Commit | Line | Data |
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a132d4ed | 1 | static char *sccsid = "@(#)proc.c 4.2 %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)) { | |
130 | if (jobflags & PSTOPPED) | |
131 | printf("\n"); | |
132 | pprint(fp, AREASON|SHELLDIR); | |
133 | } else if ((jobflags & (PTIME|PSTOPPED)) == PTIME) | |
134 | ptprint(fp); | |
135 | } else { | |
136 | if (jobflags&PNOTIFY || adrof("notify")) { | |
137 | printf("\215\n"); | |
138 | pprint(pp, NUMBER|NAME|REASON); | |
139 | if ((jobflags&PSTOPPED) == 0) | |
140 | pflush(pp); | |
141 | } else { | |
2d4bbda8 BJ |
142 | fp->p_flags |= PNEEDNOTE; |
143 | neednote++; | |
144 | } | |
145 | } | |
146 | } | |
147 | goto loop; | |
148 | } | |
149 | ||
150 | pnote() | |
151 | { | |
152 | register struct process *pp; | |
153 | int flags; | |
154 | ||
155 | neednote = 0; | |
156 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) { | |
157 | if (pp->p_flags & PNEEDNOTE) { | |
158 | sighold(SIGCHLD); | |
159 | pp->p_flags &= ~PNEEDNOTE; | |
160 | flags = pprint(pp, NUMBER|NAME|REASON); | |
161 | if ((flags&(PRUNNING|PSTOPPED)) == 0) | |
162 | pflush(pp); | |
163 | sigrelse(SIGCHLD); | |
164 | } | |
165 | } | |
166 | } | |
167 | ||
168 | /* | |
169 | * pwait - wait for current job to terminate, maintaining integrity | |
170 | * of current and previous job indicators. | |
171 | */ | |
172 | pwait() | |
173 | { | |
174 | register struct process *fp, *pp; | |
175 | ||
176 | /* | |
177 | * Here's where dead procs get flushed. | |
178 | */ | |
179 | sighold(SIGCHLD); | |
180 | for (pp = (fp = &proclist)->p_next; pp != PNULL; pp = (fp = pp)->p_next) | |
181 | if (pp->p_pid == 0) { | |
182 | fp->p_next = pp->p_next; | |
183 | xfree(pp->p_command); | |
184 | if (pp->p_cwd && --pp->p_cwd->di_count == 0) | |
185 | if (pp->p_cwd->di_next == 0) | |
186 | dfree(pp->p_cwd); | |
187 | xfree((char *)pp); | |
188 | pp = fp; | |
189 | } | |
190 | sigrelse(SIGCHLD); | |
191 | if (setintr) | |
192 | sigignore(SIGINT); | |
193 | pjwait(pcurrjob); | |
194 | } | |
195 | ||
196 | /* | |
197 | * pjwait - wait for a job to finish or become stopped | |
198 | * It is assumed to be in the foreground state (PFOREGND) | |
199 | */ | |
200 | pjwait(pp) | |
201 | register struct process *pp; | |
202 | { | |
203 | register struct process *fp; | |
204 | int jobflags, reason; | |
205 | ||
206 | fp = pp; | |
207 | do { | |
208 | if ((fp->p_flags&(PFOREGND|PRUNNING)) == PRUNNING) | |
209 | printf("BUG: waiting for background job!\n"); | |
210 | } while ((fp = fp->p_friends) != pp); | |
211 | /* | |
212 | * Now keep pausing as long as we are not interrupted (SIGINT), | |
213 | * and the target process, or any of its friends, are running | |
214 | */ | |
215 | fp = pp; | |
216 | for (;;) { | |
217 | sighold(SIGCHLD); | |
218 | jobflags = 0; | |
219 | do | |
220 | jobflags |= fp->p_flags; | |
221 | while((fp = (fp->p_friends)) != pp); | |
222 | if ((jobflags & PRUNNING) == 0) | |
223 | break; | |
224 | sigpause(SIGCHLD); | |
225 | } | |
226 | sigrelse(SIGCHLD); | |
227 | if (tpgrp > 0) | |
228 | ioctl(FSHTTY, TIOCSPGRP, &tpgrp); /* get tty back */ | |
229 | if (jobflags & PSTOPPED) | |
230 | return; | |
231 | if ((jobflags&PINTERRUPTED) && setintr && | |
232 | (!gointr || !eq(gointr, "-"))) { | |
233 | pflush(pp); | |
234 | pintr(); | |
235 | /*NOTREACHED*/ | |
236 | } | |
237 | reason = 0; | |
238 | fp = pp; | |
239 | do { | |
240 | if (fp->p_reason) | |
241 | reason = fp->p_flags & (PSIGNALED|PINTERRUPTED) ? | |
242 | fp->p_reason | QUOTE : fp->p_reason; | |
243 | } while ((fp = fp->p_friends) != pp); | |
244 | set("status", putn(reason)); | |
245 | if (reason && exiterr) | |
246 | exitstat(); | |
247 | pflush(pp); | |
248 | } | |
249 | ||
250 | /* | |
251 | * dowait - wait for all processes to finish | |
252 | */ | |
253 | dowait() | |
254 | { | |
255 | register struct process *pp; | |
256 | ||
257 | pjobs++; | |
258 | if (setintr) | |
259 | sigrelse(SIGINT); | |
260 | loop: | |
261 | sighold(SIGCHLD); | |
262 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
263 | if (pp->p_pid && pp->p_pid == pp->p_jobid && | |
264 | pp->p_flags&PRUNNING) { | |
265 | sigpause(SIGCHLD); | |
266 | goto loop; | |
267 | } | |
268 | sigrelse(SIGCHLD); | |
269 | pjobs = 0; | |
270 | } | |
271 | ||
272 | /* | |
273 | * pflushall - flush all jobs from list (e.g. at fork()) | |
274 | */ | |
275 | pflushall() | |
276 | { | |
277 | register struct process *pp; | |
278 | ||
279 | for (pp = proclist.p_next; pp != PNULL; pp = pp->p_next) | |
280 | if (pp->p_pid) | |
281 | pflush(pp); | |
282 | } | |
283 | ||
284 | /* | |
285 | * pflush - flag all process structures in the same job as the | |
286 | * the argument process for deletion. The actual free of the | |
287 | * space is not done here since pflush is called at interrupt level. | |
288 | */ | |
289 | pflush(pp) | |
290 | register struct process *pp; | |
291 | { | |
292 | register struct process *np; | |
293 | register int index; | |
294 | ||
295 | if (pp->p_pid == 0) { | |
296 | printf("BUG: process flushed twice"); | |
297 | return; | |
298 | } | |
299 | while (pp->p_pid != pp->p_jobid) | |
300 | pp = pp->p_friends; | |
301 | pclrcurr(pp); | |
302 | if (pp == pcurrjob) | |
303 | pcurrjob = 0; | |
304 | index = pp->p_index; | |
305 | np = pp; | |
306 | do { | |
307 | np->p_index = np->p_pid = 0; | |
308 | np->p_flags &= ~PNEEDNOTE; | |
309 | } while ((np = np->p_friends) != pp); | |
310 | if (index == pmaxindex) { | |
311 | for (np = proclist.p_next, index = 0; np; np = np->p_next) | |
312 | if (np->p_index > index) | |
313 | index = np->p_index; | |
314 | pmaxindex = index; | |
315 | } | |
316 | } | |
317 | ||
318 | /* | |
319 | * pclrcurr - make sure the given job is not the current or previous job; | |
320 | * pp MUST be the job leader | |
321 | */ | |
322 | pclrcurr(pp) | |
323 | register struct process *pp; | |
324 | { | |
325 | ||
326 | if (pp == pcurrent) | |
327 | if (pprevious != PNULL) { | |
328 | pcurrent = pprevious; | |
329 | pprevious = pgetcurr(pp); | |
330 | } else { | |
331 | pcurrent = pgetcurr(pp); | |
332 | pprevious = pgetcurr(pp); | |
333 | } | |
334 | else if (pp == pprevious) | |
335 | pprevious = pgetcurr(pp); | |
336 | } | |
337 | ||
338 | /* +4 here is 1 for '\0', 1 ea for << >& >> */ | |
339 | char command[PMAXLEN+4]; | |
340 | int cmdlen; | |
341 | char *cmdp; | |
342 | /* | |
343 | * palloc - allocate a process structure and fill it up. | |
344 | * an important assumption is made that the process is running. | |
345 | */ | |
346 | palloc(pid, t) | |
347 | int pid; | |
348 | register struct command *t; | |
349 | { | |
350 | register struct process *pp; | |
351 | int i; | |
352 | ||
353 | pp = (struct process *)calloc(1, sizeof(struct process)); | |
354 | pp->p_pid = pid; | |
355 | pp->p_flags = t->t_dflg & FAND ? PRUNNING : PRUNNING|PFOREGND; | |
356 | if (t->t_dflg & FTIME) | |
357 | pp->p_flags |= PPTIME; | |
358 | cmdp = command; | |
359 | cmdlen = 0; | |
360 | padd(t); | |
361 | *cmdp++ = 0; | |
362 | if (t->t_dflg & FPOU) { | |
363 | pp->p_flags |= PPOU; | |
364 | if (t->t_dflg & FDIAG) | |
365 | pp->p_flags |= PDIAG; | |
366 | } | |
367 | pp->p_command = savestr(command); | |
368 | if (pcurrjob) { | |
369 | struct process *fp; | |
370 | /* careful here with interrupt level */ | |
371 | pp->p_cwd = 0; | |
372 | pp->p_index = pcurrjob->p_index; | |
373 | pp->p_friends = pcurrjob; | |
374 | pp->p_jobid = pcurrjob->p_pid; | |
375 | for (fp = pcurrjob; fp->p_friends != pcurrjob; fp = fp->p_friends) | |
376 | ; | |
377 | fp->p_friends = pp; | |
378 | } else { | |
379 | pcurrjob = pp; | |
380 | pp->p_jobid = pid; | |
381 | pp->p_friends = pp; | |
382 | pp->p_cwd = dcwd; | |
383 | dcwd->di_count++; | |
384 | if (pmaxindex < BIGINDEX) | |
385 | pp->p_index = ++pmaxindex; | |
386 | else { | |
387 | struct process *np; | |
388 | ||
389 | for (i = 1; ; i++) { | |
390 | for (np = proclist.p_next; np; np = np->p_next) | |
391 | if (np->p_index == i) | |
392 | goto tryagain; | |
a132d4ed BJ |
393 | pp->p_index = i; |
394 | if (i > pmaxindex) | |
395 | pmaxindex = i; | |
2d4bbda8 BJ |
396 | break; |
397 | tryagain:; | |
398 | } | |
399 | } | |
400 | if (pcurrent == PNULL) | |
401 | pcurrent = pp; | |
402 | else if (pprevious == PNULL) | |
403 | pprevious = pp; | |
404 | } | |
405 | pp->p_next = proclist.p_next; | |
406 | proclist.p_next = pp; | |
407 | time(&pp->p_btime); | |
408 | } | |
409 | ||
410 | padd(t) | |
411 | register struct command *t; | |
412 | { | |
413 | char **argp; | |
414 | ||
415 | if (t == 0) | |
416 | return; | |
417 | switch (t->t_dtyp) { | |
418 | ||
419 | case TPAR: | |
420 | pads("( "); | |
421 | padd(t->t_dspr); | |
422 | pads(" )"); | |
423 | break; | |
424 | ||
425 | case TCOM: | |
426 | for (argp = t->t_dcom; *argp; argp++) { | |
427 | pads(*argp); | |
428 | if (argp[1]) | |
429 | pads(" "); | |
430 | } | |
431 | break; | |
432 | ||
433 | case TFIL: | |
434 | padd(t->t_dcar); | |
435 | pads(" | "); | |
436 | padd(t->t_dcdr); | |
437 | return; | |
438 | ||
439 | case TLST: | |
440 | padd(t->t_dcar); | |
441 | pads("; "); | |
442 | padd(t->t_dcdr); | |
443 | return; | |
444 | } | |
445 | if ((t->t_dflg & FPIN) == 0 && t->t_dlef) { | |
446 | pads((t->t_dflg & FHERE) ? " << " : " < "); | |
447 | pads(t->t_dlef); | |
448 | } | |
449 | if ((t->t_dflg & FPOU) == 0 && t->t_drit) { | |
450 | pads((t->t_dflg & FCAT) ? " >>" : " >"); | |
451 | if (t->t_dflg & FDIAG) | |
452 | pads("&"); | |
453 | pads(" "); | |
454 | pads(t->t_drit); | |
455 | } | |
456 | } | |
457 | ||
458 | pads(cp) | |
459 | char *cp; | |
460 | { | |
461 | register int i = strlen(cp); | |
462 | ||
463 | if (cmdlen >= PMAXLEN) | |
464 | return; | |
465 | if (cmdlen + i >= PMAXLEN) { | |
466 | strcpy(cmdp, " ..."); | |
467 | cmdlen = PMAXLEN; | |
468 | cmdp += 4; | |
469 | return; | |
470 | } | |
471 | strcpy(cmdp, cp); | |
472 | cmdp += i; | |
473 | cmdlen += i; | |
474 | } | |
475 | ||
476 | /* | |
477 | * psavejob - temporarily save the current job on a one level stack | |
478 | * so another job can be created. Used for { } in exp6 | |
479 | * and `` in globbing. | |
480 | */ | |
481 | psavejob() | |
482 | { | |
483 | ||
484 | pholdjob = pcurrjob; | |
485 | pcurrjob = PNULL; | |
486 | } | |
487 | ||
488 | /* | |
489 | * prestjob - opposite of psavejob. This may be missed if we are interrupted | |
490 | * somewhere, but pendjob cleans up anyway. | |
491 | */ | |
492 | prestjob() | |
493 | { | |
494 | ||
495 | pcurrjob = pholdjob; | |
496 | pholdjob = PNULL; | |
497 | } | |
498 | ||
499 | /* | |
500 | * pendjob - indicate that a job (set of commands) has been completed | |
501 | * or is about to begin. | |
502 | */ | |
503 | pendjob() | |
504 | { | |
505 | register struct process *pp, *tp; | |
506 | ||
507 | if (pcurrjob && (pcurrjob->p_flags&(PFOREGND|PSTOPPED)) == 0) { | |
508 | pp = pcurrjob; | |
509 | while (pp->p_pid != pp->p_jobid) | |
510 | pp = pp->p_friends; | |
511 | printf("[%d]", pp->p_index); | |
512 | tp = pp; | |
513 | do { | |
514 | printf(" %d", pp->p_pid); | |
515 | pp = pp->p_friends; | |
516 | } while (pp != tp); | |
517 | printf("\n"); | |
518 | } | |
519 | pholdjob = pcurrjob = 0; | |
520 | } | |
521 | ||
522 | /* | |
523 | * pprint - print a job | |
524 | */ | |
525 | pprint(pp, flag) | |
526 | register struct process *pp; | |
527 | { | |
528 | register status, reason; | |
529 | struct process *tp; | |
530 | extern char *linp, linbuf[]; | |
531 | int jobflags, pstatus; | |
532 | char *format; | |
533 | ||
534 | while (pp->p_pid != pp->p_jobid) | |
535 | pp = pp->p_friends; | |
536 | if (pp == pp->p_friends && (pp->p_flags & PPTIME)) { | |
537 | pp->p_flags &= ~PPTIME; | |
538 | pp->p_flags |= PTIME; | |
539 | } | |
540 | tp = pp; | |
541 | status = reason = -1; | |
542 | jobflags = 0; | |
543 | do { | |
544 | jobflags |= pp->p_flags; | |
545 | pstatus = pp->p_flags & PALLSTATES; | |
546 | if (tp != pp && linp != linbuf && !(flag&FANCY) && | |
547 | (pstatus == status && pp->p_reason == reason || | |
548 | !(flag&REASON))) | |
549 | printf(" "); | |
550 | else { | |
551 | if (tp != pp && linp != linbuf) | |
552 | printf("\n"); | |
553 | if(flag&NUMBER) | |
554 | if (pp == tp) | |
555 | printf("[%d]%s %c ", pp->p_index, | |
556 | pp->p_index < 10 ? " " : "", | |
557 | pp==pcurrent ? '+' : | |
558 | (pp == pprevious ? '-' : ' ')); | |
559 | else | |
560 | printf(" "); | |
561 | if (flag&FANCY) | |
562 | printf("%5d ", pp->p_pid); | |
563 | if (flag&(REASON|AREASON)) { | |
564 | if (flag&NAME) | |
565 | format = "%-21s"; | |
566 | else | |
567 | format = "%s"; | |
568 | if (pstatus == status) | |
569 | if (pp->p_reason == reason) { | |
570 | printf(format, ""); | |
571 | goto prcomd; | |
572 | } else | |
573 | reason = pp->p_reason; | |
574 | else { | |
575 | status = pstatus; | |
576 | reason = pp->p_reason; | |
577 | } | |
578 | switch (status) { | |
579 | ||
580 | case PRUNNING: | |
581 | printf(format, "Running "); | |
582 | break; | |
583 | ||
584 | case PINTERRUPTED: | |
585 | case PSTOPPED: | |
586 | case PSIGNALED: | |
587 | if (flag&REASON || reason != SIGINT || | |
588 | reason != SIGPIPE) | |
589 | printf(format, mesg[pp->p_reason].pname); | |
590 | break; | |
591 | ||
592 | case PNEXITED: | |
593 | case PAEXITED: | |
594 | if (flag & REASON) | |
595 | if (pp->p_reason) | |
596 | printf("Exit %-16d", pp->p_reason); | |
597 | else | |
598 | printf(format, "Done"); | |
599 | break; | |
600 | ||
601 | default: | |
602 | printf("BUG: status=%-9o", status); | |
603 | } | |
604 | } | |
605 | } | |
606 | prcomd: | |
607 | if (flag&NAME) { | |
608 | printf("%s", pp->p_command); | |
609 | if (pp->p_flags & PPOU) | |
610 | printf(" |"); | |
611 | if (pp->p_flags & PDIAG) | |
612 | printf("&"); | |
613 | } | |
614 | if (flag&(REASON|AREASON) && pp->p_flags&PDUMPED) | |
615 | printf(" (core dumped)"); | |
616 | if (tp == pp->p_friends) { | |
617 | if (flag&ERSAND) | |
618 | printf(" &"); | |
619 | if (flag&JOBDIR && | |
620 | !eq(tp->p_cwd->di_name, dcwd->di_name)) { | |
621 | printf(" (wd: "); | |
622 | dtildepr(value("home"), tp->p_cwd->di_name); | |
623 | printf(")"); | |
624 | } | |
625 | } | |
626 | if (pp->p_flags&PPTIME && !(status&(PSTOPPED|PRUNNING))) { | |
627 | if (linp != linbuf) | |
628 | printf("\n\t"); | |
629 | #ifndef VMUNIX | |
630 | ptimes(pp->p_utime, pp->p_stime, pp->p_etime-pp->p_btime); | |
631 | #else | |
632 | pvtimes(&zvms, &pp->p_vtimes, pp->p_etime - pp->p_btime); | |
633 | #endif | |
634 | } | |
635 | if (tp == pp->p_friends) { | |
636 | if (linp != linbuf) | |
637 | printf("\n"); | |
638 | if (flag&SHELLDIR && !eq(tp->p_cwd->di_name, dcwd->di_name)) { | |
639 | printf("(wd now: "); | |
640 | dtildepr(value("home"), dcwd->di_name); | |
641 | printf(")\n"); | |
642 | } | |
643 | } | |
644 | } while ((pp = pp->p_friends) != tp); | |
645 | if (jobflags&PTIME && (jobflags&(PSTOPPED|PRUNNING)) == 0) { | |
646 | if (jobflags & NUMBER) | |
647 | printf(" "); | |
648 | ptprint(tp); | |
649 | } | |
650 | return (jobflags); | |
651 | } | |
652 | ||
653 | ptprint(tp) | |
654 | register struct process *tp; | |
655 | { | |
656 | time_t tetime = 0; | |
657 | #ifdef VMUNIX | |
658 | struct vtimes vmt; | |
659 | #else | |
660 | time_t tutime = 0, tstime = 0; | |
661 | #endif | |
662 | register struct process *pp = tp; | |
663 | ||
664 | vmt = zvms; | |
665 | do { | |
666 | #ifdef VMUNIX | |
667 | vmsadd(&vmt, &pp->p_vtimes); | |
668 | #else | |
669 | tutime += pp->p_utime; | |
670 | tstime += pp->p_stime; | |
671 | #endif | |
672 | if (pp->p_etime - pp->p_btime > tetime) | |
673 | tetime = pp->p_etime - pp->p_btime; | |
674 | } while ((pp = pp->p_friends) != tp); | |
675 | #ifdef VMUNIX | |
676 | pvtimes(&zvms, &vmt, tetime); | |
677 | #else | |
678 | ptimes(tutime, tstime, tetime); | |
679 | #endif | |
680 | } | |
681 | ||
682 | /* | |
683 | * dojobs - print all jobs | |
684 | */ | |
685 | dojobs(v) | |
686 | char **v; | |
687 | { | |
688 | register struct process *pp; | |
689 | register int flag = NUMBER|NAME|REASON; | |
690 | int i; | |
691 | ||
692 | if (chkstop) | |
693 | chkstop = 2; | |
694 | if (*++v) { | |
695 | if (v[1] || !eq(*v, "-l")) | |
696 | error("Usage: jobs [ -l ]"); | |
697 | flag |= FANCY|JOBDIR; | |
698 | } | |
699 | for (i = 1; i <= pmaxindex; i++) | |
700 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
701 | if (pp->p_index == i && pp->p_pid == pp->p_jobid) { | |
702 | pp->p_flags &= ~PNEEDNOTE; | |
703 | if (!(pprint(pp, flag) & (PRUNNING|PSTOPPED))) | |
704 | pflush(pp); | |
705 | break; | |
706 | } | |
707 | } | |
708 | ||
709 | /* | |
710 | * dofg - builtin - put the job into the foreground | |
711 | */ | |
712 | dofg(v) | |
713 | char **v; | |
714 | { | |
715 | register struct process *pp; | |
716 | ||
717 | okpcntl(); | |
718 | ++v; | |
719 | do { | |
720 | pp = pfind(*v); | |
721 | pstart(pp, 1); | |
722 | if (setintr) | |
723 | sigignore(SIGINT); | |
724 | pjwait(pp); | |
725 | } while (*v && *++v); | |
726 | } | |
727 | ||
728 | /* | |
729 | * %... - builtin - put the job into the foreground | |
730 | */ | |
731 | dofg1(v) | |
732 | char **v; | |
733 | { | |
734 | register struct process *pp; | |
735 | ||
736 | okpcntl(); | |
737 | pp = pfind(v[0]); | |
738 | pstart(pp, 1); | |
739 | if (setintr) | |
740 | sigignore(SIGINT); | |
741 | pjwait(pp); | |
742 | } | |
743 | ||
744 | /* | |
745 | * dobg - builtin - put the job into the background | |
746 | */ | |
747 | dobg(v) | |
748 | char **v; | |
749 | { | |
750 | register struct process *pp; | |
751 | ||
752 | okpcntl(); | |
753 | ++v; | |
754 | do { | |
755 | pp = pfind(*v); | |
756 | pstart(pp, 0); | |
757 | } while (*v && *++v); | |
758 | } | |
759 | ||
760 | /* | |
761 | * %... & - builtin - put the job into the background | |
762 | */ | |
763 | dobg1(v) | |
764 | char **v; | |
765 | { | |
766 | register struct process *pp; | |
767 | ||
768 | pp = pfind(v[0]); | |
769 | pstart(pp, 0); | |
770 | } | |
771 | ||
772 | /* | |
773 | * dostop - builtin - stop the job | |
774 | */ | |
775 | dostop(v) | |
776 | char **v; | |
777 | { | |
778 | ||
779 | pkill(++v, SIGSTOP); | |
780 | } | |
781 | ||
782 | /* | |
783 | * dokill - builtin - superset of kill (1) | |
784 | */ | |
785 | dokill(v) | |
786 | char **v; | |
787 | { | |
788 | register int signum; | |
789 | register char *name; | |
790 | ||
791 | v++; | |
792 | if (v[0] && v[0][0] == '-') { | |
793 | if (v[0][1] == 'l') { | |
794 | for (signum = 1; signum <= NSIG; signum++) { | |
795 | if (name = mesg[signum].iname) | |
796 | printf("%s ", name); | |
797 | if (signum == 16) | |
798 | printf("\n"); | |
799 | } | |
800 | printf("\n"); | |
801 | return; | |
802 | } | |
803 | if (digit(v[0][1])) { | |
804 | signum = atoi(v[0]+1); | |
805 | if (signum < 1 || signum > NSIG) | |
806 | bferr("Bad signal number"); | |
807 | } else { | |
808 | name = &v[0][1]; | |
809 | for (signum = 1; signum <= NSIG; signum++) | |
810 | if (mesg[signum].iname && | |
811 | eq(name, mesg[signum].iname)) | |
812 | goto gotsig; | |
813 | setname(name); | |
814 | bferr("Unknown signal; kill -l lists signals"); | |
815 | } | |
816 | gotsig: | |
817 | v++; | |
818 | } else | |
819 | signum = SIGTERM; | |
820 | pkill(v, signum); | |
821 | } | |
822 | ||
823 | pkill(v, signum) | |
824 | char **v; | |
825 | int signum; | |
826 | { | |
827 | register struct process *pp, *np; | |
828 | register int jobflags = 0; | |
829 | int pid; | |
830 | extern char *sys_errlist[]; | |
831 | int err = 0; | |
832 | ||
833 | if (setintr) | |
834 | sighold(SIGINT); | |
835 | sighold(SIGCHLD); | |
836 | while (*v) { | |
837 | if (**v == '%') { | |
838 | np = pp = pfind(*v); | |
839 | do | |
840 | jobflags |= np->p_flags; | |
841 | while ((np = np->p_friends) != pp); | |
842 | switch (signum) { | |
843 | ||
844 | case SIGSTOP: | |
845 | case SIGTSTP: | |
846 | case SIGTTIN: | |
847 | case SIGTTOU: | |
848 | if ((jobflags & PRUNNING) == 0) { | |
849 | printf("%s: Already stopped\n", *v); | |
850 | err++; | |
851 | goto cont; | |
852 | } | |
853 | } | |
854 | killpg(pp->p_jobid, signum); | |
855 | if (signum == SIGTERM || signum == SIGHUP) | |
856 | killpg(pp->p_jobid, SIGCONT); | |
857 | } else if (!digit(**v)) | |
858 | bferr("Arguments should be jobs or process id's"); | |
859 | else { | |
860 | pid = atoi(*v); | |
861 | if (kill(pid, signum) < 0) { | |
862 | printf("%d: ", pid); | |
863 | printf("%s\n", sys_errlist[errno]); | |
864 | err++; | |
865 | goto cont; | |
866 | } | |
867 | if (signum == SIGTERM || signum == SIGHUP) | |
868 | kill(pid, SIGCONT); | |
869 | } | |
870 | cont: | |
871 | v++; | |
872 | } | |
873 | sigrelse(SIGCHLD); | |
874 | if (setintr) | |
875 | sigrelse(SIGINT); | |
876 | if (err) | |
877 | error(NOSTR); | |
878 | } | |
879 | ||
880 | /* | |
881 | * pstart - start the job in foreground/background | |
882 | */ | |
883 | pstart(pp, foregnd) | |
884 | register struct process *pp; | |
885 | int foregnd; | |
886 | { | |
887 | register struct process *np; | |
888 | int jobflags = 0; | |
889 | ||
890 | sighold(SIGCHLD); | |
891 | np = pp; | |
892 | do { | |
893 | jobflags |= np->p_flags; | |
894 | if (np->p_flags&(PRUNNING|PSTOPPED)) { | |
895 | np->p_flags |= PRUNNING; | |
896 | np->p_flags &= ~PSTOPPED; | |
897 | if (foregnd) | |
898 | np->p_flags |= PFOREGND; | |
899 | else | |
900 | np->p_flags &= ~PFOREGND; | |
901 | } | |
902 | } while((np = np->p_friends) != pp); | |
a132d4ed BJ |
903 | if (!foregnd) |
904 | pclrcurr(pp); | |
2d4bbda8 BJ |
905 | pprint(pp, foregnd ? NAME|JOBDIR : NUMBER|NAME|AMPERSAND); |
906 | if (foregnd) | |
907 | ioctl(FSHTTY, TIOCSPGRP, &pp->p_jobid); | |
908 | if (jobflags&PSTOPPED) | |
909 | killpg(pp->p_jobid, SIGCONT); | |
910 | sigrelse(SIGCHLD); | |
911 | } | |
912 | ||
913 | panystop(neednl) | |
914 | { | |
915 | register struct process *pp; | |
916 | ||
917 | chkstop = 2; | |
918 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
919 | if (pp->p_flags & PSTOPPED) | |
920 | error("\nThere are stopped jobs" + 1 - neednl); | |
921 | } | |
922 | ||
923 | struct process * | |
924 | pfind(cp) | |
925 | char *cp; | |
926 | { | |
927 | register struct process *pp, *np; | |
928 | ||
929 | if (cp == 0 || cp[1] == 0 || eq(cp, "%%") || eq(cp, "%+")) { | |
930 | if (pcurrent == PNULL) | |
931 | bferr("No current job"); | |
932 | return (pcurrent); | |
933 | } | |
934 | if (eq(cp, "%-") || eq(cp, "%#")) { | |
935 | if (pprevious == PNULL) | |
936 | bferr("No previous job"); | |
937 | return (pprevious); | |
938 | } | |
939 | if (digit(cp[1])) { | |
940 | int index = atoi(cp+1); | |
941 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
942 | if (pp->p_index == index && pp->p_pid == pp->p_jobid) | |
943 | return (pp); | |
944 | bferr("No such job"); | |
945 | } | |
946 | np = PNULL; | |
947 | for (pp = proclist.p_next; pp; pp = pp->p_next) | |
948 | if (pp->p_pid == pp->p_jobid) { | |
949 | if (cp[1] == '?') { | |
950 | register char *dp; | |
951 | for (dp = pp->p_command; *dp; dp++) { | |
952 | if (*dp != cp[2]) | |
953 | continue; | |
954 | if (prefix(cp+2, dp)) | |
955 | goto match; | |
956 | } | |
957 | } else if (prefix(cp+1, pp->p_command)) { | |
958 | match: | |
959 | if (np) | |
960 | bferr("Ambiguous"); | |
961 | np = pp; | |
962 | } | |
963 | } | |
964 | if (np) | |
965 | return (np); | |
966 | if (cp[1] == '?') | |
967 | bferr("No job matches pattern"); | |
968 | else | |
969 | bferr("No such job"); | |
970 | } | |
971 | ||
972 | /* | |
a132d4ed | 973 | * pgetcurr - find most recent job that is not pp, preferably stopped |
2d4bbda8 BJ |
974 | */ |
975 | struct process * | |
976 | pgetcurr(pp) | |
977 | register struct process *pp; | |
978 | { | |
979 | register struct process *np; | |
a132d4ed | 980 | register struct process *xp = PNULL; |
2d4bbda8 BJ |
981 | |
982 | for (np = proclist.p_next; np; np = np->p_next) | |
983 | if (np != pcurrent && np != pp && np->p_pid && | |
984 | np->p_pid == np->p_jobid) { | |
a132d4ed BJ |
985 | if (np->p_flags & PSTOPPED) |
986 | return (np); | |
987 | if (xp == PNULL) | |
988 | xp = np; | |
2d4bbda8 | 989 | } |
a132d4ed | 990 | return (xp); |
2d4bbda8 BJ |
991 | } |
992 | ||
993 | /* | |
994 | * donotify - flag the job so as to report termination asynchronously | |
995 | */ | |
996 | donotify(v) | |
997 | char **v; | |
998 | { | |
999 | register struct process *pp; | |
1000 | ||
1001 | pp = pfind(*++v); | |
1002 | pp->p_flags |= PNOTIFY; | |
1003 | } | |
1004 | ||
1005 | /* | |
1006 | * Do the fork and whatever should be done in the child side that | |
1007 | * should not be done if we are not forking at all (like for simple builtin's) | |
1008 | * Also do everything that needs any signals fiddled with in the parent side | |
1009 | * | |
1010 | * Wanttty tells whether process and/or tty pgrps are to be manipulated: | |
1011 | * -1: leave tty alone; inherit pgrp from parent | |
1012 | * 0: already have tty; manipulate process pgrps only | |
1013 | * 1: want to claim tty; manipulate process and tty pgrps | |
1014 | * It is usually just the value of tpgrp. | |
1015 | */ | |
1016 | pfork(t, wanttty) | |
1017 | struct command *t; /* command we are forking for */ | |
1018 | int wanttty; | |
1019 | { | |
1020 | register int pid; | |
1021 | bool ignint = 0; | |
1022 | int pgrp; | |
1023 | ||
1024 | /* | |
1025 | * A child will be uninterruptible only under very special | |
1026 | * conditions. Remember that the semantics of '&' is | |
1027 | * implemented by disconnecting the process from the tty so | |
1028 | * signals do not need to ignored just for '&'. | |
1029 | * Thus signals are set to default action for children unless: | |
1030 | * we have had an "onintr -" (then specifically ignored) | |
1031 | * we are not playing with signals (inherit action) | |
1032 | */ | |
1033 | if (setintr) | |
1034 | ignint = (tpgrp == -1 && (t->t_dflg&FINT)) | |
1035 | || (gointr && eq(gointr, "-")); | |
1036 | /* | |
1037 | * Hold SIGCHLD until we have the process installed in our table. | |
1038 | */ | |
1039 | sighold(SIGCHLD); | |
1040 | while ((pid = fork()) < 0) | |
1041 | if (setintr == 0) | |
1042 | sleep(FORKSLEEP); | |
1043 | else { | |
1044 | sigrelse(SIGINT); | |
1045 | sigrelse(SIGCHLD); | |
1046 | error("No more processes"); | |
1047 | } | |
1048 | if (pid == 0) { | |
1049 | settimes(); | |
1050 | pgrp = pcurrjob ? pcurrjob->p_jobid : getpid(); | |
1051 | pflushall(); | |
1052 | pcurrjob = PNULL; | |
1053 | timesdone = 0; | |
1054 | child++; | |
1055 | if (setintr) { | |
1056 | setintr = 0; /* until I think otherwise */ | |
1057 | sigrelse(SIGCHLD); | |
1058 | /* | |
1059 | * Children just get blown away on SIGINT, SIGQUIT | |
1060 | * unless "onintr -" seen. | |
1061 | */ | |
1062 | signal(SIGINT, ignint ? SIG_IGN : SIG_DFL); | |
1063 | signal(SIGQUIT, ignint ? SIG_IGN : SIG_DFL); | |
1064 | if (wanttty >= 0) { | |
1065 | /* make stoppable */ | |
1066 | signal(SIGTSTP, SIG_DFL); | |
1067 | signal(SIGTTIN, SIG_DFL); | |
1068 | signal(SIGTTOU, SIG_DFL); | |
1069 | } | |
1070 | signal(SIGTERM, parterm); | |
1071 | } else if (tpgrp == -1 && (t->t_dflg&FINT)) { | |
1072 | signal(SIGINT, SIG_IGN); | |
1073 | signal(SIGQUIT, SIG_IGN); | |
1074 | } | |
1075 | if (wanttty > 0) | |
1076 | ioctl(FSHTTY, TIOCSPGRP, &pgrp); | |
1077 | if (wanttty >= 0 && tpgrp >= 0) | |
1078 | setpgrp(0, pgrp); | |
1079 | if (tpgrp > 0) | |
1080 | tpgrp = 0; /* gave tty away */ | |
1081 | /* | |
1082 | * Nohup and nice apply only to TCOM's but it would be | |
1083 | * nice (?!?) if you could say "nohup (foo;bar)" | |
1084 | * Then the parser would have to know about nice/nohup/time | |
1085 | */ | |
1086 | if (t->t_dflg & FNOHUP) | |
1087 | signal(SIGHUP, SIG_IGN); | |
1088 | if (t->t_dflg & FNICE) { | |
1089 | /* sigh... | |
1090 | nice(20); | |
1091 | nice(-10); | |
1092 | */ | |
1093 | nice(t->t_nice); | |
1094 | } | |
1095 | ||
1096 | } else { | |
1097 | palloc(pid, t); | |
1098 | sigrelse(SIGCHLD); | |
1099 | } | |
1100 | ||
1101 | return (pid); | |
1102 | } | |
1103 | ||
1104 | okpcntl() | |
1105 | { | |
1106 | ||
1107 | if (tpgrp == -1) | |
1108 | error("No job control in this shell"); | |
1109 | if (tpgrp == 0) | |
1110 | error("No job control in subshells"); | |
1111 | } |