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>
46 #define bb_need_full_version
47 #define BB_DECLARE_EXTERN
50 # include <sys/syslog.h>
54 /* From <linux/vt.h> */
56 unsigned short v_active; /* active vt */
57 unsigned short v_signal; /* signal to send */
58 unsigned short v_state; /* vt bitmask */
60 static const int VT_GETSTATE = 0x5603; /* get global vt state info */
62 /* From <linux/serial.h> */
63 struct serial_struct {
72 unsigned short close_delay;
73 char reserved_char[2];
75 unsigned short closing_wait; /* time to wait before closing */
76 unsigned short closing_wait2; /* no longer used... */
82 #ifndef RB_HALT_SYSTEM
83 static const int RB_HALT_SYSTEM = 0xcdef0123;
84 static const int RB_ENABLE_CAD = 0x89abcdef;
85 static const int RB_DISABLE_CAD = 0;
86 #define RB_POWER_OFF 0x4321fedc
87 static const int RB_AUTOBOOT = 0x01234567;
88 #if defined(__GLIBC__) || defined (__UCLIBC__)
89 #include <sys/reboot.h>
90 #define init_reboot(magic) reboot(magic)
92 #define init_reboot(magic) reboot(0xfee1dead, 672274793, magic)
97 #define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
101 #if defined BB_FEATURE_INIT_COREDUMPS
103 * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called
104 * before processes are spawned to set core file size as unlimited.
105 * This is for debugging only. Don't use this is production, unless
106 * you want core dumps lying about....
108 #define CORE_ENABLE_FLAG_FILE "/.init_enable_core"
109 #include <sys/resource.h>
110 #include <sys/time.h>
113 #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
115 #if defined(__GLIBC__)
116 #include <sys/kdaemon.h>
118 extern int bdflush (int func, long int data);
119 #endif /* __GLIBC__ */
122 #define VT_PRIMARY "/dev/tty1" /* Primary virtual console */
123 #define VT_SECONDARY "/dev/tty2" /* Virtual console */
124 #define VT_THIRD "/dev/tty3" /* Virtual console */
125 #define VT_FOURTH "/dev/tty4" /* Virtual console */
126 #define VT_LOG "/dev/tty5" /* Virtual console */
127 #define SERIAL_CON0 "/dev/ttyS0" /* Primary serial console */
128 #define SERIAL_CON1 "/dev/ttyS1" /* Serial console */
129 #define SHELL "-/bin/sh" /* Default shell */
130 #define INITTAB "/etc/inittab" /* inittab file location */
132 #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */
135 #define MAXENV 16 /* Number of env. vars */
136 //static const int MAXENV = 16; /* Number of env. vars */
137 static const int LOG = 0x1;
138 static const int CONSOLE = 0x2;
140 /* Allowed init action types */
151 /* A mapping between "inittab" action name strings and action type codes. */
152 typedef struct initActionType {
154 initActionEnum action;
157 static const struct initActionType actions[] = {
158 {"sysinit", SYSINIT},
159 {"respawn", RESPAWN},
160 {"askfirst", ASKFIRST},
163 {"ctrlaltdel", CTRLALTDEL},
164 {"shutdown", SHUTDOWN},
168 /* Set up a linked list of initActions, to be read from inittab */
169 typedef struct initActionTag initAction;
170 struct initActionTag {
175 initActionEnum action;
177 static initAction *initActionList = NULL;
180 static char *secondConsole = VT_SECONDARY;
181 static char *thirdConsole = VT_THIRD;
182 static char *fourthConsole = VT_FOURTH;
183 static char *log = VT_LOG;
184 static int kernelVersion = 0;
185 static char termType[32] = "TERM=linux";
186 static char console[32] = _PATH_CONSOLE;
188 static void delete_initAction(initAction * action);
192 /* Print a message to the specified device.
193 * Device may be bitwise-or'd from LOG | CONSOLE */
194 static void message(int device, char *fmt, ...)
195 __attribute__ ((format (printf, 2, 3)));
196 static void message(int device, char *fmt, ...)
203 /* Log the message to syslogd */
207 va_start(arguments, fmt);
208 vsnprintf(msg, sizeof(msg), fmt, arguments);
210 openlog(applet_name, 0, LOG_USER);
211 syslog(LOG_USER|LOG_INFO, msg);
215 static int log_fd = -1;
217 /* Take full control of the log tty, and never close it.
218 * It's mine, all mine! Muhahahaha! */
221 /* don't even try to log, because there is no such console */
223 /* log to main console instead */
225 } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) {
227 fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log);
232 if ((device & LOG) && (log_fd >= 0)) {
233 va_start(arguments, fmt);
234 vdprintf(log_fd, fmt, arguments);
239 if (device & CONSOLE) {
240 /* Always send console messages to /dev/console so people will see them. */
243 device_open(_PATH_CONSOLE,
244 O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
245 va_start(arguments, fmt);
246 vdprintf(fd, fmt, arguments);
250 fprintf(stderr, "Bummer, can't print: ");
251 va_start(arguments, fmt);
252 vfprintf(stderr, fmt, arguments);
258 /* Set terminal settings to reasonable defaults */
259 static void set_term(int fd)
265 /* set control chars */
266 tty.c_cc[VINTR] = 3; /* C-c */
267 tty.c_cc[VQUIT] = 28; /* C-\ */
268 tty.c_cc[VERASE] = 127; /* C-? */
269 tty.c_cc[VKILL] = 21; /* C-u */
270 tty.c_cc[VEOF] = 4; /* C-d */
271 tty.c_cc[VSTART] = 17; /* C-q */
272 tty.c_cc[VSTOP] = 19; /* C-s */
273 tty.c_cc[VSUSP] = 26; /* C-z */
275 /* use line dicipline 0 */
278 /* Make it be sane */
279 tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
280 tty.c_cflag |= HUPCL|CLOCAL;
283 tty.c_iflag = ICRNL | IXON | IXOFF;
286 tty.c_oflag = OPOST | ONLCR;
290 ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN;
292 tcsetattr(fd, TCSANOW, &tty);
295 /* How much memory does this machine have?
296 Units are kBytes to avoid overflow on 4GB machines */
297 static int check_free_memory()
300 unsigned int result, u, s=10;
302 if (sysinfo(&info) != 0) {
303 perror_msg("Error checking free memory");
307 /* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes.
308 * Kernels 2.4.0 return info.mem_unit in bytes. */
311 while ( (u&1) == 0 && s > 0 ) { u>>=1; s--; }
312 result = (info.totalram>>s) + (info.totalswap>>s);
314 if (result < 0) result = INT_MAX;
318 static void console_init()
321 int tried_devcons = 0;
322 int tried_vtprimary = 0;
324 struct serial_struct sr;
327 if ((s = getenv("TERM")) != NULL) {
328 snprintf(termType, sizeof(termType) - 1, "TERM=%s", s);
331 if ((s = getenv("CONSOLE")) != NULL) {
332 snprintf(console, sizeof(console) - 1, "%s", s);
335 /* sparc kernel supports console=tty[ab] parameter which is also
336 * passed to init, so catch it here */
337 else if ((s = getenv("console")) != NULL) {
338 /* remap tty[ab] to /dev/ttyS[01] */
339 if (strcmp(s, "ttya") == 0)
340 snprintf(console, sizeof(console) - 1, "%s", SERIAL_CON0);
341 else if (strcmp(s, "ttyb") == 0)
342 snprintf(console, sizeof(console) - 1, "%s", SERIAL_CON1);
346 /* 2.2 kernels: identify the real console backend and try to use it */
347 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
348 /* this is a serial console */
349 snprintf(console, sizeof(console) - 1, "/dev/ttyS%d", sr.line);
350 } else if (ioctl(0, VT_GETSTATE, &vt) == 0) {
351 /* this is linux virtual tty */
352 snprintf(console, sizeof(console) - 1, "/dev/tty%d",
355 snprintf(console, sizeof(console) - 1, "%s", _PATH_CONSOLE);
360 while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
361 /* Can't open selected console -- try /dev/console */
362 if (!tried_devcons) {
364 snprintf(console, sizeof(console) - 1, "%s", _PATH_CONSOLE);
367 /* Can't open selected console -- try vt1 */
368 if (!tried_vtprimary) {
370 snprintf(console, sizeof(console) - 1, "%s", VT_PRIMARY);
376 /* Perhaps we should panic here? */
377 snprintf(console, sizeof(console) - 1, "/dev/null");
379 /* check for serial console and disable logging to tty5 & running a
381 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
383 secondConsole = NULL;
385 fourthConsole = NULL;
386 /* Force the TERM setting to vt102 for serial console --
387 * iff TERM is set to linux (the default) */
388 if (strcmp( termType, "TERM=linux" ) == 0)
389 snprintf(termType, sizeof(termType) - 1, "TERM=vt102");
390 message(LOG | CONSOLE,
391 "serial console detected. Disabling virtual terminals.\r\n");
395 message(LOG, "console=%s\n", console);
398 static void fixup_argv(int argc, char **argv, char *new_argv0)
401 /* Fix up argv[0] to be certain we claim to be init */
402 len = strlen(argv[0]);
403 memset(argv[0], 0, len);
404 strncpy(argv[0], new_argv0, len);
406 /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */
409 memset(argv[len], 0, strlen(argv[len]));
415 static pid_t run(char *command, char *terminal, int get_enter)
421 char *cmd[255], *cmdpath;
424 static const char press_enter[] =
426 #ifdef CUSTOMIZED_BANNER
427 #include CUSTOMIZED_BANNER
430 "\nPlease press Enter to activate this console. ";
431 char *environment[MAXENV+1] = {
434 "PATH=/usr/bin:/bin:/usr/sbin:/sbin",
440 /* inherit environment to the child, merging our values -andy */
441 for (i=0; environ[i]; i++) {
442 for (j=0; environment[j]; j++) {
443 s = strchr(environment[j], '=');
444 if (!strncmp(environ[i], environment[j], s - environment[j]))
447 if (!environment[j]) {
448 environment[j++] = environ[i];
449 environment[j] = NULL;
453 if ((pid = fork()) == 0) {
455 ioctl(0, TIOCNOTTY, 0);
461 /* Reset signal handlers set for parent process */
462 signal(SIGUSR1, SIG_DFL);
463 signal(SIGUSR2, SIG_DFL);
464 signal(SIGINT, SIG_DFL);
465 signal(SIGTERM, SIG_DFL);
466 signal(SIGHUP, SIG_DFL);
468 if ((fd = device_open(terminal, O_RDWR)) < 0) {
469 if (stat(terminal, &sb) != 0) {
470 message(LOG | CONSOLE, "device '%s' does not exist.\n",
474 message(LOG | CONSOLE, "Bummer, can't open %s\r\n", terminal);
480 ioctl(0, TIOCSCTTY, 1);
481 tcsetpgrp(0, getpgrp());
484 /* See if any special /bin/sh requiring characters are present */
485 if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
488 strcpy(buf, "exec ");
489 strncat(buf, command, sizeof(buf) - strlen(buf) - 1);
493 /* Convert command (char*) into cmd (char**, one word per string) */
494 for (tmpCmd = command, i = 0;
495 (tmpCmd = strsep(&command, " \t")) != NULL;) {
496 if (*tmpCmd != '\0') {
508 Interactive shells want to see a dash in argv[0]. This
509 typically is handled by login, argv will be setup this
510 way if a dash appears at the front of the command path
514 if (*cmdpath == '-') {
516 /* skip over the dash */
519 /* find the last component in the command pathname */
520 s = get_last_path_component(cmdpath);
522 /* make a new argv[0] */
523 if ((cmd[0] = malloc(strlen(s)+2)) == NULL) {
524 message(LOG | CONSOLE, "malloc failed");
532 if (get_enter == TRUE) {
534 * Save memory by not exec-ing anything large (like a shell)
535 * before the user wants it. This is critical if swap is not
536 * enabled and the system has low memory. Generally this will
537 * be run on the second virtual console, and the first will
538 * be allowed to start a shell or whatever an init script
542 message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
543 cmd[0], getpid(), terminal);
545 write(fileno(stdout), press_enter, sizeof(press_enter) - 1);
550 /* Log the process name and args */
551 message(LOG, "Starting pid %d, console %s: '%s'\r\n",
552 getpid(), terminal, command);
555 #if defined BB_FEATURE_INIT_COREDUMPS
556 if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) {
558 limit.rlim_cur = RLIM_INFINITY;
559 limit.rlim_max = RLIM_INFINITY;
560 setrlimit(RLIMIT_CORE, &limit);
564 /* Now run it. The new program will take over this PID,
565 * so nothing further in init.c should be run. */
566 execve(cmdpath, cmd, environment);
568 /* We're still here? Some error happened. */
569 message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath,
576 static int waitfor(char *command, char *terminal, int get_enter)
579 int pid = run(command, terminal, get_enter);
582 wpid = wait(&status);
583 if (wpid > 0 && wpid != pid) {
592 /* Make sure there is enough memory to do something useful. *
593 * Calls "swapon -a" if needed so be sure /etc/fstab is present... */
594 static void check_memory()
598 if (check_free_memory() > 1000)
601 if (stat("/etc/fstab", &statBuf) == 0) {
602 /* swapon -a requires /proc typically */
603 waitfor("mount proc /proc -t proc", console, FALSE);
604 /* Try to turn on swap */
605 waitfor("swapon -a", console, FALSE);
606 if (check_free_memory() < 1000)
614 "Sorry, your computer does not have enough memory.\r\n");
619 /* Run all commands to be run right before halt/reboot */
620 static void run_actions(initActionEnum action)
623 for (a = initActionList; a; a = tmp) {
625 if (a->action == action) {
626 waitfor(a->process, a->console, FALSE);
627 delete_initAction(a);
634 static void shutdown_system(void)
637 /* first disable our SIGHUP signal */
638 signal(SIGHUP, SIG_DFL);
640 /* Allow Ctrl-Alt-Del to reboot system. */
641 init_reboot(RB_ENABLE_CAD);
643 message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n");
646 /* Send signals to every process _except_ pid 1 */
647 message(CONSOLE|LOG, "Sending SIGTERM to all processes.\r\n");
652 message(CONSOLE|LOG, "Sending SIGKILL to all processes.\r\n");
656 /* run everything to be run at "ctrlaltdel" */
657 run_actions(SHUTDOWN);
660 if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) {
661 /* bdflush, kupdate not needed for kernels >2.2.11 */
667 static void halt_signal(int sig)
671 "The system is halted. Press %s or turn off power\r\n",
672 (secondConsole == NULL) /* serial console */
673 ? "Reset" : "CTRL-ALT-DEL");
676 /* allow time for last message to reach serial console */
679 if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0))
680 init_reboot(RB_POWER_OFF);
682 init_reboot(RB_HALT_SYSTEM);
686 static void reboot_signal(int sig)
689 message(CONSOLE|LOG, "Please stand by while rebooting the system.\r\n");
692 /* allow time for last message to reach serial console */
695 init_reboot(RB_AUTOBOOT);
699 static void ctrlaltdel_signal(int sig)
701 run_actions(CTRLALTDEL);
704 #endif /* ! DEBUG_INIT */
706 static void new_initAction(initActionEnum action, char *process, char *cons)
708 initAction *newAction;
713 /* If BusyBox detects that a serial console is in use,
714 * then entries not refering to the console or null devices will _not_ be run.
715 * The exception to this rule is the null device.
717 if (secondConsole == NULL && strcmp(cons, console)
718 && strcmp(cons, "/dev/null"))
721 newAction = calloc((size_t) (1), sizeof(initAction));
723 message(LOG | CONSOLE, "Memory allocation failure\n");
727 newAction->nextPtr = initActionList;
728 initActionList = newAction;
729 strncpy(newAction->process, process, 255);
730 newAction->action = action;
731 strncpy(newAction->console, cons, 255);
733 // message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n",
734 // newAction->process, newAction->action, newAction->console);
737 static void delete_initAction(initAction * action)
739 initAction *a, *b = NULL;
741 for (a = initActionList; a; b = a, a = a->nextPtr) {
744 initActionList = a->nextPtr;
746 b->nextPtr = a->nextPtr;
754 /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined,
755 * then parse_inittab() simply adds in some default
756 * actions(i.e runs INIT_SCRIPT and then starts a pair
757 * of "askfirst" shells). If BB_FEATURE_USE_INITTAB
758 * _is_ defined, but /etc/inittab is missing, this
759 * results in the same set of default behaviors.
761 static void parse_inittab(void)
763 #ifdef BB_FEATURE_USE_INITTAB
765 char buf[256], lineAsRead[256], tmpConsole[256];
766 char *id, *runlev, *action, *process, *eol;
767 const struct initActionType *a = actions;
771 file = fopen(INITTAB, "r");
773 /* No inittab file -- set up some default behavior */
775 /* Reboot on Ctrl-Alt-Del */
776 new_initAction(CTRLALTDEL, "/sbin/reboot", console);
777 /* Swapoff on halt/reboot */
778 new_initAction(SHUTDOWN, "/sbin/swapoff -a", console);
779 /* Umount all filesystems on halt/reboot */
780 new_initAction(SHUTDOWN, "/bin/umount -a -r", console);
781 /* Askfirst shell on tty1 */
782 new_initAction(ASKFIRST, SHELL, console);
783 /* Askfirst shell on tty2 */
784 if (secondConsole != NULL)
785 new_initAction(ASKFIRST, SHELL, secondConsole);
786 /* Askfirst shell on tty3 */
787 if (thirdConsole != NULL)
788 new_initAction(ASKFIRST, SHELL, thirdConsole);
789 /* Askfirst shell on tty4 */
790 if (fourthConsole != NULL)
791 new_initAction(ASKFIRST, SHELL, fourthConsole);
793 new_initAction(SYSINIT, INIT_SCRIPT, console);
796 #ifdef BB_FEATURE_USE_INITTAB
799 while (fgets(buf, 255, file) != NULL) {
801 /* Skip leading spaces */
802 for (id = buf; *id == ' ' || *id == '\t'; id++);
804 /* Skip the line if it's a comment */
805 if (*id == '#' || *id == '\n')
808 /* Trim the trailing \n */
809 eol = strrchr(id, '\n');
813 /* Keep a copy around for posterity's sake (and error msgs) */
814 strcpy(lineAsRead, buf);
816 /* Separate the ID field from the runlevels */
817 runlev = strchr(id, ':');
818 if (runlev == NULL || *(runlev + 1) == '\0') {
819 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
826 /* Separate the runlevels from the action */
827 action = strchr(runlev, ':');
828 if (action == NULL || *(action + 1) == '\0') {
829 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
836 /* Separate the action from the process */
837 process = strchr(action, ':');
838 if (process == NULL || *(process + 1) == '\0') {
839 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
846 /* Ok, now process it */
848 while (a->name != 0) {
849 if (strcmp(a->name, action) == 0) {
851 strcpy(tmpConsole, "/dev/");
852 strncat(tmpConsole, id, 200);
855 new_initAction(a->action, process, id);
863 /* Choke on an unknown action */
864 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
868 #endif /* BB_FEATURE_USE_INITTAB */
873 extern int init_main(int argc, char **argv)
880 /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
882 #ifdef BB_FEATURE_LINUXRC
883 && strstr(applet_name, "linuxrc") == NULL
889 /* Set up sig handlers -- be sure to
890 * clear all of these in run() */
891 signal(SIGUSR1, halt_signal);
892 signal(SIGUSR2, halt_signal);
893 signal(SIGINT, ctrlaltdel_signal);
894 signal(SIGTERM, reboot_signal);
896 /* Turn off rebooting via CTL-ALT-DEL -- we get a
897 * SIGINT on CAD so we can shut things down gracefully... */
898 init_reboot(RB_DISABLE_CAD);
901 /* Figure out what kernel this is running */
902 kernelVersion = get_kernel_revision();
904 /* Figure out where the default console should be */
907 /* Close whatever files are open, and reset the console. */
915 /* Make sure PATH is set to something sane */
916 putenv("PATH="_PATH_STDPATH);
921 #if ! defined BB_FEATURE_EXTRA_QUIET
925 "init started: %s\r\n", full_version);
928 #if ! defined BB_FEATURE_EXTRA_QUIET
932 "init(%d) started: %s\r\n", getpid(), full_version);
936 /* Make sure there is enough memory to do something useful. */
939 /* Check if we are supposed to be in single user mode */
940 if (argc > 1 && (!strcmp(argv[1], "single") ||
941 !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
942 /* Ask first then start a shell on tty2-4 */
943 if (secondConsole != NULL)
944 new_initAction(ASKFIRST, SHELL, secondConsole);
945 if (thirdConsole != NULL)
946 new_initAction(ASKFIRST, SHELL, thirdConsole);
947 if (fourthConsole != NULL)
948 new_initAction(ASKFIRST, SHELL, fourthConsole);
949 /* Start a shell on tty1 */
950 new_initAction(RESPAWN, SHELL, console);
952 /* Not in single user mode -- see what inittab says */
954 /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined,
955 * then parse_inittab() simply adds in some default
956 * actions(i.e runs INIT_SCRIPT and then starts a pair
957 * of "askfirst" shells */
961 /* Make the command line just say "init" -- thats all, nothing else */
962 fixup_argv(argc, argv, "init");
964 /* Now run everything that needs to be run */
966 /* First run the sysinit command */
967 for (a = initActionList; a; a = tmp) {
969 if (a->action == SYSINIT) {
970 waitfor(a->process, a->console, FALSE);
971 /* Now remove the "sysinit" entry from the list */
972 delete_initAction(a);
975 /* Next run anything that wants to block */
976 for (a = initActionList; a; a = tmp) {
978 if (a->action == WAIT) {
979 waitfor(a->process, a->console, FALSE);
980 /* Now remove the "wait" entry from the list */
981 delete_initAction(a);
984 /* Next run anything to be run only once */
985 for (a = initActionList; a; a = tmp) {
987 if (a->action == ONCE) {
988 run(a->process, a->console, FALSE);
989 /* Now remove the "once" entry from the list */
990 delete_initAction(a);
993 /* If there is nothing else to do, stop */
994 if (initActionList == NULL) {
995 message(LOG | CONSOLE,
996 "No more tasks for init -- sleeping forever.\n");
1001 /* Now run the looping stuff for the rest of forever */
1003 for (a = initActionList; a; a = a->nextPtr) {
1004 /* Only run stuff with pid==0. If they have
1005 * a pid, that means they are still running */
1007 switch (a->action) {
1009 /* run the respawn stuff */
1010 a->pid = run(a->process, a->console, FALSE);
1013 /* run the askfirst stuff */
1014 a->pid = run(a->process, a->console, TRUE);
1016 /* silence the compiler's incessant whining */
1022 /* Wait for a child process to exit */
1023 wpid = wait(&status);
1025 /* Find out who died and clean up their corpse */
1026 for (a = initActionList; a; a = a->nextPtr) {
1027 if (a->pid == wpid) {
1030 "Process '%s' (pid %d) exited. Scheduling it for restart.\n",
1041 c-file-style: "linux"