jobs.c revision 90111
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 90111 2002-02-02 06:50:57Z imp $"; 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"); 2061556Srgrimes pgrp = jp->ps[0].pid; 20720425Ssteve#ifdef OLD_TTY_DRIVER 2081556Srgrimes ioctl(2, TIOCSPGRP, (char *)&pgrp); 20920425Ssteve#else 21020425Ssteve tcsetpgrp(2, pgrp); 21120425Ssteve#endif 2121556Srgrimes restartjob(jp); 2131556Srgrimes INTOFF; 21445916Scracauer status = waitforjob(jp, (int *)NULL); 2151556Srgrimes INTON; 2161556Srgrimes return status; 2171556Srgrimes} 2181556Srgrimes 2191556Srgrimes 22017987Speterint 22190111Simpbgcmd(int argc, char **argv) 22217987Speter{ 2231556Srgrimes struct job *jp; 2241556Srgrimes 2251556Srgrimes do { 2261556Srgrimes jp = getjob(*++argv); 2271556Srgrimes if (jp->jobctl == 0) 2281556Srgrimes error("job not created under job control"); 2291556Srgrimes restartjob(jp); 2301556Srgrimes } while (--argc > 1); 2311556Srgrimes return 0; 2321556Srgrimes} 2331556Srgrimes 2341556Srgrimes 2351556SrgrimesSTATIC void 23690111Simprestartjob(struct job *jp) 23717987Speter{ 2381556Srgrimes struct procstat *ps; 2391556Srgrimes int i; 2401556Srgrimes 2411556Srgrimes if (jp->state == JOBDONE) 2421556Srgrimes return; 2431556Srgrimes INTOFF; 2441556Srgrimes killpg(jp->ps[0].pid, SIGCONT); 2451556Srgrimes for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 24626104Ssteve if (WIFSTOPPED(ps->status)) { 2471556Srgrimes ps->status = -1; 2481556Srgrimes jp->state = 0; 2491556Srgrimes } 2501556Srgrimes } 2511556Srgrimes INTON; 2521556Srgrimes} 2531556Srgrimes#endif 2541556Srgrimes 2551556Srgrimes 2561556Srgrimesint 25790111Simpjobscmd(int argc __unused, char **argv __unused) 25817987Speter{ 2591556Srgrimes showjobs(0); 2601556Srgrimes return 0; 2611556Srgrimes} 2621556Srgrimes 2631556Srgrimes 2641556Srgrimes/* 2651556Srgrimes * Print a list of jobs. If "change" is nonzero, only print jobs whose 2661556Srgrimes * statuses have changed since the last call to showjobs. 2671556Srgrimes * 2681556Srgrimes * If the shell is interrupted in the process of creating a job, the 2691556Srgrimes * result may be a job structure containing zero processes. Such structures 2701556Srgrimes * will be freed here. 2711556Srgrimes */ 2721556Srgrimes 2731556Srgrimesvoid 27490111Simpshowjobs(int change) 27517987Speter{ 2761556Srgrimes int jobno; 2771556Srgrimes int procno; 2781556Srgrimes int i; 2791556Srgrimes struct job *jp; 2801556Srgrimes struct procstat *ps; 2811556Srgrimes int col; 2821556Srgrimes char s[64]; 2831556Srgrimes 2841556Srgrimes TRACE(("showjobs(%d) called\n", change)); 2851556Srgrimes while (dowait(0, (struct job *)NULL) > 0); 2861556Srgrimes for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) { 2871556Srgrimes if (! jp->used) 2881556Srgrimes continue; 2891556Srgrimes if (jp->nprocs == 0) { 2901556Srgrimes freejob(jp); 2911556Srgrimes continue; 2921556Srgrimes } 2931556Srgrimes if (change && ! jp->changed) 2941556Srgrimes continue; 2951556Srgrimes procno = jp->nprocs; 2961556Srgrimes for (ps = jp->ps ; ; ps++) { /* for each process */ 2971556Srgrimes if (ps == jp->ps) 2981556Srgrimes fmtstr(s, 64, "[%d] %d ", jobno, ps->pid); 2991556Srgrimes else 3001556Srgrimes fmtstr(s, 64, " %d ", ps->pid); 3011556Srgrimes out1str(s); 3021556Srgrimes col = strlen(s); 3031556Srgrimes s[0] = '\0'; 3041556Srgrimes if (ps->status == -1) { 3051556Srgrimes /* don't print anything */ 30626104Ssteve } else if (WIFEXITED(ps->status)) { 30726104Ssteve fmtstr(s, 64, "Exit %d", WEXITSTATUS(ps->status)); 3081556Srgrimes } else { 3091556Srgrimes#if JOBS 31026104Ssteve if (WIFSTOPPED(ps->status)) 31126104Ssteve i = WSTOPSIG(ps->status); 31226104Ssteve else 3131556Srgrimes#endif 31426104Ssteve i = WTERMSIG(ps->status); 31517987Speter if ((i & 0x7F) < NSIG && sys_siglist[i & 0x7F]) 31617987Speter scopy(sys_siglist[i & 0x7F], s); 3171556Srgrimes else 3181556Srgrimes fmtstr(s, 64, "Signal %d", i & 0x7F); 31926104Ssteve if (WCOREDUMP(ps->status)) 3201556Srgrimes strcat(s, " (core dumped)"); 3211556Srgrimes } 3221556Srgrimes out1str(s); 3231556Srgrimes col += strlen(s); 3241556Srgrimes do { 3251556Srgrimes out1c(' '); 3261556Srgrimes col++; 3271556Srgrimes } while (col < 30); 3281556Srgrimes out1str(ps->cmd); 3291556Srgrimes out1c('\n'); 3301556Srgrimes if (--procno <= 0) 3311556Srgrimes break; 3321556Srgrimes } 3331556Srgrimes jp->changed = 0; 3341556Srgrimes if (jp->state == JOBDONE) { 3351556Srgrimes freejob(jp); 3361556Srgrimes } 3371556Srgrimes } 3381556Srgrimes} 3391556Srgrimes 3401556Srgrimes 3411556Srgrimes/* 3421556Srgrimes * Mark a job structure as unused. 3431556Srgrimes */ 3441556Srgrimes 3451556SrgrimesSTATIC void 34690111Simpfreejob(struct job *jp) 34790111Simp{ 3481556Srgrimes struct procstat *ps; 3491556Srgrimes int i; 3501556Srgrimes 3511556Srgrimes INTOFF; 3521556Srgrimes for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { 3531556Srgrimes if (ps->cmd != nullstr) 3541556Srgrimes ckfree(ps->cmd); 3551556Srgrimes } 3561556Srgrimes if (jp->ps != &jp->ps0) 3571556Srgrimes ckfree(jp->ps); 3581556Srgrimes jp->used = 0; 3591556Srgrimes#if JOBS 3601556Srgrimes if (curjob == jp - jobtab + 1) 3611556Srgrimes curjob = 0; 3621556Srgrimes#endif 3631556Srgrimes INTON; 3641556Srgrimes} 3651556Srgrimes 3661556Srgrimes 3671556Srgrimes 3681556Srgrimesint 36990111Simpwaitcmd(int argc, char **argv) 37017987Speter{ 3711556Srgrimes struct job *job; 37226104Ssteve int status, retval; 3731556Srgrimes struct job *jp; 3741556Srgrimes 3751556Srgrimes if (argc > 1) { 3761556Srgrimes job = getjob(argv[1]); 3771556Srgrimes } else { 3781556Srgrimes job = NULL; 3791556Srgrimes } 38038536Scracauer 38138536Scracauer /* 38238536Scracauer * Loop until a process is terminated or stopped, or a SIGINT is 38338536Scracauer * received. 38438536Scracauer */ 38538536Scracauer 38638521Scracauer in_waitcmd++; 38738536Scracauer do { 3881556Srgrimes if (job != NULL) { 3891556Srgrimes if (job->state) { 3901556Srgrimes status = job->ps[job->nprocs - 1].status; 39126104Ssteve if (WIFEXITED(status)) 39226104Ssteve retval = WEXITSTATUS(status); 3931556Srgrimes#if JOBS 39426104Ssteve else if (WIFSTOPPED(status)) 39526104Ssteve retval = WSTOPSIG(status) + 128; 3961556Srgrimes#endif 3971556Srgrimes else 39826104Ssteve retval = WTERMSIG(status) + 128; 3991556Srgrimes if (! iflag) 4001556Srgrimes freejob(job); 40138536Scracauer in_waitcmd--; 40226104Ssteve return retval; 4031556Srgrimes } 4041556Srgrimes } else { 4051556Srgrimes for (jp = jobtab ; ; jp++) { 4061556Srgrimes if (jp >= jobtab + njobs) { /* no running procs */ 40738536Scracauer in_waitcmd--; 4081556Srgrimes return 0; 4091556Srgrimes } 4101556Srgrimes if (jp->used && jp->state == 0) 4111556Srgrimes break; 4121556Srgrimes } 4131556Srgrimes } 41438521Scracauer } while (dowait(1, (struct job *)NULL) != -1); 41538521Scracauer in_waitcmd--; 41638521Scracauer 41738521Scracauer return 0; 4181556Srgrimes} 4191556Srgrimes 4201556Srgrimes 4211556Srgrimes 42217987Speterint 42390111Simpjobidcmd(int argc __unused, char **argv) 42417987Speter{ 4251556Srgrimes struct job *jp; 4261556Srgrimes int i; 4271556Srgrimes 4281556Srgrimes jp = getjob(argv[1]); 4291556Srgrimes for (i = 0 ; i < jp->nprocs ; ) { 4301556Srgrimes out1fmt("%d", jp->ps[i].pid); 4311556Srgrimes out1c(++i < jp->nprocs? ' ' : '\n'); 4321556Srgrimes } 4331556Srgrimes return 0; 4341556Srgrimes} 4351556Srgrimes 4361556Srgrimes 4371556Srgrimes 4381556Srgrimes/* 4391556Srgrimes * Convert a job name to a job structure. 4401556Srgrimes */ 4411556Srgrimes 4421556SrgrimesSTATIC struct job * 44390111Simpgetjob(char *name) 44490111Simp{ 4451556Srgrimes int jobno; 44625222Ssteve struct job *jp; 4471556Srgrimes int pid; 4481556Srgrimes int i; 4491556Srgrimes 4501556Srgrimes if (name == NULL) { 4511556Srgrimes#if JOBS 4521556Srgrimescurrentjob: 4531556Srgrimes if ((jobno = curjob) == 0 || jobtab[jobno - 1].used == 0) 4541556Srgrimes error("No current job"); 4551556Srgrimes return &jobtab[jobno - 1]; 4561556Srgrimes#else 4571556Srgrimes error("No current job"); 4581556Srgrimes#endif 4591556Srgrimes } else if (name[0] == '%') { 4601556Srgrimes if (is_digit(name[1])) { 4611556Srgrimes jobno = number(name + 1); 4621556Srgrimes if (jobno > 0 && jobno <= njobs 4631556Srgrimes && jobtab[jobno - 1].used != 0) 4641556Srgrimes return &jobtab[jobno - 1]; 4651556Srgrimes#if JOBS 4661556Srgrimes } else if (name[1] == '%' && name[2] == '\0') { 4671556Srgrimes goto currentjob; 4681556Srgrimes#endif 4691556Srgrimes } else { 47025222Ssteve struct job *found = NULL; 4711556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 4721556Srgrimes if (jp->used && jp->nprocs > 0 4731556Srgrimes && prefix(name + 1, jp->ps[0].cmd)) { 4741556Srgrimes if (found) 4751556Srgrimes error("%s: ambiguous", name); 4761556Srgrimes found = jp; 4771556Srgrimes } 4781556Srgrimes } 4791556Srgrimes if (found) 4801556Srgrimes return found; 4811556Srgrimes } 4821556Srgrimes } else if (is_number(name)) { 4831556Srgrimes pid = number(name); 4841556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 4851556Srgrimes if (jp->used && jp->nprocs > 0 4861556Srgrimes && jp->ps[jp->nprocs - 1].pid == pid) 4871556Srgrimes return jp; 4881556Srgrimes } 4891556Srgrimes } 4901556Srgrimes error("No such job: %s", name); 49117987Speter /*NOTREACHED*/ 49217987Speter return NULL; 4931556Srgrimes} 4941556Srgrimes 4951556Srgrimes 4961556Srgrimes 4971556Srgrimes/* 4981556Srgrimes * Return a new job structure, 4991556Srgrimes */ 5001556Srgrimes 5011556Srgrimesstruct job * 50290111Simpmakejob(union node *node __unused, int nprocs) 50317987Speter{ 5041556Srgrimes int i; 5051556Srgrimes struct job *jp; 5061556Srgrimes 5071556Srgrimes for (i = njobs, jp = jobtab ; ; jp++) { 5081556Srgrimes if (--i < 0) { 5091556Srgrimes INTOFF; 5101556Srgrimes if (njobs == 0) { 5111556Srgrimes jobtab = ckmalloc(4 * sizeof jobtab[0]); 5121556Srgrimes } else { 5131556Srgrimes jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); 51417987Speter memcpy(jp, jobtab, njobs * sizeof jp[0]); 51520425Ssteve /* Relocate `ps' pointers */ 51620425Ssteve for (i = 0; i < njobs; i++) 51720425Ssteve if (jp[i].ps == &jobtab[i].ps0) 51820425Ssteve jp[i].ps = &jp[i].ps0; 5191556Srgrimes ckfree(jobtab); 5201556Srgrimes jobtab = jp; 5211556Srgrimes } 5221556Srgrimes jp = jobtab + njobs; 5231556Srgrimes for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0); 5241556Srgrimes INTON; 5251556Srgrimes break; 5261556Srgrimes } 5271556Srgrimes if (jp->used == 0) 5281556Srgrimes break; 5291556Srgrimes } 5301556Srgrimes INTOFF; 5311556Srgrimes jp->state = 0; 5321556Srgrimes jp->used = 1; 5331556Srgrimes jp->changed = 0; 5341556Srgrimes jp->nprocs = 0; 5351556Srgrimes#if JOBS 5361556Srgrimes jp->jobctl = jobctl; 5371556Srgrimes#endif 5381556Srgrimes if (nprocs > 1) { 5391556Srgrimes jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); 5401556Srgrimes } else { 5411556Srgrimes jp->ps = &jp->ps0; 5421556Srgrimes } 5431556Srgrimes INTON; 54417987Speter TRACE(("makejob(0x%lx, %d) returns %%%d\n", (long)node, nprocs, 54517987Speter jp - jobtab + 1)); 5461556Srgrimes return jp; 5478855Srgrimes} 5481556Srgrimes 5491556Srgrimes 5501556Srgrimes/* 5511556Srgrimes * Fork of a subshell. If we are doing job control, give the subshell its 5521556Srgrimes * own process group. Jp is a job structure that the job is to be added to. 5531556Srgrimes * N is the command that will be evaluated by the child. Both jp and n may 5541556Srgrimes * be NULL. The mode parameter can be one of the following: 5551556Srgrimes * FORK_FG - Fork off a foreground process. 5561556Srgrimes * FORK_BG - Fork off a background process. 5571556Srgrimes * FORK_NOJOB - Like FORK_FG, but don't give the process its own 5581556Srgrimes * process group even if job control is on. 5591556Srgrimes * 5601556Srgrimes * When job control is turned off, background processes have their standard 5611556Srgrimes * input redirected to /dev/null (except for the second and later processes 5621556Srgrimes * in a pipeline). 5631556Srgrimes */ 5641556Srgrimes 5651556Srgrimesint 56690111Simpforkshell(struct job *jp, union node *n, int mode) 56717987Speter{ 5681556Srgrimes int pid; 5691556Srgrimes int pgrp; 5701556Srgrimes 57117987Speter TRACE(("forkshell(%%%d, 0x%lx, %d) called\n", jp - jobtab, (long)n, 57217987Speter mode)); 5731556Srgrimes INTOFF; 5741556Srgrimes pid = fork(); 5751556Srgrimes if (pid == -1) { 5761556Srgrimes TRACE(("Fork failed, errno=%d\n", errno)); 5771556Srgrimes INTON; 57853891Scracauer error("Cannot fork: %s", strerror(errno)); 5791556Srgrimes } 5801556Srgrimes if (pid == 0) { 5811556Srgrimes struct job *p; 5821556Srgrimes int wasroot; 5831556Srgrimes int i; 5841556Srgrimes 5851556Srgrimes TRACE(("Child shell %d\n", getpid())); 5861556Srgrimes wasroot = rootshell; 5871556Srgrimes rootshell = 0; 5881556Srgrimes for (i = njobs, p = jobtab ; --i >= 0 ; p++) 5891556Srgrimes if (p->used) 5901556Srgrimes freejob(p); 5911556Srgrimes closescript(); 5921556Srgrimes INTON; 5931556Srgrimes clear_traps(); 5941556Srgrimes#if JOBS 5951556Srgrimes jobctl = 0; /* do job control only in root shell */ 5961556Srgrimes if (wasroot && mode != FORK_NOJOB && mflag) { 5971556Srgrimes if (jp == NULL || jp->nprocs == 0) 5981556Srgrimes pgrp = getpid(); 5991556Srgrimes else 6001556Srgrimes pgrp = jp->ps[0].pid; 60121352Ssteve if (setpgid(0, pgrp) == 0 && mode == FORK_FG) { 6021556Srgrimes /*** this causes superfluous TIOCSPGRPS ***/ 60320425Ssteve#ifdef OLD_TTY_DRIVER 6041556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&pgrp) < 0) 60518016Speter error("TIOCSPGRP failed, errno=%d", errno); 60620425Ssteve#else 60720425Ssteve if (tcsetpgrp(2, pgrp) < 0) 60820425Ssteve error("tcsetpgrp failed, errno=%d", errno); 60920425Ssteve#endif 6101556Srgrimes } 6111556Srgrimes setsignal(SIGTSTP); 6121556Srgrimes setsignal(SIGTTOU); 6131556Srgrimes } else if (mode == FORK_BG) { 6141556Srgrimes ignoresig(SIGINT); 6151556Srgrimes ignoresig(SIGQUIT); 6161556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 6171556Srgrimes ! fd0_redirected_p ()) { 6181556Srgrimes close(0); 61969793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 62069793Sobrien error("Can't open %s: %s", 62169793Sobrien _PATH_DEVNULL, strerror(errno)); 6221556Srgrimes } 6231556Srgrimes } 6241556Srgrimes#else 6251556Srgrimes if (mode == FORK_BG) { 6261556Srgrimes ignoresig(SIGINT); 6271556Srgrimes ignoresig(SIGQUIT); 6281556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 6291556Srgrimes ! fd0_redirected_p ()) { 6301556Srgrimes close(0); 63169793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 63269793Sobrien error("Can't open %s: %s", 63369793Sobrien _PATH_DEVNULL, strerror(errno)); 6341556Srgrimes } 6351556Srgrimes } 6361556Srgrimes#endif 6371556Srgrimes if (wasroot && iflag) { 6381556Srgrimes setsignal(SIGINT); 6391556Srgrimes setsignal(SIGQUIT); 6401556Srgrimes setsignal(SIGTERM); 6411556Srgrimes } 6421556Srgrimes return pid; 6431556Srgrimes } 6441556Srgrimes if (rootshell && mode != FORK_NOJOB && mflag) { 6451556Srgrimes if (jp == NULL || jp->nprocs == 0) 6461556Srgrimes pgrp = pid; 6471556Srgrimes else 6481556Srgrimes pgrp = jp->ps[0].pid; 64917987Speter setpgid(pid, pgrp); 6501556Srgrimes } 6511556Srgrimes if (mode == FORK_BG) 6521556Srgrimes backgndpid = pid; /* set $! */ 6531556Srgrimes if (jp) { 6541556Srgrimes struct procstat *ps = &jp->ps[jp->nprocs++]; 6551556Srgrimes ps->pid = pid; 6561556Srgrimes ps->status = -1; 6571556Srgrimes ps->cmd = nullstr; 6581556Srgrimes if (iflag && rootshell && n) 6591556Srgrimes ps->cmd = commandtext(n); 6601556Srgrimes } 6611556Srgrimes INTON; 6621556Srgrimes TRACE(("In parent shell: child = %d\n", pid)); 6631556Srgrimes return pid; 6641556Srgrimes} 6651556Srgrimes 6661556Srgrimes 6671556Srgrimes 6681556Srgrimes/* 6691556Srgrimes * Wait for job to finish. 6701556Srgrimes * 6711556Srgrimes * Under job control we have the problem that while a child process is 6721556Srgrimes * running interrupts generated by the user are sent to the child but not 6731556Srgrimes * to the shell. This means that an infinite loop started by an inter- 6741556Srgrimes * active user may be hard to kill. With job control turned off, an 6751556Srgrimes * interactive user may place an interactive program inside a loop. If 6761556Srgrimes * the interactive program catches interrupts, the user doesn't want 6771556Srgrimes * these interrupts to also abort the loop. The approach we take here 6781556Srgrimes * is to have the shell ignore interrupt signals while waiting for a 67946684Skris * foreground process to terminate, and then send itself an interrupt 6801556Srgrimes * signal if the child process was terminated by an interrupt signal. 6811556Srgrimes * Unfortunately, some programs want to do a bit of cleanup and then 6821556Srgrimes * exit on interrupt; unless these processes terminate themselves by 6831556Srgrimes * sending a signal to themselves (instead of calling exit) they will 6841556Srgrimes * confuse this approach. 6851556Srgrimes */ 6861556Srgrimes 6871556Srgrimesint 68890111Simpwaitforjob(struct job *jp, int *origstatus) 68945916Scracauer{ 6901556Srgrimes#if JOBS 69117987Speter int mypgrp = getpgrp(); 6921556Srgrimes#endif 6931556Srgrimes int status; 6941556Srgrimes int st; 6951556Srgrimes 6961556Srgrimes INTOFF; 6971556Srgrimes TRACE(("waitforjob(%%%d) called\n", jp - jobtab + 1)); 69838950Scracauer while (jp->state == 0) 69938950Scracauer if (dowait(1, jp) == -1) 70038950Scracauer dotrap(); 7011556Srgrimes#if JOBS 7021556Srgrimes if (jp->jobctl) { 70320425Ssteve#ifdef OLD_TTY_DRIVER 7041556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&mypgrp) < 0) 70520425Ssteve error("TIOCSPGRP failed, errno=%d\n", errno); 70620425Ssteve#else 70720425Ssteve if (tcsetpgrp(2, mypgrp) < 0) 70820425Ssteve error("tcsetpgrp failed, errno=%d\n", errno); 70920425Ssteve#endif 7101556Srgrimes } 7111556Srgrimes if (jp->state == JOBSTOPPED) 7121556Srgrimes curjob = jp - jobtab + 1; 7131556Srgrimes#endif 7141556Srgrimes status = jp->ps[jp->nprocs - 1].status; 71545916Scracauer if (origstatus != NULL) 71645916Scracauer *origstatus = status; 7171556Srgrimes /* convert to 8 bits */ 71826104Ssteve if (WIFEXITED(status)) 71926104Ssteve st = WEXITSTATUS(status); 7201556Srgrimes#if JOBS 72126104Ssteve else if (WIFSTOPPED(status)) 72226104Ssteve st = WSTOPSIG(status) + 128; 7231556Srgrimes#endif 7241556Srgrimes else 72526104Ssteve st = WTERMSIG(status) + 128; 7261556Srgrimes if (! JOBS || jp->state == JOBDONE) 7271556Srgrimes freejob(jp); 72838521Scracauer if (int_pending()) { 72938521Scracauer if (WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) 73038521Scracauer kill(getpid(), SIGINT); 73138521Scracauer else 73238521Scracauer CLEAR_PENDING_INT; 73338521Scracauer } 7341556Srgrimes INTON; 7351556Srgrimes return st; 7361556Srgrimes} 7371556Srgrimes 7381556Srgrimes 7391556Srgrimes 7401556Srgrimes/* 7411556Srgrimes * Wait for a process to terminate. 7421556Srgrimes */ 7431556Srgrimes 7441556SrgrimesSTATIC int 74590111Simpdowait(int block, struct job *job) 74617987Speter{ 7471556Srgrimes int pid; 7481556Srgrimes int status; 7491556Srgrimes struct procstat *sp; 7501556Srgrimes struct job *jp; 7511556Srgrimes struct job *thisjob; 7521556Srgrimes int done; 7531556Srgrimes int stopped; 7541556Srgrimes int core; 75526104Ssteve int sig; 7561556Srgrimes 75738950Scracauer in_dowait++; 7581556Srgrimes TRACE(("dowait(%d) called\n", block)); 7591556Srgrimes do { 7601556Srgrimes pid = waitproc(block, &status); 7611556Srgrimes TRACE(("wait returns %d, status=%d\n", pid, status)); 76272086Scracauer } while ((pid == -1 && errno == EINTR && breakwaitcmd == 0) || 76372086Scracauer (WIFSTOPPED(status) && !iflag)); 76438950Scracauer in_dowait--; 76538521Scracauer if (breakwaitcmd != 0) { 76638521Scracauer breakwaitcmd = 0; 76738521Scracauer return -1; 76838521Scracauer } 7691556Srgrimes if (pid <= 0) 7701556Srgrimes return pid; 7711556Srgrimes INTOFF; 7721556Srgrimes thisjob = NULL; 7731556Srgrimes for (jp = jobtab ; jp < jobtab + njobs ; jp++) { 7741556Srgrimes if (jp->used) { 7751556Srgrimes done = 1; 7761556Srgrimes stopped = 1; 7771556Srgrimes for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { 7781556Srgrimes if (sp->pid == -1) 7791556Srgrimes continue; 7801556Srgrimes if (sp->pid == pid) { 78126104Ssteve TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", 78226104Ssteve pid, sp->status, status)); 7831556Srgrimes sp->status = status; 7841556Srgrimes thisjob = jp; 7851556Srgrimes } 7861556Srgrimes if (sp->status == -1) 7871556Srgrimes stopped = 0; 78826104Ssteve else if (WIFSTOPPED(sp->status)) 7891556Srgrimes done = 0; 7901556Srgrimes } 7911556Srgrimes if (stopped) { /* stopped or done */ 7921556Srgrimes int state = done? JOBDONE : JOBSTOPPED; 7931556Srgrimes if (jp->state != state) { 7941556Srgrimes TRACE(("Job %d: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); 7951556Srgrimes jp->state = state; 7961556Srgrimes#if JOBS 7971556Srgrimes if (done && curjob == jp - jobtab + 1) 7981556Srgrimes curjob = 0; /* no current job */ 7991556Srgrimes#endif 8001556Srgrimes } 8011556Srgrimes } 8021556Srgrimes } 8031556Srgrimes } 8041556Srgrimes INTON; 8051556Srgrimes if (! rootshell || ! iflag || (job && thisjob == job)) { 80626104Ssteve core = WCOREDUMP(status); 8071556Srgrimes#if JOBS 80826104Ssteve if (WIFSTOPPED(status)) 80926104Ssteve sig = WSTOPSIG(status); 81026104Ssteve else 8111556Srgrimes#endif 81226104Ssteve if (WIFEXITED(status)) 81326104Ssteve sig = 0; 81426104Ssteve else 81526104Ssteve sig = WTERMSIG(status); 81626104Ssteve 81726104Ssteve if (sig != 0 && sig != SIGINT && sig != SIGPIPE) { 8181556Srgrimes if (thisjob != job) 8191556Srgrimes outfmt(out2, "%d: ", pid); 8201556Srgrimes#if JOBS 82126104Ssteve if (sig == SIGTSTP && rootshell && iflag) 8221556Srgrimes outfmt(out2, "%%%d ", job - jobtab + 1); 8231556Srgrimes#endif 82426104Ssteve if (sig < NSIG && sys_siglist[sig]) 82526104Ssteve out2str(sys_siglist[sig]); 8261556Srgrimes else 82726104Ssteve outfmt(out2, "Signal %d", sig); 8281556Srgrimes if (core) 8291556Srgrimes out2str(" - core dumped"); 8301556Srgrimes out2c('\n'); 8311556Srgrimes flushout(&errout); 8321556Srgrimes } else { 83326104Ssteve TRACE(("Not printing status: status=%d, sig=%d\n", 83426104Ssteve status, sig)); 8351556Srgrimes } 8361556Srgrimes } else { 8371556Srgrimes TRACE(("Not printing status, rootshell=%d, job=0x%x\n", rootshell, job)); 8381556Srgrimes if (thisjob) 8391556Srgrimes thisjob->changed = 1; 8401556Srgrimes } 8411556Srgrimes return pid; 8421556Srgrimes} 8431556Srgrimes 8441556Srgrimes 8451556Srgrimes 8461556Srgrimes/* 8471556Srgrimes * Do a wait system call. If job control is compiled in, we accept 8481556Srgrimes * stopped processes. If block is zero, we return a value of zero 8491556Srgrimes * rather than blocking. 8501556Srgrimes * 8511556Srgrimes * System V doesn't have a non-blocking wait system call. It does 8521556Srgrimes * have a SIGCLD signal that is sent to a process when one of it's 8531556Srgrimes * children dies. The obvious way to use SIGCLD would be to install 8541556Srgrimes * a handler for SIGCLD which simply bumped a counter when a SIGCLD 8551556Srgrimes * was received, and have waitproc bump another counter when it got 8561556Srgrimes * the status of a process. Waitproc would then know that a wait 8571556Srgrimes * system call would not block if the two counters were different. 8581556Srgrimes * This approach doesn't work because if a process has children that 8591556Srgrimes * have not been waited for, System V will send it a SIGCLD when it 8601556Srgrimes * installs a signal handler for SIGCLD. What this means is that when 8611556Srgrimes * a child exits, the shell will be sent SIGCLD signals continuously 8621556Srgrimes * until is runs out of stack space, unless it does a wait call before 8631556Srgrimes * restoring the signal handler. The code below takes advantage of 8641556Srgrimes * this (mis)feature by installing a signal handler for SIGCLD and 8651556Srgrimes * then checking to see whether it was called. If there are any 8661556Srgrimes * children to be waited for, it will be. 8671556Srgrimes * 8681556Srgrimes * If neither SYSV nor BSD is defined, we don't implement nonblocking 8691556Srgrimes * waits at all. In this case, the user will not be informed when 8701556Srgrimes * a background process until the next time she runs a real program 8711556Srgrimes * (as opposed to running a builtin command or just typing return), 8721556Srgrimes * and the jobs command may give out of date information. 8731556Srgrimes */ 8741556Srgrimes 8751556Srgrimes#ifdef SYSV 87638521ScracauerSTATIC sig_atomic_t gotsigchild; 8771556Srgrimes 8781556SrgrimesSTATIC int onsigchild() { 8791556Srgrimes gotsigchild = 1; 8801556Srgrimes} 8811556Srgrimes#endif 8821556Srgrimes 8831556Srgrimes 8841556SrgrimesSTATIC int 88590111Simpwaitproc(int block, int *status) 88617987Speter{ 8871556Srgrimes#ifdef BSD 8881556Srgrimes int flags; 8891556Srgrimes 8901556Srgrimes#if JOBS 8911556Srgrimes flags = WUNTRACED; 8921556Srgrimes#else 8931556Srgrimes flags = 0; 8941556Srgrimes#endif 8951556Srgrimes if (block == 0) 8961556Srgrimes flags |= WNOHANG; 8971556Srgrimes return wait3(status, flags, (struct rusage *)NULL); 8981556Srgrimes#else 8991556Srgrimes#ifdef SYSV 9001556Srgrimes int (*save)(); 9011556Srgrimes 9021556Srgrimes if (block == 0) { 9031556Srgrimes gotsigchild = 0; 9041556Srgrimes save = signal(SIGCLD, onsigchild); 9051556Srgrimes signal(SIGCLD, save); 9061556Srgrimes if (gotsigchild == 0) 9071556Srgrimes return 0; 9081556Srgrimes } 9091556Srgrimes return wait(status); 9101556Srgrimes#else 9111556Srgrimes if (block == 0) 9121556Srgrimes return 0; 9131556Srgrimes return wait(status); 9141556Srgrimes#endif 9151556Srgrimes#endif 9161556Srgrimes} 9171556Srgrimes 9181556Srgrimes/* 9191556Srgrimes * return 1 if there are stopped jobs, otherwise 0 9201556Srgrimes */ 9211556Srgrimesint job_warning = 0; 9221556Srgrimesint 92390111Simpstoppedjobs(void) 9241556Srgrimes{ 92525222Ssteve int jobno; 92625222Ssteve struct job *jp; 9271556Srgrimes 9281556Srgrimes if (job_warning) 9291556Srgrimes return (0); 9301556Srgrimes for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { 9311556Srgrimes if (jp->used == 0) 9321556Srgrimes continue; 9331556Srgrimes if (jp->state == JOBSTOPPED) { 9341556Srgrimes out2str("You have stopped jobs.\n"); 9351556Srgrimes job_warning = 2; 9361556Srgrimes return (1); 9371556Srgrimes } 9381556Srgrimes } 9391556Srgrimes 9401556Srgrimes return (0); 9411556Srgrimes} 9421556Srgrimes 9431556Srgrimes/* 9441556Srgrimes * Return a string identifying a command (to be printed by the 9451556Srgrimes * jobs command. 9461556Srgrimes */ 9471556Srgrimes 9481556SrgrimesSTATIC char *cmdnextc; 9491556SrgrimesSTATIC int cmdnleft; 9501556Srgrimes#define MAXCMDTEXT 200 9511556Srgrimes 9521556Srgrimeschar * 95390111Simpcommandtext(union node *n) 95490111Simp{ 9551556Srgrimes char *name; 9561556Srgrimes 9571556Srgrimes cmdnextc = name = ckmalloc(MAXCMDTEXT); 9581556Srgrimes cmdnleft = MAXCMDTEXT - 4; 9591556Srgrimes cmdtxt(n); 9601556Srgrimes *cmdnextc = '\0'; 9611556Srgrimes return name; 9621556Srgrimes} 9631556Srgrimes 9641556Srgrimes 9651556SrgrimesSTATIC void 96690111Simpcmdtxt(union node *n) 96790111Simp{ 9681556Srgrimes union node *np; 9691556Srgrimes struct nodelist *lp; 9701556Srgrimes char *p; 9711556Srgrimes int i; 9721556Srgrimes char s[2]; 9731556Srgrimes 9741556Srgrimes if (n == NULL) 9751556Srgrimes return; 9761556Srgrimes switch (n->type) { 9771556Srgrimes case NSEMI: 9781556Srgrimes cmdtxt(n->nbinary.ch1); 9791556Srgrimes cmdputs("; "); 9801556Srgrimes cmdtxt(n->nbinary.ch2); 9811556Srgrimes break; 9821556Srgrimes case NAND: 9831556Srgrimes cmdtxt(n->nbinary.ch1); 9841556Srgrimes cmdputs(" && "); 9851556Srgrimes cmdtxt(n->nbinary.ch2); 9861556Srgrimes break; 9871556Srgrimes case NOR: 9881556Srgrimes cmdtxt(n->nbinary.ch1); 9891556Srgrimes cmdputs(" || "); 9901556Srgrimes cmdtxt(n->nbinary.ch2); 9911556Srgrimes break; 9921556Srgrimes case NPIPE: 9931556Srgrimes for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 9941556Srgrimes cmdtxt(lp->n); 9951556Srgrimes if (lp->next) 9961556Srgrimes cmdputs(" | "); 9971556Srgrimes } 9981556Srgrimes break; 9991556Srgrimes case NSUBSHELL: 10001556Srgrimes cmdputs("("); 10011556Srgrimes cmdtxt(n->nredir.n); 10021556Srgrimes cmdputs(")"); 10031556Srgrimes break; 10041556Srgrimes case NREDIR: 10051556Srgrimes case NBACKGND: 10061556Srgrimes cmdtxt(n->nredir.n); 10071556Srgrimes break; 10081556Srgrimes case NIF: 10091556Srgrimes cmdputs("if "); 10101556Srgrimes cmdtxt(n->nif.test); 10111556Srgrimes cmdputs("; then "); 10121556Srgrimes cmdtxt(n->nif.ifpart); 10131556Srgrimes cmdputs("..."); 10141556Srgrimes break; 10151556Srgrimes case NWHILE: 10161556Srgrimes cmdputs("while "); 10171556Srgrimes goto until; 10181556Srgrimes case NUNTIL: 10191556Srgrimes cmdputs("until "); 10201556Srgrimesuntil: 10211556Srgrimes cmdtxt(n->nbinary.ch1); 10221556Srgrimes cmdputs("; do "); 10231556Srgrimes cmdtxt(n->nbinary.ch2); 10241556Srgrimes cmdputs("; done"); 10251556Srgrimes break; 10261556Srgrimes case NFOR: 10271556Srgrimes cmdputs("for "); 10281556Srgrimes cmdputs(n->nfor.var); 10291556Srgrimes cmdputs(" in ..."); 10301556Srgrimes break; 10311556Srgrimes case NCASE: 10321556Srgrimes cmdputs("case "); 10331556Srgrimes cmdputs(n->ncase.expr->narg.text); 10341556Srgrimes cmdputs(" in ..."); 10351556Srgrimes break; 10361556Srgrimes case NDEFUN: 10371556Srgrimes cmdputs(n->narg.text); 10381556Srgrimes cmdputs("() ..."); 10391556Srgrimes break; 10401556Srgrimes case NCMD: 10411556Srgrimes for (np = n->ncmd.args ; np ; np = np->narg.next) { 10421556Srgrimes cmdtxt(np); 10431556Srgrimes if (np->narg.next) 10441556Srgrimes cmdputs(" "); 10451556Srgrimes } 10461556Srgrimes for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { 10471556Srgrimes cmdputs(" "); 10481556Srgrimes cmdtxt(np); 10491556Srgrimes } 10501556Srgrimes break; 10511556Srgrimes case NARG: 10521556Srgrimes cmdputs(n->narg.text); 10531556Srgrimes break; 10541556Srgrimes case NTO: 10551556Srgrimes p = ">"; i = 1; goto redir; 10561556Srgrimes case NAPPEND: 10571556Srgrimes p = ">>"; i = 1; goto redir; 10581556Srgrimes case NTOFD: 10591556Srgrimes p = ">&"; i = 1; goto redir; 10601556Srgrimes case NFROM: 10611556Srgrimes p = "<"; i = 0; goto redir; 106266612Sbrian case NFROMTO: 106366612Sbrian p = "<>"; i = 0; goto redir; 10641556Srgrimes case NFROMFD: 10651556Srgrimes p = "<&"; i = 0; goto redir; 10661556Srgrimesredir: 10671556Srgrimes if (n->nfile.fd != i) { 10681556Srgrimes s[0] = n->nfile.fd + '0'; 10691556Srgrimes s[1] = '\0'; 10701556Srgrimes cmdputs(s); 10711556Srgrimes } 10721556Srgrimes cmdputs(p); 10731556Srgrimes if (n->type == NTOFD || n->type == NFROMFD) { 10741556Srgrimes s[0] = n->ndup.dupfd + '0'; 10751556Srgrimes s[1] = '\0'; 10761556Srgrimes cmdputs(s); 10771556Srgrimes } else { 10781556Srgrimes cmdtxt(n->nfile.fname); 10791556Srgrimes } 10801556Srgrimes break; 10811556Srgrimes case NHERE: 10821556Srgrimes case NXHERE: 10831556Srgrimes cmdputs("<<..."); 10841556Srgrimes break; 10851556Srgrimes default: 10861556Srgrimes cmdputs("???"); 10871556Srgrimes break; 10881556Srgrimes } 10891556Srgrimes} 10901556Srgrimes 10911556Srgrimes 10921556Srgrimes 10931556SrgrimesSTATIC void 109490111Simpcmdputs(char *s) 109590111Simp{ 109625222Ssteve char *p, *q; 109725222Ssteve char c; 10981556Srgrimes int subtype = 0; 10991556Srgrimes 11001556Srgrimes if (cmdnleft <= 0) 11011556Srgrimes return; 11021556Srgrimes p = s; 11031556Srgrimes q = cmdnextc; 11041556Srgrimes while ((c = *p++) != '\0') { 11051556Srgrimes if (c == CTLESC) 11061556Srgrimes *q++ = *p++; 11071556Srgrimes else if (c == CTLVAR) { 11081556Srgrimes *q++ = '$'; 11091556Srgrimes if (--cmdnleft > 0) 11101556Srgrimes *q++ = '{'; 11111556Srgrimes subtype = *p++; 11121556Srgrimes } else if (c == '=' && subtype != 0) { 11131556Srgrimes *q++ = "}-+?="[(subtype & VSTYPE) - VSNORMAL]; 11141556Srgrimes subtype = 0; 11151556Srgrimes } else if (c == CTLENDVAR) { 11161556Srgrimes *q++ = '}'; 111718954Ssteve } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) 11181556Srgrimes cmdnleft++; /* ignore it */ 11191556Srgrimes else 11201556Srgrimes *q++ = c; 11211556Srgrimes if (--cmdnleft <= 0) { 11221556Srgrimes *q++ = '.'; 11231556Srgrimes *q++ = '.'; 11241556Srgrimes *q++ = '.'; 11251556Srgrimes break; 11261556Srgrimes } 11271556Srgrimes } 11281556Srgrimes cmdnextc = q; 11291556Srgrimes} 1130