1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1999 Berkeley Software Design, Inc. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Berkeley Software Design Inc's name may not be used to endorse or 15 * promote products derived from this software without specific prior 16 * written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * From BSDI: daemon.c,v 1.2 1996/08/15 01:11:09 jch Exp 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/param.h> 37 #include <sys/mman.h> 38 #include <sys/wait.h> 39 40 #include <fcntl.h> 41 #include <err.h> 42 #include <errno.h> 43 #include <getopt.h> 44 #include <libutil.h> 45 #include <login_cap.h> 46 #include <paths.h> 47 #include <pwd.h> 48 #include <signal.h> 49 #include <stdio.h> 50 #include <stdbool.h> 51 #include <stdlib.h> 52 #include <unistd.h> 53 #include <string.h> 54 #include <strings.h> 55 #define SYSLOG_NAMES 56 #include <syslog.h> 57 #include <time.h> 58 #include <assert.h> 59 60 #define LBUF_SIZE 4096 61 62 struct daemon_state { 63 int pipe_fd[2]; 64 const char *child_pidfile; 65 const char *parent_pidfile; 66 const char *output_filename; 67 const char *syslog_tag; 68 const char *title; 69 const char *user; 70 struct pidfh *parent_pidfh; 71 struct pidfh *child_pidfh; 72 int keep_cur_workdir; 73 int restart_delay; 74 int stdmask; 75 int syslog_priority; 76 int syslog_facility; 77 int keep_fds_open; 78 int output_fd; 79 bool supervision_enabled; 80 bool child_eof; 81 bool restart_enabled; 82 bool syslog_enabled; 83 bool log_reopen; 84 }; 85 86 static void restrict_process(const char *); 87 static void handle_term(int); 88 static void handle_chld(int); 89 static void handle_hup(int); 90 static int open_log(const char *); 91 static void reopen_log(struct daemon_state *); 92 static bool listen_child(int, struct daemon_state *); 93 static int get_log_mapping(const char *, const CODE *); 94 static void open_pid_files(struct daemon_state *); 95 static void do_output(const unsigned char *, size_t, struct daemon_state *); 96 static void daemon_sleep(time_t, long); 97 static void daemon_state_init(struct daemon_state *); 98 99 static volatile sig_atomic_t terminate = 0; 100 static volatile sig_atomic_t child_gone = 0; 101 static volatile sig_atomic_t pid = 0; 102 static volatile sig_atomic_t do_log_reopen = 0; 103 104 static const char shortopts[] = "+cfHSp:P:ru:o:s:l:t:m:R:T:h"; 105 106 static const struct option longopts[] = { 107 { "change-dir", no_argument, NULL, 'c' }, 108 { "close-fds", no_argument, NULL, 'f' }, 109 { "sighup", no_argument, NULL, 'H' }, 110 { "syslog", no_argument, NULL, 'S' }, 111 { "output-file", required_argument, NULL, 'o' }, 112 { "output-mask", required_argument, NULL, 'm' }, 113 { "child-pidfile", required_argument, NULL, 'p' }, 114 { "supervisor-pidfile", required_argument, NULL, 'P' }, 115 { "restart", no_argument, NULL, 'r' }, 116 { "restart-delay", required_argument, NULL, 'R' }, 117 { "title", required_argument, NULL, 't' }, 118 { "user", required_argument, NULL, 'u' }, 119 { "syslog-priority", required_argument, NULL, 's' }, 120 { "syslog-facility", required_argument, NULL, 'l' }, 121 { "syslog-tag", required_argument, NULL, 'T' }, 122 { "help", no_argument, NULL, 'h' }, 123 { NULL, 0, NULL, 0 } 124 }; 125 126 static _Noreturn void 127 usage(int exitcode) 128 { 129 (void)fprintf(stderr, 130 "usage: daemon [-cfHrS] [-p child_pidfile] [-P supervisor_pidfile]\n" 131 " [-u user] [-o output_file] [-t title]\n" 132 " [-l syslog_facility] [-s syslog_priority]\n" 133 " [-T syslog_tag] [-m output_mask] [-R restart_delay_secs]\n" 134 "command arguments ...\n"); 135 136 (void)fprintf(stderr, 137 " --change-dir -c Change the current working directory to root\n" 138 " --close-fds -f Set stdin, stdout, stderr to /dev/null\n" 139 " --sighup -H Close and re-open output file on SIGHUP\n" 140 " --syslog -S Send output to syslog\n" 141 " --output-file -o <file> Append output of the child process to file\n" 142 " --output-mask -m <mask> What to send to syslog/file\n" 143 " 1=stdout, 2=stderr, 3=both\n" 144 " --child-pidfile -p <file> Write PID of the child process to file\n" 145 " --supervisor-pidfile -P <file> Write PID of the supervisor process to file\n" 146 " --restart -r Restart child if it terminates (1 sec delay)\n" 147 " --restart-delay -R <N> Restart child if it terminates after N sec\n" 148 " --title -t <title> Set the title of the supervisor process\n" 149 " --user -u <user> Drop privileges, run as given user\n" 150 " --syslog-priority -s <prio> Set syslog priority\n" 151 " --syslog-facility -l <flty> Set syslog facility\n" 152 " --syslog-tag -T <tag> Set syslog tag\n" 153 " --help -h Show this help\n"); 154 155 exit(exitcode); 156 } 157 158 int 159 main(int argc, char *argv[]) 160 { 161 char *p = NULL; 162 int ch = 0; 163 struct daemon_state state; 164 sigset_t mask_orig; 165 sigset_t mask_read; 166 sigset_t mask_term; 167 sigset_t mask_susp; 168 169 daemon_state_init(&state); 170 sigemptyset(&mask_susp); 171 sigemptyset(&mask_read); 172 sigemptyset(&mask_term); 173 sigemptyset(&mask_orig); 174 175 /* 176 * Supervision mode is enabled if one of the following options are used: 177 * --child-pidfile -p 178 * --supervisor-pidfile -P 179 * --restart -r / --restart-delay -R 180 * --syslog -S 181 * --syslog-facility -l 182 * --syslog-priority -s 183 * --syslog-tag -T 184 * 185 * In supervision mode daemon executes the command in a forked process 186 * and observes the child by waiting for SIGCHILD. In supervision mode 187 * daemon must never exit before the child, this is necessary to prevent 188 * orphaning the child and leaving a stale pid file. 189 * To achieve this daemon catches SIGTERM and 190 * forwards it to the child, expecting to get SIGCHLD eventually. 191 */ 192 while ((ch = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) { 193 switch (ch) { 194 case 'c': 195 state.keep_cur_workdir = 0; 196 break; 197 case 'f': 198 state.keep_fds_open = 0; 199 break; 200 case 'H': 201 state.log_reopen = true; 202 break; 203 case 'l': 204 state.syslog_facility = get_log_mapping(optarg, 205 facilitynames); 206 if (state.syslog_facility == -1) { 207 errx(5, "unrecognized syslog facility"); 208 } 209 state.syslog_enabled = true; 210 state.supervision_enabled = true; 211 break; 212 case 'm': 213 state.stdmask = strtol(optarg, &p, 10); 214 if (p == optarg || state.stdmask < 0 || state.stdmask > 3) { 215 errx(6, "unrecognized listening mask"); 216 } 217 break; 218 case 'o': 219 state.output_filename = optarg; 220 /* 221 * TODO: setting output filename doesn't have to turn 222 * the supervision mode on. For non-supervised mode 223 * daemon could open the specified file and set it's 224 * descriptor as both stderr and stout before execve() 225 */ 226 state.supervision_enabled = true; 227 break; 228 case 'p': 229 state.child_pidfile = optarg; 230 state.supervision_enabled = true; 231 break; 232 case 'P': 233 state.parent_pidfile = optarg; 234 state.supervision_enabled = true; 235 break; 236 case 'r': 237 state.restart_enabled = true; 238 state.supervision_enabled = true; 239 break; 240 case 'R': 241 state.restart_enabled = true; 242 state.restart_delay = strtol(optarg, &p, 0); 243 if (p == optarg || state.restart_delay < 1) { 244 errx(6, "invalid restart delay"); 245 } 246 break; 247 case 's': 248 state.syslog_priority = get_log_mapping(optarg, 249 prioritynames); 250 if (state.syslog_priority == -1) { 251 errx(4, "unrecognized syslog priority"); 252 } 253 state.syslog_enabled = true; 254 state.supervision_enabled = true; 255 break; 256 case 'S': 257 state.syslog_enabled = true; 258 state.supervision_enabled = true; 259 break; 260 case 't': 261 state.title = optarg; 262 break; 263 case 'T': 264 state.syslog_tag = optarg; 265 state.syslog_enabled = true; 266 state.supervision_enabled = true; 267 break; 268 case 'u': 269 state.user = optarg; 270 break; 271 case 'h': 272 usage(0); 273 __builtin_unreachable(); 274 default: 275 usage(1); 276 } 277 } 278 argc -= optind; 279 argv += optind; 280 281 if (argc == 0) { 282 usage(1); 283 } 284 285 if (!state.title) { 286 state.title = argv[0]; 287 } 288 289 if (state.output_filename) { 290 state.output_fd = open_log(state.output_filename); 291 if (state.output_fd == -1) { 292 err(7, "open"); 293 } 294 } 295 296 if (state.syslog_enabled) { 297 openlog(state.syslog_tag, LOG_PID | LOG_NDELAY, 298 state.syslog_facility); 299 } 300 301 /* 302 * Try to open the pidfile before calling daemon(3), 303 * to be able to report the error intelligently 304 */ 305 open_pid_files(&state); 306 if (daemon(state.keep_cur_workdir, state.keep_fds_open) == -1) { 307 warn("daemon"); 308 goto exit; 309 } 310 /* Write out parent pidfile if needed. */ 311 pidfile_write(state.parent_pidfh); 312 313 if (state.supervision_enabled) { 314 struct sigaction act_term = { 0 }; 315 struct sigaction act_chld = { 0 }; 316 struct sigaction act_hup = { 0 }; 317 318 /* Avoid PID racing with SIGCHLD and SIGTERM. */ 319 act_term.sa_handler = handle_term; 320 sigemptyset(&act_term.sa_mask); 321 sigaddset(&act_term.sa_mask, SIGCHLD); 322 323 act_chld.sa_handler = handle_chld; 324 sigemptyset(&act_chld.sa_mask); 325 sigaddset(&act_chld.sa_mask, SIGTERM); 326 327 act_hup.sa_handler = handle_hup; 328 sigemptyset(&act_hup.sa_mask); 329 330 /* Block these when avoiding racing before sigsuspend(). */ 331 sigaddset(&mask_susp, SIGTERM); 332 sigaddset(&mask_susp, SIGCHLD); 333 /* Block SIGTERM when we lack a valid child PID. */ 334 sigaddset(&mask_term, SIGTERM); 335 /* 336 * When reading, we wish to avoid SIGCHLD. SIGTERM 337 * has to be caught, otherwise we'll be stuck until 338 * the read() returns - if it returns. 339 */ 340 sigaddset(&mask_read, SIGCHLD); 341 /* Block SIGTERM to avoid racing until we have forked. */ 342 if (sigprocmask(SIG_BLOCK, &mask_term, &mask_orig)) { 343 warn("sigprocmask"); 344 goto exit; 345 } 346 if (sigaction(SIGTERM, &act_term, NULL) == -1) { 347 warn("sigaction"); 348 goto exit; 349 } 350 if (sigaction(SIGCHLD, &act_chld, NULL) == -1) { 351 warn("sigaction"); 352 goto exit; 353 } 354 /* 355 * Try to protect against pageout kill. Ignore the 356 * error, madvise(2) will fail only if a process does 357 * not have superuser privileges. 358 */ 359 (void)madvise(NULL, 0, MADV_PROTECT); 360 if (state.log_reopen && state.output_fd >= 0 && 361 sigaction(SIGHUP, &act_hup, NULL) == -1) { 362 warn("sigaction"); 363 goto exit; 364 } 365 restart: 366 if (pipe(state.pipe_fd)) { 367 err(1, "pipe"); 368 } 369 /* 370 * Spawn a child to exec the command. 371 */ 372 child_gone = 0; 373 pid = fork(); 374 } 375 376 /* fork failed, this can only happen when supervision is enabled */ 377 if (pid == -1) { 378 warn("fork"); 379 goto exit; 380 } 381 382 383 /* fork succeeded, this is child's branch or supervision is disabled */ 384 if (pid == 0) { 385 pidfile_write(state.child_pidfh); 386 387 if (state.user != NULL) { 388 restrict_process(state.user); 389 } 390 /* 391 * In supervision mode, the child gets the original sigmask, 392 * and dup'd pipes. 393 */ 394 if (state.supervision_enabled) { 395 close(state.pipe_fd[0]); 396 if (sigprocmask(SIG_SETMASK, &mask_orig, NULL)) { 397 err(1, "sigprogmask"); 398 } 399 if (state.stdmask & STDERR_FILENO) { 400 if (dup2(state.pipe_fd[1], STDERR_FILENO) == -1) { 401 err(1, "dup2"); 402 } 403 } 404 if (state.stdmask & STDOUT_FILENO) { 405 if (dup2(state.pipe_fd[1], STDOUT_FILENO) == -1) { 406 err(1, "dup2"); 407 } 408 } 409 if (state.pipe_fd[1] != STDERR_FILENO && 410 state.pipe_fd[1] != STDOUT_FILENO) { 411 close(state.pipe_fd[1]); 412 } 413 } 414 execvp(argv[0], argv); 415 /* execvp() failed - report error and exit this process */ 416 err(1, "%s", argv[0]); 417 } 418 419 /* 420 * else: pid > 0 421 * fork succeeded, this is the parent branch, this can only happen when 422 * supervision is enabled 423 * 424 * Unblock SIGTERM after we know we have a valid child PID to signal. 425 */ 426 if (sigprocmask(SIG_UNBLOCK, &mask_term, NULL)) { 427 warn("sigprocmask"); 428 goto exit; 429 } 430 close(state.pipe_fd[1]); 431 state.pipe_fd[1] = -1; 432 433 setproctitle("%s[%d]", state.title, (int)pid); 434 /* 435 * As we have closed the write end of pipe for parent process, 436 * we might detect the child's exit by reading EOF. The child 437 * might have closed its stdout and stderr, so we must wait for 438 * the SIGCHLD to ensure that the process is actually gone. 439 */ 440 for (;;) { 441 /* 442 * We block SIGCHLD when listening, but SIGTERM we accept 443 * so the read() won't block if we wish to depart. 444 * 445 * Upon receiving SIGTERM, we have several options after 446 * sending the SIGTERM to our child: 447 * - read until EOF 448 * - read until EOF but only for a while 449 * - bail immediately 450 * 451 * We go for the third, as otherwise we have no guarantee 452 * that we won't block indefinitely if the child refuses 453 * to depart. To handle the second option, a different 454 * approach would be needed (procctl()?) 455 */ 456 if (child_gone && state.child_eof) { 457 break; 458 } 459 460 if (terminate) { 461 goto exit; 462 } 463 464 if (state.child_eof) { 465 if (sigprocmask(SIG_BLOCK, &mask_susp, NULL)) { 466 warn("sigprocmask"); 467 goto exit; 468 } 469 while (!terminate && !child_gone) { 470 sigsuspend(&mask_orig); 471 } 472 if (sigprocmask(SIG_UNBLOCK, &mask_susp, NULL)) { 473 warn("sigprocmask"); 474 goto exit; 475 } 476 continue; 477 } 478 479 if (sigprocmask(SIG_BLOCK, &mask_read, NULL)) { 480 warn("sigprocmask"); 481 goto exit; 482 } 483 484 state.child_eof = !listen_child(state.pipe_fd[0], &state); 485 486 if (sigprocmask(SIG_UNBLOCK, &mask_read, NULL)) { 487 warn("sigprocmask"); 488 goto exit; 489 } 490 491 } 492 if (state.restart_enabled && !terminate) { 493 daemon_sleep(state.restart_delay, 0); 494 } 495 if (sigprocmask(SIG_BLOCK, &mask_term, NULL)) { 496 warn("sigprocmask"); 497 goto exit; 498 } 499 if (state.restart_enabled && !terminate) { 500 close(state.pipe_fd[0]); 501 state.pipe_fd[0] = -1; 502 goto restart; 503 } 504 exit: 505 close(state.output_fd); 506 close(state.pipe_fd[0]); 507 close(state.pipe_fd[1]); 508 if (state.syslog_enabled) { 509 closelog(); 510 } 511 pidfile_remove(state.child_pidfh); 512 pidfile_remove(state.parent_pidfh); 513 exit(1); /* If daemon(3) succeeded exit status does not matter. */ 514 } 515 516 static void 517 daemon_sleep(time_t secs, long nsecs) 518 { 519 struct timespec ts = { secs, nsecs }; 520 521 while (!terminate && nanosleep(&ts, &ts) == -1) { 522 if (errno != EINTR) { 523 err(1, "nanosleep"); 524 } 525 } 526 } 527 528 static void 529 open_pid_files(struct daemon_state *state) 530 { 531 pid_t fpid; 532 int serrno; 533 534 if (state->child_pidfile) { 535 state->child_pidfh = pidfile_open(state->child_pidfile, 0600, &fpid); 536 if (state->child_pidfh == NULL) { 537 if (errno == EEXIST) { 538 errx(3, "process already running, pid: %d", 539 fpid); 540 } 541 err(2, "pidfile ``%s''", state->child_pidfile); 542 } 543 } 544 /* Do the same for the actual daemon process. */ 545 if (state->parent_pidfile) { 546 state->parent_pidfh= pidfile_open(state->parent_pidfile, 0600, &fpid); 547 if (state->parent_pidfh == NULL) { 548 serrno = errno; 549 pidfile_remove(state->child_pidfh); 550 errno = serrno; 551 if (errno == EEXIST) { 552 errx(3, "process already running, pid: %d", 553 fpid); 554 } 555 err(2, "ppidfile ``%s''", state->parent_pidfile); 556 } 557 } 558 } 559 560 static int 561 get_log_mapping(const char *str, const CODE *c) 562 { 563 const CODE *cp; 564 for (cp = c; cp->c_name; cp++) 565 if (strcmp(cp->c_name, str) == 0) { 566 return cp->c_val; 567 } 568 return -1; 569 } 570 571 static void 572 restrict_process(const char *user) 573 { 574 struct passwd *pw = NULL; 575 576 pw = getpwnam(user); 577 if (pw == NULL) { 578 errx(1, "unknown user: %s", user); 579 } 580 581 if (setusercontext(NULL, pw, pw->pw_uid, LOGIN_SETALL) != 0) { 582 errx(1, "failed to set user environment"); 583 } 584 585 setenv("USER", pw->pw_name, 1); 586 setenv("HOME", pw->pw_dir, 1); 587 setenv("SHELL", *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL, 1); 588 } 589 590 /* 591 * We try to collect whole lines terminated by '\n'. Otherwise we collect a 592 * full buffer, and then output it. 593 * 594 * Return value of false is assumed to mean EOF or error, and true indicates to 595 * continue reading. 596 */ 597 static bool 598 listen_child(int fd, struct daemon_state *state) 599 { 600 static unsigned char buf[LBUF_SIZE]; 601 static size_t bytes_read = 0; 602 int rv; 603 604 assert(state); 605 assert(bytes_read < LBUF_SIZE - 1); 606 607 if (do_log_reopen) { 608 reopen_log(state); 609 } 610 rv = read(fd, buf + bytes_read, LBUF_SIZE - bytes_read - 1); 611 if (rv > 0) { 612 unsigned char *cp; 613 614 bytes_read += rv; 615 assert(bytes_read <= LBUF_SIZE - 1); 616 /* Always NUL-terminate just in case. */ 617 buf[LBUF_SIZE - 1] = '\0'; 618 /* 619 * Chomp line by line until we run out of buffer. 620 * This does not take NUL characters into account. 621 */ 622 while ((cp = memchr(buf, '\n', bytes_read)) != NULL) { 623 size_t bytes_line = cp - buf + 1; 624 assert(bytes_line <= bytes_read); 625 do_output(buf, bytes_line, state); 626 bytes_read -= bytes_line; 627 memmove(buf, cp + 1, bytes_read); 628 } 629 /* Wait until the buffer is full. */ 630 if (bytes_read < LBUF_SIZE - 1) { 631 return true; 632 } 633 do_output(buf, bytes_read, state); 634 bytes_read = 0; 635 return true; 636 } else if (rv == -1) { 637 /* EINTR should trigger another read. */ 638 if (errno == EINTR) { 639 return true; 640 } else { 641 warn("read"); 642 return false; 643 } 644 } 645 /* Upon EOF, we have to flush what's left of the buffer. */ 646 if (bytes_read > 0) { 647 do_output(buf, bytes_read, state); 648 bytes_read = 0; 649 } 650 return false; 651 } 652 653 /* 654 * The default behavior is to stay silent if the user wants to redirect 655 * output to a file and/or syslog. If neither are provided, then we bounce 656 * everything back to parent's stdout. 657 */ 658 static void 659 do_output(const unsigned char *buf, size_t len, struct daemon_state *state) 660 { 661 assert(len <= LBUF_SIZE); 662 assert(state); 663 664 if (len < 1) { 665 return; 666 } 667 if (state->syslog_enabled) { 668 syslog(state->syslog_priority, "%.*s", (int)len, buf); 669 } 670 if (state->output_fd != -1) { 671 if (write(state->output_fd, buf, len) == -1) 672 warn("write"); 673 } 674 if (state->keep_fds_open && 675 !state->syslog_enabled && 676 state->output_fd == -1) { 677 printf("%.*s", (int)len, buf); 678 } 679 } 680 681 /* 682 * We use the global PID acquired directly from fork. If there is no valid 683 * child pid, the handler should be blocked and/or child_gone == 1. 684 */ 685 static void 686 handle_term(int signo) 687 { 688 if (pid > 0 && !child_gone) { 689 kill(pid, signo); 690 } 691 terminate = 1; 692 } 693 694 static void 695 handle_chld(int signo __unused) 696 { 697 698 for (;;) { 699 int rv = waitpid(-1, NULL, WNOHANG); 700 if (pid == rv) { 701 child_gone = 1; 702 break; 703 } else if (rv == -1 && errno != EINTR) { 704 warn("waitpid"); 705 return; 706 } 707 } 708 } 709 710 static void 711 handle_hup(int signo __unused) 712 { 713 714 do_log_reopen = 1; 715 } 716 717 static int 718 open_log(const char *outfn) 719 { 720 721 return open(outfn, O_CREAT | O_WRONLY | O_APPEND | O_CLOEXEC, 0600); 722 } 723 724 static void 725 reopen_log(struct daemon_state *state) 726 { 727 int outfd; 728 729 do_log_reopen = 0; 730 outfd = open_log(state->output_filename); 731 if (state->output_fd >= 0) { 732 close(state->output_fd); 733 } 734 state->output_fd = outfd; 735 } 736 737 static void 738 daemon_state_init(struct daemon_state *state) 739 { 740 memset(state, 0, sizeof(struct daemon_state)); 741 *state = (struct daemon_state) { 742 .pipe_fd = { -1, -1 }, 743 .parent_pidfh = NULL, 744 .child_pidfh = NULL, 745 .child_pidfile = NULL, 746 .parent_pidfile = NULL, 747 .title = NULL, 748 .user = NULL, 749 .supervision_enabled = false, 750 .child_eof = false, 751 .restart_enabled = false, 752 .keep_cur_workdir = 1, 753 .restart_delay = 1, 754 .stdmask = STDOUT_FILENO | STDERR_FILENO, 755 .syslog_enabled = false, 756 .log_reopen = false, 757 .syslog_priority = LOG_NOTICE, 758 .syslog_tag = "daemon", 759 .syslog_facility = LOG_DAEMON, 760 .keep_fds_open = 1, 761 .output_fd = -1, 762 .output_filename = NULL, 763 }; 764 } 765