Commit | Line | Data |
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984263bc MD |
1 | /*- |
2 | * Copyright (c) 1991, 1993 | |
3 | * The Regents of the University of California. All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Kenneth Almquist. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
69763be3 | 16 | * 3. Neither the name of the University nor the names of its contributors |
984263bc MD |
17 | * may be used to endorse or promote products derived from this software |
18 | * without specific prior written permission. | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
30 | * SUCH DAMAGE. | |
31 | */ | |
32 | ||
02d0b1ce MD |
33 | #ifndef lint |
34 | #if 0 | |
35 | static char sccsid[] = "@(#)jobs.c 8.5 (Berkeley) 5/4/95"; | |
36 | #endif | |
37 | #endif /* not lint */ | |
38 | #include <sys/cdefs.h> | |
39 | __FBSDID("$FreeBSD$"); | |
40 | ||
99512ac4 | 41 | #include <sys/ioctl.h> |
984263bc | 42 | #include <sys/param.h> |
984263bc | 43 | #include <sys/resource.h> |
99512ac4 PA |
44 | #include <sys/time.h> |
45 | #include <sys/wait.h> | |
46 | #include <errno.h> | |
47 | #include <fcntl.h> | |
984263bc | 48 | #include <paths.h> |
99512ac4 PA |
49 | #include <signal.h> |
50 | #include <stddef.h> | |
51 | #include <stdlib.h> | |
52 | #include <unistd.h> | |
984263bc MD |
53 | |
54 | #include "shell.h" | |
55 | #if JOBS | |
56 | #include <termios.h> | |
57 | #undef CEOF /* syntax.h redefines this */ | |
58 | #endif | |
59 | #include "redir.h" | |
3fb5edd5 | 60 | #include "exec.h" |
984263bc MD |
61 | #include "show.h" |
62 | #include "main.h" | |
63 | #include "parser.h" | |
64 | #include "nodes.h" | |
65 | #include "jobs.h" | |
66 | #include "options.h" | |
67 | #include "trap.h" | |
68 | #include "syntax.h" | |
69 | #include "input.h" | |
70 | #include "output.h" | |
71 | #include "memalloc.h" | |
72 | #include "error.h" | |
73 | #include "mystring.h" | |
32931063 | 74 | #include "var.h" |
c3e3bc7a | 75 | #include "builtins.h" |
984263bc MD |
76 | |
77 | ||
99512ac4 PA |
78 | static struct job *jobtab; /* array of jobs */ |
79 | static int njobs; /* size of array */ | |
b1abb130 PA |
80 | static pid_t backgndpid = -1; /* pid of last background process */ |
81 | static struct job *bgjob = NULL; /* last background process */ | |
984263bc | 82 | #if JOBS |
99512ac4 PA |
83 | static struct job *jobmru; /* most recently used job list */ |
84 | static pid_t initialpgrp; /* pgrp of shell on invocation */ | |
984263bc | 85 | #endif |
984263bc MD |
86 | static int ttyfd = -1; |
87 | ||
f00eae14 PA |
88 | /* mode flags for dowait */ |
89 | #define DOWAIT_BLOCK 0x1 /* wait until a child exits */ | |
02d0b1ce MD |
90 | #define DOWAIT_SIG 0x2 /* if DOWAIT_BLOCK, abort on signal */ |
91 | #define DOWAIT_SIG_TRAP 0x4 /* if DOWAIT_SIG, abort on trapped signal only */ | |
f00eae14 | 92 | |
984263bc | 93 | #if JOBS |
99512ac4 | 94 | static void restartjob(struct job *); |
984263bc | 95 | #endif |
99512ac4 | 96 | static void freejob(struct job *); |
b1abb130 | 97 | static int waitcmdloop(struct job *); |
02d0b1ce MD |
98 | static struct job *getjob_nonotfound(const char *); |
99 | static struct job *getjob(const char *); | |
100 | pid_t killjob(const char *, int); | |
99512ac4 | 101 | static pid_t dowait(int, struct job *); |
99512ac4 PA |
102 | static void checkzombies(void); |
103 | static void cmdtxt(union node *); | |
104 | static void cmdputs(const char *); | |
984263bc | 105 | #if JOBS |
99512ac4 PA |
106 | static void setcurjob(struct job *); |
107 | static void deljob(struct job *); | |
108 | static struct job *getcurjob(struct job *); | |
984263bc | 109 | #endif |
99512ac4 PA |
110 | static void printjobcmd(struct job *); |
111 | static void showjob(struct job *, int); | |
984263bc MD |
112 | |
113 | ||
114 | /* | |
115 | * Turn job control on and off. | |
116 | */ | |
117 | ||
b1abb130 | 118 | static int jobctl; |
984263bc MD |
119 | |
120 | #if JOBS | |
02d0b1ce MD |
121 | static void |
122 | jobctl_notty(void) | |
123 | { | |
124 | if (ttyfd >= 0) { | |
125 | close(ttyfd); | |
126 | ttyfd = -1; | |
127 | } | |
128 | if (!iflag) { | |
129 | setsignal(SIGTSTP); | |
130 | setsignal(SIGTTOU); | |
131 | setsignal(SIGTTIN); | |
132 | jobctl = 1; | |
133 | return; | |
134 | } | |
135 | out2fmt_flush("sh: can't access tty; job control turned off\n"); | |
136 | mflag = 0; | |
137 | } | |
138 | ||
984263bc MD |
139 | void |
140 | setjobctl(int on) | |
141 | { | |
142 | int i; | |
143 | ||
144 | if (on == jobctl || rootshell == 0) | |
145 | return; | |
146 | if (on) { | |
147 | if (ttyfd != -1) | |
148 | close(ttyfd); | |
edd35de3 | 149 | if ((ttyfd = open(_PATH_TTY, O_RDWR | O_CLOEXEC_MAYBE)) < 0) { |
984263bc MD |
150 | i = 0; |
151 | while (i <= 2 && !isatty(i)) | |
152 | i++; | |
b1abb130 | 153 | if (i > 2 || |
edd35de3 | 154 | (ttyfd = fcntl(i, F_DUPFD_CLOEXEC_MAYBE, 10)) < 0) { |
02d0b1ce MD |
155 | jobctl_notty(); |
156 | return; | |
157 | } | |
984263bc MD |
158 | } |
159 | if (ttyfd < 10) { | |
160 | /* | |
161 | * Keep our TTY file descriptor out of the way of | |
162 | * the user's redirections. | |
163 | */ | |
edd35de3 | 164 | if ((i = fcntl(ttyfd, F_DUPFD_CLOEXEC_MAYBE, 10)) < 0) { |
02d0b1ce MD |
165 | jobctl_notty(); |
166 | return; | |
984263bc MD |
167 | } |
168 | close(ttyfd); | |
169 | ttyfd = i; | |
170 | } | |
edd35de3 MD |
171 | #if !defined(O_CLOEXEC) || !defined(F_DUPFD_CLOEXEC) |
172 | if (fcntl(ttyfd, F_SETFD, FD_CLOEXEC) < 0) { | |
173 | close(ttyfd); | |
174 | ttyfd = -1; | |
175 | goto out; | |
176 | } | |
177 | #endif | |
984263bc MD |
178 | do { /* while we are in the background */ |
179 | initialpgrp = tcgetpgrp(ttyfd); | |
180 | if (initialpgrp < 0) { | |
5d51e906 MD |
181 | #if !defined(O_CLOEXEC) || !defined(F_DUPFD_CLOEXEC) |
182 | out: | |
183 | #endif | |
184 | jobctl_notty(); | |
984263bc MD |
185 | return; |
186 | } | |
99512ac4 | 187 | if (initialpgrp != getpgrp()) { |
02d0b1ce MD |
188 | if (!iflag) { |
189 | initialpgrp = -1; | |
190 | jobctl_notty(); | |
191 | return; | |
192 | } | |
99512ac4 | 193 | kill(0, SIGTTIN); |
984263bc MD |
194 | continue; |
195 | } | |
196 | } while (0); | |
197 | setsignal(SIGTSTP); | |
198 | setsignal(SIGTTOU); | |
199 | setsignal(SIGTTIN); | |
200 | setpgid(0, rootpid); | |
201 | tcsetpgrp(ttyfd, rootpid); | |
202 | } else { /* turning job control off */ | |
203 | setpgid(0, initialpgrp); | |
02d0b1ce | 204 | if (ttyfd >= 0) { |
984263bc MD |
205 | tcsetpgrp(ttyfd, initialpgrp); |
206 | close(ttyfd); | |
207 | ttyfd = -1; | |
02d0b1ce | 208 | } |
984263bc MD |
209 | setsignal(SIGTSTP); |
210 | setsignal(SIGTTOU); | |
211 | setsignal(SIGTTIN); | |
212 | } | |
213 | jobctl = on; | |
214 | } | |
215 | #endif | |
216 | ||
217 | ||
984263bc MD |
218 | #if JOBS |
219 | int | |
02d0b1ce | 220 | fgcmd(int argc __unused, char **argv __unused) |
984263bc MD |
221 | { |
222 | struct job *jp; | |
223 | pid_t pgrp; | |
224 | int status; | |
225 | ||
02d0b1ce MD |
226 | nextopt(""); |
227 | jp = getjob(*argptr); | |
984263bc MD |
228 | if (jp->jobctl == 0) |
229 | error("job not created under job control"); | |
99512ac4 | 230 | printjobcmd(jp); |
984263bc MD |
231 | flushout(&output); |
232 | pgrp = jp->ps[0].pid; | |
02d0b1ce | 233 | if (ttyfd >= 0) |
984263bc MD |
234 | tcsetpgrp(ttyfd, pgrp); |
235 | restartjob(jp); | |
236 | jp->foreground = 1; | |
237 | INTOFF; | |
02d0b1ce | 238 | status = waitforjob(jp, (int *)NULL); |
984263bc MD |
239 | INTON; |
240 | return status; | |
241 | } | |
242 | ||
243 | ||
244 | int | |
02d0b1ce | 245 | bgcmd(int argc __unused, char **argv __unused) |
984263bc | 246 | { |
984263bc MD |
247 | struct job *jp; |
248 | ||
02d0b1ce | 249 | nextopt(""); |
984263bc | 250 | do { |
02d0b1ce | 251 | jp = getjob(*argptr); |
984263bc MD |
252 | if (jp->jobctl == 0) |
253 | error("job not created under job control"); | |
254 | if (jp->state == JOBDONE) | |
255 | continue; | |
256 | restartjob(jp); | |
257 | jp->foreground = 0; | |
99512ac4 PA |
258 | out1fmt("[%td] ", jp - jobtab + 1); |
259 | printjobcmd(jp); | |
02d0b1ce | 260 | } while (*argptr != NULL && *++argptr != NULL); |
984263bc MD |
261 | return 0; |
262 | } | |
263 | ||
264 | ||
99512ac4 | 265 | static void |
984263bc MD |
266 | restartjob(struct job *jp) |
267 | { | |
268 | struct procstat *ps; | |
269 | int i; | |
270 | ||
271 | if (jp->state == JOBDONE) | |
272 | return; | |
273 | setcurjob(jp); | |
274 | INTOFF; | |
99512ac4 | 275 | kill(-jp->ps[0].pid, SIGCONT); |
984263bc MD |
276 | for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { |
277 | if (WIFSTOPPED(ps->status)) { | |
278 | ps->status = -1; | |
279 | jp->state = 0; | |
280 | } | |
281 | } | |
282 | INTON; | |
283 | } | |
284 | #endif | |
285 | ||
286 | ||
287 | int | |
f00eae14 | 288 | jobscmd(int argc __unused, char *argv[] __unused) |
984263bc MD |
289 | { |
290 | char *id; | |
9d7989de | 291 | int ch, mode; |
984263bc | 292 | |
9d7989de | 293 | mode = SHOWJOBS_DEFAULT; |
f00eae14 | 294 | while ((ch = nextopt("lps")) != '\0') { |
984263bc MD |
295 | switch (ch) { |
296 | case 'l': | |
9d7989de PA |
297 | mode = SHOWJOBS_VERBOSE; |
298 | break; | |
299 | case 'p': | |
300 | mode = SHOWJOBS_PGIDS; | |
984263bc MD |
301 | break; |
302 | case 's': | |
9d7989de | 303 | mode = SHOWJOBS_PIDS; |
984263bc | 304 | break; |
984263bc MD |
305 | } |
306 | } | |
984263bc | 307 | |
f00eae14 | 308 | if (*argptr == NULL) |
9d7989de | 309 | showjobs(0, mode); |
984263bc | 310 | else |
f00eae14 | 311 | while ((id = *argptr++) != NULL) |
99512ac4 | 312 | showjob(getjob(id), mode); |
984263bc MD |
313 | |
314 | return (0); | |
315 | } | |
316 | ||
99512ac4 PA |
317 | static void |
318 | printjobcmd(struct job *jp) | |
319 | { | |
320 | struct procstat *ps; | |
321 | int i; | |
322 | ||
323 | for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { | |
324 | out1str(ps->cmd); | |
325 | if (i > 0) | |
326 | out1str(" | "); | |
327 | } | |
328 | out1c('\n'); | |
329 | } | |
330 | ||
331 | static void | |
332 | showjob(struct job *jp, int mode) | |
984263bc MD |
333 | { |
334 | char s[64]; | |
99512ac4 | 335 | char statestr[64]; |
f00eae14 | 336 | const char *sigstr; |
984263bc MD |
337 | struct procstat *ps; |
338 | struct job *j; | |
339 | int col, curr, i, jobno, prev, procno; | |
340 | char c; | |
341 | ||
9d7989de | 342 | procno = (mode == SHOWJOBS_PGIDS) ? 1 : jp->nprocs; |
984263bc MD |
343 | jobno = jp - jobtab + 1; |
344 | curr = prev = 0; | |
345 | #if JOBS | |
346 | if ((j = getcurjob(NULL)) != NULL) { | |
347 | curr = j - jobtab + 1; | |
348 | if ((j = getcurjob(j)) != NULL) | |
349 | prev = j - jobtab + 1; | |
350 | } | |
351 | #endif | |
99512ac4 PA |
352 | ps = jp->ps + jp->nprocs - 1; |
353 | if (jp->state == 0) { | |
354 | strcpy(statestr, "Running"); | |
355 | #if JOBS | |
356 | } else if (jp->state == JOBSTOPPED) { | |
357 | while (!WIFSTOPPED(ps->status) && ps > jp->ps) | |
358 | ps--; | |
359 | if (WIFSTOPPED(ps->status)) | |
360 | i = WSTOPSIG(ps->status); | |
361 | else | |
362 | i = -1; | |
f00eae14 PA |
363 | sigstr = strsignal(i); |
364 | if (sigstr != NULL) | |
365 | strcpy(statestr, sigstr); | |
99512ac4 PA |
366 | else |
367 | strcpy(statestr, "Suspended"); | |
368 | #endif | |
369 | } else if (WIFEXITED(ps->status)) { | |
370 | if (WEXITSTATUS(ps->status) == 0) | |
371 | strcpy(statestr, "Done"); | |
372 | else | |
373 | fmtstr(statestr, 64, "Done(%d)", | |
374 | WEXITSTATUS(ps->status)); | |
375 | } else { | |
376 | i = WTERMSIG(ps->status); | |
f00eae14 PA |
377 | sigstr = strsignal(i); |
378 | if (sigstr != NULL) | |
379 | strcpy(statestr, sigstr); | |
99512ac4 | 380 | else |
f00eae14 | 381 | strcpy(statestr, "Unknown signal"); |
99512ac4 PA |
382 | if (WCOREDUMP(ps->status)) |
383 | strcat(statestr, " (core dumped)"); | |
384 | } | |
385 | ||
02d0b1ce | 386 | for (ps = jp->ps ; procno > 0 ; ps++, procno--) { /* for each process */ |
9d7989de | 387 | if (mode == SHOWJOBS_PIDS || mode == SHOWJOBS_PGIDS) { |
99512ac4 | 388 | out1fmt("%d\n", (int)ps->pid); |
02d0b1ce | 389 | continue; |
984263bc | 390 | } |
99512ac4 | 391 | if (mode != SHOWJOBS_VERBOSE && ps != jp->ps) |
02d0b1ce | 392 | continue; |
984263bc MD |
393 | if (jobno == curr && ps == jp->ps) |
394 | c = '+'; | |
395 | else if (jobno == prev && ps == jp->ps) | |
396 | c = '-'; | |
397 | else | |
398 | c = ' '; | |
399 | if (ps == jp->ps) | |
400 | fmtstr(s, 64, "[%d] %c ", jobno, c); | |
401 | else | |
402 | fmtstr(s, 64, " %c ", c); | |
403 | out1str(s); | |
404 | col = strlen(s); | |
9d7989de | 405 | if (mode == SHOWJOBS_VERBOSE) { |
984263bc MD |
406 | fmtstr(s, 64, "%d ", (int)ps->pid); |
407 | out1str(s); | |
408 | col += strlen(s); | |
409 | } | |
99512ac4 PA |
410 | if (ps == jp->ps) { |
411 | out1str(statestr); | |
412 | col += strlen(statestr); | |
984263bc | 413 | } |
984263bc MD |
414 | do { |
415 | out1c(' '); | |
416 | col++; | |
417 | } while (col < 30); | |
99512ac4 PA |
418 | if (mode == SHOWJOBS_VERBOSE) { |
419 | out1str(ps->cmd); | |
420 | out1c('\n'); | |
421 | } else | |
422 | printjobcmd(jp); | |
984263bc MD |
423 | } |
424 | } | |
425 | ||
426 | /* | |
427 | * Print a list of jobs. If "change" is nonzero, only print jobs whose | |
428 | * statuses have changed since the last call to showjobs. | |
429 | * | |
430 | * If the shell is interrupted in the process of creating a job, the | |
431 | * result may be a job structure containing zero processes. Such structures | |
432 | * will be freed here. | |
433 | */ | |
434 | ||
435 | void | |
9d7989de | 436 | showjobs(int change, int mode) |
984263bc MD |
437 | { |
438 | int jobno; | |
439 | struct job *jp; | |
440 | ||
441 | TRACE(("showjobs(%d) called\n", change)); | |
99512ac4 | 442 | checkzombies(); |
984263bc MD |
443 | for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) { |
444 | if (! jp->used) | |
445 | continue; | |
446 | if (jp->nprocs == 0) { | |
447 | freejob(jp); | |
448 | continue; | |
449 | } | |
450 | if (change && ! jp->changed) | |
451 | continue; | |
99512ac4 | 452 | showjob(jp, mode); |
b1abb130 PA |
453 | if (mode == SHOWJOBS_DEFAULT || mode == SHOWJOBS_VERBOSE) { |
454 | jp->changed = 0; | |
455 | /* Hack: discard jobs for which $! has not been | |
456 | * referenced in interactive mode when they terminate. | |
457 | */ | |
458 | if (jp->state == JOBDONE && !jp->remembered && | |
459 | (iflag || jp != bgjob)) { | |
460 | freejob(jp); | |
461 | } | |
984263bc MD |
462 | } |
463 | } | |
464 | } | |
465 | ||
466 | ||
467 | /* | |
468 | * Mark a job structure as unused. | |
469 | */ | |
470 | ||
99512ac4 | 471 | static void |
984263bc MD |
472 | freejob(struct job *jp) |
473 | { | |
474 | struct procstat *ps; | |
475 | int i; | |
476 | ||
477 | INTOFF; | |
99512ac4 PA |
478 | if (bgjob == jp) |
479 | bgjob = NULL; | |
984263bc MD |
480 | for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { |
481 | if (ps->cmd != nullstr) | |
482 | ckfree(ps->cmd); | |
483 | } | |
484 | if (jp->ps != &jp->ps0) | |
485 | ckfree(jp->ps); | |
486 | jp->used = 0; | |
487 | #if JOBS | |
488 | deljob(jp); | |
489 | #endif | |
490 | INTON; | |
491 | } | |
492 | ||
493 | ||
494 | ||
495 | int | |
b1abb130 | 496 | waitcmd(int argc __unused, char **argv __unused) |
984263bc MD |
497 | { |
498 | struct job *job; | |
b1abb130 PA |
499 | int retval; |
500 | ||
501 | nextopt(""); | |
502 | if (*argptr == NULL) | |
503 | return (waitcmdloop(NULL)); | |
504 | ||
505 | do { | |
506 | job = getjob_nonotfound(*argptr); | |
507 | if (job == NULL) | |
508 | retval = 127; | |
509 | else | |
510 | retval = waitcmdloop(job); | |
511 | argptr++; | |
512 | } while (*argptr != NULL); | |
513 | ||
514 | return (retval); | |
515 | } | |
516 | ||
517 | static int | |
518 | waitcmdloop(struct job *job) | |
519 | { | |
02d0b1ce | 520 | int status, retval, sig; |
984263bc MD |
521 | struct job *jp; |
522 | ||
984263bc MD |
523 | /* |
524 | * Loop until a process is terminated or stopped, or a SIGINT is | |
525 | * received. | |
526 | */ | |
527 | ||
984263bc MD |
528 | do { |
529 | if (job != NULL) { | |
02d0b1ce | 530 | if (job->state == JOBDONE) { |
984263bc MD |
531 | status = job->ps[job->nprocs - 1].status; |
532 | if (WIFEXITED(status)) | |
533 | retval = WEXITSTATUS(status); | |
984263bc MD |
534 | else |
535 | retval = WTERMSIG(status) + 128; | |
99512ac4 | 536 | if (! iflag || ! job->changed) |
984263bc | 537 | freejob(job); |
99512ac4 PA |
538 | else { |
539 | job->remembered = 0; | |
540 | if (job == bgjob) | |
541 | bgjob = NULL; | |
542 | } | |
984263bc MD |
543 | return retval; |
544 | } | |
545 | } else { | |
99512ac4 PA |
546 | for (jp = jobtab ; jp < jobtab + njobs; jp++) |
547 | if (jp->used && jp->state == JOBDONE) { | |
548 | if (! iflag || ! jp->changed) | |
549 | freejob(jp); | |
550 | else { | |
551 | jp->remembered = 0; | |
552 | if (jp == bgjob) | |
553 | bgjob = NULL; | |
554 | } | |
555 | } | |
984263bc MD |
556 | for (jp = jobtab ; ; jp++) { |
557 | if (jp >= jobtab + njobs) { /* no running procs */ | |
984263bc MD |
558 | return 0; |
559 | } | |
560 | if (jp->used && jp->state == 0) | |
561 | break; | |
562 | } | |
563 | } | |
02d0b1ce | 564 | } while (dowait(DOWAIT_BLOCK | DOWAIT_SIG, (struct job *)NULL) != -1); |
984263bc | 565 | |
02d0b1ce MD |
566 | sig = pendingsig_waitcmd; |
567 | pendingsig_waitcmd = 0; | |
568 | return sig + 128; | |
984263bc MD |
569 | } |
570 | ||
571 | ||
572 | ||
573 | int | |
02d0b1ce | 574 | jobidcmd(int argc __unused, char **argv __unused) |
984263bc MD |
575 | { |
576 | struct job *jp; | |
577 | int i; | |
578 | ||
02d0b1ce MD |
579 | nextopt(""); |
580 | jp = getjob(*argptr); | |
984263bc MD |
581 | for (i = 0 ; i < jp->nprocs ; ) { |
582 | out1fmt("%d", (int)jp->ps[i].pid); | |
583 | out1c(++i < jp->nprocs? ' ' : '\n'); | |
584 | } | |
585 | return 0; | |
586 | } | |
587 | ||
588 | ||
589 | ||
590 | /* | |
591 | * Convert a job name to a job structure. | |
592 | */ | |
593 | ||
99512ac4 | 594 | static struct job * |
02d0b1ce | 595 | getjob_nonotfound(const char *name) |
984263bc MD |
596 | { |
597 | int jobno; | |
598 | struct job *found, *jp; | |
02d0b1ce | 599 | size_t namelen; |
984263bc MD |
600 | pid_t pid; |
601 | int i; | |
602 | ||
603 | if (name == NULL) { | |
604 | #if JOBS | |
02d0b1ce | 605 | name = "%+"; |
984263bc MD |
606 | #else |
607 | error("No current job"); | |
608 | #endif | |
02d0b1ce MD |
609 | } |
610 | if (name[0] == '%') { | |
984263bc MD |
611 | if (is_digit(name[1])) { |
612 | jobno = number(name + 1); | |
613 | if (jobno > 0 && jobno <= njobs | |
614 | && jobtab[jobno - 1].used != 0) | |
615 | return &jobtab[jobno - 1]; | |
616 | #if JOBS | |
02d0b1ce MD |
617 | } else if ((name[1] == '%' || name[1] == '+') && |
618 | name[2] == '\0') { | |
619 | if ((jp = getcurjob(NULL)) == NULL) | |
620 | error("No current job"); | |
621 | return (jp); | |
984263bc MD |
622 | } else if (name[1] == '-' && name[2] == '\0') { |
623 | if ((jp = getcurjob(NULL)) == NULL || | |
624 | (jp = getcurjob(jp)) == NULL) | |
625 | error("No previous job"); | |
626 | return (jp); | |
627 | #endif | |
628 | } else if (name[1] == '?') { | |
629 | found = NULL; | |
630 | for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { | |
631 | if (jp->used && jp->nprocs > 0 | |
632 | && strstr(jp->ps[0].cmd, name + 2) != NULL) { | |
633 | if (found) | |
634 | error("%s: ambiguous", name); | |
635 | found = jp; | |
636 | } | |
637 | } | |
638 | if (found != NULL) | |
639 | return (found); | |
640 | } else { | |
02d0b1ce | 641 | namelen = strlen(name); |
984263bc MD |
642 | found = NULL; |
643 | for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { | |
644 | if (jp->used && jp->nprocs > 0 | |
02d0b1ce MD |
645 | && strncmp(jp->ps[0].cmd, name + 1, |
646 | namelen - 1) == 0) { | |
984263bc MD |
647 | if (found) |
648 | error("%s: ambiguous", name); | |
649 | found = jp; | |
650 | } | |
651 | } | |
652 | if (found) | |
653 | return found; | |
654 | } | |
655 | } else if (is_number(name)) { | |
656 | pid = (pid_t)number(name); | |
657 | for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { | |
658 | if (jp->used && jp->nprocs > 0 | |
659 | && jp->ps[jp->nprocs - 1].pid == pid) | |
660 | return jp; | |
661 | } | |
662 | } | |
984263bc MD |
663 | return NULL; |
664 | } | |
665 | ||
666 | ||
b1abb130 | 667 | static struct job * |
02d0b1ce | 668 | getjob(const char *name) |
b1abb130 PA |
669 | { |
670 | struct job *jp; | |
671 | ||
672 | jp = getjob_nonotfound(name); | |
673 | if (jp == NULL) | |
674 | error("No such job: %s", name); | |
675 | return (jp); | |
676 | } | |
677 | ||
678 | ||
02d0b1ce MD |
679 | int |
680 | killjob(const char *name, int sig) | |
99512ac4 PA |
681 | { |
682 | struct job *jp; | |
02d0b1ce | 683 | int i, ret; |
99512ac4 PA |
684 | |
685 | jp = getjob(name); | |
02d0b1ce MD |
686 | if (jp->state == JOBDONE) |
687 | return 0; | |
688 | if (jp->jobctl) | |
689 | return kill(-jp->ps[0].pid, sig); | |
690 | ret = -1; | |
691 | errno = ESRCH; | |
692 | for (i = 0; i < jp->nprocs; i++) | |
693 | if (jp->ps[i].status == -1 || WIFSTOPPED(jp->ps[i].status)) { | |
694 | if (kill(jp->ps[i].pid, sig) == 0) | |
695 | ret = 0; | |
696 | } else | |
697 | ret = 0; | |
698 | return ret; | |
99512ac4 | 699 | } |
984263bc MD |
700 | |
701 | /* | |
702 | * Return a new job structure, | |
703 | */ | |
704 | ||
705 | struct job * | |
706 | makejob(union node *node __unused, int nprocs) | |
707 | { | |
708 | int i; | |
709 | struct job *jp; | |
710 | ||
711 | for (i = njobs, jp = jobtab ; ; jp++) { | |
712 | if (--i < 0) { | |
713 | INTOFF; | |
714 | if (njobs == 0) { | |
715 | jobtab = ckmalloc(4 * sizeof jobtab[0]); | |
716 | #if JOBS | |
717 | jobmru = NULL; | |
718 | #endif | |
719 | } else { | |
720 | jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); | |
721 | memcpy(jp, jobtab, njobs * sizeof jp[0]); | |
722 | #if JOBS | |
723 | /* Relocate `next' pointers and list head */ | |
724 | if (jobmru != NULL) | |
725 | jobmru = &jp[jobmru - jobtab]; | |
726 | for (i = 0; i < njobs; i++) | |
727 | if (jp[i].next != NULL) | |
728 | jp[i].next = &jp[jp[i].next - | |
729 | jobtab]; | |
730 | #endif | |
99512ac4 PA |
731 | if (bgjob != NULL) |
732 | bgjob = &jp[bgjob - jobtab]; | |
984263bc MD |
733 | /* Relocate `ps' pointers */ |
734 | for (i = 0; i < njobs; i++) | |
735 | if (jp[i].ps == &jobtab[i].ps0) | |
736 | jp[i].ps = &jp[i].ps0; | |
737 | ckfree(jobtab); | |
738 | jobtab = jp; | |
739 | } | |
740 | jp = jobtab + njobs; | |
b1abb130 PA |
741 | for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0) |
742 | ; | |
984263bc MD |
743 | INTON; |
744 | break; | |
745 | } | |
746 | if (jp->used == 0) | |
747 | break; | |
748 | } | |
749 | INTOFF; | |
750 | jp->state = 0; | |
751 | jp->used = 1; | |
752 | jp->changed = 0; | |
753 | jp->nprocs = 0; | |
754 | jp->foreground = 0; | |
99512ac4 | 755 | jp->remembered = 0; |
984263bc MD |
756 | #if JOBS |
757 | jp->jobctl = jobctl; | |
758 | jp->next = NULL; | |
759 | #endif | |
760 | if (nprocs > 1) { | |
761 | jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); | |
762 | } else { | |
763 | jp->ps = &jp->ps0; | |
764 | } | |
765 | INTON; | |
99512ac4 | 766 | TRACE(("makejob(%p, %d) returns %%%td\n", (void *)node, nprocs, |
984263bc MD |
767 | jp - jobtab + 1)); |
768 | return jp; | |
769 | } | |
770 | ||
771 | #if JOBS | |
99512ac4 | 772 | static void |
984263bc MD |
773 | setcurjob(struct job *cj) |
774 | { | |
775 | struct job *jp, *prev; | |
776 | ||
777 | for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { | |
778 | if (jp == cj) { | |
779 | if (prev != NULL) | |
780 | prev->next = jp->next; | |
781 | else | |
782 | jobmru = jp->next; | |
783 | jp->next = jobmru; | |
784 | jobmru = cj; | |
785 | return; | |
786 | } | |
787 | } | |
788 | cj->next = jobmru; | |
789 | jobmru = cj; | |
790 | } | |
791 | ||
99512ac4 | 792 | static void |
984263bc MD |
793 | deljob(struct job *j) |
794 | { | |
795 | struct job *jp, *prev; | |
796 | ||
797 | for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { | |
798 | if (jp == j) { | |
799 | if (prev != NULL) | |
800 | prev->next = jp->next; | |
801 | else | |
802 | jobmru = jp->next; | |
803 | return; | |
804 | } | |
805 | } | |
806 | } | |
807 | ||
808 | /* | |
809 | * Return the most recently used job that isn't `nj', and preferably one | |
810 | * that is stopped. | |
811 | */ | |
99512ac4 | 812 | static struct job * |
984263bc MD |
813 | getcurjob(struct job *nj) |
814 | { | |
815 | struct job *jp; | |
816 | ||
817 | /* Try to find a stopped one.. */ | |
818 | for (jp = jobmru; jp != NULL; jp = jp->next) | |
819 | if (jp->used && jp != nj && jp->state == JOBSTOPPED) | |
820 | return (jp); | |
821 | /* Otherwise the most recently used job that isn't `nj' */ | |
822 | for (jp = jobmru; jp != NULL; jp = jp->next) | |
823 | if (jp->used && jp != nj) | |
824 | return (jp); | |
825 | ||
826 | return (NULL); | |
827 | } | |
828 | ||
829 | #endif | |
830 | ||
831 | /* | |
832 | * Fork of a subshell. If we are doing job control, give the subshell its | |
833 | * own process group. Jp is a job structure that the job is to be added to. | |
834 | * N is the command that will be evaluated by the child. Both jp and n may | |
835 | * be NULL. The mode parameter can be one of the following: | |
836 | * FORK_FG - Fork off a foreground process. | |
837 | * FORK_BG - Fork off a background process. | |
838 | * FORK_NOJOB - Like FORK_FG, but don't give the process its own | |
839 | * process group even if job control is on. | |
840 | * | |
841 | * When job control is turned off, background processes have their standard | |
842 | * input redirected to /dev/null (except for the second and later processes | |
843 | * in a pipeline). | |
844 | */ | |
845 | ||
846 | pid_t | |
847 | forkshell(struct job *jp, union node *n, int mode) | |
848 | { | |
849 | pid_t pid; | |
850 | pid_t pgrp; | |
851 | ||
99512ac4 | 852 | TRACE(("forkshell(%%%td, %p, %d) called\n", jp - jobtab, (void *)n, |
984263bc MD |
853 | mode)); |
854 | INTOFF; | |
99512ac4 PA |
855 | if (mode == FORK_BG && (jp == NULL || jp->nprocs == 0)) |
856 | checkzombies(); | |
984263bc MD |
857 | flushall(); |
858 | pid = fork(); | |
859 | if (pid == -1) { | |
860 | TRACE(("Fork failed, errno=%d\n", errno)); | |
861 | INTON; | |
862 | error("Cannot fork: %s", strerror(errno)); | |
863 | } | |
864 | if (pid == 0) { | |
865 | struct job *p; | |
866 | int wasroot; | |
867 | int i; | |
868 | ||
869 | TRACE(("Child shell %d\n", (int)getpid())); | |
870 | wasroot = rootshell; | |
871 | rootshell = 0; | |
99512ac4 | 872 | handler = &main_handler; |
984263bc MD |
873 | closescript(); |
874 | INTON; | |
32931063 | 875 | forcelocal = 0; |
984263bc MD |
876 | clear_traps(); |
877 | #if JOBS | |
878 | jobctl = 0; /* do job control only in root shell */ | |
879 | if (wasroot && mode != FORK_NOJOB && mflag) { | |
880 | if (jp == NULL || jp->nprocs == 0) | |
881 | pgrp = getpid(); | |
882 | else | |
883 | pgrp = jp->ps[0].pid; | |
02d0b1ce MD |
884 | if (setpgid(0, pgrp) == 0 && mode == FORK_FG && |
885 | ttyfd >= 0) { | |
984263bc MD |
886 | /*** this causes superfluous TIOCSPGRPS ***/ |
887 | if (tcsetpgrp(ttyfd, pgrp) < 0) | |
888 | error("tcsetpgrp failed, errno=%d", errno); | |
889 | } | |
890 | setsignal(SIGTSTP); | |
891 | setsignal(SIGTTOU); | |
892 | } else if (mode == FORK_BG) { | |
893 | ignoresig(SIGINT); | |
894 | ignoresig(SIGQUIT); | |
895 | if ((jp == NULL || jp->nprocs == 0) && | |
896 | ! fd0_redirected_p ()) { | |
897 | close(0); | |
898 | if (open(_PATH_DEVNULL, O_RDONLY) != 0) | |
f893ef22 | 899 | error("cannot open %s: %s", |
984263bc MD |
900 | _PATH_DEVNULL, strerror(errno)); |
901 | } | |
902 | } | |
903 | #else | |
904 | if (mode == FORK_BG) { | |
905 | ignoresig(SIGINT); | |
906 | ignoresig(SIGQUIT); | |
907 | if ((jp == NULL || jp->nprocs == 0) && | |
908 | ! fd0_redirected_p ()) { | |
909 | close(0); | |
910 | if (open(_PATH_DEVNULL, O_RDONLY) != 0) | |
f893ef22 | 911 | error("cannot open %s: %s", |
984263bc MD |
912 | _PATH_DEVNULL, strerror(errno)); |
913 | } | |
914 | } | |
915 | #endif | |
916 | INTOFF; | |
917 | for (i = njobs, p = jobtab ; --i >= 0 ; p++) | |
918 | if (p->used) | |
919 | freejob(p); | |
920 | INTON; | |
921 | if (wasroot && iflag) { | |
922 | setsignal(SIGINT); | |
923 | setsignal(SIGQUIT); | |
924 | setsignal(SIGTERM); | |
925 | } | |
926 | return pid; | |
927 | } | |
928 | if (rootshell && mode != FORK_NOJOB && mflag) { | |
929 | if (jp == NULL || jp->nprocs == 0) | |
930 | pgrp = pid; | |
931 | else | |
932 | pgrp = jp->ps[0].pid; | |
933 | setpgid(pid, pgrp); | |
934 | } | |
99512ac4 PA |
935 | if (mode == FORK_BG) { |
936 | if (bgjob != NULL && bgjob->state == JOBDONE && | |
937 | !bgjob->remembered && !iflag) | |
938 | freejob(bgjob); | |
984263bc | 939 | backgndpid = pid; /* set $! */ |
99512ac4 PA |
940 | bgjob = jp; |
941 | } | |
984263bc MD |
942 | if (jp) { |
943 | struct procstat *ps = &jp->ps[jp->nprocs++]; | |
944 | ps->pid = pid; | |
945 | ps->status = -1; | |
946 | ps->cmd = nullstr; | |
947 | if (iflag && rootshell && n) | |
948 | ps->cmd = commandtext(n); | |
949 | jp->foreground = mode == FORK_FG; | |
950 | #if JOBS | |
951 | setcurjob(jp); | |
952 | #endif | |
953 | } | |
954 | INTON; | |
955 | TRACE(("In parent shell: child = %d\n", (int)pid)); | |
956 | return pid; | |
957 | } | |
958 | ||
959 | ||
3fb5edd5 PA |
960 | pid_t |
961 | vforkexecshell(struct job *jp, char **argv, char **envp, const char *path, int idx, int pip[2]) | |
962 | { | |
963 | pid_t pid; | |
964 | struct jmploc jmploc; | |
965 | struct jmploc *savehandler; | |
966 | ||
950caf74 PA |
967 | TRACE(("vforkexecshell(%%%td, %s, %p) called\n", jp - jobtab, argv[0], |
968 | (void *)pip)); | |
3fb5edd5 PA |
969 | INTOFF; |
970 | flushall(); | |
971 | savehandler = handler; | |
972 | pid = vfork(); | |
973 | if (pid == -1) { | |
974 | TRACE(("Vfork failed, errno=%d\n", errno)); | |
975 | INTON; | |
976 | error("Cannot fork: %s", strerror(errno)); | |
977 | } | |
978 | if (pid == 0) { | |
979 | TRACE(("Child shell %d\n", (int)getpid())); | |
980 | if (setjmp(jmploc.loc)) | |
981 | _exit(exception == EXEXEC ? exerrno : 2); | |
982 | if (pip != NULL) { | |
983 | close(pip[0]); | |
984 | if (pip[1] != 1) { | |
985 | dup2(pip[1], 1); | |
986 | close(pip[1]); | |
987 | } | |
988 | } | |
989 | handler = &jmploc; | |
990 | shellexec(argv, envp, path, idx); | |
991 | } | |
992 | handler = savehandler; | |
993 | if (jp) { | |
994 | struct procstat *ps = &jp->ps[jp->nprocs++]; | |
995 | ps->pid = pid; | |
996 | ps->status = -1; | |
997 | ps->cmd = nullstr; | |
998 | jp->foreground = 1; | |
999 | #if JOBS | |
1000 | setcurjob(jp); | |
1001 | #endif | |
1002 | } | |
1003 | INTON; | |
1004 | TRACE(("In parent shell: child = %d\n", (int)pid)); | |
1005 | return pid; | |
1006 | } | |
1007 | ||
984263bc MD |
1008 | |
1009 | /* | |
1010 | * Wait for job to finish. | |
1011 | * | |
1012 | * Under job control we have the problem that while a child process is | |
1013 | * running interrupts generated by the user are sent to the child but not | |
1014 | * to the shell. This means that an infinite loop started by an inter- | |
1015 | * active user may be hard to kill. With job control turned off, an | |
1016 | * interactive user may place an interactive program inside a loop. If | |
1017 | * the interactive program catches interrupts, the user doesn't want | |
1018 | * these interrupts to also abort the loop. The approach we take here | |
1019 | * is to have the shell ignore interrupt signals while waiting for a | |
1020 | * foreground process to terminate, and then send itself an interrupt | |
1021 | * signal if the child process was terminated by an interrupt signal. | |
1022 | * Unfortunately, some programs want to do a bit of cleanup and then | |
1023 | * exit on interrupt; unless these processes terminate themselves by | |
1024 | * sending a signal to themselves (instead of calling exit) they will | |
1025 | * confuse this approach. | |
1026 | */ | |
1027 | ||
1028 | int | |
1029 | waitforjob(struct job *jp, int *origstatus) | |
1030 | { | |
1031 | #if JOBS | |
99512ac4 | 1032 | int propagate_int = jp->jobctl && jp->foreground; |
984263bc MD |
1033 | #endif |
1034 | int status; | |
1035 | int st; | |
1036 | ||
1037 | INTOFF; | |
99512ac4 | 1038 | TRACE(("waitforjob(%%%td) called\n", jp - jobtab + 1)); |
984263bc | 1039 | while (jp->state == 0) |
02d0b1ce MD |
1040 | if (dowait(DOWAIT_BLOCK | (Tflag ? DOWAIT_SIG | |
1041 | DOWAIT_SIG_TRAP : 0), jp) == -1) | |
984263bc MD |
1042 | dotrap(); |
1043 | #if JOBS | |
1044 | if (jp->jobctl) { | |
02d0b1ce | 1045 | if (ttyfd >= 0 && tcsetpgrp(ttyfd, rootpid) < 0) |
984263bc MD |
1046 | error("tcsetpgrp failed, errno=%d\n", errno); |
1047 | } | |
1048 | if (jp->state == JOBSTOPPED) | |
1049 | setcurjob(jp); | |
1050 | #endif | |
1051 | status = jp->ps[jp->nprocs - 1].status; | |
1052 | if (origstatus != NULL) | |
1053 | *origstatus = status; | |
1054 | /* convert to 8 bits */ | |
1055 | if (WIFEXITED(status)) | |
1056 | st = WEXITSTATUS(status); | |
1057 | #if JOBS | |
1058 | else if (WIFSTOPPED(status)) | |
1059 | st = WSTOPSIG(status) + 128; | |
1060 | #endif | |
1061 | else | |
1062 | st = WTERMSIG(status) + 128; | |
1063 | if (! JOBS || jp->state == JOBDONE) | |
1064 | freejob(jp); | |
1065 | if (int_pending()) { | |
99512ac4 | 1066 | if (!WIFSIGNALED(status) || WTERMSIG(status) != SIGINT) |
984263bc MD |
1067 | CLEAR_PENDING_INT; |
1068 | } | |
99512ac4 | 1069 | #if JOBS |
02d0b1ce | 1070 | else if (rootshell && propagate_int && |
99512ac4 PA |
1071 | WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) |
1072 | kill(getpid(), SIGINT); | |
1073 | #endif | |
984263bc MD |
1074 | INTON; |
1075 | return st; | |
1076 | } | |
1077 | ||
1078 | ||
f00eae14 PA |
1079 | static void |
1080 | dummy_handler(int sig __unused) | |
1081 | { | |
1082 | } | |
984263bc MD |
1083 | |
1084 | /* | |
1085 | * Wait for a process to terminate. | |
1086 | */ | |
1087 | ||
99512ac4 | 1088 | static pid_t |
f00eae14 | 1089 | dowait(int mode, struct job *job) |
984263bc | 1090 | { |
f00eae14 PA |
1091 | struct sigaction sa, osa; |
1092 | sigset_t mask, omask; | |
984263bc MD |
1093 | pid_t pid; |
1094 | int status; | |
1095 | struct procstat *sp; | |
1096 | struct job *jp; | |
1097 | struct job *thisjob; | |
f00eae14 | 1098 | const char *sigstr; |
984263bc MD |
1099 | int done; |
1100 | int stopped; | |
1101 | int sig; | |
99512ac4 | 1102 | int coredump; |
f00eae14 PA |
1103 | int wflags; |
1104 | int restore_sigchld; | |
1105 | ||
1106 | TRACE(("dowait(%d, %p) called\n", mode, job)); | |
1107 | restore_sigchld = 0; | |
1108 | if ((mode & DOWAIT_SIG) != 0) { | |
1109 | sigfillset(&mask); | |
1110 | sigprocmask(SIG_BLOCK, &mask, &omask); | |
1111 | INTOFF; | |
1112 | if (!issigchldtrapped()) { | |
1113 | restore_sigchld = 1; | |
1114 | sa.sa_handler = dummy_handler; | |
1115 | sa.sa_flags = 0; | |
1116 | sigemptyset(&sa.sa_mask); | |
1117 | sigaction(SIGCHLD, &sa, &osa); | |
1118 | } | |
1119 | } | |
984263bc | 1120 | do { |
f00eae14 PA |
1121 | #if JOBS |
1122 | if (iflag) | |
1123 | wflags = WUNTRACED | WCONTINUED; | |
1124 | else | |
1125 | #endif | |
1126 | wflags = 0; | |
1127 | if ((mode & (DOWAIT_BLOCK | DOWAIT_SIG)) != DOWAIT_BLOCK) | |
1128 | wflags |= WNOHANG; | |
02d0b1ce | 1129 | pid = wait3(&status, wflags, (struct rusage *)NULL); |
984263bc | 1130 | TRACE(("wait returns %d, status=%d\n", (int)pid, status)); |
f00eae14 | 1131 | if (pid == 0 && (mode & DOWAIT_SIG) != 0) { |
f00eae14 | 1132 | pid = -1; |
02d0b1ce MD |
1133 | if (((mode & DOWAIT_SIG_TRAP) != 0 ? |
1134 | pendingsig : pendingsig_waitcmd) != 0) { | |
1135 | errno = EINTR; | |
1136 | break; | |
1137 | } | |
1138 | sigsuspend(&omask); | |
f00eae14 PA |
1139 | if (int_pending()) |
1140 | break; | |
1141 | } | |
02d0b1ce | 1142 | } while (pid == -1 && errno == EINTR); |
fc88d1a0 PA |
1143 | if (pid == -1 && errno == ECHILD && job != NULL) |
1144 | job->state = JOBDONE; | |
f00eae14 PA |
1145 | if ((mode & DOWAIT_SIG) != 0) { |
1146 | if (restore_sigchld) | |
1147 | sigaction(SIGCHLD, &osa, NULL); | |
1148 | sigprocmask(SIG_SETMASK, &omask, NULL); | |
1149 | INTON; | |
1150 | } | |
984263bc MD |
1151 | if (pid <= 0) |
1152 | return pid; | |
1153 | INTOFF; | |
1154 | thisjob = NULL; | |
1155 | for (jp = jobtab ; jp < jobtab + njobs ; jp++) { | |
99512ac4 | 1156 | if (jp->used && jp->nprocs > 0) { |
984263bc MD |
1157 | done = 1; |
1158 | stopped = 1; | |
1159 | for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { | |
1160 | if (sp->pid == -1) | |
1161 | continue; | |
02d0b1ce MD |
1162 | if (sp->pid == pid && (sp->status == -1 || |
1163 | WIFSTOPPED(sp->status))) { | |
984263bc MD |
1164 | TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", |
1165 | (int)pid, sp->status, | |
1166 | status)); | |
f00eae14 PA |
1167 | if (WIFCONTINUED(status)) { |
1168 | sp->status = -1; | |
1169 | jp->state = 0; | |
1170 | } else | |
1171 | sp->status = status; | |
984263bc MD |
1172 | thisjob = jp; |
1173 | } | |
1174 | if (sp->status == -1) | |
1175 | stopped = 0; | |
1176 | else if (WIFSTOPPED(sp->status)) | |
1177 | done = 0; | |
1178 | } | |
1179 | if (stopped) { /* stopped or done */ | |
1180 | int state = done? JOBDONE : JOBSTOPPED; | |
1181 | if (jp->state != state) { | |
99512ac4 | 1182 | TRACE(("Job %td: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); |
984263bc | 1183 | jp->state = state; |
99512ac4 PA |
1184 | if (jp != job) { |
1185 | if (done && !jp->remembered && | |
1186 | !iflag && jp != bgjob) | |
1187 | freejob(jp); | |
984263bc | 1188 | #if JOBS |
99512ac4 PA |
1189 | else if (done) |
1190 | deljob(jp); | |
984263bc | 1191 | #endif |
99512ac4 | 1192 | } |
984263bc MD |
1193 | } |
1194 | } | |
1195 | } | |
1196 | } | |
1197 | INTON; | |
99512ac4 PA |
1198 | if (!thisjob || thisjob->state == 0) |
1199 | ; | |
1200 | else if ((!rootshell || !iflag || thisjob == job) && | |
1201 | thisjob->foreground && thisjob->state != JOBSTOPPED) { | |
1202 | sig = 0; | |
1203 | coredump = 0; | |
1204 | for (sp = thisjob->ps; sp < thisjob->ps + thisjob->nprocs; sp++) | |
1205 | if (WIFSIGNALED(sp->status)) { | |
1206 | sig = WTERMSIG(sp->status); | |
1207 | coredump = WCOREDUMP(sp->status); | |
1208 | } | |
1209 | if (sig > 0 && sig != SIGINT && sig != SIGPIPE) { | |
f00eae14 PA |
1210 | sigstr = strsignal(sig); |
1211 | if (sigstr != NULL) | |
1212 | out2str(sigstr); | |
984263bc | 1213 | else |
f00eae14 | 1214 | out2str("Unknown signal"); |
99512ac4 PA |
1215 | if (coredump) |
1216 | out2str(" (core dumped)"); | |
1217 | out2c('\n'); | |
1218 | flushout(out2); | |
984263bc MD |
1219 | } |
1220 | } else { | |
fc88d1a0 | 1221 | TRACE(("Not printing status, rootshell=%d, job=%p\n", rootshell, job)); |
99512ac4 | 1222 | thisjob->changed = 1; |
984263bc MD |
1223 | } |
1224 | return pid; | |
1225 | } | |
1226 | ||
1227 | ||
1228 | ||
984263bc MD |
1229 | /* |
1230 | * return 1 if there are stopped jobs, otherwise 0 | |
1231 | */ | |
1232 | int job_warning = 0; | |
1233 | int | |
1234 | stoppedjobs(void) | |
1235 | { | |
1236 | int jobno; | |
1237 | struct job *jp; | |
1238 | ||
1239 | if (job_warning) | |
1240 | return (0); | |
1241 | for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { | |
1242 | if (jp->used == 0) | |
1243 | continue; | |
1244 | if (jp->state == JOBSTOPPED) { | |
99512ac4 | 1245 | out2fmt_flush("You have stopped jobs.\n"); |
984263bc MD |
1246 | job_warning = 2; |
1247 | return (1); | |
1248 | } | |
1249 | } | |
1250 | ||
1251 | return (0); | |
1252 | } | |
1253 | ||
99512ac4 PA |
1254 | |
1255 | static void | |
1256 | checkzombies(void) | |
1257 | { | |
1258 | while (njobs > 0 && dowait(0, NULL) > 0) | |
1259 | ; | |
1260 | } | |
1261 | ||
1262 | ||
1263 | int | |
1264 | backgndpidset(void) | |
1265 | { | |
1266 | return backgndpid != -1; | |
1267 | } | |
1268 | ||
1269 | ||
1270 | pid_t | |
1271 | backgndpidval(void) | |
1272 | { | |
32931063 | 1273 | if (bgjob != NULL && !forcelocal) |
99512ac4 PA |
1274 | bgjob->remembered = 1; |
1275 | return backgndpid; | |
1276 | } | |
1277 | ||
984263bc MD |
1278 | /* |
1279 | * Return a string identifying a command (to be printed by the | |
1280 | * jobs command. | |
1281 | */ | |
1282 | ||
99512ac4 PA |
1283 | static char *cmdnextc; |
1284 | static int cmdnleft; | |
984263bc MD |
1285 | #define MAXCMDTEXT 200 |
1286 | ||
1287 | char * | |
1288 | commandtext(union node *n) | |
1289 | { | |
1290 | char *name; | |
1291 | ||
1292 | cmdnextc = name = ckmalloc(MAXCMDTEXT); | |
1293 | cmdnleft = MAXCMDTEXT - 4; | |
1294 | cmdtxt(n); | |
1295 | *cmdnextc = '\0'; | |
1296 | return name; | |
1297 | } | |
1298 | ||
1299 | ||
02d0b1ce MD |
1300 | static void |
1301 | cmdtxtdogroup(union node *n) | |
1302 | { | |
1303 | cmdputs("; do "); | |
1304 | cmdtxt(n); | |
1305 | cmdputs("; done"); | |
1306 | } | |
1307 | ||
1308 | ||
1309 | static void | |
1310 | cmdtxtredir(union node *n, const char *op, int deffd) | |
1311 | { | |
1312 | char s[2]; | |
1313 | ||
1314 | if (n->nfile.fd != deffd) { | |
1315 | s[0] = n->nfile.fd + '0'; | |
1316 | s[1] = '\0'; | |
1317 | cmdputs(s); | |
1318 | } | |
1319 | cmdputs(op); | |
1320 | if (n->type == NTOFD || n->type == NFROMFD) { | |
1321 | if (n->ndup.dupfd >= 0) | |
1322 | s[0] = n->ndup.dupfd + '0'; | |
1323 | else | |
1324 | s[0] = '-'; | |
1325 | s[1] = '\0'; | |
1326 | cmdputs(s); | |
1327 | } else { | |
1328 | cmdtxt(n->nfile.fname); | |
1329 | } | |
1330 | } | |
1331 | ||
1332 | ||
99512ac4 | 1333 | static void |
984263bc MD |
1334 | cmdtxt(union node *n) |
1335 | { | |
1336 | union node *np; | |
1337 | struct nodelist *lp; | |
984263bc MD |
1338 | |
1339 | if (n == NULL) | |
1340 | return; | |
1341 | switch (n->type) { | |
1342 | case NSEMI: | |
1343 | cmdtxt(n->nbinary.ch1); | |
1344 | cmdputs("; "); | |
1345 | cmdtxt(n->nbinary.ch2); | |
1346 | break; | |
1347 | case NAND: | |
1348 | cmdtxt(n->nbinary.ch1); | |
1349 | cmdputs(" && "); | |
1350 | cmdtxt(n->nbinary.ch2); | |
1351 | break; | |
1352 | case NOR: | |
1353 | cmdtxt(n->nbinary.ch1); | |
1354 | cmdputs(" || "); | |
1355 | cmdtxt(n->nbinary.ch2); | |
1356 | break; | |
1357 | case NPIPE: | |
1358 | for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { | |
1359 | cmdtxt(lp->n); | |
1360 | if (lp->next) | |
1361 | cmdputs(" | "); | |
1362 | } | |
1363 | break; | |
1364 | case NSUBSHELL: | |
1365 | cmdputs("("); | |
1366 | cmdtxt(n->nredir.n); | |
1367 | cmdputs(")"); | |
1368 | break; | |
1369 | case NREDIR: | |
1370 | case NBACKGND: | |
1371 | cmdtxt(n->nredir.n); | |
1372 | break; | |
1373 | case NIF: | |
1374 | cmdputs("if "); | |
1375 | cmdtxt(n->nif.test); | |
1376 | cmdputs("; then "); | |
1377 | cmdtxt(n->nif.ifpart); | |
1378 | cmdputs("..."); | |
1379 | break; | |
1380 | case NWHILE: | |
1381 | cmdputs("while "); | |
02d0b1ce MD |
1382 | cmdtxt(n->nbinary.ch1); |
1383 | cmdtxtdogroup(n->nbinary.ch2); | |
1384 | break; | |
984263bc MD |
1385 | case NUNTIL: |
1386 | cmdputs("until "); | |
984263bc | 1387 | cmdtxt(n->nbinary.ch1); |
02d0b1ce | 1388 | cmdtxtdogroup(n->nbinary.ch2); |
984263bc MD |
1389 | break; |
1390 | case NFOR: | |
1391 | cmdputs("for "); | |
1392 | cmdputs(n->nfor.var); | |
1393 | cmdputs(" in ..."); | |
1394 | break; | |
1395 | case NCASE: | |
1396 | cmdputs("case "); | |
1397 | cmdputs(n->ncase.expr->narg.text); | |
1398 | cmdputs(" in ..."); | |
1399 | break; | |
1400 | case NDEFUN: | |
1401 | cmdputs(n->narg.text); | |
1402 | cmdputs("() ..."); | |
1403 | break; | |
f00eae14 PA |
1404 | case NNOT: |
1405 | cmdputs("! "); | |
1406 | cmdtxt(n->nnot.com); | |
1407 | break; | |
984263bc MD |
1408 | case NCMD: |
1409 | for (np = n->ncmd.args ; np ; np = np->narg.next) { | |
1410 | cmdtxt(np); | |
1411 | if (np->narg.next) | |
1412 | cmdputs(" "); | |
1413 | } | |
1414 | for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { | |
1415 | cmdputs(" "); | |
1416 | cmdtxt(np); | |
1417 | } | |
1418 | break; | |
1419 | case NARG: | |
1420 | cmdputs(n->narg.text); | |
1421 | break; | |
1422 | case NTO: | |
02d0b1ce MD |
1423 | cmdtxtredir(n, ">", 1); |
1424 | break; | |
984263bc | 1425 | case NAPPEND: |
02d0b1ce MD |
1426 | cmdtxtredir(n, ">>", 1); |
1427 | break; | |
984263bc | 1428 | case NTOFD: |
02d0b1ce MD |
1429 | cmdtxtredir(n, ">&", 1); |
1430 | break; | |
984263bc | 1431 | case NCLOBBER: |
02d0b1ce MD |
1432 | cmdtxtredir(n, ">|", 1); |
1433 | break; | |
984263bc | 1434 | case NFROM: |
02d0b1ce MD |
1435 | cmdtxtredir(n, "<", 0); |
1436 | break; | |
984263bc | 1437 | case NFROMTO: |
02d0b1ce MD |
1438 | cmdtxtredir(n, "<>", 0); |
1439 | break; | |
984263bc | 1440 | case NFROMFD: |
02d0b1ce | 1441 | cmdtxtredir(n, "<&", 0); |
984263bc MD |
1442 | break; |
1443 | case NHERE: | |
1444 | case NXHERE: | |
1445 | cmdputs("<<..."); | |
1446 | break; | |
1447 | default: | |
1448 | cmdputs("???"); | |
1449 | break; | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | ||
1454 | ||
99512ac4 | 1455 | static void |
492efe05 | 1456 | cmdputs(const char *s) |
984263bc | 1457 | { |
492efe05 CP |
1458 | const char *p; |
1459 | char *q; | |
984263bc MD |
1460 | char c; |
1461 | int subtype = 0; | |
1462 | ||
1463 | if (cmdnleft <= 0) | |
1464 | return; | |
1465 | p = s; | |
1466 | q = cmdnextc; | |
1467 | while ((c = *p++) != '\0') { | |
1468 | if (c == CTLESC) | |
1469 | *q++ = *p++; | |
1470 | else if (c == CTLVAR) { | |
1471 | *q++ = '$'; | |
1472 | if (--cmdnleft > 0) | |
1473 | *q++ = '{'; | |
1474 | subtype = *p++; | |
99512ac4 PA |
1475 | if ((subtype & VSTYPE) == VSLENGTH && --cmdnleft > 0) |
1476 | *q++ = '#'; | |
984263bc | 1477 | } else if (c == '=' && subtype != 0) { |
99512ac4 PA |
1478 | *q = "}-+?=##%%\0X"[(subtype & VSTYPE) - VSNORMAL]; |
1479 | if (*q) | |
1480 | q++; | |
1481 | else | |
1482 | cmdnleft++; | |
1483 | if (((subtype & VSTYPE) == VSTRIMLEFTMAX || | |
1484 | (subtype & VSTYPE) == VSTRIMRIGHTMAX) && | |
1485 | --cmdnleft > 0) | |
1486 | *q = q[-1], q++; | |
984263bc MD |
1487 | subtype = 0; |
1488 | } else if (c == CTLENDVAR) { | |
1489 | *q++ = '}'; | |
99512ac4 PA |
1490 | } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) { |
1491 | cmdnleft -= 5; | |
1492 | if (cmdnleft > 0) { | |
1493 | *q++ = '$'; | |
1494 | *q++ = '('; | |
1495 | *q++ = '.'; | |
1496 | *q++ = '.'; | |
1497 | *q++ = '.'; | |
1498 | *q++ = ')'; | |
1499 | } | |
1500 | } else if (c == CTLARI) { | |
1501 | cmdnleft -= 2; | |
1502 | if (cmdnleft > 0) { | |
1503 | *q++ = '$'; | |
1504 | *q++ = '('; | |
1505 | *q++ = '('; | |
1506 | } | |
1507 | p++; | |
1508 | } else if (c == CTLENDARI) { | |
1509 | if (--cmdnleft > 0) { | |
1510 | *q++ = ')'; | |
1511 | *q++ = ')'; | |
1512 | } | |
1513 | } else if (c == CTLQUOTEMARK || c == CTLQUOTEEND) | |
1514 | cmdnleft++; /* ignore */ | |
984263bc MD |
1515 | else |
1516 | *q++ = c; | |
1517 | if (--cmdnleft <= 0) { | |
1518 | *q++ = '.'; | |
1519 | *q++ = '.'; | |
1520 | *q++ = '.'; | |
1521 | break; | |
1522 | } | |
1523 | } | |
1524 | cmdnextc = q; | |
1525 | } |