jobs.c revision 96933
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 96933 2002-05-19 07:27:26Z tjr $"; 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> 5569793Sobrien#include <paths.h> 5617987Speter#endif 5718018Speter#include <sys/ioctl.h> 5817987Speter 591556Srgrimes#include "shell.h" 601556Srgrimes#if JOBS 6125222Ssteve#if OLD_TTY_DRIVER 621556Srgrimes#include "sgtty.h" 6317987Speter#else 6417987Speter#include <termios.h> 6517987Speter#endif 661556Srgrimes#undef CEOF /* syntax.h redefines this */ 671556Srgrimes#endif 6817987Speter#include "redir.h" 6917987Speter#include "show.h" 701556Srgrimes#include "main.h" 711556Srgrimes#include "parser.h" 721556Srgrimes#include "nodes.h" 731556Srgrimes#include "jobs.h" 741556Srgrimes#include "options.h" 751556Srgrimes#include "trap.h" 761556Srgrimes#include "syntax.h" 771556Srgrimes#include "input.h" 781556Srgrimes#include "output.h" 791556Srgrimes#include "memalloc.h" 801556Srgrimes#include "error.h" 811556Srgrimes#include "mystring.h" 821556Srgrimes 831556Srgrimes 841556Srgrimesstruct job *jobtab; /* array of jobs */ 851556Srgrimesint njobs; /* size of array */ 8628346SsteveMKINIT pid_t backgndpid = -1; /* pid of last background process */ 871556Srgrimes#if JOBS 881556Srgrimesint initialpgrp; /* pgrp of shell on invocation */ 8928346Ssteveint curjob; /* current job */ 901556Srgrimes#endif 9138536Scracauerint in_waitcmd = 0; /* are we in waitcmd()? */ 9238950Scracauerint in_dowait = 0; /* are we in dowait()? */ 9338536Scracauervolatile sig_atomic_t breakwaitcmd = 0; /* should wait be terminated? */ 941556Srgrimes 9520425Ssteve#if JOBS 9690111SimpSTATIC void restartjob(struct job *); 9720425Ssteve#endif 9890111SimpSTATIC void freejob(struct job *); 9990111SimpSTATIC struct job *getjob(char *); 10090111SimpSTATIC int dowait(int, struct job *); 10120425Ssteve#if SYSV 10290111SimpSTATIC int onsigchild(void); 10320425Ssteve#endif 10490111SimpSTATIC int waitproc(int, int *); 10590111SimpSTATIC void cmdtxt(union node *); 10690111SimpSTATIC void cmdputs(char *); 1071556Srgrimes 1081556Srgrimes 1091556Srgrimes/* 1101556Srgrimes * Turn job control on and off. 1111556Srgrimes * 1121556Srgrimes * Note: This code assumes that the third arg to ioctl is a character 1131556Srgrimes * pointer, which is true on Berkeley systems but not System V. Since 1141556Srgrimes * System V doesn't have job control yet, this isn't a problem now. 1151556Srgrimes */ 1161556Srgrimes 1171556SrgrimesMKINIT int jobctl; 1181556Srgrimes 11920425Ssteve#if JOBS 1201556Srgrimesvoid 12190111Simpsetjobctl(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 19790111Simpfgcmd(int argc __unused, char **argv) 19817987Speter{ 1991556Srgrimes struct job *jp; 2001556Srgrimes int pgrp; 2011556Srgrimes int status; 2021556Srgrimes 2031556Srgrimes jp = getjob(argv[1]); 2041556Srgrimes if (jp->jobctl == 0) 2051556Srgrimes error("job not created under job control"); 20696933Stjr out1str(jp->ps[0].cmd); 20796933Stjr out1c('\n'); 20896933Stjr flushout(&output); 2091556Srgrimes pgrp = jp->ps[0].pid; 21020425Ssteve#ifdef OLD_TTY_DRIVER 2111556Srgrimes ioctl(2, TIOCSPGRP, (char *)&pgrp); 21220425Ssteve#else 21320425Ssteve tcsetpgrp(2, pgrp); 21420425Ssteve#endif 2151556Srgrimes restartjob(jp); 2161556Srgrimes INTOFF; 21745916Scracauer status = waitforjob(jp, (int *)NULL); 2181556Srgrimes INTON; 2191556Srgrimes return status; 2201556Srgrimes} 2211556Srgrimes 2221556Srgrimes 22317987Speterint 22490111Simpbgcmd(int argc, char **argv) 22517987Speter{ 22696933Stjr char s[64]; 2271556Srgrimes struct job *jp; 2281556Srgrimes 2291556Srgrimes do { 2301556Srgrimes jp = getjob(*++argv); 2311556Srgrimes if (jp->jobctl == 0) 2321556Srgrimes error("job not created under job control"); 23396933Stjr if (jp->state == JOBDONE) 23496933Stjr continue; 2351556Srgrimes restartjob(jp); 23696933Stjr fmtstr(s, 64, "[%d] ", jp - jobtab + 1); 23796933Stjr out1str(s); 23896933Stjr out1str(jp->ps[0].cmd); 23996933Stjr out1c('\n'); 2401556Srgrimes } while (--argc > 1); 2411556Srgrimes return 0; 2421556Srgrimes} 2431556Srgrimes 2441556Srgrimes 2451556SrgrimesSTATIC void 24690111Simprestartjob(struct job *jp) 24717987Speter{ 2481556Srgrimes struct procstat *ps; 2491556Srgrimes int i; 2501556Srgrimes 2511556Srgrimes if (jp->state == JOBDONE) 2521556Srgrimes return; 2531556Srgrimes INTOFF; 2541556Srgrimes killpg(jp->ps[0].pid, SIGCONT); 2551556Srgrimes for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 25626104Ssteve if (WIFSTOPPED(ps->status)) { 2571556Srgrimes ps->status = -1; 2581556Srgrimes jp->state = 0; 2591556Srgrimes } 2601556Srgrimes } 2611556Srgrimes INTON; 2621556Srgrimes} 2631556Srgrimes#endif 2641556Srgrimes 2651556Srgrimes 2661556Srgrimesint 26790111Simpjobscmd(int argc __unused, char **argv __unused) 26817987Speter{ 2691556Srgrimes showjobs(0); 2701556Srgrimes return 0; 2711556Srgrimes} 2721556Srgrimes 2731556Srgrimes 2741556Srgrimes/* 2751556Srgrimes * Print a list of jobs. If "change" is nonzero, only print jobs whose 2761556Srgrimes * statuses have changed since the last call to showjobs. 2771556Srgrimes * 2781556Srgrimes * If the shell is interrupted in the process of creating a job, the 2791556Srgrimes * result may be a job structure containing zero processes. Such structures 2801556Srgrimes * will be freed here. 2811556Srgrimes */ 2821556Srgrimes 2831556Srgrimesvoid 28490111Simpshowjobs(int change) 28517987Speter{ 2861556Srgrimes int jobno; 2871556Srgrimes int procno; 2881556Srgrimes int i; 2891556Srgrimes struct job *jp; 2901556Srgrimes struct procstat *ps; 2911556Srgrimes int col; 2921556Srgrimes char s[64]; 2931556Srgrimes 2941556Srgrimes TRACE(("showjobs(%d) called\n", change)); 2951556Srgrimes while (dowait(0, (struct job *)NULL) > 0); 2961556Srgrimes for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) { 2971556Srgrimes if (! jp->used) 2981556Srgrimes continue; 2991556Srgrimes if (jp->nprocs == 0) { 3001556Srgrimes freejob(jp); 3011556Srgrimes continue; 3021556Srgrimes } 3031556Srgrimes if (change && ! jp->changed) 3041556Srgrimes continue; 3051556Srgrimes procno = jp->nprocs; 3061556Srgrimes for (ps = jp->ps ; ; ps++) { /* for each process */ 3071556Srgrimes if (ps == jp->ps) 3081556Srgrimes fmtstr(s, 64, "[%d] %d ", jobno, ps->pid); 3091556Srgrimes else 3101556Srgrimes fmtstr(s, 64, " %d ", ps->pid); 3111556Srgrimes out1str(s); 3121556Srgrimes col = strlen(s); 3131556Srgrimes s[0] = '\0'; 3141556Srgrimes if (ps->status == -1) { 3151556Srgrimes /* don't print anything */ 31626104Ssteve } else if (WIFEXITED(ps->status)) { 31726104Ssteve fmtstr(s, 64, "Exit %d", WEXITSTATUS(ps->status)); 3181556Srgrimes } else { 3191556Srgrimes#if JOBS 32026104Ssteve if (WIFSTOPPED(ps->status)) 32126104Ssteve i = WSTOPSIG(ps->status); 32226104Ssteve else 3231556Srgrimes#endif 32426104Ssteve i = WTERMSIG(ps->status); 32517987Speter if ((i & 0x7F) < NSIG && sys_siglist[i & 0x7F]) 32617987Speter scopy(sys_siglist[i & 0x7F], s); 3271556Srgrimes else 3281556Srgrimes fmtstr(s, 64, "Signal %d", i & 0x7F); 32926104Ssteve if (WCOREDUMP(ps->status)) 3301556Srgrimes strcat(s, " (core dumped)"); 3311556Srgrimes } 3321556Srgrimes out1str(s); 3331556Srgrimes col += strlen(s); 3341556Srgrimes do { 3351556Srgrimes out1c(' '); 3361556Srgrimes col++; 3371556Srgrimes } while (col < 30); 3381556Srgrimes out1str(ps->cmd); 3391556Srgrimes out1c('\n'); 3401556Srgrimes if (--procno <= 0) 3411556Srgrimes break; 3421556Srgrimes } 3431556Srgrimes jp->changed = 0; 3441556Srgrimes if (jp->state == JOBDONE) { 3451556Srgrimes freejob(jp); 3461556Srgrimes } 3471556Srgrimes } 3481556Srgrimes} 3491556Srgrimes 3501556Srgrimes 3511556Srgrimes/* 3521556Srgrimes * Mark a job structure as unused. 3531556Srgrimes */ 3541556Srgrimes 3551556SrgrimesSTATIC void 35690111Simpfreejob(struct job *jp) 35790111Simp{ 3581556Srgrimes struct procstat *ps; 3591556Srgrimes int i; 3601556Srgrimes 3611556Srgrimes INTOFF; 3621556Srgrimes for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { 3631556Srgrimes if (ps->cmd != nullstr) 3641556Srgrimes ckfree(ps->cmd); 3651556Srgrimes } 3661556Srgrimes if (jp->ps != &jp->ps0) 3671556Srgrimes ckfree(jp->ps); 3681556Srgrimes jp->used = 0; 3691556Srgrimes#if JOBS 3701556Srgrimes if (curjob == jp - jobtab + 1) 3711556Srgrimes curjob = 0; 3721556Srgrimes#endif 3731556Srgrimes INTON; 3741556Srgrimes} 3751556Srgrimes 3761556Srgrimes 3771556Srgrimes 3781556Srgrimesint 37990111Simpwaitcmd(int argc, char **argv) 38017987Speter{ 3811556Srgrimes struct job *job; 38226104Ssteve int status, retval; 3831556Srgrimes struct job *jp; 3841556Srgrimes 3851556Srgrimes if (argc > 1) { 3861556Srgrimes job = getjob(argv[1]); 3871556Srgrimes } else { 3881556Srgrimes job = NULL; 3891556Srgrimes } 39038536Scracauer 39138536Scracauer /* 39238536Scracauer * Loop until a process is terminated or stopped, or a SIGINT is 39338536Scracauer * received. 39438536Scracauer */ 39538536Scracauer 39638521Scracauer in_waitcmd++; 39738536Scracauer do { 3981556Srgrimes if (job != NULL) { 3991556Srgrimes if (job->state) { 4001556Srgrimes status = job->ps[job->nprocs - 1].status; 40126104Ssteve if (WIFEXITED(status)) 40226104Ssteve retval = WEXITSTATUS(status); 4031556Srgrimes#if JOBS 40426104Ssteve else if (WIFSTOPPED(status)) 40526104Ssteve retval = WSTOPSIG(status) + 128; 4061556Srgrimes#endif 4071556Srgrimes else 40826104Ssteve retval = WTERMSIG(status) + 128; 4091556Srgrimes if (! iflag) 4101556Srgrimes freejob(job); 41138536Scracauer in_waitcmd--; 41226104Ssteve return retval; 4131556Srgrimes } 4141556Srgrimes } else { 4151556Srgrimes for (jp = jobtab ; ; jp++) { 4161556Srgrimes if (jp >= jobtab + njobs) { /* no running procs */ 41738536Scracauer in_waitcmd--; 4181556Srgrimes return 0; 4191556Srgrimes } 4201556Srgrimes if (jp->used && jp->state == 0) 4211556Srgrimes break; 4221556Srgrimes } 4231556Srgrimes } 42438521Scracauer } while (dowait(1, (struct job *)NULL) != -1); 42538521Scracauer in_waitcmd--; 42638521Scracauer 42738521Scracauer return 0; 4281556Srgrimes} 4291556Srgrimes 4301556Srgrimes 4311556Srgrimes 43217987Speterint 43390111Simpjobidcmd(int argc __unused, char **argv) 43417987Speter{ 4351556Srgrimes struct job *jp; 4361556Srgrimes int i; 4371556Srgrimes 4381556Srgrimes jp = getjob(argv[1]); 4391556Srgrimes for (i = 0 ; i < jp->nprocs ; ) { 4401556Srgrimes out1fmt("%d", jp->ps[i].pid); 4411556Srgrimes out1c(++i < jp->nprocs? ' ' : '\n'); 4421556Srgrimes } 4431556Srgrimes return 0; 4441556Srgrimes} 4451556Srgrimes 4461556Srgrimes 4471556Srgrimes 4481556Srgrimes/* 4491556Srgrimes * Convert a job name to a job structure. 4501556Srgrimes */ 4511556Srgrimes 4521556SrgrimesSTATIC struct job * 45390111Simpgetjob(char *name) 45490111Simp{ 4551556Srgrimes int jobno; 45625222Ssteve struct job *jp; 4571556Srgrimes int pid; 4581556Srgrimes int i; 4591556Srgrimes 4601556Srgrimes if (name == NULL) { 4611556Srgrimes#if JOBS 4621556Srgrimescurrentjob: 4631556Srgrimes if ((jobno = curjob) == 0 || jobtab[jobno - 1].used == 0) 4641556Srgrimes error("No current job"); 4651556Srgrimes return &jobtab[jobno - 1]; 4661556Srgrimes#else 4671556Srgrimes error("No current job"); 4681556Srgrimes#endif 4691556Srgrimes } else if (name[0] == '%') { 4701556Srgrimes if (is_digit(name[1])) { 4711556Srgrimes jobno = number(name + 1); 4721556Srgrimes if (jobno > 0 && jobno <= njobs 4731556Srgrimes && jobtab[jobno - 1].used != 0) 4741556Srgrimes return &jobtab[jobno - 1]; 4751556Srgrimes#if JOBS 4761556Srgrimes } else if (name[1] == '%' && name[2] == '\0') { 4771556Srgrimes goto currentjob; 4781556Srgrimes#endif 4791556Srgrimes } else { 48025222Ssteve struct job *found = NULL; 4811556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 4821556Srgrimes if (jp->used && jp->nprocs > 0 4831556Srgrimes && prefix(name + 1, jp->ps[0].cmd)) { 4841556Srgrimes if (found) 4851556Srgrimes error("%s: ambiguous", name); 4861556Srgrimes found = jp; 4871556Srgrimes } 4881556Srgrimes } 4891556Srgrimes if (found) 4901556Srgrimes return found; 4911556Srgrimes } 4921556Srgrimes } else if (is_number(name)) { 4931556Srgrimes pid = number(name); 4941556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 4951556Srgrimes if (jp->used && jp->nprocs > 0 4961556Srgrimes && jp->ps[jp->nprocs - 1].pid == pid) 4971556Srgrimes return jp; 4981556Srgrimes } 4991556Srgrimes } 5001556Srgrimes error("No such job: %s", name); 50117987Speter /*NOTREACHED*/ 50217987Speter return NULL; 5031556Srgrimes} 5041556Srgrimes 5051556Srgrimes 5061556Srgrimes 5071556Srgrimes/* 5081556Srgrimes * Return a new job structure, 5091556Srgrimes */ 5101556Srgrimes 5111556Srgrimesstruct job * 51290111Simpmakejob(union node *node __unused, int nprocs) 51317987Speter{ 5141556Srgrimes int i; 5151556Srgrimes struct job *jp; 5161556Srgrimes 5171556Srgrimes for (i = njobs, jp = jobtab ; ; jp++) { 5181556Srgrimes if (--i < 0) { 5191556Srgrimes INTOFF; 5201556Srgrimes if (njobs == 0) { 5211556Srgrimes jobtab = ckmalloc(4 * sizeof jobtab[0]); 5221556Srgrimes } else { 5231556Srgrimes jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); 52417987Speter memcpy(jp, jobtab, njobs * sizeof jp[0]); 52520425Ssteve /* Relocate `ps' pointers */ 52620425Ssteve for (i = 0; i < njobs; i++) 52720425Ssteve if (jp[i].ps == &jobtab[i].ps0) 52820425Ssteve jp[i].ps = &jp[i].ps0; 5291556Srgrimes ckfree(jobtab); 5301556Srgrimes jobtab = jp; 5311556Srgrimes } 5321556Srgrimes jp = jobtab + njobs; 5331556Srgrimes for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0); 5341556Srgrimes INTON; 5351556Srgrimes break; 5361556Srgrimes } 5371556Srgrimes if (jp->used == 0) 5381556Srgrimes break; 5391556Srgrimes } 5401556Srgrimes INTOFF; 5411556Srgrimes jp->state = 0; 5421556Srgrimes jp->used = 1; 5431556Srgrimes jp->changed = 0; 5441556Srgrimes jp->nprocs = 0; 5451556Srgrimes#if JOBS 5461556Srgrimes jp->jobctl = jobctl; 5471556Srgrimes#endif 5481556Srgrimes if (nprocs > 1) { 5491556Srgrimes jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); 5501556Srgrimes } else { 5511556Srgrimes jp->ps = &jp->ps0; 5521556Srgrimes } 5531556Srgrimes INTON; 55417987Speter TRACE(("makejob(0x%lx, %d) returns %%%d\n", (long)node, nprocs, 55517987Speter jp - jobtab + 1)); 5561556Srgrimes return jp; 5578855Srgrimes} 5581556Srgrimes 5591556Srgrimes 5601556Srgrimes/* 5611556Srgrimes * Fork of a subshell. If we are doing job control, give the subshell its 5621556Srgrimes * own process group. Jp is a job structure that the job is to be added to. 5631556Srgrimes * N is the command that will be evaluated by the child. Both jp and n may 5641556Srgrimes * be NULL. The mode parameter can be one of the following: 5651556Srgrimes * FORK_FG - Fork off a foreground process. 5661556Srgrimes * FORK_BG - Fork off a background process. 5671556Srgrimes * FORK_NOJOB - Like FORK_FG, but don't give the process its own 5681556Srgrimes * process group even if job control is on. 5691556Srgrimes * 5701556Srgrimes * When job control is turned off, background processes have their standard 5711556Srgrimes * input redirected to /dev/null (except for the second and later processes 5721556Srgrimes * in a pipeline). 5731556Srgrimes */ 5741556Srgrimes 5751556Srgrimesint 57690111Simpforkshell(struct job *jp, union node *n, int mode) 57717987Speter{ 5781556Srgrimes int pid; 5791556Srgrimes int pgrp; 5801556Srgrimes 58117987Speter TRACE(("forkshell(%%%d, 0x%lx, %d) called\n", jp - jobtab, (long)n, 58217987Speter mode)); 5831556Srgrimes INTOFF; 5841556Srgrimes pid = fork(); 5851556Srgrimes if (pid == -1) { 5861556Srgrimes TRACE(("Fork failed, errno=%d\n", errno)); 5871556Srgrimes INTON; 58853891Scracauer error("Cannot fork: %s", strerror(errno)); 5891556Srgrimes } 5901556Srgrimes if (pid == 0) { 5911556Srgrimes struct job *p; 5921556Srgrimes int wasroot; 5931556Srgrimes int i; 5941556Srgrimes 5951556Srgrimes TRACE(("Child shell %d\n", getpid())); 5961556Srgrimes wasroot = rootshell; 5971556Srgrimes rootshell = 0; 5981556Srgrimes for (i = njobs, p = jobtab ; --i >= 0 ; p++) 5991556Srgrimes if (p->used) 6001556Srgrimes freejob(p); 6011556Srgrimes closescript(); 6021556Srgrimes INTON; 6031556Srgrimes clear_traps(); 6041556Srgrimes#if JOBS 6051556Srgrimes jobctl = 0; /* do job control only in root shell */ 6061556Srgrimes if (wasroot && mode != FORK_NOJOB && mflag) { 6071556Srgrimes if (jp == NULL || jp->nprocs == 0) 6081556Srgrimes pgrp = getpid(); 6091556Srgrimes else 6101556Srgrimes pgrp = jp->ps[0].pid; 61121352Ssteve if (setpgid(0, pgrp) == 0 && mode == FORK_FG) { 6121556Srgrimes /*** this causes superfluous TIOCSPGRPS ***/ 61320425Ssteve#ifdef OLD_TTY_DRIVER 6141556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&pgrp) < 0) 61518016Speter error("TIOCSPGRP failed, errno=%d", errno); 61620425Ssteve#else 61720425Ssteve if (tcsetpgrp(2, pgrp) < 0) 61820425Ssteve error("tcsetpgrp failed, errno=%d", errno); 61920425Ssteve#endif 6201556Srgrimes } 6211556Srgrimes setsignal(SIGTSTP); 6221556Srgrimes setsignal(SIGTTOU); 6231556Srgrimes } else if (mode == FORK_BG) { 6241556Srgrimes ignoresig(SIGINT); 6251556Srgrimes ignoresig(SIGQUIT); 6261556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 6271556Srgrimes ! fd0_redirected_p ()) { 6281556Srgrimes close(0); 62969793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 63069793Sobrien error("Can't open %s: %s", 63169793Sobrien _PATH_DEVNULL, strerror(errno)); 6321556Srgrimes } 6331556Srgrimes } 6341556Srgrimes#else 6351556Srgrimes if (mode == FORK_BG) { 6361556Srgrimes ignoresig(SIGINT); 6371556Srgrimes ignoresig(SIGQUIT); 6381556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 6391556Srgrimes ! fd0_redirected_p ()) { 6401556Srgrimes close(0); 64169793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 64269793Sobrien error("Can't open %s: %s", 64369793Sobrien _PATH_DEVNULL, strerror(errno)); 6441556Srgrimes } 6451556Srgrimes } 6461556Srgrimes#endif 6471556Srgrimes if (wasroot && iflag) { 6481556Srgrimes setsignal(SIGINT); 6491556Srgrimes setsignal(SIGQUIT); 6501556Srgrimes setsignal(SIGTERM); 6511556Srgrimes } 6521556Srgrimes return pid; 6531556Srgrimes } 6541556Srgrimes if (rootshell && mode != FORK_NOJOB && mflag) { 6551556Srgrimes if (jp == NULL || jp->nprocs == 0) 6561556Srgrimes pgrp = pid; 6571556Srgrimes else 6581556Srgrimes pgrp = jp->ps[0].pid; 65917987Speter setpgid(pid, pgrp); 6601556Srgrimes } 6611556Srgrimes if (mode == FORK_BG) 6621556Srgrimes backgndpid = pid; /* set $! */ 6631556Srgrimes if (jp) { 6641556Srgrimes struct procstat *ps = &jp->ps[jp->nprocs++]; 6651556Srgrimes ps->pid = pid; 6661556Srgrimes ps->status = -1; 6671556Srgrimes ps->cmd = nullstr; 6681556Srgrimes if (iflag && rootshell && n) 6691556Srgrimes ps->cmd = commandtext(n); 6701556Srgrimes } 6711556Srgrimes INTON; 6721556Srgrimes TRACE(("In parent shell: child = %d\n", pid)); 6731556Srgrimes return pid; 6741556Srgrimes} 6751556Srgrimes 6761556Srgrimes 6771556Srgrimes 6781556Srgrimes/* 6791556Srgrimes * Wait for job to finish. 6801556Srgrimes * 6811556Srgrimes * Under job control we have the problem that while a child process is 6821556Srgrimes * running interrupts generated by the user are sent to the child but not 6831556Srgrimes * to the shell. This means that an infinite loop started by an inter- 6841556Srgrimes * active user may be hard to kill. With job control turned off, an 6851556Srgrimes * interactive user may place an interactive program inside a loop. If 6861556Srgrimes * the interactive program catches interrupts, the user doesn't want 6871556Srgrimes * these interrupts to also abort the loop. The approach we take here 6881556Srgrimes * is to have the shell ignore interrupt signals while waiting for a 68946684Skris * foreground process to terminate, and then send itself an interrupt 6901556Srgrimes * signal if the child process was terminated by an interrupt signal. 6911556Srgrimes * Unfortunately, some programs want to do a bit of cleanup and then 6921556Srgrimes * exit on interrupt; unless these processes terminate themselves by 6931556Srgrimes * sending a signal to themselves (instead of calling exit) they will 6941556Srgrimes * confuse this approach. 6951556Srgrimes */ 6961556Srgrimes 6971556Srgrimesint 69890111Simpwaitforjob(struct job *jp, int *origstatus) 69945916Scracauer{ 7001556Srgrimes#if JOBS 70117987Speter int mypgrp = getpgrp(); 7021556Srgrimes#endif 7031556Srgrimes int status; 7041556Srgrimes int st; 7051556Srgrimes 7061556Srgrimes INTOFF; 7071556Srgrimes TRACE(("waitforjob(%%%d) called\n", jp - jobtab + 1)); 70838950Scracauer while (jp->state == 0) 70938950Scracauer if (dowait(1, jp) == -1) 71038950Scracauer dotrap(); 7111556Srgrimes#if JOBS 7121556Srgrimes if (jp->jobctl) { 71320425Ssteve#ifdef OLD_TTY_DRIVER 7141556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&mypgrp) < 0) 71520425Ssteve error("TIOCSPGRP failed, errno=%d\n", errno); 71620425Ssteve#else 71720425Ssteve if (tcsetpgrp(2, mypgrp) < 0) 71820425Ssteve error("tcsetpgrp failed, errno=%d\n", errno); 71920425Ssteve#endif 7201556Srgrimes } 7211556Srgrimes if (jp->state == JOBSTOPPED) 7221556Srgrimes curjob = jp - jobtab + 1; 7231556Srgrimes#endif 7241556Srgrimes status = jp->ps[jp->nprocs - 1].status; 72545916Scracauer if (origstatus != NULL) 72645916Scracauer *origstatus = status; 7271556Srgrimes /* convert to 8 bits */ 72826104Ssteve if (WIFEXITED(status)) 72926104Ssteve st = WEXITSTATUS(status); 7301556Srgrimes#if JOBS 73126104Ssteve else if (WIFSTOPPED(status)) 73226104Ssteve st = WSTOPSIG(status) + 128; 7331556Srgrimes#endif 7341556Srgrimes else 73526104Ssteve st = WTERMSIG(status) + 128; 7361556Srgrimes if (! JOBS || jp->state == JOBDONE) 7371556Srgrimes freejob(jp); 73838521Scracauer if (int_pending()) { 73938521Scracauer if (WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) 74038521Scracauer kill(getpid(), SIGINT); 74138521Scracauer else 74238521Scracauer CLEAR_PENDING_INT; 74338521Scracauer } 7441556Srgrimes INTON; 7451556Srgrimes return st; 7461556Srgrimes} 7471556Srgrimes 7481556Srgrimes 7491556Srgrimes 7501556Srgrimes/* 7511556Srgrimes * Wait for a process to terminate. 7521556Srgrimes */ 7531556Srgrimes 7541556SrgrimesSTATIC int 75590111Simpdowait(int block, struct job *job) 75617987Speter{ 7571556Srgrimes int pid; 7581556Srgrimes int status; 7591556Srgrimes struct procstat *sp; 7601556Srgrimes struct job *jp; 7611556Srgrimes struct job *thisjob; 7621556Srgrimes int done; 7631556Srgrimes int stopped; 7641556Srgrimes int core; 76526104Ssteve int sig; 7661556Srgrimes 76738950Scracauer in_dowait++; 7681556Srgrimes TRACE(("dowait(%d) called\n", block)); 7691556Srgrimes do { 7701556Srgrimes pid = waitproc(block, &status); 7711556Srgrimes TRACE(("wait returns %d, status=%d\n", pid, status)); 77272086Scracauer } while ((pid == -1 && errno == EINTR && breakwaitcmd == 0) || 77372086Scracauer (WIFSTOPPED(status) && !iflag)); 77438950Scracauer in_dowait--; 77538521Scracauer if (breakwaitcmd != 0) { 77638521Scracauer breakwaitcmd = 0; 77738521Scracauer return -1; 77838521Scracauer } 7791556Srgrimes if (pid <= 0) 7801556Srgrimes return pid; 7811556Srgrimes INTOFF; 7821556Srgrimes thisjob = NULL; 7831556Srgrimes for (jp = jobtab ; jp < jobtab + njobs ; jp++) { 7841556Srgrimes if (jp->used) { 7851556Srgrimes done = 1; 7861556Srgrimes stopped = 1; 7871556Srgrimes for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { 7881556Srgrimes if (sp->pid == -1) 7891556Srgrimes continue; 7901556Srgrimes if (sp->pid == pid) { 79126104Ssteve TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", 79226104Ssteve pid, sp->status, status)); 7931556Srgrimes sp->status = status; 7941556Srgrimes thisjob = jp; 7951556Srgrimes } 7961556Srgrimes if (sp->status == -1) 7971556Srgrimes stopped = 0; 79826104Ssteve else if (WIFSTOPPED(sp->status)) 7991556Srgrimes done = 0; 8001556Srgrimes } 8011556Srgrimes if (stopped) { /* stopped or done */ 8021556Srgrimes int state = done? JOBDONE : JOBSTOPPED; 8031556Srgrimes if (jp->state != state) { 8041556Srgrimes TRACE(("Job %d: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); 8051556Srgrimes jp->state = state; 8061556Srgrimes#if JOBS 8071556Srgrimes if (done && curjob == jp - jobtab + 1) 8081556Srgrimes curjob = 0; /* no current job */ 8091556Srgrimes#endif 8101556Srgrimes } 8111556Srgrimes } 8121556Srgrimes } 8131556Srgrimes } 8141556Srgrimes INTON; 8151556Srgrimes if (! rootshell || ! iflag || (job && thisjob == job)) { 81626104Ssteve core = WCOREDUMP(status); 8171556Srgrimes#if JOBS 81826104Ssteve if (WIFSTOPPED(status)) 81926104Ssteve sig = WSTOPSIG(status); 82026104Ssteve else 8211556Srgrimes#endif 82226104Ssteve if (WIFEXITED(status)) 82326104Ssteve sig = 0; 82426104Ssteve else 82526104Ssteve sig = WTERMSIG(status); 82626104Ssteve 82726104Ssteve if (sig != 0 && sig != SIGINT && sig != SIGPIPE) { 8281556Srgrimes if (thisjob != job) 8291556Srgrimes outfmt(out2, "%d: ", pid); 8301556Srgrimes#if JOBS 83126104Ssteve if (sig == SIGTSTP && rootshell && iflag) 8321556Srgrimes outfmt(out2, "%%%d ", job - jobtab + 1); 8331556Srgrimes#endif 83426104Ssteve if (sig < NSIG && sys_siglist[sig]) 83526104Ssteve out2str(sys_siglist[sig]); 8361556Srgrimes else 83726104Ssteve outfmt(out2, "Signal %d", sig); 8381556Srgrimes if (core) 8391556Srgrimes out2str(" - core dumped"); 8401556Srgrimes out2c('\n'); 8411556Srgrimes flushout(&errout); 8421556Srgrimes } else { 84326104Ssteve TRACE(("Not printing status: status=%d, sig=%d\n", 84426104Ssteve status, sig)); 8451556Srgrimes } 8461556Srgrimes } else { 8471556Srgrimes TRACE(("Not printing status, rootshell=%d, job=0x%x\n", rootshell, job)); 8481556Srgrimes if (thisjob) 8491556Srgrimes thisjob->changed = 1; 8501556Srgrimes } 8511556Srgrimes return pid; 8521556Srgrimes} 8531556Srgrimes 8541556Srgrimes 8551556Srgrimes 8561556Srgrimes/* 8571556Srgrimes * Do a wait system call. If job control is compiled in, we accept 8581556Srgrimes * stopped processes. If block is zero, we return a value of zero 8591556Srgrimes * rather than blocking. 8601556Srgrimes * 8611556Srgrimes * System V doesn't have a non-blocking wait system call. It does 8621556Srgrimes * have a SIGCLD signal that is sent to a process when one of it's 8631556Srgrimes * children dies. The obvious way to use SIGCLD would be to install 8641556Srgrimes * a handler for SIGCLD which simply bumped a counter when a SIGCLD 8651556Srgrimes * was received, and have waitproc bump another counter when it got 8661556Srgrimes * the status of a process. Waitproc would then know that a wait 8671556Srgrimes * system call would not block if the two counters were different. 8681556Srgrimes * This approach doesn't work because if a process has children that 8691556Srgrimes * have not been waited for, System V will send it a SIGCLD when it 8701556Srgrimes * installs a signal handler for SIGCLD. What this means is that when 8711556Srgrimes * a child exits, the shell will be sent SIGCLD signals continuously 8721556Srgrimes * until is runs out of stack space, unless it does a wait call before 8731556Srgrimes * restoring the signal handler. The code below takes advantage of 8741556Srgrimes * this (mis)feature by installing a signal handler for SIGCLD and 8751556Srgrimes * then checking to see whether it was called. If there are any 8761556Srgrimes * children to be waited for, it will be. 8771556Srgrimes * 8781556Srgrimes * If neither SYSV nor BSD is defined, we don't implement nonblocking 8791556Srgrimes * waits at all. In this case, the user will not be informed when 8801556Srgrimes * a background process until the next time she runs a real program 8811556Srgrimes * (as opposed to running a builtin command or just typing return), 8821556Srgrimes * and the jobs command may give out of date information. 8831556Srgrimes */ 8841556Srgrimes 8851556Srgrimes#ifdef SYSV 88638521ScracauerSTATIC sig_atomic_t gotsigchild; 8871556Srgrimes 8881556SrgrimesSTATIC int onsigchild() { 8891556Srgrimes gotsigchild = 1; 8901556Srgrimes} 8911556Srgrimes#endif 8921556Srgrimes 8931556Srgrimes 8941556SrgrimesSTATIC int 89590111Simpwaitproc(int block, int *status) 89617987Speter{ 8971556Srgrimes#ifdef BSD 8981556Srgrimes int flags; 8991556Srgrimes 9001556Srgrimes#if JOBS 9011556Srgrimes flags = WUNTRACED; 9021556Srgrimes#else 9031556Srgrimes flags = 0; 9041556Srgrimes#endif 9051556Srgrimes if (block == 0) 9061556Srgrimes flags |= WNOHANG; 9071556Srgrimes return wait3(status, flags, (struct rusage *)NULL); 9081556Srgrimes#else 9091556Srgrimes#ifdef SYSV 9101556Srgrimes int (*save)(); 9111556Srgrimes 9121556Srgrimes if (block == 0) { 9131556Srgrimes gotsigchild = 0; 9141556Srgrimes save = signal(SIGCLD, onsigchild); 9151556Srgrimes signal(SIGCLD, save); 9161556Srgrimes if (gotsigchild == 0) 9171556Srgrimes return 0; 9181556Srgrimes } 9191556Srgrimes return wait(status); 9201556Srgrimes#else 9211556Srgrimes if (block == 0) 9221556Srgrimes return 0; 9231556Srgrimes return wait(status); 9241556Srgrimes#endif 9251556Srgrimes#endif 9261556Srgrimes} 9271556Srgrimes 9281556Srgrimes/* 9291556Srgrimes * return 1 if there are stopped jobs, otherwise 0 9301556Srgrimes */ 9311556Srgrimesint job_warning = 0; 9321556Srgrimesint 93390111Simpstoppedjobs(void) 9341556Srgrimes{ 93525222Ssteve int jobno; 93625222Ssteve struct job *jp; 9371556Srgrimes 9381556Srgrimes if (job_warning) 9391556Srgrimes return (0); 9401556Srgrimes for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { 9411556Srgrimes if (jp->used == 0) 9421556Srgrimes continue; 9431556Srgrimes if (jp->state == JOBSTOPPED) { 9441556Srgrimes out2str("You have stopped jobs.\n"); 9451556Srgrimes job_warning = 2; 9461556Srgrimes return (1); 9471556Srgrimes } 9481556Srgrimes } 9491556Srgrimes 9501556Srgrimes return (0); 9511556Srgrimes} 9521556Srgrimes 9531556Srgrimes/* 9541556Srgrimes * Return a string identifying a command (to be printed by the 9551556Srgrimes * jobs command. 9561556Srgrimes */ 9571556Srgrimes 9581556SrgrimesSTATIC char *cmdnextc; 9591556SrgrimesSTATIC int cmdnleft; 9601556Srgrimes#define MAXCMDTEXT 200 9611556Srgrimes 9621556Srgrimeschar * 96390111Simpcommandtext(union node *n) 96490111Simp{ 9651556Srgrimes char *name; 9661556Srgrimes 9671556Srgrimes cmdnextc = name = ckmalloc(MAXCMDTEXT); 9681556Srgrimes cmdnleft = MAXCMDTEXT - 4; 9691556Srgrimes cmdtxt(n); 9701556Srgrimes *cmdnextc = '\0'; 9711556Srgrimes return name; 9721556Srgrimes} 9731556Srgrimes 9741556Srgrimes 9751556SrgrimesSTATIC void 97690111Simpcmdtxt(union node *n) 97790111Simp{ 9781556Srgrimes union node *np; 9791556Srgrimes struct nodelist *lp; 9801556Srgrimes char *p; 9811556Srgrimes int i; 9821556Srgrimes char s[2]; 9831556Srgrimes 9841556Srgrimes if (n == NULL) 9851556Srgrimes return; 9861556Srgrimes switch (n->type) { 9871556Srgrimes case NSEMI: 9881556Srgrimes cmdtxt(n->nbinary.ch1); 9891556Srgrimes cmdputs("; "); 9901556Srgrimes cmdtxt(n->nbinary.ch2); 9911556Srgrimes break; 9921556Srgrimes case NAND: 9931556Srgrimes cmdtxt(n->nbinary.ch1); 9941556Srgrimes cmdputs(" && "); 9951556Srgrimes cmdtxt(n->nbinary.ch2); 9961556Srgrimes break; 9971556Srgrimes case NOR: 9981556Srgrimes cmdtxt(n->nbinary.ch1); 9991556Srgrimes cmdputs(" || "); 10001556Srgrimes cmdtxt(n->nbinary.ch2); 10011556Srgrimes break; 10021556Srgrimes case NPIPE: 10031556Srgrimes for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 10041556Srgrimes cmdtxt(lp->n); 10051556Srgrimes if (lp->next) 10061556Srgrimes cmdputs(" | "); 10071556Srgrimes } 10081556Srgrimes break; 10091556Srgrimes case NSUBSHELL: 10101556Srgrimes cmdputs("("); 10111556Srgrimes cmdtxt(n->nredir.n); 10121556Srgrimes cmdputs(")"); 10131556Srgrimes break; 10141556Srgrimes case NREDIR: 10151556Srgrimes case NBACKGND: 10161556Srgrimes cmdtxt(n->nredir.n); 10171556Srgrimes break; 10181556Srgrimes case NIF: 10191556Srgrimes cmdputs("if "); 10201556Srgrimes cmdtxt(n->nif.test); 10211556Srgrimes cmdputs("; then "); 10221556Srgrimes cmdtxt(n->nif.ifpart); 10231556Srgrimes cmdputs("..."); 10241556Srgrimes break; 10251556Srgrimes case NWHILE: 10261556Srgrimes cmdputs("while "); 10271556Srgrimes goto until; 10281556Srgrimes case NUNTIL: 10291556Srgrimes cmdputs("until "); 10301556Srgrimesuntil: 10311556Srgrimes cmdtxt(n->nbinary.ch1); 10321556Srgrimes cmdputs("; do "); 10331556Srgrimes cmdtxt(n->nbinary.ch2); 10341556Srgrimes cmdputs("; done"); 10351556Srgrimes break; 10361556Srgrimes case NFOR: 10371556Srgrimes cmdputs("for "); 10381556Srgrimes cmdputs(n->nfor.var); 10391556Srgrimes cmdputs(" in ..."); 10401556Srgrimes break; 10411556Srgrimes case NCASE: 10421556Srgrimes cmdputs("case "); 10431556Srgrimes cmdputs(n->ncase.expr->narg.text); 10441556Srgrimes cmdputs(" in ..."); 10451556Srgrimes break; 10461556Srgrimes case NDEFUN: 10471556Srgrimes cmdputs(n->narg.text); 10481556Srgrimes cmdputs("() ..."); 10491556Srgrimes break; 10501556Srgrimes case NCMD: 10511556Srgrimes for (np = n->ncmd.args ; np ; np = np->narg.next) { 10521556Srgrimes cmdtxt(np); 10531556Srgrimes if (np->narg.next) 10541556Srgrimes cmdputs(" "); 10551556Srgrimes } 10561556Srgrimes for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { 10571556Srgrimes cmdputs(" "); 10581556Srgrimes cmdtxt(np); 10591556Srgrimes } 10601556Srgrimes break; 10611556Srgrimes case NARG: 10621556Srgrimes cmdputs(n->narg.text); 10631556Srgrimes break; 10641556Srgrimes case NTO: 10651556Srgrimes p = ">"; i = 1; goto redir; 10661556Srgrimes case NAPPEND: 10671556Srgrimes p = ">>"; i = 1; goto redir; 10681556Srgrimes case NTOFD: 10691556Srgrimes p = ">&"; i = 1; goto redir; 107096922Stjr case NCLOBBER: 107196922Stjr p = ">|"; i = 1; goto redir; 10721556Srgrimes case NFROM: 10731556Srgrimes p = "<"; i = 0; goto redir; 107466612Sbrian case NFROMTO: 107566612Sbrian p = "<>"; i = 0; goto redir; 10761556Srgrimes case NFROMFD: 10771556Srgrimes p = "<&"; i = 0; goto redir; 10781556Srgrimesredir: 10791556Srgrimes if (n->nfile.fd != i) { 10801556Srgrimes s[0] = n->nfile.fd + '0'; 10811556Srgrimes s[1] = '\0'; 10821556Srgrimes cmdputs(s); 10831556Srgrimes } 10841556Srgrimes cmdputs(p); 10851556Srgrimes if (n->type == NTOFD || n->type == NFROMFD) { 10861556Srgrimes s[0] = n->ndup.dupfd + '0'; 10871556Srgrimes s[1] = '\0'; 10881556Srgrimes cmdputs(s); 10891556Srgrimes } else { 10901556Srgrimes cmdtxt(n->nfile.fname); 10911556Srgrimes } 10921556Srgrimes break; 10931556Srgrimes case NHERE: 10941556Srgrimes case NXHERE: 10951556Srgrimes cmdputs("<<..."); 10961556Srgrimes break; 10971556Srgrimes default: 10981556Srgrimes cmdputs("???"); 10991556Srgrimes break; 11001556Srgrimes } 11011556Srgrimes} 11021556Srgrimes 11031556Srgrimes 11041556Srgrimes 11051556SrgrimesSTATIC void 110690111Simpcmdputs(char *s) 110790111Simp{ 110825222Ssteve char *p, *q; 110925222Ssteve char c; 11101556Srgrimes int subtype = 0; 11111556Srgrimes 11121556Srgrimes if (cmdnleft <= 0) 11131556Srgrimes return; 11141556Srgrimes p = s; 11151556Srgrimes q = cmdnextc; 11161556Srgrimes while ((c = *p++) != '\0') { 11171556Srgrimes if (c == CTLESC) 11181556Srgrimes *q++ = *p++; 11191556Srgrimes else if (c == CTLVAR) { 11201556Srgrimes *q++ = '$'; 11211556Srgrimes if (--cmdnleft > 0) 11221556Srgrimes *q++ = '{'; 11231556Srgrimes subtype = *p++; 11241556Srgrimes } else if (c == '=' && subtype != 0) { 11251556Srgrimes *q++ = "}-+?="[(subtype & VSTYPE) - VSNORMAL]; 11261556Srgrimes subtype = 0; 11271556Srgrimes } else if (c == CTLENDVAR) { 11281556Srgrimes *q++ = '}'; 112918954Ssteve } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) 11301556Srgrimes cmdnleft++; /* ignore it */ 11311556Srgrimes else 11321556Srgrimes *q++ = c; 11331556Srgrimes if (--cmdnleft <= 0) { 11341556Srgrimes *q++ = '.'; 11351556Srgrimes *q++ = '.'; 11361556Srgrimes *q++ = '.'; 11371556Srgrimes break; 11381556Srgrimes } 11391556Srgrimes } 11401556Srgrimes cmdnextc = q; 11411556Srgrimes} 1142