jobs.c revision 36150
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[] = 4236150Scharnier "$Id$"; 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 901556Srgrimes 9120425Ssteve#if JOBS 9217987SpeterSTATIC void restartjob __P((struct job *)); 9320425Ssteve#endif 9417987SpeterSTATIC void freejob __P((struct job *)); 9517987SpeterSTATIC struct job *getjob __P((char *)); 9617987SpeterSTATIC int dowait __P((int, struct job *)); 9720425Ssteve#if SYSV 9817987SpeterSTATIC int onsigchild __P((void)); 9920425Ssteve#endif 10017987SpeterSTATIC int waitproc __P((int, int *)); 10117987SpeterSTATIC void cmdtxt __P((union node *)); 10217987SpeterSTATIC void cmdputs __P((char *)); 1031556Srgrimes 1041556Srgrimes 1051556Srgrimes/* 1061556Srgrimes * Turn job control on and off. 1071556Srgrimes * 1081556Srgrimes * Note: This code assumes that the third arg to ioctl is a character 1091556Srgrimes * pointer, which is true on Berkeley systems but not System V. Since 1101556Srgrimes * System V doesn't have job control yet, this isn't a problem now. 1111556Srgrimes */ 1121556Srgrimes 1131556SrgrimesMKINIT int jobctl; 1141556Srgrimes 11520425Ssteve#if JOBS 1161556Srgrimesvoid 11720425Sstevesetjobctl(on) 11817987Speter int on; 11917987Speter{ 1201556Srgrimes#ifdef OLD_TTY_DRIVER 1211556Srgrimes int ldisc; 1221556Srgrimes#endif 1231556Srgrimes 1241556Srgrimes if (on == jobctl || rootshell == 0) 1251556Srgrimes return; 1261556Srgrimes if (on) { 1271556Srgrimes do { /* while we are in the background */ 12820425Ssteve#ifdef OLD_TTY_DRIVER 1291556Srgrimes if (ioctl(2, TIOCGPGRP, (char *)&initialpgrp) < 0) { 13020425Ssteve#else 13120425Ssteve initialpgrp = tcgetpgrp(2); 13220425Ssteve if (initialpgrp < 0) { 13320425Ssteve#endif 1341556Srgrimes out2str("sh: can't access tty; job control turned off\n"); 1351556Srgrimes mflag = 0; 1361556Srgrimes return; 1371556Srgrimes } 1381556Srgrimes if (initialpgrp == -1) 13917987Speter initialpgrp = getpgrp(); 14017987Speter else if (initialpgrp != getpgrp()) { 1411556Srgrimes killpg(initialpgrp, SIGTTIN); 1421556Srgrimes continue; 1431556Srgrimes } 1441556Srgrimes } while (0); 1451556Srgrimes#ifdef OLD_TTY_DRIVER 1461556Srgrimes if (ioctl(2, TIOCGETD, (char *)&ldisc) < 0 || ldisc != NTTYDISC) { 1471556Srgrimes out2str("sh: need new tty driver to run job control; job control turned off\n"); 1481556Srgrimes mflag = 0; 1491556Srgrimes return; 1501556Srgrimes } 1511556Srgrimes#endif 1521556Srgrimes setsignal(SIGTSTP); 1531556Srgrimes setsignal(SIGTTOU); 1541556Srgrimes setsignal(SIGTTIN); 15517987Speter setpgid(0, rootpid); 15620425Ssteve#ifdef OLD_TTY_DRIVER 1571556Srgrimes ioctl(2, TIOCSPGRP, (char *)&rootpid); 15820425Ssteve#else 15920425Ssteve tcsetpgrp(2, rootpid); 16020425Ssteve#endif 1611556Srgrimes } else { /* turning job control off */ 16217987Speter setpgid(0, initialpgrp); 16320425Ssteve#ifdef OLD_TTY_DRIVER 1641556Srgrimes ioctl(2, TIOCSPGRP, (char *)&initialpgrp); 16520425Ssteve#else 16620425Ssteve tcsetpgrp(2, initialpgrp); 16720425Ssteve#endif 1681556Srgrimes setsignal(SIGTSTP); 1691556Srgrimes setsignal(SIGTTOU); 1701556Srgrimes setsignal(SIGTTIN); 1711556Srgrimes } 1721556Srgrimes jobctl = on; 1731556Srgrimes} 17420425Ssteve#endif 1751556Srgrimes 1761556Srgrimes 1771556Srgrimes#ifdef mkinit 17828346SsteveINCLUDE <sys/types.h> 17917987SpeterINCLUDE <stdlib.h> 1801556Srgrimes 1811556SrgrimesSHELLPROC { 1821556Srgrimes backgndpid = -1; 1831556Srgrimes#if JOBS 1841556Srgrimes jobctl = 0; 1851556Srgrimes#endif 1861556Srgrimes} 1871556Srgrimes 1881556Srgrimes#endif 1891556Srgrimes 1901556Srgrimes 1911556Srgrimes 1921556Srgrimes#if JOBS 19317987Speterint 19417987Speterfgcmd(argc, argv) 19525905Ssteve int argc __unused; 19620425Ssteve char **argv; 19717987Speter{ 1981556Srgrimes struct job *jp; 1991556Srgrimes int pgrp; 2001556Srgrimes int status; 2011556Srgrimes 2021556Srgrimes jp = getjob(argv[1]); 2031556Srgrimes if (jp->jobctl == 0) 2041556Srgrimes error("job not created under job control"); 2051556Srgrimes pgrp = jp->ps[0].pid; 20620425Ssteve#ifdef OLD_TTY_DRIVER 2071556Srgrimes ioctl(2, TIOCSPGRP, (char *)&pgrp); 20820425Ssteve#else 20920425Ssteve tcsetpgrp(2, pgrp); 21020425Ssteve#endif 2111556Srgrimes restartjob(jp); 2121556Srgrimes INTOFF; 2131556Srgrimes status = waitforjob(jp); 2141556Srgrimes INTON; 2151556Srgrimes return status; 2161556Srgrimes} 2171556Srgrimes 2181556Srgrimes 21917987Speterint 22017987Speterbgcmd(argc, argv) 22117987Speter int argc; 22220425Ssteve char **argv; 22317987Speter{ 2241556Srgrimes struct job *jp; 2251556Srgrimes 2261556Srgrimes do { 2271556Srgrimes jp = getjob(*++argv); 2281556Srgrimes if (jp->jobctl == 0) 2291556Srgrimes error("job not created under job control"); 2301556Srgrimes restartjob(jp); 2311556Srgrimes } while (--argc > 1); 2321556Srgrimes return 0; 2331556Srgrimes} 2341556Srgrimes 2351556Srgrimes 2361556SrgrimesSTATIC void 2371556Srgrimesrestartjob(jp) 2381556Srgrimes struct job *jp; 23917987Speter{ 2401556Srgrimes struct procstat *ps; 2411556Srgrimes int i; 2421556Srgrimes 2431556Srgrimes if (jp->state == JOBDONE) 2441556Srgrimes return; 2451556Srgrimes INTOFF; 2461556Srgrimes killpg(jp->ps[0].pid, SIGCONT); 2471556Srgrimes for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 24826104Ssteve if (WIFSTOPPED(ps->status)) { 2491556Srgrimes ps->status = -1; 2501556Srgrimes jp->state = 0; 2511556Srgrimes } 2521556Srgrimes } 2531556Srgrimes INTON; 2541556Srgrimes} 2551556Srgrimes#endif 2561556Srgrimes 2571556Srgrimes 2581556Srgrimesint 25917987Speterjobscmd(argc, argv) 26025905Ssteve int argc __unused; 26125905Ssteve char **argv __unused; 26217987Speter{ 2631556Srgrimes showjobs(0); 2641556Srgrimes return 0; 2651556Srgrimes} 2661556Srgrimes 2671556Srgrimes 2681556Srgrimes/* 2691556Srgrimes * Print a list of jobs. If "change" is nonzero, only print jobs whose 2701556Srgrimes * statuses have changed since the last call to showjobs. 2711556Srgrimes * 2721556Srgrimes * If the shell is interrupted in the process of creating a job, the 2731556Srgrimes * result may be a job structure containing zero processes. Such structures 2741556Srgrimes * will be freed here. 2751556Srgrimes */ 2761556Srgrimes 2771556Srgrimesvoid 27820425Ssteveshowjobs(change) 27917987Speter int change; 28017987Speter{ 2811556Srgrimes int jobno; 2821556Srgrimes int procno; 2831556Srgrimes int i; 2841556Srgrimes struct job *jp; 2851556Srgrimes struct procstat *ps; 2861556Srgrimes int col; 2871556Srgrimes char s[64]; 2881556Srgrimes 2891556Srgrimes TRACE(("showjobs(%d) called\n", change)); 2901556Srgrimes while (dowait(0, (struct job *)NULL) > 0); 2911556Srgrimes for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) { 2921556Srgrimes if (! jp->used) 2931556Srgrimes continue; 2941556Srgrimes if (jp->nprocs == 0) { 2951556Srgrimes freejob(jp); 2961556Srgrimes continue; 2971556Srgrimes } 2981556Srgrimes if (change && ! jp->changed) 2991556Srgrimes continue; 3001556Srgrimes procno = jp->nprocs; 3011556Srgrimes for (ps = jp->ps ; ; ps++) { /* for each process */ 3021556Srgrimes if (ps == jp->ps) 3031556Srgrimes fmtstr(s, 64, "[%d] %d ", jobno, ps->pid); 3041556Srgrimes else 3051556Srgrimes fmtstr(s, 64, " %d ", ps->pid); 3061556Srgrimes out1str(s); 3071556Srgrimes col = strlen(s); 3081556Srgrimes s[0] = '\0'; 3091556Srgrimes if (ps->status == -1) { 3101556Srgrimes /* don't print anything */ 31126104Ssteve } else if (WIFEXITED(ps->status)) { 31226104Ssteve fmtstr(s, 64, "Exit %d", WEXITSTATUS(ps->status)); 3131556Srgrimes } else { 3141556Srgrimes#if JOBS 31526104Ssteve if (WIFSTOPPED(ps->status)) 31626104Ssteve i = WSTOPSIG(ps->status); 31726104Ssteve else 3181556Srgrimes#endif 31926104Ssteve i = WTERMSIG(ps->status); 32017987Speter if ((i & 0x7F) < NSIG && sys_siglist[i & 0x7F]) 32117987Speter scopy(sys_siglist[i & 0x7F], s); 3221556Srgrimes else 3231556Srgrimes fmtstr(s, 64, "Signal %d", i & 0x7F); 32426104Ssteve if (WCOREDUMP(ps->status)) 3251556Srgrimes strcat(s, " (core dumped)"); 3261556Srgrimes } 3271556Srgrimes out1str(s); 3281556Srgrimes col += strlen(s); 3291556Srgrimes do { 3301556Srgrimes out1c(' '); 3311556Srgrimes col++; 3321556Srgrimes } while (col < 30); 3331556Srgrimes out1str(ps->cmd); 3341556Srgrimes out1c('\n'); 3351556Srgrimes if (--procno <= 0) 3361556Srgrimes break; 3371556Srgrimes } 3381556Srgrimes jp->changed = 0; 3391556Srgrimes if (jp->state == JOBDONE) { 3401556Srgrimes freejob(jp); 3411556Srgrimes } 3421556Srgrimes } 3431556Srgrimes} 3441556Srgrimes 3451556Srgrimes 3461556Srgrimes/* 3471556Srgrimes * Mark a job structure as unused. 3481556Srgrimes */ 3491556Srgrimes 3501556SrgrimesSTATIC void 3511556Srgrimesfreejob(jp) 3521556Srgrimes struct job *jp; 3531556Srgrimes { 3541556Srgrimes struct procstat *ps; 3551556Srgrimes int i; 3561556Srgrimes 3571556Srgrimes INTOFF; 3581556Srgrimes for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { 3591556Srgrimes if (ps->cmd != nullstr) 3601556Srgrimes ckfree(ps->cmd); 3611556Srgrimes } 3621556Srgrimes if (jp->ps != &jp->ps0) 3631556Srgrimes ckfree(jp->ps); 3641556Srgrimes jp->used = 0; 3651556Srgrimes#if JOBS 3661556Srgrimes if (curjob == jp - jobtab + 1) 3671556Srgrimes curjob = 0; 3681556Srgrimes#endif 3691556Srgrimes INTON; 3701556Srgrimes} 3711556Srgrimes 3721556Srgrimes 3731556Srgrimes 3741556Srgrimesint 37520425Sstevewaitcmd(argc, argv) 37617987Speter int argc; 37720425Ssteve char **argv; 37817987Speter{ 3791556Srgrimes struct job *job; 38026104Ssteve int status, retval; 3811556Srgrimes struct job *jp; 3821556Srgrimes 3831556Srgrimes if (argc > 1) { 3841556Srgrimes job = getjob(argv[1]); 3851556Srgrimes } else { 3861556Srgrimes job = NULL; 3871556Srgrimes } 3881556Srgrimes for (;;) { /* loop until process terminated or stopped */ 3891556Srgrimes if (job != NULL) { 3901556Srgrimes if (job->state) { 3911556Srgrimes status = job->ps[job->nprocs - 1].status; 39226104Ssteve if (WIFEXITED(status)) 39326104Ssteve retval = WEXITSTATUS(status); 3941556Srgrimes#if JOBS 39526104Ssteve else if (WIFSTOPPED(status)) 39626104Ssteve retval = WSTOPSIG(status) + 128; 3971556Srgrimes#endif 3981556Srgrimes else 39926104Ssteve retval = WTERMSIG(status) + 128; 4001556Srgrimes if (! iflag) 4011556Srgrimes freejob(job); 40226104Ssteve return retval; 4031556Srgrimes } 4041556Srgrimes } else { 4051556Srgrimes for (jp = jobtab ; ; jp++) { 4061556Srgrimes if (jp >= jobtab + njobs) { /* no running procs */ 4071556Srgrimes return 0; 4081556Srgrimes } 4091556Srgrimes if (jp->used && jp->state == 0) 4101556Srgrimes break; 4111556Srgrimes } 4121556Srgrimes } 4131556Srgrimes dowait(1, (struct job *)NULL); 4141556Srgrimes } 4151556Srgrimes} 4161556Srgrimes 4171556Srgrimes 4181556Srgrimes 41917987Speterint 42020425Sstevejobidcmd(argc, argv) 42125905Ssteve int argc __unused; 42220425Ssteve char **argv; 42317987Speter{ 4241556Srgrimes struct job *jp; 4251556Srgrimes int i; 4261556Srgrimes 4271556Srgrimes jp = getjob(argv[1]); 4281556Srgrimes for (i = 0 ; i < jp->nprocs ; ) { 4291556Srgrimes out1fmt("%d", jp->ps[i].pid); 4301556Srgrimes out1c(++i < jp->nprocs? ' ' : '\n'); 4311556Srgrimes } 4321556Srgrimes return 0; 4331556Srgrimes} 4341556Srgrimes 4351556Srgrimes 4361556Srgrimes 4371556Srgrimes/* 4381556Srgrimes * Convert a job name to a job structure. 4391556Srgrimes */ 4401556Srgrimes 4411556SrgrimesSTATIC struct job * 4421556Srgrimesgetjob(name) 4431556Srgrimes char *name; 4441556Srgrimes { 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 * 5021556Srgrimesmakejob(node, nprocs) 50325905Ssteve union node *node __unused; 50417987Speter int nprocs; 50517987Speter{ 5061556Srgrimes int i; 5071556Srgrimes struct job *jp; 5081556Srgrimes 5091556Srgrimes for (i = njobs, jp = jobtab ; ; jp++) { 5101556Srgrimes if (--i < 0) { 5111556Srgrimes INTOFF; 5121556Srgrimes if (njobs == 0) { 5131556Srgrimes jobtab = ckmalloc(4 * sizeof jobtab[0]); 5141556Srgrimes } else { 5151556Srgrimes jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); 51617987Speter memcpy(jp, jobtab, njobs * sizeof jp[0]); 51720425Ssteve /* Relocate `ps' pointers */ 51820425Ssteve for (i = 0; i < njobs; i++) 51920425Ssteve if (jp[i].ps == &jobtab[i].ps0) 52020425Ssteve jp[i].ps = &jp[i].ps0; 5211556Srgrimes ckfree(jobtab); 5221556Srgrimes jobtab = jp; 5231556Srgrimes } 5241556Srgrimes jp = jobtab + njobs; 5251556Srgrimes for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0); 5261556Srgrimes INTON; 5271556Srgrimes break; 5281556Srgrimes } 5291556Srgrimes if (jp->used == 0) 5301556Srgrimes break; 5311556Srgrimes } 5321556Srgrimes INTOFF; 5331556Srgrimes jp->state = 0; 5341556Srgrimes jp->used = 1; 5351556Srgrimes jp->changed = 0; 5361556Srgrimes jp->nprocs = 0; 5371556Srgrimes#if JOBS 5381556Srgrimes jp->jobctl = jobctl; 5391556Srgrimes#endif 5401556Srgrimes if (nprocs > 1) { 5411556Srgrimes jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); 5421556Srgrimes } else { 5431556Srgrimes jp->ps = &jp->ps0; 5441556Srgrimes } 5451556Srgrimes INTON; 54617987Speter TRACE(("makejob(0x%lx, %d) returns %%%d\n", (long)node, nprocs, 54717987Speter jp - jobtab + 1)); 5481556Srgrimes return jp; 5498855Srgrimes} 5501556Srgrimes 5511556Srgrimes 5521556Srgrimes/* 5531556Srgrimes * Fork of a subshell. If we are doing job control, give the subshell its 5541556Srgrimes * own process group. Jp is a job structure that the job is to be added to. 5551556Srgrimes * N is the command that will be evaluated by the child. Both jp and n may 5561556Srgrimes * be NULL. The mode parameter can be one of the following: 5571556Srgrimes * FORK_FG - Fork off a foreground process. 5581556Srgrimes * FORK_BG - Fork off a background process. 5591556Srgrimes * FORK_NOJOB - Like FORK_FG, but don't give the process its own 5601556Srgrimes * process group even if job control is on. 5611556Srgrimes * 5621556Srgrimes * When job control is turned off, background processes have their standard 5631556Srgrimes * input redirected to /dev/null (except for the second and later processes 5641556Srgrimes * in a pipeline). 5651556Srgrimes */ 5661556Srgrimes 5671556Srgrimesint 5681556Srgrimesforkshell(jp, n, mode) 5691556Srgrimes union node *n; 5701556Srgrimes struct job *jp; 57117987Speter int mode; 57217987Speter{ 5731556Srgrimes int pid; 5741556Srgrimes int pgrp; 5751556Srgrimes 57617987Speter TRACE(("forkshell(%%%d, 0x%lx, %d) called\n", jp - jobtab, (long)n, 57717987Speter mode)); 5781556Srgrimes INTOFF; 5791556Srgrimes pid = fork(); 5801556Srgrimes if (pid == -1) { 5811556Srgrimes TRACE(("Fork failed, errno=%d\n", errno)); 5821556Srgrimes INTON; 5831556Srgrimes error("Cannot fork"); 5841556Srgrimes } 5851556Srgrimes if (pid == 0) { 5861556Srgrimes struct job *p; 5871556Srgrimes int wasroot; 5881556Srgrimes int i; 5891556Srgrimes 5901556Srgrimes TRACE(("Child shell %d\n", getpid())); 5911556Srgrimes wasroot = rootshell; 5921556Srgrimes rootshell = 0; 5931556Srgrimes for (i = njobs, p = jobtab ; --i >= 0 ; p++) 5941556Srgrimes if (p->used) 5951556Srgrimes freejob(p); 5961556Srgrimes closescript(); 5971556Srgrimes INTON; 5981556Srgrimes clear_traps(); 5991556Srgrimes#if JOBS 6001556Srgrimes jobctl = 0; /* do job control only in root shell */ 6011556Srgrimes if (wasroot && mode != FORK_NOJOB && mflag) { 6021556Srgrimes if (jp == NULL || jp->nprocs == 0) 6031556Srgrimes pgrp = getpid(); 6041556Srgrimes else 6051556Srgrimes pgrp = jp->ps[0].pid; 60621352Ssteve if (setpgid(0, pgrp) == 0 && mode == FORK_FG) { 6071556Srgrimes /*** this causes superfluous TIOCSPGRPS ***/ 60820425Ssteve#ifdef OLD_TTY_DRIVER 6091556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&pgrp) < 0) 61018016Speter error("TIOCSPGRP failed, errno=%d", errno); 61120425Ssteve#else 61220425Ssteve if (tcsetpgrp(2, pgrp) < 0) 61320425Ssteve error("tcsetpgrp failed, errno=%d", errno); 61420425Ssteve#endif 6151556Srgrimes } 6161556Srgrimes setsignal(SIGTSTP); 6171556Srgrimes setsignal(SIGTTOU); 6181556Srgrimes } else if (mode == FORK_BG) { 6191556Srgrimes ignoresig(SIGINT); 6201556Srgrimes ignoresig(SIGQUIT); 6211556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 6221556Srgrimes ! fd0_redirected_p ()) { 6231556Srgrimes close(0); 6241556Srgrimes if (open("/dev/null", O_RDONLY) != 0) 6251556Srgrimes error("Can't open /dev/null"); 6261556Srgrimes } 6271556Srgrimes } 6281556Srgrimes#else 6291556Srgrimes if (mode == FORK_BG) { 6301556Srgrimes ignoresig(SIGINT); 6311556Srgrimes ignoresig(SIGQUIT); 6321556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 6331556Srgrimes ! fd0_redirected_p ()) { 6341556Srgrimes close(0); 6351556Srgrimes if (open("/dev/null", O_RDONLY) != 0) 6361556Srgrimes error("Can't open /dev/null"); 6371556Srgrimes } 6381556Srgrimes } 6391556Srgrimes#endif 6401556Srgrimes if (wasroot && iflag) { 6411556Srgrimes setsignal(SIGINT); 6421556Srgrimes setsignal(SIGQUIT); 6431556Srgrimes setsignal(SIGTERM); 6441556Srgrimes } 6451556Srgrimes return pid; 6461556Srgrimes } 6471556Srgrimes if (rootshell && mode != FORK_NOJOB && mflag) { 6481556Srgrimes if (jp == NULL || jp->nprocs == 0) 6491556Srgrimes pgrp = pid; 6501556Srgrimes else 6511556Srgrimes pgrp = jp->ps[0].pid; 65217987Speter setpgid(pid, pgrp); 6531556Srgrimes } 6541556Srgrimes if (mode == FORK_BG) 6551556Srgrimes backgndpid = pid; /* set $! */ 6561556Srgrimes if (jp) { 6571556Srgrimes struct procstat *ps = &jp->ps[jp->nprocs++]; 6581556Srgrimes ps->pid = pid; 6591556Srgrimes ps->status = -1; 6601556Srgrimes ps->cmd = nullstr; 6611556Srgrimes if (iflag && rootshell && n) 6621556Srgrimes ps->cmd = commandtext(n); 6631556Srgrimes } 6641556Srgrimes INTON; 6651556Srgrimes TRACE(("In parent shell: child = %d\n", pid)); 6661556Srgrimes return pid; 6671556Srgrimes} 6681556Srgrimes 6691556Srgrimes 6701556Srgrimes 6711556Srgrimes/* 6721556Srgrimes * Wait for job to finish. 6731556Srgrimes * 6741556Srgrimes * Under job control we have the problem that while a child process is 6751556Srgrimes * running interrupts generated by the user are sent to the child but not 6761556Srgrimes * to the shell. This means that an infinite loop started by an inter- 6771556Srgrimes * active user may be hard to kill. With job control turned off, an 6781556Srgrimes * interactive user may place an interactive program inside a loop. If 6791556Srgrimes * the interactive program catches interrupts, the user doesn't want 6801556Srgrimes * these interrupts to also abort the loop. The approach we take here 6811556Srgrimes * is to have the shell ignore interrupt signals while waiting for a 6821556Srgrimes * forground process to terminate, and then send itself an interrupt 6831556Srgrimes * signal if the child process was terminated by an interrupt signal. 6841556Srgrimes * Unfortunately, some programs want to do a bit of cleanup and then 6851556Srgrimes * exit on interrupt; unless these processes terminate themselves by 6861556Srgrimes * sending a signal to themselves (instead of calling exit) they will 6871556Srgrimes * confuse this approach. 6881556Srgrimes */ 6891556Srgrimes 6901556Srgrimesint 6911556Srgrimeswaitforjob(jp) 69225222Ssteve struct job *jp; 6931556Srgrimes { 6941556Srgrimes#if JOBS 69517987Speter int mypgrp = getpgrp(); 6961556Srgrimes#endif 6971556Srgrimes int status; 6981556Srgrimes int st; 6991556Srgrimes 7001556Srgrimes INTOFF; 7011556Srgrimes TRACE(("waitforjob(%%%d) called\n", jp - jobtab + 1)); 7021556Srgrimes while (jp->state == 0) { 7031556Srgrimes dowait(1, jp); 7041556Srgrimes } 7051556Srgrimes#if JOBS 7061556Srgrimes if (jp->jobctl) { 70720425Ssteve#ifdef OLD_TTY_DRIVER 7081556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&mypgrp) < 0) 70920425Ssteve error("TIOCSPGRP failed, errno=%d\n", errno); 71020425Ssteve#else 71120425Ssteve if (tcsetpgrp(2, mypgrp) < 0) 71220425Ssteve error("tcsetpgrp failed, errno=%d\n", errno); 71320425Ssteve#endif 7141556Srgrimes } 7151556Srgrimes if (jp->state == JOBSTOPPED) 7161556Srgrimes curjob = jp - jobtab + 1; 7171556Srgrimes#endif 7181556Srgrimes status = jp->ps[jp->nprocs - 1].status; 7191556Srgrimes /* convert to 8 bits */ 72026104Ssteve if (WIFEXITED(status)) 72126104Ssteve st = WEXITSTATUS(status); 7221556Srgrimes#if JOBS 72326104Ssteve else if (WIFSTOPPED(status)) 72426104Ssteve st = WSTOPSIG(status) + 128; 7251556Srgrimes#endif 7261556Srgrimes else 72726104Ssteve st = WTERMSIG(status) + 128; 7281556Srgrimes if (! JOBS || jp->state == JOBDONE) 7291556Srgrimes freejob(jp); 7301556Srgrimes CLEAR_PENDING_INT; 73126104Ssteve if (WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) 7321556Srgrimes kill(getpid(), SIGINT); 7331556Srgrimes INTON; 7341556Srgrimes return st; 7351556Srgrimes} 7361556Srgrimes 7371556Srgrimes 7381556Srgrimes 7391556Srgrimes/* 7401556Srgrimes * Wait for a process to terminate. 7411556Srgrimes */ 7421556Srgrimes 7431556SrgrimesSTATIC int 7441556Srgrimesdowait(block, job) 74517987Speter int block; 7461556Srgrimes struct job *job; 74717987Speter{ 7481556Srgrimes int pid; 7491556Srgrimes int status; 7501556Srgrimes struct procstat *sp; 7511556Srgrimes struct job *jp; 7521556Srgrimes struct job *thisjob; 7531556Srgrimes int done; 7541556Srgrimes int stopped; 7551556Srgrimes int core; 75626104Ssteve int sig; 7571556Srgrimes 7581556Srgrimes TRACE(("dowait(%d) called\n", block)); 7591556Srgrimes do { 7601556Srgrimes pid = waitproc(block, &status); 7611556Srgrimes TRACE(("wait returns %d, status=%d\n", pid, status)); 7621556Srgrimes } while (pid == -1 && errno == EINTR); 7631556Srgrimes if (pid <= 0) 7641556Srgrimes return pid; 7651556Srgrimes INTOFF; 7661556Srgrimes thisjob = NULL; 7671556Srgrimes for (jp = jobtab ; jp < jobtab + njobs ; jp++) { 7681556Srgrimes if (jp->used) { 7691556Srgrimes done = 1; 7701556Srgrimes stopped = 1; 7711556Srgrimes for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { 7721556Srgrimes if (sp->pid == -1) 7731556Srgrimes continue; 7741556Srgrimes if (sp->pid == pid) { 77526104Ssteve TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", 77626104Ssteve pid, sp->status, status)); 7771556Srgrimes sp->status = status; 7781556Srgrimes thisjob = jp; 7791556Srgrimes } 7801556Srgrimes if (sp->status == -1) 7811556Srgrimes stopped = 0; 78226104Ssteve else if (WIFSTOPPED(sp->status)) 7831556Srgrimes done = 0; 7841556Srgrimes } 7851556Srgrimes if (stopped) { /* stopped or done */ 7861556Srgrimes int state = done? JOBDONE : JOBSTOPPED; 7871556Srgrimes if (jp->state != state) { 7881556Srgrimes TRACE(("Job %d: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); 7891556Srgrimes jp->state = state; 7901556Srgrimes#if JOBS 7911556Srgrimes if (done && curjob == jp - jobtab + 1) 7921556Srgrimes curjob = 0; /* no current job */ 7931556Srgrimes#endif 7941556Srgrimes } 7951556Srgrimes } 7961556Srgrimes } 7971556Srgrimes } 7981556Srgrimes INTON; 7991556Srgrimes if (! rootshell || ! iflag || (job && thisjob == job)) { 80026104Ssteve core = WCOREDUMP(status); 8011556Srgrimes#if JOBS 80226104Ssteve if (WIFSTOPPED(status)) 80326104Ssteve sig = WSTOPSIG(status); 80426104Ssteve else 8051556Srgrimes#endif 80626104Ssteve if (WIFEXITED(status)) 80726104Ssteve sig = 0; 80826104Ssteve else 80926104Ssteve sig = WTERMSIG(status); 81026104Ssteve 81126104Ssteve if (sig != 0 && sig != SIGINT && sig != SIGPIPE) { 8121556Srgrimes if (thisjob != job) 8131556Srgrimes outfmt(out2, "%d: ", pid); 8141556Srgrimes#if JOBS 81526104Ssteve if (sig == SIGTSTP && rootshell && iflag) 8161556Srgrimes outfmt(out2, "%%%d ", job - jobtab + 1); 8171556Srgrimes#endif 81826104Ssteve if (sig < NSIG && sys_siglist[sig]) 81926104Ssteve out2str(sys_siglist[sig]); 8201556Srgrimes else 82126104Ssteve outfmt(out2, "Signal %d", sig); 8221556Srgrimes if (core) 8231556Srgrimes out2str(" - core dumped"); 8241556Srgrimes out2c('\n'); 8251556Srgrimes flushout(&errout); 8261556Srgrimes } else { 82726104Ssteve TRACE(("Not printing status: status=%d, sig=%d\n", 82826104Ssteve status, sig)); 8291556Srgrimes } 8301556Srgrimes } else { 8311556Srgrimes TRACE(("Not printing status, rootshell=%d, job=0x%x\n", rootshell, job)); 8321556Srgrimes if (thisjob) 8331556Srgrimes thisjob->changed = 1; 8341556Srgrimes } 8351556Srgrimes return pid; 8361556Srgrimes} 8371556Srgrimes 8381556Srgrimes 8391556Srgrimes 8401556Srgrimes/* 8411556Srgrimes * Do a wait system call. If job control is compiled in, we accept 8421556Srgrimes * stopped processes. If block is zero, we return a value of zero 8431556Srgrimes * rather than blocking. 8441556Srgrimes * 8451556Srgrimes * System V doesn't have a non-blocking wait system call. It does 8461556Srgrimes * have a SIGCLD signal that is sent to a process when one of it's 8471556Srgrimes * children dies. The obvious way to use SIGCLD would be to install 8481556Srgrimes * a handler for SIGCLD which simply bumped a counter when a SIGCLD 8491556Srgrimes * was received, and have waitproc bump another counter when it got 8501556Srgrimes * the status of a process. Waitproc would then know that a wait 8511556Srgrimes * system call would not block if the two counters were different. 8521556Srgrimes * This approach doesn't work because if a process has children that 8531556Srgrimes * have not been waited for, System V will send it a SIGCLD when it 8541556Srgrimes * installs a signal handler for SIGCLD. What this means is that when 8551556Srgrimes * a child exits, the shell will be sent SIGCLD signals continuously 8561556Srgrimes * until is runs out of stack space, unless it does a wait call before 8571556Srgrimes * restoring the signal handler. The code below takes advantage of 8581556Srgrimes * this (mis)feature by installing a signal handler for SIGCLD and 8591556Srgrimes * then checking to see whether it was called. If there are any 8601556Srgrimes * children to be waited for, it will be. 8611556Srgrimes * 8621556Srgrimes * If neither SYSV nor BSD is defined, we don't implement nonblocking 8631556Srgrimes * waits at all. In this case, the user will not be informed when 8641556Srgrimes * a background process until the next time she runs a real program 8651556Srgrimes * (as opposed to running a builtin command or just typing return), 8661556Srgrimes * and the jobs command may give out of date information. 8671556Srgrimes */ 8681556Srgrimes 8691556Srgrimes#ifdef SYSV 8701556SrgrimesSTATIC int gotsigchild; 8711556Srgrimes 8721556SrgrimesSTATIC int onsigchild() { 8731556Srgrimes gotsigchild = 1; 8741556Srgrimes} 8751556Srgrimes#endif 8761556Srgrimes 8771556Srgrimes 8781556SrgrimesSTATIC int 8791556Srgrimeswaitproc(block, status) 88017987Speter int block; 8811556Srgrimes int *status; 88217987Speter{ 8831556Srgrimes#ifdef BSD 8841556Srgrimes int flags; 8851556Srgrimes 8861556Srgrimes#if JOBS 8871556Srgrimes flags = WUNTRACED; 8881556Srgrimes#else 8891556Srgrimes flags = 0; 8901556Srgrimes#endif 8911556Srgrimes if (block == 0) 8921556Srgrimes flags |= WNOHANG; 8931556Srgrimes return wait3(status, flags, (struct rusage *)NULL); 8941556Srgrimes#else 8951556Srgrimes#ifdef SYSV 8961556Srgrimes int (*save)(); 8971556Srgrimes 8981556Srgrimes if (block == 0) { 8991556Srgrimes gotsigchild = 0; 9001556Srgrimes save = signal(SIGCLD, onsigchild); 9011556Srgrimes signal(SIGCLD, save); 9021556Srgrimes if (gotsigchild == 0) 9031556Srgrimes return 0; 9041556Srgrimes } 9051556Srgrimes return wait(status); 9061556Srgrimes#else 9071556Srgrimes if (block == 0) 9081556Srgrimes return 0; 9091556Srgrimes return wait(status); 9101556Srgrimes#endif 9111556Srgrimes#endif 9121556Srgrimes} 9131556Srgrimes 9141556Srgrimes/* 9151556Srgrimes * return 1 if there are stopped jobs, otherwise 0 9161556Srgrimes */ 9171556Srgrimesint job_warning = 0; 9181556Srgrimesint 9191556Srgrimesstoppedjobs() 9201556Srgrimes{ 92125222Ssteve int jobno; 92225222Ssteve struct job *jp; 9231556Srgrimes 9241556Srgrimes if (job_warning) 9251556Srgrimes return (0); 9261556Srgrimes for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { 9271556Srgrimes if (jp->used == 0) 9281556Srgrimes continue; 9291556Srgrimes if (jp->state == JOBSTOPPED) { 9301556Srgrimes out2str("You have stopped jobs.\n"); 9311556Srgrimes job_warning = 2; 9321556Srgrimes return (1); 9331556Srgrimes } 9341556Srgrimes } 9351556Srgrimes 9361556Srgrimes return (0); 9371556Srgrimes} 9381556Srgrimes 9391556Srgrimes/* 9401556Srgrimes * Return a string identifying a command (to be printed by the 9411556Srgrimes * jobs command. 9421556Srgrimes */ 9431556Srgrimes 9441556SrgrimesSTATIC char *cmdnextc; 9451556SrgrimesSTATIC int cmdnleft; 9461556SrgrimesSTATIC void cmdtxt(), cmdputs(); 9471556Srgrimes#define MAXCMDTEXT 200 9481556Srgrimes 9491556Srgrimeschar * 9501556Srgrimescommandtext(n) 9511556Srgrimes union node *n; 9521556Srgrimes { 9531556Srgrimes char *name; 9541556Srgrimes 9551556Srgrimes cmdnextc = name = ckmalloc(MAXCMDTEXT); 9561556Srgrimes cmdnleft = MAXCMDTEXT - 4; 9571556Srgrimes cmdtxt(n); 9581556Srgrimes *cmdnextc = '\0'; 9591556Srgrimes return name; 9601556Srgrimes} 9611556Srgrimes 9621556Srgrimes 9631556SrgrimesSTATIC void 9641556Srgrimescmdtxt(n) 9651556Srgrimes union node *n; 9661556Srgrimes { 9671556Srgrimes union node *np; 9681556Srgrimes struct nodelist *lp; 9691556Srgrimes char *p; 9701556Srgrimes int i; 9711556Srgrimes char s[2]; 9721556Srgrimes 9731556Srgrimes if (n == NULL) 9741556Srgrimes return; 9751556Srgrimes switch (n->type) { 9761556Srgrimes case NSEMI: 9771556Srgrimes cmdtxt(n->nbinary.ch1); 9781556Srgrimes cmdputs("; "); 9791556Srgrimes cmdtxt(n->nbinary.ch2); 9801556Srgrimes break; 9811556Srgrimes case NAND: 9821556Srgrimes cmdtxt(n->nbinary.ch1); 9831556Srgrimes cmdputs(" && "); 9841556Srgrimes cmdtxt(n->nbinary.ch2); 9851556Srgrimes break; 9861556Srgrimes case NOR: 9871556Srgrimes cmdtxt(n->nbinary.ch1); 9881556Srgrimes cmdputs(" || "); 9891556Srgrimes cmdtxt(n->nbinary.ch2); 9901556Srgrimes break; 9911556Srgrimes case NPIPE: 9921556Srgrimes for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 9931556Srgrimes cmdtxt(lp->n); 9941556Srgrimes if (lp->next) 9951556Srgrimes cmdputs(" | "); 9961556Srgrimes } 9971556Srgrimes break; 9981556Srgrimes case NSUBSHELL: 9991556Srgrimes cmdputs("("); 10001556Srgrimes cmdtxt(n->nredir.n); 10011556Srgrimes cmdputs(")"); 10021556Srgrimes break; 10031556Srgrimes case NREDIR: 10041556Srgrimes case NBACKGND: 10051556Srgrimes cmdtxt(n->nredir.n); 10061556Srgrimes break; 10071556Srgrimes case NIF: 10081556Srgrimes cmdputs("if "); 10091556Srgrimes cmdtxt(n->nif.test); 10101556Srgrimes cmdputs("; then "); 10111556Srgrimes cmdtxt(n->nif.ifpart); 10121556Srgrimes cmdputs("..."); 10131556Srgrimes break; 10141556Srgrimes case NWHILE: 10151556Srgrimes cmdputs("while "); 10161556Srgrimes goto until; 10171556Srgrimes case NUNTIL: 10181556Srgrimes cmdputs("until "); 10191556Srgrimesuntil: 10201556Srgrimes cmdtxt(n->nbinary.ch1); 10211556Srgrimes cmdputs("; do "); 10221556Srgrimes cmdtxt(n->nbinary.ch2); 10231556Srgrimes cmdputs("; done"); 10241556Srgrimes break; 10251556Srgrimes case NFOR: 10261556Srgrimes cmdputs("for "); 10271556Srgrimes cmdputs(n->nfor.var); 10281556Srgrimes cmdputs(" in ..."); 10291556Srgrimes break; 10301556Srgrimes case NCASE: 10311556Srgrimes cmdputs("case "); 10321556Srgrimes cmdputs(n->ncase.expr->narg.text); 10331556Srgrimes cmdputs(" in ..."); 10341556Srgrimes break; 10351556Srgrimes case NDEFUN: 10361556Srgrimes cmdputs(n->narg.text); 10371556Srgrimes cmdputs("() ..."); 10381556Srgrimes break; 10391556Srgrimes case NCMD: 10401556Srgrimes for (np = n->ncmd.args ; np ; np = np->narg.next) { 10411556Srgrimes cmdtxt(np); 10421556Srgrimes if (np->narg.next) 10431556Srgrimes cmdputs(" "); 10441556Srgrimes } 10451556Srgrimes for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { 10461556Srgrimes cmdputs(" "); 10471556Srgrimes cmdtxt(np); 10481556Srgrimes } 10491556Srgrimes break; 10501556Srgrimes case NARG: 10511556Srgrimes cmdputs(n->narg.text); 10521556Srgrimes break; 10531556Srgrimes case NTO: 10541556Srgrimes p = ">"; i = 1; goto redir; 10551556Srgrimes case NAPPEND: 10561556Srgrimes p = ">>"; i = 1; goto redir; 10571556Srgrimes case NTOFD: 10581556Srgrimes p = ">&"; i = 1; goto redir; 10591556Srgrimes case NFROM: 10601556Srgrimes p = "<"; i = 0; goto redir; 10611556Srgrimes case NFROMFD: 10621556Srgrimes p = "<&"; i = 0; goto redir; 10631556Srgrimesredir: 10641556Srgrimes if (n->nfile.fd != i) { 10651556Srgrimes s[0] = n->nfile.fd + '0'; 10661556Srgrimes s[1] = '\0'; 10671556Srgrimes cmdputs(s); 10681556Srgrimes } 10691556Srgrimes cmdputs(p); 10701556Srgrimes if (n->type == NTOFD || n->type == NFROMFD) { 10711556Srgrimes s[0] = n->ndup.dupfd + '0'; 10721556Srgrimes s[1] = '\0'; 10731556Srgrimes cmdputs(s); 10741556Srgrimes } else { 10751556Srgrimes cmdtxt(n->nfile.fname); 10761556Srgrimes } 10771556Srgrimes break; 10781556Srgrimes case NHERE: 10791556Srgrimes case NXHERE: 10801556Srgrimes cmdputs("<<..."); 10811556Srgrimes break; 10821556Srgrimes default: 10831556Srgrimes cmdputs("???"); 10841556Srgrimes break; 10851556Srgrimes } 10861556Srgrimes} 10871556Srgrimes 10881556Srgrimes 10891556Srgrimes 10901556SrgrimesSTATIC void 10911556Srgrimescmdputs(s) 10921556Srgrimes char *s; 10931556Srgrimes { 109425222Ssteve char *p, *q; 109525222Ssteve char c; 10961556Srgrimes int subtype = 0; 10971556Srgrimes 10981556Srgrimes if (cmdnleft <= 0) 10991556Srgrimes return; 11001556Srgrimes p = s; 11011556Srgrimes q = cmdnextc; 11021556Srgrimes while ((c = *p++) != '\0') { 11031556Srgrimes if (c == CTLESC) 11041556Srgrimes *q++ = *p++; 11051556Srgrimes else if (c == CTLVAR) { 11061556Srgrimes *q++ = '$'; 11071556Srgrimes if (--cmdnleft > 0) 11081556Srgrimes *q++ = '{'; 11091556Srgrimes subtype = *p++; 11101556Srgrimes } else if (c == '=' && subtype != 0) { 11111556Srgrimes *q++ = "}-+?="[(subtype & VSTYPE) - VSNORMAL]; 11121556Srgrimes subtype = 0; 11131556Srgrimes } else if (c == CTLENDVAR) { 11141556Srgrimes *q++ = '}'; 111518954Ssteve } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) 11161556Srgrimes cmdnleft++; /* ignore it */ 11171556Srgrimes else 11181556Srgrimes *q++ = c; 11191556Srgrimes if (--cmdnleft <= 0) { 11201556Srgrimes *q++ = '.'; 11211556Srgrimes *q++ = '.'; 11221556Srgrimes *q++ = '.'; 11231556Srgrimes break; 11241556Srgrimes } 11251556Srgrimes } 11261556Srgrimes cmdnextc = q; 11271556Srgrimes} 1128