Commit | Line | Data |
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ecc449eb KB |
1 | /*- |
2 | * Copyright (c) 1980, 1991 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * %sccs.include.redist.c% | |
b79f4fa9 DF |
6 | */ |
7 | ||
35371dec | 8 | #ifndef lint |
ecc449eb KB |
9 | static char sccsid[] = "@(#)proc.c 5.15 (Berkeley) %G%"; |
10 | #endif /* not lint */ | |
2d4bbda8 BJ |
11 | |
12 | #include "sh.h" | |
13 | #include "sh.dir.h" | |
14 | #include "sh.proc.h" | |
34c37a4c | 15 | #include <string.h> |
3ffa6b49 | 16 | #include <sys/wait.h> |
2d4bbda8 BJ |
17 | #include <sys/ioctl.h> |
18 | ||
19 | /* | |
20 | * C Shell - functions that manage processes, handling hanging, termination | |
21 | */ | |
22 | ||
23 | #define BIGINDEX 9 /* largest desirable job index */ | |
24 | ||
25 | /* | |
26 | * pchild - called at interrupt level by the SIGCHLD signal | |
27 | * indicating that at least one child has terminated or stopped | |
28 | * thus at least one wait system call will definitely return a | |
29 | * childs status. Top level routines (like pwait) must be sure | |
30 | * to mask interrupts when playing with the proclist data structures! | |
31 | */ | |
d3ac50fc | 32 | void |
2d4bbda8 BJ |
33 | pchild() |
34 | { | |
35 | register struct process *pp; | |
36 | register struct process *fp; | |
37 | register int pid; | |
38 | union wait w; | |
39 | int jobflags; | |
ea775389 | 40 | struct rusage ru; |
470cb5e7 | 41 | extern int insource; |
2d4bbda8 | 42 | |
2d4bbda8 | 43 | loop: |
d3ac50fc KB |
44 | pid = wait3((int *)&w, |
45 | (setintr && (intty || insource) ? WNOHANG|WUNTRACED:WNOHANG), &ru); | |
2d4bbda8 BJ |
46 | if (pid <= 0) { |
47 | if (errno == EINTR) { | |
48 | errno = 0; | |
49 | goto loop; | |
50 | } | |
51 | pnoprocesses = pid == -1; | |
52 | return; | |
53 | } | |
54 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) | |
55 | if (pid == pp->p_pid) | |
56 | goto found; | |
57 | goto loop; | |
58 | found: | |
59 | if (pid == atoi(value("child"))) | |
60 | unsetv("child"); | |
61 | pp->p_flags &= ~(PRUNNING|PSTOPPED|PREPORTED); | |
62 | if (WIFSTOPPED(w)) { | |
63 | pp->p_flags |= PSTOPPED; | |
64 | pp->p_reason = w.w_stopsig; | |
65 | } else { | |
35371dec EW |
66 | if (pp->p_flags & (PTIME|PPTIME) || adrof("time")) |
67 | (void) gettimeofday(&pp->p_etime, (struct timezone *)0); | |
ea775389 | 68 | pp->p_rusage = ru; |
2d4bbda8 BJ |
69 | if (WIFSIGNALED(w)) { |
70 | if (w.w_termsig == SIGINT) | |
71 | pp->p_flags |= PINTERRUPTED; | |
72 | else | |
73 | pp->p_flags |= PSIGNALED; | |
74 | if (w.w_coredump) | |
75 | pp->p_flags |= PDUMPED; | |
76 | pp->p_reason = w.w_termsig; | |
77 | } else { | |
78 | pp->p_reason = w.w_retcode; | |
2d4bbda8 | 79 | if (pp->p_reason != 0) |
2d4bbda8 BJ |
80 | pp->p_flags |= PAEXITED; |
81 | else | |
82 | pp->p_flags |= PNEXITED; | |
83 | } | |
84 | } | |
85 | jobflags = 0; | |
86 | fp = pp; | |
87 | do { | |
88 | if ((fp->p_flags & (PPTIME|PRUNNING|PSTOPPED)) == 0 && | |
89 | !child && adrof("time") && | |
35371dec | 90 | fp->p_rusage.ru_utime.tv_sec+fp->p_rusage.ru_stime.tv_sec >= |
2d4bbda8 BJ |
91 | atoi(value("time"))) |
92 | fp->p_flags |= PTIME; | |
93 | jobflags |= fp->p_flags; | |
94 | } while ((fp = fp->p_friends) != pp); | |
95 | pp->p_flags &= ~PFOREGND; | |
96 | if (pp == pp->p_friends && (pp->p_flags & PPTIME)) { | |
97 | pp->p_flags &= ~PPTIME; | |
98 | pp->p_flags |= PTIME; | |
99 | } | |
100 | if ((jobflags & (PRUNNING|PREPORTED)) == 0) { | |
101 | fp = pp; | |
102 | do { | |
103 | if (fp->p_flags&PSTOPPED) | |
104 | fp->p_flags |= PREPORTED; | |
105 | } while((fp = fp->p_friends) != pp); | |
106 | while(fp->p_pid != fp->p_jobid) | |
107 | fp = fp->p_friends; | |
a132d4ed BJ |
108 | if (jobflags&PSTOPPED) { |
109 | if (pcurrent && pcurrent != fp) | |
110 | pprevious = pcurrent; | |
111 | pcurrent = fp; | |
112 | } else | |
113 | pclrcurr(fp); | |
2d4bbda8 | 114 | if (jobflags&PFOREGND) { |
2d4bbda8 | 115 | if (jobflags & (PSIGNALED|PSTOPPED|PPTIME) || |
2d4bbda8 | 116 | !eq(dcwd->di_name, fp->p_cwd->di_name)) { |
401149be | 117 | ; /* print in pjwait */ |
b3409321 BJ |
118 | } |
119 | /* | |
120 | else if ((jobflags & (PTIME|PSTOPPED)) == PTIME) | |
2d4bbda8 | 121 | ptprint(fp); |
b3409321 | 122 | */ |
2d4bbda8 BJ |
123 | } else { |
124 | if (jobflags&PNOTIFY || adrof("notify")) { | |
125 | printf("\215\n"); | |
35371dec | 126 | (void) pprint(pp, NUMBER|NAME|REASON); |
2d4bbda8 BJ |
127 | if ((jobflags&PSTOPPED) == 0) |
128 | pflush(pp); | |
129 | } else { | |
2d4bbda8 BJ |
130 | fp->p_flags |= PNEEDNOTE; |
131 | neednote++; | |
132 | } | |
133 | } | |
134 | } | |
135 | goto loop; | |
136 | } | |
137 | ||
138 | pnote() | |
139 | { | |
140 | register struct process *pp; | |
1f7b623f KB |
141 | int flags; |
142 | long omask; | |
2d4bbda8 BJ |
143 | |
144 | neednote = 0; | |
145 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) { | |
146 | if (pp->p_flags & PNEEDNOTE) { | |
d33af40e | 147 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 BJ |
148 | pp->p_flags &= ~PNEEDNOTE; |
149 | flags = pprint(pp, NUMBER|NAME|REASON); | |
150 | if ((flags&(PRUNNING|PSTOPPED)) == 0) | |
151 | pflush(pp); | |
35371dec | 152 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
153 | } |
154 | } | |
155 | } | |
156 | ||
157 | /* | |
158 | * pwait - wait for current job to terminate, maintaining integrity | |
159 | * of current and previous job indicators. | |
160 | */ | |
161 | pwait() | |
162 | { | |
163 | register struct process *fp, *pp; | |
1f7b623f | 164 | long omask; |
2d4bbda8 BJ |
165 | |
166 | /* | |
167 | * Here's where dead procs get flushed. | |
168 | */ | |
d33af40e | 169 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 BJ |
170 | for (pp = (fp = &proclist)->p_next; pp != PNULL; pp = (fp = pp)->p_next) |
171 | if (pp->p_pid == 0) { | |
172 | fp->p_next = pp->p_next; | |
173 | xfree(pp->p_command); | |
174 | if (pp->p_cwd && --pp->p_cwd->di_count == 0) | |
175 | if (pp->p_cwd->di_next == 0) | |
176 | dfree(pp->p_cwd); | |
177 | xfree((char *)pp); | |
178 | pp = fp; | |
179 | } | |
35371dec | 180 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
181 | pjwait(pcurrjob); |
182 | } | |
183 | ||
184 | /* | |
185 | * pjwait - wait for a job to finish or become stopped | |
186 | * It is assumed to be in the foreground state (PFOREGND) | |
187 | */ | |
188 | pjwait(pp) | |
189 | register struct process *pp; | |
190 | { | |
191 | register struct process *fp; | |
1f7b623f KB |
192 | int jobflags, reason; |
193 | long omask; | |
d33af40e | 194 | |
525f24a3 SL |
195 | while (pp->p_pid != pp->p_jobid) |
196 | pp = pp->p_friends; | |
2d4bbda8 BJ |
197 | fp = pp; |
198 | do { | |
199 | if ((fp->p_flags&(PFOREGND|PRUNNING)) == PRUNNING) | |
200 | printf("BUG: waiting for background job!\n"); | |
201 | } while ((fp = fp->p_friends) != pp); | |
202 | /* | |
203 | * Now keep pausing as long as we are not interrupted (SIGINT), | |
204 | * and the target process, or any of its friends, are running | |
205 | */ | |
206 | fp = pp; | |
d33af40e | 207 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 | 208 | for (;;) { |
2d4bbda8 BJ |
209 | jobflags = 0; |
210 | do | |
211 | jobflags |= fp->p_flags; | |
d33af40e | 212 | while ((fp = (fp->p_friends)) != pp); |
2d4bbda8 BJ |
213 | if ((jobflags & PRUNNING) == 0) |
214 | break; | |
1f7b623f | 215 | sigpause(sigblock(0L) &~ sigmask(SIGCHLD)); |
2d4bbda8 | 216 | } |
35371dec EW |
217 | (void) sigsetmask(omask); |
218 | if (tpgrp > 0) /* get tty back */ | |
219 | (void) ioctl(FSHTTY, TIOCSPGRP, (char *)&tpgrp); | |
cd4a3dcb BJ |
220 | if ((jobflags&(PSIGNALED|PSTOPPED|PTIME)) || |
221 | !eq(dcwd->di_name, fp->p_cwd->di_name)) { | |
222 | if (jobflags&PSTOPPED) | |
223 | printf("\n"); | |
35371dec | 224 | (void) pprint(pp, AREASON|SHELLDIR); |
cd4a3dcb | 225 | } |
401149be | 226 | if ((jobflags&(PINTERRUPTED|PSTOPPED)) && setintr && |
2d4bbda8 | 227 | (!gointr || !eq(gointr, "-"))) { |
401149be BJ |
228 | if ((jobflags & PSTOPPED) == 0) |
229 | pflush(pp); | |
401149be | 230 | pintr1(0); |
2d4bbda8 BJ |
231 | /*NOTREACHED*/ |
232 | } | |
233 | reason = 0; | |
234 | fp = pp; | |
235 | do { | |
236 | if (fp->p_reason) | |
237 | reason = fp->p_flags & (PSIGNALED|PINTERRUPTED) ? | |
238 | fp->p_reason | QUOTE : fp->p_reason; | |
239 | } while ((fp = fp->p_friends) != pp); | |
240 | set("status", putn(reason)); | |
241 | if (reason && exiterr) | |
242 | exitstat(); | |
243 | pflush(pp); | |
244 | } | |
245 | ||
246 | /* | |
247 | * dowait - wait for all processes to finish | |
248 | */ | |
249 | dowait() | |
250 | { | |
251 | register struct process *pp; | |
1f7b623f | 252 | long omask; |
2d4bbda8 BJ |
253 | |
254 | pjobs++; | |
d33af40e | 255 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 | 256 | loop: |
2d4bbda8 | 257 | for (pp = proclist.p_next; pp; pp = pp->p_next) |
525f24a3 | 258 | if (pp->p_pid && /* pp->p_pid == pp->p_jobid && */ |
2d4bbda8 | 259 | pp->p_flags&PRUNNING) { |
1f7b623f | 260 | sigpause(0L); |
2d4bbda8 BJ |
261 | goto loop; |
262 | } | |
35371dec | 263 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
264 | pjobs = 0; |
265 | } | |
266 | ||
267 | /* | |
268 | * pflushall - flush all jobs from list (e.g. at fork()) | |
269 | */ | |
270 | pflushall() | |
271 | { | |
272 | register struct process *pp; | |
273 | ||
274 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) | |
275 | if (pp->p_pid) | |
276 | pflush(pp); | |
277 | } | |
278 | ||
279 | /* | |
280 | * pflush - flag all process structures in the same job as the | |
281 | * the argument process for deletion. The actual free of the | |
282 | * space is not done here since pflush is called at interrupt level. | |
283 | */ | |
284 | pflush(pp) | |
285 | register struct process *pp; | |
286 | { | |
287 | register struct process *np; | |
288 | register int index; | |
289 | ||
290 | if (pp->p_pid == 0) { | |
291 | printf("BUG: process flushed twice"); | |
292 | return; | |
293 | } | |
294 | while (pp->p_pid != pp->p_jobid) | |
295 | pp = pp->p_friends; | |
296 | pclrcurr(pp); | |
297 | if (pp == pcurrjob) | |
298 | pcurrjob = 0; | |
299 | index = pp->p_index; | |
300 | np = pp; | |
301 | do { | |
302 | np->p_index = np->p_pid = 0; | |
303 | np->p_flags &= ~PNEEDNOTE; | |
304 | } while ((np = np->p_friends) != pp); | |
305 | if (index == pmaxindex) { | |
306 | for (np = proclist.p_next, index = 0; np; np = np->p_next) | |
307 | if (np->p_index > index) | |
308 | index = np->p_index; | |
309 | pmaxindex = index; | |
310 | } | |
311 | } | |
312 | ||
313 | /* | |
314 | * pclrcurr - make sure the given job is not the current or previous job; | |
315 | * pp MUST be the job leader | |
316 | */ | |
317 | pclrcurr(pp) | |
318 | register struct process *pp; | |
319 | { | |
320 | ||
321 | if (pp == pcurrent) | |
322 | if (pprevious != PNULL) { | |
323 | pcurrent = pprevious; | |
324 | pprevious = pgetcurr(pp); | |
325 | } else { | |
326 | pcurrent = pgetcurr(pp); | |
327 | pprevious = pgetcurr(pp); | |
328 | } | |
329 | else if (pp == pprevious) | |
330 | pprevious = pgetcurr(pp); | |
331 | } | |
332 | ||
333 | /* +4 here is 1 for '\0', 1 ea for << >& >> */ | |
334 | char command[PMAXLEN+4]; | |
335 | int cmdlen; | |
336 | char *cmdp; | |
337 | /* | |
338 | * palloc - allocate a process structure and fill it up. | |
339 | * an important assumption is made that the process is running. | |
340 | */ | |
341 | palloc(pid, t) | |
342 | int pid; | |
343 | register struct command *t; | |
344 | { | |
345 | register struct process *pp; | |
346 | int i; | |
347 | ||
348 | pp = (struct process *)calloc(1, sizeof(struct process)); | |
349 | pp->p_pid = pid; | |
289ec3f8 KB |
350 | pp->p_flags = t->t_dflg & F_AMPERSAND ? PRUNNING : PRUNNING|PFOREGND; |
351 | if (t->t_dflg & F_TIME) | |
2d4bbda8 BJ |
352 | pp->p_flags |= PPTIME; |
353 | cmdp = command; | |
354 | cmdlen = 0; | |
355 | padd(t); | |
356 | *cmdp++ = 0; | |
289ec3f8 | 357 | if (t->t_dflg & F_PIPEOUT) { |
2d4bbda8 | 358 | pp->p_flags |= PPOU; |
289ec3f8 | 359 | if (t->t_dflg & F_STDERR) |
2d4bbda8 BJ |
360 | pp->p_flags |= PDIAG; |
361 | } | |
362 | pp->p_command = savestr(command); | |
363 | if (pcurrjob) { | |
364 | struct process *fp; | |
365 | /* careful here with interrupt level */ | |
366 | pp->p_cwd = 0; | |
367 | pp->p_index = pcurrjob->p_index; | |
368 | pp->p_friends = pcurrjob; | |
369 | pp->p_jobid = pcurrjob->p_pid; | |
370 | for (fp = pcurrjob; fp->p_friends != pcurrjob; fp = fp->p_friends) | |
371 | ; | |
372 | fp->p_friends = pp; | |
373 | } else { | |
374 | pcurrjob = pp; | |
375 | pp->p_jobid = pid; | |
376 | pp->p_friends = pp; | |
377 | pp->p_cwd = dcwd; | |
378 | dcwd->di_count++; | |
379 | if (pmaxindex < BIGINDEX) | |
380 | pp->p_index = ++pmaxindex; | |
381 | else { | |
382 | struct process *np; | |
383 | ||
384 | for (i = 1; ; i++) { | |
385 | for (np = proclist.p_next; np; np = np->p_next) | |
386 | if (np->p_index == i) | |
387 | goto tryagain; | |
a132d4ed BJ |
388 | pp->p_index = i; |
389 | if (i > pmaxindex) | |
390 | pmaxindex = i; | |
2d4bbda8 BJ |
391 | break; |
392 | tryagain:; | |
393 | } | |
394 | } | |
395 | if (pcurrent == PNULL) | |
396 | pcurrent = pp; | |
397 | else if (pprevious == PNULL) | |
398 | pprevious = pp; | |
399 | } | |
400 | pp->p_next = proclist.p_next; | |
401 | proclist.p_next = pp; | |
35371dec | 402 | (void) gettimeofday(&pp->p_btime, (struct timezone *)0); |
2d4bbda8 BJ |
403 | } |
404 | ||
405 | padd(t) | |
406 | register struct command *t; | |
407 | { | |
408 | char **argp; | |
409 | ||
410 | if (t == 0) | |
411 | return; | |
412 | switch (t->t_dtyp) { | |
413 | ||
289ec3f8 | 414 | case NODE_PAREN: |
2d4bbda8 BJ |
415 | pads("( "); |
416 | padd(t->t_dspr); | |
417 | pads(" )"); | |
418 | break; | |
419 | ||
289ec3f8 | 420 | case NODE_COMMAND: |
2d4bbda8 BJ |
421 | for (argp = t->t_dcom; *argp; argp++) { |
422 | pads(*argp); | |
423 | if (argp[1]) | |
424 | pads(" "); | |
425 | } | |
426 | break; | |
427 | ||
289ec3f8 KB |
428 | case NODE_OR: |
429 | case NODE_AND: | |
430 | case NODE_PIPE: | |
431 | case NODE_LIST: | |
2d4bbda8 | 432 | padd(t->t_dcar); |
1544707d | 433 | switch (t->t_dtyp) { |
289ec3f8 | 434 | case NODE_OR: |
1544707d EW |
435 | pads(" || "); |
436 | break; | |
289ec3f8 | 437 | case NODE_AND: |
1544707d EW |
438 | pads(" && "); |
439 | break; | |
289ec3f8 | 440 | case NODE_PIPE: |
1544707d EW |
441 | pads(" | "); |
442 | break; | |
289ec3f8 | 443 | case NODE_LIST: |
1544707d EW |
444 | pads("; "); |
445 | break; | |
446 | } | |
2d4bbda8 BJ |
447 | padd(t->t_dcdr); |
448 | return; | |
449 | } | |
289ec3f8 KB |
450 | if ((t->t_dflg & F_PIPEIN) == 0 && t->t_dlef) { |
451 | pads((t->t_dflg & F_READ) ? " << " : " < "); | |
2d4bbda8 BJ |
452 | pads(t->t_dlef); |
453 | } | |
289ec3f8 KB |
454 | if ((t->t_dflg & F_PIPEOUT) == 0 && t->t_drit) { |
455 | pads((t->t_dflg & F_APPEND) ? " >>" : " >"); | |
456 | if (t->t_dflg & F_STDERR) | |
2d4bbda8 BJ |
457 | pads("&"); |
458 | pads(" "); | |
459 | pads(t->t_drit); | |
460 | } | |
461 | } | |
462 | ||
463 | pads(cp) | |
464 | char *cp; | |
465 | { | |
466 | register int i = strlen(cp); | |
467 | ||
468 | if (cmdlen >= PMAXLEN) | |
469 | return; | |
470 | if (cmdlen + i >= PMAXLEN) { | |
35371dec | 471 | (void) strcpy(cmdp, " ..."); |
2d4bbda8 BJ |
472 | cmdlen = PMAXLEN; |
473 | cmdp += 4; | |
474 | return; | |
475 | } | |
35371dec | 476 | (void) strcpy(cmdp, cp); |
2d4bbda8 BJ |
477 | cmdp += i; |
478 | cmdlen += i; | |
479 | } | |
480 | ||
481 | /* | |
482 | * psavejob - temporarily save the current job on a one level stack | |
483 | * so another job can be created. Used for { } in exp6 | |
484 | * and `` in globbing. | |
485 | */ | |
486 | psavejob() | |
487 | { | |
488 | ||
489 | pholdjob = pcurrjob; | |
490 | pcurrjob = PNULL; | |
491 | } | |
492 | ||
493 | /* | |
494 | * prestjob - opposite of psavejob. This may be missed if we are interrupted | |
495 | * somewhere, but pendjob cleans up anyway. | |
496 | */ | |
497 | prestjob() | |
498 | { | |
499 | ||
500 | pcurrjob = pholdjob; | |
501 | pholdjob = PNULL; | |
502 | } | |
503 | ||
504 | /* | |
505 | * pendjob - indicate that a job (set of commands) has been completed | |
506 | * or is about to begin. | |
507 | */ | |
508 | pendjob() | |
509 | { | |
510 | register struct process *pp, *tp; | |
511 | ||
512 | if (pcurrjob && (pcurrjob->p_flags&(PFOREGND|PSTOPPED)) == 0) { | |
513 | pp = pcurrjob; | |
514 | while (pp->p_pid != pp->p_jobid) | |
515 | pp = pp->p_friends; | |
516 | printf("[%d]", pp->p_index); | |
517 | tp = pp; | |
518 | do { | |
519 | printf(" %d", pp->p_pid); | |
520 | pp = pp->p_friends; | |
521 | } while (pp != tp); | |
522 | printf("\n"); | |
523 | } | |
524 | pholdjob = pcurrjob = 0; | |
525 | } | |
526 | ||
527 | /* | |
528 | * pprint - print a job | |
529 | */ | |
530 | pprint(pp, flag) | |
531 | register struct process *pp; | |
532 | { | |
533 | register status, reason; | |
534 | struct process *tp; | |
535 | extern char *linp, linbuf[]; | |
536 | int jobflags, pstatus; | |
537 | char *format; | |
538 | ||
539 | while (pp->p_pid != pp->p_jobid) | |
540 | pp = pp->p_friends; | |
541 | if (pp == pp->p_friends && (pp->p_flags & PPTIME)) { | |
542 | pp->p_flags &= ~PPTIME; | |
543 | pp->p_flags |= PTIME; | |
544 | } | |
545 | tp = pp; | |
546 | status = reason = -1; | |
547 | jobflags = 0; | |
548 | do { | |
549 | jobflags |= pp->p_flags; | |
550 | pstatus = pp->p_flags & PALLSTATES; | |
551 | if (tp != pp && linp != linbuf && !(flag&FANCY) && | |
552 | (pstatus == status && pp->p_reason == reason || | |
553 | !(flag&REASON))) | |
554 | printf(" "); | |
555 | else { | |
556 | if (tp != pp && linp != linbuf) | |
557 | printf("\n"); | |
558 | if(flag&NUMBER) | |
559 | if (pp == tp) | |
560 | printf("[%d]%s %c ", pp->p_index, | |
561 | pp->p_index < 10 ? " " : "", | |
562 | pp==pcurrent ? '+' : | |
563 | (pp == pprevious ? '-' : ' ')); | |
564 | else | |
565 | printf(" "); | |
566 | if (flag&FANCY) | |
567 | printf("%5d ", pp->p_pid); | |
568 | if (flag&(REASON|AREASON)) { | |
569 | if (flag&NAME) | |
9c279653 | 570 | format = "%-23s"; |
2d4bbda8 BJ |
571 | else |
572 | format = "%s"; | |
573 | if (pstatus == status) | |
574 | if (pp->p_reason == reason) { | |
575 | printf(format, ""); | |
576 | goto prcomd; | |
577 | } else | |
578 | reason = pp->p_reason; | |
579 | else { | |
580 | status = pstatus; | |
581 | reason = pp->p_reason; | |
582 | } | |
583 | switch (status) { | |
584 | ||
585 | case PRUNNING: | |
586 | printf(format, "Running "); | |
587 | break; | |
588 | ||
589 | case PINTERRUPTED: | |
590 | case PSTOPPED: | |
591 | case PSIGNALED: | |
793f6534 JL |
592 | if ((flag&(REASON|AREASON)) |
593 | && reason != SIGINT | |
594 | && reason != SIGPIPE) | |
2d4bbda8 BJ |
595 | printf(format, mesg[pp->p_reason].pname); |
596 | break; | |
597 | ||
598 | case PNEXITED: | |
599 | case PAEXITED: | |
600 | if (flag & REASON) | |
601 | if (pp->p_reason) | |
602 | printf("Exit %-16d", pp->p_reason); | |
603 | else | |
604 | printf(format, "Done"); | |
605 | break; | |
606 | ||
607 | default: | |
608 | printf("BUG: status=%-9o", status); | |
609 | } | |
610 | } | |
611 | } | |
612 | prcomd: | |
613 | if (flag&NAME) { | |
614 | printf("%s", pp->p_command); | |
615 | if (pp->p_flags & PPOU) | |
616 | printf(" |"); | |
617 | if (pp->p_flags & PDIAG) | |
618 | printf("&"); | |
619 | } | |
620 | if (flag&(REASON|AREASON) && pp->p_flags&PDUMPED) | |
621 | printf(" (core dumped)"); | |
622 | if (tp == pp->p_friends) { | |
623 | if (flag&ERSAND) | |
624 | printf(" &"); | |
625 | if (flag&JOBDIR && | |
626 | !eq(tp->p_cwd->di_name, dcwd->di_name)) { | |
627 | printf(" (wd: "); | |
628 | dtildepr(value("home"), tp->p_cwd->di_name); | |
629 | printf(")"); | |
630 | } | |
631 | } | |
632 | if (pp->p_flags&PPTIME && !(status&(PSTOPPED|PRUNNING))) { | |
633 | if (linp != linbuf) | |
634 | printf("\n\t"); | |
ea775389 | 635 | { static struct rusage zru; |
ae3d9709 SL |
636 | prusage(&zru, &pp->p_rusage, &pp->p_etime, |
637 | &pp->p_btime); | |
ea775389 | 638 | } |
2d4bbda8 BJ |
639 | } |
640 | if (tp == pp->p_friends) { | |
641 | if (linp != linbuf) | |
642 | printf("\n"); | |
643 | if (flag&SHELLDIR && !eq(tp->p_cwd->di_name, dcwd->di_name)) { | |
644 | printf("(wd now: "); | |
645 | dtildepr(value("home"), dcwd->di_name); | |
646 | printf(")\n"); | |
647 | } | |
648 | } | |
649 | } while ((pp = pp->p_friends) != tp); | |
650 | if (jobflags&PTIME && (jobflags&(PSTOPPED|PRUNNING)) == 0) { | |
651 | if (jobflags & NUMBER) | |
652 | printf(" "); | |
653 | ptprint(tp); | |
654 | } | |
655 | return (jobflags); | |
656 | } | |
657 | ||
658 | ptprint(tp) | |
659 | register struct process *tp; | |
660 | { | |
ae3d9709 SL |
661 | struct timeval tetime, diff; |
662 | static struct timeval ztime; | |
ea775389 SL |
663 | struct rusage ru; |
664 | static struct rusage zru; | |
2d4bbda8 BJ |
665 | register struct process *pp = tp; |
666 | ||
ea775389 | 667 | ru = zru; |
ae3d9709 | 668 | tetime = ztime; |
2d4bbda8 | 669 | do { |
ea775389 | 670 | ruadd(&ru, &pp->p_rusage); |
ae3d9709 SL |
671 | tvsub(&diff, &pp->p_etime, &pp->p_btime); |
672 | if (timercmp(&diff, &tetime, >)) | |
673 | tetime = diff; | |
2d4bbda8 | 674 | } while ((pp = pp->p_friends) != tp); |
ae3d9709 | 675 | prusage(&zru, &ru, &tetime, &ztime); |
2d4bbda8 BJ |
676 | } |
677 | ||
678 | /* | |
679 | * dojobs - print all jobs | |
680 | */ | |
681 | dojobs(v) | |
682 | char **v; | |
683 | { | |
684 | register struct process *pp; | |
685 | register int flag = NUMBER|NAME|REASON; | |
686 | int i; | |
687 | ||
688 | if (chkstop) | |
689 | chkstop = 2; | |
690 | if (*++v) { | |
691 | if (v[1] || !eq(*v, "-l")) | |
692 | error("Usage: jobs [ -l ]"); | |
693 | flag |= FANCY|JOBDIR; | |
694 | } | |
695 | for (i = 1; i <= pmaxindex; i++) | |
696 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
697 | if (pp->p_index == i && pp->p_pid == pp->p_jobid) { | |
698 | pp->p_flags &= ~PNEEDNOTE; | |
699 | if (!(pprint(pp, flag) & (PRUNNING|PSTOPPED))) | |
700 | pflush(pp); | |
701 | break; | |
702 | } | |
703 | } | |
704 | ||
705 | /* | |
706 | * dofg - builtin - put the job into the foreground | |
707 | */ | |
708 | dofg(v) | |
709 | char **v; | |
710 | { | |
711 | register struct process *pp; | |
712 | ||
713 | okpcntl(); | |
714 | ++v; | |
715 | do { | |
716 | pp = pfind(*v); | |
717 | pstart(pp, 1); | |
2d4bbda8 BJ |
718 | pjwait(pp); |
719 | } while (*v && *++v); | |
720 | } | |
721 | ||
722 | /* | |
723 | * %... - builtin - put the job into the foreground | |
724 | */ | |
725 | dofg1(v) | |
726 | char **v; | |
727 | { | |
728 | register struct process *pp; | |
729 | ||
730 | okpcntl(); | |
731 | pp = pfind(v[0]); | |
732 | pstart(pp, 1); | |
2d4bbda8 BJ |
733 | pjwait(pp); |
734 | } | |
735 | ||
736 | /* | |
737 | * dobg - builtin - put the job into the background | |
738 | */ | |
739 | dobg(v) | |
740 | char **v; | |
741 | { | |
742 | register struct process *pp; | |
743 | ||
744 | okpcntl(); | |
745 | ++v; | |
746 | do { | |
747 | pp = pfind(*v); | |
748 | pstart(pp, 0); | |
749 | } while (*v && *++v); | |
750 | } | |
751 | ||
752 | /* | |
753 | * %... & - builtin - put the job into the background | |
754 | */ | |
755 | dobg1(v) | |
756 | char **v; | |
757 | { | |
758 | register struct process *pp; | |
759 | ||
760 | pp = pfind(v[0]); | |
761 | pstart(pp, 0); | |
762 | } | |
763 | ||
764 | /* | |
765 | * dostop - builtin - stop the job | |
766 | */ | |
767 | dostop(v) | |
768 | char **v; | |
769 | { | |
770 | ||
771 | pkill(++v, SIGSTOP); | |
772 | } | |
773 | ||
774 | /* | |
775 | * dokill - builtin - superset of kill (1) | |
776 | */ | |
777 | dokill(v) | |
778 | char **v; | |
779 | { | |
780 | register int signum; | |
781 | register char *name; | |
782 | ||
783 | v++; | |
784 | if (v[0] && v[0][0] == '-') { | |
785 | if (v[0][1] == 'l') { | |
786 | for (signum = 1; signum <= NSIG; signum++) { | |
787 | if (name = mesg[signum].iname) | |
788 | printf("%s ", name); | |
789 | if (signum == 16) | |
fad613b5 | 790 | cshputchar('\n'); |
2d4bbda8 | 791 | } |
fad613b5 | 792 | cshputchar('\n'); |
2d4bbda8 BJ |
793 | return; |
794 | } | |
795 | if (digit(v[0][1])) { | |
796 | signum = atoi(v[0]+1); | |
793f6534 | 797 | if (signum < 0 || signum > NSIG) |
2d4bbda8 BJ |
798 | bferr("Bad signal number"); |
799 | } else { | |
800 | name = &v[0][1]; | |
801 | for (signum = 1; signum <= NSIG; signum++) | |
802 | if (mesg[signum].iname && | |
803 | eq(name, mesg[signum].iname)) | |
804 | goto gotsig; | |
805 | setname(name); | |
806 | bferr("Unknown signal; kill -l lists signals"); | |
807 | } | |
808 | gotsig: | |
809 | v++; | |
810 | } else | |
811 | signum = SIGTERM; | |
812 | pkill(v, signum); | |
813 | } | |
814 | ||
815 | pkill(v, signum) | |
816 | char **v; | |
817 | int signum; | |
818 | { | |
819 | register struct process *pp, *np; | |
820 | register int jobflags = 0; | |
1f7b623f KB |
821 | int pid, err = 0; |
822 | long omask; | |
525f24a3 | 823 | char *cp; |
2d4bbda8 | 824 | |
d33af40e | 825 | omask = sigmask(SIGCHLD); |
2d4bbda8 | 826 | if (setintr) |
d33af40e RC |
827 | omask |= sigmask(SIGINT); |
828 | omask = sigblock(omask) & ~omask; | |
2d4bbda8 | 829 | while (*v) { |
525f24a3 SL |
830 | cp = globone(*v); |
831 | if (*cp == '%') { | |
832 | np = pp = pfind(cp); | |
2d4bbda8 BJ |
833 | do |
834 | jobflags |= np->p_flags; | |
835 | while ((np = np->p_friends) != pp); | |
836 | switch (signum) { | |
837 | ||
838 | case SIGSTOP: | |
839 | case SIGTSTP: | |
840 | case SIGTTIN: | |
841 | case SIGTTOU: | |
842 | if ((jobflags & PRUNNING) == 0) { | |
9c279653 | 843 | printf("%s: Already suspended\n", cp); |
2d4bbda8 BJ |
844 | err++; |
845 | goto cont; | |
846 | } | |
847 | } | |
9f4aa2a3 | 848 | if (killpg(pp->p_jobid, signum) < 0) { |
34c37a4c | 849 | printf("%s: %s\n", cp, strerror(errno)); |
9f4aa2a3 KM |
850 | err++; |
851 | } | |
2d4bbda8 | 852 | if (signum == SIGTERM || signum == SIGHUP) |
35371dec | 853 | (void) killpg(pp->p_jobid, SIGCONT); |
793f6534 | 854 | } else if (!(digit(*cp) || *cp == '-')) |
2d4bbda8 BJ |
855 | bferr("Arguments should be jobs or process id's"); |
856 | else { | |
525f24a3 | 857 | pid = atoi(cp); |
2d4bbda8 | 858 | if (kill(pid, signum) < 0) { |
34c37a4c | 859 | printf("%d: %s\n", pid, strerror(errno)); |
2d4bbda8 BJ |
860 | err++; |
861 | goto cont; | |
862 | } | |
863 | if (signum == SIGTERM || signum == SIGHUP) | |
35371dec | 864 | (void) kill(pid, SIGCONT); |
2d4bbda8 BJ |
865 | } |
866 | cont: | |
525f24a3 | 867 | xfree(cp); |
2d4bbda8 BJ |
868 | v++; |
869 | } | |
35371dec | 870 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
871 | if (err) |
872 | error(NOSTR); | |
873 | } | |
874 | ||
875 | /* | |
876 | * pstart - start the job in foreground/background | |
877 | */ | |
878 | pstart(pp, foregnd) | |
879 | register struct process *pp; | |
880 | int foregnd; | |
881 | { | |
882 | register struct process *np; | |
1f7b623f KB |
883 | int jobflags = 0; |
884 | long omask; | |
2d4bbda8 | 885 | |
d33af40e | 886 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 BJ |
887 | np = pp; |
888 | do { | |
889 | jobflags |= np->p_flags; | |
890 | if (np->p_flags&(PRUNNING|PSTOPPED)) { | |
891 | np->p_flags |= PRUNNING; | |
892 | np->p_flags &= ~PSTOPPED; | |
893 | if (foregnd) | |
894 | np->p_flags |= PFOREGND; | |
895 | else | |
896 | np->p_flags &= ~PFOREGND; | |
897 | } | |
898 | } while((np = np->p_friends) != pp); | |
a132d4ed BJ |
899 | if (!foregnd) |
900 | pclrcurr(pp); | |
35371dec | 901 | (void) pprint(pp, foregnd ? NAME|JOBDIR : NUMBER|NAME|AMPERSAND); |
2d4bbda8 | 902 | if (foregnd) |
35371dec | 903 | (void) ioctl(FSHTTY, TIOCSPGRP, (char *)&pp->p_jobid); |
2d4bbda8 | 904 | if (jobflags&PSTOPPED) |
35371dec EW |
905 | (void) killpg(pp->p_jobid, SIGCONT); |
906 | (void) sigsetmask(omask); | |
2d4bbda8 BJ |
907 | } |
908 | ||
909 | panystop(neednl) | |
910 | { | |
911 | register struct process *pp; | |
912 | ||
913 | chkstop = 2; | |
914 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
915 | if (pp->p_flags & PSTOPPED) | |
9c279653 | 916 | error("\nThere are suspended jobs" + 1 - neednl); |
2d4bbda8 BJ |
917 | } |
918 | ||
919 | struct process * | |
920 | pfind(cp) | |
921 | char *cp; | |
922 | { | |
923 | register struct process *pp, *np; | |
924 | ||
925 | if (cp == 0 || cp[1] == 0 || eq(cp, "%%") || eq(cp, "%+")) { | |
926 | if (pcurrent == PNULL) | |
927 | bferr("No current job"); | |
928 | return (pcurrent); | |
929 | } | |
930 | if (eq(cp, "%-") || eq(cp, "%#")) { | |
931 | if (pprevious == PNULL) | |
932 | bferr("No previous job"); | |
933 | return (pprevious); | |
934 | } | |
935 | if (digit(cp[1])) { | |
936 | int index = atoi(cp+1); | |
937 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
938 | if (pp->p_index == index && pp->p_pid == pp->p_jobid) | |
939 | return (pp); | |
940 | bferr("No such job"); | |
941 | } | |
942 | np = PNULL; | |
943 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
944 | if (pp->p_pid == pp->p_jobid) { | |
945 | if (cp[1] == '?') { | |
946 | register char *dp; | |
947 | for (dp = pp->p_command; *dp; dp++) { | |
948 | if (*dp != cp[2]) | |
949 | continue; | |
950 | if (prefix(cp+2, dp)) | |
951 | goto match; | |
952 | } | |
953 | } else if (prefix(cp+1, pp->p_command)) { | |
954 | match: | |
955 | if (np) | |
956 | bferr("Ambiguous"); | |
957 | np = pp; | |
958 | } | |
959 | } | |
960 | if (np) | |
961 | return (np); | |
962 | if (cp[1] == '?') | |
963 | bferr("No job matches pattern"); | |
964 | else | |
965 | bferr("No such job"); | |
35371dec | 966 | /*NOTREACHED*/ |
2d4bbda8 BJ |
967 | } |
968 | ||
969 | /* | |
a132d4ed | 970 | * pgetcurr - find most recent job that is not pp, preferably stopped |
2d4bbda8 BJ |
971 | */ |
972 | struct process * | |
973 | pgetcurr(pp) | |
974 | register struct process *pp; | |
975 | { | |
976 | register struct process *np; | |
a132d4ed | 977 | register struct process *xp = PNULL; |
2d4bbda8 BJ |
978 | |
979 | for (np = proclist.p_next; np; np = np->p_next) | |
980 | if (np != pcurrent && np != pp && np->p_pid && | |
981 | np->p_pid == np->p_jobid) { | |
a132d4ed BJ |
982 | if (np->p_flags & PSTOPPED) |
983 | return (np); | |
984 | if (xp == PNULL) | |
985 | xp = np; | |
2d4bbda8 | 986 | } |
a132d4ed | 987 | return (xp); |
2d4bbda8 BJ |
988 | } |
989 | ||
990 | /* | |
991 | * donotify - flag the job so as to report termination asynchronously | |
992 | */ | |
993 | donotify(v) | |
994 | char **v; | |
995 | { | |
996 | register struct process *pp; | |
997 | ||
998 | pp = pfind(*++v); | |
999 | pp->p_flags |= PNOTIFY; | |
1000 | } | |
1001 | ||
1002 | /* | |
1003 | * Do the fork and whatever should be done in the child side that | |
1004 | * should not be done if we are not forking at all (like for simple builtin's) | |
1005 | * Also do everything that needs any signals fiddled with in the parent side | |
1006 | * | |
1007 | * Wanttty tells whether process and/or tty pgrps are to be manipulated: | |
1008 | * -1: leave tty alone; inherit pgrp from parent | |
1009 | * 0: already have tty; manipulate process pgrps only | |
1010 | * 1: want to claim tty; manipulate process and tty pgrps | |
1011 | * It is usually just the value of tpgrp. | |
1012 | */ | |
1013 | pfork(t, wanttty) | |
1014 | struct command *t; /* command we are forking for */ | |
1015 | int wanttty; | |
1016 | { | |
1017 | register int pid; | |
1018 | bool ignint = 0; | |
1f7b623f KB |
1019 | int pgrp; |
1020 | long omask; | |
2d4bbda8 BJ |
1021 | |
1022 | /* | |
1023 | * A child will be uninterruptible only under very special | |
1024 | * conditions. Remember that the semantics of '&' is | |
1025 | * implemented by disconnecting the process from the tty so | |
1026 | * signals do not need to ignored just for '&'. | |
1027 | * Thus signals are set to default action for children unless: | |
1028 | * we have had an "onintr -" (then specifically ignored) | |
1029 | * we are not playing with signals (inherit action) | |
1030 | */ | |
1031 | if (setintr) | |
289ec3f8 | 1032 | ignint = (tpgrp == -1 && (t->t_dflg&F_NOINTERRUPT)) |
2d4bbda8 BJ |
1033 | || (gointr && eq(gointr, "-")); |
1034 | /* | |
1035 | * Hold SIGCHLD until we have the process installed in our table. | |
1036 | */ | |
d33af40e | 1037 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 BJ |
1038 | while ((pid = fork()) < 0) |
1039 | if (setintr == 0) | |
1040 | sleep(FORKSLEEP); | |
1041 | else { | |
35371dec | 1042 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
1043 | error("No more processes"); |
1044 | } | |
1045 | if (pid == 0) { | |
1046 | settimes(); | |
1047 | pgrp = pcurrjob ? pcurrjob->p_jobid : getpid(); | |
1048 | pflushall(); | |
1049 | pcurrjob = PNULL; | |
2d4bbda8 BJ |
1050 | child++; |
1051 | if (setintr) { | |
1052 | setintr = 0; /* until I think otherwise */ | |
2d4bbda8 BJ |
1053 | /* |
1054 | * Children just get blown away on SIGINT, SIGQUIT | |
1055 | * unless "onintr -" seen. | |
1056 | */ | |
35371dec EW |
1057 | (void) signal(SIGINT, ignint ? SIG_IGN : SIG_DFL); |
1058 | (void) signal(SIGQUIT, ignint ? SIG_IGN : SIG_DFL); | |
2d4bbda8 BJ |
1059 | if (wanttty >= 0) { |
1060 | /* make stoppable */ | |
35371dec EW |
1061 | (void) signal(SIGTSTP, SIG_DFL); |
1062 | (void) signal(SIGTTIN, SIG_DFL); | |
1063 | (void) signal(SIGTTOU, SIG_DFL); | |
2d4bbda8 | 1064 | } |
35371dec | 1065 | (void) signal(SIGTERM, parterm); |
289ec3f8 | 1066 | } else if (tpgrp == -1 && (t->t_dflg&F_NOINTERRUPT)) { |
35371dec EW |
1067 | (void) signal(SIGINT, SIG_IGN); |
1068 | (void) signal(SIGQUIT, SIG_IGN); | |
2d4bbda8 | 1069 | } |
2d4bbda8 | 1070 | if (wanttty >= 0 && tpgrp >= 0) |
35371dec | 1071 | (void) setpgrp(0, pgrp); |
34c37a4c MT |
1072 | if (wanttty > 0) |
1073 | (void) ioctl(FSHTTY, TIOCSPGRP, (char *)&pgrp); | |
2d4bbda8 BJ |
1074 | if (tpgrp > 0) |
1075 | tpgrp = 0; /* gave tty away */ | |
1076 | /* | |
289ec3f8 KB |
1077 | * Nohup and nice apply only to NODE_COMMAND's but it would be |
1078 | * nice (?!?) if you could say "nohup (foo;bar)". Then the | |
1079 | * parser would have to know about nice/nohup/time. | |
2d4bbda8 | 1080 | */ |
289ec3f8 | 1081 | if (t->t_dflg & F_NOHUP) |
35371dec | 1082 | (void) signal(SIGHUP, SIG_IGN); |
289ec3f8 | 1083 | if (t->t_dflg & F_NICE) |
793f6534 | 1084 | (void) setpriority(PRIO_PROCESS, 0, t->t_nice); |
2d4bbda8 | 1085 | } else { |
85443bfb MT |
1086 | if (wanttty >= 0 && tpgrp >= 0) |
1087 | (void) setpgrp(pid, pcurrjob ? pcurrjob->p_jobid : pid); | |
2d4bbda8 | 1088 | palloc(pid, t); |
35371dec | 1089 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
1090 | } |
1091 | ||
1092 | return (pid); | |
1093 | } | |
1094 | ||
1095 | okpcntl() | |
1096 | { | |
1097 | ||
1098 | if (tpgrp == -1) | |
1099 | error("No job control in this shell"); | |
1100 | if (tpgrp == 0) | |
1101 | error("No job control in subshells"); | |
1102 | } |