jobs.c revision 97669
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 97669 2002-05-31 14:04:23Z 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 11297669StjrSTATIC void showjob(struct job *, int, int); 1131556Srgrimes 1141556Srgrimes 1151556Srgrimes/* 1161556Srgrimes * Turn job control on and off. 1171556Srgrimes * 1181556Srgrimes * Note: This code assumes that the third arg to ioctl is a character 1191556Srgrimes * pointer, which is true on Berkeley systems but not System V. Since 1201556Srgrimes * System V doesn't have job control yet, this isn't a problem now. 1211556Srgrimes */ 1221556Srgrimes 1231556SrgrimesMKINIT int jobctl; 1241556Srgrimes 12520425Ssteve#if JOBS 1261556Srgrimesvoid 12790111Simpsetjobctl(int on) 12817987Speter{ 1291556Srgrimes#ifdef OLD_TTY_DRIVER 1301556Srgrimes int ldisc; 1311556Srgrimes#endif 1321556Srgrimes 1331556Srgrimes if (on == jobctl || rootshell == 0) 1341556Srgrimes return; 1351556Srgrimes if (on) { 1361556Srgrimes do { /* while we are in the background */ 13720425Ssteve#ifdef OLD_TTY_DRIVER 1381556Srgrimes if (ioctl(2, TIOCGPGRP, (char *)&initialpgrp) < 0) { 13920425Ssteve#else 14020425Ssteve initialpgrp = tcgetpgrp(2); 14120425Ssteve if (initialpgrp < 0) { 14220425Ssteve#endif 1431556Srgrimes out2str("sh: can't access tty; job control turned off\n"); 1441556Srgrimes mflag = 0; 1451556Srgrimes return; 1461556Srgrimes } 1471556Srgrimes if (initialpgrp == -1) 14817987Speter initialpgrp = getpgrp(); 14917987Speter else if (initialpgrp != getpgrp()) { 1501556Srgrimes killpg(initialpgrp, SIGTTIN); 1511556Srgrimes continue; 1521556Srgrimes } 1531556Srgrimes } while (0); 1541556Srgrimes#ifdef OLD_TTY_DRIVER 1551556Srgrimes if (ioctl(2, TIOCGETD, (char *)&ldisc) < 0 || ldisc != NTTYDISC) { 1561556Srgrimes out2str("sh: need new tty driver to run job control; job control turned off\n"); 1571556Srgrimes mflag = 0; 1581556Srgrimes return; 1591556Srgrimes } 1601556Srgrimes#endif 1611556Srgrimes setsignal(SIGTSTP); 1621556Srgrimes setsignal(SIGTTOU); 1631556Srgrimes setsignal(SIGTTIN); 16417987Speter setpgid(0, rootpid); 16520425Ssteve#ifdef OLD_TTY_DRIVER 1661556Srgrimes ioctl(2, TIOCSPGRP, (char *)&rootpid); 16720425Ssteve#else 16820425Ssteve tcsetpgrp(2, rootpid); 16920425Ssteve#endif 1701556Srgrimes } else { /* turning job control off */ 17117987Speter setpgid(0, initialpgrp); 17220425Ssteve#ifdef OLD_TTY_DRIVER 1731556Srgrimes ioctl(2, TIOCSPGRP, (char *)&initialpgrp); 17420425Ssteve#else 17520425Ssteve tcsetpgrp(2, initialpgrp); 17620425Ssteve#endif 1771556Srgrimes setsignal(SIGTSTP); 1781556Srgrimes setsignal(SIGTTOU); 1791556Srgrimes setsignal(SIGTTIN); 1801556Srgrimes } 1811556Srgrimes jobctl = on; 1821556Srgrimes} 18320425Ssteve#endif 1841556Srgrimes 1851556Srgrimes 1861556Srgrimes#ifdef mkinit 18728346SsteveINCLUDE <sys/types.h> 18817987SpeterINCLUDE <stdlib.h> 1891556Srgrimes 1901556SrgrimesSHELLPROC { 1911556Srgrimes backgndpid = -1; 1921556Srgrimes#if JOBS 1931556Srgrimes jobctl = 0; 1941556Srgrimes#endif 1951556Srgrimes} 1961556Srgrimes 1971556Srgrimes#endif 1981556Srgrimes 1991556Srgrimes 2001556Srgrimes 2011556Srgrimes#if JOBS 20217987Speterint 20390111Simpfgcmd(int argc __unused, char **argv) 20417987Speter{ 2051556Srgrimes struct job *jp; 2061556Srgrimes int pgrp; 2071556Srgrimes int status; 2081556Srgrimes 2091556Srgrimes jp = getjob(argv[1]); 2101556Srgrimes if (jp->jobctl == 0) 2111556Srgrimes error("job not created under job control"); 21296933Stjr out1str(jp->ps[0].cmd); 21396933Stjr out1c('\n'); 21496933Stjr flushout(&output); 2151556Srgrimes pgrp = jp->ps[0].pid; 21620425Ssteve#ifdef OLD_TTY_DRIVER 2171556Srgrimes ioctl(2, TIOCSPGRP, (char *)&pgrp); 21820425Ssteve#else 21920425Ssteve tcsetpgrp(2, pgrp); 22020425Ssteve#endif 2211556Srgrimes restartjob(jp); 2221556Srgrimes INTOFF; 22345916Scracauer status = waitforjob(jp, (int *)NULL); 2241556Srgrimes INTON; 2251556Srgrimes return status; 2261556Srgrimes} 2271556Srgrimes 2281556Srgrimes 22917987Speterint 23090111Simpbgcmd(int argc, char **argv) 23117987Speter{ 23296933Stjr char s[64]; 2331556Srgrimes struct job *jp; 2341556Srgrimes 2351556Srgrimes do { 2361556Srgrimes jp = getjob(*++argv); 2371556Srgrimes if (jp->jobctl == 0) 2381556Srgrimes error("job not created under job control"); 23996933Stjr if (jp->state == JOBDONE) 24096933Stjr continue; 2411556Srgrimes restartjob(jp); 24296933Stjr fmtstr(s, 64, "[%d] ", jp - jobtab + 1); 24396933Stjr out1str(s); 24496933Stjr out1str(jp->ps[0].cmd); 24596933Stjr out1c('\n'); 2461556Srgrimes } while (--argc > 1); 2471556Srgrimes return 0; 2481556Srgrimes} 2491556Srgrimes 2501556Srgrimes 2511556SrgrimesSTATIC void 25290111Simprestartjob(struct job *jp) 25317987Speter{ 2541556Srgrimes struct procstat *ps; 2551556Srgrimes int i; 2561556Srgrimes 2571556Srgrimes if (jp->state == JOBDONE) 2581556Srgrimes return; 25997660Stjr setcurjob(jp); 2601556Srgrimes INTOFF; 2611556Srgrimes killpg(jp->ps[0].pid, SIGCONT); 2621556Srgrimes for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { 26326104Ssteve if (WIFSTOPPED(ps->status)) { 2641556Srgrimes ps->status = -1; 2651556Srgrimes jp->state = 0; 2661556Srgrimes } 2671556Srgrimes } 2681556Srgrimes INTON; 2691556Srgrimes} 2701556Srgrimes#endif 2711556Srgrimes 2721556Srgrimes 2731556Srgrimesint 27497669Stjrjobscmd(int argc, char *argv[]) 27517987Speter{ 27697669Stjr struct job *jp; 27797669Stjr char *id; 27897669Stjr int ch, sformat, lformat; 27997669Stjr 28097669Stjr optind = optreset = 1; 28197669Stjr sformat = lformat = 0; 28297669Stjr while ((ch = getopt(argc, argv, "ls")) != -1) { 28397669Stjr switch (ch) { 28497669Stjr case 'l': 28597669Stjr lformat = 1; 28697669Stjr break; 28797669Stjr case 's': 28897669Stjr sformat = 1; 28997669Stjr break; 29097669Stjr case '?': 29197669Stjr default: 29297669Stjr error("unknown option: -%c", optopt); 29397669Stjr } 29497669Stjr } 29597669Stjr argc -= optind; 29697669Stjr argv += optind; 29797669Stjr 29897669Stjr if (argc == 0) 29997669Stjr showjobs(0, sformat, lformat); 30097669Stjr else 30197669Stjr while ((id = *argv++) != NULL) 30297669Stjr showjob(getjob(id), sformat, lformat); 30397669Stjr 30497669Stjr return (0); 3051556Srgrimes} 3061556Srgrimes 30797663StjrSTATIC void 30897669Stjrshowjob(struct job *jp, int sformat, int lformat) 30997663Stjr{ 31097663Stjr char s[64]; 31197663Stjr struct procstat *ps; 31297669Stjr struct job *j; 31397669Stjr int col, curr, i, jobno, prev, procno; 31497669Stjr char c; 3151556Srgrimes 31697663Stjr procno = jp->nprocs; 31797663Stjr jobno = jp - jobtab + 1; 31897669Stjr curr = prev = 0; 31997669Stjr#if JOBS 32097669Stjr if ((j = getcurjob(NULL)) != NULL) { 32197669Stjr curr = j - jobtab + 1; 32297669Stjr if ((j = getcurjob(j)) != NULL) 32397669Stjr prev = j - jobtab + 1; 32497669Stjr } 32597669Stjr#endif 32697663Stjr for (ps = jp->ps ; ; ps++) { /* for each process */ 32797669Stjr if (sformat) { 32897669Stjr out1fmt("%d\n", ps->pid); 32997669Stjr goto skip; 33097669Stjr } 33197669Stjr if (!lformat && ps != jp->ps) 33297669Stjr goto skip; 33397669Stjr if (jobno == curr) 33497669Stjr c = '+'; 33597669Stjr else if (jobno == prev) 33697669Stjr c = '-'; 33797669Stjr else 33897669Stjr c = ' '; 33997663Stjr if (ps == jp->ps) 34097669Stjr fmtstr(s, 64, "[%d] %c ", jobno, c); 34197663Stjr else 34297669Stjr fmtstr(s, 64, " %c ", c); 34397663Stjr out1str(s); 34497663Stjr col = strlen(s); 34597669Stjr if (lformat) { 34697669Stjr fmtstr(s, 64, "%d ", ps->pid); 34797669Stjr out1str(s); 34897669Stjr col += strlen(s); 34997669Stjr } 35097663Stjr s[0] = '\0'; 35197663Stjr if (ps->status == -1) { 35297669Stjr strcpy(s, "Running"); 35397663Stjr } else if (WIFEXITED(ps->status)) { 35497663Stjr fmtstr(s, 64, "Exit %d", WEXITSTATUS(ps->status)); 35597663Stjr } else { 35697663Stjr#if JOBS 35797663Stjr if (WIFSTOPPED(ps->status)) 35897663Stjr i = WSTOPSIG(ps->status); 35997663Stjr else 36097663Stjr#endif 36197663Stjr i = WTERMSIG(ps->status); 36297663Stjr if ((i & 0x7F) < NSIG && sys_siglist[i & 0x7F]) 36397663Stjr scopy(sys_siglist[i & 0x7F], s); 36497663Stjr else 36597663Stjr fmtstr(s, 64, "Signal %d", i & 0x7F); 36697663Stjr if (WCOREDUMP(ps->status)) 36797663Stjr strcat(s, " (core dumped)"); 36897663Stjr } 36997663Stjr out1str(s); 37097663Stjr col += strlen(s); 37197663Stjr do { 37297663Stjr out1c(' '); 37397663Stjr col++; 37497663Stjr } while (col < 30); 37597663Stjr out1str(ps->cmd); 37697663Stjr out1c('\n'); 37797669Stjrskip: if (--procno <= 0) 37897663Stjr break; 37997663Stjr } 38097663Stjr} 38197663Stjr 3821556Srgrimes/* 3831556Srgrimes * Print a list of jobs. If "change" is nonzero, only print jobs whose 3841556Srgrimes * statuses have changed since the last call to showjobs. 3851556Srgrimes * 3861556Srgrimes * If the shell is interrupted in the process of creating a job, the 3871556Srgrimes * result may be a job structure containing zero processes. Such structures 3881556Srgrimes * will be freed here. 3891556Srgrimes */ 3901556Srgrimes 3911556Srgrimesvoid 39297669Stjrshowjobs(int change, int sformat, int lformat) 39317987Speter{ 3941556Srgrimes int jobno; 3951556Srgrimes struct job *jp; 3961556Srgrimes 3971556Srgrimes TRACE(("showjobs(%d) called\n", change)); 3981556Srgrimes while (dowait(0, (struct job *)NULL) > 0); 3991556Srgrimes for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) { 4001556Srgrimes if (! jp->used) 4011556Srgrimes continue; 4021556Srgrimes if (jp->nprocs == 0) { 4031556Srgrimes freejob(jp); 4041556Srgrimes continue; 4051556Srgrimes } 4061556Srgrimes if (change && ! jp->changed) 4071556Srgrimes continue; 40897669Stjr showjob(jp, sformat, lformat); 4091556Srgrimes jp->changed = 0; 4101556Srgrimes if (jp->state == JOBDONE) { 4111556Srgrimes freejob(jp); 4121556Srgrimes } 4131556Srgrimes } 4141556Srgrimes} 4151556Srgrimes 4161556Srgrimes 4171556Srgrimes/* 4181556Srgrimes * Mark a job structure as unused. 4191556Srgrimes */ 4201556Srgrimes 4211556SrgrimesSTATIC void 42290111Simpfreejob(struct job *jp) 42390111Simp{ 4241556Srgrimes struct procstat *ps; 4251556Srgrimes int i; 4261556Srgrimes 4271556Srgrimes INTOFF; 4281556Srgrimes for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { 4291556Srgrimes if (ps->cmd != nullstr) 4301556Srgrimes ckfree(ps->cmd); 4311556Srgrimes } 4321556Srgrimes if (jp->ps != &jp->ps0) 4331556Srgrimes ckfree(jp->ps); 4341556Srgrimes jp->used = 0; 4351556Srgrimes#if JOBS 43697659Stjr deljob(jp); 4371556Srgrimes#endif 4381556Srgrimes INTON; 4391556Srgrimes} 4401556Srgrimes 4411556Srgrimes 4421556Srgrimes 4431556Srgrimesint 44490111Simpwaitcmd(int argc, char **argv) 44517987Speter{ 4461556Srgrimes struct job *job; 44726104Ssteve int status, retval; 4481556Srgrimes struct job *jp; 4491556Srgrimes 4501556Srgrimes if (argc > 1) { 4511556Srgrimes job = getjob(argv[1]); 4521556Srgrimes } else { 4531556Srgrimes job = NULL; 4541556Srgrimes } 45538536Scracauer 45638536Scracauer /* 45738536Scracauer * Loop until a process is terminated or stopped, or a SIGINT is 45838536Scracauer * received. 45938536Scracauer */ 46038536Scracauer 46138521Scracauer in_waitcmd++; 46238536Scracauer do { 4631556Srgrimes if (job != NULL) { 4641556Srgrimes if (job->state) { 4651556Srgrimes status = job->ps[job->nprocs - 1].status; 46626104Ssteve if (WIFEXITED(status)) 46726104Ssteve retval = WEXITSTATUS(status); 4681556Srgrimes#if JOBS 46926104Ssteve else if (WIFSTOPPED(status)) 47026104Ssteve retval = WSTOPSIG(status) + 128; 4711556Srgrimes#endif 4721556Srgrimes else 47326104Ssteve retval = WTERMSIG(status) + 128; 4741556Srgrimes if (! iflag) 4751556Srgrimes freejob(job); 47638536Scracauer in_waitcmd--; 47726104Ssteve return retval; 4781556Srgrimes } 4791556Srgrimes } else { 4801556Srgrimes for (jp = jobtab ; ; jp++) { 4811556Srgrimes if (jp >= jobtab + njobs) { /* no running procs */ 48238536Scracauer in_waitcmd--; 4831556Srgrimes return 0; 4841556Srgrimes } 4851556Srgrimes if (jp->used && jp->state == 0) 4861556Srgrimes break; 4871556Srgrimes } 4881556Srgrimes } 48938521Scracauer } while (dowait(1, (struct job *)NULL) != -1); 49038521Scracauer in_waitcmd--; 49138521Scracauer 49238521Scracauer return 0; 4931556Srgrimes} 4941556Srgrimes 4951556Srgrimes 4961556Srgrimes 49717987Speterint 49890111Simpjobidcmd(int argc __unused, char **argv) 49917987Speter{ 5001556Srgrimes struct job *jp; 5011556Srgrimes int i; 5021556Srgrimes 5031556Srgrimes jp = getjob(argv[1]); 5041556Srgrimes for (i = 0 ; i < jp->nprocs ; ) { 5051556Srgrimes out1fmt("%d", jp->ps[i].pid); 5061556Srgrimes out1c(++i < jp->nprocs? ' ' : '\n'); 5071556Srgrimes } 5081556Srgrimes return 0; 5091556Srgrimes} 5101556Srgrimes 5111556Srgrimes 5121556Srgrimes 5131556Srgrimes/* 5141556Srgrimes * Convert a job name to a job structure. 5151556Srgrimes */ 5161556Srgrimes 5171556SrgrimesSTATIC struct job * 51890111Simpgetjob(char *name) 51990111Simp{ 5201556Srgrimes int jobno; 52125222Ssteve struct job *jp; 5221556Srgrimes int pid; 5231556Srgrimes int i; 5241556Srgrimes 5251556Srgrimes if (name == NULL) { 5261556Srgrimes#if JOBS 52797659Stjrcurrentjob: if ((jp = getcurjob(NULL)) == NULL) 5281556Srgrimes error("No current job"); 52997659Stjr return (jp); 5301556Srgrimes#else 5311556Srgrimes error("No current job"); 5321556Srgrimes#endif 5331556Srgrimes } else if (name[0] == '%') { 5341556Srgrimes if (is_digit(name[1])) { 5351556Srgrimes jobno = number(name + 1); 5361556Srgrimes if (jobno > 0 && jobno <= njobs 5371556Srgrimes && jobtab[jobno - 1].used != 0) 5381556Srgrimes return &jobtab[jobno - 1]; 5391556Srgrimes#if JOBS 5401556Srgrimes } else if (name[1] == '%' && name[2] == '\0') { 5411556Srgrimes goto currentjob; 5421556Srgrimes#endif 5431556Srgrimes } else { 54425222Ssteve struct job *found = NULL; 5451556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 5461556Srgrimes if (jp->used && jp->nprocs > 0 5471556Srgrimes && prefix(name + 1, jp->ps[0].cmd)) { 5481556Srgrimes if (found) 5491556Srgrimes error("%s: ambiguous", name); 5501556Srgrimes found = jp; 5511556Srgrimes } 5521556Srgrimes } 5531556Srgrimes if (found) 5541556Srgrimes return found; 5551556Srgrimes } 5561556Srgrimes } else if (is_number(name)) { 5571556Srgrimes pid = number(name); 5581556Srgrimes for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { 5591556Srgrimes if (jp->used && jp->nprocs > 0 5601556Srgrimes && jp->ps[jp->nprocs - 1].pid == pid) 5611556Srgrimes return jp; 5621556Srgrimes } 5631556Srgrimes } 5641556Srgrimes error("No such job: %s", name); 56517987Speter /*NOTREACHED*/ 56617987Speter return NULL; 5671556Srgrimes} 5681556Srgrimes 5691556Srgrimes 5701556Srgrimes 5711556Srgrimes/* 5721556Srgrimes * Return a new job structure, 5731556Srgrimes */ 5741556Srgrimes 5751556Srgrimesstruct job * 57690111Simpmakejob(union node *node __unused, int nprocs) 57717987Speter{ 5781556Srgrimes int i; 5791556Srgrimes struct job *jp; 5801556Srgrimes 5811556Srgrimes for (i = njobs, jp = jobtab ; ; jp++) { 5821556Srgrimes if (--i < 0) { 5831556Srgrimes INTOFF; 5841556Srgrimes if (njobs == 0) { 5851556Srgrimes jobtab = ckmalloc(4 * sizeof jobtab[0]); 58697664Stjr#if JOBS 58797659Stjr jobmru = NULL; 58897664Stjr#endif 5891556Srgrimes } else { 5901556Srgrimes jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); 59117987Speter memcpy(jp, jobtab, njobs * sizeof jp[0]); 59297659Stjr#if JOBS 59397659Stjr /* Relocate `next' pointers and list head */ 59497659Stjr jobmru = &jp[jobmru - jobtab]; 59597659Stjr for (i = 0; i < njobs; i++) 59697659Stjr if (jp[i].next != NULL) 59797659Stjr jp[i].next = &jp[jp[i].next - 59897659Stjr jobtab]; 59997659Stjr#endif 60020425Ssteve /* Relocate `ps' pointers */ 60120425Ssteve for (i = 0; i < njobs; i++) 60220425Ssteve if (jp[i].ps == &jobtab[i].ps0) 60320425Ssteve jp[i].ps = &jp[i].ps0; 6041556Srgrimes ckfree(jobtab); 6051556Srgrimes jobtab = jp; 6061556Srgrimes } 6071556Srgrimes jp = jobtab + njobs; 6081556Srgrimes for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0); 6091556Srgrimes INTON; 6101556Srgrimes break; 6111556Srgrimes } 6121556Srgrimes if (jp->used == 0) 6131556Srgrimes break; 6141556Srgrimes } 6151556Srgrimes INTOFF; 6161556Srgrimes jp->state = 0; 6171556Srgrimes jp->used = 1; 6181556Srgrimes jp->changed = 0; 6191556Srgrimes jp->nprocs = 0; 6201556Srgrimes#if JOBS 6211556Srgrimes jp->jobctl = jobctl; 62297659Stjr jp->next = NULL; 6231556Srgrimes#endif 6241556Srgrimes if (nprocs > 1) { 6251556Srgrimes jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); 6261556Srgrimes } else { 6271556Srgrimes jp->ps = &jp->ps0; 6281556Srgrimes } 6291556Srgrimes INTON; 63017987Speter TRACE(("makejob(0x%lx, %d) returns %%%d\n", (long)node, nprocs, 63117987Speter jp - jobtab + 1)); 6321556Srgrimes return jp; 6338855Srgrimes} 6341556Srgrimes 63597659Stjr#if JOBS 63697659StjrSTATIC void 63797659Stjrsetcurjob(struct job *cj) 63897659Stjr{ 63997659Stjr struct job *jp, *prev; 6401556Srgrimes 64197659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 64297659Stjr if (jp == cj) { 64397659Stjr if (prev != NULL) 64497659Stjr prev->next = jp->next; 64597659Stjr else 64697659Stjr jobmru = jp->next; 64797659Stjr jp->next = jobmru; 64897659Stjr jobmru = cj; 64997659Stjr return; 65097659Stjr } 65197659Stjr } 65297659Stjr cj->next = jobmru; 65397659Stjr jobmru = cj; 65497659Stjr} 65597659Stjr 65697659StjrSTATIC void 65797659Stjrdeljob(struct job *j) 65897659Stjr{ 65997659Stjr struct job *jp, *prev; 66097659Stjr 66197659Stjr for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { 66297659Stjr if (jp == j) { 66397659Stjr if (prev != NULL) 66497659Stjr prev->next = jp->next; 66597659Stjr else 66697659Stjr jobmru = jp->next; 66797659Stjr return; 66897659Stjr } 66997659Stjr } 67097659Stjr} 67197659Stjr 6721556Srgrimes/* 67397659Stjr * Return the most recently used job that isn't `nj', and preferably one 67497659Stjr * that is stopped. 67597659Stjr */ 67697659StjrSTATIC struct job * 67797659Stjrgetcurjob(struct job *nj) 67897659Stjr{ 67997659Stjr struct job *jp; 68097659Stjr 68197659Stjr /* Try to find a stopped one.. */ 68297659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 68397659Stjr if (jp->used && jp != nj && jp->state == JOBSTOPPED) 68497659Stjr return (jp); 68597659Stjr /* Otherwise the most recently used job that isn't `nj' */ 68697659Stjr for (jp = jobmru; jp != NULL; jp = jp->next) 68797659Stjr if (jp->used && jp != nj) 68897659Stjr return (jp); 68997659Stjr 69097659Stjr return (NULL); 69197659Stjr} 69297659Stjr 69397659Stjr#endif 69497659Stjr 69597659Stjr/* 6961556Srgrimes * Fork of a subshell. If we are doing job control, give the subshell its 6971556Srgrimes * own process group. Jp is a job structure that the job is to be added to. 6981556Srgrimes * N is the command that will be evaluated by the child. Both jp and n may 6991556Srgrimes * be NULL. The mode parameter can be one of the following: 7001556Srgrimes * FORK_FG - Fork off a foreground process. 7011556Srgrimes * FORK_BG - Fork off a background process. 7021556Srgrimes * FORK_NOJOB - Like FORK_FG, but don't give the process its own 7031556Srgrimes * process group even if job control is on. 7041556Srgrimes * 7051556Srgrimes * When job control is turned off, background processes have their standard 7061556Srgrimes * input redirected to /dev/null (except for the second and later processes 7071556Srgrimes * in a pipeline). 7081556Srgrimes */ 7091556Srgrimes 7101556Srgrimesint 71190111Simpforkshell(struct job *jp, union node *n, int mode) 71217987Speter{ 7131556Srgrimes int pid; 7141556Srgrimes int pgrp; 7151556Srgrimes 71617987Speter TRACE(("forkshell(%%%d, 0x%lx, %d) called\n", jp - jobtab, (long)n, 71717987Speter mode)); 7181556Srgrimes INTOFF; 7191556Srgrimes pid = fork(); 7201556Srgrimes if (pid == -1) { 7211556Srgrimes TRACE(("Fork failed, errno=%d\n", errno)); 7221556Srgrimes INTON; 72353891Scracauer error("Cannot fork: %s", strerror(errno)); 7241556Srgrimes } 7251556Srgrimes if (pid == 0) { 7261556Srgrimes struct job *p; 7271556Srgrimes int wasroot; 7281556Srgrimes int i; 7291556Srgrimes 7301556Srgrimes TRACE(("Child shell %d\n", getpid())); 7311556Srgrimes wasroot = rootshell; 7321556Srgrimes rootshell = 0; 7331556Srgrimes for (i = njobs, p = jobtab ; --i >= 0 ; p++) 7341556Srgrimes if (p->used) 7351556Srgrimes freejob(p); 7361556Srgrimes closescript(); 7371556Srgrimes INTON; 7381556Srgrimes clear_traps(); 7391556Srgrimes#if JOBS 7401556Srgrimes jobctl = 0; /* do job control only in root shell */ 7411556Srgrimes if (wasroot && mode != FORK_NOJOB && mflag) { 7421556Srgrimes if (jp == NULL || jp->nprocs == 0) 7431556Srgrimes pgrp = getpid(); 7441556Srgrimes else 7451556Srgrimes pgrp = jp->ps[0].pid; 74621352Ssteve if (setpgid(0, pgrp) == 0 && mode == FORK_FG) { 7471556Srgrimes /*** this causes superfluous TIOCSPGRPS ***/ 74820425Ssteve#ifdef OLD_TTY_DRIVER 7491556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&pgrp) < 0) 75018016Speter error("TIOCSPGRP failed, errno=%d", errno); 75120425Ssteve#else 75220425Ssteve if (tcsetpgrp(2, pgrp) < 0) 75320425Ssteve error("tcsetpgrp failed, errno=%d", errno); 75420425Ssteve#endif 7551556Srgrimes } 7561556Srgrimes setsignal(SIGTSTP); 7571556Srgrimes setsignal(SIGTTOU); 7581556Srgrimes } else if (mode == FORK_BG) { 7591556Srgrimes ignoresig(SIGINT); 7601556Srgrimes ignoresig(SIGQUIT); 7611556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 7621556Srgrimes ! fd0_redirected_p ()) { 7631556Srgrimes close(0); 76469793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 76569793Sobrien error("Can't open %s: %s", 76669793Sobrien _PATH_DEVNULL, strerror(errno)); 7671556Srgrimes } 7681556Srgrimes } 7691556Srgrimes#else 7701556Srgrimes if (mode == FORK_BG) { 7711556Srgrimes ignoresig(SIGINT); 7721556Srgrimes ignoresig(SIGQUIT); 7731556Srgrimes if ((jp == NULL || jp->nprocs == 0) && 7741556Srgrimes ! fd0_redirected_p ()) { 7751556Srgrimes close(0); 77669793Sobrien if (open(_PATH_DEVNULL, O_RDONLY) != 0) 77769793Sobrien error("Can't open %s: %s", 77869793Sobrien _PATH_DEVNULL, strerror(errno)); 7791556Srgrimes } 7801556Srgrimes } 7811556Srgrimes#endif 7821556Srgrimes if (wasroot && iflag) { 7831556Srgrimes setsignal(SIGINT); 7841556Srgrimes setsignal(SIGQUIT); 7851556Srgrimes setsignal(SIGTERM); 7861556Srgrimes } 7871556Srgrimes return pid; 7881556Srgrimes } 7891556Srgrimes if (rootshell && mode != FORK_NOJOB && mflag) { 7901556Srgrimes if (jp == NULL || jp->nprocs == 0) 7911556Srgrimes pgrp = pid; 7921556Srgrimes else 7931556Srgrimes pgrp = jp->ps[0].pid; 79417987Speter setpgid(pid, pgrp); 7951556Srgrimes } 7961556Srgrimes if (mode == FORK_BG) 7971556Srgrimes backgndpid = pid; /* set $! */ 7981556Srgrimes if (jp) { 7991556Srgrimes struct procstat *ps = &jp->ps[jp->nprocs++]; 8001556Srgrimes ps->pid = pid; 8011556Srgrimes ps->status = -1; 8021556Srgrimes ps->cmd = nullstr; 8031556Srgrimes if (iflag && rootshell && n) 8041556Srgrimes ps->cmd = commandtext(n); 80597659Stjr#if JOBS 80697659Stjr setcurjob(jp); 80797659Stjr#endif 8081556Srgrimes } 8091556Srgrimes INTON; 8101556Srgrimes TRACE(("In parent shell: child = %d\n", pid)); 8111556Srgrimes return pid; 8121556Srgrimes} 8131556Srgrimes 8141556Srgrimes 8151556Srgrimes 8161556Srgrimes/* 8171556Srgrimes * Wait for job to finish. 8181556Srgrimes * 8191556Srgrimes * Under job control we have the problem that while a child process is 8201556Srgrimes * running interrupts generated by the user are sent to the child but not 8211556Srgrimes * to the shell. This means that an infinite loop started by an inter- 8221556Srgrimes * active user may be hard to kill. With job control turned off, an 8231556Srgrimes * interactive user may place an interactive program inside a loop. If 8241556Srgrimes * the interactive program catches interrupts, the user doesn't want 8251556Srgrimes * these interrupts to also abort the loop. The approach we take here 8261556Srgrimes * is to have the shell ignore interrupt signals while waiting for a 82746684Skris * foreground process to terminate, and then send itself an interrupt 8281556Srgrimes * signal if the child process was terminated by an interrupt signal. 8291556Srgrimes * Unfortunately, some programs want to do a bit of cleanup and then 8301556Srgrimes * exit on interrupt; unless these processes terminate themselves by 8311556Srgrimes * sending a signal to themselves (instead of calling exit) they will 8321556Srgrimes * confuse this approach. 8331556Srgrimes */ 8341556Srgrimes 8351556Srgrimesint 83690111Simpwaitforjob(struct job *jp, int *origstatus) 83745916Scracauer{ 8381556Srgrimes#if JOBS 83917987Speter int mypgrp = getpgrp(); 8401556Srgrimes#endif 8411556Srgrimes int status; 8421556Srgrimes int st; 8431556Srgrimes 8441556Srgrimes INTOFF; 8451556Srgrimes TRACE(("waitforjob(%%%d) called\n", jp - jobtab + 1)); 84638950Scracauer while (jp->state == 0) 84738950Scracauer if (dowait(1, jp) == -1) 84838950Scracauer dotrap(); 8491556Srgrimes#if JOBS 8501556Srgrimes if (jp->jobctl) { 85120425Ssteve#ifdef OLD_TTY_DRIVER 8521556Srgrimes if (ioctl(2, TIOCSPGRP, (char *)&mypgrp) < 0) 85320425Ssteve error("TIOCSPGRP failed, errno=%d\n", errno); 85420425Ssteve#else 85520425Ssteve if (tcsetpgrp(2, mypgrp) < 0) 85620425Ssteve error("tcsetpgrp failed, errno=%d\n", errno); 85720425Ssteve#endif 8581556Srgrimes } 8591556Srgrimes if (jp->state == JOBSTOPPED) 86097659Stjr setcurjob(jp); 8611556Srgrimes#endif 8621556Srgrimes status = jp->ps[jp->nprocs - 1].status; 86345916Scracauer if (origstatus != NULL) 86445916Scracauer *origstatus = status; 8651556Srgrimes /* convert to 8 bits */ 86626104Ssteve if (WIFEXITED(status)) 86726104Ssteve st = WEXITSTATUS(status); 8681556Srgrimes#if JOBS 86926104Ssteve else if (WIFSTOPPED(status)) 87026104Ssteve st = WSTOPSIG(status) + 128; 8711556Srgrimes#endif 8721556Srgrimes else 87326104Ssteve st = WTERMSIG(status) + 128; 8741556Srgrimes if (! JOBS || jp->state == JOBDONE) 8751556Srgrimes freejob(jp); 87638521Scracauer if (int_pending()) { 87738521Scracauer if (WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) 87838521Scracauer kill(getpid(), SIGINT); 87938521Scracauer else 88038521Scracauer CLEAR_PENDING_INT; 88138521Scracauer } 8821556Srgrimes INTON; 8831556Srgrimes return st; 8841556Srgrimes} 8851556Srgrimes 8861556Srgrimes 8871556Srgrimes 8881556Srgrimes/* 8891556Srgrimes * Wait for a process to terminate. 8901556Srgrimes */ 8911556Srgrimes 8921556SrgrimesSTATIC int 89390111Simpdowait(int block, struct job *job) 89417987Speter{ 8951556Srgrimes int pid; 8961556Srgrimes int status; 8971556Srgrimes struct procstat *sp; 8981556Srgrimes struct job *jp; 8991556Srgrimes struct job *thisjob; 9001556Srgrimes int done; 9011556Srgrimes int stopped; 9021556Srgrimes int core; 90326104Ssteve int sig; 9041556Srgrimes 90538950Scracauer in_dowait++; 9061556Srgrimes TRACE(("dowait(%d) called\n", block)); 9071556Srgrimes do { 9081556Srgrimes pid = waitproc(block, &status); 9091556Srgrimes TRACE(("wait returns %d, status=%d\n", pid, status)); 91072086Scracauer } while ((pid == -1 && errno == EINTR && breakwaitcmd == 0) || 91172086Scracauer (WIFSTOPPED(status) && !iflag)); 91238950Scracauer in_dowait--; 91338521Scracauer if (breakwaitcmd != 0) { 91438521Scracauer breakwaitcmd = 0; 91538521Scracauer return -1; 91638521Scracauer } 9171556Srgrimes if (pid <= 0) 9181556Srgrimes return pid; 9191556Srgrimes INTOFF; 9201556Srgrimes thisjob = NULL; 9211556Srgrimes for (jp = jobtab ; jp < jobtab + njobs ; jp++) { 9221556Srgrimes if (jp->used) { 9231556Srgrimes done = 1; 9241556Srgrimes stopped = 1; 9251556Srgrimes for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { 9261556Srgrimes if (sp->pid == -1) 9271556Srgrimes continue; 9281556Srgrimes if (sp->pid == pid) { 92926104Ssteve TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", 93026104Ssteve pid, sp->status, status)); 9311556Srgrimes sp->status = status; 9321556Srgrimes thisjob = jp; 9331556Srgrimes } 9341556Srgrimes if (sp->status == -1) 9351556Srgrimes stopped = 0; 93626104Ssteve else if (WIFSTOPPED(sp->status)) 9371556Srgrimes done = 0; 9381556Srgrimes } 9391556Srgrimes if (stopped) { /* stopped or done */ 9401556Srgrimes int state = done? JOBDONE : JOBSTOPPED; 9411556Srgrimes if (jp->state != state) { 9421556Srgrimes TRACE(("Job %d: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); 9431556Srgrimes jp->state = state; 9441556Srgrimes#if JOBS 94597659Stjr if (done) 94697659Stjr deljob(jp); 9471556Srgrimes#endif 9481556Srgrimes } 9491556Srgrimes } 9501556Srgrimes } 9511556Srgrimes } 9521556Srgrimes INTON; 9531556Srgrimes if (! rootshell || ! iflag || (job && thisjob == job)) { 9541556Srgrimes#if JOBS 95526104Ssteve if (WIFSTOPPED(status)) 95626104Ssteve sig = WSTOPSIG(status); 95726104Ssteve else 9581556Srgrimes#endif 95997663Stjr { 96026104Ssteve if (WIFEXITED(status)) 96126104Ssteve sig = 0; 96226104Ssteve else 96326104Ssteve sig = WTERMSIG(status); 9641556Srgrimes } 96597663Stjr if (sig != 0 && sig != SIGINT && sig != SIGPIPE) 96697669Stjr showjob(thisjob, 0, 0); 9671556Srgrimes } else { 9681556Srgrimes TRACE(("Not printing status, rootshell=%d, job=0x%x\n", rootshell, job)); 9691556Srgrimes if (thisjob) 9701556Srgrimes thisjob->changed = 1; 9711556Srgrimes } 9721556Srgrimes return pid; 9731556Srgrimes} 9741556Srgrimes 9751556Srgrimes 9761556Srgrimes 9771556Srgrimes/* 9781556Srgrimes * Do a wait system call. If job control is compiled in, we accept 9791556Srgrimes * stopped processes. If block is zero, we return a value of zero 9801556Srgrimes * rather than blocking. 9811556Srgrimes * 9821556Srgrimes * System V doesn't have a non-blocking wait system call. It does 9831556Srgrimes * have a SIGCLD signal that is sent to a process when one of it's 9841556Srgrimes * children dies. The obvious way to use SIGCLD would be to install 9851556Srgrimes * a handler for SIGCLD which simply bumped a counter when a SIGCLD 9861556Srgrimes * was received, and have waitproc bump another counter when it got 9871556Srgrimes * the status of a process. Waitproc would then know that a wait 9881556Srgrimes * system call would not block if the two counters were different. 9891556Srgrimes * This approach doesn't work because if a process has children that 9901556Srgrimes * have not been waited for, System V will send it a SIGCLD when it 9911556Srgrimes * installs a signal handler for SIGCLD. What this means is that when 9921556Srgrimes * a child exits, the shell will be sent SIGCLD signals continuously 9931556Srgrimes * until is runs out of stack space, unless it does a wait call before 9941556Srgrimes * restoring the signal handler. The code below takes advantage of 9951556Srgrimes * this (mis)feature by installing a signal handler for SIGCLD and 9961556Srgrimes * then checking to see whether it was called. If there are any 9971556Srgrimes * children to be waited for, it will be. 9981556Srgrimes * 9991556Srgrimes * If neither SYSV nor BSD is defined, we don't implement nonblocking 10001556Srgrimes * waits at all. In this case, the user will not be informed when 10011556Srgrimes * a background process until the next time she runs a real program 10021556Srgrimes * (as opposed to running a builtin command or just typing return), 10031556Srgrimes * and the jobs command may give out of date information. 10041556Srgrimes */ 10051556Srgrimes 10061556Srgrimes#ifdef SYSV 100738521ScracauerSTATIC sig_atomic_t gotsigchild; 10081556Srgrimes 10091556SrgrimesSTATIC int onsigchild() { 10101556Srgrimes gotsigchild = 1; 10111556Srgrimes} 10121556Srgrimes#endif 10131556Srgrimes 10141556Srgrimes 10151556SrgrimesSTATIC int 101690111Simpwaitproc(int block, int *status) 101717987Speter{ 10181556Srgrimes#ifdef BSD 10191556Srgrimes int flags; 10201556Srgrimes 10211556Srgrimes#if JOBS 10221556Srgrimes flags = WUNTRACED; 10231556Srgrimes#else 10241556Srgrimes flags = 0; 10251556Srgrimes#endif 10261556Srgrimes if (block == 0) 10271556Srgrimes flags |= WNOHANG; 10281556Srgrimes return wait3(status, flags, (struct rusage *)NULL); 10291556Srgrimes#else 10301556Srgrimes#ifdef SYSV 10311556Srgrimes int (*save)(); 10321556Srgrimes 10331556Srgrimes if (block == 0) { 10341556Srgrimes gotsigchild = 0; 10351556Srgrimes save = signal(SIGCLD, onsigchild); 10361556Srgrimes signal(SIGCLD, save); 10371556Srgrimes if (gotsigchild == 0) 10381556Srgrimes return 0; 10391556Srgrimes } 10401556Srgrimes return wait(status); 10411556Srgrimes#else 10421556Srgrimes if (block == 0) 10431556Srgrimes return 0; 10441556Srgrimes return wait(status); 10451556Srgrimes#endif 10461556Srgrimes#endif 10471556Srgrimes} 10481556Srgrimes 10491556Srgrimes/* 10501556Srgrimes * return 1 if there are stopped jobs, otherwise 0 10511556Srgrimes */ 10521556Srgrimesint job_warning = 0; 10531556Srgrimesint 105490111Simpstoppedjobs(void) 10551556Srgrimes{ 105625222Ssteve int jobno; 105725222Ssteve struct job *jp; 10581556Srgrimes 10591556Srgrimes if (job_warning) 10601556Srgrimes return (0); 10611556Srgrimes for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { 10621556Srgrimes if (jp->used == 0) 10631556Srgrimes continue; 10641556Srgrimes if (jp->state == JOBSTOPPED) { 10651556Srgrimes out2str("You have stopped jobs.\n"); 10661556Srgrimes job_warning = 2; 10671556Srgrimes return (1); 10681556Srgrimes } 10691556Srgrimes } 10701556Srgrimes 10711556Srgrimes return (0); 10721556Srgrimes} 10731556Srgrimes 10741556Srgrimes/* 10751556Srgrimes * Return a string identifying a command (to be printed by the 10761556Srgrimes * jobs command. 10771556Srgrimes */ 10781556Srgrimes 10791556SrgrimesSTATIC char *cmdnextc; 10801556SrgrimesSTATIC int cmdnleft; 10811556Srgrimes#define MAXCMDTEXT 200 10821556Srgrimes 10831556Srgrimeschar * 108490111Simpcommandtext(union node *n) 108590111Simp{ 10861556Srgrimes char *name; 10871556Srgrimes 10881556Srgrimes cmdnextc = name = ckmalloc(MAXCMDTEXT); 10891556Srgrimes cmdnleft = MAXCMDTEXT - 4; 10901556Srgrimes cmdtxt(n); 10911556Srgrimes *cmdnextc = '\0'; 10921556Srgrimes return name; 10931556Srgrimes} 10941556Srgrimes 10951556Srgrimes 10961556SrgrimesSTATIC void 109790111Simpcmdtxt(union node *n) 109890111Simp{ 10991556Srgrimes union node *np; 11001556Srgrimes struct nodelist *lp; 11011556Srgrimes char *p; 11021556Srgrimes int i; 11031556Srgrimes char s[2]; 11041556Srgrimes 11051556Srgrimes if (n == NULL) 11061556Srgrimes return; 11071556Srgrimes switch (n->type) { 11081556Srgrimes case NSEMI: 11091556Srgrimes cmdtxt(n->nbinary.ch1); 11101556Srgrimes cmdputs("; "); 11111556Srgrimes cmdtxt(n->nbinary.ch2); 11121556Srgrimes break; 11131556Srgrimes case NAND: 11141556Srgrimes cmdtxt(n->nbinary.ch1); 11151556Srgrimes cmdputs(" && "); 11161556Srgrimes cmdtxt(n->nbinary.ch2); 11171556Srgrimes break; 11181556Srgrimes case NOR: 11191556Srgrimes cmdtxt(n->nbinary.ch1); 11201556Srgrimes cmdputs(" || "); 11211556Srgrimes cmdtxt(n->nbinary.ch2); 11221556Srgrimes break; 11231556Srgrimes case NPIPE: 11241556Srgrimes for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { 11251556Srgrimes cmdtxt(lp->n); 11261556Srgrimes if (lp->next) 11271556Srgrimes cmdputs(" | "); 11281556Srgrimes } 11291556Srgrimes break; 11301556Srgrimes case NSUBSHELL: 11311556Srgrimes cmdputs("("); 11321556Srgrimes cmdtxt(n->nredir.n); 11331556Srgrimes cmdputs(")"); 11341556Srgrimes break; 11351556Srgrimes case NREDIR: 11361556Srgrimes case NBACKGND: 11371556Srgrimes cmdtxt(n->nredir.n); 11381556Srgrimes break; 11391556Srgrimes case NIF: 11401556Srgrimes cmdputs("if "); 11411556Srgrimes cmdtxt(n->nif.test); 11421556Srgrimes cmdputs("; then "); 11431556Srgrimes cmdtxt(n->nif.ifpart); 11441556Srgrimes cmdputs("..."); 11451556Srgrimes break; 11461556Srgrimes case NWHILE: 11471556Srgrimes cmdputs("while "); 11481556Srgrimes goto until; 11491556Srgrimes case NUNTIL: 11501556Srgrimes cmdputs("until "); 11511556Srgrimesuntil: 11521556Srgrimes cmdtxt(n->nbinary.ch1); 11531556Srgrimes cmdputs("; do "); 11541556Srgrimes cmdtxt(n->nbinary.ch2); 11551556Srgrimes cmdputs("; done"); 11561556Srgrimes break; 11571556Srgrimes case NFOR: 11581556Srgrimes cmdputs("for "); 11591556Srgrimes cmdputs(n->nfor.var); 11601556Srgrimes cmdputs(" in ..."); 11611556Srgrimes break; 11621556Srgrimes case NCASE: 11631556Srgrimes cmdputs("case "); 11641556Srgrimes cmdputs(n->ncase.expr->narg.text); 11651556Srgrimes cmdputs(" in ..."); 11661556Srgrimes break; 11671556Srgrimes case NDEFUN: 11681556Srgrimes cmdputs(n->narg.text); 11691556Srgrimes cmdputs("() ..."); 11701556Srgrimes break; 11711556Srgrimes case NCMD: 11721556Srgrimes for (np = n->ncmd.args ; np ; np = np->narg.next) { 11731556Srgrimes cmdtxt(np); 11741556Srgrimes if (np->narg.next) 11751556Srgrimes cmdputs(" "); 11761556Srgrimes } 11771556Srgrimes for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { 11781556Srgrimes cmdputs(" "); 11791556Srgrimes cmdtxt(np); 11801556Srgrimes } 11811556Srgrimes break; 11821556Srgrimes case NARG: 11831556Srgrimes cmdputs(n->narg.text); 11841556Srgrimes break; 11851556Srgrimes case NTO: 11861556Srgrimes p = ">"; i = 1; goto redir; 11871556Srgrimes case NAPPEND: 11881556Srgrimes p = ">>"; i = 1; goto redir; 11891556Srgrimes case NTOFD: 11901556Srgrimes p = ">&"; i = 1; goto redir; 119196922Stjr case NCLOBBER: 119296922Stjr p = ">|"; i = 1; goto redir; 11931556Srgrimes case NFROM: 11941556Srgrimes p = "<"; i = 0; goto redir; 119566612Sbrian case NFROMTO: 119666612Sbrian p = "<>"; i = 0; goto redir; 11971556Srgrimes case NFROMFD: 11981556Srgrimes p = "<&"; i = 0; goto redir; 11991556Srgrimesredir: 12001556Srgrimes if (n->nfile.fd != i) { 12011556Srgrimes s[0] = n->nfile.fd + '0'; 12021556Srgrimes s[1] = '\0'; 12031556Srgrimes cmdputs(s); 12041556Srgrimes } 12051556Srgrimes cmdputs(p); 12061556Srgrimes if (n->type == NTOFD || n->type == NFROMFD) { 12071556Srgrimes s[0] = n->ndup.dupfd + '0'; 12081556Srgrimes s[1] = '\0'; 12091556Srgrimes cmdputs(s); 12101556Srgrimes } else { 12111556Srgrimes cmdtxt(n->nfile.fname); 12121556Srgrimes } 12131556Srgrimes break; 12141556Srgrimes case NHERE: 12151556Srgrimes case NXHERE: 12161556Srgrimes cmdputs("<<..."); 12171556Srgrimes break; 12181556Srgrimes default: 12191556Srgrimes cmdputs("???"); 12201556Srgrimes break; 12211556Srgrimes } 12221556Srgrimes} 12231556Srgrimes 12241556Srgrimes 12251556Srgrimes 12261556SrgrimesSTATIC void 122790111Simpcmdputs(char *s) 122890111Simp{ 122925222Ssteve char *p, *q; 123025222Ssteve char c; 12311556Srgrimes int subtype = 0; 12321556Srgrimes 12331556Srgrimes if (cmdnleft <= 0) 12341556Srgrimes return; 12351556Srgrimes p = s; 12361556Srgrimes q = cmdnextc; 12371556Srgrimes while ((c = *p++) != '\0') { 12381556Srgrimes if (c == CTLESC) 12391556Srgrimes *q++ = *p++; 12401556Srgrimes else if (c == CTLVAR) { 12411556Srgrimes *q++ = '$'; 12421556Srgrimes if (--cmdnleft > 0) 12431556Srgrimes *q++ = '{'; 12441556Srgrimes subtype = *p++; 12451556Srgrimes } else if (c == '=' && subtype != 0) { 12461556Srgrimes *q++ = "}-+?="[(subtype & VSTYPE) - VSNORMAL]; 12471556Srgrimes subtype = 0; 12481556Srgrimes } else if (c == CTLENDVAR) { 12491556Srgrimes *q++ = '}'; 125018954Ssteve } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) 12511556Srgrimes cmdnleft++; /* ignore it */ 12521556Srgrimes else 12531556Srgrimes *q++ = c; 12541556Srgrimes if (--cmdnleft <= 0) { 12551556Srgrimes *q++ = '.'; 12561556Srgrimes *q++ = '.'; 12571556Srgrimes *q++ = '.'; 12581556Srgrimes break; 12591556Srgrimes } 12601556Srgrimes } 12611556Srgrimes cmdnextc = q; 12621556Srgrimes} 1263