1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
1359 lines
31 KiB
C
1359 lines
31 KiB
C
/*-
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* Copyright (c) 1980, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef lint
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static char sccsid[] = "@(#)proc.c 8.1 (Berkeley) 5/31/93";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#if __STDC__
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# include <stdarg.h>
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#else
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# include <varargs.h>
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#endif
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#include "csh.h"
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#include "dir.h"
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#include "proc.h"
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#include "extern.h"
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#define BIGINDEX 9 /* largest desirable job index */
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static struct rusage zru;
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static void pflushall __P((void));
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static void pflush __P((struct process *));
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static void pclrcurr __P((struct process *));
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static void padd __P((struct command *));
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static int pprint __P((struct process *, int));
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static void ptprint __P((struct process *));
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static void pads __P((Char *));
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static void pkill __P((Char **v, int));
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static struct process
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*pgetcurr __P((struct process *));
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static void okpcntl __P((void));
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/*
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* pchild - called at interrupt level by the SIGCHLD signal
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* indicating that at least one child has terminated or stopped
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* thus at least one wait system call will definitely return a
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* childs status. Top level routines (like pwait) must be sure
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* to mask interrupts when playing with the proclist data structures!
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*/
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/* ARGUSED */
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void
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pchild(notused)
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int notused;
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{
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register struct process *pp;
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register struct process *fp;
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register int pid;
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extern int insource;
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union wait w;
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int jobflags;
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struct rusage ru;
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loop:
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errno = 0; /* reset, just in case */
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pid = wait3(&w.w_status,
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(setintr && (intty || insource) ? WNOHANG | WUNTRACED : WNOHANG), &ru);
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if (pid <= 0) {
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if (errno == EINTR) {
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errno = 0;
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goto loop;
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}
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pnoprocesses = pid == -1;
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return;
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}
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for (pp = proclist.p_next; pp != NULL; pp = pp->p_next)
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if (pid == pp->p_pid)
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goto found;
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goto loop;
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found:
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if (pid == atoi(short2str(value(STRchild))))
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unsetv(STRchild);
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pp->p_flags &= ~(PRUNNING | PSTOPPED | PREPORTED);
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if (WIFSTOPPED(w)) {
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pp->p_flags |= PSTOPPED;
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pp->p_reason = w.w_stopsig;
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}
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else {
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if (pp->p_flags & (PTIME | PPTIME) || adrof(STRtime))
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(void) gettimeofday(&pp->p_etime, NULL);
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pp->p_rusage = ru;
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if (WIFSIGNALED(w)) {
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if (w.w_termsig == SIGINT)
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pp->p_flags |= PINTERRUPTED;
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else
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pp->p_flags |= PSIGNALED;
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if (w.w_coredump)
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pp->p_flags |= PDUMPED;
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pp->p_reason = w.w_termsig;
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}
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else {
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pp->p_reason = w.w_retcode;
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if (pp->p_reason != 0)
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pp->p_flags |= PAEXITED;
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else
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pp->p_flags |= PNEXITED;
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}
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}
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jobflags = 0;
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fp = pp;
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do {
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if ((fp->p_flags & (PPTIME | PRUNNING | PSTOPPED)) == 0 &&
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!child && adrof(STRtime) &&
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fp->p_rusage.ru_utime.tv_sec + fp->p_rusage.ru_stime.tv_sec
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>= atoi(short2str(value(STRtime))))
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fp->p_flags |= PTIME;
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jobflags |= fp->p_flags;
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} while ((fp = fp->p_friends) != pp);
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pp->p_flags &= ~PFOREGND;
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if (pp == pp->p_friends && (pp->p_flags & PPTIME)) {
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pp->p_flags &= ~PPTIME;
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pp->p_flags |= PTIME;
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}
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if ((jobflags & (PRUNNING | PREPORTED)) == 0) {
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fp = pp;
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do {
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if (fp->p_flags & PSTOPPED)
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fp->p_flags |= PREPORTED;
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} while ((fp = fp->p_friends) != pp);
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while (fp->p_pid != fp->p_jobid)
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fp = fp->p_friends;
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if (jobflags & PSTOPPED) {
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if (pcurrent && pcurrent != fp)
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pprevious = pcurrent;
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pcurrent = fp;
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}
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else
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pclrcurr(fp);
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if (jobflags & PFOREGND) {
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if (jobflags & (PSIGNALED | PSTOPPED | PPTIME) ||
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#ifdef IIASA
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jobflags & PAEXITED ||
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#endif
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!eq(dcwd->di_name, fp->p_cwd->di_name)) {
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; /* print in pjwait */
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}
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/* PWP: print a newline after ^C */
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else if (jobflags & PINTERRUPTED) {
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(void) vis_fputc('\r' | QUOTE, cshout);
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(void) fputc('\n', cshout);
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}
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}
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else {
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if (jobflags & PNOTIFY || adrof(STRnotify)) {
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(void) vis_fputc('\r' | QUOTE, cshout);
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(void) fputc('\n', cshout);
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(void) pprint(pp, NUMBER | NAME | REASON);
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if ((jobflags & PSTOPPED) == 0)
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pflush(pp);
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}
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else {
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fp->p_flags |= PNEEDNOTE;
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neednote++;
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}
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}
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}
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goto loop;
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}
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void
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pnote()
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{
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register struct process *pp;
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int flags;
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sigset_t omask;
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neednote = 0;
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for (pp = proclist.p_next; pp != NULL; pp = pp->p_next) {
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if (pp->p_flags & PNEEDNOTE) {
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omask = sigblock(sigmask(SIGCHLD));
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pp->p_flags &= ~PNEEDNOTE;
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flags = pprint(pp, NUMBER | NAME | REASON);
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if ((flags & (PRUNNING | PSTOPPED)) == 0)
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pflush(pp);
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(void) sigsetmask(omask);
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}
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}
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}
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/*
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* pwait - wait for current job to terminate, maintaining integrity
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* of current and previous job indicators.
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*/
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void
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pwait()
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{
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register struct process *fp, *pp;
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sigset_t omask;
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/*
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* Here's where dead procs get flushed.
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*/
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omask = sigblock(sigmask(SIGCHLD));
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for (pp = (fp = &proclist)->p_next; pp != NULL; pp = (fp = pp)->p_next)
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if (pp->p_pid == 0) {
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fp->p_next = pp->p_next;
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xfree((ptr_t) pp->p_command);
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if (pp->p_cwd && --pp->p_cwd->di_count == 0)
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if (pp->p_cwd->di_next == 0)
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dfree(pp->p_cwd);
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xfree((ptr_t) pp);
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pp = fp;
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}
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(void) sigsetmask(omask);
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pjwait(pcurrjob);
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}
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/*
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* pjwait - wait for a job to finish or become stopped
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* It is assumed to be in the foreground state (PFOREGND)
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*/
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void
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pjwait(pp)
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register struct process *pp;
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{
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register struct process *fp;
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int jobflags, reason;
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sigset_t omask;
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while (pp->p_pid != pp->p_jobid)
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pp = pp->p_friends;
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fp = pp;
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do {
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if ((fp->p_flags & (PFOREGND | PRUNNING)) == PRUNNING)
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(void) fprintf(csherr, "BUG: waiting for background job!\n");
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} while ((fp = fp->p_friends) != pp);
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/*
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* Now keep pausing as long as we are not interrupted (SIGINT), and the
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* target process, or any of its friends, are running
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*/
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fp = pp;
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omask = sigblock(sigmask(SIGCHLD));
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for (;;) {
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(void) sigblock(sigmask(SIGCHLD));
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jobflags = 0;
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do
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jobflags |= fp->p_flags;
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while ((fp = (fp->p_friends)) != pp);
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if ((jobflags & PRUNNING) == 0)
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break;
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#ifdef JOBDEBUG
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(void) fprintf(csherr, "starting to sigpause for SIGCHLD on %d\n",
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fp->p_pid);
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#endif /* JOBDEBUG */
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(void) sigpause(omask & ~sigmask(SIGCHLD));
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}
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(void) sigsetmask(omask);
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if (tpgrp > 0) /* get tty back */
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(void) tcsetpgrp(FSHTTY, tpgrp);
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if ((jobflags & (PSIGNALED | PSTOPPED | PTIME)) ||
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!eq(dcwd->di_name, fp->p_cwd->di_name)) {
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if (jobflags & PSTOPPED) {
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(void) fputc('\n', cshout);
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if (adrof(STRlistjobs)) {
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Char *jobcommand[3];
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jobcommand[0] = STRjobs;
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if (eq(value(STRlistjobs), STRlong))
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jobcommand[1] = STRml;
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else
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jobcommand[1] = NULL;
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jobcommand[2] = NULL;
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dojobs(jobcommand, NULL);
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(void) pprint(pp, SHELLDIR);
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}
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else
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(void) pprint(pp, AREASON | SHELLDIR);
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}
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else
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(void) pprint(pp, AREASON | SHELLDIR);
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}
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if ((jobflags & (PINTERRUPTED | PSTOPPED)) && setintr &&
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(!gointr || !eq(gointr, STRminus))) {
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if ((jobflags & PSTOPPED) == 0)
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pflush(pp);
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pintr1(0);
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/* NOTREACHED */
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}
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reason = 0;
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fp = pp;
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do {
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if (fp->p_reason)
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reason = fp->p_flags & (PSIGNALED | PINTERRUPTED) ?
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fp->p_reason | META : fp->p_reason;
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} while ((fp = fp->p_friends) != pp);
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if ((reason != 0) && (adrof(STRprintexitvalue))) {
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(void) fprintf(cshout, "Exit %d\n", reason);
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}
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set(STRstatus, putn(reason));
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if (reason && exiterr)
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exitstat();
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pflush(pp);
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}
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/*
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* dowait - wait for all processes to finish
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*/
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void
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/*ARGSUSED*/
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dowait(v, t)
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Char **v;
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struct command *t;
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{
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register struct process *pp;
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sigset_t omask;
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pjobs++;
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omask = sigblock(sigmask(SIGCHLD));
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loop:
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for (pp = proclist.p_next; pp; pp = pp->p_next)
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if (pp->p_pid && /* pp->p_pid == pp->p_jobid && */
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pp->p_flags & PRUNNING) {
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(void) sigpause((sigset_t) 0);
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goto loop;
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}
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(void) sigsetmask(omask);
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pjobs = 0;
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}
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/*
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* pflushall - flush all jobs from list (e.g. at fork())
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*/
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static void
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pflushall()
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{
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register struct process *pp;
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for (pp = proclist.p_next; pp != NULL; pp = pp->p_next)
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if (pp->p_pid)
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pflush(pp);
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}
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/*
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* pflush - flag all process structures in the same job as the
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* the argument process for deletion. The actual free of the
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* space is not done here since pflush is called at interrupt level.
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*/
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static void
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pflush(pp)
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register struct process *pp;
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{
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register struct process *np;
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register int idx;
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|
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if (pp->p_pid == 0) {
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(void) fprintf(csherr, "BUG: process flushed twice");
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return;
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}
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while (pp->p_pid != pp->p_jobid)
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pp = pp->p_friends;
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pclrcurr(pp);
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if (pp == pcurrjob)
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pcurrjob = 0;
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idx = pp->p_index;
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np = pp;
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do {
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np->p_index = np->p_pid = 0;
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np->p_flags &= ~PNEEDNOTE;
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} while ((np = np->p_friends) != pp);
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if (idx == pmaxindex) {
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for (np = proclist.p_next, idx = 0; np; np = np->p_next)
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if (np->p_index > idx)
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idx = np->p_index;
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pmaxindex = idx;
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}
|
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}
|
|
|
|
/*
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* pclrcurr - make sure the given job is not the current or previous job;
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* pp MUST be the job leader
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*/
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static void
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|
pclrcurr(pp)
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register struct process *pp;
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|
{
|
|
|
|
if (pp == pcurrent)
|
|
if (pprevious != NULL) {
|
|
pcurrent = pprevious;
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|
pprevious = pgetcurr(pp);
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|
}
|
|
else {
|
|
pcurrent = pgetcurr(pp);
|
|
pprevious = pgetcurr(pp);
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|
}
|
|
else if (pp == pprevious)
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|
pprevious = pgetcurr(pp);
|
|
}
|
|
|
|
/* +4 here is 1 for '\0', 1 ea for << >& >> */
|
|
static Char command[PMAXLEN + 4];
|
|
static int cmdlen;
|
|
static Char *cmdp;
|
|
|
|
/*
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|
* palloc - allocate a process structure and fill it up.
|
|
* an important assumption is made that the process is running.
|
|
*/
|
|
void
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|
palloc(pid, t)
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|
int pid;
|
|
register struct command *t;
|
|
{
|
|
register struct process *pp;
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|
int i;
|
|
|
|
pp = (struct process *) xcalloc(1, (size_t) sizeof(struct process));
|
|
pp->p_pid = pid;
|
|
pp->p_flags = t->t_dflg & F_AMPERSAND ? PRUNNING : PRUNNING | PFOREGND;
|
|
if (t->t_dflg & F_TIME)
|
|
pp->p_flags |= PPTIME;
|
|
cmdp = command;
|
|
cmdlen = 0;
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|
padd(t);
|
|
*cmdp++ = 0;
|
|
if (t->t_dflg & F_PIPEOUT) {
|
|
pp->p_flags |= PPOU;
|
|
if (t->t_dflg & F_STDERR)
|
|
pp->p_flags |= PERR;
|
|
}
|
|
pp->p_command = Strsave(command);
|
|
if (pcurrjob) {
|
|
struct process *fp;
|
|
|
|
/* careful here with interrupt level */
|
|
pp->p_cwd = 0;
|
|
pp->p_index = pcurrjob->p_index;
|
|
pp->p_friends = pcurrjob;
|
|
pp->p_jobid = pcurrjob->p_pid;
|
|
for (fp = pcurrjob; fp->p_friends != pcurrjob; fp = fp->p_friends)
|
|
continue;
|
|
fp->p_friends = pp;
|
|
}
|
|
else {
|
|
pcurrjob = pp;
|
|
pp->p_jobid = pid;
|
|
pp->p_friends = pp;
|
|
pp->p_cwd = dcwd;
|
|
dcwd->di_count++;
|
|
if (pmaxindex < BIGINDEX)
|
|
pp->p_index = ++pmaxindex;
|
|
else {
|
|
struct process *np;
|
|
|
|
for (i = 1;; i++) {
|
|
for (np = proclist.p_next; np; np = np->p_next)
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|
if (np->p_index == i)
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|
goto tryagain;
|
|
pp->p_index = i;
|
|
if (i > pmaxindex)
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|
pmaxindex = i;
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|
break;
|
|
tryagain:;
|
|
}
|
|
}
|
|
if (pcurrent == NULL)
|
|
pcurrent = pp;
|
|
else if (pprevious == NULL)
|
|
pprevious = pp;
|
|
}
|
|
pp->p_next = proclist.p_next;
|
|
proclist.p_next = pp;
|
|
(void) gettimeofday(&pp->p_btime, NULL);
|
|
}
|
|
|
|
static void
|
|
padd(t)
|
|
register struct command *t;
|
|
{
|
|
Char **argp;
|
|
|
|
if (t == 0)
|
|
return;
|
|
switch (t->t_dtyp) {
|
|
|
|
case NODE_PAREN:
|
|
pads(STRLparensp);
|
|
padd(t->t_dspr);
|
|
pads(STRspRparen);
|
|
break;
|
|
|
|
case NODE_COMMAND:
|
|
for (argp = t->t_dcom; *argp; argp++) {
|
|
pads(*argp);
|
|
if (argp[1])
|
|
pads(STRspace);
|
|
}
|
|
break;
|
|
|
|
case NODE_OR:
|
|
case NODE_AND:
|
|
case NODE_PIPE:
|
|
case NODE_LIST:
|
|
padd(t->t_dcar);
|
|
switch (t->t_dtyp) {
|
|
case NODE_OR:
|
|
pads(STRspor2sp);
|
|
break;
|
|
case NODE_AND:
|
|
pads(STRspand2sp);
|
|
break;
|
|
case NODE_PIPE:
|
|
pads(STRsporsp);
|
|
break;
|
|
case NODE_LIST:
|
|
pads(STRsemisp);
|
|
break;
|
|
}
|
|
padd(t->t_dcdr);
|
|
return;
|
|
}
|
|
if ((t->t_dflg & F_PIPEIN) == 0 && t->t_dlef) {
|
|
pads((t->t_dflg & F_READ) ? STRspLarrow2sp : STRspLarrowsp);
|
|
pads(t->t_dlef);
|
|
}
|
|
if ((t->t_dflg & F_PIPEOUT) == 0 && t->t_drit) {
|
|
pads((t->t_dflg & F_APPEND) ? STRspRarrow2 : STRspRarrow);
|
|
if (t->t_dflg & F_STDERR)
|
|
pads(STRand);
|
|
pads(STRspace);
|
|
pads(t->t_drit);
|
|
}
|
|
}
|
|
|
|
static void
|
|
pads(cp)
|
|
Char *cp;
|
|
{
|
|
register int i;
|
|
|
|
/*
|
|
* Avoid the Quoted Space alias hack! Reported by:
|
|
* sam@john-bigboote.ICS.UCI.EDU (Sam Horrocks)
|
|
*/
|
|
if (cp[0] == STRQNULL[0])
|
|
cp++;
|
|
|
|
i = Strlen(cp);
|
|
|
|
if (cmdlen >= PMAXLEN)
|
|
return;
|
|
if (cmdlen + i >= PMAXLEN) {
|
|
(void) Strcpy(cmdp, STRsp3dots);
|
|
cmdlen = PMAXLEN;
|
|
cmdp += 4;
|
|
return;
|
|
}
|
|
(void) Strcpy(cmdp, cp);
|
|
cmdp += i;
|
|
cmdlen += i;
|
|
}
|
|
|
|
/*
|
|
* psavejob - temporarily save the current job on a one level stack
|
|
* so another job can be created. Used for { } in exp6
|
|
* and `` in globbing.
|
|
*/
|
|
void
|
|
psavejob()
|
|
{
|
|
|
|
pholdjob = pcurrjob;
|
|
pcurrjob = NULL;
|
|
}
|
|
|
|
/*
|
|
* prestjob - opposite of psavejob. This may be missed if we are interrupted
|
|
* somewhere, but pendjob cleans up anyway.
|
|
*/
|
|
void
|
|
prestjob()
|
|
{
|
|
|
|
pcurrjob = pholdjob;
|
|
pholdjob = NULL;
|
|
}
|
|
|
|
/*
|
|
* pendjob - indicate that a job (set of commands) has been completed
|
|
* or is about to begin.
|
|
*/
|
|
void
|
|
pendjob()
|
|
{
|
|
register struct process *pp, *tp;
|
|
|
|
if (pcurrjob && (pcurrjob->p_flags & (PFOREGND | PSTOPPED)) == 0) {
|
|
pp = pcurrjob;
|
|
while (pp->p_pid != pp->p_jobid)
|
|
pp = pp->p_friends;
|
|
(void) fprintf(cshout, "[%d]", pp->p_index);
|
|
tp = pp;
|
|
do {
|
|
(void) fprintf(cshout, " %d", pp->p_pid);
|
|
pp = pp->p_friends;
|
|
} while (pp != tp);
|
|
(void) fputc('\n', cshout);
|
|
}
|
|
pholdjob = pcurrjob = 0;
|
|
}
|
|
|
|
/*
|
|
* pprint - print a job
|
|
*/
|
|
static int
|
|
pprint(pp, flag)
|
|
register struct process *pp;
|
|
bool flag;
|
|
{
|
|
register status, reason;
|
|
struct process *tp;
|
|
int jobflags, pstatus;
|
|
bool hadnl = 1; /* did we just have a newline */
|
|
char *format;
|
|
|
|
(void) fpurge(cshout);
|
|
|
|
while (pp->p_pid != pp->p_jobid)
|
|
pp = pp->p_friends;
|
|
if (pp == pp->p_friends && (pp->p_flags & PPTIME)) {
|
|
pp->p_flags &= ~PPTIME;
|
|
pp->p_flags |= PTIME;
|
|
}
|
|
tp = pp;
|
|
status = reason = -1;
|
|
jobflags = 0;
|
|
do {
|
|
jobflags |= pp->p_flags;
|
|
pstatus = pp->p_flags & PALLSTATES;
|
|
if (tp != pp && !hadnl && !(flag & FANCY) &&
|
|
((pstatus == status && pp->p_reason == reason) ||
|
|
!(flag & REASON))) {
|
|
(void) fputc(' ', cshout);
|
|
hadnl = 0;
|
|
}
|
|
else {
|
|
if (tp != pp && !hadnl) {
|
|
(void) fputc('\n', cshout);
|
|
hadnl = 1;
|
|
}
|
|
if (flag & NUMBER) {
|
|
if (pp == tp)
|
|
(void) fprintf(cshout, "[%d]%s %c ", pp->p_index,
|
|
pp->p_index < 10 ? " " : "",
|
|
pp == pcurrent ? '+' :
|
|
(pp == pprevious ? '-' : ' '));
|
|
else
|
|
(void) fprintf(cshout, " ");
|
|
hadnl = 0;
|
|
}
|
|
if (flag & FANCY) {
|
|
(void) fprintf(cshout, "%5d ", pp->p_pid);
|
|
hadnl = 0;
|
|
}
|
|
if (flag & (REASON | AREASON)) {
|
|
if (flag & NAME)
|
|
format = "%-23s";
|
|
else
|
|
format = "%s";
|
|
if (pstatus == status)
|
|
if (pp->p_reason == reason) {
|
|
(void) fprintf(cshout, format, "");
|
|
hadnl = 0;
|
|
goto prcomd;
|
|
}
|
|
else
|
|
reason = pp->p_reason;
|
|
else {
|
|
status = pstatus;
|
|
reason = pp->p_reason;
|
|
}
|
|
switch (status) {
|
|
|
|
case PRUNNING:
|
|
(void) fprintf(cshout, format, "Running ");
|
|
hadnl = 0;
|
|
break;
|
|
|
|
case PINTERRUPTED:
|
|
case PSTOPPED:
|
|
case PSIGNALED:
|
|
/*
|
|
* tell what happened to the background job
|
|
* From: Michael Schroeder
|
|
* <mlschroe@immd4.informatik.uni-erlangen.de>
|
|
*/
|
|
if ((flag & REASON)
|
|
|| ((flag & AREASON)
|
|
&& reason != SIGINT
|
|
&& (reason != SIGPIPE
|
|
|| (pp->p_flags & PPOU) == 0))) {
|
|
(void) fprintf(cshout, format,
|
|
sys_siglist[(unsigned char)
|
|
pp->p_reason]);
|
|
hadnl = 0;
|
|
}
|
|
break;
|
|
|
|
case PNEXITED:
|
|
case PAEXITED:
|
|
if (flag & REASON) {
|
|
if (pp->p_reason)
|
|
(void) fprintf(cshout, "Exit %-18d", pp->p_reason);
|
|
else
|
|
(void) fprintf(cshout, format, "Done");
|
|
hadnl = 0;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
(void) fprintf(csherr, "BUG: status=%-9o", status);
|
|
}
|
|
}
|
|
}
|
|
prcomd:
|
|
if (flag & NAME) {
|
|
(void) fprintf(cshout, "%s", vis_str(pp->p_command));
|
|
if (pp->p_flags & PPOU)
|
|
(void) fprintf(cshout, " |");
|
|
if (pp->p_flags & PERR)
|
|
(void) fputc('&', cshout);
|
|
hadnl = 0;
|
|
}
|
|
if (flag & (REASON | AREASON) && pp->p_flags & PDUMPED) {
|
|
(void) fprintf(cshout, " (core dumped)");
|
|
hadnl = 0;
|
|
}
|
|
if (tp == pp->p_friends) {
|
|
if (flag & AMPERSAND) {
|
|
(void) fprintf(cshout, " &");
|
|
hadnl = 0;
|
|
}
|
|
if (flag & JOBDIR &&
|
|
!eq(tp->p_cwd->di_name, dcwd->di_name)) {
|
|
(void) fprintf(cshout, " (wd: ");
|
|
dtildepr(value(STRhome), tp->p_cwd->di_name);
|
|
(void) fputc(')', cshout);
|
|
hadnl = 0;
|
|
}
|
|
}
|
|
if (pp->p_flags & PPTIME && !(status & (PSTOPPED | PRUNNING))) {
|
|
if (!hadnl)
|
|
(void) fprintf(cshout, "\n\t");
|
|
prusage(&zru, &pp->p_rusage, &pp->p_etime,
|
|
&pp->p_btime);
|
|
hadnl = 1;
|
|
}
|
|
if (tp == pp->p_friends) {
|
|
if (!hadnl) {
|
|
(void) fputc('\n', cshout);
|
|
hadnl = 1;
|
|
}
|
|
if (flag & SHELLDIR && !eq(tp->p_cwd->di_name, dcwd->di_name)) {
|
|
(void) fprintf(cshout, "(wd now: ");
|
|
dtildepr(value(STRhome), dcwd->di_name);
|
|
(void) fprintf(cshout, ")\n");
|
|
hadnl = 1;
|
|
}
|
|
}
|
|
} while ((pp = pp->p_friends) != tp);
|
|
if (jobflags & PTIME && (jobflags & (PSTOPPED | PRUNNING)) == 0) {
|
|
if (jobflags & NUMBER)
|
|
(void) fprintf(cshout, " ");
|
|
ptprint(tp);
|
|
hadnl = 1;
|
|
}
|
|
(void) fflush(cshout);
|
|
return (jobflags);
|
|
}
|
|
|
|
static void
|
|
ptprint(tp)
|
|
register struct process *tp;
|
|
{
|
|
struct timeval tetime, diff;
|
|
static struct timeval ztime;
|
|
struct rusage ru;
|
|
static struct rusage zru;
|
|
register struct process *pp = tp;
|
|
|
|
ru = zru;
|
|
tetime = ztime;
|
|
do {
|
|
ruadd(&ru, &pp->p_rusage);
|
|
tvsub(&diff, &pp->p_etime, &pp->p_btime);
|
|
if (timercmp(&diff, &tetime, >))
|
|
tetime = diff;
|
|
} while ((pp = pp->p_friends) != tp);
|
|
prusage(&zru, &ru, &tetime, &ztime);
|
|
}
|
|
|
|
/*
|
|
* dojobs - print all jobs
|
|
*/
|
|
void
|
|
/*ARGSUSED*/
|
|
dojobs(v, t)
|
|
Char **v;
|
|
struct command *t;
|
|
{
|
|
register struct process *pp;
|
|
register int flag = NUMBER | NAME | REASON;
|
|
int i;
|
|
|
|
if (chkstop)
|
|
chkstop = 2;
|
|
if (*++v) {
|
|
if (v[1] || !eq(*v, STRml))
|
|
stderror(ERR_JOBS);
|
|
flag |= FANCY | JOBDIR;
|
|
}
|
|
for (i = 1; i <= pmaxindex; i++)
|
|
for (pp = proclist.p_next; pp; pp = pp->p_next)
|
|
if (pp->p_index == i && pp->p_pid == pp->p_jobid) {
|
|
pp->p_flags &= ~PNEEDNOTE;
|
|
if (!(pprint(pp, flag) & (PRUNNING | PSTOPPED)))
|
|
pflush(pp);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* dofg - builtin - put the job into the foreground
|
|
*/
|
|
void
|
|
/*ARGSUSED*/
|
|
dofg(v, t)
|
|
Char **v;
|
|
struct command *t;
|
|
{
|
|
register struct process *pp;
|
|
|
|
okpcntl();
|
|
++v;
|
|
do {
|
|
pp = pfind(*v);
|
|
pstart(pp, 1);
|
|
pjwait(pp);
|
|
} while (*v && *++v);
|
|
}
|
|
|
|
/*
|
|
* %... - builtin - put the job into the foreground
|
|
*/
|
|
void
|
|
/*ARGSUSED*/
|
|
dofg1(v, t)
|
|
Char **v;
|
|
struct command *t;
|
|
{
|
|
register struct process *pp;
|
|
|
|
okpcntl();
|
|
pp = pfind(v[0]);
|
|
pstart(pp, 1);
|
|
pjwait(pp);
|
|
}
|
|
|
|
/*
|
|
* dobg - builtin - put the job into the background
|
|
*/
|
|
void
|
|
/*ARGSUSED*/
|
|
dobg(v, t)
|
|
Char **v;
|
|
struct command *t;
|
|
{
|
|
register struct process *pp;
|
|
|
|
okpcntl();
|
|
++v;
|
|
do {
|
|
pp = pfind(*v);
|
|
pstart(pp, 0);
|
|
} while (*v && *++v);
|
|
}
|
|
|
|
/*
|
|
* %... & - builtin - put the job into the background
|
|
*/
|
|
void
|
|
/*ARGSUSED*/
|
|
dobg1(v, t)
|
|
Char **v;
|
|
struct command *t;
|
|
{
|
|
register struct process *pp;
|
|
|
|
pp = pfind(v[0]);
|
|
pstart(pp, 0);
|
|
}
|
|
|
|
/*
|
|
* dostop - builtin - stop the job
|
|
*/
|
|
void
|
|
/*ARGSUSED*/
|
|
dostop(v, t)
|
|
Char **v;
|
|
struct command *t;
|
|
{
|
|
pkill(++v, SIGSTOP);
|
|
}
|
|
|
|
/*
|
|
* dokill - builtin - superset of kill (1)
|
|
*/
|
|
void
|
|
/*ARGSUSED*/
|
|
dokill(v, t)
|
|
Char **v;
|
|
struct command *t;
|
|
{
|
|
register int signum = SIGTERM;
|
|
register char *name;
|
|
|
|
v++;
|
|
if (v[0] && v[0][0] == '-') {
|
|
if (v[0][1] == 'l') {
|
|
for (signum = 1; signum < NSIG; signum++) {
|
|
(void) fprintf(cshout, "%s ", sys_signame[signum]);
|
|
if (signum == NSIG / 2)
|
|
(void) fputc('\n', cshout);
|
|
}
|
|
(void) fputc('\n', cshout);
|
|
return;
|
|
}
|
|
if (Isdigit(v[0][1])) {
|
|
signum = atoi(short2str(v[0] + 1));
|
|
if (signum < 0 || signum > NSIG)
|
|
stderror(ERR_NAME | ERR_BADSIG);
|
|
}
|
|
else {
|
|
name = short2str(&v[0][1]);
|
|
if (!strncasecmp(name, "sig", 3))
|
|
name += 3;
|
|
|
|
for (signum = 1; signum < NSIG; signum++)
|
|
if (!strcasecmp(sys_signame[signum], name))
|
|
break;
|
|
|
|
if (signum == NSIG) {
|
|
setname(vis_str(&v[0][1]));
|
|
stderror(ERR_NAME | ERR_UNKSIG);
|
|
}
|
|
}
|
|
v++;
|
|
}
|
|
pkill(v, signum);
|
|
}
|
|
|
|
static void
|
|
pkill(v, signum)
|
|
Char **v;
|
|
int signum;
|
|
{
|
|
register struct process *pp, *np;
|
|
register int jobflags = 0;
|
|
int pid, err1 = 0;
|
|
sigset_t omask;
|
|
Char *cp;
|
|
|
|
omask = sigmask(SIGCHLD);
|
|
if (setintr)
|
|
omask |= sigmask(SIGINT);
|
|
omask = sigblock(omask) & ~omask;
|
|
gflag = 0, tglob(v);
|
|
if (gflag) {
|
|
v = globall(v);
|
|
if (v == 0)
|
|
stderror(ERR_NAME | ERR_NOMATCH);
|
|
}
|
|
else {
|
|
v = gargv = saveblk(v);
|
|
trim(v);
|
|
}
|
|
|
|
while (v && (cp = *v)) {
|
|
if (*cp == '%') {
|
|
np = pp = pfind(cp);
|
|
do
|
|
jobflags |= np->p_flags;
|
|
while ((np = np->p_friends) != pp);
|
|
switch (signum) {
|
|
|
|
case SIGSTOP:
|
|
case SIGTSTP:
|
|
case SIGTTIN:
|
|
case SIGTTOU:
|
|
if ((jobflags & PRUNNING) == 0) {
|
|
(void) fprintf(csherr, "%s: Already suspended\n",
|
|
vis_str(cp));
|
|
err1++;
|
|
goto cont;
|
|
}
|
|
break;
|
|
/*
|
|
* suspend a process, kill -CONT %, then type jobs; the shell
|
|
* says it is suspended, but it is running; thanks jaap..
|
|
*/
|
|
case SIGCONT:
|
|
pstart(pp, 0);
|
|
goto cont;
|
|
}
|
|
if (killpg((pid_t) pp->p_jobid, signum) < 0) {
|
|
(void) fprintf(csherr, "%s: %s\n", vis_str(cp),
|
|
strerror(errno));
|
|
err1++;
|
|
}
|
|
if (signum == SIGTERM || signum == SIGHUP)
|
|
(void) killpg((pid_t) pp->p_jobid, SIGCONT);
|
|
}
|
|
else if (!(Isdigit(*cp) || *cp == '-'))
|
|
stderror(ERR_NAME | ERR_JOBARGS);
|
|
else {
|
|
pid = atoi(short2str(cp));
|
|
if (kill((pid_t) pid, signum) < 0) {
|
|
(void) fprintf(csherr, "%d: %s\n", pid, strerror(errno));
|
|
err1++;
|
|
goto cont;
|
|
}
|
|
if (signum == SIGTERM || signum == SIGHUP)
|
|
(void) kill((pid_t) pid, SIGCONT);
|
|
}
|
|
cont:
|
|
v++;
|
|
}
|
|
if (gargv)
|
|
blkfree(gargv), gargv = 0;
|
|
(void) sigsetmask(omask);
|
|
if (err1)
|
|
stderror(ERR_SILENT);
|
|
}
|
|
|
|
/*
|
|
* pstart - start the job in foreground/background
|
|
*/
|
|
void
|
|
pstart(pp, foregnd)
|
|
register struct process *pp;
|
|
int foregnd;
|
|
{
|
|
register struct process *np;
|
|
sigset_t omask;
|
|
long jobflags = 0;
|
|
|
|
omask = sigblock(sigmask(SIGCHLD));
|
|
np = pp;
|
|
do {
|
|
jobflags |= np->p_flags;
|
|
if (np->p_flags & (PRUNNING | PSTOPPED)) {
|
|
np->p_flags |= PRUNNING;
|
|
np->p_flags &= ~PSTOPPED;
|
|
if (foregnd)
|
|
np->p_flags |= PFOREGND;
|
|
else
|
|
np->p_flags &= ~PFOREGND;
|
|
}
|
|
} while ((np = np->p_friends) != pp);
|
|
if (!foregnd)
|
|
pclrcurr(pp);
|
|
(void) pprint(pp, foregnd ? NAME | JOBDIR : NUMBER | NAME | AMPERSAND);
|
|
if (foregnd)
|
|
(void) tcsetpgrp(FSHTTY, pp->p_jobid);
|
|
if (jobflags & PSTOPPED)
|
|
(void) killpg((pid_t) pp->p_jobid, SIGCONT);
|
|
(void) sigsetmask(omask);
|
|
}
|
|
|
|
void
|
|
panystop(neednl)
|
|
bool neednl;
|
|
{
|
|
register struct process *pp;
|
|
|
|
chkstop = 2;
|
|
for (pp = proclist.p_next; pp; pp = pp->p_next)
|
|
if (pp->p_flags & PSTOPPED)
|
|
stderror(ERR_STOPPED, neednl ? "\n" : "");
|
|
}
|
|
|
|
struct process *
|
|
pfind(cp)
|
|
Char *cp;
|
|
{
|
|
register struct process *pp, *np;
|
|
|
|
if (cp == 0 || cp[1] == 0 || eq(cp, STRcent2) || eq(cp, STRcentplus)) {
|
|
if (pcurrent == NULL)
|
|
stderror(ERR_NAME | ERR_JOBCUR);
|
|
return (pcurrent);
|
|
}
|
|
if (eq(cp, STRcentminus) || eq(cp, STRcenthash)) {
|
|
if (pprevious == NULL)
|
|
stderror(ERR_NAME | ERR_JOBPREV);
|
|
return (pprevious);
|
|
}
|
|
if (Isdigit(cp[1])) {
|
|
int idx = atoi(short2str(cp + 1));
|
|
|
|
for (pp = proclist.p_next; pp; pp = pp->p_next)
|
|
if (pp->p_index == idx && pp->p_pid == pp->p_jobid)
|
|
return (pp);
|
|
stderror(ERR_NAME | ERR_NOSUCHJOB);
|
|
}
|
|
np = NULL;
|
|
for (pp = proclist.p_next; pp; pp = pp->p_next)
|
|
if (pp->p_pid == pp->p_jobid) {
|
|
if (cp[1] == '?') {
|
|
register Char *dp;
|
|
|
|
for (dp = pp->p_command; *dp; dp++) {
|
|
if (*dp != cp[2])
|
|
continue;
|
|
if (prefix(cp + 2, dp))
|
|
goto match;
|
|
}
|
|
}
|
|
else if (prefix(cp + 1, pp->p_command)) {
|
|
match:
|
|
if (np)
|
|
stderror(ERR_NAME | ERR_AMBIG);
|
|
np = pp;
|
|
}
|
|
}
|
|
if (np)
|
|
return (np);
|
|
stderror(ERR_NAME | cp[1] == '?' ? ERR_JOBPAT : ERR_NOSUCHJOB);
|
|
/* NOTREACHED */
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* pgetcurr - find most recent job that is not pp, preferably stopped
|
|
*/
|
|
static struct process *
|
|
pgetcurr(pp)
|
|
register struct process *pp;
|
|
{
|
|
register struct process *np;
|
|
register struct process *xp = NULL;
|
|
|
|
for (np = proclist.p_next; np; np = np->p_next)
|
|
if (np != pcurrent && np != pp && np->p_pid &&
|
|
np->p_pid == np->p_jobid) {
|
|
if (np->p_flags & PSTOPPED)
|
|
return (np);
|
|
if (xp == NULL)
|
|
xp = np;
|
|
}
|
|
return (xp);
|
|
}
|
|
|
|
/*
|
|
* donotify - flag the job so as to report termination asynchronously
|
|
*/
|
|
void
|
|
/*ARGSUSED*/
|
|
donotify(v, t)
|
|
Char **v;
|
|
struct command *t;
|
|
{
|
|
register struct process *pp;
|
|
|
|
pp = pfind(*++v);
|
|
pp->p_flags |= PNOTIFY;
|
|
}
|
|
|
|
/*
|
|
* Do the fork and whatever should be done in the child side that
|
|
* should not be done if we are not forking at all (like for simple builtin's)
|
|
* Also do everything that needs any signals fiddled with in the parent side
|
|
*
|
|
* Wanttty tells whether process and/or tty pgrps are to be manipulated:
|
|
* -1: leave tty alone; inherit pgrp from parent
|
|
* 0: already have tty; manipulate process pgrps only
|
|
* 1: want to claim tty; manipulate process and tty pgrps
|
|
* It is usually just the value of tpgrp.
|
|
*/
|
|
|
|
int
|
|
pfork(t, wanttty)
|
|
struct command *t; /* command we are forking for */
|
|
int wanttty;
|
|
{
|
|
register int pid;
|
|
bool ignint = 0;
|
|
int pgrp;
|
|
sigset_t omask;
|
|
|
|
/*
|
|
* A child will be uninterruptible only under very special conditions.
|
|
* Remember that the semantics of '&' is implemented by disconnecting the
|
|
* process from the tty so signals do not need to ignored just for '&'.
|
|
* Thus signals are set to default action for children unless: we have had
|
|
* an "onintr -" (then specifically ignored) we are not playing with
|
|
* signals (inherit action)
|
|
*/
|
|
if (setintr)
|
|
ignint = (tpgrp == -1 && (t->t_dflg & F_NOINTERRUPT))
|
|
|| (gointr && eq(gointr, STRminus));
|
|
/*
|
|
* Check for maximum nesting of 16 processes to avoid Forking loops
|
|
*/
|
|
if (child == 16)
|
|
stderror(ERR_NESTING, 16);
|
|
/*
|
|
* Hold SIGCHLD until we have the process installed in our table.
|
|
*/
|
|
omask = sigblock(sigmask(SIGCHLD));
|
|
while ((pid = fork()) < 0)
|
|
if (setintr == 0)
|
|
(void) sleep(FORKSLEEP);
|
|
else {
|
|
(void) sigsetmask(omask);
|
|
stderror(ERR_NOPROC);
|
|
}
|
|
if (pid == 0) {
|
|
settimes();
|
|
pgrp = pcurrjob ? pcurrjob->p_jobid : getpid();
|
|
pflushall();
|
|
pcurrjob = NULL;
|
|
child++;
|
|
if (setintr) {
|
|
setintr = 0; /* until I think otherwise */
|
|
/*
|
|
* Children just get blown away on SIGINT, SIGQUIT unless "onintr
|
|
* -" seen.
|
|
*/
|
|
(void) signal(SIGINT, ignint ? SIG_IGN : SIG_DFL);
|
|
(void) signal(SIGQUIT, ignint ? SIG_IGN : SIG_DFL);
|
|
if (wanttty >= 0) {
|
|
/* make stoppable */
|
|
(void) signal(SIGTSTP, SIG_DFL);
|
|
(void) signal(SIGTTIN, SIG_DFL);
|
|
(void) signal(SIGTTOU, SIG_DFL);
|
|
}
|
|
(void) signal(SIGTERM, parterm);
|
|
}
|
|
else if (tpgrp == -1 && (t->t_dflg & F_NOINTERRUPT)) {
|
|
(void) signal(SIGINT, SIG_IGN);
|
|
(void) signal(SIGQUIT, SIG_IGN);
|
|
}
|
|
pgetty(wanttty, pgrp);
|
|
/*
|
|
* Nohup and nice apply only to NODE_COMMAND's but it would be nice
|
|
* (?!?) if you could say "nohup (foo;bar)" Then the parser would have
|
|
* to know about nice/nohup/time
|
|
*/
|
|
if (t->t_dflg & F_NOHUP)
|
|
(void) signal(SIGHUP, SIG_IGN);
|
|
if (t->t_dflg & F_NICE)
|
|
(void) setpriority(PRIO_PROCESS, 0, t->t_nice);
|
|
}
|
|
else {
|
|
if (wanttty >= 0)
|
|
(void) setpgid(pid, pcurrjob ? pcurrjob->p_jobid : pid);
|
|
palloc(pid, t);
|
|
(void) sigsetmask(omask);
|
|
}
|
|
|
|
return (pid);
|
|
}
|
|
|
|
static void
|
|
okpcntl()
|
|
{
|
|
if (tpgrp == -1)
|
|
stderror(ERR_JOBCONTROL);
|
|
if (tpgrp == 0)
|
|
stderror(ERR_JOBCTRLSUB);
|
|
}
|
|
|
|
/*
|
|
* if we don't have vfork(), things can still go in the wrong order
|
|
* resulting in the famous 'Stopped (tty output)'. But some systems
|
|
* don't permit the setpgid() call, (these are more recent secure
|
|
* systems such as ibm's aix). Then we'd rather print an error message
|
|
* than hang the shell!
|
|
* I am open to suggestions how to fix that.
|
|
*/
|
|
void
|
|
pgetty(wanttty, pgrp)
|
|
int wanttty, pgrp;
|
|
{
|
|
sigset_t omask = 0;
|
|
|
|
/*
|
|
* christos: I am blocking the tty signals till I've set things
|
|
* correctly....
|
|
*/
|
|
if (wanttty > 0)
|
|
omask = sigblock(sigmask(SIGTSTP)|sigmask(SIGTTIN)|sigmask(SIGTTOU));
|
|
/*
|
|
* From: Michael Schroeder <mlschroe@immd4.informatik.uni-erlangen.de>
|
|
* Don't check for tpgrp >= 0 so even non-interactive shells give
|
|
* background jobs process groups Same for the comparison in the other part
|
|
* of the #ifdef
|
|
*/
|
|
if (wanttty >= 0)
|
|
if (setpgid(0, pgrp) == -1) {
|
|
(void) fprintf(csherr, "csh: setpgid error.\n");
|
|
xexit(0);
|
|
}
|
|
|
|
if (wanttty > 0) {
|
|
(void) tcsetpgrp(FSHTTY, pgrp);
|
|
(void) sigsetmask(omask);
|
|
}
|
|
|
|
if (tpgrp > 0)
|
|
tpgrp = 0; /* gave tty away */
|
|
}
|