2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)jobs.c 8.5 (Berkeley) 5/4/95
37 * $FreeBSD: head/bin/sh/jobs.c 248349 2013-03-15 20:29:31Z jilles $
40 #include <sys/ioctl.h>
41 #include <sys/param.h>
42 #include <sys/resource.h>
56 #undef CEOF /* syntax.h redefines this */
77 static struct job *jobtab; /* array of jobs */
78 static int njobs; /* size of array */
79 MKINIT pid_t backgndpid = -1; /* pid of last background process */
80 MKINIT struct job *bgjob = NULL; /* last background process */
82 static struct job *jobmru; /* most recently used job list */
83 static pid_t initialpgrp; /* pgrp of shell on invocation */
85 int in_waitcmd = 0; /* are we in waitcmd()? */
86 volatile sig_atomic_t breakwaitcmd = 0; /* should wait be terminated? */
87 static int ttyfd = -1;
89 /* mode flags for dowait */
90 #define DOWAIT_BLOCK 0x1 /* wait until a child exits */
91 #define DOWAIT_SIG 0x2 /* if DOWAIT_BLOCK, abort on signals */
94 static void restartjob(struct job *);
96 static void freejob(struct job *);
97 static struct job *getjob(char *);
98 static pid_t dowait(int, struct job *);
99 static void checkzombies(void);
100 static void cmdtxt(union node *);
101 static void cmdputs(const char *);
103 static void setcurjob(struct job *);
104 static void deljob(struct job *);
105 static struct job *getcurjob(struct job *);
107 static void printjobcmd(struct job *);
108 static void showjob(struct job *, int);
112 * Turn job control on and off.
123 if (on == jobctl || rootshell == 0)
128 if ((ttyfd = open(_PATH_TTY, O_RDWR)) < 0) {
130 while (i <= 2 && !isatty(i))
132 if (i > 2 || (ttyfd = fcntl(i, F_DUPFD, 10)) < 0)
137 * Keep our TTY file descriptor out of the way of
138 * the user's redirections.
140 if ((i = fcntl(ttyfd, F_DUPFD, 10)) < 0) {
148 if (fcntl(ttyfd, F_SETFD, FD_CLOEXEC) < 0) {
153 do { /* while we are in the background */
154 initialpgrp = tcgetpgrp(ttyfd);
155 if (initialpgrp < 0) {
156 out: out2fmt_flush("sh: can't access tty; job control turned off\n");
160 if (initialpgrp != getpgrp()) {
169 tcsetpgrp(ttyfd, rootpid);
170 } else { /* turning job control off */
171 setpgid(0, initialpgrp);
172 tcsetpgrp(ttyfd, initialpgrp);
186 fgcmd(int argc __unused, char **argv)
192 jp = getjob(argv[1]);
194 error("job not created under job control");
197 pgrp = jp->ps[0].pid;
198 tcsetpgrp(ttyfd, pgrp);
202 status = waitforjob(jp, NULL);
209 bgcmd(int argc, char **argv)
214 jp = getjob(*++argv);
216 error("job not created under job control");
217 if (jp->state == JOBDONE)
221 out1fmt("[%td] ", jp - jobtab + 1);
223 } while (--argc > 1);
229 restartjob(struct job *jp)
234 if (jp->state == JOBDONE)
238 kill(-jp->ps[0].pid, SIGCONT);
239 for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) {
240 if (WIFSTOPPED(ps->status)) {
251 jobscmd(int argc __unused, char *argv[] __unused)
256 mode = SHOWJOBS_DEFAULT;
257 while ((ch = nextopt("lps")) != '\0') {
260 mode = SHOWJOBS_VERBOSE;
263 mode = SHOWJOBS_PGIDS;
266 mode = SHOWJOBS_PIDS;
274 while ((id = *argptr++) != NULL)
275 showjob(getjob(id), mode);
281 printjobcmd(struct job *jp)
286 for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) {
295 showjob(struct job *jp, int mode)
302 int col, curr, i, jobno, prev, procno;
305 procno = (mode == SHOWJOBS_PGIDS) ? 1 : jp->nprocs;
306 jobno = jp - jobtab + 1;
309 if ((j = getcurjob(NULL)) != NULL) {
310 curr = j - jobtab + 1;
311 if ((j = getcurjob(j)) != NULL)
312 prev = j - jobtab + 1;
315 ps = jp->ps + jp->nprocs - 1;
316 if (jp->state == 0) {
317 strcpy(statestr, "Running");
319 } else if (jp->state == JOBSTOPPED) {
320 while (!WIFSTOPPED(ps->status) && ps > jp->ps)
322 if (WIFSTOPPED(ps->status))
323 i = WSTOPSIG(ps->status);
326 sigstr = strsignal(i);
328 strcpy(statestr, sigstr);
330 strcpy(statestr, "Suspended");
332 } else if (WIFEXITED(ps->status)) {
333 if (WEXITSTATUS(ps->status) == 0)
334 strcpy(statestr, "Done");
336 fmtstr(statestr, 64, "Done(%d)",
337 WEXITSTATUS(ps->status));
339 i = WTERMSIG(ps->status);
340 sigstr = strsignal(i);
342 strcpy(statestr, sigstr);
344 strcpy(statestr, "Unknown signal");
345 if (WCOREDUMP(ps->status))
346 strcat(statestr, " (core dumped)");
349 for (ps = jp->ps ; ; ps++) { /* for each process */
350 if (mode == SHOWJOBS_PIDS || mode == SHOWJOBS_PGIDS) {
351 out1fmt("%d\n", (int)ps->pid);
354 if (mode != SHOWJOBS_VERBOSE && ps != jp->ps)
356 if (jobno == curr && ps == jp->ps)
358 else if (jobno == prev && ps == jp->ps)
363 fmtstr(s, 64, "[%d] %c ", jobno, c);
365 fmtstr(s, 64, " %c ", c);
368 if (mode == SHOWJOBS_VERBOSE) {
369 fmtstr(s, 64, "%d ", (int)ps->pid);
375 col += strlen(statestr);
381 if (mode == SHOWJOBS_VERBOSE) {
386 skip: if (--procno <= 0)
392 * Print a list of jobs. If "change" is nonzero, only print jobs whose
393 * statuses have changed since the last call to showjobs.
395 * If the shell is interrupted in the process of creating a job, the
396 * result may be a job structure containing zero processes. Such structures
397 * will be freed here.
401 showjobs(int change, int mode)
406 TRACE(("showjobs(%d) called\n", change));
408 for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) {
411 if (jp->nprocs == 0) {
415 if (change && ! jp->changed)
419 /* Hack: discard jobs for which $! has not been referenced
420 * in interactive mode when they terminate.
422 if (jp->state == JOBDONE && !jp->remembered &&
423 (iflag || jp != bgjob)) {
431 * Mark a job structure as unused.
435 freejob(struct job *jp)
443 for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) {
444 if (ps->cmd != nullstr)
447 if (jp->ps != &jp->ps0)
459 waitcmd(int argc, char **argv)
466 job = getjob(argv[1]);
472 * Loop until a process is terminated or stopped, or a SIGINT is
480 status = job->ps[job->nprocs - 1].status;
481 if (WIFEXITED(status))
482 retval = WEXITSTATUS(status);
484 else if (WIFSTOPPED(status))
485 retval = WSTOPSIG(status) + 128;
488 retval = WTERMSIG(status) + 128;
489 if (! iflag || ! job->changed)
500 for (jp = jobtab ; jp < jobtab + njobs; jp++)
501 if (jp->used && jp->state == JOBDONE) {
502 if (! iflag || ! jp->changed)
510 for (jp = jobtab ; ; jp++) {
511 if (jp >= jobtab + njobs) { /* no running procs */
515 if (jp->used && jp->state == 0)
519 } while (dowait(DOWAIT_BLOCK | DOWAIT_SIG, NULL) != -1);
522 return pendingsig + 128;
528 jobidcmd(int argc __unused, char **argv)
533 jp = getjob(argv[1]);
534 for (i = 0 ; i < jp->nprocs ; ) {
535 out1fmt("%d", (int)jp->ps[i].pid);
536 out1c(++i < jp->nprocs? ' ' : '\n');
544 * Convert a job name to a job structure.
551 struct job *found, *jp;
557 currentjob: if ((jp = getcurjob(NULL)) == NULL)
558 error("No current job");
561 error("No current job");
563 } else if (name[0] == '%') {
564 if (is_digit(name[1])) {
565 jobno = number(name + 1);
566 if (jobno > 0 && jobno <= njobs
567 && jobtab[jobno - 1].used != 0)
568 return &jobtab[jobno - 1];
570 } else if (name[1] == '%' && name[2] == '\0') {
572 } else if (name[1] == '+' && name[2] == '\0') {
574 } else if (name[1] == '-' && name[2] == '\0') {
575 if ((jp = getcurjob(NULL)) == NULL ||
576 (jp = getcurjob(jp)) == NULL)
577 error("No previous job");
580 } else if (name[1] == '?') {
582 for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) {
583 if (jp->used && jp->nprocs > 0
584 && strstr(jp->ps[0].cmd, name + 2) != NULL) {
586 error("%s: ambiguous", name);
594 for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) {
595 if (jp->used && jp->nprocs > 0
596 && prefix(name + 1, jp->ps[0].cmd)) {
598 error("%s: ambiguous", name);
605 } else if (is_number(name)) {
606 pid = (pid_t)number(name);
607 for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) {
608 if (jp->used && jp->nprocs > 0
609 && jp->ps[jp->nprocs - 1].pid == pid)
613 error("No such job: %s", name);
620 getjobpgrp(char *name)
625 return -jp->ps[0].pid;
629 * Return a new job structure,
633 makejob(union node *node __unused, int nprocs)
638 for (i = njobs, jp = jobtab ; ; jp++) {
642 jobtab = ckmalloc(4 * sizeof jobtab[0]);
647 jp = ckmalloc((njobs + 4) * sizeof jobtab[0]);
648 memcpy(jp, jobtab, njobs * sizeof jp[0]);
650 /* Relocate `next' pointers and list head */
652 jobmru = &jp[jobmru - jobtab];
653 for (i = 0; i < njobs; i++)
654 if (jp[i].next != NULL)
655 jp[i].next = &jp[jp[i].next -
659 bgjob = &jp[bgjob - jobtab];
660 /* Relocate `ps' pointers */
661 for (i = 0; i < njobs; i++)
662 if (jp[i].ps == &jobtab[i].ps0)
663 jp[i].ps = &jp[i].ps0;
668 for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0);
687 jp->ps = ckmalloc(nprocs * sizeof (struct procstat));
692 TRACE(("makejob(%p, %d) returns %%%td\n", (void *)node, nprocs,
699 setcurjob(struct job *cj)
701 struct job *jp, *prev;
703 for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) {
706 prev->next = jp->next;
719 deljob(struct job *j)
721 struct job *jp, *prev;
723 for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) {
726 prev->next = jp->next;
735 * Return the most recently used job that isn't `nj', and preferably one
739 getcurjob(struct job *nj)
743 /* Try to find a stopped one.. */
744 for (jp = jobmru; jp != NULL; jp = jp->next)
745 if (jp->used && jp != nj && jp->state == JOBSTOPPED)
747 /* Otherwise the most recently used job that isn't `nj' */
748 for (jp = jobmru; jp != NULL; jp = jp->next)
749 if (jp->used && jp != nj)
758 * Fork of a subshell. If we are doing job control, give the subshell its
759 * own process group. Jp is a job structure that the job is to be added to.
760 * N is the command that will be evaluated by the child. Both jp and n may
761 * be NULL. The mode parameter can be one of the following:
762 * FORK_FG - Fork off a foreground process.
763 * FORK_BG - Fork off a background process.
764 * FORK_NOJOB - Like FORK_FG, but don't give the process its own
765 * process group even if job control is on.
767 * When job control is turned off, background processes have their standard
768 * input redirected to /dev/null (except for the second and later processes
773 forkshell(struct job *jp, union node *n, int mode)
778 TRACE(("forkshell(%%%td, %p, %d) called\n", jp - jobtab, (void *)n,
781 if (mode == FORK_BG && (jp == NULL || jp->nprocs == 0))
786 TRACE(("Fork failed, errno=%d\n", errno));
788 error("Cannot fork: %s", strerror(errno));
795 TRACE(("Child shell %d\n", (int)getpid()));
798 handler = &main_handler;
804 jobctl = 0; /* do job control only in root shell */
805 if (wasroot && mode != FORK_NOJOB && mflag) {
806 if (jp == NULL || jp->nprocs == 0)
809 pgrp = jp->ps[0].pid;
810 if (setpgid(0, pgrp) == 0 && mode == FORK_FG) {
811 /*** this causes superfluous TIOCSPGRPS ***/
812 if (tcsetpgrp(ttyfd, pgrp) < 0)
813 error("tcsetpgrp failed, errno=%d", errno);
817 } else if (mode == FORK_BG) {
820 if ((jp == NULL || jp->nprocs == 0) &&
821 ! fd0_redirected_p ()) {
823 if (open(_PATH_DEVNULL, O_RDONLY) != 0)
824 error("cannot open %s: %s",
825 _PATH_DEVNULL, strerror(errno));
829 if (mode == FORK_BG) {
832 if ((jp == NULL || jp->nprocs == 0) &&
833 ! fd0_redirected_p ()) {
835 if (open(_PATH_DEVNULL, O_RDONLY) != 0)
836 error("cannot open %s: %s",
837 _PATH_DEVNULL, strerror(errno));
842 for (i = njobs, p = jobtab ; --i >= 0 ; p++)
846 if (wasroot && iflag) {
853 if (rootshell && mode != FORK_NOJOB && mflag) {
854 if (jp == NULL || jp->nprocs == 0)
857 pgrp = jp->ps[0].pid;
860 if (mode == FORK_BG) {
861 if (bgjob != NULL && bgjob->state == JOBDONE &&
862 !bgjob->remembered && !iflag)
864 backgndpid = pid; /* set $! */
868 struct procstat *ps = &jp->ps[jp->nprocs++];
872 if (iflag && rootshell && n)
873 ps->cmd = commandtext(n);
874 jp->foreground = mode == FORK_FG;
880 TRACE(("In parent shell: child = %d\n", (int)pid));
886 vforkexecshell(struct job *jp, char **argv, char **envp, const char *path, int idx, int pip[2])
889 struct jmploc jmploc;
890 struct jmploc *savehandler;
892 TRACE(("vforkexecshell(%%%td, %s, %p) called\n", jp - jobtab, argv[0],
896 savehandler = handler;
899 TRACE(("Vfork failed, errno=%d\n", errno));
901 error("Cannot fork: %s", strerror(errno));
904 TRACE(("Child shell %d\n", (int)getpid()));
905 if (setjmp(jmploc.loc))
906 _exit(exception == EXEXEC ? exerrno : 2);
915 shellexec(argv, envp, path, idx);
917 handler = savehandler;
919 struct procstat *ps = &jp->ps[jp->nprocs++];
929 TRACE(("In parent shell: child = %d\n", (int)pid));
935 * Wait for job to finish.
937 * Under job control we have the problem that while a child process is
938 * running interrupts generated by the user are sent to the child but not
939 * to the shell. This means that an infinite loop started by an inter-
940 * active user may be hard to kill. With job control turned off, an
941 * interactive user may place an interactive program inside a loop. If
942 * the interactive program catches interrupts, the user doesn't want
943 * these interrupts to also abort the loop. The approach we take here
944 * is to have the shell ignore interrupt signals while waiting for a
945 * foreground process to terminate, and then send itself an interrupt
946 * signal if the child process was terminated by an interrupt signal.
947 * Unfortunately, some programs want to do a bit of cleanup and then
948 * exit on interrupt; unless these processes terminate themselves by
949 * sending a signal to themselves (instead of calling exit) they will
950 * confuse this approach.
954 waitforjob(struct job *jp, int *origstatus)
957 pid_t mypgrp = getpgrp();
958 int propagate_int = jp->jobctl && jp->foreground;
964 TRACE(("waitforjob(%%%td) called\n", jp - jobtab + 1));
965 while (jp->state == 0)
966 if (dowait(DOWAIT_BLOCK | (Tflag ? DOWAIT_SIG : 0), jp) == -1)
970 if (tcsetpgrp(ttyfd, mypgrp) < 0)
971 error("tcsetpgrp failed, errno=%d\n", errno);
973 if (jp->state == JOBSTOPPED)
976 status = jp->ps[jp->nprocs - 1].status;
977 if (origstatus != NULL)
978 *origstatus = status;
979 /* convert to 8 bits */
980 if (WIFEXITED(status))
981 st = WEXITSTATUS(status);
983 else if (WIFSTOPPED(status))
984 st = WSTOPSIG(status) + 128;
987 st = WTERMSIG(status) + 128;
988 if (! JOBS || jp->state == JOBDONE)
991 if (!WIFSIGNALED(status) || WTERMSIG(status) != SIGINT)
995 else if (rootshell && iflag && propagate_int &&
996 WIFSIGNALED(status) && WTERMSIG(status) == SIGINT)
997 kill(getpid(), SIGINT);
1005 dummy_handler(int sig __unused)
1010 * Wait for a process to terminate.
1014 dowait(int mode, struct job *job)
1016 struct sigaction sa, osa;
1017 sigset_t mask, omask;
1020 struct procstat *sp;
1022 struct job *thisjob;
1029 int restore_sigchld;
1031 TRACE(("dowait(%d, %p) called\n", mode, job));
1032 restore_sigchld = 0;
1033 if ((mode & DOWAIT_SIG) != 0) {
1035 sigprocmask(SIG_BLOCK, &mask, &omask);
1037 if (!issigchldtrapped()) {
1038 restore_sigchld = 1;
1039 sa.sa_handler = dummy_handler;
1041 sigemptyset(&sa.sa_mask);
1042 sigaction(SIGCHLD, &sa, &osa);
1048 wflags = WUNTRACED | WCONTINUED;
1052 if ((mode & (DOWAIT_BLOCK | DOWAIT_SIG)) != DOWAIT_BLOCK)
1054 pid = wait3(&status, wflags, NULL);
1055 TRACE(("wait returns %d, status=%d\n", (int)pid, status));
1056 if (pid == 0 && (mode & DOWAIT_SIG) != 0) {
1062 } while (pid == -1 && errno == EINTR && breakwaitcmd == 0);
1063 if (pid == -1 && errno == ECHILD && job != NULL)
1064 job->state = JOBDONE;
1065 if ((mode & DOWAIT_SIG) != 0) {
1066 if (restore_sigchld)
1067 sigaction(SIGCHLD, &osa, NULL);
1068 sigprocmask(SIG_SETMASK, &omask, NULL);
1071 if (breakwaitcmd != 0) {
1074 * Do not early terminate if the pid is positive, else the
1075 * job will not be properly recorded.
1084 for (jp = jobtab ; jp < jobtab + njobs ; jp++) {
1085 if (jp->used && jp->nprocs > 0) {
1088 for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) {
1091 if (sp->pid == pid) {
1092 TRACE(("Changing status of proc %d from 0x%x to 0x%x\n",
1093 (int)pid, sp->status,
1095 if (WIFCONTINUED(status)) {
1099 sp->status = status;
1102 if (sp->status == -1)
1104 else if (WIFSTOPPED(sp->status))
1107 if (stopped) { /* stopped or done */
1108 int state = done? JOBDONE : JOBSTOPPED;
1109 if (jp->state != state) {
1110 TRACE(("Job %td: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state));
1113 if (done && !jp->remembered &&
1114 !iflag && jp != bgjob)
1126 if (!thisjob || thisjob->state == 0)
1128 else if ((!rootshell || !iflag || thisjob == job) &&
1129 thisjob->foreground && thisjob->state != JOBSTOPPED) {
1132 for (sp = thisjob->ps; sp < thisjob->ps + thisjob->nprocs; sp++)
1133 if (WIFSIGNALED(sp->status)) {
1134 sig = WTERMSIG(sp->status);
1135 coredump = WCOREDUMP(sp->status);
1137 if (sig > 0 && sig != SIGINT && sig != SIGPIPE) {
1138 sigstr = strsignal(sig);
1142 out2str("Unknown signal");
1144 out2str(" (core dumped)");
1149 TRACE(("Not printing status, rootshell=%d, job=%p\n", rootshell, job));
1150 thisjob->changed = 1;
1158 * return 1 if there are stopped jobs, otherwise 0
1160 int job_warning = 0;
1169 for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) {
1172 if (jp->state == JOBSTOPPED) {
1173 out2fmt_flush("You have stopped jobs.\n");
1186 while (njobs > 0 && dowait(0, NULL) > 0)
1194 return backgndpid != -1;
1201 if (bgjob != NULL && !forcelocal)
1202 bgjob->remembered = 1;
1207 * Return a string identifying a command (to be printed by the
1211 static char *cmdnextc;
1212 static int cmdnleft;
1213 #define MAXCMDTEXT 200
1216 commandtext(union node *n)
1220 cmdnextc = name = ckmalloc(MAXCMDTEXT);
1221 cmdnleft = MAXCMDTEXT - 4;
1229 cmdtxt(union node *n)
1232 struct nodelist *lp;
1241 cmdtxt(n->nbinary.ch1);
1243 cmdtxt(n->nbinary.ch2);
1246 cmdtxt(n->nbinary.ch1);
1248 cmdtxt(n->nbinary.ch2);
1251 cmdtxt(n->nbinary.ch1);
1253 cmdtxt(n->nbinary.ch2);
1256 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
1264 cmdtxt(n->nredir.n);
1269 cmdtxt(n->nredir.n);
1273 cmdtxt(n->nif.test);
1275 cmdtxt(n->nif.ifpart);
1284 cmdtxt(n->nbinary.ch1);
1286 cmdtxt(n->nbinary.ch2);
1291 cmdputs(n->nfor.var);
1296 cmdputs(n->ncase.expr->narg.text);
1300 cmdputs(n->narg.text);
1305 cmdtxt(n->nnot.com);
1308 for (np = n->ncmd.args ; np ; np = np->narg.next) {
1313 for (np = n->ncmd.redirect ; np ; np = np->nfile.next) {
1319 cmdputs(n->narg.text);
1322 p = ">"; i = 1; goto redir;
1324 p = ">>"; i = 1; goto redir;
1326 p = ">&"; i = 1; goto redir;
1328 p = ">|"; i = 1; goto redir;
1330 p = "<"; i = 0; goto redir;
1332 p = "<>"; i = 0; goto redir;
1334 p = "<&"; i = 0; goto redir;
1336 if (n->nfile.fd != i) {
1337 s[0] = n->nfile.fd + '0';
1342 if (n->type == NTOFD || n->type == NFROMFD) {
1343 if (n->ndup.dupfd >= 0)
1344 s[0] = n->ndup.dupfd + '0';
1350 cmdtxt(n->nfile.fname);
1366 cmdputs(const char *s)
1377 while ((c = *p++) != '\0') {
1380 else if (c == CTLVAR) {
1385 if ((subtype & VSTYPE) == VSLENGTH && --cmdnleft > 0)
1387 } else if (c == '=' && subtype != 0) {
1388 *q = "}-+?=##%%\0X"[(subtype & VSTYPE) - VSNORMAL];
1393 if (((subtype & VSTYPE) == VSTRIMLEFTMAX ||
1394 (subtype & VSTYPE) == VSTRIMRIGHTMAX) &&
1398 } else if (c == CTLENDVAR) {
1400 } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) {
1410 } else if (c == CTLARI) {
1418 } else if (c == CTLENDARI) {
1419 if (--cmdnleft > 0) {
1423 } else if (c == CTLQUOTEMARK || c == CTLQUOTEEND)
1424 cmdnleft++; /* ignore */
1427 if (--cmdnleft <= 0) {