jobs.c revision 97660
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 97660 2002-05-31 12:35:34Z 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 8897659Stjrstruct job *jobmru; /* most recently used job list */ 891556Srgrimesint initialpgrp; /* pgrp of shell on invocation */ 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 *); 10797659Stjr#if JOBS 10897659StjrSTATIC void setcurjob(struct job *); 10997659StjrSTATIC void deljob(struct job *); 11097659StjrSTATIC struct job *getcurjob(struct job *); 11197659Stjr#endif 1121556Srgrimes 1131556Srgrimes 1141556Srgrimes/* 1151556Srgrimes * Turn job control on and off. 1161556Srgrimes * 1171556Srgrimes * Note: This code assumes that the third arg to ioctl is a character 1181556Srgrimes * pointer, which is true on Berkeley systems but not System V. Since 1191556Srgrimes * System V doesn't have job control yet, this isn't a problem now. 1201556Srgrimes */ 1211556Srgrimes 1221556SrgrimesMKINIT int jobctl; 1231556Srgrimes 12420425Ssteve#if JOBS 1251556Srgrimesvoid 12690111Simpsetjobctl(int on) 12717987Speter{ 1281556Srgrimes#ifdef OLD_TTY_DRIVER 1291556Srgrimes int ldisc; 1301556Srgrimes#endif 1311556Srgrimes 1321556Srgrimes if (on == jobctl || rootshell == 0) 1331556Srgrimes return; 1341556Srgrimes if (on) { 1351556Srgrimes do { /* while we are in the background */ 13620425Ssteve#ifdef OLD_TTY_DRIVER 1371556Srgrimes if (ioctl(2, TIOCGPGRP, (char *)&initialpgrp) < 0) { 13820425Ssteve#else 13920425Ssteve initialpgrp = tcgetpgrp(2); 14020425Ssteve if (initialpgrp < 0) { 14120425Ssteve#endif 1421556Srgrimes out2str("sh: can't access tty; job control turned off\n"); 1431556Srgrimes mflag = 0; 1441556Srgrimes return; 1451556Srgrimes } 1461556Srgrimes if (initialpgrp == -1) 14717987Speter initialpgrp = getpgrp(); 14817987Speter else if (initialpgrp != getpgrp()) { 1491556Srgrimes killpg(initialpgrp, SIGTTIN); 1501556Srgrimes continue; 1511556Srgrimes } 1521556Srgrimes } while (0); 1531556Srgrimes#ifdef OLD_TTY_DRIVER 1541556Srgrimes if (ioctl(2, TIOCGETD, (char *)&ldisc) < 0 || ldisc != NTTYDISC) { 1551556Srgrimes out2str("sh: need new tty driver to run job control; job control turned off\n"); 1561556Srgrimes mflag = 0; 1571556Srgrimes return; 1581556Srgrimes } 1591556Srgrimes#endif 1601556Srgrimes setsignal(SIGTSTP); 1611556Srgrimes setsignal(SIGTTOU); 1621556Srgrimes setsignal(SIGTTIN); 16317987Speter setpgid(0, rootpid); 16420425Ssteve#ifdef OLD_TTY_DRIVER 1651556Srgrimes ioctl(2, TIOCSPGRP, (char *)&rootpid); 16620425Ssteve#else 16720425Ssteve tcsetpgrp(2, rootpid); 16820425Ssteve#endif 1691556Srgrimes } else { /* turning job control off */ 17017987Speter setpgid(0, initialpgrp); 17120425Ssteve#ifdef OLD_TTY_DRIVER 1721556Srgrimes ioctl(2, TIOCSPGRP, (char *)&initialpgrp); 17320425Ssteve#else 17420425Ssteve tcsetpgrp(2, initialpgrp); 17520425Ssteve#endif 1761556Srgrimes setsignal(SIGTSTP); 1771556Srgrimes setsignal(SIGTTOU); 1781556Srgrimes setsignal(SIGTTIN); 1791556Srgrimes } 1801556Srgrimes jobctl = on; 1811556Srgrimes} 18220425Ssteve#endif 1831556Srgrimes 1841556Srgrimes 1851556Srgrimes#ifdef mkinit 18628346SsteveINCLUDE <sys/types.h> 18717987SpeterINCLUDE <stdlib.h> 1881556Srgrimes 1891556SrgrimesSHELLPROC { 1901556Srgrimes backgndpid = -1; 1911556Srgrimes#if JOBS 1921556Srgrimes jobctl = 0; 1931556Srgrimes#endif 1941556Srgrimes} 1951556Srgrimes 1961556Srgrimes#endif 1971556Srgrimes 1981556Srgrimes 1991556Srgrimes 2001556Srgrimes#if JOBS 20117987Speterint 20290111Simpfgcmd(int argc __unused, char **argv) 20317987Speter{ 2041556Srgrimes struct job *jp; 2051556Srgrimes int pgrp; 2061556Srgrimes int status; 2071556Srgrimes 2081556Srgrimes jp = getjob(argv[1]); 2091556Srgrimes if (jp->jobctl == 0) 2101556Srgrimes error("job not created under job control"); 21196933Stjr out1str(jp->ps[0].cmd); 21296933Stjr out1c('\n'); 21396933Stjr flushout(&output); 2141556Srgrimes pgrp = jp->ps[0].pid; 21520425Ssteve#ifdef OLD_TTY_DRIVER 2161556Srgrimes ioctl(2, TIOCSPGRP, (char *)&pgrp); 21720425Ssteve#else 21820425Ssteve tcsetpgrp(2, pgrp); 21920425Ssteve#endif 2201556Srgrimes restartjob(jp); 2211556Srgrimes INTOFF; 22245916Scracauer status = waitforjob(jp, (int *)NULL); 2231556Srgrimes INTON; 2241556Srgrimes return status; 2251556Srgrimes} 2261556Srgrimes 2271556Srgrimes 22817987Speterint 22990111Simpbgcmd(int argc, char **argv) 23017987Speter{ 23196933Stjr char s[64]; 2321556Srgrimes struct job *jp; 2331556Srgrimes 2341556Srgrimes do { 2351556Srgrimes jp = getjob(*++argv); 2361556Srgrimes if (jp->jobctl == 0) 2371556Srgrimes error("job not created under job control"); 23896933Stjr if (jp->state == JOBDONE) 23996933Stjr continue; 2401556Srgrimes restartjob(jp); 24196933Stjr fmtstr(s, 64, "[%d] ", jp - jobtab + 1); 24296933Stjr out1str(s); 24396933Stjr out1str(jp->ps[0].cmd); 24496933Stjr out1c('\n'); 2451556Srgrimes } while (--argc > 1); 2461556Srgrimes return 0; 2471556Srgrimes} 2481556Srgrimes 2491556Srgrimes 2501556SrgrimesSTATIC void 25190111Simprestartjob(struct job *jp) 25217987Speter{ 2531556Srgrimes struct procstat *ps; 2541556Srgrimes int i; 2551556Srgrimes 2561556Srgrimes if (jp->state == JOBDONE) 2571556Srgrimes return; 25897660Stjr setcurjob(jp); 2591556Srgrimes INTOFF; 2601556Srgrimes killpg(jp->ps[0].pid, SIGCONT); 2611556Srgrimes for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 26226104Ssteve if (WIFSTOPPED(ps->status)) { 2631556Srgrimes ps->status = -1; 2641556Srgrimes jp->state = 0; 2651556Srgrimes } 2661556Srgrimes } 2671556Srgrimes INTON; 2681556Srgrimes} 2691556Srgrimes#endif 2701556Srgrimes 2711556Srgrimes 2721556Srgrimesint 27390111Simpjobscmd(int argc __unused, char **argv __unused) 27417987Speter{ 2751556Srgrimes showjobs(0); 2761556Srgrimes return 0; 2771556Srgrimes} 2781556Srgrimes 2791556Srgrimes 2801556Srgrimes/* 2811556Srgrimes * Print a list of jobs. If "change" is nonzero, only print jobs whose 2821556Srgrimes * statuses have changed since the last call to showjobs. 2831556Srgrimes * 2841556Srgrimes * If the shell is interrupted in the process of creating a job, the 2851556Srgrimes * result may be a job structure containing zero processes. Such structures 2861556Srgrimes * will be freed here. 2871556Srgrimes */ 2881556Srgrimes 2891556Srgrimesvoid 29090111Simpshowjobs(int change) 29117987Speter{ 2921556Srgrimes int jobno; 2931556Srgrimes int procno; 2941556Srgrimes int i; 2951556Srgrimes struct job *jp; 2961556Srgrimes struct procstat *ps; 2971556Srgrimes int col; 2981556Srgrimes char s[64]; 2991556Srgrimes 3001556Srgrimes TRACE(("showjobs(%d) called\n", change)); 3011556Srgrimes while (dowait(0, (struct job *)NULL) > 0); 3021556Srgrimes for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) { 3031556Srgrimes if (! jp->used) 3041556Srgrimes continue; 3051556Srgrimes if (jp->nprocs == 0) { 3061556Srgrimes freejob(jp); 3071556Srgrimes continue; 3081556Srgrimes } 3091556Srgrimes if (change && ! jp->changed) 3101556Srgrimes continue; 3111556Srgrimes procno = jp->nprocs; 3121556Srgrimes for (ps = jp->ps ; ; ps++) { /* for each process */ 3131556Srgrimes if (ps == jp->ps) 3141556Srgrimes fmtstr(s, 64, "[%d] %d ", jobno, ps->pid); 3151556Srgrimes else 3161556Srgrimes fmtstr(s, 64, " %d ", ps->pid); 3171556Srgrimes out1str(s); 3181556Srgrimes col = strlen(s); 3191556Srgrimes s[0] = '\0'; 3201556Srgrimes if (ps->status == -1) { 3211556Srgrimes /* don't print anything */ 32226104Ssteve } else if (WIFEXITED(ps->status)) { 32326104Ssteve fmtstr(s, 64, "Exit %d", WEXITSTATUS(ps->status)); 3241556Srgrimes } else { 3251556Srgrimes#if JOBS 32626104Ssteve if (WIFSTOPPED(ps->status)) 32726104Ssteve i = WSTOPSIG(ps->status); 32826104Ssteve else 3291556Srgrimes#endif 33026104Ssteve i = WTERMSIG(ps->status); 33117987Speter if ((i & 0x7F) < NSIG && sys_siglist[i & 0x7F]) 33217987Speter scopy(sys_siglist[i & 0x7F], s); 3331556Srgrimes else 3341556Srgrimes fmtstr(s, 64, "Signal %d", i & 0x7F); 33526104Ssteve if (WCOREDUMP(ps->status)) 3361556Srgrimes strcat(s, " (core dumped)"); 3371556Srgrimes } 3381556Srgrimes out1str(s); 3391556Srgrimes col += strlen(s); 3401556Srgrimes do { 3411556Srgrimes out1c(' '); 3421556Srgrimes col++; 3431556Srgrimes } while (col < 30); 3441556Srgrimes out1str(ps->cmd); 3451556Srgrimes out1c('\n'); 3461556Srgrimes if (--procno <= 0) 3471556Srgrimes break; 3481556Srgrimes } 3491556Srgrimes jp->changed = 0; 3501556Srgrimes if (jp->state == JOBDONE) { 3511556Srgrimes freejob(jp); 3521556Srgrimes } 3531556Srgrimes } 3541556Srgrimes} 3551556Srgrimes 3561556Srgrimes 3571556Srgrimes/* 3581556Srgrimes * Mark a job structure as unused. 3591556Srgrimes */ 3601556Srgrimes 3611556SrgrimesSTATIC void 36290111Simpfreejob(struct job *jp) 36390111Simp{ 3641556Srgrimes struct procstat *ps; 3651556Srgrimes int i; 3661556Srgrimes 3671556Srgrimes INTOFF; 3681556Srgrimes for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { 3691556Srgrimes if (ps->cmd != nullstr) 3701556Srgrimes ckfree(ps->cmd); 3711556Srgrimes } 3721556Srgrimes if (jp->ps != &jp->ps0) 3731556Srgrimes ckfree(jp->ps); 3741556Srgrimes jp->used = 0; 3751556Srgrimes#if JOBS 37697659Stjr deljob(jp); 3771556Srgrimes#endif 3781556Srgrimes INTON; 3791556Srgrimes} 3801556Srgrimes 3811556Srgrimes 3821556Srgrimes 3831556Srgrimesint 38490111Simpwaitcmd(int argc, char **argv) 38517987Speter{ 3861556Srgrimes struct job *job; 38726104Ssteve int status, retval; 3881556Srgrimes struct job *jp; 3891556Srgrimes 3901556Srgrimes if (argc > 1) { 3911556Srgrimes job = getjob(argv[1]); 3921556Srgrimes } else { 3931556Srgrimes job = NULL; 3941556Srgrimes } 39538536Scracauer 39638536Scracauer /* 39738536Scracauer * Loop until a process is terminated or stopped, or a SIGINT is 39838536Scracauer * received. 39938536Scracauer */ 40038536Scracauer 40138521Scracauer in_waitcmd++; 40238536Scracauer do { 4031556Srgrimes if (job != NULL) { 4041556Srgrimes if (job->state) { 4051556Srgrimes status = job->ps[job->nprocs - 1].status; 40626104Ssteve if (WIFEXITED(status)) 40726104Ssteve retval = WEXITSTATUS(status); 4081556Srgrimes#if JOBS 40926104Ssteve else if (WIFSTOPPED(status)) 41026104Ssteve retval = WSTOPSIG(status) + 128; 4111556Srgrimes#endif 4121556Srgrimes else 41326104Ssteve retval = WTERMSIG(status) + 128; 4141556Srgrimes if (! iflag) 4151556Srgrimes freejob(job); 41638536Scracauer in_waitcmd--; 41726104Ssteve return retval; 4181556Srgrimes } 4191556Srgrimes } else { 4201556Srgrimes for (jp = jobtab ; ; jp++) { 4211556Srgrimes if (jp >= jobtab + njobs) { /* no running procs */ 42238536Scracauer in_waitcmd--; 4231556Srgrimes return 0; 4241556Srgrimes } 4251556Srgrimes if (jp->used && jp->state == 0) 4261556Srgrimes break; 4271556Srgrimes } 4281556Srgrimes } 42938521Scracauer } while (dowait(1, (struct job *)NULL) != -1); 43038521Scracauer in_waitcmd--; 43138521Scracauer 43238521Scracauer return 0; 4331556Srgrimes} 4341556Srgrimes 4351556Srgrimes 4361556Srgrimes 43717987Speterint 43890111Simpjobidcmd(int argc __unused, char **argv) 43917987Speter{ 4401556Srgrimes struct job *jp; 4411556Srgrimes int i; 4421556Srgrimes 4431556Srgrimes jp = getjob(argv[1]); 4441556Srgrimes for (i = 0 ; i < jp->nprocs ; ) { 4451556Srgrimes out1fmt("%d", jp->ps[i].pid); 4461556Srgrimes out1c(++i < jp->nprocs? ' ' : '\n'); 4471556Srgrimes } 4481556Srgrimes return 0; 4491556Srgrimes} 4501556Srgrimes 4511556Srgrimes 4521556Srgrimes 4531556Srgrimes/* 4541556Srgrimes * Convert a job name to a job structure. 4551556Srgrimes */ 4561556Srgrimes 4571556SrgrimesSTATIC struct job * 45890111Simpgetjob(char *name) 45990111Simp{ 4601556Srgrimes int jobno; 46125222Ssteve struct job *jp; 4621556Srgrimes int pid; 4631556Srgrimes int i; 4641556Srgrimes 4651556Srgrimes if (name == NULL) { 4661556Srgrimes#if JOBS 46797659Stjrcurrentjob: if ((jp = getcurjob(NULL)) == NULL) 4681556Srgrimes error("No current job"); 46997659Stjr return (jp); 4701556Srgrimes#else 4711556Srgrimes error("No current job"); 4721556Srgrimes#endif 4731556Srgrimes } else if (name[0] == '%') { 4741556Srgrimes if (is_digit(name[1])) { 4751556Srgrimes jobno = number(name + 1); 4761556Srgrimes if (jobno > 0 && jobno <= njobs 4771556Srgrimes && jobtab[jobno - 1].used != 0) 4781556Srgrimes return &jobtab[jobno - 1]; 4791556Srgrimes#if JOBS 4801556Srgrimes } else if (name[1] == '%' && name[2] == '\0') { 4811556Srgrimes goto currentjob; 4821556Srgrimes#endif 4831556Srgrimes } else { 48425222Ssteve struct job *found = NULL; 4851556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 4861556Srgrimes if (jp->used && jp->nprocs > 0 4871556Srgrimes && prefix(name + 1, jp->ps[0].cmd)) { 4881556Srgrimes if (found) 4891556Srgrimes error("%s: ambiguous", name); 4901556Srgrimes found = jp; 4911556Srgrimes } 4921556Srgrimes } 4931556Srgrimes if (found) 4941556Srgrimes return found; 4951556Srgrimes } 4961556Srgrimes } else if (is_number(name)) { 4971556Srgrimes pid = number(name); 4981556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 4991556Srgrimes if (jp->used && jp->nprocs > 0 5001556Srgrimes && jp->ps[jp->nprocs - 1].pid == pid) 5011556Srgrimes return jp; 5021556Srgrimes } 5031556Srgrimes } 5041556Srgrimes error("No such job: %s", name); 50517987Speter /*NOTREACHED*/ 50617987Speter return NULL; 5071556Srgrimes} 5081556Srgrimes 5091556Srgrimes 5101556Srgrimes 5111556Srgrimes/* 5121556Srgrimes * Return a new job structure, 5131556Srgrimes */ 5141556Srgrimes 5151556Srgrimesstruct job * 51690111Simpmakejob(union node *node __unused, int nprocs) 51717987Speter{ 5181556Srgrimes int i; 5191556Srgrimes struct job *jp; 5201556Srgrimes 5211556Srgrimes for (i = njobs, jp = jobtab ; ; jp++) { 5221556Srgrimes if (--i < 0) { 5231556Srgrimes INTOFF; 5241556Srgrimes if (njobs == 0) { 5251556Srgrimes jobtab = ckmalloc(4 * sizeof jobtab[0]); 52697659Stjr jobmru = NULL; 5271556Srgrimes } else { 5281556Srgrimes jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); 52917987Speter memcpy(jp, jobtab, njobs * sizeof jp[0]); 53097659Stjr#if JOBS 53197659Stjr /* Relocate `next' pointers and list head */ 53297659Stjr jobmru = &jp[jobmru - jobtab]; 53397659Stjr for (i = 0; i < njobs; i++) 53497659Stjr if (jp[i].next != NULL) 53597659Stjr jp[i].next = &jp[jp[i].next - 53697659Stjr jobtab]; 53797659Stjr#endif 53820425Ssteve /* Relocate `ps' pointers */ 53920425Ssteve for (i = 0; i < njobs; i++) 54020425Ssteve if (jp[i].ps == &jobtab[i].ps0) 54120425Ssteve jp[i].ps = &jp[i].ps0; 5421556Srgrimes ckfree(jobtab); 5431556Srgrimes jobtab = jp; 5441556Srgrimes } 5451556Srgrimes jp = jobtab + njobs; 5461556Srgrimes for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0); 5471556Srgrimes INTON; 5481556Srgrimes break; 5491556Srgrimes } 5501556Srgrimes if (jp->used == 0) 5511556Srgrimes break; 5521556Srgrimes } 5531556Srgrimes INTOFF; 5541556Srgrimes jp->state = 0; 5551556Srgrimes jp->used = 1; 5561556Srgrimes jp->changed = 0; 5571556Srgrimes jp->nprocs = 0; 5581556Srgrimes#if JOBS 5591556Srgrimes jp->jobctl = jobctl; 56097659Stjr jp->next = NULL; 5611556Srgrimes#endif 5621556Srgrimes if (nprocs > 1) { 5631556Srgrimes jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); 5641556Srgrimes } else { 5651556Srgrimes jp->ps = &jp->ps0; 5661556Srgrimes } 5671556Srgrimes INTON; 56817987Speter TRACE(("makejob(0x%lx, %d) returns %%%d\n", (long)node, nprocs, 56917987Speter jp - jobtab + 1)); 5701556Srgrimes return jp; 5718855Srgrimes} 5721556Srgrimes 57397659Stjr#if JOBS 57497659StjrSTATIC void 57597659Stjrsetcurjob(struct job *cj) 57697659Stjr{ 57797659Stjr struct job *jp, *prev; 5781556Srgrimes 57997659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 58097659Stjr if (jp == cj) { 58197659Stjr if (prev != NULL) 58297659Stjr prev->next = jp->next; 58397659Stjr else 58497659Stjr jobmru = jp->next; 58597659Stjr jp->next = jobmru; 58697659Stjr jobmru = cj; 58797659Stjr return; 58897659Stjr } 58997659Stjr } 59097659Stjr cj->next = jobmru; 59197659Stjr jobmru = cj; 59297659Stjr} 59397659Stjr 59497659StjrSTATIC void 59597659Stjrdeljob(struct job *j) 59697659Stjr{ 59797659Stjr struct job *jp, *prev; 59897659Stjr 59997659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 60097659Stjr if (jp == j) { 60197659Stjr if (prev != NULL) 60297659Stjr prev->next = jp->next; 60397659Stjr else 60497659Stjr jobmru = jp->next; 60597659Stjr return; 60697659Stjr } 60797659Stjr } 60897659Stjr} 60997659Stjr 6101556Srgrimes/* 61197659Stjr * Return the most recently used job that isn't `nj', and preferably one 61297659Stjr * that is stopped. 61397659Stjr */ 61497659StjrSTATIC struct job * 61597659Stjrgetcurjob(struct job *nj) 61697659Stjr{ 61797659Stjr struct job *jp; 61897659Stjr 61997659Stjr /* Try to find a stopped one.. */ 62097659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 62197659Stjr if (jp->used && jp != nj && jp->state == JOBSTOPPED) 62297659Stjr return (jp); 62397659Stjr /* Otherwise the most recently used job that isn't `nj' */ 62497659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 62597659Stjr if (jp->used && jp != nj) 62697659Stjr return (jp); 62797659Stjr 62897659Stjr return (NULL); 62997659Stjr} 63097659Stjr 63197659Stjr#endif 63297659Stjr 63397659Stjr/* 6341556Srgrimes * Fork of a subshell. If we are doing job control, give the subshell its 6351556Srgrimes * own process group. Jp is a job structure that the job is to be added to. 6361556Srgrimes * N is the command that will be evaluated by the child. Both jp and n may 6371556Srgrimes * be NULL. The mode parameter can be one of the following: 6381556Srgrimes * FORK_FG - Fork off a foreground process. 6391556Srgrimes * FORK_BG - Fork off a background process. 6401556Srgrimes * FORK_NOJOB - Like FORK_FG, but don't give the process its own 6411556Srgrimes * process group even if job control is on. 6421556Srgrimes * 6431556Srgrimes * When job control is turned off, background processes have their standard 6441556Srgrimes * input redirected to /dev/null (except for the second and later processes 6451556Srgrimes * in a pipeline). 6461556Srgrimes */ 6471556Srgrimes 6481556Srgrimesint 64990111Simpforkshell(struct job *jp, union node *n, int mode) 65017987Speter{ 6511556Srgrimes int pid; 6521556Srgrimes int pgrp; 6531556Srgrimes 65417987Speter TRACE(("forkshell(%%%d, 0x%lx, %d) called\n", jp - jobtab, (long)n, 65517987Speter mode)); 6561556Srgrimes INTOFF; 6571556Srgrimes pid = fork(); 6581556Srgrimes if (pid == -1) { 6591556Srgrimes TRACE(("Fork failed, errno=%d\n", errno)); 6601556Srgrimes INTON; 66153891Scracauer error("Cannot fork: %s", strerror(errno)); 6621556Srgrimes } 6631556Srgrimes if (pid == 0) { 6641556Srgrimes struct job *p; 6651556Srgrimes int wasroot; 6661556Srgrimes int i; 6671556Srgrimes 6681556Srgrimes TRACE(("Child shell %d\n", getpid())); 6691556Srgrimes wasroot = rootshell; 6701556Srgrimes rootshell = 0; 6711556Srgrimes for (i = njobs, p = jobtab ; --i >= 0 ; p++) 6721556Srgrimes if (p->used) 6731556Srgrimes freejob(p); 6741556Srgrimes closescript(); 6751556Srgrimes INTON; 6761556Srgrimes clear_traps(); 6771556Srgrimes#if JOBS 6781556Srgrimes jobctl = 0; /* do job control only in root shell */ 6791556Srgrimes if (wasroot && mode != FORK_NOJOB && mflag) { 6801556Srgrimes if (jp == NULL || jp->nprocs == 0) 6811556Srgrimes pgrp = getpid(); 6821556Srgrimes else 6831556Srgrimes pgrp = jp->ps[0].pid; 68421352Ssteve if (setpgid(0, pgrp) == 0 && mode == FORK_FG) { 6851556Srgrimes /*** this causes superfluous TIOCSPGRPS ***/ 68620425Ssteve#ifdef OLD_TTY_DRIVER 6871556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&pgrp) < 0) 68818016Speter error("TIOCSPGRP failed, errno=%d", errno); 68920425Ssteve#else 69020425Ssteve if (tcsetpgrp(2, pgrp) < 0) 69120425Ssteve error("tcsetpgrp failed, errno=%d", errno); 69220425Ssteve#endif 6931556Srgrimes } 6941556Srgrimes setsignal(SIGTSTP); 6951556Srgrimes setsignal(SIGTTOU); 6961556Srgrimes } else if (mode == FORK_BG) { 6971556Srgrimes ignoresig(SIGINT); 6981556Srgrimes ignoresig(SIGQUIT); 6991556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 7001556Srgrimes ! fd0_redirected_p ()) { 7011556Srgrimes close(0); 70269793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 70369793Sobrien error("Can't open %s: %s", 70469793Sobrien _PATH_DEVNULL, strerror(errno)); 7051556Srgrimes } 7061556Srgrimes } 7071556Srgrimes#else 7081556Srgrimes if (mode == FORK_BG) { 7091556Srgrimes ignoresig(SIGINT); 7101556Srgrimes ignoresig(SIGQUIT); 7111556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 7121556Srgrimes ! fd0_redirected_p ()) { 7131556Srgrimes close(0); 71469793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 71569793Sobrien error("Can't open %s: %s", 71669793Sobrien _PATH_DEVNULL, strerror(errno)); 7171556Srgrimes } 7181556Srgrimes } 7191556Srgrimes#endif 7201556Srgrimes if (wasroot && iflag) { 7211556Srgrimes setsignal(SIGINT); 7221556Srgrimes setsignal(SIGQUIT); 7231556Srgrimes setsignal(SIGTERM); 7241556Srgrimes } 7251556Srgrimes return pid; 7261556Srgrimes } 7271556Srgrimes if (rootshell && mode != FORK_NOJOB && mflag) { 7281556Srgrimes if (jp == NULL || jp->nprocs == 0) 7291556Srgrimes pgrp = pid; 7301556Srgrimes else 7311556Srgrimes pgrp = jp->ps[0].pid; 73217987Speter setpgid(pid, pgrp); 7331556Srgrimes } 7341556Srgrimes if (mode == FORK_BG) 7351556Srgrimes backgndpid = pid; /* set $! */ 7361556Srgrimes if (jp) { 7371556Srgrimes struct procstat *ps = &jp->ps[jp->nprocs++]; 7381556Srgrimes ps->pid = pid; 7391556Srgrimes ps->status = -1; 7401556Srgrimes ps->cmd = nullstr; 7411556Srgrimes if (iflag && rootshell && n) 7421556Srgrimes ps->cmd = commandtext(n); 74397659Stjr#if JOBS 74497659Stjr setcurjob(jp); 74597659Stjr#endif 7461556Srgrimes } 7471556Srgrimes INTON; 7481556Srgrimes TRACE(("In parent shell: child = %d\n", pid)); 7491556Srgrimes return pid; 7501556Srgrimes} 7511556Srgrimes 7521556Srgrimes 7531556Srgrimes 7541556Srgrimes/* 7551556Srgrimes * Wait for job to finish. 7561556Srgrimes * 7571556Srgrimes * Under job control we have the problem that while a child process is 7581556Srgrimes * running interrupts generated by the user are sent to the child but not 7591556Srgrimes * to the shell. This means that an infinite loop started by an inter- 7601556Srgrimes * active user may be hard to kill. With job control turned off, an 7611556Srgrimes * interactive user may place an interactive program inside a loop. If 7621556Srgrimes * the interactive program catches interrupts, the user doesn't want 7631556Srgrimes * these interrupts to also abort the loop. The approach we take here 7641556Srgrimes * is to have the shell ignore interrupt signals while waiting for a 76546684Skris * foreground process to terminate, and then send itself an interrupt 7661556Srgrimes * signal if the child process was terminated by an interrupt signal. 7671556Srgrimes * Unfortunately, some programs want to do a bit of cleanup and then 7681556Srgrimes * exit on interrupt; unless these processes terminate themselves by 7691556Srgrimes * sending a signal to themselves (instead of calling exit) they will 7701556Srgrimes * confuse this approach. 7711556Srgrimes */ 7721556Srgrimes 7731556Srgrimesint 77490111Simpwaitforjob(struct job *jp, int *origstatus) 77545916Scracauer{ 7761556Srgrimes#if JOBS 77717987Speter int mypgrp = getpgrp(); 7781556Srgrimes#endif 7791556Srgrimes int status; 7801556Srgrimes int st; 7811556Srgrimes 7821556Srgrimes INTOFF; 7831556Srgrimes TRACE(("waitforjob(%%%d) called\n", jp - jobtab + 1)); 78438950Scracauer while (jp->state == 0) 78538950Scracauer if (dowait(1, jp) == -1) 78638950Scracauer dotrap(); 7871556Srgrimes#if JOBS 7881556Srgrimes if (jp->jobctl) { 78920425Ssteve#ifdef OLD_TTY_DRIVER 7901556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&mypgrp) < 0) 79120425Ssteve error("TIOCSPGRP failed, errno=%d\n", errno); 79220425Ssteve#else 79320425Ssteve if (tcsetpgrp(2, mypgrp) < 0) 79420425Ssteve error("tcsetpgrp failed, errno=%d\n", errno); 79520425Ssteve#endif 7961556Srgrimes } 7971556Srgrimes if (jp->state == JOBSTOPPED) 79897659Stjr setcurjob(jp); 7991556Srgrimes#endif 8001556Srgrimes status = jp->ps[jp->nprocs - 1].status; 80145916Scracauer if (origstatus != NULL) 80245916Scracauer *origstatus = status; 8031556Srgrimes /* convert to 8 bits */ 80426104Ssteve if (WIFEXITED(status)) 80526104Ssteve st = WEXITSTATUS(status); 8061556Srgrimes#if JOBS 80726104Ssteve else if (WIFSTOPPED(status)) 80826104Ssteve st = WSTOPSIG(status) + 128; 8091556Srgrimes#endif 8101556Srgrimes else 81126104Ssteve st = WTERMSIG(status) + 128; 8121556Srgrimes if (! JOBS || jp->state == JOBDONE) 8131556Srgrimes freejob(jp); 81438521Scracauer if (int_pending()) { 81538521Scracauer if (WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) 81638521Scracauer kill(getpid(), SIGINT); 81738521Scracauer else 81838521Scracauer CLEAR_PENDING_INT; 81938521Scracauer } 8201556Srgrimes INTON; 8211556Srgrimes return st; 8221556Srgrimes} 8231556Srgrimes 8241556Srgrimes 8251556Srgrimes 8261556Srgrimes/* 8271556Srgrimes * Wait for a process to terminate. 8281556Srgrimes */ 8291556Srgrimes 8301556SrgrimesSTATIC int 83190111Simpdowait(int block, struct job *job) 83217987Speter{ 8331556Srgrimes int pid; 8341556Srgrimes int status; 8351556Srgrimes struct procstat *sp; 8361556Srgrimes struct job *jp; 8371556Srgrimes struct job *thisjob; 8381556Srgrimes int done; 8391556Srgrimes int stopped; 8401556Srgrimes int core; 84126104Ssteve int sig; 8421556Srgrimes 84338950Scracauer in_dowait++; 8441556Srgrimes TRACE(("dowait(%d) called\n", block)); 8451556Srgrimes do { 8461556Srgrimes pid = waitproc(block, &status); 8471556Srgrimes TRACE(("wait returns %d, status=%d\n", pid, status)); 84872086Scracauer } while ((pid == -1 && errno == EINTR && breakwaitcmd == 0) || 84972086Scracauer (WIFSTOPPED(status) && !iflag)); 85038950Scracauer in_dowait--; 85138521Scracauer if (breakwaitcmd != 0) { 85238521Scracauer breakwaitcmd = 0; 85338521Scracauer return -1; 85438521Scracauer } 8551556Srgrimes if (pid <= 0) 8561556Srgrimes return pid; 8571556Srgrimes INTOFF; 8581556Srgrimes thisjob = NULL; 8591556Srgrimes for (jp = jobtab ; jp < jobtab + njobs ; jp++) { 8601556Srgrimes if (jp->used) { 8611556Srgrimes done = 1; 8621556Srgrimes stopped = 1; 8631556Srgrimes for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { 8641556Srgrimes if (sp->pid == -1) 8651556Srgrimes continue; 8661556Srgrimes if (sp->pid == pid) { 86726104Ssteve TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", 86826104Ssteve pid, sp->status, status)); 8691556Srgrimes sp->status = status; 8701556Srgrimes thisjob = jp; 8711556Srgrimes } 8721556Srgrimes if (sp->status == -1) 8731556Srgrimes stopped = 0; 87426104Ssteve else if (WIFSTOPPED(sp->status)) 8751556Srgrimes done = 0; 8761556Srgrimes } 8771556Srgrimes if (stopped) { /* stopped or done */ 8781556Srgrimes int state = done? JOBDONE : JOBSTOPPED; 8791556Srgrimes if (jp->state != state) { 8801556Srgrimes TRACE(("Job %d: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); 8811556Srgrimes jp->state = state; 8821556Srgrimes#if JOBS 88397659Stjr if (done) 88497659Stjr deljob(jp); 8851556Srgrimes#endif 8861556Srgrimes } 8871556Srgrimes } 8881556Srgrimes } 8891556Srgrimes } 8901556Srgrimes INTON; 8911556Srgrimes if (! rootshell || ! iflag || (job && thisjob == job)) { 89226104Ssteve core = WCOREDUMP(status); 8931556Srgrimes#if JOBS 89426104Ssteve if (WIFSTOPPED(status)) 89526104Ssteve sig = WSTOPSIG(status); 89626104Ssteve else 8971556Srgrimes#endif 89826104Ssteve if (WIFEXITED(status)) 89926104Ssteve sig = 0; 90026104Ssteve else 90126104Ssteve sig = WTERMSIG(status); 90226104Ssteve 90326104Ssteve if (sig != 0 && sig != SIGINT && sig != SIGPIPE) { 9041556Srgrimes if (thisjob != job) 9051556Srgrimes outfmt(out2, "%d: ", pid); 9061556Srgrimes#if JOBS 90726104Ssteve if (sig == SIGTSTP && rootshell && iflag) 9081556Srgrimes outfmt(out2, "%%%d ", job - jobtab + 1); 9091556Srgrimes#endif 91026104Ssteve if (sig < NSIG && sys_siglist[sig]) 91126104Ssteve out2str(sys_siglist[sig]); 9121556Srgrimes else 91326104Ssteve outfmt(out2, "Signal %d", sig); 9141556Srgrimes if (core) 9151556Srgrimes out2str(" - core dumped"); 9161556Srgrimes out2c('\n'); 9171556Srgrimes flushout(&errout); 9181556Srgrimes } else { 91926104Ssteve TRACE(("Not printing status: status=%d, sig=%d\n", 92026104Ssteve status, sig)); 9211556Srgrimes } 9221556Srgrimes } else { 9231556Srgrimes TRACE(("Not printing status, rootshell=%d, job=0x%x\n", rootshell, job)); 9241556Srgrimes if (thisjob) 9251556Srgrimes thisjob->changed = 1; 9261556Srgrimes } 9271556Srgrimes return pid; 9281556Srgrimes} 9291556Srgrimes 9301556Srgrimes 9311556Srgrimes 9321556Srgrimes/* 9331556Srgrimes * Do a wait system call. If job control is compiled in, we accept 9341556Srgrimes * stopped processes. If block is zero, we return a value of zero 9351556Srgrimes * rather than blocking. 9361556Srgrimes * 9371556Srgrimes * System V doesn't have a non-blocking wait system call. It does 9381556Srgrimes * have a SIGCLD signal that is sent to a process when one of it's 9391556Srgrimes * children dies. The obvious way to use SIGCLD would be to install 9401556Srgrimes * a handler for SIGCLD which simply bumped a counter when a SIGCLD 9411556Srgrimes * was received, and have waitproc bump another counter when it got 9421556Srgrimes * the status of a process. Waitproc would then know that a wait 9431556Srgrimes * system call would not block if the two counters were different. 9441556Srgrimes * This approach doesn't work because if a process has children that 9451556Srgrimes * have not been waited for, System V will send it a SIGCLD when it 9461556Srgrimes * installs a signal handler for SIGCLD. What this means is that when 9471556Srgrimes * a child exits, the shell will be sent SIGCLD signals continuously 9481556Srgrimes * until is runs out of stack space, unless it does a wait call before 9491556Srgrimes * restoring the signal handler. The code below takes advantage of 9501556Srgrimes * this (mis)feature by installing a signal handler for SIGCLD and 9511556Srgrimes * then checking to see whether it was called. If there are any 9521556Srgrimes * children to be waited for, it will be. 9531556Srgrimes * 9541556Srgrimes * If neither SYSV nor BSD is defined, we don't implement nonblocking 9551556Srgrimes * waits at all. In this case, the user will not be informed when 9561556Srgrimes * a background process until the next time she runs a real program 9571556Srgrimes * (as opposed to running a builtin command or just typing return), 9581556Srgrimes * and the jobs command may give out of date information. 9591556Srgrimes */ 9601556Srgrimes 9611556Srgrimes#ifdef SYSV 96238521ScracauerSTATIC sig_atomic_t gotsigchild; 9631556Srgrimes 9641556SrgrimesSTATIC int onsigchild() { 9651556Srgrimes gotsigchild = 1; 9661556Srgrimes} 9671556Srgrimes#endif 9681556Srgrimes 9691556Srgrimes 9701556SrgrimesSTATIC int 97190111Simpwaitproc(int block, int *status) 97217987Speter{ 9731556Srgrimes#ifdef BSD 9741556Srgrimes int flags; 9751556Srgrimes 9761556Srgrimes#if JOBS 9771556Srgrimes flags = WUNTRACED; 9781556Srgrimes#else 9791556Srgrimes flags = 0; 9801556Srgrimes#endif 9811556Srgrimes if (block == 0) 9821556Srgrimes flags |= WNOHANG; 9831556Srgrimes return wait3(status, flags, (struct rusage *)NULL); 9841556Srgrimes#else 9851556Srgrimes#ifdef SYSV 9861556Srgrimes int (*save)(); 9871556Srgrimes 9881556Srgrimes if (block == 0) { 9891556Srgrimes gotsigchild = 0; 9901556Srgrimes save = signal(SIGCLD, onsigchild); 9911556Srgrimes signal(SIGCLD, save); 9921556Srgrimes if (gotsigchild == 0) 9931556Srgrimes return 0; 9941556Srgrimes } 9951556Srgrimes return wait(status); 9961556Srgrimes#else 9971556Srgrimes if (block == 0) 9981556Srgrimes return 0; 9991556Srgrimes return wait(status); 10001556Srgrimes#endif 10011556Srgrimes#endif 10021556Srgrimes} 10031556Srgrimes 10041556Srgrimes/* 10051556Srgrimes * return 1 if there are stopped jobs, otherwise 0 10061556Srgrimes */ 10071556Srgrimesint job_warning = 0; 10081556Srgrimesint 100990111Simpstoppedjobs(void) 10101556Srgrimes{ 101125222Ssteve int jobno; 101225222Ssteve struct job *jp; 10131556Srgrimes 10141556Srgrimes if (job_warning) 10151556Srgrimes return (0); 10161556Srgrimes for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { 10171556Srgrimes if (jp->used == 0) 10181556Srgrimes continue; 10191556Srgrimes if (jp->state == JOBSTOPPED) { 10201556Srgrimes out2str("You have stopped jobs.\n"); 10211556Srgrimes job_warning = 2; 10221556Srgrimes return (1); 10231556Srgrimes } 10241556Srgrimes } 10251556Srgrimes 10261556Srgrimes return (0); 10271556Srgrimes} 10281556Srgrimes 10291556Srgrimes/* 10301556Srgrimes * Return a string identifying a command (to be printed by the 10311556Srgrimes * jobs command. 10321556Srgrimes */ 10331556Srgrimes 10341556SrgrimesSTATIC char *cmdnextc; 10351556SrgrimesSTATIC int cmdnleft; 10361556Srgrimes#define MAXCMDTEXT 200 10371556Srgrimes 10381556Srgrimeschar * 103990111Simpcommandtext(union node *n) 104090111Simp{ 10411556Srgrimes char *name; 10421556Srgrimes 10431556Srgrimes cmdnextc = name = ckmalloc(MAXCMDTEXT); 10441556Srgrimes cmdnleft = MAXCMDTEXT - 4; 10451556Srgrimes cmdtxt(n); 10461556Srgrimes *cmdnextc = '\0'; 10471556Srgrimes return name; 10481556Srgrimes} 10491556Srgrimes 10501556Srgrimes 10511556SrgrimesSTATIC void 105290111Simpcmdtxt(union node *n) 105390111Simp{ 10541556Srgrimes union node *np; 10551556Srgrimes struct nodelist *lp; 10561556Srgrimes char *p; 10571556Srgrimes int i; 10581556Srgrimes char s[2]; 10591556Srgrimes 10601556Srgrimes if (n == NULL) 10611556Srgrimes return; 10621556Srgrimes switch (n->type) { 10631556Srgrimes case NSEMI: 10641556Srgrimes cmdtxt(n->nbinary.ch1); 10651556Srgrimes cmdputs("; "); 10661556Srgrimes cmdtxt(n->nbinary.ch2); 10671556Srgrimes break; 10681556Srgrimes case NAND: 10691556Srgrimes cmdtxt(n->nbinary.ch1); 10701556Srgrimes cmdputs(" && "); 10711556Srgrimes cmdtxt(n->nbinary.ch2); 10721556Srgrimes break; 10731556Srgrimes case NOR: 10741556Srgrimes cmdtxt(n->nbinary.ch1); 10751556Srgrimes cmdputs(" || "); 10761556Srgrimes cmdtxt(n->nbinary.ch2); 10771556Srgrimes break; 10781556Srgrimes case NPIPE: 10791556Srgrimes for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 10801556Srgrimes cmdtxt(lp->n); 10811556Srgrimes if (lp->next) 10821556Srgrimes cmdputs(" | "); 10831556Srgrimes } 10841556Srgrimes break; 10851556Srgrimes case NSUBSHELL: 10861556Srgrimes cmdputs("("); 10871556Srgrimes cmdtxt(n->nredir.n); 10881556Srgrimes cmdputs(")"); 10891556Srgrimes break; 10901556Srgrimes case NREDIR: 10911556Srgrimes case NBACKGND: 10921556Srgrimes cmdtxt(n->nredir.n); 10931556Srgrimes break; 10941556Srgrimes case NIF: 10951556Srgrimes cmdputs("if "); 10961556Srgrimes cmdtxt(n->nif.test); 10971556Srgrimes cmdputs("; then "); 10981556Srgrimes cmdtxt(n->nif.ifpart); 10991556Srgrimes cmdputs("..."); 11001556Srgrimes break; 11011556Srgrimes case NWHILE: 11021556Srgrimes cmdputs("while "); 11031556Srgrimes goto until; 11041556Srgrimes case NUNTIL: 11051556Srgrimes cmdputs("until "); 11061556Srgrimesuntil: 11071556Srgrimes cmdtxt(n->nbinary.ch1); 11081556Srgrimes cmdputs("; do "); 11091556Srgrimes cmdtxt(n->nbinary.ch2); 11101556Srgrimes cmdputs("; done"); 11111556Srgrimes break; 11121556Srgrimes case NFOR: 11131556Srgrimes cmdputs("for "); 11141556Srgrimes cmdputs(n->nfor.var); 11151556Srgrimes cmdputs(" in ..."); 11161556Srgrimes break; 11171556Srgrimes case NCASE: 11181556Srgrimes cmdputs("case "); 11191556Srgrimes cmdputs(n->ncase.expr->narg.text); 11201556Srgrimes cmdputs(" in ..."); 11211556Srgrimes break; 11221556Srgrimes case NDEFUN: 11231556Srgrimes cmdputs(n->narg.text); 11241556Srgrimes cmdputs("() ..."); 11251556Srgrimes break; 11261556Srgrimes case NCMD: 11271556Srgrimes for (np = n->ncmd.args ; np ; np = np->narg.next) { 11281556Srgrimes cmdtxt(np); 11291556Srgrimes if (np->narg.next) 11301556Srgrimes cmdputs(" "); 11311556Srgrimes } 11321556Srgrimes for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { 11331556Srgrimes cmdputs(" "); 11341556Srgrimes cmdtxt(np); 11351556Srgrimes } 11361556Srgrimes break; 11371556Srgrimes case NARG: 11381556Srgrimes cmdputs(n->narg.text); 11391556Srgrimes break; 11401556Srgrimes case NTO: 11411556Srgrimes p = ">"; i = 1; goto redir; 11421556Srgrimes case NAPPEND: 11431556Srgrimes p = ">>"; i = 1; goto redir; 11441556Srgrimes case NTOFD: 11451556Srgrimes p = ">&"; i = 1; goto redir; 114696922Stjr case NCLOBBER: 114796922Stjr p = ">|"; i = 1; goto redir; 11481556Srgrimes case NFROM: 11491556Srgrimes p = "<"; i = 0; goto redir; 115066612Sbrian case NFROMTO: 115166612Sbrian p = "<>"; i = 0; goto redir; 11521556Srgrimes case NFROMFD: 11531556Srgrimes p = "<&"; i = 0; goto redir; 11541556Srgrimesredir: 11551556Srgrimes if (n->nfile.fd != i) { 11561556Srgrimes s[0] = n->nfile.fd + '0'; 11571556Srgrimes s[1] = '\0'; 11581556Srgrimes cmdputs(s); 11591556Srgrimes } 11601556Srgrimes cmdputs(p); 11611556Srgrimes if (n->type == NTOFD || n->type == NFROMFD) { 11621556Srgrimes s[0] = n->ndup.dupfd + '0'; 11631556Srgrimes s[1] = '\0'; 11641556Srgrimes cmdputs(s); 11651556Srgrimes } else { 11661556Srgrimes cmdtxt(n->nfile.fname); 11671556Srgrimes } 11681556Srgrimes break; 11691556Srgrimes case NHERE: 11701556Srgrimes case NXHERE: 11711556Srgrimes cmdputs("<<..."); 11721556Srgrimes break; 11731556Srgrimes default: 11741556Srgrimes cmdputs("???"); 11751556Srgrimes break; 11761556Srgrimes } 11771556Srgrimes} 11781556Srgrimes 11791556Srgrimes 11801556Srgrimes 11811556SrgrimesSTATIC void 118290111Simpcmdputs(char *s) 118390111Simp{ 118425222Ssteve char *p, *q; 118525222Ssteve char c; 11861556Srgrimes int subtype = 0; 11871556Srgrimes 11881556Srgrimes if (cmdnleft <= 0) 11891556Srgrimes return; 11901556Srgrimes p = s; 11911556Srgrimes q = cmdnextc; 11921556Srgrimes while ((c = *p++) != '\0') { 11931556Srgrimes if (c == CTLESC) 11941556Srgrimes *q++ = *p++; 11951556Srgrimes else if (c == CTLVAR) { 11961556Srgrimes *q++ = '$'; 11971556Srgrimes if (--cmdnleft > 0) 11981556Srgrimes *q++ = '{'; 11991556Srgrimes subtype = *p++; 12001556Srgrimes } else if (c == '=' && subtype != 0) { 12011556Srgrimes *q++ = "}-+?="[(subtype & VSTYPE) - VSNORMAL]; 12021556Srgrimes subtype = 0; 12031556Srgrimes } else if (c == CTLENDVAR) { 12041556Srgrimes *q++ = '}'; 120518954Ssteve } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) 12061556Srgrimes cmdnleft++; /* ignore it */ 12071556Srgrimes else 12081556Srgrimes *q++ = c; 12091556Srgrimes if (--cmdnleft <= 0) { 12101556Srgrimes *q++ = '.'; 12111556Srgrimes *q++ = '.'; 12121556Srgrimes *q++ = '.'; 12131556Srgrimes break; 12141556Srgrimes } 12151556Srgrimes } 12161556Srgrimes cmdnextc = q; 12171556Srgrimes} 1218