Commit | Line | Data |
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401149be | 1 | static char *sccsid = "@(#)proc.c 4.3 %G%"; |
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 */ |
2d4bbda8 BJ |
131 | } else if ((jobflags & (PTIME|PSTOPPED)) == PTIME) |
132 | ptprint(fp); | |
133 | } else { | |
134 | if (jobflags&PNOTIFY || adrof("notify")) { | |
135 | printf("\215\n"); | |
136 | pprint(pp, NUMBER|NAME|REASON); | |
137 | if ((jobflags&PSTOPPED) == 0) | |
138 | pflush(pp); | |
139 | } else { | |
2d4bbda8 BJ |
140 | fp->p_flags |= PNEEDNOTE; |
141 | neednote++; | |
142 | } | |
143 | } | |
144 | } | |
145 | goto loop; | |
146 | } | |
147 | ||
148 | pnote() | |
149 | { | |
150 | register struct process *pp; | |
151 | int flags; | |
152 | ||
153 | neednote = 0; | |
154 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) { | |
155 | if (pp->p_flags & PNEEDNOTE) { | |
156 | sighold(SIGCHLD); | |
157 | pp->p_flags &= ~PNEEDNOTE; | |
158 | flags = pprint(pp, NUMBER|NAME|REASON); | |
159 | if ((flags&(PRUNNING|PSTOPPED)) == 0) | |
160 | pflush(pp); | |
161 | sigrelse(SIGCHLD); | |
162 | } | |
163 | } | |
164 | } | |
165 | ||
166 | /* | |
167 | * pwait - wait for current job to terminate, maintaining integrity | |
168 | * of current and previous job indicators. | |
169 | */ | |
170 | pwait() | |
171 | { | |
172 | register struct process *fp, *pp; | |
173 | ||
174 | /* | |
175 | * Here's where dead procs get flushed. | |
176 | */ | |
177 | sighold(SIGCHLD); | |
178 | for (pp = (fp = &proclist)->p_next; pp != PNULL; pp = (fp = pp)->p_next) | |
179 | if (pp->p_pid == 0) { | |
180 | fp->p_next = pp->p_next; | |
181 | xfree(pp->p_command); | |
182 | if (pp->p_cwd && --pp->p_cwd->di_count == 0) | |
183 | if (pp->p_cwd->di_next == 0) | |
184 | dfree(pp->p_cwd); | |
185 | xfree((char *)pp); | |
186 | pp = fp; | |
187 | } | |
188 | sigrelse(SIGCHLD); | |
189 | if (setintr) | |
190 | sigignore(SIGINT); | |
191 | pjwait(pcurrjob); | |
192 | } | |
193 | ||
194 | /* | |
195 | * pjwait - wait for a job to finish or become stopped | |
196 | * It is assumed to be in the foreground state (PFOREGND) | |
197 | */ | |
198 | pjwait(pp) | |
199 | register struct process *pp; | |
200 | { | |
201 | register struct process *fp; | |
202 | int jobflags, reason; | |
203 | ||
204 | fp = pp; | |
205 | do { | |
206 | if ((fp->p_flags&(PFOREGND|PRUNNING)) == PRUNNING) | |
207 | printf("BUG: waiting for background job!\n"); | |
208 | } while ((fp = fp->p_friends) != pp); | |
209 | /* | |
210 | * Now keep pausing as long as we are not interrupted (SIGINT), | |
211 | * and the target process, or any of its friends, are running | |
212 | */ | |
213 | fp = pp; | |
214 | for (;;) { | |
215 | sighold(SIGCHLD); | |
216 | jobflags = 0; | |
217 | do | |
218 | jobflags |= fp->p_flags; | |
219 | while((fp = (fp->p_friends)) != pp); | |
220 | if ((jobflags & PRUNNING) == 0) | |
221 | break; | |
222 | sigpause(SIGCHLD); | |
223 | } | |
224 | sigrelse(SIGCHLD); | |
225 | if (tpgrp > 0) | |
226 | ioctl(FSHTTY, TIOCSPGRP, &tpgrp); /* get tty back */ | |
401149be | 227 | if ((jobflags&(PINTERRUPTED|PSTOPPED)) && setintr && |
2d4bbda8 | 228 | (!gointr || !eq(gointr, "-"))) { |
401149be BJ |
229 | if ((jobflags & PSTOPPED) == 0) |
230 | pflush(pp); | |
231 | else { | |
232 | printf("\n"); | |
233 | pprint(pp, AREASON|SHELLDIR); | |
234 | } | |
235 | pintr1(0); | |
2d4bbda8 BJ |
236 | /*NOTREACHED*/ |
237 | } | |
238 | reason = 0; | |
239 | fp = pp; | |
240 | do { | |
241 | if (fp->p_reason) | |
242 | reason = fp->p_flags & (PSIGNALED|PINTERRUPTED) ? | |
243 | fp->p_reason | QUOTE : fp->p_reason; | |
244 | } while ((fp = fp->p_friends) != pp); | |
245 | set("status", putn(reason)); | |
246 | if (reason && exiterr) | |
247 | exitstat(); | |
248 | pflush(pp); | |
249 | } | |
250 | ||
251 | /* | |
252 | * dowait - wait for all processes to finish | |
253 | */ | |
254 | dowait() | |
255 | { | |
256 | register struct process *pp; | |
257 | ||
258 | pjobs++; | |
259 | if (setintr) | |
260 | sigrelse(SIGINT); | |
261 | loop: | |
262 | sighold(SIGCHLD); | |
263 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
264 | if (pp->p_pid && pp->p_pid == pp->p_jobid && | |
265 | pp->p_flags&PRUNNING) { | |
266 | sigpause(SIGCHLD); | |
267 | goto loop; | |
268 | } | |
269 | sigrelse(SIGCHLD); | |
270 | pjobs = 0; | |
271 | } | |
272 | ||
273 | /* | |
274 | * pflushall - flush all jobs from list (e.g. at fork()) | |
275 | */ | |
276 | pflushall() | |
277 | { | |
278 | register struct process *pp; | |
279 | ||
280 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) | |
281 | if (pp->p_pid) | |
282 | pflush(pp); | |
283 | } | |
284 | ||
285 | /* | |
286 | * pflush - flag all process structures in the same job as the | |
287 | * the argument process for deletion. The actual free of the | |
288 | * space is not done here since pflush is called at interrupt level. | |
289 | */ | |
290 | pflush(pp) | |
291 | register struct process *pp; | |
292 | { | |
293 | register struct process *np; | |
294 | register int index; | |
295 | ||
296 | if (pp->p_pid == 0) { | |
297 | printf("BUG: process flushed twice"); | |
298 | return; | |
299 | } | |
300 | while (pp->p_pid != pp->p_jobid) | |
301 | pp = pp->p_friends; | |
302 | pclrcurr(pp); | |
303 | if (pp == pcurrjob) | |
304 | pcurrjob = 0; | |
305 | index = pp->p_index; | |
306 | np = pp; | |
307 | do { | |
308 | np->p_index = np->p_pid = 0; | |
309 | np->p_flags &= ~PNEEDNOTE; | |
310 | } while ((np = np->p_friends) != pp); | |
311 | if (index == pmaxindex) { | |
312 | for (np = proclist.p_next, index = 0; np; np = np->p_next) | |
313 | if (np->p_index > index) | |
314 | index = np->p_index; | |
315 | pmaxindex = index; | |
316 | } | |
317 | } | |
318 | ||
319 | /* | |
320 | * pclrcurr - make sure the given job is not the current or previous job; | |
321 | * pp MUST be the job leader | |
322 | */ | |
323 | pclrcurr(pp) | |
324 | register struct process *pp; | |
325 | { | |
326 | ||
327 | if (pp == pcurrent) | |
328 | if (pprevious != PNULL) { | |
329 | pcurrent = pprevious; | |
330 | pprevious = pgetcurr(pp); | |
331 | } else { | |
332 | pcurrent = pgetcurr(pp); | |
333 | pprevious = pgetcurr(pp); | |
334 | } | |
335 | else if (pp == pprevious) | |
336 | pprevious = pgetcurr(pp); | |
337 | } | |
338 | ||
339 | /* +4 here is 1 for '\0', 1 ea for << >& >> */ | |
340 | char command[PMAXLEN+4]; | |
341 | int cmdlen; | |
342 | char *cmdp; | |
343 | /* | |
344 | * palloc - allocate a process structure and fill it up. | |
345 | * an important assumption is made that the process is running. | |
346 | */ | |
347 | palloc(pid, t) | |
348 | int pid; | |
349 | register struct command *t; | |
350 | { | |
351 | register struct process *pp; | |
352 | int i; | |
353 | ||
354 | pp = (struct process *)calloc(1, sizeof(struct process)); | |
355 | pp->p_pid = pid; | |
356 | pp->p_flags = t->t_dflg & FAND ? PRUNNING : PRUNNING|PFOREGND; | |
357 | if (t->t_dflg & FTIME) | |
358 | pp->p_flags |= PPTIME; | |
359 | cmdp = command; | |
360 | cmdlen = 0; | |
361 | padd(t); | |
362 | *cmdp++ = 0; | |
363 | if (t->t_dflg & FPOU) { | |
364 | pp->p_flags |= PPOU; | |
365 | if (t->t_dflg & FDIAG) | |
366 | pp->p_flags |= PDIAG; | |
367 | } | |
368 | pp->p_command = savestr(command); | |
369 | if (pcurrjob) { | |
370 | struct process *fp; | |
371 | /* careful here with interrupt level */ | |
372 | pp->p_cwd = 0; | |
373 | pp->p_index = pcurrjob->p_index; | |
374 | pp->p_friends = pcurrjob; | |
375 | pp->p_jobid = pcurrjob->p_pid; | |
376 | for (fp = pcurrjob; fp->p_friends != pcurrjob; fp = fp->p_friends) | |
377 | ; | |
378 | fp->p_friends = pp; | |
379 | } else { | |
380 | pcurrjob = pp; | |
381 | pp->p_jobid = pid; | |
382 | pp->p_friends = pp; | |
383 | pp->p_cwd = dcwd; | |
384 | dcwd->di_count++; | |
385 | if (pmaxindex < BIGINDEX) | |
386 | pp->p_index = ++pmaxindex; | |
387 | else { | |
388 | struct process *np; | |
389 | ||
390 | for (i = 1; ; i++) { | |
391 | for (np = proclist.p_next; np; np = np->p_next) | |
392 | if (np->p_index == i) | |
393 | goto tryagain; | |
a132d4ed BJ |
394 | pp->p_index = i; |
395 | if (i > pmaxindex) | |
396 | pmaxindex = i; | |
2d4bbda8 BJ |
397 | break; |
398 | tryagain:; | |
399 | } | |
400 | } | |
401 | if (pcurrent == PNULL) | |
402 | pcurrent = pp; | |
403 | else if (pprevious == PNULL) | |
404 | pprevious = pp; | |
405 | } | |
406 | pp->p_next = proclist.p_next; | |
407 | proclist.p_next = pp; | |
408 | time(&pp->p_btime); | |
409 | } | |
410 | ||
411 | padd(t) | |
412 | register struct command *t; | |
413 | { | |
414 | char **argp; | |
415 | ||
416 | if (t == 0) | |
417 | return; | |
418 | switch (t->t_dtyp) { | |
419 | ||
420 | case TPAR: | |
421 | pads("( "); | |
422 | padd(t->t_dspr); | |
423 | pads(" )"); | |
424 | break; | |
425 | ||
426 | case TCOM: | |
427 | for (argp = t->t_dcom; *argp; argp++) { | |
428 | pads(*argp); | |
429 | if (argp[1]) | |
430 | pads(" "); | |
431 | } | |
432 | break; | |
433 | ||
434 | case TFIL: | |
435 | padd(t->t_dcar); | |
436 | pads(" | "); | |
437 | padd(t->t_dcdr); | |
438 | return; | |
439 | ||
440 | case TLST: | |
441 | padd(t->t_dcar); | |
442 | pads("; "); | |
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) { | |
467 | strcpy(cmdp, " ..."); | |
468 | cmdlen = PMAXLEN; | |
469 | cmdp += 4; | |
470 | return; | |
471 | } | |
472 | strcpy(cmdp, cp); | |
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"); | |
630 | #ifndef VMUNIX | |
631 | ptimes(pp->p_utime, pp->p_stime, pp->p_etime-pp->p_btime); | |
632 | #else | |
633 | pvtimes(&zvms, &pp->p_vtimes, pp->p_etime - pp->p_btime); | |
634 | #endif | |
635 | } | |
636 | if (tp == pp->p_friends) { | |
637 | if (linp != linbuf) | |
638 | printf("\n"); | |
639 | if (flag&SHELLDIR && !eq(tp->p_cwd->di_name, dcwd->di_name)) { | |
640 | printf("(wd now: "); | |
641 | dtildepr(value("home"), dcwd->di_name); | |
642 | printf(")\n"); | |
643 | } | |
644 | } | |
645 | } while ((pp = pp->p_friends) != tp); | |
646 | if (jobflags&PTIME && (jobflags&(PSTOPPED|PRUNNING)) == 0) { | |
647 | if (jobflags & NUMBER) | |
648 | printf(" "); | |
649 | ptprint(tp); | |
650 | } | |
651 | return (jobflags); | |
652 | } | |
653 | ||
654 | ptprint(tp) | |
655 | register struct process *tp; | |
656 | { | |
657 | time_t tetime = 0; | |
658 | #ifdef VMUNIX | |
659 | struct vtimes vmt; | |
660 | #else | |
661 | time_t tutime = 0, tstime = 0; | |
662 | #endif | |
663 | register struct process *pp = tp; | |
664 | ||
665 | vmt = zvms; | |
666 | do { | |
667 | #ifdef VMUNIX | |
668 | vmsadd(&vmt, &pp->p_vtimes); | |
669 | #else | |
670 | tutime += pp->p_utime; | |
671 | tstime += pp->p_stime; | |
672 | #endif | |
673 | if (pp->p_etime - pp->p_btime > tetime) | |
674 | tetime = pp->p_etime - pp->p_btime; | |
675 | } while ((pp = pp->p_friends) != tp); | |
676 | #ifdef VMUNIX | |
677 | pvtimes(&zvms, &vmt, tetime); | |
678 | #else | |
679 | ptimes(tutime, tstime, tetime); | |
680 | #endif | |
681 | } | |
682 | ||
683 | /* | |
684 | * dojobs - print all jobs | |
685 | */ | |
686 | dojobs(v) | |
687 | char **v; | |
688 | { | |
689 | register struct process *pp; | |
690 | register int flag = NUMBER|NAME|REASON; | |
691 | int i; | |
692 | ||
693 | if (chkstop) | |
694 | chkstop = 2; | |
695 | if (*++v) { | |
696 | if (v[1] || !eq(*v, "-l")) | |
697 | error("Usage: jobs [ -l ]"); | |
698 | flag |= FANCY|JOBDIR; | |
699 | } | |
700 | for (i = 1; i <= pmaxindex; i++) | |
701 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
702 | if (pp->p_index == i && pp->p_pid == pp->p_jobid) { | |
703 | pp->p_flags &= ~PNEEDNOTE; | |
704 | if (!(pprint(pp, flag) & (PRUNNING|PSTOPPED))) | |
705 | pflush(pp); | |
706 | break; | |
707 | } | |
708 | } | |
709 | ||
710 | /* | |
711 | * dofg - builtin - put the job into the foreground | |
712 | */ | |
713 | dofg(v) | |
714 | char **v; | |
715 | { | |
716 | register struct process *pp; | |
717 | ||
718 | okpcntl(); | |
719 | ++v; | |
720 | do { | |
721 | pp = pfind(*v); | |
722 | pstart(pp, 1); | |
723 | if (setintr) | |
724 | sigignore(SIGINT); | |
725 | pjwait(pp); | |
726 | } while (*v && *++v); | |
727 | } | |
728 | ||
729 | /* | |
730 | * %... - builtin - put the job into the foreground | |
731 | */ | |
732 | dofg1(v) | |
733 | char **v; | |
734 | { | |
735 | register struct process *pp; | |
736 | ||
737 | okpcntl(); | |
738 | pp = pfind(v[0]); | |
739 | pstart(pp, 1); | |
740 | if (setintr) | |
741 | sigignore(SIGINT); | |
742 | pjwait(pp); | |
743 | } | |
744 | ||
745 | /* | |
746 | * dobg - builtin - put the job into the background | |
747 | */ | |
748 | dobg(v) | |
749 | char **v; | |
750 | { | |
751 | register struct process *pp; | |
752 | ||
753 | okpcntl(); | |
754 | ++v; | |
755 | do { | |
756 | pp = pfind(*v); | |
757 | pstart(pp, 0); | |
758 | } while (*v && *++v); | |
759 | } | |
760 | ||
761 | /* | |
762 | * %... & - builtin - put the job into the background | |
763 | */ | |
764 | dobg1(v) | |
765 | char **v; | |
766 | { | |
767 | register struct process *pp; | |
768 | ||
769 | pp = pfind(v[0]); | |
770 | pstart(pp, 0); | |
771 | } | |
772 | ||
773 | /* | |
774 | * dostop - builtin - stop the job | |
775 | */ | |
776 | dostop(v) | |
777 | char **v; | |
778 | { | |
779 | ||
780 | pkill(++v, SIGSTOP); | |
781 | } | |
782 | ||
783 | /* | |
784 | * dokill - builtin - superset of kill (1) | |
785 | */ | |
786 | dokill(v) | |
787 | char **v; | |
788 | { | |
789 | register int signum; | |
790 | register char *name; | |
791 | ||
792 | v++; | |
793 | if (v[0] && v[0][0] == '-') { | |
794 | if (v[0][1] == 'l') { | |
795 | for (signum = 1; signum <= NSIG; signum++) { | |
796 | if (name = mesg[signum].iname) | |
797 | printf("%s ", name); | |
798 | if (signum == 16) | |
799 | printf("\n"); | |
800 | } | |
801 | printf("\n"); | |
802 | return; | |
803 | } | |
804 | if (digit(v[0][1])) { | |
805 | signum = atoi(v[0]+1); | |
806 | if (signum < 1 || signum > NSIG) | |
807 | bferr("Bad signal number"); | |
808 | } else { | |
809 | name = &v[0][1]; | |
810 | for (signum = 1; signum <= NSIG; signum++) | |
811 | if (mesg[signum].iname && | |
812 | eq(name, mesg[signum].iname)) | |
813 | goto gotsig; | |
814 | setname(name); | |
815 | bferr("Unknown signal; kill -l lists signals"); | |
816 | } | |
817 | gotsig: | |
818 | v++; | |
819 | } else | |
820 | signum = SIGTERM; | |
821 | pkill(v, signum); | |
822 | } | |
823 | ||
824 | pkill(v, signum) | |
825 | char **v; | |
826 | int signum; | |
827 | { | |
828 | register struct process *pp, *np; | |
829 | register int jobflags = 0; | |
830 | int pid; | |
831 | extern char *sys_errlist[]; | |
832 | int err = 0; | |
833 | ||
834 | if (setintr) | |
835 | sighold(SIGINT); | |
836 | sighold(SIGCHLD); | |
837 | while (*v) { | |
838 | if (**v == '%') { | |
839 | np = pp = pfind(*v); | |
840 | do | |
841 | jobflags |= np->p_flags; | |
842 | while ((np = np->p_friends) != pp); | |
843 | switch (signum) { | |
844 | ||
845 | case SIGSTOP: | |
846 | case SIGTSTP: | |
847 | case SIGTTIN: | |
848 | case SIGTTOU: | |
849 | if ((jobflags & PRUNNING) == 0) { | |
850 | printf("%s: Already stopped\n", *v); | |
851 | err++; | |
852 | goto cont; | |
853 | } | |
854 | } | |
855 | killpg(pp->p_jobid, signum); | |
856 | if (signum == SIGTERM || signum == SIGHUP) | |
857 | killpg(pp->p_jobid, SIGCONT); | |
858 | } else if (!digit(**v)) | |
859 | bferr("Arguments should be jobs or process id's"); | |
860 | else { | |
861 | pid = atoi(*v); | |
862 | if (kill(pid, signum) < 0) { | |
863 | printf("%d: ", pid); | |
864 | printf("%s\n", sys_errlist[errno]); | |
865 | err++; | |
866 | goto cont; | |
867 | } | |
868 | if (signum == SIGTERM || signum == SIGHUP) | |
869 | kill(pid, SIGCONT); | |
870 | } | |
871 | cont: | |
872 | v++; | |
873 | } | |
874 | sigrelse(SIGCHLD); | |
875 | if (setintr) | |
876 | sigrelse(SIGINT); | |
877 | if (err) | |
878 | error(NOSTR); | |
879 | } | |
880 | ||
881 | /* | |
882 | * pstart - start the job in foreground/background | |
883 | */ | |
884 | pstart(pp, foregnd) | |
885 | register struct process *pp; | |
886 | int foregnd; | |
887 | { | |
888 | register struct process *np; | |
889 | int jobflags = 0; | |
890 | ||
891 | sighold(SIGCHLD); | |
892 | np = pp; | |
893 | do { | |
894 | jobflags |= np->p_flags; | |
895 | if (np->p_flags&(PRUNNING|PSTOPPED)) { | |
896 | np->p_flags |= PRUNNING; | |
897 | np->p_flags &= ~PSTOPPED; | |
898 | if (foregnd) | |
899 | np->p_flags |= PFOREGND; | |
900 | else | |
901 | np->p_flags &= ~PFOREGND; | |
902 | } | |
903 | } while((np = np->p_friends) != pp); | |
a132d4ed BJ |
904 | if (!foregnd) |
905 | pclrcurr(pp); | |
2d4bbda8 BJ |
906 | pprint(pp, foregnd ? NAME|JOBDIR : NUMBER|NAME|AMPERSAND); |
907 | if (foregnd) | |
908 | ioctl(FSHTTY, TIOCSPGRP, &pp->p_jobid); | |
909 | if (jobflags&PSTOPPED) | |
910 | killpg(pp->p_jobid, SIGCONT); | |
911 | sigrelse(SIGCHLD); | |
912 | } | |
913 | ||
914 | panystop(neednl) | |
915 | { | |
916 | register struct process *pp; | |
917 | ||
918 | chkstop = 2; | |
919 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
920 | if (pp->p_flags & PSTOPPED) | |
921 | error("\nThere are stopped jobs" + 1 - neednl); | |
922 | } | |
923 | ||
924 | struct process * | |
925 | pfind(cp) | |
926 | char *cp; | |
927 | { | |
928 | register struct process *pp, *np; | |
929 | ||
930 | if (cp == 0 || cp[1] == 0 || eq(cp, "%%") || eq(cp, "%+")) { | |
931 | if (pcurrent == PNULL) | |
932 | bferr("No current job"); | |
933 | return (pcurrent); | |
934 | } | |
935 | if (eq(cp, "%-") || eq(cp, "%#")) { | |
936 | if (pprevious == PNULL) | |
937 | bferr("No previous job"); | |
938 | return (pprevious); | |
939 | } | |
940 | if (digit(cp[1])) { | |
941 | int index = atoi(cp+1); | |
942 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
943 | if (pp->p_index == index && pp->p_pid == pp->p_jobid) | |
944 | return (pp); | |
945 | bferr("No such job"); | |
946 | } | |
947 | np = PNULL; | |
948 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
949 | if (pp->p_pid == pp->p_jobid) { | |
950 | if (cp[1] == '?') { | |
951 | register char *dp; | |
952 | for (dp = pp->p_command; *dp; dp++) { | |
953 | if (*dp != cp[2]) | |
954 | continue; | |
955 | if (prefix(cp+2, dp)) | |
956 | goto match; | |
957 | } | |
958 | } else if (prefix(cp+1, pp->p_command)) { | |
959 | match: | |
960 | if (np) | |
961 | bferr("Ambiguous"); | |
962 | np = pp; | |
963 | } | |
964 | } | |
965 | if (np) | |
966 | return (np); | |
967 | if (cp[1] == '?') | |
968 | bferr("No job matches pattern"); | |
969 | else | |
970 | bferr("No such job"); | |
971 | } | |
972 | ||
973 | /* | |
a132d4ed | 974 | * pgetcurr - find most recent job that is not pp, preferably stopped |
2d4bbda8 BJ |
975 | */ |
976 | struct process * | |
977 | pgetcurr(pp) | |
978 | register struct process *pp; | |
979 | { | |
980 | register struct process *np; | |
a132d4ed | 981 | register struct process *xp = PNULL; |
2d4bbda8 BJ |
982 | |
983 | for (np = proclist.p_next; np; np = np->p_next) | |
984 | if (np != pcurrent && np != pp && np->p_pid && | |
985 | np->p_pid == np->p_jobid) { | |
a132d4ed BJ |
986 | if (np->p_flags & PSTOPPED) |
987 | return (np); | |
988 | if (xp == PNULL) | |
989 | xp = np; | |
2d4bbda8 | 990 | } |
a132d4ed | 991 | return (xp); |
2d4bbda8 BJ |
992 | } |
993 | ||
994 | /* | |
995 | * donotify - flag the job so as to report termination asynchronously | |
996 | */ | |
997 | donotify(v) | |
998 | char **v; | |
999 | { | |
1000 | register struct process *pp; | |
1001 | ||
1002 | pp = pfind(*++v); | |
1003 | pp->p_flags |= PNOTIFY; | |
1004 | } | |
1005 | ||
1006 | /* | |
1007 | * Do the fork and whatever should be done in the child side that | |
1008 | * should not be done if we are not forking at all (like for simple builtin's) | |
1009 | * Also do everything that needs any signals fiddled with in the parent side | |
1010 | * | |
1011 | * Wanttty tells whether process and/or tty pgrps are to be manipulated: | |
1012 | * -1: leave tty alone; inherit pgrp from parent | |
1013 | * 0: already have tty; manipulate process pgrps only | |
1014 | * 1: want to claim tty; manipulate process and tty pgrps | |
1015 | * It is usually just the value of tpgrp. | |
1016 | */ | |
1017 | pfork(t, wanttty) | |
1018 | struct command *t; /* command we are forking for */ | |
1019 | int wanttty; | |
1020 | { | |
1021 | register int pid; | |
1022 | bool ignint = 0; | |
1023 | int pgrp; | |
1024 | ||
1025 | /* | |
1026 | * A child will be uninterruptible only under very special | |
1027 | * conditions. Remember that the semantics of '&' is | |
1028 | * implemented by disconnecting the process from the tty so | |
1029 | * signals do not need to ignored just for '&'. | |
1030 | * Thus signals are set to default action for children unless: | |
1031 | * we have had an "onintr -" (then specifically ignored) | |
1032 | * we are not playing with signals (inherit action) | |
1033 | */ | |
1034 | if (setintr) | |
1035 | ignint = (tpgrp == -1 && (t->t_dflg&FINT)) | |
1036 | || (gointr && eq(gointr, "-")); | |
1037 | /* | |
1038 | * Hold SIGCHLD until we have the process installed in our table. | |
1039 | */ | |
1040 | sighold(SIGCHLD); | |
1041 | while ((pid = fork()) < 0) | |
1042 | if (setintr == 0) | |
1043 | sleep(FORKSLEEP); | |
1044 | else { | |
1045 | sigrelse(SIGINT); | |
1046 | sigrelse(SIGCHLD); | |
1047 | error("No more processes"); | |
1048 | } | |
1049 | if (pid == 0) { | |
1050 | settimes(); | |
1051 | pgrp = pcurrjob ? pcurrjob->p_jobid : getpid(); | |
1052 | pflushall(); | |
1053 | pcurrjob = PNULL; | |
1054 | timesdone = 0; | |
1055 | child++; | |
1056 | if (setintr) { | |
1057 | setintr = 0; /* until I think otherwise */ | |
1058 | sigrelse(SIGCHLD); | |
1059 | /* | |
1060 | * Children just get blown away on SIGINT, SIGQUIT | |
1061 | * unless "onintr -" seen. | |
1062 | */ | |
1063 | signal(SIGINT, ignint ? SIG_IGN : SIG_DFL); | |
1064 | signal(SIGQUIT, ignint ? SIG_IGN : SIG_DFL); | |
1065 | if (wanttty >= 0) { | |
1066 | /* make stoppable */ | |
1067 | signal(SIGTSTP, SIG_DFL); | |
1068 | signal(SIGTTIN, SIG_DFL); | |
1069 | signal(SIGTTOU, SIG_DFL); | |
1070 | } | |
1071 | signal(SIGTERM, parterm); | |
1072 | } else if (tpgrp == -1 && (t->t_dflg&FINT)) { | |
1073 | signal(SIGINT, SIG_IGN); | |
1074 | signal(SIGQUIT, SIG_IGN); | |
1075 | } | |
1076 | if (wanttty > 0) | |
1077 | ioctl(FSHTTY, TIOCSPGRP, &pgrp); | |
1078 | if (wanttty >= 0 && tpgrp >= 0) | |
1079 | setpgrp(0, pgrp); | |
1080 | if (tpgrp > 0) | |
1081 | tpgrp = 0; /* gave tty away */ | |
1082 | /* | |
1083 | * Nohup and nice apply only to TCOM's but it would be | |
1084 | * nice (?!?) if you could say "nohup (foo;bar)" | |
1085 | * Then the parser would have to know about nice/nohup/time | |
1086 | */ | |
1087 | if (t->t_dflg & FNOHUP) | |
1088 | signal(SIGHUP, SIG_IGN); | |
1089 | if (t->t_dflg & FNICE) { | |
1090 | /* sigh... | |
1091 | nice(20); | |
1092 | nice(-10); | |
1093 | */ | |
1094 | nice(t->t_nice); | |
1095 | } | |
1096 | ||
1097 | } else { | |
1098 | palloc(pid, t); | |
1099 | sigrelse(SIGCHLD); | |
1100 | } | |
1101 | ||
1102 | return (pid); | |
1103 | } | |
1104 | ||
1105 | okpcntl() | |
1106 | { | |
1107 | ||
1108 | if (tpgrp == -1) | |
1109 | error("No job control in this shell"); | |
1110 | if (tpgrp == 0) | |
1111 | error("No job control in subshells"); | |
1112 | } |