jobs.c revision 97659
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 97659 2002-05-31 12:31:23Z 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; 2581556Srgrimes INTOFF; 2591556Srgrimes killpg(jp->ps[0].pid, SIGCONT); 2601556Srgrimes for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 26126104Ssteve if (WIFSTOPPED(ps->status)) { 2621556Srgrimes ps->status = -1; 2631556Srgrimes jp->state = 0; 2641556Srgrimes } 2651556Srgrimes } 2661556Srgrimes INTON; 2671556Srgrimes} 2681556Srgrimes#endif 2691556Srgrimes 2701556Srgrimes 2711556Srgrimesint 27290111Simpjobscmd(int argc __unused, char **argv __unused) 27317987Speter{ 2741556Srgrimes showjobs(0); 2751556Srgrimes return 0; 2761556Srgrimes} 2771556Srgrimes 2781556Srgrimes 2791556Srgrimes/* 2801556Srgrimes * Print a list of jobs. If "change" is nonzero, only print jobs whose 2811556Srgrimes * statuses have changed since the last call to showjobs. 2821556Srgrimes * 2831556Srgrimes * If the shell is interrupted in the process of creating a job, the 2841556Srgrimes * result may be a job structure containing zero processes. Such structures 2851556Srgrimes * will be freed here. 2861556Srgrimes */ 2871556Srgrimes 2881556Srgrimesvoid 28990111Simpshowjobs(int change) 29017987Speter{ 2911556Srgrimes int jobno; 2921556Srgrimes int procno; 2931556Srgrimes int i; 2941556Srgrimes struct job *jp; 2951556Srgrimes struct procstat *ps; 2961556Srgrimes int col; 2971556Srgrimes char s[64]; 2981556Srgrimes 2991556Srgrimes TRACE(("showjobs(%d) called\n", change)); 3001556Srgrimes while (dowait(0, (struct job *)NULL) > 0); 3011556Srgrimes for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) { 3021556Srgrimes if (! jp->used) 3031556Srgrimes continue; 3041556Srgrimes if (jp->nprocs == 0) { 3051556Srgrimes freejob(jp); 3061556Srgrimes continue; 3071556Srgrimes } 3081556Srgrimes if (change && ! jp->changed) 3091556Srgrimes continue; 3101556Srgrimes procno = jp->nprocs; 3111556Srgrimes for (ps = jp->ps ; ; ps++) { /* for each process */ 3121556Srgrimes if (ps == jp->ps) 3131556Srgrimes fmtstr(s, 64, "[%d] %d ", jobno, ps->pid); 3141556Srgrimes else 3151556Srgrimes fmtstr(s, 64, " %d ", ps->pid); 3161556Srgrimes out1str(s); 3171556Srgrimes col = strlen(s); 3181556Srgrimes s[0] = '\0'; 3191556Srgrimes if (ps->status == -1) { 3201556Srgrimes /* don't print anything */ 32126104Ssteve } else if (WIFEXITED(ps->status)) { 32226104Ssteve fmtstr(s, 64, "Exit %d", WEXITSTATUS(ps->status)); 3231556Srgrimes } else { 3241556Srgrimes#if JOBS 32526104Ssteve if (WIFSTOPPED(ps->status)) 32626104Ssteve i = WSTOPSIG(ps->status); 32726104Ssteve else 3281556Srgrimes#endif 32926104Ssteve i = WTERMSIG(ps->status); 33017987Speter if ((i & 0x7F) < NSIG && sys_siglist[i & 0x7F]) 33117987Speter scopy(sys_siglist[i & 0x7F], s); 3321556Srgrimes else 3331556Srgrimes fmtstr(s, 64, "Signal %d", i & 0x7F); 33426104Ssteve if (WCOREDUMP(ps->status)) 3351556Srgrimes strcat(s, " (core dumped)"); 3361556Srgrimes } 3371556Srgrimes out1str(s); 3381556Srgrimes col += strlen(s); 3391556Srgrimes do { 3401556Srgrimes out1c(' '); 3411556Srgrimes col++; 3421556Srgrimes } while (col < 30); 3431556Srgrimes out1str(ps->cmd); 3441556Srgrimes out1c('\n'); 3451556Srgrimes if (--procno <= 0) 3461556Srgrimes break; 3471556Srgrimes } 3481556Srgrimes jp->changed = 0; 3491556Srgrimes if (jp->state == JOBDONE) { 3501556Srgrimes freejob(jp); 3511556Srgrimes } 3521556Srgrimes } 3531556Srgrimes} 3541556Srgrimes 3551556Srgrimes 3561556Srgrimes/* 3571556Srgrimes * Mark a job structure as unused. 3581556Srgrimes */ 3591556Srgrimes 3601556SrgrimesSTATIC void 36190111Simpfreejob(struct job *jp) 36290111Simp{ 3631556Srgrimes struct procstat *ps; 3641556Srgrimes int i; 3651556Srgrimes 3661556Srgrimes INTOFF; 3671556Srgrimes for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { 3681556Srgrimes if (ps->cmd != nullstr) 3691556Srgrimes ckfree(ps->cmd); 3701556Srgrimes } 3711556Srgrimes if (jp->ps != &jp->ps0) 3721556Srgrimes ckfree(jp->ps); 3731556Srgrimes jp->used = 0; 3741556Srgrimes#if JOBS 37597659Stjr deljob(jp); 3761556Srgrimes#endif 3771556Srgrimes INTON; 3781556Srgrimes} 3791556Srgrimes 3801556Srgrimes 3811556Srgrimes 3821556Srgrimesint 38390111Simpwaitcmd(int argc, char **argv) 38417987Speter{ 3851556Srgrimes struct job *job; 38626104Ssteve int status, retval; 3871556Srgrimes struct job *jp; 3881556Srgrimes 3891556Srgrimes if (argc > 1) { 3901556Srgrimes job = getjob(argv[1]); 3911556Srgrimes } else { 3921556Srgrimes job = NULL; 3931556Srgrimes } 39438536Scracauer 39538536Scracauer /* 39638536Scracauer * Loop until a process is terminated or stopped, or a SIGINT is 39738536Scracauer * received. 39838536Scracauer */ 39938536Scracauer 40038521Scracauer in_waitcmd++; 40138536Scracauer do { 4021556Srgrimes if (job != NULL) { 4031556Srgrimes if (job->state) { 4041556Srgrimes status = job->ps[job->nprocs - 1].status; 40526104Ssteve if (WIFEXITED(status)) 40626104Ssteve retval = WEXITSTATUS(status); 4071556Srgrimes#if JOBS 40826104Ssteve else if (WIFSTOPPED(status)) 40926104Ssteve retval = WSTOPSIG(status) + 128; 4101556Srgrimes#endif 4111556Srgrimes else 41226104Ssteve retval = WTERMSIG(status) + 128; 4131556Srgrimes if (! iflag) 4141556Srgrimes freejob(job); 41538536Scracauer in_waitcmd--; 41626104Ssteve return retval; 4171556Srgrimes } 4181556Srgrimes } else { 4191556Srgrimes for (jp = jobtab ; ; jp++) { 4201556Srgrimes if (jp >= jobtab + njobs) { /* no running procs */ 42138536Scracauer in_waitcmd--; 4221556Srgrimes return 0; 4231556Srgrimes } 4241556Srgrimes if (jp->used && jp->state == 0) 4251556Srgrimes break; 4261556Srgrimes } 4271556Srgrimes } 42838521Scracauer } while (dowait(1, (struct job *)NULL) != -1); 42938521Scracauer in_waitcmd--; 43038521Scracauer 43138521Scracauer return 0; 4321556Srgrimes} 4331556Srgrimes 4341556Srgrimes 4351556Srgrimes 43617987Speterint 43790111Simpjobidcmd(int argc __unused, char **argv) 43817987Speter{ 4391556Srgrimes struct job *jp; 4401556Srgrimes int i; 4411556Srgrimes 4421556Srgrimes jp = getjob(argv[1]); 4431556Srgrimes for (i = 0 ; i < jp->nprocs ; ) { 4441556Srgrimes out1fmt("%d", jp->ps[i].pid); 4451556Srgrimes out1c(++i < jp->nprocs? ' ' : '\n'); 4461556Srgrimes } 4471556Srgrimes return 0; 4481556Srgrimes} 4491556Srgrimes 4501556Srgrimes 4511556Srgrimes 4521556Srgrimes/* 4531556Srgrimes * Convert a job name to a job structure. 4541556Srgrimes */ 4551556Srgrimes 4561556SrgrimesSTATIC struct job * 45790111Simpgetjob(char *name) 45890111Simp{ 4591556Srgrimes int jobno; 46025222Ssteve struct job *jp; 4611556Srgrimes int pid; 4621556Srgrimes int i; 4631556Srgrimes 4641556Srgrimes if (name == NULL) { 4651556Srgrimes#if JOBS 46697659Stjrcurrentjob: if ((jp = getcurjob(NULL)) == NULL) 4671556Srgrimes error("No current job"); 46897659Stjr return (jp); 4691556Srgrimes#else 4701556Srgrimes error("No current job"); 4711556Srgrimes#endif 4721556Srgrimes } else if (name[0] == '%') { 4731556Srgrimes if (is_digit(name[1])) { 4741556Srgrimes jobno = number(name + 1); 4751556Srgrimes if (jobno > 0 && jobno <= njobs 4761556Srgrimes && jobtab[jobno - 1].used != 0) 4771556Srgrimes return &jobtab[jobno - 1]; 4781556Srgrimes#if JOBS 4791556Srgrimes } else if (name[1] == '%' && name[2] == '\0') { 4801556Srgrimes goto currentjob; 4811556Srgrimes#endif 4821556Srgrimes } else { 48325222Ssteve struct job *found = NULL; 4841556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 4851556Srgrimes if (jp->used && jp->nprocs > 0 4861556Srgrimes && prefix(name + 1, jp->ps[0].cmd)) { 4871556Srgrimes if (found) 4881556Srgrimes error("%s: ambiguous", name); 4891556Srgrimes found = jp; 4901556Srgrimes } 4911556Srgrimes } 4921556Srgrimes if (found) 4931556Srgrimes return found; 4941556Srgrimes } 4951556Srgrimes } else if (is_number(name)) { 4961556Srgrimes pid = number(name); 4971556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 4981556Srgrimes if (jp->used && jp->nprocs > 0 4991556Srgrimes && jp->ps[jp->nprocs - 1].pid == pid) 5001556Srgrimes return jp; 5011556Srgrimes } 5021556Srgrimes } 5031556Srgrimes error("No such job: %s", name); 50417987Speter /*NOTREACHED*/ 50517987Speter return NULL; 5061556Srgrimes} 5071556Srgrimes 5081556Srgrimes 5091556Srgrimes 5101556Srgrimes/* 5111556Srgrimes * Return a new job structure, 5121556Srgrimes */ 5131556Srgrimes 5141556Srgrimesstruct job * 51590111Simpmakejob(union node *node __unused, int nprocs) 51617987Speter{ 5171556Srgrimes int i; 5181556Srgrimes struct job *jp; 5191556Srgrimes 5201556Srgrimes for (i = njobs, jp = jobtab ; ; jp++) { 5211556Srgrimes if (--i < 0) { 5221556Srgrimes INTOFF; 5231556Srgrimes if (njobs == 0) { 5241556Srgrimes jobtab = ckmalloc(4 * sizeof jobtab[0]); 52597659Stjr jobmru = NULL; 5261556Srgrimes } else { 5271556Srgrimes jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); 52817987Speter memcpy(jp, jobtab, njobs * sizeof jp[0]); 52997659Stjr#if JOBS 53097659Stjr /* Relocate `next' pointers and list head */ 53197659Stjr jobmru = &jp[jobmru - jobtab]; 53297659Stjr for (i = 0; i < njobs; i++) 53397659Stjr if (jp[i].next != NULL) 53497659Stjr jp[i].next = &jp[jp[i].next - 53597659Stjr jobtab]; 53697659Stjr#endif 53720425Ssteve /* Relocate `ps' pointers */ 53820425Ssteve for (i = 0; i < njobs; i++) 53920425Ssteve if (jp[i].ps == &jobtab[i].ps0) 54020425Ssteve jp[i].ps = &jp[i].ps0; 5411556Srgrimes ckfree(jobtab); 5421556Srgrimes jobtab = jp; 5431556Srgrimes } 5441556Srgrimes jp = jobtab + njobs; 5451556Srgrimes for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0); 5461556Srgrimes INTON; 5471556Srgrimes break; 5481556Srgrimes } 5491556Srgrimes if (jp->used == 0) 5501556Srgrimes break; 5511556Srgrimes } 5521556Srgrimes INTOFF; 5531556Srgrimes jp->state = 0; 5541556Srgrimes jp->used = 1; 5551556Srgrimes jp->changed = 0; 5561556Srgrimes jp->nprocs = 0; 5571556Srgrimes#if JOBS 5581556Srgrimes jp->jobctl = jobctl; 55997659Stjr jp->next = NULL; 5601556Srgrimes#endif 5611556Srgrimes if (nprocs > 1) { 5621556Srgrimes jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); 5631556Srgrimes } else { 5641556Srgrimes jp->ps = &jp->ps0; 5651556Srgrimes } 5661556Srgrimes INTON; 56717987Speter TRACE(("makejob(0x%lx, %d) returns %%%d\n", (long)node, nprocs, 56817987Speter jp - jobtab + 1)); 5691556Srgrimes return jp; 5708855Srgrimes} 5711556Srgrimes 57297659Stjr#if JOBS 57397659StjrSTATIC void 57497659Stjrsetcurjob(struct job *cj) 57597659Stjr{ 57697659Stjr struct job *jp, *prev; 5771556Srgrimes 57897659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 57997659Stjr if (jp == cj) { 58097659Stjr if (prev != NULL) 58197659Stjr prev->next = jp->next; 58297659Stjr else 58397659Stjr jobmru = jp->next; 58497659Stjr jp->next = jobmru; 58597659Stjr jobmru = cj; 58697659Stjr return; 58797659Stjr } 58897659Stjr } 58997659Stjr cj->next = jobmru; 59097659Stjr jobmru = cj; 59197659Stjr} 59297659Stjr 59397659StjrSTATIC void 59497659Stjrdeljob(struct job *j) 59597659Stjr{ 59697659Stjr struct job *jp, *prev; 59797659Stjr 59897659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 59997659Stjr if (jp == j) { 60097659Stjr if (prev != NULL) 60197659Stjr prev->next = jp->next; 60297659Stjr else 60397659Stjr jobmru = jp->next; 60497659Stjr return; 60597659Stjr } 60697659Stjr } 60797659Stjr} 60897659Stjr 6091556Srgrimes/* 61097659Stjr * Return the most recently used job that isn't `nj', and preferably one 61197659Stjr * that is stopped. 61297659Stjr */ 61397659StjrSTATIC struct job * 61497659Stjrgetcurjob(struct job *nj) 61597659Stjr{ 61697659Stjr struct job *jp; 61797659Stjr 61897659Stjr /* Try to find a stopped one.. */ 61997659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 62097659Stjr if (jp->used && jp != nj && jp->state == JOBSTOPPED) 62197659Stjr return (jp); 62297659Stjr /* Otherwise the most recently used job that isn't `nj' */ 62397659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 62497659Stjr if (jp->used && jp != nj) 62597659Stjr return (jp); 62697659Stjr 62797659Stjr return (NULL); 62897659Stjr} 62997659Stjr 63097659Stjr#endif 63197659Stjr 63297659Stjr/* 6331556Srgrimes * Fork of a subshell. If we are doing job control, give the subshell its 6341556Srgrimes * own process group. Jp is a job structure that the job is to be added to. 6351556Srgrimes * N is the command that will be evaluated by the child. Both jp and n may 6361556Srgrimes * be NULL. The mode parameter can be one of the following: 6371556Srgrimes * FORK_FG - Fork off a foreground process. 6381556Srgrimes * FORK_BG - Fork off a background process. 6391556Srgrimes * FORK_NOJOB - Like FORK_FG, but don't give the process its own 6401556Srgrimes * process group even if job control is on. 6411556Srgrimes * 6421556Srgrimes * When job control is turned off, background processes have their standard 6431556Srgrimes * input redirected to /dev/null (except for the second and later processes 6441556Srgrimes * in a pipeline). 6451556Srgrimes */ 6461556Srgrimes 6471556Srgrimesint 64890111Simpforkshell(struct job *jp, union node *n, int mode) 64917987Speter{ 6501556Srgrimes int pid; 6511556Srgrimes int pgrp; 6521556Srgrimes 65317987Speter TRACE(("forkshell(%%%d, 0x%lx, %d) called\n", jp - jobtab, (long)n, 65417987Speter mode)); 6551556Srgrimes INTOFF; 6561556Srgrimes pid = fork(); 6571556Srgrimes if (pid == -1) { 6581556Srgrimes TRACE(("Fork failed, errno=%d\n", errno)); 6591556Srgrimes INTON; 66053891Scracauer error("Cannot fork: %s", strerror(errno)); 6611556Srgrimes } 6621556Srgrimes if (pid == 0) { 6631556Srgrimes struct job *p; 6641556Srgrimes int wasroot; 6651556Srgrimes int i; 6661556Srgrimes 6671556Srgrimes TRACE(("Child shell %d\n", getpid())); 6681556Srgrimes wasroot = rootshell; 6691556Srgrimes rootshell = 0; 6701556Srgrimes for (i = njobs, p = jobtab ; --i >= 0 ; p++) 6711556Srgrimes if (p->used) 6721556Srgrimes freejob(p); 6731556Srgrimes closescript(); 6741556Srgrimes INTON; 6751556Srgrimes clear_traps(); 6761556Srgrimes#if JOBS 6771556Srgrimes jobctl = 0; /* do job control only in root shell */ 6781556Srgrimes if (wasroot && mode != FORK_NOJOB && mflag) { 6791556Srgrimes if (jp == NULL || jp->nprocs == 0) 6801556Srgrimes pgrp = getpid(); 6811556Srgrimes else 6821556Srgrimes pgrp = jp->ps[0].pid; 68321352Ssteve if (setpgid(0, pgrp) == 0 && mode == FORK_FG) { 6841556Srgrimes /*** this causes superfluous TIOCSPGRPS ***/ 68520425Ssteve#ifdef OLD_TTY_DRIVER 6861556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&pgrp) < 0) 68718016Speter error("TIOCSPGRP failed, errno=%d", errno); 68820425Ssteve#else 68920425Ssteve if (tcsetpgrp(2, pgrp) < 0) 69020425Ssteve error("tcsetpgrp failed, errno=%d", errno); 69120425Ssteve#endif 6921556Srgrimes } 6931556Srgrimes setsignal(SIGTSTP); 6941556Srgrimes setsignal(SIGTTOU); 6951556Srgrimes } else if (mode == FORK_BG) { 6961556Srgrimes ignoresig(SIGINT); 6971556Srgrimes ignoresig(SIGQUIT); 6981556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 6991556Srgrimes ! fd0_redirected_p ()) { 7001556Srgrimes close(0); 70169793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 70269793Sobrien error("Can't open %s: %s", 70369793Sobrien _PATH_DEVNULL, strerror(errno)); 7041556Srgrimes } 7051556Srgrimes } 7061556Srgrimes#else 7071556Srgrimes if (mode == FORK_BG) { 7081556Srgrimes ignoresig(SIGINT); 7091556Srgrimes ignoresig(SIGQUIT); 7101556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 7111556Srgrimes ! fd0_redirected_p ()) { 7121556Srgrimes close(0); 71369793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 71469793Sobrien error("Can't open %s: %s", 71569793Sobrien _PATH_DEVNULL, strerror(errno)); 7161556Srgrimes } 7171556Srgrimes } 7181556Srgrimes#endif 7191556Srgrimes if (wasroot && iflag) { 7201556Srgrimes setsignal(SIGINT); 7211556Srgrimes setsignal(SIGQUIT); 7221556Srgrimes setsignal(SIGTERM); 7231556Srgrimes } 7241556Srgrimes return pid; 7251556Srgrimes } 7261556Srgrimes if (rootshell && mode != FORK_NOJOB && mflag) { 7271556Srgrimes if (jp == NULL || jp->nprocs == 0) 7281556Srgrimes pgrp = pid; 7291556Srgrimes else 7301556Srgrimes pgrp = jp->ps[0].pid; 73117987Speter setpgid(pid, pgrp); 7321556Srgrimes } 7331556Srgrimes if (mode == FORK_BG) 7341556Srgrimes backgndpid = pid; /* set $! */ 7351556Srgrimes if (jp) { 7361556Srgrimes struct procstat *ps = &jp->ps[jp->nprocs++]; 7371556Srgrimes ps->pid = pid; 7381556Srgrimes ps->status = -1; 7391556Srgrimes ps->cmd = nullstr; 7401556Srgrimes if (iflag && rootshell && n) 7411556Srgrimes ps->cmd = commandtext(n); 74297659Stjr#if JOBS 74397659Stjr setcurjob(jp); 74497659Stjr#endif 7451556Srgrimes } 7461556Srgrimes INTON; 7471556Srgrimes TRACE(("In parent shell: child = %d\n", pid)); 7481556Srgrimes return pid; 7491556Srgrimes} 7501556Srgrimes 7511556Srgrimes 7521556Srgrimes 7531556Srgrimes/* 7541556Srgrimes * Wait for job to finish. 7551556Srgrimes * 7561556Srgrimes * Under job control we have the problem that while a child process is 7571556Srgrimes * running interrupts generated by the user are sent to the child but not 7581556Srgrimes * to the shell. This means that an infinite loop started by an inter- 7591556Srgrimes * active user may be hard to kill. With job control turned off, an 7601556Srgrimes * interactive user may place an interactive program inside a loop. If 7611556Srgrimes * the interactive program catches interrupts, the user doesn't want 7621556Srgrimes * these interrupts to also abort the loop. The approach we take here 7631556Srgrimes * is to have the shell ignore interrupt signals while waiting for a 76446684Skris * foreground process to terminate, and then send itself an interrupt 7651556Srgrimes * signal if the child process was terminated by an interrupt signal. 7661556Srgrimes * Unfortunately, some programs want to do a bit of cleanup and then 7671556Srgrimes * exit on interrupt; unless these processes terminate themselves by 7681556Srgrimes * sending a signal to themselves (instead of calling exit) they will 7691556Srgrimes * confuse this approach. 7701556Srgrimes */ 7711556Srgrimes 7721556Srgrimesint 77390111Simpwaitforjob(struct job *jp, int *origstatus) 77445916Scracauer{ 7751556Srgrimes#if JOBS 77617987Speter int mypgrp = getpgrp(); 7771556Srgrimes#endif 7781556Srgrimes int status; 7791556Srgrimes int st; 7801556Srgrimes 7811556Srgrimes INTOFF; 7821556Srgrimes TRACE(("waitforjob(%%%d) called\n", jp - jobtab + 1)); 78338950Scracauer while (jp->state == 0) 78438950Scracauer if (dowait(1, jp) == -1) 78538950Scracauer dotrap(); 7861556Srgrimes#if JOBS 7871556Srgrimes if (jp->jobctl) { 78820425Ssteve#ifdef OLD_TTY_DRIVER 7891556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&mypgrp) < 0) 79020425Ssteve error("TIOCSPGRP failed, errno=%d\n", errno); 79120425Ssteve#else 79220425Ssteve if (tcsetpgrp(2, mypgrp) < 0) 79320425Ssteve error("tcsetpgrp failed, errno=%d\n", errno); 79420425Ssteve#endif 7951556Srgrimes } 7961556Srgrimes if (jp->state == JOBSTOPPED) 79797659Stjr setcurjob(jp); 7981556Srgrimes#endif 7991556Srgrimes status = jp->ps[jp->nprocs - 1].status; 80045916Scracauer if (origstatus != NULL) 80145916Scracauer *origstatus = status; 8021556Srgrimes /* convert to 8 bits */ 80326104Ssteve if (WIFEXITED(status)) 80426104Ssteve st = WEXITSTATUS(status); 8051556Srgrimes#if JOBS 80626104Ssteve else if (WIFSTOPPED(status)) 80726104Ssteve st = WSTOPSIG(status) + 128; 8081556Srgrimes#endif 8091556Srgrimes else 81026104Ssteve st = WTERMSIG(status) + 128; 8111556Srgrimes if (! JOBS || jp->state == JOBDONE) 8121556Srgrimes freejob(jp); 81338521Scracauer if (int_pending()) { 81438521Scracauer if (WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) 81538521Scracauer kill(getpid(), SIGINT); 81638521Scracauer else 81738521Scracauer CLEAR_PENDING_INT; 81838521Scracauer } 8191556Srgrimes INTON; 8201556Srgrimes return st; 8211556Srgrimes} 8221556Srgrimes 8231556Srgrimes 8241556Srgrimes 8251556Srgrimes/* 8261556Srgrimes * Wait for a process to terminate. 8271556Srgrimes */ 8281556Srgrimes 8291556SrgrimesSTATIC int 83090111Simpdowait(int block, struct job *job) 83117987Speter{ 8321556Srgrimes int pid; 8331556Srgrimes int status; 8341556Srgrimes struct procstat *sp; 8351556Srgrimes struct job *jp; 8361556Srgrimes struct job *thisjob; 8371556Srgrimes int done; 8381556Srgrimes int stopped; 8391556Srgrimes int core; 84026104Ssteve int sig; 8411556Srgrimes 84238950Scracauer in_dowait++; 8431556Srgrimes TRACE(("dowait(%d) called\n", block)); 8441556Srgrimes do { 8451556Srgrimes pid = waitproc(block, &status); 8461556Srgrimes TRACE(("wait returns %d, status=%d\n", pid, status)); 84772086Scracauer } while ((pid == -1 && errno == EINTR && breakwaitcmd == 0) || 84872086Scracauer (WIFSTOPPED(status) && !iflag)); 84938950Scracauer in_dowait--; 85038521Scracauer if (breakwaitcmd != 0) { 85138521Scracauer breakwaitcmd = 0; 85238521Scracauer return -1; 85338521Scracauer } 8541556Srgrimes if (pid <= 0) 8551556Srgrimes return pid; 8561556Srgrimes INTOFF; 8571556Srgrimes thisjob = NULL; 8581556Srgrimes for (jp = jobtab ; jp < jobtab + njobs ; jp++) { 8591556Srgrimes if (jp->used) { 8601556Srgrimes done = 1; 8611556Srgrimes stopped = 1; 8621556Srgrimes for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { 8631556Srgrimes if (sp->pid == -1) 8641556Srgrimes continue; 8651556Srgrimes if (sp->pid == pid) { 86626104Ssteve TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", 86726104Ssteve pid, sp->status, status)); 8681556Srgrimes sp->status = status; 8691556Srgrimes thisjob = jp; 8701556Srgrimes } 8711556Srgrimes if (sp->status == -1) 8721556Srgrimes stopped = 0; 87326104Ssteve else if (WIFSTOPPED(sp->status)) 8741556Srgrimes done = 0; 8751556Srgrimes } 8761556Srgrimes if (stopped) { /* stopped or done */ 8771556Srgrimes int state = done? JOBDONE : JOBSTOPPED; 8781556Srgrimes if (jp->state != state) { 8791556Srgrimes TRACE(("Job %d: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); 8801556Srgrimes jp->state = state; 8811556Srgrimes#if JOBS 88297659Stjr if (done) 88397659Stjr deljob(jp); 8841556Srgrimes#endif 8851556Srgrimes } 8861556Srgrimes } 8871556Srgrimes } 8881556Srgrimes } 8891556Srgrimes INTON; 8901556Srgrimes if (! rootshell || ! iflag || (job && thisjob == job)) { 89126104Ssteve core = WCOREDUMP(status); 8921556Srgrimes#if JOBS 89326104Ssteve if (WIFSTOPPED(status)) 89426104Ssteve sig = WSTOPSIG(status); 89526104Ssteve else 8961556Srgrimes#endif 89726104Ssteve if (WIFEXITED(status)) 89826104Ssteve sig = 0; 89926104Ssteve else 90026104Ssteve sig = WTERMSIG(status); 90126104Ssteve 90226104Ssteve if (sig != 0 && sig != SIGINT && sig != SIGPIPE) { 9031556Srgrimes if (thisjob != job) 9041556Srgrimes outfmt(out2, "%d: ", pid); 9051556Srgrimes#if JOBS 90626104Ssteve if (sig == SIGTSTP && rootshell && iflag) 9071556Srgrimes outfmt(out2, "%%%d ", job - jobtab + 1); 9081556Srgrimes#endif 90926104Ssteve if (sig < NSIG && sys_siglist[sig]) 91026104Ssteve out2str(sys_siglist[sig]); 9111556Srgrimes else 91226104Ssteve outfmt(out2, "Signal %d", sig); 9131556Srgrimes if (core) 9141556Srgrimes out2str(" - core dumped"); 9151556Srgrimes out2c('\n'); 9161556Srgrimes flushout(&errout); 9171556Srgrimes } else { 91826104Ssteve TRACE(("Not printing status: status=%d, sig=%d\n", 91926104Ssteve status, sig)); 9201556Srgrimes } 9211556Srgrimes } else { 9221556Srgrimes TRACE(("Not printing status, rootshell=%d, job=0x%x\n", rootshell, job)); 9231556Srgrimes if (thisjob) 9241556Srgrimes thisjob->changed = 1; 9251556Srgrimes } 9261556Srgrimes return pid; 9271556Srgrimes} 9281556Srgrimes 9291556Srgrimes 9301556Srgrimes 9311556Srgrimes/* 9321556Srgrimes * Do a wait system call. If job control is compiled in, we accept 9331556Srgrimes * stopped processes. If block is zero, we return a value of zero 9341556Srgrimes * rather than blocking. 9351556Srgrimes * 9361556Srgrimes * System V doesn't have a non-blocking wait system call. It does 9371556Srgrimes * have a SIGCLD signal that is sent to a process when one of it's 9381556Srgrimes * children dies. The obvious way to use SIGCLD would be to install 9391556Srgrimes * a handler for SIGCLD which simply bumped a counter when a SIGCLD 9401556Srgrimes * was received, and have waitproc bump another counter when it got 9411556Srgrimes * the status of a process. Waitproc would then know that a wait 9421556Srgrimes * system call would not block if the two counters were different. 9431556Srgrimes * This approach doesn't work because if a process has children that 9441556Srgrimes * have not been waited for, System V will send it a SIGCLD when it 9451556Srgrimes * installs a signal handler for SIGCLD. What this means is that when 9461556Srgrimes * a child exits, the shell will be sent SIGCLD signals continuously 9471556Srgrimes * until is runs out of stack space, unless it does a wait call before 9481556Srgrimes * restoring the signal handler. The code below takes advantage of 9491556Srgrimes * this (mis)feature by installing a signal handler for SIGCLD and 9501556Srgrimes * then checking to see whether it was called. If there are any 9511556Srgrimes * children to be waited for, it will be. 9521556Srgrimes * 9531556Srgrimes * If neither SYSV nor BSD is defined, we don't implement nonblocking 9541556Srgrimes * waits at all. In this case, the user will not be informed when 9551556Srgrimes * a background process until the next time she runs a real program 9561556Srgrimes * (as opposed to running a builtin command or just typing return), 9571556Srgrimes * and the jobs command may give out of date information. 9581556Srgrimes */ 9591556Srgrimes 9601556Srgrimes#ifdef SYSV 96138521ScracauerSTATIC sig_atomic_t gotsigchild; 9621556Srgrimes 9631556SrgrimesSTATIC int onsigchild() { 9641556Srgrimes gotsigchild = 1; 9651556Srgrimes} 9661556Srgrimes#endif 9671556Srgrimes 9681556Srgrimes 9691556SrgrimesSTATIC int 97090111Simpwaitproc(int block, int *status) 97117987Speter{ 9721556Srgrimes#ifdef BSD 9731556Srgrimes int flags; 9741556Srgrimes 9751556Srgrimes#if JOBS 9761556Srgrimes flags = WUNTRACED; 9771556Srgrimes#else 9781556Srgrimes flags = 0; 9791556Srgrimes#endif 9801556Srgrimes if (block == 0) 9811556Srgrimes flags |= WNOHANG; 9821556Srgrimes return wait3(status, flags, (struct rusage *)NULL); 9831556Srgrimes#else 9841556Srgrimes#ifdef SYSV 9851556Srgrimes int (*save)(); 9861556Srgrimes 9871556Srgrimes if (block == 0) { 9881556Srgrimes gotsigchild = 0; 9891556Srgrimes save = signal(SIGCLD, onsigchild); 9901556Srgrimes signal(SIGCLD, save); 9911556Srgrimes if (gotsigchild == 0) 9921556Srgrimes return 0; 9931556Srgrimes } 9941556Srgrimes return wait(status); 9951556Srgrimes#else 9961556Srgrimes if (block == 0) 9971556Srgrimes return 0; 9981556Srgrimes return wait(status); 9991556Srgrimes#endif 10001556Srgrimes#endif 10011556Srgrimes} 10021556Srgrimes 10031556Srgrimes/* 10041556Srgrimes * return 1 if there are stopped jobs, otherwise 0 10051556Srgrimes */ 10061556Srgrimesint job_warning = 0; 10071556Srgrimesint 100890111Simpstoppedjobs(void) 10091556Srgrimes{ 101025222Ssteve int jobno; 101125222Ssteve struct job *jp; 10121556Srgrimes 10131556Srgrimes if (job_warning) 10141556Srgrimes return (0); 10151556Srgrimes for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { 10161556Srgrimes if (jp->used == 0) 10171556Srgrimes continue; 10181556Srgrimes if (jp->state == JOBSTOPPED) { 10191556Srgrimes out2str("You have stopped jobs.\n"); 10201556Srgrimes job_warning = 2; 10211556Srgrimes return (1); 10221556Srgrimes } 10231556Srgrimes } 10241556Srgrimes 10251556Srgrimes return (0); 10261556Srgrimes} 10271556Srgrimes 10281556Srgrimes/* 10291556Srgrimes * Return a string identifying a command (to be printed by the 10301556Srgrimes * jobs command. 10311556Srgrimes */ 10321556Srgrimes 10331556SrgrimesSTATIC char *cmdnextc; 10341556SrgrimesSTATIC int cmdnleft; 10351556Srgrimes#define MAXCMDTEXT 200 10361556Srgrimes 10371556Srgrimeschar * 103890111Simpcommandtext(union node *n) 103990111Simp{ 10401556Srgrimes char *name; 10411556Srgrimes 10421556Srgrimes cmdnextc = name = ckmalloc(MAXCMDTEXT); 10431556Srgrimes cmdnleft = MAXCMDTEXT - 4; 10441556Srgrimes cmdtxt(n); 10451556Srgrimes *cmdnextc = '\0'; 10461556Srgrimes return name; 10471556Srgrimes} 10481556Srgrimes 10491556Srgrimes 10501556SrgrimesSTATIC void 105190111Simpcmdtxt(union node *n) 105290111Simp{ 10531556Srgrimes union node *np; 10541556Srgrimes struct nodelist *lp; 10551556Srgrimes char *p; 10561556Srgrimes int i; 10571556Srgrimes char s[2]; 10581556Srgrimes 10591556Srgrimes if (n == NULL) 10601556Srgrimes return; 10611556Srgrimes switch (n->type) { 10621556Srgrimes case NSEMI: 10631556Srgrimes cmdtxt(n->nbinary.ch1); 10641556Srgrimes cmdputs("; "); 10651556Srgrimes cmdtxt(n->nbinary.ch2); 10661556Srgrimes break; 10671556Srgrimes case NAND: 10681556Srgrimes cmdtxt(n->nbinary.ch1); 10691556Srgrimes cmdputs(" && "); 10701556Srgrimes cmdtxt(n->nbinary.ch2); 10711556Srgrimes break; 10721556Srgrimes case NOR: 10731556Srgrimes cmdtxt(n->nbinary.ch1); 10741556Srgrimes cmdputs(" || "); 10751556Srgrimes cmdtxt(n->nbinary.ch2); 10761556Srgrimes break; 10771556Srgrimes case NPIPE: 10781556Srgrimes for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 10791556Srgrimes cmdtxt(lp->n); 10801556Srgrimes if (lp->next) 10811556Srgrimes cmdputs(" | "); 10821556Srgrimes } 10831556Srgrimes break; 10841556Srgrimes case NSUBSHELL: 10851556Srgrimes cmdputs("("); 10861556Srgrimes cmdtxt(n->nredir.n); 10871556Srgrimes cmdputs(")"); 10881556Srgrimes break; 10891556Srgrimes case NREDIR: 10901556Srgrimes case NBACKGND: 10911556Srgrimes cmdtxt(n->nredir.n); 10921556Srgrimes break; 10931556Srgrimes case NIF: 10941556Srgrimes cmdputs("if "); 10951556Srgrimes cmdtxt(n->nif.test); 10961556Srgrimes cmdputs("; then "); 10971556Srgrimes cmdtxt(n->nif.ifpart); 10981556Srgrimes cmdputs("..."); 10991556Srgrimes break; 11001556Srgrimes case NWHILE: 11011556Srgrimes cmdputs("while "); 11021556Srgrimes goto until; 11031556Srgrimes case NUNTIL: 11041556Srgrimes cmdputs("until "); 11051556Srgrimesuntil: 11061556Srgrimes cmdtxt(n->nbinary.ch1); 11071556Srgrimes cmdputs("; do "); 11081556Srgrimes cmdtxt(n->nbinary.ch2); 11091556Srgrimes cmdputs("; done"); 11101556Srgrimes break; 11111556Srgrimes case NFOR: 11121556Srgrimes cmdputs("for "); 11131556Srgrimes cmdputs(n->nfor.var); 11141556Srgrimes cmdputs(" in ..."); 11151556Srgrimes break; 11161556Srgrimes case NCASE: 11171556Srgrimes cmdputs("case "); 11181556Srgrimes cmdputs(n->ncase.expr->narg.text); 11191556Srgrimes cmdputs(" in ..."); 11201556Srgrimes break; 11211556Srgrimes case NDEFUN: 11221556Srgrimes cmdputs(n->narg.text); 11231556Srgrimes cmdputs("() ..."); 11241556Srgrimes break; 11251556Srgrimes case NCMD: 11261556Srgrimes for (np = n->ncmd.args ; np ; np = np->narg.next) { 11271556Srgrimes cmdtxt(np); 11281556Srgrimes if (np->narg.next) 11291556Srgrimes cmdputs(" "); 11301556Srgrimes } 11311556Srgrimes for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { 11321556Srgrimes cmdputs(" "); 11331556Srgrimes cmdtxt(np); 11341556Srgrimes } 11351556Srgrimes break; 11361556Srgrimes case NARG: 11371556Srgrimes cmdputs(n->narg.text); 11381556Srgrimes break; 11391556Srgrimes case NTO: 11401556Srgrimes p = ">"; i = 1; goto redir; 11411556Srgrimes case NAPPEND: 11421556Srgrimes p = ">>"; i = 1; goto redir; 11431556Srgrimes case NTOFD: 11441556Srgrimes p = ">&"; i = 1; goto redir; 114596922Stjr case NCLOBBER: 114696922Stjr p = ">|"; i = 1; goto redir; 11471556Srgrimes case NFROM: 11481556Srgrimes p = "<"; i = 0; goto redir; 114966612Sbrian case NFROMTO: 115066612Sbrian p = "<>"; i = 0; goto redir; 11511556Srgrimes case NFROMFD: 11521556Srgrimes p = "<&"; i = 0; goto redir; 11531556Srgrimesredir: 11541556Srgrimes if (n->nfile.fd != i) { 11551556Srgrimes s[0] = n->nfile.fd + '0'; 11561556Srgrimes s[1] = '\0'; 11571556Srgrimes cmdputs(s); 11581556Srgrimes } 11591556Srgrimes cmdputs(p); 11601556Srgrimes if (n->type == NTOFD || n->type == NFROMFD) { 11611556Srgrimes s[0] = n->ndup.dupfd + '0'; 11621556Srgrimes s[1] = '\0'; 11631556Srgrimes cmdputs(s); 11641556Srgrimes } else { 11651556Srgrimes cmdtxt(n->nfile.fname); 11661556Srgrimes } 11671556Srgrimes break; 11681556Srgrimes case NHERE: 11691556Srgrimes case NXHERE: 11701556Srgrimes cmdputs("<<..."); 11711556Srgrimes break; 11721556Srgrimes default: 11731556Srgrimes cmdputs("???"); 11741556Srgrimes break; 11751556Srgrimes } 11761556Srgrimes} 11771556Srgrimes 11781556Srgrimes 11791556Srgrimes 11801556SrgrimesSTATIC void 118190111Simpcmdputs(char *s) 118290111Simp{ 118325222Ssteve char *p, *q; 118425222Ssteve char c; 11851556Srgrimes int subtype = 0; 11861556Srgrimes 11871556Srgrimes if (cmdnleft <= 0) 11881556Srgrimes return; 11891556Srgrimes p = s; 11901556Srgrimes q = cmdnextc; 11911556Srgrimes while ((c = *p++) != '\0') { 11921556Srgrimes if (c == CTLESC) 11931556Srgrimes *q++ = *p++; 11941556Srgrimes else if (c == CTLVAR) { 11951556Srgrimes *q++ = '$'; 11961556Srgrimes if (--cmdnleft > 0) 11971556Srgrimes *q++ = '{'; 11981556Srgrimes subtype = *p++; 11991556Srgrimes } else if (c == '=' && subtype != 0) { 12001556Srgrimes *q++ = "}-+?="[(subtype & VSTYPE) - VSNORMAL]; 12011556Srgrimes subtype = 0; 12021556Srgrimes } else if (c == CTLENDVAR) { 12031556Srgrimes *q++ = '}'; 120418954Ssteve } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) 12051556Srgrimes cmdnleft++; /* ignore it */ 12061556Srgrimes else 12071556Srgrimes *q++ = c; 12081556Srgrimes if (--cmdnleft <= 0) { 12091556Srgrimes *q++ = '.'; 12101556Srgrimes *q++ = '.'; 12111556Srgrimes *q++ = '.'; 12121556Srgrimes break; 12131556Srgrimes } 12141556Srgrimes } 12151556Srgrimes cmdnextc = q; 12161556Srgrimes} 1217