Commit | Line | Data |
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35371dec | 1 | #ifndef lint |
9f4aa2a3 | 2 | static char *sccsid = "@(#)proc.c 4.17 (Berkeley) %G%"; |
35371dec | 3 | #endif |
2d4bbda8 BJ |
4 | |
5 | #include "sh.h" | |
6 | #include "sh.dir.h" | |
7 | #include "sh.proc.h" | |
3ffa6b49 | 8 | #include <sys/wait.h> |
2d4bbda8 BJ |
9 | #include <sys/ioctl.h> |
10 | ||
11 | /* | |
12 | * C Shell - functions that manage processes, handling hanging, termination | |
13 | */ | |
14 | ||
15 | #define BIGINDEX 9 /* largest desirable job index */ | |
16 | ||
17 | /* | |
18 | * pchild - called at interrupt level by the SIGCHLD signal | |
19 | * indicating that at least one child has terminated or stopped | |
20 | * thus at least one wait system call will definitely return a | |
21 | * childs status. Top level routines (like pwait) must be sure | |
22 | * to mask interrupts when playing with the proclist data structures! | |
23 | */ | |
24 | pchild() | |
25 | { | |
26 | register struct process *pp; | |
27 | register struct process *fp; | |
28 | register int pid; | |
29 | union wait w; | |
30 | int jobflags; | |
ea775389 | 31 | struct rusage ru; |
2d4bbda8 | 32 | |
2d4bbda8 | 33 | loop: |
35371dec | 34 | pid = wait3(&w, (setintr ? WNOHANG|WUNTRACED:WNOHANG), &ru); |
2d4bbda8 BJ |
35 | if (pid <= 0) { |
36 | if (errno == EINTR) { | |
37 | errno = 0; | |
38 | goto loop; | |
39 | } | |
40 | pnoprocesses = pid == -1; | |
41 | return; | |
42 | } | |
43 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) | |
44 | if (pid == pp->p_pid) | |
45 | goto found; | |
46 | goto loop; | |
47 | found: | |
48 | if (pid == atoi(value("child"))) | |
49 | unsetv("child"); | |
50 | pp->p_flags &= ~(PRUNNING|PSTOPPED|PREPORTED); | |
51 | if (WIFSTOPPED(w)) { | |
52 | pp->p_flags |= PSTOPPED; | |
53 | pp->p_reason = w.w_stopsig; | |
54 | } else { | |
35371dec EW |
55 | if (pp->p_flags & (PTIME|PPTIME) || adrof("time")) |
56 | (void) gettimeofday(&pp->p_etime, (struct timezone *)0); | |
ea775389 | 57 | pp->p_rusage = ru; |
2d4bbda8 BJ |
58 | if (WIFSIGNALED(w)) { |
59 | if (w.w_termsig == SIGINT) | |
60 | pp->p_flags |= PINTERRUPTED; | |
61 | else | |
62 | pp->p_flags |= PSIGNALED; | |
63 | if (w.w_coredump) | |
64 | pp->p_flags |= PDUMPED; | |
65 | pp->p_reason = w.w_termsig; | |
66 | } else { | |
67 | pp->p_reason = w.w_retcode; | |
2d4bbda8 | 68 | if (pp->p_reason != 0) |
2d4bbda8 BJ |
69 | pp->p_flags |= PAEXITED; |
70 | else | |
71 | pp->p_flags |= PNEXITED; | |
72 | } | |
73 | } | |
74 | jobflags = 0; | |
75 | fp = pp; | |
76 | do { | |
77 | if ((fp->p_flags & (PPTIME|PRUNNING|PSTOPPED)) == 0 && | |
78 | !child && adrof("time") && | |
35371dec | 79 | fp->p_rusage.ru_utime.tv_sec+fp->p_rusage.ru_stime.tv_sec >= |
2d4bbda8 BJ |
80 | atoi(value("time"))) |
81 | fp->p_flags |= PTIME; | |
82 | jobflags |= fp->p_flags; | |
83 | } while ((fp = fp->p_friends) != pp); | |
84 | pp->p_flags &= ~PFOREGND; | |
85 | if (pp == pp->p_friends && (pp->p_flags & PPTIME)) { | |
86 | pp->p_flags &= ~PPTIME; | |
87 | pp->p_flags |= PTIME; | |
88 | } | |
89 | if ((jobflags & (PRUNNING|PREPORTED)) == 0) { | |
90 | fp = pp; | |
91 | do { | |
92 | if (fp->p_flags&PSTOPPED) | |
93 | fp->p_flags |= PREPORTED; | |
94 | } while((fp = fp->p_friends) != pp); | |
95 | while(fp->p_pid != fp->p_jobid) | |
96 | fp = fp->p_friends; | |
a132d4ed BJ |
97 | if (jobflags&PSTOPPED) { |
98 | if (pcurrent && pcurrent != fp) | |
99 | pprevious = pcurrent; | |
100 | pcurrent = fp; | |
101 | } else | |
102 | pclrcurr(fp); | |
2d4bbda8 | 103 | if (jobflags&PFOREGND) { |
2d4bbda8 BJ |
104 | if (jobflags & (PSIGNALED|PSTOPPED|PPTIME) || |
105 | #ifdef IIASA | |
106 | jobflags & PAEXITED || | |
107 | #endif | |
108 | !eq(dcwd->di_name, fp->p_cwd->di_name)) { | |
401149be | 109 | ; /* print in pjwait */ |
b3409321 BJ |
110 | } |
111 | /* | |
112 | else if ((jobflags & (PTIME|PSTOPPED)) == PTIME) | |
2d4bbda8 | 113 | ptprint(fp); |
b3409321 | 114 | */ |
2d4bbda8 BJ |
115 | } else { |
116 | if (jobflags&PNOTIFY || adrof("notify")) { | |
117 | printf("\215\n"); | |
35371dec | 118 | (void) pprint(pp, NUMBER|NAME|REASON); |
2d4bbda8 BJ |
119 | if ((jobflags&PSTOPPED) == 0) |
120 | pflush(pp); | |
121 | } else { | |
2d4bbda8 BJ |
122 | fp->p_flags |= PNEEDNOTE; |
123 | neednote++; | |
124 | } | |
125 | } | |
126 | } | |
127 | goto loop; | |
128 | } | |
129 | ||
130 | pnote() | |
131 | { | |
132 | register struct process *pp; | |
d33af40e | 133 | int flags, omask; |
2d4bbda8 BJ |
134 | |
135 | neednote = 0; | |
136 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) { | |
137 | if (pp->p_flags & PNEEDNOTE) { | |
d33af40e | 138 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 BJ |
139 | pp->p_flags &= ~PNEEDNOTE; |
140 | flags = pprint(pp, NUMBER|NAME|REASON); | |
141 | if ((flags&(PRUNNING|PSTOPPED)) == 0) | |
142 | pflush(pp); | |
35371dec | 143 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
144 | } |
145 | } | |
146 | } | |
147 | ||
148 | /* | |
149 | * pwait - wait for current job to terminate, maintaining integrity | |
150 | * of current and previous job indicators. | |
151 | */ | |
152 | pwait() | |
153 | { | |
154 | register struct process *fp, *pp; | |
d33af40e | 155 | int omask; |
2d4bbda8 BJ |
156 | |
157 | /* | |
158 | * Here's where dead procs get flushed. | |
159 | */ | |
d33af40e | 160 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 BJ |
161 | for (pp = (fp = &proclist)->p_next; pp != PNULL; pp = (fp = pp)->p_next) |
162 | if (pp->p_pid == 0) { | |
163 | fp->p_next = pp->p_next; | |
164 | xfree(pp->p_command); | |
165 | if (pp->p_cwd && --pp->p_cwd->di_count == 0) | |
166 | if (pp->p_cwd->di_next == 0) | |
167 | dfree(pp->p_cwd); | |
168 | xfree((char *)pp); | |
169 | pp = fp; | |
170 | } | |
35371dec | 171 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
172 | pjwait(pcurrjob); |
173 | } | |
174 | ||
175 | /* | |
176 | * pjwait - wait for a job to finish or become stopped | |
177 | * It is assumed to be in the foreground state (PFOREGND) | |
178 | */ | |
179 | pjwait(pp) | |
180 | register struct process *pp; | |
181 | { | |
182 | register struct process *fp; | |
d33af40e | 183 | int jobflags, reason, omask; |
d33af40e | 184 | |
525f24a3 SL |
185 | while (pp->p_pid != pp->p_jobid) |
186 | pp = pp->p_friends; | |
2d4bbda8 BJ |
187 | fp = pp; |
188 | do { | |
189 | if ((fp->p_flags&(PFOREGND|PRUNNING)) == PRUNNING) | |
190 | printf("BUG: waiting for background job!\n"); | |
191 | } while ((fp = fp->p_friends) != pp); | |
192 | /* | |
193 | * Now keep pausing as long as we are not interrupted (SIGINT), | |
194 | * and the target process, or any of its friends, are running | |
195 | */ | |
196 | fp = pp; | |
d33af40e | 197 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 | 198 | for (;;) { |
2d4bbda8 BJ |
199 | jobflags = 0; |
200 | do | |
201 | jobflags |= fp->p_flags; | |
d33af40e | 202 | while ((fp = (fp->p_friends)) != pp); |
2d4bbda8 BJ |
203 | if ((jobflags & PRUNNING) == 0) |
204 | break; | |
d33af40e | 205 | sigpause(0); |
2d4bbda8 | 206 | } |
35371dec EW |
207 | (void) sigsetmask(omask); |
208 | if (tpgrp > 0) /* get tty back */ | |
209 | (void) ioctl(FSHTTY, TIOCSPGRP, (char *)&tpgrp); | |
cd4a3dcb BJ |
210 | if ((jobflags&(PSIGNALED|PSTOPPED|PTIME)) || |
211 | !eq(dcwd->di_name, fp->p_cwd->di_name)) { | |
212 | if (jobflags&PSTOPPED) | |
213 | printf("\n"); | |
35371dec | 214 | (void) pprint(pp, AREASON|SHELLDIR); |
cd4a3dcb | 215 | } |
401149be | 216 | if ((jobflags&(PINTERRUPTED|PSTOPPED)) && setintr && |
2d4bbda8 | 217 | (!gointr || !eq(gointr, "-"))) { |
401149be BJ |
218 | if ((jobflags & PSTOPPED) == 0) |
219 | pflush(pp); | |
401149be | 220 | pintr1(0); |
2d4bbda8 BJ |
221 | /*NOTREACHED*/ |
222 | } | |
223 | reason = 0; | |
224 | fp = pp; | |
225 | do { | |
226 | if (fp->p_reason) | |
227 | reason = fp->p_flags & (PSIGNALED|PINTERRUPTED) ? | |
228 | fp->p_reason | QUOTE : fp->p_reason; | |
229 | } while ((fp = fp->p_friends) != pp); | |
230 | set("status", putn(reason)); | |
231 | if (reason && exiterr) | |
232 | exitstat(); | |
233 | pflush(pp); | |
234 | } | |
235 | ||
236 | /* | |
237 | * dowait - wait for all processes to finish | |
238 | */ | |
239 | dowait() | |
240 | { | |
241 | register struct process *pp; | |
d33af40e | 242 | int omask; |
2d4bbda8 BJ |
243 | |
244 | pjobs++; | |
d33af40e | 245 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 | 246 | loop: |
2d4bbda8 | 247 | for (pp = proclist.p_next; pp; pp = pp->p_next) |
525f24a3 | 248 | if (pp->p_pid && /* pp->p_pid == pp->p_jobid && */ |
2d4bbda8 | 249 | pp->p_flags&PRUNNING) { |
d33af40e | 250 | sigpause(0); |
2d4bbda8 BJ |
251 | goto loop; |
252 | } | |
35371dec | 253 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
254 | pjobs = 0; |
255 | } | |
256 | ||
257 | /* | |
258 | * pflushall - flush all jobs from list (e.g. at fork()) | |
259 | */ | |
260 | pflushall() | |
261 | { | |
262 | register struct process *pp; | |
263 | ||
264 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) | |
265 | if (pp->p_pid) | |
266 | pflush(pp); | |
267 | } | |
268 | ||
269 | /* | |
270 | * pflush - flag all process structures in the same job as the | |
271 | * the argument process for deletion. The actual free of the | |
272 | * space is not done here since pflush is called at interrupt level. | |
273 | */ | |
274 | pflush(pp) | |
275 | register struct process *pp; | |
276 | { | |
277 | register struct process *np; | |
278 | register int index; | |
279 | ||
280 | if (pp->p_pid == 0) { | |
281 | printf("BUG: process flushed twice"); | |
282 | return; | |
283 | } | |
284 | while (pp->p_pid != pp->p_jobid) | |
285 | pp = pp->p_friends; | |
286 | pclrcurr(pp); | |
287 | if (pp == pcurrjob) | |
288 | pcurrjob = 0; | |
289 | index = pp->p_index; | |
290 | np = pp; | |
291 | do { | |
292 | np->p_index = np->p_pid = 0; | |
293 | np->p_flags &= ~PNEEDNOTE; | |
294 | } while ((np = np->p_friends) != pp); | |
295 | if (index == pmaxindex) { | |
296 | for (np = proclist.p_next, index = 0; np; np = np->p_next) | |
297 | if (np->p_index > index) | |
298 | index = np->p_index; | |
299 | pmaxindex = index; | |
300 | } | |
301 | } | |
302 | ||
303 | /* | |
304 | * pclrcurr - make sure the given job is not the current or previous job; | |
305 | * pp MUST be the job leader | |
306 | */ | |
307 | pclrcurr(pp) | |
308 | register struct process *pp; | |
309 | { | |
310 | ||
311 | if (pp == pcurrent) | |
312 | if (pprevious != PNULL) { | |
313 | pcurrent = pprevious; | |
314 | pprevious = pgetcurr(pp); | |
315 | } else { | |
316 | pcurrent = pgetcurr(pp); | |
317 | pprevious = pgetcurr(pp); | |
318 | } | |
319 | else if (pp == pprevious) | |
320 | pprevious = pgetcurr(pp); | |
321 | } | |
322 | ||
323 | /* +4 here is 1 for '\0', 1 ea for << >& >> */ | |
324 | char command[PMAXLEN+4]; | |
325 | int cmdlen; | |
326 | char *cmdp; | |
327 | /* | |
328 | * palloc - allocate a process structure and fill it up. | |
329 | * an important assumption is made that the process is running. | |
330 | */ | |
331 | palloc(pid, t) | |
332 | int pid; | |
333 | register struct command *t; | |
334 | { | |
335 | register struct process *pp; | |
336 | int i; | |
337 | ||
338 | pp = (struct process *)calloc(1, sizeof(struct process)); | |
339 | pp->p_pid = pid; | |
340 | pp->p_flags = t->t_dflg & FAND ? PRUNNING : PRUNNING|PFOREGND; | |
341 | if (t->t_dflg & FTIME) | |
342 | pp->p_flags |= PPTIME; | |
343 | cmdp = command; | |
344 | cmdlen = 0; | |
345 | padd(t); | |
346 | *cmdp++ = 0; | |
347 | if (t->t_dflg & FPOU) { | |
348 | pp->p_flags |= PPOU; | |
349 | if (t->t_dflg & FDIAG) | |
350 | pp->p_flags |= PDIAG; | |
351 | } | |
352 | pp->p_command = savestr(command); | |
353 | if (pcurrjob) { | |
354 | struct process *fp; | |
355 | /* careful here with interrupt level */ | |
356 | pp->p_cwd = 0; | |
357 | pp->p_index = pcurrjob->p_index; | |
358 | pp->p_friends = pcurrjob; | |
359 | pp->p_jobid = pcurrjob->p_pid; | |
360 | for (fp = pcurrjob; fp->p_friends != pcurrjob; fp = fp->p_friends) | |
361 | ; | |
362 | fp->p_friends = pp; | |
363 | } else { | |
364 | pcurrjob = pp; | |
365 | pp->p_jobid = pid; | |
366 | pp->p_friends = pp; | |
367 | pp->p_cwd = dcwd; | |
368 | dcwd->di_count++; | |
369 | if (pmaxindex < BIGINDEX) | |
370 | pp->p_index = ++pmaxindex; | |
371 | else { | |
372 | struct process *np; | |
373 | ||
374 | for (i = 1; ; i++) { | |
375 | for (np = proclist.p_next; np; np = np->p_next) | |
376 | if (np->p_index == i) | |
377 | goto tryagain; | |
a132d4ed BJ |
378 | pp->p_index = i; |
379 | if (i > pmaxindex) | |
380 | pmaxindex = i; | |
2d4bbda8 BJ |
381 | break; |
382 | tryagain:; | |
383 | } | |
384 | } | |
385 | if (pcurrent == PNULL) | |
386 | pcurrent = pp; | |
387 | else if (pprevious == PNULL) | |
388 | pprevious = pp; | |
389 | } | |
390 | pp->p_next = proclist.p_next; | |
391 | proclist.p_next = pp; | |
35371dec | 392 | (void) gettimeofday(&pp->p_btime, (struct timezone *)0); |
2d4bbda8 BJ |
393 | } |
394 | ||
395 | padd(t) | |
396 | register struct command *t; | |
397 | { | |
398 | char **argp; | |
399 | ||
400 | if (t == 0) | |
401 | return; | |
402 | switch (t->t_dtyp) { | |
403 | ||
404 | case TPAR: | |
405 | pads("( "); | |
406 | padd(t->t_dspr); | |
407 | pads(" )"); | |
408 | break; | |
409 | ||
410 | case TCOM: | |
411 | for (argp = t->t_dcom; *argp; argp++) { | |
412 | pads(*argp); | |
413 | if (argp[1]) | |
414 | pads(" "); | |
415 | } | |
416 | break; | |
417 | ||
1544707d EW |
418 | case TOR: |
419 | case TAND: | |
2d4bbda8 | 420 | case TFIL: |
2d4bbda8 BJ |
421 | case TLST: |
422 | padd(t->t_dcar); | |
1544707d EW |
423 | switch (t->t_dtyp) { |
424 | case TOR: | |
425 | pads(" || "); | |
426 | break; | |
427 | case TAND: | |
428 | pads(" && "); | |
429 | break; | |
430 | case TFIL: | |
431 | pads(" | "); | |
432 | break; | |
433 | case TLST: | |
434 | pads("; "); | |
435 | break; | |
436 | } | |
2d4bbda8 BJ |
437 | padd(t->t_dcdr); |
438 | return; | |
439 | } | |
440 | if ((t->t_dflg & FPIN) == 0 && t->t_dlef) { | |
441 | pads((t->t_dflg & FHERE) ? " << " : " < "); | |
442 | pads(t->t_dlef); | |
443 | } | |
444 | if ((t->t_dflg & FPOU) == 0 && t->t_drit) { | |
445 | pads((t->t_dflg & FCAT) ? " >>" : " >"); | |
446 | if (t->t_dflg & FDIAG) | |
447 | pads("&"); | |
448 | pads(" "); | |
449 | pads(t->t_drit); | |
450 | } | |
451 | } | |
452 | ||
453 | pads(cp) | |
454 | char *cp; | |
455 | { | |
456 | register int i = strlen(cp); | |
457 | ||
458 | if (cmdlen >= PMAXLEN) | |
459 | return; | |
460 | if (cmdlen + i >= PMAXLEN) { | |
35371dec | 461 | (void) strcpy(cmdp, " ..."); |
2d4bbda8 BJ |
462 | cmdlen = PMAXLEN; |
463 | cmdp += 4; | |
464 | return; | |
465 | } | |
35371dec | 466 | (void) strcpy(cmdp, cp); |
2d4bbda8 BJ |
467 | cmdp += i; |
468 | cmdlen += i; | |
469 | } | |
470 | ||
471 | /* | |
472 | * psavejob - temporarily save the current job on a one level stack | |
473 | * so another job can be created. Used for { } in exp6 | |
474 | * and `` in globbing. | |
475 | */ | |
476 | psavejob() | |
477 | { | |
478 | ||
479 | pholdjob = pcurrjob; | |
480 | pcurrjob = PNULL; | |
481 | } | |
482 | ||
483 | /* | |
484 | * prestjob - opposite of psavejob. This may be missed if we are interrupted | |
485 | * somewhere, but pendjob cleans up anyway. | |
486 | */ | |
487 | prestjob() | |
488 | { | |
489 | ||
490 | pcurrjob = pholdjob; | |
491 | pholdjob = PNULL; | |
492 | } | |
493 | ||
494 | /* | |
495 | * pendjob - indicate that a job (set of commands) has been completed | |
496 | * or is about to begin. | |
497 | */ | |
498 | pendjob() | |
499 | { | |
500 | register struct process *pp, *tp; | |
501 | ||
502 | if (pcurrjob && (pcurrjob->p_flags&(PFOREGND|PSTOPPED)) == 0) { | |
503 | pp = pcurrjob; | |
504 | while (pp->p_pid != pp->p_jobid) | |
505 | pp = pp->p_friends; | |
506 | printf("[%d]", pp->p_index); | |
507 | tp = pp; | |
508 | do { | |
509 | printf(" %d", pp->p_pid); | |
510 | pp = pp->p_friends; | |
511 | } while (pp != tp); | |
512 | printf("\n"); | |
513 | } | |
514 | pholdjob = pcurrjob = 0; | |
515 | } | |
516 | ||
517 | /* | |
518 | * pprint - print a job | |
519 | */ | |
520 | pprint(pp, flag) | |
521 | register struct process *pp; | |
522 | { | |
523 | register status, reason; | |
524 | struct process *tp; | |
525 | extern char *linp, linbuf[]; | |
526 | int jobflags, pstatus; | |
527 | char *format; | |
528 | ||
529 | while (pp->p_pid != pp->p_jobid) | |
530 | pp = pp->p_friends; | |
531 | if (pp == pp->p_friends && (pp->p_flags & PPTIME)) { | |
532 | pp->p_flags &= ~PPTIME; | |
533 | pp->p_flags |= PTIME; | |
534 | } | |
535 | tp = pp; | |
536 | status = reason = -1; | |
537 | jobflags = 0; | |
538 | do { | |
539 | jobflags |= pp->p_flags; | |
540 | pstatus = pp->p_flags & PALLSTATES; | |
541 | if (tp != pp && linp != linbuf && !(flag&FANCY) && | |
542 | (pstatus == status && pp->p_reason == reason || | |
543 | !(flag&REASON))) | |
544 | printf(" "); | |
545 | else { | |
546 | if (tp != pp && linp != linbuf) | |
547 | printf("\n"); | |
548 | if(flag&NUMBER) | |
549 | if (pp == tp) | |
550 | printf("[%d]%s %c ", pp->p_index, | |
551 | pp->p_index < 10 ? " " : "", | |
552 | pp==pcurrent ? '+' : | |
553 | (pp == pprevious ? '-' : ' ')); | |
554 | else | |
555 | printf(" "); | |
556 | if (flag&FANCY) | |
557 | printf("%5d ", pp->p_pid); | |
558 | if (flag&(REASON|AREASON)) { | |
559 | if (flag&NAME) | |
560 | format = "%-21s"; | |
561 | else | |
562 | format = "%s"; | |
563 | if (pstatus == status) | |
564 | if (pp->p_reason == reason) { | |
565 | printf(format, ""); | |
566 | goto prcomd; | |
567 | } else | |
568 | reason = pp->p_reason; | |
569 | else { | |
570 | status = pstatus; | |
571 | reason = pp->p_reason; | |
572 | } | |
573 | switch (status) { | |
574 | ||
575 | case PRUNNING: | |
576 | printf(format, "Running "); | |
577 | break; | |
578 | ||
579 | case PINTERRUPTED: | |
580 | case PSTOPPED: | |
581 | case PSIGNALED: | |
582 | if (flag&REASON || reason != SIGINT || | |
583 | reason != SIGPIPE) | |
584 | printf(format, mesg[pp->p_reason].pname); | |
585 | break; | |
586 | ||
587 | case PNEXITED: | |
588 | case PAEXITED: | |
589 | if (flag & REASON) | |
590 | if (pp->p_reason) | |
591 | printf("Exit %-16d", pp->p_reason); | |
592 | else | |
593 | printf(format, "Done"); | |
594 | break; | |
595 | ||
596 | default: | |
597 | printf("BUG: status=%-9o", status); | |
598 | } | |
599 | } | |
600 | } | |
601 | prcomd: | |
602 | if (flag&NAME) { | |
603 | printf("%s", pp->p_command); | |
604 | if (pp->p_flags & PPOU) | |
605 | printf(" |"); | |
606 | if (pp->p_flags & PDIAG) | |
607 | printf("&"); | |
608 | } | |
609 | if (flag&(REASON|AREASON) && pp->p_flags&PDUMPED) | |
610 | printf(" (core dumped)"); | |
611 | if (tp == pp->p_friends) { | |
612 | if (flag&ERSAND) | |
613 | printf(" &"); | |
614 | if (flag&JOBDIR && | |
615 | !eq(tp->p_cwd->di_name, dcwd->di_name)) { | |
616 | printf(" (wd: "); | |
617 | dtildepr(value("home"), tp->p_cwd->di_name); | |
618 | printf(")"); | |
619 | } | |
620 | } | |
621 | if (pp->p_flags&PPTIME && !(status&(PSTOPPED|PRUNNING))) { | |
622 | if (linp != linbuf) | |
623 | printf("\n\t"); | |
ea775389 | 624 | { static struct rusage zru; |
ae3d9709 SL |
625 | prusage(&zru, &pp->p_rusage, &pp->p_etime, |
626 | &pp->p_btime); | |
ea775389 | 627 | } |
2d4bbda8 BJ |
628 | } |
629 | if (tp == pp->p_friends) { | |
630 | if (linp != linbuf) | |
631 | printf("\n"); | |
632 | if (flag&SHELLDIR && !eq(tp->p_cwd->di_name, dcwd->di_name)) { | |
633 | printf("(wd now: "); | |
634 | dtildepr(value("home"), dcwd->di_name); | |
635 | printf(")\n"); | |
636 | } | |
637 | } | |
638 | } while ((pp = pp->p_friends) != tp); | |
639 | if (jobflags&PTIME && (jobflags&(PSTOPPED|PRUNNING)) == 0) { | |
640 | if (jobflags & NUMBER) | |
641 | printf(" "); | |
642 | ptprint(tp); | |
643 | } | |
644 | return (jobflags); | |
645 | } | |
646 | ||
647 | ptprint(tp) | |
648 | register struct process *tp; | |
649 | { | |
ae3d9709 SL |
650 | struct timeval tetime, diff; |
651 | static struct timeval ztime; | |
ea775389 SL |
652 | struct rusage ru; |
653 | static struct rusage zru; | |
2d4bbda8 BJ |
654 | register struct process *pp = tp; |
655 | ||
ea775389 | 656 | ru = zru; |
ae3d9709 | 657 | tetime = ztime; |
2d4bbda8 | 658 | do { |
ea775389 | 659 | ruadd(&ru, &pp->p_rusage); |
ae3d9709 SL |
660 | tvsub(&diff, &pp->p_etime, &pp->p_btime); |
661 | if (timercmp(&diff, &tetime, >)) | |
662 | tetime = diff; | |
2d4bbda8 | 663 | } while ((pp = pp->p_friends) != tp); |
ae3d9709 | 664 | prusage(&zru, &ru, &tetime, &ztime); |
2d4bbda8 BJ |
665 | } |
666 | ||
667 | /* | |
668 | * dojobs - print all jobs | |
669 | */ | |
670 | dojobs(v) | |
671 | char **v; | |
672 | { | |
673 | register struct process *pp; | |
674 | register int flag = NUMBER|NAME|REASON; | |
675 | int i; | |
676 | ||
677 | if (chkstop) | |
678 | chkstop = 2; | |
679 | if (*++v) { | |
680 | if (v[1] || !eq(*v, "-l")) | |
681 | error("Usage: jobs [ -l ]"); | |
682 | flag |= FANCY|JOBDIR; | |
683 | } | |
684 | for (i = 1; i <= pmaxindex; i++) | |
685 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
686 | if (pp->p_index == i && pp->p_pid == pp->p_jobid) { | |
687 | pp->p_flags &= ~PNEEDNOTE; | |
688 | if (!(pprint(pp, flag) & (PRUNNING|PSTOPPED))) | |
689 | pflush(pp); | |
690 | break; | |
691 | } | |
692 | } | |
693 | ||
694 | /* | |
695 | * dofg - builtin - put the job into the foreground | |
696 | */ | |
697 | dofg(v) | |
698 | char **v; | |
699 | { | |
700 | register struct process *pp; | |
701 | ||
702 | okpcntl(); | |
703 | ++v; | |
704 | do { | |
705 | pp = pfind(*v); | |
706 | pstart(pp, 1); | |
2d4bbda8 BJ |
707 | pjwait(pp); |
708 | } while (*v && *++v); | |
709 | } | |
710 | ||
711 | /* | |
712 | * %... - builtin - put the job into the foreground | |
713 | */ | |
714 | dofg1(v) | |
715 | char **v; | |
716 | { | |
717 | register struct process *pp; | |
718 | ||
719 | okpcntl(); | |
720 | pp = pfind(v[0]); | |
721 | pstart(pp, 1); | |
2d4bbda8 BJ |
722 | pjwait(pp); |
723 | } | |
724 | ||
725 | /* | |
726 | * dobg - builtin - put the job into the background | |
727 | */ | |
728 | dobg(v) | |
729 | char **v; | |
730 | { | |
731 | register struct process *pp; | |
732 | ||
733 | okpcntl(); | |
734 | ++v; | |
735 | do { | |
736 | pp = pfind(*v); | |
737 | pstart(pp, 0); | |
738 | } while (*v && *++v); | |
739 | } | |
740 | ||
741 | /* | |
742 | * %... & - builtin - put the job into the background | |
743 | */ | |
744 | dobg1(v) | |
745 | char **v; | |
746 | { | |
747 | register struct process *pp; | |
748 | ||
749 | pp = pfind(v[0]); | |
750 | pstart(pp, 0); | |
751 | } | |
752 | ||
753 | /* | |
754 | * dostop - builtin - stop the job | |
755 | */ | |
756 | dostop(v) | |
757 | char **v; | |
758 | { | |
759 | ||
760 | pkill(++v, SIGSTOP); | |
761 | } | |
762 | ||
763 | /* | |
764 | * dokill - builtin - superset of kill (1) | |
765 | */ | |
766 | dokill(v) | |
767 | char **v; | |
768 | { | |
769 | register int signum; | |
770 | register char *name; | |
771 | ||
772 | v++; | |
773 | if (v[0] && v[0][0] == '-') { | |
774 | if (v[0][1] == 'l') { | |
775 | for (signum = 1; signum <= NSIG; signum++) { | |
776 | if (name = mesg[signum].iname) | |
777 | printf("%s ", name); | |
778 | if (signum == 16) | |
35371dec | 779 | putchar('\n'); |
2d4bbda8 | 780 | } |
35371dec | 781 | putchar('\n'); |
2d4bbda8 BJ |
782 | return; |
783 | } | |
784 | if (digit(v[0][1])) { | |
785 | signum = atoi(v[0]+1); | |
786 | if (signum < 1 || signum > NSIG) | |
787 | bferr("Bad signal number"); | |
788 | } else { | |
789 | name = &v[0][1]; | |
790 | for (signum = 1; signum <= NSIG; signum++) | |
791 | if (mesg[signum].iname && | |
792 | eq(name, mesg[signum].iname)) | |
793 | goto gotsig; | |
794 | setname(name); | |
795 | bferr("Unknown signal; kill -l lists signals"); | |
796 | } | |
797 | gotsig: | |
798 | v++; | |
799 | } else | |
800 | signum = SIGTERM; | |
801 | pkill(v, signum); | |
802 | } | |
803 | ||
804 | pkill(v, signum) | |
805 | char **v; | |
806 | int signum; | |
807 | { | |
808 | register struct process *pp, *np; | |
809 | register int jobflags = 0; | |
d33af40e | 810 | int omask, pid, err = 0; |
525f24a3 | 811 | char *cp; |
2d4bbda8 | 812 | extern char *sys_errlist[]; |
2d4bbda8 | 813 | |
d33af40e | 814 | omask = sigmask(SIGCHLD); |
2d4bbda8 | 815 | if (setintr) |
d33af40e RC |
816 | omask |= sigmask(SIGINT); |
817 | omask = sigblock(omask) & ~omask; | |
2d4bbda8 | 818 | while (*v) { |
525f24a3 SL |
819 | cp = globone(*v); |
820 | if (*cp == '%') { | |
821 | np = pp = pfind(cp); | |
2d4bbda8 BJ |
822 | do |
823 | jobflags |= np->p_flags; | |
824 | while ((np = np->p_friends) != pp); | |
825 | switch (signum) { | |
826 | ||
827 | case SIGSTOP: | |
828 | case SIGTSTP: | |
829 | case SIGTTIN: | |
830 | case SIGTTOU: | |
831 | if ((jobflags & PRUNNING) == 0) { | |
525f24a3 | 832 | printf("%s: Already stopped\n", cp); |
2d4bbda8 BJ |
833 | err++; |
834 | goto cont; | |
835 | } | |
836 | } | |
9f4aa2a3 KM |
837 | if (killpg(pp->p_jobid, signum) < 0) { |
838 | printf("%s: ", cp); | |
839 | printf("%s\n", sys_errlist[errno]); | |
840 | err++; | |
841 | } | |
2d4bbda8 | 842 | if (signum == SIGTERM || signum == SIGHUP) |
35371dec | 843 | (void) killpg(pp->p_jobid, SIGCONT); |
525f24a3 | 844 | } else if (!digit(*cp)) |
2d4bbda8 BJ |
845 | bferr("Arguments should be jobs or process id's"); |
846 | else { | |
525f24a3 | 847 | pid = atoi(cp); |
2d4bbda8 BJ |
848 | if (kill(pid, signum) < 0) { |
849 | printf("%d: ", pid); | |
850 | printf("%s\n", sys_errlist[errno]); | |
851 | err++; | |
852 | goto cont; | |
853 | } | |
854 | if (signum == SIGTERM || signum == SIGHUP) | |
35371dec | 855 | (void) kill(pid, SIGCONT); |
2d4bbda8 BJ |
856 | } |
857 | cont: | |
525f24a3 | 858 | xfree(cp); |
2d4bbda8 BJ |
859 | v++; |
860 | } | |
35371dec | 861 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
862 | if (err) |
863 | error(NOSTR); | |
864 | } | |
865 | ||
866 | /* | |
867 | * pstart - start the job in foreground/background | |
868 | */ | |
869 | pstart(pp, foregnd) | |
870 | register struct process *pp; | |
871 | int foregnd; | |
872 | { | |
873 | register struct process *np; | |
d33af40e | 874 | int omask, jobflags = 0; |
2d4bbda8 | 875 | |
d33af40e | 876 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 BJ |
877 | np = pp; |
878 | do { | |
879 | jobflags |= np->p_flags; | |
880 | if (np->p_flags&(PRUNNING|PSTOPPED)) { | |
881 | np->p_flags |= PRUNNING; | |
882 | np->p_flags &= ~PSTOPPED; | |
883 | if (foregnd) | |
884 | np->p_flags |= PFOREGND; | |
885 | else | |
886 | np->p_flags &= ~PFOREGND; | |
887 | } | |
888 | } while((np = np->p_friends) != pp); | |
a132d4ed BJ |
889 | if (!foregnd) |
890 | pclrcurr(pp); | |
35371dec | 891 | (void) pprint(pp, foregnd ? NAME|JOBDIR : NUMBER|NAME|AMPERSAND); |
2d4bbda8 | 892 | if (foregnd) |
35371dec | 893 | (void) ioctl(FSHTTY, TIOCSPGRP, (char *)&pp->p_jobid); |
2d4bbda8 | 894 | if (jobflags&PSTOPPED) |
35371dec EW |
895 | (void) killpg(pp->p_jobid, SIGCONT); |
896 | (void) sigsetmask(omask); | |
2d4bbda8 BJ |
897 | } |
898 | ||
899 | panystop(neednl) | |
900 | { | |
901 | register struct process *pp; | |
902 | ||
903 | chkstop = 2; | |
904 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
905 | if (pp->p_flags & PSTOPPED) | |
906 | error("\nThere are stopped jobs" + 1 - neednl); | |
907 | } | |
908 | ||
909 | struct process * | |
910 | pfind(cp) | |
911 | char *cp; | |
912 | { | |
913 | register struct process *pp, *np; | |
914 | ||
915 | if (cp == 0 || cp[1] == 0 || eq(cp, "%%") || eq(cp, "%+")) { | |
916 | if (pcurrent == PNULL) | |
917 | bferr("No current job"); | |
918 | return (pcurrent); | |
919 | } | |
920 | if (eq(cp, "%-") || eq(cp, "%#")) { | |
921 | if (pprevious == PNULL) | |
922 | bferr("No previous job"); | |
923 | return (pprevious); | |
924 | } | |
925 | if (digit(cp[1])) { | |
926 | int index = atoi(cp+1); | |
927 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
928 | if (pp->p_index == index && pp->p_pid == pp->p_jobid) | |
929 | return (pp); | |
930 | bferr("No such job"); | |
931 | } | |
932 | np = PNULL; | |
933 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
934 | if (pp->p_pid == pp->p_jobid) { | |
935 | if (cp[1] == '?') { | |
936 | register char *dp; | |
937 | for (dp = pp->p_command; *dp; dp++) { | |
938 | if (*dp != cp[2]) | |
939 | continue; | |
940 | if (prefix(cp+2, dp)) | |
941 | goto match; | |
942 | } | |
943 | } else if (prefix(cp+1, pp->p_command)) { | |
944 | match: | |
945 | if (np) | |
946 | bferr("Ambiguous"); | |
947 | np = pp; | |
948 | } | |
949 | } | |
950 | if (np) | |
951 | return (np); | |
952 | if (cp[1] == '?') | |
953 | bferr("No job matches pattern"); | |
954 | else | |
955 | bferr("No such job"); | |
35371dec | 956 | /*NOTREACHED*/ |
2d4bbda8 BJ |
957 | } |
958 | ||
959 | /* | |
a132d4ed | 960 | * pgetcurr - find most recent job that is not pp, preferably stopped |
2d4bbda8 BJ |
961 | */ |
962 | struct process * | |
963 | pgetcurr(pp) | |
964 | register struct process *pp; | |
965 | { | |
966 | register struct process *np; | |
a132d4ed | 967 | register struct process *xp = PNULL; |
2d4bbda8 BJ |
968 | |
969 | for (np = proclist.p_next; np; np = np->p_next) | |
970 | if (np != pcurrent && np != pp && np->p_pid && | |
971 | np->p_pid == np->p_jobid) { | |
a132d4ed BJ |
972 | if (np->p_flags & PSTOPPED) |
973 | return (np); | |
974 | if (xp == PNULL) | |
975 | xp = np; | |
2d4bbda8 | 976 | } |
a132d4ed | 977 | return (xp); |
2d4bbda8 BJ |
978 | } |
979 | ||
980 | /* | |
981 | * donotify - flag the job so as to report termination asynchronously | |
982 | */ | |
983 | donotify(v) | |
984 | char **v; | |
985 | { | |
986 | register struct process *pp; | |
987 | ||
988 | pp = pfind(*++v); | |
989 | pp->p_flags |= PNOTIFY; | |
990 | } | |
991 | ||
992 | /* | |
993 | * Do the fork and whatever should be done in the child side that | |
994 | * should not be done if we are not forking at all (like for simple builtin's) | |
995 | * Also do everything that needs any signals fiddled with in the parent side | |
996 | * | |
997 | * Wanttty tells whether process and/or tty pgrps are to be manipulated: | |
998 | * -1: leave tty alone; inherit pgrp from parent | |
999 | * 0: already have tty; manipulate process pgrps only | |
1000 | * 1: want to claim tty; manipulate process and tty pgrps | |
1001 | * It is usually just the value of tpgrp. | |
1002 | */ | |
1003 | pfork(t, wanttty) | |
1004 | struct command *t; /* command we are forking for */ | |
1005 | int wanttty; | |
1006 | { | |
1007 | register int pid; | |
1008 | bool ignint = 0; | |
d33af40e | 1009 | int pgrp, omask; |
2d4bbda8 BJ |
1010 | |
1011 | /* | |
1012 | * A child will be uninterruptible only under very special | |
1013 | * conditions. Remember that the semantics of '&' is | |
1014 | * implemented by disconnecting the process from the tty so | |
1015 | * signals do not need to ignored just for '&'. | |
1016 | * Thus signals are set to default action for children unless: | |
1017 | * we have had an "onintr -" (then specifically ignored) | |
1018 | * we are not playing with signals (inherit action) | |
1019 | */ | |
1020 | if (setintr) | |
1021 | ignint = (tpgrp == -1 && (t->t_dflg&FINT)) | |
1022 | || (gointr && eq(gointr, "-")); | |
1023 | /* | |
1024 | * Hold SIGCHLD until we have the process installed in our table. | |
1025 | */ | |
d33af40e | 1026 | omask = sigblock(sigmask(SIGCHLD)); |
2d4bbda8 BJ |
1027 | while ((pid = fork()) < 0) |
1028 | if (setintr == 0) | |
1029 | sleep(FORKSLEEP); | |
1030 | else { | |
35371dec | 1031 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
1032 | error("No more processes"); |
1033 | } | |
1034 | if (pid == 0) { | |
1035 | settimes(); | |
1036 | pgrp = pcurrjob ? pcurrjob->p_jobid : getpid(); | |
1037 | pflushall(); | |
1038 | pcurrjob = PNULL; | |
2d4bbda8 BJ |
1039 | child++; |
1040 | if (setintr) { | |
1041 | setintr = 0; /* until I think otherwise */ | |
2d4bbda8 BJ |
1042 | /* |
1043 | * Children just get blown away on SIGINT, SIGQUIT | |
1044 | * unless "onintr -" seen. | |
1045 | */ | |
35371dec EW |
1046 | (void) signal(SIGINT, ignint ? SIG_IGN : SIG_DFL); |
1047 | (void) signal(SIGQUIT, ignint ? SIG_IGN : SIG_DFL); | |
2d4bbda8 BJ |
1048 | if (wanttty >= 0) { |
1049 | /* make stoppable */ | |
35371dec EW |
1050 | (void) signal(SIGTSTP, SIG_DFL); |
1051 | (void) signal(SIGTTIN, SIG_DFL); | |
1052 | (void) signal(SIGTTOU, SIG_DFL); | |
2d4bbda8 | 1053 | } |
35371dec | 1054 | (void) signal(SIGTERM, parterm); |
2d4bbda8 | 1055 | } else if (tpgrp == -1 && (t->t_dflg&FINT)) { |
35371dec EW |
1056 | (void) signal(SIGINT, SIG_IGN); |
1057 | (void) signal(SIGQUIT, SIG_IGN); | |
2d4bbda8 BJ |
1058 | } |
1059 | if (wanttty > 0) | |
35371dec | 1060 | (void) ioctl(FSHTTY, TIOCSPGRP, (char *)&pgrp); |
2d4bbda8 | 1061 | if (wanttty >= 0 && tpgrp >= 0) |
35371dec | 1062 | (void) setpgrp(0, pgrp); |
2d4bbda8 BJ |
1063 | if (tpgrp > 0) |
1064 | tpgrp = 0; /* gave tty away */ | |
1065 | /* | |
1066 | * Nohup and nice apply only to TCOM's but it would be | |
1067 | * nice (?!?) if you could say "nohup (foo;bar)" | |
1068 | * Then the parser would have to know about nice/nohup/time | |
1069 | */ | |
1070 | if (t->t_dflg & FNOHUP) | |
35371dec | 1071 | (void) signal(SIGHUP, SIG_IGN); |
d33af40e | 1072 | if (t->t_dflg & FNICE) |
35371dec | 1073 | (void) setpriority(PRIO_PROCESS, 0, t->t_nice); |
2d4bbda8 BJ |
1074 | } else { |
1075 | palloc(pid, t); | |
35371dec | 1076 | (void) sigsetmask(omask); |
2d4bbda8 BJ |
1077 | } |
1078 | ||
1079 | return (pid); | |
1080 | } | |
1081 | ||
1082 | okpcntl() | |
1083 | { | |
1084 | ||
1085 | if (tpgrp == -1) | |
1086 | error("No job control in this shell"); | |
1087 | if (tpgrp == 0) | |
1088 | error("No job control in subshells"); | |
1089 | } |