Commit | Line | Data |
---|---|---|
b3409321 | 1 | static char *sccsid = "@(#)proc.c 4.6 (Berkeley) 81/05/03"; |
2d4bbda8 BJ |
2 | |
3 | #include "sh.h" | |
4 | #include "sh.dir.h" | |
5 | #include "sh.proc.h" | |
6 | #include <wait.h> | |
7 | #include <sys/ioctl.h> | |
8 | ||
9 | /* | |
10 | * C Shell - functions that manage processes, handling hanging, termination | |
11 | */ | |
12 | ||
13 | #define BIGINDEX 9 /* largest desirable job index */ | |
14 | ||
15 | /* | |
16 | * pchild - called at interrupt level by the SIGCHLD signal | |
17 | * indicating that at least one child has terminated or stopped | |
18 | * thus at least one wait system call will definitely return a | |
19 | * childs status. Top level routines (like pwait) must be sure | |
20 | * to mask interrupts when playing with the proclist data structures! | |
21 | */ | |
22 | pchild() | |
23 | { | |
24 | register struct process *pp; | |
25 | register struct process *fp; | |
26 | register int pid; | |
27 | union wait w; | |
28 | int jobflags; | |
29 | #ifdef VMUNIX | |
30 | struct vtimes vt; | |
31 | #endif | |
32 | ||
33 | if (!timesdone) | |
34 | timesdone++, times(&shtimes); | |
35 | loop: | |
36 | pid = wait3(&w.w_status, (setintr ? WNOHANG|WUNTRACED:WNOHANG), | |
37 | #ifndef VMUNIX | |
38 | 0); | |
39 | #else | |
40 | &vt); | |
41 | #endif | |
42 | if (pid <= 0) { | |
43 | if (errno == EINTR) { | |
44 | errno = 0; | |
45 | goto loop; | |
46 | } | |
47 | pnoprocesses = pid == -1; | |
48 | return; | |
49 | } | |
50 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) | |
51 | if (pid == pp->p_pid) | |
52 | goto found; | |
53 | goto loop; | |
54 | found: | |
55 | if (pid == atoi(value("child"))) | |
56 | unsetv("child"); | |
57 | pp->p_flags &= ~(PRUNNING|PSTOPPED|PREPORTED); | |
58 | if (WIFSTOPPED(w)) { | |
59 | pp->p_flags |= PSTOPPED; | |
60 | pp->p_reason = w.w_stopsig; | |
61 | } else { | |
62 | if (pp->p_flags & (PTIME|PPTIME) || adrof("time")) { | |
63 | time_t oldcutimes, oldcstimes; | |
64 | oldcutimes = shtimes.tms_cutime; | |
65 | oldcstimes = shtimes.tms_cstime; | |
66 | time(&pp->p_etime); | |
67 | times(&shtimes); | |
68 | pp->p_utime = shtimes.tms_cutime - oldcutimes; | |
69 | pp->p_stime = shtimes.tms_cstime - oldcstimes; | |
70 | } else | |
71 | times(&shtimes); | |
72 | #ifdef VMUNIX | |
73 | pp->p_vtimes = vt; | |
74 | #endif | |
75 | if (WIFSIGNALED(w)) { | |
76 | if (w.w_termsig == SIGINT) | |
77 | pp->p_flags |= PINTERRUPTED; | |
78 | else | |
79 | pp->p_flags |= PSIGNALED; | |
80 | if (w.w_coredump) | |
81 | pp->p_flags |= PDUMPED; | |
82 | pp->p_reason = w.w_termsig; | |
83 | } else { | |
84 | pp->p_reason = w.w_retcode; | |
85 | #ifdef IIASA | |
86 | if (pp->p_reason >= 3) | |
87 | #else | |
88 | if (pp->p_reason != 0) | |
89 | #endif | |
90 | pp->p_flags |= PAEXITED; | |
91 | else | |
92 | pp->p_flags |= PNEXITED; | |
93 | } | |
94 | } | |
95 | jobflags = 0; | |
96 | fp = pp; | |
97 | do { | |
98 | if ((fp->p_flags & (PPTIME|PRUNNING|PSTOPPED)) == 0 && | |
99 | !child && adrof("time") && | |
100 | (fp->p_utime + fp->p_stime) / HZ >= | |
101 | atoi(value("time"))) | |
102 | fp->p_flags |= PTIME; | |
103 | jobflags |= fp->p_flags; | |
104 | } while ((fp = fp->p_friends) != pp); | |
105 | pp->p_flags &= ~PFOREGND; | |
106 | if (pp == pp->p_friends && (pp->p_flags & PPTIME)) { | |
107 | pp->p_flags &= ~PPTIME; | |
108 | pp->p_flags |= PTIME; | |
109 | } | |
110 | if ((jobflags & (PRUNNING|PREPORTED)) == 0) { | |
111 | fp = pp; | |
112 | do { | |
113 | if (fp->p_flags&PSTOPPED) | |
114 | fp->p_flags |= PREPORTED; | |
115 | } while((fp = fp->p_friends) != pp); | |
116 | while(fp->p_pid != fp->p_jobid) | |
117 | fp = fp->p_friends; | |
a132d4ed BJ |
118 | if (jobflags&PSTOPPED) { |
119 | if (pcurrent && pcurrent != fp) | |
120 | pprevious = pcurrent; | |
121 | pcurrent = fp; | |
122 | } else | |
123 | pclrcurr(fp); | |
2d4bbda8 | 124 | if (jobflags&PFOREGND) { |
2d4bbda8 BJ |
125 | if (jobflags & (PSIGNALED|PSTOPPED|PPTIME) || |
126 | #ifdef IIASA | |
127 | jobflags & PAEXITED || | |
128 | #endif | |
129 | !eq(dcwd->di_name, fp->p_cwd->di_name)) { | |
401149be | 130 | ; /* print in pjwait */ |
b3409321 BJ |
131 | } |
132 | /* | |
133 | else if ((jobflags & (PTIME|PSTOPPED)) == PTIME) | |
2d4bbda8 | 134 | ptprint(fp); |
b3409321 | 135 | */ |
2d4bbda8 BJ |
136 | } else { |
137 | if (jobflags&PNOTIFY || adrof("notify")) { | |
138 | printf("\215\n"); | |
139 | pprint(pp, NUMBER|NAME|REASON); | |
140 | if ((jobflags&PSTOPPED) == 0) | |
141 | pflush(pp); | |
142 | } else { | |
2d4bbda8 BJ |
143 | fp->p_flags |= PNEEDNOTE; |
144 | neednote++; | |
145 | } | |
146 | } | |
147 | } | |
148 | goto loop; | |
149 | } | |
150 | ||
151 | pnote() | |
152 | { | |
153 | register struct process *pp; | |
154 | int flags; | |
155 | ||
156 | neednote = 0; | |
157 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) { | |
158 | if (pp->p_flags & PNEEDNOTE) { | |
159 | sighold(SIGCHLD); | |
160 | pp->p_flags &= ~PNEEDNOTE; | |
161 | flags = pprint(pp, NUMBER|NAME|REASON); | |
162 | if ((flags&(PRUNNING|PSTOPPED)) == 0) | |
163 | pflush(pp); | |
164 | sigrelse(SIGCHLD); | |
165 | } | |
166 | } | |
167 | } | |
168 | ||
169 | /* | |
170 | * pwait - wait for current job to terminate, maintaining integrity | |
171 | * of current and previous job indicators. | |
172 | */ | |
173 | pwait() | |
174 | { | |
175 | register struct process *fp, *pp; | |
176 | ||
177 | /* | |
178 | * Here's where dead procs get flushed. | |
179 | */ | |
180 | sighold(SIGCHLD); | |
181 | for (pp = (fp = &proclist)->p_next; pp != PNULL; pp = (fp = pp)->p_next) | |
182 | if (pp->p_pid == 0) { | |
183 | fp->p_next = pp->p_next; | |
184 | xfree(pp->p_command); | |
185 | if (pp->p_cwd && --pp->p_cwd->di_count == 0) | |
186 | if (pp->p_cwd->di_next == 0) | |
187 | dfree(pp->p_cwd); | |
188 | xfree((char *)pp); | |
189 | pp = fp; | |
190 | } | |
191 | sigrelse(SIGCHLD); | |
192 | if (setintr) | |
193 | sigignore(SIGINT); | |
194 | pjwait(pcurrjob); | |
195 | } | |
196 | ||
197 | /* | |
198 | * pjwait - wait for a job to finish or become stopped | |
199 | * It is assumed to be in the foreground state (PFOREGND) | |
200 | */ | |
201 | pjwait(pp) | |
202 | register struct process *pp; | |
203 | { | |
204 | register struct process *fp; | |
205 | int jobflags, reason; | |
206 | ||
207 | fp = pp; | |
208 | do { | |
209 | if ((fp->p_flags&(PFOREGND|PRUNNING)) == PRUNNING) | |
210 | printf("BUG: waiting for background job!\n"); | |
211 | } while ((fp = fp->p_friends) != pp); | |
212 | /* | |
213 | * Now keep pausing as long as we are not interrupted (SIGINT), | |
214 | * and the target process, or any of its friends, are running | |
215 | */ | |
216 | fp = pp; | |
217 | for (;;) { | |
218 | sighold(SIGCHLD); | |
219 | jobflags = 0; | |
220 | do | |
221 | jobflags |= fp->p_flags; | |
222 | while((fp = (fp->p_friends)) != pp); | |
223 | if ((jobflags & PRUNNING) == 0) | |
224 | break; | |
225 | sigpause(SIGCHLD); | |
226 | } | |
227 | sigrelse(SIGCHLD); | |
228 | if (tpgrp > 0) | |
229 | ioctl(FSHTTY, TIOCSPGRP, &tpgrp); /* get tty back */ | |
cd4a3dcb BJ |
230 | if ((jobflags&(PSIGNALED|PSTOPPED|PTIME)) || |
231 | !eq(dcwd->di_name, fp->p_cwd->di_name)) { | |
232 | if (jobflags&PSTOPPED) | |
233 | printf("\n"); | |
234 | pprint(pp, AREASON|SHELLDIR); | |
235 | } | |
401149be | 236 | if ((jobflags&(PINTERRUPTED|PSTOPPED)) && setintr && |
2d4bbda8 | 237 | (!gointr || !eq(gointr, "-"))) { |
401149be BJ |
238 | if ((jobflags & PSTOPPED) == 0) |
239 | pflush(pp); | |
401149be | 240 | pintr1(0); |
2d4bbda8 BJ |
241 | /*NOTREACHED*/ |
242 | } | |
243 | reason = 0; | |
244 | fp = pp; | |
245 | do { | |
246 | if (fp->p_reason) | |
247 | reason = fp->p_flags & (PSIGNALED|PINTERRUPTED) ? | |
248 | fp->p_reason | QUOTE : fp->p_reason; | |
249 | } while ((fp = fp->p_friends) != pp); | |
250 | set("status", putn(reason)); | |
251 | if (reason && exiterr) | |
252 | exitstat(); | |
253 | pflush(pp); | |
254 | } | |
255 | ||
256 | /* | |
257 | * dowait - wait for all processes to finish | |
258 | */ | |
259 | dowait() | |
260 | { | |
261 | register struct process *pp; | |
262 | ||
263 | pjobs++; | |
264 | if (setintr) | |
265 | sigrelse(SIGINT); | |
266 | loop: | |
267 | sighold(SIGCHLD); | |
268 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
269 | if (pp->p_pid && pp->p_pid == pp->p_jobid && | |
270 | pp->p_flags&PRUNNING) { | |
271 | sigpause(SIGCHLD); | |
272 | goto loop; | |
273 | } | |
274 | sigrelse(SIGCHLD); | |
275 | pjobs = 0; | |
276 | } | |
277 | ||
278 | /* | |
279 | * pflushall - flush all jobs from list (e.g. at fork()) | |
280 | */ | |
281 | pflushall() | |
282 | { | |
283 | register struct process *pp; | |
284 | ||
285 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) | |
286 | if (pp->p_pid) | |
287 | pflush(pp); | |
288 | } | |
289 | ||
290 | /* | |
291 | * pflush - flag all process structures in the same job as the | |
292 | * the argument process for deletion. The actual free of the | |
293 | * space is not done here since pflush is called at interrupt level. | |
294 | */ | |
295 | pflush(pp) | |
296 | register struct process *pp; | |
297 | { | |
298 | register struct process *np; | |
299 | register int index; | |
300 | ||
301 | if (pp->p_pid == 0) { | |
302 | printf("BUG: process flushed twice"); | |
303 | return; | |
304 | } | |
305 | while (pp->p_pid != pp->p_jobid) | |
306 | pp = pp->p_friends; | |
307 | pclrcurr(pp); | |
308 | if (pp == pcurrjob) | |
309 | pcurrjob = 0; | |
310 | index = pp->p_index; | |
311 | np = pp; | |
312 | do { | |
313 | np->p_index = np->p_pid = 0; | |
314 | np->p_flags &= ~PNEEDNOTE; | |
315 | } while ((np = np->p_friends) != pp); | |
316 | if (index == pmaxindex) { | |
317 | for (np = proclist.p_next, index = 0; np; np = np->p_next) | |
318 | if (np->p_index > index) | |
319 | index = np->p_index; | |
320 | pmaxindex = index; | |
321 | } | |
322 | } | |
323 | ||
324 | /* | |
325 | * pclrcurr - make sure the given job is not the current or previous job; | |
326 | * pp MUST be the job leader | |
327 | */ | |
328 | pclrcurr(pp) | |
329 | register struct process *pp; | |
330 | { | |
331 | ||
332 | if (pp == pcurrent) | |
333 | if (pprevious != PNULL) { | |
334 | pcurrent = pprevious; | |
335 | pprevious = pgetcurr(pp); | |
336 | } else { | |
337 | pcurrent = pgetcurr(pp); | |
338 | pprevious = pgetcurr(pp); | |
339 | } | |
340 | else if (pp == pprevious) | |
341 | pprevious = pgetcurr(pp); | |
342 | } | |
343 | ||
344 | /* +4 here is 1 for '\0', 1 ea for << >& >> */ | |
345 | char command[PMAXLEN+4]; | |
346 | int cmdlen; | |
347 | char *cmdp; | |
348 | /* | |
349 | * palloc - allocate a process structure and fill it up. | |
350 | * an important assumption is made that the process is running. | |
351 | */ | |
352 | palloc(pid, t) | |
353 | int pid; | |
354 | register struct command *t; | |
355 | { | |
356 | register struct process *pp; | |
357 | int i; | |
358 | ||
359 | pp = (struct process *)calloc(1, sizeof(struct process)); | |
360 | pp->p_pid = pid; | |
361 | pp->p_flags = t->t_dflg & FAND ? PRUNNING : PRUNNING|PFOREGND; | |
362 | if (t->t_dflg & FTIME) | |
363 | pp->p_flags |= PPTIME; | |
364 | cmdp = command; | |
365 | cmdlen = 0; | |
366 | padd(t); | |
367 | *cmdp++ = 0; | |
368 | if (t->t_dflg & FPOU) { | |
369 | pp->p_flags |= PPOU; | |
370 | if (t->t_dflg & FDIAG) | |
371 | pp->p_flags |= PDIAG; | |
372 | } | |
373 | pp->p_command = savestr(command); | |
374 | if (pcurrjob) { | |
375 | struct process *fp; | |
376 | /* careful here with interrupt level */ | |
377 | pp->p_cwd = 0; | |
378 | pp->p_index = pcurrjob->p_index; | |
379 | pp->p_friends = pcurrjob; | |
380 | pp->p_jobid = pcurrjob->p_pid; | |
381 | for (fp = pcurrjob; fp->p_friends != pcurrjob; fp = fp->p_friends) | |
382 | ; | |
383 | fp->p_friends = pp; | |
384 | } else { | |
385 | pcurrjob = pp; | |
386 | pp->p_jobid = pid; | |
387 | pp->p_friends = pp; | |
388 | pp->p_cwd = dcwd; | |
389 | dcwd->di_count++; | |
390 | if (pmaxindex < BIGINDEX) | |
391 | pp->p_index = ++pmaxindex; | |
392 | else { | |
393 | struct process *np; | |
394 | ||
395 | for (i = 1; ; i++) { | |
396 | for (np = proclist.p_next; np; np = np->p_next) | |
397 | if (np->p_index == i) | |
398 | goto tryagain; | |
a132d4ed BJ |
399 | pp->p_index = i; |
400 | if (i > pmaxindex) | |
401 | pmaxindex = i; | |
2d4bbda8 BJ |
402 | break; |
403 | tryagain:; | |
404 | } | |
405 | } | |
406 | if (pcurrent == PNULL) | |
407 | pcurrent = pp; | |
408 | else if (pprevious == PNULL) | |
409 | pprevious = pp; | |
410 | } | |
411 | pp->p_next = proclist.p_next; | |
412 | proclist.p_next = pp; | |
413 | time(&pp->p_btime); | |
414 | } | |
415 | ||
416 | padd(t) | |
417 | register struct command *t; | |
418 | { | |
419 | char **argp; | |
420 | ||
421 | if (t == 0) | |
422 | return; | |
423 | switch (t->t_dtyp) { | |
424 | ||
425 | case TPAR: | |
426 | pads("( "); | |
427 | padd(t->t_dspr); | |
428 | pads(" )"); | |
429 | break; | |
430 | ||
431 | case TCOM: | |
432 | for (argp = t->t_dcom; *argp; argp++) { | |
433 | pads(*argp); | |
434 | if (argp[1]) | |
435 | pads(" "); | |
436 | } | |
437 | break; | |
438 | ||
439 | case TFIL: | |
440 | padd(t->t_dcar); | |
441 | pads(" | "); | |
442 | padd(t->t_dcdr); | |
443 | return; | |
444 | ||
445 | case TLST: | |
446 | padd(t->t_dcar); | |
447 | pads("; "); | |
448 | padd(t->t_dcdr); | |
449 | return; | |
450 | } | |
451 | if ((t->t_dflg & FPIN) == 0 && t->t_dlef) { | |
452 | pads((t->t_dflg & FHERE) ? " << " : " < "); | |
453 | pads(t->t_dlef); | |
454 | } | |
455 | if ((t->t_dflg & FPOU) == 0 && t->t_drit) { | |
456 | pads((t->t_dflg & FCAT) ? " >>" : " >"); | |
457 | if (t->t_dflg & FDIAG) | |
458 | pads("&"); | |
459 | pads(" "); | |
460 | pads(t->t_drit); | |
461 | } | |
462 | } | |
463 | ||
464 | pads(cp) | |
465 | char *cp; | |
466 | { | |
467 | register int i = strlen(cp); | |
468 | ||
469 | if (cmdlen >= PMAXLEN) | |
470 | return; | |
471 | if (cmdlen + i >= PMAXLEN) { | |
472 | strcpy(cmdp, " ..."); | |
473 | cmdlen = PMAXLEN; | |
474 | cmdp += 4; | |
475 | return; | |
476 | } | |
477 | strcpy(cmdp, cp); | |
478 | cmdp += i; | |
479 | cmdlen += i; | |
480 | } | |
481 | ||
482 | /* | |
483 | * psavejob - temporarily save the current job on a one level stack | |
484 | * so another job can be created. Used for { } in exp6 | |
485 | * and `` in globbing. | |
486 | */ | |
487 | psavejob() | |
488 | { | |
489 | ||
490 | pholdjob = pcurrjob; | |
491 | pcurrjob = PNULL; | |
492 | } | |
493 | ||
494 | /* | |
495 | * prestjob - opposite of psavejob. This may be missed if we are interrupted | |
496 | * somewhere, but pendjob cleans up anyway. | |
497 | */ | |
498 | prestjob() | |
499 | { | |
500 | ||
501 | pcurrjob = pholdjob; | |
502 | pholdjob = PNULL; | |
503 | } | |
504 | ||
505 | /* | |
506 | * pendjob - indicate that a job (set of commands) has been completed | |
507 | * or is about to begin. | |
508 | */ | |
509 | pendjob() | |
510 | { | |
511 | register struct process *pp, *tp; | |
512 | ||
513 | if (pcurrjob && (pcurrjob->p_flags&(PFOREGND|PSTOPPED)) == 0) { | |
514 | pp = pcurrjob; | |
515 | while (pp->p_pid != pp->p_jobid) | |
516 | pp = pp->p_friends; | |
517 | printf("[%d]", pp->p_index); | |
518 | tp = pp; | |
519 | do { | |
520 | printf(" %d", pp->p_pid); | |
521 | pp = pp->p_friends; | |
522 | } while (pp != tp); | |
523 | printf("\n"); | |
524 | } | |
525 | pholdjob = pcurrjob = 0; | |
526 | } | |
527 | ||
528 | /* | |
529 | * pprint - print a job | |
530 | */ | |
531 | pprint(pp, flag) | |
532 | register struct process *pp; | |
533 | { | |
534 | register status, reason; | |
535 | struct process *tp; | |
536 | extern char *linp, linbuf[]; | |
537 | int jobflags, pstatus; | |
538 | char *format; | |
539 | ||
540 | while (pp->p_pid != pp->p_jobid) | |
541 | pp = pp->p_friends; | |
542 | if (pp == pp->p_friends && (pp->p_flags & PPTIME)) { | |
543 | pp->p_flags &= ~PPTIME; | |
544 | pp->p_flags |= PTIME; | |
545 | } | |
546 | tp = pp; | |
547 | status = reason = -1; | |
548 | jobflags = 0; | |
549 | do { | |
550 | jobflags |= pp->p_flags; | |
551 | pstatus = pp->p_flags & PALLSTATES; | |
552 | if (tp != pp && linp != linbuf && !(flag&FANCY) && | |
553 | (pstatus == status && pp->p_reason == reason || | |
554 | !(flag&REASON))) | |
555 | printf(" "); | |
556 | else { | |
557 | if (tp != pp && linp != linbuf) | |
558 | printf("\n"); | |
559 | if(flag&NUMBER) | |
560 | if (pp == tp) | |
561 | printf("[%d]%s %c ", pp->p_index, | |
562 | pp->p_index < 10 ? " " : "", | |
563 | pp==pcurrent ? '+' : | |
564 | (pp == pprevious ? '-' : ' ')); | |
565 | else | |
566 | printf(" "); | |
567 | if (flag&FANCY) | |
568 | printf("%5d ", pp->p_pid); | |
569 | if (flag&(REASON|AREASON)) { | |
570 | if (flag&NAME) | |
571 | format = "%-21s"; | |
572 | else | |
573 | format = "%s"; | |
574 | if (pstatus == status) | |
575 | if (pp->p_reason == reason) { | |
576 | printf(format, ""); | |
577 | goto prcomd; | |
578 | } else | |
579 | reason = pp->p_reason; | |
580 | else { | |
581 | status = pstatus; | |
582 | reason = pp->p_reason; | |
583 | } | |
584 | switch (status) { | |
585 | ||
586 | case PRUNNING: | |
587 | printf(format, "Running "); | |
588 | break; | |
589 | ||
590 | case PINTERRUPTED: | |
591 | case PSTOPPED: | |
592 | case PSIGNALED: | |
593 | if (flag&REASON || reason != SIGINT || | |
594 | reason != SIGPIPE) | |
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"); | |
635 | #ifndef VMUNIX | |
636 | ptimes(pp->p_utime, pp->p_stime, pp->p_etime-pp->p_btime); | |
637 | #else | |
638 | pvtimes(&zvms, &pp->p_vtimes, pp->p_etime - pp->p_btime); | |
639 | #endif | |
640 | } | |
641 | if (tp == pp->p_friends) { | |
642 | if (linp != linbuf) | |
643 | printf("\n"); | |
644 | if (flag&SHELLDIR && !eq(tp->p_cwd->di_name, dcwd->di_name)) { | |
645 | printf("(wd now: "); | |
646 | dtildepr(value("home"), dcwd->di_name); | |
647 | printf(")\n"); | |
648 | } | |
649 | } | |
650 | } while ((pp = pp->p_friends) != tp); | |
651 | if (jobflags&PTIME && (jobflags&(PSTOPPED|PRUNNING)) == 0) { | |
652 | if (jobflags & NUMBER) | |
653 | printf(" "); | |
654 | ptprint(tp); | |
655 | } | |
656 | return (jobflags); | |
657 | } | |
658 | ||
659 | ptprint(tp) | |
660 | register struct process *tp; | |
661 | { | |
662 | time_t tetime = 0; | |
663 | #ifdef VMUNIX | |
664 | struct vtimes vmt; | |
665 | #else | |
666 | time_t tutime = 0, tstime = 0; | |
667 | #endif | |
668 | register struct process *pp = tp; | |
669 | ||
670 | vmt = zvms; | |
671 | do { | |
672 | #ifdef VMUNIX | |
673 | vmsadd(&vmt, &pp->p_vtimes); | |
674 | #else | |
675 | tutime += pp->p_utime; | |
676 | tstime += pp->p_stime; | |
677 | #endif | |
678 | if (pp->p_etime - pp->p_btime > tetime) | |
679 | tetime = pp->p_etime - pp->p_btime; | |
680 | } while ((pp = pp->p_friends) != tp); | |
681 | #ifdef VMUNIX | |
682 | pvtimes(&zvms, &vmt, tetime); | |
683 | #else | |
684 | ptimes(tutime, tstime, tetime); | |
685 | #endif | |
686 | } | |
687 | ||
688 | /* | |
689 | * dojobs - print all jobs | |
690 | */ | |
691 | dojobs(v) | |
692 | char **v; | |
693 | { | |
694 | register struct process *pp; | |
695 | register int flag = NUMBER|NAME|REASON; | |
696 | int i; | |
697 | ||
698 | if (chkstop) | |
699 | chkstop = 2; | |
700 | if (*++v) { | |
701 | if (v[1] || !eq(*v, "-l")) | |
702 | error("Usage: jobs [ -l ]"); | |
703 | flag |= FANCY|JOBDIR; | |
704 | } | |
705 | for (i = 1; i <= pmaxindex; i++) | |
706 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
707 | if (pp->p_index == i && pp->p_pid == pp->p_jobid) { | |
708 | pp->p_flags &= ~PNEEDNOTE; | |
709 | if (!(pprint(pp, flag) & (PRUNNING|PSTOPPED))) | |
710 | pflush(pp); | |
711 | break; | |
712 | } | |
713 | } | |
714 | ||
715 | /* | |
716 | * dofg - builtin - put the job into the foreground | |
717 | */ | |
718 | dofg(v) | |
719 | char **v; | |
720 | { | |
721 | register struct process *pp; | |
722 | ||
723 | okpcntl(); | |
724 | ++v; | |
725 | do { | |
726 | pp = pfind(*v); | |
727 | pstart(pp, 1); | |
728 | if (setintr) | |
729 | sigignore(SIGINT); | |
730 | pjwait(pp); | |
731 | } while (*v && *++v); | |
732 | } | |
733 | ||
734 | /* | |
735 | * %... - builtin - put the job into the foreground | |
736 | */ | |
737 | dofg1(v) | |
738 | char **v; | |
739 | { | |
740 | register struct process *pp; | |
741 | ||
742 | okpcntl(); | |
743 | pp = pfind(v[0]); | |
744 | pstart(pp, 1); | |
745 | if (setintr) | |
746 | sigignore(SIGINT); | |
747 | pjwait(pp); | |
748 | } | |
749 | ||
750 | /* | |
751 | * dobg - builtin - put the job into the background | |
752 | */ | |
753 | dobg(v) | |
754 | char **v; | |
755 | { | |
756 | register struct process *pp; | |
757 | ||
758 | okpcntl(); | |
759 | ++v; | |
760 | do { | |
761 | pp = pfind(*v); | |
762 | pstart(pp, 0); | |
763 | } while (*v && *++v); | |
764 | } | |
765 | ||
766 | /* | |
767 | * %... & - builtin - put the job into the background | |
768 | */ | |
769 | dobg1(v) | |
770 | char **v; | |
771 | { | |
772 | register struct process *pp; | |
773 | ||
774 | pp = pfind(v[0]); | |
775 | pstart(pp, 0); | |
776 | } | |
777 | ||
778 | /* | |
779 | * dostop - builtin - stop the job | |
780 | */ | |
781 | dostop(v) | |
782 | char **v; | |
783 | { | |
784 | ||
785 | pkill(++v, SIGSTOP); | |
786 | } | |
787 | ||
788 | /* | |
789 | * dokill - builtin - superset of kill (1) | |
790 | */ | |
791 | dokill(v) | |
792 | char **v; | |
793 | { | |
794 | register int signum; | |
795 | register char *name; | |
796 | ||
797 | v++; | |
798 | if (v[0] && v[0][0] == '-') { | |
799 | if (v[0][1] == 'l') { | |
800 | for (signum = 1; signum <= NSIG; signum++) { | |
801 | if (name = mesg[signum].iname) | |
802 | printf("%s ", name); | |
803 | if (signum == 16) | |
804 | printf("\n"); | |
805 | } | |
806 | printf("\n"); | |
807 | return; | |
808 | } | |
809 | if (digit(v[0][1])) { | |
810 | signum = atoi(v[0]+1); | |
811 | if (signum < 1 || signum > NSIG) | |
812 | bferr("Bad signal number"); | |
813 | } else { | |
814 | name = &v[0][1]; | |
815 | for (signum = 1; signum <= NSIG; signum++) | |
816 | if (mesg[signum].iname && | |
817 | eq(name, mesg[signum].iname)) | |
818 | goto gotsig; | |
819 | setname(name); | |
820 | bferr("Unknown signal; kill -l lists signals"); | |
821 | } | |
822 | gotsig: | |
823 | v++; | |
824 | } else | |
825 | signum = SIGTERM; | |
826 | pkill(v, signum); | |
827 | } | |
828 | ||
829 | pkill(v, signum) | |
830 | char **v; | |
831 | int signum; | |
832 | { | |
833 | register struct process *pp, *np; | |
834 | register int jobflags = 0; | |
835 | int pid; | |
836 | extern char *sys_errlist[]; | |
837 | int err = 0; | |
838 | ||
839 | if (setintr) | |
840 | sighold(SIGINT); | |
841 | sighold(SIGCHLD); | |
842 | while (*v) { | |
843 | if (**v == '%') { | |
844 | np = pp = pfind(*v); | |
845 | do | |
846 | jobflags |= np->p_flags; | |
847 | while ((np = np->p_friends) != pp); | |
848 | switch (signum) { | |
849 | ||
850 | case SIGSTOP: | |
851 | case SIGTSTP: | |
852 | case SIGTTIN: | |
853 | case SIGTTOU: | |
854 | if ((jobflags & PRUNNING) == 0) { | |
855 | printf("%s: Already stopped\n", *v); | |
856 | err++; | |
857 | goto cont; | |
858 | } | |
859 | } | |
860 | killpg(pp->p_jobid, signum); | |
861 | if (signum == SIGTERM || signum == SIGHUP) | |
862 | killpg(pp->p_jobid, SIGCONT); | |
863 | } else if (!digit(**v)) | |
864 | bferr("Arguments should be jobs or process id's"); | |
865 | else { | |
866 | pid = atoi(*v); | |
867 | if (kill(pid, signum) < 0) { | |
868 | printf("%d: ", pid); | |
869 | printf("%s\n", sys_errlist[errno]); | |
870 | err++; | |
871 | goto cont; | |
872 | } | |
873 | if (signum == SIGTERM || signum == SIGHUP) | |
874 | kill(pid, SIGCONT); | |
875 | } | |
876 | cont: | |
877 | v++; | |
878 | } | |
879 | sigrelse(SIGCHLD); | |
880 | if (setintr) | |
881 | sigrelse(SIGINT); | |
882 | if (err) | |
883 | error(NOSTR); | |
884 | } | |
885 | ||
886 | /* | |
887 | * pstart - start the job in foreground/background | |
888 | */ | |
889 | pstart(pp, foregnd) | |
890 | register struct process *pp; | |
891 | int foregnd; | |
892 | { | |
893 | register struct process *np; | |
894 | int jobflags = 0; | |
895 | ||
896 | sighold(SIGCHLD); | |
897 | np = pp; | |
898 | do { | |
899 | jobflags |= np->p_flags; | |
900 | if (np->p_flags&(PRUNNING|PSTOPPED)) { | |
901 | np->p_flags |= PRUNNING; | |
902 | np->p_flags &= ~PSTOPPED; | |
903 | if (foregnd) | |
904 | np->p_flags |= PFOREGND; | |
905 | else | |
906 | np->p_flags &= ~PFOREGND; | |
907 | } | |
908 | } while((np = np->p_friends) != pp); | |
a132d4ed BJ |
909 | if (!foregnd) |
910 | pclrcurr(pp); | |
2d4bbda8 BJ |
911 | pprint(pp, foregnd ? NAME|JOBDIR : NUMBER|NAME|AMPERSAND); |
912 | if (foregnd) | |
913 | ioctl(FSHTTY, TIOCSPGRP, &pp->p_jobid); | |
914 | if (jobflags&PSTOPPED) | |
915 | killpg(pp->p_jobid, SIGCONT); | |
916 | sigrelse(SIGCHLD); | |
917 | } | |
918 | ||
919 | panystop(neednl) | |
920 | { | |
921 | register struct process *pp; | |
922 | ||
923 | chkstop = 2; | |
924 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
925 | if (pp->p_flags & PSTOPPED) | |
926 | error("\nThere are stopped jobs" + 1 - neednl); | |
927 | } | |
928 | ||
929 | struct process * | |
930 | pfind(cp) | |
931 | char *cp; | |
932 | { | |
933 | register struct process *pp, *np; | |
934 | ||
935 | if (cp == 0 || cp[1] == 0 || eq(cp, "%%") || eq(cp, "%+")) { | |
936 | if (pcurrent == PNULL) | |
937 | bferr("No current job"); | |
938 | return (pcurrent); | |
939 | } | |
940 | if (eq(cp, "%-") || eq(cp, "%#")) { | |
941 | if (pprevious == PNULL) | |
942 | bferr("No previous job"); | |
943 | return (pprevious); | |
944 | } | |
945 | if (digit(cp[1])) { | |
946 | int index = atoi(cp+1); | |
947 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
948 | if (pp->p_index == index && pp->p_pid == pp->p_jobid) | |
949 | return (pp); | |
950 | bferr("No such job"); | |
951 | } | |
952 | np = PNULL; | |
953 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
954 | if (pp->p_pid == pp->p_jobid) { | |
955 | if (cp[1] == '?') { | |
956 | register char *dp; | |
957 | for (dp = pp->p_command; *dp; dp++) { | |
958 | if (*dp != cp[2]) | |
959 | continue; | |
960 | if (prefix(cp+2, dp)) | |
961 | goto match; | |
962 | } | |
963 | } else if (prefix(cp+1, pp->p_command)) { | |
964 | match: | |
965 | if (np) | |
966 | bferr("Ambiguous"); | |
967 | np = pp; | |
968 | } | |
969 | } | |
970 | if (np) | |
971 | return (np); | |
972 | if (cp[1] == '?') | |
973 | bferr("No job matches pattern"); | |
974 | else | |
975 | bferr("No such job"); | |
976 | } | |
977 | ||
978 | /* | |
a132d4ed | 979 | * pgetcurr - find most recent job that is not pp, preferably stopped |
2d4bbda8 BJ |
980 | */ |
981 | struct process * | |
982 | pgetcurr(pp) | |
983 | register struct process *pp; | |
984 | { | |
985 | register struct process *np; | |
a132d4ed | 986 | register struct process *xp = PNULL; |
2d4bbda8 BJ |
987 | |
988 | for (np = proclist.p_next; np; np = np->p_next) | |
989 | if (np != pcurrent && np != pp && np->p_pid && | |
990 | np->p_pid == np->p_jobid) { | |
a132d4ed BJ |
991 | if (np->p_flags & PSTOPPED) |
992 | return (np); | |
993 | if (xp == PNULL) | |
994 | xp = np; | |
2d4bbda8 | 995 | } |
a132d4ed | 996 | return (xp); |
2d4bbda8 BJ |
997 | } |
998 | ||
999 | /* | |
1000 | * donotify - flag the job so as to report termination asynchronously | |
1001 | */ | |
1002 | donotify(v) | |
1003 | char **v; | |
1004 | { | |
1005 | register struct process *pp; | |
1006 | ||
1007 | pp = pfind(*++v); | |
1008 | pp->p_flags |= PNOTIFY; | |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * Do the fork and whatever should be done in the child side that | |
1013 | * should not be done if we are not forking at all (like for simple builtin's) | |
1014 | * Also do everything that needs any signals fiddled with in the parent side | |
1015 | * | |
1016 | * Wanttty tells whether process and/or tty pgrps are to be manipulated: | |
1017 | * -1: leave tty alone; inherit pgrp from parent | |
1018 | * 0: already have tty; manipulate process pgrps only | |
1019 | * 1: want to claim tty; manipulate process and tty pgrps | |
1020 | * It is usually just the value of tpgrp. | |
1021 | */ | |
1022 | pfork(t, wanttty) | |
1023 | struct command *t; /* command we are forking for */ | |
1024 | int wanttty; | |
1025 | { | |
1026 | register int pid; | |
1027 | bool ignint = 0; | |
1028 | int pgrp; | |
1029 | ||
1030 | /* | |
1031 | * A child will be uninterruptible only under very special | |
1032 | * conditions. Remember that the semantics of '&' is | |
1033 | * implemented by disconnecting the process from the tty so | |
1034 | * signals do not need to ignored just for '&'. | |
1035 | * Thus signals are set to default action for children unless: | |
1036 | * we have had an "onintr -" (then specifically ignored) | |
1037 | * we are not playing with signals (inherit action) | |
1038 | */ | |
1039 | if (setintr) | |
1040 | ignint = (tpgrp == -1 && (t->t_dflg&FINT)) | |
1041 | || (gointr && eq(gointr, "-")); | |
1042 | /* | |
1043 | * Hold SIGCHLD until we have the process installed in our table. | |
1044 | */ | |
1045 | sighold(SIGCHLD); | |
1046 | while ((pid = fork()) < 0) | |
1047 | if (setintr == 0) | |
1048 | sleep(FORKSLEEP); | |
1049 | else { | |
1050 | sigrelse(SIGINT); | |
1051 | sigrelse(SIGCHLD); | |
1052 | error("No more processes"); | |
1053 | } | |
1054 | if (pid == 0) { | |
1055 | settimes(); | |
1056 | pgrp = pcurrjob ? pcurrjob->p_jobid : getpid(); | |
1057 | pflushall(); | |
1058 | pcurrjob = PNULL; | |
1059 | timesdone = 0; | |
1060 | child++; | |
1061 | if (setintr) { | |
1062 | setintr = 0; /* until I think otherwise */ | |
1063 | sigrelse(SIGCHLD); | |
1064 | /* | |
1065 | * Children just get blown away on SIGINT, SIGQUIT | |
1066 | * unless "onintr -" seen. | |
1067 | */ | |
1068 | signal(SIGINT, ignint ? SIG_IGN : SIG_DFL); | |
1069 | signal(SIGQUIT, ignint ? SIG_IGN : SIG_DFL); | |
1070 | if (wanttty >= 0) { | |
1071 | /* make stoppable */ | |
1072 | signal(SIGTSTP, SIG_DFL); | |
1073 | signal(SIGTTIN, SIG_DFL); | |
1074 | signal(SIGTTOU, SIG_DFL); | |
1075 | } | |
1076 | signal(SIGTERM, parterm); | |
1077 | } else if (tpgrp == -1 && (t->t_dflg&FINT)) { | |
1078 | signal(SIGINT, SIG_IGN); | |
1079 | signal(SIGQUIT, SIG_IGN); | |
1080 | } | |
1081 | if (wanttty > 0) | |
1082 | ioctl(FSHTTY, TIOCSPGRP, &pgrp); | |
1083 | if (wanttty >= 0 && tpgrp >= 0) | |
1084 | setpgrp(0, pgrp); | |
1085 | if (tpgrp > 0) | |
1086 | tpgrp = 0; /* gave tty away */ | |
1087 | /* | |
1088 | * Nohup and nice apply only to TCOM's but it would be | |
1089 | * nice (?!?) if you could say "nohup (foo;bar)" | |
1090 | * Then the parser would have to know about nice/nohup/time | |
1091 | */ | |
1092 | if (t->t_dflg & FNOHUP) | |
1093 | signal(SIGHUP, SIG_IGN); | |
1094 | if (t->t_dflg & FNICE) { | |
1095 | /* sigh... | |
1096 | nice(20); | |
1097 | nice(-10); | |
1098 | */ | |
1099 | nice(t->t_nice); | |
1100 | } | |
1101 | ||
1102 | } else { | |
1103 | palloc(pid, t); | |
1104 | sigrelse(SIGCHLD); | |
1105 | } | |
1106 | ||
1107 | return (pid); | |
1108 | } | |
1109 | ||
1110 | okpcntl() | |
1111 | { | |
1112 | ||
1113 | if (tpgrp == -1) | |
1114 | error("No job control in this shell"); | |
1115 | if (tpgrp == 0) | |
1116 | error("No job control in subshells"); | |
1117 | } |