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Commit | Line | Data |
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726f6388 JA |
1 | /* The thing that makes children, remembers them, and contains wait loops. */ |
2 | ||
ccc6cda3 JA |
3 | /* This file works with both POSIX and BSD systems. It implements job |
4 | control. */ | |
726f6388 | 5 | |
95732b49 | 6 | /* Copyright (C) 1989-2005 Free Software Foundation, Inc. |
726f6388 JA |
7 | |
8 | This file is part of GNU Bash, the Bourne Again SHell. | |
9 | ||
10 | Bash is free software; you can redistribute it and/or modify it under | |
11 | the terms of the GNU General Public License as published by the Free | |
bb70624e | 12 | Software Foundation; either version 2, or (at your option) any later |
726f6388 JA |
13 | version. |
14 | ||
15 | Bash is distributed in the hope that it will be useful, but WITHOUT ANY | |
16 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
17 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
18 | for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License along | |
21 | with Bash; see the file COPYING. If not, write to the Free Software | |
bb70624e | 22 | Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
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" | |
ccc6cda3 | 70 | #include "flags.h" |
726f6388 JA |
71 | |
72 | #include "builtins/builtext.h" | |
73 | #include "builtins/common.h" | |
74 | ||
726f6388 JA |
75 | #if !defined (errno) |
76 | extern int errno; | |
77 | #endif /* !errno */ | |
78 | ||
7117c2d2 JA |
79 | #define DEFAULT_CHILD_MAX 32 |
80 | #define MAX_JOBS_IN_ARRAY 4096 /* testing */ | |
b72432fd | 81 | |
ccc6cda3 JA |
82 | /* Take care of system dependencies that must be handled when waiting for |
83 | children. The arguments to the WAITPID macro match those to the Posix.1 | |
84 | waitpid() function. */ | |
85 | ||
86 | #if defined (ultrix) && defined (mips) && defined (_POSIX_VERSION) | |
87 | # define WAITPID(pid, statusp, options) \ | |
88 | wait3 ((union wait *)statusp, options, (struct rusage *)0) | |
89 | #else | |
90 | # if defined (_POSIX_VERSION) || defined (HAVE_WAITPID) | |
91 | # define WAITPID(pid, statusp, options) \ | |
92 | waitpid ((pid_t)pid, statusp, options) | |
93 | # else | |
94 | # if defined (HAVE_WAIT3) | |
95 | # define WAITPID(pid, statusp, options) \ | |
96 | wait3 (statusp, options, (struct rusage *)0) | |
97 | # else | |
98 | # define WAITPID(pid, statusp, options) \ | |
99 | wait3 (statusp, options, (int *)0) | |
100 | # endif /* HAVE_WAIT3 */ | |
101 | # endif /* !_POSIX_VERSION && !HAVE_WAITPID*/ | |
102 | #endif /* !(Ultrix && mips && _POSIX_VERSION) */ | |
103 | ||
104 | /* getpgrp () varies between systems. Even systems that claim to be | |
105 | Posix.1 compatible lie sometimes (Ultrix, SunOS4, apollo). */ | |
106 | #if defined (GETPGRP_VOID) | |
107 | # define getpgid(p) getpgrp () | |
108 | #else | |
109 | # define getpgid(p) getpgrp (p) | |
110 | #endif /* !GETPGRP_VOID */ | |
111 | ||
112 | /* If the system needs it, REINSTALL_SIGCHLD_HANDLER will reinstall the | |
113 | handler for SIGCHLD. */ | |
114 | #if defined (MUST_REINSTALL_SIGHANDLERS) | |
115 | # define REINSTALL_SIGCHLD_HANDLER signal (SIGCHLD, sigchld_handler) | |
116 | #else | |
117 | # define REINSTALL_SIGCHLD_HANDLER | |
118 | #endif /* !MUST_REINSTALL_SIGHANDLERS */ | |
119 | ||
f73dda09 | 120 | /* Some systems let waitpid(2) tell callers about stopped children. */ |
95732b49 JA |
121 | #if !defined (WCONTINUED) || defined (WCONTINUED_BROKEN) |
122 | # undef WCONTINUED | |
f73dda09 | 123 | # define WCONTINUED 0 |
b80f6443 JA |
124 | #endif |
125 | #if !defined (WIFCONTINUED) | |
f73dda09 JA |
126 | # define WIFCONTINUED(s) (0) |
127 | #endif | |
128 | ||
ccc6cda3 JA |
129 | /* The number of additional slots to allocate when we run out. */ |
130 | #define JOB_SLOTS 8 | |
131 | ||
f73dda09 JA |
132 | typedef int sh_job_map_func_t __P((JOB *, int, int, int)); |
133 | ||
726f6388 | 134 | /* Variables used here but defined in other files. */ |
7117c2d2 | 135 | extern int subshell_environment, line_number; |
f73dda09 | 136 | extern int posixly_correct, shell_level; |
b80f6443 JA |
137 | extern int interrupt_immediately; |
138 | extern int last_command_exit_value, last_command_exit_signal; | |
726f6388 | 139 | extern int loop_level, breaking; |
28ef6c31 | 140 | extern int sourcelevel; |
f73dda09 | 141 | extern sh_builtin_func_t *this_shell_builtin; |
726f6388 JA |
142 | extern char *shell_name, *this_command_name; |
143 | extern sigset_t top_level_mask; | |
bb70624e | 144 | extern procenv_t wait_intr_buf; |
7117c2d2 | 145 | extern int wait_signal_received; |
bb70624e | 146 | extern WORD_LIST *subst_assign_varlist; |
726f6388 | 147 | |
95732b49 JA |
148 | static struct jobstats zerojs = { -1L, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NO_JOB, NO_JOB, 0, 0 }; |
149 | struct jobstats js = { -1L, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NO_JOB, NO_JOB, 0, 0 }; | |
150 | ||
151 | struct bgpids bgpids = { 0, 0, 0 }; | |
152 | ||
726f6388 JA |
153 | /* The array of known jobs. */ |
154 | JOB **jobs = (JOB **)NULL; | |
155 | ||
95732b49 | 156 | #if 0 |
726f6388 JA |
157 | /* The number of slots currently allocated to JOBS. */ |
158 | int job_slots = 0; | |
95732b49 | 159 | #endif |
726f6388 | 160 | |
726f6388 JA |
161 | /* The controlling tty for this shell. */ |
162 | int shell_tty = -1; | |
163 | ||
164 | /* The shell's process group. */ | |
165 | pid_t shell_pgrp = NO_PID; | |
166 | ||
167 | /* The terminal's process group. */ | |
168 | pid_t terminal_pgrp = NO_PID; | |
169 | ||
170 | /* The process group of the shell's parent. */ | |
171 | pid_t original_pgrp = NO_PID; | |
172 | ||
173 | /* The process group of the pipeline currently being made. */ | |
174 | pid_t pipeline_pgrp = (pid_t)0; | |
175 | ||
176 | #if defined (PGRP_PIPE) | |
177 | /* Pipes which each shell uses to communicate with the process group leader | |
178 | until all of the processes in a pipeline have been started. Then the | |
179 | process leader is allowed to continue. */ | |
180 | int pgrp_pipe[2] = { -1, -1 }; | |
181 | #endif | |
ccc6cda3 | 182 | |
95732b49 | 183 | #if 0 |
726f6388 JA |
184 | /* The job which is current; i.e. the one that `%+' stands for. */ |
185 | int current_job = NO_JOB; | |
186 | ||
187 | /* The previous job; i.e. the one that `%-' stands for. */ | |
188 | int previous_job = NO_JOB; | |
95732b49 | 189 | #endif |
726f6388 JA |
190 | |
191 | /* Last child made by the shell. */ | |
192 | pid_t last_made_pid = NO_PID; | |
193 | ||
194 | /* Pid of the last asynchronous child. */ | |
195 | pid_t last_asynchronous_pid = NO_PID; | |
196 | ||
197 | /* The pipeline currently being built. */ | |
198 | PROCESS *the_pipeline = (PROCESS *)NULL; | |
199 | ||
200 | /* If this is non-zero, do job control. */ | |
201 | int job_control = 1; | |
202 | ||
203 | /* Call this when you start making children. */ | |
204 | int already_making_children = 0; | |
205 | ||
ccc6cda3 JA |
206 | /* If this is non-zero, $LINES and $COLUMNS are reset after every process |
207 | exits from get_tty_state(). */ | |
208 | int check_window_size; | |
209 | ||
726f6388 | 210 | /* Functions local to this file. */ |
f73dda09 | 211 | |
f73dda09 JA |
212 | static void run_sigchld_trap __P((int)); |
213 | ||
214 | static sighandler wait_sigint_handler __P((int)); | |
215 | static sighandler sigchld_handler __P((int)); | |
f73dda09 JA |
216 | static sighandler sigcont_sighandler __P((int)); |
217 | static sighandler sigstop_sighandler __P((int)); | |
218 | ||
219 | static int waitchld __P((pid_t, int)); | |
220 | ||
7117c2d2 | 221 | static PROCESS *find_pipeline __P((pid_t, int, int *)); |
95732b49 | 222 | static PROCESS *find_process __P((pid_t, int, int *)); |
f73dda09 JA |
223 | |
224 | static char *current_working_directory __P((void)); | |
225 | static char *job_working_directory __P((void)); | |
b80f6443 | 226 | static char *j_strsignal __P((int)); |
f73dda09 JA |
227 | static char *printable_job_status __P((int, PROCESS *, int)); |
228 | ||
95732b49 | 229 | static PROCESS *find_last_proc __P((int, int)); |
7117c2d2 | 230 | static pid_t find_last_pid __P((int, int)); |
f73dda09 JA |
231 | |
232 | static int set_new_line_discipline __P((int)); | |
233 | static int map_over_jobs __P((sh_job_map_func_t *, int, int)); | |
234 | static int job_last_stopped __P((int)); | |
235 | static int job_last_running __P((int)); | |
236 | static int most_recent_job_in_state __P((int, JOB_STATE)); | |
95732b49 | 237 | static int find_job __P((pid_t, int, PROCESS **)); |
f73dda09 JA |
238 | static int print_job __P((JOB *, int, int, int)); |
239 | static int process_exit_status __P((WAIT)); | |
b80f6443 | 240 | static int process_exit_signal __P((WAIT)); |
f73dda09 | 241 | static int job_exit_status __P((int)); |
b80f6443 | 242 | static int job_exit_signal __P((int)); |
f73dda09 JA |
243 | static int set_job_status_and_cleanup __P((int)); |
244 | ||
245 | static WAIT raw_job_exit_status __P((int)); | |
246 | ||
247 | static void notify_of_job_status __P((void)); | |
95732b49 | 248 | static void reset_job_indices __P((void)); |
f73dda09 | 249 | static void cleanup_dead_jobs __P((void)); |
95732b49 JA |
250 | static int processes_in_job __P((int)); |
251 | static void realloc_jobs_list __P((void)); | |
7117c2d2 | 252 | static int compact_jobs_list __P((int)); |
95732b49 | 253 | static int discard_pipeline __P((PROCESS *)); |
f73dda09 JA |
254 | static void add_process __P((char *, pid_t)); |
255 | static void print_pipeline __P((PROCESS *, int, int, FILE *)); | |
256 | static void pretty_print_job __P((int, int, FILE *)); | |
257 | static void set_current_job __P((int)); | |
258 | static void reset_current __P((void)); | |
259 | static void set_job_running __P((int)); | |
260 | static void setjstatus __P((int)); | |
261 | static void mark_all_jobs_as_dead __P((void)); | |
262 | static void mark_dead_jobs_as_notified __P((int)); | |
263 | static void restore_sigint_handler __P((void)); | |
726f6388 | 264 | #if defined (PGRP_PIPE) |
f73dda09 JA |
265 | static void pipe_read __P((int *)); |
266 | static void pipe_close __P((int *)); | |
726f6388 JA |
267 | #endif |
268 | ||
95732b49 JA |
269 | static struct pidstat *bgp_alloc __P((pid_t, int)); |
270 | static struct pidstat *bgp_add __P((pid_t, int)); | |
271 | static int bgp_delete __P((pid_t)); | |
272 | static void bgp_clear __P((void)); | |
273 | static int bgp_search __P((pid_t)); | |
274 | static void bgp_prune __P((void)); | |
275 | ||
7117c2d2 JA |
276 | #if defined (ARRAY_VARS) |
277 | static int *pstatuses; /* list of pipeline statuses */ | |
278 | static int statsize; | |
279 | #endif | |
280 | ||
281 | /* Used to synchronize between wait_for and other functions and the SIGCHLD | |
282 | signal handler. */ | |
ccc6cda3 | 283 | static int sigchld; |
7117c2d2 JA |
284 | static int queue_sigchld; |
285 | ||
286 | #define QUEUE_SIGCHLD(os) (os) = sigchld, queue_sigchld++ | |
287 | ||
288 | #define UNQUEUE_SIGCHLD(os) \ | |
289 | do { \ | |
290 | queue_sigchld--; \ | |
291 | if (queue_sigchld == 0 && os != sigchld) \ | |
292 | waitchld (-1, 0); \ | |
293 | } while (0) | |
294 | ||
295 | static SigHandler *old_tstp, *old_ttou, *old_ttin; | |
296 | static SigHandler *old_cont = (SigHandler *)SIG_DFL; | |
297 | ||
ccc6cda3 JA |
298 | /* A place to temporarily save the current pipeline. */ |
299 | static PROCESS *saved_pipeline; | |
300 | static int saved_already_making_children; | |
726f6388 JA |
301 | |
302 | /* Set this to non-zero whenever you don't want the jobs list to change at | |
303 | all: no jobs deleted and no status change notifications. This is used, | |
304 | for example, when executing SIGCHLD traps, which may run arbitrary | |
305 | commands. */ | |
ccc6cda3 | 306 | static int jobs_list_frozen; |
726f6388 | 307 | |
28ef6c31 JA |
308 | static char retcode_name_buffer[64]; |
309 | ||
726f6388 JA |
310 | #if !defined (_POSIX_VERSION) |
311 | ||
312 | /* These are definitions to map POSIX 1003.1 functions onto existing BSD | |
313 | library functions and system calls. */ | |
314 | #define setpgid(pid, pgrp) setpgrp (pid, pgrp) | |
315 | #define tcsetpgrp(fd, pgrp) ioctl ((fd), TIOCSPGRP, &(pgrp)) | |
316 | ||
317 | pid_t | |
318 | tcgetpgrp (fd) | |
319 | int fd; | |
320 | { | |
321 | pid_t pgrp; | |
322 | ||
323 | /* ioctl will handle setting errno correctly. */ | |
324 | if (ioctl (fd, TIOCGPGRP, &pgrp) < 0) | |
325 | return (-1); | |
326 | return (pgrp); | |
327 | } | |
328 | ||
726f6388 JA |
329 | #endif /* !_POSIX_VERSION */ |
330 | ||
95732b49 JA |
331 | /* Initialize the global job stats structure. */ |
332 | void | |
333 | init_job_stats () | |
334 | { | |
335 | js = zerojs; | |
336 | } | |
337 | ||
726f6388 JA |
338 | /* Return the working directory for the current process. Unlike |
339 | job_working_directory, this does not call malloc (), nor do any | |
340 | of the functions it calls. This is so that it can safely be called | |
341 | from a signal handler. */ | |
342 | static char * | |
343 | current_working_directory () | |
344 | { | |
345 | char *dir; | |
ccc6cda3 | 346 | static char d[PATH_MAX]; |
726f6388 JA |
347 | |
348 | dir = get_string_value ("PWD"); | |
349 | ||
ccc6cda3 | 350 | if (dir == 0 && the_current_working_directory && no_symbolic_links) |
726f6388 JA |
351 | dir = the_current_working_directory; |
352 | ||
ccc6cda3 | 353 | if (dir == 0) |
726f6388 | 354 | { |
ccc6cda3 | 355 | dir = getcwd (d, sizeof(d)); |
726f6388 JA |
356 | if (dir) |
357 | dir = d; | |
358 | } | |
359 | ||
ccc6cda3 | 360 | return (dir == 0) ? "<unknown>" : dir; |
726f6388 JA |
361 | } |
362 | ||
363 | /* Return the working directory for the current process. */ | |
364 | static char * | |
365 | job_working_directory () | |
366 | { | |
367 | char *dir; | |
368 | ||
369 | dir = get_string_value ("PWD"); | |
370 | if (dir) | |
371 | return (savestring (dir)); | |
372 | ||
373 | dir = get_working_directory ("job-working-directory"); | |
374 | if (dir) | |
375 | return (dir); | |
376 | ||
377 | return (savestring ("<unknown>")); | |
378 | } | |
379 | ||
380 | void | |
381 | making_children () | |
382 | { | |
383 | if (already_making_children) | |
384 | return; | |
385 | ||
386 | already_making_children = 1; | |
387 | start_pipeline (); | |
388 | } | |
389 | ||
390 | void | |
391 | stop_making_children () | |
392 | { | |
393 | already_making_children = 0; | |
394 | } | |
395 | ||
396 | void | |
397 | cleanup_the_pipeline () | |
398 | { | |
95732b49 JA |
399 | PROCESS *disposer; |
400 | sigset_t set, oset; | |
401 | ||
402 | BLOCK_CHILD (set, oset); | |
403 | disposer = the_pipeline; | |
404 | the_pipeline = (PROCESS *)NULL; | |
405 | UNBLOCK_CHILD (oset); | |
406 | ||
407 | if (disposer) | |
408 | discard_pipeline (disposer); | |
726f6388 JA |
409 | } |
410 | ||
ccc6cda3 JA |
411 | void |
412 | save_pipeline (clear) | |
413 | int clear; | |
414 | { | |
415 | saved_pipeline = the_pipeline; | |
ccc6cda3 JA |
416 | if (clear) |
417 | the_pipeline = (PROCESS *)NULL; | |
95732b49 | 418 | saved_already_making_children = already_making_children; |
ccc6cda3 JA |
419 | } |
420 | ||
421 | void | |
422 | restore_pipeline (discard) | |
423 | int discard; | |
424 | { | |
425 | PROCESS *old_pipeline; | |
426 | ||
427 | old_pipeline = the_pipeline; | |
428 | the_pipeline = saved_pipeline; | |
429 | already_making_children = saved_already_making_children; | |
430 | if (discard) | |
431 | discard_pipeline (old_pipeline); | |
432 | } | |
433 | ||
726f6388 JA |
434 | /* Start building a pipeline. */ |
435 | void | |
436 | start_pipeline () | |
437 | { | |
438 | if (the_pipeline) | |
439 | { | |
ccc6cda3 | 440 | cleanup_the_pipeline (); |
726f6388 JA |
441 | pipeline_pgrp = 0; |
442 | #if defined (PGRP_PIPE) | |
443 | pipe_close (pgrp_pipe); | |
444 | #endif | |
445 | } | |
446 | ||
447 | #if defined (PGRP_PIPE) | |
448 | if (job_control) | |
449 | { | |
450 | if (pipe (pgrp_pipe) == -1) | |
ccc6cda3 | 451 | sys_error ("start_pipeline: pgrp pipe"); |
726f6388 JA |
452 | } |
453 | #endif | |
454 | } | |
455 | ||
456 | /* Stop building a pipeline. Install the process list in the job array. | |
457 | This returns the index of the newly installed job. | |
458 | DEFERRED is a command structure to be executed upon satisfactory | |
459 | execution exit of this pipeline. */ | |
460 | int | |
461 | stop_pipeline (async, deferred) | |
462 | int async; | |
463 | COMMAND *deferred; | |
464 | { | |
465 | register int i, j; | |
ccc6cda3 | 466 | JOB *newjob; |
726f6388 JA |
467 | sigset_t set, oset; |
468 | ||
469 | BLOCK_CHILD (set, oset); | |
470 | ||
471 | #if defined (PGRP_PIPE) | |
472 | /* The parent closes the process group synchronization pipe. */ | |
473 | pipe_close (pgrp_pipe); | |
474 | #endif | |
ccc6cda3 | 475 | |
726f6388 JA |
476 | cleanup_dead_jobs (); |
477 | ||
95732b49 | 478 | if (js.j_jobslots == 0) |
726f6388 | 479 | { |
95732b49 JA |
480 | js.j_jobslots = JOB_SLOTS; |
481 | jobs = (JOB **)xmalloc (js.j_jobslots * sizeof (JOB *)); | |
726f6388 JA |
482 | |
483 | /* Now blank out these new entries. */ | |
95732b49 | 484 | for (i = 0; i < js.j_jobslots; i++) |
726f6388 | 485 | jobs[i] = (JOB *)NULL; |
95732b49 JA |
486 | |
487 | js.j_firstj = js.j_lastj = js.j_njobs = 0; | |
726f6388 JA |
488 | } |
489 | ||
490 | /* Scan from the last slot backward, looking for the next free one. */ | |
b80f6443 | 491 | /* XXX - revisit this interactive assumption */ |
95732b49 | 492 | /* XXX - this way for now */ |
726f6388 JA |
493 | if (interactive) |
494 | { | |
95732b49 | 495 | for (i = js.j_jobslots; i; i--) |
726f6388 JA |
496 | if (jobs[i - 1]) |
497 | break; | |
498 | } | |
499 | else | |
500 | { | |
95732b49 JA |
501 | #if 0 |
502 | /* This wraps around, but makes it inconvenient to extend the array */ | |
503 | for (i = js.j_lastj+1; i != js.j_lastj; i++) | |
504 | { | |
505 | if (i >= js.j_jobslots) | |
506 | i = 0; | |
507 | if (jobs[i] == 0) | |
508 | break; | |
509 | } | |
510 | if (i == js.j_lastj) | |
511 | i = js.j_jobslots; | |
512 | #else | |
513 | /* This doesn't wrap around yet. */ | |
514 | for (i = js.j_lastj ? js.j_lastj + 1 : js.j_lastj; i < js.j_jobslots; i++) | |
ccc6cda3 | 515 | if (jobs[i] == 0) |
726f6388 | 516 | break; |
95732b49 | 517 | #endif |
726f6388 JA |
518 | } |
519 | ||
520 | /* Do we need more room? */ | |
7117c2d2 JA |
521 | |
522 | /* First try compaction */ | |
95732b49 | 523 | if ((interactive_shell == 0 || subshell_environment) && i == js.j_jobslots && js.j_jobslots >= MAX_JOBS_IN_ARRAY) |
7117c2d2 JA |
524 | i = compact_jobs_list (0); |
525 | ||
526 | /* If we can't compact, reallocate */ | |
95732b49 | 527 | if (i == js.j_jobslots) |
726f6388 | 528 | { |
95732b49 JA |
529 | js.j_jobslots += JOB_SLOTS; |
530 | jobs = (JOB **)xrealloc (jobs, (js.j_jobslots * sizeof (JOB *))); | |
726f6388 | 531 | |
95732b49 | 532 | for (j = i; j < js.j_jobslots; j++) |
726f6388 JA |
533 | jobs[j] = (JOB *)NULL; |
534 | } | |
535 | ||
536 | /* Add the current pipeline to the job list. */ | |
537 | if (the_pipeline) | |
538 | { | |
539 | register PROCESS *p; | |
95732b49 | 540 | int any_running, any_stopped, n; |
726f6388 JA |
541 | |
542 | newjob = (JOB *)xmalloc (sizeof (JOB)); | |
543 | ||
95732b49 | 544 | for (n = 1, p = the_pipeline; p->next != the_pipeline; n++, p = p->next) |
ccc6cda3 | 545 | ; |
726f6388 JA |
546 | p->next = (PROCESS *)NULL; |
547 | newjob->pipe = REVERSE_LIST (the_pipeline, PROCESS *); | |
ccc6cda3 JA |
548 | for (p = newjob->pipe; p->next; p = p->next) |
549 | ; | |
726f6388 JA |
550 | p->next = newjob->pipe; |
551 | ||
552 | the_pipeline = (PROCESS *)NULL; | |
553 | newjob->pgrp = pipeline_pgrp; | |
554 | pipeline_pgrp = 0; | |
555 | ||
556 | newjob->flags = 0; | |
557 | ||
558 | /* Flag to see if in another pgrp. */ | |
559 | if (job_control) | |
560 | newjob->flags |= J_JOBCONTROL; | |
561 | ||
562 | /* Set the state of this pipeline. */ | |
ccc6cda3 | 563 | p = newjob->pipe; |
95732b49 | 564 | any_running = any_stopped = 0; |
ccc6cda3 JA |
565 | do |
566 | { | |
95732b49 JA |
567 | any_running |= PRUNNING (p); |
568 | any_stopped |= PSTOPPED (p); | |
ccc6cda3 JA |
569 | p = p->next; |
570 | } | |
571 | while (p != newjob->pipe); | |
726f6388 | 572 | |
95732b49 | 573 | newjob->state = any_running ? JRUNNING : (any_stopped ? JSTOPPED : JDEAD); |
726f6388 JA |
574 | newjob->wd = job_working_directory (); |
575 | newjob->deferred = deferred; | |
576 | ||
f73dda09 | 577 | newjob->j_cleanup = (sh_vptrfunc_t *)NULL; |
ccc6cda3 JA |
578 | newjob->cleanarg = (PTR_T) NULL; |
579 | ||
726f6388 | 580 | jobs[i] = newjob; |
ccc6cda3 JA |
581 | if (newjob->state == JDEAD && (newjob->flags & J_FOREGROUND)) |
582 | setjstatus (i); | |
95732b49 JA |
583 | if (newjob->state == JDEAD) |
584 | { | |
585 | js.c_reaped += n; /* wouldn't have been done since this was not part of a job */ | |
586 | js.j_ndead++; | |
587 | } | |
588 | js.c_injobs += n; | |
589 | ||
590 | js.j_lastj = i; | |
591 | js.j_njobs++; | |
726f6388 | 592 | } |
ccc6cda3 JA |
593 | else |
594 | newjob = (JOB *)NULL; | |
726f6388 | 595 | |
95732b49 JA |
596 | if (newjob) |
597 | js.j_lastmade = newjob; | |
598 | ||
726f6388 JA |
599 | if (async) |
600 | { | |
601 | if (newjob) | |
95732b49 JA |
602 | { |
603 | newjob->flags &= ~J_FOREGROUND; | |
604 | newjob->flags |= J_ASYNC; | |
605 | js.j_lastasync = newjob; | |
606 | } | |
726f6388 JA |
607 | reset_current (); |
608 | } | |
609 | else | |
610 | { | |
611 | if (newjob) | |
612 | { | |
613 | newjob->flags |= J_FOREGROUND; | |
614 | /* | |
615 | * !!!!! NOTE !!!!! (chet@ins.cwru.edu) | |
616 | * | |
617 | * The currently-accepted job control wisdom says to set the | |
618 | * terminal's process group n+1 times in an n-step pipeline: | |
619 | * once in the parent and once in each child. This is where | |
620 | * the parent gives it away. | |
621 | * | |
622 | */ | |
623 | if (job_control && newjob->pgrp) | |
28ef6c31 | 624 | give_terminal_to (newjob->pgrp, 0); |
726f6388 JA |
625 | } |
626 | } | |
627 | ||
628 | stop_making_children (); | |
629 | UNBLOCK_CHILD (oset); | |
95732b49 JA |
630 | return (js.j_current); |
631 | } | |
632 | ||
633 | /* Functions to manage the list of exited background pids whose status has | |
634 | been saved. */ | |
635 | ||
636 | static struct pidstat * | |
637 | bgp_alloc (pid, status) | |
638 | pid_t pid; | |
639 | int status; | |
640 | { | |
641 | struct pidstat *ps; | |
642 | ||
643 | ps = (struct pidstat *)xmalloc (sizeof (struct pidstat)); | |
644 | ps->pid = pid; | |
645 | ps->status = status; | |
646 | ps->next = (struct pidstat *)0; | |
647 | return ps; | |
726f6388 JA |
648 | } |
649 | ||
95732b49 JA |
650 | static struct pidstat * |
651 | bgp_add (pid, status) | |
652 | pid_t pid; | |
653 | int status; | |
654 | { | |
655 | struct pidstat *ps; | |
656 | ||
657 | ps = bgp_alloc (pid, status); | |
658 | ||
659 | if (bgpids.list == 0) | |
660 | { | |
661 | bgpids.list = bgpids.end = ps; | |
662 | bgpids.npid = 0; /* just to make sure */ | |
663 | } | |
664 | else | |
665 | { | |
666 | bgpids.end->next = ps; | |
667 | bgpids.end = ps; | |
668 | } | |
669 | bgpids.npid++; | |
670 | ||
671 | if (bgpids.npid > js.c_childmax) | |
672 | bgp_prune (); | |
673 | ||
674 | return ps; | |
675 | } | |
676 | ||
677 | static int | |
678 | bgp_delete (pid) | |
679 | pid_t pid; | |
680 | { | |
681 | struct pidstat *prev, *p; | |
682 | ||
683 | for (prev = p = bgpids.list; p; prev = p, p = p->next) | |
684 | if (p->pid == pid) | |
685 | { | |
686 | prev->next = p->next; /* remove from list */ | |
687 | break; | |
688 | } | |
689 | ||
690 | if (p == 0) | |
691 | return 0; /* not found */ | |
692 | ||
693 | #if defined (DEBUG) | |
694 | itrace("bgp_delete: deleting %d", pid); | |
695 | #endif | |
696 | ||
697 | /* Housekeeping in the border cases. */ | |
698 | if (p == bgpids.list) | |
699 | bgpids.list = bgpids.list->next; | |
700 | else if (p == bgpids.end) | |
701 | bgpids.end = prev; | |
702 | ||
703 | bgpids.npid--; | |
704 | if (bgpids.npid == 0) | |
705 | bgpids.list = bgpids.end = 0; | |
706 | else if (bgpids.npid == 1) | |
707 | bgpids.end = bgpids.list; /* just to make sure */ | |
708 | ||
709 | free (p); | |
710 | return 1; | |
711 | } | |
712 | ||
713 | /* Clear out the list of saved statuses */ | |
714 | static void | |
715 | bgp_clear () | |
716 | { | |
717 | struct pidstat *ps, *p; | |
718 | ||
719 | for (ps = bgpids.list; ps; ) | |
720 | { | |
721 | p = ps; | |
722 | ps = ps->next; | |
723 | free (p); | |
724 | } | |
725 | bgpids.list = bgpids.end = 0; | |
726 | bgpids.npid = 0; | |
727 | } | |
728 | ||
729 | /* Search for PID in the list of saved background pids; return its status if | |
730 | found. If not found, return -1. */ | |
731 | static int | |
732 | bgp_search (pid) | |
733 | pid_t pid; | |
734 | { | |
735 | struct pidstat *ps; | |
736 | ||
737 | for (ps = bgpids.list ; ps; ps = ps->next) | |
738 | if (ps->pid == pid) | |
739 | return ps->status; | |
740 | return -1; | |
741 | } | |
742 | ||
743 | static void | |
744 | bgp_prune () | |
745 | { | |
746 | struct pidstat *ps, *p; | |
747 | ||
748 | while (bgpids.npid > js.c_childmax) | |
749 | { | |
750 | ps = bgpids.list; | |
751 | bgpids.list = bgpids.list->next; | |
752 | free (ps); | |
753 | bgpids.npid--; | |
754 | } | |
755 | } | |
756 | ||
757 | /* Reset the values of js.j_lastj and js.j_firstj after one or both have | |
758 | been deleted. The caller should check whether js.j_njobs is 0 before | |
759 | calling this. This wraps around, but the rest of the code does not. At | |
760 | this point, it should not matter. */ | |
761 | static void | |
762 | reset_job_indices () | |
763 | { | |
764 | int old; | |
765 | ||
766 | if (jobs[js.j_firstj] == 0) | |
767 | { | |
768 | old = js.j_firstj++; | |
769 | while (js.j_firstj != old) | |
770 | { | |
771 | if (js.j_firstj >= js.j_jobslots) | |
772 | js.j_firstj = 0; | |
773 | if (jobs[js.j_firstj]) | |
774 | break; | |
775 | js.j_firstj++; | |
776 | } | |
777 | if (js.j_firstj == old) | |
778 | js.j_firstj = js.j_lastj = js.j_njobs = 0; | |
779 | } | |
780 | if (jobs[js.j_lastj] == 0) | |
781 | { | |
782 | old = js.j_lastj--; | |
783 | while (js.j_lastj != old) | |
784 | { | |
785 | if (js.j_lastj < 0) | |
786 | js.j_lastj = js.j_jobslots - 1; | |
787 | if (jobs[js.j_lastj]) | |
788 | break; | |
789 | js.j_lastj--; | |
790 | } | |
791 | if (js.j_lastj == old) | |
792 | js.j_firstj = js.j_lastj = js.j_njobs = 0; | |
793 | } | |
794 | } | |
795 | ||
726f6388 JA |
796 | /* Delete all DEAD jobs that the user had received notification about. */ |
797 | static void | |
798 | cleanup_dead_jobs () | |
799 | { | |
800 | register int i; | |
7117c2d2 | 801 | int os; |
726f6388 | 802 | |
95732b49 | 803 | if (js.j_jobslots == 0 || jobs_list_frozen) |
726f6388 JA |
804 | return; |
805 | ||
7117c2d2 | 806 | QUEUE_SIGCHLD(os); |
726f6388 | 807 | |
95732b49 JA |
808 | /* XXX could use js.j_firstj here */ |
809 | for (i = 0; i < js.j_jobslots; i++) | |
810 | { | |
811 | #if defined (DEBUG) | |
812 | if (i < js.j_firstj && jobs[i]) | |
813 | itrace("cleanup_dead_jobs: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
814 | #endif | |
726f6388 | 815 | |
95732b49 JA |
816 | if (jobs[i] && DEADJOB (i) && IS_NOTIFIED (i)) |
817 | delete_job (i, 0); | |
818 | } | |
7117c2d2 JA |
819 | UNQUEUE_SIGCHLD(os); |
820 | } | |
821 | ||
7117c2d2 | 822 | static int |
95732b49 | 823 | processes_in_job (job) |
7117c2d2 | 824 | { |
95732b49 JA |
825 | int nproc; |
826 | register PROCESS *p; | |
7117c2d2 | 827 | |
95732b49 JA |
828 | nproc = 0; |
829 | p = jobs[job]->pipe; | |
830 | do | |
831 | { | |
832 | p = p->next; | |
833 | nproc++; | |
834 | } | |
835 | while (p != jobs[job]->pipe); | |
7117c2d2 | 836 | |
95732b49 JA |
837 | return nproc; |
838 | } | |
7117c2d2 | 839 | |
95732b49 JA |
840 | /* Reallocate and compress the jobs list. This returns with a jobs array |
841 | whose size is a multiple of JOB_SLOTS and can hold the current number of | |
842 | jobs. Heuristics are used to minimize the number of new reallocs. */ | |
843 | static void | |
844 | realloc_jobs_list () | |
845 | { | |
846 | sigset_t set, oset; | |
847 | int nsize, i, j; | |
848 | JOB **nlist; | |
7117c2d2 | 849 | |
95732b49 JA |
850 | nsize = ((js.j_njobs + JOB_SLOTS - 1) / JOB_SLOTS); |
851 | nsize *= JOB_SLOTS; | |
852 | i = js.j_njobs % JOB_SLOTS; | |
853 | if (i == 0 || i > (JOB_SLOTS >> 1)) | |
854 | nsize += JOB_SLOTS; | |
7117c2d2 | 855 | |
95732b49 JA |
856 | BLOCK_CHILD (set, oset); |
857 | nlist = (JOB **) xmalloc (nsize * sizeof (JOB *)); | |
858 | for (i = j = 0; i < js.j_jobslots; i++) | |
7117c2d2 | 859 | if (jobs[i]) |
95732b49 | 860 | nlist[j++] = jobs[i]; |
7117c2d2 | 861 | |
95732b49 JA |
862 | js.j_firstj = 0; |
863 | js.j_lastj = (j > 0) ? j - 1: 0; | |
864 | js.j_jobslots = nsize; | |
7117c2d2 JA |
865 | |
866 | free (jobs); | |
95732b49 | 867 | jobs = nlist; |
7117c2d2 | 868 | |
726f6388 | 869 | UNBLOCK_CHILD (oset); |
95732b49 JA |
870 | } |
871 | ||
872 | /* Compact the jobs list by removing dead jobs. Assumed that we have filled | |
873 | the jobs array to some predefined maximum. Called when the shell is not | |
874 | the foreground process (subshell_environment != 0). Returns the first | |
875 | available slot in the compacted list. If that value is js.j_jobslots, then | |
876 | the list needs to be reallocated. The jobs array is in new memory if | |
877 | this returns > 0 and < js.j_jobslots. FLAGS is reserved for future use. */ | |
878 | static int | |
879 | compact_jobs_list (flags) | |
880 | int flags; | |
881 | { | |
882 | if (js.j_jobslots == 0 || jobs_list_frozen) | |
883 | return js.j_jobslots; | |
884 | ||
885 | reap_dead_jobs (); | |
886 | realloc_jobs_list (); | |
7117c2d2 | 887 | |
95732b49 | 888 | return (js.j_lastj); |
726f6388 JA |
889 | } |
890 | ||
891 | /* Delete the job at INDEX from the job list. Must be called | |
892 | with SIGCHLD blocked. */ | |
893 | void | |
cce855bc JA |
894 | delete_job (job_index, warn_stopped) |
895 | int job_index, warn_stopped; | |
726f6388 JA |
896 | { |
897 | register JOB *temp; | |
95732b49 JA |
898 | PROCESS *proc; |
899 | int ndel, status; | |
900 | pid_t pid; | |
726f6388 | 901 | |
95732b49 | 902 | if (js.j_jobslots == 0 || jobs_list_frozen) |
726f6388 JA |
903 | return; |
904 | ||
cce855bc | 905 | if (warn_stopped && subshell_environment == 0 && STOPPED (job_index)) |
b80f6443 | 906 | internal_warning (_("deleting stopped job %d with process group %ld"), job_index+1, (long)jobs[job_index]->pgrp); |
726f6388 | 907 | temp = jobs[job_index]; |
95732b49 | 908 | if (job_index == js.j_current || job_index == js.j_previous) |
726f6388 JA |
909 | reset_current (); |
910 | ||
95732b49 JA |
911 | proc = find_last_proc (job_index, 0); |
912 | /* Could do this just for J_ASYNC jobs, but we save all. */ | |
913 | bgp_add (proc->pid, process_exit_status (proc->status)); | |
914 | ||
726f6388 JA |
915 | jobs[job_index] = (JOB *)NULL; |
916 | ||
95732b49 JA |
917 | if (temp == js.j_lastmade) |
918 | js.j_lastmade = 0; | |
919 | else if (temp == js.j_lastasync) | |
920 | js.j_lastasync = 0; | |
921 | ||
726f6388 | 922 | free (temp->wd); |
95732b49 JA |
923 | ndel = discard_pipeline (temp->pipe); |
924 | ||
925 | js.c_injobs -= ndel; | |
926 | if (temp->state == JDEAD) | |
927 | { | |
928 | js.c_reaped -= ndel; | |
929 | js.j_ndead--; | |
930 | if (js.c_reaped < 0) | |
931 | { | |
932 | #ifdef DEBUG | |
933 | 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); | |
934 | #endif | |
935 | js.c_reaped = 0; | |
936 | } | |
937 | } | |
726f6388 JA |
938 | |
939 | if (temp->deferred) | |
940 | dispose_command (temp->deferred); | |
941 | ||
942 | free (temp); | |
95732b49 JA |
943 | |
944 | js.j_njobs--; | |
945 | if (js.j_njobs == 0) | |
946 | js.j_firstj = js.j_lastj = 0; | |
947 | else if (jobs[js.j_firstj] == 0 || jobs[js.j_lastj] == 0) | |
948 | reset_job_indices (); | |
726f6388 JA |
949 | } |
950 | ||
ccc6cda3 JA |
951 | /* Must be called with SIGCHLD blocked. */ |
952 | void | |
953 | nohup_job (job_index) | |
954 | int job_index; | |
955 | { | |
956 | register JOB *temp; | |
957 | ||
95732b49 | 958 | if (js.j_jobslots == 0) |
cce855bc JA |
959 | return; |
960 | ||
d166f048 | 961 | if (temp = jobs[job_index]) |
ccc6cda3 JA |
962 | temp->flags |= J_NOHUP; |
963 | } | |
964 | ||
726f6388 | 965 | /* Get rid of the data structure associated with a process chain. */ |
95732b49 | 966 | static int |
726f6388 JA |
967 | discard_pipeline (chain) |
968 | register PROCESS *chain; | |
969 | { | |
970 | register PROCESS *this, *next; | |
95732b49 | 971 | int n; |
726f6388 JA |
972 | |
973 | this = chain; | |
95732b49 | 974 | n = 0; |
726f6388 JA |
975 | do |
976 | { | |
977 | next = this->next; | |
ccc6cda3 | 978 | FREE (this->command); |
726f6388 | 979 | free (this); |
95732b49 | 980 | n++; |
726f6388 JA |
981 | this = next; |
982 | } | |
983 | while (this != chain); | |
95732b49 JA |
984 | |
985 | return n; | |
726f6388 JA |
986 | } |
987 | ||
988 | /* Add this process to the chain being built in the_pipeline. | |
989 | NAME is the command string that will be exec'ed later. | |
990 | PID is the process id of the child. */ | |
991 | static void | |
992 | add_process (name, pid) | |
993 | char *name; | |
994 | pid_t pid; | |
995 | { | |
ccc6cda3 | 996 | PROCESS *t, *p; |
726f6388 | 997 | |
95732b49 JA |
998 | #if defined (RECYCLES_PIDS) |
999 | int j; | |
1000 | p = find_process (pid, 0, &j); | |
1001 | if (p) | |
1002 | { | |
1003 | # ifdef DEBUG | |
1004 | if (j == NO_JOB) | |
1005 | internal_warning ("add_process: process %5ld (%s) in the_pipeline", (long)p->pid, p->command); | |
1006 | # endif | |
1007 | if (PALIVE (p)) | |
1008 | internal_warning ("add_process: pid %5ld (%s) marked as still alive", (long)p->pid, p->command); | |
1009 | p->running = PS_RECYCLED; /* mark as recycled */ | |
1010 | } | |
1011 | #endif | |
1012 | ||
ccc6cda3 | 1013 | t = (PROCESS *)xmalloc (sizeof (PROCESS)); |
726f6388 JA |
1014 | t->next = the_pipeline; |
1015 | t->pid = pid; | |
1016 | WSTATUS (t->status) = 0; | |
7117c2d2 | 1017 | t->running = PS_RUNNING; |
726f6388 JA |
1018 | t->command = name; |
1019 | the_pipeline = t; | |
1020 | ||
ccc6cda3 | 1021 | if (t->next == 0) |
726f6388 JA |
1022 | t->next = t; |
1023 | else | |
1024 | { | |
ccc6cda3 | 1025 | p = t->next; |
726f6388 JA |
1026 | while (p->next != t->next) |
1027 | p = p->next; | |
1028 | p->next = t; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | #if 0 | |
1033 | /* Take the last job and make it the first job. Must be called with | |
1034 | SIGCHLD blocked. */ | |
ccc6cda3 | 1035 | int |
726f6388 JA |
1036 | rotate_the_pipeline () |
1037 | { | |
1038 | PROCESS *p; | |
1039 | ||
1040 | if (the_pipeline->next == the_pipeline) | |
1041 | return; | |
1042 | for (p = the_pipeline; p->next != the_pipeline; p = p->next) | |
1043 | ; | |
1044 | the_pipeline = p; | |
1045 | } | |
1046 | ||
1047 | /* Reverse the order of the processes in the_pipeline. Must be called with | |
1048 | SIGCHLD blocked. */ | |
ccc6cda3 | 1049 | int |
726f6388 JA |
1050 | reverse_the_pipeline () |
1051 | { | |
1052 | PROCESS *p, *n; | |
1053 | ||
1054 | if (the_pipeline->next == the_pipeline) | |
1055 | return; | |
1056 | ||
1057 | for (p = the_pipeline; p->next != the_pipeline; p = p->next) | |
1058 | ; | |
1059 | p->next = (PROCESS *)NULL; | |
1060 | ||
1061 | n = REVERSE_LIST (the_pipeline, PROCESS *); | |
1062 | ||
1063 | the_pipeline = n; | |
1064 | for (p = the_pipeline; p->next; p = p->next) | |
1065 | ; | |
1066 | p->next = the_pipeline; | |
1067 | } | |
1068 | #endif | |
1069 | ||
1070 | /* Map FUNC over the list of jobs. If FUNC returns non-zero, | |
1071 | then it is time to stop mapping, and that is the return value | |
1072 | for map_over_jobs. FUNC is called with a JOB, arg1, arg2, | |
1073 | and INDEX. */ | |
1074 | static int | |
1075 | map_over_jobs (func, arg1, arg2) | |
f73dda09 | 1076 | sh_job_map_func_t *func; |
726f6388 JA |
1077 | int arg1, arg2; |
1078 | { | |
1079 | register int i; | |
1080 | int result; | |
1081 | sigset_t set, oset; | |
1082 | ||
95732b49 | 1083 | if (js.j_jobslots == 0) |
28ef6c31 JA |
1084 | return 0; |
1085 | ||
726f6388 | 1086 | BLOCK_CHILD (set, oset); |
726f6388 | 1087 | |
95732b49 JA |
1088 | /* XXX could use js.j_firstj here */ |
1089 | for (i = result = 0; i < js.j_jobslots; i++) | |
726f6388 | 1090 | { |
95732b49 JA |
1091 | #if defined (DEBUG) |
1092 | if (i < js.j_firstj && jobs[i]) | |
1093 | itrace("map_over_jobs: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
1094 | #endif | |
726f6388 JA |
1095 | if (jobs[i]) |
1096 | { | |
1097 | result = (*func)(jobs[i], arg1, arg2, i); | |
1098 | if (result) | |
1099 | break; | |
1100 | } | |
1101 | } | |
1102 | ||
1103 | UNBLOCK_CHILD (oset); | |
ccc6cda3 | 1104 | |
726f6388 JA |
1105 | return (result); |
1106 | } | |
1107 | ||
1108 | /* Cause all the jobs in the current pipeline to exit. */ | |
1109 | void | |
1110 | terminate_current_pipeline () | |
1111 | { | |
1112 | if (pipeline_pgrp && pipeline_pgrp != shell_pgrp) | |
1113 | { | |
1114 | killpg (pipeline_pgrp, SIGTERM); | |
1115 | killpg (pipeline_pgrp, SIGCONT); | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | /* Cause all stopped jobs to exit. */ | |
1120 | void | |
1121 | terminate_stopped_jobs () | |
1122 | { | |
1123 | register int i; | |
1124 | ||
95732b49 JA |
1125 | /* XXX could use js.j_firstj here */ |
1126 | for (i = 0; i < js.j_jobslots; i++) | |
726f6388 | 1127 | { |
ccc6cda3 | 1128 | if (jobs[i] && STOPPED (i)) |
726f6388 JA |
1129 | { |
1130 | killpg (jobs[i]->pgrp, SIGTERM); | |
1131 | killpg (jobs[i]->pgrp, SIGCONT); | |
1132 | } | |
1133 | } | |
1134 | } | |
1135 | ||
ccc6cda3 JA |
1136 | /* Cause all jobs, running or stopped, to receive a hangup signal. If |
1137 | a job is marked J_NOHUP, don't send the SIGHUP. */ | |
726f6388 JA |
1138 | void |
1139 | hangup_all_jobs () | |
1140 | { | |
1141 | register int i; | |
1142 | ||
95732b49 JA |
1143 | /* XXX could use js.j_firstj here */ |
1144 | for (i = 0; i < js.j_jobslots; i++) | |
726f6388 JA |
1145 | { |
1146 | if (jobs[i]) | |
1147 | { | |
ccc6cda3 JA |
1148 | if ((jobs[i]->flags & J_NOHUP) == 0) |
1149 | killpg (jobs[i]->pgrp, SIGHUP); | |
1150 | if (STOPPED (i)) | |
726f6388 JA |
1151 | killpg (jobs[i]->pgrp, SIGCONT); |
1152 | } | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | void | |
1157 | kill_current_pipeline () | |
1158 | { | |
1159 | stop_making_children (); | |
1160 | start_pipeline (); | |
1161 | } | |
1162 | ||
1163 | /* Return the pipeline that PID belongs to. Note that the pipeline | |
95732b49 JA |
1164 | doesn't have to belong to a job. Must be called with SIGCHLD blocked. |
1165 | If JOBP is non-null, return the index of the job containing PID. */ | |
726f6388 | 1166 | static PROCESS * |
95732b49 | 1167 | find_pipeline (pid, alive_only, jobp) |
726f6388 | 1168 | pid_t pid; |
95732b49 | 1169 | int alive_only; |
7117c2d2 | 1170 | int *jobp; /* index into jobs list or NO_JOB */ |
726f6388 JA |
1171 | { |
1172 | int job; | |
95732b49 | 1173 | PROCESS *p; |
726f6388 JA |
1174 | |
1175 | /* See if this process is in the pipeline that we are building. */ | |
7117c2d2 JA |
1176 | if (jobp) |
1177 | *jobp = NO_JOB; | |
726f6388 JA |
1178 | if (the_pipeline) |
1179 | { | |
ccc6cda3 | 1180 | p = the_pipeline; |
726f6388 JA |
1181 | do |
1182 | { | |
95732b49 JA |
1183 | /* Return it if we found it. Don't ever return a recycled pid. */ |
1184 | if (p->pid == pid && ((alive_only == 0 && PRECYCLED(p) == 0) || PALIVE(p))) | |
1185 | return (p); | |
726f6388 JA |
1186 | |
1187 | p = p->next; | |
1188 | } | |
1189 | while (p != the_pipeline); | |
1190 | } | |
1191 | ||
95732b49 | 1192 | job = find_job (pid, alive_only, &p); |
7117c2d2 JA |
1193 | if (jobp) |
1194 | *jobp = job; | |
ccc6cda3 | 1195 | return (job == NO_JOB) ? (PROCESS *)NULL : jobs[job]->pipe; |
726f6388 JA |
1196 | } |
1197 | ||
95732b49 JA |
1198 | /* Return the PROCESS * describing PID. If JOBP is non-null return the index |
1199 | into the jobs array of the job containing PID. Must be called with | |
1200 | SIGCHLD blocked. */ | |
1201 | static PROCESS * | |
1202 | find_process (pid, alive_only, jobp) | |
1203 | pid_t pid; | |
1204 | int alive_only; | |
1205 | int *jobp; /* index into jobs list or NO_JOB */ | |
1206 | { | |
1207 | PROCESS *p; | |
1208 | ||
1209 | p = find_pipeline (pid, alive_only, jobp); | |
1210 | while (p && p->pid != pid) | |
1211 | p = p->next; | |
1212 | return p; | |
1213 | } | |
1214 | ||
726f6388 JA |
1215 | /* Return the job index that PID belongs to, or NO_JOB if it doesn't |
1216 | belong to any job. Must be called with SIGCHLD blocked. */ | |
1217 | static int | |
95732b49 | 1218 | find_job (pid, alive_only, procp) |
726f6388 | 1219 | pid_t pid; |
95732b49 JA |
1220 | int alive_only; |
1221 | PROCESS **procp; | |
726f6388 JA |
1222 | { |
1223 | register int i; | |
95732b49 | 1224 | PROCESS *p; |
726f6388 | 1225 | |
95732b49 JA |
1226 | /* XXX could use js.j_firstj here */ |
1227 | for (i = 0; i < js.j_jobslots; i++) | |
726f6388 | 1228 | { |
95732b49 JA |
1229 | #if defined (DEBUG) |
1230 | if (i < js.j_firstj && jobs[i]) | |
1231 | itrace("find_job: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
1232 | #endif | |
726f6388 JA |
1233 | if (jobs[i]) |
1234 | { | |
1235 | p = jobs[i]->pipe; | |
1236 | ||
1237 | do | |
1238 | { | |
95732b49 | 1239 | if (p->pid == pid && ((alive_only == 0 && PRECYCLED(p) == 0) || PALIVE(p))) |
7117c2d2 | 1240 | { |
95732b49 JA |
1241 | if (procp) |
1242 | *procp = p; | |
1243 | return (i); | |
7117c2d2 | 1244 | } |
726f6388 JA |
1245 | |
1246 | p = p->next; | |
1247 | } | |
1248 | while (p != jobs[i]->pipe); | |
1249 | } | |
1250 | } | |
1251 | ||
1252 | return (NO_JOB); | |
1253 | } | |
1254 | ||
d166f048 JA |
1255 | /* Find a job given a PID. If BLOCK is non-zero, block SIGCHLD as |
1256 | required by find_job. */ | |
1257 | int | |
1258 | get_job_by_pid (pid, block) | |
1259 | pid_t pid; | |
1260 | int block; | |
1261 | { | |
1262 | int job; | |
1263 | sigset_t set, oset; | |
1264 | ||
1265 | if (block) | |
1266 | BLOCK_CHILD (set, oset); | |
7117c2d2 | 1267 | |
95732b49 | 1268 | job = find_job (pid, 0, NULL); |
7117c2d2 | 1269 | |
d166f048 JA |
1270 | if (block) |
1271 | UNBLOCK_CHILD (oset); | |
1272 | ||
1273 | return job; | |
1274 | } | |
1275 | ||
726f6388 JA |
1276 | /* Print descriptive information about the job with leader pid PID. */ |
1277 | void | |
1278 | describe_pid (pid) | |
1279 | pid_t pid; | |
1280 | { | |
1281 | int job; | |
1282 | sigset_t set, oset; | |
1283 | ||
1284 | BLOCK_CHILD (set, oset); | |
1285 | ||
95732b49 | 1286 | job = find_job (pid, 0, NULL); |
726f6388 JA |
1287 | |
1288 | if (job != NO_JOB) | |
95732b49 | 1289 | fprintf (stderr, "[%d] %ld\n", job + 1, (long)pid); |
726f6388 | 1290 | else |
b80f6443 | 1291 | programming_error (_("describe_pid: %ld: no such pid"), (long)pid); |
726f6388 JA |
1292 | |
1293 | UNBLOCK_CHILD (oset); | |
1294 | } | |
1295 | ||
b80f6443 JA |
1296 | static char * |
1297 | j_strsignal (s) | |
1298 | int s; | |
1299 | { | |
1300 | char *x; | |
1301 | ||
1302 | x = strsignal (s); | |
1303 | if (x == 0) | |
1304 | { | |
1305 | x = retcode_name_buffer; | |
1306 | sprintf (x, "Signal %d", s); | |
1307 | } | |
1308 | return x; | |
1309 | } | |
1310 | ||
28ef6c31 JA |
1311 | static char * |
1312 | printable_job_status (j, p, format) | |
1313 | int j; | |
1314 | PROCESS *p; | |
1315 | int format; | |
1316 | { | |
1317 | static char *temp; | |
1318 | int es; | |
1319 | ||
1320 | temp = "Done"; | |
1321 | ||
1322 | if (STOPPED (j) && format == 0) | |
1323 | { | |
1324 | if (posixly_correct == 0 || p == 0 || (WIFSTOPPED (p->status) == 0)) | |
1325 | temp = "Stopped"; | |
1326 | else | |
1327 | { | |
1328 | temp = retcode_name_buffer; | |
1329 | sprintf (temp, "Stopped(%s)", signal_name (WSTOPSIG (p->status))); | |
1330 | } | |
1331 | } | |
1332 | else if (RUNNING (j)) | |
1333 | temp = "Running"; | |
1334 | else | |
1335 | { | |
1336 | if (WIFSTOPPED (p->status)) | |
b80f6443 | 1337 | temp = j_strsignal (WSTOPSIG (p->status)); |
28ef6c31 | 1338 | else if (WIFSIGNALED (p->status)) |
b80f6443 | 1339 | temp = j_strsignal (WTERMSIG (p->status)); |
28ef6c31 JA |
1340 | else if (WIFEXITED (p->status)) |
1341 | { | |
1342 | temp = retcode_name_buffer; | |
1343 | es = WEXITSTATUS (p->status); | |
1344 | if (es == 0) | |
1345 | strcpy (temp, "Done"); | |
1346 | else if (posixly_correct) | |
1347 | sprintf (temp, "Done(%d)", es); | |
1348 | else | |
1349 | sprintf (temp, "Exit %d", es); | |
1350 | } | |
1351 | else | |
1352 | temp = "Unknown status"; | |
1353 | } | |
1354 | ||
1355 | return temp; | |
1356 | } | |
1357 | ||
726f6388 JA |
1358 | /* This is the way to print out information on a job if you |
1359 | know the index. FORMAT is: | |
1360 | ||
1361 | JLIST_NORMAL) [1]+ Running emacs | |
1362 | JLIST_LONG ) [1]+ 2378 Running emacs | |
1363 | -1 ) [1]+ 2378 emacs | |
1364 | ||
1365 | JLIST_NORMAL) [1]+ Stopped ls | more | |
1366 | JLIST_LONG ) [1]+ 2369 Stopped ls | |
1367 | 2367 | more | |
1368 | JLIST_PID_ONLY) | |
1369 | Just list the pid of the process group leader (really | |
1370 | the process group). | |
1371 | JLIST_CHANGED_ONLY) | |
1372 | Use format JLIST_NORMAL, but list only jobs about which | |
1373 | the user has not been notified. */ | |
ccc6cda3 JA |
1374 | |
1375 | /* Print status for pipeline P. If JOB_INDEX is >= 0, it is the index into | |
1376 | the JOBS array corresponding to this pipeline. FORMAT is as described | |
1377 | above. Must be called with SIGCHLD blocked. | |
1378 | ||
1379 | If you're printing a pipeline that's not in the jobs array, like the | |
1380 | current pipeline as it's being created, pass -1 for JOB_INDEX */ | |
726f6388 | 1381 | static void |
ccc6cda3 JA |
1382 | print_pipeline (p, job_index, format, stream) |
1383 | PROCESS *p; | |
726f6388 JA |
1384 | int job_index, format; |
1385 | FILE *stream; | |
1386 | { | |
ccc6cda3 JA |
1387 | PROCESS *first, *last, *show; |
1388 | int es, name_padding; | |
28ef6c31 | 1389 | char *temp; |
726f6388 | 1390 | |
ccc6cda3 JA |
1391 | if (p == 0) |
1392 | return; | |
726f6388 | 1393 | |
ccc6cda3 | 1394 | first = last = p; |
726f6388 JA |
1395 | while (last->next != first) |
1396 | last = last->next; | |
1397 | ||
726f6388 JA |
1398 | for (;;) |
1399 | { | |
1400 | if (p != first) | |
1401 | fprintf (stream, format ? " " : " |"); | |
1402 | ||
ccc6cda3 | 1403 | if (format != JLIST_STANDARD) |
f73dda09 | 1404 | fprintf (stream, "%5ld", (long)p->pid); |
726f6388 JA |
1405 | |
1406 | fprintf (stream, " "); | |
1407 | ||
ccc6cda3 | 1408 | if (format > -1 && job_index >= 0) |
726f6388 | 1409 | { |
ccc6cda3 | 1410 | show = format ? p : last; |
28ef6c31 | 1411 | temp = printable_job_status (job_index, show, format); |
726f6388 JA |
1412 | |
1413 | if (p != first) | |
1414 | { | |
1415 | if (format) | |
1416 | { | |
1417 | if (show->running == first->running && | |
1418 | WSTATUS (show->status) == WSTATUS (first->status)) | |
1419 | temp = ""; | |
1420 | } | |
1421 | else | |
1422 | temp = (char *)NULL; | |
1423 | } | |
1424 | ||
1425 | if (temp) | |
1426 | { | |
726f6388 JA |
1427 | fprintf (stream, "%s", temp); |
1428 | ||
ccc6cda3 JA |
1429 | es = STRLEN (temp); |
1430 | if (es == 0) | |
28ef6c31 | 1431 | es = 2; /* strlen ("| ") */ |
ccc6cda3 | 1432 | name_padding = LONGEST_SIGNAL_DESC - es; |
726f6388 JA |
1433 | |
1434 | fprintf (stream, "%*s", name_padding, ""); | |
1435 | ||
f73dda09 JA |
1436 | if ((WIFSTOPPED (show->status) == 0) && |
1437 | (WIFCONTINUED (show->status) == 0) && | |
1438 | WIFCORED (show->status)) | |
726f6388 JA |
1439 | fprintf (stream, "(core dumped) "); |
1440 | } | |
1441 | } | |
1442 | ||
1443 | if (p != first && format) | |
1444 | fprintf (stream, "| "); | |
1445 | ||
1446 | if (p->command) | |
1447 | fprintf (stream, "%s", p->command); | |
1448 | ||
ccc6cda3 | 1449 | if (p == last && job_index >= 0) |
726f6388 | 1450 | { |
ccc6cda3 | 1451 | temp = current_working_directory (); |
726f6388 | 1452 | |
ccc6cda3 | 1453 | if (RUNNING (job_index) && (IS_FOREGROUND (job_index) == 0)) |
726f6388 JA |
1454 | fprintf (stream, " &"); |
1455 | ||
ccc6cda3 | 1456 | if (strcmp (temp, jobs[job_index]->wd) != 0) |
726f6388 | 1457 | fprintf (stream, |
ccc6cda3 | 1458 | " (wd: %s)", polite_directory_format (jobs[job_index]->wd)); |
726f6388 JA |
1459 | } |
1460 | ||
1461 | if (format || (p == last)) | |
cce855bc JA |
1462 | { |
1463 | /* We need to add a CR only if this is an interactive shell, and | |
1464 | we're reporting the status of a completed job asynchronously. | |
1465 | We can't really check whether this particular job is being | |
1466 | reported asynchronously, so just add the CR if the shell is | |
1467 | currently interactive and asynchronous notification is enabled. */ | |
1468 | if (asynchronous_notification && interactive) | |
1469 | fprintf (stream, "\r\n"); | |
1470 | else | |
1471 | fprintf (stream, "\n"); | |
1472 | } | |
726f6388 JA |
1473 | |
1474 | if (p == last) | |
1475 | break; | |
1476 | p = p->next; | |
1477 | } | |
726f6388 | 1478 | fflush (stream); |
ccc6cda3 JA |
1479 | } |
1480 | ||
7117c2d2 JA |
1481 | /* Print information to STREAM about jobs[JOB_INDEX] according to FORMAT. |
1482 | Must be called with SIGCHLD blocked or queued with queue_sigchld */ | |
ccc6cda3 JA |
1483 | static void |
1484 | pretty_print_job (job_index, format, stream) | |
1485 | int job_index, format; | |
1486 | FILE *stream; | |
1487 | { | |
1488 | register PROCESS *p; | |
ccc6cda3 JA |
1489 | |
1490 | /* Format only pid information about the process group leader? */ | |
1491 | if (format == JLIST_PID_ONLY) | |
1492 | { | |
f73dda09 | 1493 | fprintf (stream, "%ld\n", (long)jobs[job_index]->pipe->pid); |
ccc6cda3 JA |
1494 | return; |
1495 | } | |
1496 | ||
1497 | if (format == JLIST_CHANGED_ONLY) | |
1498 | { | |
1499 | if (IS_NOTIFIED (job_index)) | |
7117c2d2 | 1500 | return; |
ccc6cda3 JA |
1501 | format = JLIST_STANDARD; |
1502 | } | |
1503 | ||
1504 | if (format != JLIST_NONINTERACTIVE) | |
1505 | fprintf (stream, "[%d]%c ", job_index + 1, | |
95732b49 JA |
1506 | (job_index == js.j_current) ? '+': |
1507 | (job_index == js.j_previous) ? '-' : ' '); | |
ccc6cda3 JA |
1508 | |
1509 | if (format == JLIST_NONINTERACTIVE) | |
1510 | format = JLIST_LONG; | |
1511 | ||
1512 | p = jobs[job_index]->pipe; | |
1513 | ||
cce855bc JA |
1514 | print_pipeline (p, job_index, format, stream); |
1515 | ||
ccc6cda3 JA |
1516 | /* We have printed information about this job. When the job's |
1517 | status changes, waitchld () sets the notification flag to 0. */ | |
1518 | jobs[job_index]->flags |= J_NOTIFIED; | |
726f6388 JA |
1519 | } |
1520 | ||
ccc6cda3 JA |
1521 | static int |
1522 | print_job (job, format, state, job_index) | |
1523 | JOB *job; | |
1524 | int format, state, job_index; | |
1525 | { | |
1526 | if (state == -1 || (JOB_STATE)state == job->state) | |
1527 | pretty_print_job (job_index, format, stdout); | |
1528 | return (0); | |
1529 | } | |
1530 | ||
1531 | void | |
726f6388 JA |
1532 | list_one_job (job, format, ignore, job_index) |
1533 | JOB *job; | |
1534 | int format, ignore, job_index; | |
1535 | { | |
7117c2d2 | 1536 | pretty_print_job (job_index, format, stdout); |
ccc6cda3 JA |
1537 | } |
1538 | ||
1539 | void | |
1540 | list_stopped_jobs (format) | |
1541 | int format; | |
1542 | { | |
1543 | cleanup_dead_jobs (); | |
1544 | map_over_jobs (print_job, format, (int)JSTOPPED); | |
1545 | } | |
1546 | ||
1547 | void | |
1548 | list_running_jobs (format) | |
1549 | int format; | |
1550 | { | |
1551 | cleanup_dead_jobs (); | |
1552 | map_over_jobs (print_job, format, (int)JRUNNING); | |
726f6388 JA |
1553 | } |
1554 | ||
1555 | /* List jobs. If FORMAT is non-zero, then the long form of the information | |
1556 | is printed, else just a short version. */ | |
1557 | void | |
ccc6cda3 | 1558 | list_all_jobs (format) |
726f6388 JA |
1559 | int format; |
1560 | { | |
1561 | cleanup_dead_jobs (); | |
ccc6cda3 | 1562 | map_over_jobs (print_job, format, -1); |
726f6388 JA |
1563 | } |
1564 | ||
1565 | /* Fork, handling errors. Returns the pid of the newly made child, or 0. | |
1566 | COMMAND is just for remembering the name of the command; we don't do | |
1567 | anything else with it. ASYNC_P says what to do with the tty. If | |
1568 | non-zero, then don't give it away. */ | |
1569 | pid_t | |
1570 | make_child (command, async_p) | |
1571 | char *command; | |
1572 | int async_p; | |
1573 | { | |
1574 | sigset_t set, oset; | |
1575 | pid_t pid; | |
1576 | ||
1577 | sigemptyset (&set); | |
1578 | sigaddset (&set, SIGCHLD); | |
1579 | sigaddset (&set, SIGINT); | |
1580 | sigemptyset (&oset); | |
1581 | sigprocmask (SIG_BLOCK, &set, &oset); | |
1582 | ||
1583 | making_children (); | |
1584 | ||
1585 | #if defined (BUFFERED_INPUT) | |
1586 | /* If default_buffered_input is active, we are reading a script. If | |
1587 | the command is asynchronous, we have already duplicated /dev/null | |
1588 | as fd 0, but have not changed the buffered stream corresponding to | |
1589 | the old fd 0. We don't want to sync the stream in this case. */ | |
1590 | if (default_buffered_input != -1 && | |
1591 | (!async_p || default_buffered_input > 0)) | |
1592 | sync_buffered_stream (default_buffered_input); | |
1593 | #endif /* BUFFERED_INPUT */ | |
1594 | ||
1595 | /* Create the child, handle severe errors. */ | |
1596 | if ((pid = fork ()) < 0) | |
1597 | { | |
ccc6cda3 | 1598 | sys_error ("fork"); |
726f6388 JA |
1599 | |
1600 | /* Kill all of the processes in the current pipeline. */ | |
1601 | terminate_current_pipeline (); | |
1602 | ||
1603 | /* Discard the current pipeline, if any. */ | |
1604 | if (the_pipeline) | |
1605 | kill_current_pipeline (); | |
1606 | ||
1607 | throw_to_top_level (); /* Reset signals, etc. */ | |
1608 | } | |
1609 | ||
1610 | if (pid == 0) | |
1611 | { | |
1612 | /* In the child. Give this child the right process group, set the | |
1613 | signals to the default state for a new process. */ | |
b72432fd | 1614 | pid_t mypid; |
726f6388 | 1615 | |
b72432fd | 1616 | mypid = getpid (); |
726f6388 JA |
1617 | #if defined (BUFFERED_INPUT) |
1618 | /* Close default_buffered_input if it's > 0. We don't close it if it's | |
1619 | 0 because that's the file descriptor used when redirecting input, | |
1620 | and it's wrong to close the file in that case. */ | |
cce855bc | 1621 | unset_bash_input (0); |
726f6388 JA |
1622 | #endif /* BUFFERED_INPUT */ |
1623 | ||
1624 | /* Restore top-level signal mask. */ | |
1625 | sigprocmask (SIG_SETMASK, &top_level_mask, (sigset_t *)NULL); | |
1626 | ||
1627 | if (job_control) | |
1628 | { | |
1629 | /* All processes in this pipeline belong in the same | |
1630 | process group. */ | |
1631 | ||
ccc6cda3 | 1632 | if (pipeline_pgrp == 0) /* This is the first child. */ |
b72432fd | 1633 | pipeline_pgrp = mypid; |
726f6388 JA |
1634 | |
1635 | /* Check for running command in backquotes. */ | |
1636 | if (pipeline_pgrp == shell_pgrp) | |
ccc6cda3 | 1637 | ignore_tty_job_signals (); |
726f6388 | 1638 | else |
ccc6cda3 | 1639 | default_tty_job_signals (); |
726f6388 JA |
1640 | |
1641 | /* Set the process group before trying to mess with the terminal's | |
1642 | process group. This is mandated by POSIX. */ | |
1643 | /* This is in accordance with the Posix 1003.1 standard, | |
1644 | section B.7.2.4, which says that trying to set the terminal | |
1645 | process group with tcsetpgrp() to an unused pgrp value (like | |
1646 | this would have for the first child) is an error. Section | |
1647 | B.4.3.3, p. 237 also covers this, in the context of job control | |
1648 | shells. */ | |
b72432fd | 1649 | if (setpgid (mypid, pipeline_pgrp) < 0) |
f73dda09 | 1650 | sys_error ("child setpgid (%ld to %ld)", (long)mypid, (long)pipeline_pgrp); |
b80f6443 JA |
1651 | |
1652 | /* By convention (and assumption above), if | |
1653 | pipeline_pgrp == shell_pgrp, we are making a child for | |
1654 | command substitution. | |
1655 | In this case, we don't want to give the terminal to the | |
1656 | shell's process group (we could be in the middle of a | |
1657 | pipeline, for example). */ | |
1658 | if (async_p == 0 && pipeline_pgrp != shell_pgrp) | |
1659 | give_terminal_to (pipeline_pgrp, 0); | |
726f6388 JA |
1660 | |
1661 | #if defined (PGRP_PIPE) | |
b80f6443 JA |
1662 | if (pipeline_pgrp == mypid) |
1663 | pipe_read (pgrp_pipe); | |
726f6388 JA |
1664 | #endif |
1665 | } | |
1666 | else /* Without job control... */ | |
1667 | { | |
ccc6cda3 | 1668 | if (pipeline_pgrp == 0) |
726f6388 JA |
1669 | pipeline_pgrp = shell_pgrp; |
1670 | ||
1671 | /* If these signals are set to SIG_DFL, we encounter the curious | |
1672 | situation of an interactive ^Z to a running process *working* | |
1673 | and stopping the process, but being unable to do anything with | |
1674 | that process to change its state. On the other hand, if they | |
1675 | are set to SIG_IGN, jobs started from scripts do not stop when | |
1676 | the shell running the script gets a SIGTSTP and stops. */ | |
1677 | ||
ccc6cda3 | 1678 | default_tty_job_signals (); |
726f6388 JA |
1679 | } |
1680 | ||
1681 | #if defined (PGRP_PIPE) | |
1682 | /* Release the process group pipe, since our call to setpgid () | |
1683 | is done. The last call to pipe_close is done in stop_pipeline. */ | |
1684 | pipe_close (pgrp_pipe); | |
1685 | #endif /* PGRP_PIPE */ | |
1686 | ||
1687 | if (async_p) | |
95732b49 JA |
1688 | last_asynchronous_pid = mypid; |
1689 | #if defined (RECYCLES_PIDS) | |
1690 | else if (last_asynchronous_pid == mypid) | |
1691 | /* Avoid pid aliasing. 1 seems like a safe, unusual pid value. */ | |
1692 | last_asynchronous_pid = 1; | |
1693 | #endif | |
726f6388 JA |
1694 | } |
1695 | else | |
1696 | { | |
1697 | /* In the parent. Remember the pid of the child just created | |
1698 | as the proper pgrp if this is the first child. */ | |
1699 | ||
1700 | if (job_control) | |
1701 | { | |
ccc6cda3 | 1702 | if (pipeline_pgrp == 0) |
726f6388 JA |
1703 | { |
1704 | pipeline_pgrp = pid; | |
1705 | /* Don't twiddle terminal pgrps in the parent! This is the bug, | |
1706 | not the good thing of twiddling them in the child! */ | |
28ef6c31 | 1707 | /* give_terminal_to (pipeline_pgrp, 0); */ |
726f6388 JA |
1708 | } |
1709 | /* This is done on the recommendation of the Rationale section of | |
1710 | the POSIX 1003.1 standard, where it discusses job control and | |
1711 | shells. It is done to avoid possible race conditions. (Ref. | |
1712 | 1003.1 Rationale, section B.4.3.3, page 236). */ | |
1713 | setpgid (pid, pipeline_pgrp); | |
1714 | } | |
1715 | else | |
1716 | { | |
ccc6cda3 | 1717 | if (pipeline_pgrp == 0) |
726f6388 JA |
1718 | pipeline_pgrp = shell_pgrp; |
1719 | } | |
1720 | ||
1721 | /* Place all processes into the jobs array regardless of the | |
1722 | state of job_control. */ | |
1723 | add_process (command, pid); | |
1724 | ||
1725 | if (async_p) | |
1726 | last_asynchronous_pid = pid; | |
95732b49 JA |
1727 | #if defined (RECYCLES_PIDS) |
1728 | else if (last_asynchronous_pid == pid) | |
1729 | /* Avoid pid aliasing. 1 seems like a safe, unusual pid value. */ | |
1730 | last_asynchronous_pid = 1; | |
1731 | #endif | |
1732 | ||
1733 | #if !defined (RECYCLES_PIDS) | |
1734 | /* Only check for saved status if we've saved more than CHILD_MAX | |
1735 | statuses, unless the system recycles pids. */ | |
1736 | if ((js.c_reaped + bgpids.npid) >= js.c_childmax) | |
1737 | #endif | |
1738 | bgp_delete (pid); /* new process, discard any saved status */ | |
726f6388 JA |
1739 | |
1740 | last_made_pid = pid; | |
1741 | ||
95732b49 JA |
1742 | /* keep stats */ |
1743 | js.c_totforked++; | |
1744 | js.c_living++; | |
1745 | ||
1746 | /* Unblock SIGINT and SIGCHLD unless creating a pipeline, in which case | |
1747 | SIGCHLD remains blocked until all commands in the pipeline have been | |
1748 | created. */ | |
726f6388 JA |
1749 | sigprocmask (SIG_SETMASK, &oset, (sigset_t *)NULL); |
1750 | } | |
1751 | ||
1752 | return (pid); | |
1753 | } | |
1754 | ||
7117c2d2 | 1755 | /* These two functions are called only in child processes. */ |
ccc6cda3 JA |
1756 | void |
1757 | ignore_tty_job_signals () | |
1758 | { | |
1759 | set_signal_handler (SIGTSTP, SIG_IGN); | |
1760 | set_signal_handler (SIGTTIN, SIG_IGN); | |
1761 | set_signal_handler (SIGTTOU, SIG_IGN); | |
1762 | } | |
1763 | ||
1764 | void | |
1765 | default_tty_job_signals () | |
1766 | { | |
1767 | set_signal_handler (SIGTSTP, SIG_DFL); | |
1768 | set_signal_handler (SIGTTIN, SIG_DFL); | |
1769 | set_signal_handler (SIGTTOU, SIG_DFL); | |
1770 | } | |
1771 | ||
726f6388 JA |
1772 | /* When we end a job abnormally, or if we stop a job, we set the tty to the |
1773 | state kept in here. When a job ends normally, we set the state in here | |
1774 | to the state of the tty. */ | |
1775 | ||
28ef6c31 JA |
1776 | static TTYSTRUCT shell_tty_info; |
1777 | ||
726f6388 | 1778 | #if defined (NEW_TTY_DRIVER) |
726f6388 JA |
1779 | static struct tchars shell_tchars; |
1780 | static struct ltchars shell_ltchars; | |
1781 | #endif /* NEW_TTY_DRIVER */ | |
1782 | ||
726f6388 JA |
1783 | #if defined (NEW_TTY_DRIVER) && defined (DRAIN_OUTPUT) |
1784 | /* Since the BSD tty driver does not allow us to change the tty modes | |
1785 | while simultaneously waiting for output to drain and preserving | |
1786 | typeahead, we have to drain the output ourselves before calling | |
1787 | ioctl. We cheat by finding the length of the output queue, and | |
1788 | using select to wait for an appropriate length of time. This is | |
1789 | a hack, and should be labeled as such (it's a hastily-adapted | |
1790 | mutation of a `usleep' implementation). It's only reason for | |
1791 | existing is the flaw in the BSD tty driver. */ | |
1792 | ||
1793 | static int ttspeeds[] = | |
1794 | { | |
1795 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, | |
1796 | 1800, 2400, 4800, 9600, 19200, 38400 | |
1797 | }; | |
1798 | ||
1799 | static void | |
1800 | draino (fd, ospeed) | |
1801 | int fd, ospeed; | |
1802 | { | |
1803 | register int delay = ttspeeds[ospeed]; | |
1804 | int n; | |
1805 | ||
1806 | if (!delay) | |
1807 | return; | |
1808 | ||
1809 | while ((ioctl (fd, TIOCOUTQ, &n) == 0) && n) | |
1810 | { | |
1811 | if (n > (delay / 100)) | |
1812 | { | |
1813 | struct timeval tv; | |
1814 | ||
1815 | n *= 10; /* 2 bits more for conservativeness. */ | |
1816 | tv.tv_sec = n / delay; | |
1817 | tv.tv_usec = ((n % delay) * 1000000) / delay; | |
1818 | select (fd, (fd_set *)0, (fd_set *)0, (fd_set *)0, &tv); | |
1819 | } | |
1820 | else | |
1821 | break; | |
1822 | } | |
1823 | } | |
1824 | #endif /* NEW_TTY_DRIVER && DRAIN_OUTPUT */ | |
1825 | ||
1826 | /* Return the fd from which we are actually getting input. */ | |
1827 | #define input_tty() (shell_tty != -1) ? shell_tty : fileno (stderr) | |
1828 | ||
1829 | /* Fill the contents of shell_tty_info with the current tty info. */ | |
ccc6cda3 | 1830 | int |
726f6388 JA |
1831 | get_tty_state () |
1832 | { | |
ccc6cda3 | 1833 | int tty; |
726f6388 | 1834 | |
ccc6cda3 | 1835 | tty = input_tty (); |
726f6388 JA |
1836 | if (tty != -1) |
1837 | { | |
1838 | #if defined (NEW_TTY_DRIVER) | |
1839 | ioctl (tty, TIOCGETP, &shell_tty_info); | |
1840 | ioctl (tty, TIOCGETC, &shell_tchars); | |
1841 | ioctl (tty, TIOCGLTC, &shell_ltchars); | |
1842 | #endif /* NEW_TTY_DRIVER */ | |
1843 | ||
1844 | #if defined (TERMIO_TTY_DRIVER) | |
1845 | ioctl (tty, TCGETA, &shell_tty_info); | |
1846 | #endif /* TERMIO_TTY_DRIVER */ | |
1847 | ||
1848 | #if defined (TERMIOS_TTY_DRIVER) | |
1849 | if (tcgetattr (tty, &shell_tty_info) < 0) | |
1850 | { | |
1851 | #if 0 | |
1852 | /* Only print an error message if we're really interactive at | |
1853 | this time. */ | |
1854 | if (interactive) | |
f73dda09 | 1855 | sys_error ("[%ld: %d] tcgetattr", (long)getpid (), shell_level); |
726f6388 JA |
1856 | #endif |
1857 | return -1; | |
1858 | } | |
1859 | #endif /* TERMIOS_TTY_DRIVER */ | |
ccc6cda3 | 1860 | if (check_window_size) |
95732b49 | 1861 | get_new_window_size (0, (int *)0, (int *)0); |
726f6388 JA |
1862 | } |
1863 | return 0; | |
1864 | } | |
1865 | ||
1866 | /* Make the current tty use the state in shell_tty_info. */ | |
ccc6cda3 | 1867 | int |
726f6388 JA |
1868 | set_tty_state () |
1869 | { | |
d166f048 | 1870 | int tty; |
726f6388 | 1871 | |
d166f048 | 1872 | tty = input_tty (); |
726f6388 JA |
1873 | if (tty != -1) |
1874 | { | |
1875 | #if defined (NEW_TTY_DRIVER) | |
1876 | # if defined (DRAIN_OUTPUT) | |
1877 | draino (tty, shell_tty_info.sg_ospeed); | |
1878 | # endif /* DRAIN_OUTPUT */ | |
1879 | ioctl (tty, TIOCSETN, &shell_tty_info); | |
1880 | ioctl (tty, TIOCSETC, &shell_tchars); | |
1881 | ioctl (tty, TIOCSLTC, &shell_ltchars); | |
1882 | #endif /* NEW_TTY_DRIVER */ | |
1883 | ||
1884 | #if defined (TERMIO_TTY_DRIVER) | |
1885 | ioctl (tty, TCSETAW, &shell_tty_info); | |
1886 | #endif /* TERMIO_TTY_DRIVER */ | |
1887 | ||
1888 | #if defined (TERMIOS_TTY_DRIVER) | |
1889 | if (tcsetattr (tty, TCSADRAIN, &shell_tty_info) < 0) | |
1890 | { | |
1891 | /* Only print an error message if we're really interactive at | |
1892 | this time. */ | |
1893 | if (interactive) | |
f73dda09 | 1894 | sys_error ("[%ld: %d] tcsetattr", (long)getpid (), shell_level); |
726f6388 JA |
1895 | return -1; |
1896 | } | |
1897 | #endif /* TERMIOS_TTY_DRIVER */ | |
1898 | } | |
1899 | return 0; | |
1900 | } | |
1901 | ||
95732b49 | 1902 | /* Given an index into the jobs array JOB, return the PROCESS struct of the last |
726f6388 | 1903 | process in that job's pipeline. This is the one whose exit status |
7117c2d2 | 1904 | counts. Must be called with SIGCHLD blocked or queued. */ |
95732b49 JA |
1905 | static PROCESS * |
1906 | find_last_proc (job, block) | |
726f6388 | 1907 | int job; |
7117c2d2 | 1908 | int block; |
726f6388 JA |
1909 | { |
1910 | register PROCESS *p; | |
7117c2d2 JA |
1911 | sigset_t set, oset; |
1912 | ||
1913 | if (block) | |
1914 | BLOCK_CHILD (set, oset); | |
726f6388 JA |
1915 | |
1916 | p = jobs[job]->pipe; | |
1917 | while (p->next != jobs[job]->pipe) | |
1918 | p = p->next; | |
1919 | ||
7117c2d2 JA |
1920 | if (block) |
1921 | UNBLOCK_CHILD (oset); | |
cce855bc | 1922 | |
95732b49 | 1923 | return (p); |
cce855bc JA |
1924 | } |
1925 | ||
95732b49 JA |
1926 | static pid_t |
1927 | find_last_pid (job, block) | |
1928 | int job; | |
1929 | int block; | |
1930 | { | |
1931 | PROCESS *p; | |
1932 | ||
1933 | p = find_last_proc (job, block); | |
1934 | /* Possible race condition here. */ | |
1935 | return p->pid; | |
1936 | } | |
1937 | ||
726f6388 JA |
1938 | /* Wait for a particular child of the shell to finish executing. |
1939 | This low-level function prints an error message if PID is not | |
7117c2d2 JA |
1940 | a child of this shell. It returns -1 if it fails, or whatever |
1941 | wait_for returns otherwise. If the child is not found in the | |
bb70624e | 1942 | jobs table, it returns 127. */ |
726f6388 JA |
1943 | int |
1944 | wait_for_single_pid (pid) | |
1945 | pid_t pid; | |
1946 | { | |
1947 | register PROCESS *child; | |
ccc6cda3 | 1948 | sigset_t set, oset; |
cce855bc | 1949 | int r, job; |
726f6388 | 1950 | |
ccc6cda3 | 1951 | BLOCK_CHILD (set, oset); |
7117c2d2 | 1952 | child = find_pipeline (pid, 0, (int *)NULL); |
ccc6cda3 | 1953 | UNBLOCK_CHILD (oset); |
726f6388 | 1954 | |
95732b49 JA |
1955 | if (child == 0) |
1956 | { | |
1957 | r = bgp_search (pid); | |
1958 | if (r >= 0) | |
1959 | return r; | |
1960 | } | |
1961 | ||
ccc6cda3 | 1962 | if (child == 0) |
726f6388 | 1963 | { |
b80f6443 | 1964 | internal_error (_("wait: pid %ld is not a child of this shell"), (long)pid); |
726f6388 JA |
1965 | return (127); |
1966 | } | |
1967 | ||
cce855bc JA |
1968 | r = wait_for (pid); |
1969 | ||
b72432fd JA |
1970 | /* POSIX.2: if we just waited for a job, we can remove it from the jobs |
1971 | table. */ | |
1972 | BLOCK_CHILD (set, oset); | |
95732b49 | 1973 | job = find_job (pid, 0, NULL); |
b72432fd JA |
1974 | if (job != NO_JOB && jobs[job] && DEADJOB (job)) |
1975 | jobs[job]->flags |= J_NOTIFIED; | |
1976 | UNBLOCK_CHILD (oset); | |
cce855bc | 1977 | |
95732b49 JA |
1978 | /* If running in posix mode, remove the job from the jobs table immediately */ |
1979 | if (posixly_correct) | |
1980 | { | |
1981 | cleanup_dead_jobs (); | |
1982 | bgp_delete (pid); | |
1983 | } | |
1984 | ||
cce855bc | 1985 | return r; |
726f6388 JA |
1986 | } |
1987 | ||
1988 | /* Wait for all of the backgrounds of this shell to finish. */ | |
1989 | void | |
1990 | wait_for_background_pids () | |
1991 | { | |
7117c2d2 | 1992 | register int i, r, waited_for; |
ccc6cda3 JA |
1993 | sigset_t set, oset; |
1994 | pid_t pid; | |
726f6388 | 1995 | |
bb70624e | 1996 | for (waited_for = 0;;) |
ccc6cda3 | 1997 | { |
726f6388 JA |
1998 | BLOCK_CHILD (set, oset); |
1999 | ||
7117c2d2 | 2000 | /* find first running job; if none running in foreground, break */ |
95732b49 JA |
2001 | /* XXX could use js.j_firstj here */ |
2002 | for (i = 0; i < js.j_jobslots; i++) | |
2003 | { | |
2004 | #if defined (DEBUG) | |
2005 | if (i < js.j_firstj && jobs[i]) | |
2006 | itrace("wait_for_background_pids: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
2007 | #endif | |
2008 | if (jobs[i] && RUNNING (i) && IS_FOREGROUND (i) == 0) | |
2009 | break; | |
2010 | } | |
2011 | if (i == js.j_jobslots) | |
726f6388 JA |
2012 | { |
2013 | UNBLOCK_CHILD (oset); | |
2014 | break; | |
2015 | } | |
2016 | ||
7117c2d2 JA |
2017 | /* now wait for the last pid in that job. */ |
2018 | pid = find_last_pid (i, 0); | |
2019 | UNBLOCK_CHILD (oset); | |
2020 | QUIT; | |
2021 | errno = 0; /* XXX */ | |
2022 | r = wait_for_single_pid (pid); | |
2023 | if (r == -1) | |
2024 | { | |
2025 | /* If we're mistaken about job state, compensate. */ | |
2026 | if (errno == ECHILD) | |
2027 | mark_all_jobs_as_dead (); | |
2028 | } | |
2029 | else | |
2030 | waited_for++; | |
726f6388 | 2031 | } |
b72432fd JA |
2032 | |
2033 | /* POSIX.2 says the shell can discard the statuses of all completed jobs if | |
2034 | `wait' is called with no arguments. */ | |
2035 | mark_dead_jobs_as_notified (1); | |
2036 | cleanup_dead_jobs (); | |
95732b49 | 2037 | bgp_clear (); |
726f6388 JA |
2038 | } |
2039 | ||
2040 | /* Make OLD_SIGINT_HANDLER the SIGINT signal handler. */ | |
2041 | #define INVALID_SIGNAL_HANDLER (SigHandler *)wait_for_background_pids | |
2042 | static SigHandler *old_sigint_handler = INVALID_SIGNAL_HANDLER; | |
2043 | ||
2044 | static void | |
2045 | restore_sigint_handler () | |
2046 | { | |
2047 | if (old_sigint_handler != INVALID_SIGNAL_HANDLER) | |
2048 | { | |
2049 | set_signal_handler (SIGINT, old_sigint_handler); | |
2050 | old_sigint_handler = INVALID_SIGNAL_HANDLER; | |
2051 | } | |
2052 | } | |
2053 | ||
ccc6cda3 | 2054 | static int wait_sigint_received; |
726f6388 JA |
2055 | |
2056 | /* Handle SIGINT while we are waiting for children in a script to exit. | |
2057 | The `wait' builtin should be interruptible, but all others should be | |
2058 | effectively ignored (i.e. not cause the shell to exit). */ | |
2059 | static sighandler | |
2060 | wait_sigint_handler (sig) | |
2061 | int sig; | |
2062 | { | |
bb70624e JA |
2063 | SigHandler *sigint_handler; |
2064 | ||
726f6388 JA |
2065 | if (interrupt_immediately || |
2066 | (this_shell_builtin && this_shell_builtin == wait_builtin)) | |
2067 | { | |
2068 | last_command_exit_value = EXECUTION_FAILURE; | |
2069 | restore_sigint_handler (); | |
bb70624e | 2070 | /* If we got a SIGINT while in `wait', and SIGINT is trapped, do |
28ef6c31 | 2071 | what POSIX.2 says (see builtins/wait.def for more info). */ |
bb70624e JA |
2072 | if (this_shell_builtin && this_shell_builtin == wait_builtin && |
2073 | signal_is_trapped (SIGINT) && | |
2074 | ((sigint_handler = trap_to_sighandler (SIGINT)) == trap_handler)) | |
2075 | { | |
2076 | interrupt_immediately = 0; | |
2077 | trap_handler (SIGINT); /* set pending_traps[SIGINT] */ | |
7117c2d2 | 2078 | wait_signal_received = SIGINT; |
bb70624e JA |
2079 | longjmp (wait_intr_buf, 1); |
2080 | } | |
2081 | ||
ccc6cda3 | 2082 | ADDINTERRUPT; |
726f6388 JA |
2083 | QUIT; |
2084 | } | |
2085 | ||
ccc6cda3 JA |
2086 | /* XXX - should this be interrupt_state? If it is, the shell will act |
2087 | as if it got the SIGINT interrupt. */ | |
2088 | wait_sigint_received = 1; | |
2089 | ||
726f6388 JA |
2090 | /* Otherwise effectively ignore the SIGINT and allow the running job to |
2091 | be killed. */ | |
ccc6cda3 | 2092 | SIGRETURN (0); |
726f6388 JA |
2093 | } |
2094 | ||
b80f6443 JA |
2095 | static int |
2096 | process_exit_signal (status) | |
2097 | WAIT status; | |
2098 | { | |
2099 | return (WIFSIGNALED (status) ? WTERMSIG (status) : 0); | |
2100 | } | |
2101 | ||
726f6388 JA |
2102 | static int |
2103 | process_exit_status (status) | |
2104 | WAIT status; | |
2105 | { | |
2106 | if (WIFSIGNALED (status)) | |
2107 | return (128 + WTERMSIG (status)); | |
ccc6cda3 | 2108 | else if (WIFSTOPPED (status) == 0) |
726f6388 JA |
2109 | return (WEXITSTATUS (status)); |
2110 | else | |
2111 | return (EXECUTION_SUCCESS); | |
2112 | } | |
2113 | ||
28ef6c31 JA |
2114 | /* Return the exit status of the last process in the pipeline for job JOB. |
2115 | This is the exit status of the entire job. */ | |
2116 | static WAIT | |
bb70624e | 2117 | raw_job_exit_status (job) |
f73dda09 | 2118 | int job; |
ccc6cda3 JA |
2119 | { |
2120 | register PROCESS *p; | |
b80f6443 JA |
2121 | int fail; |
2122 | ||
2123 | if (pipefail_opt) | |
2124 | { | |
2125 | fail = 0; | |
eb873671 JA |
2126 | p = jobs[job]->pipe; |
2127 | do | |
2128 | { | |
2129 | if (p->status != EXECUTION_SUCCESS) fail = p->status; | |
2130 | p = p->next; | |
2131 | } | |
2132 | while (p != jobs[job]->pipe); | |
b80f6443 JA |
2133 | return fail; |
2134 | } | |
2135 | ||
ccc6cda3 JA |
2136 | for (p = jobs[job]->pipe; p->next != jobs[job]->pipe; p = p->next) |
2137 | ; | |
bb70624e JA |
2138 | return (p->status); |
2139 | } | |
2140 | ||
28ef6c31 JA |
2141 | /* Return the exit status of job JOB. This is the exit status of the last |
2142 | (rightmost) process in the job's pipeline, modified if the job was killed | |
2143 | by a signal or stopped. */ | |
f73dda09 | 2144 | static int |
bb70624e JA |
2145 | job_exit_status (job) |
2146 | int job; | |
2147 | { | |
2148 | return (process_exit_status (raw_job_exit_status (job))); | |
ccc6cda3 JA |
2149 | } |
2150 | ||
b80f6443 JA |
2151 | static int |
2152 | job_exit_signal (job) | |
2153 | int job; | |
2154 | { | |
2155 | return (process_exit_signal (raw_job_exit_status (job))); | |
2156 | } | |
2157 | ||
ccc6cda3 JA |
2158 | #define FIND_CHILD(pid, child) \ |
2159 | do \ | |
2160 | { \ | |
7117c2d2 | 2161 | child = find_pipeline (pid, 0, (int *)NULL); \ |
ccc6cda3 JA |
2162 | if (child == 0) \ |
2163 | { \ | |
28ef6c31 | 2164 | give_terminal_to (shell_pgrp, 0); \ |
ccc6cda3 | 2165 | UNBLOCK_CHILD (oset); \ |
b80f6443 | 2166 | internal_error (_("wait_for: No record of process %ld"), (long)pid); \ |
ccc6cda3 JA |
2167 | restore_sigint_handler (); \ |
2168 | return (termination_state = 127); \ | |
2169 | } \ | |
2170 | } \ | |
2171 | while (0) | |
2172 | ||
bb70624e JA |
2173 | /* Wait for pid (one of our children) to terminate, then |
2174 | return the termination state. Returns 127 if PID is not found in | |
2175 | the jobs table. Returns -1 if waitchld() returns -1, indicating | |
2176 | that there are no unwaited-for child processes. */ | |
726f6388 JA |
2177 | int |
2178 | wait_for (pid) | |
2179 | pid_t pid; | |
2180 | { | |
28ef6c31 JA |
2181 | int job, termination_state, r; |
2182 | WAIT s; | |
726f6388 JA |
2183 | register PROCESS *child; |
2184 | sigset_t set, oset; | |
ccc6cda3 | 2185 | register PROCESS *p; |
726f6388 JA |
2186 | |
2187 | /* In the case that this code is interrupted, and we longjmp () out of it, | |
2188 | we are relying on the code in throw_to_top_level () to restore the | |
2189 | top-level signal mask. */ | |
2190 | BLOCK_CHILD (set, oset); | |
2191 | ||
2192 | /* Ignore interrupts while waiting for a job run without job control | |
2193 | to finish. We don't want the shell to exit if an interrupt is | |
2194 | received, only if one of the jobs run is killed via SIGINT. If | |
ccc6cda3 | 2195 | job control is not set, the job will be run in the same pgrp as |
726f6388 JA |
2196 | the shell, and the shell will see any signals the job gets. */ |
2197 | ||
2198 | /* This is possibly a race condition -- should it go in stop_pipeline? */ | |
2199 | wait_sigint_received = 0; | |
ccc6cda3 | 2200 | if (job_control == 0) |
726f6388 JA |
2201 | old_sigint_handler = set_signal_handler (SIGINT, wait_sigint_handler); |
2202 | ||
2203 | termination_state = last_command_exit_value; | |
2204 | ||
ccc6cda3 | 2205 | if (interactive && job_control == 0) |
726f6388 JA |
2206 | QUIT; |
2207 | ||
ccc6cda3 JA |
2208 | /* If we say wait_for (), then we have a record of this child somewhere. |
2209 | If it and none of its peers are running, don't call waitchld(). */ | |
726f6388 | 2210 | |
ccc6cda3 JA |
2211 | job = NO_JOB; |
2212 | do | |
726f6388 | 2213 | { |
ccc6cda3 | 2214 | FIND_CHILD (pid, child); |
726f6388 | 2215 | |
ccc6cda3 | 2216 | /* If this child is part of a job, then we are really waiting for the |
28ef6c31 JA |
2217 | job to finish. Otherwise, we are waiting for the child to finish. |
2218 | We check for JDEAD in case the job state has been set by waitchld | |
2219 | after receipt of a SIGCHLD. */ | |
ccc6cda3 | 2220 | if (job == NO_JOB) |
95732b49 | 2221 | job = find_job (pid, 0, NULL); |
726f6388 | 2222 | |
28ef6c31 JA |
2223 | /* waitchld() takes care of setting the state of the job. If the job |
2224 | has already exited before this is called, sigchld_handler will have | |
2225 | called waitchld and the state will be set to JDEAD. */ | |
726f6388 | 2226 | |
95732b49 | 2227 | if (PRUNNING(child) || (job != NO_JOB && RUNNING (job))) |
ccc6cda3 JA |
2228 | { |
2229 | #if defined (WAITPID_BROKEN) /* SCOv4 */ | |
2230 | sigset_t suspend_set; | |
2231 | sigemptyset (&suspend_set); | |
2232 | sigsuspend (&suspend_set); | |
726f6388 | 2233 | #else /* !WAITPID_BROKEN */ |
ccc6cda3 JA |
2234 | # if defined (MUST_UNBLOCK_CHLD) |
2235 | struct sigaction act, oact; | |
2236 | sigset_t nullset, chldset; | |
2237 | ||
2238 | sigemptyset (&nullset); | |
2239 | sigemptyset (&chldset); | |
2240 | sigprocmask (SIG_SETMASK, &nullset, &chldset); | |
2241 | act.sa_handler = SIG_DFL; | |
2242 | sigemptyset (&act.sa_mask); | |
2243 | sigemptyset (&oact.sa_mask); | |
2244 | act.sa_flags = 0; | |
2245 | sigaction (SIGCHLD, &act, &oact); | |
726f6388 | 2246 | # endif |
7117c2d2 | 2247 | queue_sigchld = 1; |
bb70624e | 2248 | r = waitchld (pid, 1); |
ccc6cda3 JA |
2249 | # if defined (MUST_UNBLOCK_CHLD) |
2250 | sigaction (SIGCHLD, &oact, (struct sigaction *)NULL); | |
2251 | sigprocmask (SIG_SETMASK, &chldset, (sigset_t *)NULL); | |
726f6388 | 2252 | # endif |
7117c2d2 | 2253 | queue_sigchld = 0; |
bb70624e JA |
2254 | if (r == -1 && errno == ECHILD && this_shell_builtin == wait_builtin) |
2255 | { | |
2256 | termination_state = -1; | |
2257 | goto wait_for_return; | |
2258 | } | |
28ef6c31 JA |
2259 | |
2260 | /* If child is marked as running, but waitpid() returns -1/ECHILD, | |
2261 | there is something wrong. Somewhere, wait should have returned | |
2262 | that child's pid. Mark the child as not running and the job, | |
2263 | if it exists, as JDEAD. */ | |
2264 | if (r == -1 && errno == ECHILD) | |
2265 | { | |
7117c2d2 JA |
2266 | child->running = PS_DONE; |
2267 | child->status = 0; /* XXX -- can't find true status */ | |
28ef6c31 | 2268 | if (job != NO_JOB) |
95732b49 JA |
2269 | { |
2270 | jobs[job]->state = JDEAD; | |
2271 | js.c_reaped++; | |
2272 | js.j_ndead++; | |
2273 | } | |
28ef6c31 | 2274 | } |
ccc6cda3 JA |
2275 | #endif /* WAITPID_BROKEN */ |
2276 | } | |
2277 | ||
2278 | /* If the shell is interactive, and job control is disabled, see | |
2279 | if the foreground process has died due to SIGINT and jump out | |
2280 | of the wait loop if it has. waitchld has already restored the | |
2281 | old SIGINT signal handler. */ | |
2282 | if (interactive && job_control == 0) | |
2283 | QUIT; | |
726f6388 | 2284 | } |
95732b49 | 2285 | while (PRUNNING (child) || (job != NO_JOB && RUNNING (job))); |
726f6388 JA |
2286 | |
2287 | /* The exit state of the command is either the termination state of the | |
2288 | child, or the termination state of the job. If a job, the status | |
b80f6443 JA |
2289 | of the last child in the pipeline is the significant one. If the command |
2290 | or job was terminated by a signal, note that value also. */ | |
2291 | termination_state = (job != NO_JOB) ? job_exit_status (job) | |
2292 | : process_exit_status (child->status); | |
2293 | last_command_exit_signal = (job != NO_JOB) ? job_exit_signal (job) | |
2294 | : process_exit_signal (child->status); | |
726f6388 | 2295 | |
95732b49 JA |
2296 | /* XXX */ |
2297 | if ((job != NO_JOB && JOBSTATE (job) == JSTOPPED) || WIFSTOPPED (child->status)) | |
2298 | termination_state = 128 + WSTOPSIG (child->status); | |
2299 | ||
ccc6cda3 | 2300 | if (job == NO_JOB || IS_JOBCONTROL (job)) |
b72432fd JA |
2301 | { |
2302 | /* XXX - under what circumstances is a job not present in the jobs | |
2303 | table (job == NO_JOB)? | |
2304 | 1. command substitution | |
2305 | ||
2306 | In the case of command substitution, at least, it's probably not | |
2307 | the right thing to give the terminal to the shell's process group, | |
2308 | even though there is code in subst.c:command_substitute to work | |
2309 | around it. | |
2310 | ||
2311 | Things that don't: | |
2312 | $PROMPT_COMMAND execution | |
2313 | process substitution | |
2314 | */ | |
2315 | #if 0 | |
2316 | if (job == NO_JOB) | |
f73dda09 | 2317 | itrace("wait_for: job == NO_JOB, giving the terminal to shell_pgrp (%ld)", (long)shell_pgrp); |
b72432fd JA |
2318 | #endif |
2319 | ||
28ef6c31 | 2320 | give_terminal_to (shell_pgrp, 0); |
b72432fd | 2321 | } |
726f6388 JA |
2322 | |
2323 | /* If the command did not exit cleanly, or the job is just | |
2324 | being stopped, then reset the tty state back to what it | |
2325 | was before this command. Reset the tty state and notify | |
2326 | the user of the job termination only if the shell is | |
2327 | interactive. Clean up any dead jobs in either case. */ | |
2328 | if (job != NO_JOB) | |
2329 | { | |
ccc6cda3 | 2330 | if (interactive_shell && subshell_environment == 0) |
726f6388 | 2331 | { |
bb70624e JA |
2332 | /* This used to use `child->status'. That's wrong, however, for |
2333 | pipelines. `child' is the first process in the pipeline. It's | |
2334 | likely that the process we want to check for abnormal termination | |
2335 | or stopping is the last process in the pipeline, especially if | |
2336 | it's long-lived and the first process is short-lived. Since we | |
2337 | know we have a job here, we can check all the processes in this | |
2338 | job's pipeline and see if one of them stopped or terminated due | |
2339 | to a signal. We might want to change this later to just check | |
2340 | the last process in the pipeline. If no process exits due to a | |
2341 | signal, S is left as the status of the last job in the pipeline. */ | |
2342 | p = jobs[job]->pipe; | |
2343 | do | |
2344 | { | |
2345 | s = p->status; | |
2346 | if (WIFSIGNALED(s) || WIFSTOPPED(s)) | |
2347 | break; | |
2348 | p = p->next; | |
2349 | } | |
2350 | while (p != jobs[job]->pipe); | |
2351 | ||
2352 | if (WIFSIGNALED (s) || WIFSTOPPED (s)) | |
e8ce775d JA |
2353 | { |
2354 | set_tty_state (); | |
28ef6c31 | 2355 | |
bb70624e JA |
2356 | /* If the current job was stopped or killed by a signal, and |
2357 | the user has requested it, get a possibly new window size */ | |
95732b49 JA |
2358 | if (check_window_size && (job == js.j_current || IS_FOREGROUND (job))) |
2359 | get_new_window_size (0, (int *)0, (int *)0); | |
e8ce775d | 2360 | } |
726f6388 JA |
2361 | else |
2362 | get_tty_state (); | |
2363 | ||
2364 | /* If job control is enabled, the job was started with job | |
2365 | control, the job was the foreground job, and it was killed | |
2366 | by SIGINT, then print a newline to compensate for the kernel | |
2367 | printing the ^C without a trailing newline. */ | |
ccc6cda3 | 2368 | if (job_control && IS_JOBCONTROL (job) && IS_FOREGROUND (job) && |
bb70624e | 2369 | WIFSIGNALED (s) && WTERMSIG (s) == SIGINT) |
726f6388 | 2370 | { |
ccc6cda3 JA |
2371 | /* If SIGINT is not trapped and the shell is in a for, while, |
2372 | or until loop, act as if the shell received SIGINT as | |
2373 | well, so the loop can be broken. This doesn't call the | |
2374 | SIGINT signal handler; maybe it should. */ | |
2375 | if (signal_is_trapped (SIGINT) == 0 && loop_level) | |
2376 | ADDINTERRUPT; | |
2377 | else | |
726f6388 | 2378 | { |
ccc6cda3 JA |
2379 | putchar ('\n'); |
2380 | fflush (stdout); | |
726f6388 JA |
2381 | } |
2382 | } | |
726f6388 | 2383 | } |
28ef6c31 | 2384 | |
7117c2d2 JA |
2385 | /* Moved here from set_job_status_and_cleanup, which is in the SIGCHLD |
2386 | signal handler path */ | |
2387 | if (DEADJOB (job) && IS_FOREGROUND (job) /*&& subshell_environment == 0*/) | |
2388 | setjstatus (job); | |
2389 | ||
28ef6c31 JA |
2390 | /* If this job is dead, notify the user of the status. If the shell |
2391 | is interactive, this will display a message on the terminal. If | |
2392 | the shell is not interactive, make sure we turn on the notify bit | |
2393 | so we don't get an unwanted message about the job's termination, | |
2394 | and so delete_job really clears the slot in the jobs table. */ | |
2395 | notify_and_cleanup (); | |
726f6388 | 2396 | } |
ccc6cda3 | 2397 | |
bb70624e JA |
2398 | wait_for_return: |
2399 | ||
726f6388 JA |
2400 | UNBLOCK_CHILD (oset); |
2401 | ||
2402 | /* Restore the original SIGINT signal handler before we return. */ | |
2403 | restore_sigint_handler (); | |
2404 | ||
2405 | return (termination_state); | |
2406 | } | |
2407 | ||
bb70624e JA |
2408 | /* Wait for the last process in the pipeline for JOB. Returns whatever |
2409 | wait_for returns: the last process's termination state or -1 if there | |
2410 | are no unwaited-for child processes or an error occurs. */ | |
726f6388 JA |
2411 | int |
2412 | wait_for_job (job) | |
2413 | int job; | |
2414 | { | |
ccc6cda3 | 2415 | pid_t pid; |
cce855bc JA |
2416 | int r; |
2417 | sigset_t set, oset; | |
2418 | ||
2419 | BLOCK_CHILD(set, oset); | |
2420 | if (JOBSTATE (job) == JSTOPPED) | |
b80f6443 | 2421 | internal_warning (_("wait_for_job: job %d is stopped"), job+1); |
ccc6cda3 | 2422 | |
7117c2d2 JA |
2423 | pid = find_last_pid (job, 0); |
2424 | UNBLOCK_CHILD(oset); | |
cce855bc JA |
2425 | r = wait_for (pid); |
2426 | ||
b72432fd JA |
2427 | /* POSIX.2: we can remove the job from the jobs table if we just waited |
2428 | for it. */ | |
2429 | BLOCK_CHILD (set, oset); | |
2430 | if (job != NO_JOB && jobs[job] && DEADJOB (job)) | |
2431 | jobs[job]->flags |= J_NOTIFIED; | |
2432 | UNBLOCK_CHILD (oset); | |
cce855bc JA |
2433 | |
2434 | return r; | |
726f6388 JA |
2435 | } |
2436 | ||
2437 | /* Print info about dead jobs, and then delete them from the list | |
2438 | of known jobs. This does not actually delete jobs when the | |
2439 | shell is not interactive, because the dead jobs are not marked | |
2440 | as notified. */ | |
2441 | void | |
2442 | notify_and_cleanup () | |
2443 | { | |
ccc6cda3 | 2444 | if (jobs_list_frozen) |
726f6388 JA |
2445 | return; |
2446 | ||
28ef6c31 | 2447 | if (interactive || interactive_shell == 0 || sourcelevel) |
726f6388 JA |
2448 | notify_of_job_status (); |
2449 | ||
2450 | cleanup_dead_jobs (); | |
2451 | } | |
2452 | ||
2453 | /* Make dead jobs disappear from the jobs array without notification. | |
2454 | This is used when the shell is not interactive. */ | |
2455 | void | |
2456 | reap_dead_jobs () | |
2457 | { | |
b72432fd | 2458 | mark_dead_jobs_as_notified (0); |
726f6388 JA |
2459 | cleanup_dead_jobs (); |
2460 | } | |
2461 | ||
2462 | /* Return the next closest (chronologically) job to JOB which is in | |
2463 | STATE. STATE can be JSTOPPED, JRUNNING. NO_JOB is returned if | |
2464 | there is no next recent job. */ | |
2465 | static int | |
2466 | most_recent_job_in_state (job, state) | |
2467 | int job; | |
2468 | JOB_STATE state; | |
2469 | { | |
2470 | register int i, result; | |
2471 | sigset_t set, oset; | |
2472 | ||
2473 | BLOCK_CHILD (set, oset); | |
7117c2d2 | 2474 | |
ccc6cda3 | 2475 | for (result = NO_JOB, i = job - 1; i >= 0; i--) |
726f6388 | 2476 | { |
ccc6cda3 | 2477 | if (jobs[i] && (JOBSTATE (i) == state)) |
726f6388 | 2478 | { |
ccc6cda3 JA |
2479 | result = i; |
2480 | break; | |
726f6388 JA |
2481 | } |
2482 | } | |
7117c2d2 | 2483 | |
726f6388 | 2484 | UNBLOCK_CHILD (oset); |
ccc6cda3 | 2485 | |
726f6388 JA |
2486 | return (result); |
2487 | } | |
2488 | ||
2489 | /* Return the newest *stopped* job older than JOB, or NO_JOB if not | |
2490 | found. */ | |
2491 | static int | |
28ef6c31 | 2492 | job_last_stopped (job) |
726f6388 JA |
2493 | int job; |
2494 | { | |
2495 | return (most_recent_job_in_state (job, JSTOPPED)); | |
2496 | } | |
2497 | ||
2498 | /* Return the newest *running* job older than JOB, or NO_JOB if not | |
2499 | found. */ | |
2500 | static int | |
28ef6c31 | 2501 | job_last_running (job) |
726f6388 JA |
2502 | int job; |
2503 | { | |
2504 | return (most_recent_job_in_state (job, JRUNNING)); | |
2505 | } | |
2506 | ||
2507 | /* Make JOB be the current job, and make previous be useful. Must be | |
2508 | called with SIGCHLD blocked. */ | |
2509 | static void | |
2510 | set_current_job (job) | |
2511 | int job; | |
2512 | { | |
ccc6cda3 | 2513 | int candidate; |
726f6388 | 2514 | |
95732b49 | 2515 | if (js.j_current != job) |
726f6388 | 2516 | { |
95732b49 JA |
2517 | js.j_previous = js.j_current; |
2518 | js.j_current = job; | |
726f6388 JA |
2519 | } |
2520 | ||
95732b49 JA |
2521 | /* First choice for previous job is the old current job. */ |
2522 | if (js.j_previous != js.j_current && | |
2523 | js.j_previous != NO_JOB && | |
2524 | jobs[js.j_previous] && | |
2525 | STOPPED (js.j_previous)) | |
726f6388 JA |
2526 | return; |
2527 | ||
2528 | /* Second choice: Newest stopped job that is older than | |
2529 | the current job. */ | |
ccc6cda3 | 2530 | candidate = NO_JOB; |
95732b49 | 2531 | if (STOPPED (js.j_current)) |
726f6388 | 2532 | { |
95732b49 | 2533 | candidate = job_last_stopped (js.j_current); |
726f6388 JA |
2534 | |
2535 | if (candidate != NO_JOB) | |
2536 | { | |
95732b49 | 2537 | js.j_previous = candidate; |
726f6388 JA |
2538 | return; |
2539 | } | |
2540 | } | |
2541 | ||
2542 | /* If we get here, there is either only one stopped job, in which case it is | |
2543 | the current job and the previous job should be set to the newest running | |
2544 | job, or there are only running jobs and the previous job should be set to | |
2545 | the newest running job older than the current job. We decide on which | |
95732b49 | 2546 | alternative to use based on whether or not JOBSTATE(js.j_current) is |
726f6388 JA |
2547 | JSTOPPED. */ |
2548 | ||
95732b49 JA |
2549 | candidate = RUNNING (js.j_current) ? job_last_running (js.j_current) |
2550 | : job_last_running (js.j_jobslots); | |
726f6388 JA |
2551 | |
2552 | if (candidate != NO_JOB) | |
2553 | { | |
95732b49 | 2554 | js.j_previous = candidate; |
726f6388 JA |
2555 | return; |
2556 | } | |
2557 | ||
2558 | /* There is only a single job, and it is both `+' and `-'. */ | |
95732b49 | 2559 | js.j_previous = js.j_current; |
726f6388 JA |
2560 | } |
2561 | ||
2562 | /* Make current_job be something useful, if it isn't already. */ | |
2563 | ||
2564 | /* Here's the deal: The newest non-running job should be `+', and the | |
2565 | next-newest non-running job should be `-'. If there is only a single | |
95732b49 | 2566 | stopped job, the js.j_previous is the newest non-running job. If there |
726f6388 JA |
2567 | are only running jobs, the newest running job is `+' and the |
2568 | next-newest running job is `-'. Must be called with SIGCHLD blocked. */ | |
ccc6cda3 | 2569 | |
726f6388 JA |
2570 | static void |
2571 | reset_current () | |
2572 | { | |
ccc6cda3 | 2573 | int candidate; |
726f6388 | 2574 | |
95732b49 JA |
2575 | if (js.j_jobslots && js.j_current != NO_JOB && jobs[js.j_current] && STOPPED (js.j_current)) |
2576 | candidate = js.j_current; | |
726f6388 JA |
2577 | else |
2578 | { | |
ccc6cda3 JA |
2579 | candidate = NO_JOB; |
2580 | ||
2581 | /* First choice: the previous job. */ | |
95732b49 JA |
2582 | if (js.j_previous != NO_JOB && jobs[js.j_previous] && STOPPED (js.j_previous)) |
2583 | candidate = js.j_previous; | |
726f6388 JA |
2584 | |
2585 | /* Second choice: the most recently stopped job. */ | |
2586 | if (candidate == NO_JOB) | |
95732b49 | 2587 | candidate = job_last_stopped (js.j_jobslots); |
726f6388 | 2588 | |
ccc6cda3 | 2589 | /* Third choice: the newest running job. */ |
726f6388 | 2590 | if (candidate == NO_JOB) |
95732b49 | 2591 | candidate = job_last_running (js.j_jobslots); |
726f6388 JA |
2592 | } |
2593 | ||
2594 | /* If we found a job to use, then use it. Otherwise, there | |
2595 | are no jobs period. */ | |
2596 | if (candidate != NO_JOB) | |
2597 | set_current_job (candidate); | |
2598 | else | |
95732b49 | 2599 | js.j_current = js.j_previous = NO_JOB; |
726f6388 JA |
2600 | } |
2601 | ||
d166f048 JA |
2602 | /* Set up the job structures so we know the job and its processes are |
2603 | all running. */ | |
2604 | static void | |
2605 | set_job_running (job) | |
2606 | int job; | |
2607 | { | |
2608 | register PROCESS *p; | |
2609 | ||
2610 | /* Each member of the pipeline is now running. */ | |
2611 | p = jobs[job]->pipe; | |
2612 | ||
2613 | do | |
2614 | { | |
2615 | if (WIFSTOPPED (p->status)) | |
7117c2d2 | 2616 | p->running = PS_RUNNING; /* XXX - could be PS_STOPPED */ |
d166f048 JA |
2617 | p = p->next; |
2618 | } | |
2619 | while (p != jobs[job]->pipe); | |
2620 | ||
2621 | /* This means that the job is running. */ | |
2622 | JOBSTATE (job) = JRUNNING; | |
2623 | } | |
2624 | ||
726f6388 JA |
2625 | /* Start a job. FOREGROUND if non-zero says to do that. Otherwise, |
2626 | start the job in the background. JOB is a zero-based index into | |
2627 | JOBS. Returns -1 if it is unable to start a job, and the return | |
2628 | status of the job otherwise. */ | |
2629 | int | |
2630 | start_job (job, foreground) | |
2631 | int job, foreground; | |
2632 | { | |
2633 | register PROCESS *p; | |
2634 | int already_running; | |
2635 | sigset_t set, oset; | |
95732b49 | 2636 | char *wd, *s; |
28ef6c31 | 2637 | static TTYSTRUCT save_stty; |
726f6388 JA |
2638 | |
2639 | BLOCK_CHILD (set, oset); | |
726f6388 | 2640 | |
ccc6cda3 | 2641 | if (DEADJOB (job)) |
726f6388 | 2642 | { |
b80f6443 | 2643 | internal_error (_("%s: job has terminated"), this_command_name); |
726f6388 JA |
2644 | UNBLOCK_CHILD (oset); |
2645 | return (-1); | |
2646 | } | |
2647 | ||
ccc6cda3 JA |
2648 | already_running = RUNNING (job); |
2649 | ||
2650 | if (foreground == 0 && already_running) | |
726f6388 | 2651 | { |
b80f6443 | 2652 | internal_error (_("%s: job %d already in background"), this_command_name, job + 1); |
726f6388 | 2653 | UNBLOCK_CHILD (oset); |
95732b49 | 2654 | return (0); /* XPG6/SUSv3 says this is not an error */ |
726f6388 JA |
2655 | } |
2656 | ||
2657 | wd = current_working_directory (); | |
2658 | ||
2659 | /* You don't know about the state of this job. Do you? */ | |
2660 | jobs[job]->flags &= ~J_NOTIFIED; | |
2661 | ||
2662 | if (foreground) | |
2663 | { | |
2664 | set_current_job (job); | |
2665 | jobs[job]->flags |= J_FOREGROUND; | |
2666 | } | |
2667 | ||
2668 | /* Tell the outside world what we're doing. */ | |
2669 | p = jobs[job]->pipe; | |
2670 | ||
ccc6cda3 | 2671 | if (foreground == 0) |
95732b49 JA |
2672 | { |
2673 | /* POSIX.2 says `bg' doesn't give any indication about current or | |
2674 | previous job. */ | |
2675 | if (posixly_correct == 0) | |
2676 | s = (job == js.j_current) ? "+ ": ((job == js.j_previous) ? "- " : " "); | |
2677 | else | |
2678 | s = " "; | |
2679 | printf ("[%d]%s", job + 1, s); | |
2680 | } | |
726f6388 JA |
2681 | |
2682 | do | |
2683 | { | |
95732b49 | 2684 | printf ("%s%s", |
726f6388 JA |
2685 | p->command ? p->command : "", |
2686 | p->next != jobs[job]->pipe? " | " : ""); | |
2687 | p = p->next; | |
2688 | } | |
2689 | while (p != jobs[job]->pipe); | |
2690 | ||
ccc6cda3 | 2691 | if (foreground == 0) |
95732b49 | 2692 | printf (" &"); |
726f6388 JA |
2693 | |
2694 | if (strcmp (wd, jobs[job]->wd) != 0) | |
95732b49 | 2695 | printf (" (wd: %s)", polite_directory_format (jobs[job]->wd)); |
726f6388 | 2696 | |
95732b49 | 2697 | printf ("\n"); |
726f6388 JA |
2698 | |
2699 | /* Run the job. */ | |
ccc6cda3 | 2700 | if (already_running == 0) |
d166f048 | 2701 | set_job_running (job); |
726f6388 JA |
2702 | |
2703 | /* Save the tty settings before we start the job in the foreground. */ | |
2704 | if (foreground) | |
2705 | { | |
2706 | get_tty_state (); | |
2707 | save_stty = shell_tty_info; | |
ccc6cda3 JA |
2708 | /* Give the terminal to this job. */ |
2709 | if (IS_JOBCONTROL (job)) | |
28ef6c31 | 2710 | give_terminal_to (jobs[job]->pgrp, 0); |
726f6388 JA |
2711 | } |
2712 | else | |
2713 | jobs[job]->flags &= ~J_FOREGROUND; | |
2714 | ||
2715 | /* If the job is already running, then don't bother jump-starting it. */ | |
ccc6cda3 | 2716 | if (already_running == 0) |
726f6388 JA |
2717 | { |
2718 | jobs[job]->flags |= J_NOTIFIED; | |
2719 | killpg (jobs[job]->pgrp, SIGCONT); | |
2720 | } | |
2721 | ||
726f6388 JA |
2722 | if (foreground) |
2723 | { | |
ccc6cda3 JA |
2724 | pid_t pid; |
2725 | int s; | |
726f6388 | 2726 | |
7117c2d2 JA |
2727 | pid = find_last_pid (job, 0); |
2728 | UNBLOCK_CHILD (oset); | |
ccc6cda3 | 2729 | s = wait_for (pid); |
726f6388 JA |
2730 | shell_tty_info = save_stty; |
2731 | set_tty_state (); | |
2732 | return (s); | |
2733 | } | |
2734 | else | |
2735 | { | |
726f6388 JA |
2736 | reset_current (); |
2737 | UNBLOCK_CHILD (oset); | |
2738 | return (0); | |
2739 | } | |
2740 | } | |
2741 | ||
2742 | /* Give PID SIGNAL. This determines what job the pid belongs to (if any). | |
2743 | If PID does belong to a job, and the job is stopped, then CONTinue the | |
2744 | job after giving it SIGNAL. Returns -1 on failure. If GROUP is non-null, | |
2745 | then kill the process group associated with PID. */ | |
2746 | int | |
2747 | kill_pid (pid, sig, group) | |
2748 | pid_t pid; | |
2749 | int sig, group; | |
2750 | { | |
2751 | register PROCESS *p; | |
95732b49 | 2752 | int job, result, negative; |
726f6388 JA |
2753 | sigset_t set, oset; |
2754 | ||
95732b49 JA |
2755 | if (pid < -1) |
2756 | { | |
2757 | pid = -pid; | |
2758 | group = negative = 1; | |
2759 | } | |
2760 | else | |
2761 | negative = 0; | |
2762 | ||
ccc6cda3 | 2763 | result = EXECUTION_SUCCESS; |
726f6388 JA |
2764 | if (group) |
2765 | { | |
f73dda09 | 2766 | BLOCK_CHILD (set, oset); |
7117c2d2 | 2767 | p = find_pipeline (pid, 0, &job); |
f73dda09 | 2768 | |
726f6388 JA |
2769 | if (job != NO_JOB) |
2770 | { | |
2771 | jobs[job]->flags &= ~J_NOTIFIED; | |
2772 | ||
2773 | /* Kill process in backquotes or one started without job control? */ | |
95732b49 JA |
2774 | |
2775 | /* If we're passed a pid < -1, just call killpg and see what happens */ | |
2776 | if (negative && jobs[job]->pgrp == shell_pgrp) | |
2777 | result = killpg (pid, sig); | |
2778 | /* If we're killing using job control notification, for example, | |
2779 | without job control active, we have to do things ourselves. */ | |
2780 | else if (jobs[job]->pgrp == shell_pgrp) | |
726f6388 JA |
2781 | { |
2782 | p = jobs[job]->pipe; | |
726f6388 JA |
2783 | do |
2784 | { | |
95732b49 JA |
2785 | if (PALIVE (p) == 0) |
2786 | continue; /* avoid pid recycling problem */ | |
726f6388 | 2787 | kill (p->pid, sig); |
95732b49 | 2788 | if (PEXITED (p) && (sig == SIGTERM || sig == SIGHUP)) |
726f6388 JA |
2789 | kill (p->pid, SIGCONT); |
2790 | p = p->next; | |
2791 | } | |
95732b49 | 2792 | while (p != jobs[job]->pipe); |
726f6388 JA |
2793 | } |
2794 | else | |
2795 | { | |
2796 | result = killpg (jobs[job]->pgrp, sig); | |
ccc6cda3 | 2797 | if (p && STOPPED (job) && (sig == SIGTERM || sig == SIGHUP)) |
726f6388 | 2798 | killpg (jobs[job]->pgrp, SIGCONT); |
d166f048 JA |
2799 | /* If we're continuing a stopped job via kill rather than bg or |
2800 | fg, emulate the `bg' behavior. */ | |
2801 | if (p && STOPPED (job) && (sig == SIGCONT)) | |
2802 | { | |
2803 | set_job_running (job); | |
2804 | jobs[job]->flags &= ~J_FOREGROUND; | |
2805 | jobs[job]->flags |= J_NOTIFIED; | |
2806 | } | |
726f6388 JA |
2807 | } |
2808 | } | |
2809 | else | |
2810 | result = killpg (pid, sig); | |
f73dda09 JA |
2811 | |
2812 | UNBLOCK_CHILD (oset); | |
726f6388 JA |
2813 | } |
2814 | else | |
2815 | result = kill (pid, sig); | |
2816 | ||
726f6388 JA |
2817 | return (result); |
2818 | } | |
2819 | ||
ccc6cda3 JA |
2820 | /* sigchld_handler () flushes at least one of the children that we are |
2821 | waiting for. It gets run when we have gotten a SIGCHLD signal. */ | |
726f6388 | 2822 | static sighandler |
ccc6cda3 | 2823 | sigchld_handler (sig) |
726f6388 JA |
2824 | int sig; |
2825 | { | |
bb70624e | 2826 | int n, oerrno; |
ccc6cda3 | 2827 | |
bb70624e | 2828 | oerrno = errno; |
726f6388 JA |
2829 | REINSTALL_SIGCHLD_HANDLER; |
2830 | sigchld++; | |
ccc6cda3 | 2831 | n = 0; |
7117c2d2 | 2832 | if (queue_sigchld == 0) |
ccc6cda3 | 2833 | n = waitchld (-1, 0); |
bb70624e | 2834 | errno = oerrno; |
ccc6cda3 | 2835 | SIGRETURN (n); |
726f6388 | 2836 | } |
ccc6cda3 JA |
2837 | |
2838 | /* waitchld() reaps dead or stopped children. It's called by wait_for and | |
bb70624e JA |
2839 | sigchld_handler, and runs until there aren't any children terminating any |
2840 | more. | |
ccc6cda3 | 2841 | If BLOCK is 1, this is to be a blocking wait for a single child, although |
bb70624e JA |
2842 | an arriving SIGCHLD could cause the wait to be non-blocking. It returns |
2843 | the number of children reaped, or -1 if there are no unwaited-for child | |
2844 | processes. */ | |
726f6388 | 2845 | static int |
ccc6cda3 JA |
2846 | waitchld (wpid, block) |
2847 | pid_t wpid; | |
2848 | int block; | |
726f6388 JA |
2849 | { |
2850 | WAIT status; | |
2851 | PROCESS *child; | |
2852 | pid_t pid; | |
28ef6c31 | 2853 | int call_set_current, last_stopped_job, job, children_exited, waitpid_flags; |
95732b49 | 2854 | static int wcontinued = WCONTINUED; /* run-time fix for glibc problem */ |
ccc6cda3 JA |
2855 | |
2856 | call_set_current = children_exited = 0; | |
2857 | last_stopped_job = NO_JOB; | |
726f6388 JA |
2858 | |
2859 | do | |
2860 | { | |
d166f048 | 2861 | /* We don't want to be notified about jobs stopping if job control |
28ef6c31 | 2862 | is not active. XXX - was interactive_shell instead of job_control */ |
d166f048 | 2863 | waitpid_flags = (job_control && subshell_environment == 0) |
95732b49 | 2864 | ? (WUNTRACED|wcontinued) |
ccc6cda3 JA |
2865 | : 0; |
2866 | if (sigchld || block == 0) | |
2867 | waitpid_flags |= WNOHANG; | |
2868 | pid = WAITPID (-1, &status, waitpid_flags); | |
f73dda09 | 2869 | |
95732b49 JA |
2870 | /* WCONTINUED may be rejected by waitpid as invalid even when defined */ |
2871 | if (wcontinued && pid < 0 && errno == EINVAL) | |
2872 | { | |
2873 | wcontinued = 0; | |
2874 | continue; /* jump back to the test and retry without WCONTINUED */ | |
2875 | } | |
2876 | ||
ccc6cda3 JA |
2877 | /* The check for WNOHANG is to make sure we decrement sigchld only |
2878 | if it was non-zero before we called waitpid. */ | |
2879 | if (sigchld > 0 && (waitpid_flags & WNOHANG)) | |
2880 | sigchld--; | |
bb70624e JA |
2881 | |
2882 | /* If waitpid returns -1 with errno == ECHILD, there are no more | |
2883 | unwaited-for child processes of this shell. */ | |
2884 | if (pid < 0 && errno == ECHILD) | |
2885 | { | |
2886 | if (children_exited == 0) | |
2887 | return -1; | |
2888 | else | |
2889 | break; | |
2890 | } | |
ccc6cda3 | 2891 | |
bb70624e JA |
2892 | /* If waitpid returns 0, there are running children. If it returns -1, |
2893 | the only other error POSIX says it can return is EINTR. */ | |
ccc6cda3 JA |
2894 | if (pid <= 0) |
2895 | continue; /* jumps right to the test */ | |
2896 | ||
f73dda09 JA |
2897 | /* children_exited is used to run traps on SIGCHLD. We don't want to |
2898 | run the trap if a process is just being continued. */ | |
2899 | if (WIFCONTINUED(status) == 0) | |
2900 | children_exited++; | |
ccc6cda3 JA |
2901 | |
2902 | /* Locate our PROCESS for this pid. */ | |
95732b49 | 2903 | child = find_process (pid, 1, &job); /* want living procs only */ |
ccc6cda3 JA |
2904 | |
2905 | /* It is not an error to have a child terminate that we did | |
2906 | not have a record of. This child could have been part of | |
2907 | a pipeline in backquote substitution. Even so, I'm not | |
2908 | sure child is ever non-zero. */ | |
2909 | if (child == 0) | |
2910 | continue; | |
2911 | ||
f73dda09 | 2912 | /* Remember status, and whether or not the process is running. */ |
ccc6cda3 | 2913 | child->status = status; |
7117c2d2 | 2914 | child->running = WIFCONTINUED(status) ? PS_RUNNING : PS_DONE; |
ccc6cda3 | 2915 | |
95732b49 JA |
2916 | if (PEXITED (child)) |
2917 | { | |
2918 | js.c_totreaped++; | |
2919 | if (job != NO_JOB) | |
2920 | js.c_reaped++; | |
2921 | } | |
2922 | ||
ccc6cda3 | 2923 | if (job == NO_JOB) |
28ef6c31 | 2924 | continue; |
726f6388 | 2925 | |
28ef6c31 | 2926 | call_set_current += set_job_status_and_cleanup (job); |
726f6388 | 2927 | |
28ef6c31 JA |
2928 | if (STOPPED (job)) |
2929 | last_stopped_job = job; | |
2930 | else if (DEADJOB (job) && last_stopped_job == job) | |
2931 | last_stopped_job = NO_JOB; | |
726f6388 | 2932 | } |
ccc6cda3 | 2933 | while ((sigchld || block == 0) && pid > (pid_t)0); |
726f6388 JA |
2934 | |
2935 | /* If a job was running and became stopped, then set the current | |
2936 | job. Otherwise, don't change a thing. */ | |
2937 | if (call_set_current) | |
bb70624e JA |
2938 | { |
2939 | if (last_stopped_job != NO_JOB) | |
2940 | set_current_job (last_stopped_job); | |
2941 | else | |
2942 | reset_current (); | |
2943 | } | |
726f6388 JA |
2944 | |
2945 | /* Call a SIGCHLD trap handler for each child that exits, if one is set. */ | |
bb70624e | 2946 | if (job_control && signal_is_trapped (SIGCHLD) && children_exited && |
726f6388 | 2947 | trap_list[SIGCHLD] != (char *)IGNORE_SIG) |
28ef6c31 | 2948 | run_sigchld_trap (children_exited); |
726f6388 JA |
2949 | |
2950 | /* We have successfully recorded the useful information about this process | |
2951 | that has just changed state. If we notify asynchronously, and the job | |
2952 | that this process belongs to is no longer running, then notify the user | |
2953 | of that fact now. */ | |
2954 | if (asynchronous_notification && interactive) | |
2955 | notify_of_job_status (); | |
2956 | ||
ccc6cda3 | 2957 | return (children_exited); |
726f6388 JA |
2958 | } |
2959 | ||
28ef6c31 JA |
2960 | /* Set the status of JOB and perform any necessary cleanup if the job is |
2961 | marked as JDEAD. | |
2962 | ||
2963 | Currently, the cleanup activity is restricted to handling any SIGINT | |
2964 | received while waiting for a foreground job to finish. */ | |
2965 | static int | |
2966 | set_job_status_and_cleanup (job) | |
2967 | int job; | |
2968 | { | |
2969 | PROCESS *child; | |
2970 | int tstatus, job_state, any_stopped, any_tstped, call_set_current; | |
2971 | SigHandler *temp_handler; | |
2972 | ||
2973 | child = jobs[job]->pipe; | |
2974 | jobs[job]->flags &= ~J_NOTIFIED; | |
2975 | ||
2976 | call_set_current = 0; | |
2977 | ||
2978 | /* | |
2979 | * COMPUTE JOB STATUS | |
2980 | */ | |
2981 | ||
2982 | /* If all children are not running, but any of them is stopped, then | |
2983 | the job is stopped, not dead. */ | |
2984 | job_state = any_stopped = any_tstped = 0; | |
2985 | do | |
2986 | { | |
95732b49 JA |
2987 | job_state |= PRUNNING (child); |
2988 | #if 0 | |
2989 | if (PEXITED (child) && (WIFSTOPPED (child->status))) | |
2990 | #else | |
2991 | /* Only checking for WIFSTOPPED now, not for PS_DONE */ | |
2992 | if (PSTOPPED (child)) | |
2993 | #endif | |
28ef6c31 JA |
2994 | { |
2995 | any_stopped = 1; | |
2996 | any_tstped |= interactive && job_control && | |
2997 | (WSTOPSIG (child->status) == SIGTSTP); | |
2998 | } | |
2999 | child = child->next; | |
3000 | } | |
3001 | while (child != jobs[job]->pipe); | |
3002 | ||
3003 | /* If job_state != 0, the job is still running, so don't bother with | |
f73dda09 JA |
3004 | setting the process exit status and job state unless we're |
3005 | transitioning from stopped to running. */ | |
3006 | if (job_state != 0 && JOBSTATE(job) != JSTOPPED) | |
28ef6c31 JA |
3007 | return 0; |
3008 | ||
3009 | /* | |
3010 | * SET JOB STATUS | |
3011 | */ | |
3012 | ||
3013 | /* The job is either stopped or dead. Set the state of the job accordingly. */ | |
3014 | if (any_stopped) | |
3015 | { | |
3016 | jobs[job]->state = JSTOPPED; | |
3017 | jobs[job]->flags &= ~J_FOREGROUND; | |
3018 | call_set_current++; | |
3019 | /* Suspending a job with SIGTSTP breaks all active loops. */ | |
3020 | if (any_tstped && loop_level) | |
3021 | breaking = loop_level; | |
3022 | } | |
f73dda09 JA |
3023 | else if (job_state != 0) /* was stopped, now running */ |
3024 | { | |
3025 | jobs[job]->state = JRUNNING; | |
3026 | call_set_current++; | |
3027 | } | |
28ef6c31 JA |
3028 | else |
3029 | { | |
3030 | jobs[job]->state = JDEAD; | |
95732b49 | 3031 | js.j_ndead++; |
28ef6c31 | 3032 | |
7117c2d2 | 3033 | #if 0 |
28ef6c31 JA |
3034 | if (IS_FOREGROUND (job)) |
3035 | setjstatus (job); | |
7117c2d2 | 3036 | #endif |
28ef6c31 JA |
3037 | |
3038 | /* If this job has a cleanup function associated with it, call it | |
3039 | with `cleanarg' as the single argument, then set the function | |
3040 | pointer to NULL so it is not inadvertently called twice. The | |
3041 | cleanup function is responsible for deallocating cleanarg. */ | |
3042 | if (jobs[job]->j_cleanup) | |
3043 | { | |
3044 | (*jobs[job]->j_cleanup) (jobs[job]->cleanarg); | |
f73dda09 | 3045 | jobs[job]->j_cleanup = (sh_vptrfunc_t *)NULL; |
28ef6c31 JA |
3046 | } |
3047 | } | |
3048 | ||
3049 | /* | |
3050 | * CLEANUP | |
3051 | * | |
3052 | * Currently, we just do special things if we got a SIGINT while waiting | |
3053 | * for a foreground job to complete | |
3054 | */ | |
3055 | ||
95732b49 | 3056 | if (JOBSTATE (job) == JDEAD) |
28ef6c31 JA |
3057 | { |
3058 | /* If we're running a shell script and we get a SIGINT with a | |
3059 | SIGINT trap handler, but the foreground job handles it and | |
3060 | does not exit due to SIGINT, run the trap handler but do not | |
3061 | otherwise act as if we got the interrupt. */ | |
3062 | if (wait_sigint_received && interactive_shell == 0 && | |
3063 | WIFSIGNALED (child->status) == 0 && IS_FOREGROUND (job) && | |
3064 | signal_is_trapped (SIGINT)) | |
3065 | { | |
7117c2d2 | 3066 | int old_frozen; |
28ef6c31 JA |
3067 | wait_sigint_received = 0; |
3068 | last_command_exit_value = process_exit_status (child->status); | |
3069 | ||
7117c2d2 | 3070 | old_frozen = jobs_list_frozen; |
28ef6c31 JA |
3071 | jobs_list_frozen = 1; |
3072 | tstatus = maybe_call_trap_handler (SIGINT); | |
7117c2d2 | 3073 | jobs_list_frozen = old_frozen; |
28ef6c31 JA |
3074 | } |
3075 | ||
3076 | /* If the foreground job is killed by SIGINT when job control is not | |
3077 | active, we need to perform some special handling. | |
3078 | ||
3079 | The check of wait_sigint_received is a way to determine if the | |
3080 | SIGINT came from the keyboard (in which case the shell has already | |
3081 | seen it, and wait_sigint_received is non-zero, because keyboard | |
3082 | signals are sent to process groups) or via kill(2) to the foreground | |
3083 | process by another process (or itself). If the shell did receive the | |
3084 | SIGINT, it needs to perform normal SIGINT processing. */ | |
3085 | else if (wait_sigint_received && (WTERMSIG (child->status) == SIGINT) && | |
3086 | IS_FOREGROUND (job) && IS_JOBCONTROL (job) == 0) | |
3087 | { | |
7117c2d2 JA |
3088 | int old_frozen; |
3089 | ||
28ef6c31 JA |
3090 | wait_sigint_received = 0; |
3091 | ||
3092 | /* If SIGINT is trapped, set the exit status so that the trap | |
3093 | handler can see it. */ | |
3094 | if (signal_is_trapped (SIGINT)) | |
3095 | last_command_exit_value = process_exit_status (child->status); | |
3096 | ||
3097 | /* If the signal is trapped, let the trap handler get it no matter | |
3098 | what and simply return if the trap handler returns. | |
3099 | maybe_call_trap_handler() may cause dead jobs to be removed from | |
3100 | the job table because of a call to execute_command. We work | |
3101 | around this by setting JOBS_LIST_FROZEN. */ | |
7117c2d2 | 3102 | old_frozen = jobs_list_frozen; |
28ef6c31 JA |
3103 | jobs_list_frozen = 1; |
3104 | tstatus = maybe_call_trap_handler (SIGINT); | |
7117c2d2 | 3105 | jobs_list_frozen = old_frozen; |
28ef6c31 JA |
3106 | if (tstatus == 0 && old_sigint_handler != INVALID_SIGNAL_HANDLER) |
3107 | { | |
3108 | /* wait_sigint_handler () has already seen SIGINT and | |
3109 | allowed the wait builtin to jump out. We need to | |
3110 | call the original SIGINT handler, if necessary. If | |
3111 | the original handler is SIG_DFL, we need to resend | |
3112 | the signal to ourselves. */ | |
3113 | ||
3114 | temp_handler = old_sigint_handler; | |
3115 | ||
3116 | /* Bogus. If we've reset the signal handler as the result | |
3117 | of a trap caught on SIGINT, then old_sigint_handler | |
3118 | will point to trap_handler, which now knows nothing about | |
3119 | SIGINT (if we reset the sighandler to the default). | |
3120 | In this case, we have to fix things up. What a crock. */ | |
3121 | if (temp_handler == trap_handler && signal_is_trapped (SIGINT) == 0) | |
3122 | temp_handler = trap_to_sighandler (SIGINT); | |
3123 | restore_sigint_handler (); | |
95732b49 JA |
3124 | if (temp_handler == SIG_DFL) |
3125 | termination_unwind_protect (SIGINT); | |
3126 | else if (temp_handler != SIG_IGN) | |
3127 | (*temp_handler) (SIGINT); | |
28ef6c31 JA |
3128 | } |
3129 | } | |
3130 | } | |
3131 | ||
3132 | return call_set_current; | |
3133 | } | |
3134 | ||
3135 | /* Build the array of values for the $PIPESTATUS variable from the set of | |
3136 | exit statuses of all processes in the job J. */ | |
3137 | static void | |
3138 | setjstatus (j) | |
3139 | int j; | |
3140 | { | |
3141 | #if defined (ARRAY_VARS) | |
3142 | register int i; | |
3143 | register PROCESS *p; | |
3144 | ||
3145 | for (i = 1, p = jobs[j]->pipe; p->next != jobs[j]->pipe; p = p->next, i++) | |
3146 | ; | |
3147 | i++; | |
7117c2d2 | 3148 | if (statsize < i) |
28ef6c31 JA |
3149 | { |
3150 | pstatuses = (int *)xrealloc (pstatuses, i * sizeof (int)); | |
3151 | statsize = i; | |
3152 | } | |
3153 | i = 0; | |
3154 | p = jobs[j]->pipe; | |
3155 | do | |
3156 | { | |
3157 | pstatuses[i++] = process_exit_status (p->status); | |
3158 | p = p->next; | |
3159 | } | |
3160 | while (p != jobs[j]->pipe); | |
3161 | ||
3162 | pstatuses[i] = -1; /* sentinel */ | |
7117c2d2 | 3163 | set_pipestatus_array (pstatuses, i); |
28ef6c31 JA |
3164 | #endif |
3165 | } | |
3166 | ||
3167 | static void | |
3168 | run_sigchld_trap (nchild) | |
3169 | int nchild; | |
3170 | { | |
3171 | char *trap_command; | |
3172 | int i; | |
3173 | ||
3174 | /* Turn off the trap list during the call to parse_and_execute () | |
3175 | to avoid potentially infinite recursive calls. Preserve the | |
3176 | values of last_command_exit_value, last_made_pid, and the_pipeline | |
3177 | around the execution of the trap commands. */ | |
3178 | trap_command = savestring (trap_list[SIGCHLD]); | |
3179 | ||
3180 | begin_unwind_frame ("SIGCHLD trap"); | |
3181 | unwind_protect_int (last_command_exit_value); | |
b80f6443 | 3182 | unwind_protect_int (last_command_exit_signal); |
f73dda09 | 3183 | unwind_protect_var (last_made_pid); |
28ef6c31 JA |
3184 | unwind_protect_int (interrupt_immediately); |
3185 | unwind_protect_int (jobs_list_frozen); | |
3186 | unwind_protect_pointer (the_pipeline); | |
3187 | unwind_protect_pointer (subst_assign_varlist); | |
3188 | ||
3189 | /* We have to add the commands this way because they will be run | |
3190 | in reverse order of adding. We don't want maybe_set_sigchld_trap () | |
3191 | to reference freed memory. */ | |
b80f6443 JA |
3192 | add_unwind_protect (xfree, trap_command); |
3193 | add_unwind_protect (maybe_set_sigchld_trap, trap_command); | |
28ef6c31 JA |
3194 | |
3195 | subst_assign_varlist = (WORD_LIST *)NULL; | |
3196 | the_pipeline = (PROCESS *)NULL; | |
3197 | ||
3198 | restore_default_signal (SIGCHLD); | |
3199 | jobs_list_frozen = 1; | |
3200 | for (i = 0; i < nchild; i++) | |
3201 | { | |
3202 | interrupt_immediately = 1; | |
b80f6443 | 3203 | parse_and_execute (savestring (trap_command), "trap", SEVAL_NOHIST|SEVAL_RESETLINE); |
28ef6c31 JA |
3204 | } |
3205 | ||
3206 | run_unwind_frame ("SIGCHLD trap"); | |
3207 | } | |
3208 | ||
726f6388 JA |
3209 | /* Function to call when you want to notify people of changes |
3210 | in job status. This prints out all jobs which are pending | |
3211 | notification to stderr, and marks those printed as already | |
3212 | notified, thus making them candidates for cleanup. */ | |
3213 | static void | |
3214 | notify_of_job_status () | |
3215 | { | |
3216 | register int job, termsig; | |
3217 | char *dir; | |
3218 | sigset_t set, oset; | |
ccc6cda3 | 3219 | WAIT s; |
726f6388 | 3220 | |
95732b49 | 3221 | if (jobs == 0 || js.j_jobslots == 0) |
28ef6c31 JA |
3222 | return; |
3223 | ||
7117c2d2 JA |
3224 | if (old_ttou != 0) |
3225 | { | |
3226 | sigemptyset (&set); | |
3227 | sigaddset (&set, SIGCHLD); | |
3228 | sigaddset (&set, SIGTTOU); | |
3229 | sigemptyset (&oset); | |
3230 | sigprocmask (SIG_BLOCK, &set, &oset); | |
3231 | } | |
3232 | else | |
3233 | queue_sigchld++; | |
726f6388 | 3234 | |
95732b49 JA |
3235 | /* XXX could use js.j_firstj here */ |
3236 | for (job = 0, dir = (char *)NULL; job < js.j_jobslots; job++) | |
726f6388 | 3237 | { |
ccc6cda3 | 3238 | if (jobs[job] && IS_NOTIFIED (job) == 0) |
726f6388 | 3239 | { |
bb70624e | 3240 | s = raw_job_exit_status (job); |
726f6388 JA |
3241 | termsig = WTERMSIG (s); |
3242 | ||
b72432fd JA |
3243 | /* POSIX.2 says we have to hang onto the statuses of at most the |
3244 | last CHILD_MAX background processes if the shell is running a | |
95732b49 JA |
3245 | script. If the shell is running a script, either from a file |
3246 | or standard input, don't print anything unless the job was | |
3247 | killed by a signal. */ | |
b72432fd JA |
3248 | if (startup_state == 0 && WIFSIGNALED (s) == 0 && |
3249 | ((DEADJOB (job) && IS_FOREGROUND (job) == 0) || STOPPED (job))) | |
3250 | continue; | |
3251 | ||
b80f6443 | 3252 | #if 0 |
726f6388 | 3253 | /* If job control is disabled, don't print the status messages. |
ccc6cda3 JA |
3254 | Mark dead jobs as notified so that they get cleaned up. If |
3255 | startup_state == 2, we were started to run `-c command', so | |
b72432fd JA |
3256 | don't print anything. */ |
3257 | if ((job_control == 0 && interactive_shell) || startup_state == 2) | |
b80f6443 JA |
3258 | #else |
3259 | /* If job control is disabled, don't print the status messages. | |
3260 | Mark dead jobs as notified so that they get cleaned up. If | |
3261 | startup_state == 2 and subshell_environment has the | |
3262 | SUBSHELL_COMSUB bit turned on, we were started to run a command | |
3263 | substitution, so don't print anything. */ | |
3264 | if ((job_control == 0 && interactive_shell) || | |
3265 | (startup_state == 2 && (subshell_environment & SUBSHELL_COMSUB))) | |
3266 | #endif | |
726f6388 | 3267 | { |
cce855bc JA |
3268 | /* POSIX.2 compatibility: if the shell is not interactive, |
3269 | hang onto the job corresponding to the last asynchronous | |
3270 | pid until the user has been notified of its status or does | |
3271 | a `wait'. */ | |
7117c2d2 | 3272 | if (DEADJOB (job) && (interactive_shell || (find_last_pid (job, 0) != last_asynchronous_pid))) |
726f6388 JA |
3273 | jobs[job]->flags |= J_NOTIFIED; |
3274 | continue; | |
3275 | } | |
3276 | ||
ccc6cda3 JA |
3277 | /* Print info on jobs that are running in the background, |
3278 | and on foreground jobs that were killed by anything | |
d166f048 | 3279 | except SIGINT (and possibly SIGPIPE). */ |
726f6388 JA |
3280 | switch (JOBSTATE (job)) |
3281 | { | |
726f6388 | 3282 | case JDEAD: |
ccc6cda3 | 3283 | if (interactive_shell == 0 && termsig && WIFSIGNALED (s) && |
cce855bc | 3284 | termsig != SIGINT && |
cce855bc JA |
3285 | #if defined (DONT_REPORT_SIGPIPE) |
3286 | termsig != SIGPIPE && | |
3287 | #endif | |
ccc6cda3 | 3288 | signal_is_trapped (termsig) == 0) |
28ef6c31 | 3289 | { |
b80f6443 JA |
3290 | /* Don't print `0' for a line number. */ |
3291 | fprintf (stderr, "%s: line %d: ", get_name_for_error (), (line_number == 0) ? 1 : line_number); | |
ccc6cda3 JA |
3292 | pretty_print_job (job, JLIST_NONINTERACTIVE, stderr); |
3293 | } | |
3294 | else if (IS_FOREGROUND (job)) | |
726f6388 | 3295 | { |
d166f048 | 3296 | #if !defined (DONT_REPORT_SIGPIPE) |
726f6388 | 3297 | if (termsig && WIFSIGNALED (s) && termsig != SIGINT) |
d166f048 JA |
3298 | #else |
3299 | if (termsig && WIFSIGNALED (s) && termsig != SIGINT && termsig != SIGPIPE) | |
3300 | #endif | |
726f6388 | 3301 | { |
b80f6443 | 3302 | fprintf (stderr, "%s", j_strsignal (termsig)); |
726f6388 JA |
3303 | |
3304 | if (WIFCORED (s)) | |
3305 | fprintf (stderr, " (core dumped)"); | |
3306 | ||
3307 | fprintf (stderr, "\n"); | |
3308 | } | |
3309 | } | |
95732b49 | 3310 | else if (job_control) /* XXX job control test added */ |
726f6388 | 3311 | { |
ccc6cda3 | 3312 | if (dir == 0) |
726f6388 | 3313 | dir = current_working_directory (); |
ccc6cda3 | 3314 | pretty_print_job (job, JLIST_STANDARD, stderr); |
726f6388 JA |
3315 | if (dir && strcmp (dir, jobs[job]->wd) != 0) |
3316 | fprintf (stderr, | |
3317 | "(wd now: %s)\n", polite_directory_format (dir)); | |
3318 | } | |
3319 | ||
3320 | jobs[job]->flags |= J_NOTIFIED; | |
3321 | break; | |
3322 | ||
3323 | case JSTOPPED: | |
3324 | fprintf (stderr, "\n"); | |
ccc6cda3 | 3325 | if (dir == 0) |
726f6388 | 3326 | dir = current_working_directory (); |
ccc6cda3 | 3327 | pretty_print_job (job, JLIST_STANDARD, stderr); |
726f6388 JA |
3328 | if (dir && (strcmp (dir, jobs[job]->wd) != 0)) |
3329 | fprintf (stderr, | |
3330 | "(wd now: %s)\n", polite_directory_format (dir)); | |
3331 | jobs[job]->flags |= J_NOTIFIED; | |
3332 | break; | |
3333 | ||
3334 | case JRUNNING: | |
3335 | case JMIXED: | |
3336 | break; | |
3337 | ||
3338 | default: | |
3339 | programming_error ("notify_of_job_status"); | |
3340 | } | |
3341 | } | |
3342 | } | |
7117c2d2 JA |
3343 | if (old_ttou != 0) |
3344 | sigprocmask (SIG_SETMASK, &oset, (sigset_t *)NULL); | |
3345 | else | |
3346 | queue_sigchld--; | |
726f6388 JA |
3347 | } |
3348 | ||
726f6388 | 3349 | /* Initialize the job control mechanism, and set up the tty stuff. */ |
ccc6cda3 | 3350 | int |
d166f048 JA |
3351 | initialize_job_control (force) |
3352 | int force; | |
726f6388 JA |
3353 | { |
3354 | shell_pgrp = getpgid (0); | |
3355 | ||
3356 | if (shell_pgrp == -1) | |
3357 | { | |
d166f048 | 3358 | sys_error ("initialize_job_control: getpgrp failed"); |
726f6388 JA |
3359 | exit (1); |
3360 | } | |
3361 | ||
ccc6cda3 JA |
3362 | /* We can only have job control if we are interactive. */ |
3363 | if (interactive == 0) | |
726f6388 JA |
3364 | { |
3365 | job_control = 0; | |
3366 | original_pgrp = NO_PID; | |
d166f048 | 3367 | shell_tty = fileno (stderr); |
726f6388 JA |
3368 | } |
3369 | else | |
3370 | { | |
726f6388 JA |
3371 | /* Get our controlling terminal. If job_control is set, or |
3372 | interactive is set, then this is an interactive shell no | |
ccc6cda3 JA |
3373 | matter where fd 2 is directed. */ |
3374 | shell_tty = dup (fileno (stderr)); /* fd 2 */ | |
726f6388 | 3375 | |
d166f048 | 3376 | shell_tty = move_to_high_fd (shell_tty, 1, -1); |
726f6388 | 3377 | |
726f6388 | 3378 | /* Compensate for a bug in systems that compiled the BSD |
ccc6cda3 | 3379 | rlogind with DEBUG defined, like NeXT and Alliant. */ |
726f6388 JA |
3380 | if (shell_pgrp == 0) |
3381 | { | |
3382 | shell_pgrp = getpid (); | |
3383 | setpgid (0, shell_pgrp); | |
3384 | tcsetpgrp (shell_tty, shell_pgrp); | |
3385 | } | |
726f6388 JA |
3386 | |
3387 | while ((terminal_pgrp = tcgetpgrp (shell_tty)) != -1) | |
3388 | { | |
3389 | if (shell_pgrp != terminal_pgrp) | |
3390 | { | |
7117c2d2 | 3391 | SigHandler *ottin; |
ccc6cda3 | 3392 | |
7117c2d2 | 3393 | ottin = set_signal_handler(SIGTTIN, SIG_DFL); |
726f6388 | 3394 | kill (0, SIGTTIN); |
7117c2d2 | 3395 | set_signal_handler (SIGTTIN, ottin); |
726f6388 JA |
3396 | continue; |
3397 | } | |
3398 | break; | |
3399 | } | |
3400 | ||
ccc6cda3 | 3401 | /* Make sure that we are using the new line discipline. */ |
726f6388 JA |
3402 | if (set_new_line_discipline (shell_tty) < 0) |
3403 | { | |
d166f048 | 3404 | sys_error ("initialize_job_control: line discipline"); |
726f6388 JA |
3405 | job_control = 0; |
3406 | } | |
3407 | else | |
3408 | { | |
3409 | original_pgrp = shell_pgrp; | |
3410 | shell_pgrp = getpid (); | |
3411 | ||
3412 | if ((original_pgrp != shell_pgrp) && (setpgid (0, shell_pgrp) < 0)) | |
3413 | { | |
d166f048 | 3414 | sys_error ("initialize_job_control: setpgid"); |
726f6388 JA |
3415 | shell_pgrp = original_pgrp; |
3416 | } | |
3417 | ||
3418 | job_control = 1; | |
ccc6cda3 JA |
3419 | |
3420 | /* If (and only if) we just set our process group to our pid, | |
3421 | thereby becoming a process group leader, and the terminal | |
3422 | is not in the same process group as our (new) process group, | |
3423 | then set the terminal's process group to our (new) process | |
3424 | group. If that fails, set our process group back to what it | |
3425 | was originally (so we can still read from the terminal) and | |
3426 | turn off job control. */ | |
3427 | if (shell_pgrp != original_pgrp && shell_pgrp != terminal_pgrp) | |
3428 | { | |
28ef6c31 | 3429 | if (give_terminal_to (shell_pgrp, 0) < 0) |
ccc6cda3 | 3430 | { |
28ef6c31 JA |
3431 | setpgid (0, original_pgrp); |
3432 | shell_pgrp = original_pgrp; | |
3433 | job_control = 0; | |
ccc6cda3 JA |
3434 | } |
3435 | } | |
726f6388 JA |
3436 | } |
3437 | if (job_control == 0) | |
b80f6443 | 3438 | internal_error (_("no job control in this shell")); |
726f6388 JA |
3439 | } |
3440 | ||
3441 | if (shell_tty != fileno (stderr)) | |
3442 | SET_CLOSE_ON_EXEC (shell_tty); | |
3443 | ||
ccc6cda3 | 3444 | set_signal_handler (SIGCHLD, sigchld_handler); |
726f6388 JA |
3445 | |
3446 | change_flag ('m', job_control ? '-' : '+'); | |
3447 | ||
3448 | if (interactive) | |
3449 | get_tty_state (); | |
ccc6cda3 | 3450 | |
95732b49 JA |
3451 | if (js.c_childmax < 0) |
3452 | js.c_childmax = getmaxchild (); | |
3453 | if (js.c_childmax < 0) | |
3454 | js.c_childmax = DEFAULT_CHILD_MAX; | |
3455 | ||
726f6388 JA |
3456 | return job_control; |
3457 | } | |
3458 | ||
28ef6c31 JA |
3459 | #ifdef DEBUG |
3460 | void | |
3461 | debug_print_pgrps () | |
3462 | { | |
f73dda09 JA |
3463 | itrace("original_pgrp = %ld shell_pgrp = %ld terminal_pgrp = %ld", |
3464 | (long)original_pgrp, (long)shell_pgrp, (long)terminal_pgrp); | |
3465 | itrace("tcgetpgrp(%d) -> %ld, getpgid(0) -> %ld", | |
3466 | shell_tty, (long)tcgetpgrp (shell_tty), (long)getpgid(0)); | |
28ef6c31 JA |
3467 | } |
3468 | #endif | |
3469 | ||
726f6388 JA |
3470 | /* Set the line discipline to the best this system has to offer. |
3471 | Return -1 if this is not possible. */ | |
3472 | static int | |
3473 | set_new_line_discipline (tty) | |
3474 | int tty; | |
3475 | { | |
3476 | #if defined (NEW_TTY_DRIVER) | |
3477 | int ldisc; | |
3478 | ||
3479 | if (ioctl (tty, TIOCGETD, &ldisc) < 0) | |
3480 | return (-1); | |
3481 | ||
3482 | if (ldisc != NTTYDISC) | |
3483 | { | |
3484 | ldisc = NTTYDISC; | |
3485 | ||
3486 | if (ioctl (tty, TIOCSETD, &ldisc) < 0) | |
3487 | return (-1); | |
3488 | } | |
3489 | return (0); | |
3490 | #endif /* NEW_TTY_DRIVER */ | |
3491 | ||
3492 | #if defined (TERMIO_TTY_DRIVER) | |
ccc6cda3 | 3493 | # if defined (TERMIO_LDISC) && (NTTYDISC) |
726f6388 JA |
3494 | if (ioctl (tty, TCGETA, &shell_tty_info) < 0) |
3495 | return (-1); | |
3496 | ||
3497 | if (shell_tty_info.c_line != NTTYDISC) | |
3498 | { | |
3499 | shell_tty_info.c_line = NTTYDISC; | |
3500 | if (ioctl (tty, TCSETAW, &shell_tty_info) < 0) | |
3501 | return (-1); | |
3502 | } | |
ccc6cda3 | 3503 | # endif /* TERMIO_LDISC && NTTYDISC */ |
726f6388 JA |
3504 | return (0); |
3505 | #endif /* TERMIO_TTY_DRIVER */ | |
3506 | ||
3507 | #if defined (TERMIOS_TTY_DRIVER) | |
ccc6cda3 | 3508 | # if defined (TERMIOS_LDISC) && defined (NTTYDISC) |
726f6388 JA |
3509 | if (tcgetattr (tty, &shell_tty_info) < 0) |
3510 | return (-1); | |
3511 | ||
3512 | if (shell_tty_info.c_line != NTTYDISC) | |
3513 | { | |
3514 | shell_tty_info.c_line = NTTYDISC; | |
3515 | if (tcsetattr (tty, TCSADRAIN, &shell_tty_info) < 0) | |
3516 | return (-1); | |
3517 | } | |
ccc6cda3 | 3518 | # endif /* TERMIOS_LDISC && NTTYDISC */ |
726f6388 JA |
3519 | return (0); |
3520 | #endif /* TERMIOS_TTY_DRIVER */ | |
3521 | ||
3522 | #if !defined (NEW_TTY_DRIVER) && !defined (TERMIO_TTY_DRIVER) && !defined (TERMIOS_TTY_DRIVER) | |
3523 | return (-1); | |
3524 | #endif | |
3525 | } | |
3526 | ||
726f6388 JA |
3527 | /* Setup this shell to handle C-C, etc. */ |
3528 | void | |
3529 | initialize_job_signals () | |
3530 | { | |
3531 | if (interactive) | |
3532 | { | |
3533 | set_signal_handler (SIGINT, sigint_sighandler); | |
3534 | set_signal_handler (SIGTSTP, SIG_IGN); | |
3535 | set_signal_handler (SIGTTOU, SIG_IGN); | |
3536 | set_signal_handler (SIGTTIN, SIG_IGN); | |
726f6388 JA |
3537 | } |
3538 | else if (job_control) | |
3539 | { | |
28ef6c31 | 3540 | old_tstp = set_signal_handler (SIGTSTP, sigstop_sighandler); |
28ef6c31 | 3541 | old_ttin = set_signal_handler (SIGTTIN, sigstop_sighandler); |
7117c2d2 | 3542 | old_ttou = set_signal_handler (SIGTTOU, sigstop_sighandler); |
726f6388 JA |
3543 | } |
3544 | /* Leave these things alone for non-interactive shells without job | |
3545 | control. */ | |
3546 | } | |
3547 | ||
3548 | /* Here we handle CONT signals. */ | |
3549 | static sighandler | |
28ef6c31 | 3550 | sigcont_sighandler (sig) |
726f6388 JA |
3551 | int sig; |
3552 | { | |
3553 | initialize_job_signals (); | |
3554 | set_signal_handler (SIGCONT, old_cont); | |
3555 | kill (getpid (), SIGCONT); | |
3556 | ||
ccc6cda3 | 3557 | SIGRETURN (0); |
726f6388 JA |
3558 | } |
3559 | ||
3560 | /* Here we handle stop signals while we are running not as a login shell. */ | |
3561 | static sighandler | |
28ef6c31 | 3562 | sigstop_sighandler (sig) |
726f6388 JA |
3563 | int sig; |
3564 | { | |
3565 | set_signal_handler (SIGTSTP, old_tstp); | |
3566 | set_signal_handler (SIGTTOU, old_ttou); | |
3567 | set_signal_handler (SIGTTIN, old_ttin); | |
3568 | ||
28ef6c31 | 3569 | old_cont = set_signal_handler (SIGCONT, sigcont_sighandler); |
726f6388 | 3570 | |
28ef6c31 | 3571 | give_terminal_to (shell_pgrp, 0); |
726f6388 JA |
3572 | |
3573 | kill (getpid (), sig); | |
3574 | ||
ccc6cda3 | 3575 | SIGRETURN (0); |
726f6388 JA |
3576 | } |
3577 | ||
3578 | /* Give the terminal to PGRP. */ | |
ccc6cda3 | 3579 | int |
28ef6c31 | 3580 | give_terminal_to (pgrp, force) |
726f6388 | 3581 | pid_t pgrp; |
28ef6c31 | 3582 | int force; |
726f6388 JA |
3583 | { |
3584 | sigset_t set, oset; | |
ccc6cda3 | 3585 | int r; |
726f6388 | 3586 | |
ccc6cda3 | 3587 | r = 0; |
28ef6c31 | 3588 | if (job_control || force) |
726f6388 JA |
3589 | { |
3590 | sigemptyset (&set); | |
3591 | sigaddset (&set, SIGTTOU); | |
3592 | sigaddset (&set, SIGTTIN); | |
3593 | sigaddset (&set, SIGTSTP); | |
3594 | sigaddset (&set, SIGCHLD); | |
3595 | sigemptyset (&oset); | |
3596 | sigprocmask (SIG_BLOCK, &set, &oset); | |
3597 | ||
3598 | if (tcsetpgrp (shell_tty, pgrp) < 0) | |
3599 | { | |
3600 | /* Maybe we should print an error message? */ | |
ccc6cda3 | 3601 | #if 0 |
f73dda09 JA |
3602 | sys_error ("tcsetpgrp(%d) failed: pid %ld to pgrp %ld", |
3603 | shell_tty, (long)getpid(), (long)pgrp); | |
ccc6cda3 | 3604 | #endif |
726f6388 JA |
3605 | r = -1; |
3606 | } | |
3607 | else | |
3608 | terminal_pgrp = pgrp; | |
726f6388 JA |
3609 | sigprocmask (SIG_SETMASK, &oset, (sigset_t *)NULL); |
3610 | } | |
3611 | ||
3612 | return r; | |
3613 | } | |
3614 | ||
3615 | /* Clear out any jobs in the job array. This is intended to be used by | |
3616 | children of the shell, who should not have any job structures as baggage | |
3617 | when they start executing (forking subshells for parenthesized execution | |
cce855bc JA |
3618 | and functions with pipes are the two that spring to mind). If RUNNING_ONLY |
3619 | is nonzero, only running jobs are removed from the table. */ | |
d166f048 | 3620 | void |
cce855bc JA |
3621 | delete_all_jobs (running_only) |
3622 | int running_only; | |
726f6388 JA |
3623 | { |
3624 | register int i; | |
3625 | sigset_t set, oset; | |
3626 | ||
ccc6cda3 JA |
3627 | BLOCK_CHILD (set, oset); |
3628 | ||
95732b49 JA |
3629 | /* XXX - need to set j_lastj, j_firstj appropriately if running_only != 0. */ |
3630 | if (js.j_jobslots) | |
726f6388 | 3631 | { |
95732b49 | 3632 | js.j_current = js.j_previous = NO_JOB; |
726f6388 | 3633 | |
95732b49 JA |
3634 | /* XXX could use js.j_firstj here */ |
3635 | for (i = 0; i < js.j_jobslots; i++) | |
3636 | { | |
3637 | #if defined (DEBUG) | |
3638 | if (i < js.j_firstj && jobs[i]) | |
3639 | itrace("delete_all_jobs: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
3640 | #endif | |
3641 | if (jobs[i] && (running_only == 0 || (running_only && RUNNING(i)))) | |
3642 | delete_job (i, 1); | |
3643 | } | |
cce855bc JA |
3644 | if (running_only == 0) |
3645 | { | |
3646 | free ((char *)jobs); | |
95732b49 JA |
3647 | js.j_jobslots = 0; |
3648 | js.j_firstj = js.j_lastj = js.j_njobs = 0; | |
cce855bc | 3649 | } |
726f6388 | 3650 | } |
ccc6cda3 | 3651 | |
95732b49 JA |
3652 | if (running_only == 0) |
3653 | bgp_clear (); | |
3654 | ||
ccc6cda3 | 3655 | UNBLOCK_CHILD (oset); |
726f6388 JA |
3656 | } |
3657 | ||
d166f048 | 3658 | /* Mark all jobs in the job array so that they don't get a SIGHUP when the |
cce855bc | 3659 | shell gets one. If RUNNING_ONLY is nonzero, mark only running jobs. */ |
d166f048 | 3660 | void |
cce855bc JA |
3661 | nohup_all_jobs (running_only) |
3662 | int running_only; | |
d166f048 JA |
3663 | { |
3664 | register int i; | |
3665 | sigset_t set, oset; | |
3666 | ||
3667 | BLOCK_CHILD (set, oset); | |
3668 | ||
95732b49 | 3669 | if (js.j_jobslots) |
d166f048 | 3670 | { |
95732b49 JA |
3671 | /* XXX could use js.j_firstj here */ |
3672 | for (i = 0; i < js.j_jobslots; i++) | |
cce855bc | 3673 | if (jobs[i] && (running_only == 0 || (running_only && RUNNING(i)))) |
d166f048 JA |
3674 | nohup_job (i); |
3675 | } | |
3676 | ||
3677 | UNBLOCK_CHILD (oset); | |
3678 | } | |
3679 | ||
bb70624e JA |
3680 | int |
3681 | count_all_jobs () | |
3682 | { | |
3683 | int i, n; | |
3684 | sigset_t set, oset; | |
3685 | ||
95732b49 | 3686 | /* This really counts all non-dead jobs. */ |
bb70624e | 3687 | BLOCK_CHILD (set, oset); |
95732b49 JA |
3688 | /* XXX could use js.j_firstj here */ |
3689 | for (i = n = 0; i < js.j_jobslots; i++) | |
3690 | { | |
3691 | #if defined (DEBUG) | |
3692 | if (i < js.j_firstj && jobs[i]) | |
3693 | itrace("count_all_jobs: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
3694 | #endif | |
3695 | if (jobs[i] && DEADJOB(i) == 0) | |
3696 | n++; | |
3697 | } | |
bb70624e JA |
3698 | UNBLOCK_CHILD (oset); |
3699 | return n; | |
3700 | } | |
3701 | ||
3702 | static void | |
3703 | mark_all_jobs_as_dead () | |
3704 | { | |
3705 | register int i; | |
3706 | sigset_t set, oset; | |
3707 | ||
95732b49 | 3708 | if (js.j_jobslots == 0) |
7117c2d2 | 3709 | return; |
bb70624e | 3710 | |
7117c2d2 | 3711 | BLOCK_CHILD (set, oset); |
bb70624e | 3712 | |
95732b49 JA |
3713 | /* XXX could use js.j_firstj here */ |
3714 | for (i = 0; i < js.j_jobslots; i++) | |
7117c2d2 | 3715 | if (jobs[i]) |
95732b49 JA |
3716 | { |
3717 | jobs[i]->state = JDEAD; | |
3718 | js.j_ndead++; | |
3719 | } | |
7117c2d2 JA |
3720 | |
3721 | UNBLOCK_CHILD (oset); | |
bb70624e JA |
3722 | } |
3723 | ||
726f6388 | 3724 | /* Mark all dead jobs as notified, so delete_job () cleans them out |
b72432fd JA |
3725 | of the job table properly. POSIX.2 says we need to save the |
3726 | status of the last CHILD_MAX jobs, so we count the number of dead | |
3727 | jobs and mark only enough as notified to save CHILD_MAX statuses. */ | |
726f6388 | 3728 | static void |
b72432fd JA |
3729 | mark_dead_jobs_as_notified (force) |
3730 | int force; | |
726f6388 | 3731 | { |
95732b49 | 3732 | register int i, ndead, ndeadproc; |
726f6388 JA |
3733 | sigset_t set, oset; |
3734 | ||
95732b49 | 3735 | if (js.j_jobslots == 0) |
7117c2d2 | 3736 | return; |
b72432fd | 3737 | |
7117c2d2 | 3738 | BLOCK_CHILD (set, oset); |
b72432fd | 3739 | |
7117c2d2 JA |
3740 | /* If FORCE is non-zero, we don't have to keep CHILD_MAX statuses |
3741 | around; just run through the array. */ | |
3742 | if (force) | |
3743 | { | |
95732b49 JA |
3744 | /* XXX could use js.j_firstj here */ |
3745 | for (i = 0; i < js.j_jobslots; i++) | |
28ef6c31 | 3746 | { |
7117c2d2 JA |
3747 | if (jobs[i] && DEADJOB (i) && (interactive_shell || (find_last_pid (i, 0) != last_asynchronous_pid))) |
3748 | jobs[i]->flags |= J_NOTIFIED; | |
28ef6c31 | 3749 | } |
7117c2d2 JA |
3750 | UNBLOCK_CHILD (oset); |
3751 | return; | |
3752 | } | |
3753 | ||
95732b49 JA |
3754 | /* Mark enough dead jobs as notified to keep CHILD_MAX processes left in the |
3755 | array with the corresponding not marked as notified. This is a better | |
3756 | way to avoid pid aliasing and reuse problems than keeping the POSIX- | |
3757 | mandated CHILD_MAX jobs around. delete_job() takes care of keeping the | |
3758 | bgpids list regulated. */ | |
7117c2d2 JA |
3759 | |
3760 | /* Count the number of dead jobs */ | |
95732b49 JA |
3761 | /* XXX could use js.j_firstj here */ |
3762 | for (i = ndead = ndeadproc = 0; i < js.j_jobslots; i++) | |
7117c2d2 | 3763 | { |
95732b49 JA |
3764 | #if defined (DEBUG) |
3765 | if (i < js.j_firstj && jobs[i]) | |
3766 | itrace("mark_dead_jobs_as_notified: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
3767 | #endif | |
7117c2d2 | 3768 | if (jobs[i] && DEADJOB (i)) |
95732b49 JA |
3769 | { |
3770 | ndead++; | |
3771 | ndeadproc += processes_in_job (i); | |
3772 | } | |
7117c2d2 JA |
3773 | } |
3774 | ||
95732b49 JA |
3775 | #ifdef DEBUG |
3776 | if (ndeadproc != js.c_reaped) | |
3777 | itrace("mark_dead_jobs_as_notified: ndeadproc (%d) != js.c_reaped (%d)", ndeadproc, js.c_reaped); | |
3778 | if (ndead != js.j_ndead) | |
3779 | itrace("mark_dead_jobs_as_notified: ndead (%d) != js.j_ndead (%d)", ndead, js.j_ndead); | |
3780 | #endif | |
3781 | ||
3782 | if (js.c_childmax < 0) | |
3783 | js.c_childmax = getmaxchild (); | |
3784 | if (js.c_childmax < 0) | |
3785 | js.c_childmax = DEFAULT_CHILD_MAX; | |
726f6388 | 3786 | |
95732b49 JA |
3787 | /* Don't do anything if the number of dead processes is less than CHILD_MAX |
3788 | and we're not forcing a cleanup. */ | |
3789 | if (ndeadproc <= js.c_childmax) | |
7117c2d2 | 3790 | { |
726f6388 | 3791 | UNBLOCK_CHILD (oset); |
7117c2d2 | 3792 | return; |
726f6388 | 3793 | } |
7117c2d2 | 3794 | |
95732b49 JA |
3795 | #if 0 |
3796 | itrace("mark_dead_jobs_as_notified: child_max = %d ndead = %d ndeadproc = %d", js.c_childmax, ndead, ndeadproc); | |
3797 | #endif | |
3798 | ||
7117c2d2 JA |
3799 | /* Mark enough dead jobs as notified that we keep CHILD_MAX jobs in |
3800 | the list. This isn't exactly right yet; changes need to be made | |
3801 | to stop_pipeline so we don't mark the newer jobs after we've | |
95732b49 JA |
3802 | created CHILD_MAX slots in the jobs array. This needs to be |
3803 | integrated with a way to keep the jobs array from growing without | |
3804 | bound. Maybe we wrap back around to 0 after we reach some max | |
3805 | limit, and there are sufficient job slots free (keep track of total | |
3806 | size of jobs array (js.j_jobslots) and running count of number of jobs | |
3807 | in jobs array. Then keep a job index corresponding to the `oldest job' | |
3808 | and start this loop there, wrapping around as necessary. In effect, | |
3809 | we turn the list into a circular buffer. */ | |
3810 | /* XXX could use js.j_firstj here */ | |
3811 | for (i = 0; i < js.j_jobslots; i++) | |
7117c2d2 JA |
3812 | { |
3813 | if (jobs[i] && DEADJOB (i) && (interactive_shell || (find_last_pid (i, 0) != last_asynchronous_pid))) | |
3814 | { | |
95732b49 JA |
3815 | #if defined (DEBUG) |
3816 | if (i < js.j_firstj && jobs[i]) | |
3817 | itrace("mark_dead_jobs_as_notified: job %d non-null before js.j_firstj (%d)", i, js.j_firstj); | |
3818 | #endif | |
3819 | /* If marking this job as notified would drop us down below | |
3820 | child_max, don't mark it so we can keep at least child_max | |
3821 | statuses. XXX -- need to check what Posix actually says | |
3822 | about keeping statuses. */ | |
3823 | if ((ndeadproc -= processes_in_job (i)) <= js.c_childmax) | |
7117c2d2 | 3824 | break; |
95732b49 | 3825 | jobs[i]->flags |= J_NOTIFIED; |
7117c2d2 JA |
3826 | } |
3827 | } | |
3828 | ||
3829 | UNBLOCK_CHILD (oset); | |
726f6388 JA |
3830 | } |
3831 | ||
ccc6cda3 JA |
3832 | /* Here to allow other parts of the shell (like the trap stuff) to |
3833 | unfreeze the jobs list. */ | |
3834 | void | |
3835 | unfreeze_jobs_list () | |
3836 | { | |
3837 | jobs_list_frozen = 0; | |
3838 | } | |
3839 | ||
726f6388 JA |
3840 | /* Allow or disallow job control to take place. Returns the old value |
3841 | of job_control. */ | |
3842 | int | |
3843 | set_job_control (arg) | |
3844 | int arg; | |
3845 | { | |
3846 | int old; | |
3847 | ||
3848 | old = job_control; | |
3849 | job_control = arg; | |
b80f6443 JA |
3850 | |
3851 | /* If we're turning on job control, reset pipeline_pgrp so make_child will | |
3852 | put new child processes into the right pgrp */ | |
3853 | if (job_control != old && job_control) | |
3854 | pipeline_pgrp = 0; | |
3855 | ||
726f6388 JA |
3856 | return (old); |
3857 | } | |
3858 | ||
3859 | /* Turn off all traces of job control. This is run by children of the shell | |
3860 | which are going to do shellsy things, like wait (), etc. */ | |
3861 | void | |
3862 | without_job_control () | |
3863 | { | |
3864 | stop_making_children (); | |
3865 | start_pipeline (); | |
95732b49 JA |
3866 | #if defined (PGRP_PIPE) |
3867 | pipe_close (pgrp_pipe); | |
3868 | #endif | |
cce855bc | 3869 | delete_all_jobs (0); |
726f6388 JA |
3870 | set_job_control (0); |
3871 | } | |
3872 | ||
3873 | /* If this shell is interactive, terminate all stopped jobs and | |
3874 | restore the original terminal process group. This is done | |
3875 | before the `exec' builtin calls shell_execve. */ | |
3876 | void | |
3877 | end_job_control () | |
3878 | { | |
3879 | if (interactive_shell) /* XXX - should it be interactive? */ | |
3880 | { | |
3881 | terminate_stopped_jobs (); | |
3882 | ||
3883 | if (original_pgrp >= 0) | |
28ef6c31 | 3884 | give_terminal_to (original_pgrp, 1); |
726f6388 JA |
3885 | } |
3886 | ||
3887 | if (original_pgrp >= 0) | |
3888 | setpgid (0, original_pgrp); | |
3889 | } | |
3890 | ||
3891 | /* Restart job control by closing shell tty and reinitializing. This is | |
3892 | called after an exec fails in an interactive shell and we do not exit. */ | |
3893 | void | |
3894 | restart_job_control () | |
3895 | { | |
3896 | if (shell_tty != -1) | |
3897 | close (shell_tty); | |
d166f048 | 3898 | initialize_job_control (0); |
726f6388 JA |
3899 | } |
3900 | ||
3901 | /* Set the handler to run when the shell receives a SIGCHLD signal. */ | |
3902 | void | |
3903 | set_sigchld_handler () | |
3904 | { | |
ccc6cda3 | 3905 | set_signal_handler (SIGCHLD, sigchld_handler); |
726f6388 JA |
3906 | } |
3907 | ||
3908 | #if defined (PGRP_PIPE) | |
3909 | /* Read from the read end of a pipe. This is how the process group leader | |
3910 | blocks until all of the processes in a pipeline have been made. */ | |
3911 | static void | |
3912 | pipe_read (pp) | |
3913 | int *pp; | |
3914 | { | |
3915 | char ch; | |
3916 | ||
3917 | if (pp[1] >= 0) | |
3918 | { | |
3919 | close (pp[1]); | |
3920 | pp[1] = -1; | |
3921 | } | |
3922 | ||
3923 | if (pp[0] >= 0) | |
3924 | { | |
3925 | while (read (pp[0], &ch, 1) == -1 && errno == EINTR) | |
bb70624e | 3926 | ; |
726f6388 JA |
3927 | } |
3928 | } | |
3929 | ||
3930 | /* Close the read and write ends of PP, an array of file descriptors. */ | |
3931 | static void | |
3932 | pipe_close (pp) | |
3933 | int *pp; | |
3934 | { | |
3935 | if (pp[0] >= 0) | |
3936 | close (pp[0]); | |
3937 | ||
3938 | if (pp[1] >= 0) | |
3939 | close (pp[1]); | |
3940 | ||
3941 | pp[0] = pp[1] = -1; | |
3942 | } | |
3943 | ||
3944 | /* Functional interface closes our local-to-job-control pipes. */ | |
ccc6cda3 | 3945 | void |
726f6388 JA |
3946 | close_pgrp_pipe () |
3947 | { | |
3948 | pipe_close (pgrp_pipe); | |
3949 | } | |
3950 | ||
3951 | #endif /* PGRP_PIPE */ |