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) || defined(__dietlibc__)
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 LOGIN_SHELL "-" SHELL /* Default login shell */
129 #define INITTAB "/etc/inittab" /* inittab file location */
131 #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */
134 #define MAXENV 16 /* Number of env. vars */
135 //static const int MAXENV = 16; /* Number of env. vars */
136 static const int LOG = 0x1;
137 static const int CONSOLE = 0x2;
139 /* Allowed init action types */
150 /* A mapping between "inittab" action name strings and action type codes. */
151 typedef struct initActionType {
153 initActionEnum action;
156 static const struct initActionType actions[] = {
157 {"sysinit", SYSINIT},
158 {"respawn", RESPAWN},
159 {"askfirst", ASKFIRST},
162 {"ctrlaltdel", CTRLALTDEL},
163 {"shutdown", SHUTDOWN},
167 /* Set up a linked list of initActions, to be read from inittab */
168 typedef struct initActionTag initAction;
169 struct initActionTag {
174 initActionEnum action;
176 static initAction *initActionList = NULL;
179 static char *secondConsole = VT_SECONDARY;
180 static char *thirdConsole = VT_THIRD;
181 static char *fourthConsole = VT_FOURTH;
182 static char *log = VT_LOG;
183 static int kernelVersion = 0;
184 static char termType[32] = "TERM=linux";
185 static char console[32] = _PATH_CONSOLE;
187 static void delete_initAction(initAction * action);
189 static void loop_forever()
195 /* Print a message to the specified device.
196 * Device may be bitwise-or'd from LOG | CONSOLE */
197 static void message(int device, char *fmt, ...)
198 __attribute__ ((format (printf, 2, 3)));
199 static void message(int device, char *fmt, ...)
206 /* Log the message to syslogd */
210 va_start(arguments, fmt);
211 vsnprintf(msg, sizeof(msg), fmt, arguments);
213 openlog(applet_name, 0, LOG_USER);
214 syslog(LOG_USER|LOG_INFO, msg);
218 static int log_fd = -1;
220 /* Take full control of the log tty, and never close it.
221 * It's mine, all mine! Muhahahaha! */
224 /* don't even try to log, because there is no such console */
226 /* log to main console instead */
228 } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) {
230 fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log);
235 if ((device & LOG) && (log_fd >= 0)) {
236 va_start(arguments, fmt);
237 vdprintf(log_fd, fmt, arguments);
242 if (device & CONSOLE) {
243 /* Always send console messages to /dev/console so people will see them. */
246 device_open(_PATH_CONSOLE,
247 O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
248 va_start(arguments, fmt);
249 vdprintf(fd, fmt, arguments);
253 fprintf(stderr, "Bummer, can't print: ");
254 va_start(arguments, fmt);
255 vfprintf(stderr, fmt, arguments);
261 /* Set terminal settings to reasonable defaults */
262 static void set_term(int fd)
268 /* set control chars */
269 tty.c_cc[VINTR] = 3; /* C-c */
270 tty.c_cc[VQUIT] = 28; /* C-\ */
271 tty.c_cc[VERASE] = 127; /* C-? */
272 tty.c_cc[VKILL] = 21; /* C-u */
273 tty.c_cc[VEOF] = 4; /* C-d */
274 tty.c_cc[VSTART] = 17; /* C-q */
275 tty.c_cc[VSTOP] = 19; /* C-s */
276 tty.c_cc[VSUSP] = 26; /* C-z */
278 /* use line dicipline 0 */
281 /* Make it be sane */
282 tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
283 tty.c_cflag |= CREAD|HUPCL|CLOCAL;
287 tty.c_iflag = ICRNL | IXON | IXOFF;
290 tty.c_oflag = OPOST | ONLCR;
294 ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN;
296 tcsetattr(fd, TCSANOW, &tty);
299 /* How much memory does this machine have?
300 Units are kBytes to avoid overflow on 4GB machines */
301 static int check_free_memory()
304 unsigned int result, u, s=10;
306 if (sysinfo(&info) != 0) {
307 perror_msg("Error checking free memory");
311 /* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes.
312 * Kernels 2.4.0 return info.mem_unit in bytes. */
315 while ( (u&1) == 0 && s > 0 ) { u>>=1; s--; }
316 result = (info.totalram>>s) + (info.totalswap>>s);
318 if (result < 0) result = INT_MAX;
322 static void console_init()
325 int tried_devcons = 0;
326 int tried_vtprimary = 0;
328 struct serial_struct sr;
331 if ((s = getenv("TERM")) != NULL) {
332 snprintf(termType, sizeof(termType) - 1, "TERM=%s", s);
335 if ((s = getenv("CONSOLE")) != NULL) {
336 safe_strncpy(console, s, sizeof(console));
339 /* sparc kernel supports console=tty[ab] parameter which is also
340 * passed to init, so catch it here */
341 else if ((s = getenv("console")) != NULL) {
342 /* remap tty[ab] to /dev/ttyS[01] */
343 if (strcmp(s, "ttya") == 0)
344 safe_strncpy(console, SERIAL_CON0, sizeof(console));
345 else if (strcmp(s, "ttyb") == 0)
346 safe_strncpy(console, SERIAL_CON1, sizeof(console));
350 /* 2.2 kernels: identify the real console backend and try to use it */
351 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
352 /* this is a serial console */
353 snprintf(console, sizeof(console) - 1, "/dev/ttyS%d", sr.line);
354 } else if (ioctl(0, VT_GETSTATE, &vt) == 0) {
355 /* this is linux virtual tty */
356 snprintf(console, sizeof(console) - 1, "/dev/tty%d",
359 safe_strncpy(console, _PATH_CONSOLE, sizeof(console));
364 while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
365 /* Can't open selected console -- try /dev/console */
366 if (!tried_devcons) {
368 safe_strncpy(console, _PATH_CONSOLE, sizeof(console));
371 /* Can't open selected console -- try vt1 */
372 if (!tried_vtprimary) {
374 safe_strncpy(console, VT_PRIMARY, sizeof(console));
380 /* Perhaps we should panic here? */
381 safe_strncpy(console, "/dev/null", sizeof(console));
383 /* check for serial console and disable logging to tty5 & running a
385 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
387 secondConsole = NULL;
389 fourthConsole = NULL;
390 /* Force the TERM setting to vt102 for serial console --
391 * iff TERM is set to linux (the default) */
392 if (strcmp( termType, "TERM=linux" ) == 0)
393 safe_strncpy(termType, "TERM=vt102", sizeof(termType));
394 message(LOG | CONSOLE,
395 "serial console detected. Disabling virtual terminals.\r\n");
399 message(LOG, "console=%s\n", console);
402 static void fixup_argv(int argc, char **argv, char *new_argv0)
405 /* Fix up argv[0] to be certain we claim to be init */
406 len = strlen(argv[0]);
407 memset(argv[0], 0, len);
408 strncpy(argv[0], new_argv0, len);
410 /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */
413 memset(argv[len], 0, strlen(argv[len]));
419 static pid_t run(char *command, char *terminal, int get_enter)
425 char *cmd[255], *cmdpath;
428 static const char press_enter[] =
430 #ifdef CUSTOMIZED_BANNER
431 #include CUSTOMIZED_BANNER
434 "\nPlease press Enter to activate this console. ";
435 char *environment[MAXENV+1] = {
438 "PATH=/usr/bin:/bin:/usr/sbin:/sbin",
444 /* inherit environment to the child, merging our values -andy */
445 for (i=0; environ[i]; i++) {
446 for (j=0; environment[j]; j++) {
447 s = strchr(environment[j], '=');
448 if (!strncmp(environ[i], environment[j], s - environment[j]))
451 if (!environment[j]) {
452 environment[j++] = environ[i];
453 environment[j] = NULL;
457 if ((pid = fork()) == 0) {
459 ioctl(0, TIOCNOTTY, 0);
465 /* Reset signal handlers set for parent process */
466 signal(SIGUSR1, SIG_DFL);
467 signal(SIGUSR2, SIG_DFL);
468 signal(SIGINT, SIG_DFL);
469 signal(SIGTERM, SIG_DFL);
470 signal(SIGHUP, SIG_DFL);
472 if ((fd = device_open(terminal, O_RDWR)) < 0) {
473 if (stat(terminal, &sb) != 0) {
474 message(LOG | CONSOLE, "device '%s' does not exist.\n",
478 message(LOG | CONSOLE, "Bummer, can't open %s\r\n", terminal);
484 ioctl(0, TIOCSCTTY, 1);
485 tcsetpgrp(0, getpgrp());
488 /* See if any special /bin/sh requiring characters are present */
489 if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
492 strcpy(buf, "exec ");
493 strncat(buf, command, sizeof(buf) - strlen(buf) - 1);
497 /* Convert command (char*) into cmd (char**, one word per string) */
498 for (tmpCmd = command, i = 0;
499 (tmpCmd = strsep(&command, " \t")) != NULL;) {
500 if (*tmpCmd != '\0') {
512 Interactive shells want to see a dash in argv[0]. This
513 typically is handled by login, argv will be setup this
514 way if a dash appears at the front of the command path
518 if (*cmdpath == '-') {
520 /* skip over the dash */
523 /* find the last component in the command pathname */
524 s = get_last_path_component(cmdpath);
526 /* make a new argv[0] */
527 if ((cmd[0] = malloc(strlen(s)+2)) == NULL) {
528 message(LOG | CONSOLE, "malloc failed");
536 if (get_enter == TRUE) {
538 * Save memory by not exec-ing anything large (like a shell)
539 * before the user wants it. This is critical if swap is not
540 * enabled and the system has low memory. Generally this will
541 * be run on the second virtual console, and the first will
542 * be allowed to start a shell or whatever an init script
546 message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
547 cmd[0], getpid(), terminal);
549 write(fileno(stdout), press_enter, sizeof(press_enter) - 1);
554 /* Log the process name and args */
555 message(LOG, "Starting pid %d, console %s: '%s'\r\n",
556 getpid(), terminal, command);
559 #if defined BB_FEATURE_INIT_COREDUMPS
560 if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) {
562 limit.rlim_cur = RLIM_INFINITY;
563 limit.rlim_max = RLIM_INFINITY;
564 setrlimit(RLIMIT_CORE, &limit);
568 /* Now run it. The new program will take over this PID,
569 * so nothing further in init.c should be run. */
570 execve(cmdpath, cmd, environment);
572 /* We're still here? Some error happened. */
573 message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath,
580 static int waitfor(char *command, char *terminal, int get_enter)
583 int pid = run(command, terminal, get_enter);
586 wpid = wait(&status);
587 if (wpid > 0 && wpid != pid) {
596 /* Make sure there is enough memory to do something useful. *
597 * Calls "swapon -a" if needed so be sure /etc/fstab is present... */
598 static void check_memory()
602 if (check_free_memory() > 1000)
605 if (stat("/etc/fstab", &statBuf) == 0) {
606 /* swapon -a requires /proc typically */
607 waitfor("mount proc /proc -t proc", console, FALSE);
608 /* Try to turn on swap */
609 waitfor("swapon -a", console, FALSE);
610 if (check_free_memory() < 1000)
618 "Sorry, your computer does not have enough memory.\r\n");
622 /* Run all commands to be run right before halt/reboot */
623 static void run_actions(initActionEnum action)
626 for (a = initActionList; a; a = tmp) {
628 if (a->action == action) {
629 waitfor(a->process, a->console, FALSE);
630 delete_initAction(a);
637 static void shutdown_system(void)
640 /* first disable our SIGHUP signal */
641 signal(SIGHUP, SIG_DFL);
643 /* Allow Ctrl-Alt-Del to reboot system. */
644 init_reboot(RB_ENABLE_CAD);
646 message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n");
649 /* Send signals to every process _except_ pid 1 */
650 message(CONSOLE|LOG, "Sending SIGTERM to all processes.\r\n");
655 message(CONSOLE|LOG, "Sending SIGKILL to all processes.\r\n");
659 /* run everything to be run at "shutdown" */
660 run_actions(SHUTDOWN);
663 if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) {
664 /* bdflush, kupdate not needed for kernels >2.2.11 */
670 static void halt_signal(int sig)
674 "The system is halted. Press %s or turn off power\r\n",
675 (secondConsole == NULL) /* serial console */
676 ? "Reset" : "CTRL-ALT-DEL");
679 /* allow time for last message to reach serial console */
682 if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0))
683 init_reboot(RB_POWER_OFF);
685 init_reboot(RB_HALT_SYSTEM);
690 static void reboot_signal(int sig)
693 message(CONSOLE|LOG, "Please stand by while rebooting the system.\r\n");
696 /* allow time for last message to reach serial console */
699 init_reboot(RB_AUTOBOOT);
704 static void ctrlaltdel_signal(int sig)
706 run_actions(CTRLALTDEL);
709 #endif /* ! DEBUG_INIT */
711 static void new_initAction(initActionEnum action, char *process, char *cons)
713 initAction *newAction;
718 /* If BusyBox detects that a serial console is in use,
719 * then entries not refering to the console or null devices will _not_ be run.
720 * The exception to this rule is the null device.
722 if (secondConsole == NULL && strcmp(cons, console)
723 && strcmp(cons, "/dev/null"))
726 newAction = calloc((size_t) (1), sizeof(initAction));
728 message(LOG | CONSOLE, "Memory allocation failure\n");
731 newAction->nextPtr = initActionList;
732 initActionList = newAction;
733 strncpy(newAction->process, process, 255);
734 newAction->action = action;
735 strncpy(newAction->console, cons, 255);
737 // message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n",
738 // newAction->process, newAction->action, newAction->console);
741 static void delete_initAction(initAction * action)
743 initAction *a, *b = NULL;
745 for (a = initActionList; a; b = a, a = a->nextPtr) {
748 initActionList = a->nextPtr;
750 b->nextPtr = a->nextPtr;
758 /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined,
759 * then parse_inittab() simply adds in some default
760 * actions(i.e., runs INIT_SCRIPT and then starts a pair
761 * of "askfirst" shells). If BB_FEATURE_USE_INITTAB
762 * _is_ defined, but /etc/inittab is missing, this
763 * results in the same set of default behaviors.
765 static void parse_inittab(void)
767 #ifdef BB_FEATURE_USE_INITTAB
769 char buf[256], lineAsRead[256], tmpConsole[256];
770 char *id, *runlev, *action, *process, *eol;
771 const struct initActionType *a = actions;
775 file = fopen(INITTAB, "r");
777 /* No inittab file -- set up some default behavior */
779 /* Reboot on Ctrl-Alt-Del */
780 new_initAction(CTRLALTDEL, "/sbin/reboot", console);
781 /* Swapoff on halt/reboot */
782 new_initAction(SHUTDOWN, "/sbin/swapoff -a", console);
783 /* Umount all filesystems on halt/reboot */
784 new_initAction(SHUTDOWN, "/bin/umount -a -r", console);
785 /* Askfirst shell on tty1 */
786 new_initAction(ASKFIRST, LOGIN_SHELL, console);
787 /* Askfirst shell on tty2 */
788 if (secondConsole != NULL)
789 new_initAction(ASKFIRST, LOGIN_SHELL, secondConsole);
790 /* Askfirst shell on tty3 */
791 if (thirdConsole != NULL)
792 new_initAction(ASKFIRST, LOGIN_SHELL, thirdConsole);
793 /* Askfirst shell on tty4 */
794 if (fourthConsole != NULL)
795 new_initAction(ASKFIRST, LOGIN_SHELL, fourthConsole);
797 new_initAction(SYSINIT, INIT_SCRIPT, console);
800 #ifdef BB_FEATURE_USE_INITTAB
803 while (fgets(buf, 255, file) != NULL) {
805 /* Skip leading spaces */
806 for (id = buf; *id == ' ' || *id == '\t'; id++);
808 /* Skip the line if it's a comment */
809 if (*id == '#' || *id == '\n')
812 /* Trim the trailing \n */
813 eol = strrchr(id, '\n');
817 /* Keep a copy around for posterity's sake (and error msgs) */
818 strcpy(lineAsRead, buf);
820 /* Separate the ID field from the runlevels */
821 runlev = strchr(id, ':');
822 if (runlev == NULL || *(runlev + 1) == '\0') {
823 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
830 /* Separate the runlevels from the action */
831 action = strchr(runlev, ':');
832 if (action == NULL || *(action + 1) == '\0') {
833 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
840 /* Separate the action from the process */
841 process = strchr(action, ':');
842 if (process == NULL || *(process + 1) == '\0') {
843 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
850 /* Ok, now process it */
852 while (a->name != 0) {
853 if (strcmp(a->name, action) == 0) {
855 strcpy(tmpConsole, "/dev/");
856 strncat(tmpConsole, id, 200);
859 new_initAction(a->action, process, id);
867 /* Choke on an unknown action */
868 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
872 #endif /* BB_FEATURE_USE_INITTAB */
877 extern int init_main(int argc, char **argv)
884 /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
886 #ifdef BB_FEATURE_LINUXRC
887 && strstr(applet_name, "linuxrc") == NULL
893 /* Set up sig handlers -- be sure to
894 * clear all of these in run() */
895 signal(SIGUSR1, halt_signal);
896 signal(SIGUSR2, halt_signal);
897 signal(SIGINT, ctrlaltdel_signal);
898 signal(SIGTERM, reboot_signal);
900 /* Turn off rebooting via CTL-ALT-DEL -- we get a
901 * SIGINT on CAD so we can shut things down gracefully... */
902 init_reboot(RB_DISABLE_CAD);
905 /* Figure out what kernel this is running */
906 kernelVersion = get_kernel_revision();
908 /* Figure out where the default console should be */
911 /* Close whatever files are open, and reset the console. */
919 /* Make sure PATH is set to something sane */
920 putenv("PATH="_PATH_STDPATH);
925 #if ! defined BB_FEATURE_EXTRA_QUIET
929 "init started: %s\r\n", full_version);
932 #if ! defined BB_FEATURE_EXTRA_QUIET
936 "init(%d) started: %s\r\n", getpid(), full_version);
940 /* Make sure there is enough memory to do something useful. */
943 /* Check if we are supposed to be in single user mode */
944 if (argc > 1 && (!strcmp(argv[1], "single") ||
945 !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
946 /* Ask first then start a shell on tty2-4 */
947 if (secondConsole != NULL)
948 new_initAction(ASKFIRST, LOGIN_SHELL, secondConsole);
949 if (thirdConsole != NULL)
950 new_initAction(ASKFIRST, LOGIN_SHELL, thirdConsole);
951 if (fourthConsole != NULL)
952 new_initAction(ASKFIRST, LOGIN_SHELL, fourthConsole);
953 /* Start a shell on tty1 */
954 new_initAction(RESPAWN, LOGIN_SHELL, console);
956 /* Not in single user mode -- see what inittab says */
958 /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined,
959 * then parse_inittab() simply adds in some default
960 * actions(i.e., runs INIT_SCRIPT and then starts a pair
961 * of "askfirst" shells */
965 /* Make the command line just say "init" -- thats all, nothing else */
966 fixup_argv(argc, argv, "init");
968 /* Now run everything that needs to be run */
970 /* First run the sysinit command */
971 for (a = initActionList; a; a = tmp) {
973 if (a->action == SYSINIT) {
974 waitfor(a->process, a->console, FALSE);
975 /* Now remove the "sysinit" entry from the list */
976 delete_initAction(a);
979 /* Next run anything that wants to block */
980 for (a = initActionList; a; a = tmp) {
982 if (a->action == WAIT) {
983 waitfor(a->process, a->console, FALSE);
984 /* Now remove the "wait" entry from the list */
985 delete_initAction(a);
988 /* Next run anything to be run only once */
989 for (a = initActionList; a; a = tmp) {
991 if (a->action == ONCE) {
992 run(a->process, a->console, FALSE);
993 /* Now remove the "once" entry from the list */
994 delete_initAction(a);
997 /* If there is nothing else to do, stop */
998 if (initActionList == NULL) {
999 message(LOG | CONSOLE,
1000 "No more tasks for init -- sleeping forever.\n");
1004 /* Now run the looping stuff for the rest of forever */
1006 for (a = initActionList; a; a = a->nextPtr) {
1007 /* Only run stuff with pid==0. If they have
1008 * a pid, that means they are still running */
1010 switch (a->action) {
1012 /* run the respawn stuff */
1013 a->pid = run(a->process, a->console, FALSE);
1016 /* run the askfirst stuff */
1017 a->pid = run(a->process, a->console, TRUE);
1019 /* silence the compiler's incessant whining */
1025 /* Wait for a child process to exit */
1026 wpid = wait(&status);
1028 /* Find out who died and clean up their corpse */
1029 for (a = initActionList; a; a = a->nextPtr) {
1030 if (a->pid == wpid) {
1033 "Process '%s' (pid %d) exited. Scheduling it for restart.\n",
1044 c-file-style: "linux"