jobs.c revision 66612
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 * 3. All advertising materials mentioning features or use of this software 171556Srgrimes * must display the following acknowledgement: 181556Srgrimes * This product includes software developed by the University of 191556Srgrimes * California, Berkeley and its contributors. 201556Srgrimes * 4. Neither the name of the University nor the names of its contributors 211556Srgrimes * may be used to endorse or promote products derived from this software 221556Srgrimes * without specific prior written permission. 231556Srgrimes * 241556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341556Srgrimes * SUCH DAMAGE. 351556Srgrimes */ 361556Srgrimes 371556Srgrimes#ifndef lint 3836150Scharnier#if 0 3936150Scharnierstatic char sccsid[] = "@(#)jobs.c 8.5 (Berkeley) 5/4/95"; 4036150Scharnier#endif 4136150Scharnierstatic const char rcsid[] = 4250471Speter "$FreeBSD: head/bin/sh/jobs.c 66612 2000-10-03 23:13:14Z brian $"; 431556Srgrimes#endif /* not lint */ 441556Srgrimes 4517987Speter#include <fcntl.h> 4617987Speter#include <signal.h> 4717987Speter#include <errno.h> 4817987Speter#include <unistd.h> 4917987Speter#include <stdlib.h> 5017987Speter#include <sys/param.h> 5117987Speter#ifdef BSD 5217987Speter#include <sys/wait.h> 5317987Speter#include <sys/time.h> 5417987Speter#include <sys/resource.h> 5517987Speter#endif 5618018Speter#include <sys/ioctl.h> 5717987Speter 581556Srgrimes#include "shell.h" 591556Srgrimes#if JOBS 6025222Ssteve#if OLD_TTY_DRIVER 611556Srgrimes#include "sgtty.h" 6217987Speter#else 6317987Speter#include <termios.h> 6417987Speter#endif 651556Srgrimes#undef CEOF /* syntax.h redefines this */ 661556Srgrimes#endif 6717987Speter#include "redir.h" 6817987Speter#include "show.h" 691556Srgrimes#include "main.h" 701556Srgrimes#include "parser.h" 711556Srgrimes#include "nodes.h" 721556Srgrimes#include "jobs.h" 731556Srgrimes#include "options.h" 741556Srgrimes#include "trap.h" 751556Srgrimes#include "syntax.h" 761556Srgrimes#include "input.h" 771556Srgrimes#include "output.h" 781556Srgrimes#include "memalloc.h" 791556Srgrimes#include "error.h" 801556Srgrimes#include "mystring.h" 811556Srgrimes 821556Srgrimes 831556Srgrimesstruct job *jobtab; /* array of jobs */ 841556Srgrimesint njobs; /* size of array */ 8528346SsteveMKINIT pid_t backgndpid = -1; /* pid of last background process */ 861556Srgrimes#if JOBS 871556Srgrimesint initialpgrp; /* pgrp of shell on invocation */ 8828346Ssteveint curjob; /* current job */ 891556Srgrimes#endif 9038536Scracauerint in_waitcmd = 0; /* are we in waitcmd()? */ 9138950Scracauerint in_dowait = 0; /* are we in dowait()? */ 9238536Scracauervolatile sig_atomic_t breakwaitcmd = 0; /* should wait be terminated? */ 931556Srgrimes 9420425Ssteve#if JOBS 9517987SpeterSTATIC void restartjob __P((struct job *)); 9620425Ssteve#endif 9717987SpeterSTATIC void freejob __P((struct job *)); 9817987SpeterSTATIC struct job *getjob __P((char *)); 9917987SpeterSTATIC int dowait __P((int, struct job *)); 10020425Ssteve#if SYSV 10138536ScracauerSTATIC int onsigchild __P((void)); 10220425Ssteve#endif 10317987SpeterSTATIC int waitproc __P((int, int *)); 10417987SpeterSTATIC void cmdtxt __P((union node *)); 10517987SpeterSTATIC void cmdputs __P((char *)); 1061556Srgrimes 1071556Srgrimes 1081556Srgrimes/* 1091556Srgrimes * Turn job control on and off. 1101556Srgrimes * 1111556Srgrimes * Note: This code assumes that the third arg to ioctl is a character 1121556Srgrimes * pointer, which is true on Berkeley systems but not System V. Since 1131556Srgrimes * System V doesn't have job control yet, this isn't a problem now. 1141556Srgrimes */ 1151556Srgrimes 1161556SrgrimesMKINIT int jobctl; 1171556Srgrimes 11820425Ssteve#if JOBS 1191556Srgrimesvoid 12020425Sstevesetjobctl(on) 12117987Speter int on; 12217987Speter{ 1231556Srgrimes#ifdef OLD_TTY_DRIVER 1241556Srgrimes int ldisc; 1251556Srgrimes#endif 1261556Srgrimes 1271556Srgrimes if (on == jobctl || rootshell == 0) 1281556Srgrimes return; 1291556Srgrimes if (on) { 1301556Srgrimes do { /* while we are in the background */ 13120425Ssteve#ifdef OLD_TTY_DRIVER 1321556Srgrimes if (ioctl(2, TIOCGPGRP, (char *)&initialpgrp) < 0) { 13320425Ssteve#else 13420425Ssteve initialpgrp = tcgetpgrp(2); 13520425Ssteve if (initialpgrp < 0) { 13620425Ssteve#endif 1371556Srgrimes out2str("sh: can't access tty; job control turned off\n"); 1381556Srgrimes mflag = 0; 1391556Srgrimes return; 1401556Srgrimes } 1411556Srgrimes if (initialpgrp == -1) 14217987Speter initialpgrp = getpgrp(); 14317987Speter else if (initialpgrp != getpgrp()) { 1441556Srgrimes killpg(initialpgrp, SIGTTIN); 1451556Srgrimes continue; 1461556Srgrimes } 1471556Srgrimes } while (0); 1481556Srgrimes#ifdef OLD_TTY_DRIVER 1491556Srgrimes if (ioctl(2, TIOCGETD, (char *)&ldisc) < 0 || ldisc != NTTYDISC) { 1501556Srgrimes out2str("sh: need new tty driver to run job control; job control turned off\n"); 1511556Srgrimes mflag = 0; 1521556Srgrimes return; 1531556Srgrimes } 1541556Srgrimes#endif 1551556Srgrimes setsignal(SIGTSTP); 1561556Srgrimes setsignal(SIGTTOU); 1571556Srgrimes setsignal(SIGTTIN); 15817987Speter setpgid(0, rootpid); 15920425Ssteve#ifdef OLD_TTY_DRIVER 1601556Srgrimes ioctl(2, TIOCSPGRP, (char *)&rootpid); 16120425Ssteve#else 16220425Ssteve tcsetpgrp(2, rootpid); 16320425Ssteve#endif 1641556Srgrimes } else { /* turning job control off */ 16517987Speter setpgid(0, initialpgrp); 16620425Ssteve#ifdef OLD_TTY_DRIVER 1671556Srgrimes ioctl(2, TIOCSPGRP, (char *)&initialpgrp); 16820425Ssteve#else 16920425Ssteve tcsetpgrp(2, initialpgrp); 17020425Ssteve#endif 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; 1861556Srgrimes#if JOBS 1871556Srgrimes jobctl = 0; 1881556Srgrimes#endif 1891556Srgrimes} 1901556Srgrimes 1911556Srgrimes#endif 1921556Srgrimes 1931556Srgrimes 1941556Srgrimes 1951556Srgrimes#if JOBS 19617987Speterint 19717987Speterfgcmd(argc, argv) 19825905Ssteve int argc __unused; 19920425Ssteve char **argv; 20017987Speter{ 2011556Srgrimes struct job *jp; 2021556Srgrimes int pgrp; 2031556Srgrimes int status; 2041556Srgrimes 2051556Srgrimes jp = getjob(argv[1]); 2061556Srgrimes if (jp->jobctl == 0) 2071556Srgrimes error("job not created under job control"); 2081556Srgrimes pgrp = jp->ps[0].pid; 20920425Ssteve#ifdef OLD_TTY_DRIVER 2101556Srgrimes ioctl(2, TIOCSPGRP, (char *)&pgrp); 21120425Ssteve#else 21220425Ssteve tcsetpgrp(2, pgrp); 21320425Ssteve#endif 2141556Srgrimes restartjob(jp); 2151556Srgrimes INTOFF; 21645916Scracauer status = waitforjob(jp, (int *)NULL); 2171556Srgrimes INTON; 2181556Srgrimes return status; 2191556Srgrimes} 2201556Srgrimes 2211556Srgrimes 22217987Speterint 22317987Speterbgcmd(argc, argv) 22417987Speter int argc; 22520425Ssteve char **argv; 22617987Speter{ 2271556Srgrimes struct job *jp; 2281556Srgrimes 2291556Srgrimes do { 2301556Srgrimes jp = getjob(*++argv); 2311556Srgrimes if (jp->jobctl == 0) 2321556Srgrimes error("job not created under job control"); 2331556Srgrimes restartjob(jp); 2341556Srgrimes } while (--argc > 1); 2351556Srgrimes return 0; 2361556Srgrimes} 2371556Srgrimes 2381556Srgrimes 2391556SrgrimesSTATIC void 2401556Srgrimesrestartjob(jp) 2411556Srgrimes struct job *jp; 24217987Speter{ 2431556Srgrimes struct procstat *ps; 2441556Srgrimes int i; 2451556Srgrimes 2461556Srgrimes if (jp->state == JOBDONE) 2471556Srgrimes return; 2481556Srgrimes INTOFF; 2491556Srgrimes killpg(jp->ps[0].pid, SIGCONT); 2501556Srgrimes for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 25126104Ssteve if (WIFSTOPPED(ps->status)) { 2521556Srgrimes ps->status = -1; 2531556Srgrimes jp->state = 0; 2541556Srgrimes } 2551556Srgrimes } 2561556Srgrimes INTON; 2571556Srgrimes} 2581556Srgrimes#endif 2591556Srgrimes 2601556Srgrimes 2611556Srgrimesint 26217987Speterjobscmd(argc, argv) 26325905Ssteve int argc __unused; 26425905Ssteve char **argv __unused; 26517987Speter{ 2661556Srgrimes showjobs(0); 2671556Srgrimes return 0; 2681556Srgrimes} 2691556Srgrimes 2701556Srgrimes 2711556Srgrimes/* 2721556Srgrimes * Print a list of jobs. If "change" is nonzero, only print jobs whose 2731556Srgrimes * statuses have changed since the last call to showjobs. 2741556Srgrimes * 2751556Srgrimes * If the shell is interrupted in the process of creating a job, the 2761556Srgrimes * result may be a job structure containing zero processes. Such structures 2771556Srgrimes * will be freed here. 2781556Srgrimes */ 2791556Srgrimes 2801556Srgrimesvoid 28120425Ssteveshowjobs(change) 28217987Speter int change; 28317987Speter{ 2841556Srgrimes int jobno; 2851556Srgrimes int procno; 2861556Srgrimes int i; 2871556Srgrimes struct job *jp; 2881556Srgrimes struct procstat *ps; 2891556Srgrimes int col; 2901556Srgrimes char s[64]; 2911556Srgrimes 2921556Srgrimes TRACE(("showjobs(%d) called\n", change)); 2931556Srgrimes while (dowait(0, (struct job *)NULL) > 0); 2941556Srgrimes for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) { 2951556Srgrimes if (! jp->used) 2961556Srgrimes continue; 2971556Srgrimes if (jp->nprocs == 0) { 2981556Srgrimes freejob(jp); 2991556Srgrimes continue; 3001556Srgrimes } 3011556Srgrimes if (change && ! jp->changed) 3021556Srgrimes continue; 3031556Srgrimes procno = jp->nprocs; 3041556Srgrimes for (ps = jp->ps ; ; ps++) { /* for each process */ 3051556Srgrimes if (ps == jp->ps) 3061556Srgrimes fmtstr(s, 64, "[%d] %d ", jobno, ps->pid); 3071556Srgrimes else 3081556Srgrimes fmtstr(s, 64, " %d ", ps->pid); 3091556Srgrimes out1str(s); 3101556Srgrimes col = strlen(s); 3111556Srgrimes s[0] = '\0'; 3121556Srgrimes if (ps->status == -1) { 3131556Srgrimes /* don't print anything */ 31426104Ssteve } else if (WIFEXITED(ps->status)) { 31526104Ssteve fmtstr(s, 64, "Exit %d", WEXITSTATUS(ps->status)); 3161556Srgrimes } else { 3171556Srgrimes#if JOBS 31826104Ssteve if (WIFSTOPPED(ps->status)) 31926104Ssteve i = WSTOPSIG(ps->status); 32026104Ssteve else 3211556Srgrimes#endif 32226104Ssteve i = WTERMSIG(ps->status); 32317987Speter if ((i & 0x7F) < NSIG && sys_siglist[i & 0x7F]) 32417987Speter scopy(sys_siglist[i & 0x7F], s); 3251556Srgrimes else 3261556Srgrimes fmtstr(s, 64, "Signal %d", i & 0x7F); 32726104Ssteve if (WCOREDUMP(ps->status)) 3281556Srgrimes strcat(s, " (core dumped)"); 3291556Srgrimes } 3301556Srgrimes out1str(s); 3311556Srgrimes col += strlen(s); 3321556Srgrimes do { 3331556Srgrimes out1c(' '); 3341556Srgrimes col++; 3351556Srgrimes } while (col < 30); 3361556Srgrimes out1str(ps->cmd); 3371556Srgrimes out1c('\n'); 3381556Srgrimes if (--procno <= 0) 3391556Srgrimes break; 3401556Srgrimes } 3411556Srgrimes jp->changed = 0; 3421556Srgrimes if (jp->state == JOBDONE) { 3431556Srgrimes freejob(jp); 3441556Srgrimes } 3451556Srgrimes } 3461556Srgrimes} 3471556Srgrimes 3481556Srgrimes 3491556Srgrimes/* 3501556Srgrimes * Mark a job structure as unused. 3511556Srgrimes */ 3521556Srgrimes 3531556SrgrimesSTATIC void 3541556Srgrimesfreejob(jp) 3551556Srgrimes struct job *jp; 3561556Srgrimes { 3571556Srgrimes struct procstat *ps; 3581556Srgrimes int i; 3591556Srgrimes 3601556Srgrimes INTOFF; 3611556Srgrimes for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { 3621556Srgrimes if (ps->cmd != nullstr) 3631556Srgrimes ckfree(ps->cmd); 3641556Srgrimes } 3651556Srgrimes if (jp->ps != &jp->ps0) 3661556Srgrimes ckfree(jp->ps); 3671556Srgrimes jp->used = 0; 3681556Srgrimes#if JOBS 3691556Srgrimes if (curjob == jp - jobtab + 1) 3701556Srgrimes curjob = 0; 3711556Srgrimes#endif 3721556Srgrimes INTON; 3731556Srgrimes} 3741556Srgrimes 3751556Srgrimes 3761556Srgrimes 3771556Srgrimesint 37820425Sstevewaitcmd(argc, argv) 37917987Speter int argc; 38020425Ssteve char **argv; 38117987Speter{ 3821556Srgrimes struct job *job; 38326104Ssteve int status, retval; 3841556Srgrimes struct job *jp; 3851556Srgrimes 3861556Srgrimes if (argc > 1) { 3871556Srgrimes job = getjob(argv[1]); 3881556Srgrimes } else { 3891556Srgrimes job = NULL; 3901556Srgrimes } 39138536Scracauer 39238536Scracauer /* 39338536Scracauer * Loop until a process is terminated or stopped, or a SIGINT is 39438536Scracauer * received. 39538536Scracauer */ 39638536Scracauer 39738521Scracauer in_waitcmd++; 39838536Scracauer do { 3991556Srgrimes if (job != NULL) { 4001556Srgrimes if (job->state) { 4011556Srgrimes status = job->ps[job->nprocs - 1].status; 40226104Ssteve if (WIFEXITED(status)) 40326104Ssteve retval = WEXITSTATUS(status); 4041556Srgrimes#if JOBS 40526104Ssteve else if (WIFSTOPPED(status)) 40626104Ssteve retval = WSTOPSIG(status) + 128; 4071556Srgrimes#endif 4081556Srgrimes else 40926104Ssteve retval = WTERMSIG(status) + 128; 4101556Srgrimes if (! iflag) 4111556Srgrimes freejob(job); 41238536Scracauer in_waitcmd--; 41326104Ssteve return retval; 4141556Srgrimes } 4151556Srgrimes } else { 4161556Srgrimes for (jp = jobtab ; ; jp++) { 4171556Srgrimes if (jp >= jobtab + njobs) { /* no running procs */ 41838536Scracauer in_waitcmd--; 4191556Srgrimes return 0; 4201556Srgrimes } 4211556Srgrimes if (jp->used && jp->state == 0) 4221556Srgrimes break; 4231556Srgrimes } 4241556Srgrimes } 42538521Scracauer } while (dowait(1, (struct job *)NULL) != -1); 42638521Scracauer in_waitcmd--; 42738521Scracauer 42838521Scracauer return 0; 4291556Srgrimes} 4301556Srgrimes 4311556Srgrimes 4321556Srgrimes 43317987Speterint 43420425Sstevejobidcmd(argc, argv) 43525905Ssteve int argc __unused; 43620425Ssteve char **argv; 43717987Speter{ 4381556Srgrimes struct job *jp; 4391556Srgrimes int i; 4401556Srgrimes 4411556Srgrimes jp = getjob(argv[1]); 4421556Srgrimes for (i = 0 ; i < jp->nprocs ; ) { 4431556Srgrimes out1fmt("%d", jp->ps[i].pid); 4441556Srgrimes out1c(++i < jp->nprocs? ' ' : '\n'); 4451556Srgrimes } 4461556Srgrimes return 0; 4471556Srgrimes} 4481556Srgrimes 4491556Srgrimes 4501556Srgrimes 4511556Srgrimes/* 4521556Srgrimes * Convert a job name to a job structure. 4531556Srgrimes */ 4541556Srgrimes 4551556SrgrimesSTATIC struct job * 4561556Srgrimesgetjob(name) 4571556Srgrimes char *name; 4581556Srgrimes { 4591556Srgrimes int jobno; 46025222Ssteve struct job *jp; 4611556Srgrimes int pid; 4621556Srgrimes int i; 4631556Srgrimes 4641556Srgrimes if (name == NULL) { 4651556Srgrimes#if JOBS 4661556Srgrimescurrentjob: 4671556Srgrimes if ((jobno = curjob) == 0 || jobtab[jobno - 1].used == 0) 4681556Srgrimes error("No current job"); 4691556Srgrimes return &jobtab[jobno - 1]; 4701556Srgrimes#else 4711556Srgrimes error("No current job"); 4721556Srgrimes#endif 4731556Srgrimes } else if (name[0] == '%') { 4741556Srgrimes if (is_digit(name[1])) { 4751556Srgrimes jobno = number(name + 1); 4761556Srgrimes if (jobno > 0 && jobno <= njobs 4771556Srgrimes && jobtab[jobno - 1].used != 0) 4781556Srgrimes return &jobtab[jobno - 1]; 4791556Srgrimes#if JOBS 4801556Srgrimes } else if (name[1] == '%' && name[2] == '\0') { 4811556Srgrimes goto currentjob; 4821556Srgrimes#endif 4831556Srgrimes } else { 48425222Ssteve struct job *found = NULL; 4851556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 4861556Srgrimes if (jp->used && jp->nprocs > 0 4871556Srgrimes && prefix(name + 1, jp->ps[0].cmd)) { 4881556Srgrimes if (found) 4891556Srgrimes error("%s: ambiguous", name); 4901556Srgrimes found = jp; 4911556Srgrimes } 4921556Srgrimes } 4931556Srgrimes if (found) 4941556Srgrimes return found; 4951556Srgrimes } 4961556Srgrimes } else if (is_number(name)) { 4971556Srgrimes pid = number(name); 4981556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 4991556Srgrimes if (jp->used && jp->nprocs > 0 5001556Srgrimes && jp->ps[jp->nprocs - 1].pid == pid) 5011556Srgrimes return jp; 5021556Srgrimes } 5031556Srgrimes } 5041556Srgrimes error("No such job: %s", name); 50517987Speter /*NOTREACHED*/ 50617987Speter return NULL; 5071556Srgrimes} 5081556Srgrimes 5091556Srgrimes 5101556Srgrimes 5111556Srgrimes/* 5121556Srgrimes * Return a new job structure, 5131556Srgrimes */ 5141556Srgrimes 5151556Srgrimesstruct job * 5161556Srgrimesmakejob(node, nprocs) 51725905Ssteve union node *node __unused; 51817987Speter int nprocs; 51917987Speter{ 5201556Srgrimes int i; 5211556Srgrimes struct job *jp; 5221556Srgrimes 5231556Srgrimes for (i = njobs, jp = jobtab ; ; jp++) { 5241556Srgrimes if (--i < 0) { 5251556Srgrimes INTOFF; 5261556Srgrimes if (njobs == 0) { 5271556Srgrimes jobtab = ckmalloc(4 * sizeof jobtab[0]); 5281556Srgrimes } else { 5291556Srgrimes jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); 53017987Speter memcpy(jp, jobtab, njobs * sizeof jp[0]); 53120425Ssteve /* Relocate `ps' pointers */ 53220425Ssteve for (i = 0; i < njobs; i++) 53320425Ssteve if (jp[i].ps == &jobtab[i].ps0) 53420425Ssteve jp[i].ps = &jp[i].ps0; 5351556Srgrimes ckfree(jobtab); 5361556Srgrimes jobtab = jp; 5371556Srgrimes } 5381556Srgrimes jp = jobtab + njobs; 5391556Srgrimes for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0); 5401556Srgrimes INTON; 5411556Srgrimes break; 5421556Srgrimes } 5431556Srgrimes if (jp->used == 0) 5441556Srgrimes break; 5451556Srgrimes } 5461556Srgrimes INTOFF; 5471556Srgrimes jp->state = 0; 5481556Srgrimes jp->used = 1; 5491556Srgrimes jp->changed = 0; 5501556Srgrimes jp->nprocs = 0; 5511556Srgrimes#if JOBS 5521556Srgrimes jp->jobctl = jobctl; 5531556Srgrimes#endif 5541556Srgrimes if (nprocs > 1) { 5551556Srgrimes jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); 5561556Srgrimes } else { 5571556Srgrimes jp->ps = &jp->ps0; 5581556Srgrimes } 5591556Srgrimes INTON; 56017987Speter TRACE(("makejob(0x%lx, %d) returns %%%d\n", (long)node, nprocs, 56117987Speter jp - jobtab + 1)); 5621556Srgrimes return jp; 5638855Srgrimes} 5641556Srgrimes 5651556Srgrimes 5661556Srgrimes/* 5671556Srgrimes * Fork of a subshell. If we are doing job control, give the subshell its 5681556Srgrimes * own process group. Jp is a job structure that the job is to be added to. 5691556Srgrimes * N is the command that will be evaluated by the child. Both jp and n may 5701556Srgrimes * be NULL. The mode parameter can be one of the following: 5711556Srgrimes * FORK_FG - Fork off a foreground process. 5721556Srgrimes * FORK_BG - Fork off a background process. 5731556Srgrimes * FORK_NOJOB - Like FORK_FG, but don't give the process its own 5741556Srgrimes * process group even if job control is on. 5751556Srgrimes * 5761556Srgrimes * When job control is turned off, background processes have their standard 5771556Srgrimes * input redirected to /dev/null (except for the second and later processes 5781556Srgrimes * in a pipeline). 5791556Srgrimes */ 5801556Srgrimes 5811556Srgrimesint 5821556Srgrimesforkshell(jp, n, mode) 5831556Srgrimes union node *n; 5841556Srgrimes struct job *jp; 58517987Speter int mode; 58617987Speter{ 5871556Srgrimes int pid; 5881556Srgrimes int pgrp; 5891556Srgrimes 59017987Speter TRACE(("forkshell(%%%d, 0x%lx, %d) called\n", jp - jobtab, (long)n, 59117987Speter mode)); 5921556Srgrimes INTOFF; 5931556Srgrimes pid = fork(); 5941556Srgrimes if (pid == -1) { 5951556Srgrimes TRACE(("Fork failed, errno=%d\n", errno)); 5961556Srgrimes INTON; 59753891Scracauer error("Cannot fork: %s", strerror(errno)); 5981556Srgrimes } 5991556Srgrimes if (pid == 0) { 6001556Srgrimes struct job *p; 6011556Srgrimes int wasroot; 6021556Srgrimes int i; 6031556Srgrimes 6041556Srgrimes TRACE(("Child shell %d\n", getpid())); 6051556Srgrimes wasroot = rootshell; 6061556Srgrimes rootshell = 0; 6071556Srgrimes for (i = njobs, p = jobtab ; --i >= 0 ; p++) 6081556Srgrimes if (p->used) 6091556Srgrimes freejob(p); 6101556Srgrimes closescript(); 6111556Srgrimes INTON; 6121556Srgrimes clear_traps(); 6131556Srgrimes#if JOBS 6141556Srgrimes jobctl = 0; /* do job control only in root shell */ 6151556Srgrimes if (wasroot && mode != FORK_NOJOB && mflag) { 6161556Srgrimes if (jp == NULL || jp->nprocs == 0) 6171556Srgrimes pgrp = getpid(); 6181556Srgrimes else 6191556Srgrimes pgrp = jp->ps[0].pid; 62021352Ssteve if (setpgid(0, pgrp) == 0 && mode == FORK_FG) { 6211556Srgrimes /*** this causes superfluous TIOCSPGRPS ***/ 62220425Ssteve#ifdef OLD_TTY_DRIVER 6231556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&pgrp) < 0) 62418016Speter error("TIOCSPGRP failed, errno=%d", errno); 62520425Ssteve#else 62620425Ssteve if (tcsetpgrp(2, pgrp) < 0) 62720425Ssteve error("tcsetpgrp failed, errno=%d", errno); 62820425Ssteve#endif 6291556Srgrimes } 6301556Srgrimes setsignal(SIGTSTP); 6311556Srgrimes setsignal(SIGTTOU); 6321556Srgrimes } else if (mode == FORK_BG) { 6331556Srgrimes ignoresig(SIGINT); 6341556Srgrimes ignoresig(SIGQUIT); 6351556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 6361556Srgrimes ! fd0_redirected_p ()) { 6371556Srgrimes close(0); 6381556Srgrimes if (open("/dev/null", O_RDONLY) != 0) 63953891Scracauer error("Can't open /dev/null: %s", 64053891Scracauer strerror(errno)); 6411556Srgrimes } 6421556Srgrimes } 6431556Srgrimes#else 6441556Srgrimes if (mode == FORK_BG) { 6451556Srgrimes ignoresig(SIGINT); 6461556Srgrimes ignoresig(SIGQUIT); 6471556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 6481556Srgrimes ! fd0_redirected_p ()) { 6491556Srgrimes close(0); 6501556Srgrimes if (open("/dev/null", O_RDONLY) != 0) 65153891Scracauer error("Can't open /dev/null: %s", 65253891Scracauer strerror(errno)); 6531556Srgrimes } 6541556Srgrimes } 6551556Srgrimes#endif 6561556Srgrimes if (wasroot && iflag) { 6571556Srgrimes setsignal(SIGINT); 6581556Srgrimes setsignal(SIGQUIT); 6591556Srgrimes setsignal(SIGTERM); 6601556Srgrimes } 6611556Srgrimes return pid; 6621556Srgrimes } 6631556Srgrimes if (rootshell && mode != FORK_NOJOB && mflag) { 6641556Srgrimes if (jp == NULL || jp->nprocs == 0) 6651556Srgrimes pgrp = pid; 6661556Srgrimes else 6671556Srgrimes pgrp = jp->ps[0].pid; 66817987Speter setpgid(pid, pgrp); 6691556Srgrimes } 6701556Srgrimes if (mode == FORK_BG) 6711556Srgrimes backgndpid = pid; /* set $! */ 6721556Srgrimes if (jp) { 6731556Srgrimes struct procstat *ps = &jp->ps[jp->nprocs++]; 6741556Srgrimes ps->pid = pid; 6751556Srgrimes ps->status = -1; 6761556Srgrimes ps->cmd = nullstr; 6771556Srgrimes if (iflag && rootshell && n) 6781556Srgrimes ps->cmd = commandtext(n); 6791556Srgrimes } 6801556Srgrimes INTON; 6811556Srgrimes TRACE(("In parent shell: child = %d\n", pid)); 6821556Srgrimes return pid; 6831556Srgrimes} 6841556Srgrimes 6851556Srgrimes 6861556Srgrimes 6871556Srgrimes/* 6881556Srgrimes * Wait for job to finish. 6891556Srgrimes * 6901556Srgrimes * Under job control we have the problem that while a child process is 6911556Srgrimes * running interrupts generated by the user are sent to the child but not 6921556Srgrimes * to the shell. This means that an infinite loop started by an inter- 6931556Srgrimes * active user may be hard to kill. With job control turned off, an 6941556Srgrimes * interactive user may place an interactive program inside a loop. If 6951556Srgrimes * the interactive program catches interrupts, the user doesn't want 6961556Srgrimes * these interrupts to also abort the loop. The approach we take here 6971556Srgrimes * is to have the shell ignore interrupt signals while waiting for a 69846684Skris * foreground process to terminate, and then send itself an interrupt 6991556Srgrimes * signal if the child process was terminated by an interrupt signal. 7001556Srgrimes * Unfortunately, some programs want to do a bit of cleanup and then 7011556Srgrimes * exit on interrupt; unless these processes terminate themselves by 7021556Srgrimes * sending a signal to themselves (instead of calling exit) they will 7031556Srgrimes * confuse this approach. 7041556Srgrimes */ 7051556Srgrimes 7061556Srgrimesint 70745916Scracauerwaitforjob(jp, origstatus) 70825222Ssteve struct job *jp; 70945916Scracauer int *origstatus; 71045916Scracauer{ 7111556Srgrimes#if JOBS 71217987Speter int mypgrp = getpgrp(); 7131556Srgrimes#endif 7141556Srgrimes int status; 7151556Srgrimes int st; 7161556Srgrimes 7171556Srgrimes INTOFF; 7181556Srgrimes TRACE(("waitforjob(%%%d) called\n", jp - jobtab + 1)); 71938950Scracauer while (jp->state == 0) 72038950Scracauer if (dowait(1, jp) == -1) 72138950Scracauer dotrap(); 7221556Srgrimes#if JOBS 7231556Srgrimes if (jp->jobctl) { 72420425Ssteve#ifdef OLD_TTY_DRIVER 7251556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&mypgrp) < 0) 72620425Ssteve error("TIOCSPGRP failed, errno=%d\n", errno); 72720425Ssteve#else 72820425Ssteve if (tcsetpgrp(2, mypgrp) < 0) 72920425Ssteve error("tcsetpgrp failed, errno=%d\n", errno); 73020425Ssteve#endif 7311556Srgrimes } 7321556Srgrimes if (jp->state == JOBSTOPPED) 7331556Srgrimes curjob = jp - jobtab + 1; 7341556Srgrimes#endif 7351556Srgrimes status = jp->ps[jp->nprocs - 1].status; 73645916Scracauer if (origstatus != NULL) 73745916Scracauer *origstatus = status; 7381556Srgrimes /* convert to 8 bits */ 73926104Ssteve if (WIFEXITED(status)) 74026104Ssteve st = WEXITSTATUS(status); 7411556Srgrimes#if JOBS 74226104Ssteve else if (WIFSTOPPED(status)) 74326104Ssteve st = WSTOPSIG(status) + 128; 7441556Srgrimes#endif 7451556Srgrimes else 74626104Ssteve st = WTERMSIG(status) + 128; 7471556Srgrimes if (! JOBS || jp->state == JOBDONE) 7481556Srgrimes freejob(jp); 74938521Scracauer if (int_pending()) { 75038521Scracauer if (WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) 75138521Scracauer kill(getpid(), SIGINT); 75238521Scracauer else 75338521Scracauer CLEAR_PENDING_INT; 75438521Scracauer } 7551556Srgrimes INTON; 7561556Srgrimes return st; 7571556Srgrimes} 7581556Srgrimes 7591556Srgrimes 7601556Srgrimes 7611556Srgrimes/* 7621556Srgrimes * Wait for a process to terminate. 7631556Srgrimes */ 7641556Srgrimes 7651556SrgrimesSTATIC int 7661556Srgrimesdowait(block, job) 76717987Speter int block; 7681556Srgrimes struct job *job; 76917987Speter{ 7701556Srgrimes int pid; 7711556Srgrimes int status; 7721556Srgrimes struct procstat *sp; 7731556Srgrimes struct job *jp; 7741556Srgrimes struct job *thisjob; 7751556Srgrimes int done; 7761556Srgrimes int stopped; 7771556Srgrimes int core; 77826104Ssteve int sig; 7791556Srgrimes 78038950Scracauer in_dowait++; 7811556Srgrimes TRACE(("dowait(%d) called\n", block)); 7821556Srgrimes do { 7831556Srgrimes pid = waitproc(block, &status); 7841556Srgrimes TRACE(("wait returns %d, status=%d\n", pid, status)); 78538521Scracauer } while (pid == -1 && errno == EINTR && breakwaitcmd == 0); 78638950Scracauer in_dowait--; 78738521Scracauer if (breakwaitcmd != 0) { 78838521Scracauer breakwaitcmd = 0; 78938521Scracauer return -1; 79038521Scracauer } 7911556Srgrimes if (pid <= 0) 7921556Srgrimes return pid; 7931556Srgrimes INTOFF; 7941556Srgrimes thisjob = NULL; 7951556Srgrimes for (jp = jobtab ; jp < jobtab + njobs ; jp++) { 7961556Srgrimes if (jp->used) { 7971556Srgrimes done = 1; 7981556Srgrimes stopped = 1; 7991556Srgrimes for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { 8001556Srgrimes if (sp->pid == -1) 8011556Srgrimes continue; 8021556Srgrimes if (sp->pid == pid) { 80326104Ssteve TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", 80426104Ssteve pid, sp->status, status)); 8051556Srgrimes sp->status = status; 8061556Srgrimes thisjob = jp; 8071556Srgrimes } 8081556Srgrimes if (sp->status == -1) 8091556Srgrimes stopped = 0; 81026104Ssteve else if (WIFSTOPPED(sp->status)) 8111556Srgrimes done = 0; 8121556Srgrimes } 8131556Srgrimes if (stopped) { /* stopped or done */ 8141556Srgrimes int state = done? JOBDONE : JOBSTOPPED; 8151556Srgrimes if (jp->state != state) { 8161556Srgrimes TRACE(("Job %d: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); 8171556Srgrimes jp->state = state; 8181556Srgrimes#if JOBS 8191556Srgrimes if (done && curjob == jp - jobtab + 1) 8201556Srgrimes curjob = 0; /* no current job */ 8211556Srgrimes#endif 8221556Srgrimes } 8231556Srgrimes } 8241556Srgrimes } 8251556Srgrimes } 8261556Srgrimes INTON; 8271556Srgrimes if (! rootshell || ! iflag || (job && thisjob == job)) { 82826104Ssteve core = WCOREDUMP(status); 8291556Srgrimes#if JOBS 83026104Ssteve if (WIFSTOPPED(status)) 83126104Ssteve sig = WSTOPSIG(status); 83226104Ssteve else 8331556Srgrimes#endif 83426104Ssteve if (WIFEXITED(status)) 83526104Ssteve sig = 0; 83626104Ssteve else 83726104Ssteve sig = WTERMSIG(status); 83826104Ssteve 83926104Ssteve if (sig != 0 && sig != SIGINT && sig != SIGPIPE) { 8401556Srgrimes if (thisjob != job) 8411556Srgrimes outfmt(out2, "%d: ", pid); 8421556Srgrimes#if JOBS 84326104Ssteve if (sig == SIGTSTP && rootshell && iflag) 8441556Srgrimes outfmt(out2, "%%%d ", job - jobtab + 1); 8451556Srgrimes#endif 84626104Ssteve if (sig < NSIG && sys_siglist[sig]) 84726104Ssteve out2str(sys_siglist[sig]); 8481556Srgrimes else 84926104Ssteve outfmt(out2, "Signal %d", sig); 8501556Srgrimes if (core) 8511556Srgrimes out2str(" - core dumped"); 8521556Srgrimes out2c('\n'); 8531556Srgrimes flushout(&errout); 8541556Srgrimes } else { 85526104Ssteve TRACE(("Not printing status: status=%d, sig=%d\n", 85626104Ssteve status, sig)); 8571556Srgrimes } 8581556Srgrimes } else { 8591556Srgrimes TRACE(("Not printing status, rootshell=%d, job=0x%x\n", rootshell, job)); 8601556Srgrimes if (thisjob) 8611556Srgrimes thisjob->changed = 1; 8621556Srgrimes } 8631556Srgrimes return pid; 8641556Srgrimes} 8651556Srgrimes 8661556Srgrimes 8671556Srgrimes 8681556Srgrimes/* 8691556Srgrimes * Do a wait system call. If job control is compiled in, we accept 8701556Srgrimes * stopped processes. If block is zero, we return a value of zero 8711556Srgrimes * rather than blocking. 8721556Srgrimes * 8731556Srgrimes * System V doesn't have a non-blocking wait system call. It does 8741556Srgrimes * have a SIGCLD signal that is sent to a process when one of it's 8751556Srgrimes * children dies. The obvious way to use SIGCLD would be to install 8761556Srgrimes * a handler for SIGCLD which simply bumped a counter when a SIGCLD 8771556Srgrimes * was received, and have waitproc bump another counter when it got 8781556Srgrimes * the status of a process. Waitproc would then know that a wait 8791556Srgrimes * system call would not block if the two counters were different. 8801556Srgrimes * This approach doesn't work because if a process has children that 8811556Srgrimes * have not been waited for, System V will send it a SIGCLD when it 8821556Srgrimes * installs a signal handler for SIGCLD. What this means is that when 8831556Srgrimes * a child exits, the shell will be sent SIGCLD signals continuously 8841556Srgrimes * until is runs out of stack space, unless it does a wait call before 8851556Srgrimes * restoring the signal handler. The code below takes advantage of 8861556Srgrimes * this (mis)feature by installing a signal handler for SIGCLD and 8871556Srgrimes * then checking to see whether it was called. If there are any 8881556Srgrimes * children to be waited for, it will be. 8891556Srgrimes * 8901556Srgrimes * If neither SYSV nor BSD is defined, we don't implement nonblocking 8911556Srgrimes * waits at all. In this case, the user will not be informed when 8921556Srgrimes * a background process until the next time she runs a real program 8931556Srgrimes * (as opposed to running a builtin command or just typing return), 8941556Srgrimes * and the jobs command may give out of date information. 8951556Srgrimes */ 8961556Srgrimes 8971556Srgrimes#ifdef SYSV 89838521ScracauerSTATIC sig_atomic_t gotsigchild; 8991556Srgrimes 9001556SrgrimesSTATIC int onsigchild() { 9011556Srgrimes gotsigchild = 1; 9021556Srgrimes} 9031556Srgrimes#endif 9041556Srgrimes 9051556Srgrimes 9061556SrgrimesSTATIC int 9071556Srgrimeswaitproc(block, status) 90817987Speter int block; 9091556Srgrimes int *status; 91017987Speter{ 9111556Srgrimes#ifdef BSD 9121556Srgrimes int flags; 9131556Srgrimes 9141556Srgrimes#if JOBS 9151556Srgrimes flags = WUNTRACED; 9161556Srgrimes#else 9171556Srgrimes flags = 0; 9181556Srgrimes#endif 9191556Srgrimes if (block == 0) 9201556Srgrimes flags |= WNOHANG; 9211556Srgrimes return wait3(status, flags, (struct rusage *)NULL); 9221556Srgrimes#else 9231556Srgrimes#ifdef SYSV 9241556Srgrimes int (*save)(); 9251556Srgrimes 9261556Srgrimes if (block == 0) { 9271556Srgrimes gotsigchild = 0; 9281556Srgrimes save = signal(SIGCLD, onsigchild); 9291556Srgrimes signal(SIGCLD, save); 9301556Srgrimes if (gotsigchild == 0) 9311556Srgrimes return 0; 9321556Srgrimes } 9331556Srgrimes return wait(status); 9341556Srgrimes#else 9351556Srgrimes if (block == 0) 9361556Srgrimes return 0; 9371556Srgrimes return wait(status); 9381556Srgrimes#endif 9391556Srgrimes#endif 9401556Srgrimes} 9411556Srgrimes 9421556Srgrimes/* 9431556Srgrimes * return 1 if there are stopped jobs, otherwise 0 9441556Srgrimes */ 9451556Srgrimesint job_warning = 0; 9461556Srgrimesint 9471556Srgrimesstoppedjobs() 9481556Srgrimes{ 94925222Ssteve int jobno; 95025222Ssteve struct job *jp; 9511556Srgrimes 9521556Srgrimes if (job_warning) 9531556Srgrimes return (0); 9541556Srgrimes for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { 9551556Srgrimes if (jp->used == 0) 9561556Srgrimes continue; 9571556Srgrimes if (jp->state == JOBSTOPPED) { 9581556Srgrimes out2str("You have stopped jobs.\n"); 9591556Srgrimes job_warning = 2; 9601556Srgrimes return (1); 9611556Srgrimes } 9621556Srgrimes } 9631556Srgrimes 9641556Srgrimes return (0); 9651556Srgrimes} 9661556Srgrimes 9671556Srgrimes/* 9681556Srgrimes * Return a string identifying a command (to be printed by the 9691556Srgrimes * jobs command. 9701556Srgrimes */ 9711556Srgrimes 9721556SrgrimesSTATIC char *cmdnextc; 9731556SrgrimesSTATIC int cmdnleft; 9741556Srgrimes#define MAXCMDTEXT 200 9751556Srgrimes 9761556Srgrimeschar * 9771556Srgrimescommandtext(n) 9781556Srgrimes union node *n; 9791556Srgrimes { 9801556Srgrimes char *name; 9811556Srgrimes 9821556Srgrimes cmdnextc = name = ckmalloc(MAXCMDTEXT); 9831556Srgrimes cmdnleft = MAXCMDTEXT - 4; 9841556Srgrimes cmdtxt(n); 9851556Srgrimes *cmdnextc = '\0'; 9861556Srgrimes return name; 9871556Srgrimes} 9881556Srgrimes 9891556Srgrimes 9901556SrgrimesSTATIC void 9911556Srgrimescmdtxt(n) 9921556Srgrimes union node *n; 9931556Srgrimes { 9941556Srgrimes union node *np; 9951556Srgrimes struct nodelist *lp; 9961556Srgrimes char *p; 9971556Srgrimes int i; 9981556Srgrimes char s[2]; 9991556Srgrimes 10001556Srgrimes if (n == NULL) 10011556Srgrimes return; 10021556Srgrimes switch (n->type) { 10031556Srgrimes case NSEMI: 10041556Srgrimes cmdtxt(n->nbinary.ch1); 10051556Srgrimes cmdputs("; "); 10061556Srgrimes cmdtxt(n->nbinary.ch2); 10071556Srgrimes break; 10081556Srgrimes case NAND: 10091556Srgrimes cmdtxt(n->nbinary.ch1); 10101556Srgrimes cmdputs(" && "); 10111556Srgrimes cmdtxt(n->nbinary.ch2); 10121556Srgrimes break; 10131556Srgrimes case NOR: 10141556Srgrimes cmdtxt(n->nbinary.ch1); 10151556Srgrimes cmdputs(" || "); 10161556Srgrimes cmdtxt(n->nbinary.ch2); 10171556Srgrimes break; 10181556Srgrimes case NPIPE: 10191556Srgrimes for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 10201556Srgrimes cmdtxt(lp->n); 10211556Srgrimes if (lp->next) 10221556Srgrimes cmdputs(" | "); 10231556Srgrimes } 10241556Srgrimes break; 10251556Srgrimes case NSUBSHELL: 10261556Srgrimes cmdputs("("); 10271556Srgrimes cmdtxt(n->nredir.n); 10281556Srgrimes cmdputs(")"); 10291556Srgrimes break; 10301556Srgrimes case NREDIR: 10311556Srgrimes case NBACKGND: 10321556Srgrimes cmdtxt(n->nredir.n); 10331556Srgrimes break; 10341556Srgrimes case NIF: 10351556Srgrimes cmdputs("if "); 10361556Srgrimes cmdtxt(n->nif.test); 10371556Srgrimes cmdputs("; then "); 10381556Srgrimes cmdtxt(n->nif.ifpart); 10391556Srgrimes cmdputs("..."); 10401556Srgrimes break; 10411556Srgrimes case NWHILE: 10421556Srgrimes cmdputs("while "); 10431556Srgrimes goto until; 10441556Srgrimes case NUNTIL: 10451556Srgrimes cmdputs("until "); 10461556Srgrimesuntil: 10471556Srgrimes cmdtxt(n->nbinary.ch1); 10481556Srgrimes cmdputs("; do "); 10491556Srgrimes cmdtxt(n->nbinary.ch2); 10501556Srgrimes cmdputs("; done"); 10511556Srgrimes break; 10521556Srgrimes case NFOR: 10531556Srgrimes cmdputs("for "); 10541556Srgrimes cmdputs(n->nfor.var); 10551556Srgrimes cmdputs(" in ..."); 10561556Srgrimes break; 10571556Srgrimes case NCASE: 10581556Srgrimes cmdputs("case "); 10591556Srgrimes cmdputs(n->ncase.expr->narg.text); 10601556Srgrimes cmdputs(" in ..."); 10611556Srgrimes break; 10621556Srgrimes case NDEFUN: 10631556Srgrimes cmdputs(n->narg.text); 10641556Srgrimes cmdputs("() ..."); 10651556Srgrimes break; 10661556Srgrimes case NCMD: 10671556Srgrimes for (np = n->ncmd.args ; np ; np = np->narg.next) { 10681556Srgrimes cmdtxt(np); 10691556Srgrimes if (np->narg.next) 10701556Srgrimes cmdputs(" "); 10711556Srgrimes } 10721556Srgrimes for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { 10731556Srgrimes cmdputs(" "); 10741556Srgrimes cmdtxt(np); 10751556Srgrimes } 10761556Srgrimes break; 10771556Srgrimes case NARG: 10781556Srgrimes cmdputs(n->narg.text); 10791556Srgrimes break; 10801556Srgrimes case NTO: 10811556Srgrimes p = ">"; i = 1; goto redir; 10821556Srgrimes case NAPPEND: 10831556Srgrimes p = ">>"; i = 1; goto redir; 10841556Srgrimes case NTOFD: 10851556Srgrimes p = ">&"; i = 1; goto redir; 10861556Srgrimes case NFROM: 10871556Srgrimes p = "<"; i = 0; goto redir; 108866612Sbrian case NFROMTO: 108966612Sbrian p = "<>"; i = 0; goto redir; 10901556Srgrimes case NFROMFD: 10911556Srgrimes p = "<&"; i = 0; goto redir; 10921556Srgrimesredir: 10931556Srgrimes if (n->nfile.fd != i) { 10941556Srgrimes s[0] = n->nfile.fd + '0'; 10951556Srgrimes s[1] = '\0'; 10961556Srgrimes cmdputs(s); 10971556Srgrimes } 10981556Srgrimes cmdputs(p); 10991556Srgrimes if (n->type == NTOFD || n->type == NFROMFD) { 11001556Srgrimes s[0] = n->ndup.dupfd + '0'; 11011556Srgrimes s[1] = '\0'; 11021556Srgrimes cmdputs(s); 11031556Srgrimes } else { 11041556Srgrimes cmdtxt(n->nfile.fname); 11051556Srgrimes } 11061556Srgrimes break; 11071556Srgrimes case NHERE: 11081556Srgrimes case NXHERE: 11091556Srgrimes cmdputs("<<..."); 11101556Srgrimes break; 11111556Srgrimes default: 11121556Srgrimes cmdputs("???"); 11131556Srgrimes break; 11141556Srgrimes } 11151556Srgrimes} 11161556Srgrimes 11171556Srgrimes 11181556Srgrimes 11191556SrgrimesSTATIC void 11201556Srgrimescmdputs(s) 11211556Srgrimes char *s; 11221556Srgrimes { 112325222Ssteve char *p, *q; 112425222Ssteve char c; 11251556Srgrimes int subtype = 0; 11261556Srgrimes 11271556Srgrimes if (cmdnleft <= 0) 11281556Srgrimes return; 11291556Srgrimes p = s; 11301556Srgrimes q = cmdnextc; 11311556Srgrimes while ((c = *p++) != '\0') { 11321556Srgrimes if (c == CTLESC) 11331556Srgrimes *q++ = *p++; 11341556Srgrimes else if (c == CTLVAR) { 11351556Srgrimes *q++ = '$'; 11361556Srgrimes if (--cmdnleft > 0) 11371556Srgrimes *q++ = '{'; 11381556Srgrimes subtype = *p++; 11391556Srgrimes } else if (c == '=' && subtype != 0) { 11401556Srgrimes *q++ = "}-+?="[(subtype & VSTYPE) - VSNORMAL]; 11411556Srgrimes subtype = 0; 11421556Srgrimes } else if (c == CTLENDVAR) { 11431556Srgrimes *q++ = '}'; 114418954Ssteve } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) 11451556Srgrimes cmdnleft++; /* ignore it */ 11461556Srgrimes else 11471556Srgrimes *q++ = c; 11481556Srgrimes if (--cmdnleft <= 0) { 11491556Srgrimes *q++ = '.'; 11501556Srgrimes *q++ = '.'; 11511556Srgrimes *q++ = '.'; 11521556Srgrimes break; 11531556Srgrimes } 11541556Srgrimes } 11551556Srgrimes cmdnextc = q; 11561556Srgrimes} 1157