File: | src/bin/csh/proc.c |
Warning: | line 803, column 2 Value stored to 'hadnl' is never read |
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1 | /* $OpenBSD: proc.c,v 1.35 2023/03/08 04:43:04 guenther Exp $ */ |
2 | /* $NetBSD: proc.c,v 1.9 1995/04/29 23:21:33 mycroft Exp $ */ |
3 | |
4 | /*- |
5 | * Copyright (c) 1980, 1991, 1993 |
6 | * The Regents of the University of California. All rights reserved. |
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. Neither the name of the University nor the names of its contributors |
17 | * may be used to endorse or promote products derived from this software |
18 | * without specific prior written permission. |
19 | * |
20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
30 | * SUCH DAMAGE. |
31 | */ |
32 | |
33 | #include <sys/types.h> |
34 | #include <sys/wait.h> |
35 | #include <errno(*__errno()).h> |
36 | #include <unistd.h> |
37 | #include <limits.h> |
38 | #include <stdlib.h> |
39 | #include <string.h> |
40 | #include <stdarg.h> |
41 | |
42 | #include "csh.h" |
43 | #include "dir.h" |
44 | #include "proc.h" |
45 | #include "extern.h" |
46 | |
47 | #define BIGINDEX9 9 /* largest desirable job index */ |
48 | |
49 | struct process proclist; /* list head of all processes */ |
50 | bool pnoprocesses; /* pchild found nothing to wait for */ |
51 | |
52 | struct process *pholdjob; /* one level stack of current jobs */ |
53 | |
54 | struct process *pcurrjob; /* current job */ |
55 | struct process *pcurrent; /* current job in table */ |
56 | struct process *pprevious; /* previous job in table */ |
57 | |
58 | int pmaxindex; /* current maximum job index */ |
59 | |
60 | static struct rusage zru; |
61 | |
62 | static void pflushall(void); |
63 | static void pflush(struct process *); |
64 | static void pclrcurr(struct process *); |
65 | static void padd(struct command *); |
66 | static int pprint(struct process *, int); |
67 | static void ptprint(struct process *); |
68 | static void pads(Char *); |
69 | static void pkill(Char **v, int); |
70 | static struct process |
71 | *pgetcurr(struct process *); |
72 | static void okpcntl(void); |
73 | |
74 | /* |
75 | * pchild - called at interrupt level by the SIGCHLD signal |
76 | * indicating that at least one child has terminated or stopped |
77 | * thus at least one wait system call will definitely return a |
78 | * childs status. Top level routines (like pwait) must be sure |
79 | * to mask interrupts when playing with the proclist data structures! |
80 | */ |
81 | /* ARGUSED */ |
82 | void |
83 | pchild(int notused) |
84 | { |
85 | struct process *pp; |
86 | struct process *fp; |
87 | int pid; |
88 | extern int insource; |
89 | int save_errno = errno(*__errno()); |
90 | int w; |
91 | int jobflags; |
92 | struct rusage ru; |
93 | |
94 | loop: |
95 | errno(*__errno()) = 0; /* reset, just in case */ |
96 | pid = wait3(&w, |
97 | (setintr && (intty || insource) ? WNOHANG0x01 | WUNTRACED0x02 : WNOHANG0x01), &ru); |
98 | |
99 | if (pid <= 0) { |
100 | if (errno(*__errno()) == EINTR4) { |
101 | errno(*__errno()) = 0; |
102 | goto loop; |
103 | } |
104 | pnoprocesses = pid == -1; |
105 | errno(*__errno()) = save_errno; |
106 | return; |
107 | } |
108 | for (pp = proclist.p_next; pp != NULL((void *)0); pp = pp->p_next) |
109 | if (pid == pp->p_pid) |
110 | goto found; |
111 | goto loop; |
112 | found: |
113 | if (pid == atoi(short2str(value(STRchild)value1(STRchild, &shvhed)))) |
114 | unsetv(STRchild); |
115 | pp->p_flags &= ~(PRUNNING(1<<0) | PSTOPPED(1<<1) | PREPORTED(1<<12)); |
116 | if (WIFSTOPPED(w)(((w) & 0xff) == 0177)) { |
117 | pp->p_flags |= PSTOPPED(1<<1); |
118 | pp->p_reason = WSTOPSIG(w)(int)(((unsigned)(w) >> 8) & 0xff); |
119 | } |
120 | else { |
121 | if (pp->p_flags & (PTIME(1<<6) | PPTIME(1<<14)) || adrof(STRtime)adrof1(STRtime, &shvhed)) |
122 | (void) clock_gettime(CLOCK_MONOTONIC3, &pp->p_etime); |
123 | |
124 | pp->p_rusage = ru; |
125 | if (WIFSIGNALED(w)(((w) & 0177) != 0177 && ((w) & 0177) != 0)) { |
126 | if (WTERMSIG(w)(((w) & 0177)) == SIGINT2) |
127 | pp->p_flags |= PINTERRUPTED(1<<13); |
128 | else |
129 | pp->p_flags |= PSIGNALED(1<<4); |
130 | if (WCOREDUMP(w)((w) & 0200)) |
131 | pp->p_flags |= PDUMPED(1<<9); |
132 | pp->p_reason = WTERMSIG(w)(((w) & 0177)); |
133 | } |
134 | else { |
135 | pp->p_reason = WEXITSTATUS(w)(int)(((unsigned)(w) >> 8) & 0xff); |
136 | if (pp->p_reason != 0) |
137 | pp->p_flags |= PAEXITED(1<<3); |
138 | else |
139 | pp->p_flags |= PNEXITED(1<<2); |
140 | } |
141 | } |
142 | jobflags = 0; |
143 | fp = pp; |
144 | do { |
145 | if ((fp->p_flags & (PPTIME(1<<14) | PRUNNING(1<<0) | PSTOPPED(1<<1))) == 0 && |
146 | !child && adrof(STRtime)adrof1(STRtime, &shvhed) && |
147 | fp->p_rusage.ru_utime.tv_sec + fp->p_rusage.ru_stime.tv_sec |
148 | >= atoi(short2str(value(STRtime)value1(STRtime, &shvhed)))) |
149 | fp->p_flags |= PTIME(1<<6); |
150 | jobflags |= fp->p_flags; |
151 | } while ((fp = fp->p_friends) != pp); |
152 | pp->p_flags &= ~PFOREGND(1<<8); |
153 | if (pp == pp->p_friends && (pp->p_flags & PPTIME(1<<14))) { |
154 | pp->p_flags &= ~PPTIME(1<<14); |
155 | pp->p_flags |= PTIME(1<<6); |
156 | } |
157 | if ((jobflags & (PRUNNING(1<<0) | PREPORTED(1<<12))) == 0) { |
158 | fp = pp; |
159 | do { |
160 | if (fp->p_flags & PSTOPPED(1<<1)) |
161 | fp->p_flags |= PREPORTED(1<<12); |
162 | } while ((fp = fp->p_friends) != pp); |
163 | while (fp->p_pid != fp->p_jobid) |
164 | fp = fp->p_friends; |
165 | if (jobflags & PSTOPPED(1<<1)) { |
166 | if (pcurrent && pcurrent != fp) |
167 | pprevious = pcurrent; |
168 | pcurrent = fp; |
169 | } |
170 | else |
171 | pclrcurr(fp); |
172 | if (jobflags & PFOREGND(1<<8)) { |
173 | if (jobflags & (PSIGNALED(1<<4) | PSTOPPED(1<<1) | PPTIME(1<<14)) || |
174 | !eq(dcwd->di_name, fp->p_cwd->di_name)(Strcmp(dcwd->di_name, fp->p_cwd->di_name) == 0)) { |
175 | ; /* print in pjwait */ |
176 | } |
177 | /* PWP: print a newline after ^C */ |
178 | else if (jobflags & PINTERRUPTED(1<<13)) { |
179 | (void) vis_fputc('\r' | QUOTE0100000U, cshout); |
180 | (void) fputc('\n', cshout); |
181 | } |
182 | } |
183 | else { |
184 | if (jobflags & PNOTIFY(1<<5) || adrof(STRnotify)adrof1(STRnotify, &shvhed)) { |
185 | (void) vis_fputc('\r' | QUOTE0100000U, cshout); |
186 | (void) fputc('\n', cshout); |
187 | (void) pprint(pp, NUMBER01 | NAME02 | REASON04); |
188 | if ((jobflags & PSTOPPED(1<<1)) == 0) |
189 | pflush(pp); |
190 | } |
191 | else { |
192 | fp->p_flags |= PNEEDNOTE(1<<15); |
193 | neednote++; |
194 | } |
195 | } |
196 | } |
197 | goto loop; |
198 | } |
199 | |
200 | void |
201 | pnote(void) |
202 | { |
203 | struct process *pp; |
204 | int flags; |
205 | sigset_t sigset, osigset; |
206 | |
207 | neednote = 0; |
208 | sigemptyset(&sigset); |
209 | sigaddset(&sigset, SIGCHLD20); |
210 | for (pp = proclist.p_next; pp != NULL((void *)0); pp = pp->p_next) { |
211 | if (pp->p_flags & PNEEDNOTE(1<<15)) { |
212 | sigprocmask(SIG_BLOCK1, &sigset, &osigset); |
213 | pp->p_flags &= ~PNEEDNOTE(1<<15); |
214 | flags = pprint(pp, NUMBER01 | NAME02 | REASON04); |
215 | if ((flags & (PRUNNING(1<<0) | PSTOPPED(1<<1))) == 0) |
216 | pflush(pp); |
217 | sigprocmask(SIG_SETMASK3, &osigset, NULL((void *)0)); |
218 | } |
219 | } |
220 | } |
221 | |
222 | /* |
223 | * pwait - wait for current job to terminate, maintaining integrity |
224 | * of current and previous job indicators. |
225 | */ |
226 | void |
227 | pwait(void) |
228 | { |
229 | struct process *fp, *pp; |
230 | sigset_t sigset, osigset; |
231 | |
232 | /* |
233 | * Here's where dead procs get flushed. |
234 | */ |
235 | sigemptyset(&sigset); |
236 | sigaddset(&sigset, SIGCHLD20); |
237 | sigprocmask(SIG_BLOCK1, &sigset, &osigset); |
238 | for (pp = (fp = &proclist)->p_next; pp != NULL((void *)0); pp = (fp = pp)->p_next) |
239 | if (pp->p_pid == 0) { |
240 | fp->p_next = pp->p_next; |
241 | free(pp->p_command); |
242 | if (pp->p_cwd && --pp->p_cwd->di_count == 0) |
243 | if (pp->p_cwd->di_next == 0) |
244 | dfree(pp->p_cwd); |
245 | free(pp); |
246 | pp = fp; |
247 | } |
248 | sigprocmask(SIG_SETMASK3, &osigset, NULL((void *)0)); |
249 | pjwait(pcurrjob); |
250 | } |
251 | |
252 | |
253 | /* |
254 | * pjwait - wait for a job to finish or become stopped |
255 | * It is assumed to be in the foreground state (PFOREGND) |
256 | */ |
257 | void |
258 | pjwait(struct process *pp) |
259 | { |
260 | struct process *fp; |
261 | int jobflags, reason; |
262 | sigset_t sigset, osigset; |
263 | |
264 | while (pp->p_pid != pp->p_jobid) |
265 | pp = pp->p_friends; |
266 | fp = pp; |
267 | |
268 | do { |
269 | if ((fp->p_flags & (PFOREGND(1<<8) | PRUNNING(1<<0))) == PRUNNING(1<<0)) |
270 | (void) fprintf(csherr, "BUG: waiting for background job!\n"); |
271 | } while ((fp = fp->p_friends) != pp); |
272 | /* |
273 | * Now keep pausing as long as we are not interrupted (SIGINT), and the |
274 | * target process, or any of its friends, are running |
275 | */ |
276 | fp = pp; |
277 | sigemptyset(&sigset); |
278 | sigaddset(&sigset, SIGCHLD20); |
279 | sigprocmask(SIG_BLOCK1, &sigset, &osigset); |
280 | for (;;) { |
281 | sigemptyset(&sigset); |
282 | sigaddset(&sigset, SIGCHLD20); |
283 | sigprocmask(SIG_BLOCK1, &sigset, NULL((void *)0)); |
284 | jobflags = 0; |
285 | do |
286 | jobflags |= fp->p_flags; |
287 | while ((fp = (fp->p_friends)) != pp); |
288 | if ((jobflags & PRUNNING(1<<0)) == 0) |
289 | break; |
290 | sigset = osigset; |
291 | sigdelset(&sigset, SIGCHLD20); |
292 | sigsuspend(&sigset); |
293 | } |
294 | sigprocmask(SIG_SETMASK3, &osigset, NULL((void *)0)); |
295 | if (tpgrp > 0) /* get tty back */ |
296 | (void) tcsetpgrp(FSHTTY15, tpgrp); |
297 | if ((jobflags & (PSIGNALED(1<<4) | PSTOPPED(1<<1) | PTIME(1<<6))) || |
298 | !eq(dcwd->di_name, fp->p_cwd->di_name)(Strcmp(dcwd->di_name, fp->p_cwd->di_name) == 0)) { |
299 | if (jobflags & PSTOPPED(1<<1)) { |
300 | (void) fputc('\n', cshout); |
301 | if (adrof(STRlistjobs)adrof1(STRlistjobs, &shvhed)) { |
302 | Char *jobcommand[3]; |
303 | |
304 | jobcommand[0] = STRjobs; |
305 | if (eq(value(STRlistjobs), STRlong)(Strcmp(value1(STRlistjobs, &shvhed), STRlong) == 0)) |
306 | jobcommand[1] = STRml; |
307 | else |
308 | jobcommand[1] = NULL((void *)0); |
309 | jobcommand[2] = NULL((void *)0); |
310 | |
311 | dojobs(jobcommand, NULL((void *)0)); |
312 | (void) pprint(pp, SHELLDIR040); |
313 | } |
314 | else |
315 | (void) pprint(pp, AREASON0200 | SHELLDIR040); |
316 | } |
317 | else |
318 | (void) pprint(pp, AREASON0200 | SHELLDIR040); |
319 | } |
320 | if ((jobflags & (PINTERRUPTED(1<<13) | PSTOPPED(1<<1))) && setintr && |
321 | (!gointr || !eq(gointr, STRminus)(Strcmp(gointr, STRminus) == 0))) { |
322 | if ((jobflags & PSTOPPED(1<<1)) == 0) |
323 | pflush(pp); |
324 | pintr1(0); |
325 | /* NOTREACHED */ |
326 | } |
327 | reason = 0; |
328 | fp = pp; |
329 | do { |
330 | if (fp->p_reason) |
331 | reason = fp->p_flags & (PSIGNALED(1<<4) | PINTERRUPTED(1<<13)) ? |
332 | fp->p_reason | META0200 : fp->p_reason; |
333 | } while ((fp = fp->p_friends) != pp); |
334 | if ((reason != 0) && (adrof(STRprintexitvalue)adrof1(STRprintexitvalue, &shvhed))) { |
335 | (void) fprintf(cshout, "Exit %d\n", reason); |
336 | } |
337 | set(STRstatus, putn(reason)); |
338 | if (reason && exiterr) |
339 | exitstat(); |
340 | pflush(pp); |
341 | } |
342 | |
343 | /* |
344 | * dowait - wait for all processes to finish |
345 | */ |
346 | void |
347 | dowait(Char **v, struct command *t) |
348 | { |
349 | struct process *pp; |
350 | sigset_t sigset, osigset; |
351 | |
352 | pjobs++; |
353 | sigemptyset(&sigset); |
354 | sigaddset(&sigset, SIGCHLD20); |
355 | sigprocmask(SIG_BLOCK1, &sigset, &osigset); |
356 | loop: |
357 | for (pp = proclist.p_next; pp; pp = pp->p_next) |
358 | if (pp->p_pid && /* pp->p_pid == pp->p_jobid && */ |
359 | pp->p_flags & PRUNNING(1<<0)) { |
360 | sigemptyset(&sigset); |
361 | sigsuspend(&sigset); |
362 | goto loop; |
363 | } |
364 | sigprocmask(SIG_SETMASK3, &osigset, NULL((void *)0)); |
365 | pjobs = 0; |
366 | } |
367 | |
368 | /* |
369 | * pflushall - flush all jobs from list (e.g. at fork()) |
370 | */ |
371 | static void |
372 | pflushall(void) |
373 | { |
374 | struct process *pp; |
375 | |
376 | for (pp = proclist.p_next; pp != NULL((void *)0); pp = pp->p_next) |
377 | if (pp->p_pid) |
378 | pflush(pp); |
379 | } |
380 | |
381 | /* |
382 | * pflush - flag all process structures in the same job as the |
383 | * the argument process for deletion. The actual free of the |
384 | * space is not done here since pflush is called at interrupt level. |
385 | */ |
386 | static void |
387 | pflush(struct process *pp) |
388 | { |
389 | struct process *np; |
390 | int idx; |
391 | |
392 | if (pp->p_pid == 0) { |
393 | (void) fprintf(csherr, "BUG: process flushed twice"); |
394 | return; |
395 | } |
396 | while (pp->p_pid != pp->p_jobid) |
397 | pp = pp->p_friends; |
398 | pclrcurr(pp); |
399 | if (pp == pcurrjob) |
400 | pcurrjob = 0; |
401 | idx = pp->p_index; |
402 | np = pp; |
403 | do { |
404 | np->p_index = np->p_pid = 0; |
405 | np->p_flags &= ~PNEEDNOTE(1<<15); |
406 | } while ((np = np->p_friends) != pp); |
407 | if (idx == pmaxindex) { |
408 | for (np = proclist.p_next, idx = 0; np; np = np->p_next) |
409 | if (np->p_index > idx) |
410 | idx = np->p_index; |
411 | pmaxindex = idx; |
412 | } |
413 | } |
414 | |
415 | /* |
416 | * pclrcurr - make sure the given job is not the current or previous job; |
417 | * pp MUST be the job leader |
418 | */ |
419 | static void |
420 | pclrcurr(struct process *pp) |
421 | { |
422 | |
423 | if (pp == pcurrent) |
424 | if (pprevious != NULL((void *)0)) { |
425 | pcurrent = pprevious; |
426 | pprevious = pgetcurr(pp); |
427 | } |
428 | else { |
429 | pcurrent = pgetcurr(pp); |
430 | pprevious = pgetcurr(pp); |
431 | } |
432 | else if (pp == pprevious) |
433 | pprevious = pgetcurr(pp); |
434 | } |
435 | |
436 | /* +4 here is 1 for '\0', 1 ea for << >& >> */ |
437 | static Char command[PMAXLEN80 + 4]; |
438 | static int cmdlen; |
439 | static Char *cmdp; |
440 | |
441 | /* |
442 | * palloc - allocate a process structure and fill it up. |
443 | * an important assumption is made that the process is running. |
444 | */ |
445 | void |
446 | palloc(int pid, struct command *t) |
447 | { |
448 | struct process *pp; |
449 | int i; |
450 | |
451 | pp = xcalloc(1, (size_t) sizeof(struct process)); |
452 | pp->p_pid = pid; |
453 | pp->p_flags = t->t_dflg & F_AMPERSAND(1<<0) ? PRUNNING(1<<0) : PRUNNING(1<<0) | PFOREGND(1<<8); |
454 | if (t->t_dflg & F_TIME(1<<13)) |
455 | pp->p_flags |= PPTIME(1<<14); |
456 | cmdp = command; |
457 | cmdlen = 0; |
458 | padd(t); |
459 | *cmdp++ = 0; |
460 | if (t->t_dflg & F_PIPEOUT(1<<3)) { |
461 | pp->p_flags |= PPOU(1<<11); |
462 | if (t->t_dflg & F_STDERR(1<<7)) |
463 | pp->p_flags |= PERR(1<<10); |
464 | } |
465 | pp->p_command = Strsave(command); |
466 | if (pcurrjob) { |
467 | struct process *fp; |
468 | |
469 | /* careful here with interrupt level */ |
470 | pp->p_cwd = 0; |
471 | pp->p_index = pcurrjob->p_index; |
472 | pp->p_friends = pcurrjob; |
473 | pp->p_jobid = pcurrjob->p_pid; |
474 | for (fp = pcurrjob; fp->p_friends != pcurrjob; fp = fp->p_friends) |
475 | continue; |
476 | fp->p_friends = pp; |
477 | } |
478 | else { |
479 | pcurrjob = pp; |
480 | pp->p_jobid = pid; |
481 | pp->p_friends = pp; |
482 | pp->p_cwd = dcwd; |
483 | dcwd->di_count++; |
484 | if (pmaxindex < BIGINDEX9) |
485 | pp->p_index = ++pmaxindex; |
486 | else { |
487 | struct process *np; |
488 | |
489 | for (i = 1;; i++) { |
490 | for (np = proclist.p_next; np; np = np->p_next) |
491 | if (np->p_index == i) |
492 | goto tryagain; |
493 | pp->p_index = i; |
494 | if (i > pmaxindex) |
495 | pmaxindex = i; |
496 | break; |
497 | tryagain:; |
498 | } |
499 | } |
500 | if (pcurrent == NULL((void *)0)) |
501 | pcurrent = pp; |
502 | else if (pprevious == NULL((void *)0)) |
503 | pprevious = pp; |
504 | } |
505 | pp->p_next = proclist.p_next; |
506 | proclist.p_next = pp; |
507 | (void) clock_gettime(CLOCK_MONOTONIC3, &pp->p_btime); |
508 | } |
509 | |
510 | static void |
511 | padd(struct command *t) |
512 | { |
513 | Char **argp; |
514 | |
515 | if (t == 0) |
516 | return; |
517 | switch (t->t_dtyp) { |
518 | |
519 | case NODE_PAREN2: |
520 | pads(STRLparensp); |
521 | padd(t->t_dspr); |
522 | pads(STRspRparen); |
523 | break; |
524 | |
525 | case NODE_COMMAND1: |
526 | for (argp = t->t_dcom; *argp; argp++) { |
527 | pads(*argp); |
528 | if (argp[1]) |
529 | pads(STRspace); |
530 | } |
531 | break; |
532 | |
533 | case NODE_OR5: |
534 | case NODE_AND6: |
535 | case NODE_PIPE3: |
536 | case NODE_LIST4: |
537 | padd(t->t_dcarL.T_dcar); |
538 | switch (t->t_dtyp) { |
539 | case NODE_OR5: |
540 | pads(STRspor2sp); |
541 | break; |
542 | case NODE_AND6: |
543 | pads(STRspand2sp); |
544 | break; |
545 | case NODE_PIPE3: |
546 | pads(STRsporsp); |
547 | break; |
548 | case NODE_LIST4: |
549 | pads(STRsemisp); |
550 | break; |
551 | } |
552 | padd(t->t_dcdrR.T_dcdr); |
553 | return; |
554 | } |
555 | if ((t->t_dflg & F_PIPEIN(1<<2)) == 0 && t->t_dlefL.T_dlef) { |
556 | pads((t->t_dflg & F_READ(1<<9)) ? STRspLarrow2sp : STRspLarrowsp); |
557 | pads(t->t_dlefL.T_dlef); |
558 | } |
559 | if ((t->t_dflg & F_PIPEOUT(1<<3)) == 0 && t->t_dritR.T_drit) { |
560 | pads((t->t_dflg & F_APPEND(1<<1)) ? STRspRarrow2 : STRspRarrow); |
561 | if (t->t_dflg & F_STDERR(1<<7)) |
562 | pads(STRand); |
563 | pads(STRspace); |
564 | pads(t->t_dritR.T_drit); |
565 | } |
566 | } |
567 | |
568 | static void |
569 | pads(Char *cp) |
570 | { |
571 | int i; |
572 | |
573 | /* |
574 | * Avoid the Quoted Space alias hack! Reported by: |
575 | * sam@john-bigboote.ICS.UCI.EDU (Sam Horrocks) |
576 | */ |
577 | if (cp[0] == STRQNULL[0]) |
578 | cp++; |
579 | |
580 | i = Strlen(cp); |
581 | |
582 | if (cmdlen >= PMAXLEN80) |
583 | return; |
584 | if (cmdlen + i >= PMAXLEN80) { |
585 | (void) Strlcpy(cmdp, STRsp3dots, PMAXLEN80 - cmdlen); |
586 | cmdlen = PMAXLEN80; |
587 | cmdp += 4; |
588 | return; |
589 | } |
590 | (void) Strlcpy(cmdp, cp, PMAXLEN80 - cmdlen); |
591 | cmdp += i; |
592 | cmdlen += i; |
593 | } |
594 | |
595 | /* |
596 | * psavejob - temporarily save the current job on a one level stack |
597 | * so another job can be created. Used for { } in exp6 |
598 | * and `` in globbing. |
599 | */ |
600 | void |
601 | psavejob(void) |
602 | { |
603 | |
604 | pholdjob = pcurrjob; |
605 | pcurrjob = NULL((void *)0); |
606 | } |
607 | |
608 | /* |
609 | * prestjob - opposite of psavejob. This may be missed if we are interrupted |
610 | * somewhere, but pendjob cleans up anyway. |
611 | */ |
612 | void |
613 | prestjob(void) |
614 | { |
615 | |
616 | pcurrjob = pholdjob; |
617 | pholdjob = NULL((void *)0); |
618 | } |
619 | |
620 | /* |
621 | * pendjob - indicate that a job (set of commands) has been completed |
622 | * or is about to begin. |
623 | */ |
624 | void |
625 | pendjob(void) |
626 | { |
627 | struct process *pp, *tp; |
628 | |
629 | if (pcurrjob && (pcurrjob->p_flags & (PFOREGND(1<<8) | PSTOPPED(1<<1))) == 0) { |
630 | pp = pcurrjob; |
631 | while (pp->p_pid != pp->p_jobid) |
632 | pp = pp->p_friends; |
633 | (void) fprintf(cshout, "[%d]", pp->p_index); |
634 | tp = pp; |
635 | do { |
636 | (void) fprintf(cshout, " %d", pp->p_pid); |
637 | pp = pp->p_friends; |
638 | } while (pp != tp); |
639 | (void) fputc('\n', cshout); |
640 | } |
641 | pholdjob = pcurrjob = 0; |
642 | } |
643 | |
644 | /* |
645 | * pprint - print a job |
646 | */ |
647 | static int |
648 | pprint(struct process *pp, bool flag) |
649 | { |
650 | int status, reason; |
651 | struct process *tp; |
652 | int jobflags, pstatus; |
653 | bool hadnl = 1; /* did we just have a newline */ |
654 | |
655 | (void) fpurge(cshout); |
656 | |
657 | while (pp->p_pid != pp->p_jobid) |
658 | pp = pp->p_friends; |
659 | if (pp == pp->p_friends && (pp->p_flags & PPTIME(1<<14))) { |
660 | pp->p_flags &= ~PPTIME(1<<14); |
661 | pp->p_flags |= PTIME(1<<6); |
662 | } |
663 | tp = pp; |
664 | status = reason = -1; |
665 | jobflags = 0; |
666 | do { |
667 | jobflags |= pp->p_flags; |
668 | pstatus = pp->p_flags & PALLSTATES((1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<< 4)|(1<<13)); |
669 | if (tp != pp && !hadnl && !(flag & FANCY020) && |
670 | ((pstatus == status && pp->p_reason == reason) || |
671 | !(flag & REASON04))) { |
672 | (void) fputc(' ', cshout); |
673 | hadnl = 0; |
674 | } |
675 | else { |
676 | if (tp != pp && !hadnl) { |
677 | (void) fputc('\n', cshout); |
678 | hadnl = 1; |
679 | } |
680 | if (flag & NUMBER01) { |
681 | if (pp == tp) |
682 | (void) fprintf(cshout, "[%d]%s %c ", pp->p_index, |
683 | pp->p_index < 10 ? " " : "", |
684 | pp == pcurrent ? '+' : |
685 | (pp == pprevious ? '-' : ' ')); |
686 | else |
687 | (void) fprintf(cshout, " "); |
688 | hadnl = 0; |
689 | } |
690 | if (flag & FANCY020) { |
691 | (void) fprintf(cshout, "%5d ", pp->p_pid); |
692 | hadnl = 0; |
693 | } |
694 | if (flag & (REASON04 | AREASON0200)) { |
695 | int width = 0; |
696 | if (flag & NAME02) |
697 | width = -23; |
698 | if (pstatus == status) |
699 | if (pp->p_reason == reason) { |
700 | (void) fprintf(cshout, "%*s", width, ""); |
701 | hadnl = 0; |
702 | goto prcomd; |
703 | } |
704 | else |
705 | reason = pp->p_reason; |
706 | else { |
707 | status = pstatus; |
708 | reason = pp->p_reason; |
709 | } |
710 | switch (status) { |
711 | |
712 | case PRUNNING(1<<0): |
713 | (void) fprintf(cshout, "%*s", width, "Running "); |
714 | hadnl = 0; |
715 | break; |
716 | |
717 | case PINTERRUPTED(1<<13): |
718 | case PSTOPPED(1<<1): |
719 | case PSIGNALED(1<<4): |
720 | /* |
721 | * tell what happened to the background job |
722 | * From: Michael Schroeder |
723 | * <mlschroe@immd4.informatik.uni-erlangen.de> |
724 | */ |
725 | if ((flag & REASON04) |
726 | || ((flag & AREASON0200) |
727 | && reason != SIGINT2 |
728 | && (reason != SIGPIPE13 |
729 | || (pp->p_flags & PPOU(1<<11)) == 0))) { |
730 | (void) fprintf(cshout, "%*s", width, |
731 | sys_siglist[(unsigned char) |
732 | pp->p_reason]); |
733 | hadnl = 0; |
734 | } |
735 | break; |
736 | |
737 | case PNEXITED(1<<2): |
738 | case PAEXITED(1<<3): |
739 | if (flag & REASON04) { |
740 | if (pp->p_reason) |
741 | (void) fprintf(cshout, "Exit %-18d", pp->p_reason); |
742 | else |
743 | (void) fprintf(cshout, "%*s", width, "Done"); |
744 | hadnl = 0; |
745 | } |
746 | break; |
747 | |
748 | default: |
749 | (void) fprintf(csherr, "BUG: status=%-9o", status); |
750 | } |
751 | } |
752 | } |
753 | prcomd: |
754 | if (flag & NAME02) { |
755 | (void) fprintf(cshout, "%s", vis_str(pp->p_command)); |
756 | if (pp->p_flags & PPOU(1<<11)) |
757 | (void) fprintf(cshout, " |"); |
758 | if (pp->p_flags & PERR(1<<10)) |
759 | (void) fputc('&', cshout); |
760 | hadnl = 0; |
761 | } |
762 | if (flag & (REASON04 | AREASON0200) && pp->p_flags & PDUMPED(1<<9)) { |
763 | (void) fprintf(cshout, " (core dumped)"); |
764 | hadnl = 0; |
765 | } |
766 | if (tp == pp->p_friends) { |
767 | if (flag & AMPERSAND010) { |
768 | (void) fprintf(cshout, " &"); |
769 | hadnl = 0; |
770 | } |
771 | if (flag & JOBDIR0100 && |
772 | !eq(tp->p_cwd->di_name, dcwd->di_name)(Strcmp(tp->p_cwd->di_name, dcwd->di_name) == 0)) { |
773 | (void) fprintf(cshout, " (wd: "); |
774 | dtildepr(value(STRhome)value1(STRhome, &shvhed), tp->p_cwd->di_name); |
775 | (void) fputc(')', cshout); |
776 | hadnl = 0; |
777 | } |
778 | } |
779 | if (pp->p_flags & PPTIME(1<<14) && !(status & (PSTOPPED(1<<1) | PRUNNING(1<<0)))) { |
780 | if (!hadnl) |
781 | (void) fprintf(cshout, "\n\t"); |
782 | prusage(&zru, &pp->p_rusage, &pp->p_etime, |
783 | &pp->p_btime); |
784 | hadnl = 1; |
785 | } |
786 | if (tp == pp->p_friends) { |
787 | if (!hadnl) { |
788 | (void) fputc('\n', cshout); |
789 | hadnl = 1; |
790 | } |
791 | if (flag & SHELLDIR040 && !eq(tp->p_cwd->di_name, dcwd->di_name)(Strcmp(tp->p_cwd->di_name, dcwd->di_name) == 0)) { |
792 | (void) fprintf(cshout, "(wd now: "); |
793 | dtildepr(value(STRhome)value1(STRhome, &shvhed), dcwd->di_name); |
794 | (void) fprintf(cshout, ")\n"); |
795 | hadnl = 1; |
796 | } |
797 | } |
798 | } while ((pp = pp->p_friends) != tp); |
799 | if (jobflags & PTIME(1<<6) && (jobflags & (PSTOPPED(1<<1) | PRUNNING(1<<0))) == 0) { |
800 | if (jobflags & NUMBER01) |
801 | (void) fprintf(cshout, " "); |
802 | ptprint(tp); |
803 | hadnl = 1; |
Value stored to 'hadnl' is never read | |
804 | } |
805 | (void) fflush(cshout); |
806 | return (jobflags); |
807 | } |
808 | |
809 | static void |
810 | ptprint(struct process *tp) |
811 | { |
812 | struct timespec tetime, diff; |
813 | static struct timespec ztime; |
814 | struct rusage ru; |
815 | static struct rusage zru; |
816 | struct process *pp = tp; |
817 | |
818 | ru = zru; |
819 | tetime = ztime; |
820 | do { |
821 | ruadd(&ru, &pp->p_rusage); |
822 | timespecsub(&pp->p_etime, &pp->p_btime, &diff)do { (&diff)->tv_sec = (&pp->p_etime)->tv_sec - (&pp->p_btime)->tv_sec; (&diff)->tv_nsec = (&pp->p_etime)->tv_nsec - (&pp->p_btime)-> tv_nsec; if ((&diff)->tv_nsec < 0) { (&diff)-> tv_sec--; (&diff)->tv_nsec += 1000000000L; } } while ( 0); |
823 | if (timespeccmp(&diff, &tetime, >)(((&diff)->tv_sec == (&tetime)->tv_sec) ? ((& diff)->tv_nsec > (&tetime)->tv_nsec) : ((&diff )->tv_sec > (&tetime)->tv_sec))) |
824 | tetime = diff; |
825 | } while ((pp = pp->p_friends) != tp); |
826 | prusage(&zru, &ru, &tetime, &ztime); |
827 | } |
828 | |
829 | /* |
830 | * dojobs - print all jobs |
831 | */ |
832 | void |
833 | dojobs(Char **v, struct command *t) |
834 | { |
835 | struct process *pp; |
836 | int flag = NUMBER01 | NAME02 | REASON04; |
837 | int i; |
838 | |
839 | if (chkstop) |
840 | chkstop = 2; |
841 | if (*++v) { |
842 | if (v[1] || !eq(*v, STRml)(Strcmp(*v, STRml) == 0)) |
843 | stderror(ERR_JOBS57); |
844 | flag |= FANCY020 | JOBDIR0100; |
845 | } |
846 | for (i = 1; i <= pmaxindex; i++) |
847 | for (pp = proclist.p_next; pp; pp = pp->p_next) |
848 | if (pp->p_index == i && pp->p_pid == pp->p_jobid) { |
849 | pp->p_flags &= ~PNEEDNOTE(1<<15); |
850 | if (!(pprint(pp, flag) & (PRUNNING(1<<0) | PSTOPPED(1<<1)))) |
851 | pflush(pp); |
852 | break; |
853 | } |
854 | } |
855 | |
856 | /* |
857 | * dofg - builtin - put the job into the foreground |
858 | */ |
859 | void |
860 | dofg(Char **v, struct command *t) |
861 | { |
862 | struct process *pp; |
863 | |
864 | okpcntl(); |
865 | ++v; |
866 | do { |
867 | pp = pfind(*v); |
868 | pstart(pp, 1); |
869 | pjwait(pp); |
870 | } while (*v && *++v); |
871 | } |
872 | |
873 | /* |
874 | * %... - builtin - put the job into the foreground |
875 | */ |
876 | void |
877 | dofg1(Char **v, struct command *t) |
878 | { |
879 | struct process *pp; |
880 | |
881 | okpcntl(); |
882 | pp = pfind(v[0]); |
883 | pstart(pp, 1); |
884 | pjwait(pp); |
885 | } |
886 | |
887 | /* |
888 | * dobg - builtin - put the job into the background |
889 | */ |
890 | void |
891 | dobg(Char **v, struct command *t) |
892 | { |
893 | struct process *pp; |
894 | |
895 | okpcntl(); |
896 | ++v; |
897 | do { |
898 | pp = pfind(*v); |
899 | pstart(pp, 0); |
900 | } while (*v && *++v); |
901 | } |
902 | |
903 | /* |
904 | * %... & - builtin - put the job into the background |
905 | */ |
906 | void |
907 | dobg1(Char **v, struct command *t) |
908 | { |
909 | struct process *pp; |
910 | |
911 | pp = pfind(v[0]); |
912 | pstart(pp, 0); |
913 | } |
914 | |
915 | /* |
916 | * dostop - builtin - stop the job |
917 | */ |
918 | void |
919 | dostop(Char **v, struct command *t) |
920 | { |
921 | pkill(++v, SIGSTOP17); |
922 | } |
923 | |
924 | /* |
925 | * dokill - builtin - superset of kill (1) |
926 | */ |
927 | void |
928 | dokill(Char **v, struct command *t) |
929 | { |
930 | int signum = SIGTERM15; |
931 | const char *errstr; |
932 | char *name; |
933 | |
934 | v++; |
935 | if (v[0] && v[0][0] == '-') { |
936 | if (v[0][1] == 'l') { |
937 | if (v[1]) { |
938 | if (!Isdigit(v[1][0])(((v[1][0]) & 0100000U) ? 0 : isdigit((unsigned char) (v[ 1][0])))) |
939 | stderror(ERR_NAME0x10000000 | ERR_BADSIG28); |
940 | |
941 | signum = strtonum(short2str(v[1]), 0, NSIG33-1, &errstr); |
942 | if (errstr) |
943 | stderror(ERR_NAME0x10000000 | ERR_BADSIG28); |
944 | else if (signum == 0) |
945 | (void) fputc('0', cshout); /* 0's symbolic name is '0' */ |
946 | else |
947 | (void) fprintf(cshout, "%s ", sys_signame[signum]); |
948 | } else { |
949 | for (signum = 1; signum < NSIG33; signum++) { |
950 | (void) fprintf(cshout, "%s ", sys_signame[signum]); |
951 | if (signum == NSIG33 / 2) |
952 | (void) fputc('\n', cshout); |
953 | } |
954 | } |
955 | (void) fputc('\n', cshout); |
956 | return; |
957 | } |
958 | if (Isdigit(v[0][1])(((v[0][1]) & 0100000U) ? 0 : isdigit((unsigned char) (v[ 0][1])))) { |
959 | signum = strtonum(short2str(v[0] + 1), 0, NSIG33-1, &errstr); |
960 | if (errstr) |
961 | stderror(ERR_NAME0x10000000 | ERR_BADSIG28); |
962 | } |
963 | else { |
964 | if (v[0][1] == 's' && (Isspace(v[0][2])(((v[0][2]) & 0100000U) ? 0 : isspace((unsigned char) (v[ 0][2]))) || v[0][2] == '\0')) { |
965 | v++; |
966 | name = short2str(&v[0][0]); |
967 | } else { |
968 | name = short2str(&v[0][1]); |
969 | } |
970 | |
971 | if (v[0] == NULL((void *)0) || v[1] == NULL((void *)0)) { |
972 | stderror(ERR_NAME0x10000000 | ERR_TOOFEW15); |
973 | return; |
974 | } |
975 | |
976 | for (signum = 1; signum < NSIG33; signum++) |
977 | if (!strcasecmp(sys_signame[signum], name) || |
978 | (strlen(name) > 3 && !strncasecmp("SIG", name, 3) && |
979 | !strcasecmp(sys_signame[signum], name + 3))) |
980 | break; |
981 | |
982 | if (signum == NSIG33) { |
983 | if (name[0] == '0') |
984 | signum = 0; |
985 | else { |
986 | setname(vis_str(&v[0][0]))(bname = (vis_str(&v[0][0]))); |
987 | stderror(ERR_NAME0x10000000 | ERR_UNKSIG29); |
988 | } |
989 | } |
990 | } |
991 | v++; |
992 | } |
993 | pkill(v, signum); |
994 | } |
995 | |
996 | static void |
997 | pkill(Char **v, int signum) |
998 | { |
999 | struct process *pp, *np; |
1000 | int jobflags = 0; |
1001 | int pid, err1 = 0; |
1002 | sigset_t sigset; |
1003 | Char *cp; |
1004 | |
1005 | sigemptyset(&sigset); |
1006 | sigaddset(&sigset, SIGCHLD20); |
1007 | if (setintr) |
1008 | sigaddset(&sigset, SIGINT2); |
1009 | sigprocmask(SIG_BLOCK1, &sigset, NULL((void *)0)); |
1010 | gflag = 0, tglob(v); |
1011 | if (gflag) { |
1012 | v = globall(v); |
1013 | if (v == 0) |
1014 | stderror(ERR_NAME0x10000000 | ERR_NOMATCH50); |
1015 | } |
1016 | else { |
1017 | v = gargv = saveblk(v); |
1018 | trim(v); |
1019 | } |
1020 | |
1021 | while (v && (cp = *v)) { |
1022 | if (*cp == '%') { |
1023 | np = pp = pfind(cp); |
1024 | do |
1025 | jobflags |= np->p_flags; |
1026 | while ((np = np->p_friends) != pp); |
1027 | switch (signum) { |
1028 | |
1029 | case SIGSTOP17: |
1030 | case SIGTSTP18: |
1031 | case SIGTTIN21: |
1032 | case SIGTTOU22: |
1033 | if ((jobflags & PRUNNING(1<<0)) == 0) { |
1034 | (void) fprintf(csherr, "%s: Already suspended\n", |
1035 | vis_str(cp)); |
1036 | err1++; |
1037 | goto cont; |
1038 | } |
1039 | break; |
1040 | /* |
1041 | * suspend a process, kill -CONT %, then type jobs; the shell |
1042 | * says it is suspended, but it is running; thanks jaap.. |
1043 | */ |
1044 | case SIGCONT19: |
1045 | pstart(pp, 0); |
1046 | goto cont; |
1047 | } |
1048 | if (kill(-pp->p_jobid, signum) == -1) { |
1049 | (void) fprintf(csherr, "%s: %s\n", vis_str(cp), |
1050 | strerror(errno(*__errno()))); |
1051 | err1++; |
1052 | } |
1053 | if (signum == SIGTERM15 || signum == SIGHUP1) |
1054 | (void) kill(-pp->p_jobid, SIGCONT19); |
1055 | } |
1056 | else if (!(Isdigit(*cp)(((*cp) & 0100000U) ? 0 : isdigit((unsigned char) (*cp))) || *cp == '-')) |
1057 | stderror(ERR_NAME0x10000000 | ERR_JOBARGS58); |
1058 | else { |
1059 | char *ep; |
1060 | char *pidnam = short2str(cp); |
1061 | |
1062 | pid = strtol(pidnam, &ep, 10); |
1063 | if (!*pidnam || *ep) { |
1064 | (void) fprintf(csherr, "%s: illegal process id\n", pidnam); |
1065 | err1++; |
1066 | goto cont; |
1067 | } |
1068 | if (kill((pid_t) pid, signum) == -1) { |
1069 | (void) fprintf(csherr, "%d: %s\n", pid, strerror(errno(*__errno()))); |
1070 | err1++; |
1071 | goto cont; |
1072 | } |
1073 | if (signum == SIGTERM15 || signum == SIGHUP1) |
1074 | (void) kill((pid_t) pid, SIGCONT19); |
1075 | } |
1076 | cont: |
1077 | v++; |
1078 | } |
1079 | blkfree(gargv); |
1080 | gargv = NULL((void *)0); |
1081 | sigprocmask(SIG_UNBLOCK2, &sigset, NULL((void *)0)); |
1082 | if (err1) |
1083 | stderror(ERR_SILENT0x20000000); |
1084 | } |
1085 | |
1086 | /* |
1087 | * pstart - start the job in foreground/background |
1088 | */ |
1089 | void |
1090 | pstart(struct process *pp, int foregnd) |
1091 | { |
1092 | struct process *np; |
1093 | sigset_t sigset, osigset; |
1094 | long jobflags = 0; |
1095 | |
1096 | sigemptyset(&sigset); |
1097 | sigaddset(&sigset, SIGCHLD20); |
1098 | sigprocmask(SIG_BLOCK1, &sigset, &osigset); |
1099 | np = pp; |
1100 | do { |
1101 | jobflags |= np->p_flags; |
1102 | if (np->p_flags & (PRUNNING(1<<0) | PSTOPPED(1<<1))) { |
1103 | np->p_flags |= PRUNNING(1<<0); |
1104 | np->p_flags &= ~PSTOPPED(1<<1); |
1105 | if (foregnd) |
1106 | np->p_flags |= PFOREGND(1<<8); |
1107 | else |
1108 | np->p_flags &= ~PFOREGND(1<<8); |
1109 | } |
1110 | } while ((np = np->p_friends) != pp); |
1111 | if (!foregnd) |
1112 | pclrcurr(pp); |
1113 | (void) pprint(pp, foregnd ? NAME02 | JOBDIR0100 : NUMBER01 | NAME02 | AMPERSAND010); |
1114 | if (foregnd) |
1115 | (void) tcsetpgrp(FSHTTY15, pp->p_jobid); |
1116 | if (jobflags & PSTOPPED(1<<1)) |
1117 | (void) kill(-pp->p_jobid, SIGCONT19); |
1118 | sigprocmask(SIG_SETMASK3, &osigset, NULL((void *)0)); |
1119 | } |
1120 | |
1121 | void |
1122 | panystop(bool neednl) |
1123 | { |
1124 | struct process *pp; |
1125 | |
1126 | chkstop = 2; |
1127 | for (pp = proclist.p_next; pp; pp = pp->p_next) |
1128 | if (pp->p_flags & PSTOPPED(1<<1)) |
1129 | stderror(ERR_STOPPED65, neednl ? "\n" : ""); |
1130 | } |
1131 | |
1132 | struct process * |
1133 | pfind(Char *cp) |
1134 | { |
1135 | struct process *pp, *np; |
1136 | |
1137 | if (cp == 0 || cp[1] == 0 || eq(cp, STRcent2)(Strcmp(cp, STRcent2) == 0) || eq(cp, STRcentplus)(Strcmp(cp, STRcentplus) == 0)) { |
1138 | if (pcurrent == NULL((void *)0)) |
1139 | stderror(ERR_NAME0x10000000 | ERR_JOBCUR59); |
1140 | return (pcurrent); |
1141 | } |
1142 | if (eq(cp, STRcentminus)(Strcmp(cp, STRcentminus) == 0) || eq(cp, STRcenthash)(Strcmp(cp, STRcenthash) == 0)) { |
1143 | if (pprevious == NULL((void *)0)) |
1144 | stderror(ERR_NAME0x10000000 | ERR_JOBPREV60); |
1145 | return (pprevious); |
1146 | } |
1147 | if (Isdigit(cp[1])(((cp[1]) & 0100000U) ? 0 : isdigit((unsigned char) (cp[1 ])))) { |
1148 | const char *errstr; |
1149 | int idx = strtonum(short2str(cp + 1), 1, INT_MAX0x7fffffff, &errstr); |
1150 | |
1151 | if (errstr) { |
1152 | stderror(ERR_NAME0x10000000 | ERR_NOSUCHJOB46); |
1153 | return (0); |
1154 | } |
1155 | for (pp = proclist.p_next; pp; pp = pp->p_next) |
1156 | if (pp->p_index == idx && pp->p_pid == pp->p_jobid) |
1157 | return (pp); |
1158 | stderror(ERR_NAME0x10000000 | ERR_NOSUCHJOB46); |
1159 | return (0); |
1160 | } |
1161 | np = NULL((void *)0); |
1162 | for (pp = proclist.p_next; pp; pp = pp->p_next) |
1163 | if (pp->p_pid == pp->p_jobid) { |
1164 | if (cp[1] == '?') { |
1165 | Char *dp; |
1166 | |
1167 | for (dp = pp->p_command; *dp; dp++) { |
1168 | if (*dp != cp[2]) |
1169 | continue; |
1170 | if (prefix(cp + 2, dp)) |
1171 | goto match; |
1172 | } |
1173 | } |
1174 | else if (prefix(cp + 1, pp->p_command)) { |
1175 | match: |
1176 | if (np) |
1177 | stderror(ERR_NAME0x10000000 | ERR_AMBIG40); |
1178 | np = pp; |
1179 | } |
1180 | } |
1181 | if (np) |
1182 | return (np); |
1183 | stderror(ERR_NAME0x10000000 | (cp[1] == '?' ? ERR_JOBPAT61 : ERR_NOSUCHJOB46)); |
1184 | /* NOTREACHED */ |
1185 | return (0); |
1186 | } |
1187 | |
1188 | |
1189 | /* |
1190 | * pgetcurr - find most recent job that is not pp, preferably stopped |
1191 | */ |
1192 | static struct process * |
1193 | pgetcurr(struct process *pp) |
1194 | { |
1195 | struct process *np; |
1196 | struct process *xp = NULL((void *)0); |
1197 | |
1198 | for (np = proclist.p_next; np; np = np->p_next) |
1199 | if (np != pcurrent && np != pp && np->p_pid && |
1200 | np->p_pid == np->p_jobid) { |
1201 | if (np->p_flags & PSTOPPED(1<<1)) |
1202 | return (np); |
1203 | if (xp == NULL((void *)0)) |
1204 | xp = np; |
1205 | } |
1206 | return (xp); |
1207 | } |
1208 | |
1209 | /* |
1210 | * donotify - flag the job so as to report termination asynchronously |
1211 | */ |
1212 | void |
1213 | donotify(Char **v, struct command *t) |
1214 | { |
1215 | struct process *pp; |
1216 | |
1217 | pp = pfind(*++v); |
1218 | pp->p_flags |= PNOTIFY(1<<5); |
1219 | } |
1220 | |
1221 | /* |
1222 | * Do the fork and whatever should be done in the child side that |
1223 | * should not be done if we are not forking at all (like for simple builtin's) |
1224 | * Also do everything that needs any signals fiddled with in the parent side |
1225 | * |
1226 | * Wanttty tells whether process and/or tty pgrps are to be manipulated: |
1227 | * -1: leave tty alone; inherit pgrp from parent |
1228 | * 0: already have tty; manipulate process pgrps only |
1229 | * 1: want to claim tty; manipulate process and tty pgrps |
1230 | * It is usually just the value of tpgrp. |
1231 | */ |
1232 | |
1233 | int |
1234 | pfork(struct command *t, int wanttty) |
1235 | { |
1236 | int pid; |
1237 | bool ignint = 0; |
1238 | int pgrp; |
1239 | sigset_t sigset, osigset; |
1240 | |
1241 | /* |
1242 | * A child will be uninterruptible only under very special conditions. |
1243 | * Remember that the semantics of '&' is implemented by disconnecting the |
1244 | * process from the tty so signals do not need to ignored just for '&'. |
1245 | * Thus signals are set to default action for children unless: we have had |
1246 | * an "onintr -" (then specifically ignored) we are not playing with |
1247 | * signals (inherit action) |
1248 | */ |
1249 | if (setintr) |
1250 | ignint = (tpgrp == -1 && (t->t_dflg & F_NOINTERRUPT(1<<5))) |
1251 | || (gointr && eq(gointr, STRminus)(Strcmp(gointr, STRminus) == 0)); |
1252 | /* |
1253 | * Check for maximum nesting of 16 processes to avoid Forking loops |
1254 | */ |
1255 | if (child == 16) |
1256 | stderror(ERR_NESTING62, 16); |
1257 | /* |
1258 | * Hold SIGCHLD until we have the process installed in our table. |
1259 | */ |
1260 | sigemptyset(&sigset); |
1261 | sigaddset(&sigset, SIGCHLD20); |
1262 | sigprocmask(SIG_BLOCK1, &sigset, &osigset); |
1263 | while ((pid = fork()) == -1) |
1264 | if (setintr == 0) |
1265 | (void) sleep(FORKSLEEP10); |
1266 | else { |
1267 | sigprocmask(SIG_SETMASK3, &osigset, NULL((void *)0)); |
1268 | stderror(ERR_NOPROC49); |
1269 | } |
1270 | if (pid == 0) { |
1271 | settimes(); |
1272 | pgrp = pcurrjob ? pcurrjob->p_jobid : getpid(); |
1273 | pflushall(); |
1274 | pcurrjob = NULL((void *)0); |
1275 | child++; |
1276 | if (setintr) { |
1277 | setintr = 0; /* until I think otherwise */ |
1278 | /* |
1279 | * Children just get blown away on SIGINT, SIGQUIT unless "onintr |
1280 | * -" seen. |
1281 | */ |
1282 | (void) signal(SIGINT2, ignint ? SIG_IGN(void (*)(int))1 : SIG_DFL(void (*)(int))0); |
1283 | (void) signal(SIGQUIT3, ignint ? SIG_IGN(void (*)(int))1 : SIG_DFL(void (*)(int))0); |
1284 | if (wanttty >= 0) { |
1285 | /* make stoppable */ |
1286 | (void) signal(SIGTSTP18, SIG_DFL(void (*)(int))0); |
1287 | (void) signal(SIGTTIN21, SIG_DFL(void (*)(int))0); |
1288 | (void) signal(SIGTTOU22, SIG_DFL(void (*)(int))0); |
1289 | } |
1290 | (void) signal(SIGTERM15, parterm); |
1291 | } |
1292 | else if (tpgrp == -1 && (t->t_dflg & F_NOINTERRUPT(1<<5))) { |
1293 | (void) signal(SIGINT2, SIG_IGN(void (*)(int))1); |
1294 | (void) signal(SIGQUIT3, SIG_IGN(void (*)(int))1); |
1295 | } |
1296 | pgetty(wanttty, pgrp); |
1297 | /* |
1298 | * Nohup and nice apply only to NODE_COMMAND's but it would be nice |
1299 | * (?!?) if you could say "nohup (foo;bar)" Then the parser would have |
1300 | * to know about nice/nohup/time |
1301 | */ |
1302 | if (t->t_dflg & F_NOHUP(1<<12)) |
1303 | (void) signal(SIGHUP1, SIG_IGN(void (*)(int))1); |
1304 | if (t->t_dflg & F_NICE(1<<11)) |
1305 | (void) setpriority(PRIO_PROCESS0, 0, t->t_nice); |
1306 | } |
1307 | else { |
1308 | if (wanttty >= 0) |
1309 | (void) setpgid(pid, pcurrjob ? pcurrjob->p_jobid : pid); |
1310 | palloc(pid, t); |
1311 | sigprocmask(SIG_SETMASK3, &osigset, NULL((void *)0)); |
1312 | } |
1313 | |
1314 | return (pid); |
1315 | } |
1316 | |
1317 | static void |
1318 | okpcntl(void) |
1319 | { |
1320 | if (tpgrp == -1) |
1321 | stderror(ERR_JOBCONTROL33); |
1322 | if (tpgrp == 0) |
1323 | stderror(ERR_JOBCTRLSUB63); |
1324 | } |
1325 | |
1326 | /* |
1327 | * if we don't have vfork(), things can still go in the wrong order |
1328 | * resulting in the famous 'Stopped (tty output)'. But some systems |
1329 | * don't permit the setpgid() call, (these are more recent secure |
1330 | * systems such as ibm's aix). Then we'd rather print an error message |
1331 | * than hang the shell! |
1332 | * I am open to suggestions how to fix that. |
1333 | */ |
1334 | void |
1335 | pgetty(int wanttty, int pgrp) |
1336 | { |
1337 | sigset_t sigset, osigset; |
1338 | |
1339 | /* |
1340 | * christos: I am blocking the tty signals till I've set things |
1341 | * correctly.... |
1342 | */ |
1343 | if (wanttty > 0) { |
1344 | sigemptyset(&sigset); |
1345 | sigaddset(&sigset, SIGTSTP18); |
1346 | sigaddset(&sigset, SIGTTIN21); |
1347 | sigaddset(&sigset, SIGTTOU22); |
1348 | sigprocmask(SIG_BLOCK1, &sigset, &osigset); |
1349 | } |
1350 | /* |
1351 | * From: Michael Schroeder <mlschroe@immd4.informatik.uni-erlangen.de> |
1352 | * Don't check for tpgrp >= 0 so even non-interactive shells give |
1353 | * background jobs process groups Same for the comparison in the other part |
1354 | * of the #ifdef |
1355 | */ |
1356 | if (wanttty >= 0) |
1357 | if (setpgid(0, pgrp) == -1) { |
1358 | (void) fprintf(csherr, "csh: setpgid error.\n"); |
1359 | xexit(0); |
1360 | } |
1361 | |
1362 | if (wanttty > 0) { |
1363 | (void) tcsetpgrp(FSHTTY15, pgrp); |
1364 | sigprocmask(SIG_SETMASK3, &osigset, NULL((void *)0)); |
1365 | } |
1366 | |
1367 | if (tpgrp > 0) |
1368 | tpgrp = 0; /* gave tty away */ |
1369 | } |