| File: | src/bin/csh/proc.c |
| Warning: | line 804, column 2 Value stored to 'hadnl' is never read |
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| 1 | /* $OpenBSD: proc.c,v 1.34 2020/08/30 22:23:47 mortimer 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) ? WNOHANG1 | WUNTRACED2 : WNOHANG1), &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 | /*ARGSUSED*/ |
| 348 | dowait(Char **v, struct command *t) |
| 349 | { |
| 350 | struct process *pp; |
| 351 | sigset_t sigset, osigset; |
| 352 | |
| 353 | pjobs++; |
| 354 | sigemptyset(&sigset); |
| 355 | sigaddset(&sigset, SIGCHLD20); |
| 356 | sigprocmask(SIG_BLOCK1, &sigset, &osigset); |
| 357 | loop: |
| 358 | for (pp = proclist.p_next; pp; pp = pp->p_next) |
| 359 | if (pp->p_pid && /* pp->p_pid == pp->p_jobid && */ |
| 360 | pp->p_flags & PRUNNING(1<<0)) { |
| 361 | sigemptyset(&sigset); |
| 362 | sigsuspend(&sigset); |
| 363 | goto loop; |
| 364 | } |
| 365 | sigprocmask(SIG_SETMASK3, &osigset, NULL((void *)0)); |
| 366 | pjobs = 0; |
| 367 | } |
| 368 | |
| 369 | /* |
| 370 | * pflushall - flush all jobs from list (e.g. at fork()) |
| 371 | */ |
| 372 | static void |
| 373 | pflushall(void) |
| 374 | { |
| 375 | struct process *pp; |
| 376 | |
| 377 | for (pp = proclist.p_next; pp != NULL((void *)0); pp = pp->p_next) |
| 378 | if (pp->p_pid) |
| 379 | pflush(pp); |
| 380 | } |
| 381 | |
| 382 | /* |
| 383 | * pflush - flag all process structures in the same job as the |
| 384 | * the argument process for deletion. The actual free of the |
| 385 | * space is not done here since pflush is called at interrupt level. |
| 386 | */ |
| 387 | static void |
| 388 | pflush(struct process *pp) |
| 389 | { |
| 390 | struct process *np; |
| 391 | int idx; |
| 392 | |
| 393 | if (pp->p_pid == 0) { |
| 394 | (void) fprintf(csherr, "BUG: process flushed twice"); |
| 395 | return; |
| 396 | } |
| 397 | while (pp->p_pid != pp->p_jobid) |
| 398 | pp = pp->p_friends; |
| 399 | pclrcurr(pp); |
| 400 | if (pp == pcurrjob) |
| 401 | pcurrjob = 0; |
| 402 | idx = pp->p_index; |
| 403 | np = pp; |
| 404 | do { |
| 405 | np->p_index = np->p_pid = 0; |
| 406 | np->p_flags &= ~PNEEDNOTE(1<<15); |
| 407 | } while ((np = np->p_friends) != pp); |
| 408 | if (idx == pmaxindex) { |
| 409 | for (np = proclist.p_next, idx = 0; np; np = np->p_next) |
| 410 | if (np->p_index > idx) |
| 411 | idx = np->p_index; |
| 412 | pmaxindex = idx; |
| 413 | } |
| 414 | } |
| 415 | |
| 416 | /* |
| 417 | * pclrcurr - make sure the given job is not the current or previous job; |
| 418 | * pp MUST be the job leader |
| 419 | */ |
| 420 | static void |
| 421 | pclrcurr(struct process *pp) |
| 422 | { |
| 423 | |
| 424 | if (pp == pcurrent) |
| 425 | if (pprevious != NULL((void *)0)) { |
| 426 | pcurrent = pprevious; |
| 427 | pprevious = pgetcurr(pp); |
| 428 | } |
| 429 | else { |
| 430 | pcurrent = pgetcurr(pp); |
| 431 | pprevious = pgetcurr(pp); |
| 432 | } |
| 433 | else if (pp == pprevious) |
| 434 | pprevious = pgetcurr(pp); |
| 435 | } |
| 436 | |
| 437 | /* +4 here is 1 for '\0', 1 ea for << >& >> */ |
| 438 | static Char command[PMAXLEN80 + 4]; |
| 439 | static int cmdlen; |
| 440 | static Char *cmdp; |
| 441 | |
| 442 | /* |
| 443 | * palloc - allocate a process structure and fill it up. |
| 444 | * an important assumption is made that the process is running. |
| 445 | */ |
| 446 | void |
| 447 | palloc(int pid, struct command *t) |
| 448 | { |
| 449 | struct process *pp; |
| 450 | int i; |
| 451 | |
| 452 | pp = xcalloc(1, (size_t) sizeof(struct process)); |
| 453 | pp->p_pid = pid; |
| 454 | pp->p_flags = t->t_dflg & F_AMPERSAND(1<<0) ? PRUNNING(1<<0) : PRUNNING(1<<0) | PFOREGND(1<<8); |
| 455 | if (t->t_dflg & F_TIME(1<<13)) |
| 456 | pp->p_flags |= PPTIME(1<<14); |
| 457 | cmdp = command; |
| 458 | cmdlen = 0; |
| 459 | padd(t); |
| 460 | *cmdp++ = 0; |
| 461 | if (t->t_dflg & F_PIPEOUT(1<<3)) { |
| 462 | pp->p_flags |= PPOU(1<<11); |
| 463 | if (t->t_dflg & F_STDERR(1<<7)) |
| 464 | pp->p_flags |= PERR(1<<10); |
| 465 | } |
| 466 | pp->p_command = Strsave(command); |
| 467 | if (pcurrjob) { |
| 468 | struct process *fp; |
| 469 | |
| 470 | /* careful here with interrupt level */ |
| 471 | pp->p_cwd = 0; |
| 472 | pp->p_index = pcurrjob->p_index; |
| 473 | pp->p_friends = pcurrjob; |
| 474 | pp->p_jobid = pcurrjob->p_pid; |
| 475 | for (fp = pcurrjob; fp->p_friends != pcurrjob; fp = fp->p_friends) |
| 476 | continue; |
| 477 | fp->p_friends = pp; |
| 478 | } |
| 479 | else { |
| 480 | pcurrjob = pp; |
| 481 | pp->p_jobid = pid; |
| 482 | pp->p_friends = pp; |
| 483 | pp->p_cwd = dcwd; |
| 484 | dcwd->di_count++; |
| 485 | if (pmaxindex < BIGINDEX9) |
| 486 | pp->p_index = ++pmaxindex; |
| 487 | else { |
| 488 | struct process *np; |
| 489 | |
| 490 | for (i = 1;; i++) { |
| 491 | for (np = proclist.p_next; np; np = np->p_next) |
| 492 | if (np->p_index == i) |
| 493 | goto tryagain; |
| 494 | pp->p_index = i; |
| 495 | if (i > pmaxindex) |
| 496 | pmaxindex = i; |
| 497 | break; |
| 498 | tryagain:; |
| 499 | } |
| 500 | } |
| 501 | if (pcurrent == NULL((void *)0)) |
| 502 | pcurrent = pp; |
| 503 | else if (pprevious == NULL((void *)0)) |
| 504 | pprevious = pp; |
| 505 | } |
| 506 | pp->p_next = proclist.p_next; |
| 507 | proclist.p_next = pp; |
| 508 | (void) clock_gettime(CLOCK_MONOTONIC3, &pp->p_btime); |
| 509 | } |
| 510 | |
| 511 | static void |
| 512 | padd(struct command *t) |
| 513 | { |
| 514 | Char **argp; |
| 515 | |
| 516 | if (t == 0) |
| 517 | return; |
| 518 | switch (t->t_dtyp) { |
| 519 | |
| 520 | case NODE_PAREN2: |
| 521 | pads(STRLparensp); |
| 522 | padd(t->t_dspr); |
| 523 | pads(STRspRparen); |
| 524 | break; |
| 525 | |
| 526 | case NODE_COMMAND1: |
| 527 | for (argp = t->t_dcom; *argp; argp++) { |
| 528 | pads(*argp); |
| 529 | if (argp[1]) |
| 530 | pads(STRspace); |
| 531 | } |
| 532 | break; |
| 533 | |
| 534 | case NODE_OR5: |
| 535 | case NODE_AND6: |
| 536 | case NODE_PIPE3: |
| 537 | case NODE_LIST4: |
| 538 | padd(t->t_dcarL.T_dcar); |
| 539 | switch (t->t_dtyp) { |
| 540 | case NODE_OR5: |
| 541 | pads(STRspor2sp); |
| 542 | break; |
| 543 | case NODE_AND6: |
| 544 | pads(STRspand2sp); |
| 545 | break; |
| 546 | case NODE_PIPE3: |
| 547 | pads(STRsporsp); |
| 548 | break; |
| 549 | case NODE_LIST4: |
| 550 | pads(STRsemisp); |
| 551 | break; |
| 552 | } |
| 553 | padd(t->t_dcdrR.T_dcdr); |
| 554 | return; |
| 555 | } |
| 556 | if ((t->t_dflg & F_PIPEIN(1<<2)) == 0 && t->t_dlefL.T_dlef) { |
| 557 | pads((t->t_dflg & F_READ(1<<9)) ? STRspLarrow2sp : STRspLarrowsp); |
| 558 | pads(t->t_dlefL.T_dlef); |
| 559 | } |
| 560 | if ((t->t_dflg & F_PIPEOUT(1<<3)) == 0 && t->t_dritR.T_drit) { |
| 561 | pads((t->t_dflg & F_APPEND(1<<1)) ? STRspRarrow2 : STRspRarrow); |
| 562 | if (t->t_dflg & F_STDERR(1<<7)) |
| 563 | pads(STRand); |
| 564 | pads(STRspace); |
| 565 | pads(t->t_dritR.T_drit); |
| 566 | } |
| 567 | } |
| 568 | |
| 569 | static void |
| 570 | pads(Char *cp) |
| 571 | { |
| 572 | int i; |
| 573 | |
| 574 | /* |
| 575 | * Avoid the Quoted Space alias hack! Reported by: |
| 576 | * sam@john-bigboote.ICS.UCI.EDU (Sam Horrocks) |
| 577 | */ |
| 578 | if (cp[0] == STRQNULL[0]) |
| 579 | cp++; |
| 580 | |
| 581 | i = Strlen(cp); |
| 582 | |
| 583 | if (cmdlen >= PMAXLEN80) |
| 584 | return; |
| 585 | if (cmdlen + i >= PMAXLEN80) { |
| 586 | (void) Strlcpy(cmdp, STRsp3dots, PMAXLEN80 - cmdlen); |
| 587 | cmdlen = PMAXLEN80; |
| 588 | cmdp += 4; |
| 589 | return; |
| 590 | } |
| 591 | (void) Strlcpy(cmdp, cp, PMAXLEN80 - cmdlen); |
| 592 | cmdp += i; |
| 593 | cmdlen += i; |
| 594 | } |
| 595 | |
| 596 | /* |
| 597 | * psavejob - temporarily save the current job on a one level stack |
| 598 | * so another job can be created. Used for { } in exp6 |
| 599 | * and `` in globbing. |
| 600 | */ |
| 601 | void |
| 602 | psavejob(void) |
| 603 | { |
| 604 | |
| 605 | pholdjob = pcurrjob; |
| 606 | pcurrjob = NULL((void *)0); |
| 607 | } |
| 608 | |
| 609 | /* |
| 610 | * prestjob - opposite of psavejob. This may be missed if we are interrupted |
| 611 | * somewhere, but pendjob cleans up anyway. |
| 612 | */ |
| 613 | void |
| 614 | prestjob(void) |
| 615 | { |
| 616 | |
| 617 | pcurrjob = pholdjob; |
| 618 | pholdjob = NULL((void *)0); |
| 619 | } |
| 620 | |
| 621 | /* |
| 622 | * pendjob - indicate that a job (set of commands) has been completed |
| 623 | * or is about to begin. |
| 624 | */ |
| 625 | void |
| 626 | pendjob(void) |
| 627 | { |
| 628 | struct process *pp, *tp; |
| 629 | |
| 630 | if (pcurrjob && (pcurrjob->p_flags & (PFOREGND(1<<8) | PSTOPPED(1<<1))) == 0) { |
| 631 | pp = pcurrjob; |
| 632 | while (pp->p_pid != pp->p_jobid) |
| 633 | pp = pp->p_friends; |
| 634 | (void) fprintf(cshout, "[%d]", pp->p_index); |
| 635 | tp = pp; |
| 636 | do { |
| 637 | (void) fprintf(cshout, " %d", pp->p_pid); |
| 638 | pp = pp->p_friends; |
| 639 | } while (pp != tp); |
| 640 | (void) fputc('\n', cshout); |
| 641 | } |
| 642 | pholdjob = pcurrjob = 0; |
| 643 | } |
| 644 | |
| 645 | /* |
| 646 | * pprint - print a job |
| 647 | */ |
| 648 | static int |
| 649 | pprint(struct process *pp, bool flag) |
| 650 | { |
| 651 | int status, reason; |
| 652 | struct process *tp; |
| 653 | int jobflags, pstatus; |
| 654 | bool hadnl = 1; /* did we just have a newline */ |
| 655 | |
| 656 | (void) fpurge(cshout); |
| 657 | |
| 658 | while (pp->p_pid != pp->p_jobid) |
| 659 | pp = pp->p_friends; |
| 660 | if (pp == pp->p_friends && (pp->p_flags & PPTIME(1<<14))) { |
| 661 | pp->p_flags &= ~PPTIME(1<<14); |
| 662 | pp->p_flags |= PTIME(1<<6); |
| 663 | } |
| 664 | tp = pp; |
| 665 | status = reason = -1; |
| 666 | jobflags = 0; |
| 667 | do { |
| 668 | jobflags |= pp->p_flags; |
| 669 | pstatus = pp->p_flags & PALLSTATES((1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<< 4)|(1<<13)); |
| 670 | if (tp != pp && !hadnl && !(flag & FANCY020) && |
| 671 | ((pstatus == status && pp->p_reason == reason) || |
| 672 | !(flag & REASON04))) { |
| 673 | (void) fputc(' ', cshout); |
| 674 | hadnl = 0; |
| 675 | } |
| 676 | else { |
| 677 | if (tp != pp && !hadnl) { |
| 678 | (void) fputc('\n', cshout); |
| 679 | hadnl = 1; |
| 680 | } |
| 681 | if (flag & NUMBER01) { |
| 682 | if (pp == tp) |
| 683 | (void) fprintf(cshout, "[%d]%s %c ", pp->p_index, |
| 684 | pp->p_index < 10 ? " " : "", |
| 685 | pp == pcurrent ? '+' : |
| 686 | (pp == pprevious ? '-' : ' ')); |
| 687 | else |
| 688 | (void) fprintf(cshout, " "); |
| 689 | hadnl = 0; |
| 690 | } |
| 691 | if (flag & FANCY020) { |
| 692 | (void) fprintf(cshout, "%5d ", pp->p_pid); |
| 693 | hadnl = 0; |
| 694 | } |
| 695 | if (flag & (REASON04 | AREASON0200)) { |
| 696 | int width = 0; |
| 697 | if (flag & NAME02) |
| 698 | width = -23; |
| 699 | if (pstatus == status) |
| 700 | if (pp->p_reason == reason) { |
| 701 | (void) fprintf(cshout, "%*s", width, ""); |
| 702 | hadnl = 0; |
| 703 | goto prcomd; |
| 704 | } |
| 705 | else |
| 706 | reason = pp->p_reason; |
| 707 | else { |
| 708 | status = pstatus; |
| 709 | reason = pp->p_reason; |
| 710 | } |
| 711 | switch (status) { |
| 712 | |
| 713 | case PRUNNING(1<<0): |
| 714 | (void) fprintf(cshout, "%*s", width, "Running "); |
| 715 | hadnl = 0; |
| 716 | break; |
| 717 | |
| 718 | case PINTERRUPTED(1<<13): |
| 719 | case PSTOPPED(1<<1): |
| 720 | case PSIGNALED(1<<4): |
| 721 | /* |
| 722 | * tell what happened to the background job |
| 723 | * From: Michael Schroeder |
| 724 | * <mlschroe@immd4.informatik.uni-erlangen.de> |
| 725 | */ |
| 726 | if ((flag & REASON04) |
| 727 | || ((flag & AREASON0200) |
| 728 | && reason != SIGINT2 |
| 729 | && (reason != SIGPIPE13 |
| 730 | || (pp->p_flags & PPOU(1<<11)) == 0))) { |
| 731 | (void) fprintf(cshout, "%*s", width, |
| 732 | sys_siglist[(unsigned char) |
| 733 | pp->p_reason]); |
| 734 | hadnl = 0; |
| 735 | } |
| 736 | break; |
| 737 | |
| 738 | case PNEXITED(1<<2): |
| 739 | case PAEXITED(1<<3): |
| 740 | if (flag & REASON04) { |
| 741 | if (pp->p_reason) |
| 742 | (void) fprintf(cshout, "Exit %-18d", pp->p_reason); |
| 743 | else |
| 744 | (void) fprintf(cshout, "%*s", width, "Done"); |
| 745 | hadnl = 0; |
| 746 | } |
| 747 | break; |
| 748 | |
| 749 | default: |
| 750 | (void) fprintf(csherr, "BUG: status=%-9o", status); |
| 751 | } |
| 752 | } |
| 753 | } |
| 754 | prcomd: |
| 755 | if (flag & NAME02) { |
| 756 | (void) fprintf(cshout, "%s", vis_str(pp->p_command)); |
| 757 | if (pp->p_flags & PPOU(1<<11)) |
| 758 | (void) fprintf(cshout, " |"); |
| 759 | if (pp->p_flags & PERR(1<<10)) |
| 760 | (void) fputc('&', cshout); |
| 761 | hadnl = 0; |
| 762 | } |
| 763 | if (flag & (REASON04 | AREASON0200) && pp->p_flags & PDUMPED(1<<9)) { |
| 764 | (void) fprintf(cshout, " (core dumped)"); |
| 765 | hadnl = 0; |
| 766 | } |
| 767 | if (tp == pp->p_friends) { |
| 768 | if (flag & AMPERSAND010) { |
| 769 | (void) fprintf(cshout, " &"); |
| 770 | hadnl = 0; |
| 771 | } |
| 772 | if (flag & JOBDIR0100 && |
| 773 | !eq(tp->p_cwd->di_name, dcwd->di_name)(Strcmp(tp->p_cwd->di_name, dcwd->di_name) == 0)) { |
| 774 | (void) fprintf(cshout, " (wd: "); |
| 775 | dtildepr(value(STRhome)value1(STRhome, &shvhed), tp->p_cwd->di_name); |
| 776 | (void) fputc(')', cshout); |
| 777 | hadnl = 0; |
| 778 | } |
| 779 | } |
| 780 | if (pp->p_flags & PPTIME(1<<14) && !(status & (PSTOPPED(1<<1) | PRUNNING(1<<0)))) { |
| 781 | if (!hadnl) |
| 782 | (void) fprintf(cshout, "\n\t"); |
| 783 | prusage(&zru, &pp->p_rusage, &pp->p_etime, |
| 784 | &pp->p_btime); |
| 785 | hadnl = 1; |
| 786 | } |
| 787 | if (tp == pp->p_friends) { |
| 788 | if (!hadnl) { |
| 789 | (void) fputc('\n', cshout); |
| 790 | hadnl = 1; |
| 791 | } |
| 792 | if (flag & SHELLDIR040 && !eq(tp->p_cwd->di_name, dcwd->di_name)(Strcmp(tp->p_cwd->di_name, dcwd->di_name) == 0)) { |
| 793 | (void) fprintf(cshout, "(wd now: "); |
| 794 | dtildepr(value(STRhome)value1(STRhome, &shvhed), dcwd->di_name); |
| 795 | (void) fprintf(cshout, ")\n"); |
| 796 | hadnl = 1; |
| 797 | } |
| 798 | } |
| 799 | } while ((pp = pp->p_friends) != tp); |
| 800 | if (jobflags & PTIME(1<<6) && (jobflags & (PSTOPPED(1<<1) | PRUNNING(1<<0))) == 0) { |
| 801 | if (jobflags & NUMBER01) |
| 802 | (void) fprintf(cshout, " "); |
| 803 | ptprint(tp); |
| 804 | hadnl = 1; |
Value stored to 'hadnl' is never read | |
| 805 | } |
| 806 | (void) fflush(cshout); |
| 807 | return (jobflags); |
| 808 | } |
| 809 | |
| 810 | static void |
| 811 | ptprint(struct process *tp) |
| 812 | { |
| 813 | struct timespec tetime, diff; |
| 814 | static struct timespec ztime; |
| 815 | struct rusage ru; |
| 816 | static struct rusage zru; |
| 817 | struct process *pp = tp; |
| 818 | |
| 819 | ru = zru; |
| 820 | tetime = ztime; |
| 821 | do { |
| 822 | ruadd(&ru, &pp->p_rusage); |
| 823 | 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); |
| 824 | if (timespeccmp(&diff, &tetime, >)(((&diff)->tv_sec == (&tetime)->tv_sec) ? ((& diff)->tv_nsec > (&tetime)->tv_nsec) : ((&diff )->tv_sec > (&tetime)->tv_sec))) |
| 825 | tetime = diff; |
| 826 | } while ((pp = pp->p_friends) != tp); |
| 827 | prusage(&zru, &ru, &tetime, &ztime); |
| 828 | } |
| 829 | |
| 830 | /* |
| 831 | * dojobs - print all jobs |
| 832 | */ |
| 833 | void |
| 834 | /*ARGSUSED*/ |
| 835 | dojobs(Char **v, struct command *t) |
| 836 | { |
| 837 | struct process *pp; |
| 838 | int flag = NUMBER01 | NAME02 | REASON04; |
| 839 | int i; |
| 840 | |
| 841 | if (chkstop) |
| 842 | chkstop = 2; |
| 843 | if (*++v) { |
| 844 | if (v[1] || !eq(*v, STRml)(Strcmp(*v, STRml) == 0)) |
| 845 | stderror(ERR_JOBS57); |
| 846 | flag |= FANCY020 | JOBDIR0100; |
| 847 | } |
| 848 | for (i = 1; i <= pmaxindex; i++) |
| 849 | for (pp = proclist.p_next; pp; pp = pp->p_next) |
| 850 | if (pp->p_index == i && pp->p_pid == pp->p_jobid) { |
| 851 | pp->p_flags &= ~PNEEDNOTE(1<<15); |
| 852 | if (!(pprint(pp, flag) & (PRUNNING(1<<0) | PSTOPPED(1<<1)))) |
| 853 | pflush(pp); |
| 854 | break; |
| 855 | } |
| 856 | } |
| 857 | |
| 858 | /* |
| 859 | * dofg - builtin - put the job into the foreground |
| 860 | */ |
| 861 | void |
| 862 | /*ARGSUSED*/ |
| 863 | dofg(Char **v, struct command *t) |
| 864 | { |
| 865 | struct process *pp; |
| 866 | |
| 867 | okpcntl(); |
| 868 | ++v; |
| 869 | do { |
| 870 | pp = pfind(*v); |
| 871 | pstart(pp, 1); |
| 872 | pjwait(pp); |
| 873 | } while (*v && *++v); |
| 874 | } |
| 875 | |
| 876 | /* |
| 877 | * %... - builtin - put the job into the foreground |
| 878 | */ |
| 879 | void |
| 880 | /*ARGSUSED*/ |
| 881 | dofg1(Char **v, struct command *t) |
| 882 | { |
| 883 | struct process *pp; |
| 884 | |
| 885 | okpcntl(); |
| 886 | pp = pfind(v[0]); |
| 887 | pstart(pp, 1); |
| 888 | pjwait(pp); |
| 889 | } |
| 890 | |
| 891 | /* |
| 892 | * dobg - builtin - put the job into the background |
| 893 | */ |
| 894 | void |
| 895 | /*ARGSUSED*/ |
| 896 | dobg(Char **v, struct command *t) |
| 897 | { |
| 898 | struct process *pp; |
| 899 | |
| 900 | okpcntl(); |
| 901 | ++v; |
| 902 | do { |
| 903 | pp = pfind(*v); |
| 904 | pstart(pp, 0); |
| 905 | } while (*v && *++v); |
| 906 | } |
| 907 | |
| 908 | /* |
| 909 | * %... & - builtin - put the job into the background |
| 910 | */ |
| 911 | void |
| 912 | /*ARGSUSED*/ |
| 913 | dobg1(Char **v, struct command *t) |
| 914 | { |
| 915 | struct process *pp; |
| 916 | |
| 917 | pp = pfind(v[0]); |
| 918 | pstart(pp, 0); |
| 919 | } |
| 920 | |
| 921 | /* |
| 922 | * dostop - builtin - stop the job |
| 923 | */ |
| 924 | void |
| 925 | /*ARGSUSED*/ |
| 926 | dostop(Char **v, struct command *t) |
| 927 | { |
| 928 | pkill(++v, SIGSTOP17); |
| 929 | } |
| 930 | |
| 931 | /* |
| 932 | * dokill - builtin - superset of kill (1) |
| 933 | */ |
| 934 | void |
| 935 | /*ARGSUSED*/ |
| 936 | dokill(Char **v, struct command *t) |
| 937 | { |
| 938 | int signum = SIGTERM15; |
| 939 | const char *errstr; |
| 940 | char *name; |
| 941 | |
| 942 | v++; |
| 943 | if (v[0] && v[0][0] == '-') { |
| 944 | if (v[0][1] == 'l') { |
| 945 | if (v[1]) { |
| 946 | if (!Isdigit(v[1][0])(((v[1][0]) & 0100000U) ? 0 : isdigit((unsigned char) (v[ 1][0])))) |
| 947 | stderror(ERR_NAME0x10000000 | ERR_BADSIG28); |
| 948 | |
| 949 | signum = strtonum(short2str(v[1]), 0, NSIG33-1, &errstr); |
| 950 | if (errstr) |
| 951 | stderror(ERR_NAME0x10000000 | ERR_BADSIG28); |
| 952 | else if (signum == 0) |
| 953 | (void) fputc('0', cshout); /* 0's symbolic name is '0' */ |
| 954 | else |
| 955 | (void) fprintf(cshout, "%s ", sys_signame[signum]); |
| 956 | } else { |
| 957 | for (signum = 1; signum < NSIG33; signum++) { |
| 958 | (void) fprintf(cshout, "%s ", sys_signame[signum]); |
| 959 | if (signum == NSIG33 / 2) |
| 960 | (void) fputc('\n', cshout); |
| 961 | } |
| 962 | } |
| 963 | (void) fputc('\n', cshout); |
| 964 | return; |
| 965 | } |
| 966 | if (Isdigit(v[0][1])(((v[0][1]) & 0100000U) ? 0 : isdigit((unsigned char) (v[ 0][1])))) { |
| 967 | signum = strtonum(short2str(v[0] + 1), 0, NSIG33-1, &errstr); |
| 968 | if (errstr) |
| 969 | stderror(ERR_NAME0x10000000 | ERR_BADSIG28); |
| 970 | } |
| 971 | else { |
| 972 | if (v[0][1] == 's' && (Isspace(v[0][2])(((v[0][2]) & 0100000U) ? 0 : isspace((unsigned char) (v[ 0][2]))) || v[0][2] == '\0')) { |
| 973 | v++; |
| 974 | name = short2str(&v[0][0]); |
| 975 | } else { |
| 976 | name = short2str(&v[0][1]); |
| 977 | } |
| 978 | |
| 979 | if (v[0] == NULL((void *)0) || v[1] == NULL((void *)0)) { |
| 980 | stderror(ERR_NAME0x10000000 | ERR_TOOFEW15); |
| 981 | return; |
| 982 | } |
| 983 | |
| 984 | for (signum = 1; signum < NSIG33; signum++) |
| 985 | if (!strcasecmp(sys_signame[signum], name) || |
| 986 | (strlen(name) > 3 && !strncasecmp("SIG", name, 3) && |
| 987 | !strcasecmp(sys_signame[signum], name + 3))) |
| 988 | break; |
| 989 | |
| 990 | if (signum == NSIG33) { |
| 991 | if (name[0] == '0') |
| 992 | signum = 0; |
| 993 | else { |
| 994 | setname(vis_str(&v[0][0]))(bname = (vis_str(&v[0][0]))); |
| 995 | stderror(ERR_NAME0x10000000 | ERR_UNKSIG29); |
| 996 | } |
| 997 | } |
| 998 | } |
| 999 | v++; |
| 1000 | } |
| 1001 | pkill(v, signum); |
| 1002 | } |
| 1003 | |
| 1004 | static void |
| 1005 | pkill(Char **v, int signum) |
| 1006 | { |
| 1007 | struct process *pp, *np; |
| 1008 | int jobflags = 0; |
| 1009 | int pid, err1 = 0; |
| 1010 | sigset_t sigset; |
| 1011 | Char *cp; |
| 1012 | |
| 1013 | sigemptyset(&sigset); |
| 1014 | sigaddset(&sigset, SIGCHLD20); |
| 1015 | if (setintr) |
| 1016 | sigaddset(&sigset, SIGINT2); |
| 1017 | sigprocmask(SIG_BLOCK1, &sigset, NULL((void *)0)); |
| 1018 | gflag = 0, tglob(v); |
| 1019 | if (gflag) { |
| 1020 | v = globall(v); |
| 1021 | if (v == 0) |
| 1022 | stderror(ERR_NAME0x10000000 | ERR_NOMATCH50); |
| 1023 | } |
| 1024 | else { |
| 1025 | v = gargv = saveblk(v); |
| 1026 | trim(v); |
| 1027 | } |
| 1028 | |
| 1029 | while (v && (cp = *v)) { |
| 1030 | if (*cp == '%') { |
| 1031 | np = pp = pfind(cp); |
| 1032 | do |
| 1033 | jobflags |= np->p_flags; |
| 1034 | while ((np = np->p_friends) != pp); |
| 1035 | switch (signum) { |
| 1036 | |
| 1037 | case SIGSTOP17: |
| 1038 | case SIGTSTP18: |
| 1039 | case SIGTTIN21: |
| 1040 | case SIGTTOU22: |
| 1041 | if ((jobflags & PRUNNING(1<<0)) == 0) { |
| 1042 | (void) fprintf(csherr, "%s: Already suspended\n", |
| 1043 | vis_str(cp)); |
| 1044 | err1++; |
| 1045 | goto cont; |
| 1046 | } |
| 1047 | break; |
| 1048 | /* |
| 1049 | * suspend a process, kill -CONT %, then type jobs; the shell |
| 1050 | * says it is suspended, but it is running; thanks jaap.. |
| 1051 | */ |
| 1052 | case SIGCONT19: |
| 1053 | pstart(pp, 0); |
| 1054 | goto cont; |
| 1055 | } |
| 1056 | if (kill(-pp->p_jobid, signum) == -1) { |
| 1057 | (void) fprintf(csherr, "%s: %s\n", vis_str(cp), |
| 1058 | strerror(errno(*__errno()))); |
| 1059 | err1++; |
| 1060 | } |
| 1061 | if (signum == SIGTERM15 || signum == SIGHUP1) |
| 1062 | (void) kill(-pp->p_jobid, SIGCONT19); |
| 1063 | } |
| 1064 | else if (!(Isdigit(*cp)(((*cp) & 0100000U) ? 0 : isdigit((unsigned char) (*cp))) || *cp == '-')) |
| 1065 | stderror(ERR_NAME0x10000000 | ERR_JOBARGS58); |
| 1066 | else { |
| 1067 | char *ep; |
| 1068 | char *pidnam = short2str(cp); |
| 1069 | |
| 1070 | pid = strtol(pidnam, &ep, 10); |
| 1071 | if (!*pidnam || *ep) { |
| 1072 | (void) fprintf(csherr, "%s: illegal process id\n", pidnam); |
| 1073 | err1++; |
| 1074 | goto cont; |
| 1075 | } |
| 1076 | if (kill((pid_t) pid, signum) == -1) { |
| 1077 | (void) fprintf(csherr, "%d: %s\n", pid, strerror(errno(*__errno()))); |
| 1078 | err1++; |
| 1079 | goto cont; |
| 1080 | } |
| 1081 | if (signum == SIGTERM15 || signum == SIGHUP1) |
| 1082 | (void) kill((pid_t) pid, SIGCONT19); |
| 1083 | } |
| 1084 | cont: |
| 1085 | v++; |
| 1086 | } |
| 1087 | blkfree(gargv); |
| 1088 | gargv = NULL((void *)0); |
| 1089 | sigprocmask(SIG_UNBLOCK2, &sigset, NULL((void *)0)); |
| 1090 | if (err1) |
| 1091 | stderror(ERR_SILENT0x20000000); |
| 1092 | } |
| 1093 | |
| 1094 | /* |
| 1095 | * pstart - start the job in foreground/background |
| 1096 | */ |
| 1097 | void |
| 1098 | pstart(struct process *pp, int foregnd) |
| 1099 | { |
| 1100 | struct process *np; |
| 1101 | sigset_t sigset, osigset; |
| 1102 | long jobflags = 0; |
| 1103 | |
| 1104 | sigemptyset(&sigset); |
| 1105 | sigaddset(&sigset, SIGCHLD20); |
| 1106 | sigprocmask(SIG_BLOCK1, &sigset, &osigset); |
| 1107 | np = pp; |
| 1108 | do { |
| 1109 | jobflags |= np->p_flags; |
| 1110 | if (np->p_flags & (PRUNNING(1<<0) | PSTOPPED(1<<1))) { |
| 1111 | np->p_flags |= PRUNNING(1<<0); |
| 1112 | np->p_flags &= ~PSTOPPED(1<<1); |
| 1113 | if (foregnd) |
| 1114 | np->p_flags |= PFOREGND(1<<8); |
| 1115 | else |
| 1116 | np->p_flags &= ~PFOREGND(1<<8); |
| 1117 | } |
| 1118 | } while ((np = np->p_friends) != pp); |
| 1119 | if (!foregnd) |
| 1120 | pclrcurr(pp); |
| 1121 | (void) pprint(pp, foregnd ? NAME02 | JOBDIR0100 : NUMBER01 | NAME02 | AMPERSAND010); |
| 1122 | if (foregnd) |
| 1123 | (void) tcsetpgrp(FSHTTY15, pp->p_jobid); |
| 1124 | if (jobflags & PSTOPPED(1<<1)) |
| 1125 | (void) kill(-pp->p_jobid, SIGCONT19); |
| 1126 | sigprocmask(SIG_SETMASK3, &osigset, NULL((void *)0)); |
| 1127 | } |
| 1128 | |
| 1129 | void |
| 1130 | panystop(bool neednl) |
| 1131 | { |
| 1132 | struct process *pp; |
| 1133 | |
| 1134 | chkstop = 2; |
| 1135 | for (pp = proclist.p_next; pp; pp = pp->p_next) |
| 1136 | if (pp->p_flags & PSTOPPED(1<<1)) |
| 1137 | stderror(ERR_STOPPED65, neednl ? "\n" : ""); |
| 1138 | } |
| 1139 | |
| 1140 | struct process * |
| 1141 | pfind(Char *cp) |
| 1142 | { |
| 1143 | struct process *pp, *np; |
| 1144 | |
| 1145 | if (cp == 0 || cp[1] == 0 || eq(cp, STRcent2)(Strcmp(cp, STRcent2) == 0) || eq(cp, STRcentplus)(Strcmp(cp, STRcentplus) == 0)) { |
| 1146 | if (pcurrent == NULL((void *)0)) |
| 1147 | stderror(ERR_NAME0x10000000 | ERR_JOBCUR59); |
| 1148 | return (pcurrent); |
| 1149 | } |
| 1150 | if (eq(cp, STRcentminus)(Strcmp(cp, STRcentminus) == 0) || eq(cp, STRcenthash)(Strcmp(cp, STRcenthash) == 0)) { |
| 1151 | if (pprevious == NULL((void *)0)) |
| 1152 | stderror(ERR_NAME0x10000000 | ERR_JOBPREV60); |
| 1153 | return (pprevious); |
| 1154 | } |
| 1155 | if (Isdigit(cp[1])(((cp[1]) & 0100000U) ? 0 : isdigit((unsigned char) (cp[1 ])))) { |
| 1156 | const char *errstr; |
| 1157 | int idx = strtonum(short2str(cp + 1), 1, INT_MAX2147483647, &errstr); |
| 1158 | |
| 1159 | if (errstr) { |
| 1160 | stderror(ERR_NAME0x10000000 | ERR_NOSUCHJOB46); |
| 1161 | return (0); |
| 1162 | } |
| 1163 | for (pp = proclist.p_next; pp; pp = pp->p_next) |
| 1164 | if (pp->p_index == idx && pp->p_pid == pp->p_jobid) |
| 1165 | return (pp); |
| 1166 | stderror(ERR_NAME0x10000000 | ERR_NOSUCHJOB46); |
| 1167 | return (0); |
| 1168 | } |
| 1169 | np = NULL((void *)0); |
| 1170 | for (pp = proclist.p_next; pp; pp = pp->p_next) |
| 1171 | if (pp->p_pid == pp->p_jobid) { |
| 1172 | if (cp[1] == '?') { |
| 1173 | Char *dp; |
| 1174 | |
| 1175 | for (dp = pp->p_command; *dp; dp++) { |
| 1176 | if (*dp != cp[2]) |
| 1177 | continue; |
| 1178 | if (prefix(cp + 2, dp)) |
| 1179 | goto match; |
| 1180 | } |
| 1181 | } |
| 1182 | else if (prefix(cp + 1, pp->p_command)) { |
| 1183 | match: |
| 1184 | if (np) |
| 1185 | stderror(ERR_NAME0x10000000 | ERR_AMBIG40); |
| 1186 | np = pp; |
| 1187 | } |
| 1188 | } |
| 1189 | if (np) |
| 1190 | return (np); |
| 1191 | stderror(ERR_NAME0x10000000 | (cp[1] == '?' ? ERR_JOBPAT61 : ERR_NOSUCHJOB46)); |
| 1192 | /* NOTREACHED */ |
| 1193 | return (0); |
| 1194 | } |
| 1195 | |
| 1196 | |
| 1197 | /* |
| 1198 | * pgetcurr - find most recent job that is not pp, preferably stopped |
| 1199 | */ |
| 1200 | static struct process * |
| 1201 | pgetcurr(struct process *pp) |
| 1202 | { |
| 1203 | struct process *np; |
| 1204 | struct process *xp = NULL((void *)0); |
| 1205 | |
| 1206 | for (np = proclist.p_next; np; np = np->p_next) |
| 1207 | if (np != pcurrent && np != pp && np->p_pid && |
| 1208 | np->p_pid == np->p_jobid) { |
| 1209 | if (np->p_flags & PSTOPPED(1<<1)) |
| 1210 | return (np); |
| 1211 | if (xp == NULL((void *)0)) |
| 1212 | xp = np; |
| 1213 | } |
| 1214 | return (xp); |
| 1215 | } |
| 1216 | |
| 1217 | /* |
| 1218 | * donotify - flag the job so as to report termination asynchronously |
| 1219 | */ |
| 1220 | void |
| 1221 | /*ARGSUSED*/ |
| 1222 | donotify(Char **v, struct command *t) |
| 1223 | { |
| 1224 | struct process *pp; |
| 1225 | |
| 1226 | pp = pfind(*++v); |
| 1227 | pp->p_flags |= PNOTIFY(1<<5); |
| 1228 | } |
| 1229 | |
| 1230 | /* |
| 1231 | * Do the fork and whatever should be done in the child side that |
| 1232 | * should not be done if we are not forking at all (like for simple builtin's) |
| 1233 | * Also do everything that needs any signals fiddled with in the parent side |
| 1234 | * |
| 1235 | * Wanttty tells whether process and/or tty pgrps are to be manipulated: |
| 1236 | * -1: leave tty alone; inherit pgrp from parent |
| 1237 | * 0: already have tty; manipulate process pgrps only |
| 1238 | * 1: want to claim tty; manipulate process and tty pgrps |
| 1239 | * It is usually just the value of tpgrp. |
| 1240 | */ |
| 1241 | |
| 1242 | int |
| 1243 | pfork(struct command *t, int wanttty) |
| 1244 | { |
| 1245 | int pid; |
| 1246 | bool ignint = 0; |
| 1247 | int pgrp; |
| 1248 | sigset_t sigset, osigset; |
| 1249 | |
| 1250 | /* |
| 1251 | * A child will be uninterruptible only under very special conditions. |
| 1252 | * Remember that the semantics of '&' is implemented by disconnecting the |
| 1253 | * process from the tty so signals do not need to ignored just for '&'. |
| 1254 | * Thus signals are set to default action for children unless: we have had |
| 1255 | * an "onintr -" (then specifically ignored) we are not playing with |
| 1256 | * signals (inherit action) |
| 1257 | */ |
| 1258 | if (setintr) |
| 1259 | ignint = (tpgrp == -1 && (t->t_dflg & F_NOINTERRUPT(1<<5))) |
| 1260 | || (gointr && eq(gointr, STRminus)(Strcmp(gointr, STRminus) == 0)); |
| 1261 | /* |
| 1262 | * Check for maximum nesting of 16 processes to avoid Forking loops |
| 1263 | */ |
| 1264 | if (child == 16) |
| 1265 | stderror(ERR_NESTING62, 16); |
| 1266 | /* |
| 1267 | * Hold SIGCHLD until we have the process installed in our table. |
| 1268 | */ |
| 1269 | sigemptyset(&sigset); |
| 1270 | sigaddset(&sigset, SIGCHLD20); |
| 1271 | sigprocmask(SIG_BLOCK1, &sigset, &osigset); |
| 1272 | while ((pid = fork()) == -1) |
| 1273 | if (setintr == 0) |
| 1274 | (void) sleep(FORKSLEEP10); |
| 1275 | else { |
| 1276 | sigprocmask(SIG_SETMASK3, &osigset, NULL((void *)0)); |
| 1277 | stderror(ERR_NOPROC49); |
| 1278 | } |
| 1279 | if (pid == 0) { |
| 1280 | settimes(); |
| 1281 | pgrp = pcurrjob ? pcurrjob->p_jobid : getpid(); |
| 1282 | pflushall(); |
| 1283 | pcurrjob = NULL((void *)0); |
| 1284 | child++; |
| 1285 | if (setintr) { |
| 1286 | setintr = 0; /* until I think otherwise */ |
| 1287 | /* |
| 1288 | * Children just get blown away on SIGINT, SIGQUIT unless "onintr |
| 1289 | * -" seen. |
| 1290 | */ |
| 1291 | (void) signal(SIGINT2, ignint ? SIG_IGN(void (*)(int))1 : SIG_DFL(void (*)(int))0); |
| 1292 | (void) signal(SIGQUIT3, ignint ? SIG_IGN(void (*)(int))1 : SIG_DFL(void (*)(int))0); |
| 1293 | if (wanttty >= 0) { |
| 1294 | /* make stoppable */ |
| 1295 | (void) signal(SIGTSTP18, SIG_DFL(void (*)(int))0); |
| 1296 | (void) signal(SIGTTIN21, SIG_DFL(void (*)(int))0); |
| 1297 | (void) signal(SIGTTOU22, SIG_DFL(void (*)(int))0); |
| 1298 | } |
| 1299 | (void) signal(SIGTERM15, parterm); |
| 1300 | } |
| 1301 | else if (tpgrp == -1 && (t->t_dflg & F_NOINTERRUPT(1<<5))) { |
| 1302 | (void) signal(SIGINT2, SIG_IGN(void (*)(int))1); |
| 1303 | (void) signal(SIGQUIT3, SIG_IGN(void (*)(int))1); |
| 1304 | } |
| 1305 | pgetty(wanttty, pgrp); |
| 1306 | /* |
| 1307 | * Nohup and nice apply only to NODE_COMMAND's but it would be nice |
| 1308 | * (?!?) if you could say "nohup (foo;bar)" Then the parser would have |
| 1309 | * to know about nice/nohup/time |
| 1310 | */ |
| 1311 | if (t->t_dflg & F_NOHUP(1<<12)) |
| 1312 | (void) signal(SIGHUP1, SIG_IGN(void (*)(int))1); |
| 1313 | if (t->t_dflg & F_NICE(1<<11)) |
| 1314 | (void) setpriority(PRIO_PROCESS0, 0, t->t_nice); |
| 1315 | } |
| 1316 | else { |
| 1317 | if (wanttty >= 0) |
| 1318 | (void) setpgid(pid, pcurrjob ? pcurrjob->p_jobid : pid); |
| 1319 | palloc(pid, t); |
| 1320 | sigprocmask(SIG_SETMASK3, &osigset, NULL((void *)0)); |
| 1321 | } |
| 1322 | |
| 1323 | return (pid); |
| 1324 | } |
| 1325 | |
| 1326 | static void |
| 1327 | okpcntl(void) |
| 1328 | { |
| 1329 | if (tpgrp == -1) |
| 1330 | stderror(ERR_JOBCONTROL33); |
| 1331 | if (tpgrp == 0) |
| 1332 | stderror(ERR_JOBCTRLSUB63); |
| 1333 | } |
| 1334 | |
| 1335 | /* |
| 1336 | * if we don't have vfork(), things can still go in the wrong order |
| 1337 | * resulting in the famous 'Stopped (tty output)'. But some systems |
| 1338 | * don't permit the setpgid() call, (these are more recent secure |
| 1339 | * systems such as ibm's aix). Then we'd rather print an error message |
| 1340 | * than hang the shell! |
| 1341 | * I am open to suggestions how to fix that. |
| 1342 | */ |
| 1343 | void |
| 1344 | pgetty(int wanttty, int pgrp) |
| 1345 | { |
| 1346 | sigset_t sigset, osigset; |
| 1347 | |
| 1348 | /* |
| 1349 | * christos: I am blocking the tty signals till I've set things |
| 1350 | * correctly.... |
| 1351 | */ |
| 1352 | if (wanttty > 0) { |
| 1353 | sigemptyset(&sigset); |
| 1354 | sigaddset(&sigset, SIGTSTP18); |
| 1355 | sigaddset(&sigset, SIGTTIN21); |
| 1356 | sigaddset(&sigset, SIGTTOU22); |
| 1357 | sigprocmask(SIG_BLOCK1, &sigset, &osigset); |
| 1358 | } |
| 1359 | /* |
| 1360 | * From: Michael Schroeder <mlschroe@immd4.informatik.uni-erlangen.de> |
| 1361 | * Don't check for tpgrp >= 0 so even non-interactive shells give |
| 1362 | * background jobs process groups Same for the comparison in the other part |
| 1363 | * of the #ifdef |
| 1364 | */ |
| 1365 | if (wanttty >= 0) |
| 1366 | if (setpgid(0, pgrp) == -1) { |
| 1367 | (void) fprintf(csherr, "csh: setpgid error.\n"); |
| 1368 | xexit(0); |
| 1369 | } |
| 1370 | |
| 1371 | if (wanttty > 0) { |
| 1372 | (void) tcsetpgrp(FSHTTY15, pgrp); |
| 1373 | sigprocmask(SIG_SETMASK3, &osigset, NULL((void *)0)); |
| 1374 | } |
| 1375 | |
| 1376 | if (tpgrp > 0) |
| 1377 | tpgrp = 0; /* gave tty away */ |
| 1378 | } |