1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.proc.c,v 3.121 2012/01/25 15:34:41 christos Exp $ */
3 * sh.proc.c: Job manipulations
6 * Copyright (c) 1980, 1991 The Regents of the University of California.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 RCSID("$tcsh: sh.proc.c,v 3.121 2012/01/25 15:34:41 christos Exp $")
44 #endif /* WINNT_NATIVE */
50 #if defined(_BSD) || (defined(IRIS4D) && __STDC__) || defined(__lucid) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)
51 # if !defined(__ANDROID__)
54 #endif /* _BSD || (IRIS4D && __STDC__) || __lucid || glibc */
56 # define WTERMSIG(w) (((union wait *) &(w))->w_termsig)
59 # endif /* !BSDWAIT */
60 #endif /* !WTERMSIG */
62 # define WEXITSTATUS(w) (((union wait *) &(w))->w_retcode)
63 #endif /* !WEXITSTATUS */
65 # define WSTOPSIG(w) (((union wait *) &(w))->w_stopsig)
66 #endif /* !WSTOPSIG */
70 # define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
76 # define WCOREDUMP(w) (((union wait *) &(w))->w_coredump)
78 # define WCOREDUMP(w) ((w) & 0200)
79 # endif /* !BSDWAIT */
80 #endif /* !WCOREDUMP */
83 # define jobdebug_xprintf(x) (void)0
84 # define jobdebug_flush() (void)0
86 # define jobdebug_xprintf(s) xprintf s
87 # define jobdebug_flush() flush()
91 * C Shell - functions that manage processes, handling hanging, termination
94 #define BIGINDEX 9 /* largest desirable job index */
98 /* use 'cvxrusage' to get parallel statistics */
99 static struct cvxrusage zru = {{0L, 0L}, {0L, 0L}, 0L, 0L, 0L, 0L,
100 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L,
101 {0L, 0L}, 0LL, 0LL, 0LL, 0LL, 0L, 0L, 0L,
102 0LL, 0LL, {0L, 0L, 0L, 0L, 0L}};
104 static struct rusage zru;
106 #else /* !BSDTIMES */
108 static struct process_stats zru = {{0L, 0L}, {0L, 0L}, 0, 0, 0, 0, 0, 0, 0,
109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
110 # else /* !_SEQUENT_ */
112 static struct tms zru = {0, 0, 0, 0}, lru = {0, 0, 0, 0};
114 static struct tms zru = {0L, 0L, 0L, 0L}, lru = {0L, 0L, 0L, 0L};
116 # endif /* !_SEQUENT_ */
117 #endif /* !BSDTIMES */
120 static int timesdone; /* shtimes buffer full ? */
121 #endif /* BSDTIMES */
123 #ifndef RUSAGE_CHILDREN
124 # define RUSAGE_CHILDREN -1
125 #endif /* RUSAGE_CHILDREN */
127 static void pflushall (void);
128 static void pflush (struct process *);
129 static void pfree (struct process *);
130 static void pclrcurr (struct process *);
131 static void morecommand (size_t);
132 static void padd (struct command *);
133 static int pprint (struct process *, int);
134 static void ptprint (struct process *);
135 static void pads (Char *);
136 static void pkill (Char **, int);
137 static struct process *pgetcurr (struct process *);
138 static void okpcntl (void);
139 static void setttypgrp (int);
142 * pchild - call queued by the SIGCHLD signal
143 * indicating that at least one child has terminated or stopped
144 * thus at least one wait system call will definitely return a
145 * childs status. Top level routines (like pwait) must be sure
146 * to mask interrupts when playing with the proclist data structures!
158 #endif /* !BSDWAIT */
162 #else /* !BSDTIMES */
164 struct process_stats ru;
165 struct process_stats cpst1, cpst2;
167 # else /* !_SEQUENT_ */
168 struct tms proctimes;
172 (void) times(&shtimes);
174 # endif /* !_SEQUENT_ */
175 #endif /* !BSDTIMES */
177 jobdebug_xprintf(("pchild()\n"));
180 jobdebug_xprintf(("Waiting...\n"));
182 errno = 0; /* reset, just in case */
188 /* use 'cvxwait' to get parallel statistics */
190 (setintr && (intty || insource) ? WNOHANG | WUNTRACED : WNOHANG), &ru);
192 /* both a wait3 and rusage */
193 # if !defined(BSDWAIT) || defined(NeXT) || defined(MACH) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__) || (defined(IRIS4D) && SYSVREL <= 3) || defined(__lucid) || defined(__osf__)
195 (setintr && (intty || insource) ? WNOHANG | WUNTRACED : WNOHANG), &ru);
197 pid = wait3(&w.w_status,
198 (setintr && (intty || insource) ? WNOHANG | WUNTRACED : WNOHANG), &ru);
199 # endif /* BSDWAIT */
201 # else /* !BSDTIMES */
203 (void) get_process_stats(&tv, PS_SELF, 0, &cpst1);
204 pid = waitpid(-1, &w,
205 (setintr && (intty || insource) ? WNOHANG | WUNTRACED : WNOHANG));
206 (void) get_process_stats(&tv, PS_SELF, 0, &cpst2);
207 pr_stat_sub(&cpst2, &cpst1, &ru);
208 # else /* !_SEQUENT_ */
210 /* we have a wait3, but no rusage stuff */
211 pid = wait3(&w.w_status,
212 (setintr && (intty || insource) ? WNOHANG | WUNTRACED : WNOHANG), 0);
214 pid = waitpid(-1, &w,
215 (setintr && (intty || insource) ? WNOHANG | WUNTRACED : WNOHANG));
217 # endif /* !_SEQUENT_ */
218 # endif /* !BSDTIMES */
219 # else /* !BSDJOBS */
222 /* both a wait3 and rusage */
224 pid = wait3(&w.w_status, WNOHANG, 0);
227 pid = wait3(&w, WNOHANG, &ru);
229 pid = wait3(&w.w_status, WNOHANG, &ru);
230 # endif /* BSDWAIT */
232 # else /* !BSDTIMES */
233 # ifdef ODT /* For Sco Unix 3.2.0 or ODT 1.0 */
235 pid = waitpid(-1, &w,
236 (setintr && (intty || insource) ? WNOHANG | WUNTRACED : WNOHANG));
238 # if defined(aiws) || defined(uts)
240 pid = wait3(&w.w_status,
241 (setintr && (intty || insource) ? WNOHANG | WUNTRACED : WNOHANG), 0);
242 # endif /* aiws || uts */
245 /* no wait3, therefore no rusage */
246 /* on Sys V, this may hang. I hope it's not going to be a problem */
250 * XXX: for greater than 3 we should use waitpid().
251 * but then again, SVR4 falls into the POSIX/BSDJOBS category.
253 pid = wait(&w.w_status);
254 # endif /* BSDWAIT */
255 # endif /* !HAVEwait3 */
256 # endif /* !BSDTIMES */
257 # endif /* !BSDJOBS */
258 #else /* WINNT_NATIVE */
259 pid = waitpid(-1, &w,
260 (setintr && (intty || insource) ? WNOHANG | WUNTRACED : WNOHANG));
261 #endif /* WINNT_NATIVE */
263 jobdebug_xprintf(("parent %d pid %d, retval %x termsig %x retcode %x\n",
264 (int)getpid(), (int)pid, w, WTERMSIG(w),
268 if ((pid == 0) || (pid == -1)) {
269 (void)handle_pending_signals();
270 jobdebug_xprintf(("errno == %d\n", errno));
275 for (pp = proclist.p_next; pp != NULL; pp = pp->p_next)
276 if (pid == pp->p_procid)
278 #if !defined(BSDJOBS) && !defined(WINNT_NATIVE)
279 /* this should never have happened */
280 stderror(ERR_SYNC, pid);
282 #else /* BSDJOBS || WINNT_NATIVE */
284 #endif /* !BSDJOBS && !WINNT_NATIVE */
286 pp->p_flags &= ~(PRUNNING | PSTOPPED | PREPORTED);
288 pp->p_flags |= PSTOPPED;
289 pp->p_reason = WSTOPSIG(w);
292 if (pp->p_flags & (PTIME | PPTIME) || adrof(STRtime))
295 (void) get_process_stats(&pp->p_etime, PS_SELF, NULL, NULL);
296 # else /* !_SEQUENT_ */
297 pp->p_etime = times(&proctimes);
298 # endif /* !_SEQUENT_ */
300 (void) gettimeofday(&pp->p_etime, NULL);
301 #endif /* BSDTIMES */
304 #if defined(BSDTIMES) || defined(_SEQUENT_)
306 #else /* !BSDTIMES && !_SEQUENT_ */
307 (void) times(&proctimes);
308 pp->p_utime = proctimes.tms_cutime - shtimes.tms_cutime;
309 pp->p_stime = proctimes.tms_cstime - shtimes.tms_cstime;
311 #endif /* !BSDTIMES && !_SEQUENT_ */
312 if (WIFSIGNALED(w)) {
313 if (WTERMSIG(w) == SIGINT)
314 pp->p_flags |= PINTERRUPTED;
316 pp->p_flags |= PSIGNALED;
318 pp->p_flags |= PDUMPED;
319 pp->p_reason = WTERMSIG(w);
322 pp->p_reason = WEXITSTATUS(w);
323 if (pp->p_reason != 0)
324 pp->p_flags |= PAEXITED;
326 pp->p_flags |= PNEXITED;
332 if ((fp->p_flags & (PPTIME | PRUNNING | PSTOPPED)) == 0 &&
333 !child && adrof(STRtime) &&
335 fp->p_rusage.ru_utime.tv_sec + fp->p_rusage.ru_stime.tv_sec
336 #else /* !BSDTIMES */
338 fp->p_rusage.ps_utime.tv_sec + fp->p_rusage.ps_stime.tv_sec
339 # else /* !_SEQUENT_ */
341 (fp->p_utime + fp->p_stime) / HZ
343 (fp->p_utime + fp->p_stime) / clk_tck
345 # endif /* !_SEQUENT_ */
346 #endif /* !BSDTIMES */
347 >= atoi(short2str(varval(STRtime))))
348 fp->p_flags |= PTIME;
349 jobflags |= fp->p_flags;
350 } while ((fp = fp->p_friends) != pp);
351 pp->p_flags &= ~PFOREGND;
352 if (pp == pp->p_friends && (pp->p_flags & PPTIME)) {
353 pp->p_flags &= ~PPTIME;
354 pp->p_flags |= PTIME;
356 if ((jobflags & (PRUNNING | PREPORTED)) == 0) {
359 if (fp->p_flags & PSTOPPED)
360 fp->p_flags |= PREPORTED;
361 } while ((fp = fp->p_friends) != pp);
362 while (fp->p_procid != fp->p_jobid)
364 if (jobflags & PSTOPPED) {
365 if (pcurrent && pcurrent != fp)
366 pprevious = pcurrent;
371 if (jobflags & PFOREGND) {
372 if (!(jobflags & (PSIGNALED | PSTOPPED | PPTIME) ||
374 jobflags & PAEXITED ||
377 !eq(dcwd->di_name, fp->p_cwd->di_name))) {
378 /* PWP: print a newline after ^C */
379 if (jobflags & PINTERRUPTED) {
380 xputchar('\r' | QUOTE);
384 else if ((jobflags & (PTIME|PSTOPPED)) == PTIME)
390 if (jobflags & PNOTIFY || adrof(STRnotify)) {
391 xputchar('\r' | QUOTE);
393 (void) pprint(pp, NUMBER | NAME | REASON);
394 if ((jobflags & PSTOPPED) == 0)
401 * don't really want to do that, because it
402 * will erase our message in case of multi-line
412 fp->p_flags |= PNEEDNOTE;
417 #if defined(BSDJOBS) || defined(HAVEwait3) ||defined(WINNT_NATIVE)
419 #endif /* BSDJOBS || HAVEwait3 */
431 for (pp = proclist.p_next; pp != NULL; pp = pp->p_next) {
432 if (pp->p_flags & PNEEDNOTE) {
434 cleanup_push(&pchild_disabled, disabled_cleanup);
435 pp->p_flags &= ~PNEEDNOTE;
436 flags = pprint(pp, NUMBER | NAME | REASON);
437 if ((flags & (PRUNNING | PSTOPPED)) == 0)
439 cleanup_until(&pchild_disabled);
446 pfree(struct process *pp)
448 xfree(pp->p_command);
449 if (pp->p_cwd && --pp->p_cwd->di_count == 0)
450 if (pp->p_cwd->di_next == 0)
457 * pwait - wait for current job to terminate, maintaining integrity
458 * of current and previous job indicators.
463 struct process *fp, *pp;
466 * Here's where dead procs get flushed.
468 for (pp = (fp = &proclist)->p_next; pp != NULL; pp = (fp = pp)->p_next)
469 if (pp->p_procid == 0) {
470 fp->p_next = pp->p_next;
479 * pjwait - wait for a job to finish or become stopped
480 * It is assumed to be in the foreground state (PFOREGND)
483 pjwait(struct process *pp)
486 int jobflags, reason;
487 sigset_t oset, set, pause_mask;
490 while (pp->p_procid != pp->p_jobid)
495 if ((fp->p_flags & (PFOREGND | PRUNNING)) == PRUNNING)
496 xprintf("%s", CGETS(17, 1, "BUG: waiting for background job!\n"));
497 } while ((fp = fp->p_friends) != pp);
499 * Now keep pausing as long as we are not interrupted (SIGINT), and the
500 * target process, or any of its friends, are running
504 sigaddset(&set, SIGINT);
505 sigaddset(&set, SIGCHLD);
506 (void)sigprocmask(SIG_BLOCK, &set, &oset);
507 cleanup_push(&oset, sigprocmask_cleanup);
509 sigdelset(&pause_mask, SIGCHLD);
511 (void)handle_pending_signals();
514 jobflags |= fp->p_flags;
515 while ((fp = (fp->p_friends)) != pp);
516 if ((jobflags & PRUNNING) == 0)
518 jobdebug_xprintf(("%d starting to sigsuspend for SIGCHLD on %d\n",
519 getpid(), fp->p_procid));
520 sigsuspend(&pause_mask);
522 cleanup_until(&oset);
523 jobdebug_xprintf(("%d returned from sigsuspend loop\n", getpid()));
525 if (tpgrp > 0) /* get tty back */
526 (void) tcsetpgrp(FSHTTY, tpgrp);
528 if ((jobflags & (PSIGNALED | PSTOPPED | PTIME)) ||
529 fp->p_cwd == NULL || !eq(dcwd->di_name, fp->p_cwd->di_name)) {
530 if (jobflags & PSTOPPED) {
532 if (adrof(STRlistjobs)) {
535 jobcommand[0] = STRjobs;
536 if (eq(varval(STRlistjobs), STRlong))
537 jobcommand[1] = STRml;
539 jobcommand[1] = NULL;
540 jobcommand[2] = NULL;
542 dojobs(jobcommand, NULL);
543 (void) pprint(pp, SHELLDIR);
546 (void) pprint(pp, AREASON | SHELLDIR);
549 (void) pprint(pp, AREASON | SHELLDIR);
551 if ((jobflags & (PINTERRUPTED | PSTOPPED)) && setintr &&
552 (!gointr || !eq(gointr, STRminus))) {
553 if ((jobflags & PSTOPPED) == 0)
561 /* In case of pipelines only the result of the last
562 * command should be taken in account */
563 if (!anyerror && !(fp->p_flags & PBRACE)
564 && ((fp->p_flags & PPOU) || (fp->p_flags & PBACKQ)))
567 reason = fp->p_flags & (PSIGNALED | PINTERRUPTED) ?
568 fp->p_reason | META : fp->p_reason;
569 } while ((fp = fp->p_friends) != pp);
571 * Don't report on backquoted jobs, cause it will mess up
574 if ((reason != 0) && (adrof(STRprintexitvalue)) &&
575 (pp->p_flags & PBACKQ) == 0)
576 xprintf(CGETS(17, 2, "Exit %d\n"), reason);
577 reason_str = putn((tcsh_number_t)reason);
578 cleanup_push(reason_str, xfree);
579 setv(STRstatus, reason_str, VAR_READWRITE);
580 cleanup_ignore(reason_str);
581 cleanup_until(reason_str);
582 if (reason && exiterr)
588 * dowait - wait for all processes to finish
593 dowait(Char **v, struct command *c)
597 int opintr_disabled, gotsig;
602 sigprocmask(SIG_BLOCK, NULL, &pause_mask);
603 sigdelset(&pause_mask, SIGCHLD);
605 sigdelset(&pause_mask, SIGINT);
607 for (pp = proclist.p_next; pp; pp = pp->p_next)
608 if (pp->p_procid && /* pp->p_procid == pp->p_jobid && */
609 pp->p_flags & PRUNNING) {
610 (void)handle_pending_signals();
611 sigsuspend(&pause_mask);
612 opintr_disabled = pintr_disabled;
614 gotsig = handle_pending_signals();
615 pintr_disabled = opintr_disabled;
624 * pflushall - flush all jobs from list (e.g. at fork())
631 for (pp = proclist.p_next; pp != NULL; pp = pp->p_next)
637 * pflush - flag all process structures in the same job as the
638 * the argument process for deletion. The actual free of the
639 * space is not done here since pflush is called at interrupt level.
642 pflush(struct process *pp)
647 if (pp->p_procid == 0) {
648 xprintf("%s", CGETS(17, 3, "BUG: process flushed twice"));
651 while (pp->p_procid != pp->p_jobid)
659 np->p_index = np->p_procid = 0;
660 np->p_flags &= ~PNEEDNOTE;
661 } while ((np = np->p_friends) != pp);
662 if (idx == pmaxindex) {
663 for (np = proclist.p_next, idx = 0; np; np = np->p_next)
664 if (np->p_index > idx)
671 * pclrcurr - make sure the given job is not the current or previous job;
672 * pp MUST be the job leader
675 pclrcurr(struct process *pp)
677 if (pp == pcurrent) {
678 if (pprevious != NULL) {
679 pcurrent = pprevious;
680 pprevious = pgetcurr(pp);
683 pcurrent = pgetcurr(pp);
684 pprevious = pgetcurr(pp);
687 else if (pp == pprevious)
688 pprevious = pgetcurr(pp);
691 /* +4 here is 1 for '\0', 1 ea for << >& >> */
693 static size_t cmdmax;
694 static size_t cmdlen;
696 #define CMD_INIT 1024
700 morecommand(size_t s)
706 ncmdstr = xrealloc(cmdstr, cmdmax * sizeof(*cmdstr));
707 d = ncmdstr - cmdstr;
713 * unparse - Export padd() functionality
716 unparse(struct command *t)
719 morecommand(CMD_INIT);
724 return Strsave(cmdstr);
729 * palloc - allocate a process structure and fill it up.
730 * an important assumption is made that the process is running.
733 palloc(pid_t pid, struct command *t)
738 pp = xcalloc(1, sizeof(struct process));
740 pp->p_parentid = shpgrp;
741 pp->p_flags = ((t->t_dflg & F_AMPERSAND) ? 0 : PFOREGND) | PRUNNING;
742 if (t->t_dflg & F_TIME)
743 pp->p_flags |= PPTIME;
744 if (t->t_dflg & F_BACKQ)
745 pp->p_flags |= PBACKQ;
746 if (t->t_dflg & F_HUP)
748 if (t->t_dcom && t->t_dcom[0] && (*t->t_dcom[0] == '{'))
749 pp->p_flags |= PBRACE;
751 morecommand(CMD_INIT);
756 if (t->t_dflg & F_PIPEOUT) {
758 if (t->t_dflg & F_STDERR)
759 pp->p_flags |= PDIAG;
761 pp->p_command = Strsave(cmdstr);
765 /* careful here with interrupt level */
767 pp->p_index = pcurrjob->p_index;
768 pp->p_friends = pcurrjob;
769 pp->p_jobid = pcurrjob->p_procid;
770 for (fp = pcurrjob; fp->p_friends != pcurrjob; fp = fp->p_friends)
780 if (pmaxindex < BIGINDEX)
781 pp->p_index = ++pmaxindex;
786 for (np = proclist.p_next; np; np = np->p_next)
787 if (np->p_index == i)
796 if (pcurrent == NULL)
798 else if (pprevious == NULL)
801 pp->p_next = proclist.p_next;
802 proclist.p_next = pp;
804 (void) gettimeofday(&pp->p_btime, NULL);
805 #else /* !BSDTIMES */
807 (void) get_process_stats(&pp->p_btime, PS_SELF, NULL, NULL);
808 # else /* !_SEQUENT_ */
812 pp->p_btime = times(&tmptimes);
814 # endif /* !_SEQUENT_ */
815 #endif /* !BSDTIMES */
819 padd(struct command *t)
834 for (argp = t->t_dcom; *argp; argp++) {
868 if ((t->t_dflg & F_PIPEIN) == 0 && t->t_dlef) {
869 pads((t->t_dflg & F_READ) ? STRspLarrow2sp : STRspLarrowsp);
872 if ((t->t_dflg & F_PIPEOUT) == 0 && t->t_drit) {
873 pads((t->t_dflg & F_APPEND) ? STRspRarrow2 : STRspRarrow);
874 if (t->t_dflg & F_STDERR)
887 * Avoid the Quoted Space alias hack! Reported by:
888 * sam@john-bigboote.ICS.UCI.EDU (Sam Horrocks)
890 if (cp[0] == STRQNULL[0])
895 len = cmdlen + i + CMD_INCR;
898 (void) Strcpy(cmdp, cp);
904 * psavejob - temporarily save the current job on a one level stack
905 * so another job can be created. Used for { } in exp6
906 * and `` in globbing.
916 psavejob_cleanup(void *dummy)
924 * pendjob - indicate that a job (set of commands) has been completed
925 * or is about to begin.
930 struct process *pp, *tp;
932 if (pcurrjob && (pcurrjob->p_flags & (PFOREGND | PSTOPPED)) == 0) {
935 while (pp->p_procid != pp->p_jobid)
937 xprintf("[%d]", pp->p_index);
940 xprintf(" %d", pp->p_procid);
945 pholdjob = pcurrjob = 0;
949 * pprint - print a job
953 * Hacks have been added for SVR4 to deal with pipe's being spawned in
956 * David Dawes (dawes@physics.su.oz.au) Oct 1991
960 pprint(struct process *pp, int flag)
964 int jobflags, pstatus, pcond;
968 struct process *pipehead = NULL, *pipetail = NULL, *pmarker = NULL;
970 #endif /* BACKPIPE */
972 while (pp->p_procid != pp->p_jobid)
974 if (pp == pp->p_friends && (pp->p_flags & PPTIME)) {
975 pp->p_flags &= ~PPTIME;
976 pp->p_flags |= PTIME;
979 status = reason = -1;
984 * The pipeline is reversed, so locate the real head of the pipeline
985 * if pp is at the tail of a pipe (and not already in a pipeline)
987 if ((pp->p_friends->p_flags & PPOU) && !inpipe && (flag & NAME)) {
992 while (pp->p_friends->p_flags & PPOU);
996 * pmarker is used to hold the place of the proc being processed, so
997 * we can search for the next one downstream later.
1000 pcond = (tp != pp || (inpipe && tp == pp));
1001 #else /* !BACKPIPE */
1003 #endif /* BACKPIPE */
1005 jobflags |= pp->p_flags;
1006 pstatus = (int) (pp->p_flags & PALLSTATES);
1007 if (pcond && linp != linbuf && !(flag & FANCY) &&
1008 ((pstatus == status && pp->p_reason == reason) ||
1012 if (pcond && linp != linbuf)
1014 if (flag & NUMBER) {
1016 pcond = ((pp == tp && !inpipe) ||
1017 (inpipe && pipetail == tp && pp == pipehead));
1018 #else /* BACKPIPE */
1020 #endif /* BACKPIPE */
1022 xprintf("[%d]%s %c ", pp->p_index,
1023 pp->p_index < 10 ? " " : "",
1024 pp == pcurrent ? '+' :
1025 (pp == pprevious ? '-' : ' '));
1030 xprintf("%5d ", pp->p_procid);
1032 xprintf("%11s ", sitename(pp->p_procid));
1035 if (flag & (REASON | AREASON)) {
1040 if (pstatus == status) {
1041 if (pp->p_reason == reason) {
1042 xprintf(format, "");
1046 reason = (int) pp->p_reason;
1050 reason = (int) pp->p_reason;
1055 xprintf(format, CGETS(17, 4, "Running "));
1062 * tell what happened to the background job
1063 * From: Michael Schroeder
1064 * <mlschroe@immd4.informatik.uni-erlangen.de>
1067 || ((flag & AREASON)
1069 && (reason != SIGPIPE
1070 || (pp->p_flags & PPOU) == 0))) {
1075 ptr = (char *)(intptr_t)mesg[pp->p_reason & 0177].pname;
1077 ptr = xasprintf("%s %d", CGETS(17, 5, "Signal"),
1078 pp->p_reason & 0177);
1079 cleanup_push(ptr, xfree);
1082 xprintf(format, ptr);
1092 if (flag & REASON) {
1094 xprintf(CGETS(17, 6, "Exit %-25d"), pp->p_reason);
1096 xprintf(format, CGETS(17, 7, "Done"));
1101 xprintf(CGETS(17, 8, "BUG: status=%-9o"),
1108 xprintf("%S", pp->p_command);
1109 if (pp->p_flags & PPOU)
1111 if (pp->p_flags & PDIAG)
1114 if (flag & (REASON | AREASON) && pp->p_flags & PDUMPED)
1115 xprintf("%s", CGETS(17, 9, " (core dumped)"));
1116 if (tp == pp->p_friends) {
1117 if (flag & AMPERSAND)
1119 if (flag & JOBDIR &&
1120 !eq(tp->p_cwd->di_name, dcwd->di_name)) {
1121 xprintf("%s", CGETS(17, 10, " (wd: "));
1122 dtildepr(tp->p_cwd->di_name);
1126 if (pp->p_flags & PPTIME && !(status & (PSTOPPED | PRUNNING))) {
1129 #if defined(BSDTIMES) || defined(_SEQUENT_)
1130 prusage(&zru, &pp->p_rusage, &pp->p_etime,
1132 #else /* !BSDTIMES && !SEQUENT */
1133 lru.tms_utime = pp->p_utime;
1134 lru.tms_stime = pp->p_stime;
1137 prusage(&zru, &lru, pp->p_etime,
1139 #endif /* !BSDTIMES && !SEQUENT */
1143 pcond = ((tp == pp->p_friends && !inpipe) ||
1144 (inpipe && pipehead->p_friends == tp && pp == pipetail));
1145 #else /* !BACKPIPE */
1146 pcond = (tp == pp->p_friends);
1147 #endif /* BACKPIPE */
1151 if (flag & SHELLDIR && !eq(tp->p_cwd->di_name, dcwd->di_name)) {
1152 xprintf("%s", CGETS(17, 11, "(wd now: "));
1153 dtildepr(dcwd->di_name);
1160 * if pmaker == pipetail, we are finished that pipeline, and
1161 * can now skip to past the head
1163 if (pmarker == pipetail) {
1169 * set pp to one before the one we want next, so the while below
1170 * increments to the correct spot.
1174 while (pp->p_friends->p_friends != pmarker);
1175 pmarker = pp->p_friends;
1178 pcond = ((pp = pp->p_friends) != tp || inpipe);
1179 #else /* !BACKPIPE */
1180 pcond = ((pp = pp->p_friends) != tp);
1181 #endif /* BACKPIPE */
1184 if (jobflags & PTIME && (jobflags & (PSTOPPED | PRUNNING)) == 0) {
1185 if (jobflags & NUMBER)
1193 * All 4.3 BSD derived implementations are buggy and I've had enough.
1194 * The following implementation produces similar code and works in all
1195 * cases. The 4.3BSD one works only for <, >, !=
1198 # define timercmp(tvp, uvp, cmp) \
1199 (((tvp)->tv_sec == (uvp)->tv_sec) ? \
1200 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \
1201 ((tvp)->tv_sec cmp (uvp)->tv_sec))
1204 ptprint(struct process *tp)
1207 struct timeval tetime, diff;
1208 static struct timeval ztime;
1209 struct sysrusage ru;
1210 struct process *pp = tp;
1215 ruadd(&ru, &pp->p_rusage);
1216 tvsub(&diff, &pp->p_etime, &pp->p_btime);
1217 if (timercmp(&diff, &tetime, >))
1219 } while ((pp = pp->p_friends) != tp);
1220 prusage(&zru, &ru, &tetime, &ztime);
1221 #else /* !BSDTIMES */
1223 timeval_t tetime, diff;
1224 static timeval_t ztime;
1225 struct process_stats ru;
1226 struct process *pp = tp;
1231 ruadd(&ru, &pp->p_rusage);
1232 tvsub(&diff, &pp->p_etime, &pp->p_btime);
1233 if (timercmp(&diff, &tetime, >))
1235 } while ((pp = pp->p_friends) != tp);
1236 prusage(&zru, &ru, &tetime, &ztime);
1237 # else /* !_SEQUENT_ */
1239 static time_t ztime = 0;
1240 static time_t zu_time = 0;
1241 static time_t zs_time = 0;
1242 time_t tetime, diff;
1243 time_t u_time, s_time;
1246 static clock_t ztime = 0;
1247 static clock_t zu_time = 0;
1248 static clock_t zs_time = 0;
1249 clock_t tetime, diff;
1250 clock_t u_time, s_time;
1253 struct tms zts, rts;
1254 struct process *pp = tp;
1260 u_time += pp->p_utime;
1261 s_time += pp->p_stime;
1262 diff = pp->p_etime - pp->p_btime;
1265 } while ((pp = pp->p_friends) != tp);
1266 zts.tms_utime = zu_time;
1267 zts.tms_stime = zs_time;
1270 rts.tms_utime = u_time;
1271 rts.tms_stime = s_time;
1274 prusage(&zts, &rts, tetime, ztime);
1275 # endif /* !_SEQUENT_ */
1276 #endif /* !BSDTIMES */
1280 * dojobs - print all jobs
1284 dojobs(Char **v, struct command *c)
1287 int flag = NUMBER | NAME | REASON;
1294 if (v[1] || !eq(*v, STRml))
1296 flag |= FANCY | JOBDIR;
1298 for (i = 1; i <= pmaxindex; i++)
1299 for (pp = proclist.p_next; pp; pp = pp->p_next)
1300 if (pp->p_index == i && pp->p_procid == pp->p_jobid) {
1301 pp->p_flags &= ~PNEEDNOTE;
1302 if (!(pprint(pp, flag) & (PRUNNING | PSTOPPED)))
1309 * dofg - builtin - put the job into the foreground
1313 dofg(Char **v, struct command *c)
1322 if (!pstart(pp, 1)) {
1324 stderror(ERR_NAME|ERR_BADJOB, pp->p_command, strerror(errno));
1328 } while (*v && *++v);
1332 * %... - builtin - put the job into the foreground
1336 dofg1(Char **v, struct command *c)
1343 if (!pstart(pp, 1)) {
1345 stderror(ERR_NAME|ERR_BADJOB, pp->p_command, strerror(errno));
1352 * dobg - builtin - put the job into the background
1356 dobg(Char **v, struct command *c)
1365 if (!pstart(pp, 0)) {
1367 stderror(ERR_NAME|ERR_BADJOB, pp->p_command, strerror(errno));
1369 } while (*v && *++v);
1373 * %... & - builtin - put the job into the background
1377 dobg1(Char **v, struct command *c)
1383 if (!pstart(pp, 0)) {
1385 stderror(ERR_NAME|ERR_BADJOB, pp->p_command, strerror(errno));
1390 * dostop - builtin - stop the job
1394 dostop(Char **v, struct command *c)
1398 pkill(++v, SIGSTOP);
1399 #endif /* BSDJOBS */
1403 * dokill - builtin - superset of kill (1)
1407 dokill(Char **v, struct command *c)
1409 int signum, len = 0;
1415 if (v[0] && v[0][0] == '-') {
1416 if (v[0][1] == 'l') {
1417 for (signum = 0; signum <= nsig; signum++) {
1418 if ((name = mesg[signum].iname) != NULL) {
1419 len += strlen(name) + 1;
1420 if (len >= TermH - 1) {
1422 len = strlen(name) + 1;
1424 xprintf("%s ", name);
1431 if (v[0][1] == 's') {
1436 stderror(ERR_NAME | ERR_TOOFEW);
1439 if (Isdigit(*sigptr)) {
1441 signum = strtoul(short2str(sigptr), &ep, 0);
1442 if (*ep || signum < 0 || signum > (MAXSIG-1))
1443 stderror(ERR_NAME | ERR_BADSIG);
1446 for (signum = 0; signum <= nsig; signum++)
1447 if (mesg[signum].iname &&
1448 eq(sigptr, str2short(mesg[signum].iname)))
1450 setname(short2str(sigptr));
1451 stderror(ERR_NAME | ERR_UNKSIG);
1462 pkill(Char **v, int signum)
1464 struct process *pp, *np;
1465 int jobflags = 0, err1 = 0;
1467 Char *cp, **vp, **globbed;
1469 /* Avoid globbing %?x patterns */
1470 for (vp = v; vp && *vp; vp++)
1474 v = glob_all_or_error(v);
1476 cleanup_push(globbed, blk_cleanup);
1479 cleanup_push(&pchild_disabled, disabled_cleanup);
1482 cleanup_push(&pintr_disabled, disabled_cleanup);
1485 while (v && (cp = *v)) {
1487 np = pp = pfind(cp);
1489 jobflags |= np->p_flags;
1490 while ((np = np->p_friends) != pp);
1498 if ((jobflags & PRUNNING) == 0) {
1500 xprintf(CGETS(17, 12, "%S: Already suspended\n"), cp);
1501 # else /* !SUSPENDED */
1502 xprintf(CGETS(17, 13, "%S: Already stopped\n"), cp);
1503 # endif /* !SUSPENDED */
1509 * suspend a process, kill -CONT %, then type jobs; the shell
1510 * says it is suspended, but it is running; thanks jaap..
1513 if (!pstart(pp, 0)) {
1515 stderror(ERR_NAME|ERR_BADJOB, pp->p_command,
1522 #endif /* BSDJOBS */
1523 if (killpg(pp->p_jobid, signum) < 0) {
1524 xprintf("%S: %s\n", cp, strerror(errno));
1528 if (signum == SIGTERM || signum == SIGHUP)
1529 (void) killpg(pp->p_jobid, SIGCONT);
1530 #endif /* BSDJOBS */
1532 else if (!(Isdigit(*cp) || *cp == '-'))
1533 stderror(ERR_NAME | ERR_JOBARGS);
1536 #ifndef WINNT_NATIVE
1537 pid = strtol(short2str(cp), &ep, 10);
1539 pid = strtoul(short2str(cp), &ep, 0);
1540 #endif /* WINNT_NATIVE */
1542 stderror(ERR_NAME | ERR_JOBARGS);
1543 else if (kill(pid, signum) < 0) {
1544 xprintf("%d: %s\n", pid, strerror(errno));
1549 if (signum == SIGTERM || signum == SIGHUP)
1550 (void) kill(pid, SIGCONT);
1551 #endif /* BSDJOBS */
1556 cleanup_until(&pchild_disabled);
1558 stderror(ERR_SILENT);
1562 * pstart - start the job in foreground/background
1565 pstart(struct process *pp, int foregnd)
1569 /* We don't use jobflags in this function right now (see below) */
1570 /* long jobflags = 0; */
1573 cleanup_push(&pchild_disabled, disabled_cleanup);
1576 /* We don't use jobflags in this function right now (see below) */
1577 /* jobflags |= np->p_flags; */
1578 if (np->p_flags & (PRUNNING | PSTOPPED)) {
1579 np->p_flags |= PRUNNING;
1580 np->p_flags &= ~PSTOPPED;
1582 np->p_flags |= PFOREGND;
1584 np->p_flags &= ~PFOREGND;
1586 } while ((np = np->p_friends) != pp);
1589 (void) pprint(pp, foregnd ? NAME | JOBDIR : NUMBER | NAME | AMPERSAND);
1591 /* GrP run jobcmd hook if foregrounding */
1593 job_cmd(pp->p_command);
1598 rv = tcsetpgrp(FSHTTY, pp->p_jobid);
1601 * 1. child process of csh (shell script) receives SIGTTIN/SIGTTOU
1602 * 2. parent process (csh) receives SIGCHLD
1603 * 3. The "csh" signal handling function pchild() is invoked
1604 * with a SIGCHLD signal.
1605 * 4. pchild() calls wait3(WNOHANG) which returns 0.
1606 * The child process is NOT ready to be waited for at this time.
1607 * pchild() returns without picking-up the correct status
1608 * for the child process which generated the SIGCHLD.
1609 * 5. CONSEQUENCE : csh is UNaware that the process is stopped
1610 * 6. THIS LINE HAS BEEN COMMENTED OUT : if (jobflags&PSTOPPED)
1611 * (beto@aixwiz.austin.ibm.com - aug/03/91)
1612 * 7. I removed the line completely and added extra checks for
1613 * pstart, so that if a job gets attached to and dies inside
1614 * a debugger it does not confuse the shell. [christos]
1615 * 8. on the nec sx-4 there seems to be a problem, which requires
1616 * a syscall(151, getpid(), getpid()) in osinit. Don't ask me
1617 * what this is doing. [schott@rzg.mpg.de]
1621 rv = killpg(pp->p_jobid, SIGCONT);
1622 #endif /* BSDJOBS */
1623 cleanup_until(&pchild_disabled);
1628 panystop(int neednl)
1633 for (pp = proclist.p_next; pp; pp = pp->p_next)
1634 if (pp->p_flags & PSTOPPED)
1635 stderror(ERR_STOPPED, neednl ? "\n" : "");
1641 struct process *pp, *np;
1643 if (cp == 0 || cp[1] == 0 || eq(cp, STRcent2) || eq(cp, STRcentplus)) {
1644 if (pcurrent == NULL)
1645 stderror(ERR_NAME | ERR_JOBCUR);
1648 if (eq(cp, STRcentminus) || eq(cp, STRcenthash)) {
1649 if (pprevious == NULL)
1650 stderror(ERR_NAME | ERR_JOBPREV);
1653 if (Isdigit(cp[1])) {
1654 int idx = atoi(short2str(cp + 1));
1656 for (pp = proclist.p_next; pp; pp = pp->p_next)
1657 if (pp->p_index == idx && pp->p_procid == pp->p_jobid)
1659 stderror(ERR_NAME | ERR_NOSUCHJOB);
1662 for (pp = proclist.p_next; pp; pp = pp->p_next)
1663 if (pp->p_procid == pp->p_jobid) {
1667 for (dp = pp->p_command; *dp; dp++) {
1670 if (prefix(cp + 2, dp))
1674 else if (prefix(cp + 1, pp->p_command)) {
1677 stderror(ERR_NAME | ERR_AMBIG);
1683 stderror(ERR_NAME | (cp[1] == '?' ? ERR_JOBPAT : ERR_NOSUCHJOB));
1690 * pgetcurr - find most recent job that is not pp, preferably stopped
1692 static struct process *
1693 pgetcurr(struct process *pp)
1696 struct process *xp = NULL;
1698 for (np = proclist.p_next; np; np = np->p_next)
1699 if (np != pcurrent && np != pp && np->p_procid &&
1700 np->p_procid == np->p_jobid) {
1701 if (np->p_flags & PSTOPPED)
1710 * donotify - flag the job so as to report termination asynchronously
1714 donotify(Char **v, struct command *c)
1720 pp->p_flags |= PNOTIFY;
1725 synch_handler(int sno)
1729 #endif /* SIGSYNCH */
1732 * Do the fork and whatever should be done in the child side that
1733 * should not be done if we are not forking at all (like for simple builtin's)
1734 * Also do everything that needs any signals fiddled with in the parent side
1736 * Wanttty tells whether process and/or tty pgrps are to be manipulated:
1737 * -1: leave tty alone; inherit pgrp from parent
1738 * 0: already have tty; manipulate process pgrps only
1739 * 1: want to claim tty; manipulate process and tty pgrps
1740 * It is usually just the value of tpgrp.
1744 pfork(struct command *t, int wanttty)
1750 struct sigaction osa, nsa;
1751 #endif /* SIGSYNCH */
1754 * A child will be uninterruptible only under very special conditions.
1755 * Remember that the semantics of '&' is implemented by disconnecting the
1756 * process from the tty so signals do not need to ignored just for '&'.
1757 * Thus signals are set to default action for children unless: we have had
1758 * an "onintr -" (then specifically ignored) we are not playing with
1759 * signals (inherit action)
1762 ignint = (tpgrp == -1 && (t->t_dflg & F_NOINTERRUPT))
1763 || (gointr && eq(gointr, STRminus));
1766 * Check for maximum nesting of 16 processes to avoid Forking loops
1769 stderror(ERR_NESTING, 16);
1771 nsa.sa_handler = synch_handler;
1772 sigfillset(&nsa.sa_mask);
1773 nsa.sa_flags = SA_RESTART;
1774 if (sigaction(SIGSYNCH, &nsa, &osa))
1775 stderror(ERR_SYSTEM, "pfork: sigaction set", strerror(errno));
1776 #endif /* SIGSYNCH */
1778 * Hold pchild() until we have the process installed in our table.
1782 cleanup_push(&pchild_disabled, disabled_cleanup);
1784 while ((pid = fork()) == -1)
1786 (void) sleep(FORKSLEEP);
1788 stderror(ERR_NOPROC);
1790 (void)cleanup_push_mark(); /* Never to be popped */
1791 pchild_disabled = 0;
1793 pgrp = pcurrjob ? pcurrjob->p_jobid : getpid();
1796 #if !defined(BSDTIMES) && !defined(_SEQUENT_)
1798 #endif /* !defined(BSDTIMES) && !defined(_SEQUENT_) */
1801 setintr = 0; /* until I think otherwise */
1803 * Children just get blown away on SIGINT, SIGQUIT unless "onintr
1806 (void) signal(SIGINT, ignint ? SIG_IGN : SIG_DFL);
1807 (void) signal(SIGQUIT, ignint ? SIG_IGN : SIG_DFL);
1810 /* make stoppable */
1811 (void) signal(SIGTSTP, SIG_DFL);
1812 (void) signal(SIGTTIN, SIG_DFL);
1813 (void) signal(SIGTTOU, SIG_DFL);
1815 #endif /* BSDJOBS */
1816 sigaction(SIGTERM, &parterm, NULL);
1818 else if (tpgrp == -1 && (t->t_dflg & F_NOINTERRUPT)) {
1819 (void) signal(SIGINT, SIG_IGN);
1820 (void) signal(SIGQUIT, SIG_IGN);
1823 signal(SIGIO, SIG_IGN); /* ignore SIGIO in child too */
1826 pgetty(wanttty, pgrp);
1828 * Nohup and nice apply only to NODE_COMMAND's but it would be nice
1829 * (?!?) if you could say "nohup (foo;bar)" Then the parser would have
1830 * to know about nice/nohup/time
1832 if (t->t_dflg & F_NOHUP)
1833 (void) signal(SIGHUP, SIG_IGN);
1834 if (t->t_dflg & F_NICE) {
1835 int nval = SIGN_EXTEND_CHAR(t->t_nice);
1836 #ifdef HAVE_SETPRIORITY
1837 if (setpriority(PRIO_PROCESS, 0, nval) == -1 && errno)
1838 stderror(ERR_SYSTEM, "setpriority", strerror(errno));
1839 #else /* !HAVE_SETPRIORITY */
1841 #endif /* !HAVE_SETPRIORITY */
1844 if (t->t_dflg & F_VER) {
1845 tsetenv(STRSYSTYPE, t->t_systype ? STRbsd43 : STRsys53);
1850 /* rfw 8/89 now parent can continue */
1851 if (kill(getppid(), SIGSYNCH))
1852 stderror(ERR_SYSTEM, "pfork child: kill", strerror(errno));
1853 #endif /* SIGSYNCH */
1860 * `Walking' process group fix from Beto Appleton.
1861 * (beto@aixwiz.austin.ibm.com)
1862 * If setpgid fails at this point that means that
1863 * our process leader has died. We flush the current
1864 * job and become the process leader ourselves.
1865 * The parent will figure that out later.
1867 pgrp = pcurrjob ? pcurrjob->p_jobid : pid;
1868 if (setpgid(pid, pgrp) == -1 && errno == EPERM) {
1871 * We don't care if this causes an error here;
1872 * then we are already in the right process group
1874 (void) setpgid(pid, pgrp = pid);
1877 #endif /* POSIXJOBS */
1881 sigset_t pause_mask;
1884 * rfw 8/89 Wait for child to own terminal. Solves half of ugly
1885 * synchronization problem. With this change, we know that the only
1886 * reason setpgrp to a previous process in a pipeline can fail is that
1887 * the previous process has already exited. Without this hack, he may
1888 * either have exited or not yet started to run. Two uglies become
1891 sigprocmask(SIG_BLOCK, NULL, &pause);
1892 sigdelset(&pause_mask, SIGCHLD);
1893 sigdelset(&pause_mask, SIGSYNCH);
1894 sigsuspend(&pause_mask);
1895 (void)handle_pending_signals();
1896 if (sigaction(SIGSYNCH, &osa, NULL))
1897 stderror(ERR_SYSTEM, "pfork parent: sigaction restore",
1900 #endif /* SIGSYNCH */
1903 cleanup_until(&pchild_disabled);
1912 stderror(ERR_JOBCONTROL);
1914 stderror(ERR_JOBCTRLSUB);
1919 setttypgrp(int pgrp)
1922 * If we are piping out a builtin, eg. 'echo | more' things can go
1923 * out of sequence, i.e. the more can run before the echo. This
1924 * can happen even if we have vfork, since the echo will be forked
1925 * with the regular fork. In this case, we need to set the tty
1926 * pgrp ourselves. If that happens, then the process will be still
1927 * alive. And the tty process group will already be set.
1928 * This should fix the famous sequent problem as a side effect:
1929 * The controlling terminal is lost if all processes in the
1930 * terminal process group are zombies. In this case tcgetpgrp()
1931 * returns 0. If this happens we must set the terminal process
1934 if (tcgetpgrp(FSHTTY) != pgrp) {
1936 struct sigaction old;
1939 * tcsetpgrp will set SIGTTOU to all the the processes in
1940 * the background according to POSIX... We ignore this here.
1942 sigaction(SIGTTOU, NULL, &old);
1943 signal(SIGTTOU, SIG_IGN);
1945 (void) tcsetpgrp(FSHTTY, pgrp);
1947 sigaction(SIGTTOU, &old, NULL);
1955 * if we don't have vfork(), things can still go in the wrong order
1956 * resulting in the famous 'Stopped (tty output)'. But some systems
1957 * don't permit the setpgid() call, (these are more recent secure
1958 * systems such as ibm's aix), when they do. Then we'd rather print
1959 * an error message than hang the shell!
1960 * I am open to suggestions how to fix that.
1963 pgetty(int wanttty, pid_t pgrp)
1968 # endif /* POSIXJOBS */
1970 jobdebug_xprintf(("wanttty %d pid %d opgrp%d pgrp %d tpgrp %d\n",
1971 wanttty, (int)getpid(), (int)pgrp, (int)mygetpgrp(),
1972 (int)tcgetpgrp(FSHTTY)));
1975 * christos: I am blocking the tty signals till I've set things
1980 sigaddset(&set, SIGTSTP);
1981 sigaddset(&set, SIGTTIN);
1982 (void)sigprocmask(SIG_BLOCK, &set, &oset);
1983 cleanup_push(&oset, sigprocmask_cleanup);
1985 # endif /* POSIXJOBS */
1990 # endif /* !POSIXJOBS */
1993 * From: Michael Schroeder <mlschroe@immd4.informatik.uni-erlangen.de>
1994 * Don't check for tpgrp >= 0 so even non-interactive shells give
1995 * background jobs process groups Same for the comparison in the other part
1999 if (setpgid(0, pgrp) == -1) {
2001 /* Walking process group fix; see above */
2002 if (setpgid(0, pgrp = getpid()) == -1) {
2003 # endif /* POSIXJOBS */
2004 stderror(ERR_SYSTEM, "setpgid child:\n", strerror(errno));
2008 wanttty = pgrp; /* Now we really want the tty, since we became the
2009 * the process group leader
2011 # endif /* POSIXJOBS */
2018 cleanup_until(&oset);
2020 # endif /* POSIXJOBS */
2022 jobdebug_xprintf(("wanttty %d pid %d pgrp %d tpgrp %d\n",
2023 wanttty, getpid(), mygetpgrp(), tcgetpgrp(FSHTTY)));
2026 tpgrp = 0; /* gave tty away */
2027 #endif /* BSDJOBS */