1 /* vi: set sw=4 ts=4: */
3 * Mini init implementation for busybox
6 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
7 * Adjusted by so many folks, it's impossible to keep track.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 /* Turn this on to disable all the dangerous
26 rebooting stuff when debugging.
40 #include <sys/fcntl.h>
41 #include <sys/ioctl.h>
42 #include <sys/mount.h>
43 #include <sys/types.h>
47 # include <sys/syslog.h>
51 /* From <linux/vt.h> */
53 unsigned short v_active; /* active vt */
54 unsigned short v_signal; /* signal to send */
55 unsigned short v_state; /* vt bitmask */
57 static const int VT_GETSTATE = 0x5603; /* get global vt state info */
59 /* From <linux/serial.h> */
60 struct serial_struct {
69 unsigned short close_delay;
70 char reserved_char[2];
72 unsigned short closing_wait; /* time to wait before closing */
73 unsigned short closing_wait2; /* no longer used... */
79 #ifndef RB_HALT_SYSTEM
80 static const int RB_HALT_SYSTEM = 0xcdef0123;
81 static const int RB_ENABLE_CAD = 0x89abcdef;
82 static const int RB_DISABLE_CAD = 0;
83 #define RB_POWER_OFF 0x4321fedc
84 static const int RB_AUTOBOOT = 0x01234567;
87 #if __GNU_LIBRARY__ > 5
88 #include <sys/reboot.h>
89 #define init_reboot(magic) reboot(magic)
91 #define init_reboot(magic) reboot(0xfee1dead, 672274793, magic)
95 #define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
99 #if defined BB_FEATURE_INIT_COREDUMPS
101 * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called
102 * before processes are spawned to set core file size as unlimited.
103 * This is for debugging only. Don't use this is production, unless
104 * you want core dumps lying about....
106 #define CORE_ENABLE_FLAG_FILE "/.init_enable_core"
107 #include <sys/resource.h>
108 #include <sys/time.h>
111 #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
113 #if __GNU_LIBRARY__ > 5
114 #include <sys/kdaemon.h>
116 extern int bdflush (int func, long int data);
120 #define VT_PRIMARY "/dev/tty1" /* Primary virtual console */
121 #define VT_SECONDARY "/dev/tty2" /* Virtual console */
122 #define VT_THIRD "/dev/tty3" /* Virtual console */
123 #define VT_FOURTH "/dev/tty4" /* Virtual console */
124 #define VT_LOG "/dev/tty5" /* Virtual console */
125 #define SERIAL_CON0 "/dev/ttyS0" /* Primary serial console */
126 #define SERIAL_CON1 "/dev/ttyS1" /* Serial console */
127 #define SHELL "-/bin/sh" /* Default shell */
128 #define INITTAB "/etc/inittab" /* inittab file location */
130 #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */
133 #define MAXENV 16 /* Number of env. vars */
134 //static const int MAXENV = 16; /* Number of env. vars */
135 static const int LOG = 0x1;
136 static const int CONSOLE = 0x2;
138 /* Allowed init action types */
149 /* A mapping between "inittab" action name strings and action type codes. */
150 typedef struct initActionType {
152 initActionEnum action;
155 static const struct initActionType actions[] = {
156 {"sysinit", SYSINIT},
157 {"respawn", RESPAWN},
158 {"askfirst", ASKFIRST},
161 {"ctrlaltdel", CTRLALTDEL},
162 {"shutdown", SHUTDOWN},
166 /* Set up a linked list of initActions, to be read from inittab */
167 typedef struct initActionTag initAction;
168 struct initActionTag {
173 initActionEnum action;
175 static initAction *initActionList = NULL;
178 static char *secondConsole = VT_SECONDARY;
179 static char *thirdConsole = VT_THIRD;
180 static char *fourthConsole = VT_FOURTH;
181 static char *log = VT_LOG;
182 static int kernelVersion = 0;
183 static char termType[32] = "TERM=linux";
184 static char console[32] = _PATH_CONSOLE;
186 static void delete_initAction(initAction * action);
190 /* Print a message to the specified device.
191 * Device may be bitwise-or'd from LOG | CONSOLE */
192 static void message(int device, char *fmt, ...)
193 __attribute__ ((format (printf, 2, 3)));
194 static void message(int device, char *fmt, ...)
201 /* Log the message to syslogd */
205 va_start(arguments, fmt);
206 vsnprintf(msg, sizeof(msg), fmt, arguments);
208 openlog(applet_name, 0, LOG_USER);
209 syslog(LOG_USER|LOG_INFO, msg);
213 static int log_fd = -1;
215 /* Take full control of the log tty, and never close it.
216 * It's mine, all mine! Muhahahaha! */
219 /* don't even try to log, because there is no such console */
221 /* log to main console instead */
223 } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) {
225 fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log);
230 if ((device & LOG) && (log_fd >= 0)) {
231 va_start(arguments, fmt);
232 vdprintf(log_fd, fmt, arguments);
237 if (device & CONSOLE) {
238 /* Always send console messages to /dev/console so people will see them. */
241 device_open(_PATH_CONSOLE,
242 O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
243 va_start(arguments, fmt);
244 vdprintf(fd, fmt, arguments);
248 fprintf(stderr, "Bummer, can't print: ");
249 va_start(arguments, fmt);
250 vfprintf(stderr, fmt, arguments);
256 /* Set terminal settings to reasonable defaults */
257 static void set_term(int fd)
263 /* set control chars */
264 tty.c_cc[VINTR] = 3; /* C-c */
265 tty.c_cc[VQUIT] = 28; /* C-\ */
266 tty.c_cc[VERASE] = 127; /* C-? */
267 tty.c_cc[VKILL] = 21; /* C-u */
268 tty.c_cc[VEOF] = 4; /* C-d */
269 tty.c_cc[VSTART] = 17; /* C-q */
270 tty.c_cc[VSTOP] = 19; /* C-s */
271 tty.c_cc[VSUSP] = 26; /* C-z */
273 /* use line dicipline 0 */
276 /* Make it be sane */
277 tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
278 tty.c_cflag |= CREAD|HUPCL|CLOCAL;
282 tty.c_iflag = ICRNL | IXON | IXOFF;
285 tty.c_oflag = OPOST | ONLCR;
289 ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN;
291 tcsetattr(fd, TCSANOW, &tty);
294 /* How much memory does this machine have?
295 Units are kBytes to avoid overflow on 4GB machines */
296 static int check_free_memory()
299 unsigned int result, u, s=10;
301 if (sysinfo(&info) != 0) {
302 perror_msg("Error checking free memory");
306 /* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes.
307 * Kernels 2.4.0 return info.mem_unit in bytes. */
310 while ( (u&1) == 0 && s > 0 ) { u>>=1; s--; }
311 result = (info.totalram>>s) + (info.totalswap>>s);
313 if (result < 0) result = INT_MAX;
317 static void console_init()
320 int tried_devcons = 0;
321 int tried_vtprimary = 0;
323 struct serial_struct sr;
326 if ((s = getenv("TERM")) != NULL) {
327 snprintf(termType, sizeof(termType) - 1, "TERM=%s", s);
330 if ((s = getenv("CONSOLE")) != NULL) {
331 safe_strncpy(console, s, sizeof(console));
334 /* sparc kernel supports console=tty[ab] parameter which is also
335 * passed to init, so catch it here */
336 else if ((s = getenv("console")) != NULL) {
337 /* remap tty[ab] to /dev/ttyS[01] */
338 if (strcmp(s, "ttya") == 0)
339 safe_strncpy(console, SERIAL_CON0, sizeof(console));
340 else if (strcmp(s, "ttyb") == 0)
341 safe_strncpy(console, SERIAL_CON1, sizeof(console));
345 /* 2.2 kernels: identify the real console backend and try to use it */
346 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
347 /* this is a serial console */
348 snprintf(console, sizeof(console) - 1, "/dev/ttyS%d", sr.line);
349 } else if (ioctl(0, VT_GETSTATE, &vt) == 0) {
350 /* this is linux virtual tty */
351 snprintf(console, sizeof(console) - 1, "/dev/tty%d",
354 safe_strncpy(console, _PATH_CONSOLE, sizeof(console));
359 while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
360 /* Can't open selected console -- try /dev/console */
361 if (!tried_devcons) {
363 safe_strncpy(console, _PATH_CONSOLE, sizeof(console));
366 /* Can't open selected console -- try vt1 */
367 if (!tried_vtprimary) {
369 safe_strncpy(console, VT_PRIMARY, sizeof(console));
375 /* Perhaps we should panic here? */
376 safe_strncpy(console, "/dev/null", sizeof(console));
378 /* check for serial console and disable logging to tty5 & running a
380 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
382 secondConsole = NULL;
384 fourthConsole = NULL;
385 /* Force the TERM setting to vt102 for serial console --
386 * iff TERM is set to linux (the default) */
387 if (strcmp( termType, "TERM=linux" ) == 0)
388 safe_strncpy(termType, "TERM=vt102", sizeof(termType));
389 message(LOG | CONSOLE,
390 "serial console detected. Disabling virtual terminals.\r\n");
394 message(LOG, "console=%s\n", console);
397 static void fixup_argv(int argc, char **argv, char *new_argv0)
400 /* Fix up argv[0] to be certain we claim to be init */
401 len = strlen(argv[0]);
402 memset(argv[0], 0, len);
403 strncpy(argv[0], new_argv0, len);
405 /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */
408 memset(argv[len], 0, strlen(argv[len]));
414 static pid_t run(char *command, char *terminal, int get_enter)
420 char *cmd[255], *cmdpath;
423 static const char press_enter[] =
425 #ifdef CUSTOMIZED_BANNER
426 #include CUSTOMIZED_BANNER
429 "\nPlease press Enter to activate this console. ";
430 char *environment[MAXENV+1] = {
433 "PATH=/usr/bin:/bin:/usr/sbin:/sbin",
439 /* inherit environment to the child, merging our values -andy */
440 for (i=0; environ[i]; i++) {
441 for (j=0; environment[j]; j++) {
442 s = strchr(environment[j], '=');
443 if (!strncmp(environ[i], environment[j], s - environment[j]))
446 if (!environment[j]) {
447 environment[j++] = environ[i];
448 environment[j] = NULL;
452 if ((pid = fork()) == 0) {
454 ioctl(0, TIOCNOTTY, 0);
460 /* Reset signal handlers set for parent process */
461 signal(SIGUSR1, SIG_DFL);
462 signal(SIGUSR2, SIG_DFL);
463 signal(SIGINT, SIG_DFL);
464 signal(SIGTERM, SIG_DFL);
465 signal(SIGHUP, SIG_DFL);
467 if ((fd = device_open(terminal, O_RDWR)) < 0) {
468 if (stat(terminal, &sb) != 0) {
469 message(LOG | CONSOLE, "device '%s' does not exist.\n",
473 message(LOG | CONSOLE, "Bummer, can't open %s\r\n", terminal);
479 ioctl(0, TIOCSCTTY, 1);
480 tcsetpgrp(0, getpgrp());
483 /* See if any special /bin/sh requiring characters are present */
484 if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
487 strcpy(buf, "exec ");
488 strncat(buf, command, sizeof(buf) - strlen(buf) - 1);
492 /* Convert command (char*) into cmd (char**, one word per string) */
493 for (tmpCmd = command, i = 0;
494 (tmpCmd = strsep(&command, " \t")) != NULL;) {
495 if (*tmpCmd != '\0') {
507 Interactive shells want to see a dash in argv[0]. This
508 typically is handled by login, argv will be setup this
509 way if a dash appears at the front of the command path
513 if (*cmdpath == '-') {
515 /* skip over the dash */
518 /* find the last component in the command pathname */
519 s = get_last_path_component(cmdpath);
521 /* make a new argv[0] */
522 if ((cmd[0] = malloc(strlen(s)+2)) == NULL) {
523 message(LOG | CONSOLE, "malloc failed");
531 if (get_enter == TRUE) {
533 * Save memory by not exec-ing anything large (like a shell)
534 * before the user wants it. This is critical if swap is not
535 * enabled and the system has low memory. Generally this will
536 * be run on the second virtual console, and the first will
537 * be allowed to start a shell or whatever an init script
541 message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
542 cmd[0], getpid(), terminal);
544 write(fileno(stdout), press_enter, sizeof(press_enter) - 1);
549 /* Log the process name and args */
550 message(LOG, "Starting pid %d, console %s: '%s'\r\n",
551 getpid(), terminal, command);
554 #if defined BB_FEATURE_INIT_COREDUMPS
555 if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) {
557 limit.rlim_cur = RLIM_INFINITY;
558 limit.rlim_max = RLIM_INFINITY;
559 setrlimit(RLIMIT_CORE, &limit);
563 /* Now run it. The new program will take over this PID,
564 * so nothing further in init.c should be run. */
565 execve(cmdpath, cmd, environment);
567 /* We're still here? Some error happened. */
568 message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath,
575 static int waitfor(char *command, char *terminal, int get_enter)
578 int pid = run(command, terminal, get_enter);
581 wpid = wait(&status);
582 if (wpid > 0 && wpid != pid) {
591 /* Make sure there is enough memory to do something useful. *
592 * Calls "swapon -a" if needed so be sure /etc/fstab is present... */
593 static void check_memory()
597 if (check_free_memory() > 1000)
600 if (stat("/etc/fstab", &statBuf) == 0) {
601 /* swapon -a requires /proc typically */
602 waitfor("mount proc /proc -t proc", console, FALSE);
603 /* Try to turn on swap */
604 waitfor("swapon -a", console, FALSE);
605 if (check_free_memory() < 1000)
613 "Sorry, your computer does not have enough memory.\r\n");
618 /* Run all commands to be run right before halt/reboot */
619 static void run_actions(initActionEnum action)
622 for (a = initActionList; a; a = tmp) {
624 if (a->action == action) {
625 waitfor(a->process, a->console, FALSE);
626 delete_initAction(a);
633 static void shutdown_system(void)
636 /* first disable our SIGHUP signal */
637 signal(SIGHUP, SIG_DFL);
639 /* Allow Ctrl-Alt-Del to reboot system. */
640 init_reboot(RB_ENABLE_CAD);
642 message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n");
645 /* Send signals to every process _except_ pid 1 */
646 message(CONSOLE|LOG, "Sending SIGTERM to all processes.\r\n");
651 message(CONSOLE|LOG, "Sending SIGKILL to all processes.\r\n");
655 /* run everything to be run at "shutdown" */
656 run_actions(SHUTDOWN);
659 if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) {
660 /* bdflush, kupdate not needed for kernels >2.2.11 */
666 static void halt_signal(int sig)
670 "The system is halted. Press %s or turn off power\r\n",
671 (secondConsole == NULL) /* serial console */
672 ? "Reset" : "CTRL-ALT-DEL");
675 /* allow time for last message to reach serial console */
678 if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0))
679 init_reboot(RB_POWER_OFF);
681 init_reboot(RB_HALT_SYSTEM);
685 static void reboot_signal(int sig)
688 message(CONSOLE|LOG, "Please stand by while rebooting the system.\r\n");
691 /* allow time for last message to reach serial console */
694 init_reboot(RB_AUTOBOOT);
698 static void ctrlaltdel_signal(int sig)
700 run_actions(CTRLALTDEL);
703 #endif /* ! DEBUG_INIT */
705 static void new_initAction(initActionEnum action, char *process, char *cons)
707 initAction *newAction;
712 /* If BusyBox detects that a serial console is in use,
713 * then entries not refering to the console or null devices will _not_ be run.
714 * The exception to this rule is the null device.
716 if (secondConsole == NULL && strcmp(cons, console)
717 && strcmp(cons, "/dev/null"))
720 newAction = calloc((size_t) (1), sizeof(initAction));
722 message(LOG | CONSOLE, "Memory allocation failure\n");
726 newAction->nextPtr = initActionList;
727 initActionList = newAction;
728 strncpy(newAction->process, process, 255);
729 newAction->action = action;
730 strncpy(newAction->console, cons, 255);
732 // message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n",
733 // newAction->process, newAction->action, newAction->console);
736 static void delete_initAction(initAction * action)
738 initAction *a, *b = NULL;
740 for (a = initActionList; a; b = a, a = a->nextPtr) {
743 initActionList = a->nextPtr;
745 b->nextPtr = a->nextPtr;
753 /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined,
754 * then parse_inittab() simply adds in some default
755 * actions(i.e runs INIT_SCRIPT and then starts a pair
756 * of "askfirst" shells). If BB_FEATURE_USE_INITTAB
757 * _is_ defined, but /etc/inittab is missing, this
758 * results in the same set of default behaviors.
760 static void parse_inittab(void)
762 #ifdef BB_FEATURE_USE_INITTAB
764 char buf[256], lineAsRead[256], tmpConsole[256];
765 char *id, *runlev, *action, *process, *eol;
766 const struct initActionType *a = actions;
770 file = fopen(INITTAB, "r");
772 /* No inittab file -- set up some default behavior */
774 /* Reboot on Ctrl-Alt-Del */
775 new_initAction(CTRLALTDEL, "/sbin/reboot", console);
776 /* Swapoff on halt/reboot */
777 new_initAction(SHUTDOWN, "/sbin/swapoff -a", console);
778 /* Umount all filesystems on halt/reboot */
779 new_initAction(SHUTDOWN, "/bin/umount -a -r", console);
780 /* Askfirst shell on tty1 */
781 new_initAction(ASKFIRST, SHELL, console);
782 /* Askfirst shell on tty2 */
783 if (secondConsole != NULL)
784 new_initAction(ASKFIRST, SHELL, secondConsole);
785 /* Askfirst shell on tty3 */
786 if (thirdConsole != NULL)
787 new_initAction(ASKFIRST, SHELL, thirdConsole);
788 /* Askfirst shell on tty4 */
789 if (fourthConsole != NULL)
790 new_initAction(ASKFIRST, SHELL, fourthConsole);
792 new_initAction(SYSINIT, INIT_SCRIPT, console);
795 #ifdef BB_FEATURE_USE_INITTAB
798 while (fgets(buf, 255, file) != NULL) {
800 /* Skip leading spaces */
801 for (id = buf; *id == ' ' || *id == '\t'; id++);
803 /* Skip the line if it's a comment */
804 if (*id == '#' || *id == '\n')
807 /* Trim the trailing \n */
808 eol = strrchr(id, '\n');
812 /* Keep a copy around for posterity's sake (and error msgs) */
813 strcpy(lineAsRead, buf);
815 /* Separate the ID field from the runlevels */
816 runlev = strchr(id, ':');
817 if (runlev == NULL || *(runlev + 1) == '\0') {
818 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
825 /* Separate the runlevels from the action */
826 action = strchr(runlev, ':');
827 if (action == NULL || *(action + 1) == '\0') {
828 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
835 /* Separate the action from the process */
836 process = strchr(action, ':');
837 if (process == NULL || *(process + 1) == '\0') {
838 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
845 /* Ok, now process it */
847 while (a->name != 0) {
848 if (strcmp(a->name, action) == 0) {
850 strcpy(tmpConsole, "/dev/");
851 strncat(tmpConsole, id, 200);
854 new_initAction(a->action, process, id);
862 /* Choke on an unknown action */
863 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
867 #endif /* BB_FEATURE_USE_INITTAB */
872 extern int init_main(int argc, char **argv)
879 /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
881 #ifdef BB_FEATURE_LINUXRC
882 && strstr(applet_name, "linuxrc") == NULL
888 /* Set up sig handlers -- be sure to
889 * clear all of these in run() */
890 signal(SIGUSR1, halt_signal);
891 signal(SIGUSR2, halt_signal);
892 signal(SIGINT, ctrlaltdel_signal);
893 signal(SIGTERM, reboot_signal);
895 /* Turn off rebooting via CTL-ALT-DEL -- we get a
896 * SIGINT on CAD so we can shut things down gracefully... */
897 init_reboot(RB_DISABLE_CAD);
900 /* Figure out what kernel this is running */
901 kernelVersion = get_kernel_revision();
903 /* Figure out where the default console should be */
906 /* Close whatever files are open, and reset the console. */
914 /* Make sure PATH is set to something sane */
915 putenv("PATH="_PATH_STDPATH);
920 #if ! defined BB_FEATURE_EXTRA_QUIET
924 "init started: %s\r\n", full_version);
927 #if ! defined BB_FEATURE_EXTRA_QUIET
931 "init(%d) started: %s\r\n", getpid(), full_version);
935 /* Make sure there is enough memory to do something useful. */
938 /* Check if we are supposed to be in single user mode */
939 if (argc > 1 && (!strcmp(argv[1], "single") ||
940 !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
941 /* Ask first then start a shell on tty2-4 */
942 if (secondConsole != NULL)
943 new_initAction(ASKFIRST, SHELL, secondConsole);
944 if (thirdConsole != NULL)
945 new_initAction(ASKFIRST, SHELL, thirdConsole);
946 if (fourthConsole != NULL)
947 new_initAction(ASKFIRST, SHELL, fourthConsole);
948 /* Start a shell on tty1 */
949 new_initAction(RESPAWN, SHELL, console);
951 /* Not in single user mode -- see what inittab says */
953 /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined,
954 * then parse_inittab() simply adds in some default
955 * actions(i.e runs INIT_SCRIPT and then starts a pair
956 * of "askfirst" shells */
960 /* Make the command line just say "init" -- thats all, nothing else */
961 fixup_argv(argc, argv, "init");
963 /* Now run everything that needs to be run */
965 /* First run the sysinit command */
966 for (a = initActionList; a; a = tmp) {
968 if (a->action == SYSINIT) {
969 waitfor(a->process, a->console, FALSE);
970 /* Now remove the "sysinit" entry from the list */
971 delete_initAction(a);
974 /* Next run anything that wants to block */
975 for (a = initActionList; a; a = tmp) {
977 if (a->action == WAIT) {
978 waitfor(a->process, a->console, FALSE);
979 /* Now remove the "wait" entry from the list */
980 delete_initAction(a);
983 /* Next run anything to be run only once */
984 for (a = initActionList; a; a = tmp) {
986 if (a->action == ONCE) {
987 run(a->process, a->console, FALSE);
988 /* Now remove the "once" entry from the list */
989 delete_initAction(a);
992 /* If there is nothing else to do, stop */
993 if (initActionList == NULL) {
994 message(LOG | CONSOLE,
995 "No more tasks for init -- sleeping forever.\n");
1000 /* Now run the looping stuff for the rest of forever */
1002 for (a = initActionList; a; a = a->nextPtr) {
1003 /* Only run stuff with pid==0. If they have
1004 * a pid, that means they are still running */
1006 switch (a->action) {
1008 /* run the respawn stuff */
1009 a->pid = run(a->process, a->console, FALSE);
1012 /* run the askfirst stuff */
1013 a->pid = run(a->process, a->console, TRUE);
1015 /* silence the compiler's incessant whining */
1021 /* Wait for a child process to exit */
1022 wpid = wait(&status);
1024 /* Find out who died and clean up their corpse */
1025 for (a = initActionList; a; a = a->nextPtr) {
1026 if (a->pid == wpid) {
1029 "Process '%s' (pid %d) exited. Scheduling it for restart.\n",
1040 c-file-style: "linux"