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