jobs.c revision 213811
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: head/bin/sh/jobs.c 213811 2010-10-13 22:18:03Z obrien $"); 401556Srgrimes 41213775Sjhb#include <sys/ioctl.h> 42213775Sjhb#include <sys/param.h> 43213775Sjhb#include <sys/resource.h> 44213775Sjhb#include <sys/stddef.h> 45213775Sjhb#include <sys/time.h> 46213775Sjhb#include <sys/wait.h> 47213775Sjhb#include <errno.h> 4817987Speter#include <fcntl.h> 49213775Sjhb#include <paths.h> 5017987Speter#include <signal.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" 6017987Speter#include "show.h" 611556Srgrimes#include "main.h" 621556Srgrimes#include "parser.h" 631556Srgrimes#include "nodes.h" 641556Srgrimes#include "jobs.h" 651556Srgrimes#include "options.h" 661556Srgrimes#include "trap.h" 671556Srgrimes#include "syntax.h" 681556Srgrimes#include "input.h" 691556Srgrimes#include "output.h" 701556Srgrimes#include "memalloc.h" 711556Srgrimes#include "error.h" 721556Srgrimes#include "mystring.h" 731556Srgrimes 741556Srgrimes 75213760Sobrienstatic struct job *jobtab; /* array of jobs */ 76213760Sobrienstatic int njobs; /* size of array */ 7728346SsteveMKINIT pid_t backgndpid = -1; /* pid of last background process */ 78209600SjillesMKINIT struct job *bgjob = NULL; /* last background process */ 791556Srgrimes#if JOBS 80213760Sobrienstatic struct job *jobmru; /* most recently used job list */ 81213760Sobrienstatic pid_t initialpgrp; /* pgrp of shell on invocation */ 821556Srgrimes#endif 8338536Scracauerint in_waitcmd = 0; /* are we in waitcmd()? */ 8438950Scracauerint in_dowait = 0; /* are we in dowait()? */ 8538536Scracauervolatile sig_atomic_t breakwaitcmd = 0; /* should wait be terminated? */ 8699762Stjrstatic int ttyfd = -1; 871556Srgrimes 8820425Ssteve#if JOBS 89213811Sobrienstatic void restartjob(struct job *); 9020425Ssteve#endif 91213811Sobrienstatic void freejob(struct job *); 92213811Sobrienstatic struct job *getjob(char *); 93213811Sobrienstatic pid_t dowait(int, struct job *); 94213811Sobrienstatic pid_t waitproc(int, int *); 95213811Sobrienstatic void checkzombies(void); 96213811Sobrienstatic void cmdtxt(union node *); 97213811Sobrienstatic void cmdputs(const char *); 9897659Stjr#if JOBS 99213811Sobrienstatic void setcurjob(struct job *); 100213811Sobrienstatic void deljob(struct job *); 101213811Sobrienstatic struct job *getcurjob(struct job *); 10297659Stjr#endif 103213811Sobrienstatic void showjob(struct job *, pid_t, int); 1041556Srgrimes 1051556Srgrimes 1061556Srgrimes/* 1071556Srgrimes * Turn job control on and off. 1081556Srgrimes */ 1091556Srgrimes 1101556SrgrimesMKINIT int jobctl; 1111556Srgrimes 11220425Ssteve#if JOBS 1131556Srgrimesvoid 11490111Simpsetjobctl(int on) 11517987Speter{ 11699762Stjr int i; 1171556Srgrimes 1181556Srgrimes if (on == jobctl || rootshell == 0) 1191556Srgrimes return; 1201556Srgrimes if (on) { 12199762Stjr if (ttyfd != -1) 12299762Stjr close(ttyfd); 12399762Stjr if ((ttyfd = open(_PATH_TTY, O_RDWR)) < 0) { 12499762Stjr i = 0; 12599762Stjr while (i <= 2 && !isatty(i)) 12699762Stjr i++; 127109927Stjr if (i > 2 || (ttyfd = fcntl(i, F_DUPFD, 10)) < 0) 12899762Stjr goto out; 12999762Stjr } 130109927Stjr if (ttyfd < 10) { 131109927Stjr /* 132109927Stjr * Keep our TTY file descriptor out of the way of 133109927Stjr * the user's redirections. 134109927Stjr */ 135109927Stjr if ((i = fcntl(ttyfd, F_DUPFD, 10)) < 0) { 136109927Stjr close(ttyfd); 137109927Stjr ttyfd = -1; 138109927Stjr goto out; 139109927Stjr } 140109927Stjr close(ttyfd); 141109927Stjr ttyfd = i; 142109927Stjr } 143103223Snectar if (fcntl(ttyfd, F_SETFD, FD_CLOEXEC) < 0) { 14499762Stjr close(ttyfd); 14599762Stjr ttyfd = -1; 14699762Stjr goto out; 14799762Stjr } 1481556Srgrimes do { /* while we are in the background */ 14999762Stjr initialpgrp = tcgetpgrp(ttyfd); 15020425Ssteve if (initialpgrp < 0) { 151199629Sjillesout: out2fmt_flush("sh: can't access tty; job control turned off\n"); 1521556Srgrimes mflag = 0; 1531556Srgrimes return; 1541556Srgrimes } 1551556Srgrimes if (initialpgrp == -1) 15617987Speter initialpgrp = getpgrp(); 15717987Speter else if (initialpgrp != getpgrp()) { 15899762Stjr killpg(0, SIGTTIN); 1591556Srgrimes continue; 1601556Srgrimes } 1611556Srgrimes } while (0); 1621556Srgrimes setsignal(SIGTSTP); 1631556Srgrimes setsignal(SIGTTOU); 1641556Srgrimes setsignal(SIGTTIN); 16517987Speter setpgid(0, rootpid); 16699762Stjr tcsetpgrp(ttyfd, rootpid); 1671556Srgrimes } else { /* turning job control off */ 16817987Speter setpgid(0, initialpgrp); 16999762Stjr tcsetpgrp(ttyfd, initialpgrp); 17099762Stjr close(ttyfd); 17199762Stjr ttyfd = -1; 1721556Srgrimes setsignal(SIGTSTP); 1731556Srgrimes setsignal(SIGTTOU); 1741556Srgrimes setsignal(SIGTTIN); 1751556Srgrimes } 1761556Srgrimes jobctl = on; 1771556Srgrimes} 17820425Ssteve#endif 1791556Srgrimes 1801556Srgrimes 1811556Srgrimes#ifdef mkinit 18228346SsteveINCLUDE <sys/types.h> 18317987SpeterINCLUDE <stdlib.h> 1841556Srgrimes 1851556SrgrimesSHELLPROC { 1861556Srgrimes backgndpid = -1; 187209600Sjilles bgjob = NULL; 1881556Srgrimes#if JOBS 1891556Srgrimes jobctl = 0; 1901556Srgrimes#endif 1911556Srgrimes} 1921556Srgrimes 1931556Srgrimes#endif 1941556Srgrimes 1951556Srgrimes 1961556Srgrimes 1971556Srgrimes#if JOBS 19817987Speterint 19990111Simpfgcmd(int argc __unused, char **argv) 20017987Speter{ 2011556Srgrimes struct job *jp; 202100308Stjr pid_t pgrp; 2031556Srgrimes int status; 2041556Srgrimes 2051556Srgrimes jp = getjob(argv[1]); 2061556Srgrimes if (jp->jobctl == 0) 2071556Srgrimes error("job not created under job control"); 20896933Stjr out1str(jp->ps[0].cmd); 20996933Stjr out1c('\n'); 21096933Stjr flushout(&output); 2111556Srgrimes pgrp = jp->ps[0].pid; 21299762Stjr tcsetpgrp(ttyfd, pgrp); 2131556Srgrimes restartjob(jp); 214100305Stjr jp->foreground = 1; 2151556Srgrimes INTOFF; 21645916Scracauer status = waitforjob(jp, (int *)NULL); 2171556Srgrimes INTON; 2181556Srgrimes return status; 2191556Srgrimes} 2201556Srgrimes 2211556Srgrimes 22217987Speterint 22390111Simpbgcmd(int argc, char **argv) 22417987Speter{ 22596933Stjr char s[64]; 2261556Srgrimes struct job *jp; 2271556Srgrimes 2281556Srgrimes do { 2291556Srgrimes jp = getjob(*++argv); 2301556Srgrimes if (jp->jobctl == 0) 2311556Srgrimes error("job not created under job control"); 23296933Stjr if (jp->state == JOBDONE) 23396933Stjr continue; 2341556Srgrimes restartjob(jp); 235100305Stjr jp->foreground = 0; 236104275Smux fmtstr(s, 64, "[%td] ", jp - jobtab + 1); 23796933Stjr out1str(s); 23896933Stjr out1str(jp->ps[0].cmd); 23996933Stjr out1c('\n'); 2401556Srgrimes } while (--argc > 1); 2411556Srgrimes return 0; 2421556Srgrimes} 2431556Srgrimes 2441556Srgrimes 245213811Sobrienstatic void 24690111Simprestartjob(struct job *jp) 24717987Speter{ 2481556Srgrimes struct procstat *ps; 2491556Srgrimes int i; 2501556Srgrimes 2511556Srgrimes if (jp->state == JOBDONE) 2521556Srgrimes return; 25397660Stjr setcurjob(jp); 2541556Srgrimes INTOFF; 2551556Srgrimes killpg(jp->ps[0].pid, SIGCONT); 2561556Srgrimes for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 25726104Ssteve if (WIFSTOPPED(ps->status)) { 2581556Srgrimes ps->status = -1; 2591556Srgrimes jp->state = 0; 2601556Srgrimes } 2611556Srgrimes } 2621556Srgrimes INTON; 2631556Srgrimes} 2641556Srgrimes#endif 2651556Srgrimes 2661556Srgrimes 2671556Srgrimesint 26897669Stjrjobscmd(int argc, char *argv[]) 26917987Speter{ 27097669Stjr char *id; 271163085Sstefanf int ch, mode; 27297669Stjr 27397669Stjr optind = optreset = 1; 274100663Stjr opterr = 0; 275163085Sstefanf mode = SHOWJOBS_DEFAULT; 276163085Sstefanf while ((ch = getopt(argc, argv, "lps")) != -1) { 27797669Stjr switch (ch) { 27897669Stjr case 'l': 279163085Sstefanf mode = SHOWJOBS_VERBOSE; 28097669Stjr break; 281163085Sstefanf case 'p': 282163085Sstefanf mode = SHOWJOBS_PGIDS; 283163085Sstefanf break; 28497669Stjr case 's': 285163085Sstefanf mode = SHOWJOBS_PIDS; 28697669Stjr break; 28797669Stjr case '?': 28897669Stjr default: 28997669Stjr error("unknown option: -%c", optopt); 29097669Stjr } 29197669Stjr } 29297669Stjr argc -= optind; 29397669Stjr argv += optind; 29497669Stjr 29597669Stjr if (argc == 0) 296163085Sstefanf showjobs(0, mode); 29797669Stjr else 29897669Stjr while ((id = *argv++) != NULL) 299163085Sstefanf showjob(getjob(id), 0, mode); 30097669Stjr 30197669Stjr return (0); 3021556Srgrimes} 3031556Srgrimes 304213811Sobrienstatic void 305163085Sstefanfshowjob(struct job *jp, pid_t pid, int mode) 30697663Stjr{ 30797663Stjr char s[64]; 30897663Stjr struct procstat *ps; 30997669Stjr struct job *j; 31097669Stjr int col, curr, i, jobno, prev, procno; 311163085Sstefanf pid_t ppid; 31297669Stjr char c; 3131556Srgrimes 314163085Sstefanf procno = (mode == SHOWJOBS_PGIDS) ? 1 : jp->nprocs; 31597663Stjr jobno = jp - jobtab + 1; 31697669Stjr curr = prev = 0; 31797669Stjr#if JOBS 31897669Stjr if ((j = getcurjob(NULL)) != NULL) { 31997669Stjr curr = j - jobtab + 1; 32097669Stjr if ((j = getcurjob(j)) != NULL) 32197669Stjr prev = j - jobtab + 1; 32297669Stjr } 32397669Stjr#endif 32497663Stjr for (ps = jp->ps ; ; ps++) { /* for each process */ 325163085Sstefanf if (mode == SHOWJOBS_PIDS || mode == SHOWJOBS_PGIDS) { 326163085Sstefanf ppid = (mode == SHOWJOBS_PIDS) ? ps->pid : 327163085Sstefanf getpgid(ps->pid); 328163085Sstefanf out1fmt("%d\n", (int)ppid); 32997669Stjr goto skip; 33097669Stjr } 331163085Sstefanf if (mode != SHOWJOBS_VERBOSE && ps != jp->ps && pid == 0) 33297669Stjr goto skip; 33397822Stjr if (pid != 0 && pid != ps->pid) 33497822Stjr goto skip; 33597819Stjr if (jobno == curr && ps == jp->ps) 33697669Stjr c = '+'; 33797819Stjr else if (jobno == prev && ps == jp->ps) 33897669Stjr c = '-'; 33997669Stjr else 34097669Stjr c = ' '; 34197663Stjr if (ps == jp->ps) 34297669Stjr fmtstr(s, 64, "[%d] %c ", jobno, c); 34397663Stjr else 34497816Stjr fmtstr(s, 64, " %c ", c); 34597663Stjr out1str(s); 34697663Stjr col = strlen(s); 347163085Sstefanf if (mode == SHOWJOBS_VERBOSE) { 348100308Stjr fmtstr(s, 64, "%d ", (int)ps->pid); 34997669Stjr out1str(s); 35097669Stjr col += strlen(s); 35197669Stjr } 35297663Stjr s[0] = '\0'; 35397819Stjr if (ps != jp->ps) { 35497819Stjr *s = '\0'; 35597819Stjr } else if (ps->status == -1) { 35697669Stjr strcpy(s, "Running"); 35797663Stjr } else if (WIFEXITED(ps->status)) { 35897820Stjr if (WEXITSTATUS(ps->status) == 0) 35997820Stjr strcpy(s, "Done"); 36097820Stjr else 36197820Stjr fmtstr(s, 64, "Done (%d)", 36297820Stjr WEXITSTATUS(ps->status)); 36397663Stjr } else { 36497663Stjr#if JOBS 365155301Sschweikh if (WIFSTOPPED(ps->status)) 36697663Stjr i = WSTOPSIG(ps->status); 36797663Stjr else 36897663Stjr#endif 36997663Stjr i = WTERMSIG(ps->status); 370125155Snjl if ((i & 0x7F) < sys_nsig && sys_siglist[i & 0x7F]) 37197663Stjr scopy(sys_siglist[i & 0x7F], s); 37297663Stjr else 37397663Stjr fmtstr(s, 64, "Signal %d", i & 0x7F); 37497663Stjr if (WCOREDUMP(ps->status)) 37597663Stjr strcat(s, " (core dumped)"); 37697663Stjr } 37797663Stjr out1str(s); 37897663Stjr col += strlen(s); 37997663Stjr do { 38097663Stjr out1c(' '); 38197663Stjr col++; 38297663Stjr } while (col < 30); 38397663Stjr out1str(ps->cmd); 38497663Stjr out1c('\n'); 38597669Stjrskip: if (--procno <= 0) 38697663Stjr break; 38797663Stjr } 38897663Stjr} 38997663Stjr 3901556Srgrimes/* 3911556Srgrimes * Print a list of jobs. If "change" is nonzero, only print jobs whose 3921556Srgrimes * statuses have changed since the last call to showjobs. 3931556Srgrimes * 3941556Srgrimes * If the shell is interrupted in the process of creating a job, the 3951556Srgrimes * result may be a job structure containing zero processes. Such structures 3961556Srgrimes * will be freed here. 3971556Srgrimes */ 3981556Srgrimes 3991556Srgrimesvoid 400163085Sstefanfshowjobs(int change, int mode) 40117987Speter{ 4021556Srgrimes int jobno; 4031556Srgrimes struct job *jp; 4041556Srgrimes 4051556Srgrimes TRACE(("showjobs(%d) called\n", change)); 406208489Sjilles checkzombies(); 4071556Srgrimes for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) { 4081556Srgrimes if (! jp->used) 4091556Srgrimes continue; 4101556Srgrimes if (jp->nprocs == 0) { 4111556Srgrimes freejob(jp); 4121556Srgrimes continue; 4131556Srgrimes } 4141556Srgrimes if (change && ! jp->changed) 4151556Srgrimes continue; 416163085Sstefanf showjob(jp, 0, mode); 4171556Srgrimes jp->changed = 0; 418209600Sjilles /* Hack: discard jobs for which $! has not been referenced 419209600Sjilles * in interactive mode when they terminate. 420209600Sjilles */ 421209600Sjilles if (jp->state == JOBDONE && !jp->remembered && 422209600Sjilles (iflag || jp != bgjob)) { 4231556Srgrimes freejob(jp); 4241556Srgrimes } 4251556Srgrimes } 4261556Srgrimes} 4271556Srgrimes 4281556Srgrimes 4291556Srgrimes/* 4301556Srgrimes * Mark a job structure as unused. 4311556Srgrimes */ 4321556Srgrimes 433213811Sobrienstatic void 43490111Simpfreejob(struct job *jp) 43590111Simp{ 4361556Srgrimes struct procstat *ps; 4371556Srgrimes int i; 4381556Srgrimes 4391556Srgrimes INTOFF; 440209600Sjilles if (bgjob == jp) 441209600Sjilles bgjob = NULL; 4421556Srgrimes for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { 4431556Srgrimes if (ps->cmd != nullstr) 4441556Srgrimes ckfree(ps->cmd); 4451556Srgrimes } 4461556Srgrimes if (jp->ps != &jp->ps0) 4471556Srgrimes ckfree(jp->ps); 4481556Srgrimes jp->used = 0; 4491556Srgrimes#if JOBS 45097659Stjr deljob(jp); 4511556Srgrimes#endif 4521556Srgrimes INTON; 4531556Srgrimes} 4541556Srgrimes 4551556Srgrimes 4561556Srgrimes 4571556Srgrimesint 45890111Simpwaitcmd(int argc, char **argv) 45917987Speter{ 4601556Srgrimes struct job *job; 46126104Ssteve int status, retval; 4621556Srgrimes struct job *jp; 4631556Srgrimes 4641556Srgrimes if (argc > 1) { 4651556Srgrimes job = getjob(argv[1]); 4661556Srgrimes } else { 4671556Srgrimes job = NULL; 4681556Srgrimes } 46938536Scracauer 47038536Scracauer /* 47138536Scracauer * Loop until a process is terminated or stopped, or a SIGINT is 47238536Scracauer * received. 47338536Scracauer */ 47438536Scracauer 47538521Scracauer in_waitcmd++; 47638536Scracauer do { 4771556Srgrimes if (job != NULL) { 4781556Srgrimes if (job->state) { 4791556Srgrimes status = job->ps[job->nprocs - 1].status; 48026104Ssteve if (WIFEXITED(status)) 48126104Ssteve retval = WEXITSTATUS(status); 4821556Srgrimes#if JOBS 48326104Ssteve else if (WIFSTOPPED(status)) 48426104Ssteve retval = WSTOPSIG(status) + 128; 4851556Srgrimes#endif 4861556Srgrimes else 48726104Ssteve retval = WTERMSIG(status) + 128; 488209600Sjilles if (! iflag || ! job->changed) 4891556Srgrimes freejob(job); 490209600Sjilles else { 491209600Sjilles job->remembered = 0; 492209600Sjilles if (job == bgjob) 493209600Sjilles bgjob = NULL; 494209600Sjilles } 49538536Scracauer in_waitcmd--; 49626104Ssteve return retval; 4971556Srgrimes } 4981556Srgrimes } else { 499209600Sjilles for (jp = jobtab ; jp < jobtab + njobs; jp++) 500209600Sjilles if (jp->used && jp->state == JOBDONE) { 501209600Sjilles if (! iflag || ! jp->changed) 502209600Sjilles freejob(jp); 503209600Sjilles else { 504209600Sjilles jp->remembered = 0; 505209600Sjilles if (jp == bgjob) 506209600Sjilles bgjob = NULL; 507209600Sjilles } 508209600Sjilles } 5091556Srgrimes for (jp = jobtab ; ; jp++) { 5101556Srgrimes if (jp >= jobtab + njobs) { /* no running procs */ 51138536Scracauer in_waitcmd--; 5121556Srgrimes return 0; 5131556Srgrimes } 5141556Srgrimes if (jp->used && jp->state == 0) 5151556Srgrimes break; 5161556Srgrimes } 5171556Srgrimes } 51838521Scracauer } while (dowait(1, (struct job *)NULL) != -1); 51938521Scracauer in_waitcmd--; 52038521Scracauer 52138521Scracauer return 0; 5221556Srgrimes} 5231556Srgrimes 5241556Srgrimes 5251556Srgrimes 52617987Speterint 52790111Simpjobidcmd(int argc __unused, char **argv) 52817987Speter{ 5291556Srgrimes struct job *jp; 5301556Srgrimes int i; 5311556Srgrimes 5321556Srgrimes jp = getjob(argv[1]); 5331556Srgrimes for (i = 0 ; i < jp->nprocs ; ) { 534100308Stjr out1fmt("%d", (int)jp->ps[i].pid); 5351556Srgrimes out1c(++i < jp->nprocs? ' ' : '\n'); 5361556Srgrimes } 5371556Srgrimes return 0; 5381556Srgrimes} 5391556Srgrimes 5401556Srgrimes 5411556Srgrimes 5421556Srgrimes/* 5431556Srgrimes * Convert a job name to a job structure. 5441556Srgrimes */ 5451556Srgrimes 546213811Sobrienstatic struct job * 54790111Simpgetjob(char *name) 54890111Simp{ 5491556Srgrimes int jobno; 55097688Stjr struct job *found, *jp; 551100308Stjr pid_t pid; 5521556Srgrimes int i; 5531556Srgrimes 5541556Srgrimes if (name == NULL) { 5551556Srgrimes#if JOBS 55697659Stjrcurrentjob: if ((jp = getcurjob(NULL)) == NULL) 5571556Srgrimes error("No current job"); 55897659Stjr return (jp); 5591556Srgrimes#else 5601556Srgrimes error("No current job"); 5611556Srgrimes#endif 5621556Srgrimes } else if (name[0] == '%') { 5631556Srgrimes if (is_digit(name[1])) { 5641556Srgrimes jobno = number(name + 1); 5651556Srgrimes if (jobno > 0 && jobno <= njobs 5661556Srgrimes && jobtab[jobno - 1].used != 0) 5671556Srgrimes return &jobtab[jobno - 1]; 5681556Srgrimes#if JOBS 5691556Srgrimes } else if (name[1] == '%' && name[2] == '\0') { 5701556Srgrimes goto currentjob; 57197688Stjr } else if (name[1] == '+' && name[2] == '\0') { 57297688Stjr goto currentjob; 57397688Stjr } else if (name[1] == '-' && name[2] == '\0') { 57497688Stjr if ((jp = getcurjob(NULL)) == NULL || 57597688Stjr (jp = getcurjob(jp)) == NULL) 57697688Stjr error("No previous job"); 57797688Stjr return (jp); 5781556Srgrimes#endif 57997688Stjr } else if (name[1] == '?') { 58097688Stjr found = NULL; 58197688Stjr for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 58297688Stjr if (jp->used && jp->nprocs > 0 58397688Stjr && strstr(jp->ps[0].cmd, name + 2) != NULL) { 58497688Stjr if (found) 58597688Stjr error("%s: ambiguous", name); 58697688Stjr found = jp; 58797688Stjr } 58897688Stjr } 58997688Stjr if (found != NULL) 59097688Stjr return (found); 5911556Srgrimes } else { 59297688Stjr found = NULL; 5931556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 5941556Srgrimes if (jp->used && jp->nprocs > 0 5951556Srgrimes && prefix(name + 1, jp->ps[0].cmd)) { 5961556Srgrimes if (found) 5971556Srgrimes error("%s: ambiguous", name); 5981556Srgrimes found = jp; 5991556Srgrimes } 6001556Srgrimes } 6011556Srgrimes if (found) 6021556Srgrimes return found; 6031556Srgrimes } 6041556Srgrimes } else if (is_number(name)) { 605100308Stjr pid = (pid_t)number(name); 6061556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 6071556Srgrimes if (jp->used && jp->nprocs > 0 6081556Srgrimes && jp->ps[jp->nprocs - 1].pid == pid) 6091556Srgrimes return jp; 6101556Srgrimes } 6111556Srgrimes } 6121556Srgrimes error("No such job: %s", name); 61317987Speter /*NOTREACHED*/ 61417987Speter return NULL; 6151556Srgrimes} 6161556Srgrimes 6171556Srgrimes 6181556Srgrimes 6191556Srgrimes/* 6201556Srgrimes * Return a new job structure, 6211556Srgrimes */ 6221556Srgrimes 6231556Srgrimesstruct job * 62490111Simpmakejob(union node *node __unused, int nprocs) 62517987Speter{ 6261556Srgrimes int i; 6271556Srgrimes struct job *jp; 6281556Srgrimes 6291556Srgrimes for (i = njobs, jp = jobtab ; ; jp++) { 6301556Srgrimes if (--i < 0) { 6311556Srgrimes INTOFF; 6321556Srgrimes if (njobs == 0) { 6331556Srgrimes jobtab = ckmalloc(4 * sizeof jobtab[0]); 63497664Stjr#if JOBS 63597659Stjr jobmru = NULL; 63697664Stjr#endif 6371556Srgrimes } else { 6381556Srgrimes jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); 63917987Speter memcpy(jp, jobtab, njobs * sizeof jp[0]); 64097659Stjr#if JOBS 64197659Stjr /* Relocate `next' pointers and list head */ 64299760Stjr if (jobmru != NULL) 64399760Stjr jobmru = &jp[jobmru - jobtab]; 64497659Stjr for (i = 0; i < njobs; i++) 64597659Stjr if (jp[i].next != NULL) 64697659Stjr jp[i].next = &jp[jp[i].next - 64797659Stjr jobtab]; 64897659Stjr#endif 649209600Sjilles if (bgjob != NULL) 650209600Sjilles bgjob = &jp[bgjob - jobtab]; 65120425Ssteve /* Relocate `ps' pointers */ 65220425Ssteve for (i = 0; i < njobs; i++) 65320425Ssteve if (jp[i].ps == &jobtab[i].ps0) 65420425Ssteve jp[i].ps = &jp[i].ps0; 6551556Srgrimes ckfree(jobtab); 6561556Srgrimes jobtab = jp; 6571556Srgrimes } 6581556Srgrimes jp = jobtab + njobs; 6591556Srgrimes for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0); 6601556Srgrimes INTON; 6611556Srgrimes break; 6621556Srgrimes } 6631556Srgrimes if (jp->used == 0) 6641556Srgrimes break; 6651556Srgrimes } 6661556Srgrimes INTOFF; 6671556Srgrimes jp->state = 0; 6681556Srgrimes jp->used = 1; 6691556Srgrimes jp->changed = 0; 6701556Srgrimes jp->nprocs = 0; 671100305Stjr jp->foreground = 0; 672209600Sjilles jp->remembered = 0; 6731556Srgrimes#if JOBS 6741556Srgrimes jp->jobctl = jobctl; 67597659Stjr jp->next = NULL; 6761556Srgrimes#endif 6771556Srgrimes if (nprocs > 1) { 6781556Srgrimes jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); 6791556Srgrimes } else { 6801556Srgrimes jp->ps = &jp->ps0; 6811556Srgrimes } 6821556Srgrimes INTON; 683213775Sjhb TRACE(("makejob(%p, %d) returns %%%td\n", (void *)node, nprocs, 68417987Speter jp - jobtab + 1)); 6851556Srgrimes return jp; 6868855Srgrimes} 6871556Srgrimes 68897659Stjr#if JOBS 689213811Sobrienstatic void 69097659Stjrsetcurjob(struct job *cj) 69197659Stjr{ 69297659Stjr struct job *jp, *prev; 6931556Srgrimes 69497659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 69597659Stjr if (jp == cj) { 69697659Stjr if (prev != NULL) 69797659Stjr prev->next = jp->next; 69897659Stjr else 69997659Stjr jobmru = jp->next; 70097659Stjr jp->next = jobmru; 70197659Stjr jobmru = cj; 70297659Stjr return; 70397659Stjr } 70497659Stjr } 70597659Stjr cj->next = jobmru; 70697659Stjr jobmru = cj; 70797659Stjr} 70897659Stjr 709213811Sobrienstatic void 71097659Stjrdeljob(struct job *j) 71197659Stjr{ 71297659Stjr struct job *jp, *prev; 71397659Stjr 71497659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 71597659Stjr if (jp == j) { 71697659Stjr if (prev != NULL) 71797659Stjr prev->next = jp->next; 71897659Stjr else 71997659Stjr jobmru = jp->next; 72097659Stjr return; 72197659Stjr } 72297659Stjr } 72397659Stjr} 72497659Stjr 7251556Srgrimes/* 72697659Stjr * Return the most recently used job that isn't `nj', and preferably one 72797659Stjr * that is stopped. 72897659Stjr */ 729213811Sobrienstatic struct job * 73097659Stjrgetcurjob(struct job *nj) 73197659Stjr{ 73297659Stjr struct job *jp; 73397659Stjr 73497659Stjr /* Try to find a stopped one.. */ 73597659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 73697659Stjr if (jp->used && jp != nj && jp->state == JOBSTOPPED) 73797659Stjr return (jp); 73897659Stjr /* Otherwise the most recently used job that isn't `nj' */ 73997659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 74097659Stjr if (jp->used && jp != nj) 74197659Stjr return (jp); 74297659Stjr 74397659Stjr return (NULL); 74497659Stjr} 74597659Stjr 74697659Stjr#endif 74797659Stjr 74897659Stjr/* 7491556Srgrimes * Fork of a subshell. If we are doing job control, give the subshell its 7501556Srgrimes * own process group. Jp is a job structure that the job is to be added to. 7511556Srgrimes * N is the command that will be evaluated by the child. Both jp and n may 7521556Srgrimes * be NULL. The mode parameter can be one of the following: 7531556Srgrimes * FORK_FG - Fork off a foreground process. 7541556Srgrimes * FORK_BG - Fork off a background process. 7551556Srgrimes * FORK_NOJOB - Like FORK_FG, but don't give the process its own 7561556Srgrimes * process group even if job control is on. 7571556Srgrimes * 7581556Srgrimes * When job control is turned off, background processes have their standard 7591556Srgrimes * input redirected to /dev/null (except for the second and later processes 7601556Srgrimes * in a pipeline). 7611556Srgrimes */ 7621556Srgrimes 763100308Stjrpid_t 76490111Simpforkshell(struct job *jp, union node *n, int mode) 76517987Speter{ 766100308Stjr pid_t pid; 767100308Stjr pid_t pgrp; 7681556Srgrimes 769213775Sjhb TRACE(("forkshell(%%%td, %p, %d) called\n", jp - jobtab, (void *)n, 77017987Speter mode)); 7711556Srgrimes INTOFF; 772208489Sjilles if (mode == FORK_BG) 773208489Sjilles checkzombies(); 774112341Stjr flushall(); 7751556Srgrimes pid = fork(); 7761556Srgrimes if (pid == -1) { 7771556Srgrimes TRACE(("Fork failed, errno=%d\n", errno)); 7781556Srgrimes INTON; 77953891Scracauer error("Cannot fork: %s", strerror(errno)); 7801556Srgrimes } 7811556Srgrimes if (pid == 0) { 7821556Srgrimes struct job *p; 7831556Srgrimes int wasroot; 7841556Srgrimes int i; 7851556Srgrimes 786100308Stjr TRACE(("Child shell %d\n", (int)getpid())); 7871556Srgrimes wasroot = rootshell; 7881556Srgrimes rootshell = 0; 789200998Sjilles handler = &main_handler; 7901556Srgrimes closescript(); 7911556Srgrimes INTON; 7921556Srgrimes clear_traps(); 7931556Srgrimes#if JOBS 7941556Srgrimes jobctl = 0; /* do job control only in root shell */ 7951556Srgrimes if (wasroot && mode != FORK_NOJOB && mflag) { 7961556Srgrimes if (jp == NULL || jp->nprocs == 0) 7971556Srgrimes pgrp = getpid(); 7981556Srgrimes else 7991556Srgrimes pgrp = jp->ps[0].pid; 80021352Ssteve if (setpgid(0, pgrp) == 0 && mode == FORK_FG) { 8011556Srgrimes /*** this causes superfluous TIOCSPGRPS ***/ 80299762Stjr if (tcsetpgrp(ttyfd, pgrp) < 0) 80320425Ssteve error("tcsetpgrp failed, errno=%d", errno); 8041556Srgrimes } 8051556Srgrimes setsignal(SIGTSTP); 8061556Srgrimes setsignal(SIGTTOU); 8071556Srgrimes } else if (mode == FORK_BG) { 8081556Srgrimes ignoresig(SIGINT); 8091556Srgrimes ignoresig(SIGQUIT); 8101556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 8111556Srgrimes ! fd0_redirected_p ()) { 8121556Srgrimes close(0); 81369793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 81469793Sobrien error("Can't open %s: %s", 81569793Sobrien _PATH_DEVNULL, strerror(errno)); 8161556Srgrimes } 8171556Srgrimes } 8181556Srgrimes#else 8191556Srgrimes if (mode == FORK_BG) { 8201556Srgrimes ignoresig(SIGINT); 8211556Srgrimes ignoresig(SIGQUIT); 8221556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 8231556Srgrimes ! fd0_redirected_p ()) { 8241556Srgrimes close(0); 82569793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 826155301Sschweikh error("Can't open %s: %s", 82769793Sobrien _PATH_DEVNULL, strerror(errno)); 8281556Srgrimes } 8291556Srgrimes } 8301556Srgrimes#endif 831102051Stjr INTOFF; 832102051Stjr for (i = njobs, p = jobtab ; --i >= 0 ; p++) 833102051Stjr if (p->used) 834102051Stjr freejob(p); 835102051Stjr INTON; 8361556Srgrimes if (wasroot && iflag) { 8371556Srgrimes setsignal(SIGINT); 8381556Srgrimes setsignal(SIGQUIT); 8391556Srgrimes setsignal(SIGTERM); 8401556Srgrimes } 8411556Srgrimes return pid; 8421556Srgrimes } 8431556Srgrimes if (rootshell && mode != FORK_NOJOB && mflag) { 8441556Srgrimes if (jp == NULL || jp->nprocs == 0) 8451556Srgrimes pgrp = pid; 8461556Srgrimes else 8471556Srgrimes pgrp = jp->ps[0].pid; 84817987Speter setpgid(pid, pgrp); 8491556Srgrimes } 850209600Sjilles if (mode == FORK_BG) { 851209600Sjilles if (bgjob != NULL && bgjob->state == JOBDONE && 852209600Sjilles !bgjob->remembered && !iflag) 853209600Sjilles freejob(bgjob); 8541556Srgrimes backgndpid = pid; /* set $! */ 855209600Sjilles bgjob = jp; 856209600Sjilles } 8571556Srgrimes if (jp) { 8581556Srgrimes struct procstat *ps = &jp->ps[jp->nprocs++]; 8591556Srgrimes ps->pid = pid; 8601556Srgrimes ps->status = -1; 8611556Srgrimes ps->cmd = nullstr; 8621556Srgrimes if (iflag && rootshell && n) 8631556Srgrimes ps->cmd = commandtext(n); 864100305Stjr jp->foreground = mode == FORK_FG; 86597659Stjr#if JOBS 86697659Stjr setcurjob(jp); 86797659Stjr#endif 8681556Srgrimes } 8691556Srgrimes INTON; 870100308Stjr TRACE(("In parent shell: child = %d\n", (int)pid)); 8711556Srgrimes return pid; 8721556Srgrimes} 8731556Srgrimes 8741556Srgrimes 8751556Srgrimes 8761556Srgrimes/* 8771556Srgrimes * Wait for job to finish. 8781556Srgrimes * 8791556Srgrimes * Under job control we have the problem that while a child process is 8801556Srgrimes * running interrupts generated by the user are sent to the child but not 8811556Srgrimes * to the shell. This means that an infinite loop started by an inter- 8821556Srgrimes * active user may be hard to kill. With job control turned off, an 8831556Srgrimes * interactive user may place an interactive program inside a loop. If 8841556Srgrimes * the interactive program catches interrupts, the user doesn't want 8851556Srgrimes * these interrupts to also abort the loop. The approach we take here 8861556Srgrimes * is to have the shell ignore interrupt signals while waiting for a 88746684Skris * foreground process to terminate, and then send itself an interrupt 8881556Srgrimes * signal if the child process was terminated by an interrupt signal. 8891556Srgrimes * Unfortunately, some programs want to do a bit of cleanup and then 8901556Srgrimes * exit on interrupt; unless these processes terminate themselves by 8911556Srgrimes * sending a signal to themselves (instead of calling exit) they will 8921556Srgrimes * confuse this approach. 8931556Srgrimes */ 8941556Srgrimes 8951556Srgrimesint 89690111Simpwaitforjob(struct job *jp, int *origstatus) 89745916Scracauer{ 8981556Srgrimes#if JOBS 899100308Stjr pid_t mypgrp = getpgrp(); 900208881Sjilles int propagate_int = jp->jobctl && jp->foreground; 9011556Srgrimes#endif 9021556Srgrimes int status; 9031556Srgrimes int st; 9041556Srgrimes 9051556Srgrimes INTOFF; 906213775Sjhb TRACE(("waitforjob(%%%td) called\n", jp - jobtab + 1)); 90738950Scracauer while (jp->state == 0) 90838950Scracauer if (dowait(1, jp) == -1) 90938950Scracauer dotrap(); 9101556Srgrimes#if JOBS 9111556Srgrimes if (jp->jobctl) { 91299762Stjr if (tcsetpgrp(ttyfd, mypgrp) < 0) 91320425Ssteve error("tcsetpgrp failed, errno=%d\n", errno); 9141556Srgrimes } 9151556Srgrimes if (jp->state == JOBSTOPPED) 91697659Stjr setcurjob(jp); 9171556Srgrimes#endif 9181556Srgrimes status = jp->ps[jp->nprocs - 1].status; 91945916Scracauer if (origstatus != NULL) 92045916Scracauer *origstatus = status; 9211556Srgrimes /* convert to 8 bits */ 92226104Ssteve if (WIFEXITED(status)) 92326104Ssteve st = WEXITSTATUS(status); 9241556Srgrimes#if JOBS 92526104Ssteve else if (WIFSTOPPED(status)) 92626104Ssteve st = WSTOPSIG(status) + 128; 9271556Srgrimes#endif 9281556Srgrimes else 92926104Ssteve st = WTERMSIG(status) + 128; 9301556Srgrimes if (! JOBS || jp->state == JOBDONE) 9311556Srgrimes freejob(jp); 93238521Scracauer if (int_pending()) { 93338521Scracauer if (WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) 93438521Scracauer kill(getpid(), SIGINT); 93538521Scracauer else 93638521Scracauer CLEAR_PENDING_INT; 93738521Scracauer } 938208881Sjilles#if JOBS 939208881Sjilles else if (rootshell && iflag && propagate_int && 940208881Sjilles WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) 941208881Sjilles kill(getpid(), SIGINT); 942208881Sjilles#endif 9431556Srgrimes INTON; 9441556Srgrimes return st; 9451556Srgrimes} 9461556Srgrimes 9471556Srgrimes 9481556Srgrimes 9491556Srgrimes/* 9501556Srgrimes * Wait for a process to terminate. 9511556Srgrimes */ 9521556Srgrimes 953213811Sobrienstatic pid_t 95490111Simpdowait(int block, struct job *job) 95517987Speter{ 956100308Stjr pid_t pid; 9571556Srgrimes int status; 9581556Srgrimes struct procstat *sp; 9591556Srgrimes struct job *jp; 9601556Srgrimes struct job *thisjob; 9611556Srgrimes int done; 9621556Srgrimes int stopped; 96326104Ssteve int sig; 964100305Stjr int i; 9651556Srgrimes 96638950Scracauer in_dowait++; 9671556Srgrimes TRACE(("dowait(%d) called\n", block)); 9681556Srgrimes do { 9691556Srgrimes pid = waitproc(block, &status); 970100308Stjr TRACE(("wait returns %d, status=%d\n", (int)pid, status)); 97172086Scracauer } while ((pid == -1 && errno == EINTR && breakwaitcmd == 0) || 972125501Scracauer (pid > 0 && WIFSTOPPED(status) && !iflag)); 97338950Scracauer in_dowait--; 974153417Smaxim if (pid == -1 && errno == ECHILD && job != NULL) 975153417Smaxim job->state = JOBDONE; 97638521Scracauer if (breakwaitcmd != 0) { 97738521Scracauer breakwaitcmd = 0; 978138312Smaxim if (pid <= 0) 979138312Smaxim return -1; 98038521Scracauer } 9811556Srgrimes if (pid <= 0) 9821556Srgrimes return pid; 9831556Srgrimes INTOFF; 9841556Srgrimes thisjob = NULL; 9851556Srgrimes for (jp = jobtab ; jp < jobtab + njobs ; jp++) { 9861556Srgrimes if (jp->used) { 9871556Srgrimes done = 1; 9881556Srgrimes stopped = 1; 9891556Srgrimes for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { 9901556Srgrimes if (sp->pid == -1) 9911556Srgrimes continue; 9921556Srgrimes if (sp->pid == pid) { 99326104Ssteve TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", 994100308Stjr (int)pid, sp->status, 995100308Stjr status)); 9961556Srgrimes sp->status = status; 9971556Srgrimes thisjob = jp; 9981556Srgrimes } 9991556Srgrimes if (sp->status == -1) 10001556Srgrimes stopped = 0; 100126104Ssteve else if (WIFSTOPPED(sp->status)) 10021556Srgrimes done = 0; 10031556Srgrimes } 10041556Srgrimes if (stopped) { /* stopped or done */ 10051556Srgrimes int state = done? JOBDONE : JOBSTOPPED; 10061556Srgrimes if (jp->state != state) { 1007213775Sjhb TRACE(("Job %td: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); 10081556Srgrimes jp->state = state; 1009209600Sjilles if (jp != job) { 1010209600Sjilles if (done && !jp->remembered && 1011209600Sjilles !iflag && jp != bgjob) 1012209600Sjilles freejob(jp); 10131556Srgrimes#if JOBS 1014209600Sjilles else if (done) 1015209600Sjilles deljob(jp); 10161556Srgrimes#endif 1017209600Sjilles } 10181556Srgrimes } 10191556Srgrimes } 10201556Srgrimes } 10211556Srgrimes } 10221556Srgrimes INTON; 10231556Srgrimes if (! rootshell || ! iflag || (job && thisjob == job)) { 10241556Srgrimes#if JOBS 102526104Ssteve if (WIFSTOPPED(status)) 102626104Ssteve sig = WSTOPSIG(status); 102726104Ssteve else 10281556Srgrimes#endif 102997663Stjr { 103026104Ssteve if (WIFEXITED(status)) 103126104Ssteve sig = 0; 103226104Ssteve else 103326104Ssteve sig = WTERMSIG(status); 10341556Srgrimes } 1035100305Stjr if (sig != 0 && sig != SIGINT && sig != SIGPIPE) { 1036107846Stjr if (!mflag || 1037107846Stjr (thisjob->foreground && !WIFSTOPPED(status))) { 1038102007Stjr i = WTERMSIG(status); 1039125155Snjl if ((i & 0x7F) < sys_nsig && sys_siglist[i & 0x7F]) 1040100305Stjr out1str(sys_siglist[i & 0x7F]); 1041100305Stjr else 1042100305Stjr out1fmt("Signal %d", i & 0x7F); 1043100305Stjr if (WCOREDUMP(status)) 1044100305Stjr out1str(" (core dumped)"); 1045100305Stjr out1c('\n'); 1046100305Stjr } else 1047163085Sstefanf showjob(thisjob, pid, SHOWJOBS_DEFAULT); 1048100305Stjr } 10491556Srgrimes } else { 1050109627Stjr TRACE(("Not printing status, rootshell=%d, job=%p\n", rootshell, job)); 10511556Srgrimes if (thisjob) 10521556Srgrimes thisjob->changed = 1; 10531556Srgrimes } 10541556Srgrimes return pid; 10551556Srgrimes} 10561556Srgrimes 10571556Srgrimes 10581556Srgrimes 10591556Srgrimes/* 10601556Srgrimes * Do a wait system call. If job control is compiled in, we accept 10611556Srgrimes * stopped processes. If block is zero, we return a value of zero 10621556Srgrimes * rather than blocking. 10631556Srgrimes */ 1064213811Sobrienstatic pid_t 106590111Simpwaitproc(int block, int *status) 106617987Speter{ 10671556Srgrimes int flags; 10681556Srgrimes 10691556Srgrimes#if JOBS 10701556Srgrimes flags = WUNTRACED; 10711556Srgrimes#else 10721556Srgrimes flags = 0; 10731556Srgrimes#endif 10741556Srgrimes if (block == 0) 10751556Srgrimes flags |= WNOHANG; 10761556Srgrimes return wait3(status, flags, (struct rusage *)NULL); 10771556Srgrimes} 10781556Srgrimes 10791556Srgrimes/* 10801556Srgrimes * return 1 if there are stopped jobs, otherwise 0 10811556Srgrimes */ 10821556Srgrimesint job_warning = 0; 10831556Srgrimesint 108490111Simpstoppedjobs(void) 10851556Srgrimes{ 108625222Ssteve int jobno; 108725222Ssteve struct job *jp; 10881556Srgrimes 10891556Srgrimes if (job_warning) 10901556Srgrimes return (0); 10911556Srgrimes for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { 10921556Srgrimes if (jp->used == 0) 10931556Srgrimes continue; 10941556Srgrimes if (jp->state == JOBSTOPPED) { 1095199629Sjilles out2fmt_flush("You have stopped jobs.\n"); 10961556Srgrimes job_warning = 2; 10971556Srgrimes return (1); 10981556Srgrimes } 10991556Srgrimes } 11001556Srgrimes 11011556Srgrimes return (0); 11021556Srgrimes} 11031556Srgrimes 1104208489Sjilles 1105213811Sobrienstatic void 1106208489Sjillescheckzombies(void) 1107208489Sjilles{ 1108208489Sjilles while (njobs > 0 && dowait(0, NULL) > 0) 1109208489Sjilles ; 1110208489Sjilles} 1111208489Sjilles 1112208489Sjilles 1113209600Sjillesint 1114209600Sjillesbackgndpidset(void) 1115209600Sjilles{ 1116209600Sjilles return backgndpid != -1; 1117209600Sjilles} 1118209600Sjilles 1119209600Sjilles 1120209600Sjillespid_t 1121209600Sjillesbackgndpidval(void) 1122209600Sjilles{ 1123209600Sjilles if (bgjob != NULL) 1124209600Sjilles bgjob->remembered = 1; 1125209600Sjilles return backgndpid; 1126209600Sjilles} 1127209600Sjilles 11281556Srgrimes/* 11291556Srgrimes * Return a string identifying a command (to be printed by the 11301556Srgrimes * jobs command. 11311556Srgrimes */ 11321556Srgrimes 1133213760Sobrienstatic char *cmdnextc; 1134213760Sobrienstatic int cmdnleft; 11351556Srgrimes#define MAXCMDTEXT 200 11361556Srgrimes 11371556Srgrimeschar * 113890111Simpcommandtext(union node *n) 113990111Simp{ 11401556Srgrimes char *name; 11411556Srgrimes 11421556Srgrimes cmdnextc = name = ckmalloc(MAXCMDTEXT); 11431556Srgrimes cmdnleft = MAXCMDTEXT - 4; 11441556Srgrimes cmdtxt(n); 11451556Srgrimes *cmdnextc = '\0'; 11461556Srgrimes return name; 11471556Srgrimes} 11481556Srgrimes 11491556Srgrimes 1150213811Sobrienstatic void 115190111Simpcmdtxt(union node *n) 115290111Simp{ 11531556Srgrimes union node *np; 11541556Srgrimes struct nodelist *lp; 1155201053Sjilles const char *p; 11561556Srgrimes int i; 11571556Srgrimes char s[2]; 11581556Srgrimes 11591556Srgrimes if (n == NULL) 11601556Srgrimes return; 11611556Srgrimes switch (n->type) { 11621556Srgrimes case NSEMI: 11631556Srgrimes cmdtxt(n->nbinary.ch1); 11641556Srgrimes cmdputs("; "); 11651556Srgrimes cmdtxt(n->nbinary.ch2); 11661556Srgrimes break; 11671556Srgrimes case NAND: 11681556Srgrimes cmdtxt(n->nbinary.ch1); 11691556Srgrimes cmdputs(" && "); 11701556Srgrimes cmdtxt(n->nbinary.ch2); 11711556Srgrimes break; 11721556Srgrimes case NOR: 11731556Srgrimes cmdtxt(n->nbinary.ch1); 11741556Srgrimes cmdputs(" || "); 11751556Srgrimes cmdtxt(n->nbinary.ch2); 11761556Srgrimes break; 11771556Srgrimes case NPIPE: 11781556Srgrimes for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 11791556Srgrimes cmdtxt(lp->n); 11801556Srgrimes if (lp->next) 11811556Srgrimes cmdputs(" | "); 11821556Srgrimes } 11831556Srgrimes break; 11841556Srgrimes case NSUBSHELL: 11851556Srgrimes cmdputs("("); 11861556Srgrimes cmdtxt(n->nredir.n); 11871556Srgrimes cmdputs(")"); 11881556Srgrimes break; 11891556Srgrimes case NREDIR: 11901556Srgrimes case NBACKGND: 11911556Srgrimes cmdtxt(n->nredir.n); 11921556Srgrimes break; 11931556Srgrimes case NIF: 11941556Srgrimes cmdputs("if "); 11951556Srgrimes cmdtxt(n->nif.test); 11961556Srgrimes cmdputs("; then "); 11971556Srgrimes cmdtxt(n->nif.ifpart); 11981556Srgrimes cmdputs("..."); 11991556Srgrimes break; 12001556Srgrimes case NWHILE: 12011556Srgrimes cmdputs("while "); 12021556Srgrimes goto until; 12031556Srgrimes case NUNTIL: 12041556Srgrimes cmdputs("until "); 12051556Srgrimesuntil: 12061556Srgrimes cmdtxt(n->nbinary.ch1); 12071556Srgrimes cmdputs("; do "); 12081556Srgrimes cmdtxt(n->nbinary.ch2); 12091556Srgrimes cmdputs("; done"); 12101556Srgrimes break; 12111556Srgrimes case NFOR: 12121556Srgrimes cmdputs("for "); 12131556Srgrimes cmdputs(n->nfor.var); 12141556Srgrimes cmdputs(" in ..."); 12151556Srgrimes break; 12161556Srgrimes case NCASE: 12171556Srgrimes cmdputs("case "); 12181556Srgrimes cmdputs(n->ncase.expr->narg.text); 12191556Srgrimes cmdputs(" in ..."); 12201556Srgrimes break; 12211556Srgrimes case NDEFUN: 12221556Srgrimes cmdputs(n->narg.text); 12231556Srgrimes cmdputs("() ..."); 12241556Srgrimes break; 12251556Srgrimes case NCMD: 12261556Srgrimes for (np = n->ncmd.args ; np ; np = np->narg.next) { 12271556Srgrimes cmdtxt(np); 12281556Srgrimes if (np->narg.next) 12291556Srgrimes cmdputs(" "); 12301556Srgrimes } 12311556Srgrimes for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { 12321556Srgrimes cmdputs(" "); 12331556Srgrimes cmdtxt(np); 12341556Srgrimes } 12351556Srgrimes break; 12361556Srgrimes case NARG: 12371556Srgrimes cmdputs(n->narg.text); 12381556Srgrimes break; 12391556Srgrimes case NTO: 12401556Srgrimes p = ">"; i = 1; goto redir; 12411556Srgrimes case NAPPEND: 12421556Srgrimes p = ">>"; i = 1; goto redir; 12431556Srgrimes case NTOFD: 12441556Srgrimes p = ">&"; i = 1; goto redir; 124596922Stjr case NCLOBBER: 124696922Stjr p = ">|"; i = 1; goto redir; 12471556Srgrimes case NFROM: 12481556Srgrimes p = "<"; i = 0; goto redir; 124966612Sbrian case NFROMTO: 125066612Sbrian p = "<>"; i = 0; goto redir; 12511556Srgrimes case NFROMFD: 12521556Srgrimes p = "<&"; i = 0; goto redir; 12531556Srgrimesredir: 12541556Srgrimes if (n->nfile.fd != i) { 12551556Srgrimes s[0] = n->nfile.fd + '0'; 12561556Srgrimes s[1] = '\0'; 12571556Srgrimes cmdputs(s); 12581556Srgrimes } 12591556Srgrimes cmdputs(p); 12601556Srgrimes if (n->type == NTOFD || n->type == NFROMFD) { 126199634Stjr if (n->ndup.dupfd >= 0) 126299634Stjr s[0] = n->ndup.dupfd + '0'; 126399634Stjr else 126499634Stjr s[0] = '-'; 12651556Srgrimes s[1] = '\0'; 12661556Srgrimes cmdputs(s); 12671556Srgrimes } else { 12681556Srgrimes cmdtxt(n->nfile.fname); 12691556Srgrimes } 12701556Srgrimes break; 12711556Srgrimes case NHERE: 12721556Srgrimes case NXHERE: 12731556Srgrimes cmdputs("<<..."); 12741556Srgrimes break; 12751556Srgrimes default: 12761556Srgrimes cmdputs("???"); 12771556Srgrimes break; 12781556Srgrimes } 12791556Srgrimes} 12801556Srgrimes 12811556Srgrimes 12821556Srgrimes 1283213811Sobrienstatic void 1284201053Sjillescmdputs(const char *s) 128590111Simp{ 1286201053Sjilles const char *p; 1287201053Sjilles char *q; 128825222Ssteve char c; 12891556Srgrimes int subtype = 0; 12901556Srgrimes 12911556Srgrimes if (cmdnleft <= 0) 12921556Srgrimes return; 12931556Srgrimes p = s; 12941556Srgrimes q = cmdnextc; 12951556Srgrimes while ((c = *p++) != '\0') { 12961556Srgrimes if (c == CTLESC) 12971556Srgrimes *q++ = *p++; 12981556Srgrimes else if (c == CTLVAR) { 12991556Srgrimes *q++ = '$'; 13001556Srgrimes if (--cmdnleft > 0) 13011556Srgrimes *q++ = '{'; 13021556Srgrimes subtype = *p++; 13031556Srgrimes } else if (c == '=' && subtype != 0) { 13041556Srgrimes *q++ = "}-+?="[(subtype & VSTYPE) - VSNORMAL]; 13051556Srgrimes subtype = 0; 13061556Srgrimes } else if (c == CTLENDVAR) { 13071556Srgrimes *q++ = '}'; 130818954Ssteve } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) 13091556Srgrimes cmdnleft++; /* ignore it */ 13101556Srgrimes else 13111556Srgrimes *q++ = c; 13121556Srgrimes if (--cmdnleft <= 0) { 13131556Srgrimes *q++ = '.'; 13141556Srgrimes *q++ = '.'; 13151556Srgrimes *q++ = '.'; 13161556Srgrimes break; 13171556Srgrimes } 13181556Srgrimes } 13191556Srgrimes cmdnextc = q; 13201556Srgrimes} 1321