jobs.c revision 218105
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 218105 2011-01-30 22:57:52Z jilles $"); 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" 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 103216217Sjillesstatic void printjobcmd(struct job *); 104216217Sjillesstatic void showjob(struct job *, int); 1051556Srgrimes 1061556Srgrimes 1071556Srgrimes/* 1081556Srgrimes * Turn job control on and off. 1091556Srgrimes */ 1101556Srgrimes 1111556SrgrimesMKINIT int jobctl; 1121556Srgrimes 11320425Ssteve#if JOBS 1141556Srgrimesvoid 11590111Simpsetjobctl(int on) 11617987Speter{ 11799762Stjr int i; 1181556Srgrimes 1191556Srgrimes if (on == jobctl || rootshell == 0) 1201556Srgrimes return; 1211556Srgrimes if (on) { 12299762Stjr if (ttyfd != -1) 12399762Stjr close(ttyfd); 12499762Stjr if ((ttyfd = open(_PATH_TTY, O_RDWR)) < 0) { 12599762Stjr i = 0; 12699762Stjr while (i <= 2 && !isatty(i)) 12799762Stjr i++; 128109927Stjr if (i > 2 || (ttyfd = fcntl(i, F_DUPFD, 10)) < 0) 12999762Stjr goto out; 13099762Stjr } 131109927Stjr if (ttyfd < 10) { 132109927Stjr /* 133109927Stjr * Keep our TTY file descriptor out of the way of 134109927Stjr * the user's redirections. 135109927Stjr */ 136109927Stjr if ((i = fcntl(ttyfd, F_DUPFD, 10)) < 0) { 137109927Stjr close(ttyfd); 138109927Stjr ttyfd = -1; 139109927Stjr goto out; 140109927Stjr } 141109927Stjr close(ttyfd); 142109927Stjr ttyfd = i; 143109927Stjr } 144103223Snectar if (fcntl(ttyfd, F_SETFD, FD_CLOEXEC) < 0) { 14599762Stjr close(ttyfd); 14699762Stjr ttyfd = -1; 14799762Stjr goto out; 14899762Stjr } 1491556Srgrimes do { /* while we are in the background */ 15099762Stjr initialpgrp = tcgetpgrp(ttyfd); 15120425Ssteve if (initialpgrp < 0) { 152199629Sjillesout: out2fmt_flush("sh: can't access tty; job control turned off\n"); 1531556Srgrimes mflag = 0; 1541556Srgrimes return; 1551556Srgrimes } 156216400Sjilles if (initialpgrp != getpgrp()) { 157216400Sjilles kill(0, SIGTTIN); 1581556Srgrimes continue; 1591556Srgrimes } 1601556Srgrimes } while (0); 1611556Srgrimes setsignal(SIGTSTP); 1621556Srgrimes setsignal(SIGTTOU); 1631556Srgrimes setsignal(SIGTTIN); 16417987Speter setpgid(0, rootpid); 16599762Stjr tcsetpgrp(ttyfd, rootpid); 1661556Srgrimes } else { /* turning job control off */ 16717987Speter setpgid(0, initialpgrp); 16899762Stjr tcsetpgrp(ttyfd, initialpgrp); 16999762Stjr close(ttyfd); 17099762Stjr ttyfd = -1; 1711556Srgrimes setsignal(SIGTSTP); 1721556Srgrimes setsignal(SIGTTOU); 1731556Srgrimes setsignal(SIGTTIN); 1741556Srgrimes } 1751556Srgrimes jobctl = on; 1761556Srgrimes} 17720425Ssteve#endif 1781556Srgrimes 1791556Srgrimes 1801556Srgrimes#ifdef mkinit 18128346SsteveINCLUDE <sys/types.h> 18217987SpeterINCLUDE <stdlib.h> 1831556Srgrimes 1841556SrgrimesSHELLPROC { 1851556Srgrimes backgndpid = -1; 186209600Sjilles bgjob = NULL; 1871556Srgrimes#if JOBS 1881556Srgrimes jobctl = 0; 1891556Srgrimes#endif 1901556Srgrimes} 1911556Srgrimes 1921556Srgrimes#endif 1931556Srgrimes 1941556Srgrimes 1951556Srgrimes 1961556Srgrimes#if JOBS 19717987Speterint 19890111Simpfgcmd(int argc __unused, char **argv) 19917987Speter{ 2001556Srgrimes struct job *jp; 201100308Stjr pid_t pgrp; 2021556Srgrimes int status; 2031556Srgrimes 2041556Srgrimes jp = getjob(argv[1]); 2051556Srgrimes if (jp->jobctl == 0) 2061556Srgrimes error("job not created under job control"); 207216217Sjilles printjobcmd(jp); 20896933Stjr flushout(&output); 2091556Srgrimes pgrp = jp->ps[0].pid; 21099762Stjr tcsetpgrp(ttyfd, pgrp); 2111556Srgrimes restartjob(jp); 212100305Stjr jp->foreground = 1; 2131556Srgrimes INTOFF; 21445916Scracauer status = waitforjob(jp, (int *)NULL); 2151556Srgrimes INTON; 2161556Srgrimes return status; 2171556Srgrimes} 2181556Srgrimes 2191556Srgrimes 22017987Speterint 22190111Simpbgcmd(int argc, char **argv) 22217987Speter{ 2231556Srgrimes struct job *jp; 2241556Srgrimes 2251556Srgrimes do { 2261556Srgrimes jp = getjob(*++argv); 2271556Srgrimes if (jp->jobctl == 0) 2281556Srgrimes error("job not created under job control"); 22996933Stjr if (jp->state == JOBDONE) 23096933Stjr continue; 2311556Srgrimes restartjob(jp); 232100305Stjr jp->foreground = 0; 233216400Sjilles out1fmt("[%td] ", jp - jobtab + 1); 234216217Sjilles printjobcmd(jp); 2351556Srgrimes } while (--argc > 1); 2361556Srgrimes return 0; 2371556Srgrimes} 2381556Srgrimes 2391556Srgrimes 240213811Sobrienstatic void 24190111Simprestartjob(struct job *jp) 24217987Speter{ 2431556Srgrimes struct procstat *ps; 2441556Srgrimes int i; 2451556Srgrimes 2461556Srgrimes if (jp->state == JOBDONE) 2471556Srgrimes return; 24897660Stjr setcurjob(jp); 2491556Srgrimes INTOFF; 250216400Sjilles kill(-jp->ps[0].pid, SIGCONT); 2511556Srgrimes for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 25226104Ssteve if (WIFSTOPPED(ps->status)) { 2531556Srgrimes ps->status = -1; 2541556Srgrimes jp->state = 0; 2551556Srgrimes } 2561556Srgrimes } 2571556Srgrimes INTON; 2581556Srgrimes} 2591556Srgrimes#endif 2601556Srgrimes 2611556Srgrimes 2621556Srgrimesint 26397669Stjrjobscmd(int argc, char *argv[]) 26417987Speter{ 26597669Stjr char *id; 266163085Sstefanf int ch, mode; 26797669Stjr 26897669Stjr optind = optreset = 1; 269100663Stjr opterr = 0; 270163085Sstefanf mode = SHOWJOBS_DEFAULT; 271163085Sstefanf while ((ch = getopt(argc, argv, "lps")) != -1) { 27297669Stjr switch (ch) { 27397669Stjr case 'l': 274163085Sstefanf mode = SHOWJOBS_VERBOSE; 27597669Stjr break; 276163085Sstefanf case 'p': 277163085Sstefanf mode = SHOWJOBS_PGIDS; 278163085Sstefanf break; 27997669Stjr case 's': 280163085Sstefanf mode = SHOWJOBS_PIDS; 28197669Stjr break; 28297669Stjr case '?': 28397669Stjr default: 28497669Stjr error("unknown option: -%c", optopt); 28597669Stjr } 28697669Stjr } 28797669Stjr argc -= optind; 28897669Stjr argv += optind; 28997669Stjr 29097669Stjr if (argc == 0) 291163085Sstefanf showjobs(0, mode); 29297669Stjr else 29397669Stjr while ((id = *argv++) != NULL) 294216217Sjilles showjob(getjob(id), mode); 29597669Stjr 29697669Stjr return (0); 2971556Srgrimes} 2981556Srgrimes 299213811Sobrienstatic void 300216217Sjillesprintjobcmd(struct job *jp) 30197663Stjr{ 302216217Sjilles struct procstat *ps; 303216217Sjilles int i; 304216217Sjilles 305216217Sjilles for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 306216217Sjilles out1str(ps->cmd); 307216217Sjilles if (i > 0) 308216217Sjilles out1str(" | "); 309216217Sjilles } 310216217Sjilles out1c('\n'); 311216217Sjilles} 312216217Sjilles 313216217Sjillesstatic void 314216217Sjillesshowjob(struct job *jp, int mode) 315216217Sjilles{ 31697663Stjr char s[64]; 317216217Sjilles char statestr[64]; 31897663Stjr struct procstat *ps; 31997669Stjr struct job *j; 32097669Stjr int col, curr, i, jobno, prev, procno; 32197669Stjr char c; 3221556Srgrimes 323163085Sstefanf procno = (mode == SHOWJOBS_PGIDS) ? 1 : jp->nprocs; 32497663Stjr jobno = jp - jobtab + 1; 32597669Stjr curr = prev = 0; 32697669Stjr#if JOBS 32797669Stjr if ((j = getcurjob(NULL)) != NULL) { 32897669Stjr curr = j - jobtab + 1; 32997669Stjr if ((j = getcurjob(j)) != NULL) 33097669Stjr prev = j - jobtab + 1; 33197669Stjr } 33297669Stjr#endif 333216217Sjilles ps = jp->ps + jp->nprocs - 1; 334216217Sjilles if (jp->state == 0) { 335216217Sjilles strcpy(statestr, "Running"); 336216217Sjilles#if JOBS 337216217Sjilles } else if (jp->state == JOBSTOPPED) { 338216217Sjilles while (!WIFSTOPPED(ps->status) && ps > jp->ps) 339216217Sjilles ps--; 340216217Sjilles if (WIFSTOPPED(ps->status)) 341216217Sjilles i = WSTOPSIG(ps->status); 342216217Sjilles else 343216217Sjilles i = -1; 344216217Sjilles if (i > 0 && i < sys_nsig && sys_siglist[i]) 345216217Sjilles strcpy(statestr, sys_siglist[i]); 346216217Sjilles else 347216217Sjilles strcpy(statestr, "Suspended"); 348216217Sjilles#endif 349216217Sjilles } else if (WIFEXITED(ps->status)) { 350216217Sjilles if (WEXITSTATUS(ps->status) == 0) 351216217Sjilles strcpy(statestr, "Done"); 352216217Sjilles else 353216220Sjilles fmtstr(statestr, 64, "Done(%d)", 354216217Sjilles WEXITSTATUS(ps->status)); 355216217Sjilles } else { 356216217Sjilles i = WTERMSIG(ps->status); 357216217Sjilles if (i > 0 && i < sys_nsig && sys_siglist[i]) 358216217Sjilles strcpy(statestr, sys_siglist[i]); 359216217Sjilles else 360216217Sjilles fmtstr(statestr, 64, "Signal %d", i); 361216217Sjilles if (WCOREDUMP(ps->status)) 362216217Sjilles strcat(statestr, " (core dumped)"); 363216217Sjilles } 364216217Sjilles 36597663Stjr for (ps = jp->ps ; ; ps++) { /* for each process */ 366163085Sstefanf if (mode == SHOWJOBS_PIDS || mode == SHOWJOBS_PGIDS) { 367216199Sjilles out1fmt("%d\n", (int)ps->pid); 36897669Stjr goto skip; 36997669Stjr } 370216217Sjilles if (mode != SHOWJOBS_VERBOSE && ps != jp->ps) 37197669Stjr goto skip; 37297819Stjr if (jobno == curr && ps == jp->ps) 37397669Stjr c = '+'; 37497819Stjr else if (jobno == prev && ps == jp->ps) 37597669Stjr c = '-'; 37697669Stjr else 37797669Stjr c = ' '; 37897663Stjr if (ps == jp->ps) 37997669Stjr fmtstr(s, 64, "[%d] %c ", jobno, c); 38097663Stjr else 38197816Stjr fmtstr(s, 64, " %c ", c); 38297663Stjr out1str(s); 38397663Stjr col = strlen(s); 384163085Sstefanf if (mode == SHOWJOBS_VERBOSE) { 385100308Stjr fmtstr(s, 64, "%d ", (int)ps->pid); 38697669Stjr out1str(s); 38797669Stjr col += strlen(s); 38897669Stjr } 389216217Sjilles if (ps == jp->ps) { 390216217Sjilles out1str(statestr); 391216217Sjilles col += strlen(statestr); 39297663Stjr } 39397663Stjr do { 39497663Stjr out1c(' '); 39597663Stjr col++; 39697663Stjr } while (col < 30); 397216217Sjilles if (mode == SHOWJOBS_VERBOSE) { 398216217Sjilles out1str(ps->cmd); 399216217Sjilles out1c('\n'); 400216217Sjilles } else 401216217Sjilles printjobcmd(jp); 40297669Stjrskip: if (--procno <= 0) 40397663Stjr break; 40497663Stjr } 40597663Stjr} 40697663Stjr 4071556Srgrimes/* 4081556Srgrimes * Print a list of jobs. If "change" is nonzero, only print jobs whose 4091556Srgrimes * statuses have changed since the last call to showjobs. 4101556Srgrimes * 4111556Srgrimes * If the shell is interrupted in the process of creating a job, the 4121556Srgrimes * result may be a job structure containing zero processes. Such structures 4131556Srgrimes * will be freed here. 4141556Srgrimes */ 4151556Srgrimes 4161556Srgrimesvoid 417163085Sstefanfshowjobs(int change, int mode) 41817987Speter{ 4191556Srgrimes int jobno; 4201556Srgrimes struct job *jp; 4211556Srgrimes 4221556Srgrimes TRACE(("showjobs(%d) called\n", change)); 423208489Sjilles checkzombies(); 4241556Srgrimes for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) { 4251556Srgrimes if (! jp->used) 4261556Srgrimes continue; 4271556Srgrimes if (jp->nprocs == 0) { 4281556Srgrimes freejob(jp); 4291556Srgrimes continue; 4301556Srgrimes } 4311556Srgrimes if (change && ! jp->changed) 4321556Srgrimes continue; 433216217Sjilles showjob(jp, mode); 4341556Srgrimes jp->changed = 0; 435209600Sjilles /* Hack: discard jobs for which $! has not been referenced 436209600Sjilles * in interactive mode when they terminate. 437209600Sjilles */ 438209600Sjilles if (jp->state == JOBDONE && !jp->remembered && 439209600Sjilles (iflag || jp != bgjob)) { 4401556Srgrimes freejob(jp); 4411556Srgrimes } 4421556Srgrimes } 4431556Srgrimes} 4441556Srgrimes 4451556Srgrimes 4461556Srgrimes/* 4471556Srgrimes * Mark a job structure as unused. 4481556Srgrimes */ 4491556Srgrimes 450213811Sobrienstatic void 45190111Simpfreejob(struct job *jp) 45290111Simp{ 4531556Srgrimes struct procstat *ps; 4541556Srgrimes int i; 4551556Srgrimes 4561556Srgrimes INTOFF; 457209600Sjilles if (bgjob == jp) 458209600Sjilles bgjob = NULL; 4591556Srgrimes for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { 4601556Srgrimes if (ps->cmd != nullstr) 4611556Srgrimes ckfree(ps->cmd); 4621556Srgrimes } 4631556Srgrimes if (jp->ps != &jp->ps0) 4641556Srgrimes ckfree(jp->ps); 4651556Srgrimes jp->used = 0; 4661556Srgrimes#if JOBS 46797659Stjr deljob(jp); 4681556Srgrimes#endif 4691556Srgrimes INTON; 4701556Srgrimes} 4711556Srgrimes 4721556Srgrimes 4731556Srgrimes 4741556Srgrimesint 47590111Simpwaitcmd(int argc, char **argv) 47617987Speter{ 4771556Srgrimes struct job *job; 47826104Ssteve int status, retval; 4791556Srgrimes struct job *jp; 4801556Srgrimes 4811556Srgrimes if (argc > 1) { 4821556Srgrimes job = getjob(argv[1]); 4831556Srgrimes } else { 4841556Srgrimes job = NULL; 4851556Srgrimes } 48638536Scracauer 48738536Scracauer /* 48838536Scracauer * Loop until a process is terminated or stopped, or a SIGINT is 48938536Scracauer * received. 49038536Scracauer */ 49138536Scracauer 49238521Scracauer in_waitcmd++; 49338536Scracauer do { 4941556Srgrimes if (job != NULL) { 4951556Srgrimes if (job->state) { 4961556Srgrimes status = job->ps[job->nprocs - 1].status; 49726104Ssteve if (WIFEXITED(status)) 49826104Ssteve retval = WEXITSTATUS(status); 4991556Srgrimes#if JOBS 50026104Ssteve else if (WIFSTOPPED(status)) 50126104Ssteve retval = WSTOPSIG(status) + 128; 5021556Srgrimes#endif 5031556Srgrimes else 50426104Ssteve retval = WTERMSIG(status) + 128; 505209600Sjilles if (! iflag || ! job->changed) 5061556Srgrimes freejob(job); 507209600Sjilles else { 508209600Sjilles job->remembered = 0; 509209600Sjilles if (job == bgjob) 510209600Sjilles bgjob = NULL; 511209600Sjilles } 51238536Scracauer in_waitcmd--; 51326104Ssteve return retval; 5141556Srgrimes } 5151556Srgrimes } else { 516209600Sjilles for (jp = jobtab ; jp < jobtab + njobs; jp++) 517209600Sjilles if (jp->used && jp->state == JOBDONE) { 518209600Sjilles if (! iflag || ! jp->changed) 519209600Sjilles freejob(jp); 520209600Sjilles else { 521209600Sjilles jp->remembered = 0; 522209600Sjilles if (jp == bgjob) 523209600Sjilles bgjob = NULL; 524209600Sjilles } 525209600Sjilles } 5261556Srgrimes for (jp = jobtab ; ; jp++) { 5271556Srgrimes if (jp >= jobtab + njobs) { /* no running procs */ 52838536Scracauer in_waitcmd--; 5291556Srgrimes return 0; 5301556Srgrimes } 5311556Srgrimes if (jp->used && jp->state == 0) 5321556Srgrimes break; 5331556Srgrimes } 5341556Srgrimes } 53538521Scracauer } while (dowait(1, (struct job *)NULL) != -1); 53638521Scracauer in_waitcmd--; 53738521Scracauer 53838521Scracauer return 0; 5391556Srgrimes} 5401556Srgrimes 5411556Srgrimes 5421556Srgrimes 54317987Speterint 54490111Simpjobidcmd(int argc __unused, char **argv) 54517987Speter{ 5461556Srgrimes struct job *jp; 5471556Srgrimes int i; 5481556Srgrimes 5491556Srgrimes jp = getjob(argv[1]); 5501556Srgrimes for (i = 0 ; i < jp->nprocs ; ) { 551100308Stjr out1fmt("%d", (int)jp->ps[i].pid); 5521556Srgrimes out1c(++i < jp->nprocs? ' ' : '\n'); 5531556Srgrimes } 5541556Srgrimes return 0; 5551556Srgrimes} 5561556Srgrimes 5571556Srgrimes 5581556Srgrimes 5591556Srgrimes/* 5601556Srgrimes * Convert a job name to a job structure. 5611556Srgrimes */ 5621556Srgrimes 563213811Sobrienstatic struct job * 56490111Simpgetjob(char *name) 56590111Simp{ 5661556Srgrimes int jobno; 56797688Stjr struct job *found, *jp; 568100308Stjr pid_t pid; 5691556Srgrimes int i; 5701556Srgrimes 5711556Srgrimes if (name == NULL) { 5721556Srgrimes#if JOBS 57397659Stjrcurrentjob: if ((jp = getcurjob(NULL)) == NULL) 5741556Srgrimes error("No current job"); 57597659Stjr return (jp); 5761556Srgrimes#else 5771556Srgrimes error("No current job"); 5781556Srgrimes#endif 5791556Srgrimes } else if (name[0] == '%') { 5801556Srgrimes if (is_digit(name[1])) { 5811556Srgrimes jobno = number(name + 1); 5821556Srgrimes if (jobno > 0 && jobno <= njobs 5831556Srgrimes && jobtab[jobno - 1].used != 0) 5841556Srgrimes return &jobtab[jobno - 1]; 5851556Srgrimes#if JOBS 5861556Srgrimes } else if (name[1] == '%' && name[2] == '\0') { 5871556Srgrimes goto currentjob; 58897688Stjr } else if (name[1] == '+' && name[2] == '\0') { 58997688Stjr goto currentjob; 59097688Stjr } else if (name[1] == '-' && name[2] == '\0') { 59197688Stjr if ((jp = getcurjob(NULL)) == NULL || 59297688Stjr (jp = getcurjob(jp)) == NULL) 59397688Stjr error("No previous job"); 59497688Stjr return (jp); 5951556Srgrimes#endif 59697688Stjr } else if (name[1] == '?') { 59797688Stjr found = NULL; 59897688Stjr for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 59997688Stjr if (jp->used && jp->nprocs > 0 60097688Stjr && strstr(jp->ps[0].cmd, name + 2) != NULL) { 60197688Stjr if (found) 60297688Stjr error("%s: ambiguous", name); 60397688Stjr found = jp; 60497688Stjr } 60597688Stjr } 60697688Stjr if (found != NULL) 60797688Stjr return (found); 6081556Srgrimes } else { 60997688Stjr found = NULL; 6101556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 6111556Srgrimes if (jp->used && jp->nprocs > 0 6121556Srgrimes && prefix(name + 1, jp->ps[0].cmd)) { 6131556Srgrimes if (found) 6141556Srgrimes error("%s: ambiguous", name); 6151556Srgrimes found = jp; 6161556Srgrimes } 6171556Srgrimes } 6181556Srgrimes if (found) 6191556Srgrimes return found; 6201556Srgrimes } 6211556Srgrimes } else if (is_number(name)) { 622100308Stjr pid = (pid_t)number(name); 6231556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 6241556Srgrimes if (jp->used && jp->nprocs > 0 6251556Srgrimes && jp->ps[jp->nprocs - 1].pid == pid) 6261556Srgrimes return jp; 6271556Srgrimes } 6281556Srgrimes } 6291556Srgrimes error("No such job: %s", name); 63017987Speter /*NOTREACHED*/ 63117987Speter return NULL; 6321556Srgrimes} 6331556Srgrimes 6341556Srgrimes 635216629Sjillespid_t 636216629Sjillesgetjobpgrp(char *name) 637216629Sjilles{ 638216629Sjilles struct job *jp; 6391556Srgrimes 640216629Sjilles jp = getjob(name); 641216629Sjilles return -jp->ps[0].pid; 642216629Sjilles} 643216629Sjilles 6441556Srgrimes/* 6451556Srgrimes * Return a new job structure, 6461556Srgrimes */ 6471556Srgrimes 6481556Srgrimesstruct job * 64990111Simpmakejob(union node *node __unused, int nprocs) 65017987Speter{ 6511556Srgrimes int i; 6521556Srgrimes struct job *jp; 6531556Srgrimes 6541556Srgrimes for (i = njobs, jp = jobtab ; ; jp++) { 6551556Srgrimes if (--i < 0) { 6561556Srgrimes INTOFF; 6571556Srgrimes if (njobs == 0) { 6581556Srgrimes jobtab = ckmalloc(4 * sizeof jobtab[0]); 65997664Stjr#if JOBS 66097659Stjr jobmru = NULL; 66197664Stjr#endif 6621556Srgrimes } else { 6631556Srgrimes jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); 66417987Speter memcpy(jp, jobtab, njobs * sizeof jp[0]); 66597659Stjr#if JOBS 66697659Stjr /* Relocate `next' pointers and list head */ 66799760Stjr if (jobmru != NULL) 66899760Stjr jobmru = &jp[jobmru - jobtab]; 66997659Stjr for (i = 0; i < njobs; i++) 67097659Stjr if (jp[i].next != NULL) 67197659Stjr jp[i].next = &jp[jp[i].next - 67297659Stjr jobtab]; 67397659Stjr#endif 674209600Sjilles if (bgjob != NULL) 675209600Sjilles bgjob = &jp[bgjob - jobtab]; 67620425Ssteve /* Relocate `ps' pointers */ 67720425Ssteve for (i = 0; i < njobs; i++) 67820425Ssteve if (jp[i].ps == &jobtab[i].ps0) 67920425Ssteve jp[i].ps = &jp[i].ps0; 6801556Srgrimes ckfree(jobtab); 6811556Srgrimes jobtab = jp; 6821556Srgrimes } 6831556Srgrimes jp = jobtab + njobs; 6841556Srgrimes for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0); 6851556Srgrimes INTON; 6861556Srgrimes break; 6871556Srgrimes } 6881556Srgrimes if (jp->used == 0) 6891556Srgrimes break; 6901556Srgrimes } 6911556Srgrimes INTOFF; 6921556Srgrimes jp->state = 0; 6931556Srgrimes jp->used = 1; 6941556Srgrimes jp->changed = 0; 6951556Srgrimes jp->nprocs = 0; 696100305Stjr jp->foreground = 0; 697209600Sjilles jp->remembered = 0; 6981556Srgrimes#if JOBS 6991556Srgrimes jp->jobctl = jobctl; 70097659Stjr jp->next = NULL; 7011556Srgrimes#endif 7021556Srgrimes if (nprocs > 1) { 7031556Srgrimes jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); 7041556Srgrimes } else { 7051556Srgrimes jp->ps = &jp->ps0; 7061556Srgrimes } 7071556Srgrimes INTON; 708213775Sjhb TRACE(("makejob(%p, %d) returns %%%td\n", (void *)node, nprocs, 70917987Speter jp - jobtab + 1)); 7101556Srgrimes return jp; 7118855Srgrimes} 7121556Srgrimes 71397659Stjr#if JOBS 714213811Sobrienstatic void 71597659Stjrsetcurjob(struct job *cj) 71697659Stjr{ 71797659Stjr struct job *jp, *prev; 7181556Srgrimes 71997659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 72097659Stjr if (jp == cj) { 72197659Stjr if (prev != NULL) 72297659Stjr prev->next = jp->next; 72397659Stjr else 72497659Stjr jobmru = jp->next; 72597659Stjr jp->next = jobmru; 72697659Stjr jobmru = cj; 72797659Stjr return; 72897659Stjr } 72997659Stjr } 73097659Stjr cj->next = jobmru; 73197659Stjr jobmru = cj; 73297659Stjr} 73397659Stjr 734213811Sobrienstatic void 73597659Stjrdeljob(struct job *j) 73697659Stjr{ 73797659Stjr struct job *jp, *prev; 73897659Stjr 73997659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 74097659Stjr if (jp == j) { 74197659Stjr if (prev != NULL) 74297659Stjr prev->next = jp->next; 74397659Stjr else 74497659Stjr jobmru = jp->next; 74597659Stjr return; 74697659Stjr } 74797659Stjr } 74897659Stjr} 74997659Stjr 7501556Srgrimes/* 75197659Stjr * Return the most recently used job that isn't `nj', and preferably one 75297659Stjr * that is stopped. 75397659Stjr */ 754213811Sobrienstatic struct job * 75597659Stjrgetcurjob(struct job *nj) 75697659Stjr{ 75797659Stjr struct job *jp; 75897659Stjr 75997659Stjr /* Try to find a stopped one.. */ 76097659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 76197659Stjr if (jp->used && jp != nj && jp->state == JOBSTOPPED) 76297659Stjr return (jp); 76397659Stjr /* Otherwise the most recently used job that isn't `nj' */ 76497659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 76597659Stjr if (jp->used && jp != nj) 76697659Stjr return (jp); 76797659Stjr 76897659Stjr return (NULL); 76997659Stjr} 77097659Stjr 77197659Stjr#endif 77297659Stjr 77397659Stjr/* 7741556Srgrimes * Fork of a subshell. If we are doing job control, give the subshell its 7751556Srgrimes * own process group. Jp is a job structure that the job is to be added to. 7761556Srgrimes * N is the command that will be evaluated by the child. Both jp and n may 7771556Srgrimes * be NULL. The mode parameter can be one of the following: 7781556Srgrimes * FORK_FG - Fork off a foreground process. 7791556Srgrimes * FORK_BG - Fork off a background process. 7801556Srgrimes * FORK_NOJOB - Like FORK_FG, but don't give the process its own 7811556Srgrimes * process group even if job control is on. 7821556Srgrimes * 7831556Srgrimes * When job control is turned off, background processes have their standard 7841556Srgrimes * input redirected to /dev/null (except for the second and later processes 7851556Srgrimes * in a pipeline). 7861556Srgrimes */ 7871556Srgrimes 788100308Stjrpid_t 78990111Simpforkshell(struct job *jp, union node *n, int mode) 79017987Speter{ 791100308Stjr pid_t pid; 792100308Stjr pid_t pgrp; 7931556Srgrimes 794213775Sjhb TRACE(("forkshell(%%%td, %p, %d) called\n", jp - jobtab, (void *)n, 79517987Speter mode)); 7961556Srgrimes INTOFF; 797216208Sjilles if (mode == FORK_BG && (jp == NULL || jp->nprocs == 0)) 798208489Sjilles checkzombies(); 799112341Stjr flushall(); 8001556Srgrimes pid = fork(); 8011556Srgrimes if (pid == -1) { 8021556Srgrimes TRACE(("Fork failed, errno=%d\n", errno)); 8031556Srgrimes INTON; 80453891Scracauer error("Cannot fork: %s", strerror(errno)); 8051556Srgrimes } 8061556Srgrimes if (pid == 0) { 8071556Srgrimes struct job *p; 8081556Srgrimes int wasroot; 8091556Srgrimes int i; 8101556Srgrimes 811100308Stjr TRACE(("Child shell %d\n", (int)getpid())); 8121556Srgrimes wasroot = rootshell; 8131556Srgrimes rootshell = 0; 814200998Sjilles handler = &main_handler; 8151556Srgrimes closescript(); 8161556Srgrimes INTON; 8171556Srgrimes clear_traps(); 8181556Srgrimes#if JOBS 8191556Srgrimes jobctl = 0; /* do job control only in root shell */ 8201556Srgrimes if (wasroot && mode != FORK_NOJOB && mflag) { 8211556Srgrimes if (jp == NULL || jp->nprocs == 0) 8221556Srgrimes pgrp = getpid(); 8231556Srgrimes else 8241556Srgrimes pgrp = jp->ps[0].pid; 82521352Ssteve if (setpgid(0, pgrp) == 0 && mode == FORK_FG) { 8261556Srgrimes /*** this causes superfluous TIOCSPGRPS ***/ 82799762Stjr if (tcsetpgrp(ttyfd, pgrp) < 0) 82820425Ssteve error("tcsetpgrp failed, errno=%d", errno); 8291556Srgrimes } 8301556Srgrimes setsignal(SIGTSTP); 8311556Srgrimes setsignal(SIGTTOU); 8321556Srgrimes } else if (mode == FORK_BG) { 8331556Srgrimes ignoresig(SIGINT); 8341556Srgrimes ignoresig(SIGQUIT); 8351556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 8361556Srgrimes ! fd0_redirected_p ()) { 8371556Srgrimes close(0); 83869793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 83969793Sobrien error("Can't open %s: %s", 84069793Sobrien _PATH_DEVNULL, strerror(errno)); 8411556Srgrimes } 8421556Srgrimes } 8431556Srgrimes#else 8441556Srgrimes if (mode == FORK_BG) { 8451556Srgrimes ignoresig(SIGINT); 8461556Srgrimes ignoresig(SIGQUIT); 8471556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 8481556Srgrimes ! fd0_redirected_p ()) { 8491556Srgrimes close(0); 85069793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 851155301Sschweikh error("Can't open %s: %s", 85269793Sobrien _PATH_DEVNULL, strerror(errno)); 8531556Srgrimes } 8541556Srgrimes } 8551556Srgrimes#endif 856102051Stjr INTOFF; 857102051Stjr for (i = njobs, p = jobtab ; --i >= 0 ; p++) 858102051Stjr if (p->used) 859102051Stjr freejob(p); 860102051Stjr INTON; 8611556Srgrimes if (wasroot && iflag) { 8621556Srgrimes setsignal(SIGINT); 8631556Srgrimes setsignal(SIGQUIT); 8641556Srgrimes setsignal(SIGTERM); 8651556Srgrimes } 8661556Srgrimes return pid; 8671556Srgrimes } 8681556Srgrimes if (rootshell && mode != FORK_NOJOB && mflag) { 8691556Srgrimes if (jp == NULL || jp->nprocs == 0) 8701556Srgrimes pgrp = pid; 8711556Srgrimes else 8721556Srgrimes pgrp = jp->ps[0].pid; 87317987Speter setpgid(pid, pgrp); 8741556Srgrimes } 875209600Sjilles if (mode == FORK_BG) { 876209600Sjilles if (bgjob != NULL && bgjob->state == JOBDONE && 877209600Sjilles !bgjob->remembered && !iflag) 878209600Sjilles freejob(bgjob); 8791556Srgrimes backgndpid = pid; /* set $! */ 880209600Sjilles bgjob = jp; 881209600Sjilles } 8821556Srgrimes if (jp) { 8831556Srgrimes struct procstat *ps = &jp->ps[jp->nprocs++]; 8841556Srgrimes ps->pid = pid; 8851556Srgrimes ps->status = -1; 8861556Srgrimes ps->cmd = nullstr; 8871556Srgrimes if (iflag && rootshell && n) 8881556Srgrimes ps->cmd = commandtext(n); 889100305Stjr jp->foreground = mode == FORK_FG; 89097659Stjr#if JOBS 89197659Stjr setcurjob(jp); 89297659Stjr#endif 8931556Srgrimes } 8941556Srgrimes INTON; 895100308Stjr TRACE(("In parent shell: child = %d\n", (int)pid)); 8961556Srgrimes return pid; 8971556Srgrimes} 8981556Srgrimes 8991556Srgrimes 9001556Srgrimes 9011556Srgrimes/* 9021556Srgrimes * Wait for job to finish. 9031556Srgrimes * 9041556Srgrimes * Under job control we have the problem that while a child process is 9051556Srgrimes * running interrupts generated by the user are sent to the child but not 9061556Srgrimes * to the shell. This means that an infinite loop started by an inter- 9071556Srgrimes * active user may be hard to kill. With job control turned off, an 9081556Srgrimes * interactive user may place an interactive program inside a loop. If 9091556Srgrimes * the interactive program catches interrupts, the user doesn't want 9101556Srgrimes * these interrupts to also abort the loop. The approach we take here 9111556Srgrimes * is to have the shell ignore interrupt signals while waiting for a 91246684Skris * foreground process to terminate, and then send itself an interrupt 9131556Srgrimes * signal if the child process was terminated by an interrupt signal. 9141556Srgrimes * Unfortunately, some programs want to do a bit of cleanup and then 9151556Srgrimes * exit on interrupt; unless these processes terminate themselves by 9161556Srgrimes * sending a signal to themselves (instead of calling exit) they will 9171556Srgrimes * confuse this approach. 9181556Srgrimes */ 9191556Srgrimes 9201556Srgrimesint 92190111Simpwaitforjob(struct job *jp, int *origstatus) 92245916Scracauer{ 9231556Srgrimes#if JOBS 924100308Stjr pid_t mypgrp = getpgrp(); 925208881Sjilles int propagate_int = jp->jobctl && jp->foreground; 9261556Srgrimes#endif 9271556Srgrimes int status; 9281556Srgrimes int st; 9291556Srgrimes 9301556Srgrimes INTOFF; 931213775Sjhb TRACE(("waitforjob(%%%td) called\n", jp - jobtab + 1)); 93238950Scracauer while (jp->state == 0) 93338950Scracauer if (dowait(1, jp) == -1) 93438950Scracauer dotrap(); 9351556Srgrimes#if JOBS 9361556Srgrimes if (jp->jobctl) { 93799762Stjr if (tcsetpgrp(ttyfd, mypgrp) < 0) 93820425Ssteve error("tcsetpgrp failed, errno=%d\n", errno); 9391556Srgrimes } 9401556Srgrimes if (jp->state == JOBSTOPPED) 94197659Stjr setcurjob(jp); 9421556Srgrimes#endif 9431556Srgrimes status = jp->ps[jp->nprocs - 1].status; 94445916Scracauer if (origstatus != NULL) 94545916Scracauer *origstatus = status; 9461556Srgrimes /* convert to 8 bits */ 94726104Ssteve if (WIFEXITED(status)) 94826104Ssteve st = WEXITSTATUS(status); 9491556Srgrimes#if JOBS 95026104Ssteve else if (WIFSTOPPED(status)) 95126104Ssteve st = WSTOPSIG(status) + 128; 9521556Srgrimes#endif 9531556Srgrimes else 95426104Ssteve st = WTERMSIG(status) + 128; 9551556Srgrimes if (! JOBS || jp->state == JOBDONE) 9561556Srgrimes freejob(jp); 95738521Scracauer if (int_pending()) { 958216400Sjilles if (!WIFSIGNALED(status) || WTERMSIG(status) != SIGINT) 95938521Scracauer CLEAR_PENDING_INT; 96038521Scracauer } 961208881Sjilles#if JOBS 962208881Sjilles else if (rootshell && iflag && propagate_int && 963208881Sjilles WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) 964208881Sjilles kill(getpid(), SIGINT); 965208881Sjilles#endif 9661556Srgrimes INTON; 9671556Srgrimes return st; 9681556Srgrimes} 9691556Srgrimes 9701556Srgrimes 9711556Srgrimes 9721556Srgrimes/* 9731556Srgrimes * Wait for a process to terminate. 9741556Srgrimes */ 9751556Srgrimes 976213811Sobrienstatic pid_t 97790111Simpdowait(int block, struct job *job) 97817987Speter{ 979100308Stjr pid_t pid; 9801556Srgrimes int status; 9811556Srgrimes struct procstat *sp; 9821556Srgrimes struct job *jp; 9831556Srgrimes struct job *thisjob; 9841556Srgrimes int done; 9851556Srgrimes int stopped; 98626104Ssteve int sig; 987216217Sjilles int coredump; 9881556Srgrimes 98938950Scracauer in_dowait++; 9901556Srgrimes TRACE(("dowait(%d) called\n", block)); 9911556Srgrimes do { 9921556Srgrimes pid = waitproc(block, &status); 993100308Stjr TRACE(("wait returns %d, status=%d\n", (int)pid, status)); 99472086Scracauer } while ((pid == -1 && errno == EINTR && breakwaitcmd == 0) || 995125501Scracauer (pid > 0 && WIFSTOPPED(status) && !iflag)); 99638950Scracauer in_dowait--; 997153417Smaxim if (pid == -1 && errno == ECHILD && job != NULL) 998153417Smaxim job->state = JOBDONE; 99938521Scracauer if (breakwaitcmd != 0) { 100038521Scracauer breakwaitcmd = 0; 1001138312Smaxim if (pid <= 0) 1002138312Smaxim return -1; 100338521Scracauer } 10041556Srgrimes if (pid <= 0) 10051556Srgrimes return pid; 10061556Srgrimes INTOFF; 10071556Srgrimes thisjob = NULL; 10081556Srgrimes for (jp = jobtab ; jp < jobtab + njobs ; jp++) { 1009216208Sjilles if (jp->used && jp->nprocs > 0) { 10101556Srgrimes done = 1; 10111556Srgrimes stopped = 1; 10121556Srgrimes for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { 10131556Srgrimes if (sp->pid == -1) 10141556Srgrimes continue; 10151556Srgrimes if (sp->pid == pid) { 101626104Ssteve TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", 1017100308Stjr (int)pid, sp->status, 1018100308Stjr status)); 10191556Srgrimes sp->status = status; 10201556Srgrimes thisjob = jp; 10211556Srgrimes } 10221556Srgrimes if (sp->status == -1) 10231556Srgrimes stopped = 0; 102426104Ssteve else if (WIFSTOPPED(sp->status)) 10251556Srgrimes done = 0; 10261556Srgrimes } 10271556Srgrimes if (stopped) { /* stopped or done */ 10281556Srgrimes int state = done? JOBDONE : JOBSTOPPED; 10291556Srgrimes if (jp->state != state) { 1030213775Sjhb TRACE(("Job %td: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); 10311556Srgrimes jp->state = state; 1032209600Sjilles if (jp != job) { 1033209600Sjilles if (done && !jp->remembered && 1034209600Sjilles !iflag && jp != bgjob) 1035209600Sjilles freejob(jp); 10361556Srgrimes#if JOBS 1037209600Sjilles else if (done) 1038209600Sjilles deljob(jp); 10391556Srgrimes#endif 1040209600Sjilles } 10411556Srgrimes } 10421556Srgrimes } 10431556Srgrimes } 10441556Srgrimes } 10451556Srgrimes INTON; 1046216217Sjilles if (!thisjob || thisjob->state == 0) 1047216217Sjilles ; 1048216217Sjilles else if ((!rootshell || !iflag || thisjob == job) && 1049216217Sjilles thisjob->foreground && thisjob->state != JOBSTOPPED) { 1050216217Sjilles sig = 0; 1051216217Sjilles coredump = 0; 1052216217Sjilles for (sp = thisjob->ps; sp < thisjob->ps + thisjob->nprocs; sp++) 1053216217Sjilles if (WIFSIGNALED(sp->status)) { 1054216217Sjilles sig = WTERMSIG(sp->status); 1055216217Sjilles coredump = WCOREDUMP(sp->status); 1056216217Sjilles } 1057216217Sjilles if (sig > 0 && sig != SIGINT && sig != SIGPIPE) { 1058216217Sjilles if (sig < sys_nsig && sys_siglist[sig]) 1059218105Sjilles out2str(sys_siglist[sig]); 106026104Ssteve else 1061218105Sjilles outfmt(out2, "Signal %d", sig); 1062216217Sjilles if (coredump) 1063218105Sjilles out2str(" (core dumped)"); 1064218105Sjilles out2c('\n'); 1065218105Sjilles flushout(out2); 10661556Srgrimes } 10671556Srgrimes } else { 1068109627Stjr TRACE(("Not printing status, rootshell=%d, job=%p\n", rootshell, job)); 1069216217Sjilles thisjob->changed = 1; 10701556Srgrimes } 10711556Srgrimes return pid; 10721556Srgrimes} 10731556Srgrimes 10741556Srgrimes 10751556Srgrimes 10761556Srgrimes/* 10771556Srgrimes * Do a wait system call. If job control is compiled in, we accept 10781556Srgrimes * stopped processes. If block is zero, we return a value of zero 10791556Srgrimes * rather than blocking. 10801556Srgrimes */ 1081213811Sobrienstatic pid_t 108290111Simpwaitproc(int block, int *status) 108317987Speter{ 10841556Srgrimes int flags; 10851556Srgrimes 10861556Srgrimes#if JOBS 10871556Srgrimes flags = WUNTRACED; 10881556Srgrimes#else 10891556Srgrimes flags = 0; 10901556Srgrimes#endif 10911556Srgrimes if (block == 0) 10921556Srgrimes flags |= WNOHANG; 10931556Srgrimes return wait3(status, flags, (struct rusage *)NULL); 10941556Srgrimes} 10951556Srgrimes 10961556Srgrimes/* 10971556Srgrimes * return 1 if there are stopped jobs, otherwise 0 10981556Srgrimes */ 10991556Srgrimesint job_warning = 0; 11001556Srgrimesint 110190111Simpstoppedjobs(void) 11021556Srgrimes{ 110325222Ssteve int jobno; 110425222Ssteve struct job *jp; 11051556Srgrimes 11061556Srgrimes if (job_warning) 11071556Srgrimes return (0); 11081556Srgrimes for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { 11091556Srgrimes if (jp->used == 0) 11101556Srgrimes continue; 11111556Srgrimes if (jp->state == JOBSTOPPED) { 1112199629Sjilles out2fmt_flush("You have stopped jobs.\n"); 11131556Srgrimes job_warning = 2; 11141556Srgrimes return (1); 11151556Srgrimes } 11161556Srgrimes } 11171556Srgrimes 11181556Srgrimes return (0); 11191556Srgrimes} 11201556Srgrimes 1121208489Sjilles 1122213811Sobrienstatic void 1123208489Sjillescheckzombies(void) 1124208489Sjilles{ 1125208489Sjilles while (njobs > 0 && dowait(0, NULL) > 0) 1126208489Sjilles ; 1127208489Sjilles} 1128208489Sjilles 1129208489Sjilles 1130209600Sjillesint 1131209600Sjillesbackgndpidset(void) 1132209600Sjilles{ 1133209600Sjilles return backgndpid != -1; 1134209600Sjilles} 1135209600Sjilles 1136209600Sjilles 1137209600Sjillespid_t 1138209600Sjillesbackgndpidval(void) 1139209600Sjilles{ 1140209600Sjilles if (bgjob != NULL) 1141209600Sjilles bgjob->remembered = 1; 1142209600Sjilles return backgndpid; 1143209600Sjilles} 1144209600Sjilles 11451556Srgrimes/* 11461556Srgrimes * Return a string identifying a command (to be printed by the 11471556Srgrimes * jobs command. 11481556Srgrimes */ 11491556Srgrimes 1150213760Sobrienstatic char *cmdnextc; 1151213760Sobrienstatic int cmdnleft; 11521556Srgrimes#define MAXCMDTEXT 200 11531556Srgrimes 11541556Srgrimeschar * 115590111Simpcommandtext(union node *n) 115690111Simp{ 11571556Srgrimes char *name; 11581556Srgrimes 11591556Srgrimes cmdnextc = name = ckmalloc(MAXCMDTEXT); 11601556Srgrimes cmdnleft = MAXCMDTEXT - 4; 11611556Srgrimes cmdtxt(n); 11621556Srgrimes *cmdnextc = '\0'; 11631556Srgrimes return name; 11641556Srgrimes} 11651556Srgrimes 11661556Srgrimes 1167213811Sobrienstatic void 116890111Simpcmdtxt(union node *n) 116990111Simp{ 11701556Srgrimes union node *np; 11711556Srgrimes struct nodelist *lp; 1172201053Sjilles const char *p; 11731556Srgrimes int i; 11741556Srgrimes char s[2]; 11751556Srgrimes 11761556Srgrimes if (n == NULL) 11771556Srgrimes return; 11781556Srgrimes switch (n->type) { 11791556Srgrimes case NSEMI: 11801556Srgrimes cmdtxt(n->nbinary.ch1); 11811556Srgrimes cmdputs("; "); 11821556Srgrimes cmdtxt(n->nbinary.ch2); 11831556Srgrimes break; 11841556Srgrimes case NAND: 11851556Srgrimes cmdtxt(n->nbinary.ch1); 11861556Srgrimes cmdputs(" && "); 11871556Srgrimes cmdtxt(n->nbinary.ch2); 11881556Srgrimes break; 11891556Srgrimes case NOR: 11901556Srgrimes cmdtxt(n->nbinary.ch1); 11911556Srgrimes cmdputs(" || "); 11921556Srgrimes cmdtxt(n->nbinary.ch2); 11931556Srgrimes break; 11941556Srgrimes case NPIPE: 11951556Srgrimes for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 11961556Srgrimes cmdtxt(lp->n); 11971556Srgrimes if (lp->next) 11981556Srgrimes cmdputs(" | "); 11991556Srgrimes } 12001556Srgrimes break; 12011556Srgrimes case NSUBSHELL: 12021556Srgrimes cmdputs("("); 12031556Srgrimes cmdtxt(n->nredir.n); 12041556Srgrimes cmdputs(")"); 12051556Srgrimes break; 12061556Srgrimes case NREDIR: 12071556Srgrimes case NBACKGND: 12081556Srgrimes cmdtxt(n->nredir.n); 12091556Srgrimes break; 12101556Srgrimes case NIF: 12111556Srgrimes cmdputs("if "); 12121556Srgrimes cmdtxt(n->nif.test); 12131556Srgrimes cmdputs("; then "); 12141556Srgrimes cmdtxt(n->nif.ifpart); 12151556Srgrimes cmdputs("..."); 12161556Srgrimes break; 12171556Srgrimes case NWHILE: 12181556Srgrimes cmdputs("while "); 12191556Srgrimes goto until; 12201556Srgrimes case NUNTIL: 12211556Srgrimes cmdputs("until "); 12221556Srgrimesuntil: 12231556Srgrimes cmdtxt(n->nbinary.ch1); 12241556Srgrimes cmdputs("; do "); 12251556Srgrimes cmdtxt(n->nbinary.ch2); 12261556Srgrimes cmdputs("; done"); 12271556Srgrimes break; 12281556Srgrimes case NFOR: 12291556Srgrimes cmdputs("for "); 12301556Srgrimes cmdputs(n->nfor.var); 12311556Srgrimes cmdputs(" in ..."); 12321556Srgrimes break; 12331556Srgrimes case NCASE: 12341556Srgrimes cmdputs("case "); 12351556Srgrimes cmdputs(n->ncase.expr->narg.text); 12361556Srgrimes cmdputs(" in ..."); 12371556Srgrimes break; 12381556Srgrimes case NDEFUN: 12391556Srgrimes cmdputs(n->narg.text); 12401556Srgrimes cmdputs("() ..."); 12411556Srgrimes break; 12421556Srgrimes case NCMD: 12431556Srgrimes for (np = n->ncmd.args ; np ; np = np->narg.next) { 12441556Srgrimes cmdtxt(np); 12451556Srgrimes if (np->narg.next) 12461556Srgrimes cmdputs(" "); 12471556Srgrimes } 12481556Srgrimes for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { 12491556Srgrimes cmdputs(" "); 12501556Srgrimes cmdtxt(np); 12511556Srgrimes } 12521556Srgrimes break; 12531556Srgrimes case NARG: 12541556Srgrimes cmdputs(n->narg.text); 12551556Srgrimes break; 12561556Srgrimes case NTO: 12571556Srgrimes p = ">"; i = 1; goto redir; 12581556Srgrimes case NAPPEND: 12591556Srgrimes p = ">>"; i = 1; goto redir; 12601556Srgrimes case NTOFD: 12611556Srgrimes p = ">&"; i = 1; goto redir; 126296922Stjr case NCLOBBER: 126396922Stjr p = ">|"; i = 1; goto redir; 12641556Srgrimes case NFROM: 12651556Srgrimes p = "<"; i = 0; goto redir; 126666612Sbrian case NFROMTO: 126766612Sbrian p = "<>"; i = 0; goto redir; 12681556Srgrimes case NFROMFD: 12691556Srgrimes p = "<&"; i = 0; goto redir; 12701556Srgrimesredir: 12711556Srgrimes if (n->nfile.fd != i) { 12721556Srgrimes s[0] = n->nfile.fd + '0'; 12731556Srgrimes s[1] = '\0'; 12741556Srgrimes cmdputs(s); 12751556Srgrimes } 12761556Srgrimes cmdputs(p); 12771556Srgrimes if (n->type == NTOFD || n->type == NFROMFD) { 127899634Stjr if (n->ndup.dupfd >= 0) 127999634Stjr s[0] = n->ndup.dupfd + '0'; 128099634Stjr else 128199634Stjr s[0] = '-'; 12821556Srgrimes s[1] = '\0'; 12831556Srgrimes cmdputs(s); 12841556Srgrimes } else { 12851556Srgrimes cmdtxt(n->nfile.fname); 12861556Srgrimes } 12871556Srgrimes break; 12881556Srgrimes case NHERE: 12891556Srgrimes case NXHERE: 12901556Srgrimes cmdputs("<<..."); 12911556Srgrimes break; 12921556Srgrimes default: 12931556Srgrimes cmdputs("???"); 12941556Srgrimes break; 12951556Srgrimes } 12961556Srgrimes} 12971556Srgrimes 12981556Srgrimes 12991556Srgrimes 1300213811Sobrienstatic void 1301201053Sjillescmdputs(const char *s) 130290111Simp{ 1303201053Sjilles const char *p; 1304201053Sjilles char *q; 130525222Ssteve char c; 13061556Srgrimes int subtype = 0; 13071556Srgrimes 13081556Srgrimes if (cmdnleft <= 0) 13091556Srgrimes return; 13101556Srgrimes p = s; 13111556Srgrimes q = cmdnextc; 13121556Srgrimes while ((c = *p++) != '\0') { 13131556Srgrimes if (c == CTLESC) 13141556Srgrimes *q++ = *p++; 13151556Srgrimes else if (c == CTLVAR) { 13161556Srgrimes *q++ = '$'; 13171556Srgrimes if (--cmdnleft > 0) 13181556Srgrimes *q++ = '{'; 13191556Srgrimes subtype = *p++; 1320216246Sjilles if ((subtype & VSTYPE) == VSLENGTH && --cmdnleft > 0) 1321216246Sjilles *q++ = '#'; 13221556Srgrimes } else if (c == '=' && subtype != 0) { 1323216246Sjilles *q = "}-+?=##%%\0X"[(subtype & VSTYPE) - VSNORMAL]; 1324216246Sjilles if (*q) 1325216246Sjilles q++; 1326216246Sjilles else 1327216246Sjilles cmdnleft++; 1328216246Sjilles if (((subtype & VSTYPE) == VSTRIMLEFTMAX || 1329216246Sjilles (subtype & VSTYPE) == VSTRIMRIGHTMAX) && 1330216246Sjilles --cmdnleft > 0) 1331216246Sjilles *q = q[-1], q++; 13321556Srgrimes subtype = 0; 13331556Srgrimes } else if (c == CTLENDVAR) { 13341556Srgrimes *q++ = '}'; 1335216246Sjilles } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) { 1336216246Sjilles cmdnleft -= 5; 1337216246Sjilles if (cmdnleft > 0) { 1338216246Sjilles *q++ = '$'; 1339216246Sjilles *q++ = '('; 1340216246Sjilles *q++ = '.'; 1341216246Sjilles *q++ = '.'; 1342216246Sjilles *q++ = '.'; 1343216246Sjilles *q++ = ')'; 1344216246Sjilles } 1345216246Sjilles } else if (c == CTLARI) { 1346216246Sjilles cmdnleft -= 2; 1347216246Sjilles if (cmdnleft > 0) { 1348216246Sjilles *q++ = '$'; 1349216246Sjilles *q++ = '('; 1350216246Sjilles *q++ = '('; 1351216246Sjilles } 1352216246Sjilles p++; 1353216246Sjilles } else if (c == CTLENDARI) { 1354216246Sjilles if (--cmdnleft > 0) { 1355216246Sjilles *q++ = ')'; 1356216246Sjilles *q++ = ')'; 1357216246Sjilles } 1358216246Sjilles } else if (c == CTLQUOTEMARK || c == CTLQUOTEEND) 1359216246Sjilles cmdnleft++; /* ignore */ 13601556Srgrimes else 13611556Srgrimes *q++ = c; 13621556Srgrimes if (--cmdnleft <= 0) { 13631556Srgrimes *q++ = '.'; 13641556Srgrimes *q++ = '.'; 13651556Srgrimes *q++ = '.'; 13661556Srgrimes break; 13671556Srgrimes } 13681556Srgrimes } 13691556Srgrimes cmdnextc = q; 13701556Srgrimes} 1371