Commit | Line | Data |
---|---|---|
b79f4fa9 DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
094e80ed | 3 | * All rights reserved. The Berkeley Software License Agreement |
b79f4fa9 DF |
4 | * specifies the terms and conditions for redistribution. |
5 | */ | |
6 | ||
35371dec | 7 | #ifndef lint |
1ab62557 | 8 | static char *sccsid = "@(#)proc.c 5.4 (Berkeley) %G%"; |
094e80ed | 9 | #endif |
2d4bbda8 BJ |
10 | |
11 | #include "sh.h" | |
12 | #include "sh.dir.h" | |
13 | #include "sh.proc.h" | |
3ffa6b49 | 14 | #include <sys/wait.h> |
2d4bbda8 BJ |
15 | #include <sys/ioctl.h> |
16 | ||
17 | /* | |
18 | * C Shell - functions that manage processes, handling hanging, termination | |
19 | */ | |
20 | ||
21 | #define BIGINDEX 9 /* largest desirable job index */ | |
22 | ||
23 | /* | |
24 | * pchild - called at interrupt level by the SIGCHLD signal | |
25 | * indicating that at least one child has terminated or stopped | |
26 | * thus at least one wait system call will definitely return a | |
27 | * childs status. Top level routines (like pwait) must be sure | |
28 | * to mask interrupts when playing with the proclist data structures! | |
29 | */ | |
30 | pchild() | |
31 | { | |
32 | register struct process *pp; | |
33 | register struct process *fp; | |
34 | register int pid; | |
35 | union wait w; | |
36 | int jobflags; | |
ea775389 | 37 | struct rusage ru; |
2d4bbda8 | 38 | |
2d4bbda8 | 39 | loop: |
35371dec | 40 | pid = wait3(&w, (setintr ? WNOHANG|WUNTRACED:WNOHANG), &ru); |
2d4bbda8 BJ |
41 | if (pid <= 0) { |
42 | if (errno == EINTR) { | |
43 | errno = 0; | |
44 | goto loop; | |
45 | } | |
46 | pnoprocesses = pid == -1; | |
47 | return; | |
48 | } | |
49 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) | |
50 | if (pid == pp->p_pid) | |
51 | goto found; | |
52 | goto loop; | |
53 | found: | |
54 | if (pid == atoi(value("child"))) | |
55 | unsetv("child"); | |
56 | pp->p_flags &= ~(PRUNNING|PSTOPPED|PREPORTED); | |
57 | if (WIFSTOPPED(w)) { | |
58 | pp->p_flags |= PSTOPPED; | |
59 | pp->p_reason = w.w_stopsig; | |
60 | } else { | |
35371dec EW |
61 | if (pp->p_flags & (PTIME|PPTIME) || adrof("time")) |
62 | (void) gettimeofday(&pp->p_etime, (struct timezone *)0); | |
ea775389 | 63 | pp->p_rusage = ru; |
2d4bbda8 BJ |
64 | if (WIFSIGNALED(w)) { |
65 | if (w.w_termsig == SIGINT) | |
66 | pp->p_flags |= PINTERRUPTED; | |
67 | else | |
68 | pp->p_flags |= PSIGNALED; | |
69 | if (w.w_coredump) | |
70 | pp->p_flags |= PDUMPED; | |
71 | pp->p_reason = w.w_termsig; | |
72 | } else { | |
73 | pp->p_reason = w.w_retcode; | |
2d4bbda8 | 74 | if (pp->p_reason != 0) |
2d4bbda8 BJ |
75 | pp->p_flags |= PAEXITED; |
76 | else | |
77 | pp->p_flags |= PNEXITED; | |
78 | } | |
79 | } | |
80 | jobflags = 0; | |
81 | fp = pp; | |
82 | do { | |
83 | if ((fp->p_flags & (PPTIME|PRUNNING|PSTOPPED)) == 0 && | |
84 | !child && adrof("time") && | |
35371dec | 85 | fp->p_rusage.ru_utime.tv_sec+fp->p_rusage.ru_stime.tv_sec >= |
2d4bbda8 BJ |
86 | atoi(value("time"))) |
87 | fp->p_flags |= PTIME; | |
88 | jobflags |= fp->p_flags; | |
89 | } while ((fp = fp->p_friends) != pp); | |
90 | pp->p_flags &= ~PFOREGND; | |
91 | if (pp == pp->p_friends && (pp->p_flags & PPTIME)) { | |
92 | pp->p_flags &= ~PPTIME; | |
93 | pp->p_flags |= PTIME; | |
94 | } | |
95 | if ((jobflags & (PRUNNING|PREPORTED)) == 0) { | |
96 | fp = pp; | |
97 | do { | |
98 | if (fp->p_flags&PSTOPPED) | |
99 | fp->p_flags |= PREPORTED; | |
100 | } while((fp = fp->p_friends) != pp); | |
101 | while(fp->p_pid != fp->p_jobid) | |
102 | fp = fp->p_friends; | |
a132d4ed BJ |
103 | if (jobflags&PSTOPPED) { |
104 | if (pcurrent && pcurrent != fp) | |
105 | pprevious = pcurrent; | |
106 | pcurrent = fp; | |
107 | } else | |
108 | pclrcurr(fp); | |
2d4bbda8 | 109 | if (jobflags&PFOREGND) { |
2d4bbda8 BJ |
110 | if (jobflags & (PSIGNALED|PSTOPPED|PPTIME) || |
111 | #ifdef IIASA | |
112 | jobflags & PAEXITED || | |
113 | #endif | |
114 | !eq(dcwd->di_name, fp->p_cwd->di_name)) { | |
401149be | 115 | ; /* print in pjwait */ |
b3409321 BJ |
116 | } |
117 | /* | |
118 | else if ((jobflags & (PTIME|PSTOPPED)) == PTIME) | |
2d4bbda8 | 119 | ptprint(fp); |
b3409321 | 120 | */ |
2d4bbda8 BJ |
121 | } else { |
122 | if (jobflags&PNOTIFY || adrof("notify")) { | |
123 | printf("\215\n"); | |
35371dec | 124 | (void) pprint(pp, NUMBER|NAME|REASON); |
2d4bbda8 BJ |
125 | if ((jobflags&PSTOPPED) == 0) |
126 | pflush(pp); | |
127 | } else { | |
2d4bbda8 BJ |
128 | fp->p_flags |= PNEEDNOTE; |
129 | neednote++; | |
130 | } | |
131 | } | |
132 | } | |
133 | goto loop; | |
134 | } | |
135 | ||
136 | pnote() | |
137 | { | |
138 | register struct process *pp; | |
d33af40e | 139 | int flags, omask; |
2d4bbda8 BJ |
140 | |
141 | neednote = 0; | |
142 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) { | |
143 | if (pp->p_flags & PNEEDNOTE) { | |
d33af40e | 144 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 BJ |
145 | pp->p_flags &= ~PNEEDNOTE; |
146 | flags = pprint(pp, NUMBER|NAME|REASON); | |
147 | if ((flags&(PRUNNING|PSTOPPED)) == 0) | |
148 | pflush(pp); | |
35371dec | 149 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
150 | } |
151 | } | |
152 | } | |
153 | ||
154 | /* | |
155 | * pwait - wait for current job to terminate, maintaining integrity | |
156 | * of current and previous job indicators. | |
157 | */ | |
158 | pwait() | |
159 | { | |
160 | register struct process *fp, *pp; | |
d33af40e | 161 | int omask; |
2d4bbda8 BJ |
162 | |
163 | /* | |
164 | * Here's where dead procs get flushed. | |
165 | */ | |
d33af40e | 166 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 BJ |
167 | for (pp = (fp = &proclist)->p_next; pp != PNULL; pp = (fp = pp)->p_next) |
168 | if (pp->p_pid == 0) { | |
169 | fp->p_next = pp->p_next; | |
170 | xfree(pp->p_command); | |
171 | if (pp->p_cwd && --pp->p_cwd->di_count == 0) | |
172 | if (pp->p_cwd->di_next == 0) | |
173 | dfree(pp->p_cwd); | |
174 | xfree((char *)pp); | |
175 | pp = fp; | |
176 | } | |
35371dec | 177 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
178 | pjwait(pcurrjob); |
179 | } | |
180 | ||
181 | /* | |
182 | * pjwait - wait for a job to finish or become stopped | |
183 | * It is assumed to be in the foreground state (PFOREGND) | |
184 | */ | |
185 | pjwait(pp) | |
186 | register struct process *pp; | |
187 | { | |
188 | register struct process *fp; | |
d33af40e | 189 | int jobflags, reason, omask; |
d33af40e | 190 | |
525f24a3 SL |
191 | while (pp->p_pid != pp->p_jobid) |
192 | pp = pp->p_friends; | |
2d4bbda8 BJ |
193 | fp = pp; |
194 | do { | |
195 | if ((fp->p_flags&(PFOREGND|PRUNNING)) == PRUNNING) | |
196 | printf("BUG: waiting for background job!\n"); | |
197 | } while ((fp = fp->p_friends) != pp); | |
198 | /* | |
199 | * Now keep pausing as long as we are not interrupted (SIGINT), | |
200 | * and the target process, or any of its friends, are running | |
201 | */ | |
202 | fp = pp; | |
d33af40e | 203 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 | 204 | for (;;) { |
2d4bbda8 BJ |
205 | jobflags = 0; |
206 | do | |
207 | jobflags |= fp->p_flags; | |
d33af40e | 208 | while ((fp = (fp->p_friends)) != pp); |
2d4bbda8 BJ |
209 | if ((jobflags & PRUNNING) == 0) |
210 | break; | |
0901a880 | 211 | sigpause(sigblock(0) &~ sigmask(SIGCHLD)); |
2d4bbda8 | 212 | } |
35371dec EW |
213 | (void) sigsetmask(omask); |
214 | if (tpgrp > 0) /* get tty back */ | |
215 | (void) ioctl(FSHTTY, TIOCSPGRP, (char *)&tpgrp); | |
cd4a3dcb BJ |
216 | if ((jobflags&(PSIGNALED|PSTOPPED|PTIME)) || |
217 | !eq(dcwd->di_name, fp->p_cwd->di_name)) { | |
218 | if (jobflags&PSTOPPED) | |
219 | printf("\n"); | |
35371dec | 220 | (void) pprint(pp, AREASON|SHELLDIR); |
cd4a3dcb | 221 | } |
401149be | 222 | if ((jobflags&(PINTERRUPTED|PSTOPPED)) && setintr && |
2d4bbda8 | 223 | (!gointr || !eq(gointr, "-"))) { |
401149be BJ |
224 | if ((jobflags & PSTOPPED) == 0) |
225 | pflush(pp); | |
401149be | 226 | pintr1(0); |
2d4bbda8 BJ |
227 | /*NOTREACHED*/ |
228 | } | |
229 | reason = 0; | |
230 | fp = pp; | |
231 | do { | |
232 | if (fp->p_reason) | |
233 | reason = fp->p_flags & (PSIGNALED|PINTERRUPTED) ? | |
234 | fp->p_reason | QUOTE : fp->p_reason; | |
235 | } while ((fp = fp->p_friends) != pp); | |
236 | set("status", putn(reason)); | |
237 | if (reason && exiterr) | |
238 | exitstat(); | |
239 | pflush(pp); | |
240 | } | |
241 | ||
242 | /* | |
243 | * dowait - wait for all processes to finish | |
244 | */ | |
245 | dowait() | |
246 | { | |
247 | register struct process *pp; | |
d33af40e | 248 | int omask; |
2d4bbda8 BJ |
249 | |
250 | pjobs++; | |
d33af40e | 251 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 | 252 | loop: |
2d4bbda8 | 253 | for (pp = proclist.p_next; pp; pp = pp->p_next) |
525f24a3 | 254 | if (pp->p_pid && /* pp->p_pid == pp->p_jobid && */ |
2d4bbda8 | 255 | pp->p_flags&PRUNNING) { |
d33af40e | 256 | sigpause(0); |
2d4bbda8 BJ |
257 | goto loop; |
258 | } | |
35371dec | 259 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
260 | pjobs = 0; |
261 | } | |
262 | ||
263 | /* | |
264 | * pflushall - flush all jobs from list (e.g. at fork()) | |
265 | */ | |
266 | pflushall() | |
267 | { | |
268 | register struct process *pp; | |
269 | ||
270 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) | |
271 | if (pp->p_pid) | |
272 | pflush(pp); | |
273 | } | |
274 | ||
275 | /* | |
276 | * pflush - flag all process structures in the same job as the | |
277 | * the argument process for deletion. The actual free of the | |
278 | * space is not done here since pflush is called at interrupt level. | |
279 | */ | |
280 | pflush(pp) | |
281 | register struct process *pp; | |
282 | { | |
283 | register struct process *np; | |
284 | register int index; | |
285 | ||
286 | if (pp->p_pid == 0) { | |
287 | printf("BUG: process flushed twice"); | |
288 | return; | |
289 | } | |
290 | while (pp->p_pid != pp->p_jobid) | |
291 | pp = pp->p_friends; | |
292 | pclrcurr(pp); | |
293 | if (pp == pcurrjob) | |
294 | pcurrjob = 0; | |
295 | index = pp->p_index; | |
296 | np = pp; | |
297 | do { | |
298 | np->p_index = np->p_pid = 0; | |
299 | np->p_flags &= ~PNEEDNOTE; | |
300 | } while ((np = np->p_friends) != pp); | |
301 | if (index == pmaxindex) { | |
302 | for (np = proclist.p_next, index = 0; np; np = np->p_next) | |
303 | if (np->p_index > index) | |
304 | index = np->p_index; | |
305 | pmaxindex = index; | |
306 | } | |
307 | } | |
308 | ||
309 | /* | |
310 | * pclrcurr - make sure the given job is not the current or previous job; | |
311 | * pp MUST be the job leader | |
312 | */ | |
313 | pclrcurr(pp) | |
314 | register struct process *pp; | |
315 | { | |
316 | ||
317 | if (pp == pcurrent) | |
318 | if (pprevious != PNULL) { | |
319 | pcurrent = pprevious; | |
320 | pprevious = pgetcurr(pp); | |
321 | } else { | |
322 | pcurrent = pgetcurr(pp); | |
323 | pprevious = pgetcurr(pp); | |
324 | } | |
325 | else if (pp == pprevious) | |
326 | pprevious = pgetcurr(pp); | |
327 | } | |
328 | ||
329 | /* +4 here is 1 for '\0', 1 ea for << >& >> */ | |
330 | char command[PMAXLEN+4]; | |
331 | int cmdlen; | |
332 | char *cmdp; | |
333 | /* | |
334 | * palloc - allocate a process structure and fill it up. | |
335 | * an important assumption is made that the process is running. | |
336 | */ | |
337 | palloc(pid, t) | |
338 | int pid; | |
339 | register struct command *t; | |
340 | { | |
341 | register struct process *pp; | |
342 | int i; | |
343 | ||
344 | pp = (struct process *)calloc(1, sizeof(struct process)); | |
345 | pp->p_pid = pid; | |
346 | pp->p_flags = t->t_dflg & FAND ? PRUNNING : PRUNNING|PFOREGND; | |
347 | if (t->t_dflg & FTIME) | |
348 | pp->p_flags |= PPTIME; | |
349 | cmdp = command; | |
350 | cmdlen = 0; | |
351 | padd(t); | |
352 | *cmdp++ = 0; | |
353 | if (t->t_dflg & FPOU) { | |
354 | pp->p_flags |= PPOU; | |
355 | if (t->t_dflg & FDIAG) | |
356 | pp->p_flags |= PDIAG; | |
357 | } | |
358 | pp->p_command = savestr(command); | |
359 | if (pcurrjob) { | |
360 | struct process *fp; | |
361 | /* careful here with interrupt level */ | |
362 | pp->p_cwd = 0; | |
363 | pp->p_index = pcurrjob->p_index; | |
364 | pp->p_friends = pcurrjob; | |
365 | pp->p_jobid = pcurrjob->p_pid; | |
366 | for (fp = pcurrjob; fp->p_friends != pcurrjob; fp = fp->p_friends) | |
367 | ; | |
368 | fp->p_friends = pp; | |
369 | } else { | |
370 | pcurrjob = pp; | |
371 | pp->p_jobid = pid; | |
372 | pp->p_friends = pp; | |
373 | pp->p_cwd = dcwd; | |
374 | dcwd->di_count++; | |
375 | if (pmaxindex < BIGINDEX) | |
376 | pp->p_index = ++pmaxindex; | |
377 | else { | |
378 | struct process *np; | |
379 | ||
380 | for (i = 1; ; i++) { | |
381 | for (np = proclist.p_next; np; np = np->p_next) | |
382 | if (np->p_index == i) | |
383 | goto tryagain; | |
a132d4ed BJ |
384 | pp->p_index = i; |
385 | if (i > pmaxindex) | |
386 | pmaxindex = i; | |
2d4bbda8 BJ |
387 | break; |
388 | tryagain:; | |
389 | } | |
390 | } | |
391 | if (pcurrent == PNULL) | |
392 | pcurrent = pp; | |
393 | else if (pprevious == PNULL) | |
394 | pprevious = pp; | |
395 | } | |
396 | pp->p_next = proclist.p_next; | |
397 | proclist.p_next = pp; | |
35371dec | 398 | (void) gettimeofday(&pp->p_btime, (struct timezone *)0); |
2d4bbda8 BJ |
399 | } |
400 | ||
401 | padd(t) | |
402 | register struct command *t; | |
403 | { | |
404 | char **argp; | |
405 | ||
406 | if (t == 0) | |
407 | return; | |
408 | switch (t->t_dtyp) { | |
409 | ||
410 | case TPAR: | |
411 | pads("( "); | |
412 | padd(t->t_dspr); | |
413 | pads(" )"); | |
414 | break; | |
415 | ||
416 | case TCOM: | |
417 | for (argp = t->t_dcom; *argp; argp++) { | |
418 | pads(*argp); | |
419 | if (argp[1]) | |
420 | pads(" "); | |
421 | } | |
422 | break; | |
423 | ||
1544707d EW |
424 | case TOR: |
425 | case TAND: | |
2d4bbda8 | 426 | case TFIL: |
2d4bbda8 BJ |
427 | case TLST: |
428 | padd(t->t_dcar); | |
1544707d EW |
429 | switch (t->t_dtyp) { |
430 | case TOR: | |
431 | pads(" || "); | |
432 | break; | |
433 | case TAND: | |
434 | pads(" && "); | |
435 | break; | |
436 | case TFIL: | |
437 | pads(" | "); | |
438 | break; | |
439 | case TLST: | |
440 | pads("; "); | |
441 | break; | |
442 | } | |
2d4bbda8 BJ |
443 | padd(t->t_dcdr); |
444 | return; | |
445 | } | |
446 | if ((t->t_dflg & FPIN) == 0 && t->t_dlef) { | |
447 | pads((t->t_dflg & FHERE) ? " << " : " < "); | |
448 | pads(t->t_dlef); | |
449 | } | |
450 | if ((t->t_dflg & FPOU) == 0 && t->t_drit) { | |
451 | pads((t->t_dflg & FCAT) ? " >>" : " >"); | |
452 | if (t->t_dflg & FDIAG) | |
453 | pads("&"); | |
454 | pads(" "); | |
455 | pads(t->t_drit); | |
456 | } | |
457 | } | |
458 | ||
459 | pads(cp) | |
460 | char *cp; | |
461 | { | |
462 | register int i = strlen(cp); | |
463 | ||
464 | if (cmdlen >= PMAXLEN) | |
465 | return; | |
466 | if (cmdlen + i >= PMAXLEN) { | |
35371dec | 467 | (void) strcpy(cmdp, " ..."); |
2d4bbda8 BJ |
468 | cmdlen = PMAXLEN; |
469 | cmdp += 4; | |
470 | return; | |
471 | } | |
35371dec | 472 | (void) strcpy(cmdp, cp); |
2d4bbda8 BJ |
473 | cmdp += i; |
474 | cmdlen += i; | |
475 | } | |
476 | ||
477 | /* | |
478 | * psavejob - temporarily save the current job on a one level stack | |
479 | * so another job can be created. Used for { } in exp6 | |
480 | * and `` in globbing. | |
481 | */ | |
482 | psavejob() | |
483 | { | |
484 | ||
485 | pholdjob = pcurrjob; | |
486 | pcurrjob = PNULL; | |
487 | } | |
488 | ||
489 | /* | |
490 | * prestjob - opposite of psavejob. This may be missed if we are interrupted | |
491 | * somewhere, but pendjob cleans up anyway. | |
492 | */ | |
493 | prestjob() | |
494 | { | |
495 | ||
496 | pcurrjob = pholdjob; | |
497 | pholdjob = PNULL; | |
498 | } | |
499 | ||
500 | /* | |
501 | * pendjob - indicate that a job (set of commands) has been completed | |
502 | * or is about to begin. | |
503 | */ | |
504 | pendjob() | |
505 | { | |
506 | register struct process *pp, *tp; | |
507 | ||
508 | if (pcurrjob && (pcurrjob->p_flags&(PFOREGND|PSTOPPED)) == 0) { | |
509 | pp = pcurrjob; | |
510 | while (pp->p_pid != pp->p_jobid) | |
511 | pp = pp->p_friends; | |
512 | printf("[%d]", pp->p_index); | |
513 | tp = pp; | |
514 | do { | |
515 | printf(" %d", pp->p_pid); | |
516 | pp = pp->p_friends; | |
517 | } while (pp != tp); | |
518 | printf("\n"); | |
519 | } | |
520 | pholdjob = pcurrjob = 0; | |
521 | } | |
522 | ||
523 | /* | |
524 | * pprint - print a job | |
525 | */ | |
526 | pprint(pp, flag) | |
527 | register struct process *pp; | |
528 | { | |
529 | register status, reason; | |
530 | struct process *tp; | |
531 | extern char *linp, linbuf[]; | |
532 | int jobflags, pstatus; | |
533 | char *format; | |
534 | ||
535 | while (pp->p_pid != pp->p_jobid) | |
536 | pp = pp->p_friends; | |
537 | if (pp == pp->p_friends && (pp->p_flags & PPTIME)) { | |
538 | pp->p_flags &= ~PPTIME; | |
539 | pp->p_flags |= PTIME; | |
540 | } | |
541 | tp = pp; | |
542 | status = reason = -1; | |
543 | jobflags = 0; | |
544 | do { | |
545 | jobflags |= pp->p_flags; | |
546 | pstatus = pp->p_flags & PALLSTATES; | |
547 | if (tp != pp && linp != linbuf && !(flag&FANCY) && | |
548 | (pstatus == status && pp->p_reason == reason || | |
549 | !(flag&REASON))) | |
550 | printf(" "); | |
551 | else { | |
552 | if (tp != pp && linp != linbuf) | |
553 | printf("\n"); | |
554 | if(flag&NUMBER) | |
555 | if (pp == tp) | |
556 | printf("[%d]%s %c ", pp->p_index, | |
557 | pp->p_index < 10 ? " " : "", | |
558 | pp==pcurrent ? '+' : | |
559 | (pp == pprevious ? '-' : ' ')); | |
560 | else | |
561 | printf(" "); | |
562 | if (flag&FANCY) | |
563 | printf("%5d ", pp->p_pid); | |
564 | if (flag&(REASON|AREASON)) { | |
565 | if (flag&NAME) | |
566 | format = "%-21s"; | |
567 | else | |
568 | format = "%s"; | |
569 | if (pstatus == status) | |
570 | if (pp->p_reason == reason) { | |
571 | printf(format, ""); | |
572 | goto prcomd; | |
573 | } else | |
574 | reason = pp->p_reason; | |
575 | else { | |
576 | status = pstatus; | |
577 | reason = pp->p_reason; | |
578 | } | |
579 | switch (status) { | |
580 | ||
581 | case PRUNNING: | |
582 | printf(format, "Running "); | |
583 | break; | |
584 | ||
585 | case PINTERRUPTED: | |
586 | case PSTOPPED: | |
587 | case PSIGNALED: | |
588 | if (flag&REASON || reason != SIGINT || | |
589 | reason != SIGPIPE) | |
590 | printf(format, mesg[pp->p_reason].pname); | |
591 | break; | |
592 | ||
593 | case PNEXITED: | |
594 | case PAEXITED: | |
595 | if (flag & REASON) | |
596 | if (pp->p_reason) | |
597 | printf("Exit %-16d", pp->p_reason); | |
598 | else | |
599 | printf(format, "Done"); | |
600 | break; | |
601 | ||
602 | default: | |
603 | printf("BUG: status=%-9o", status); | |
604 | } | |
605 | } | |
606 | } | |
607 | prcomd: | |
608 | if (flag&NAME) { | |
609 | printf("%s", pp->p_command); | |
610 | if (pp->p_flags & PPOU) | |
611 | printf(" |"); | |
612 | if (pp->p_flags & PDIAG) | |
613 | printf("&"); | |
614 | } | |
615 | if (flag&(REASON|AREASON) && pp->p_flags&PDUMPED) | |
616 | printf(" (core dumped)"); | |
617 | if (tp == pp->p_friends) { | |
618 | if (flag&ERSAND) | |
619 | printf(" &"); | |
620 | if (flag&JOBDIR && | |
621 | !eq(tp->p_cwd->di_name, dcwd->di_name)) { | |
622 | printf(" (wd: "); | |
623 | dtildepr(value("home"), tp->p_cwd->di_name); | |
624 | printf(")"); | |
625 | } | |
626 | } | |
627 | if (pp->p_flags&PPTIME && !(status&(PSTOPPED|PRUNNING))) { | |
628 | if (linp != linbuf) | |
629 | printf("\n\t"); | |
ea775389 | 630 | { static struct rusage zru; |
ae3d9709 SL |
631 | prusage(&zru, &pp->p_rusage, &pp->p_etime, |
632 | &pp->p_btime); | |
ea775389 | 633 | } |
2d4bbda8 BJ |
634 | } |
635 | if (tp == pp->p_friends) { | |
636 | if (linp != linbuf) | |
637 | printf("\n"); | |
638 | if (flag&SHELLDIR && !eq(tp->p_cwd->di_name, dcwd->di_name)) { | |
639 | printf("(wd now: "); | |
640 | dtildepr(value("home"), dcwd->di_name); | |
641 | printf(")\n"); | |
642 | } | |
643 | } | |
644 | } while ((pp = pp->p_friends) != tp); | |
645 | if (jobflags&PTIME && (jobflags&(PSTOPPED|PRUNNING)) == 0) { | |
646 | if (jobflags & NUMBER) | |
647 | printf(" "); | |
648 | ptprint(tp); | |
649 | } | |
650 | return (jobflags); | |
651 | } | |
652 | ||
653 | ptprint(tp) | |
654 | register struct process *tp; | |
655 | { | |
ae3d9709 SL |
656 | struct timeval tetime, diff; |
657 | static struct timeval ztime; | |
ea775389 SL |
658 | struct rusage ru; |
659 | static struct rusage zru; | |
2d4bbda8 BJ |
660 | register struct process *pp = tp; |
661 | ||
ea775389 | 662 | ru = zru; |
ae3d9709 | 663 | tetime = ztime; |
2d4bbda8 | 664 | do { |
ea775389 | 665 | ruadd(&ru, &pp->p_rusage); |
ae3d9709 SL |
666 | tvsub(&diff, &pp->p_etime, &pp->p_btime); |
667 | if (timercmp(&diff, &tetime, >)) | |
668 | tetime = diff; | |
2d4bbda8 | 669 | } while ((pp = pp->p_friends) != tp); |
ae3d9709 | 670 | prusage(&zru, &ru, &tetime, &ztime); |
2d4bbda8 BJ |
671 | } |
672 | ||
673 | /* | |
674 | * dojobs - print all jobs | |
675 | */ | |
676 | dojobs(v) | |
677 | char **v; | |
678 | { | |
679 | register struct process *pp; | |
680 | register int flag = NUMBER|NAME|REASON; | |
681 | int i; | |
682 | ||
683 | if (chkstop) | |
684 | chkstop = 2; | |
685 | if (*++v) { | |
686 | if (v[1] || !eq(*v, "-l")) | |
687 | error("Usage: jobs [ -l ]"); | |
688 | flag |= FANCY|JOBDIR; | |
689 | } | |
690 | for (i = 1; i <= pmaxindex; i++) | |
691 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
692 | if (pp->p_index == i && pp->p_pid == pp->p_jobid) { | |
693 | pp->p_flags &= ~PNEEDNOTE; | |
694 | if (!(pprint(pp, flag) & (PRUNNING|PSTOPPED))) | |
695 | pflush(pp); | |
696 | break; | |
697 | } | |
698 | } | |
699 | ||
700 | /* | |
701 | * dofg - builtin - put the job into the foreground | |
702 | */ | |
703 | dofg(v) | |
704 | char **v; | |
705 | { | |
706 | register struct process *pp; | |
707 | ||
708 | okpcntl(); | |
709 | ++v; | |
710 | do { | |
711 | pp = pfind(*v); | |
712 | pstart(pp, 1); | |
2d4bbda8 BJ |
713 | pjwait(pp); |
714 | } while (*v && *++v); | |
715 | } | |
716 | ||
717 | /* | |
718 | * %... - builtin - put the job into the foreground | |
719 | */ | |
720 | dofg1(v) | |
721 | char **v; | |
722 | { | |
723 | register struct process *pp; | |
724 | ||
725 | okpcntl(); | |
726 | pp = pfind(v[0]); | |
727 | pstart(pp, 1); | |
2d4bbda8 BJ |
728 | pjwait(pp); |
729 | } | |
730 | ||
731 | /* | |
732 | * dobg - builtin - put the job into the background | |
733 | */ | |
734 | dobg(v) | |
735 | char **v; | |
736 | { | |
737 | register struct process *pp; | |
738 | ||
739 | okpcntl(); | |
740 | ++v; | |
741 | do { | |
742 | pp = pfind(*v); | |
743 | pstart(pp, 0); | |
744 | } while (*v && *++v); | |
745 | } | |
746 | ||
747 | /* | |
748 | * %... & - builtin - put the job into the background | |
749 | */ | |
750 | dobg1(v) | |
751 | char **v; | |
752 | { | |
753 | register struct process *pp; | |
754 | ||
755 | pp = pfind(v[0]); | |
756 | pstart(pp, 0); | |
757 | } | |
758 | ||
759 | /* | |
760 | * dostop - builtin - stop the job | |
761 | */ | |
762 | dostop(v) | |
763 | char **v; | |
764 | { | |
765 | ||
766 | pkill(++v, SIGSTOP); | |
767 | } | |
768 | ||
769 | /* | |
770 | * dokill - builtin - superset of kill (1) | |
771 | */ | |
772 | dokill(v) | |
773 | char **v; | |
774 | { | |
775 | register int signum; | |
776 | register char *name; | |
777 | ||
778 | v++; | |
779 | if (v[0] && v[0][0] == '-') { | |
780 | if (v[0][1] == 'l') { | |
781 | for (signum = 1; signum <= NSIG; signum++) { | |
782 | if (name = mesg[signum].iname) | |
783 | printf("%s ", name); | |
784 | if (signum == 16) | |
35371dec | 785 | putchar('\n'); |
2d4bbda8 | 786 | } |
35371dec | 787 | putchar('\n'); |
2d4bbda8 BJ |
788 | return; |
789 | } | |
790 | if (digit(v[0][1])) { | |
791 | signum = atoi(v[0]+1); | |
792 | if (signum < 1 || signum > NSIG) | |
793 | bferr("Bad signal number"); | |
794 | } else { | |
795 | name = &v[0][1]; | |
796 | for (signum = 1; signum <= NSIG; signum++) | |
797 | if (mesg[signum].iname && | |
798 | eq(name, mesg[signum].iname)) | |
799 | goto gotsig; | |
800 | setname(name); | |
801 | bferr("Unknown signal; kill -l lists signals"); | |
802 | } | |
803 | gotsig: | |
804 | v++; | |
805 | } else | |
806 | signum = SIGTERM; | |
807 | pkill(v, signum); | |
808 | } | |
809 | ||
810 | pkill(v, signum) | |
811 | char **v; | |
812 | int signum; | |
813 | { | |
814 | register struct process *pp, *np; | |
815 | register int jobflags = 0; | |
d33af40e | 816 | int omask, pid, err = 0; |
525f24a3 | 817 | char *cp; |
2d4bbda8 | 818 | extern char *sys_errlist[]; |
2d4bbda8 | 819 | |
d33af40e | 820 | omask = sigmask(SIGCHLD); |
2d4bbda8 | 821 | if (setintr) |
d33af40e RC |
822 | omask |= sigmask(SIGINT); |
823 | omask = sigblock(omask) & ~omask; | |
2d4bbda8 | 824 | while (*v) { |
525f24a3 SL |
825 | cp = globone(*v); |
826 | if (*cp == '%') { | |
827 | np = pp = pfind(cp); | |
2d4bbda8 BJ |
828 | do |
829 | jobflags |= np->p_flags; | |
830 | while ((np = np->p_friends) != pp); | |
831 | switch (signum) { | |
832 | ||
833 | case SIGSTOP: | |
834 | case SIGTSTP: | |
835 | case SIGTTIN: | |
836 | case SIGTTOU: | |
837 | if ((jobflags & PRUNNING) == 0) { | |
525f24a3 | 838 | printf("%s: Already stopped\n", cp); |
2d4bbda8 BJ |
839 | err++; |
840 | goto cont; | |
841 | } | |
842 | } | |
9f4aa2a3 KM |
843 | if (killpg(pp->p_jobid, signum) < 0) { |
844 | printf("%s: ", cp); | |
845 | printf("%s\n", sys_errlist[errno]); | |
846 | err++; | |
847 | } | |
2d4bbda8 | 848 | if (signum == SIGTERM || signum == SIGHUP) |
35371dec | 849 | (void) killpg(pp->p_jobid, SIGCONT); |
525f24a3 | 850 | } else if (!digit(*cp)) |
2d4bbda8 BJ |
851 | bferr("Arguments should be jobs or process id's"); |
852 | else { | |
525f24a3 | 853 | pid = atoi(cp); |
2d4bbda8 BJ |
854 | if (kill(pid, signum) < 0) { |
855 | printf("%d: ", pid); | |
856 | printf("%s\n", sys_errlist[errno]); | |
857 | err++; | |
858 | goto cont; | |
859 | } | |
860 | if (signum == SIGTERM || signum == SIGHUP) | |
35371dec | 861 | (void) kill(pid, SIGCONT); |
2d4bbda8 BJ |
862 | } |
863 | cont: | |
525f24a3 | 864 | xfree(cp); |
2d4bbda8 BJ |
865 | v++; |
866 | } | |
35371dec | 867 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
868 | if (err) |
869 | error(NOSTR); | |
870 | } | |
871 | ||
872 | /* | |
873 | * pstart - start the job in foreground/background | |
874 | */ | |
875 | pstart(pp, foregnd) | |
876 | register struct process *pp; | |
877 | int foregnd; | |
878 | { | |
879 | register struct process *np; | |
d33af40e | 880 | int omask, jobflags = 0; |
2d4bbda8 | 881 | |
d33af40e | 882 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 BJ |
883 | np = pp; |
884 | do { | |
885 | jobflags |= np->p_flags; | |
886 | if (np->p_flags&(PRUNNING|PSTOPPED)) { | |
887 | np->p_flags |= PRUNNING; | |
888 | np->p_flags &= ~PSTOPPED; | |
889 | if (foregnd) | |
890 | np->p_flags |= PFOREGND; | |
891 | else | |
892 | np->p_flags &= ~PFOREGND; | |
893 | } | |
894 | } while((np = np->p_friends) != pp); | |
a132d4ed BJ |
895 | if (!foregnd) |
896 | pclrcurr(pp); | |
35371dec | 897 | (void) pprint(pp, foregnd ? NAME|JOBDIR : NUMBER|NAME|AMPERSAND); |
2d4bbda8 | 898 | if (foregnd) |
35371dec | 899 | (void) ioctl(FSHTTY, TIOCSPGRP, (char *)&pp->p_jobid); |
2d4bbda8 | 900 | if (jobflags&PSTOPPED) |
35371dec EW |
901 | (void) killpg(pp->p_jobid, SIGCONT); |
902 | (void) sigsetmask(omask); | |
2d4bbda8 BJ |
903 | } |
904 | ||
905 | panystop(neednl) | |
906 | { | |
907 | register struct process *pp; | |
908 | ||
909 | chkstop = 2; | |
910 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
911 | if (pp->p_flags & PSTOPPED) | |
912 | error("\nThere are stopped jobs" + 1 - neednl); | |
913 | } | |
914 | ||
915 | struct process * | |
916 | pfind(cp) | |
917 | char *cp; | |
918 | { | |
919 | register struct process *pp, *np; | |
920 | ||
921 | if (cp == 0 || cp[1] == 0 || eq(cp, "%%") || eq(cp, "%+")) { | |
922 | if (pcurrent == PNULL) | |
923 | bferr("No current job"); | |
924 | return (pcurrent); | |
925 | } | |
926 | if (eq(cp, "%-") || eq(cp, "%#")) { | |
927 | if (pprevious == PNULL) | |
928 | bferr("No previous job"); | |
929 | return (pprevious); | |
930 | } | |
931 | if (digit(cp[1])) { | |
932 | int index = atoi(cp+1); | |
933 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
934 | if (pp->p_index == index && pp->p_pid == pp->p_jobid) | |
935 | return (pp); | |
936 | bferr("No such job"); | |
937 | } | |
938 | np = PNULL; | |
939 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
940 | if (pp->p_pid == pp->p_jobid) { | |
941 | if (cp[1] == '?') { | |
942 | register char *dp; | |
943 | for (dp = pp->p_command; *dp; dp++) { | |
944 | if (*dp != cp[2]) | |
945 | continue; | |
946 | if (prefix(cp+2, dp)) | |
947 | goto match; | |
948 | } | |
949 | } else if (prefix(cp+1, pp->p_command)) { | |
950 | match: | |
951 | if (np) | |
952 | bferr("Ambiguous"); | |
953 | np = pp; | |
954 | } | |
955 | } | |
956 | if (np) | |
957 | return (np); | |
958 | if (cp[1] == '?') | |
959 | bferr("No job matches pattern"); | |
960 | else | |
961 | bferr("No such job"); | |
35371dec | 962 | /*NOTREACHED*/ |
2d4bbda8 BJ |
963 | } |
964 | ||
965 | /* | |
a132d4ed | 966 | * pgetcurr - find most recent job that is not pp, preferably stopped |
2d4bbda8 BJ |
967 | */ |
968 | struct process * | |
969 | pgetcurr(pp) | |
970 | register struct process *pp; | |
971 | { | |
972 | register struct process *np; | |
a132d4ed | 973 | register struct process *xp = PNULL; |
2d4bbda8 BJ |
974 | |
975 | for (np = proclist.p_next; np; np = np->p_next) | |
976 | if (np != pcurrent && np != pp && np->p_pid && | |
977 | np->p_pid == np->p_jobid) { | |
a132d4ed BJ |
978 | if (np->p_flags & PSTOPPED) |
979 | return (np); | |
980 | if (xp == PNULL) | |
981 | xp = np; | |
2d4bbda8 | 982 | } |
a132d4ed | 983 | return (xp); |
2d4bbda8 BJ |
984 | } |
985 | ||
986 | /* | |
987 | * donotify - flag the job so as to report termination asynchronously | |
988 | */ | |
989 | donotify(v) | |
990 | char **v; | |
991 | { | |
992 | register struct process *pp; | |
993 | ||
994 | pp = pfind(*++v); | |
995 | pp->p_flags |= PNOTIFY; | |
996 | } | |
997 | ||
998 | /* | |
999 | * Do the fork and whatever should be done in the child side that | |
1000 | * should not be done if we are not forking at all (like for simple builtin's) | |
1001 | * Also do everything that needs any signals fiddled with in the parent side | |
1002 | * | |
1003 | * Wanttty tells whether process and/or tty pgrps are to be manipulated: | |
1004 | * -1: leave tty alone; inherit pgrp from parent | |
1005 | * 0: already have tty; manipulate process pgrps only | |
1006 | * 1: want to claim tty; manipulate process and tty pgrps | |
1007 | * It is usually just the value of tpgrp. | |
1008 | */ | |
1009 | pfork(t, wanttty) | |
1010 | struct command *t; /* command we are forking for */ | |
1011 | int wanttty; | |
1012 | { | |
1013 | register int pid; | |
1014 | bool ignint = 0; | |
d33af40e | 1015 | int pgrp, omask; |
2d4bbda8 BJ |
1016 | |
1017 | /* | |
1018 | * A child will be uninterruptible only under very special | |
1019 | * conditions. Remember that the semantics of '&' is | |
1020 | * implemented by disconnecting the process from the tty so | |
1021 | * signals do not need to ignored just for '&'. | |
1022 | * Thus signals are set to default action for children unless: | |
1023 | * we have had an "onintr -" (then specifically ignored) | |
1024 | * we are not playing with signals (inherit action) | |
1025 | */ | |
1026 | if (setintr) | |
1027 | ignint = (tpgrp == -1 && (t->t_dflg&FINT)) | |
1028 | || (gointr && eq(gointr, "-")); | |
1029 | /* | |
1030 | * Hold SIGCHLD until we have the process installed in our table. | |
1031 | */ | |
d33af40e | 1032 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 BJ |
1033 | while ((pid = fork()) < 0) |
1034 | if (setintr == 0) | |
1035 | sleep(FORKSLEEP); | |
1036 | else { | |
35371dec | 1037 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
1038 | error("No more processes"); |
1039 | } | |
1040 | if (pid == 0) { | |
1041 | settimes(); | |
1042 | pgrp = pcurrjob ? pcurrjob->p_jobid : getpid(); | |
1043 | pflushall(); | |
1044 | pcurrjob = PNULL; | |
2d4bbda8 BJ |
1045 | child++; |
1046 | if (setintr) { | |
1047 | setintr = 0; /* until I think otherwise */ | |
2d4bbda8 BJ |
1048 | /* |
1049 | * Children just get blown away on SIGINT, SIGQUIT | |
1050 | * unless "onintr -" seen. | |
1051 | */ | |
35371dec EW |
1052 | (void) signal(SIGINT, ignint ? SIG_IGN : SIG_DFL); |
1053 | (void) signal(SIGQUIT, ignint ? SIG_IGN : SIG_DFL); | |
2d4bbda8 BJ |
1054 | if (wanttty >= 0) { |
1055 | /* make stoppable */ | |
35371dec EW |
1056 | (void) signal(SIGTSTP, SIG_DFL); |
1057 | (void) signal(SIGTTIN, SIG_DFL); | |
1058 | (void) signal(SIGTTOU, SIG_DFL); | |
2d4bbda8 | 1059 | } |
35371dec | 1060 | (void) signal(SIGTERM, parterm); |
2d4bbda8 | 1061 | } else if (tpgrp == -1 && (t->t_dflg&FINT)) { |
35371dec EW |
1062 | (void) signal(SIGINT, SIG_IGN); |
1063 | (void) signal(SIGQUIT, SIG_IGN); | |
2d4bbda8 BJ |
1064 | } |
1065 | if (wanttty > 0) | |
35371dec | 1066 | (void) ioctl(FSHTTY, TIOCSPGRP, (char *)&pgrp); |
2d4bbda8 | 1067 | if (wanttty >= 0 && tpgrp >= 0) |
35371dec | 1068 | (void) setpgrp(0, pgrp); |
2d4bbda8 BJ |
1069 | if (tpgrp > 0) |
1070 | tpgrp = 0; /* gave tty away */ | |
1071 | /* | |
1072 | * Nohup and nice apply only to TCOM's but it would be | |
1073 | * nice (?!?) if you could say "nohup (foo;bar)" | |
1074 | * Then the parser would have to know about nice/nohup/time | |
1075 | */ | |
1076 | if (t->t_dflg & FNOHUP) | |
35371dec | 1077 | (void) signal(SIGHUP, SIG_IGN); |
d33af40e | 1078 | if (t->t_dflg & FNICE) |
1ab62557 JL |
1079 | (void) setpriority(PRIO_PROCESS, 0, |
1080 | getpriority(PRIO_PROCESS, 0) + t->t_nice); | |
2d4bbda8 BJ |
1081 | } else { |
1082 | palloc(pid, t); | |
35371dec | 1083 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
1084 | } |
1085 | ||
1086 | return (pid); | |
1087 | } | |
1088 | ||
1089 | okpcntl() | |
1090 | { | |
1091 | ||
1092 | if (tpgrp == -1) | |
1093 | error("No job control in this shell"); | |
1094 | if (tpgrp == 0) | |
1095 | error("No job control in subshells"); | |
1096 | } |