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