Commit | Line | Data |
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984263bc MD |
1 | /*- |
2 | * Copyright (c) 1991, 1993 | |
3 | * The Regents of the University of California. All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Kenneth Almquist. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
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. | |
23 | * | |
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 | |
34 | * SUCH DAMAGE. | |
1de703da MD |
35 | * |
36 | * @(#)jobs.c 8.5 (Berkeley) 5/4/95 | |
f893ef22 | 37 | * $FreeBSD: src/bin/sh/jobs.c,v 1.93 2011/06/04 15:05:52 jilles Exp $ |
984263bc MD |
38 | */ |
39 | ||
99512ac4 | 40 | #include <sys/ioctl.h> |
984263bc | 41 | #include <sys/param.h> |
984263bc | 42 | #include <sys/resource.h> |
99512ac4 PA |
43 | #include <sys/time.h> |
44 | #include <sys/wait.h> | |
45 | #include <errno.h> | |
46 | #include <fcntl.h> | |
984263bc | 47 | #include <paths.h> |
99512ac4 PA |
48 | #include <signal.h> |
49 | #include <stddef.h> | |
50 | #include <stdlib.h> | |
51 | #include <unistd.h> | |
984263bc MD |
52 | |
53 | #include "shell.h" | |
54 | #if JOBS | |
55 | #include <termios.h> | |
56 | #undef CEOF /* syntax.h redefines this */ | |
57 | #endif | |
58 | #include "redir.h" | |
59 | #include "show.h" | |
60 | #include "main.h" | |
61 | #include "parser.h" | |
62 | #include "nodes.h" | |
63 | #include "jobs.h" | |
64 | #include "options.h" | |
65 | #include "trap.h" | |
66 | #include "syntax.h" | |
67 | #include "input.h" | |
68 | #include "output.h" | |
69 | #include "memalloc.h" | |
70 | #include "error.h" | |
71 | #include "mystring.h" | |
72 | ||
73 | ||
99512ac4 PA |
74 | static struct job *jobtab; /* array of jobs */ |
75 | static int njobs; /* size of array */ | |
984263bc | 76 | MKINIT pid_t backgndpid = -1; /* pid of last background process */ |
99512ac4 | 77 | MKINIT struct job *bgjob = NULL; /* last background process */ |
984263bc | 78 | #if JOBS |
99512ac4 PA |
79 | static struct job *jobmru; /* most recently used job list */ |
80 | static pid_t initialpgrp; /* pgrp of shell on invocation */ | |
984263bc MD |
81 | #endif |
82 | int in_waitcmd = 0; /* are we in waitcmd()? */ | |
83 | int in_dowait = 0; /* are we in dowait()? */ | |
84 | volatile sig_atomic_t breakwaitcmd = 0; /* should wait be terminated? */ | |
85 | static int ttyfd = -1; | |
86 | ||
87 | #if JOBS | |
99512ac4 | 88 | static void restartjob(struct job *); |
984263bc | 89 | #endif |
99512ac4 PA |
90 | static void freejob(struct job *); |
91 | static struct job *getjob(char *); | |
92 | static pid_t dowait(int, struct job *); | |
93 | static pid_t waitproc(int, int *); | |
94 | static void checkzombies(void); | |
95 | static void cmdtxt(union node *); | |
96 | static void cmdputs(const char *); | |
984263bc | 97 | #if JOBS |
99512ac4 PA |
98 | static void setcurjob(struct job *); |
99 | static void deljob(struct job *); | |
100 | static struct job *getcurjob(struct job *); | |
984263bc | 101 | #endif |
99512ac4 PA |
102 | static void printjobcmd(struct job *); |
103 | static void showjob(struct job *, int); | |
984263bc MD |
104 | |
105 | ||
106 | /* | |
107 | * Turn job control on and off. | |
108 | */ | |
109 | ||
110 | MKINIT int jobctl; | |
111 | ||
112 | #if JOBS | |
113 | void | |
114 | setjobctl(int on) | |
115 | { | |
116 | int i; | |
117 | ||
118 | if (on == jobctl || rootshell == 0) | |
119 | return; | |
120 | if (on) { | |
121 | if (ttyfd != -1) | |
122 | close(ttyfd); | |
123 | if ((ttyfd = open(_PATH_TTY, O_RDWR)) < 0) { | |
124 | i = 0; | |
125 | while (i <= 2 && !isatty(i)) | |
126 | i++; | |
127 | if (i > 2 || (ttyfd = fcntl(i, F_DUPFD, 10)) < 0) | |
128 | goto out; | |
129 | } | |
130 | if (ttyfd < 10) { | |
131 | /* | |
132 | * Keep our TTY file descriptor out of the way of | |
133 | * the user's redirections. | |
134 | */ | |
135 | if ((i = fcntl(ttyfd, F_DUPFD, 10)) < 0) { | |
136 | close(ttyfd); | |
137 | ttyfd = -1; | |
138 | goto out; | |
139 | } | |
140 | close(ttyfd); | |
141 | ttyfd = i; | |
142 | } | |
143 | if (fcntl(ttyfd, F_SETFD, FD_CLOEXEC) < 0) { | |
144 | close(ttyfd); | |
145 | ttyfd = -1; | |
146 | goto out; | |
147 | } | |
148 | do { /* while we are in the background */ | |
149 | initialpgrp = tcgetpgrp(ttyfd); | |
150 | if (initialpgrp < 0) { | |
99512ac4 | 151 | out: out2fmt_flush("sh: can't access tty; job control turned off\n"); |
984263bc MD |
152 | mflag = 0; |
153 | return; | |
154 | } | |
99512ac4 PA |
155 | if (initialpgrp != getpgrp()) { |
156 | kill(0, SIGTTIN); | |
984263bc MD |
157 | continue; |
158 | } | |
159 | } while (0); | |
160 | setsignal(SIGTSTP); | |
161 | setsignal(SIGTTOU); | |
162 | setsignal(SIGTTIN); | |
163 | setpgid(0, rootpid); | |
164 | tcsetpgrp(ttyfd, rootpid); | |
165 | } else { /* turning job control off */ | |
166 | setpgid(0, initialpgrp); | |
167 | tcsetpgrp(ttyfd, initialpgrp); | |
168 | close(ttyfd); | |
169 | ttyfd = -1; | |
170 | setsignal(SIGTSTP); | |
171 | setsignal(SIGTTOU); | |
172 | setsignal(SIGTTIN); | |
173 | } | |
174 | jobctl = on; | |
175 | } | |
176 | #endif | |
177 | ||
178 | ||
984263bc MD |
179 | #if JOBS |
180 | int | |
181 | fgcmd(int argc __unused, char **argv) | |
182 | { | |
183 | struct job *jp; | |
184 | pid_t pgrp; | |
185 | int status; | |
186 | ||
187 | jp = getjob(argv[1]); | |
188 | if (jp->jobctl == 0) | |
189 | error("job not created under job control"); | |
99512ac4 | 190 | printjobcmd(jp); |
984263bc MD |
191 | flushout(&output); |
192 | pgrp = jp->ps[0].pid; | |
193 | tcsetpgrp(ttyfd, pgrp); | |
194 | restartjob(jp); | |
195 | jp->foreground = 1; | |
196 | INTOFF; | |
2038fb68 | 197 | status = waitforjob(jp, NULL); |
984263bc MD |
198 | INTON; |
199 | return status; | |
200 | } | |
201 | ||
202 | ||
203 | int | |
204 | bgcmd(int argc, char **argv) | |
205 | { | |
984263bc MD |
206 | struct job *jp; |
207 | ||
208 | do { | |
209 | jp = getjob(*++argv); | |
210 | if (jp->jobctl == 0) | |
211 | error("job not created under job control"); | |
212 | if (jp->state == JOBDONE) | |
213 | continue; | |
214 | restartjob(jp); | |
215 | jp->foreground = 0; | |
99512ac4 PA |
216 | out1fmt("[%td] ", jp - jobtab + 1); |
217 | printjobcmd(jp); | |
984263bc MD |
218 | } while (--argc > 1); |
219 | return 0; | |
220 | } | |
221 | ||
222 | ||
99512ac4 | 223 | static void |
984263bc MD |
224 | restartjob(struct job *jp) |
225 | { | |
226 | struct procstat *ps; | |
227 | int i; | |
228 | ||
229 | if (jp->state == JOBDONE) | |
230 | return; | |
231 | setcurjob(jp); | |
232 | INTOFF; | |
99512ac4 | 233 | kill(-jp->ps[0].pid, SIGCONT); |
984263bc MD |
234 | for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { |
235 | if (WIFSTOPPED(ps->status)) { | |
236 | ps->status = -1; | |
237 | jp->state = 0; | |
238 | } | |
239 | } | |
240 | INTON; | |
241 | } | |
242 | #endif | |
243 | ||
244 | ||
245 | int | |
246 | jobscmd(int argc, char *argv[]) | |
247 | { | |
248 | char *id; | |
9d7989de | 249 | int ch, mode; |
984263bc MD |
250 | |
251 | optind = optreset = 1; | |
252 | opterr = 0; | |
9d7989de PA |
253 | mode = SHOWJOBS_DEFAULT; |
254 | while ((ch = getopt(argc, argv, "lps")) != -1) { | |
984263bc MD |
255 | switch (ch) { |
256 | case 'l': | |
9d7989de PA |
257 | mode = SHOWJOBS_VERBOSE; |
258 | break; | |
259 | case 'p': | |
260 | mode = SHOWJOBS_PGIDS; | |
984263bc MD |
261 | break; |
262 | case 's': | |
9d7989de | 263 | mode = SHOWJOBS_PIDS; |
984263bc MD |
264 | break; |
265 | case '?': | |
266 | default: | |
267 | error("unknown option: -%c", optopt); | |
268 | } | |
269 | } | |
270 | argc -= optind; | |
271 | argv += optind; | |
272 | ||
273 | if (argc == 0) | |
9d7989de | 274 | showjobs(0, mode); |
984263bc MD |
275 | else |
276 | while ((id = *argv++) != NULL) | |
99512ac4 | 277 | showjob(getjob(id), mode); |
984263bc MD |
278 | |
279 | return (0); | |
280 | } | |
281 | ||
99512ac4 PA |
282 | static void |
283 | printjobcmd(struct job *jp) | |
284 | { | |
285 | struct procstat *ps; | |
286 | int i; | |
287 | ||
288 | for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) { | |
289 | out1str(ps->cmd); | |
290 | if (i > 0) | |
291 | out1str(" | "); | |
292 | } | |
293 | out1c('\n'); | |
294 | } | |
295 | ||
296 | static void | |
297 | showjob(struct job *jp, int mode) | |
984263bc MD |
298 | { |
299 | char s[64]; | |
99512ac4 | 300 | char statestr[64]; |
984263bc MD |
301 | struct procstat *ps; |
302 | struct job *j; | |
303 | int col, curr, i, jobno, prev, procno; | |
304 | char c; | |
305 | ||
9d7989de | 306 | procno = (mode == SHOWJOBS_PGIDS) ? 1 : jp->nprocs; |
984263bc MD |
307 | jobno = jp - jobtab + 1; |
308 | curr = prev = 0; | |
309 | #if JOBS | |
310 | if ((j = getcurjob(NULL)) != NULL) { | |
311 | curr = j - jobtab + 1; | |
312 | if ((j = getcurjob(j)) != NULL) | |
313 | prev = j - jobtab + 1; | |
314 | } | |
315 | #endif | |
99512ac4 PA |
316 | ps = jp->ps + jp->nprocs - 1; |
317 | if (jp->state == 0) { | |
318 | strcpy(statestr, "Running"); | |
319 | #if JOBS | |
320 | } else if (jp->state == JOBSTOPPED) { | |
321 | while (!WIFSTOPPED(ps->status) && ps > jp->ps) | |
322 | ps--; | |
323 | if (WIFSTOPPED(ps->status)) | |
324 | i = WSTOPSIG(ps->status); | |
325 | else | |
326 | i = -1; | |
327 | if (i > 0 && i < sys_nsig && sys_siglist[i]) | |
328 | strcpy(statestr, sys_siglist[i]); | |
329 | else | |
330 | strcpy(statestr, "Suspended"); | |
331 | #endif | |
332 | } else if (WIFEXITED(ps->status)) { | |
333 | if (WEXITSTATUS(ps->status) == 0) | |
334 | strcpy(statestr, "Done"); | |
335 | else | |
336 | fmtstr(statestr, 64, "Done(%d)", | |
337 | WEXITSTATUS(ps->status)); | |
338 | } else { | |
339 | i = WTERMSIG(ps->status); | |
340 | if (i > 0 && i < sys_nsig && sys_siglist[i]) | |
341 | strcpy(statestr, sys_siglist[i]); | |
342 | else | |
343 | fmtstr(statestr, 64, "Signal %d", i); | |
344 | if (WCOREDUMP(ps->status)) | |
345 | strcat(statestr, " (core dumped)"); | |
346 | } | |
347 | ||
984263bc | 348 | for (ps = jp->ps ; ; ps++) { /* for each process */ |
9d7989de | 349 | if (mode == SHOWJOBS_PIDS || mode == SHOWJOBS_PGIDS) { |
99512ac4 | 350 | out1fmt("%d\n", (int)ps->pid); |
984263bc MD |
351 | goto skip; |
352 | } | |
99512ac4 | 353 | if (mode != SHOWJOBS_VERBOSE && ps != jp->ps) |
984263bc MD |
354 | goto skip; |
355 | if (jobno == curr && ps == jp->ps) | |
356 | c = '+'; | |
357 | else if (jobno == prev && ps == jp->ps) | |
358 | c = '-'; | |
359 | else | |
360 | c = ' '; | |
361 | if (ps == jp->ps) | |
362 | fmtstr(s, 64, "[%d] %c ", jobno, c); | |
363 | else | |
364 | fmtstr(s, 64, " %c ", c); | |
365 | out1str(s); | |
366 | col = strlen(s); | |
9d7989de | 367 | if (mode == SHOWJOBS_VERBOSE) { |
984263bc MD |
368 | fmtstr(s, 64, "%d ", (int)ps->pid); |
369 | out1str(s); | |
370 | col += strlen(s); | |
371 | } | |
99512ac4 PA |
372 | if (ps == jp->ps) { |
373 | out1str(statestr); | |
374 | col += strlen(statestr); | |
984263bc | 375 | } |
984263bc MD |
376 | do { |
377 | out1c(' '); | |
378 | col++; | |
379 | } while (col < 30); | |
99512ac4 PA |
380 | if (mode == SHOWJOBS_VERBOSE) { |
381 | out1str(ps->cmd); | |
382 | out1c('\n'); | |
383 | } else | |
384 | printjobcmd(jp); | |
984263bc MD |
385 | skip: if (--procno <= 0) |
386 | break; | |
387 | } | |
388 | } | |
389 | ||
390 | /* | |
391 | * Print a list of jobs. If "change" is nonzero, only print jobs whose | |
392 | * statuses have changed since the last call to showjobs. | |
393 | * | |
394 | * If the shell is interrupted in the process of creating a job, the | |
395 | * result may be a job structure containing zero processes. Such structures | |
396 | * will be freed here. | |
397 | */ | |
398 | ||
399 | void | |
9d7989de | 400 | showjobs(int change, int mode) |
984263bc MD |
401 | { |
402 | int jobno; | |
403 | struct job *jp; | |
404 | ||
405 | TRACE(("showjobs(%d) called\n", change)); | |
99512ac4 | 406 | checkzombies(); |
984263bc MD |
407 | for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) { |
408 | if (! jp->used) | |
409 | continue; | |
410 | if (jp->nprocs == 0) { | |
411 | freejob(jp); | |
412 | continue; | |
413 | } | |
414 | if (change && ! jp->changed) | |
415 | continue; | |
99512ac4 | 416 | showjob(jp, mode); |
984263bc | 417 | jp->changed = 0; |
99512ac4 PA |
418 | /* Hack: discard jobs for which $! has not been referenced |
419 | * in interactive mode when they terminate. | |
420 | */ | |
421 | if (jp->state == JOBDONE && !jp->remembered && | |
422 | (iflag || jp != bgjob)) { | |
984263bc MD |
423 | freejob(jp); |
424 | } | |
425 | } | |
426 | } | |
427 | ||
428 | ||
429 | /* | |
430 | * Mark a job structure as unused. | |
431 | */ | |
432 | ||
99512ac4 | 433 | static void |
984263bc MD |
434 | freejob(struct job *jp) |
435 | { | |
436 | struct procstat *ps; | |
437 | int i; | |
438 | ||
439 | INTOFF; | |
99512ac4 PA |
440 | if (bgjob == jp) |
441 | bgjob = NULL; | |
984263bc MD |
442 | for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) { |
443 | if (ps->cmd != nullstr) | |
444 | ckfree(ps->cmd); | |
445 | } | |
446 | if (jp->ps != &jp->ps0) | |
447 | ckfree(jp->ps); | |
448 | jp->used = 0; | |
449 | #if JOBS | |
450 | deljob(jp); | |
451 | #endif | |
452 | INTON; | |
453 | } | |
454 | ||
455 | ||
456 | ||
457 | int | |
458 | waitcmd(int argc, char **argv) | |
459 | { | |
460 | struct job *job; | |
461 | int status, retval; | |
462 | struct job *jp; | |
463 | ||
464 | if (argc > 1) { | |
465 | job = getjob(argv[1]); | |
466 | } else { | |
467 | job = NULL; | |
468 | } | |
469 | ||
470 | /* | |
471 | * Loop until a process is terminated or stopped, or a SIGINT is | |
472 | * received. | |
473 | */ | |
474 | ||
475 | in_waitcmd++; | |
476 | do { | |
477 | if (job != NULL) { | |
478 | if (job->state) { | |
479 | status = job->ps[job->nprocs - 1].status; | |
480 | if (WIFEXITED(status)) | |
481 | retval = WEXITSTATUS(status); | |
482 | #if JOBS | |
483 | else if (WIFSTOPPED(status)) | |
484 | retval = WSTOPSIG(status) + 128; | |
485 | #endif | |
486 | else | |
487 | retval = WTERMSIG(status) + 128; | |
99512ac4 | 488 | if (! iflag || ! job->changed) |
984263bc | 489 | freejob(job); |
99512ac4 PA |
490 | else { |
491 | job->remembered = 0; | |
492 | if (job == bgjob) | |
493 | bgjob = NULL; | |
494 | } | |
984263bc MD |
495 | in_waitcmd--; |
496 | return retval; | |
497 | } | |
498 | } else { | |
99512ac4 PA |
499 | for (jp = jobtab ; jp < jobtab + njobs; jp++) |
500 | if (jp->used && jp->state == JOBDONE) { | |
501 | if (! iflag || ! jp->changed) | |
502 | freejob(jp); | |
503 | else { | |
504 | jp->remembered = 0; | |
505 | if (jp == bgjob) | |
506 | bgjob = NULL; | |
507 | } | |
508 | } | |
984263bc MD |
509 | for (jp = jobtab ; ; jp++) { |
510 | if (jp >= jobtab + njobs) { /* no running procs */ | |
511 | in_waitcmd--; | |
512 | return 0; | |
513 | } | |
514 | if (jp->used && jp->state == 0) | |
515 | break; | |
516 | } | |
517 | } | |
2038fb68 | 518 | } while (dowait(1, NULL) != -1); |
984263bc MD |
519 | in_waitcmd--; |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
524 | ||
525 | ||
526 | int | |
527 | jobidcmd(int argc __unused, char **argv) | |
528 | { | |
529 | struct job *jp; | |
530 | int i; | |
531 | ||
532 | jp = getjob(argv[1]); | |
533 | for (i = 0 ; i < jp->nprocs ; ) { | |
534 | out1fmt("%d", (int)jp->ps[i].pid); | |
535 | out1c(++i < jp->nprocs? ' ' : '\n'); | |
536 | } | |
537 | return 0; | |
538 | } | |
539 | ||
540 | ||
541 | ||
542 | /* | |
543 | * Convert a job name to a job structure. | |
544 | */ | |
545 | ||
99512ac4 | 546 | static struct job * |
984263bc MD |
547 | getjob(char *name) |
548 | { | |
549 | int jobno; | |
550 | struct job *found, *jp; | |
551 | pid_t pid; | |
552 | int i; | |
553 | ||
554 | if (name == NULL) { | |
555 | #if JOBS | |
556 | currentjob: if ((jp = getcurjob(NULL)) == NULL) | |
557 | error("No current job"); | |
558 | return (jp); | |
559 | #else | |
560 | error("No current job"); | |
561 | #endif | |
562 | } else if (name[0] == '%') { | |
563 | if (is_digit(name[1])) { | |
564 | jobno = number(name + 1); | |
565 | if (jobno > 0 && jobno <= njobs | |
566 | && jobtab[jobno - 1].used != 0) | |
567 | return &jobtab[jobno - 1]; | |
568 | #if JOBS | |
569 | } else if (name[1] == '%' && name[2] == '\0') { | |
570 | goto currentjob; | |
571 | } else if (name[1] == '+' && name[2] == '\0') { | |
572 | goto currentjob; | |
573 | } else if (name[1] == '-' && name[2] == '\0') { | |
574 | if ((jp = getcurjob(NULL)) == NULL || | |
575 | (jp = getcurjob(jp)) == NULL) | |
576 | error("No previous job"); | |
577 | return (jp); | |
578 | #endif | |
579 | } else if (name[1] == '?') { | |
580 | found = NULL; | |
581 | for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { | |
582 | if (jp->used && jp->nprocs > 0 | |
583 | && strstr(jp->ps[0].cmd, name + 2) != NULL) { | |
584 | if (found) | |
585 | error("%s: ambiguous", name); | |
586 | found = jp; | |
587 | } | |
588 | } | |
589 | if (found != NULL) | |
590 | return (found); | |
591 | } else { | |
592 | found = NULL; | |
593 | for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { | |
594 | if (jp->used && jp->nprocs > 0 | |
595 | && prefix(name + 1, jp->ps[0].cmd)) { | |
596 | if (found) | |
597 | error("%s: ambiguous", name); | |
598 | found = jp; | |
599 | } | |
600 | } | |
601 | if (found) | |
602 | return found; | |
603 | } | |
604 | } else if (is_number(name)) { | |
605 | pid = (pid_t)number(name); | |
606 | for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) { | |
607 | if (jp->used && jp->nprocs > 0 | |
608 | && jp->ps[jp->nprocs - 1].pid == pid) | |
609 | return jp; | |
610 | } | |
611 | } | |
612 | error("No such job: %s", name); | |
613 | /*NOTREACHED*/ | |
614 | return NULL; | |
615 | } | |
616 | ||
617 | ||
99512ac4 PA |
618 | pid_t |
619 | getjobpgrp(char *name) | |
620 | { | |
621 | struct job *jp; | |
622 | ||
623 | jp = getjob(name); | |
624 | return -jp->ps[0].pid; | |
625 | } | |
984263bc MD |
626 | |
627 | /* | |
628 | * Return a new job structure, | |
629 | */ | |
630 | ||
631 | struct job * | |
632 | makejob(union node *node __unused, int nprocs) | |
633 | { | |
634 | int i; | |
635 | struct job *jp; | |
636 | ||
637 | for (i = njobs, jp = jobtab ; ; jp++) { | |
638 | if (--i < 0) { | |
639 | INTOFF; | |
640 | if (njobs == 0) { | |
641 | jobtab = ckmalloc(4 * sizeof jobtab[0]); | |
642 | #if JOBS | |
643 | jobmru = NULL; | |
644 | #endif | |
645 | } else { | |
646 | jp = ckmalloc((njobs + 4) * sizeof jobtab[0]); | |
647 | memcpy(jp, jobtab, njobs * sizeof jp[0]); | |
648 | #if JOBS | |
649 | /* Relocate `next' pointers and list head */ | |
650 | if (jobmru != NULL) | |
651 | jobmru = &jp[jobmru - jobtab]; | |
652 | for (i = 0; i < njobs; i++) | |
653 | if (jp[i].next != NULL) | |
654 | jp[i].next = &jp[jp[i].next - | |
655 | jobtab]; | |
656 | #endif | |
99512ac4 PA |
657 | if (bgjob != NULL) |
658 | bgjob = &jp[bgjob - jobtab]; | |
984263bc MD |
659 | /* Relocate `ps' pointers */ |
660 | for (i = 0; i < njobs; i++) | |
661 | if (jp[i].ps == &jobtab[i].ps0) | |
662 | jp[i].ps = &jp[i].ps0; | |
663 | ckfree(jobtab); | |
664 | jobtab = jp; | |
665 | } | |
666 | jp = jobtab + njobs; | |
667 | for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0); | |
668 | INTON; | |
669 | break; | |
670 | } | |
671 | if (jp->used == 0) | |
672 | break; | |
673 | } | |
674 | INTOFF; | |
675 | jp->state = 0; | |
676 | jp->used = 1; | |
677 | jp->changed = 0; | |
678 | jp->nprocs = 0; | |
679 | jp->foreground = 0; | |
99512ac4 | 680 | jp->remembered = 0; |
984263bc MD |
681 | #if JOBS |
682 | jp->jobctl = jobctl; | |
683 | jp->next = NULL; | |
684 | #endif | |
685 | if (nprocs > 1) { | |
686 | jp->ps = ckmalloc(nprocs * sizeof (struct procstat)); | |
687 | } else { | |
688 | jp->ps = &jp->ps0; | |
689 | } | |
690 | INTON; | |
99512ac4 | 691 | TRACE(("makejob(%p, %d) returns %%%td\n", (void *)node, nprocs, |
984263bc MD |
692 | jp - jobtab + 1)); |
693 | return jp; | |
694 | } | |
695 | ||
696 | #if JOBS | |
99512ac4 | 697 | static void |
984263bc MD |
698 | setcurjob(struct job *cj) |
699 | { | |
700 | struct job *jp, *prev; | |
701 | ||
702 | for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { | |
703 | if (jp == cj) { | |
704 | if (prev != NULL) | |
705 | prev->next = jp->next; | |
706 | else | |
707 | jobmru = jp->next; | |
708 | jp->next = jobmru; | |
709 | jobmru = cj; | |
710 | return; | |
711 | } | |
712 | } | |
713 | cj->next = jobmru; | |
714 | jobmru = cj; | |
715 | } | |
716 | ||
99512ac4 | 717 | static void |
984263bc MD |
718 | deljob(struct job *j) |
719 | { | |
720 | struct job *jp, *prev; | |
721 | ||
722 | for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) { | |
723 | if (jp == j) { | |
724 | if (prev != NULL) | |
725 | prev->next = jp->next; | |
726 | else | |
727 | jobmru = jp->next; | |
728 | return; | |
729 | } | |
730 | } | |
731 | } | |
732 | ||
733 | /* | |
734 | * Return the most recently used job that isn't `nj', and preferably one | |
735 | * that is stopped. | |
736 | */ | |
99512ac4 | 737 | static struct job * |
984263bc MD |
738 | getcurjob(struct job *nj) |
739 | { | |
740 | struct job *jp; | |
741 | ||
742 | /* Try to find a stopped one.. */ | |
743 | for (jp = jobmru; jp != NULL; jp = jp->next) | |
744 | if (jp->used && jp != nj && jp->state == JOBSTOPPED) | |
745 | return (jp); | |
746 | /* Otherwise the most recently used job that isn't `nj' */ | |
747 | for (jp = jobmru; jp != NULL; jp = jp->next) | |
748 | if (jp->used && jp != nj) | |
749 | return (jp); | |
750 | ||
751 | return (NULL); | |
752 | } | |
753 | ||
754 | #endif | |
755 | ||
756 | /* | |
757 | * Fork of a subshell. If we are doing job control, give the subshell its | |
758 | * own process group. Jp is a job structure that the job is to be added to. | |
759 | * N is the command that will be evaluated by the child. Both jp and n may | |
760 | * be NULL. The mode parameter can be one of the following: | |
761 | * FORK_FG - Fork off a foreground process. | |
762 | * FORK_BG - Fork off a background process. | |
763 | * FORK_NOJOB - Like FORK_FG, but don't give the process its own | |
764 | * process group even if job control is on. | |
765 | * | |
766 | * When job control is turned off, background processes have their standard | |
767 | * input redirected to /dev/null (except for the second and later processes | |
768 | * in a pipeline). | |
769 | */ | |
770 | ||
771 | pid_t | |
772 | forkshell(struct job *jp, union node *n, int mode) | |
773 | { | |
774 | pid_t pid; | |
775 | pid_t pgrp; | |
776 | ||
99512ac4 | 777 | TRACE(("forkshell(%%%td, %p, %d) called\n", jp - jobtab, (void *)n, |
984263bc MD |
778 | mode)); |
779 | INTOFF; | |
99512ac4 PA |
780 | if (mode == FORK_BG && (jp == NULL || jp->nprocs == 0)) |
781 | checkzombies(); | |
984263bc MD |
782 | flushall(); |
783 | pid = fork(); | |
784 | if (pid == -1) { | |
785 | TRACE(("Fork failed, errno=%d\n", errno)); | |
786 | INTON; | |
787 | error("Cannot fork: %s", strerror(errno)); | |
788 | } | |
789 | if (pid == 0) { | |
790 | struct job *p; | |
791 | int wasroot; | |
792 | int i; | |
793 | ||
794 | TRACE(("Child shell %d\n", (int)getpid())); | |
795 | wasroot = rootshell; | |
796 | rootshell = 0; | |
99512ac4 | 797 | handler = &main_handler; |
984263bc MD |
798 | closescript(); |
799 | INTON; | |
800 | clear_traps(); | |
801 | #if JOBS | |
802 | jobctl = 0; /* do job control only in root shell */ | |
803 | if (wasroot && mode != FORK_NOJOB && mflag) { | |
804 | if (jp == NULL || jp->nprocs == 0) | |
805 | pgrp = getpid(); | |
806 | else | |
807 | pgrp = jp->ps[0].pid; | |
808 | if (setpgid(0, pgrp) == 0 && mode == FORK_FG) { | |
809 | /*** this causes superfluous TIOCSPGRPS ***/ | |
810 | if (tcsetpgrp(ttyfd, pgrp) < 0) | |
811 | error("tcsetpgrp failed, errno=%d", errno); | |
812 | } | |
813 | setsignal(SIGTSTP); | |
814 | setsignal(SIGTTOU); | |
815 | } else if (mode == FORK_BG) { | |
816 | ignoresig(SIGINT); | |
817 | ignoresig(SIGQUIT); | |
818 | if ((jp == NULL || jp->nprocs == 0) && | |
819 | ! fd0_redirected_p ()) { | |
820 | close(0); | |
821 | if (open(_PATH_DEVNULL, O_RDONLY) != 0) | |
f893ef22 | 822 | error("cannot open %s: %s", |
984263bc MD |
823 | _PATH_DEVNULL, strerror(errno)); |
824 | } | |
825 | } | |
826 | #else | |
827 | if (mode == FORK_BG) { | |
828 | ignoresig(SIGINT); | |
829 | ignoresig(SIGQUIT); | |
830 | if ((jp == NULL || jp->nprocs == 0) && | |
831 | ! fd0_redirected_p ()) { | |
832 | close(0); | |
833 | if (open(_PATH_DEVNULL, O_RDONLY) != 0) | |
f893ef22 | 834 | error("cannot open %s: %s", |
984263bc MD |
835 | _PATH_DEVNULL, strerror(errno)); |
836 | } | |
837 | } | |
838 | #endif | |
839 | INTOFF; | |
840 | for (i = njobs, p = jobtab ; --i >= 0 ; p++) | |
841 | if (p->used) | |
842 | freejob(p); | |
843 | INTON; | |
844 | if (wasroot && iflag) { | |
845 | setsignal(SIGINT); | |
846 | setsignal(SIGQUIT); | |
847 | setsignal(SIGTERM); | |
848 | } | |
849 | return pid; | |
850 | } | |
851 | if (rootshell && mode != FORK_NOJOB && mflag) { | |
852 | if (jp == NULL || jp->nprocs == 0) | |
853 | pgrp = pid; | |
854 | else | |
855 | pgrp = jp->ps[0].pid; | |
856 | setpgid(pid, pgrp); | |
857 | } | |
99512ac4 PA |
858 | if (mode == FORK_BG) { |
859 | if (bgjob != NULL && bgjob->state == JOBDONE && | |
860 | !bgjob->remembered && !iflag) | |
861 | freejob(bgjob); | |
984263bc | 862 | backgndpid = pid; /* set $! */ |
99512ac4 PA |
863 | bgjob = jp; |
864 | } | |
984263bc MD |
865 | if (jp) { |
866 | struct procstat *ps = &jp->ps[jp->nprocs++]; | |
867 | ps->pid = pid; | |
868 | ps->status = -1; | |
869 | ps->cmd = nullstr; | |
870 | if (iflag && rootshell && n) | |
871 | ps->cmd = commandtext(n); | |
872 | jp->foreground = mode == FORK_FG; | |
873 | #if JOBS | |
874 | setcurjob(jp); | |
875 | #endif | |
876 | } | |
877 | INTON; | |
878 | TRACE(("In parent shell: child = %d\n", (int)pid)); | |
879 | return pid; | |
880 | } | |
881 | ||
882 | ||
883 | ||
884 | /* | |
885 | * Wait for job to finish. | |
886 | * | |
887 | * Under job control we have the problem that while a child process is | |
888 | * running interrupts generated by the user are sent to the child but not | |
889 | * to the shell. This means that an infinite loop started by an inter- | |
890 | * active user may be hard to kill. With job control turned off, an | |
891 | * interactive user may place an interactive program inside a loop. If | |
892 | * the interactive program catches interrupts, the user doesn't want | |
893 | * these interrupts to also abort the loop. The approach we take here | |
894 | * is to have the shell ignore interrupt signals while waiting for a | |
895 | * foreground process to terminate, and then send itself an interrupt | |
896 | * signal if the child process was terminated by an interrupt signal. | |
897 | * Unfortunately, some programs want to do a bit of cleanup and then | |
898 | * exit on interrupt; unless these processes terminate themselves by | |
899 | * sending a signal to themselves (instead of calling exit) they will | |
900 | * confuse this approach. | |
901 | */ | |
902 | ||
903 | int | |
904 | waitforjob(struct job *jp, int *origstatus) | |
905 | { | |
906 | #if JOBS | |
907 | pid_t mypgrp = getpgrp(); | |
99512ac4 | 908 | int propagate_int = jp->jobctl && jp->foreground; |
984263bc MD |
909 | #endif |
910 | int status; | |
911 | int st; | |
912 | ||
913 | INTOFF; | |
99512ac4 | 914 | TRACE(("waitforjob(%%%td) called\n", jp - jobtab + 1)); |
984263bc MD |
915 | while (jp->state == 0) |
916 | if (dowait(1, jp) == -1) | |
917 | dotrap(); | |
918 | #if JOBS | |
919 | if (jp->jobctl) { | |
920 | if (tcsetpgrp(ttyfd, mypgrp) < 0) | |
921 | error("tcsetpgrp failed, errno=%d\n", errno); | |
922 | } | |
923 | if (jp->state == JOBSTOPPED) | |
924 | setcurjob(jp); | |
925 | #endif | |
926 | status = jp->ps[jp->nprocs - 1].status; | |
927 | if (origstatus != NULL) | |
928 | *origstatus = status; | |
929 | /* convert to 8 bits */ | |
930 | if (WIFEXITED(status)) | |
931 | st = WEXITSTATUS(status); | |
932 | #if JOBS | |
933 | else if (WIFSTOPPED(status)) | |
934 | st = WSTOPSIG(status) + 128; | |
935 | #endif | |
936 | else | |
937 | st = WTERMSIG(status) + 128; | |
938 | if (! JOBS || jp->state == JOBDONE) | |
939 | freejob(jp); | |
940 | if (int_pending()) { | |
99512ac4 | 941 | if (!WIFSIGNALED(status) || WTERMSIG(status) != SIGINT) |
984263bc MD |
942 | CLEAR_PENDING_INT; |
943 | } | |
99512ac4 PA |
944 | #if JOBS |
945 | else if (rootshell && iflag && propagate_int && | |
946 | WIFSIGNALED(status) && WTERMSIG(status) == SIGINT) | |
947 | kill(getpid(), SIGINT); | |
948 | #endif | |
984263bc MD |
949 | INTON; |
950 | return st; | |
951 | } | |
952 | ||
953 | ||
954 | ||
955 | /* | |
956 | * Wait for a process to terminate. | |
957 | */ | |
958 | ||
99512ac4 | 959 | static pid_t |
984263bc MD |
960 | dowait(int block, struct job *job) |
961 | { | |
962 | pid_t pid; | |
963 | int status; | |
964 | struct procstat *sp; | |
965 | struct job *jp; | |
966 | struct job *thisjob; | |
967 | int done; | |
968 | int stopped; | |
969 | int sig; | |
99512ac4 | 970 | int coredump; |
984263bc MD |
971 | |
972 | in_dowait++; | |
973 | TRACE(("dowait(%d) called\n", block)); | |
974 | do { | |
975 | pid = waitproc(block, &status); | |
976 | TRACE(("wait returns %d, status=%d\n", (int)pid, status)); | |
977 | } while ((pid == -1 && errno == EINTR && breakwaitcmd == 0) || | |
fc88d1a0 | 978 | (pid > 0 && WIFSTOPPED(status) && !iflag)); |
984263bc | 979 | in_dowait--; |
fc88d1a0 PA |
980 | if (pid == -1 && errno == ECHILD && job != NULL) |
981 | job->state = JOBDONE; | |
984263bc MD |
982 | if (breakwaitcmd != 0) { |
983 | breakwaitcmd = 0; | |
7c9c5302 MD |
984 | /* |
985 | * Do not early terminate if the pid is positive, else the | |
986 | * job will not be properly recorded. | |
987 | */ | |
988 | if (pid <= 0) | |
989 | return -1; | |
984263bc MD |
990 | } |
991 | if (pid <= 0) | |
992 | return pid; | |
993 | INTOFF; | |
994 | thisjob = NULL; | |
995 | for (jp = jobtab ; jp < jobtab + njobs ; jp++) { | |
99512ac4 | 996 | if (jp->used && jp->nprocs > 0) { |
984263bc MD |
997 | done = 1; |
998 | stopped = 1; | |
999 | for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) { | |
1000 | if (sp->pid == -1) | |
1001 | continue; | |
1002 | if (sp->pid == pid) { | |
1003 | TRACE(("Changing status of proc %d from 0x%x to 0x%x\n", | |
1004 | (int)pid, sp->status, | |
1005 | status)); | |
1006 | sp->status = status; | |
1007 | thisjob = jp; | |
1008 | } | |
1009 | if (sp->status == -1) | |
1010 | stopped = 0; | |
1011 | else if (WIFSTOPPED(sp->status)) | |
1012 | done = 0; | |
1013 | } | |
1014 | if (stopped) { /* stopped or done */ | |
1015 | int state = done? JOBDONE : JOBSTOPPED; | |
1016 | if (jp->state != state) { | |
99512ac4 | 1017 | TRACE(("Job %td: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state)); |
984263bc | 1018 | jp->state = state; |
99512ac4 PA |
1019 | if (jp != job) { |
1020 | if (done && !jp->remembered && | |
1021 | !iflag && jp != bgjob) | |
1022 | freejob(jp); | |
984263bc | 1023 | #if JOBS |
99512ac4 PA |
1024 | else if (done) |
1025 | deljob(jp); | |
984263bc | 1026 | #endif |
99512ac4 | 1027 | } |
984263bc MD |
1028 | } |
1029 | } | |
1030 | } | |
1031 | } | |
1032 | INTON; | |
99512ac4 PA |
1033 | if (!thisjob || thisjob->state == 0) |
1034 | ; | |
1035 | else if ((!rootshell || !iflag || thisjob == job) && | |
1036 | thisjob->foreground && thisjob->state != JOBSTOPPED) { | |
1037 | sig = 0; | |
1038 | coredump = 0; | |
1039 | for (sp = thisjob->ps; sp < thisjob->ps + thisjob->nprocs; sp++) | |
1040 | if (WIFSIGNALED(sp->status)) { | |
1041 | sig = WTERMSIG(sp->status); | |
1042 | coredump = WCOREDUMP(sp->status); | |
1043 | } | |
1044 | if (sig > 0 && sig != SIGINT && sig != SIGPIPE) { | |
1045 | if (sig < sys_nsig && sys_siglist[sig]) | |
1046 | out2str(sys_siglist[sig]); | |
984263bc | 1047 | else |
99512ac4 PA |
1048 | outfmt(out2, "Signal %d", sig); |
1049 | if (coredump) | |
1050 | out2str(" (core dumped)"); | |
1051 | out2c('\n'); | |
1052 | flushout(out2); | |
984263bc MD |
1053 | } |
1054 | } else { | |
fc88d1a0 | 1055 | TRACE(("Not printing status, rootshell=%d, job=%p\n", rootshell, job)); |
99512ac4 | 1056 | thisjob->changed = 1; |
984263bc MD |
1057 | } |
1058 | return pid; | |
1059 | } | |
1060 | ||
1061 | ||
1062 | ||
1063 | /* | |
1064 | * Do a wait system call. If job control is compiled in, we accept | |
1065 | * stopped processes. If block is zero, we return a value of zero | |
1066 | * rather than blocking. | |
1067 | */ | |
99512ac4 | 1068 | static pid_t |
984263bc MD |
1069 | waitproc(int block, int *status) |
1070 | { | |
1071 | int flags; | |
1072 | ||
1073 | #if JOBS | |
1074 | flags = WUNTRACED; | |
1075 | #else | |
1076 | flags = 0; | |
1077 | #endif | |
1078 | if (block == 0) | |
1079 | flags |= WNOHANG; | |
2038fb68 | 1080 | return wait3(status, flags, NULL); |
984263bc MD |
1081 | } |
1082 | ||
1083 | /* | |
1084 | * return 1 if there are stopped jobs, otherwise 0 | |
1085 | */ | |
1086 | int job_warning = 0; | |
1087 | int | |
1088 | stoppedjobs(void) | |
1089 | { | |
1090 | int jobno; | |
1091 | struct job *jp; | |
1092 | ||
1093 | if (job_warning) | |
1094 | return (0); | |
1095 | for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { | |
1096 | if (jp->used == 0) | |
1097 | continue; | |
1098 | if (jp->state == JOBSTOPPED) { | |
99512ac4 | 1099 | out2fmt_flush("You have stopped jobs.\n"); |
984263bc MD |
1100 | job_warning = 2; |
1101 | return (1); | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | return (0); | |
1106 | } | |
1107 | ||
99512ac4 PA |
1108 | |
1109 | static void | |
1110 | checkzombies(void) | |
1111 | { | |
1112 | while (njobs > 0 && dowait(0, NULL) > 0) | |
1113 | ; | |
1114 | } | |
1115 | ||
1116 | ||
1117 | int | |
1118 | backgndpidset(void) | |
1119 | { | |
1120 | return backgndpid != -1; | |
1121 | } | |
1122 | ||
1123 | ||
1124 | pid_t | |
1125 | backgndpidval(void) | |
1126 | { | |
1127 | if (bgjob != NULL) | |
1128 | bgjob->remembered = 1; | |
1129 | return backgndpid; | |
1130 | } | |
1131 | ||
984263bc MD |
1132 | /* |
1133 | * Return a string identifying a command (to be printed by the | |
1134 | * jobs command. | |
1135 | */ | |
1136 | ||
99512ac4 PA |
1137 | static char *cmdnextc; |
1138 | static int cmdnleft; | |
984263bc MD |
1139 | #define MAXCMDTEXT 200 |
1140 | ||
1141 | char * | |
1142 | commandtext(union node *n) | |
1143 | { | |
1144 | char *name; | |
1145 | ||
1146 | cmdnextc = name = ckmalloc(MAXCMDTEXT); | |
1147 | cmdnleft = MAXCMDTEXT - 4; | |
1148 | cmdtxt(n); | |
1149 | *cmdnextc = '\0'; | |
1150 | return name; | |
1151 | } | |
1152 | ||
1153 | ||
99512ac4 | 1154 | static void |
984263bc MD |
1155 | cmdtxt(union node *n) |
1156 | { | |
1157 | union node *np; | |
1158 | struct nodelist *lp; | |
492efe05 | 1159 | const char *p; |
984263bc MD |
1160 | int i; |
1161 | char s[2]; | |
1162 | ||
1163 | if (n == NULL) | |
1164 | return; | |
1165 | switch (n->type) { | |
1166 | case NSEMI: | |
1167 | cmdtxt(n->nbinary.ch1); | |
1168 | cmdputs("; "); | |
1169 | cmdtxt(n->nbinary.ch2); | |
1170 | break; | |
1171 | case NAND: | |
1172 | cmdtxt(n->nbinary.ch1); | |
1173 | cmdputs(" && "); | |
1174 | cmdtxt(n->nbinary.ch2); | |
1175 | break; | |
1176 | case NOR: | |
1177 | cmdtxt(n->nbinary.ch1); | |
1178 | cmdputs(" || "); | |
1179 | cmdtxt(n->nbinary.ch2); | |
1180 | break; | |
1181 | case NPIPE: | |
1182 | for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) { | |
1183 | cmdtxt(lp->n); | |
1184 | if (lp->next) | |
1185 | cmdputs(" | "); | |
1186 | } | |
1187 | break; | |
1188 | case NSUBSHELL: | |
1189 | cmdputs("("); | |
1190 | cmdtxt(n->nredir.n); | |
1191 | cmdputs(")"); | |
1192 | break; | |
1193 | case NREDIR: | |
1194 | case NBACKGND: | |
1195 | cmdtxt(n->nredir.n); | |
1196 | break; | |
1197 | case NIF: | |
1198 | cmdputs("if "); | |
1199 | cmdtxt(n->nif.test); | |
1200 | cmdputs("; then "); | |
1201 | cmdtxt(n->nif.ifpart); | |
1202 | cmdputs("..."); | |
1203 | break; | |
1204 | case NWHILE: | |
1205 | cmdputs("while "); | |
1206 | goto until; | |
1207 | case NUNTIL: | |
1208 | cmdputs("until "); | |
1209 | until: | |
1210 | cmdtxt(n->nbinary.ch1); | |
1211 | cmdputs("; do "); | |
1212 | cmdtxt(n->nbinary.ch2); | |
1213 | cmdputs("; done"); | |
1214 | break; | |
1215 | case NFOR: | |
1216 | cmdputs("for "); | |
1217 | cmdputs(n->nfor.var); | |
1218 | cmdputs(" in ..."); | |
1219 | break; | |
1220 | case NCASE: | |
1221 | cmdputs("case "); | |
1222 | cmdputs(n->ncase.expr->narg.text); | |
1223 | cmdputs(" in ..."); | |
1224 | break; | |
1225 | case NDEFUN: | |
1226 | cmdputs(n->narg.text); | |
1227 | cmdputs("() ..."); | |
1228 | break; | |
1229 | case NCMD: | |
1230 | for (np = n->ncmd.args ; np ; np = np->narg.next) { | |
1231 | cmdtxt(np); | |
1232 | if (np->narg.next) | |
1233 | cmdputs(" "); | |
1234 | } | |
1235 | for (np = n->ncmd.redirect ; np ; np = np->nfile.next) { | |
1236 | cmdputs(" "); | |
1237 | cmdtxt(np); | |
1238 | } | |
1239 | break; | |
1240 | case NARG: | |
1241 | cmdputs(n->narg.text); | |
1242 | break; | |
1243 | case NTO: | |
1244 | p = ">"; i = 1; goto redir; | |
1245 | case NAPPEND: | |
1246 | p = ">>"; i = 1; goto redir; | |
1247 | case NTOFD: | |
1248 | p = ">&"; i = 1; goto redir; | |
1249 | case NCLOBBER: | |
1250 | p = ">|"; i = 1; goto redir; | |
1251 | case NFROM: | |
1252 | p = "<"; i = 0; goto redir; | |
1253 | case NFROMTO: | |
1254 | p = "<>"; i = 0; goto redir; | |
1255 | case NFROMFD: | |
1256 | p = "<&"; i = 0; goto redir; | |
1257 | redir: | |
1258 | if (n->nfile.fd != i) { | |
1259 | s[0] = n->nfile.fd + '0'; | |
1260 | s[1] = '\0'; | |
1261 | cmdputs(s); | |
1262 | } | |
1263 | cmdputs(p); | |
1264 | if (n->type == NTOFD || n->type == NFROMFD) { | |
1265 | if (n->ndup.dupfd >= 0) | |
1266 | s[0] = n->ndup.dupfd + '0'; | |
1267 | else | |
1268 | s[0] = '-'; | |
1269 | s[1] = '\0'; | |
1270 | cmdputs(s); | |
1271 | } else { | |
1272 | cmdtxt(n->nfile.fname); | |
1273 | } | |
1274 | break; | |
1275 | case NHERE: | |
1276 | case NXHERE: | |
1277 | cmdputs("<<..."); | |
1278 | break; | |
1279 | default: | |
1280 | cmdputs("???"); | |
1281 | break; | |
1282 | } | |
1283 | } | |
1284 | ||
1285 | ||
1286 | ||
99512ac4 | 1287 | static void |
492efe05 | 1288 | cmdputs(const char *s) |
984263bc | 1289 | { |
492efe05 CP |
1290 | const char *p; |
1291 | char *q; | |
984263bc MD |
1292 | char c; |
1293 | int subtype = 0; | |
1294 | ||
1295 | if (cmdnleft <= 0) | |
1296 | return; | |
1297 | p = s; | |
1298 | q = cmdnextc; | |
1299 | while ((c = *p++) != '\0') { | |
1300 | if (c == CTLESC) | |
1301 | *q++ = *p++; | |
1302 | else if (c == CTLVAR) { | |
1303 | *q++ = '$'; | |
1304 | if (--cmdnleft > 0) | |
1305 | *q++ = '{'; | |
1306 | subtype = *p++; | |
99512ac4 PA |
1307 | if ((subtype & VSTYPE) == VSLENGTH && --cmdnleft > 0) |
1308 | *q++ = '#'; | |
984263bc | 1309 | } else if (c == '=' && subtype != 0) { |
99512ac4 PA |
1310 | *q = "}-+?=##%%\0X"[(subtype & VSTYPE) - VSNORMAL]; |
1311 | if (*q) | |
1312 | q++; | |
1313 | else | |
1314 | cmdnleft++; | |
1315 | if (((subtype & VSTYPE) == VSTRIMLEFTMAX || | |
1316 | (subtype & VSTYPE) == VSTRIMRIGHTMAX) && | |
1317 | --cmdnleft > 0) | |
1318 | *q = q[-1], q++; | |
984263bc MD |
1319 | subtype = 0; |
1320 | } else if (c == CTLENDVAR) { | |
1321 | *q++ = '}'; | |
99512ac4 PA |
1322 | } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) { |
1323 | cmdnleft -= 5; | |
1324 | if (cmdnleft > 0) { | |
1325 | *q++ = '$'; | |
1326 | *q++ = '('; | |
1327 | *q++ = '.'; | |
1328 | *q++ = '.'; | |
1329 | *q++ = '.'; | |
1330 | *q++ = ')'; | |
1331 | } | |
1332 | } else if (c == CTLARI) { | |
1333 | cmdnleft -= 2; | |
1334 | if (cmdnleft > 0) { | |
1335 | *q++ = '$'; | |
1336 | *q++ = '('; | |
1337 | *q++ = '('; | |
1338 | } | |
1339 | p++; | |
1340 | } else if (c == CTLENDARI) { | |
1341 | if (--cmdnleft > 0) { | |
1342 | *q++ = ')'; | |
1343 | *q++ = ')'; | |
1344 | } | |
1345 | } else if (c == CTLQUOTEMARK || c == CTLQUOTEEND) | |
1346 | cmdnleft++; /* ignore */ | |
984263bc MD |
1347 | else |
1348 | *q++ = c; | |
1349 | if (--cmdnleft <= 0) { | |
1350 | *q++ = '.'; | |
1351 | *q++ = '.'; | |
1352 | *q++ = '.'; | |
1353 | break; | |
1354 | } | |
1355 | } | |
1356 | cmdnextc = q; | |
1357 | } |