11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1991, 1993 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * This code is derived from software contributed to Berkeley by 61556Srgrimes * Kenneth Almquist. 71556Srgrimes * 81556Srgrimes * Redistribution and use in source and binary forms, with or without 91556Srgrimes * modification, are permitted provided that the following conditions 101556Srgrimes * are met: 111556Srgrimes * 1. Redistributions of source code must retain the above copyright 121556Srgrimes * notice, this list of conditions and the following disclaimer. 131556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141556Srgrimes * notice, this list of conditions and the following disclaimer in the 151556Srgrimes * documentation and/or other materials provided with the distribution. 161556Srgrimes * 4. Neither the name of the University nor the names of its contributors 171556Srgrimes * may be used to endorse or promote products derived from this software 181556Srgrimes * without specific prior written permission. 191556Srgrimes * 201556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301556Srgrimes * SUCH DAMAGE. 311556Srgrimes */ 321556Srgrimes 331556Srgrimes#ifndef lint 3436150Scharnier#if 0 3536150Scharnierstatic char sccsid[] = "@(#)jobs.c 8.5 (Berkeley) 5/4/95"; 3636150Scharnier#endif 371556Srgrimes#endif /* not lint */ 3899110Sobrien#include <sys/cdefs.h> 3999110Sobrien__FBSDID("$FreeBSD$"); 401556Srgrimes 41213775Sjhb#include <sys/ioctl.h> 42213775Sjhb#include <sys/param.h> 43213775Sjhb#include <sys/resource.h> 44213775Sjhb#include <sys/time.h> 45213775Sjhb#include <sys/wait.h> 46213775Sjhb#include <errno.h> 4717987Speter#include <fcntl.h> 48213775Sjhb#include <paths.h> 4917987Speter#include <signal.h> 50213925Sjilles#include <stddef.h> 51213775Sjhb#include <stdlib.h> 5217987Speter#include <unistd.h> 5317987Speter 541556Srgrimes#include "shell.h" 551556Srgrimes#if JOBS 5617987Speter#include <termios.h> 571556Srgrimes#undef CEOF /* syntax.h redefines this */ 581556Srgrimes#endif 5917987Speter#include "redir.h" 60230998Sjilles#include "exec.h" 6117987Speter#include "show.h" 621556Srgrimes#include "main.h" 631556Srgrimes#include "parser.h" 641556Srgrimes#include "nodes.h" 651556Srgrimes#include "jobs.h" 661556Srgrimes#include "options.h" 671556Srgrimes#include "trap.h" 681556Srgrimes#include "syntax.h" 691556Srgrimes#include "input.h" 701556Srgrimes#include "output.h" 711556Srgrimes#include "memalloc.h" 721556Srgrimes#include "error.h" 731556Srgrimes#include "mystring.h" 74223024Sjilles#include "var.h" 75223060Sjilles#include "builtins.h" 761556Srgrimes 771556Srgrimes 78213760Sobrienstatic struct job *jobtab; /* array of jobs */ 79213760Sobrienstatic int njobs; /* size of array */ 80253658Sjillesstatic pid_t backgndpid = -1; /* pid of last background process */ 81253658Sjillesstatic struct job *bgjob = NULL; /* last background process */ 821556Srgrimes#if JOBS 83213760Sobrienstatic struct job *jobmru; /* most recently used job list */ 84213760Sobrienstatic pid_t initialpgrp; /* pgrp of shell on invocation */ 851556Srgrimes#endif 8699762Stjrstatic int ttyfd = -1; 871556Srgrimes 88238888Sjilles/* mode flags for dowait */ 89238888Sjilles#define DOWAIT_BLOCK 0x1 /* wait until a child exits */ 90255157Sjilles#define DOWAIT_SIG 0x2 /* if DOWAIT_BLOCK, abort on SIGINT/SIGQUIT */ 91255157Sjilles#define DOWAIT_SIG_ANY 0x4 /* if DOWAIT_SIG, abort on any signal */ 92238888Sjilles 9320425Ssteve#if JOBS 94213811Sobrienstatic void restartjob(struct job *); 9520425Ssteve#endif 96213811Sobrienstatic void freejob(struct job *); 97251429Sjillesstatic int waitcmdloop(struct job *); 98230530Scharnierpid_t getjobpgrp(char *); 99264168Sjillesstatic struct job *getjob_nonotfound(const char *); 100264168Sjillesstatic struct job *getjob(const char *); 101213811Sobrienstatic pid_t dowait(int, struct job *); 102213811Sobrienstatic void checkzombies(void); 103213811Sobrienstatic void cmdtxt(union node *); 104213811Sobrienstatic void cmdputs(const char *); 10597659Stjr#if JOBS 106213811Sobrienstatic void setcurjob(struct job *); 107213811Sobrienstatic void deljob(struct job *); 108213811Sobrienstatic struct job *getcurjob(struct job *); 10997659Stjr#endif 110216217Sjillesstatic void printjobcmd(struct job *); 111216217Sjillesstatic void showjob(struct job *, int); 1121556Srgrimes 1131556Srgrimes 1141556Srgrimes/* 1151556Srgrimes * Turn job control on and off. 1161556Srgrimes */ 1171556Srgrimes 118253658Sjillesstatic int jobctl; 1191556Srgrimes 12020425Ssteve#if JOBS 1211556Srgrimesvoid 12290111Simpsetjobctl(int on) 12317987Speter{ 12499762Stjr int i; 1251556Srgrimes 1261556Srgrimes if (on == jobctl || rootshell == 0) 1271556Srgrimes return; 1281556Srgrimes if (on) { 12999762Stjr if (ttyfd != -1) 13099762Stjr close(ttyfd); 131250267Sjilles if ((ttyfd = open(_PATH_TTY, O_RDWR | O_CLOEXEC)) < 0) { 13299762Stjr i = 0; 13399762Stjr while (i <= 2 && !isatty(i)) 13499762Stjr i++; 135250267Sjilles if (i > 2 || 136250267Sjilles (ttyfd = fcntl(i, F_DUPFD_CLOEXEC, 10)) < 0) 13799762Stjr goto out; 13899762Stjr } 139109927Stjr if (ttyfd < 10) { 140109927Stjr /* 141109927Stjr * Keep our TTY file descriptor out of the way of 142109927Stjr * the user's redirections. 143109927Stjr */ 144250267Sjilles if ((i = fcntl(ttyfd, F_DUPFD_CLOEXEC, 10)) < 0) { 145109927Stjr close(ttyfd); 146109927Stjr ttyfd = -1; 147109927Stjr goto out; 148109927Stjr } 149109927Stjr close(ttyfd); 150109927Stjr ttyfd = i; 151109927Stjr } 1521556Srgrimes do { /* while we are in the background */ 15399762Stjr initialpgrp = tcgetpgrp(ttyfd); 15420425Ssteve if (initialpgrp < 0) { 155199629Sjillesout: out2fmt_flush("sh: can't access tty; job control turned off\n"); 1561556Srgrimes mflag = 0; 1571556Srgrimes return; 1581556Srgrimes } 159216400Sjilles if (initialpgrp != getpgrp()) { 160216400Sjilles kill(0, SIGTTIN); 1611556Srgrimes continue; 1621556Srgrimes } 1631556Srgrimes } while (0); 1641556Srgrimes setsignal(SIGTSTP); 1651556Srgrimes setsignal(SIGTTOU); 1661556Srgrimes setsignal(SIGTTIN); 16717987Speter setpgid(0, rootpid); 16899762Stjr tcsetpgrp(ttyfd, rootpid); 1691556Srgrimes } else { /* turning job control off */ 17017987Speter setpgid(0, initialpgrp); 17199762Stjr tcsetpgrp(ttyfd, initialpgrp); 17299762Stjr close(ttyfd); 17399762Stjr ttyfd = -1; 1741556Srgrimes setsignal(SIGTSTP); 1751556Srgrimes setsignal(SIGTTOU); 1761556Srgrimes setsignal(SIGTTIN); 1771556Srgrimes } 1781556Srgrimes jobctl = on; 1791556Srgrimes} 18020425Ssteve#endif 1811556Srgrimes 1821556Srgrimes 1831556Srgrimes#if JOBS 18417987Speterint 185254413Sjillesfgcmd(int argc __unused, char **argv __unused) 18617987Speter{ 1871556Srgrimes struct job *jp; 188100308Stjr pid_t pgrp; 1891556Srgrimes int status; 1901556Srgrimes 191254413Sjilles nextopt(""); 192254413Sjilles jp = getjob(*argptr); 1931556Srgrimes if (jp->jobctl == 0) 1941556Srgrimes error("job not created under job control"); 195216217Sjilles printjobcmd(jp); 19696933Stjr flushout(&output); 1971556Srgrimes pgrp = jp->ps[0].pid; 19899762Stjr tcsetpgrp(ttyfd, pgrp); 1991556Srgrimes restartjob(jp); 200100305Stjr jp->foreground = 1; 2011556Srgrimes INTOFF; 20245916Scracauer status = waitforjob(jp, (int *)NULL); 2031556Srgrimes INTON; 2041556Srgrimes return status; 2051556Srgrimes} 2061556Srgrimes 2071556Srgrimes 20817987Speterint 20990111Simpbgcmd(int argc, char **argv) 21017987Speter{ 2111556Srgrimes struct job *jp; 2121556Srgrimes 213254413Sjilles nextopt(""); 2141556Srgrimes do { 215254413Sjilles jp = getjob(*argptr); 2161556Srgrimes if (jp->jobctl == 0) 2171556Srgrimes error("job not created under job control"); 21896933Stjr if (jp->state == JOBDONE) 21996933Stjr continue; 2201556Srgrimes restartjob(jp); 221100305Stjr jp->foreground = 0; 222216400Sjilles out1fmt("[%td] ", jp - jobtab + 1); 223216217Sjilles printjobcmd(jp); 224254413Sjilles } while (*argptr != NULL && *++argptr != NULL); 2251556Srgrimes return 0; 2261556Srgrimes} 2271556Srgrimes 2281556Srgrimes 229213811Sobrienstatic void 23090111Simprestartjob(struct job *jp) 23117987Speter{ 2321556Srgrimes struct procstat *ps; 2331556Srgrimes int i; 2341556Srgrimes 2351556Srgrimes if (jp->state == JOBDONE) 2361556Srgrimes return; 23797660Stjr setcurjob(jp); 2381556Srgrimes INTOFF; 239216400Sjilles kill(-jp->ps[0].pid, SIGCONT); 2401556Srgrimes for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 24126104Ssteve if (WIFSTOPPED(ps->status)) { 2421556Srgrimes ps->status = -1; 2431556Srgrimes jp->state = 0; 2441556Srgrimes } 2451556Srgrimes } 2461556Srgrimes INTON; 2471556Srgrimes} 2481556Srgrimes#endif 2491556Srgrimes 2501556Srgrimes 2511556Srgrimesint 252240541Sjillesjobscmd(int argc __unused, char *argv[] __unused) 25317987Speter{ 25497669Stjr char *id; 255163085Sstefanf int ch, mode; 25697669Stjr 257163085Sstefanf mode = SHOWJOBS_DEFAULT; 258240541Sjilles while ((ch = nextopt("lps")) != '\0') { 25997669Stjr switch (ch) { 26097669Stjr case 'l': 261163085Sstefanf mode = SHOWJOBS_VERBOSE; 26297669Stjr break; 263163085Sstefanf case 'p': 264163085Sstefanf mode = SHOWJOBS_PGIDS; 265163085Sstefanf break; 26697669Stjr case 's': 267163085Sstefanf mode = SHOWJOBS_PIDS; 26897669Stjr break; 26997669Stjr } 27097669Stjr } 27197669Stjr 272240541Sjilles if (*argptr == NULL) 273163085Sstefanf showjobs(0, mode); 27497669Stjr else 275240541Sjilles while ((id = *argptr++) != NULL) 276216217Sjilles showjob(getjob(id), mode); 27797669Stjr 27897669Stjr return (0); 2791556Srgrimes} 2801556Srgrimes 281213811Sobrienstatic void 282216217Sjillesprintjobcmd(struct job *jp) 28397663Stjr{ 284216217Sjilles struct procstat *ps; 285216217Sjilles int i; 286216217Sjilles 287216217Sjilles for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 288216217Sjilles out1str(ps->cmd); 289216217Sjilles if (i > 0) 290216217Sjilles out1str(" | "); 291216217Sjilles } 292216217Sjilles out1c('\n'); 293216217Sjilles} 294216217Sjilles 295216217Sjillesstatic void 296216217Sjillesshowjob(struct job *jp, int mode) 297216217Sjilles{ 29897663Stjr char s[64]; 299216217Sjilles char statestr[64]; 300244682Sjilles const char *sigstr; 30197663Stjr struct procstat *ps; 30297669Stjr struct job *j; 30397669Stjr int col, curr, i, jobno, prev, procno; 30497669Stjr char c; 3051556Srgrimes 306163085Sstefanf procno = (mode == SHOWJOBS_PGIDS) ? 1 : jp->nprocs; 30797663Stjr jobno = jp - jobtab + 1; 30897669Stjr curr = prev = 0; 30997669Stjr#if JOBS 31097669Stjr if ((j = getcurjob(NULL)) != NULL) { 31197669Stjr curr = j - jobtab + 1; 31297669Stjr if ((j = getcurjob(j)) != NULL) 31397669Stjr prev = j - jobtab + 1; 31497669Stjr } 31597669Stjr#endif 316216217Sjilles ps = jp->ps + jp->nprocs - 1; 317216217Sjilles if (jp->state == 0) { 318216217Sjilles strcpy(statestr, "Running"); 319216217Sjilles#if JOBS 320216217Sjilles } else if (jp->state == JOBSTOPPED) { 321216217Sjilles while (!WIFSTOPPED(ps->status) && ps > jp->ps) 322216217Sjilles ps--; 323216217Sjilles if (WIFSTOPPED(ps->status)) 324216217Sjilles i = WSTOPSIG(ps->status); 325216217Sjilles else 326216217Sjilles i = -1; 327244682Sjilles sigstr = strsignal(i); 328244682Sjilles if (sigstr != NULL) 329244682Sjilles strcpy(statestr, sigstr); 330216217Sjilles else 331216217Sjilles strcpy(statestr, "Suspended"); 332216217Sjilles#endif 333216217Sjilles } else if (WIFEXITED(ps->status)) { 334216217Sjilles if (WEXITSTATUS(ps->status) == 0) 335216217Sjilles strcpy(statestr, "Done"); 336216217Sjilles else 337216220Sjilles fmtstr(statestr, 64, "Done(%d)", 338216217Sjilles WEXITSTATUS(ps->status)); 339216217Sjilles } else { 340216217Sjilles i = WTERMSIG(ps->status); 341244682Sjilles sigstr = strsignal(i); 342244682Sjilles if (sigstr != NULL) 343244682Sjilles strcpy(statestr, sigstr); 344216217Sjilles else 345244682Sjilles strcpy(statestr, "Unknown signal"); 346216217Sjilles if (WCOREDUMP(ps->status)) 347216217Sjilles strcat(statestr, " (core dumped)"); 348216217Sjilles } 349216217Sjilles 350287750Sjilles for (ps = jp->ps ; procno > 0 ; ps++, procno--) { /* for each process */ 351163085Sstefanf if (mode == SHOWJOBS_PIDS || mode == SHOWJOBS_PGIDS) { 352216199Sjilles out1fmt("%d\n", (int)ps->pid); 353287750Sjilles continue; 35497669Stjr } 355216217Sjilles if (mode != SHOWJOBS_VERBOSE && ps != jp->ps) 356287750Sjilles continue; 35797819Stjr if (jobno == curr && ps == jp->ps) 35897669Stjr c = '+'; 35997819Stjr else if (jobno == prev && ps == jp->ps) 36097669Stjr c = '-'; 36197669Stjr else 36297669Stjr c = ' '; 36397663Stjr if (ps == jp->ps) 36497669Stjr fmtstr(s, 64, "[%d] %c ", jobno, c); 36597663Stjr else 36697816Stjr fmtstr(s, 64, " %c ", c); 36797663Stjr out1str(s); 36897663Stjr col = strlen(s); 369163085Sstefanf if (mode == SHOWJOBS_VERBOSE) { 370100308Stjr fmtstr(s, 64, "%d ", (int)ps->pid); 37197669Stjr out1str(s); 37297669Stjr col += strlen(s); 37397669Stjr } 374216217Sjilles if (ps == jp->ps) { 375216217Sjilles out1str(statestr); 376216217Sjilles col += strlen(statestr); 37797663Stjr } 37897663Stjr do { 37997663Stjr out1c(' '); 38097663Stjr col++; 38197663Stjr } while (col < 30); 382216217Sjilles if (mode == SHOWJOBS_VERBOSE) { 383216217Sjilles out1str(ps->cmd); 384216217Sjilles out1c('\n'); 385216217Sjilles } else 386216217Sjilles printjobcmd(jp); 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; 416216217Sjilles showjob(jp, mode); 417249984Sjilles if (mode == SHOWJOBS_DEFAULT || mode == SHOWJOBS_VERBOSE) { 418249984Sjilles jp->changed = 0; 419249984Sjilles /* Hack: discard jobs for which $! has not been 420249984Sjilles * referenced in interactive mode when they terminate. 421249984Sjilles */ 422249984Sjilles if (jp->state == JOBDONE && !jp->remembered && 423249984Sjilles (iflag || jp != bgjob)) { 424249984Sjilles freejob(jp); 425249984Sjilles } 4261556Srgrimes } 4271556Srgrimes } 4281556Srgrimes} 4291556Srgrimes 4301556Srgrimes 4311556Srgrimes/* 4321556Srgrimes * Mark a job structure as unused. 4331556Srgrimes */ 4341556Srgrimes 435213811Sobrienstatic void 43690111Simpfreejob(struct job *jp) 43790111Simp{ 4381556Srgrimes struct procstat *ps; 4391556Srgrimes int i; 4401556Srgrimes 4411556Srgrimes INTOFF; 442209600Sjilles if (bgjob == jp) 443209600Sjilles bgjob = NULL; 4441556Srgrimes for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { 4451556Srgrimes if (ps->cmd != nullstr) 4461556Srgrimes ckfree(ps->cmd); 4471556Srgrimes } 4481556Srgrimes if (jp->ps != &jp->ps0) 4491556Srgrimes ckfree(jp->ps); 4501556Srgrimes jp->used = 0; 4511556Srgrimes#if JOBS 45297659Stjr deljob(jp); 4531556Srgrimes#endif 4541556Srgrimes INTON; 4551556Srgrimes} 4561556Srgrimes 4571556Srgrimes 4581556Srgrimes 4591556Srgrimesint 460248349Sjilleswaitcmd(int argc __unused, char **argv __unused) 46117987Speter{ 4621556Srgrimes struct job *job; 463251429Sjilles int retval; 4641556Srgrimes 465248349Sjilles nextopt(""); 466251429Sjilles if (*argptr == NULL) 467251429Sjilles return (waitcmdloop(NULL)); 468251429Sjilles 469251429Sjilles do { 470251430Sjilles job = getjob_nonotfound(*argptr); 471251430Sjilles if (job == NULL) 472251430Sjilles retval = 127; 473251430Sjilles else 474251430Sjilles retval = waitcmdloop(job); 475251429Sjilles argptr++; 476251429Sjilles } while (*argptr != NULL); 47738536Scracauer 478251429Sjilles return (retval); 479251429Sjilles} 480251429Sjilles 481251429Sjillesstatic int 482251429Sjilleswaitcmdloop(struct job *job) 483251429Sjilles{ 484255157Sjilles int status, retval, sig; 485251429Sjilles struct job *jp; 486251429Sjilles 48738536Scracauer /* 48838536Scracauer * Loop until a process is terminated or stopped, or a SIGINT is 48938536Scracauer * received. 49038536Scracauer */ 49138536Scracauer 49238536Scracauer do { 4931556Srgrimes if (job != NULL) { 494254767Sjilles if (job->state == JOBDONE) { 4951556Srgrimes status = job->ps[job->nprocs - 1].status; 49626104Ssteve if (WIFEXITED(status)) 49726104Ssteve retval = WEXITSTATUS(status); 4981556Srgrimes else 49926104Ssteve retval = WTERMSIG(status) + 128; 500209600Sjilles if (! iflag || ! job->changed) 5011556Srgrimes freejob(job); 502209600Sjilles else { 503209600Sjilles job->remembered = 0; 504209600Sjilles if (job == bgjob) 505209600Sjilles bgjob = NULL; 506209600Sjilles } 50726104Ssteve return retval; 5081556Srgrimes } 5091556Srgrimes } else { 510209600Sjilles for (jp = jobtab ; jp < jobtab + njobs; jp++) 511209600Sjilles if (jp->used && jp->state == JOBDONE) { 512209600Sjilles if (! iflag || ! jp->changed) 513209600Sjilles freejob(jp); 514209600Sjilles else { 515209600Sjilles jp->remembered = 0; 516209600Sjilles if (jp == bgjob) 517209600Sjilles bgjob = NULL; 518209600Sjilles } 519209600Sjilles } 5201556Srgrimes for (jp = jobtab ; ; jp++) { 5211556Srgrimes if (jp >= jobtab + njobs) { /* no running procs */ 5221556Srgrimes return 0; 5231556Srgrimes } 5241556Srgrimes if (jp->used && jp->state == 0) 5251556Srgrimes break; 5261556Srgrimes } 5271556Srgrimes } 528238888Sjilles } while (dowait(DOWAIT_BLOCK | DOWAIT_SIG, (struct job *)NULL) != -1); 52938521Scracauer 530255157Sjilles sig = pendingsig_waitcmd; 531255157Sjilles pendingsig_waitcmd = 0; 532255157Sjilles return sig + 128; 5331556Srgrimes} 5341556Srgrimes 5351556Srgrimes 5361556Srgrimes 53717987Speterint 538254413Sjillesjobidcmd(int argc __unused, char **argv __unused) 53917987Speter{ 5401556Srgrimes struct job *jp; 5411556Srgrimes int i; 5421556Srgrimes 543254413Sjilles nextopt(""); 544254413Sjilles jp = getjob(*argptr); 5451556Srgrimes for (i = 0 ; i < jp->nprocs ; ) { 546100308Stjr out1fmt("%d", (int)jp->ps[i].pid); 5471556Srgrimes out1c(++i < jp->nprocs? ' ' : '\n'); 5481556Srgrimes } 5491556Srgrimes return 0; 5501556Srgrimes} 5511556Srgrimes 5521556Srgrimes 5531556Srgrimes 5541556Srgrimes/* 5551556Srgrimes * Convert a job name to a job structure. 5561556Srgrimes */ 5571556Srgrimes 558213811Sobrienstatic struct job * 559264168Sjillesgetjob_nonotfound(const char *name) 56090111Simp{ 5611556Srgrimes int jobno; 56297688Stjr struct job *found, *jp; 563100308Stjr pid_t pid; 5641556Srgrimes int i; 5651556Srgrimes 5661556Srgrimes if (name == NULL) { 5671556Srgrimes#if JOBS 56897659Stjrcurrentjob: if ((jp = getcurjob(NULL)) == NULL) 5691556Srgrimes error("No current job"); 57097659Stjr return (jp); 5711556Srgrimes#else 5721556Srgrimes error("No current job"); 5731556Srgrimes#endif 5741556Srgrimes } else if (name[0] == '%') { 5751556Srgrimes if (is_digit(name[1])) { 5761556Srgrimes jobno = number(name + 1); 5771556Srgrimes if (jobno > 0 && jobno <= njobs 5781556Srgrimes && jobtab[jobno - 1].used != 0) 5791556Srgrimes return &jobtab[jobno - 1]; 5801556Srgrimes#if JOBS 5811556Srgrimes } else if (name[1] == '%' && name[2] == '\0') { 5821556Srgrimes goto currentjob; 58397688Stjr } else if (name[1] == '+' && name[2] == '\0') { 58497688Stjr goto currentjob; 58597688Stjr } else if (name[1] == '-' && name[2] == '\0') { 58697688Stjr if ((jp = getcurjob(NULL)) == NULL || 58797688Stjr (jp = getcurjob(jp)) == NULL) 58897688Stjr error("No previous job"); 58997688Stjr return (jp); 5901556Srgrimes#endif 59197688Stjr } else if (name[1] == '?') { 59297688Stjr found = NULL; 59397688Stjr for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 59497688Stjr if (jp->used && jp->nprocs > 0 59597688Stjr && strstr(jp->ps[0].cmd, name + 2) != NULL) { 59697688Stjr if (found) 59797688Stjr error("%s: ambiguous", name); 59897688Stjr found = jp; 59997688Stjr } 60097688Stjr } 60197688Stjr if (found != NULL) 60297688Stjr return (found); 6031556Srgrimes } else { 60497688Stjr found = NULL; 6051556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 6061556Srgrimes if (jp->used && jp->nprocs > 0 6071556Srgrimes && prefix(name + 1, jp->ps[0].cmd)) { 6081556Srgrimes if (found) 6091556Srgrimes error("%s: ambiguous", name); 6101556Srgrimes found = jp; 6111556Srgrimes } 6121556Srgrimes } 6131556Srgrimes if (found) 6141556Srgrimes return found; 6151556Srgrimes } 6161556Srgrimes } else if (is_number(name)) { 617100308Stjr pid = (pid_t)number(name); 6181556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 6191556Srgrimes if (jp->used && jp->nprocs > 0 6201556Srgrimes && jp->ps[jp->nprocs - 1].pid == pid) 6211556Srgrimes return jp; 6221556Srgrimes } 6231556Srgrimes } 62417987Speter return NULL; 6251556Srgrimes} 6261556Srgrimes 6271556Srgrimes 628251430Sjillesstatic struct job * 629264168Sjillesgetjob(const char *name) 630251430Sjilles{ 631251430Sjilles struct job *jp; 632251430Sjilles 633251430Sjilles jp = getjob_nonotfound(name); 634251430Sjilles if (jp == NULL) 635251430Sjilles error("No such job: %s", name); 636251430Sjilles return (jp); 637251430Sjilles} 638251430Sjilles 639251430Sjilles 640216629Sjillespid_t 641216629Sjillesgetjobpgrp(char *name) 642216629Sjilles{ 643216629Sjilles struct job *jp; 6441556Srgrimes 645216629Sjilles jp = getjob(name); 646216629Sjilles return -jp->ps[0].pid; 647216629Sjilles} 648216629Sjilles 6491556Srgrimes/* 6501556Srgrimes * Return a new job structure, 6511556Srgrimes */ 6521556Srgrimes 6531556Srgrimesstruct job * 65490111Simpmakejob(union node *node __unused, int nprocs) 65517987Speter{ 6561556Srgrimes int i; 6571556Srgrimes struct job *jp; 6581556Srgrimes 6591556Srgrimes for (i = njobs, jp = jobtab ; ; jp++) { 6601556Srgrimes if (--i < 0) { 6611556Srgrimes INTOFF; 6621556Srgrimes if (njobs == 0) { 6631556Srgrimes jobtab = ckmalloc(4 * sizeof jobtab[0]); 66497664Stjr#if JOBS 66597659Stjr jobmru = NULL; 66697664Stjr#endif 6671556Srgrimes } else { 6681556Srgrimes jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); 66917987Speter memcpy(jp, jobtab, njobs * sizeof jp[0]); 67097659Stjr#if JOBS 67197659Stjr /* Relocate `next' pointers and list head */ 67299760Stjr if (jobmru != NULL) 67399760Stjr jobmru = &jp[jobmru - jobtab]; 67497659Stjr for (i = 0; i < njobs; i++) 67597659Stjr if (jp[i].next != NULL) 67697659Stjr jp[i].next = &jp[jp[i].next - 67797659Stjr jobtab]; 67897659Stjr#endif 679209600Sjilles if (bgjob != NULL) 680209600Sjilles bgjob = &jp[bgjob - jobtab]; 68120425Ssteve /* Relocate `ps' pointers */ 68220425Ssteve for (i = 0; i < njobs; i++) 68320425Ssteve if (jp[i].ps == &jobtab[i].ps0) 68420425Ssteve jp[i].ps = &jp[i].ps0; 6851556Srgrimes ckfree(jobtab); 6861556Srgrimes jobtab = jp; 6871556Srgrimes } 6881556Srgrimes jp = jobtab + njobs; 689248980Sjilles for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0) 690248980Sjilles ; 6911556Srgrimes INTON; 6921556Srgrimes break; 6931556Srgrimes } 6941556Srgrimes if (jp->used == 0) 6951556Srgrimes break; 6961556Srgrimes } 6971556Srgrimes INTOFF; 6981556Srgrimes jp->state = 0; 6991556Srgrimes jp->used = 1; 7001556Srgrimes jp->changed = 0; 7011556Srgrimes jp->nprocs = 0; 702100305Stjr jp->foreground = 0; 703209600Sjilles jp->remembered = 0; 7041556Srgrimes#if JOBS 7051556Srgrimes jp->jobctl = jobctl; 70697659Stjr jp->next = NULL; 7071556Srgrimes#endif 7081556Srgrimes if (nprocs > 1) { 7091556Srgrimes jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); 7101556Srgrimes } else { 7111556Srgrimes jp->ps = &jp->ps0; 7121556Srgrimes } 7131556Srgrimes INTON; 714213775Sjhb TRACE(("makejob(%p, %d) returns %%%td\n", (void *)node, nprocs, 71517987Speter jp - jobtab + 1)); 7161556Srgrimes return jp; 7178855Srgrimes} 7181556Srgrimes 71997659Stjr#if JOBS 720213811Sobrienstatic void 72197659Stjrsetcurjob(struct job *cj) 72297659Stjr{ 72397659Stjr struct job *jp, *prev; 7241556Srgrimes 72597659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 72697659Stjr if (jp == cj) { 72797659Stjr if (prev != NULL) 72897659Stjr prev->next = jp->next; 72997659Stjr else 73097659Stjr jobmru = jp->next; 73197659Stjr jp->next = jobmru; 73297659Stjr jobmru = cj; 73397659Stjr return; 73497659Stjr } 73597659Stjr } 73697659Stjr cj->next = jobmru; 73797659Stjr jobmru = cj; 73897659Stjr} 73997659Stjr 740213811Sobrienstatic void 74197659Stjrdeljob(struct job *j) 74297659Stjr{ 74397659Stjr struct job *jp, *prev; 74497659Stjr 74597659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 74697659Stjr if (jp == j) { 74797659Stjr if (prev != NULL) 74897659Stjr prev->next = jp->next; 74997659Stjr else 75097659Stjr jobmru = jp->next; 75197659Stjr return; 75297659Stjr } 75397659Stjr } 75497659Stjr} 75597659Stjr 7561556Srgrimes/* 75797659Stjr * Return the most recently used job that isn't `nj', and preferably one 75897659Stjr * that is stopped. 75997659Stjr */ 760213811Sobrienstatic struct job * 76197659Stjrgetcurjob(struct job *nj) 76297659Stjr{ 76397659Stjr struct job *jp; 76497659Stjr 76597659Stjr /* Try to find a stopped one.. */ 76697659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 76797659Stjr if (jp->used && jp != nj && jp->state == JOBSTOPPED) 76897659Stjr return (jp); 76997659Stjr /* Otherwise the most recently used job that isn't `nj' */ 77097659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 77197659Stjr if (jp->used && jp != nj) 77297659Stjr return (jp); 77397659Stjr 77497659Stjr return (NULL); 77597659Stjr} 77697659Stjr 77797659Stjr#endif 77897659Stjr 77997659Stjr/* 7801556Srgrimes * Fork of a subshell. If we are doing job control, give the subshell its 7811556Srgrimes * own process group. Jp is a job structure that the job is to be added to. 7821556Srgrimes * N is the command that will be evaluated by the child. Both jp and n may 7831556Srgrimes * be NULL. The mode parameter can be one of the following: 7841556Srgrimes * FORK_FG - Fork off a foreground process. 7851556Srgrimes * FORK_BG - Fork off a background process. 7861556Srgrimes * FORK_NOJOB - Like FORK_FG, but don't give the process its own 7871556Srgrimes * process group even if job control is on. 7881556Srgrimes * 7891556Srgrimes * When job control is turned off, background processes have their standard 7901556Srgrimes * input redirected to /dev/null (except for the second and later processes 7911556Srgrimes * in a pipeline). 7921556Srgrimes */ 7931556Srgrimes 794100308Stjrpid_t 79590111Simpforkshell(struct job *jp, union node *n, int mode) 79617987Speter{ 797100308Stjr pid_t pid; 798100308Stjr pid_t pgrp; 7991556Srgrimes 800213775Sjhb TRACE(("forkshell(%%%td, %p, %d) called\n", jp - jobtab, (void *)n, 80117987Speter mode)); 8021556Srgrimes INTOFF; 803216208Sjilles if (mode == FORK_BG && (jp == NULL || jp->nprocs == 0)) 804208489Sjilles checkzombies(); 805112341Stjr flushall(); 8061556Srgrimes pid = fork(); 8071556Srgrimes if (pid == -1) { 8081556Srgrimes TRACE(("Fork failed, errno=%d\n", errno)); 8091556Srgrimes INTON; 81053891Scracauer error("Cannot fork: %s", strerror(errno)); 8111556Srgrimes } 8121556Srgrimes if (pid == 0) { 8131556Srgrimes struct job *p; 8141556Srgrimes int wasroot; 8151556Srgrimes int i; 8161556Srgrimes 817100308Stjr TRACE(("Child shell %d\n", (int)getpid())); 8181556Srgrimes wasroot = rootshell; 8191556Srgrimes rootshell = 0; 820200998Sjilles handler = &main_handler; 8211556Srgrimes closescript(); 8221556Srgrimes INTON; 823223024Sjilles forcelocal = 0; 8241556Srgrimes clear_traps(); 8251556Srgrimes#if JOBS 8261556Srgrimes jobctl = 0; /* do job control only in root shell */ 8271556Srgrimes if (wasroot && mode != FORK_NOJOB && mflag) { 8281556Srgrimes if (jp == NULL || jp->nprocs == 0) 8291556Srgrimes pgrp = getpid(); 8301556Srgrimes else 8311556Srgrimes pgrp = jp->ps[0].pid; 83221352Ssteve if (setpgid(0, pgrp) == 0 && mode == FORK_FG) { 8331556Srgrimes /*** this causes superfluous TIOCSPGRPS ***/ 83499762Stjr if (tcsetpgrp(ttyfd, pgrp) < 0) 83520425Ssteve error("tcsetpgrp failed, errno=%d", errno); 8361556Srgrimes } 8371556Srgrimes setsignal(SIGTSTP); 8381556Srgrimes setsignal(SIGTTOU); 8391556Srgrimes } else if (mode == FORK_BG) { 8401556Srgrimes ignoresig(SIGINT); 8411556Srgrimes ignoresig(SIGQUIT); 8421556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 8431556Srgrimes ! fd0_redirected_p ()) { 8441556Srgrimes close(0); 84569793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 846222684Sjilles error("cannot open %s: %s", 84769793Sobrien _PATH_DEVNULL, strerror(errno)); 8481556Srgrimes } 8491556Srgrimes } 8501556Srgrimes#else 8511556Srgrimes if (mode == FORK_BG) { 8521556Srgrimes ignoresig(SIGINT); 8531556Srgrimes ignoresig(SIGQUIT); 8541556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 8551556Srgrimes ! fd0_redirected_p ()) { 8561556Srgrimes close(0); 85769793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 858222684Sjilles error("cannot open %s: %s", 85969793Sobrien _PATH_DEVNULL, strerror(errno)); 8601556Srgrimes } 8611556Srgrimes } 8621556Srgrimes#endif 863102051Stjr INTOFF; 864102051Stjr for (i = njobs, p = jobtab ; --i >= 0 ; p++) 865102051Stjr if (p->used) 866102051Stjr freejob(p); 867102051Stjr INTON; 8681556Srgrimes if (wasroot && iflag) { 8691556Srgrimes setsignal(SIGINT); 8701556Srgrimes setsignal(SIGQUIT); 8711556Srgrimes setsignal(SIGTERM); 8721556Srgrimes } 8731556Srgrimes return pid; 8741556Srgrimes } 8751556Srgrimes if (rootshell && mode != FORK_NOJOB && mflag) { 8761556Srgrimes if (jp == NULL || jp->nprocs == 0) 8771556Srgrimes pgrp = pid; 8781556Srgrimes else 8791556Srgrimes pgrp = jp->ps[0].pid; 88017987Speter setpgid(pid, pgrp); 8811556Srgrimes } 882209600Sjilles if (mode == FORK_BG) { 883209600Sjilles if (bgjob != NULL && bgjob->state == JOBDONE && 884209600Sjilles !bgjob->remembered && !iflag) 885209600Sjilles freejob(bgjob); 8861556Srgrimes backgndpid = pid; /* set $! */ 887209600Sjilles bgjob = jp; 888209600Sjilles } 8891556Srgrimes if (jp) { 8901556Srgrimes struct procstat *ps = &jp->ps[jp->nprocs++]; 8911556Srgrimes ps->pid = pid; 8921556Srgrimes ps->status = -1; 8931556Srgrimes ps->cmd = nullstr; 8941556Srgrimes if (iflag && rootshell && n) 8951556Srgrimes ps->cmd = commandtext(n); 896100305Stjr jp->foreground = mode == FORK_FG; 89797659Stjr#if JOBS 89897659Stjr setcurjob(jp); 89997659Stjr#endif 9001556Srgrimes } 9011556Srgrimes INTON; 902100308Stjr TRACE(("In parent shell: child = %d\n", (int)pid)); 9031556Srgrimes return pid; 9041556Srgrimes} 9051556Srgrimes 9061556Srgrimes 907230998Sjillespid_t 908230998Sjillesvforkexecshell(struct job *jp, char **argv, char **envp, const char *path, int idx, int pip[2]) 909230998Sjilles{ 910230998Sjilles pid_t pid; 911230998Sjilles struct jmploc jmploc; 912230998Sjilles struct jmploc *savehandler; 9131556Srgrimes 914233792Sjilles TRACE(("vforkexecshell(%%%td, %s, %p) called\n", jp - jobtab, argv[0], 915233792Sjilles (void *)pip)); 916230998Sjilles INTOFF; 917230998Sjilles flushall(); 918230998Sjilles savehandler = handler; 919230998Sjilles pid = vfork(); 920230998Sjilles if (pid == -1) { 921230998Sjilles TRACE(("Vfork failed, errno=%d\n", errno)); 922230998Sjilles INTON; 923230998Sjilles error("Cannot fork: %s", strerror(errno)); 924230998Sjilles } 925230998Sjilles if (pid == 0) { 926230998Sjilles TRACE(("Child shell %d\n", (int)getpid())); 927230998Sjilles if (setjmp(jmploc.loc)) 928230998Sjilles _exit(exception == EXEXEC ? exerrno : 2); 929230998Sjilles if (pip != NULL) { 930230998Sjilles close(pip[0]); 931230998Sjilles if (pip[1] != 1) { 932230998Sjilles dup2(pip[1], 1); 933230998Sjilles close(pip[1]); 934230998Sjilles } 935230998Sjilles } 936230998Sjilles handler = &jmploc; 937230998Sjilles shellexec(argv, envp, path, idx); 938230998Sjilles } 939230998Sjilles handler = savehandler; 940230998Sjilles if (jp) { 941230998Sjilles struct procstat *ps = &jp->ps[jp->nprocs++]; 942230998Sjilles ps->pid = pid; 943230998Sjilles ps->status = -1; 944230998Sjilles ps->cmd = nullstr; 945230998Sjilles jp->foreground = 1; 946230998Sjilles#if JOBS 947230998Sjilles setcurjob(jp); 948230998Sjilles#endif 949230998Sjilles } 950230998Sjilles INTON; 951230998Sjilles TRACE(("In parent shell: child = %d\n", (int)pid)); 952230998Sjilles return pid; 953230998Sjilles} 954230998Sjilles 955230998Sjilles 9561556Srgrimes/* 9571556Srgrimes * Wait for job to finish. 9581556Srgrimes * 9591556Srgrimes * Under job control we have the problem that while a child process is 9601556Srgrimes * running interrupts generated by the user are sent to the child but not 9611556Srgrimes * to the shell. This means that an infinite loop started by an inter- 9621556Srgrimes * active user may be hard to kill. With job control turned off, an 9631556Srgrimes * interactive user may place an interactive program inside a loop. If 9641556Srgrimes * the interactive program catches interrupts, the user doesn't want 9651556Srgrimes * these interrupts to also abort the loop. The approach we take here 9661556Srgrimes * is to have the shell ignore interrupt signals while waiting for a 96746684Skris * foreground process to terminate, and then send itself an interrupt 9681556Srgrimes * signal if the child process was terminated by an interrupt signal. 9691556Srgrimes * Unfortunately, some programs want to do a bit of cleanup and then 9701556Srgrimes * exit on interrupt; unless these processes terminate themselves by 9711556Srgrimes * sending a signal to themselves (instead of calling exit) they will 9721556Srgrimes * confuse this approach. 9731556Srgrimes */ 9741556Srgrimes 9751556Srgrimesint 97690111Simpwaitforjob(struct job *jp, int *origstatus) 97745916Scracauer{ 9781556Srgrimes#if JOBS 979208881Sjilles int propagate_int = jp->jobctl && jp->foreground; 9801556Srgrimes#endif 9811556Srgrimes int status; 9821556Srgrimes int st; 9831556Srgrimes 9841556Srgrimes INTOFF; 985213775Sjhb TRACE(("waitforjob(%%%td) called\n", jp - jobtab + 1)); 98638950Scracauer while (jp->state == 0) 987255157Sjilles if (dowait(DOWAIT_BLOCK | (Tflag ? DOWAIT_SIG | 988255157Sjilles DOWAIT_SIG_ANY : 0), jp) == -1) 98938950Scracauer dotrap(); 9901556Srgrimes#if JOBS 9911556Srgrimes if (jp->jobctl) { 992262951Sjmmv if (tcsetpgrp(ttyfd, rootpid) < 0) 99320425Ssteve error("tcsetpgrp failed, errno=%d\n", errno); 9941556Srgrimes } 9951556Srgrimes if (jp->state == JOBSTOPPED) 99697659Stjr setcurjob(jp); 9971556Srgrimes#endif 9981556Srgrimes status = jp->ps[jp->nprocs - 1].status; 99945916Scracauer if (origstatus != NULL) 100045916Scracauer *origstatus = status; 10011556Srgrimes /* convert to 8 bits */ 100226104Ssteve if (WIFEXITED(status)) 100326104Ssteve st = WEXITSTATUS(status); 10041556Srgrimes#if JOBS 100526104Ssteve else if (WIFSTOPPED(status)) 100626104Ssteve st = WSTOPSIG(status) + 128; 10071556Srgrimes#endif 10081556Srgrimes else 100926104Ssteve st = WTERMSIG(status) + 128; 10101556Srgrimes if (! JOBS || jp->state == JOBDONE) 10111556Srgrimes freejob(jp); 101238521Scracauer if (int_pending()) { 1013216400Sjilles if (!WIFSIGNALED(status) || WTERMSIG(status) != SIGINT) 101438521Scracauer CLEAR_PENDING_INT; 101538521Scracauer } 1016208881Sjilles#if JOBS 1017208881Sjilles else if (rootshell && iflag && propagate_int && 1018208881Sjilles WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) 1019208881Sjilles kill(getpid(), SIGINT); 1020208881Sjilles#endif 10211556Srgrimes INTON; 10221556Srgrimes return st; 10231556Srgrimes} 10241556Srgrimes 10251556Srgrimes 1026238888Sjillesstatic void 1027248980Sjillesdummy_handler(int sig __unused) 1028238888Sjilles{ 1029238888Sjilles} 10301556Srgrimes 10311556Srgrimes/* 10321556Srgrimes * Wait for a process to terminate. 10331556Srgrimes */ 10341556Srgrimes 1035213811Sobrienstatic pid_t 1036238888Sjillesdowait(int mode, struct job *job) 103717987Speter{ 1038238888Sjilles struct sigaction sa, osa; 1039238888Sjilles sigset_t mask, omask; 1040100308Stjr pid_t pid; 10411556Srgrimes int status; 10421556Srgrimes struct procstat *sp; 10431556Srgrimes struct job *jp; 10441556Srgrimes struct job *thisjob; 1045244682Sjilles const char *sigstr; 10461556Srgrimes int done; 10471556Srgrimes int stopped; 104826104Ssteve int sig; 1049216217Sjilles int coredump; 1050238866Sjilles int wflags; 1051238888Sjilles int restore_sigchld; 10521556Srgrimes 1053246495Sdelphij TRACE(("dowait(%d, %p) called\n", mode, job)); 1054238888Sjilles restore_sigchld = 0; 1055238888Sjilles if ((mode & DOWAIT_SIG) != 0) { 1056238888Sjilles sigfillset(&mask); 1057238888Sjilles sigprocmask(SIG_BLOCK, &mask, &omask); 1058238888Sjilles INTOFF; 1059238888Sjilles if (!issigchldtrapped()) { 1060238888Sjilles restore_sigchld = 1; 1061238888Sjilles sa.sa_handler = dummy_handler; 1062238888Sjilles sa.sa_flags = 0; 1063238888Sjilles sigemptyset(&sa.sa_mask); 1064238888Sjilles sigaction(SIGCHLD, &sa, &osa); 1065238888Sjilles } 1066238888Sjilles } 10671556Srgrimes do { 1068238866Sjilles#if JOBS 1069238867Sjilles if (iflag) 1070238867Sjilles wflags = WUNTRACED | WCONTINUED; 1071238867Sjilles else 1072238866Sjilles#endif 1073238867Sjilles wflags = 0; 1074238888Sjilles if ((mode & (DOWAIT_BLOCK | DOWAIT_SIG)) != DOWAIT_BLOCK) 1075238866Sjilles wflags |= WNOHANG; 1076238866Sjilles pid = wait3(&status, wflags, (struct rusage *)NULL); 1077100308Stjr TRACE(("wait returns %d, status=%d\n", (int)pid, status)); 1078238888Sjilles if (pid == 0 && (mode & DOWAIT_SIG) != 0) { 1079255157Sjilles pid = -1; 1080255157Sjilles if (((mode & DOWAIT_SIG_ANY) != 0 ? 1081255157Sjilles pendingsig : pendingsig_waitcmd) != 0) { 1082255157Sjilles errno = EINTR; 1083255157Sjilles break; 1084255157Sjilles } 1085238888Sjilles sigsuspend(&omask); 1086238888Sjilles if (int_pending()) 1087238888Sjilles break; 1088238888Sjilles } 1089255157Sjilles } while (pid == -1 && errno == EINTR); 1090153417Smaxim if (pid == -1 && errno == ECHILD && job != NULL) 1091153417Smaxim job->state = JOBDONE; 1092238888Sjilles if ((mode & DOWAIT_SIG) != 0) { 1093238888Sjilles if (restore_sigchld) 1094238888Sjilles sigaction(SIGCHLD, &osa, NULL); 1095238888Sjilles sigprocmask(SIG_SETMASK, &omask, NULL); 1096238888Sjilles INTON; 1097238888Sjilles } 10981556Srgrimes if (pid <= 0) 10991556Srgrimes return pid; 11001556Srgrimes INTOFF; 11011556Srgrimes thisjob = NULL; 11021556Srgrimes for (jp = jobtab ; jp < jobtab + njobs ; jp++) { 1103216208Sjilles if (jp->used && jp->nprocs > 0) { 11041556Srgrimes done = 1; 11051556Srgrimes stopped = 1; 11061556Srgrimes for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { 11071556Srgrimes if (sp->pid == -1) 11081556Srgrimes continue; 11091556Srgrimes if (sp->pid == pid) { 111026104Ssteve TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", 1111100308Stjr (int)pid, sp->status, 1112100308Stjr status)); 1113238865Sjilles if (WIFCONTINUED(status)) { 1114238865Sjilles sp->status = -1; 1115238865Sjilles jp->state = 0; 1116238865Sjilles } else 1117238865Sjilles sp->status = status; 11181556Srgrimes thisjob = jp; 11191556Srgrimes } 11201556Srgrimes if (sp->status == -1) 11211556Srgrimes stopped = 0; 112226104Ssteve else if (WIFSTOPPED(sp->status)) 11231556Srgrimes done = 0; 11241556Srgrimes } 11251556Srgrimes if (stopped) { /* stopped or done */ 11261556Srgrimes int state = done? JOBDONE : JOBSTOPPED; 11271556Srgrimes if (jp->state != state) { 1128213775Sjhb TRACE(("Job %td: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); 11291556Srgrimes jp->state = state; 1130209600Sjilles if (jp != job) { 1131209600Sjilles if (done && !jp->remembered && 1132209600Sjilles !iflag && jp != bgjob) 1133209600Sjilles freejob(jp); 11341556Srgrimes#if JOBS 1135209600Sjilles else if (done) 1136209600Sjilles deljob(jp); 11371556Srgrimes#endif 1138209600Sjilles } 11391556Srgrimes } 11401556Srgrimes } 11411556Srgrimes } 11421556Srgrimes } 11431556Srgrimes INTON; 1144216217Sjilles if (!thisjob || thisjob->state == 0) 1145216217Sjilles ; 1146216217Sjilles else if ((!rootshell || !iflag || thisjob == job) && 1147216217Sjilles thisjob->foreground && thisjob->state != JOBSTOPPED) { 1148216217Sjilles sig = 0; 1149216217Sjilles coredump = 0; 1150216217Sjilles for (sp = thisjob->ps; sp < thisjob->ps + thisjob->nprocs; sp++) 1151216217Sjilles if (WIFSIGNALED(sp->status)) { 1152216217Sjilles sig = WTERMSIG(sp->status); 1153216217Sjilles coredump = WCOREDUMP(sp->status); 1154216217Sjilles } 1155216217Sjilles if (sig > 0 && sig != SIGINT && sig != SIGPIPE) { 1156244682Sjilles sigstr = strsignal(sig); 1157244682Sjilles if (sigstr != NULL) 1158244682Sjilles out2str(sigstr); 115926104Ssteve else 1160244682Sjilles out2str("Unknown signal"); 1161216217Sjilles if (coredump) 1162218105Sjilles out2str(" (core dumped)"); 1163218105Sjilles out2c('\n'); 1164218105Sjilles flushout(out2); 11651556Srgrimes } 11661556Srgrimes } else { 1167109627Stjr TRACE(("Not printing status, rootshell=%d, job=%p\n", rootshell, job)); 1168216217Sjilles thisjob->changed = 1; 11691556Srgrimes } 11701556Srgrimes return pid; 11711556Srgrimes} 11721556Srgrimes 11731556Srgrimes 11741556Srgrimes 11751556Srgrimes/* 11761556Srgrimes * return 1 if there are stopped jobs, otherwise 0 11771556Srgrimes */ 11781556Srgrimesint job_warning = 0; 11791556Srgrimesint 118090111Simpstoppedjobs(void) 11811556Srgrimes{ 118225222Ssteve int jobno; 118325222Ssteve struct job *jp; 11841556Srgrimes 11851556Srgrimes if (job_warning) 11861556Srgrimes return (0); 11871556Srgrimes for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { 11881556Srgrimes if (jp->used == 0) 11891556Srgrimes continue; 11901556Srgrimes if (jp->state == JOBSTOPPED) { 1191199629Sjilles out2fmt_flush("You have stopped jobs.\n"); 11921556Srgrimes job_warning = 2; 11931556Srgrimes return (1); 11941556Srgrimes } 11951556Srgrimes } 11961556Srgrimes 11971556Srgrimes return (0); 11981556Srgrimes} 11991556Srgrimes 1200208489Sjilles 1201213811Sobrienstatic void 1202208489Sjillescheckzombies(void) 1203208489Sjilles{ 1204208489Sjilles while (njobs > 0 && dowait(0, NULL) > 0) 1205208489Sjilles ; 1206208489Sjilles} 1207208489Sjilles 1208208489Sjilles 1209209600Sjillesint 1210209600Sjillesbackgndpidset(void) 1211209600Sjilles{ 1212209600Sjilles return backgndpid != -1; 1213209600Sjilles} 1214209600Sjilles 1215209600Sjilles 1216209600Sjillespid_t 1217209600Sjillesbackgndpidval(void) 1218209600Sjilles{ 1219223024Sjilles if (bgjob != NULL && !forcelocal) 1220209600Sjilles bgjob->remembered = 1; 1221209600Sjilles return backgndpid; 1222209600Sjilles} 1223209600Sjilles 12241556Srgrimes/* 12251556Srgrimes * Return a string identifying a command (to be printed by the 12261556Srgrimes * jobs command. 12271556Srgrimes */ 12281556Srgrimes 1229213760Sobrienstatic char *cmdnextc; 1230213760Sobrienstatic int cmdnleft; 12311556Srgrimes#define MAXCMDTEXT 200 12321556Srgrimes 12331556Srgrimeschar * 123490111Simpcommandtext(union node *n) 123590111Simp{ 12361556Srgrimes char *name; 12371556Srgrimes 12381556Srgrimes cmdnextc = name = ckmalloc(MAXCMDTEXT); 12391556Srgrimes cmdnleft = MAXCMDTEXT - 4; 12401556Srgrimes cmdtxt(n); 12411556Srgrimes *cmdnextc = '\0'; 12421556Srgrimes return name; 12431556Srgrimes} 12441556Srgrimes 12451556Srgrimes 1246213811Sobrienstatic void 124790111Simpcmdtxt(union node *n) 124890111Simp{ 12491556Srgrimes union node *np; 12501556Srgrimes struct nodelist *lp; 1251201053Sjilles const char *p; 12521556Srgrimes int i; 12531556Srgrimes char s[2]; 12541556Srgrimes 12551556Srgrimes if (n == NULL) 12561556Srgrimes return; 12571556Srgrimes switch (n->type) { 12581556Srgrimes case NSEMI: 12591556Srgrimes cmdtxt(n->nbinary.ch1); 12601556Srgrimes cmdputs("; "); 12611556Srgrimes cmdtxt(n->nbinary.ch2); 12621556Srgrimes break; 12631556Srgrimes case NAND: 12641556Srgrimes cmdtxt(n->nbinary.ch1); 12651556Srgrimes cmdputs(" && "); 12661556Srgrimes cmdtxt(n->nbinary.ch2); 12671556Srgrimes break; 12681556Srgrimes case NOR: 12691556Srgrimes cmdtxt(n->nbinary.ch1); 12701556Srgrimes cmdputs(" || "); 12711556Srgrimes cmdtxt(n->nbinary.ch2); 12721556Srgrimes break; 12731556Srgrimes case NPIPE: 12741556Srgrimes for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 12751556Srgrimes cmdtxt(lp->n); 12761556Srgrimes if (lp->next) 12771556Srgrimes cmdputs(" | "); 12781556Srgrimes } 12791556Srgrimes break; 12801556Srgrimes case NSUBSHELL: 12811556Srgrimes cmdputs("("); 12821556Srgrimes cmdtxt(n->nredir.n); 12831556Srgrimes cmdputs(")"); 12841556Srgrimes break; 12851556Srgrimes case NREDIR: 12861556Srgrimes case NBACKGND: 12871556Srgrimes cmdtxt(n->nredir.n); 12881556Srgrimes break; 12891556Srgrimes case NIF: 12901556Srgrimes cmdputs("if "); 12911556Srgrimes cmdtxt(n->nif.test); 12921556Srgrimes cmdputs("; then "); 12931556Srgrimes cmdtxt(n->nif.ifpart); 12941556Srgrimes cmdputs("..."); 12951556Srgrimes break; 12961556Srgrimes case NWHILE: 12971556Srgrimes cmdputs("while "); 12981556Srgrimes goto until; 12991556Srgrimes case NUNTIL: 13001556Srgrimes cmdputs("until "); 13011556Srgrimesuntil: 13021556Srgrimes cmdtxt(n->nbinary.ch1); 13031556Srgrimes cmdputs("; do "); 13041556Srgrimes cmdtxt(n->nbinary.ch2); 13051556Srgrimes cmdputs("; done"); 13061556Srgrimes break; 13071556Srgrimes case NFOR: 13081556Srgrimes cmdputs("for "); 13091556Srgrimes cmdputs(n->nfor.var); 13101556Srgrimes cmdputs(" in ..."); 13111556Srgrimes break; 13121556Srgrimes case NCASE: 13131556Srgrimes cmdputs("case "); 13141556Srgrimes cmdputs(n->ncase.expr->narg.text); 13151556Srgrimes cmdputs(" in ..."); 13161556Srgrimes break; 13171556Srgrimes case NDEFUN: 13181556Srgrimes cmdputs(n->narg.text); 13191556Srgrimes cmdputs("() ..."); 13201556Srgrimes break; 1321246162Sjilles case NNOT: 1322246162Sjilles cmdputs("! "); 1323246162Sjilles cmdtxt(n->nnot.com); 1324246162Sjilles break; 13251556Srgrimes case NCMD: 13261556Srgrimes for (np = n->ncmd.args ; np ; np = np->narg.next) { 13271556Srgrimes cmdtxt(np); 13281556Srgrimes if (np->narg.next) 13291556Srgrimes cmdputs(" "); 13301556Srgrimes } 13311556Srgrimes for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { 13321556Srgrimes cmdputs(" "); 13331556Srgrimes cmdtxt(np); 13341556Srgrimes } 13351556Srgrimes break; 13361556Srgrimes case NARG: 13371556Srgrimes cmdputs(n->narg.text); 13381556Srgrimes break; 13391556Srgrimes case NTO: 13401556Srgrimes p = ">"; i = 1; goto redir; 13411556Srgrimes case NAPPEND: 13421556Srgrimes p = ">>"; i = 1; goto redir; 13431556Srgrimes case NTOFD: 13441556Srgrimes p = ">&"; i = 1; goto redir; 134596922Stjr case NCLOBBER: 134696922Stjr p = ">|"; i = 1; goto redir; 13471556Srgrimes case NFROM: 13481556Srgrimes p = "<"; i = 0; goto redir; 134966612Sbrian case NFROMTO: 135066612Sbrian p = "<>"; i = 0; goto redir; 13511556Srgrimes case NFROMFD: 13521556Srgrimes p = "<&"; i = 0; goto redir; 13531556Srgrimesredir: 13541556Srgrimes if (n->nfile.fd != i) { 13551556Srgrimes s[0] = n->nfile.fd + '0'; 13561556Srgrimes s[1] = '\0'; 13571556Srgrimes cmdputs(s); 13581556Srgrimes } 13591556Srgrimes cmdputs(p); 13601556Srgrimes if (n->type == NTOFD || n->type == NFROMFD) { 136199634Stjr if (n->ndup.dupfd >= 0) 136299634Stjr s[0] = n->ndup.dupfd + '0'; 136399634Stjr else 136499634Stjr s[0] = '-'; 13651556Srgrimes s[1] = '\0'; 13661556Srgrimes cmdputs(s); 13671556Srgrimes } else { 13681556Srgrimes cmdtxt(n->nfile.fname); 13691556Srgrimes } 13701556Srgrimes break; 13711556Srgrimes case NHERE: 13721556Srgrimes case NXHERE: 13731556Srgrimes cmdputs("<<..."); 13741556Srgrimes break; 13751556Srgrimes default: 13761556Srgrimes cmdputs("???"); 13771556Srgrimes break; 13781556Srgrimes } 13791556Srgrimes} 13801556Srgrimes 13811556Srgrimes 13821556Srgrimes 1383213811Sobrienstatic void 1384201053Sjillescmdputs(const char *s) 138590111Simp{ 1386201053Sjilles const char *p; 1387201053Sjilles char *q; 138825222Ssteve char c; 13891556Srgrimes int subtype = 0; 13901556Srgrimes 13911556Srgrimes if (cmdnleft <= 0) 13921556Srgrimes return; 13931556Srgrimes p = s; 13941556Srgrimes q = cmdnextc; 13951556Srgrimes while ((c = *p++) != '\0') { 13961556Srgrimes if (c == CTLESC) 13971556Srgrimes *q++ = *p++; 13981556Srgrimes else if (c == CTLVAR) { 13991556Srgrimes *q++ = '$'; 14001556Srgrimes if (--cmdnleft > 0) 14011556Srgrimes *q++ = '{'; 14021556Srgrimes subtype = *p++; 1403216246Sjilles if ((subtype & VSTYPE) == VSLENGTH && --cmdnleft > 0) 1404216246Sjilles *q++ = '#'; 14051556Srgrimes } else if (c == '=' && subtype != 0) { 1406216246Sjilles *q = "}-+?=##%%\0X"[(subtype & VSTYPE) - VSNORMAL]; 1407216246Sjilles if (*q) 1408216246Sjilles q++; 1409216246Sjilles else 1410216246Sjilles cmdnleft++; 1411216246Sjilles if (((subtype & VSTYPE) == VSTRIMLEFTMAX || 1412216246Sjilles (subtype & VSTYPE) == VSTRIMRIGHTMAX) && 1413216246Sjilles --cmdnleft > 0) 1414216246Sjilles *q = q[-1], q++; 14151556Srgrimes subtype = 0; 14161556Srgrimes } else if (c == CTLENDVAR) { 14171556Srgrimes *q++ = '}'; 1418216246Sjilles } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) { 1419216246Sjilles cmdnleft -= 5; 1420216246Sjilles if (cmdnleft > 0) { 1421216246Sjilles *q++ = '$'; 1422216246Sjilles *q++ = '('; 1423216246Sjilles *q++ = '.'; 1424216246Sjilles *q++ = '.'; 1425216246Sjilles *q++ = '.'; 1426216246Sjilles *q++ = ')'; 1427216246Sjilles } 1428216246Sjilles } else if (c == CTLARI) { 1429216246Sjilles cmdnleft -= 2; 1430216246Sjilles if (cmdnleft > 0) { 1431216246Sjilles *q++ = '$'; 1432216246Sjilles *q++ = '('; 1433216246Sjilles *q++ = '('; 1434216246Sjilles } 1435216246Sjilles p++; 1436216246Sjilles } else if (c == CTLENDARI) { 1437216246Sjilles if (--cmdnleft > 0) { 1438216246Sjilles *q++ = ')'; 1439216246Sjilles *q++ = ')'; 1440216246Sjilles } 1441216246Sjilles } else if (c == CTLQUOTEMARK || c == CTLQUOTEEND) 1442216246Sjilles cmdnleft++; /* ignore */ 14431556Srgrimes else 14441556Srgrimes *q++ = c; 14451556Srgrimes if (--cmdnleft <= 0) { 14461556Srgrimes *q++ = '.'; 14471556Srgrimes *q++ = '.'; 14481556Srgrimes *q++ = '.'; 14491556Srgrimes break; 14501556Srgrimes } 14511556Srgrimes } 14521556Srgrimes cmdnextc = q; 14531556Srgrimes} 1454