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Commit | Line | Data |
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3185942a | 1 | /* jobs.c - functions that make children, remember them, and handle their termination. */ |
726f6388 | 2 | |
ccc6cda3 JA |
3 | /* This file works with both POSIX and BSD systems. It implements job |
4 | control. */ | |
726f6388 | 5 | |
a0c0a00f | 6 | /* Copyright (C) 1989-2015 Free Software Foundation, Inc. |
726f6388 JA |
7 | |
8 | This file is part of GNU Bash, the Bourne Again SHell. | |
9 | ||
3185942a JA |
10 | Bash is free software: you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation, either version 3 of the License, or | |
13 | (at your option) any later version. | |
726f6388 | 14 | |
3185942a JA |
15 | Bash is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
726f6388 | 19 | |
3185942a JA |
20 | You should have received a copy of the GNU General Public License |
21 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
22 | */ | |
726f6388 | 23 | |
726f6388 JA |
24 | #include "config.h" |
25 | ||
726f6388 JA |
26 | #include "bashtypes.h" |
27 | #include "trap.h" | |
28 | #include <stdio.h> | |
29 | #include <signal.h> | |
30 | #include <errno.h> | |
31 | ||
ccc6cda3 JA |
32 | #if defined (HAVE_UNISTD_H) |
33 | # include <unistd.h> | |
34 | #endif | |
726f6388 | 35 | |
f73dda09 | 36 | #include "posixtime.h" |
ccc6cda3 | 37 | |
cce855bc | 38 | #if defined (HAVE_SYS_RESOURCE_H) && defined (HAVE_WAIT3) && !defined (_POSIX_VERSION) && !defined (RLIMTYPE) |
ccc6cda3 | 39 | # include <sys/resource.h> |
cce855bc | 40 | #endif /* !_POSIX_VERSION && HAVE_SYS_RESOURCE_H && HAVE_WAIT3 && !RLIMTYPE */ |
726f6388 | 41 | |
b80f6443 JA |
42 | #if defined (HAVE_SYS_FILE_H) |
43 | # include <sys/file.h> | |
44 | #endif | |
45 | ||
726f6388 JA |
46 | #include "filecntl.h" |
47 | #include <sys/ioctl.h> | |
ac50fbac | 48 | #if defined (HAVE_SYS_PARAM_H) |
726f6388 | 49 | #include <sys/param.h> |
ac50fbac | 50 | #endif |
726f6388 JA |
51 | |
52 | #if defined (BUFFERED_INPUT) | |
53 | # include "input.h" | |
54 | #endif | |
55 | ||
ccc6cda3 | 56 | /* Need to include this up here for *_TTY_DRIVER definitions. */ |
bb70624e | 57 | #include "shtty.h" |
726f6388 JA |
58 | |
59 | /* Define this if your output is getting swallowed. It's a no-op on | |
60 | machines with the termio or termios tty drivers. */ | |
61 | /* #define DRAIN_OUTPUT */ | |
62 | ||
726f6388 | 63 | /* For the TIOCGPGRP and TIOCSPGRP ioctl parameters on HP-UX */ |
726f6388 JA |
64 | #if defined (hpux) && !defined (TERMIOS_TTY_DRIVER) |
65 | # include <bsdtty.h> | |
66 | #endif /* hpux && !TERMIOS_TTY_DRIVER */ | |
67 | ||
68 | #include "bashansi.h" | |
b80f6443 | 69 | #include "bashintl.h" |
726f6388 JA |
70 | #include "shell.h" |
71 | #include "jobs.h" | |
3185942a | 72 | #include "execute_cmd.h" |
ccc6cda3 | 73 | #include "flags.h" |
726f6388 JA |
74 | |
75 | #include "builtins/builtext.h" | |
76 | #include "builtins/common.h" | |
77 | ||
a0c0a00f CR |
78 | #if defined (READLINE) |
79 | # include <readline/readline.h> | |
80 | #endif | |
81 | ||
726f6388 JA |
82 | #if !defined (errno) |
83 | extern int errno; | |
84 | #endif /* !errno */ | |
85 | ||
495aee44 CR |
86 | #if !defined (HAVE_KILLPG) |
87 | extern int killpg __P((pid_t, int)); | |
88 | #endif | |
89 | ||
ac50fbac CR |
90 | #if !DEFAULT_CHILD_MAX |
91 | # define DEFAULT_CHILD_MAX 32 | |
92 | #endif | |
93 | ||
94 | #if !MAX_CHILD_MAX | |
95 | # define MAX_CHILD_MAX 8192 | |
96 | #endif | |
97 | ||
0628567a JA |
98 | #if !defined (DEBUG) |
99 | #define MAX_JOBS_IN_ARRAY 4096 /* production */ | |
100 | #else | |
101 | #define MAX_JOBS_IN_ARRAY 128 /* testing */ | |
102 | #endif | |
103 | ||
a0c0a00f CR |
104 | /* XXX for now */ |
105 | #define PIDSTAT_TABLE_SZ 4096 | |
106 | #define BGPIDS_TABLE_SZ 512 | |
107 | ||
0628567a JA |
108 | /* Flag values for second argument to delete_job */ |
109 | #define DEL_WARNSTOPPED 1 /* warn about deleting stopped jobs */ | |
110 | #define DEL_NOBGPID 2 /* don't add pgrp leader to bgpids */ | |
b72432fd | 111 | |
ccc6cda3 JA |
112 | /* Take care of system dependencies that must be handled when waiting for |
113 | children. The arguments to the WAITPID macro match those to the Posix.1 | |
114 | waitpid() function. */ | |
115 | ||
116 | #if defined (ultrix) && defined (mips) && defined (_POSIX_VERSION) | |
117 | # define WAITPID(pid, statusp, options) \ | |
118 | wait3 ((union wait *)statusp, options, (struct rusage *)0) | |
119 | #else | |
120 | # if defined (_POSIX_VERSION) || defined (HAVE_WAITPID) | |
121 | # define WAITPID(pid, statusp, options) \ | |
122 | waitpid ((pid_t)pid, statusp, options) | |
123 | # else | |
124 | # if defined (HAVE_WAIT3) | |
125 | # define WAITPID(pid, statusp, options) \ | |
126 | wait3 (statusp, options, (struct rusage *)0) | |
127 | # else | |
128 | # define WAITPID(pid, statusp, options) \ | |
129 | wait3 (statusp, options, (int *)0) | |
130 | # endif /* HAVE_WAIT3 */ | |
131 | # endif /* !_POSIX_VERSION && !HAVE_WAITPID*/ | |
132 | #endif /* !(Ultrix && mips && _POSIX_VERSION) */ | |
133 | ||
134 | /* getpgrp () varies between systems. Even systems that claim to be | |
135 | Posix.1 compatible lie sometimes (Ultrix, SunOS4, apollo). */ | |
136 | #if defined (GETPGRP_VOID) | |
137 | # define getpgid(p) getpgrp () | |
138 | #else | |
139 | # define getpgid(p) getpgrp (p) | |
140 | #endif /* !GETPGRP_VOID */ | |
141 | ||
142 | /* If the system needs it, REINSTALL_SIGCHLD_HANDLER will reinstall the | |
143 | handler for SIGCHLD. */ | |
144 | #if defined (MUST_REINSTALL_SIGHANDLERS) | |
145 | # define REINSTALL_SIGCHLD_HANDLER signal (SIGCHLD, sigchld_handler) | |
146 | #else | |
147 | # define REINSTALL_SIGCHLD_HANDLER | |
148 | #endif /* !MUST_REINSTALL_SIGHANDLERS */ | |
149 | ||
f73dda09 | 150 | /* Some systems let waitpid(2) tell callers about stopped children. */ |
95732b49 JA |
151 | #if !defined (WCONTINUED) || defined (WCONTINUED_BROKEN) |
152 | # undef WCONTINUED | |
f73dda09 | 153 | # define WCONTINUED 0 |
b80f6443 JA |
154 | #endif |
155 | #if !defined (WIFCONTINUED) | |
f73dda09 JA |
156 | # define WIFCONTINUED(s) (0) |
157 | #endif | |
158 | ||
ccc6cda3 JA |
159 | /* The number of additional slots to allocate when we run out. */ |
160 | #define JOB_SLOTS 8 | |
161 | ||
f73dda09 JA |
162 | typedef int sh_job_map_func_t __P((JOB *, int, int, int)); |
163 | ||
726f6388 | 164 | /* Variables used here but defined in other files. */ |
7117c2d2 | 165 | extern int subshell_environment, line_number; |
f73dda09 | 166 | extern int posixly_correct, shell_level; |
b80f6443 | 167 | extern int last_command_exit_value, last_command_exit_signal; |
726f6388 | 168 | extern int loop_level, breaking; |
3185942a | 169 | extern int executing_list; |
28ef6c31 | 170 | extern int sourcelevel; |
0628567a | 171 | extern int running_trap; |
f73dda09 | 172 | extern sh_builtin_func_t *this_shell_builtin; |
726f6388 JA |
173 | extern char *shell_name, *this_command_name; |
174 | extern sigset_t top_level_mask; | |
bb70624e | 175 | extern procenv_t wait_intr_buf; |
a0c0a00f | 176 | extern int wait_intr_flag; |
7117c2d2 | 177 | extern int wait_signal_received; |
bb70624e | 178 | extern WORD_LIST *subst_assign_varlist; |
726f6388 | 179 | |
a0c0a00f CR |
180 | extern SigHandler **original_signals; |
181 | ||
182 | extern void set_original_signal __P((int, SigHandler *)); | |
183 | ||
95732b49 JA |
184 | static struct jobstats zerojs = { -1L, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NO_JOB, NO_JOB, 0, 0 }; |
185 | struct jobstats js = { -1L, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NO_JOB, NO_JOB, 0, 0 }; | |
186 | ||
a0c0a00f | 187 | ps_index_t pidstat_table[PIDSTAT_TABLE_SZ]; |
95732b49 JA |
188 | struct bgpids bgpids = { 0, 0, 0 }; |
189 | ||
726f6388 JA |
190 | /* The array of known jobs. */ |
191 | JOB **jobs = (JOB **)NULL; | |
192 | ||
95732b49 | 193 | #if 0 |
726f6388 JA |
194 | /* The number of slots currently allocated to JOBS. */ |
195 | int job_slots = 0; | |
95732b49 | 196 | #endif |
726f6388 | 197 | |
726f6388 JA |
198 | /* The controlling tty for this shell. */ |
199 | int shell_tty = -1; | |
200 | ||
201 | /* The shell's process group. */ | |
202 | pid_t shell_pgrp = NO_PID; | |
203 | ||
204 | /* The terminal's process group. */ | |
205 | pid_t terminal_pgrp = NO_PID; | |
206 | ||
207 | /* The process group of the shell's parent. */ | |
208 | pid_t original_pgrp = NO_PID; | |
209 | ||
210 | /* The process group of the pipeline currently being made. */ | |
211 | pid_t pipeline_pgrp = (pid_t)0; | |
212 | ||
213 | #if defined (PGRP_PIPE) | |
214 | /* Pipes which each shell uses to communicate with the process group leader | |
215 | until all of the processes in a pipeline have been started. Then the | |
216 | process leader is allowed to continue. */ | |
217 | int pgrp_pipe[2] = { -1, -1 }; | |
218 | #endif | |
ccc6cda3 | 219 | |
95732b49 | 220 | #if 0 |
726f6388 JA |
221 | /* The job which is current; i.e. the one that `%+' stands for. */ |
222 | int current_job = NO_JOB; | |
223 | ||
224 | /* The previous job; i.e. the one that `%-' stands for. */ | |
225 | int previous_job = NO_JOB; | |
95732b49 | 226 | #endif |
726f6388 JA |
227 | |
228 | /* Last child made by the shell. */ | |
ac50fbac | 229 | volatile pid_t last_made_pid = NO_PID; |
726f6388 JA |
230 | |
231 | /* Pid of the last asynchronous child. */ | |
ac50fbac | 232 | volatile pid_t last_asynchronous_pid = NO_PID; |
726f6388 JA |
233 | |
234 | /* The pipeline currently being built. */ | |
235 | PROCESS *the_pipeline = (PROCESS *)NULL; | |
236 | ||
237 | /* If this is non-zero, do job control. */ | |
238 | int job_control = 1; | |
239 | ||
a0c0a00f CR |
240 | /* Are we running in background? (terminal_pgrp != shell_pgrp) */ |
241 | int running_in_background = 0; | |
242 | ||
726f6388 JA |
243 | /* Call this when you start making children. */ |
244 | int already_making_children = 0; | |
245 | ||
ccc6cda3 JA |
246 | /* If this is non-zero, $LINES and $COLUMNS are reset after every process |
247 | exits from get_tty_state(). */ | |
ac50fbac | 248 | int check_window_size = CHECKWINSIZE_DEFAULT; |
ccc6cda3 | 249 | |
a0c0a00f CR |
250 | PROCESS *last_procsub_child = (PROCESS *)NULL; |
251 | ||
726f6388 | 252 | /* Functions local to this file. */ |
f73dda09 | 253 | |
f73dda09 JA |
254 | static sighandler wait_sigint_handler __P((int)); |
255 | static sighandler sigchld_handler __P((int)); | |
f73dda09 JA |
256 | static sighandler sigcont_sighandler __P((int)); |
257 | static sighandler sigstop_sighandler __P((int)); | |
258 | ||
259 | static int waitchld __P((pid_t, int)); | |
260 | ||
7117c2d2 | 261 | static PROCESS *find_pipeline __P((pid_t, int, int *)); |
95732b49 | 262 | static PROCESS *find_process __P((pid_t, int, int *)); |
f73dda09 JA |
263 | |
264 | static char *current_working_directory __P((void)); | |
265 | static char *job_working_directory __P((void)); | |
b80f6443 | 266 | static char *j_strsignal __P((int)); |
f73dda09 JA |
267 | static char *printable_job_status __P((int, PROCESS *, int)); |
268 | ||
95732b49 | 269 | static PROCESS *find_last_proc __P((int, int)); |
7117c2d2 | 270 | static pid_t find_last_pid __P((int, int)); |
f73dda09 JA |
271 | |
272 | static int set_new_line_discipline __P((int)); | |
273 | static int map_over_jobs __P((sh_job_map_func_t *, int, int)); | |
274 | static int job_last_stopped __P((int)); | |
275 | static int job_last_running __P((int)); | |
276 | static int most_recent_job_in_state __P((int, JOB_STATE)); | |
95732b49 | 277 | static int find_job __P((pid_t, int, PROCESS **)); |
f73dda09 JA |
278 | static int print_job __P((JOB *, int, int, int)); |
279 | static int process_exit_status __P((WAIT)); | |
b80f6443 | 280 | static int process_exit_signal __P((WAIT)); |
f73dda09 JA |
281 | static int set_job_status_and_cleanup __P((int)); |
282 | ||
f1be666c | 283 | static WAIT job_signal_status __P((int)); |
f73dda09 JA |
284 | static WAIT raw_job_exit_status __P((int)); |
285 | ||
286 | static void notify_of_job_status __P((void)); | |
95732b49 | 287 | static void reset_job_indices __P((void)); |
f73dda09 | 288 | static void cleanup_dead_jobs __P((void)); |
95732b49 JA |
289 | static int processes_in_job __P((int)); |
290 | static void realloc_jobs_list __P((void)); | |
7117c2d2 | 291 | static int compact_jobs_list __P((int)); |
f73dda09 JA |
292 | static void add_process __P((char *, pid_t)); |
293 | static void print_pipeline __P((PROCESS *, int, int, FILE *)); | |
294 | static void pretty_print_job __P((int, int, FILE *)); | |
295 | static void set_current_job __P((int)); | |
296 | static void reset_current __P((void)); | |
297 | static void set_job_running __P((int)); | |
298 | static void setjstatus __P((int)); | |
3185942a | 299 | static int maybe_give_terminal_to __P((pid_t, pid_t, int)); |
f73dda09 JA |
300 | static void mark_all_jobs_as_dead __P((void)); |
301 | static void mark_dead_jobs_as_notified __P((int)); | |
302 | static void restore_sigint_handler __P((void)); | |
726f6388 | 303 | #if defined (PGRP_PIPE) |
f73dda09 | 304 | static void pipe_read __P((int *)); |
726f6388 JA |
305 | #endif |
306 | ||
a0c0a00f CR |
307 | /* Hash table manipulation */ |
308 | ||
309 | static ps_index_t *pshash_getbucket __P((pid_t)); | |
310 | static void pshash_delindex __P((ps_index_t)); | |
311 | ||
312 | /* Saved background process status management */ | |
95732b49 JA |
313 | static struct pidstat *bgp_add __P((pid_t, int)); |
314 | static int bgp_delete __P((pid_t)); | |
315 | static void bgp_clear __P((void)); | |
316 | static int bgp_search __P((pid_t)); | |
a0c0a00f CR |
317 | |
318 | static ps_index_t bgp_getindex __P((void)); | |
319 | static void bgp_resize __P((void)); /* XXX */ | |
95732b49 | 320 | |
7117c2d2 JA |
321 | #if defined (ARRAY_VARS) |
322 | static int *pstatuses; /* list of pipeline statuses */ | |
323 | static int statsize; | |
324 | #endif | |
325 | ||
326 | /* Used to synchronize between wait_for and other functions and the SIGCHLD | |
327 | signal handler. */ | |
ccc6cda3 | 328 | static int sigchld; |
7117c2d2 JA |
329 | static int queue_sigchld; |
330 | ||
331 | #define QUEUE_SIGCHLD(os) (os) = sigchld, queue_sigchld++ | |
332 | ||
333 | #define UNQUEUE_SIGCHLD(os) \ | |
334 | do { \ | |
335 | queue_sigchld--; \ | |
336 | if (queue_sigchld == 0 && os != sigchld) \ | |
337 | waitchld (-1, 0); \ | |
338 | } while (0) | |
339 | ||
340 | static SigHandler *old_tstp, *old_ttou, *old_ttin; | |
341 | static SigHandler *old_cont = (SigHandler *)SIG_DFL; | |
342 | ||
ccc6cda3 | 343 | /* A place to temporarily save the current pipeline. */ |
a0c0a00f | 344 | static struct pipeline_saver *saved_pipeline; |
ccc6cda3 | 345 | static int saved_already_making_children; |
726f6388 JA |
346 | |
347 | /* Set this to non-zero whenever you don't want the jobs list to change at | |
348 | all: no jobs deleted and no status change notifications. This is used, | |
349 | for example, when executing SIGCHLD traps, which may run arbitrary | |
350 | commands. */ | |
ccc6cda3 | 351 | static int jobs_list_frozen; |
726f6388 | 352 | |
28ef6c31 JA |
353 | static char retcode_name_buffer[64]; |
354 | ||
726f6388 JA |
355 | #if !defined (_POSIX_VERSION) |
356 | ||
357 | /* These are definitions to map POSIX 1003.1 functions onto existing BSD | |
358 | library functions and system calls. */ | |
359 | #define setpgid(pid, pgrp) setpgrp (pid, pgrp) | |
360 | #define tcsetpgrp(fd, pgrp) ioctl ((fd), TIOCSPGRP, &(pgrp)) | |
361 | ||
362 | pid_t | |
363 | tcgetpgrp (fd) | |
364 | int fd; | |
365 | { | |
366 | pid_t pgrp; | |
367 | ||
368 | /* ioctl will handle setting errno correctly. */ | |
369 | if (ioctl (fd, TIOCGPGRP, &pgrp) < 0) | |
370 | return (-1); | |
371 | return (pgrp); | |
372 | } | |
373 | ||
726f6388 JA |
374 | #endif /* !_POSIX_VERSION */ |
375 | ||
0628567a | 376 | /* Initialize the global job stats structure and other bookkeeping variables */ |
95732b49 JA |
377 | void |
378 | init_job_stats () | |
379 | { | |
380 | js = zerojs; | |
381 | } | |
382 | ||
726f6388 JA |
383 | /* Return the working directory for the current process. Unlike |
384 | job_working_directory, this does not call malloc (), nor do any | |
385 | of the functions it calls. This is so that it can safely be called | |
386 | from a signal handler. */ | |
387 | static char * | |
388 | current_working_directory () | |
389 | { | |
390 | char *dir; | |
ccc6cda3 | 391 | static char d[PATH_MAX]; |
726f6388 JA |
392 | |
393 | dir = get_string_value ("PWD"); | |
394 | ||
ccc6cda3 | 395 | if (dir == 0 && the_current_working_directory && no_symbolic_links) |
726f6388 JA |
396 | dir = the_current_working_directory; |
397 | ||
ccc6cda3 | 398 | if (dir == 0) |
726f6388 | 399 | { |
ccc6cda3 | 400 | dir = getcwd (d, sizeof(d)); |
726f6388 JA |
401 | if (dir) |
402 | dir = d; | |
403 | } | |
404 | ||
ccc6cda3 | 405 | return (dir == 0) ? "<unknown>" : dir; |
726f6388 JA |
406 | } |
407 | ||
408 | /* Return the working directory for the current process. */ | |
409 | static char * | |
410 | job_working_directory () | |
411 | { | |
412 | char *dir; | |
413 | ||
414 | dir = get_string_value ("PWD"); | |
415 | if (dir) | |
416 | return (savestring (dir)); | |
417 | ||
418 | dir = get_working_directory ("job-working-directory"); | |
419 | if (dir) | |
420 | return (dir); | |
421 | ||
422 | return (savestring ("<unknown>")); | |
423 | } | |
424 | ||
425 | void | |
426 | making_children () | |
427 | { | |
428 | if (already_making_children) | |
429 | return; | |
430 | ||
431 | already_making_children = 1; | |
432 | start_pipeline (); | |
433 | } | |
434 | ||
435 | void | |
436 | stop_making_children () | |
437 | { | |
438 | already_making_children = 0; | |
439 | } | |
440 | ||
441 | void | |
442 | cleanup_the_pipeline () | |
443 | { | |
95732b49 JA |
444 | PROCESS *disposer; |
445 | sigset_t set, oset; | |
446 | ||
447 | BLOCK_CHILD (set, oset); | |
448 | disposer = the_pipeline; | |
449 | the_pipeline = (PROCESS *)NULL; | |
450 | UNBLOCK_CHILD (oset); | |
451 | ||
452 | if (disposer) | |
453 | discard_pipeline (disposer); | |
726f6388 JA |
454 | } |
455 | ||
a0c0a00f CR |
456 | struct pipeline_saver * |
457 | alloc_pipeline_saver () | |
458 | { | |
459 | struct pipeline_saver *ret; | |
460 | ||
461 | ret = (struct pipeline_saver *)xmalloc (sizeof (struct pipeline_saver)); | |
462 | ret->pipeline = 0; | |
463 | ret->next = 0; | |
464 | return ret; | |
465 | } | |
466 | ||
ccc6cda3 JA |
467 | void |
468 | save_pipeline (clear) | |
469 | int clear; | |
470 | { | |
a0c0a00f CR |
471 | sigset_t set, oset; |
472 | struct pipeline_saver *saver; | |
473 | ||
474 | BLOCK_CHILD (set, oset); | |
475 | saver = alloc_pipeline_saver (); | |
476 | saver->pipeline = the_pipeline; | |
477 | saver->next = saved_pipeline; | |
478 | saved_pipeline = saver; | |
ccc6cda3 JA |
479 | if (clear) |
480 | the_pipeline = (PROCESS *)NULL; | |
95732b49 | 481 | saved_already_making_children = already_making_children; |
a0c0a00f | 482 | UNBLOCK_CHILD (oset); |
ccc6cda3 JA |
483 | } |
484 | ||
a0c0a00f | 485 | PROCESS * |
ccc6cda3 JA |
486 | restore_pipeline (discard) |
487 | int discard; | |
488 | { | |
489 | PROCESS *old_pipeline; | |
a0c0a00f CR |
490 | sigset_t set, oset; |
491 | struct pipeline_saver *saver; | |
ccc6cda3 | 492 | |
a0c0a00f | 493 | BLOCK_CHILD (set, oset); |
ccc6cda3 | 494 | old_pipeline = the_pipeline; |
a0c0a00f CR |
495 | the_pipeline = saved_pipeline->pipeline; |
496 | saver = saved_pipeline; | |
497 | saved_pipeline = saved_pipeline->next; | |
498 | free (saver); | |
ccc6cda3 | 499 | already_making_children = saved_already_making_children; |
a0c0a00f CR |
500 | UNBLOCK_CHILD (oset); |
501 | ||
89a92869 | 502 | if (discard && old_pipeline) |
a0c0a00f CR |
503 | { |
504 | discard_pipeline (old_pipeline); | |
505 | return ((PROCESS *)NULL); | |
506 | } | |
507 | return old_pipeline; | |
ccc6cda3 JA |
508 | } |
509 | ||
726f6388 JA |
510 | /* Start building a pipeline. */ |
511 | void | |
512 | start_pipeline () | |
513 | { | |
514 | if (the_pipeline) | |
515 | { | |
ccc6cda3 | 516 | cleanup_the_pipeline (); |
726f6388 JA |
517 | pipeline_pgrp = 0; |
518 | #if defined (PGRP_PIPE) | |
3185942a | 519 | sh_closepipe (pgrp_pipe); |
726f6388 JA |
520 | #endif |
521 | } | |
522 | ||
523 | #if defined (PGRP_PIPE) | |
524 | if (job_control) | |
525 | { | |
526 | if (pipe (pgrp_pipe) == -1) | |
3185942a | 527 | sys_error (_("start_pipeline: pgrp pipe")); |
726f6388 JA |
528 | } |
529 | #endif | |
530 | } | |
531 | ||
532 | /* Stop building a pipeline. Install the process list in the job array. | |
533 | This returns the index of the newly installed job. | |
534 | DEFERRED is a command structure to be executed upon satisfactory | |
535 | execution exit of this pipeline. */ | |
536 | int | |
537 | stop_pipeline (async, deferred) | |
538 | int async; | |
539 | COMMAND *deferred; | |
540 | { | |
541 | register int i, j; | |
ccc6cda3 | 542 | JOB *newjob; |
726f6388 JA |
543 | sigset_t set, oset; |
544 | ||
545 | BLOCK_CHILD (set, oset); | |
546 | ||
547 | #if defined (PGRP_PIPE) | |
548 | /* The parent closes the process group synchronization pipe. */ | |
3185942a | 549 | sh_closepipe (pgrp_pipe); |
726f6388 | 550 | #endif |
ccc6cda3 | 551 | |
726f6388 JA |
552 | cleanup_dead_jobs (); |
553 | ||
95732b49 | 554 | if (js.j_jobslots == 0) |
726f6388 | 555 | { |
95732b49 JA |
556 | js.j_jobslots = JOB_SLOTS; |
557 | jobs = (JOB **)xmalloc (js.j_jobslots * sizeof (JOB *)); | |
726f6388 JA |
558 | |
559 | /* Now blank out these new entries. */ | |
95732b49 | 560 | for (i = 0; i < js.j_jobslots; i++) |
726f6388 | 561 | jobs[i] = (JOB *)NULL; |
95732b49 JA |
562 | |
563 | js.j_firstj = js.j_lastj = js.j_njobs = 0; | |
726f6388 JA |
564 | } |
565 | ||
566 | /* Scan from the last slot backward, looking for the next free one. */ | |
b80f6443 | 567 | /* XXX - revisit this interactive assumption */ |
95732b49 | 568 | /* XXX - this way for now */ |
726f6388 JA |
569 | if (interactive) |
570 | { | |
95732b49 | 571 | for (i = js.j_jobslots; i; i--) |
726f6388 JA |
572 | if (jobs[i - 1]) |
573 | break; | |
574 | } | |
575 | else | |
576 | { | |
95732b49 JA |
577 | #if 0 |
578 | /* This wraps around, but makes it inconvenient to extend the array */ | |
579 | for (i = js.j_lastj+1; i != js.j_lastj; i++) | |
580 | { | |
581 | if (i >= js.j_jobslots) | |
582 | i = 0; | |
583 | if (jobs[i] == 0) | |
584 | break; | |
585 | } | |
586 | if (i == js.j_lastj) | |
587 | i = js.j_jobslots; | |
588 | #else | |
589 | /* This doesn't wrap around yet. */ | |
590 | for (i = js.j_lastj ? js.j_lastj + 1 : js.j_lastj; i < js.j_jobslots; i++) | |
ccc6cda3 | 591 | if (jobs[i] == 0) |
726f6388 | 592 | break; |
95732b49 | 593 | #endif |
726f6388 JA |
594 | } |
595 | ||
596 | /* Do we need more room? */ | |
7117c2d2 JA |
597 | |
598 | /* First try compaction */ | |
95732b49 | 599 | if ((interactive_shell == 0 || subshell_environment) && i == js.j_jobslots && js.j_jobslots >= MAX_JOBS_IN_ARRAY) |
7117c2d2 JA |
600 | i = compact_jobs_list (0); |
601 | ||
602 | /* If we can't compact, reallocate */ | |
95732b49 | 603 | if (i == js.j_jobslots) |
726f6388 | 604 | { |
95732b49 JA |
605 | js.j_jobslots += JOB_SLOTS; |
606 | jobs = (JOB **)xrealloc (jobs, (js.j_jobslots * sizeof (JOB *))); | |
726f6388 | 607 | |
95732b49 | 608 | for (j = i; j < js.j_jobslots; j++) |
726f6388 JA |
609 | jobs[j] = (JOB *)NULL; |
610 | } | |
611 | ||
612 | /* Add the current pipeline to the job list. */ | |
613 | if (the_pipeline) | |
614 | { | |
615 | register PROCESS *p; | |
95732b49 | 616 | int any_running, any_stopped, n; |
726f6388 JA |
617 | |
618 | newjob = (JOB *)xmalloc (sizeof (JOB)); | |
619 | ||
95732b49 | 620 | for (n = 1, p = the_pipeline; p->next != the_pipeline; n++, p = p->next) |
ccc6cda3 | 621 | ; |
726f6388 JA |
622 | p->next = (PROCESS *)NULL; |
623 | newjob->pipe = REVERSE_LIST (the_pipeline, PROCESS *); | |
ccc6cda3 JA |
624 | for (p = newjob->pipe; p->next; p = p->next) |
625 | ; | |
726f6388 JA |
626 | p->next = newjob->pipe; |
627 | ||
628 | the_pipeline = (PROCESS *)NULL; | |
629 | newjob->pgrp = pipeline_pgrp; | |
630 | pipeline_pgrp = 0; | |
631 | ||
632 | newjob->flags = 0; | |
633 | ||
634 | /* Flag to see if in another pgrp. */ | |
635 | if (job_control) | |
636 | newjob->flags |= J_JOBCONTROL; | |
637 | ||
638 | /* Set the state of this pipeline. */ | |
ccc6cda3 | 639 | p = newjob->pipe; |
95732b49 | 640 | any_running = any_stopped = 0; |
ccc6cda3 JA |
641 | do |
642 | { | |
95732b49 JA |
643 | any_running |= PRUNNING (p); |
644 | any_stopped |= PSTOPPED (p); | |
ccc6cda3 JA |
645 | p = p->next; |
646 | } | |
647 | while (p != newjob->pipe); | |
726f6388 | 648 | |
95732b49 | 649 | newjob->state = any_running ? JRUNNING : (any_stopped ? JSTOPPED : JDEAD); |
726f6388 JA |
650 | newjob->wd = job_working_directory (); |
651 | newjob->deferred = deferred; | |
652 | ||
f73dda09 | 653 | newjob->j_cleanup = (sh_vptrfunc_t *)NULL; |
ccc6cda3 JA |
654 | newjob->cleanarg = (PTR_T) NULL; |
655 | ||
726f6388 | 656 | jobs[i] = newjob; |
ccc6cda3 JA |
657 | if (newjob->state == JDEAD && (newjob->flags & J_FOREGROUND)) |
658 | setjstatus (i); | |
95732b49 JA |
659 | if (newjob->state == JDEAD) |
660 | { | |
661 | js.c_reaped += n; /* wouldn't have been done since this was not part of a job */ | |
662 | js.j_ndead++; | |
663 | } | |
664 | js.c_injobs += n; | |
665 | ||
666 | js.j_lastj = i; | |
667 | js.j_njobs++; | |
726f6388 | 668 | } |
ccc6cda3 JA |
669 | else |
670 | newjob = (JOB *)NULL; | |
726f6388 | 671 | |
95732b49 JA |
672 | if (newjob) |
673 | js.j_lastmade = newjob; | |
674 | ||
726f6388 JA |
675 | if (async) |
676 | { | |
677 | if (newjob) | |
95732b49 JA |
678 | { |
679 | newjob->flags &= ~J_FOREGROUND; | |
680 | newjob->flags |= J_ASYNC; | |
681 | js.j_lastasync = newjob; | |
682 | } | |
726f6388 JA |
683 | reset_current (); |
684 | } | |
685 | else | |
686 | { | |
687 | if (newjob) | |
688 | { | |
689 | newjob->flags |= J_FOREGROUND; | |
690 | /* | |
691 | * !!!!! NOTE !!!!! (chet@ins.cwru.edu) | |
692 | * | |
693 | * The currently-accepted job control wisdom says to set the | |
694 | * terminal's process group n+1 times in an n-step pipeline: | |
695 | * once in the parent and once in each child. This is where | |
696 | * the parent gives it away. | |
697 | * | |
0628567a | 698 | * Don't give the terminal away if this shell is an asynchronous |
a0c0a00f CR |
699 | * subshell or if we're a (presumably non-interactive) shell running |
700 | * in the background. | |
0628567a | 701 | * |
726f6388 | 702 | */ |
a0c0a00f | 703 | if (job_control && newjob->pgrp && (subshell_environment&SUBSHELL_ASYNC) == 0 && running_in_background == 0) |
3185942a | 704 | maybe_give_terminal_to (shell_pgrp, newjob->pgrp, 0); |
726f6388 JA |
705 | } |
706 | } | |
707 | ||
708 | stop_making_children (); | |
709 | UNBLOCK_CHILD (oset); | |
495aee44 | 710 | return (newjob ? i : js.j_current); |
95732b49 JA |
711 | } |
712 | ||
713 | /* Functions to manage the list of exited background pids whose status has | |
a0c0a00f | 714 | been saved. |
95732b49 | 715 | |
a0c0a00f CR |
716 | pidstat_table: |
717 | ||
718 | The current implementation is a hash table using a single (separate) arena | |
719 | for storage that can be allocated and freed as a unit. The size of the hash | |
720 | table is a multiple of PIDSTAT_TABLE_SZ (4096) and multiple PIDs that hash | |
721 | to the same value are chained through the bucket_next and bucket_prev | |
722 | pointers (basically coalesced hashing for collision resolution). | |
723 | ||
724 | bgpids.storage: | |
725 | ||
726 | All pid/status storage is done using the circular buffer bgpids.storage. | |
727 | This must contain at least js.c_childmax entries. The circular buffer is | |
728 | used to supply the ordered list Posix requires ("the last CHILD_MAX | |
729 | processes"). To avoid searching the entire storage table for a given PID, | |
730 | the hash table (pidstat_table) holds pointers into the storage arena and | |
731 | uses a doubly-linked list of cells (bucket_next/bucket_prev, also pointers | |
732 | into the arena) to implement collision resolution. */ | |
733 | ||
734 | /* The number of elements in bgpids.storage always has to be > js.c_childmax for | |
735 | the circular buffer to work right. */ | |
736 | static void | |
737 | bgp_resize () | |
738 | { | |
739 | ps_index_t nsize; | |
740 | ps_index_t psi; | |
741 | ||
742 | if (bgpids.nalloc == 0) | |
743 | { | |
744 | /* invalidate hash table when bgpids table is reallocated */ | |
745 | for (psi = 0; psi < PIDSTAT_TABLE_SZ; psi++) | |
746 | pidstat_table[psi] = NO_PIDSTAT; | |
747 | nsize = BGPIDS_TABLE_SZ; /* should be power of 2 */ | |
748 | bgpids.head = 0; | |
749 | } | |
750 | else | |
751 | nsize = bgpids.nalloc; | |
752 | ||
753 | while (nsize < js.c_childmax) | |
754 | nsize *= 2; | |
755 | ||
756 | if (bgpids.nalloc < js.c_childmax) | |
757 | { | |
758 | bgpids.storage = (struct pidstat *)xrealloc (bgpids.storage, nsize * sizeof (struct pidstat)); | |
759 | ||
760 | for (psi = bgpids.nalloc; psi < nsize; psi++) | |
761 | bgpids.storage[psi].pid = NO_PID; | |
762 | ||
763 | bgpids.nalloc = nsize; | |
764 | ||
765 | } | |
766 | else if (bgpids.head >= bgpids.nalloc) /* wrap around */ | |
767 | bgpids.head = 0; | |
768 | } | |
769 | ||
770 | static ps_index_t | |
771 | bgp_getindex () | |
772 | { | |
773 | ps_index_t psi; | |
774 | ||
775 | if (bgpids.nalloc < js.c_childmax || bgpids.head >= bgpids.nalloc) | |
776 | bgp_resize (); | |
777 | ||
778 | pshash_delindex (bgpids.head); /* XXX - clear before reusing */ | |
779 | return bgpids.head++; | |
780 | } | |
781 | ||
782 | static ps_index_t * | |
783 | pshash_getbucket (pid) | |
95732b49 | 784 | pid_t pid; |
95732b49 | 785 | { |
a0c0a00f | 786 | unsigned long hash; /* XXX - u_bits32_t */ |
95732b49 | 787 | |
a0c0a00f CR |
788 | hash = pid * 0x9e370001UL; |
789 | return (&pidstat_table[hash % PIDSTAT_TABLE_SZ]); | |
726f6388 JA |
790 | } |
791 | ||
95732b49 JA |
792 | static struct pidstat * |
793 | bgp_add (pid, status) | |
794 | pid_t pid; | |
795 | int status; | |
796 | { | |
a0c0a00f | 797 | ps_index_t *bucket, psi; |
95732b49 JA |
798 | struct pidstat *ps; |
799 | ||
a0c0a00f CR |
800 | bucket = pshash_getbucket (pid); |
801 | psi = bgp_getindex (); | |
802 | ps = &bgpids.storage[psi]; | |
803 | ||
804 | ps->pid = pid; | |
805 | ps->status = status; | |
806 | ps->bucket_next = *bucket; | |
807 | ps->bucket_prev = NO_PIDSTAT; | |
95732b49 | 808 | |
95732b49 JA |
809 | bgpids.npid++; |
810 | ||
a0c0a00f | 811 | #if 0 |
95732b49 JA |
812 | if (bgpids.npid > js.c_childmax) |
813 | bgp_prune (); | |
a0c0a00f CR |
814 | #endif |
815 | ||
816 | if (ps->bucket_next != NO_PIDSTAT) | |
817 | bgpids.storage[ps->bucket_next].bucket_prev = psi; | |
818 | ||
819 | *bucket = psi; /* set chain head in hash table */ | |
95732b49 JA |
820 | |
821 | return ps; | |
822 | } | |
823 | ||
a0c0a00f CR |
824 | static void |
825 | pshash_delindex (psi) | |
826 | ps_index_t psi; | |
827 | { | |
828 | struct pidstat *ps; | |
829 | ||
830 | ps = &bgpids.storage[psi]; | |
831 | if (ps->pid == NO_PID) | |
832 | return; | |
833 | ||
834 | if (ps->bucket_next != NO_PID) | |
835 | bgpids.storage[ps->bucket_next].bucket_prev = ps->bucket_prev; | |
836 | if (ps->bucket_prev != NO_PID) | |
837 | bgpids.storage[ps->bucket_prev].bucket_next = ps->bucket_next; | |
838 | else | |
839 | *(pshash_getbucket (ps->pid)) = ps->bucket_next; | |
840 | } | |
841 | ||
95732b49 JA |
842 | static int |
843 | bgp_delete (pid) | |
844 | pid_t pid; | |
845 | { | |
a0c0a00f | 846 | ps_index_t psi; |
95732b49 | 847 | |
a0c0a00f CR |
848 | if (bgpids.storage == 0 || bgpids.nalloc == 0 || bgpids.npid == 0) |
849 | return 0; | |
95732b49 | 850 | |
a0c0a00f CR |
851 | /* Search chain using hash to find bucket in pidstat_table */ |
852 | for (psi = *(pshash_getbucket (pid)); psi != NO_PIDSTAT; psi = bgpids.storage[psi].bucket_next) | |
853 | if (bgpids.storage[psi].pid == pid) | |
854 | break; | |
855 | ||
856 | if (psi == NO_PIDSTAT) | |
95732b49 JA |
857 | return 0; /* not found */ |
858 | ||
859 | #if defined (DEBUG) | |
860 | itrace("bgp_delete: deleting %d", pid); | |
861 | #endif | |
862 | ||
a0c0a00f | 863 | pshash_delindex (psi); /* hash table management */ |
95732b49 JA |
864 | |
865 | bgpids.npid--; | |
95732b49 JA |
866 | return 1; |
867 | } | |
868 | ||
869 | /* Clear out the list of saved statuses */ | |
870 | static void | |
871 | bgp_clear () | |
872 | { | |
a0c0a00f CR |
873 | if (bgpids.storage == 0 || bgpids.nalloc == 0) |
874 | return; | |
875 | ||
876 | free (bgpids.storage); | |
877 | ||
878 | bgpids.storage = 0; | |
879 | bgpids.nalloc = 0; | |
880 | bgpids.head = 0; | |
95732b49 | 881 | |
95732b49 JA |
882 | bgpids.npid = 0; |
883 | } | |
884 | ||
885 | /* Search for PID in the list of saved background pids; return its status if | |
a0c0a00f CR |
886 | found. If not found, return -1. We hash to the right spot in pidstat_table |
887 | and follow the bucket chain to the end. */ | |
95732b49 JA |
888 | static int |
889 | bgp_search (pid) | |
890 | pid_t pid; | |
891 | { | |
a0c0a00f CR |
892 | ps_index_t psi; |
893 | ||
894 | if (bgpids.storage == 0 || bgpids.nalloc == 0 || bgpids.npid == 0) | |
895 | return -1; | |
896 | ||
897 | /* Search chain using hash to find bucket in pidstat_table */ | |
898 | for (psi = *(pshash_getbucket (pid)); psi != NO_PIDSTAT; psi = bgpids.storage[psi].bucket_next) | |
899 | if (bgpids.storage[psi].pid == pid) | |
900 | return (bgpids.storage[psi].status); | |
95732b49 | 901 | |
95732b49 JA |
902 | return -1; |
903 | } | |
904 | ||
a0c0a00f | 905 | #if 0 |
95732b49 JA |
906 | static void |
907 | bgp_prune () | |
908 | { | |
a0c0a00f | 909 | return; |
95732b49 | 910 | } |
a0c0a00f | 911 | #endif |
3185942a | 912 | |
95732b49 JA |
913 | /* Reset the values of js.j_lastj and js.j_firstj after one or both have |
914 | been deleted. The caller should check whether js.j_njobs is 0 before | |
915 | calling this. This wraps around, but the rest of the code does not. At | |
916 | this point, it should not matter. */ | |
917 | static void | |
918 | reset_job_indices () | |
919 | { | |
920 | int old; | |
921 | ||
922 | if (jobs[js.j_firstj] == 0) | |
923 | { | |
924 | old = js.j_firstj++; | |
f1be666c JA |
925 | if (old >= js.j_jobslots) |
926 | old = js.j_jobslots - 1; | |
95732b49 JA |
927 | while (js.j_firstj != old) |
928 | { | |
929 | if (js.j_firstj >= js.j_jobslots) | |
930 | js.j_firstj = 0; | |
f1be666c | 931 | if (jobs[js.j_firstj] || js.j_firstj == old) /* needed if old == 0 */ |
95732b49 JA |
932 | break; |
933 | js.j_firstj++; | |
934 | } | |
935 | if (js.j_firstj == old) | |
936 | js.j_firstj = js.j_lastj = js.j_njobs = 0; | |
937 | } | |
938 | if (jobs[js.j_lastj] == 0) | |
939 | { | |
940 | old = js.j_lastj--; | |
f1be666c JA |
941 | if (old < 0) |
942 | old = 0; | |
95732b49 JA |
943 | while (js.j_lastj != old) |
944 | { | |
945 | if (js.j_lastj < 0) | |
946 | js.j_lastj = js.j_jobslots - 1; | |
f1be666c | 947 | if (jobs[js.j_lastj] || js.j_lastj == old) /* needed if old == js.j_jobslots */ |
95732b49 JA |
948 | break; |
949 | js.j_lastj--; | |
950 | } | |
951 | if (js.j_lastj == old) | |
952 | js.j_firstj = js.j_lastj = js.j_njobs = 0; | |
953 | } | |
954 | } | |
955 | ||
726f6388 JA |
956 | /* Delete all DEAD jobs that the user had received notification about. */ |
957 | static void | |
958 | cleanup_dead_jobs () | |
959 | { | |
960 | register int i; | |
7117c2d2 | 961 | int os; |
726f6388 | 962 | |
95732b49 | 963 | if (js.j_jobslots == 0 || jobs_list_frozen) |
726f6388 JA |
964 | return; |
965 | ||
7117c2d2 | 966 | QUEUE_SIGCHLD(os); |
726f6388 | 967 | |
0628567a | 968 | /* XXX could use js.j_firstj and js.j_lastj here */ |
95732b49 JA |
969 | for (i = 0; i < js.j_jobslots; i++) |
970 | { | |
971 | #if defined (DEBUG) | |
972 | if (i < js.j_firstj && jobs[i]) | |
973 | itrace("cleanup_dead_jobs: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
0628567a JA |
974 | if (i > js.j_lastj && jobs[i]) |
975 | itrace("cleanup_dead_jobs: job %d non-null after js.j_lastj (%d)", i, js.j_lastj); | |
95732b49 | 976 | #endif |
726f6388 | 977 | |
95732b49 JA |
978 | if (jobs[i] && DEADJOB (i) && IS_NOTIFIED (i)) |
979 | delete_job (i, 0); | |
980 | } | |
17345e5a | 981 | |
a0c0a00f CR |
982 | #if defined (PROCESS_SUBSTITUTION) |
983 | if (last_procsub_child && last_procsub_child->running == PS_DONE) | |
984 | { | |
985 | bgp_add (last_procsub_child->pid, process_exit_status (last_procsub_child->status)); /* XXX */ | |
986 | discard_pipeline (last_procsub_child); | |
987 | last_procsub_child = (PROCESS *)NULL; | |
988 | } | |
989 | #endif | |
990 | ||
17345e5a JA |
991 | #if defined (COPROCESS_SUPPORT) |
992 | coproc_reap (); | |
993 | #endif | |
994 | ||
7117c2d2 JA |
995 | UNQUEUE_SIGCHLD(os); |
996 | } | |
997 | ||
7117c2d2 | 998 | static int |
95732b49 | 999 | processes_in_job (job) |
3185942a | 1000 | int job; |
7117c2d2 | 1001 | { |
95732b49 JA |
1002 | int nproc; |
1003 | register PROCESS *p; | |
7117c2d2 | 1004 | |
95732b49 JA |
1005 | nproc = 0; |
1006 | p = jobs[job]->pipe; | |
1007 | do | |
1008 | { | |
1009 | p = p->next; | |
1010 | nproc++; | |
1011 | } | |
1012 | while (p != jobs[job]->pipe); | |
7117c2d2 | 1013 | |
95732b49 JA |
1014 | return nproc; |
1015 | } | |
7117c2d2 | 1016 | |
0628567a JA |
1017 | static void |
1018 | delete_old_job (pid) | |
1019 | pid_t pid; | |
1020 | { | |
1021 | PROCESS *p; | |
1022 | int job; | |
1023 | ||
1024 | job = find_job (pid, 0, &p); | |
1025 | if (job != NO_JOB) | |
1026 | { | |
1027 | #ifdef DEBUG | |
1028 | itrace ("delete_old_job: found pid %d in job %d with state %d", pid, job, jobs[job]->state); | |
1029 | #endif | |
1030 | if (JOBSTATE (job) == JDEAD) | |
1031 | delete_job (job, DEL_NOBGPID); | |
1032 | else | |
1033 | { | |
ac50fbac CR |
1034 | #ifdef DEBUG |
1035 | internal_warning (_("forked pid %d appears in running job %d"), pid, job+1); | |
1036 | #endif | |
0628567a JA |
1037 | if (p) |
1038 | p->pid = 0; | |
1039 | } | |
1040 | } | |
1041 | } | |
1042 | ||
95732b49 JA |
1043 | /* Reallocate and compress the jobs list. This returns with a jobs array |
1044 | whose size is a multiple of JOB_SLOTS and can hold the current number of | |
1045 | jobs. Heuristics are used to minimize the number of new reallocs. */ | |
1046 | static void | |
1047 | realloc_jobs_list () | |
1048 | { | |
1049 | sigset_t set, oset; | |
0628567a | 1050 | int nsize, i, j, ncur, nprev; |
95732b49 | 1051 | JOB **nlist; |
7117c2d2 | 1052 | |
0628567a | 1053 | ncur = nprev = NO_JOB; |
95732b49 JA |
1054 | nsize = ((js.j_njobs + JOB_SLOTS - 1) / JOB_SLOTS); |
1055 | nsize *= JOB_SLOTS; | |
1056 | i = js.j_njobs % JOB_SLOTS; | |
1057 | if (i == 0 || i > (JOB_SLOTS >> 1)) | |
1058 | nsize += JOB_SLOTS; | |
7117c2d2 | 1059 | |
95732b49 | 1060 | BLOCK_CHILD (set, oset); |
0628567a JA |
1061 | nlist = (js.j_jobslots == nsize) ? jobs : (JOB **) xmalloc (nsize * sizeof (JOB *)); |
1062 | ||
3185942a | 1063 | js.c_reaped = js.j_ndead = 0; |
95732b49 | 1064 | for (i = j = 0; i < js.j_jobslots; i++) |
7117c2d2 | 1065 | if (jobs[i]) |
0628567a JA |
1066 | { |
1067 | if (i == js.j_current) | |
1068 | ncur = j; | |
1069 | if (i == js.j_previous) | |
1070 | nprev = j; | |
1071 | nlist[j++] = jobs[i]; | |
3185942a JA |
1072 | if (jobs[i]->state == JDEAD) |
1073 | { | |
1074 | js.j_ndead++; | |
1075 | js.c_reaped += processes_in_job (i); | |
1076 | } | |
0628567a JA |
1077 | } |
1078 | ||
ac50fbac | 1079 | #if 0 |
0628567a JA |
1080 | itrace ("realloc_jobs_list: resize jobs list from %d to %d", js.j_jobslots, nsize); |
1081 | itrace ("realloc_jobs_list: j_lastj changed from %d to %d", js.j_lastj, (j > 0) ? j - 1 : 0); | |
3185942a JA |
1082 | itrace ("realloc_jobs_list: j_njobs changed from %d to %d", js.j_njobs, j); |
1083 | itrace ("realloc_jobs_list: js.j_ndead %d js.c_reaped %d", js.j_ndead, js.c_reaped); | |
0628567a | 1084 | #endif |
7117c2d2 | 1085 | |
95732b49 | 1086 | js.j_firstj = 0; |
0628567a JA |
1087 | js.j_lastj = (j > 0) ? j - 1 : 0; |
1088 | js.j_njobs = j; | |
95732b49 | 1089 | js.j_jobslots = nsize; |
7117c2d2 | 1090 | |
0628567a JA |
1091 | /* Zero out remaining slots in new jobs list */ |
1092 | for ( ; j < nsize; j++) | |
1093 | nlist[j] = (JOB *)NULL; | |
1094 | ||
1095 | if (jobs != nlist) | |
1096 | { | |
1097 | free (jobs); | |
1098 | jobs = nlist; | |
1099 | } | |
1100 | ||
1101 | if (ncur != NO_JOB) | |
1102 | js.j_current = ncur; | |
1103 | if (nprev != NO_JOB) | |
1104 | js.j_previous = nprev; | |
1105 | ||
1106 | /* Need to reset these */ | |
1107 | if (js.j_current == NO_JOB || js.j_previous == NO_JOB || js.j_current > js.j_lastj || js.j_previous > js.j_lastj) | |
1108 | reset_current (); | |
1109 | ||
ac50fbac | 1110 | #if 0 |
0628567a JA |
1111 | itrace ("realloc_jobs_list: reset js.j_current (%d) and js.j_previous (%d)", js.j_current, js.j_previous); |
1112 | #endif | |
7117c2d2 | 1113 | |
726f6388 | 1114 | UNBLOCK_CHILD (oset); |
95732b49 JA |
1115 | } |
1116 | ||
ac50fbac | 1117 | /* Compact the jobs list by removing dead jobs. Assume that we have filled |
95732b49 JA |
1118 | the jobs array to some predefined maximum. Called when the shell is not |
1119 | the foreground process (subshell_environment != 0). Returns the first | |
1120 | available slot in the compacted list. If that value is js.j_jobslots, then | |
0628567a | 1121 | the list needs to be reallocated. The jobs array may be in new memory if |
95732b49 JA |
1122 | this returns > 0 and < js.j_jobslots. FLAGS is reserved for future use. */ |
1123 | static int | |
1124 | compact_jobs_list (flags) | |
1125 | int flags; | |
1126 | { | |
1127 | if (js.j_jobslots == 0 || jobs_list_frozen) | |
1128 | return js.j_jobslots; | |
1129 | ||
1130 | reap_dead_jobs (); | |
1131 | realloc_jobs_list (); | |
7117c2d2 | 1132 | |
ac50fbac | 1133 | #if 0 |
f1be666c JA |
1134 | itrace("compact_jobs_list: returning %d", (js.j_lastj || jobs[js.j_lastj]) ? js.j_lastj + 1 : 0); |
1135 | #endif | |
1136 | ||
1137 | return ((js.j_lastj || jobs[js.j_lastj]) ? js.j_lastj + 1 : 0); | |
726f6388 JA |
1138 | } |
1139 | ||
1140 | /* Delete the job at INDEX from the job list. Must be called | |
1141 | with SIGCHLD blocked. */ | |
1142 | void | |
0628567a JA |
1143 | delete_job (job_index, dflags) |
1144 | int job_index, dflags; | |
726f6388 JA |
1145 | { |
1146 | register JOB *temp; | |
95732b49 | 1147 | PROCESS *proc; |
0628567a | 1148 | int ndel; |
726f6388 | 1149 | |
95732b49 | 1150 | if (js.j_jobslots == 0 || jobs_list_frozen) |
726f6388 JA |
1151 | return; |
1152 | ||
0628567a | 1153 | if ((dflags & DEL_WARNSTOPPED) && subshell_environment == 0 && STOPPED (job_index)) |
b80f6443 | 1154 | internal_warning (_("deleting stopped job %d with process group %ld"), job_index+1, (long)jobs[job_index]->pgrp); |
726f6388 | 1155 | temp = jobs[job_index]; |
0628567a JA |
1156 | if (temp == 0) |
1157 | return; | |
726f6388 | 1158 | |
a0c0a00f | 1159 | if ((dflags & DEL_NOBGPID) == 0 && (temp->flags & (J_ASYNC|J_FOREGROUND)) == J_ASYNC) |
0628567a JA |
1160 | { |
1161 | proc = find_last_proc (job_index, 0); | |
0628567a JA |
1162 | if (proc) |
1163 | bgp_add (proc->pid, process_exit_status (proc->status)); | |
1164 | } | |
95732b49 | 1165 | |
726f6388 | 1166 | jobs[job_index] = (JOB *)NULL; |
95732b49 JA |
1167 | if (temp == js.j_lastmade) |
1168 | js.j_lastmade = 0; | |
1169 | else if (temp == js.j_lastasync) | |
1170 | js.j_lastasync = 0; | |
1171 | ||
726f6388 | 1172 | free (temp->wd); |
95732b49 JA |
1173 | ndel = discard_pipeline (temp->pipe); |
1174 | ||
1175 | js.c_injobs -= ndel; | |
1176 | if (temp->state == JDEAD) | |
1177 | { | |
1178 | js.c_reaped -= ndel; | |
1179 | js.j_ndead--; | |
1180 | if (js.c_reaped < 0) | |
1181 | { | |
1182 | #ifdef DEBUG | |
1183 | itrace("delete_job (%d pgrp %d): js.c_reaped (%d) < 0 ndel = %d js.j_ndead = %d", job_index, temp->pgrp, js.c_reaped, ndel, js.j_ndead); | |
1184 | #endif | |
1185 | js.c_reaped = 0; | |
1186 | } | |
1187 | } | |
726f6388 JA |
1188 | |
1189 | if (temp->deferred) | |
1190 | dispose_command (temp->deferred); | |
1191 | ||
1192 | free (temp); | |
95732b49 JA |
1193 | |
1194 | js.j_njobs--; | |
1195 | if (js.j_njobs == 0) | |
1196 | js.j_firstj = js.j_lastj = 0; | |
1197 | else if (jobs[js.j_firstj] == 0 || jobs[js.j_lastj] == 0) | |
1198 | reset_job_indices (); | |
f1be666c JA |
1199 | |
1200 | if (job_index == js.j_current || job_index == js.j_previous) | |
1201 | reset_current (); | |
726f6388 JA |
1202 | } |
1203 | ||
ccc6cda3 JA |
1204 | /* Must be called with SIGCHLD blocked. */ |
1205 | void | |
1206 | nohup_job (job_index) | |
1207 | int job_index; | |
1208 | { | |
1209 | register JOB *temp; | |
1210 | ||
95732b49 | 1211 | if (js.j_jobslots == 0) |
cce855bc JA |
1212 | return; |
1213 | ||
d166f048 | 1214 | if (temp = jobs[job_index]) |
ccc6cda3 JA |
1215 | temp->flags |= J_NOHUP; |
1216 | } | |
1217 | ||
726f6388 | 1218 | /* Get rid of the data structure associated with a process chain. */ |
a0c0a00f | 1219 | int |
726f6388 JA |
1220 | discard_pipeline (chain) |
1221 | register PROCESS *chain; | |
1222 | { | |
1223 | register PROCESS *this, *next; | |
95732b49 | 1224 | int n; |
726f6388 JA |
1225 | |
1226 | this = chain; | |
95732b49 | 1227 | n = 0; |
726f6388 JA |
1228 | do |
1229 | { | |
1230 | next = this->next; | |
ccc6cda3 | 1231 | FREE (this->command); |
726f6388 | 1232 | free (this); |
95732b49 | 1233 | n++; |
726f6388 JA |
1234 | this = next; |
1235 | } | |
1236 | while (this != chain); | |
95732b49 JA |
1237 | |
1238 | return n; | |
726f6388 JA |
1239 | } |
1240 | ||
1241 | /* Add this process to the chain being built in the_pipeline. | |
1242 | NAME is the command string that will be exec'ed later. | |
1243 | PID is the process id of the child. */ | |
1244 | static void | |
1245 | add_process (name, pid) | |
1246 | char *name; | |
1247 | pid_t pid; | |
1248 | { | |
ccc6cda3 | 1249 | PROCESS *t, *p; |
726f6388 | 1250 | |
95732b49 JA |
1251 | #if defined (RECYCLES_PIDS) |
1252 | int j; | |
1253 | p = find_process (pid, 0, &j); | |
1254 | if (p) | |
1255 | { | |
1256 | # ifdef DEBUG | |
1257 | if (j == NO_JOB) | |
3185942a | 1258 | internal_warning (_("add_process: process %5ld (%s) in the_pipeline"), (long)p->pid, p->command); |
95732b49 JA |
1259 | # endif |
1260 | if (PALIVE (p)) | |
3185942a | 1261 | internal_warning (_("add_process: pid %5ld (%s) marked as still alive"), (long)p->pid, p->command); |
95732b49 JA |
1262 | p->running = PS_RECYCLED; /* mark as recycled */ |
1263 | } | |
1264 | #endif | |
1265 | ||
ccc6cda3 | 1266 | t = (PROCESS *)xmalloc (sizeof (PROCESS)); |
726f6388 JA |
1267 | t->next = the_pipeline; |
1268 | t->pid = pid; | |
1269 | WSTATUS (t->status) = 0; | |
7117c2d2 | 1270 | t->running = PS_RUNNING; |
726f6388 JA |
1271 | t->command = name; |
1272 | the_pipeline = t; | |
1273 | ||
ccc6cda3 | 1274 | if (t->next == 0) |
726f6388 JA |
1275 | t->next = t; |
1276 | else | |
1277 | { | |
ccc6cda3 | 1278 | p = t->next; |
726f6388 JA |
1279 | while (p->next != t->next) |
1280 | p = p->next; | |
1281 | p->next = t; | |
1282 | } | |
1283 | } | |
1284 | ||
495aee44 CR |
1285 | /* Create a (dummy) PROCESS with NAME, PID, and STATUS, and make it the last |
1286 | process in jobs[JID]->pipe. Used by the lastpipe code. */ | |
1287 | void | |
1288 | append_process (name, pid, status, jid) | |
1289 | char *name; | |
1290 | pid_t pid; | |
1291 | int status; | |
1292 | int jid; | |
1293 | { | |
1294 | PROCESS *t, *p; | |
1295 | ||
1296 | t = (PROCESS *)xmalloc (sizeof (PROCESS)); | |
1297 | t->next = (PROCESS *)NULL; | |
1298 | t->pid = pid; | |
1299 | /* set process exit status using offset discovered by configure */ | |
1300 | t->status = (status & 0xff) << WEXITSTATUS_OFFSET; | |
1301 | t->running = PS_DONE; | |
1302 | t->command = name; | |
1303 | ||
1304 | js.c_reaped++; /* XXX */ | |
1305 | ||
1306 | for (p = jobs[jid]->pipe; p->next != jobs[jid]->pipe; p = p->next) | |
1307 | ; | |
1308 | p->next = t; | |
1309 | t->next = jobs[jid]->pipe; | |
1310 | } | |
1311 | ||
726f6388 JA |
1312 | #if 0 |
1313 | /* Take the last job and make it the first job. Must be called with | |
1314 | SIGCHLD blocked. */ | |
ccc6cda3 | 1315 | int |
726f6388 JA |
1316 | rotate_the_pipeline () |
1317 | { | |
1318 | PROCESS *p; | |
1319 | ||
1320 | if (the_pipeline->next == the_pipeline) | |
1321 | return; | |
1322 | for (p = the_pipeline; p->next != the_pipeline; p = p->next) | |
1323 | ; | |
1324 | the_pipeline = p; | |
1325 | } | |
1326 | ||
1327 | /* Reverse the order of the processes in the_pipeline. Must be called with | |
1328 | SIGCHLD blocked. */ | |
ccc6cda3 | 1329 | int |
726f6388 JA |
1330 | reverse_the_pipeline () |
1331 | { | |
1332 | PROCESS *p, *n; | |
1333 | ||
1334 | if (the_pipeline->next == the_pipeline) | |
1335 | return; | |
1336 | ||
1337 | for (p = the_pipeline; p->next != the_pipeline; p = p->next) | |
1338 | ; | |
1339 | p->next = (PROCESS *)NULL; | |
1340 | ||
1341 | n = REVERSE_LIST (the_pipeline, PROCESS *); | |
1342 | ||
1343 | the_pipeline = n; | |
1344 | for (p = the_pipeline; p->next; p = p->next) | |
1345 | ; | |
1346 | p->next = the_pipeline; | |
1347 | } | |
1348 | #endif | |
1349 | ||
1350 | /* Map FUNC over the list of jobs. If FUNC returns non-zero, | |
1351 | then it is time to stop mapping, and that is the return value | |
1352 | for map_over_jobs. FUNC is called with a JOB, arg1, arg2, | |
1353 | and INDEX. */ | |
1354 | static int | |
1355 | map_over_jobs (func, arg1, arg2) | |
f73dda09 | 1356 | sh_job_map_func_t *func; |
726f6388 JA |
1357 | int arg1, arg2; |
1358 | { | |
1359 | register int i; | |
1360 | int result; | |
1361 | sigset_t set, oset; | |
1362 | ||
95732b49 | 1363 | if (js.j_jobslots == 0) |
28ef6c31 JA |
1364 | return 0; |
1365 | ||
726f6388 | 1366 | BLOCK_CHILD (set, oset); |
726f6388 | 1367 | |
95732b49 JA |
1368 | /* XXX could use js.j_firstj here */ |
1369 | for (i = result = 0; i < js.j_jobslots; i++) | |
726f6388 | 1370 | { |
95732b49 JA |
1371 | #if defined (DEBUG) |
1372 | if (i < js.j_firstj && jobs[i]) | |
1373 | itrace("map_over_jobs: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
0628567a JA |
1374 | if (i > js.j_lastj && jobs[i]) |
1375 | itrace("map_over_jobs: job %d non-null after js.j_lastj (%d)", i, js.j_lastj); | |
95732b49 | 1376 | #endif |
726f6388 JA |
1377 | if (jobs[i]) |
1378 | { | |
1379 | result = (*func)(jobs[i], arg1, arg2, i); | |
1380 | if (result) | |
1381 | break; | |
1382 | } | |
1383 | } | |
1384 | ||
1385 | UNBLOCK_CHILD (oset); | |
ccc6cda3 | 1386 | |
726f6388 JA |
1387 | return (result); |
1388 | } | |
1389 | ||
1390 | /* Cause all the jobs in the current pipeline to exit. */ | |
1391 | void | |
1392 | terminate_current_pipeline () | |
1393 | { | |
1394 | if (pipeline_pgrp && pipeline_pgrp != shell_pgrp) | |
1395 | { | |
1396 | killpg (pipeline_pgrp, SIGTERM); | |
1397 | killpg (pipeline_pgrp, SIGCONT); | |
1398 | } | |
1399 | } | |
1400 | ||
1401 | /* Cause all stopped jobs to exit. */ | |
1402 | void | |
1403 | terminate_stopped_jobs () | |
1404 | { | |
1405 | register int i; | |
1406 | ||
95732b49 JA |
1407 | /* XXX could use js.j_firstj here */ |
1408 | for (i = 0; i < js.j_jobslots; i++) | |
726f6388 | 1409 | { |
ccc6cda3 | 1410 | if (jobs[i] && STOPPED (i)) |
726f6388 JA |
1411 | { |
1412 | killpg (jobs[i]->pgrp, SIGTERM); | |
1413 | killpg (jobs[i]->pgrp, SIGCONT); | |
1414 | } | |
1415 | } | |
1416 | } | |
1417 | ||
ccc6cda3 JA |
1418 | /* Cause all jobs, running or stopped, to receive a hangup signal. If |
1419 | a job is marked J_NOHUP, don't send the SIGHUP. */ | |
726f6388 JA |
1420 | void |
1421 | hangup_all_jobs () | |
1422 | { | |
1423 | register int i; | |
1424 | ||
95732b49 JA |
1425 | /* XXX could use js.j_firstj here */ |
1426 | for (i = 0; i < js.j_jobslots; i++) | |
726f6388 JA |
1427 | { |
1428 | if (jobs[i]) | |
1429 | { | |
0628567a JA |
1430 | if (jobs[i]->flags & J_NOHUP) |
1431 | continue; | |
1432 | killpg (jobs[i]->pgrp, SIGHUP); | |
ccc6cda3 | 1433 | if (STOPPED (i)) |
726f6388 JA |
1434 | killpg (jobs[i]->pgrp, SIGCONT); |
1435 | } | |
1436 | } | |
1437 | } | |
1438 | ||
1439 | void | |
1440 | kill_current_pipeline () | |
1441 | { | |
1442 | stop_making_children (); | |
1443 | start_pipeline (); | |
1444 | } | |
1445 | ||
1446 | /* Return the pipeline that PID belongs to. Note that the pipeline | |
95732b49 JA |
1447 | doesn't have to belong to a job. Must be called with SIGCHLD blocked. |
1448 | If JOBP is non-null, return the index of the job containing PID. */ | |
726f6388 | 1449 | static PROCESS * |
95732b49 | 1450 | find_pipeline (pid, alive_only, jobp) |
726f6388 | 1451 | pid_t pid; |
95732b49 | 1452 | int alive_only; |
7117c2d2 | 1453 | int *jobp; /* index into jobs list or NO_JOB */ |
726f6388 JA |
1454 | { |
1455 | int job; | |
95732b49 | 1456 | PROCESS *p; |
726f6388 JA |
1457 | |
1458 | /* See if this process is in the pipeline that we are building. */ | |
7117c2d2 JA |
1459 | if (jobp) |
1460 | *jobp = NO_JOB; | |
726f6388 JA |
1461 | if (the_pipeline) |
1462 | { | |
ccc6cda3 | 1463 | p = the_pipeline; |
726f6388 JA |
1464 | do |
1465 | { | |
95732b49 JA |
1466 | /* Return it if we found it. Don't ever return a recycled pid. */ |
1467 | if (p->pid == pid && ((alive_only == 0 && PRECYCLED(p) == 0) || PALIVE(p))) | |
1468 | return (p); | |
726f6388 JA |
1469 | |
1470 | p = p->next; | |
1471 | } | |
1472 | while (p != the_pipeline); | |
1473 | } | |
a0c0a00f CR |
1474 | /* Now look in the last process substitution pipeline, since that sets $! */ |
1475 | if (last_procsub_child) | |
1476 | { | |
1477 | p = last_procsub_child; | |
1478 | do | |
1479 | { | |
1480 | /* Return it if we found it. Don't ever return a recycled pid. */ | |
1481 | if (p->pid == pid && ((alive_only == 0 && PRECYCLED(p) == 0) || PALIVE(p))) | |
1482 | return (p); | |
1483 | ||
1484 | p = p->next; | |
1485 | } | |
1486 | while (p != last_procsub_child); | |
1487 | } | |
726f6388 | 1488 | |
95732b49 | 1489 | job = find_job (pid, alive_only, &p); |
7117c2d2 JA |
1490 | if (jobp) |
1491 | *jobp = job; | |
ccc6cda3 | 1492 | return (job == NO_JOB) ? (PROCESS *)NULL : jobs[job]->pipe; |
726f6388 JA |
1493 | } |
1494 | ||
95732b49 JA |
1495 | /* Return the PROCESS * describing PID. If JOBP is non-null return the index |
1496 | into the jobs array of the job containing PID. Must be called with | |
1497 | SIGCHLD blocked. */ | |
1498 | static PROCESS * | |
1499 | find_process (pid, alive_only, jobp) | |
1500 | pid_t pid; | |
1501 | int alive_only; | |
1502 | int *jobp; /* index into jobs list or NO_JOB */ | |
1503 | { | |
1504 | PROCESS *p; | |
1505 | ||
1506 | p = find_pipeline (pid, alive_only, jobp); | |
1507 | while (p && p->pid != pid) | |
1508 | p = p->next; | |
1509 | return p; | |
1510 | } | |
1511 | ||
726f6388 JA |
1512 | /* Return the job index that PID belongs to, or NO_JOB if it doesn't |
1513 | belong to any job. Must be called with SIGCHLD blocked. */ | |
1514 | static int | |
95732b49 | 1515 | find_job (pid, alive_only, procp) |
726f6388 | 1516 | pid_t pid; |
95732b49 JA |
1517 | int alive_only; |
1518 | PROCESS **procp; | |
726f6388 JA |
1519 | { |
1520 | register int i; | |
95732b49 | 1521 | PROCESS *p; |
726f6388 | 1522 | |
0628567a | 1523 | /* XXX could use js.j_firstj here, and should check js.j_lastj */ |
95732b49 | 1524 | for (i = 0; i < js.j_jobslots; i++) |
726f6388 | 1525 | { |
95732b49 JA |
1526 | #if defined (DEBUG) |
1527 | if (i < js.j_firstj && jobs[i]) | |
1528 | itrace("find_job: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
0628567a JA |
1529 | if (i > js.j_lastj && jobs[i]) |
1530 | itrace("find_job: job %d non-null after js.j_lastj (%d)", i, js.j_lastj); | |
95732b49 | 1531 | #endif |
726f6388 JA |
1532 | if (jobs[i]) |
1533 | { | |
1534 | p = jobs[i]->pipe; | |
1535 | ||
1536 | do | |
1537 | { | |
95732b49 | 1538 | if (p->pid == pid && ((alive_only == 0 && PRECYCLED(p) == 0) || PALIVE(p))) |
7117c2d2 | 1539 | { |
95732b49 JA |
1540 | if (procp) |
1541 | *procp = p; | |
1542 | return (i); | |
7117c2d2 | 1543 | } |
726f6388 JA |
1544 | |
1545 | p = p->next; | |
1546 | } | |
1547 | while (p != jobs[i]->pipe); | |
1548 | } | |
1549 | } | |
1550 | ||
1551 | return (NO_JOB); | |
1552 | } | |
1553 | ||
d166f048 JA |
1554 | /* Find a job given a PID. If BLOCK is non-zero, block SIGCHLD as |
1555 | required by find_job. */ | |
1556 | int | |
1557 | get_job_by_pid (pid, block) | |
1558 | pid_t pid; | |
1559 | int block; | |
1560 | { | |
1561 | int job; | |
1562 | sigset_t set, oset; | |
1563 | ||
1564 | if (block) | |
1565 | BLOCK_CHILD (set, oset); | |
7117c2d2 | 1566 | |
95732b49 | 1567 | job = find_job (pid, 0, NULL); |
7117c2d2 | 1568 | |
d166f048 JA |
1569 | if (block) |
1570 | UNBLOCK_CHILD (oset); | |
1571 | ||
1572 | return job; | |
1573 | } | |
1574 | ||
726f6388 JA |
1575 | /* Print descriptive information about the job with leader pid PID. */ |
1576 | void | |
1577 | describe_pid (pid) | |
1578 | pid_t pid; | |
1579 | { | |
1580 | int job; | |
1581 | sigset_t set, oset; | |
1582 | ||
1583 | BLOCK_CHILD (set, oset); | |
1584 | ||
95732b49 | 1585 | job = find_job (pid, 0, NULL); |
726f6388 JA |
1586 | |
1587 | if (job != NO_JOB) | |
95732b49 | 1588 | fprintf (stderr, "[%d] %ld\n", job + 1, (long)pid); |
726f6388 | 1589 | else |
b80f6443 | 1590 | programming_error (_("describe_pid: %ld: no such pid"), (long)pid); |
726f6388 JA |
1591 | |
1592 | UNBLOCK_CHILD (oset); | |
1593 | } | |
1594 | ||
b80f6443 JA |
1595 | static char * |
1596 | j_strsignal (s) | |
1597 | int s; | |
1598 | { | |
1599 | char *x; | |
1600 | ||
1601 | x = strsignal (s); | |
1602 | if (x == 0) | |
1603 | { | |
1604 | x = retcode_name_buffer; | |
a0c0a00f | 1605 | snprintf (x, sizeof(retcode_name_buffer), _("Signal %d"), s); |
b80f6443 JA |
1606 | } |
1607 | return x; | |
1608 | } | |
1609 | ||
28ef6c31 JA |
1610 | static char * |
1611 | printable_job_status (j, p, format) | |
1612 | int j; | |
1613 | PROCESS *p; | |
1614 | int format; | |
1615 | { | |
1616 | static char *temp; | |
1617 | int es; | |
1618 | ||
3185942a | 1619 | temp = _("Done"); |
28ef6c31 JA |
1620 | |
1621 | if (STOPPED (j) && format == 0) | |
1622 | { | |
1623 | if (posixly_correct == 0 || p == 0 || (WIFSTOPPED (p->status) == 0)) | |
3185942a | 1624 | temp = _("Stopped"); |
28ef6c31 JA |
1625 | else |
1626 | { | |
1627 | temp = retcode_name_buffer; | |
a0c0a00f | 1628 | snprintf (temp, sizeof(retcode_name_buffer), _("Stopped(%s)"), signal_name (WSTOPSIG (p->status))); |
28ef6c31 JA |
1629 | } |
1630 | } | |
1631 | else if (RUNNING (j)) | |
3185942a | 1632 | temp = _("Running"); |
28ef6c31 JA |
1633 | else |
1634 | { | |
1635 | if (WIFSTOPPED (p->status)) | |
b80f6443 | 1636 | temp = j_strsignal (WSTOPSIG (p->status)); |
28ef6c31 | 1637 | else if (WIFSIGNALED (p->status)) |
b80f6443 | 1638 | temp = j_strsignal (WTERMSIG (p->status)); |
28ef6c31 JA |
1639 | else if (WIFEXITED (p->status)) |
1640 | { | |
1641 | temp = retcode_name_buffer; | |
1642 | es = WEXITSTATUS (p->status); | |
1643 | if (es == 0) | |
a0c0a00f CR |
1644 | { |
1645 | strncpy (temp, _("Done"), sizeof (retcode_name_buffer) - 1); | |
1646 | temp[sizeof (retcode_name_buffer) - 1] = '\0'; | |
1647 | } | |
28ef6c31 | 1648 | else if (posixly_correct) |
a0c0a00f | 1649 | snprintf (temp, sizeof(retcode_name_buffer), _("Done(%d)"), es); |
28ef6c31 | 1650 | else |
a0c0a00f | 1651 | snprintf (temp, sizeof(retcode_name_buffer), _("Exit %d"), es); |
28ef6c31 JA |
1652 | } |
1653 | else | |
3185942a | 1654 | temp = _("Unknown status"); |
28ef6c31 JA |
1655 | } |
1656 | ||
1657 | return temp; | |
1658 | } | |
1659 | ||
726f6388 JA |
1660 | /* This is the way to print out information on a job if you |
1661 | know the index. FORMAT is: | |
1662 | ||
1663 | JLIST_NORMAL) [1]+ Running emacs | |
1664 | JLIST_LONG ) [1]+ 2378 Running emacs | |
1665 | -1 ) [1]+ 2378 emacs | |
1666 | ||
1667 | JLIST_NORMAL) [1]+ Stopped ls | more | |
1668 | JLIST_LONG ) [1]+ 2369 Stopped ls | |
1669 | 2367 | more | |
1670 | JLIST_PID_ONLY) | |
1671 | Just list the pid of the process group leader (really | |
1672 | the process group). | |
1673 | JLIST_CHANGED_ONLY) | |
1674 | Use format JLIST_NORMAL, but list only jobs about which | |
1675 | the user has not been notified. */ | |
ccc6cda3 JA |
1676 | |
1677 | /* Print status for pipeline P. If JOB_INDEX is >= 0, it is the index into | |
1678 | the JOBS array corresponding to this pipeline. FORMAT is as described | |
1679 | above. Must be called with SIGCHLD blocked. | |
1680 | ||
1681 | If you're printing a pipeline that's not in the jobs array, like the | |
1682 | current pipeline as it's being created, pass -1 for JOB_INDEX */ | |
726f6388 | 1683 | static void |
ccc6cda3 JA |
1684 | print_pipeline (p, job_index, format, stream) |
1685 | PROCESS *p; | |
726f6388 JA |
1686 | int job_index, format; |
1687 | FILE *stream; | |
1688 | { | |
ccc6cda3 JA |
1689 | PROCESS *first, *last, *show; |
1690 | int es, name_padding; | |
28ef6c31 | 1691 | char *temp; |
726f6388 | 1692 | |
ccc6cda3 JA |
1693 | if (p == 0) |
1694 | return; | |
726f6388 | 1695 | |
ccc6cda3 | 1696 | first = last = p; |
726f6388 JA |
1697 | while (last->next != first) |
1698 | last = last->next; | |
1699 | ||
726f6388 JA |
1700 | for (;;) |
1701 | { | |
1702 | if (p != first) | |
1703 | fprintf (stream, format ? " " : " |"); | |
1704 | ||
ccc6cda3 | 1705 | if (format != JLIST_STANDARD) |
f73dda09 | 1706 | fprintf (stream, "%5ld", (long)p->pid); |
726f6388 JA |
1707 | |
1708 | fprintf (stream, " "); | |
1709 | ||
ccc6cda3 | 1710 | if (format > -1 && job_index >= 0) |
726f6388 | 1711 | { |
ccc6cda3 | 1712 | show = format ? p : last; |
28ef6c31 | 1713 | temp = printable_job_status (job_index, show, format); |
726f6388 JA |
1714 | |
1715 | if (p != first) | |
1716 | { | |
1717 | if (format) | |
1718 | { | |
1719 | if (show->running == first->running && | |
1720 | WSTATUS (show->status) == WSTATUS (first->status)) | |
1721 | temp = ""; | |
1722 | } | |
1723 | else | |
1724 | temp = (char *)NULL; | |
1725 | } | |
1726 | ||
1727 | if (temp) | |
1728 | { | |
726f6388 JA |
1729 | fprintf (stream, "%s", temp); |
1730 | ||
ccc6cda3 JA |
1731 | es = STRLEN (temp); |
1732 | if (es == 0) | |
28ef6c31 | 1733 | es = 2; /* strlen ("| ") */ |
ccc6cda3 | 1734 | name_padding = LONGEST_SIGNAL_DESC - es; |
726f6388 JA |
1735 | |
1736 | fprintf (stream, "%*s", name_padding, ""); | |
1737 | ||
f73dda09 JA |
1738 | if ((WIFSTOPPED (show->status) == 0) && |
1739 | (WIFCONTINUED (show->status) == 0) && | |
1740 | WIFCORED (show->status)) | |
3185942a | 1741 | fprintf (stream, _("(core dumped) ")); |
726f6388 JA |
1742 | } |
1743 | } | |
1744 | ||
1745 | if (p != first && format) | |
1746 | fprintf (stream, "| "); | |
1747 | ||
1748 | if (p->command) | |
1749 | fprintf (stream, "%s", p->command); | |
1750 | ||
ccc6cda3 | 1751 | if (p == last && job_index >= 0) |
726f6388 | 1752 | { |
ccc6cda3 | 1753 | temp = current_working_directory (); |
726f6388 | 1754 | |
ccc6cda3 | 1755 | if (RUNNING (job_index) && (IS_FOREGROUND (job_index) == 0)) |
726f6388 JA |
1756 | fprintf (stream, " &"); |
1757 | ||
ccc6cda3 | 1758 | if (strcmp (temp, jobs[job_index]->wd) != 0) |
726f6388 | 1759 | fprintf (stream, |
3185942a | 1760 | _(" (wd: %s)"), polite_directory_format (jobs[job_index]->wd)); |
726f6388 JA |
1761 | } |
1762 | ||
1763 | if (format || (p == last)) | |
cce855bc JA |
1764 | { |
1765 | /* We need to add a CR only if this is an interactive shell, and | |
1766 | we're reporting the status of a completed job asynchronously. | |
1767 | We can't really check whether this particular job is being | |
1768 | reported asynchronously, so just add the CR if the shell is | |
1769 | currently interactive and asynchronous notification is enabled. */ | |
1770 | if (asynchronous_notification && interactive) | |
1771 | fprintf (stream, "\r\n"); | |
1772 | else | |
1773 | fprintf (stream, "\n"); | |
1774 | } | |
726f6388 JA |
1775 | |
1776 | if (p == last) | |
1777 | break; | |
1778 | p = p->next; | |
1779 | } | |
726f6388 | 1780 | fflush (stream); |
ccc6cda3 JA |
1781 | } |
1782 | ||
7117c2d2 JA |
1783 | /* Print information to STREAM about jobs[JOB_INDEX] according to FORMAT. |
1784 | Must be called with SIGCHLD blocked or queued with queue_sigchld */ | |
ccc6cda3 JA |
1785 | static void |
1786 | pretty_print_job (job_index, format, stream) | |
1787 | int job_index, format; | |
1788 | FILE *stream; | |
1789 | { | |
1790 | register PROCESS *p; | |
ccc6cda3 JA |
1791 | |
1792 | /* Format only pid information about the process group leader? */ | |
1793 | if (format == JLIST_PID_ONLY) | |
1794 | { | |
f73dda09 | 1795 | fprintf (stream, "%ld\n", (long)jobs[job_index]->pipe->pid); |
ccc6cda3 JA |
1796 | return; |
1797 | } | |
1798 | ||
1799 | if (format == JLIST_CHANGED_ONLY) | |
1800 | { | |
1801 | if (IS_NOTIFIED (job_index)) | |
7117c2d2 | 1802 | return; |
ccc6cda3 JA |
1803 | format = JLIST_STANDARD; |
1804 | } | |
1805 | ||
1806 | if (format != JLIST_NONINTERACTIVE) | |
1807 | fprintf (stream, "[%d]%c ", job_index + 1, | |
95732b49 JA |
1808 | (job_index == js.j_current) ? '+': |
1809 | (job_index == js.j_previous) ? '-' : ' '); | |
ccc6cda3 JA |
1810 | |
1811 | if (format == JLIST_NONINTERACTIVE) | |
1812 | format = JLIST_LONG; | |
1813 | ||
1814 | p = jobs[job_index]->pipe; | |
1815 | ||
cce855bc JA |
1816 | print_pipeline (p, job_index, format, stream); |
1817 | ||
ccc6cda3 JA |
1818 | /* We have printed information about this job. When the job's |
1819 | status changes, waitchld () sets the notification flag to 0. */ | |
1820 | jobs[job_index]->flags |= J_NOTIFIED; | |
726f6388 JA |
1821 | } |
1822 | ||
ccc6cda3 JA |
1823 | static int |
1824 | print_job (job, format, state, job_index) | |
1825 | JOB *job; | |
1826 | int format, state, job_index; | |
1827 | { | |
1828 | if (state == -1 || (JOB_STATE)state == job->state) | |
1829 | pretty_print_job (job_index, format, stdout); | |
1830 | return (0); | |
1831 | } | |
1832 | ||
1833 | void | |
726f6388 JA |
1834 | list_one_job (job, format, ignore, job_index) |
1835 | JOB *job; | |
1836 | int format, ignore, job_index; | |
1837 | { | |
7117c2d2 | 1838 | pretty_print_job (job_index, format, stdout); |
ccc6cda3 JA |
1839 | } |
1840 | ||
1841 | void | |
1842 | list_stopped_jobs (format) | |
1843 | int format; | |
1844 | { | |
1845 | cleanup_dead_jobs (); | |
1846 | map_over_jobs (print_job, format, (int)JSTOPPED); | |
1847 | } | |
1848 | ||
1849 | void | |
1850 | list_running_jobs (format) | |
1851 | int format; | |
1852 | { | |
1853 | cleanup_dead_jobs (); | |
1854 | map_over_jobs (print_job, format, (int)JRUNNING); | |
726f6388 JA |
1855 | } |
1856 | ||
1857 | /* List jobs. If FORMAT is non-zero, then the long form of the information | |
1858 | is printed, else just a short version. */ | |
1859 | void | |
ccc6cda3 | 1860 | list_all_jobs (format) |
726f6388 JA |
1861 | int format; |
1862 | { | |
1863 | cleanup_dead_jobs (); | |
ccc6cda3 | 1864 | map_over_jobs (print_job, format, -1); |
726f6388 JA |
1865 | } |
1866 | ||
1867 | /* Fork, handling errors. Returns the pid of the newly made child, or 0. | |
1868 | COMMAND is just for remembering the name of the command; we don't do | |
1869 | anything else with it. ASYNC_P says what to do with the tty. If | |
1870 | non-zero, then don't give it away. */ | |
1871 | pid_t | |
1872 | make_child (command, async_p) | |
1873 | char *command; | |
1874 | int async_p; | |
1875 | { | |
3185942a | 1876 | int forksleep; |
726f6388 JA |
1877 | sigset_t set, oset; |
1878 | pid_t pid; | |
1879 | ||
ac50fbac CR |
1880 | /* XXX - block SIGTERM here and unblock in child after fork resets the |
1881 | set of pending signals? */ | |
726f6388 JA |
1882 | sigemptyset (&set); |
1883 | sigaddset (&set, SIGCHLD); | |
1884 | sigaddset (&set, SIGINT); | |
1885 | sigemptyset (&oset); | |
1886 | sigprocmask (SIG_BLOCK, &set, &oset); | |
1887 | ||
1888 | making_children (); | |
1889 | ||
3185942a JA |
1890 | forksleep = 1; |
1891 | ||
726f6388 JA |
1892 | #if defined (BUFFERED_INPUT) |
1893 | /* If default_buffered_input is active, we are reading a script. If | |
1894 | the command is asynchronous, we have already duplicated /dev/null | |
1895 | as fd 0, but have not changed the buffered stream corresponding to | |
1896 | the old fd 0. We don't want to sync the stream in this case. */ | |
1897 | if (default_buffered_input != -1 && | |
1898 | (!async_p || default_buffered_input > 0)) | |
1899 | sync_buffered_stream (default_buffered_input); | |
1900 | #endif /* BUFFERED_INPUT */ | |
1901 | ||
ac50fbac CR |
1902 | RESET_SIGTERM; |
1903 | ||
3185942a JA |
1904 | /* Create the child, handle severe errors. Retry on EAGAIN. */ |
1905 | while ((pid = fork ()) < 0 && errno == EAGAIN && forksleep < FORKSLEEP_MAX) | |
1906 | { | |
495aee44 | 1907 | /* bash-4.2 */ |
a0c0a00f | 1908 | sigprocmask (SIG_SETMASK, &oset, (sigset_t *)NULL); |
0001803f CR |
1909 | /* If we can't create any children, try to reap some dead ones. */ |
1910 | waitchld (-1, 0); | |
495aee44 | 1911 | |
a0c0a00f | 1912 | errno = EAGAIN; /* restore errno */ |
3185942a | 1913 | sys_error ("fork: retry"); |
ac50fbac CR |
1914 | RESET_SIGTERM; |
1915 | ||
3185942a JA |
1916 | if (sleep (forksleep) != 0) |
1917 | break; | |
1918 | forksleep <<= 1; | |
a0c0a00f CR |
1919 | |
1920 | if (interrupt_state) | |
1921 | break; | |
1922 | sigprocmask (SIG_SETMASK, &set, (sigset_t *)NULL); | |
3185942a JA |
1923 | } |
1924 | ||
ac50fbac CR |
1925 | if (pid != 0) |
1926 | RESET_SIGTERM; | |
1927 | ||
3185942a | 1928 | if (pid < 0) |
726f6388 | 1929 | { |
ccc6cda3 | 1930 | sys_error ("fork"); |
726f6388 JA |
1931 | |
1932 | /* Kill all of the processes in the current pipeline. */ | |
1933 | terminate_current_pipeline (); | |
1934 | ||
1935 | /* Discard the current pipeline, if any. */ | |
1936 | if (the_pipeline) | |
1937 | kill_current_pipeline (); | |
1938 | ||
0001803f | 1939 | last_command_exit_value = EX_NOEXEC; |
726f6388 JA |
1940 | throw_to_top_level (); /* Reset signals, etc. */ |
1941 | } | |
1942 | ||
1943 | if (pid == 0) | |
1944 | { | |
1945 | /* In the child. Give this child the right process group, set the | |
1946 | signals to the default state for a new process. */ | |
b72432fd | 1947 | pid_t mypid; |
726f6388 | 1948 | |
b72432fd | 1949 | mypid = getpid (); |
726f6388 JA |
1950 | #if defined (BUFFERED_INPUT) |
1951 | /* Close default_buffered_input if it's > 0. We don't close it if it's | |
1952 | 0 because that's the file descriptor used when redirecting input, | |
1953 | and it's wrong to close the file in that case. */ | |
cce855bc | 1954 | unset_bash_input (0); |
726f6388 JA |
1955 | #endif /* BUFFERED_INPUT */ |
1956 | ||
a0c0a00f CR |
1957 | CLRINTERRUPT; /* XXX - children have their own interrupt state */ |
1958 | ||
726f6388 JA |
1959 | /* Restore top-level signal mask. */ |
1960 | sigprocmask (SIG_SETMASK, &top_level_mask, (sigset_t *)NULL); | |
1961 | ||
1962 | if (job_control) | |
1963 | { | |
1964 | /* All processes in this pipeline belong in the same | |
1965 | process group. */ | |
1966 | ||
ccc6cda3 | 1967 | if (pipeline_pgrp == 0) /* This is the first child. */ |
b72432fd | 1968 | pipeline_pgrp = mypid; |
726f6388 JA |
1969 | |
1970 | /* Check for running command in backquotes. */ | |
1971 | if (pipeline_pgrp == shell_pgrp) | |
ccc6cda3 | 1972 | ignore_tty_job_signals (); |
726f6388 | 1973 | else |
ccc6cda3 | 1974 | default_tty_job_signals (); |
726f6388 JA |
1975 | |
1976 | /* Set the process group before trying to mess with the terminal's | |
1977 | process group. This is mandated by POSIX. */ | |
1978 | /* This is in accordance with the Posix 1003.1 standard, | |
1979 | section B.7.2.4, which says that trying to set the terminal | |
1980 | process group with tcsetpgrp() to an unused pgrp value (like | |
1981 | this would have for the first child) is an error. Section | |
1982 | B.4.3.3, p. 237 also covers this, in the context of job control | |
1983 | shells. */ | |
b72432fd | 1984 | if (setpgid (mypid, pipeline_pgrp) < 0) |
3185942a | 1985 | sys_error (_("child setpgid (%ld to %ld)"), (long)mypid, (long)pipeline_pgrp); |
b80f6443 JA |
1986 | |
1987 | /* By convention (and assumption above), if | |
1988 | pipeline_pgrp == shell_pgrp, we are making a child for | |
1989 | command substitution. | |
1990 | In this case, we don't want to give the terminal to the | |
1991 | shell's process group (we could be in the middle of a | |
1992 | pipeline, for example). */ | |
a0c0a00f | 1993 | if (async_p == 0 && pipeline_pgrp != shell_pgrp && ((subshell_environment&(SUBSHELL_ASYNC|SUBSHELL_PIPE)) == 0) && running_in_background == 0) |
b80f6443 | 1994 | give_terminal_to (pipeline_pgrp, 0); |
726f6388 JA |
1995 | |
1996 | #if defined (PGRP_PIPE) | |
b80f6443 JA |
1997 | if (pipeline_pgrp == mypid) |
1998 | pipe_read (pgrp_pipe); | |
726f6388 JA |
1999 | #endif |
2000 | } | |
2001 | else /* Without job control... */ | |
2002 | { | |
ccc6cda3 | 2003 | if (pipeline_pgrp == 0) |
726f6388 JA |
2004 | pipeline_pgrp = shell_pgrp; |
2005 | ||
2006 | /* If these signals are set to SIG_DFL, we encounter the curious | |
2007 | situation of an interactive ^Z to a running process *working* | |
2008 | and stopping the process, but being unable to do anything with | |
2009 | that process to change its state. On the other hand, if they | |
2010 | are set to SIG_IGN, jobs started from scripts do not stop when | |
2011 | the shell running the script gets a SIGTSTP and stops. */ | |
2012 | ||
ccc6cda3 | 2013 | default_tty_job_signals (); |
726f6388 JA |
2014 | } |
2015 | ||
2016 | #if defined (PGRP_PIPE) | |
2017 | /* Release the process group pipe, since our call to setpgid () | |
3185942a JA |
2018 | is done. The last call to sh_closepipe is done in stop_pipeline. */ |
2019 | sh_closepipe (pgrp_pipe); | |
726f6388 JA |
2020 | #endif /* PGRP_PIPE */ |
2021 | ||
3185942a JA |
2022 | #if 0 |
2023 | /* Don't set last_asynchronous_pid in the child */ | |
726f6388 | 2024 | if (async_p) |
3185942a JA |
2025 | last_asynchronous_pid = mypid; /* XXX */ |
2026 | else | |
2027 | #endif | |
95732b49 | 2028 | #if defined (RECYCLES_PIDS) |
3185942a | 2029 | if (last_asynchronous_pid == mypid) |
95732b49 JA |
2030 | /* Avoid pid aliasing. 1 seems like a safe, unusual pid value. */ |
2031 | last_asynchronous_pid = 1; | |
2032 | #endif | |
726f6388 JA |
2033 | } |
2034 | else | |
2035 | { | |
2036 | /* In the parent. Remember the pid of the child just created | |
2037 | as the proper pgrp if this is the first child. */ | |
2038 | ||
2039 | if (job_control) | |
2040 | { | |
ccc6cda3 | 2041 | if (pipeline_pgrp == 0) |
726f6388 JA |
2042 | { |
2043 | pipeline_pgrp = pid; | |
2044 | /* Don't twiddle terminal pgrps in the parent! This is the bug, | |
2045 | not the good thing of twiddling them in the child! */ | |
28ef6c31 | 2046 | /* give_terminal_to (pipeline_pgrp, 0); */ |
726f6388 JA |
2047 | } |
2048 | /* This is done on the recommendation of the Rationale section of | |
2049 | the POSIX 1003.1 standard, where it discusses job control and | |
2050 | shells. It is done to avoid possible race conditions. (Ref. | |
2051 | 1003.1 Rationale, section B.4.3.3, page 236). */ | |
2052 | setpgid (pid, pipeline_pgrp); | |
2053 | } | |
2054 | else | |
2055 | { | |
ccc6cda3 | 2056 | if (pipeline_pgrp == 0) |
726f6388 JA |
2057 | pipeline_pgrp = shell_pgrp; |
2058 | } | |
2059 | ||
2060 | /* Place all processes into the jobs array regardless of the | |
2061 | state of job_control. */ | |
2062 | add_process (command, pid); | |
2063 | ||
2064 | if (async_p) | |
2065 | last_asynchronous_pid = pid; | |
95732b49 JA |
2066 | #if defined (RECYCLES_PIDS) |
2067 | else if (last_asynchronous_pid == pid) | |
2068 | /* Avoid pid aliasing. 1 seems like a safe, unusual pid value. */ | |
2069 | last_asynchronous_pid = 1; | |
2070 | #endif | |
2071 | ||
ac50fbac CR |
2072 | /* Delete the saved status for any job containing this PID in case it's |
2073 | been reused. */ | |
2074 | delete_old_job (pid); | |
0628567a | 2075 | |
ac50fbac CR |
2076 | /* Perform the check for pid reuse unconditionally. Some systems reuse |
2077 | PIDs before giving a process CHILD_MAX/_SC_CHILD_MAX unique ones. */ | |
2078 | bgp_delete (pid); /* new process, discard any saved status */ | |
726f6388 JA |
2079 | |
2080 | last_made_pid = pid; | |
2081 | ||
95732b49 JA |
2082 | /* keep stats */ |
2083 | js.c_totforked++; | |
2084 | js.c_living++; | |
2085 | ||
2086 | /* Unblock SIGINT and SIGCHLD unless creating a pipeline, in which case | |
2087 | SIGCHLD remains blocked until all commands in the pipeline have been | |
2088 | created. */ | |
726f6388 JA |
2089 | sigprocmask (SIG_SETMASK, &oset, (sigset_t *)NULL); |
2090 | } | |
2091 | ||
2092 | return (pid); | |
2093 | } | |
2094 | ||
7117c2d2 | 2095 | /* These two functions are called only in child processes. */ |
ccc6cda3 JA |
2096 | void |
2097 | ignore_tty_job_signals () | |
2098 | { | |
2099 | set_signal_handler (SIGTSTP, SIG_IGN); | |
2100 | set_signal_handler (SIGTTIN, SIG_IGN); | |
2101 | set_signal_handler (SIGTTOU, SIG_IGN); | |
2102 | } | |
2103 | ||
a0c0a00f CR |
2104 | /* Reset the tty-generated job control signals to SIG_DFL unless that signal |
2105 | was ignored at entry to the shell, in which case we need to set it to | |
2106 | SIG_IGN in the child. We can't rely on resetting traps, since the hard | |
2107 | ignored signals can't be trapped. */ | |
ccc6cda3 JA |
2108 | void |
2109 | default_tty_job_signals () | |
2110 | { | |
a0c0a00f CR |
2111 | if (signal_is_trapped (SIGTSTP) == 0 && signal_is_hard_ignored (SIGTSTP)) |
2112 | set_signal_handler (SIGTSTP, SIG_IGN); | |
2113 | else | |
2114 | set_signal_handler (SIGTSTP, SIG_DFL); | |
2115 | ||
2116 | if (signal_is_trapped (SIGTTIN) == 0 && signal_is_hard_ignored (SIGTTIN)) | |
2117 | set_signal_handler (SIGTTIN, SIG_IGN); | |
2118 | else | |
2119 | set_signal_handler (SIGTTIN, SIG_DFL); | |
2120 | ||
2121 | if (signal_is_trapped (SIGTTOU) == 0 && signal_is_hard_ignored (SIGTTOU)) | |
2122 | set_signal_handler (SIGTTOU, SIG_IGN); | |
2123 | else | |
2124 | set_signal_handler (SIGTTOU, SIG_DFL); | |
2125 | } | |
2126 | ||
2127 | /* Called once in a parent process. */ | |
2128 | void | |
2129 | get_original_tty_job_signals () | |
2130 | { | |
2131 | static int fetched = 0; | |
2132 | ||
2133 | if (fetched == 0) | |
2134 | { | |
2135 | if (interactive_shell) | |
2136 | { | |
2137 | set_original_signal (SIGTSTP, SIG_DFL); | |
2138 | set_original_signal (SIGTTIN, SIG_DFL); | |
2139 | set_original_signal (SIGTTOU, SIG_DFL); | |
2140 | } | |
2141 | else | |
2142 | { | |
2143 | get_original_signal (SIGTSTP); | |
2144 | get_original_signal (SIGTTIN); | |
2145 | get_original_signal (SIGTTOU); | |
2146 | } | |
2147 | fetched = 1; | |
2148 | } | |
ccc6cda3 JA |
2149 | } |
2150 | ||
726f6388 JA |
2151 | /* When we end a job abnormally, or if we stop a job, we set the tty to the |
2152 | state kept in here. When a job ends normally, we set the state in here | |
2153 | to the state of the tty. */ | |
2154 | ||
28ef6c31 JA |
2155 | static TTYSTRUCT shell_tty_info; |
2156 | ||
726f6388 | 2157 | #if defined (NEW_TTY_DRIVER) |
726f6388 JA |
2158 | static struct tchars shell_tchars; |
2159 | static struct ltchars shell_ltchars; | |
2160 | #endif /* NEW_TTY_DRIVER */ | |
2161 | ||
726f6388 JA |
2162 | #if defined (NEW_TTY_DRIVER) && defined (DRAIN_OUTPUT) |
2163 | /* Since the BSD tty driver does not allow us to change the tty modes | |
2164 | while simultaneously waiting for output to drain and preserving | |
2165 | typeahead, we have to drain the output ourselves before calling | |
2166 | ioctl. We cheat by finding the length of the output queue, and | |
2167 | using select to wait for an appropriate length of time. This is | |
2168 | a hack, and should be labeled as such (it's a hastily-adapted | |
2169 | mutation of a `usleep' implementation). It's only reason for | |
2170 | existing is the flaw in the BSD tty driver. */ | |
2171 | ||
2172 | static int ttspeeds[] = | |
2173 | { | |
2174 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, | |
2175 | 1800, 2400, 4800, 9600, 19200, 38400 | |
2176 | }; | |
2177 | ||
2178 | static void | |
2179 | draino (fd, ospeed) | |
2180 | int fd, ospeed; | |
2181 | { | |
2182 | register int delay = ttspeeds[ospeed]; | |
2183 | int n; | |
2184 | ||
2185 | if (!delay) | |
2186 | return; | |
2187 | ||
2188 | while ((ioctl (fd, TIOCOUTQ, &n) == 0) && n) | |
2189 | { | |
2190 | if (n > (delay / 100)) | |
2191 | { | |
2192 | struct timeval tv; | |
2193 | ||
2194 | n *= 10; /* 2 bits more for conservativeness. */ | |
2195 | tv.tv_sec = n / delay; | |
2196 | tv.tv_usec = ((n % delay) * 1000000) / delay; | |
2197 | select (fd, (fd_set *)0, (fd_set *)0, (fd_set *)0, &tv); | |
2198 | } | |
2199 | else | |
2200 | break; | |
2201 | } | |
2202 | } | |
2203 | #endif /* NEW_TTY_DRIVER && DRAIN_OUTPUT */ | |
2204 | ||
2205 | /* Return the fd from which we are actually getting input. */ | |
2206 | #define input_tty() (shell_tty != -1) ? shell_tty : fileno (stderr) | |
2207 | ||
2208 | /* Fill the contents of shell_tty_info with the current tty info. */ | |
ccc6cda3 | 2209 | int |
726f6388 JA |
2210 | get_tty_state () |
2211 | { | |
ccc6cda3 | 2212 | int tty; |
726f6388 | 2213 | |
ccc6cda3 | 2214 | tty = input_tty (); |
726f6388 JA |
2215 | if (tty != -1) |
2216 | { | |
2217 | #if defined (NEW_TTY_DRIVER) | |
2218 | ioctl (tty, TIOCGETP, &shell_tty_info); | |
2219 | ioctl (tty, TIOCGETC, &shell_tchars); | |
2220 | ioctl (tty, TIOCGLTC, &shell_ltchars); | |
2221 | #endif /* NEW_TTY_DRIVER */ | |
2222 | ||
2223 | #if defined (TERMIO_TTY_DRIVER) | |
2224 | ioctl (tty, TCGETA, &shell_tty_info); | |
2225 | #endif /* TERMIO_TTY_DRIVER */ | |
2226 | ||
2227 | #if defined (TERMIOS_TTY_DRIVER) | |
2228 | if (tcgetattr (tty, &shell_tty_info) < 0) | |
2229 | { | |
2230 | #if 0 | |
2231 | /* Only print an error message if we're really interactive at | |
2232 | this time. */ | |
2233 | if (interactive) | |
3185942a | 2234 | sys_error ("[%ld: %d (%d)] tcgetattr", (long)getpid (), shell_level, tty); |
726f6388 JA |
2235 | #endif |
2236 | return -1; | |
2237 | } | |
2238 | #endif /* TERMIOS_TTY_DRIVER */ | |
ccc6cda3 | 2239 | if (check_window_size) |
95732b49 | 2240 | get_new_window_size (0, (int *)0, (int *)0); |
726f6388 JA |
2241 | } |
2242 | return 0; | |
2243 | } | |
2244 | ||
2245 | /* Make the current tty use the state in shell_tty_info. */ | |
ccc6cda3 | 2246 | int |
726f6388 JA |
2247 | set_tty_state () |
2248 | { | |
d166f048 | 2249 | int tty; |
726f6388 | 2250 | |
d166f048 | 2251 | tty = input_tty (); |
726f6388 JA |
2252 | if (tty != -1) |
2253 | { | |
2254 | #if defined (NEW_TTY_DRIVER) | |
2255 | # if defined (DRAIN_OUTPUT) | |
2256 | draino (tty, shell_tty_info.sg_ospeed); | |
2257 | # endif /* DRAIN_OUTPUT */ | |
2258 | ioctl (tty, TIOCSETN, &shell_tty_info); | |
2259 | ioctl (tty, TIOCSETC, &shell_tchars); | |
2260 | ioctl (tty, TIOCSLTC, &shell_ltchars); | |
2261 | #endif /* NEW_TTY_DRIVER */ | |
2262 | ||
2263 | #if defined (TERMIO_TTY_DRIVER) | |
2264 | ioctl (tty, TCSETAW, &shell_tty_info); | |
2265 | #endif /* TERMIO_TTY_DRIVER */ | |
2266 | ||
2267 | #if defined (TERMIOS_TTY_DRIVER) | |
2268 | if (tcsetattr (tty, TCSADRAIN, &shell_tty_info) < 0) | |
2269 | { | |
2270 | /* Only print an error message if we're really interactive at | |
2271 | this time. */ | |
2272 | if (interactive) | |
3185942a | 2273 | sys_error ("[%ld: %d (%d)] tcsetattr", (long)getpid (), shell_level, tty); |
726f6388 JA |
2274 | return -1; |
2275 | } | |
2276 | #endif /* TERMIOS_TTY_DRIVER */ | |
2277 | } | |
2278 | return 0; | |
2279 | } | |
2280 | ||
95732b49 | 2281 | /* Given an index into the jobs array JOB, return the PROCESS struct of the last |
726f6388 | 2282 | process in that job's pipeline. This is the one whose exit status |
7117c2d2 | 2283 | counts. Must be called with SIGCHLD blocked or queued. */ |
95732b49 JA |
2284 | static PROCESS * |
2285 | find_last_proc (job, block) | |
726f6388 | 2286 | int job; |
7117c2d2 | 2287 | int block; |
726f6388 JA |
2288 | { |
2289 | register PROCESS *p; | |
7117c2d2 JA |
2290 | sigset_t set, oset; |
2291 | ||
2292 | if (block) | |
2293 | BLOCK_CHILD (set, oset); | |
726f6388 JA |
2294 | |
2295 | p = jobs[job]->pipe; | |
0628567a | 2296 | while (p && p->next != jobs[job]->pipe) |
726f6388 JA |
2297 | p = p->next; |
2298 | ||
7117c2d2 JA |
2299 | if (block) |
2300 | UNBLOCK_CHILD (oset); | |
cce855bc | 2301 | |
95732b49 | 2302 | return (p); |
cce855bc JA |
2303 | } |
2304 | ||
95732b49 JA |
2305 | static pid_t |
2306 | find_last_pid (job, block) | |
2307 | int job; | |
2308 | int block; | |
2309 | { | |
2310 | PROCESS *p; | |
2311 | ||
2312 | p = find_last_proc (job, block); | |
2313 | /* Possible race condition here. */ | |
2314 | return p->pid; | |
2315 | } | |
2316 | ||
726f6388 JA |
2317 | /* Wait for a particular child of the shell to finish executing. |
2318 | This low-level function prints an error message if PID is not | |
7117c2d2 JA |
2319 | a child of this shell. It returns -1 if it fails, or whatever |
2320 | wait_for returns otherwise. If the child is not found in the | |
a0c0a00f CR |
2321 | jobs table, it returns 127. If FLAGS doesn't include 1, we |
2322 | suppress the error message if PID isn't found. */ | |
2323 | ||
726f6388 | 2324 | int |
a0c0a00f | 2325 | wait_for_single_pid (pid, flags) |
726f6388 | 2326 | pid_t pid; |
a0c0a00f | 2327 | int flags; |
726f6388 JA |
2328 | { |
2329 | register PROCESS *child; | |
ccc6cda3 | 2330 | sigset_t set, oset; |
cce855bc | 2331 | int r, job; |
726f6388 | 2332 | |
ccc6cda3 | 2333 | BLOCK_CHILD (set, oset); |
7117c2d2 | 2334 | child = find_pipeline (pid, 0, (int *)NULL); |
ccc6cda3 | 2335 | UNBLOCK_CHILD (oset); |
726f6388 | 2336 | |
95732b49 JA |
2337 | if (child == 0) |
2338 | { | |
2339 | r = bgp_search (pid); | |
2340 | if (r >= 0) | |
2341 | return r; | |
2342 | } | |
2343 | ||
ccc6cda3 | 2344 | if (child == 0) |
726f6388 | 2345 | { |
a0c0a00f CR |
2346 | if (flags & 1) |
2347 | internal_error (_("wait: pid %ld is not a child of this shell"), (long)pid); | |
726f6388 JA |
2348 | return (127); |
2349 | } | |
2350 | ||
cce855bc JA |
2351 | r = wait_for (pid); |
2352 | ||
b72432fd JA |
2353 | /* POSIX.2: if we just waited for a job, we can remove it from the jobs |
2354 | table. */ | |
2355 | BLOCK_CHILD (set, oset); | |
95732b49 | 2356 | job = find_job (pid, 0, NULL); |
b72432fd JA |
2357 | if (job != NO_JOB && jobs[job] && DEADJOB (job)) |
2358 | jobs[job]->flags |= J_NOTIFIED; | |
2359 | UNBLOCK_CHILD (oset); | |
cce855bc | 2360 | |
95732b49 JA |
2361 | /* If running in posix mode, remove the job from the jobs table immediately */ |
2362 | if (posixly_correct) | |
2363 | { | |
2364 | cleanup_dead_jobs (); | |
2365 | bgp_delete (pid); | |
2366 | } | |
2367 | ||
cce855bc | 2368 | return r; |
726f6388 JA |
2369 | } |
2370 | ||
495aee44 | 2371 | /* Wait for all of the background processes started by this shell to finish. */ |
726f6388 JA |
2372 | void |
2373 | wait_for_background_pids () | |
2374 | { | |
7117c2d2 | 2375 | register int i, r, waited_for; |
ccc6cda3 JA |
2376 | sigset_t set, oset; |
2377 | pid_t pid; | |
726f6388 | 2378 | |
bb70624e | 2379 | for (waited_for = 0;;) |
ccc6cda3 | 2380 | { |
726f6388 JA |
2381 | BLOCK_CHILD (set, oset); |
2382 | ||
7117c2d2 | 2383 | /* find first running job; if none running in foreground, break */ |
0628567a | 2384 | /* XXX could use js.j_firstj and js.j_lastj here */ |
95732b49 JA |
2385 | for (i = 0; i < js.j_jobslots; i++) |
2386 | { | |
2387 | #if defined (DEBUG) | |
2388 | if (i < js.j_firstj && jobs[i]) | |
2389 | itrace("wait_for_background_pids: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
0628567a JA |
2390 | if (i > js.j_lastj && jobs[i]) |
2391 | itrace("wait_for_background_pids: job %d non-null after js.j_lastj (%d)", i, js.j_lastj); | |
95732b49 JA |
2392 | #endif |
2393 | if (jobs[i] && RUNNING (i) && IS_FOREGROUND (i) == 0) | |
2394 | break; | |
2395 | } | |
2396 | if (i == js.j_jobslots) | |
726f6388 JA |
2397 | { |
2398 | UNBLOCK_CHILD (oset); | |
2399 | break; | |
2400 | } | |
2401 | ||
7117c2d2 JA |
2402 | /* now wait for the last pid in that job. */ |
2403 | pid = find_last_pid (i, 0); | |
2404 | UNBLOCK_CHILD (oset); | |
2405 | QUIT; | |
2406 | errno = 0; /* XXX */ | |
a0c0a00f | 2407 | r = wait_for_single_pid (pid, 1); |
7117c2d2 JA |
2408 | if (r == -1) |
2409 | { | |
2410 | /* If we're mistaken about job state, compensate. */ | |
2411 | if (errno == ECHILD) | |
2412 | mark_all_jobs_as_dead (); | |
2413 | } | |
2414 | else | |
2415 | waited_for++; | |
726f6388 | 2416 | } |
b72432fd JA |
2417 | |
2418 | /* POSIX.2 says the shell can discard the statuses of all completed jobs if | |
2419 | `wait' is called with no arguments. */ | |
2420 | mark_dead_jobs_as_notified (1); | |
2421 | cleanup_dead_jobs (); | |
95732b49 | 2422 | bgp_clear (); |
726f6388 JA |
2423 | } |
2424 | ||
2425 | /* Make OLD_SIGINT_HANDLER the SIGINT signal handler. */ | |
2426 | #define INVALID_SIGNAL_HANDLER (SigHandler *)wait_for_background_pids | |
2427 | static SigHandler *old_sigint_handler = INVALID_SIGNAL_HANDLER; | |
2428 | ||
ac50fbac CR |
2429 | static int wait_sigint_received; |
2430 | static int child_caught_sigint; | |
2431 | static int waiting_for_child; | |
2432 | ||
a0c0a00f CR |
2433 | /* Clean up state after longjmp to wait_intr_buf */ |
2434 | void | |
2435 | wait_sigint_cleanup () | |
2436 | { | |
2437 | queue_sigchld = 0; | |
2438 | waiting_for_child = 0; | |
2439 | } | |
2440 | ||
726f6388 JA |
2441 | static void |
2442 | restore_sigint_handler () | |
2443 | { | |
2444 | if (old_sigint_handler != INVALID_SIGNAL_HANDLER) | |
2445 | { | |
2446 | set_signal_handler (SIGINT, old_sigint_handler); | |
2447 | old_sigint_handler = INVALID_SIGNAL_HANDLER; | |
ac50fbac | 2448 | waiting_for_child = 0; |
726f6388 JA |
2449 | } |
2450 | } | |
2451 | ||
726f6388 JA |
2452 | /* Handle SIGINT while we are waiting for children in a script to exit. |
2453 | The `wait' builtin should be interruptible, but all others should be | |
2454 | effectively ignored (i.e. not cause the shell to exit). */ | |
2455 | static sighandler | |
2456 | wait_sigint_handler (sig) | |
2457 | int sig; | |
2458 | { | |
bb70624e JA |
2459 | SigHandler *sigint_handler; |
2460 | ||
726f6388 JA |
2461 | if (interrupt_immediately || |
2462 | (this_shell_builtin && this_shell_builtin == wait_builtin)) | |
2463 | { | |
ac50fbac | 2464 | last_command_exit_value = 128+SIGINT; |
726f6388 | 2465 | restore_sigint_handler (); |
bb70624e | 2466 | /* If we got a SIGINT while in `wait', and SIGINT is trapped, do |
28ef6c31 | 2467 | what POSIX.2 says (see builtins/wait.def for more info). */ |
bb70624e JA |
2468 | if (this_shell_builtin && this_shell_builtin == wait_builtin && |
2469 | signal_is_trapped (SIGINT) && | |
2470 | ((sigint_handler = trap_to_sighandler (SIGINT)) == trap_handler)) | |
2471 | { | |
bb70624e | 2472 | trap_handler (SIGINT); /* set pending_traps[SIGINT] */ |
7117c2d2 | 2473 | wait_signal_received = SIGINT; |
a0c0a00f | 2474 | if (interrupt_immediately && wait_intr_flag) |
ac50fbac CR |
2475 | { |
2476 | interrupt_immediately = 0; | |
a0c0a00f | 2477 | sh_longjmp (wait_intr_buf, 1); |
ac50fbac CR |
2478 | } |
2479 | else | |
2480 | /* Let CHECK_WAIT_INTR handle it in wait_for/waitchld */ | |
2481 | SIGRETURN (0); | |
bb70624e | 2482 | } |
ac50fbac CR |
2483 | else if (interrupt_immediately) |
2484 | { | |
2485 | ADDINTERRUPT; | |
2486 | QUIT; | |
2487 | } | |
2488 | else /* wait_builtin but signal not trapped, treat as interrupt */ | |
2489 | kill (getpid (), SIGINT); | |
726f6388 JA |
2490 | } |
2491 | ||
ccc6cda3 JA |
2492 | /* XXX - should this be interrupt_state? If it is, the shell will act |
2493 | as if it got the SIGINT interrupt. */ | |
ac50fbac CR |
2494 | if (waiting_for_child) |
2495 | wait_sigint_received = 1; | |
2496 | else | |
2497 | { | |
2498 | last_command_exit_value = 128+SIGINT; | |
2499 | restore_sigint_handler (); | |
2500 | kill (getpid (), SIGINT); | |
2501 | } | |
ccc6cda3 | 2502 | |
726f6388 JA |
2503 | /* Otherwise effectively ignore the SIGINT and allow the running job to |
2504 | be killed. */ | |
ccc6cda3 | 2505 | SIGRETURN (0); |
726f6388 JA |
2506 | } |
2507 | ||
b80f6443 JA |
2508 | static int |
2509 | process_exit_signal (status) | |
2510 | WAIT status; | |
2511 | { | |
2512 | return (WIFSIGNALED (status) ? WTERMSIG (status) : 0); | |
2513 | } | |
2514 | ||
726f6388 JA |
2515 | static int |
2516 | process_exit_status (status) | |
2517 | WAIT status; | |
2518 | { | |
2519 | if (WIFSIGNALED (status)) | |
2520 | return (128 + WTERMSIG (status)); | |
ccc6cda3 | 2521 | else if (WIFSTOPPED (status) == 0) |
726f6388 JA |
2522 | return (WEXITSTATUS (status)); |
2523 | else | |
2524 | return (EXECUTION_SUCCESS); | |
2525 | } | |
2526 | ||
f1be666c JA |
2527 | static WAIT |
2528 | job_signal_status (job) | |
2529 | int job; | |
2530 | { | |
2531 | register PROCESS *p; | |
2532 | WAIT s; | |
2533 | ||
2534 | p = jobs[job]->pipe; | |
2535 | do | |
2536 | { | |
2537 | s = p->status; | |
2538 | if (WIFSIGNALED(s) || WIFSTOPPED(s)) | |
2539 | break; | |
2540 | p = p->next; | |
2541 | } | |
2542 | while (p != jobs[job]->pipe); | |
2543 | ||
2544 | return s; | |
2545 | } | |
2546 | ||
28ef6c31 JA |
2547 | /* Return the exit status of the last process in the pipeline for job JOB. |
2548 | This is the exit status of the entire job. */ | |
2549 | static WAIT | |
bb70624e | 2550 | raw_job_exit_status (job) |
f73dda09 | 2551 | int job; |
ccc6cda3 JA |
2552 | { |
2553 | register PROCESS *p; | |
b80f6443 | 2554 | int fail; |
3185942a | 2555 | WAIT ret; |
b80f6443 JA |
2556 | |
2557 | if (pipefail_opt) | |
2558 | { | |
2559 | fail = 0; | |
eb873671 JA |
2560 | p = jobs[job]->pipe; |
2561 | do | |
2562 | { | |
3185942a JA |
2563 | if (WSTATUS (p->status) != EXECUTION_SUCCESS) |
2564 | fail = WSTATUS(p->status); | |
eb873671 JA |
2565 | p = p->next; |
2566 | } | |
2567 | while (p != jobs[job]->pipe); | |
3185942a JA |
2568 | WSTATUS (ret) = fail; |
2569 | return ret; | |
b80f6443 JA |
2570 | } |
2571 | ||
ccc6cda3 JA |
2572 | for (p = jobs[job]->pipe; p->next != jobs[job]->pipe; p = p->next) |
2573 | ; | |
bb70624e JA |
2574 | return (p->status); |
2575 | } | |
2576 | ||
28ef6c31 JA |
2577 | /* Return the exit status of job JOB. This is the exit status of the last |
2578 | (rightmost) process in the job's pipeline, modified if the job was killed | |
2579 | by a signal or stopped. */ | |
495aee44 | 2580 | int |
bb70624e JA |
2581 | job_exit_status (job) |
2582 | int job; | |
2583 | { | |
2584 | return (process_exit_status (raw_job_exit_status (job))); | |
ccc6cda3 JA |
2585 | } |
2586 | ||
495aee44 | 2587 | int |
b80f6443 JA |
2588 | job_exit_signal (job) |
2589 | int job; | |
2590 | { | |
2591 | return (process_exit_signal (raw_job_exit_status (job))); | |
2592 | } | |
2593 | ||
ccc6cda3 JA |
2594 | #define FIND_CHILD(pid, child) \ |
2595 | do \ | |
2596 | { \ | |
7117c2d2 | 2597 | child = find_pipeline (pid, 0, (int *)NULL); \ |
ccc6cda3 JA |
2598 | if (child == 0) \ |
2599 | { \ | |
28ef6c31 | 2600 | give_terminal_to (shell_pgrp, 0); \ |
ccc6cda3 | 2601 | UNBLOCK_CHILD (oset); \ |
b80f6443 | 2602 | internal_error (_("wait_for: No record of process %ld"), (long)pid); \ |
ccc6cda3 JA |
2603 | restore_sigint_handler (); \ |
2604 | return (termination_state = 127); \ | |
2605 | } \ | |
2606 | } \ | |
2607 | while (0) | |
2608 | ||
bb70624e JA |
2609 | /* Wait for pid (one of our children) to terminate, then |
2610 | return the termination state. Returns 127 if PID is not found in | |
2611 | the jobs table. Returns -1 if waitchld() returns -1, indicating | |
2612 | that there are no unwaited-for child processes. */ | |
726f6388 JA |
2613 | int |
2614 | wait_for (pid) | |
2615 | pid_t pid; | |
2616 | { | |
28ef6c31 JA |
2617 | int job, termination_state, r; |
2618 | WAIT s; | |
726f6388 JA |
2619 | register PROCESS *child; |
2620 | sigset_t set, oset; | |
2621 | ||
2622 | /* In the case that this code is interrupted, and we longjmp () out of it, | |
2623 | we are relying on the code in throw_to_top_level () to restore the | |
2624 | top-level signal mask. */ | |
ac50fbac | 2625 | child = 0; |
726f6388 JA |
2626 | BLOCK_CHILD (set, oset); |
2627 | ||
2628 | /* Ignore interrupts while waiting for a job run without job control | |
2629 | to finish. We don't want the shell to exit if an interrupt is | |
2630 | received, only if one of the jobs run is killed via SIGINT. If | |
ccc6cda3 | 2631 | job control is not set, the job will be run in the same pgrp as |
f1be666c JA |
2632 | the shell, and the shell will see any signals the job gets. In |
2633 | fact, we want this set every time the waiting shell and the waited- | |
2634 | for process are in the same process group, including command | |
2635 | substitution. */ | |
726f6388 JA |
2636 | |
2637 | /* This is possibly a race condition -- should it go in stop_pipeline? */ | |
ac50fbac | 2638 | wait_sigint_received = child_caught_sigint = 0; |
f1be666c | 2639 | if (job_control == 0 || (subshell_environment&SUBSHELL_COMSUB)) |
0628567a JA |
2640 | { |
2641 | old_sigint_handler = set_signal_handler (SIGINT, wait_sigint_handler); | |
ac50fbac | 2642 | waiting_for_child = 0; |
0628567a JA |
2643 | if (old_sigint_handler == SIG_IGN) |
2644 | set_signal_handler (SIGINT, old_sigint_handler); | |
2645 | } | |
726f6388 JA |
2646 | |
2647 | termination_state = last_command_exit_value; | |
2648 | ||
ccc6cda3 | 2649 | if (interactive && job_control == 0) |
726f6388 | 2650 | QUIT; |
0001803f CR |
2651 | /* Check for terminating signals and exit the shell if we receive one */ |
2652 | CHECK_TERMSIG; | |
726f6388 | 2653 | |
ac50fbac CR |
2654 | /* Check for a trapped signal interrupting the wait builtin and jump out */ |
2655 | CHECK_WAIT_INTR; | |
2656 | ||
ccc6cda3 JA |
2657 | /* If we say wait_for (), then we have a record of this child somewhere. |
2658 | If it and none of its peers are running, don't call waitchld(). */ | |
726f6388 | 2659 | |
ccc6cda3 JA |
2660 | job = NO_JOB; |
2661 | do | |
726f6388 | 2662 | { |
ac50fbac CR |
2663 | if (pid != ANY_PID) |
2664 | FIND_CHILD (pid, child); | |
726f6388 | 2665 | |
ccc6cda3 | 2666 | /* If this child is part of a job, then we are really waiting for the |
28ef6c31 JA |
2667 | job to finish. Otherwise, we are waiting for the child to finish. |
2668 | We check for JDEAD in case the job state has been set by waitchld | |
2669 | after receipt of a SIGCHLD. */ | |
a0c0a00f | 2670 | if (job == NO_JOB) /* XXX -- && pid != ANY_PID ? */ |
95732b49 | 2671 | job = find_job (pid, 0, NULL); |
726f6388 | 2672 | |
28ef6c31 JA |
2673 | /* waitchld() takes care of setting the state of the job. If the job |
2674 | has already exited before this is called, sigchld_handler will have | |
2675 | called waitchld and the state will be set to JDEAD. */ | |
726f6388 | 2676 | |
ac50fbac | 2677 | if (pid == ANY_PID || PRUNNING(child) || (job != NO_JOB && RUNNING (job))) |
ccc6cda3 JA |
2678 | { |
2679 | #if defined (WAITPID_BROKEN) /* SCOv4 */ | |
2680 | sigset_t suspend_set; | |
2681 | sigemptyset (&suspend_set); | |
2682 | sigsuspend (&suspend_set); | |
726f6388 | 2683 | #else /* !WAITPID_BROKEN */ |
ccc6cda3 JA |
2684 | # if defined (MUST_UNBLOCK_CHLD) |
2685 | struct sigaction act, oact; | |
2686 | sigset_t nullset, chldset; | |
2687 | ||
a0c0a00f | 2688 | queue_sigchld = 1; |
ccc6cda3 JA |
2689 | sigemptyset (&nullset); |
2690 | sigemptyset (&chldset); | |
2691 | sigprocmask (SIG_SETMASK, &nullset, &chldset); | |
2692 | act.sa_handler = SIG_DFL; | |
2693 | sigemptyset (&act.sa_mask); | |
2694 | sigemptyset (&oact.sa_mask); | |
2695 | act.sa_flags = 0; | |
ac50fbac CR |
2696 | # if defined (SA_RESTART) |
2697 | act.sa_flags |= SA_RESTART; | |
726f6388 | 2698 | # endif |
ac50fbac CR |
2699 | sigaction (SIGCHLD, &act, &oact); |
2700 | # endif /* MUST_UNBLOCK_CHLD */ | |
7117c2d2 | 2701 | queue_sigchld = 1; |
ac50fbac CR |
2702 | waiting_for_child++; |
2703 | r = waitchld (pid, 1); /* XXX */ | |
2704 | waiting_for_child--; | |
2705 | #if 0 | |
2706 | itrace("wait_for: blocking wait for %d returns %d child = %p", (int)pid, r, child); | |
2707 | #endif | |
ccc6cda3 JA |
2708 | # if defined (MUST_UNBLOCK_CHLD) |
2709 | sigaction (SIGCHLD, &oact, (struct sigaction *)NULL); | |
2710 | sigprocmask (SIG_SETMASK, &chldset, (sigset_t *)NULL); | |
726f6388 | 2711 | # endif |
7117c2d2 | 2712 | queue_sigchld = 0; |
bb70624e JA |
2713 | if (r == -1 && errno == ECHILD && this_shell_builtin == wait_builtin) |
2714 | { | |
2715 | termination_state = -1; | |
ac50fbac | 2716 | /* XXX - restore sigint handler here? */ |
bb70624e JA |
2717 | goto wait_for_return; |
2718 | } | |
28ef6c31 JA |
2719 | |
2720 | /* If child is marked as running, but waitpid() returns -1/ECHILD, | |
2721 | there is something wrong. Somewhere, wait should have returned | |
2722 | that child's pid. Mark the child as not running and the job, | |
2723 | if it exists, as JDEAD. */ | |
2724 | if (r == -1 && errno == ECHILD) | |
2725 | { | |
ac50fbac CR |
2726 | if (child) |
2727 | { | |
2728 | child->running = PS_DONE; | |
2729 | WSTATUS (child->status) = 0; /* XXX -- can't find true status */ | |
2730 | } | |
0628567a | 2731 | js.c_living = 0; /* no living child processes */ |
28ef6c31 | 2732 | if (job != NO_JOB) |
95732b49 JA |
2733 | { |
2734 | jobs[job]->state = JDEAD; | |
2735 | js.c_reaped++; | |
2736 | js.j_ndead++; | |
2737 | } | |
ac50fbac CR |
2738 | if (pid == ANY_PID) |
2739 | { | |
2740 | termination_state = -1; | |
2741 | break; | |
2742 | } | |
28ef6c31 | 2743 | } |
ccc6cda3 JA |
2744 | #endif /* WAITPID_BROKEN */ |
2745 | } | |
2746 | ||
2747 | /* If the shell is interactive, and job control is disabled, see | |
2748 | if the foreground process has died due to SIGINT and jump out | |
2749 | of the wait loop if it has. waitchld has already restored the | |
2750 | old SIGINT signal handler. */ | |
2751 | if (interactive && job_control == 0) | |
2752 | QUIT; | |
0001803f CR |
2753 | /* Check for terminating signals and exit the shell if we receive one */ |
2754 | CHECK_TERMSIG; | |
ac50fbac CR |
2755 | |
2756 | /* Check for a trapped signal interrupting the wait builtin and jump out */ | |
2757 | CHECK_WAIT_INTR; | |
2758 | ||
2759 | if (pid == ANY_PID) | |
2760 | /* XXX - could set child but we don't have a handle on what waitchld | |
2761 | reaps. Leave termination_state alone. */ | |
2762 | goto wait_for_return; | |
726f6388 | 2763 | } |
95732b49 | 2764 | while (PRUNNING (child) || (job != NO_JOB && RUNNING (job))); |
726f6388 | 2765 | |
ac50fbac CR |
2766 | /* Restore the original SIGINT signal handler before we return. */ |
2767 | restore_sigint_handler (); | |
2768 | ||
726f6388 JA |
2769 | /* The exit state of the command is either the termination state of the |
2770 | child, or the termination state of the job. If a job, the status | |
b80f6443 JA |
2771 | of the last child in the pipeline is the significant one. If the command |
2772 | or job was terminated by a signal, note that value also. */ | |
2773 | termination_state = (job != NO_JOB) ? job_exit_status (job) | |
a0c0a00f | 2774 | : (child ? process_exit_status (child->status) : EXECUTION_SUCCESS); |
b80f6443 | 2775 | last_command_exit_signal = (job != NO_JOB) ? job_exit_signal (job) |
a0c0a00f | 2776 | : (child ? process_exit_signal (child->status) : 0); |
726f6388 | 2777 | |
95732b49 | 2778 | /* XXX */ |
a0c0a00f | 2779 | if ((job != NO_JOB && JOBSTATE (job) == JSTOPPED) || (child && WIFSTOPPED (child->status))) |
95732b49 JA |
2780 | termination_state = 128 + WSTOPSIG (child->status); |
2781 | ||
ccc6cda3 | 2782 | if (job == NO_JOB || IS_JOBCONTROL (job)) |
b72432fd JA |
2783 | { |
2784 | /* XXX - under what circumstances is a job not present in the jobs | |
2785 | table (job == NO_JOB)? | |
2786 | 1. command substitution | |
2787 | ||
2788 | In the case of command substitution, at least, it's probably not | |
2789 | the right thing to give the terminal to the shell's process group, | |
2790 | even though there is code in subst.c:command_substitute to work | |
2791 | around it. | |
2792 | ||
2793 | Things that don't: | |
2794 | $PROMPT_COMMAND execution | |
2795 | process substitution | |
2796 | */ | |
2797 | #if 0 | |
2798 | if (job == NO_JOB) | |
f73dda09 | 2799 | itrace("wait_for: job == NO_JOB, giving the terminal to shell_pgrp (%ld)", (long)shell_pgrp); |
b72432fd | 2800 | #endif |
a0c0a00f CR |
2801 | /* Don't modify terminal pgrp if we are running in background or a |
2802 | subshell. Make sure subst.c:command_substitute uses the same | |
2803 | conditions to determine whether or not it should undo this and | |
2804 | give the terminal to pipeline_pgrp. */ | |
2805 | ||
2806 | if (running_in_background == 0 && (subshell_environment&(SUBSHELL_ASYNC|SUBSHELL_PIPE)) == 0) | |
2807 | give_terminal_to (shell_pgrp, 0); | |
b72432fd | 2808 | } |
726f6388 JA |
2809 | |
2810 | /* If the command did not exit cleanly, or the job is just | |
2811 | being stopped, then reset the tty state back to what it | |
2812 | was before this command. Reset the tty state and notify | |
2813 | the user of the job termination only if the shell is | |
2814 | interactive. Clean up any dead jobs in either case. */ | |
2815 | if (job != NO_JOB) | |
2816 | { | |
ccc6cda3 | 2817 | if (interactive_shell && subshell_environment == 0) |
726f6388 | 2818 | { |
bb70624e JA |
2819 | /* This used to use `child->status'. That's wrong, however, for |
2820 | pipelines. `child' is the first process in the pipeline. It's | |
2821 | likely that the process we want to check for abnormal termination | |
2822 | or stopping is the last process in the pipeline, especially if | |
2823 | it's long-lived and the first process is short-lived. Since we | |
2824 | know we have a job here, we can check all the processes in this | |
2825 | job's pipeline and see if one of them stopped or terminated due | |
2826 | to a signal. We might want to change this later to just check | |
2827 | the last process in the pipeline. If no process exits due to a | |
2828 | signal, S is left as the status of the last job in the pipeline. */ | |
f1be666c | 2829 | s = job_signal_status (job); |
bb70624e JA |
2830 | |
2831 | if (WIFSIGNALED (s) || WIFSTOPPED (s)) | |
e8ce775d JA |
2832 | { |
2833 | set_tty_state (); | |
28ef6c31 | 2834 | |
bb70624e JA |
2835 | /* If the current job was stopped or killed by a signal, and |
2836 | the user has requested it, get a possibly new window size */ | |
95732b49 JA |
2837 | if (check_window_size && (job == js.j_current || IS_FOREGROUND (job))) |
2838 | get_new_window_size (0, (int *)0, (int *)0); | |
e8ce775d | 2839 | } |
726f6388 | 2840 | else |
a0c0a00f CR |
2841 | #if defined (READLINE) |
2842 | /* We don't want to do this if we are running a process during | |
2843 | programmable completion. */ | |
2844 | if (RL_ISSTATE (RL_STATE_COMPLETING) == 0) | |
2845 | #endif | |
726f6388 JA |
2846 | get_tty_state (); |
2847 | ||
2848 | /* If job control is enabled, the job was started with job | |
2849 | control, the job was the foreground job, and it was killed | |
2850 | by SIGINT, then print a newline to compensate for the kernel | |
2851 | printing the ^C without a trailing newline. */ | |
ccc6cda3 | 2852 | if (job_control && IS_JOBCONTROL (job) && IS_FOREGROUND (job) && |
bb70624e | 2853 | WIFSIGNALED (s) && WTERMSIG (s) == SIGINT) |
726f6388 | 2854 | { |
ccc6cda3 JA |
2855 | /* If SIGINT is not trapped and the shell is in a for, while, |
2856 | or until loop, act as if the shell received SIGINT as | |
2857 | well, so the loop can be broken. This doesn't call the | |
2858 | SIGINT signal handler; maybe it should. */ | |
3185942a | 2859 | if (signal_is_trapped (SIGINT) == 0 && (loop_level || (shell_compatibility_level > 32 && executing_list))) |
ccc6cda3 | 2860 | ADDINTERRUPT; |
a0c0a00f CR |
2861 | /* Call any SIGINT trap handler if the shell is running a loop, so |
2862 | the loop can be broken. This seems more useful and matches the | |
2863 | behavior when the shell is running a builtin command in a loop | |
2864 | when it is interrupted. Change ADDINTERRUPT to | |
2865 | trap_handler (SIGINT) to run the trap without interrupting the | |
2866 | loop. */ | |
2867 | else if (signal_is_trapped (SIGINT) && loop_level) | |
2868 | ADDINTERRUPT; | |
ccc6cda3 | 2869 | else |
726f6388 | 2870 | { |
ccc6cda3 JA |
2871 | putchar ('\n'); |
2872 | fflush (stdout); | |
726f6388 JA |
2873 | } |
2874 | } | |
726f6388 | 2875 | } |
495aee44 | 2876 | else if ((subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PIPE)) && wait_sigint_received) |
f1be666c JA |
2877 | { |
2878 | /* If waiting for a job in a subshell started to do command | |
495aee44 CR |
2879 | substitution or to run a pipeline element that consists of |
2880 | something like a while loop or a for loop, simulate getting | |
2881 | and being killed by the SIGINT to pass the status back to our | |
2882 | parent. */ | |
ac50fbac | 2883 | if (child_caught_sigint == 0 && signal_is_trapped (SIGINT) == 0) |
f1be666c JA |
2884 | { |
2885 | UNBLOCK_CHILD (oset); | |
f1be666c JA |
2886 | old_sigint_handler = set_signal_handler (SIGINT, SIG_DFL); |
2887 | if (old_sigint_handler == SIG_IGN) | |
2888 | restore_sigint_handler (); | |
2889 | else | |
2890 | kill (getpid (), SIGINT); | |
2891 | } | |
2892 | } | |
ac50fbac CR |
2893 | else if (interactive_shell == 0 && IS_FOREGROUND (job) && check_window_size) |
2894 | get_new_window_size (0, (int *)0, (int *)0); | |
28ef6c31 | 2895 | |
7117c2d2 JA |
2896 | /* Moved here from set_job_status_and_cleanup, which is in the SIGCHLD |
2897 | signal handler path */ | |
2898 | if (DEADJOB (job) && IS_FOREGROUND (job) /*&& subshell_environment == 0*/) | |
2899 | setjstatus (job); | |
2900 | ||
28ef6c31 JA |
2901 | /* If this job is dead, notify the user of the status. If the shell |
2902 | is interactive, this will display a message on the terminal. If | |
2903 | the shell is not interactive, make sure we turn on the notify bit | |
2904 | so we don't get an unwanted message about the job's termination, | |
2905 | and so delete_job really clears the slot in the jobs table. */ | |
2906 | notify_and_cleanup (); | |
726f6388 | 2907 | } |
ccc6cda3 | 2908 | |
bb70624e JA |
2909 | wait_for_return: |
2910 | ||
726f6388 JA |
2911 | UNBLOCK_CHILD (oset); |
2912 | ||
726f6388 JA |
2913 | return (termination_state); |
2914 | } | |
2915 | ||
bb70624e JA |
2916 | /* Wait for the last process in the pipeline for JOB. Returns whatever |
2917 | wait_for returns: the last process's termination state or -1 if there | |
2918 | are no unwaited-for child processes or an error occurs. */ | |
726f6388 JA |
2919 | int |
2920 | wait_for_job (job) | |
2921 | int job; | |
2922 | { | |
ccc6cda3 | 2923 | pid_t pid; |
cce855bc JA |
2924 | int r; |
2925 | sigset_t set, oset; | |
2926 | ||
2927 | BLOCK_CHILD(set, oset); | |
2928 | if (JOBSTATE (job) == JSTOPPED) | |
b80f6443 | 2929 | internal_warning (_("wait_for_job: job %d is stopped"), job+1); |
ccc6cda3 | 2930 | |
7117c2d2 JA |
2931 | pid = find_last_pid (job, 0); |
2932 | UNBLOCK_CHILD(oset); | |
cce855bc JA |
2933 | r = wait_for (pid); |
2934 | ||
b72432fd JA |
2935 | /* POSIX.2: we can remove the job from the jobs table if we just waited |
2936 | for it. */ | |
2937 | BLOCK_CHILD (set, oset); | |
2938 | if (job != NO_JOB && jobs[job] && DEADJOB (job)) | |
2939 | jobs[job]->flags |= J_NOTIFIED; | |
2940 | UNBLOCK_CHILD (oset); | |
cce855bc JA |
2941 | |
2942 | return r; | |
726f6388 JA |
2943 | } |
2944 | ||
ac50fbac CR |
2945 | /* Wait for any background job started by this shell to finish. Very |
2946 | similar to wait_for_background_pids(). Returns the exit status of | |
2947 | the next exiting job, -1 if there are no background jobs. The caller | |
2948 | is responsible for translating -1 into the right return value. */ | |
2949 | int | |
2950 | wait_for_any_job () | |
2951 | { | |
2952 | pid_t pid; | |
2953 | int i, r, waited_for; | |
2954 | sigset_t set, oset; | |
2955 | ||
2956 | if (jobs_list_frozen) | |
2957 | return -1; | |
2958 | ||
2959 | /* First see if there are any unnotified dead jobs that we can report on */ | |
2960 | BLOCK_CHILD (set, oset); | |
2961 | for (i = 0; i < js.j_jobslots; i++) | |
2962 | { | |
2963 | if (jobs[i] && DEADJOB (i) && IS_NOTIFIED (i) == 0) | |
2964 | { | |
2965 | return_job: | |
2966 | r = job_exit_status (i); | |
2967 | notify_of_job_status (); /* XXX */ | |
2968 | delete_job (i, 0); | |
2969 | #if defined (COPROCESS_SUPPORT) | |
2970 | coproc_reap (); | |
2971 | #endif | |
2972 | UNBLOCK_CHILD (oset); | |
2973 | return r; | |
2974 | } | |
2975 | } | |
2976 | UNBLOCK_CHILD (oset); | |
2977 | ||
2978 | /* At this point, we have no dead jobs in the jobs table. Wait until we | |
2979 | get one, even if it takes multiple pids exiting. */ | |
2980 | for (waited_for = 0;;) | |
2981 | { | |
2982 | /* Make sure there is a background job to wait for */ | |
2983 | BLOCK_CHILD (set, oset); | |
2984 | for (i = 0; i < js.j_jobslots; i++) | |
2985 | if (jobs[i] && RUNNING (i) && IS_FOREGROUND (i) == 0) | |
2986 | break; | |
2987 | if (i == js.j_jobslots) | |
2988 | { | |
2989 | UNBLOCK_CHILD (oset); | |
2990 | return -1; | |
2991 | } | |
2992 | ||
2993 | UNBLOCK_CHILD (oset); | |
2994 | ||
2995 | QUIT; | |
2996 | CHECK_TERMSIG; | |
2997 | CHECK_WAIT_INTR; | |
2998 | ||
2999 | errno = 0; | |
3000 | r = wait_for (ANY_PID); /* special sentinel value for wait_for */ | |
3001 | if (r == -1 && errno == ECHILD) | |
3002 | mark_all_jobs_as_dead (); | |
3003 | ||
3004 | /* Now we see if we have any dead jobs and return the first one */ | |
3005 | BLOCK_CHILD (set, oset); | |
3006 | for (i = 0; i < js.j_jobslots; i++) | |
3007 | if (jobs[i] && DEADJOB (i)) | |
3008 | goto return_job; | |
3009 | UNBLOCK_CHILD (oset); | |
3010 | } | |
3011 | ||
3012 | return -1; | |
3013 | } | |
3014 | ||
726f6388 JA |
3015 | /* Print info about dead jobs, and then delete them from the list |
3016 | of known jobs. This does not actually delete jobs when the | |
3017 | shell is not interactive, because the dead jobs are not marked | |
3018 | as notified. */ | |
3019 | void | |
3020 | notify_and_cleanup () | |
3021 | { | |
ccc6cda3 | 3022 | if (jobs_list_frozen) |
726f6388 JA |
3023 | return; |
3024 | ||
28ef6c31 | 3025 | if (interactive || interactive_shell == 0 || sourcelevel) |
726f6388 JA |
3026 | notify_of_job_status (); |
3027 | ||
3028 | cleanup_dead_jobs (); | |
3029 | } | |
3030 | ||
3031 | /* Make dead jobs disappear from the jobs array without notification. | |
3032 | This is used when the shell is not interactive. */ | |
3033 | void | |
3034 | reap_dead_jobs () | |
3035 | { | |
b72432fd | 3036 | mark_dead_jobs_as_notified (0); |
726f6388 JA |
3037 | cleanup_dead_jobs (); |
3038 | } | |
3039 | ||
3040 | /* Return the next closest (chronologically) job to JOB which is in | |
3041 | STATE. STATE can be JSTOPPED, JRUNNING. NO_JOB is returned if | |
3042 | there is no next recent job. */ | |
3043 | static int | |
3044 | most_recent_job_in_state (job, state) | |
3045 | int job; | |
3046 | JOB_STATE state; | |
3047 | { | |
3048 | register int i, result; | |
3049 | sigset_t set, oset; | |
3050 | ||
3051 | BLOCK_CHILD (set, oset); | |
7117c2d2 | 3052 | |
ccc6cda3 | 3053 | for (result = NO_JOB, i = job - 1; i >= 0; i--) |
726f6388 | 3054 | { |
ccc6cda3 | 3055 | if (jobs[i] && (JOBSTATE (i) == state)) |
726f6388 | 3056 | { |
ccc6cda3 JA |
3057 | result = i; |
3058 | break; | |
726f6388 JA |
3059 | } |
3060 | } | |
7117c2d2 | 3061 | |
726f6388 | 3062 | UNBLOCK_CHILD (oset); |
ccc6cda3 | 3063 | |
726f6388 JA |
3064 | return (result); |
3065 | } | |
3066 | ||
3067 | /* Return the newest *stopped* job older than JOB, or NO_JOB if not | |
3068 | found. */ | |
3069 | static int | |
28ef6c31 | 3070 | job_last_stopped (job) |
726f6388 JA |
3071 | int job; |
3072 | { | |
3073 | return (most_recent_job_in_state (job, JSTOPPED)); | |
3074 | } | |
3075 | ||
3076 | /* Return the newest *running* job older than JOB, or NO_JOB if not | |
3077 | found. */ | |
3078 | static int | |
28ef6c31 | 3079 | job_last_running (job) |
726f6388 JA |
3080 | int job; |
3081 | { | |
3082 | return (most_recent_job_in_state (job, JRUNNING)); | |
3083 | } | |
3084 | ||
3085 | /* Make JOB be the current job, and make previous be useful. Must be | |
3086 | called with SIGCHLD blocked. */ | |
3087 | static void | |
3088 | set_current_job (job) | |
3089 | int job; | |
3090 | { | |
ccc6cda3 | 3091 | int candidate; |
726f6388 | 3092 | |
95732b49 | 3093 | if (js.j_current != job) |
726f6388 | 3094 | { |
95732b49 JA |
3095 | js.j_previous = js.j_current; |
3096 | js.j_current = job; | |
726f6388 JA |
3097 | } |
3098 | ||
95732b49 JA |
3099 | /* First choice for previous job is the old current job. */ |
3100 | if (js.j_previous != js.j_current && | |
3101 | js.j_previous != NO_JOB && | |
3102 | jobs[js.j_previous] && | |
3103 | STOPPED (js.j_previous)) | |
726f6388 JA |
3104 | return; |
3105 | ||
3106 | /* Second choice: Newest stopped job that is older than | |
3107 | the current job. */ | |
ccc6cda3 | 3108 | candidate = NO_JOB; |
95732b49 | 3109 | if (STOPPED (js.j_current)) |
726f6388 | 3110 | { |
95732b49 | 3111 | candidate = job_last_stopped (js.j_current); |
726f6388 JA |
3112 | |
3113 | if (candidate != NO_JOB) | |
3114 | { | |
95732b49 | 3115 | js.j_previous = candidate; |
726f6388 JA |
3116 | return; |
3117 | } | |
3118 | } | |
3119 | ||
3120 | /* If we get here, there is either only one stopped job, in which case it is | |
3121 | the current job and the previous job should be set to the newest running | |
3122 | job, or there are only running jobs and the previous job should be set to | |
3123 | the newest running job older than the current job. We decide on which | |
95732b49 | 3124 | alternative to use based on whether or not JOBSTATE(js.j_current) is |
726f6388 JA |
3125 | JSTOPPED. */ |
3126 | ||
95732b49 JA |
3127 | candidate = RUNNING (js.j_current) ? job_last_running (js.j_current) |
3128 | : job_last_running (js.j_jobslots); | |
726f6388 JA |
3129 | |
3130 | if (candidate != NO_JOB) | |
3131 | { | |
95732b49 | 3132 | js.j_previous = candidate; |
726f6388 JA |
3133 | return; |
3134 | } | |
3135 | ||
3136 | /* There is only a single job, and it is both `+' and `-'. */ | |
95732b49 | 3137 | js.j_previous = js.j_current; |
726f6388 JA |
3138 | } |
3139 | ||
3140 | /* Make current_job be something useful, if it isn't already. */ | |
3141 | ||
3142 | /* Here's the deal: The newest non-running job should be `+', and the | |
3143 | next-newest non-running job should be `-'. If there is only a single | |
95732b49 | 3144 | stopped job, the js.j_previous is the newest non-running job. If there |
726f6388 JA |
3145 | are only running jobs, the newest running job is `+' and the |
3146 | next-newest running job is `-'. Must be called with SIGCHLD blocked. */ | |
ccc6cda3 | 3147 | |
726f6388 JA |
3148 | static void |
3149 | reset_current () | |
3150 | { | |
ccc6cda3 | 3151 | int candidate; |
726f6388 | 3152 | |
95732b49 JA |
3153 | if (js.j_jobslots && js.j_current != NO_JOB && jobs[js.j_current] && STOPPED (js.j_current)) |
3154 | candidate = js.j_current; | |
726f6388 JA |
3155 | else |
3156 | { | |
ccc6cda3 JA |
3157 | candidate = NO_JOB; |
3158 | ||
3159 | /* First choice: the previous job. */ | |
95732b49 JA |
3160 | if (js.j_previous != NO_JOB && jobs[js.j_previous] && STOPPED (js.j_previous)) |
3161 | candidate = js.j_previous; | |
726f6388 JA |
3162 | |
3163 | /* Second choice: the most recently stopped job. */ | |
3164 | if (candidate == NO_JOB) | |
95732b49 | 3165 | candidate = job_last_stopped (js.j_jobslots); |
726f6388 | 3166 | |
ccc6cda3 | 3167 | /* Third choice: the newest running job. */ |
726f6388 | 3168 | if (candidate == NO_JOB) |
95732b49 | 3169 | candidate = job_last_running (js.j_jobslots); |
726f6388 JA |
3170 | } |
3171 | ||
3172 | /* If we found a job to use, then use it. Otherwise, there | |
3173 | are no jobs period. */ | |
3174 | if (candidate != NO_JOB) | |
3175 | set_current_job (candidate); | |
3176 | else | |
95732b49 | 3177 | js.j_current = js.j_previous = NO_JOB; |
726f6388 JA |
3178 | } |
3179 | ||
d166f048 JA |
3180 | /* Set up the job structures so we know the job and its processes are |
3181 | all running. */ | |
3182 | static void | |
3183 | set_job_running (job) | |
3184 | int job; | |
3185 | { | |
3186 | register PROCESS *p; | |
3187 | ||
3188 | /* Each member of the pipeline is now running. */ | |
3189 | p = jobs[job]->pipe; | |
3190 | ||
3191 | do | |
3192 | { | |
3193 | if (WIFSTOPPED (p->status)) | |
7117c2d2 | 3194 | p->running = PS_RUNNING; /* XXX - could be PS_STOPPED */ |
d166f048 JA |
3195 | p = p->next; |
3196 | } | |
3197 | while (p != jobs[job]->pipe); | |
3198 | ||
3199 | /* This means that the job is running. */ | |
3200 | JOBSTATE (job) = JRUNNING; | |
3201 | } | |
3202 | ||
726f6388 JA |
3203 | /* Start a job. FOREGROUND if non-zero says to do that. Otherwise, |
3204 | start the job in the background. JOB is a zero-based index into | |
3205 | JOBS. Returns -1 if it is unable to start a job, and the return | |
3206 | status of the job otherwise. */ | |
3207 | int | |
3208 | start_job (job, foreground) | |
3209 | int job, foreground; | |
3210 | { | |
3211 | register PROCESS *p; | |
3212 | int already_running; | |
3213 | sigset_t set, oset; | |
95732b49 | 3214 | char *wd, *s; |
28ef6c31 | 3215 | static TTYSTRUCT save_stty; |
726f6388 JA |
3216 | |
3217 | BLOCK_CHILD (set, oset); | |
726f6388 | 3218 | |
ccc6cda3 | 3219 | if (DEADJOB (job)) |
726f6388 | 3220 | { |
b80f6443 | 3221 | internal_error (_("%s: job has terminated"), this_command_name); |
726f6388 JA |
3222 | UNBLOCK_CHILD (oset); |
3223 | return (-1); | |
3224 | } | |
3225 | ||
ccc6cda3 JA |
3226 | already_running = RUNNING (job); |
3227 | ||
3228 | if (foreground == 0 && already_running) | |
726f6388 | 3229 | { |
b80f6443 | 3230 | internal_error (_("%s: job %d already in background"), this_command_name, job + 1); |
726f6388 | 3231 | UNBLOCK_CHILD (oset); |
95732b49 | 3232 | return (0); /* XPG6/SUSv3 says this is not an error */ |
726f6388 JA |
3233 | } |
3234 | ||
3235 | wd = current_working_directory (); | |
3236 | ||
3237 | /* You don't know about the state of this job. Do you? */ | |
3238 | jobs[job]->flags &= ~J_NOTIFIED; | |
3239 | ||
3240 | if (foreground) | |
3241 | { | |
3242 | set_current_job (job); | |
3243 | jobs[job]->flags |= J_FOREGROUND; | |
3244 | } | |
3245 | ||
3246 | /* Tell the outside world what we're doing. */ | |
3247 | p = jobs[job]->pipe; | |
3248 | ||
ccc6cda3 | 3249 | if (foreground == 0) |
95732b49 JA |
3250 | { |
3251 | /* POSIX.2 says `bg' doesn't give any indication about current or | |
3252 | previous job. */ | |
3253 | if (posixly_correct == 0) | |
3254 | s = (job == js.j_current) ? "+ ": ((job == js.j_previous) ? "- " : " "); | |
3255 | else | |
3256 | s = " "; | |
3257 | printf ("[%d]%s", job + 1, s); | |
3258 | } | |
726f6388 JA |
3259 | |
3260 | do | |
3261 | { | |
95732b49 | 3262 | printf ("%s%s", |
726f6388 JA |
3263 | p->command ? p->command : "", |
3264 | p->next != jobs[job]->pipe? " | " : ""); | |
3265 | p = p->next; | |
3266 | } | |
3267 | while (p != jobs[job]->pipe); | |
3268 | ||
ccc6cda3 | 3269 | if (foreground == 0) |
95732b49 | 3270 | printf (" &"); |
726f6388 JA |
3271 | |
3272 | if (strcmp (wd, jobs[job]->wd) != 0) | |
95732b49 | 3273 | printf (" (wd: %s)", polite_directory_format (jobs[job]->wd)); |
726f6388 | 3274 | |
95732b49 | 3275 | printf ("\n"); |
726f6388 JA |
3276 | |
3277 | /* Run the job. */ | |
ccc6cda3 | 3278 | if (already_running == 0) |
d166f048 | 3279 | set_job_running (job); |
726f6388 JA |
3280 | |
3281 | /* Save the tty settings before we start the job in the foreground. */ | |
3282 | if (foreground) | |
3283 | { | |
3284 | get_tty_state (); | |
3285 | save_stty = shell_tty_info; | |
ccc6cda3 JA |
3286 | /* Give the terminal to this job. */ |
3287 | if (IS_JOBCONTROL (job)) | |
28ef6c31 | 3288 | give_terminal_to (jobs[job]->pgrp, 0); |
726f6388 JA |
3289 | } |
3290 | else | |
3291 | jobs[job]->flags &= ~J_FOREGROUND; | |
3292 | ||
3293 | /* If the job is already running, then don't bother jump-starting it. */ | |
ccc6cda3 | 3294 | if (already_running == 0) |
726f6388 JA |
3295 | { |
3296 | jobs[job]->flags |= J_NOTIFIED; | |
3297 | killpg (jobs[job]->pgrp, SIGCONT); | |
3298 | } | |
3299 | ||
726f6388 JA |
3300 | if (foreground) |
3301 | { | |
ccc6cda3 | 3302 | pid_t pid; |
0628567a | 3303 | int st; |
726f6388 | 3304 | |
7117c2d2 JA |
3305 | pid = find_last_pid (job, 0); |
3306 | UNBLOCK_CHILD (oset); | |
0628567a | 3307 | st = wait_for (pid); |
726f6388 JA |
3308 | shell_tty_info = save_stty; |
3309 | set_tty_state (); | |
0628567a | 3310 | return (st); |
726f6388 JA |
3311 | } |
3312 | else | |
3313 | { | |
726f6388 JA |
3314 | reset_current (); |
3315 | UNBLOCK_CHILD (oset); | |
3316 | return (0); | |
3317 | } | |
3318 | } | |
3319 | ||
3320 | /* Give PID SIGNAL. This determines what job the pid belongs to (if any). | |
3321 | If PID does belong to a job, and the job is stopped, then CONTinue the | |
3322 | job after giving it SIGNAL. Returns -1 on failure. If GROUP is non-null, | |
3323 | then kill the process group associated with PID. */ | |
3324 | int | |
3325 | kill_pid (pid, sig, group) | |
3326 | pid_t pid; | |
3327 | int sig, group; | |
3328 | { | |
3329 | register PROCESS *p; | |
95732b49 | 3330 | int job, result, negative; |
726f6388 JA |
3331 | sigset_t set, oset; |
3332 | ||
95732b49 JA |
3333 | if (pid < -1) |
3334 | { | |
3335 | pid = -pid; | |
3336 | group = negative = 1; | |
3337 | } | |
3338 | else | |
3339 | negative = 0; | |
3340 | ||
ccc6cda3 | 3341 | result = EXECUTION_SUCCESS; |
726f6388 JA |
3342 | if (group) |
3343 | { | |
f73dda09 | 3344 | BLOCK_CHILD (set, oset); |
7117c2d2 | 3345 | p = find_pipeline (pid, 0, &job); |
f73dda09 | 3346 | |
726f6388 JA |
3347 | if (job != NO_JOB) |
3348 | { | |
3349 | jobs[job]->flags &= ~J_NOTIFIED; | |
3350 | ||
3351 | /* Kill process in backquotes or one started without job control? */ | |
95732b49 JA |
3352 | |
3353 | /* If we're passed a pid < -1, just call killpg and see what happens */ | |
3354 | if (negative && jobs[job]->pgrp == shell_pgrp) | |
3355 | result = killpg (pid, sig); | |
3356 | /* If we're killing using job control notification, for example, | |
3357 | without job control active, we have to do things ourselves. */ | |
3358 | else if (jobs[job]->pgrp == shell_pgrp) | |
726f6388 JA |
3359 | { |
3360 | p = jobs[job]->pipe; | |
726f6388 JA |
3361 | do |
3362 | { | |
95732b49 JA |
3363 | if (PALIVE (p) == 0) |
3364 | continue; /* avoid pid recycling problem */ | |
726f6388 | 3365 | kill (p->pid, sig); |
95732b49 | 3366 | if (PEXITED (p) && (sig == SIGTERM || sig == SIGHUP)) |
726f6388 JA |
3367 | kill (p->pid, SIGCONT); |
3368 | p = p->next; | |
3369 | } | |
95732b49 | 3370 | while (p != jobs[job]->pipe); |
726f6388 JA |
3371 | } |
3372 | else | |
3373 | { | |
3374 | result = killpg (jobs[job]->pgrp, sig); | |
ccc6cda3 | 3375 | if (p && STOPPED (job) && (sig == SIGTERM || sig == SIGHUP)) |
726f6388 | 3376 | killpg (jobs[job]->pgrp, SIGCONT); |
d166f048 JA |
3377 | /* If we're continuing a stopped job via kill rather than bg or |
3378 | fg, emulate the `bg' behavior. */ | |
3379 | if (p && STOPPED (job) && (sig == SIGCONT)) | |
3380 | { | |
3381 | set_job_running (job); | |
3382 | jobs[job]->flags &= ~J_FOREGROUND; | |
3383 | jobs[job]->flags |= J_NOTIFIED; | |
3384 | } | |
726f6388 JA |
3385 | } |
3386 | } | |
3387 | else | |
3388 | result = killpg (pid, sig); | |
f73dda09 JA |
3389 | |
3390 | UNBLOCK_CHILD (oset); | |
726f6388 JA |
3391 | } |
3392 | else | |
3393 | result = kill (pid, sig); | |
3394 | ||
726f6388 JA |
3395 | return (result); |
3396 | } | |
3397 | ||
ccc6cda3 JA |
3398 | /* sigchld_handler () flushes at least one of the children that we are |
3399 | waiting for. It gets run when we have gotten a SIGCHLD signal. */ | |
726f6388 | 3400 | static sighandler |
ccc6cda3 | 3401 | sigchld_handler (sig) |
726f6388 JA |
3402 | int sig; |
3403 | { | |
bb70624e | 3404 | int n, oerrno; |
ccc6cda3 | 3405 | |
bb70624e | 3406 | oerrno = errno; |
726f6388 JA |
3407 | REINSTALL_SIGCHLD_HANDLER; |
3408 | sigchld++; | |
ccc6cda3 | 3409 | n = 0; |
7117c2d2 | 3410 | if (queue_sigchld == 0) |
ccc6cda3 | 3411 | n = waitchld (-1, 0); |
bb70624e | 3412 | errno = oerrno; |
ccc6cda3 | 3413 | SIGRETURN (n); |
726f6388 | 3414 | } |
ccc6cda3 JA |
3415 | |
3416 | /* waitchld() reaps dead or stopped children. It's called by wait_for and | |
bb70624e JA |
3417 | sigchld_handler, and runs until there aren't any children terminating any |
3418 | more. | |
ccc6cda3 | 3419 | If BLOCK is 1, this is to be a blocking wait for a single child, although |
bb70624e JA |
3420 | an arriving SIGCHLD could cause the wait to be non-blocking. It returns |
3421 | the number of children reaped, or -1 if there are no unwaited-for child | |
3422 | processes. */ | |
726f6388 | 3423 | static int |
ccc6cda3 JA |
3424 | waitchld (wpid, block) |
3425 | pid_t wpid; | |
3426 | int block; | |
726f6388 JA |
3427 | { |
3428 | WAIT status; | |
3429 | PROCESS *child; | |
3430 | pid_t pid; | |
ac50fbac | 3431 | |
28ef6c31 | 3432 | int call_set_current, last_stopped_job, job, children_exited, waitpid_flags; |
95732b49 | 3433 | static int wcontinued = WCONTINUED; /* run-time fix for glibc problem */ |
ccc6cda3 JA |
3434 | |
3435 | call_set_current = children_exited = 0; | |
3436 | last_stopped_job = NO_JOB; | |
726f6388 JA |
3437 | |
3438 | do | |
3439 | { | |
d166f048 | 3440 | /* We don't want to be notified about jobs stopping if job control |
28ef6c31 | 3441 | is not active. XXX - was interactive_shell instead of job_control */ |
d166f048 | 3442 | waitpid_flags = (job_control && subshell_environment == 0) |
95732b49 | 3443 | ? (WUNTRACED|wcontinued) |
ccc6cda3 JA |
3444 | : 0; |
3445 | if (sigchld || block == 0) | |
3446 | waitpid_flags |= WNOHANG; | |
ac50fbac | 3447 | |
0001803f | 3448 | /* Check for terminating signals and exit the shell if we receive one */ |
0628567a | 3449 | CHECK_TERMSIG; |
ac50fbac CR |
3450 | /* Check for a trapped signal interrupting the wait builtin and jump out */ |
3451 | CHECK_WAIT_INTR; | |
3185942a | 3452 | |
0001803f CR |
3453 | if (block == 1 && queue_sigchld == 0 && (waitpid_flags & WNOHANG) == 0) |
3454 | { | |
3455 | internal_warning (_("waitchld: turning on WNOHANG to avoid indefinite block")); | |
3456 | waitpid_flags |= WNOHANG; | |
3457 | } | |
3458 | ||
ccc6cda3 | 3459 | pid = WAITPID (-1, &status, waitpid_flags); |
f73dda09 | 3460 | |
ac50fbac CR |
3461 | #if 0 |
3462 | if (wpid != -1 && block) | |
3463 | itrace("waitchld: blocking waitpid returns %d", pid); | |
a0c0a00f CR |
3464 | #endif |
3465 | #if 0 | |
3466 | if (wpid != -1) | |
3467 | itrace("waitchld: %s waitpid returns %d", block?"blocking":"non-blocking", pid); | |
ac50fbac | 3468 | #endif |
95732b49 JA |
3469 | /* WCONTINUED may be rejected by waitpid as invalid even when defined */ |
3470 | if (wcontinued && pid < 0 && errno == EINVAL) | |
3471 | { | |
3472 | wcontinued = 0; | |
3473 | continue; /* jump back to the test and retry without WCONTINUED */ | |
3474 | } | |
3475 | ||
ccc6cda3 JA |
3476 | /* The check for WNOHANG is to make sure we decrement sigchld only |
3477 | if it was non-zero before we called waitpid. */ | |
3478 | if (sigchld > 0 && (waitpid_flags & WNOHANG)) | |
3479 | sigchld--; | |
ac50fbac | 3480 | |
bb70624e JA |
3481 | /* If waitpid returns -1 with errno == ECHILD, there are no more |
3482 | unwaited-for child processes of this shell. */ | |
3483 | if (pid < 0 && errno == ECHILD) | |
3484 | { | |
3485 | if (children_exited == 0) | |
3486 | return -1; | |
3487 | else | |
3488 | break; | |
3489 | } | |
ccc6cda3 | 3490 | |
ac50fbac | 3491 | #if 0 |
a0c0a00f | 3492 | itrace("waitchld: waitpid returns %d block = %d children_exited = %d", pid, block, children_exited); |
ac50fbac | 3493 | #endif |
bb70624e JA |
3494 | /* If waitpid returns 0, there are running children. If it returns -1, |
3495 | the only other error POSIX says it can return is EINTR. */ | |
0628567a | 3496 | CHECK_TERMSIG; |
ac50fbac CR |
3497 | CHECK_WAIT_INTR; |
3498 | ||
3499 | /* If waitpid returns -1/EINTR and the shell saw a SIGINT, then we | |
3500 | assume the child has blocked or handled SIGINT. In that case, we | |
3501 | require the child to actually die due to SIGINT to act on the | |
3502 | SIGINT we received; otherwise we assume the child handled it and | |
3503 | let it go. */ | |
3504 | if (pid < 0 && errno == EINTR && wait_sigint_received) | |
3505 | child_caught_sigint = 1; | |
3506 | ||
ccc6cda3 JA |
3507 | if (pid <= 0) |
3508 | continue; /* jumps right to the test */ | |
3509 | ||
a0c0a00f CR |
3510 | /* Linux kernels appear to signal the parent but not interrupt the |
3511 | waitpid() (or restart it even without SA_RESTART) on SIGINT, so if | |
3512 | we saw a SIGINT and the process exited or died due to some other | |
3513 | signal, assume the child caught the SIGINT. */ | |
3514 | if (wait_sigint_received && (WIFSIGNALED (status) == 0 || WTERMSIG (status) != SIGINT)) | |
3515 | child_caught_sigint = 1; | |
3516 | ||
ac50fbac CR |
3517 | /* If the child process did die due to SIGINT, forget our assumption |
3518 | that it caught or otherwise handled it. */ | |
3519 | if (WIFSIGNALED (status) && WTERMSIG (status) == SIGINT) | |
3520 | child_caught_sigint = 0; | |
3521 | ||
f73dda09 JA |
3522 | /* children_exited is used to run traps on SIGCHLD. We don't want to |
3523 | run the trap if a process is just being continued. */ | |
3524 | if (WIFCONTINUED(status) == 0) | |
0628567a JA |
3525 | { |
3526 | children_exited++; | |
3527 | js.c_living--; | |
3528 | } | |
ccc6cda3 JA |
3529 | |
3530 | /* Locate our PROCESS for this pid. */ | |
95732b49 | 3531 | child = find_process (pid, 1, &job); /* want living procs only */ |
ccc6cda3 | 3532 | |
3185942a | 3533 | #if defined (COPROCESS_SUPPORT) |
ac50fbac | 3534 | coproc_pidchk (pid, WSTATUS(status)); |
3185942a JA |
3535 | #endif |
3536 | ||
ccc6cda3 JA |
3537 | /* It is not an error to have a child terminate that we did |
3538 | not have a record of. This child could have been part of | |
3539 | a pipeline in backquote substitution. Even so, I'm not | |
3540 | sure child is ever non-zero. */ | |
3541 | if (child == 0) | |
3185942a JA |
3542 | { |
3543 | if (WIFEXITED (status) || WIFSIGNALED (status)) | |
3544 | js.c_reaped++; | |
3545 | continue; | |
3546 | } | |
ccc6cda3 | 3547 | |
f73dda09 | 3548 | /* Remember status, and whether or not the process is running. */ |
ccc6cda3 | 3549 | child->status = status; |
7117c2d2 | 3550 | child->running = WIFCONTINUED(status) ? PS_RUNNING : PS_DONE; |
ccc6cda3 | 3551 | |
95732b49 JA |
3552 | if (PEXITED (child)) |
3553 | { | |
3554 | js.c_totreaped++; | |
3555 | if (job != NO_JOB) | |
3556 | js.c_reaped++; | |
3557 | } | |
a0c0a00f | 3558 | |
ccc6cda3 | 3559 | if (job == NO_JOB) |
28ef6c31 | 3560 | continue; |
726f6388 | 3561 | |
28ef6c31 | 3562 | call_set_current += set_job_status_and_cleanup (job); |
726f6388 | 3563 | |
28ef6c31 JA |
3564 | if (STOPPED (job)) |
3565 | last_stopped_job = job; | |
3566 | else if (DEADJOB (job) && last_stopped_job == job) | |
3567 | last_stopped_job = NO_JOB; | |
726f6388 | 3568 | } |
ccc6cda3 | 3569 | while ((sigchld || block == 0) && pid > (pid_t)0); |
726f6388 JA |
3570 | |
3571 | /* If a job was running and became stopped, then set the current | |
3572 | job. Otherwise, don't change a thing. */ | |
3573 | if (call_set_current) | |
bb70624e JA |
3574 | { |
3575 | if (last_stopped_job != NO_JOB) | |
3576 | set_current_job (last_stopped_job); | |
3577 | else | |
3578 | reset_current (); | |
3579 | } | |
726f6388 JA |
3580 | |
3581 | /* Call a SIGCHLD trap handler for each child that exits, if one is set. */ | |
a0c0a00f CR |
3582 | if (job_control && children_exited && |
3583 | (signal_is_trapped (SIGCHLD) || trap_list[SIGCHLD] == (char *)IMPOSSIBLE_TRAP_HANDLER) && | |
726f6388 | 3584 | trap_list[SIGCHLD] != (char *)IGNORE_SIG) |
3185942a | 3585 | { |
0001803f | 3586 | if (posixly_correct && this_shell_builtin && this_shell_builtin == wait_builtin) |
3185942a JA |
3587 | { |
3588 | interrupt_immediately = 0; | |
d836e8a2 CR |
3589 | /* This was trap_handler (SIGCHLD) but that can lose traps if |
3590 | children_exited > 1 */ | |
3591 | queue_sigchld_trap (children_exited); | |
3185942a | 3592 | wait_signal_received = SIGCHLD; |
ac50fbac CR |
3593 | /* If we're in a signal handler, let CHECK_WAIT_INTR pick it up; |
3594 | run_pending_traps will call run_sigchld_trap later */ | |
a0c0a00f CR |
3595 | if (sigchld == 0 && wait_intr_flag) |
3596 | sh_longjmp (wait_intr_buf, 1); | |
3185942a | 3597 | } |
ac50fbac CR |
3598 | /* If not in posix mode and not executing the wait builtin, queue the |
3599 | signal for later handling. Run the trap immediately if we are | |
3600 | executing the wait builtin, but don't break out of `wait'. */ | |
3601 | else if (sigchld) /* called from signal handler */ | |
3602 | queue_sigchld_trap (children_exited); | |
a0c0a00f CR |
3603 | else if (signal_in_progress (SIGCHLD)) |
3604 | queue_sigchld_trap (children_exited); | |
3605 | else if (trap_list[SIGCHLD] == (char *)IMPOSSIBLE_TRAP_HANDLER) | |
3606 | queue_sigchld_trap (children_exited); | |
ac50fbac CR |
3607 | else if (running_trap) |
3608 | queue_sigchld_trap (children_exited); | |
3609 | else if (this_shell_builtin == wait_builtin) | |
3610 | run_sigchld_trap (children_exited); /* XXX */ | |
3611 | else | |
3612 | queue_sigchld_trap (children_exited); | |
3185942a | 3613 | } |
726f6388 JA |
3614 | |
3615 | /* We have successfully recorded the useful information about this process | |
3616 | that has just changed state. If we notify asynchronously, and the job | |
3617 | that this process belongs to is no longer running, then notify the user | |
3618 | of that fact now. */ | |
3619 | if (asynchronous_notification && interactive) | |
3620 | notify_of_job_status (); | |
3621 | ||
ccc6cda3 | 3622 | return (children_exited); |
726f6388 JA |
3623 | } |
3624 | ||
28ef6c31 JA |
3625 | /* Set the status of JOB and perform any necessary cleanup if the job is |
3626 | marked as JDEAD. | |
3627 | ||
3628 | Currently, the cleanup activity is restricted to handling any SIGINT | |
3629 | received while waiting for a foreground job to finish. */ | |
3630 | static int | |
3631 | set_job_status_and_cleanup (job) | |
3632 | int job; | |
3633 | { | |
3634 | PROCESS *child; | |
3635 | int tstatus, job_state, any_stopped, any_tstped, call_set_current; | |
3636 | SigHandler *temp_handler; | |
3637 | ||
3638 | child = jobs[job]->pipe; | |
3639 | jobs[job]->flags &= ~J_NOTIFIED; | |
3640 | ||
3641 | call_set_current = 0; | |
3642 | ||
3643 | /* | |
3644 | * COMPUTE JOB STATUS | |
3645 | */ | |
3646 | ||
3647 | /* If all children are not running, but any of them is stopped, then | |
3648 | the job is stopped, not dead. */ | |
3649 | job_state = any_stopped = any_tstped = 0; | |
3650 | do | |
3651 | { | |
95732b49 JA |
3652 | job_state |= PRUNNING (child); |
3653 | #if 0 | |
3654 | if (PEXITED (child) && (WIFSTOPPED (child->status))) | |
3655 | #else | |
3656 | /* Only checking for WIFSTOPPED now, not for PS_DONE */ | |
3657 | if (PSTOPPED (child)) | |
3658 | #endif | |
28ef6c31 JA |
3659 | { |
3660 | any_stopped = 1; | |
ac50fbac | 3661 | any_tstped |= job_control && (WSTOPSIG (child->status) == SIGTSTP); |
28ef6c31 JA |
3662 | } |
3663 | child = child->next; | |
3664 | } | |
3665 | while (child != jobs[job]->pipe); | |
3666 | ||
3667 | /* If job_state != 0, the job is still running, so don't bother with | |
f73dda09 JA |
3668 | setting the process exit status and job state unless we're |
3669 | transitioning from stopped to running. */ | |
3670 | if (job_state != 0 && JOBSTATE(job) != JSTOPPED) | |
28ef6c31 JA |
3671 | return 0; |
3672 | ||
3673 | /* | |
3674 | * SET JOB STATUS | |
3675 | */ | |
3676 | ||
3677 | /* The job is either stopped or dead. Set the state of the job accordingly. */ | |
3678 | if (any_stopped) | |
3679 | { | |
3680 | jobs[job]->state = JSTOPPED; | |
3681 | jobs[job]->flags &= ~J_FOREGROUND; | |
3682 | call_set_current++; | |
3683 | /* Suspending a job with SIGTSTP breaks all active loops. */ | |
3684 | if (any_tstped && loop_level) | |
3685 | breaking = loop_level; | |
3686 | } | |
f73dda09 JA |
3687 | else if (job_state != 0) /* was stopped, now running */ |
3688 | { | |
3689 | jobs[job]->state = JRUNNING; | |
3690 | call_set_current++; | |
3691 | } | |
28ef6c31 JA |
3692 | else |
3693 | { | |
3694 | jobs[job]->state = JDEAD; | |
95732b49 | 3695 | js.j_ndead++; |
28ef6c31 | 3696 | |
7117c2d2 | 3697 | #if 0 |
28ef6c31 JA |
3698 | if (IS_FOREGROUND (job)) |
3699 | setjstatus (job); | |
7117c2d2 | 3700 | #endif |
28ef6c31 JA |
3701 | |
3702 | /* If this job has a cleanup function associated with it, call it | |
3703 | with `cleanarg' as the single argument, then set the function | |
3704 | pointer to NULL so it is not inadvertently called twice. The | |
3705 | cleanup function is responsible for deallocating cleanarg. */ | |
3706 | if (jobs[job]->j_cleanup) | |
3707 | { | |
3708 | (*jobs[job]->j_cleanup) (jobs[job]->cleanarg); | |
f73dda09 | 3709 | jobs[job]->j_cleanup = (sh_vptrfunc_t *)NULL; |
28ef6c31 JA |
3710 | } |
3711 | } | |
3712 | ||
3713 | /* | |
3714 | * CLEANUP | |
3715 | * | |
3716 | * Currently, we just do special things if we got a SIGINT while waiting | |
3717 | * for a foreground job to complete | |
3718 | */ | |
3719 | ||
95732b49 | 3720 | if (JOBSTATE (job) == JDEAD) |
28ef6c31 JA |
3721 | { |
3722 | /* If we're running a shell script and we get a SIGINT with a | |
3723 | SIGINT trap handler, but the foreground job handles it and | |
3724 | does not exit due to SIGINT, run the trap handler but do not | |
3725 | otherwise act as if we got the interrupt. */ | |
3726 | if (wait_sigint_received && interactive_shell == 0 && | |
ac50fbac | 3727 | child_caught_sigint && IS_FOREGROUND (job) && |
28ef6c31 JA |
3728 | signal_is_trapped (SIGINT)) |
3729 | { | |
7117c2d2 | 3730 | int old_frozen; |
28ef6c31 JA |
3731 | wait_sigint_received = 0; |
3732 | last_command_exit_value = process_exit_status (child->status); | |
3733 | ||
7117c2d2 | 3734 | old_frozen = jobs_list_frozen; |
28ef6c31 JA |
3735 | jobs_list_frozen = 1; |
3736 | tstatus = maybe_call_trap_handler (SIGINT); | |
7117c2d2 | 3737 | jobs_list_frozen = old_frozen; |
28ef6c31 JA |
3738 | } |
3739 | ||
3740 | /* If the foreground job is killed by SIGINT when job control is not | |
3741 | active, we need to perform some special handling. | |
3742 | ||
3743 | The check of wait_sigint_received is a way to determine if the | |
3744 | SIGINT came from the keyboard (in which case the shell has already | |
3745 | seen it, and wait_sigint_received is non-zero, because keyboard | |
3746 | signals are sent to process groups) or via kill(2) to the foreground | |
3747 | process by another process (or itself). If the shell did receive the | |
a0c0a00f CR |
3748 | SIGINT, it needs to perform normal SIGINT processing. XXX - should |
3749 | this change its behavior depending on whether the last command in an | |
3750 | pipeline exited due to SIGINT, or any process in the pipeline? Right | |
3751 | now it does this if any process in the pipeline exits due to SIGINT. */ | |
ac50fbac CR |
3752 | else if (wait_sigint_received && |
3753 | child_caught_sigint == 0 && | |
28ef6c31 JA |
3754 | IS_FOREGROUND (job) && IS_JOBCONTROL (job) == 0) |
3755 | { | |
7117c2d2 JA |
3756 | int old_frozen; |
3757 | ||
28ef6c31 JA |
3758 | wait_sigint_received = 0; |
3759 | ||
3760 | /* If SIGINT is trapped, set the exit status so that the trap | |
3761 | handler can see it. */ | |
3762 | if (signal_is_trapped (SIGINT)) | |
3763 | last_command_exit_value = process_exit_status (child->status); | |
3764 | ||
3765 | /* If the signal is trapped, let the trap handler get it no matter | |
3766 | what and simply return if the trap handler returns. | |
3767 | maybe_call_trap_handler() may cause dead jobs to be removed from | |
3768 | the job table because of a call to execute_command. We work | |
3769 | around this by setting JOBS_LIST_FROZEN. */ | |
7117c2d2 | 3770 | old_frozen = jobs_list_frozen; |
28ef6c31 JA |
3771 | jobs_list_frozen = 1; |
3772 | tstatus = maybe_call_trap_handler (SIGINT); | |
7117c2d2 | 3773 | jobs_list_frozen = old_frozen; |
28ef6c31 JA |
3774 | if (tstatus == 0 && old_sigint_handler != INVALID_SIGNAL_HANDLER) |
3775 | { | |
3776 | /* wait_sigint_handler () has already seen SIGINT and | |
3777 | allowed the wait builtin to jump out. We need to | |
3778 | call the original SIGINT handler, if necessary. If | |
3779 | the original handler is SIG_DFL, we need to resend | |
3780 | the signal to ourselves. */ | |
3781 | ||
3782 | temp_handler = old_sigint_handler; | |
3783 | ||
3784 | /* Bogus. If we've reset the signal handler as the result | |
3785 | of a trap caught on SIGINT, then old_sigint_handler | |
3786 | will point to trap_handler, which now knows nothing about | |
3787 | SIGINT (if we reset the sighandler to the default). | |
3788 | In this case, we have to fix things up. What a crock. */ | |
3789 | if (temp_handler == trap_handler && signal_is_trapped (SIGINT) == 0) | |
3790 | temp_handler = trap_to_sighandler (SIGINT); | |
a0c0a00f | 3791 | restore_sigint_handler (); |
95732b49 | 3792 | if (temp_handler == SIG_DFL) |
ac50fbac | 3793 | termsig_handler (SIGINT); /* XXX */ |
95732b49 JA |
3794 | else if (temp_handler != SIG_IGN) |
3795 | (*temp_handler) (SIGINT); | |
28ef6c31 JA |
3796 | } |
3797 | } | |
3798 | } | |
3799 | ||
3800 | return call_set_current; | |
3801 | } | |
3802 | ||
3803 | /* Build the array of values for the $PIPESTATUS variable from the set of | |
3804 | exit statuses of all processes in the job J. */ | |
3805 | static void | |
3806 | setjstatus (j) | |
3807 | int j; | |
3808 | { | |
3809 | #if defined (ARRAY_VARS) | |
3810 | register int i; | |
3811 | register PROCESS *p; | |
3812 | ||
3813 | for (i = 1, p = jobs[j]->pipe; p->next != jobs[j]->pipe; p = p->next, i++) | |
3814 | ; | |
3815 | i++; | |
7117c2d2 | 3816 | if (statsize < i) |
28ef6c31 JA |
3817 | { |
3818 | pstatuses = (int *)xrealloc (pstatuses, i * sizeof (int)); | |
3819 | statsize = i; | |
3820 | } | |
3821 | i = 0; | |
3822 | p = jobs[j]->pipe; | |
3823 | do | |
3824 | { | |
3825 | pstatuses[i++] = process_exit_status (p->status); | |
3826 | p = p->next; | |
3827 | } | |
3828 | while (p != jobs[j]->pipe); | |
3829 | ||
3830 | pstatuses[i] = -1; /* sentinel */ | |
7117c2d2 | 3831 | set_pipestatus_array (pstatuses, i); |
28ef6c31 JA |
3832 | #endif |
3833 | } | |
3834 | ||
3185942a | 3835 | void |
28ef6c31 JA |
3836 | run_sigchld_trap (nchild) |
3837 | int nchild; | |
3838 | { | |
3839 | char *trap_command; | |
3840 | int i; | |
3841 | ||
3842 | /* Turn off the trap list during the call to parse_and_execute () | |
3843 | to avoid potentially infinite recursive calls. Preserve the | |
3844 | values of last_command_exit_value, last_made_pid, and the_pipeline | |
3845 | around the execution of the trap commands. */ | |
3846 | trap_command = savestring (trap_list[SIGCHLD]); | |
3847 | ||
3848 | begin_unwind_frame ("SIGCHLD trap"); | |
3849 | unwind_protect_int (last_command_exit_value); | |
b80f6443 | 3850 | unwind_protect_int (last_command_exit_signal); |
f73dda09 | 3851 | unwind_protect_var (last_made_pid); |
28ef6c31 JA |
3852 | unwind_protect_int (interrupt_immediately); |
3853 | unwind_protect_int (jobs_list_frozen); | |
3854 | unwind_protect_pointer (the_pipeline); | |
3855 | unwind_protect_pointer (subst_assign_varlist); | |
4a741ca4 | 3856 | unwind_protect_pointer (this_shell_builtin); |
a0c0a00f | 3857 | unwind_protect_pointer (temporary_env); |
28ef6c31 JA |
3858 | |
3859 | /* We have to add the commands this way because they will be run | |
3860 | in reverse order of adding. We don't want maybe_set_sigchld_trap () | |
3861 | to reference freed memory. */ | |
b80f6443 JA |
3862 | add_unwind_protect (xfree, trap_command); |
3863 | add_unwind_protect (maybe_set_sigchld_trap, trap_command); | |
28ef6c31 JA |
3864 | |
3865 | subst_assign_varlist = (WORD_LIST *)NULL; | |
3866 | the_pipeline = (PROCESS *)NULL; | |
a0c0a00f | 3867 | temporary_env = 0; /* traps should not run with temporary env */ |
28ef6c31 | 3868 | |
ac50fbac CR |
3869 | running_trap = SIGCHLD + 1; |
3870 | ||
3185942a | 3871 | set_impossible_sigchld_trap (); |
28ef6c31 JA |
3872 | jobs_list_frozen = 1; |
3873 | for (i = 0; i < nchild; i++) | |
3874 | { | |
ac50fbac | 3875 | #if 0 |
28ef6c31 | 3876 | interrupt_immediately = 1; |
ac50fbac | 3877 | #endif |
b80f6443 | 3878 | parse_and_execute (savestring (trap_command), "trap", SEVAL_NOHIST|SEVAL_RESETLINE); |
28ef6c31 JA |
3879 | } |
3880 | ||
3881 | run_unwind_frame ("SIGCHLD trap"); | |
ac50fbac | 3882 | running_trap = 0; |
28ef6c31 JA |
3883 | } |
3884 | ||
726f6388 JA |
3885 | /* Function to call when you want to notify people of changes |
3886 | in job status. This prints out all jobs which are pending | |
3887 | notification to stderr, and marks those printed as already | |
3888 | notified, thus making them candidates for cleanup. */ | |
3889 | static void | |
3890 | notify_of_job_status () | |
3891 | { | |
3892 | register int job, termsig; | |
3893 | char *dir; | |
3894 | sigset_t set, oset; | |
ccc6cda3 | 3895 | WAIT s; |
726f6388 | 3896 | |
95732b49 | 3897 | if (jobs == 0 || js.j_jobslots == 0) |
28ef6c31 JA |
3898 | return; |
3899 | ||
7117c2d2 JA |
3900 | if (old_ttou != 0) |
3901 | { | |
3902 | sigemptyset (&set); | |
3903 | sigaddset (&set, SIGCHLD); | |
3904 | sigaddset (&set, SIGTTOU); | |
3905 | sigemptyset (&oset); | |
3906 | sigprocmask (SIG_BLOCK, &set, &oset); | |
3907 | } | |
3908 | else | |
3909 | queue_sigchld++; | |
726f6388 | 3910 | |
95732b49 JA |
3911 | /* XXX could use js.j_firstj here */ |
3912 | for (job = 0, dir = (char *)NULL; job < js.j_jobslots; job++) | |
726f6388 | 3913 | { |
ccc6cda3 | 3914 | if (jobs[job] && IS_NOTIFIED (job) == 0) |
726f6388 | 3915 | { |
bb70624e | 3916 | s = raw_job_exit_status (job); |
726f6388 JA |
3917 | termsig = WTERMSIG (s); |
3918 | ||
b72432fd JA |
3919 | /* POSIX.2 says we have to hang onto the statuses of at most the |
3920 | last CHILD_MAX background processes if the shell is running a | |
95732b49 JA |
3921 | script. If the shell is running a script, either from a file |
3922 | or standard input, don't print anything unless the job was | |
3923 | killed by a signal. */ | |
b72432fd JA |
3924 | if (startup_state == 0 && WIFSIGNALED (s) == 0 && |
3925 | ((DEADJOB (job) && IS_FOREGROUND (job) == 0) || STOPPED (job))) | |
3926 | continue; | |
3927 | ||
b80f6443 | 3928 | #if 0 |
726f6388 | 3929 | /* If job control is disabled, don't print the status messages. |
ccc6cda3 JA |
3930 | Mark dead jobs as notified so that they get cleaned up. If |
3931 | startup_state == 2, we were started to run `-c command', so | |
b72432fd JA |
3932 | don't print anything. */ |
3933 | if ((job_control == 0 && interactive_shell) || startup_state == 2) | |
b80f6443 JA |
3934 | #else |
3935 | /* If job control is disabled, don't print the status messages. | |
3936 | Mark dead jobs as notified so that they get cleaned up. If | |
3937 | startup_state == 2 and subshell_environment has the | |
3938 | SUBSHELL_COMSUB bit turned on, we were started to run a command | |
3939 | substitution, so don't print anything. */ | |
3940 | if ((job_control == 0 && interactive_shell) || | |
3941 | (startup_state == 2 && (subshell_environment & SUBSHELL_COMSUB))) | |
3942 | #endif | |
726f6388 | 3943 | { |
cce855bc JA |
3944 | /* POSIX.2 compatibility: if the shell is not interactive, |
3945 | hang onto the job corresponding to the last asynchronous | |
3946 | pid until the user has been notified of its status or does | |
3947 | a `wait'. */ | |
7117c2d2 | 3948 | if (DEADJOB (job) && (interactive_shell || (find_last_pid (job, 0) != last_asynchronous_pid))) |
726f6388 JA |
3949 | jobs[job]->flags |= J_NOTIFIED; |
3950 | continue; | |
3951 | } | |
3952 | ||
ccc6cda3 JA |
3953 | /* Print info on jobs that are running in the background, |
3954 | and on foreground jobs that were killed by anything | |
d166f048 | 3955 | except SIGINT (and possibly SIGPIPE). */ |
726f6388 JA |
3956 | switch (JOBSTATE (job)) |
3957 | { | |
726f6388 | 3958 | case JDEAD: |
ccc6cda3 | 3959 | if (interactive_shell == 0 && termsig && WIFSIGNALED (s) && |
cce855bc | 3960 | termsig != SIGINT && |
ac50fbac CR |
3961 | #if defined (DONT_REPORT_SIGTERM) |
3962 | termsig != SIGTERM && | |
3963 | #endif | |
cce855bc JA |
3964 | #if defined (DONT_REPORT_SIGPIPE) |
3965 | termsig != SIGPIPE && | |
3966 | #endif | |
ccc6cda3 | 3967 | signal_is_trapped (termsig) == 0) |
28ef6c31 | 3968 | { |
b80f6443 | 3969 | /* Don't print `0' for a line number. */ |
3185942a | 3970 | fprintf (stderr, _("%s: line %d: "), get_name_for_error (), (line_number == 0) ? 1 : line_number); |
ccc6cda3 JA |
3971 | pretty_print_job (job, JLIST_NONINTERACTIVE, stderr); |
3972 | } | |
3973 | else if (IS_FOREGROUND (job)) | |
726f6388 | 3974 | { |
d166f048 | 3975 | #if !defined (DONT_REPORT_SIGPIPE) |
726f6388 | 3976 | if (termsig && WIFSIGNALED (s) && termsig != SIGINT) |
d166f048 JA |
3977 | #else |
3978 | if (termsig && WIFSIGNALED (s) && termsig != SIGINT && termsig != SIGPIPE) | |
3979 | #endif | |
726f6388 | 3980 | { |
b80f6443 | 3981 | fprintf (stderr, "%s", j_strsignal (termsig)); |
726f6388 JA |
3982 | |
3983 | if (WIFCORED (s)) | |
3185942a | 3984 | fprintf (stderr, _(" (core dumped)")); |
726f6388 JA |
3985 | |
3986 | fprintf (stderr, "\n"); | |
3987 | } | |
3988 | } | |
95732b49 | 3989 | else if (job_control) /* XXX job control test added */ |
726f6388 | 3990 | { |
ccc6cda3 | 3991 | if (dir == 0) |
726f6388 | 3992 | dir = current_working_directory (); |
ccc6cda3 | 3993 | pretty_print_job (job, JLIST_STANDARD, stderr); |
726f6388 JA |
3994 | if (dir && strcmp (dir, jobs[job]->wd) != 0) |
3995 | fprintf (stderr, | |
3185942a | 3996 | _("(wd now: %s)\n"), polite_directory_format (dir)); |
726f6388 JA |
3997 | } |
3998 | ||
3999 | jobs[job]->flags |= J_NOTIFIED; | |
4000 | break; | |
4001 | ||
4002 | case JSTOPPED: | |
4003 | fprintf (stderr, "\n"); | |
ccc6cda3 | 4004 | if (dir == 0) |
726f6388 | 4005 | dir = current_working_directory (); |
ccc6cda3 | 4006 | pretty_print_job (job, JLIST_STANDARD, stderr); |
726f6388 JA |
4007 | if (dir && (strcmp (dir, jobs[job]->wd) != 0)) |
4008 | fprintf (stderr, | |
3185942a | 4009 | _("(wd now: %s)\n"), polite_directory_format (dir)); |
726f6388 JA |
4010 | jobs[job]->flags |= J_NOTIFIED; |
4011 | break; | |
4012 | ||
4013 | case JRUNNING: | |
4014 | case JMIXED: | |
4015 | break; | |
4016 | ||
4017 | default: | |
4018 | programming_error ("notify_of_job_status"); | |
4019 | } | |
4020 | } | |
4021 | } | |
7117c2d2 JA |
4022 | if (old_ttou != 0) |
4023 | sigprocmask (SIG_SETMASK, &oset, (sigset_t *)NULL); | |
4024 | else | |
4025 | queue_sigchld--; | |
726f6388 JA |
4026 | } |
4027 | ||
726f6388 | 4028 | /* Initialize the job control mechanism, and set up the tty stuff. */ |
ccc6cda3 | 4029 | int |
d166f048 JA |
4030 | initialize_job_control (force) |
4031 | int force; | |
726f6388 | 4032 | { |
3185942a JA |
4033 | pid_t t; |
4034 | int t_errno; | |
4035 | ||
4036 | t_errno = -1; | |
726f6388 JA |
4037 | shell_pgrp = getpgid (0); |
4038 | ||
4039 | if (shell_pgrp == -1) | |
4040 | { | |
3185942a | 4041 | sys_error (_("initialize_job_control: getpgrp failed")); |
726f6388 JA |
4042 | exit (1); |
4043 | } | |
4044 | ||
ac50fbac CR |
4045 | /* We can only have job control if we are interactive unless we force it. */ |
4046 | if (interactive == 0 && force == 0) | |
726f6388 JA |
4047 | { |
4048 | job_control = 0; | |
4049 | original_pgrp = NO_PID; | |
d166f048 | 4050 | shell_tty = fileno (stderr); |
a0c0a00f | 4051 | terminal_pgrp = tcgetpgrp (shell_tty); /* for checking later */ |
726f6388 JA |
4052 | } |
4053 | else | |
4054 | { | |
3185942a JA |
4055 | shell_tty = -1; |
4056 | ||
4057 | /* If forced_interactive is set, we skip the normal check that stderr | |
4058 | is attached to a tty, so we need to check here. If it's not, we | |
4059 | need to see whether we have a controlling tty by opening /dev/tty, | |
4060 | since trying to use job control tty pgrp manipulations on a non-tty | |
4061 | is going to fail. */ | |
4062 | if (forced_interactive && isatty (fileno (stderr)) == 0) | |
4063 | shell_tty = open ("/dev/tty", O_RDWR|O_NONBLOCK); | |
4064 | ||
726f6388 JA |
4065 | /* Get our controlling terminal. If job_control is set, or |
4066 | interactive is set, then this is an interactive shell no | |
ccc6cda3 | 4067 | matter where fd 2 is directed. */ |
3185942a JA |
4068 | if (shell_tty == -1) |
4069 | shell_tty = dup (fileno (stderr)); /* fd 2 */ | |
726f6388 | 4070 | |
ac50fbac CR |
4071 | if (shell_tty != -1) |
4072 | shell_tty = move_to_high_fd (shell_tty, 1, -1); | |
726f6388 | 4073 | |
726f6388 | 4074 | /* Compensate for a bug in systems that compiled the BSD |
ccc6cda3 | 4075 | rlogind with DEBUG defined, like NeXT and Alliant. */ |
726f6388 JA |
4076 | if (shell_pgrp == 0) |
4077 | { | |
4078 | shell_pgrp = getpid (); | |
4079 | setpgid (0, shell_pgrp); | |
a0c0a00f CR |
4080 | if (shell_tty != -1) |
4081 | tcsetpgrp (shell_tty, shell_pgrp); | |
726f6388 | 4082 | } |
726f6388 JA |
4083 | |
4084 | while ((terminal_pgrp = tcgetpgrp (shell_tty)) != -1) | |
4085 | { | |
4086 | if (shell_pgrp != terminal_pgrp) | |
4087 | { | |
7117c2d2 | 4088 | SigHandler *ottin; |
ccc6cda3 | 4089 | |
a0c0a00f | 4090 | ottin = set_signal_handler (SIGTTIN, SIG_DFL); |
726f6388 | 4091 | kill (0, SIGTTIN); |
7117c2d2 | 4092 | set_signal_handler (SIGTTIN, ottin); |
726f6388 JA |
4093 | continue; |
4094 | } | |
4095 | break; | |
4096 | } | |
4097 | ||
3185942a JA |
4098 | if (terminal_pgrp == -1) |
4099 | t_errno = errno; | |
4100 | ||
ccc6cda3 | 4101 | /* Make sure that we are using the new line discipline. */ |
726f6388 JA |
4102 | if (set_new_line_discipline (shell_tty) < 0) |
4103 | { | |
3185942a | 4104 | sys_error (_("initialize_job_control: line discipline")); |
726f6388 JA |
4105 | job_control = 0; |
4106 | } | |
4107 | else | |
4108 | { | |
4109 | original_pgrp = shell_pgrp; | |
4110 | shell_pgrp = getpid (); | |
4111 | ||
4112 | if ((original_pgrp != shell_pgrp) && (setpgid (0, shell_pgrp) < 0)) | |
4113 | { | |
3185942a | 4114 | sys_error (_("initialize_job_control: setpgid")); |
726f6388 JA |
4115 | shell_pgrp = original_pgrp; |
4116 | } | |
4117 | ||
4118 | job_control = 1; | |
ccc6cda3 JA |
4119 | |
4120 | /* If (and only if) we just set our process group to our pid, | |
4121 | thereby becoming a process group leader, and the terminal | |
4122 | is not in the same process group as our (new) process group, | |
4123 | then set the terminal's process group to our (new) process | |
4124 | group. If that fails, set our process group back to what it | |
4125 | was originally (so we can still read from the terminal) and | |
4126 | turn off job control. */ | |
4127 | if (shell_pgrp != original_pgrp && shell_pgrp != terminal_pgrp) | |
4128 | { | |
28ef6c31 | 4129 | if (give_terminal_to (shell_pgrp, 0) < 0) |
ccc6cda3 | 4130 | { |
3185942a | 4131 | t_errno = errno; |
28ef6c31 JA |
4132 | setpgid (0, original_pgrp); |
4133 | shell_pgrp = original_pgrp; | |
ac50fbac CR |
4134 | errno = t_errno; |
4135 | sys_error (_("cannot set terminal process group (%d)"), shell_pgrp); | |
28ef6c31 | 4136 | job_control = 0; |
ccc6cda3 JA |
4137 | } |
4138 | } | |
3185942a JA |
4139 | |
4140 | if (job_control && ((t = tcgetpgrp (shell_tty)) == -1 || t != shell_pgrp)) | |
4141 | { | |
4142 | if (t_errno != -1) | |
4143 | errno = t_errno; | |
4144 | sys_error (_("cannot set terminal process group (%d)"), t); | |
4145 | job_control = 0; | |
4146 | } | |
726f6388 JA |
4147 | } |
4148 | if (job_control == 0) | |
b80f6443 | 4149 | internal_error (_("no job control in this shell")); |
726f6388 JA |
4150 | } |
4151 | ||
a0c0a00f CR |
4152 | running_in_background = terminal_pgrp != shell_pgrp; |
4153 | ||
726f6388 JA |
4154 | if (shell_tty != fileno (stderr)) |
4155 | SET_CLOSE_ON_EXEC (shell_tty); | |
4156 | ||
ccc6cda3 | 4157 | set_signal_handler (SIGCHLD, sigchld_handler); |
726f6388 JA |
4158 | |
4159 | change_flag ('m', job_control ? '-' : '+'); | |
4160 | ||
4161 | if (interactive) | |
4162 | get_tty_state (); | |
ccc6cda3 | 4163 | |
95732b49 JA |
4164 | if (js.c_childmax < 0) |
4165 | js.c_childmax = getmaxchild (); | |
4166 | if (js.c_childmax < 0) | |
4167 | js.c_childmax = DEFAULT_CHILD_MAX; | |
4168 | ||
a0c0a00f CR |
4169 | #if 0 |
4170 | if (js.c_childmax > MAX_CHILD_MAX) | |
4171 | js.c_childmax = MAX_CHILD_MAX; | |
4172 | #endif | |
4173 | ||
726f6388 JA |
4174 | return job_control; |
4175 | } | |
4176 | ||
28ef6c31 JA |
4177 | #ifdef DEBUG |
4178 | void | |
4179 | debug_print_pgrps () | |
4180 | { | |
f73dda09 JA |
4181 | itrace("original_pgrp = %ld shell_pgrp = %ld terminal_pgrp = %ld", |
4182 | (long)original_pgrp, (long)shell_pgrp, (long)terminal_pgrp); | |
4183 | itrace("tcgetpgrp(%d) -> %ld, getpgid(0) -> %ld", | |
4184 | shell_tty, (long)tcgetpgrp (shell_tty), (long)getpgid(0)); | |
28ef6c31 JA |
4185 | } |
4186 | #endif | |
4187 | ||
726f6388 JA |
4188 | /* Set the line discipline to the best this system has to offer. |
4189 | Return -1 if this is not possible. */ | |
4190 | static int | |
4191 | set_new_line_discipline (tty) | |
4192 | int tty; | |
4193 | { | |
4194 | #if defined (NEW_TTY_DRIVER) | |
4195 | int ldisc; | |
4196 | ||
4197 | if (ioctl (tty, TIOCGETD, &ldisc) < 0) | |
4198 | return (-1); | |
4199 | ||
4200 | if (ldisc != NTTYDISC) | |
4201 | { | |
4202 | ldisc = NTTYDISC; | |
4203 | ||
4204 | if (ioctl (tty, TIOCSETD, &ldisc) < 0) | |
4205 | return (-1); | |
4206 | } | |
4207 | return (0); | |
4208 | #endif /* NEW_TTY_DRIVER */ | |
4209 | ||
4210 | #if defined (TERMIO_TTY_DRIVER) | |
ccc6cda3 | 4211 | # if defined (TERMIO_LDISC) && (NTTYDISC) |
726f6388 JA |
4212 | if (ioctl (tty, TCGETA, &shell_tty_info) < 0) |
4213 | return (-1); | |
4214 | ||
4215 | if (shell_tty_info.c_line != NTTYDISC) | |
4216 | { | |
4217 | shell_tty_info.c_line = NTTYDISC; | |
4218 | if (ioctl (tty, TCSETAW, &shell_tty_info) < 0) | |
4219 | return (-1); | |
4220 | } | |
ccc6cda3 | 4221 | # endif /* TERMIO_LDISC && NTTYDISC */ |
726f6388 JA |
4222 | return (0); |
4223 | #endif /* TERMIO_TTY_DRIVER */ | |
4224 | ||
4225 | #if defined (TERMIOS_TTY_DRIVER) | |
ccc6cda3 | 4226 | # if defined (TERMIOS_LDISC) && defined (NTTYDISC) |
726f6388 JA |
4227 | if (tcgetattr (tty, &shell_tty_info) < 0) |
4228 | return (-1); | |
4229 | ||
4230 | if (shell_tty_info.c_line != NTTYDISC) | |
4231 | { | |
4232 | shell_tty_info.c_line = NTTYDISC; | |
4233 | if (tcsetattr (tty, TCSADRAIN, &shell_tty_info) < 0) | |
4234 | return (-1); | |
4235 | } | |
ccc6cda3 | 4236 | # endif /* TERMIOS_LDISC && NTTYDISC */ |
726f6388 JA |
4237 | return (0); |
4238 | #endif /* TERMIOS_TTY_DRIVER */ | |
4239 | ||
4240 | #if !defined (NEW_TTY_DRIVER) && !defined (TERMIO_TTY_DRIVER) && !defined (TERMIOS_TTY_DRIVER) | |
4241 | return (-1); | |
4242 | #endif | |
4243 | } | |
4244 | ||
726f6388 JA |
4245 | /* Setup this shell to handle C-C, etc. */ |
4246 | void | |
4247 | initialize_job_signals () | |
4248 | { | |
4249 | if (interactive) | |
4250 | { | |
4251 | set_signal_handler (SIGINT, sigint_sighandler); | |
4252 | set_signal_handler (SIGTSTP, SIG_IGN); | |
4253 | set_signal_handler (SIGTTOU, SIG_IGN); | |
4254 | set_signal_handler (SIGTTIN, SIG_IGN); | |
726f6388 JA |
4255 | } |
4256 | else if (job_control) | |
4257 | { | |
28ef6c31 | 4258 | old_tstp = set_signal_handler (SIGTSTP, sigstop_sighandler); |
28ef6c31 | 4259 | old_ttin = set_signal_handler (SIGTTIN, sigstop_sighandler); |
7117c2d2 | 4260 | old_ttou = set_signal_handler (SIGTTOU, sigstop_sighandler); |
726f6388 | 4261 | } |
a0c0a00f | 4262 | /* Leave disposition unmodified for non-interactive shells without job |
726f6388 JA |
4263 | control. */ |
4264 | } | |
4265 | ||
4266 | /* Here we handle CONT signals. */ | |
4267 | static sighandler | |
28ef6c31 | 4268 | sigcont_sighandler (sig) |
726f6388 JA |
4269 | int sig; |
4270 | { | |
4271 | initialize_job_signals (); | |
4272 | set_signal_handler (SIGCONT, old_cont); | |
4273 | kill (getpid (), SIGCONT); | |
4274 | ||
ccc6cda3 | 4275 | SIGRETURN (0); |
726f6388 JA |
4276 | } |
4277 | ||
4278 | /* Here we handle stop signals while we are running not as a login shell. */ | |
4279 | static sighandler | |
28ef6c31 | 4280 | sigstop_sighandler (sig) |
726f6388 JA |
4281 | int sig; |
4282 | { | |
4283 | set_signal_handler (SIGTSTP, old_tstp); | |
4284 | set_signal_handler (SIGTTOU, old_ttou); | |
4285 | set_signal_handler (SIGTTIN, old_ttin); | |
4286 | ||
28ef6c31 | 4287 | old_cont = set_signal_handler (SIGCONT, sigcont_sighandler); |
726f6388 | 4288 | |
28ef6c31 | 4289 | give_terminal_to (shell_pgrp, 0); |
726f6388 JA |
4290 | |
4291 | kill (getpid (), sig); | |
4292 | ||
ccc6cda3 | 4293 | SIGRETURN (0); |
726f6388 JA |
4294 | } |
4295 | ||
4296 | /* Give the terminal to PGRP. */ | |
ccc6cda3 | 4297 | int |
28ef6c31 | 4298 | give_terminal_to (pgrp, force) |
726f6388 | 4299 | pid_t pgrp; |
28ef6c31 | 4300 | int force; |
726f6388 JA |
4301 | { |
4302 | sigset_t set, oset; | |
3185942a | 4303 | int r, e; |
726f6388 | 4304 | |
ccc6cda3 | 4305 | r = 0; |
28ef6c31 | 4306 | if (job_control || force) |
726f6388 JA |
4307 | { |
4308 | sigemptyset (&set); | |
4309 | sigaddset (&set, SIGTTOU); | |
4310 | sigaddset (&set, SIGTTIN); | |
4311 | sigaddset (&set, SIGTSTP); | |
4312 | sigaddset (&set, SIGCHLD); | |
4313 | sigemptyset (&oset); | |
4314 | sigprocmask (SIG_BLOCK, &set, &oset); | |
4315 | ||
4316 | if (tcsetpgrp (shell_tty, pgrp) < 0) | |
4317 | { | |
4318 | /* Maybe we should print an error message? */ | |
ccc6cda3 | 4319 | #if 0 |
f73dda09 JA |
4320 | sys_error ("tcsetpgrp(%d) failed: pid %ld to pgrp %ld", |
4321 | shell_tty, (long)getpid(), (long)pgrp); | |
ccc6cda3 | 4322 | #endif |
726f6388 | 4323 | r = -1; |
3185942a | 4324 | e = errno; |
726f6388 JA |
4325 | } |
4326 | else | |
4327 | terminal_pgrp = pgrp; | |
726f6388 JA |
4328 | sigprocmask (SIG_SETMASK, &oset, (sigset_t *)NULL); |
4329 | } | |
4330 | ||
3185942a JA |
4331 | if (r == -1) |
4332 | errno = e; | |
4333 | ||
726f6388 JA |
4334 | return r; |
4335 | } | |
4336 | ||
3185942a JA |
4337 | /* Give terminal to NPGRP iff it's currently owned by OPGRP. FLAGS are the |
4338 | flags to pass to give_terminal_to(). */ | |
4339 | static int | |
4340 | maybe_give_terminal_to (opgrp, npgrp, flags) | |
4341 | pid_t opgrp, npgrp; | |
4342 | int flags; | |
4343 | { | |
4344 | int tpgrp; | |
4345 | ||
4346 | tpgrp = tcgetpgrp (shell_tty); | |
4347 | if (tpgrp < 0 && errno == ENOTTY) | |
4348 | return -1; | |
4349 | if (tpgrp == npgrp) | |
4350 | { | |
4351 | terminal_pgrp = npgrp; | |
4352 | return 0; | |
4353 | } | |
4354 | else if (tpgrp != opgrp) | |
4355 | { | |
4356 | #if defined (DEBUG) | |
a0c0a00f | 4357 | internal_warning ("%d: maybe_give_terminal_to: terminal pgrp == %d shell pgrp = %d new pgrp = %d in_background = %d", (int)getpid(), tpgrp, opgrp, npgrp, running_in_background); |
3185942a JA |
4358 | #endif |
4359 | return -1; | |
4360 | } | |
4361 | else | |
4362 | return (give_terminal_to (npgrp, flags)); | |
4363 | } | |
4364 | ||
726f6388 JA |
4365 | /* Clear out any jobs in the job array. This is intended to be used by |
4366 | children of the shell, who should not have any job structures as baggage | |
4367 | when they start executing (forking subshells for parenthesized execution | |
cce855bc JA |
4368 | and functions with pipes are the two that spring to mind). If RUNNING_ONLY |
4369 | is nonzero, only running jobs are removed from the table. */ | |
d166f048 | 4370 | void |
cce855bc JA |
4371 | delete_all_jobs (running_only) |
4372 | int running_only; | |
726f6388 JA |
4373 | { |
4374 | register int i; | |
4375 | sigset_t set, oset; | |
4376 | ||
ccc6cda3 JA |
4377 | BLOCK_CHILD (set, oset); |
4378 | ||
95732b49 JA |
4379 | /* XXX - need to set j_lastj, j_firstj appropriately if running_only != 0. */ |
4380 | if (js.j_jobslots) | |
726f6388 | 4381 | { |
95732b49 | 4382 | js.j_current = js.j_previous = NO_JOB; |
726f6388 | 4383 | |
95732b49 JA |
4384 | /* XXX could use js.j_firstj here */ |
4385 | for (i = 0; i < js.j_jobslots; i++) | |
4386 | { | |
4387 | #if defined (DEBUG) | |
4388 | if (i < js.j_firstj && jobs[i]) | |
4389 | itrace("delete_all_jobs: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
0628567a JA |
4390 | if (i > js.j_lastj && jobs[i]) |
4391 | itrace("delete_all_jobs: job %d non-null after js.j_lastj (%d)", i, js.j_lastj); | |
95732b49 JA |
4392 | #endif |
4393 | if (jobs[i] && (running_only == 0 || (running_only && RUNNING(i)))) | |
a0c0a00f CR |
4394 | /* We don't want to add any of these pids to bgpids. If running_only |
4395 | is non-zero, we don't want to add running jobs to the list. | |
4396 | If we are interested in all jobs, not just running jobs, and | |
4397 | we are going to clear the bgpids list below (bgp_clear()), we | |
4398 | don't need to bother. */ | |
4399 | delete_job (i, DEL_WARNSTOPPED|DEL_NOBGPID); | |
95732b49 | 4400 | } |
cce855bc JA |
4401 | if (running_only == 0) |
4402 | { | |
4403 | free ((char *)jobs); | |
95732b49 JA |
4404 | js.j_jobslots = 0; |
4405 | js.j_firstj = js.j_lastj = js.j_njobs = 0; | |
cce855bc | 4406 | } |
726f6388 | 4407 | } |
ccc6cda3 | 4408 | |
95732b49 JA |
4409 | if (running_only == 0) |
4410 | bgp_clear (); | |
4411 | ||
ccc6cda3 | 4412 | UNBLOCK_CHILD (oset); |
726f6388 JA |
4413 | } |
4414 | ||
d166f048 | 4415 | /* Mark all jobs in the job array so that they don't get a SIGHUP when the |
cce855bc | 4416 | shell gets one. If RUNNING_ONLY is nonzero, mark only running jobs. */ |
d166f048 | 4417 | void |
cce855bc JA |
4418 | nohup_all_jobs (running_only) |
4419 | int running_only; | |
d166f048 JA |
4420 | { |
4421 | register int i; | |
4422 | sigset_t set, oset; | |
4423 | ||
4424 | BLOCK_CHILD (set, oset); | |
4425 | ||
95732b49 | 4426 | if (js.j_jobslots) |
d166f048 | 4427 | { |
95732b49 JA |
4428 | /* XXX could use js.j_firstj here */ |
4429 | for (i = 0; i < js.j_jobslots; i++) | |
cce855bc | 4430 | if (jobs[i] && (running_only == 0 || (running_only && RUNNING(i)))) |
d166f048 JA |
4431 | nohup_job (i); |
4432 | } | |
4433 | ||
4434 | UNBLOCK_CHILD (oset); | |
4435 | } | |
4436 | ||
bb70624e JA |
4437 | int |
4438 | count_all_jobs () | |
4439 | { | |
4440 | int i, n; | |
4441 | sigset_t set, oset; | |
4442 | ||
95732b49 | 4443 | /* This really counts all non-dead jobs. */ |
bb70624e | 4444 | BLOCK_CHILD (set, oset); |
95732b49 JA |
4445 | /* XXX could use js.j_firstj here */ |
4446 | for (i = n = 0; i < js.j_jobslots; i++) | |
4447 | { | |
4448 | #if defined (DEBUG) | |
4449 | if (i < js.j_firstj && jobs[i]) | |
4450 | itrace("count_all_jobs: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
0628567a JA |
4451 | if (i > js.j_lastj && jobs[i]) |
4452 | itrace("count_all_jobs: job %d non-null after js.j_lastj (%d)", i, js.j_lastj); | |
95732b49 JA |
4453 | #endif |
4454 | if (jobs[i] && DEADJOB(i) == 0) | |
4455 | n++; | |
4456 | } | |
bb70624e JA |
4457 | UNBLOCK_CHILD (oset); |
4458 | return n; | |
4459 | } | |
4460 | ||
4461 | static void | |
4462 | mark_all_jobs_as_dead () | |
4463 | { | |
4464 | register int i; | |
4465 | sigset_t set, oset; | |
4466 | ||
95732b49 | 4467 | if (js.j_jobslots == 0) |
7117c2d2 | 4468 | return; |
bb70624e | 4469 | |
7117c2d2 | 4470 | BLOCK_CHILD (set, oset); |
bb70624e | 4471 | |
95732b49 JA |
4472 | /* XXX could use js.j_firstj here */ |
4473 | for (i = 0; i < js.j_jobslots; i++) | |
7117c2d2 | 4474 | if (jobs[i]) |
95732b49 JA |
4475 | { |
4476 | jobs[i]->state = JDEAD; | |
4477 | js.j_ndead++; | |
4478 | } | |
7117c2d2 JA |
4479 | |
4480 | UNBLOCK_CHILD (oset); | |
bb70624e JA |
4481 | } |
4482 | ||
726f6388 | 4483 | /* Mark all dead jobs as notified, so delete_job () cleans them out |
b72432fd JA |
4484 | of the job table properly. POSIX.2 says we need to save the |
4485 | status of the last CHILD_MAX jobs, so we count the number of dead | |
4486 | jobs and mark only enough as notified to save CHILD_MAX statuses. */ | |
726f6388 | 4487 | static void |
b72432fd JA |
4488 | mark_dead_jobs_as_notified (force) |
4489 | int force; | |
726f6388 | 4490 | { |
95732b49 | 4491 | register int i, ndead, ndeadproc; |
726f6388 JA |
4492 | sigset_t set, oset; |
4493 | ||
95732b49 | 4494 | if (js.j_jobslots == 0) |
7117c2d2 | 4495 | return; |
b72432fd | 4496 | |
7117c2d2 | 4497 | BLOCK_CHILD (set, oset); |
b72432fd | 4498 | |
7117c2d2 JA |
4499 | /* If FORCE is non-zero, we don't have to keep CHILD_MAX statuses |
4500 | around; just run through the array. */ | |
4501 | if (force) | |
4502 | { | |
95732b49 JA |
4503 | /* XXX could use js.j_firstj here */ |
4504 | for (i = 0; i < js.j_jobslots; i++) | |
28ef6c31 | 4505 | { |
7117c2d2 JA |
4506 | if (jobs[i] && DEADJOB (i) && (interactive_shell || (find_last_pid (i, 0) != last_asynchronous_pid))) |
4507 | jobs[i]->flags |= J_NOTIFIED; | |
28ef6c31 | 4508 | } |
7117c2d2 JA |
4509 | UNBLOCK_CHILD (oset); |
4510 | return; | |
4511 | } | |
4512 | ||
95732b49 JA |
4513 | /* Mark enough dead jobs as notified to keep CHILD_MAX processes left in the |
4514 | array with the corresponding not marked as notified. This is a better | |
4515 | way to avoid pid aliasing and reuse problems than keeping the POSIX- | |
4516 | mandated CHILD_MAX jobs around. delete_job() takes care of keeping the | |
4517 | bgpids list regulated. */ | |
7117c2d2 JA |
4518 | |
4519 | /* Count the number of dead jobs */ | |
95732b49 JA |
4520 | /* XXX could use js.j_firstj here */ |
4521 | for (i = ndead = ndeadproc = 0; i < js.j_jobslots; i++) | |
7117c2d2 | 4522 | { |
95732b49 JA |
4523 | #if defined (DEBUG) |
4524 | if (i < js.j_firstj && jobs[i]) | |
4525 | itrace("mark_dead_jobs_as_notified: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
0628567a JA |
4526 | if (i > js.j_lastj && jobs[i]) |
4527 | itrace("mark_dead_jobs_as_notified: job %d non-null after js.j_lastj (%d)", i, js.j_lastj); | |
95732b49 | 4528 | #endif |
7117c2d2 | 4529 | if (jobs[i] && DEADJOB (i)) |
95732b49 JA |
4530 | { |
4531 | ndead++; | |
4532 | ndeadproc += processes_in_job (i); | |
4533 | } | |
7117c2d2 JA |
4534 | } |
4535 | ||
95732b49 | 4536 | #ifdef DEBUG |
ac50fbac | 4537 | # if 0 |
95732b49 JA |
4538 | if (ndeadproc != js.c_reaped) |
4539 | itrace("mark_dead_jobs_as_notified: ndeadproc (%d) != js.c_reaped (%d)", ndeadproc, js.c_reaped); | |
ac50fbac | 4540 | # endif |
95732b49 JA |
4541 | if (ndead != js.j_ndead) |
4542 | itrace("mark_dead_jobs_as_notified: ndead (%d) != js.j_ndead (%d)", ndead, js.j_ndead); | |
4543 | #endif | |
4544 | ||
4545 | if (js.c_childmax < 0) | |
4546 | js.c_childmax = getmaxchild (); | |
4547 | if (js.c_childmax < 0) | |
4548 | js.c_childmax = DEFAULT_CHILD_MAX; | |
726f6388 | 4549 | |
a0c0a00f CR |
4550 | #if 0 |
4551 | if (js.c_childmax > MAX_CHILD_MAX) | |
4552 | js.c_childmax = MAX_CHILD_MAX; | |
4553 | #endif | |
4554 | ||
95732b49 JA |
4555 | /* Don't do anything if the number of dead processes is less than CHILD_MAX |
4556 | and we're not forcing a cleanup. */ | |
4557 | if (ndeadproc <= js.c_childmax) | |
7117c2d2 | 4558 | { |
726f6388 | 4559 | UNBLOCK_CHILD (oset); |
7117c2d2 | 4560 | return; |
726f6388 | 4561 | } |
7117c2d2 | 4562 | |
95732b49 JA |
4563 | #if 0 |
4564 | itrace("mark_dead_jobs_as_notified: child_max = %d ndead = %d ndeadproc = %d", js.c_childmax, ndead, ndeadproc); | |
4565 | #endif | |
4566 | ||
7117c2d2 JA |
4567 | /* Mark enough dead jobs as notified that we keep CHILD_MAX jobs in |
4568 | the list. This isn't exactly right yet; changes need to be made | |
4569 | to stop_pipeline so we don't mark the newer jobs after we've | |
95732b49 JA |
4570 | created CHILD_MAX slots in the jobs array. This needs to be |
4571 | integrated with a way to keep the jobs array from growing without | |
4572 | bound. Maybe we wrap back around to 0 after we reach some max | |
4573 | limit, and there are sufficient job slots free (keep track of total | |
4574 | size of jobs array (js.j_jobslots) and running count of number of jobs | |
4575 | in jobs array. Then keep a job index corresponding to the `oldest job' | |
4576 | and start this loop there, wrapping around as necessary. In effect, | |
4577 | we turn the list into a circular buffer. */ | |
4578 | /* XXX could use js.j_firstj here */ | |
4579 | for (i = 0; i < js.j_jobslots; i++) | |
7117c2d2 JA |
4580 | { |
4581 | if (jobs[i] && DEADJOB (i) && (interactive_shell || (find_last_pid (i, 0) != last_asynchronous_pid))) | |
4582 | { | |
95732b49 JA |
4583 | #if defined (DEBUG) |
4584 | if (i < js.j_firstj && jobs[i]) | |
4585 | itrace("mark_dead_jobs_as_notified: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
0628567a JA |
4586 | if (i > js.j_lastj && jobs[i]) |
4587 | itrace("mark_dead_jobs_as_notified: job %d non-null after js.j_lastj (%d)", i, js.j_lastj); | |
95732b49 JA |
4588 | #endif |
4589 | /* If marking this job as notified would drop us down below | |
4590 | child_max, don't mark it so we can keep at least child_max | |
4591 | statuses. XXX -- need to check what Posix actually says | |
4592 | about keeping statuses. */ | |
4593 | if ((ndeadproc -= processes_in_job (i)) <= js.c_childmax) | |
7117c2d2 | 4594 | break; |
95732b49 | 4595 | jobs[i]->flags |= J_NOTIFIED; |
7117c2d2 JA |
4596 | } |
4597 | } | |
4598 | ||
4599 | UNBLOCK_CHILD (oset); | |
726f6388 JA |
4600 | } |
4601 | ||
ccc6cda3 | 4602 | /* Here to allow other parts of the shell (like the trap stuff) to |
495aee44 | 4603 | freeze and unfreeze the jobs list. */ |
a0c0a00f | 4604 | int |
495aee44 CR |
4605 | freeze_jobs_list () |
4606 | { | |
a0c0a00f CR |
4607 | int o; |
4608 | ||
4609 | o = jobs_list_frozen; | |
495aee44 | 4610 | jobs_list_frozen = 1; |
a0c0a00f | 4611 | return o; |
495aee44 CR |
4612 | } |
4613 | ||
ccc6cda3 JA |
4614 | void |
4615 | unfreeze_jobs_list () | |
4616 | { | |
4617 | jobs_list_frozen = 0; | |
4618 | } | |
4619 | ||
726f6388 JA |
4620 | /* Allow or disallow job control to take place. Returns the old value |
4621 | of job_control. */ | |
4622 | int | |
4623 | set_job_control (arg) | |
4624 | int arg; | |
4625 | { | |
4626 | int old; | |
4627 | ||
4628 | old = job_control; | |
4629 | job_control = arg; | |
b80f6443 | 4630 | |
a0c0a00f CR |
4631 | if (terminal_pgrp == NO_PID) |
4632 | terminal_pgrp = tcgetpgrp (shell_tty); | |
4633 | ||
4634 | running_in_background = (terminal_pgrp != shell_pgrp); | |
4635 | ||
4636 | #if 0 | |
4637 | if (interactive_shell == 0 && running_in_background == 0 && job_control != old) | |
4638 | { | |
4639 | if (job_control) | |
4640 | initialize_job_signals (); | |
4641 | else | |
4642 | default_tty_job_signals (); | |
4643 | } | |
4644 | #endif | |
4645 | ||
b80f6443 JA |
4646 | /* If we're turning on job control, reset pipeline_pgrp so make_child will |
4647 | put new child processes into the right pgrp */ | |
4648 | if (job_control != old && job_control) | |
4649 | pipeline_pgrp = 0; | |
4650 | ||
726f6388 JA |
4651 | return (old); |
4652 | } | |
4653 | ||
4654 | /* Turn off all traces of job control. This is run by children of the shell | |
4655 | which are going to do shellsy things, like wait (), etc. */ | |
4656 | void | |
4657 | without_job_control () | |
4658 | { | |
4659 | stop_making_children (); | |
4660 | start_pipeline (); | |
95732b49 | 4661 | #if defined (PGRP_PIPE) |
3185942a | 4662 | sh_closepipe (pgrp_pipe); |
95732b49 | 4663 | #endif |
cce855bc | 4664 | delete_all_jobs (0); |
726f6388 JA |
4665 | set_job_control (0); |
4666 | } | |
4667 | ||
4668 | /* If this shell is interactive, terminate all stopped jobs and | |
4669 | restore the original terminal process group. This is done | |
4670 | before the `exec' builtin calls shell_execve. */ | |
4671 | void | |
4672 | end_job_control () | |
4673 | { | |
22205f43 | 4674 | if (interactive_shell || job_control) /* XXX - should it be just job_control? */ |
726f6388 JA |
4675 | { |
4676 | terminate_stopped_jobs (); | |
4677 | ||
4678 | if (original_pgrp >= 0) | |
28ef6c31 | 4679 | give_terminal_to (original_pgrp, 1); |
726f6388 JA |
4680 | } |
4681 | ||
4682 | if (original_pgrp >= 0) | |
4683 | setpgid (0, original_pgrp); | |
4684 | } | |
4685 | ||
4686 | /* Restart job control by closing shell tty and reinitializing. This is | |
4687 | called after an exec fails in an interactive shell and we do not exit. */ | |
4688 | void | |
4689 | restart_job_control () | |
4690 | { | |
4691 | if (shell_tty != -1) | |
4692 | close (shell_tty); | |
d166f048 | 4693 | initialize_job_control (0); |
726f6388 JA |
4694 | } |
4695 | ||
ac50fbac CR |
4696 | void |
4697 | set_maxchild (nchild) | |
4698 | int nchild; | |
4699 | { | |
4700 | static int lmaxchild = -1; | |
4701 | ||
4702 | if (lmaxchild < 0) | |
4703 | lmaxchild = getmaxchild (); | |
4704 | if (lmaxchild < 0) | |
4705 | lmaxchild = DEFAULT_CHILD_MAX; | |
4706 | ||
4707 | /* Clamp value we set. Minimum is what Posix requires, maximum is defined | |
4708 | above as MAX_CHILD_MAX. */ | |
4709 | if (nchild < lmaxchild) | |
4710 | nchild = lmaxchild; | |
4711 | else if (nchild > MAX_CHILD_MAX) | |
4712 | nchild = MAX_CHILD_MAX; | |
4713 | ||
4714 | js.c_childmax = nchild; | |
4715 | } | |
4716 | ||
726f6388 JA |
4717 | /* Set the handler to run when the shell receives a SIGCHLD signal. */ |
4718 | void | |
4719 | set_sigchld_handler () | |
4720 | { | |
ccc6cda3 | 4721 | set_signal_handler (SIGCHLD, sigchld_handler); |
726f6388 JA |
4722 | } |
4723 | ||
4724 | #if defined (PGRP_PIPE) | |
4725 | /* Read from the read end of a pipe. This is how the process group leader | |
4726 | blocks until all of the processes in a pipeline have been made. */ | |
4727 | static void | |
4728 | pipe_read (pp) | |
4729 | int *pp; | |
4730 | { | |
4731 | char ch; | |
4732 | ||
4733 | if (pp[1] >= 0) | |
4734 | { | |
4735 | close (pp[1]); | |
4736 | pp[1] = -1; | |
4737 | } | |
4738 | ||
4739 | if (pp[0] >= 0) | |
4740 | { | |
4741 | while (read (pp[0], &ch, 1) == -1 && errno == EINTR) | |
bb70624e | 4742 | ; |
726f6388 JA |
4743 | } |
4744 | } | |
4745 | ||
726f6388 | 4746 | /* Functional interface closes our local-to-job-control pipes. */ |
ccc6cda3 | 4747 | void |
726f6388 JA |
4748 | close_pgrp_pipe () |
4749 | { | |
3185942a | 4750 | sh_closepipe (pgrp_pipe); |
726f6388 JA |
4751 | } |
4752 | ||
89a92869 CR |
4753 | void |
4754 | save_pgrp_pipe (p, clear) | |
4755 | int *p; | |
4756 | int clear; | |
4757 | { | |
4758 | p[0] = pgrp_pipe[0]; | |
4759 | p[1] = pgrp_pipe[1]; | |
4760 | if (clear) | |
4761 | pgrp_pipe[0] = pgrp_pipe[1] = -1; | |
4762 | } | |
4763 | ||
4764 | void | |
4765 | restore_pgrp_pipe (p) | |
4766 | int *p; | |
4767 | { | |
4768 | pgrp_pipe[0] = p[0]; | |
4769 | pgrp_pipe[1] = p[1]; | |
4770 | } | |
4771 | ||
726f6388 | 4772 | #endif /* PGRP_PIPE */ |