11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1991, 1993 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * This code is derived from software contributed to Berkeley by 61556Srgrimes * Kenneth Almquist. 71556Srgrimes * 81556Srgrimes * Redistribution and use in source and binary forms, with or without 91556Srgrimes * modification, are permitted provided that the following conditions 101556Srgrimes * are met: 111556Srgrimes * 1. Redistributions of source code must retain the above copyright 121556Srgrimes * notice, this list of conditions and the following disclaimer. 131556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141556Srgrimes * notice, this list of conditions and the following disclaimer in the 151556Srgrimes * documentation and/or other materials provided with the distribution. 161556Srgrimes * 4. Neither the name of the University nor the names of its contributors 171556Srgrimes * may be used to endorse or promote products derived from this software 181556Srgrimes * without specific prior written permission. 191556Srgrimes * 201556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301556Srgrimes * SUCH DAMAGE. 311556Srgrimes */ 321556Srgrimes 331556Srgrimes#ifndef lint 3436150Scharnier#if 0 3536150Scharnierstatic char sccsid[] = "@(#)jobs.c 8.5 (Berkeley) 5/4/95"; 3636150Scharnier#endif 371556Srgrimes#endif /* not lint */ 3899110Sobrien#include <sys/cdefs.h> 3999110Sobrien__FBSDID("$FreeBSD$"); 401556Srgrimes 41213775Sjhb#include <sys/ioctl.h> 42213775Sjhb#include <sys/param.h> 43213775Sjhb#include <sys/resource.h> 44213775Sjhb#include <sys/time.h> 45213775Sjhb#include <sys/wait.h> 46213775Sjhb#include <errno.h> 4717987Speter#include <fcntl.h> 48213775Sjhb#include <paths.h> 4917987Speter#include <signal.h> 50213925Sjilles#include <stddef.h> 51213775Sjhb#include <stdlib.h> 5217987Speter#include <unistd.h> 5317987Speter 541556Srgrimes#include "shell.h" 551556Srgrimes#if JOBS 5617987Speter#include <termios.h> 571556Srgrimes#undef CEOF /* syntax.h redefines this */ 581556Srgrimes#endif 5917987Speter#include "redir.h" 60249242Sjilles#include "exec.h" 6117987Speter#include "show.h" 621556Srgrimes#include "main.h" 631556Srgrimes#include "parser.h" 641556Srgrimes#include "nodes.h" 651556Srgrimes#include "jobs.h" 661556Srgrimes#include "options.h" 671556Srgrimes#include "trap.h" 681556Srgrimes#include "syntax.h" 691556Srgrimes#include "input.h" 701556Srgrimes#include "output.h" 711556Srgrimes#include "memalloc.h" 721556Srgrimes#include "error.h" 731556Srgrimes#include "mystring.h" 74223024Sjilles#include "var.h" 75223060Sjilles#include "builtins.h" 761556Srgrimes 771556Srgrimes 78213760Sobrienstatic struct job *jobtab; /* array of jobs */ 79213760Sobrienstatic int njobs; /* size of array */ 8028346SsteveMKINIT pid_t backgndpid = -1; /* pid of last background process */ 81209600SjillesMKINIT struct job *bgjob = NULL; /* last background process */ 821556Srgrimes#if JOBS 83213760Sobrienstatic struct job *jobmru; /* most recently used job list */ 84213760Sobrienstatic pid_t initialpgrp; /* pgrp of shell on invocation */ 851556Srgrimes#endif 8638536Scracauerint in_waitcmd = 0; /* are we in waitcmd()? */ 8738950Scracauerint in_dowait = 0; /* are we in dowait()? */ 8838536Scracauervolatile sig_atomic_t breakwaitcmd = 0; /* should wait be terminated? */ 8999762Stjrstatic int ttyfd = -1; 901556Srgrimes 9120425Ssteve#if JOBS 92213811Sobrienstatic void restartjob(struct job *); 9320425Ssteve#endif 94213811Sobrienstatic void freejob(struct job *); 95213811Sobrienstatic struct job *getjob(char *); 96213811Sobrienstatic pid_t dowait(int, struct job *); 97213811Sobrienstatic pid_t waitproc(int, int *); 98213811Sobrienstatic void checkzombies(void); 99213811Sobrienstatic void cmdtxt(union node *); 100213811Sobrienstatic void cmdputs(const char *); 10197659Stjr#if JOBS 102213811Sobrienstatic void setcurjob(struct job *); 103213811Sobrienstatic void deljob(struct job *); 104213811Sobrienstatic struct job *getcurjob(struct job *); 10597659Stjr#endif 106216217Sjillesstatic void printjobcmd(struct job *); 107216217Sjillesstatic void showjob(struct job *, int); 1081556Srgrimes 1091556Srgrimes 1101556Srgrimes/* 1111556Srgrimes * Turn job control on and off. 1121556Srgrimes */ 1131556Srgrimes 1141556SrgrimesMKINIT int jobctl; 1151556Srgrimes 11620425Ssteve#if JOBS 1171556Srgrimesvoid 11890111Simpsetjobctl(int on) 11917987Speter{ 12099762Stjr int i; 1211556Srgrimes 1221556Srgrimes if (on == jobctl || rootshell == 0) 1231556Srgrimes return; 1241556Srgrimes if (on) { 12599762Stjr if (ttyfd != -1) 12699762Stjr close(ttyfd); 12799762Stjr if ((ttyfd = open(_PATH_TTY, O_RDWR)) < 0) { 12899762Stjr i = 0; 12999762Stjr while (i <= 2 && !isatty(i)) 13099762Stjr i++; 131109927Stjr if (i > 2 || (ttyfd = fcntl(i, F_DUPFD, 10)) < 0) 13299762Stjr goto out; 13399762Stjr } 134109927Stjr if (ttyfd < 10) { 135109927Stjr /* 136109927Stjr * Keep our TTY file descriptor out of the way of 137109927Stjr * the user's redirections. 138109927Stjr */ 139109927Stjr if ((i = fcntl(ttyfd, F_DUPFD, 10)) < 0) { 140109927Stjr close(ttyfd); 141109927Stjr ttyfd = -1; 142109927Stjr goto out; 143109927Stjr } 144109927Stjr close(ttyfd); 145109927Stjr ttyfd = i; 146109927Stjr } 147103223Snectar if (fcntl(ttyfd, F_SETFD, FD_CLOEXEC) < 0) { 14899762Stjr close(ttyfd); 14999762Stjr ttyfd = -1; 15099762Stjr goto out; 15199762Stjr } 1521556Srgrimes do { /* while we are in the background */ 15399762Stjr initialpgrp = tcgetpgrp(ttyfd); 15420425Ssteve if (initialpgrp < 0) { 155199629Sjillesout: out2fmt_flush("sh: can't access tty; job control turned off\n"); 1561556Srgrimes mflag = 0; 1571556Srgrimes return; 1581556Srgrimes } 159216400Sjilles if (initialpgrp != getpgrp()) { 160216400Sjilles kill(0, SIGTTIN); 1611556Srgrimes continue; 1621556Srgrimes } 1631556Srgrimes } while (0); 1641556Srgrimes setsignal(SIGTSTP); 1651556Srgrimes setsignal(SIGTTOU); 1661556Srgrimes setsignal(SIGTTIN); 16717987Speter setpgid(0, rootpid); 16899762Stjr tcsetpgrp(ttyfd, rootpid); 1691556Srgrimes } else { /* turning job control off */ 17017987Speter setpgid(0, initialpgrp); 17199762Stjr tcsetpgrp(ttyfd, initialpgrp); 17299762Stjr close(ttyfd); 17399762Stjr ttyfd = -1; 1741556Srgrimes setsignal(SIGTSTP); 1751556Srgrimes setsignal(SIGTTOU); 1761556Srgrimes setsignal(SIGTTIN); 1771556Srgrimes } 1781556Srgrimes jobctl = on; 1791556Srgrimes} 18020425Ssteve#endif 1811556Srgrimes 1821556Srgrimes 1831556Srgrimes#if JOBS 18417987Speterint 18590111Simpfgcmd(int argc __unused, char **argv) 18617987Speter{ 1871556Srgrimes struct job *jp; 188100308Stjr pid_t pgrp; 1891556Srgrimes int status; 1901556Srgrimes 1911556Srgrimes jp = getjob(argv[1]); 1921556Srgrimes if (jp->jobctl == 0) 1931556Srgrimes error("job not created under job control"); 194216217Sjilles printjobcmd(jp); 19596933Stjr flushout(&output); 1961556Srgrimes pgrp = jp->ps[0].pid; 19799762Stjr tcsetpgrp(ttyfd, pgrp); 1981556Srgrimes restartjob(jp); 199100305Stjr jp->foreground = 1; 2001556Srgrimes INTOFF; 20145916Scracauer status = waitforjob(jp, (int *)NULL); 2021556Srgrimes INTON; 2031556Srgrimes return status; 2041556Srgrimes} 2051556Srgrimes 2061556Srgrimes 20717987Speterint 20890111Simpbgcmd(int argc, char **argv) 20917987Speter{ 2101556Srgrimes struct job *jp; 2111556Srgrimes 2121556Srgrimes do { 2131556Srgrimes jp = getjob(*++argv); 2141556Srgrimes if (jp->jobctl == 0) 2151556Srgrimes error("job not created under job control"); 21696933Stjr if (jp->state == JOBDONE) 21796933Stjr continue; 2181556Srgrimes restartjob(jp); 219100305Stjr jp->foreground = 0; 220216400Sjilles out1fmt("[%td] ", jp - jobtab + 1); 221216217Sjilles printjobcmd(jp); 2221556Srgrimes } while (--argc > 1); 2231556Srgrimes return 0; 2241556Srgrimes} 2251556Srgrimes 2261556Srgrimes 227213811Sobrienstatic void 22890111Simprestartjob(struct job *jp) 22917987Speter{ 2301556Srgrimes struct procstat *ps; 2311556Srgrimes int i; 2321556Srgrimes 2331556Srgrimes if (jp->state == JOBDONE) 2341556Srgrimes return; 23597660Stjr setcurjob(jp); 2361556Srgrimes INTOFF; 237216400Sjilles kill(-jp->ps[0].pid, SIGCONT); 2381556Srgrimes for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 23926104Ssteve if (WIFSTOPPED(ps->status)) { 2401556Srgrimes ps->status = -1; 2411556Srgrimes jp->state = 0; 2421556Srgrimes } 2431556Srgrimes } 2441556Srgrimes INTON; 2451556Srgrimes} 2461556Srgrimes#endif 2471556Srgrimes 2481556Srgrimes 2491556Srgrimesint 25097669Stjrjobscmd(int argc, char *argv[]) 25117987Speter{ 25297669Stjr char *id; 253163085Sstefanf int ch, mode; 25497669Stjr 25597669Stjr optind = optreset = 1; 256100663Stjr opterr = 0; 257163085Sstefanf mode = SHOWJOBS_DEFAULT; 258163085Sstefanf while ((ch = getopt(argc, argv, "lps")) != -1) { 25997669Stjr switch (ch) { 26097669Stjr case 'l': 261163085Sstefanf mode = SHOWJOBS_VERBOSE; 26297669Stjr break; 263163085Sstefanf case 'p': 264163085Sstefanf mode = SHOWJOBS_PGIDS; 265163085Sstefanf break; 26697669Stjr case 's': 267163085Sstefanf mode = SHOWJOBS_PIDS; 26897669Stjr break; 26997669Stjr case '?': 27097669Stjr default: 27197669Stjr error("unknown option: -%c", optopt); 27297669Stjr } 27397669Stjr } 27497669Stjr argc -= optind; 27597669Stjr argv += optind; 27697669Stjr 27797669Stjr if (argc == 0) 278163085Sstefanf showjobs(0, mode); 27997669Stjr else 28097669Stjr while ((id = *argv++) != NULL) 281216217Sjilles showjob(getjob(id), mode); 28297669Stjr 28397669Stjr return (0); 2841556Srgrimes} 2851556Srgrimes 286213811Sobrienstatic void 287216217Sjillesprintjobcmd(struct job *jp) 28897663Stjr{ 289216217Sjilles struct procstat *ps; 290216217Sjilles int i; 291216217Sjilles 292216217Sjilles for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 293216217Sjilles out1str(ps->cmd); 294216217Sjilles if (i > 0) 295216217Sjilles out1str(" | "); 296216217Sjilles } 297216217Sjilles out1c('\n'); 298216217Sjilles} 299216217Sjilles 300216217Sjillesstatic void 301216217Sjillesshowjob(struct job *jp, int mode) 302216217Sjilles{ 30397663Stjr char s[64]; 304216217Sjilles char statestr[64]; 30597663Stjr struct procstat *ps; 30697669Stjr struct job *j; 30797669Stjr int col, curr, i, jobno, prev, procno; 30897669Stjr char c; 3091556Srgrimes 310163085Sstefanf procno = (mode == SHOWJOBS_PGIDS) ? 1 : jp->nprocs; 31197663Stjr jobno = jp - jobtab + 1; 31297669Stjr curr = prev = 0; 31397669Stjr#if JOBS 31497669Stjr if ((j = getcurjob(NULL)) != NULL) { 31597669Stjr curr = j - jobtab + 1; 31697669Stjr if ((j = getcurjob(j)) != NULL) 31797669Stjr prev = j - jobtab + 1; 31897669Stjr } 31997669Stjr#endif 320216217Sjilles ps = jp->ps + jp->nprocs - 1; 321216217Sjilles if (jp->state == 0) { 322216217Sjilles strcpy(statestr, "Running"); 323216217Sjilles#if JOBS 324216217Sjilles } else if (jp->state == JOBSTOPPED) { 325216217Sjilles while (!WIFSTOPPED(ps->status) && ps > jp->ps) 326216217Sjilles ps--; 327216217Sjilles if (WIFSTOPPED(ps->status)) 328216217Sjilles i = WSTOPSIG(ps->status); 329216217Sjilles else 330216217Sjilles i = -1; 331216217Sjilles if (i > 0 && i < sys_nsig && sys_siglist[i]) 332216217Sjilles strcpy(statestr, sys_siglist[i]); 333216217Sjilles else 334216217Sjilles strcpy(statestr, "Suspended"); 335216217Sjilles#endif 336216217Sjilles } else if (WIFEXITED(ps->status)) { 337216217Sjilles if (WEXITSTATUS(ps->status) == 0) 338216217Sjilles strcpy(statestr, "Done"); 339216217Sjilles else 340216220Sjilles fmtstr(statestr, 64, "Done(%d)", 341216217Sjilles WEXITSTATUS(ps->status)); 342216217Sjilles } else { 343216217Sjilles i = WTERMSIG(ps->status); 344216217Sjilles if (i > 0 && i < sys_nsig && sys_siglist[i]) 345216217Sjilles strcpy(statestr, sys_siglist[i]); 346216217Sjilles else 347216217Sjilles fmtstr(statestr, 64, "Signal %d", i); 348216217Sjilles if (WCOREDUMP(ps->status)) 349216217Sjilles strcat(statestr, " (core dumped)"); 350216217Sjilles } 351216217Sjilles 35297663Stjr for (ps = jp->ps ; ; ps++) { /* for each process */ 353163085Sstefanf if (mode == SHOWJOBS_PIDS || mode == SHOWJOBS_PGIDS) { 354216199Sjilles out1fmt("%d\n", (int)ps->pid); 35597669Stjr goto skip; 35697669Stjr } 357216217Sjilles if (mode != SHOWJOBS_VERBOSE && ps != jp->ps) 35897669Stjr goto skip; 35997819Stjr if (jobno == curr && ps == jp->ps) 36097669Stjr c = '+'; 36197819Stjr else if (jobno == prev && ps == jp->ps) 36297669Stjr c = '-'; 36397669Stjr else 36497669Stjr c = ' '; 36597663Stjr if (ps == jp->ps) 36697669Stjr fmtstr(s, 64, "[%d] %c ", jobno, c); 36797663Stjr else 36897816Stjr fmtstr(s, 64, " %c ", c); 36997663Stjr out1str(s); 37097663Stjr col = strlen(s); 371163085Sstefanf if (mode == SHOWJOBS_VERBOSE) { 372100308Stjr fmtstr(s, 64, "%d ", (int)ps->pid); 37397669Stjr out1str(s); 37497669Stjr col += strlen(s); 37597669Stjr } 376216217Sjilles if (ps == jp->ps) { 377216217Sjilles out1str(statestr); 378216217Sjilles col += strlen(statestr); 37997663Stjr } 38097663Stjr do { 38197663Stjr out1c(' '); 38297663Stjr col++; 38397663Stjr } while (col < 30); 384216217Sjilles if (mode == SHOWJOBS_VERBOSE) { 385216217Sjilles out1str(ps->cmd); 386216217Sjilles out1c('\n'); 387216217Sjilles } else 388216217Sjilles printjobcmd(jp); 38997669Stjrskip: if (--procno <= 0) 39097663Stjr break; 39197663Stjr } 39297663Stjr} 39397663Stjr 3941556Srgrimes/* 3951556Srgrimes * Print a list of jobs. If "change" is nonzero, only print jobs whose 3961556Srgrimes * statuses have changed since the last call to showjobs. 3971556Srgrimes * 3981556Srgrimes * If the shell is interrupted in the process of creating a job, the 3991556Srgrimes * result may be a job structure containing zero processes. Such structures 4001556Srgrimes * will be freed here. 4011556Srgrimes */ 4021556Srgrimes 4031556Srgrimesvoid 404163085Sstefanfshowjobs(int change, int mode) 40517987Speter{ 4061556Srgrimes int jobno; 4071556Srgrimes struct job *jp; 4081556Srgrimes 4091556Srgrimes TRACE(("showjobs(%d) called\n", change)); 410208489Sjilles checkzombies(); 4111556Srgrimes for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) { 4121556Srgrimes if (! jp->used) 4131556Srgrimes continue; 4141556Srgrimes if (jp->nprocs == 0) { 4151556Srgrimes freejob(jp); 4161556Srgrimes continue; 4171556Srgrimes } 4181556Srgrimes if (change && ! jp->changed) 4191556Srgrimes continue; 420216217Sjilles showjob(jp, mode); 4211556Srgrimes jp->changed = 0; 422209600Sjilles /* Hack: discard jobs for which $! has not been referenced 423209600Sjilles * in interactive mode when they terminate. 424209600Sjilles */ 425209600Sjilles if (jp->state == JOBDONE && !jp->remembered && 426209600Sjilles (iflag || jp != bgjob)) { 4271556Srgrimes freejob(jp); 4281556Srgrimes } 4291556Srgrimes } 4301556Srgrimes} 4311556Srgrimes 4321556Srgrimes 4331556Srgrimes/* 4341556Srgrimes * Mark a job structure as unused. 4351556Srgrimes */ 4361556Srgrimes 437213811Sobrienstatic void 43890111Simpfreejob(struct job *jp) 43990111Simp{ 4401556Srgrimes struct procstat *ps; 4411556Srgrimes int i; 4421556Srgrimes 4431556Srgrimes INTOFF; 444209600Sjilles if (bgjob == jp) 445209600Sjilles bgjob = NULL; 4461556Srgrimes for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { 4471556Srgrimes if (ps->cmd != nullstr) 4481556Srgrimes ckfree(ps->cmd); 4491556Srgrimes } 4501556Srgrimes if (jp->ps != &jp->ps0) 4511556Srgrimes ckfree(jp->ps); 4521556Srgrimes jp->used = 0; 4531556Srgrimes#if JOBS 45497659Stjr deljob(jp); 4551556Srgrimes#endif 4561556Srgrimes INTON; 4571556Srgrimes} 4581556Srgrimes 4591556Srgrimes 4601556Srgrimes 4611556Srgrimesint 462252617Sjilleswaitcmd(int argc __unused, char **argv __unused) 46317987Speter{ 4641556Srgrimes struct job *job; 46526104Ssteve int status, retval; 4661556Srgrimes struct job *jp; 4671556Srgrimes 468252617Sjilles nextopt(""); 469252617Sjilles if (*argptr != NULL) { 470252617Sjilles job = getjob(*argptr); 4711556Srgrimes } else { 4721556Srgrimes job = NULL; 4731556Srgrimes } 47438536Scracauer 47538536Scracauer /* 47638536Scracauer * Loop until a process is terminated or stopped, or a SIGINT is 47738536Scracauer * received. 47838536Scracauer */ 47938536Scracauer 48038521Scracauer in_waitcmd++; 48138536Scracauer do { 4821556Srgrimes if (job != NULL) { 4831556Srgrimes if (job->state) { 4841556Srgrimes status = job->ps[job->nprocs - 1].status; 48526104Ssteve if (WIFEXITED(status)) 48626104Ssteve retval = WEXITSTATUS(status); 4871556Srgrimes#if JOBS 48826104Ssteve else if (WIFSTOPPED(status)) 48926104Ssteve retval = WSTOPSIG(status) + 128; 4901556Srgrimes#endif 4911556Srgrimes else 49226104Ssteve retval = WTERMSIG(status) + 128; 493209600Sjilles if (! iflag || ! job->changed) 4941556Srgrimes freejob(job); 495209600Sjilles else { 496209600Sjilles job->remembered = 0; 497209600Sjilles if (job == bgjob) 498209600Sjilles bgjob = NULL; 499209600Sjilles } 50038536Scracauer in_waitcmd--; 50126104Ssteve return retval; 5021556Srgrimes } 5031556Srgrimes } else { 504209600Sjilles for (jp = jobtab ; jp < jobtab + njobs; jp++) 505209600Sjilles if (jp->used && jp->state == JOBDONE) { 506209600Sjilles if (! iflag || ! jp->changed) 507209600Sjilles freejob(jp); 508209600Sjilles else { 509209600Sjilles jp->remembered = 0; 510209600Sjilles if (jp == bgjob) 511209600Sjilles bgjob = NULL; 512209600Sjilles } 513209600Sjilles } 5141556Srgrimes for (jp = jobtab ; ; jp++) { 5151556Srgrimes if (jp >= jobtab + njobs) { /* no running procs */ 51638536Scracauer in_waitcmd--; 5171556Srgrimes return 0; 5181556Srgrimes } 5191556Srgrimes if (jp->used && jp->state == 0) 5201556Srgrimes break; 5211556Srgrimes } 5221556Srgrimes } 52338521Scracauer } while (dowait(1, (struct job *)NULL) != -1); 52438521Scracauer in_waitcmd--; 52538521Scracauer 52638521Scracauer return 0; 5271556Srgrimes} 5281556Srgrimes 5291556Srgrimes 5301556Srgrimes 53117987Speterint 53290111Simpjobidcmd(int argc __unused, char **argv) 53317987Speter{ 5341556Srgrimes struct job *jp; 5351556Srgrimes int i; 5361556Srgrimes 5371556Srgrimes jp = getjob(argv[1]); 5381556Srgrimes for (i = 0 ; i < jp->nprocs ; ) { 539100308Stjr out1fmt("%d", (int)jp->ps[i].pid); 5401556Srgrimes out1c(++i < jp->nprocs? ' ' : '\n'); 5411556Srgrimes } 5421556Srgrimes return 0; 5431556Srgrimes} 5441556Srgrimes 5451556Srgrimes 5461556Srgrimes 5471556Srgrimes/* 5481556Srgrimes * Convert a job name to a job structure. 5491556Srgrimes */ 5501556Srgrimes 551213811Sobrienstatic struct job * 55290111Simpgetjob(char *name) 55390111Simp{ 5541556Srgrimes int jobno; 55597688Stjr struct job *found, *jp; 556100308Stjr pid_t pid; 5571556Srgrimes int i; 5581556Srgrimes 5591556Srgrimes if (name == NULL) { 5601556Srgrimes#if JOBS 56197659Stjrcurrentjob: if ((jp = getcurjob(NULL)) == NULL) 5621556Srgrimes error("No current job"); 56397659Stjr return (jp); 5641556Srgrimes#else 5651556Srgrimes error("No current job"); 5661556Srgrimes#endif 5671556Srgrimes } else if (name[0] == '%') { 5681556Srgrimes if (is_digit(name[1])) { 5691556Srgrimes jobno = number(name + 1); 5701556Srgrimes if (jobno > 0 && jobno <= njobs 5711556Srgrimes && jobtab[jobno - 1].used != 0) 5721556Srgrimes return &jobtab[jobno - 1]; 5731556Srgrimes#if JOBS 5741556Srgrimes } else if (name[1] == '%' && name[2] == '\0') { 5751556Srgrimes goto currentjob; 57697688Stjr } else if (name[1] == '+' && name[2] == '\0') { 57797688Stjr goto currentjob; 57897688Stjr } else if (name[1] == '-' && name[2] == '\0') { 57997688Stjr if ((jp = getcurjob(NULL)) == NULL || 58097688Stjr (jp = getcurjob(jp)) == NULL) 58197688Stjr error("No previous job"); 58297688Stjr return (jp); 5831556Srgrimes#endif 58497688Stjr } else if (name[1] == '?') { 58597688Stjr found = NULL; 58697688Stjr for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 58797688Stjr if (jp->used && jp->nprocs > 0 58897688Stjr && strstr(jp->ps[0].cmd, name + 2) != NULL) { 58997688Stjr if (found) 59097688Stjr error("%s: ambiguous", name); 59197688Stjr found = jp; 59297688Stjr } 59397688Stjr } 59497688Stjr if (found != NULL) 59597688Stjr return (found); 5961556Srgrimes } else { 59797688Stjr found = NULL; 5981556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 5991556Srgrimes if (jp->used && jp->nprocs > 0 6001556Srgrimes && prefix(name + 1, jp->ps[0].cmd)) { 6011556Srgrimes if (found) 6021556Srgrimes error("%s: ambiguous", name); 6031556Srgrimes found = jp; 6041556Srgrimes } 6051556Srgrimes } 6061556Srgrimes if (found) 6071556Srgrimes return found; 6081556Srgrimes } 6091556Srgrimes } else if (is_number(name)) { 610100308Stjr pid = (pid_t)number(name); 6111556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 6121556Srgrimes if (jp->used && jp->nprocs > 0 6131556Srgrimes && jp->ps[jp->nprocs - 1].pid == pid) 6141556Srgrimes return jp; 6151556Srgrimes } 6161556Srgrimes } 6171556Srgrimes error("No such job: %s", name); 61817987Speter /*NOTREACHED*/ 61917987Speter return NULL; 6201556Srgrimes} 6211556Srgrimes 6221556Srgrimes 623216629Sjillespid_t 624216629Sjillesgetjobpgrp(char *name) 625216629Sjilles{ 626216629Sjilles struct job *jp; 6271556Srgrimes 628216629Sjilles jp = getjob(name); 629216629Sjilles return -jp->ps[0].pid; 630216629Sjilles} 631216629Sjilles 6321556Srgrimes/* 6331556Srgrimes * Return a new job structure, 6341556Srgrimes */ 6351556Srgrimes 6361556Srgrimesstruct job * 63790111Simpmakejob(union node *node __unused, int nprocs) 63817987Speter{ 6391556Srgrimes int i; 6401556Srgrimes struct job *jp; 6411556Srgrimes 6421556Srgrimes for (i = njobs, jp = jobtab ; ; jp++) { 6431556Srgrimes if (--i < 0) { 6441556Srgrimes INTOFF; 6451556Srgrimes if (njobs == 0) { 6461556Srgrimes jobtab = ckmalloc(4 * sizeof jobtab[0]); 64797664Stjr#if JOBS 64897659Stjr jobmru = NULL; 64997664Stjr#endif 6501556Srgrimes } else { 6511556Srgrimes jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); 65217987Speter memcpy(jp, jobtab, njobs * sizeof jp[0]); 65397659Stjr#if JOBS 65497659Stjr /* Relocate `next' pointers and list head */ 65599760Stjr if (jobmru != NULL) 65699760Stjr jobmru = &jp[jobmru - jobtab]; 65797659Stjr for (i = 0; i < njobs; i++) 65897659Stjr if (jp[i].next != NULL) 65997659Stjr jp[i].next = &jp[jp[i].next - 66097659Stjr jobtab]; 66197659Stjr#endif 662209600Sjilles if (bgjob != NULL) 663209600Sjilles bgjob = &jp[bgjob - jobtab]; 66420425Ssteve /* Relocate `ps' pointers */ 66520425Ssteve for (i = 0; i < njobs; i++) 66620425Ssteve if (jp[i].ps == &jobtab[i].ps0) 66720425Ssteve jp[i].ps = &jp[i].ps0; 6681556Srgrimes ckfree(jobtab); 6691556Srgrimes jobtab = jp; 6701556Srgrimes } 6711556Srgrimes jp = jobtab + njobs; 6721556Srgrimes for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0); 6731556Srgrimes INTON; 6741556Srgrimes break; 6751556Srgrimes } 6761556Srgrimes if (jp->used == 0) 6771556Srgrimes break; 6781556Srgrimes } 6791556Srgrimes INTOFF; 6801556Srgrimes jp->state = 0; 6811556Srgrimes jp->used = 1; 6821556Srgrimes jp->changed = 0; 6831556Srgrimes jp->nprocs = 0; 684100305Stjr jp->foreground = 0; 685209600Sjilles jp->remembered = 0; 6861556Srgrimes#if JOBS 6871556Srgrimes jp->jobctl = jobctl; 68897659Stjr jp->next = NULL; 6891556Srgrimes#endif 6901556Srgrimes if (nprocs > 1) { 6911556Srgrimes jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); 6921556Srgrimes } else { 6931556Srgrimes jp->ps = &jp->ps0; 6941556Srgrimes } 6951556Srgrimes INTON; 696213775Sjhb TRACE(("makejob(%p, %d) returns %%%td\n", (void *)node, nprocs, 69717987Speter jp - jobtab + 1)); 6981556Srgrimes return jp; 6998855Srgrimes} 7001556Srgrimes 70197659Stjr#if JOBS 702213811Sobrienstatic void 70397659Stjrsetcurjob(struct job *cj) 70497659Stjr{ 70597659Stjr struct job *jp, *prev; 7061556Srgrimes 70797659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 70897659Stjr if (jp == cj) { 70997659Stjr if (prev != NULL) 71097659Stjr prev->next = jp->next; 71197659Stjr else 71297659Stjr jobmru = jp->next; 71397659Stjr jp->next = jobmru; 71497659Stjr jobmru = cj; 71597659Stjr return; 71697659Stjr } 71797659Stjr } 71897659Stjr cj->next = jobmru; 71997659Stjr jobmru = cj; 72097659Stjr} 72197659Stjr 722213811Sobrienstatic void 72397659Stjrdeljob(struct job *j) 72497659Stjr{ 72597659Stjr struct job *jp, *prev; 72697659Stjr 72797659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 72897659Stjr if (jp == j) { 72997659Stjr if (prev != NULL) 73097659Stjr prev->next = jp->next; 73197659Stjr else 73297659Stjr jobmru = jp->next; 73397659Stjr return; 73497659Stjr } 73597659Stjr } 73697659Stjr} 73797659Stjr 7381556Srgrimes/* 73997659Stjr * Return the most recently used job that isn't `nj', and preferably one 74097659Stjr * that is stopped. 74197659Stjr */ 742213811Sobrienstatic struct job * 74397659Stjrgetcurjob(struct job *nj) 74497659Stjr{ 74597659Stjr struct job *jp; 74697659Stjr 74797659Stjr /* Try to find a stopped one.. */ 74897659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 74997659Stjr if (jp->used && jp != nj && jp->state == JOBSTOPPED) 75097659Stjr return (jp); 75197659Stjr /* Otherwise the most recently used job that isn't `nj' */ 75297659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 75397659Stjr if (jp->used && jp != nj) 75497659Stjr return (jp); 75597659Stjr 75697659Stjr return (NULL); 75797659Stjr} 75897659Stjr 75997659Stjr#endif 76097659Stjr 76197659Stjr/* 7621556Srgrimes * Fork of a subshell. If we are doing job control, give the subshell its 7631556Srgrimes * own process group. Jp is a job structure that the job is to be added to. 7641556Srgrimes * N is the command that will be evaluated by the child. Both jp and n may 7651556Srgrimes * be NULL. The mode parameter can be one of the following: 7661556Srgrimes * FORK_FG - Fork off a foreground process. 7671556Srgrimes * FORK_BG - Fork off a background process. 7681556Srgrimes * FORK_NOJOB - Like FORK_FG, but don't give the process its own 7691556Srgrimes * process group even if job control is on. 7701556Srgrimes * 7711556Srgrimes * When job control is turned off, background processes have their standard 7721556Srgrimes * input redirected to /dev/null (except for the second and later processes 7731556Srgrimes * in a pipeline). 7741556Srgrimes */ 7751556Srgrimes 776100308Stjrpid_t 77790111Simpforkshell(struct job *jp, union node *n, int mode) 77817987Speter{ 779100308Stjr pid_t pid; 780100308Stjr pid_t pgrp; 7811556Srgrimes 782213775Sjhb TRACE(("forkshell(%%%td, %p, %d) called\n", jp - jobtab, (void *)n, 78317987Speter mode)); 7841556Srgrimes INTOFF; 785216208Sjilles if (mode == FORK_BG && (jp == NULL || jp->nprocs == 0)) 786208489Sjilles checkzombies(); 787112341Stjr flushall(); 7881556Srgrimes pid = fork(); 7891556Srgrimes if (pid == -1) { 7901556Srgrimes TRACE(("Fork failed, errno=%d\n", errno)); 7911556Srgrimes INTON; 79253891Scracauer error("Cannot fork: %s", strerror(errno)); 7931556Srgrimes } 7941556Srgrimes if (pid == 0) { 7951556Srgrimes struct job *p; 7961556Srgrimes int wasroot; 7971556Srgrimes int i; 7981556Srgrimes 799100308Stjr TRACE(("Child shell %d\n", (int)getpid())); 8001556Srgrimes wasroot = rootshell; 8011556Srgrimes rootshell = 0; 802200998Sjilles handler = &main_handler; 8031556Srgrimes closescript(); 8041556Srgrimes INTON; 805223024Sjilles forcelocal = 0; 8061556Srgrimes clear_traps(); 8071556Srgrimes#if JOBS 8081556Srgrimes jobctl = 0; /* do job control only in root shell */ 8091556Srgrimes if (wasroot && mode != FORK_NOJOB && mflag) { 8101556Srgrimes if (jp == NULL || jp->nprocs == 0) 8111556Srgrimes pgrp = getpid(); 8121556Srgrimes else 8131556Srgrimes pgrp = jp->ps[0].pid; 81421352Ssteve if (setpgid(0, pgrp) == 0 && mode == FORK_FG) { 8151556Srgrimes /*** this causes superfluous TIOCSPGRPS ***/ 81699762Stjr if (tcsetpgrp(ttyfd, pgrp) < 0) 81720425Ssteve error("tcsetpgrp failed, errno=%d", errno); 8181556Srgrimes } 8191556Srgrimes setsignal(SIGTSTP); 8201556Srgrimes setsignal(SIGTTOU); 8211556Srgrimes } else if (mode == FORK_BG) { 8221556Srgrimes ignoresig(SIGINT); 8231556Srgrimes ignoresig(SIGQUIT); 8241556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 8251556Srgrimes ! fd0_redirected_p ()) { 8261556Srgrimes close(0); 82769793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 828222684Sjilles error("cannot open %s: %s", 82969793Sobrien _PATH_DEVNULL, strerror(errno)); 8301556Srgrimes } 8311556Srgrimes } 8321556Srgrimes#else 8331556Srgrimes if (mode == FORK_BG) { 8341556Srgrimes ignoresig(SIGINT); 8351556Srgrimes ignoresig(SIGQUIT); 8361556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 8371556Srgrimes ! fd0_redirected_p ()) { 8381556Srgrimes close(0); 83969793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 840222684Sjilles error("cannot open %s: %s", 84169793Sobrien _PATH_DEVNULL, strerror(errno)); 8421556Srgrimes } 8431556Srgrimes } 8441556Srgrimes#endif 845102051Stjr INTOFF; 846102051Stjr for (i = njobs, p = jobtab ; --i >= 0 ; p++) 847102051Stjr if (p->used) 848102051Stjr freejob(p); 849102051Stjr INTON; 8501556Srgrimes if (wasroot && iflag) { 8511556Srgrimes setsignal(SIGINT); 8521556Srgrimes setsignal(SIGQUIT); 8531556Srgrimes setsignal(SIGTERM); 8541556Srgrimes } 8551556Srgrimes return pid; 8561556Srgrimes } 8571556Srgrimes if (rootshell && mode != FORK_NOJOB && mflag) { 8581556Srgrimes if (jp == NULL || jp->nprocs == 0) 8591556Srgrimes pgrp = pid; 8601556Srgrimes else 8611556Srgrimes pgrp = jp->ps[0].pid; 86217987Speter setpgid(pid, pgrp); 8631556Srgrimes } 864209600Sjilles if (mode == FORK_BG) { 865209600Sjilles if (bgjob != NULL && bgjob->state == JOBDONE && 866209600Sjilles !bgjob->remembered && !iflag) 867209600Sjilles freejob(bgjob); 8681556Srgrimes backgndpid = pid; /* set $! */ 869209600Sjilles bgjob = jp; 870209600Sjilles } 8711556Srgrimes if (jp) { 8721556Srgrimes struct procstat *ps = &jp->ps[jp->nprocs++]; 8731556Srgrimes ps->pid = pid; 8741556Srgrimes ps->status = -1; 8751556Srgrimes ps->cmd = nullstr; 8761556Srgrimes if (iflag && rootshell && n) 8771556Srgrimes ps->cmd = commandtext(n); 878100305Stjr jp->foreground = mode == FORK_FG; 87997659Stjr#if JOBS 88097659Stjr setcurjob(jp); 88197659Stjr#endif 8821556Srgrimes } 8831556Srgrimes INTON; 884100308Stjr TRACE(("In parent shell: child = %d\n", (int)pid)); 8851556Srgrimes return pid; 8861556Srgrimes} 8871556Srgrimes 8881556Srgrimes 889249242Sjillespid_t 890249242Sjillesvforkexecshell(struct job *jp, char **argv, char **envp, const char *path, int idx, int pip[2]) 891249242Sjilles{ 892249242Sjilles pid_t pid; 893249242Sjilles struct jmploc jmploc; 894249242Sjilles struct jmploc *savehandler; 8951556Srgrimes 896249242Sjilles TRACE(("vforkexecshell(%%%td, %s, %p) called\n", jp - jobtab, argv[0], 897249242Sjilles (void *)pip)); 898249242Sjilles INTOFF; 899249242Sjilles flushall(); 900249242Sjilles savehandler = handler; 901249242Sjilles pid = vfork(); 902249242Sjilles if (pid == -1) { 903249242Sjilles TRACE(("Vfork failed, errno=%d\n", errno)); 904249242Sjilles INTON; 905249242Sjilles error("Cannot fork: %s", strerror(errno)); 906249242Sjilles } 907249242Sjilles if (pid == 0) { 908249242Sjilles TRACE(("Child shell %d\n", (int)getpid())); 909249242Sjilles if (setjmp(jmploc.loc)) 910249242Sjilles _exit(exception == EXEXEC ? exerrno : 2); 911249242Sjilles if (pip != NULL) { 912249242Sjilles close(pip[0]); 913249242Sjilles if (pip[1] != 1) { 914249242Sjilles dup2(pip[1], 1); 915249242Sjilles close(pip[1]); 916249242Sjilles } 917249242Sjilles } 918249242Sjilles handler = &jmploc; 919249242Sjilles shellexec(argv, envp, path, idx); 920249242Sjilles } 921249242Sjilles handler = savehandler; 922249242Sjilles if (jp) { 923249242Sjilles struct procstat *ps = &jp->ps[jp->nprocs++]; 924249242Sjilles ps->pid = pid; 925249242Sjilles ps->status = -1; 926249242Sjilles ps->cmd = nullstr; 927249242Sjilles jp->foreground = 1; 928249242Sjilles#if JOBS 929249242Sjilles setcurjob(jp); 930249242Sjilles#endif 931249242Sjilles } 932249242Sjilles INTON; 933249242Sjilles TRACE(("In parent shell: child = %d\n", (int)pid)); 934249242Sjilles return pid; 935249242Sjilles} 936249242Sjilles 937249242Sjilles 9381556Srgrimes/* 9391556Srgrimes * Wait for job to finish. 9401556Srgrimes * 9411556Srgrimes * Under job control we have the problem that while a child process is 9421556Srgrimes * running interrupts generated by the user are sent to the child but not 9431556Srgrimes * to the shell. This means that an infinite loop started by an inter- 9441556Srgrimes * active user may be hard to kill. With job control turned off, an 9451556Srgrimes * interactive user may place an interactive program inside a loop. If 9461556Srgrimes * the interactive program catches interrupts, the user doesn't want 9471556Srgrimes * these interrupts to also abort the loop. The approach we take here 9481556Srgrimes * is to have the shell ignore interrupt signals while waiting for a 94946684Skris * foreground process to terminate, and then send itself an interrupt 9501556Srgrimes * signal if the child process was terminated by an interrupt signal. 9511556Srgrimes * Unfortunately, some programs want to do a bit of cleanup and then 9521556Srgrimes * exit on interrupt; unless these processes terminate themselves by 9531556Srgrimes * sending a signal to themselves (instead of calling exit) they will 9541556Srgrimes * confuse this approach. 9551556Srgrimes */ 9561556Srgrimes 9571556Srgrimesint 95890111Simpwaitforjob(struct job *jp, int *origstatus) 95945916Scracauer{ 9601556Srgrimes#if JOBS 961100308Stjr pid_t mypgrp = getpgrp(); 962208881Sjilles int propagate_int = jp->jobctl && jp->foreground; 9631556Srgrimes#endif 9641556Srgrimes int status; 9651556Srgrimes int st; 9661556Srgrimes 9671556Srgrimes INTOFF; 968213775Sjhb TRACE(("waitforjob(%%%td) called\n", jp - jobtab + 1)); 96938950Scracauer while (jp->state == 0) 97038950Scracauer if (dowait(1, jp) == -1) 97138950Scracauer dotrap(); 9721556Srgrimes#if JOBS 9731556Srgrimes if (jp->jobctl) { 97499762Stjr if (tcsetpgrp(ttyfd, mypgrp) < 0) 97520425Ssteve error("tcsetpgrp failed, errno=%d\n", errno); 9761556Srgrimes } 9771556Srgrimes if (jp->state == JOBSTOPPED) 97897659Stjr setcurjob(jp); 9791556Srgrimes#endif 9801556Srgrimes status = jp->ps[jp->nprocs - 1].status; 98145916Scracauer if (origstatus != NULL) 98245916Scracauer *origstatus = status; 9831556Srgrimes /* convert to 8 bits */ 98426104Ssteve if (WIFEXITED(status)) 98526104Ssteve st = WEXITSTATUS(status); 9861556Srgrimes#if JOBS 98726104Ssteve else if (WIFSTOPPED(status)) 98826104Ssteve st = WSTOPSIG(status) + 128; 9891556Srgrimes#endif 9901556Srgrimes else 99126104Ssteve st = WTERMSIG(status) + 128; 9921556Srgrimes if (! JOBS || jp->state == JOBDONE) 9931556Srgrimes freejob(jp); 99438521Scracauer if (int_pending()) { 995216400Sjilles if (!WIFSIGNALED(status) || WTERMSIG(status) != SIGINT) 99638521Scracauer CLEAR_PENDING_INT; 99738521Scracauer } 998208881Sjilles#if JOBS 999208881Sjilles else if (rootshell && iflag && propagate_int && 1000208881Sjilles WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) 1001208881Sjilles kill(getpid(), SIGINT); 1002208881Sjilles#endif 10031556Srgrimes INTON; 10041556Srgrimes return st; 10051556Srgrimes} 10061556Srgrimes 10071556Srgrimes 10081556Srgrimes 10091556Srgrimes/* 10101556Srgrimes * Wait for a process to terminate. 10111556Srgrimes */ 10121556Srgrimes 1013213811Sobrienstatic pid_t 101490111Simpdowait(int block, struct job *job) 101517987Speter{ 1016100308Stjr pid_t pid; 10171556Srgrimes int status; 10181556Srgrimes struct procstat *sp; 10191556Srgrimes struct job *jp; 10201556Srgrimes struct job *thisjob; 10211556Srgrimes int done; 10221556Srgrimes int stopped; 102326104Ssteve int sig; 1024216217Sjilles int coredump; 10251556Srgrimes 102638950Scracauer in_dowait++; 10271556Srgrimes TRACE(("dowait(%d) called\n", block)); 10281556Srgrimes do { 10291556Srgrimes pid = waitproc(block, &status); 1030100308Stjr TRACE(("wait returns %d, status=%d\n", (int)pid, status)); 103172086Scracauer } while ((pid == -1 && errno == EINTR && breakwaitcmd == 0) || 1032125501Scracauer (pid > 0 && WIFSTOPPED(status) && !iflag)); 103338950Scracauer in_dowait--; 1034153417Smaxim if (pid == -1 && errno == ECHILD && job != NULL) 1035153417Smaxim job->state = JOBDONE; 103638521Scracauer if (breakwaitcmd != 0) { 103738521Scracauer breakwaitcmd = 0; 1038138312Smaxim if (pid <= 0) 1039138312Smaxim return -1; 104038521Scracauer } 10411556Srgrimes if (pid <= 0) 10421556Srgrimes return pid; 10431556Srgrimes INTOFF; 10441556Srgrimes thisjob = NULL; 10451556Srgrimes for (jp = jobtab ; jp < jobtab + njobs ; jp++) { 1046216208Sjilles if (jp->used && jp->nprocs > 0) { 10471556Srgrimes done = 1; 10481556Srgrimes stopped = 1; 10491556Srgrimes for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { 10501556Srgrimes if (sp->pid == -1) 10511556Srgrimes continue; 10521556Srgrimes if (sp->pid == pid) { 105326104Ssteve TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", 1054100308Stjr (int)pid, sp->status, 1055100308Stjr status)); 10561556Srgrimes sp->status = status; 10571556Srgrimes thisjob = jp; 10581556Srgrimes } 10591556Srgrimes if (sp->status == -1) 10601556Srgrimes stopped = 0; 106126104Ssteve else if (WIFSTOPPED(sp->status)) 10621556Srgrimes done = 0; 10631556Srgrimes } 10641556Srgrimes if (stopped) { /* stopped or done */ 10651556Srgrimes int state = done? JOBDONE : JOBSTOPPED; 10661556Srgrimes if (jp->state != state) { 1067213775Sjhb TRACE(("Job %td: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); 10681556Srgrimes jp->state = state; 1069209600Sjilles if (jp != job) { 1070209600Sjilles if (done && !jp->remembered && 1071209600Sjilles !iflag && jp != bgjob) 1072209600Sjilles freejob(jp); 10731556Srgrimes#if JOBS 1074209600Sjilles else if (done) 1075209600Sjilles deljob(jp); 10761556Srgrimes#endif 1077209600Sjilles } 10781556Srgrimes } 10791556Srgrimes } 10801556Srgrimes } 10811556Srgrimes } 10821556Srgrimes INTON; 1083216217Sjilles if (!thisjob || thisjob->state == 0) 1084216217Sjilles ; 1085216217Sjilles else if ((!rootshell || !iflag || thisjob == job) && 1086216217Sjilles thisjob->foreground && thisjob->state != JOBSTOPPED) { 1087216217Sjilles sig = 0; 1088216217Sjilles coredump = 0; 1089216217Sjilles for (sp = thisjob->ps; sp < thisjob->ps + thisjob->nprocs; sp++) 1090216217Sjilles if (WIFSIGNALED(sp->status)) { 1091216217Sjilles sig = WTERMSIG(sp->status); 1092216217Sjilles coredump = WCOREDUMP(sp->status); 1093216217Sjilles } 1094216217Sjilles if (sig > 0 && sig != SIGINT && sig != SIGPIPE) { 1095216217Sjilles if (sig < sys_nsig && sys_siglist[sig]) 1096218105Sjilles out2str(sys_siglist[sig]); 109726104Ssteve else 1098218105Sjilles outfmt(out2, "Signal %d", sig); 1099216217Sjilles if (coredump) 1100218105Sjilles out2str(" (core dumped)"); 1101218105Sjilles out2c('\n'); 1102218105Sjilles flushout(out2); 11031556Srgrimes } 11041556Srgrimes } else { 1105109627Stjr TRACE(("Not printing status, rootshell=%d, job=%p\n", rootshell, job)); 1106216217Sjilles thisjob->changed = 1; 11071556Srgrimes } 11081556Srgrimes return pid; 11091556Srgrimes} 11101556Srgrimes 11111556Srgrimes 11121556Srgrimes 11131556Srgrimes/* 11141556Srgrimes * Do a wait system call. If job control is compiled in, we accept 11151556Srgrimes * stopped processes. If block is zero, we return a value of zero 11161556Srgrimes * rather than blocking. 11171556Srgrimes */ 1118213811Sobrienstatic pid_t 111990111Simpwaitproc(int block, int *status) 112017987Speter{ 11211556Srgrimes int flags; 11221556Srgrimes 11231556Srgrimes#if JOBS 11241556Srgrimes flags = WUNTRACED; 11251556Srgrimes#else 11261556Srgrimes flags = 0; 11271556Srgrimes#endif 11281556Srgrimes if (block == 0) 11291556Srgrimes flags |= WNOHANG; 11301556Srgrimes return wait3(status, flags, (struct rusage *)NULL); 11311556Srgrimes} 11321556Srgrimes 11331556Srgrimes/* 11341556Srgrimes * return 1 if there are stopped jobs, otherwise 0 11351556Srgrimes */ 11361556Srgrimesint job_warning = 0; 11371556Srgrimesint 113890111Simpstoppedjobs(void) 11391556Srgrimes{ 114025222Ssteve int jobno; 114125222Ssteve struct job *jp; 11421556Srgrimes 11431556Srgrimes if (job_warning) 11441556Srgrimes return (0); 11451556Srgrimes for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { 11461556Srgrimes if (jp->used == 0) 11471556Srgrimes continue; 11481556Srgrimes if (jp->state == JOBSTOPPED) { 1149199629Sjilles out2fmt_flush("You have stopped jobs.\n"); 11501556Srgrimes job_warning = 2; 11511556Srgrimes return (1); 11521556Srgrimes } 11531556Srgrimes } 11541556Srgrimes 11551556Srgrimes return (0); 11561556Srgrimes} 11571556Srgrimes 1158208489Sjilles 1159213811Sobrienstatic void 1160208489Sjillescheckzombies(void) 1161208489Sjilles{ 1162208489Sjilles while (njobs > 0 && dowait(0, NULL) > 0) 1163208489Sjilles ; 1164208489Sjilles} 1165208489Sjilles 1166208489Sjilles 1167209600Sjillesint 1168209600Sjillesbackgndpidset(void) 1169209600Sjilles{ 1170209600Sjilles return backgndpid != -1; 1171209600Sjilles} 1172209600Sjilles 1173209600Sjilles 1174209600Sjillespid_t 1175209600Sjillesbackgndpidval(void) 1176209600Sjilles{ 1177223024Sjilles if (bgjob != NULL && !forcelocal) 1178209600Sjilles bgjob->remembered = 1; 1179209600Sjilles return backgndpid; 1180209600Sjilles} 1181209600Sjilles 11821556Srgrimes/* 11831556Srgrimes * Return a string identifying a command (to be printed by the 11841556Srgrimes * jobs command. 11851556Srgrimes */ 11861556Srgrimes 1187213760Sobrienstatic char *cmdnextc; 1188213760Sobrienstatic int cmdnleft; 11891556Srgrimes#define MAXCMDTEXT 200 11901556Srgrimes 11911556Srgrimeschar * 119290111Simpcommandtext(union node *n) 119390111Simp{ 11941556Srgrimes char *name; 11951556Srgrimes 11961556Srgrimes cmdnextc = name = ckmalloc(MAXCMDTEXT); 11971556Srgrimes cmdnleft = MAXCMDTEXT - 4; 11981556Srgrimes cmdtxt(n); 11991556Srgrimes *cmdnextc = '\0'; 12001556Srgrimes return name; 12011556Srgrimes} 12021556Srgrimes 12031556Srgrimes 1204213811Sobrienstatic void 120590111Simpcmdtxt(union node *n) 120690111Simp{ 12071556Srgrimes union node *np; 12081556Srgrimes struct nodelist *lp; 1209201053Sjilles const char *p; 12101556Srgrimes int i; 12111556Srgrimes char s[2]; 12121556Srgrimes 12131556Srgrimes if (n == NULL) 12141556Srgrimes return; 12151556Srgrimes switch (n->type) { 12161556Srgrimes case NSEMI: 12171556Srgrimes cmdtxt(n->nbinary.ch1); 12181556Srgrimes cmdputs("; "); 12191556Srgrimes cmdtxt(n->nbinary.ch2); 12201556Srgrimes break; 12211556Srgrimes case NAND: 12221556Srgrimes cmdtxt(n->nbinary.ch1); 12231556Srgrimes cmdputs(" && "); 12241556Srgrimes cmdtxt(n->nbinary.ch2); 12251556Srgrimes break; 12261556Srgrimes case NOR: 12271556Srgrimes cmdtxt(n->nbinary.ch1); 12281556Srgrimes cmdputs(" || "); 12291556Srgrimes cmdtxt(n->nbinary.ch2); 12301556Srgrimes break; 12311556Srgrimes case NPIPE: 12321556Srgrimes for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 12331556Srgrimes cmdtxt(lp->n); 12341556Srgrimes if (lp->next) 12351556Srgrimes cmdputs(" | "); 12361556Srgrimes } 12371556Srgrimes break; 12381556Srgrimes case NSUBSHELL: 12391556Srgrimes cmdputs("("); 12401556Srgrimes cmdtxt(n->nredir.n); 12411556Srgrimes cmdputs(")"); 12421556Srgrimes break; 12431556Srgrimes case NREDIR: 12441556Srgrimes case NBACKGND: 12451556Srgrimes cmdtxt(n->nredir.n); 12461556Srgrimes break; 12471556Srgrimes case NIF: 12481556Srgrimes cmdputs("if "); 12491556Srgrimes cmdtxt(n->nif.test); 12501556Srgrimes cmdputs("; then "); 12511556Srgrimes cmdtxt(n->nif.ifpart); 12521556Srgrimes cmdputs("..."); 12531556Srgrimes break; 12541556Srgrimes case NWHILE: 12551556Srgrimes cmdputs("while "); 12561556Srgrimes goto until; 12571556Srgrimes case NUNTIL: 12581556Srgrimes cmdputs("until "); 12591556Srgrimesuntil: 12601556Srgrimes cmdtxt(n->nbinary.ch1); 12611556Srgrimes cmdputs("; do "); 12621556Srgrimes cmdtxt(n->nbinary.ch2); 12631556Srgrimes cmdputs("; done"); 12641556Srgrimes break; 12651556Srgrimes case NFOR: 12661556Srgrimes cmdputs("for "); 12671556Srgrimes cmdputs(n->nfor.var); 12681556Srgrimes cmdputs(" in ..."); 12691556Srgrimes break; 12701556Srgrimes case NCASE: 12711556Srgrimes cmdputs("case "); 12721556Srgrimes cmdputs(n->ncase.expr->narg.text); 12731556Srgrimes cmdputs(" in ..."); 12741556Srgrimes break; 12751556Srgrimes case NDEFUN: 12761556Srgrimes cmdputs(n->narg.text); 12771556Srgrimes cmdputs("() ..."); 12781556Srgrimes break; 12791556Srgrimes case NCMD: 12801556Srgrimes for (np = n->ncmd.args ; np ; np = np->narg.next) { 12811556Srgrimes cmdtxt(np); 12821556Srgrimes if (np->narg.next) 12831556Srgrimes cmdputs(" "); 12841556Srgrimes } 12851556Srgrimes for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { 12861556Srgrimes cmdputs(" "); 12871556Srgrimes cmdtxt(np); 12881556Srgrimes } 12891556Srgrimes break; 12901556Srgrimes case NARG: 12911556Srgrimes cmdputs(n->narg.text); 12921556Srgrimes break; 12931556Srgrimes case NTO: 12941556Srgrimes p = ">"; i = 1; goto redir; 12951556Srgrimes case NAPPEND: 12961556Srgrimes p = ">>"; i = 1; goto redir; 12971556Srgrimes case NTOFD: 12981556Srgrimes p = ">&"; i = 1; goto redir; 129996922Stjr case NCLOBBER: 130096922Stjr p = ">|"; i = 1; goto redir; 13011556Srgrimes case NFROM: 13021556Srgrimes p = "<"; i = 0; goto redir; 130366612Sbrian case NFROMTO: 130466612Sbrian p = "<>"; i = 0; goto redir; 13051556Srgrimes case NFROMFD: 13061556Srgrimes p = "<&"; i = 0; goto redir; 13071556Srgrimesredir: 13081556Srgrimes if (n->nfile.fd != i) { 13091556Srgrimes s[0] = n->nfile.fd + '0'; 13101556Srgrimes s[1] = '\0'; 13111556Srgrimes cmdputs(s); 13121556Srgrimes } 13131556Srgrimes cmdputs(p); 13141556Srgrimes if (n->type == NTOFD || n->type == NFROMFD) { 131599634Stjr if (n->ndup.dupfd >= 0) 131699634Stjr s[0] = n->ndup.dupfd + '0'; 131799634Stjr else 131899634Stjr s[0] = '-'; 13191556Srgrimes s[1] = '\0'; 13201556Srgrimes cmdputs(s); 13211556Srgrimes } else { 13221556Srgrimes cmdtxt(n->nfile.fname); 13231556Srgrimes } 13241556Srgrimes break; 13251556Srgrimes case NHERE: 13261556Srgrimes case NXHERE: 13271556Srgrimes cmdputs("<<..."); 13281556Srgrimes break; 13291556Srgrimes default: 13301556Srgrimes cmdputs("???"); 13311556Srgrimes break; 13321556Srgrimes } 13331556Srgrimes} 13341556Srgrimes 13351556Srgrimes 13361556Srgrimes 1337213811Sobrienstatic void 1338201053Sjillescmdputs(const char *s) 133990111Simp{ 1340201053Sjilles const char *p; 1341201053Sjilles char *q; 134225222Ssteve char c; 13431556Srgrimes int subtype = 0; 13441556Srgrimes 13451556Srgrimes if (cmdnleft <= 0) 13461556Srgrimes return; 13471556Srgrimes p = s; 13481556Srgrimes q = cmdnextc; 13491556Srgrimes while ((c = *p++) != '\0') { 13501556Srgrimes if (c == CTLESC) 13511556Srgrimes *q++ = *p++; 13521556Srgrimes else if (c == CTLVAR) { 13531556Srgrimes *q++ = '$'; 13541556Srgrimes if (--cmdnleft > 0) 13551556Srgrimes *q++ = '{'; 13561556Srgrimes subtype = *p++; 1357216246Sjilles if ((subtype & VSTYPE) == VSLENGTH && --cmdnleft > 0) 1358216246Sjilles *q++ = '#'; 13591556Srgrimes } else if (c == '=' && subtype != 0) { 1360216246Sjilles *q = "}-+?=##%%\0X"[(subtype & VSTYPE) - VSNORMAL]; 1361216246Sjilles if (*q) 1362216246Sjilles q++; 1363216246Sjilles else 1364216246Sjilles cmdnleft++; 1365216246Sjilles if (((subtype & VSTYPE) == VSTRIMLEFTMAX || 1366216246Sjilles (subtype & VSTYPE) == VSTRIMRIGHTMAX) && 1367216246Sjilles --cmdnleft > 0) 1368216246Sjilles *q = q[-1], q++; 13691556Srgrimes subtype = 0; 13701556Srgrimes } else if (c == CTLENDVAR) { 13711556Srgrimes *q++ = '}'; 1372216246Sjilles } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) { 1373216246Sjilles cmdnleft -= 5; 1374216246Sjilles if (cmdnleft > 0) { 1375216246Sjilles *q++ = '$'; 1376216246Sjilles *q++ = '('; 1377216246Sjilles *q++ = '.'; 1378216246Sjilles *q++ = '.'; 1379216246Sjilles *q++ = '.'; 1380216246Sjilles *q++ = ')'; 1381216246Sjilles } 1382216246Sjilles } else if (c == CTLARI) { 1383216246Sjilles cmdnleft -= 2; 1384216246Sjilles if (cmdnleft > 0) { 1385216246Sjilles *q++ = '$'; 1386216246Sjilles *q++ = '('; 1387216246Sjilles *q++ = '('; 1388216246Sjilles } 1389216246Sjilles p++; 1390216246Sjilles } else if (c == CTLENDARI) { 1391216246Sjilles if (--cmdnleft > 0) { 1392216246Sjilles *q++ = ')'; 1393216246Sjilles *q++ = ')'; 1394216246Sjilles } 1395216246Sjilles } else if (c == CTLQUOTEMARK || c == CTLQUOTEEND) 1396216246Sjilles cmdnleft++; /* ignore */ 13971556Srgrimes else 13981556Srgrimes *q++ = c; 13991556Srgrimes if (--cmdnleft <= 0) { 14001556Srgrimes *q++ = '.'; 14011556Srgrimes *q++ = '.'; 14021556Srgrimes *q++ = '.'; 14031556Srgrimes break; 14041556Srgrimes } 14051556Srgrimes } 14061556Srgrimes cmdnextc = q; 14071556Srgrimes} 1408