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 <asm/types.h>
41 #include <linux/serial.h> /* for serial_struct */
42 #include <linux/version.h>
43 #include <linux/reboot.h>
44 #include <linux/unistd.h>
45 #include <sys/fcntl.h>
46 #include <sys/ioctl.h>
47 #include <sys/mount.h>
48 #include <sys/types.h>
49 #include <sys/vt.h> /* for vt_stat */
52 # include <sys/syslog.h>
56 #ifndef RB_HALT_SYSTEM
57 #define RB_HALT_SYSTEM 0xcdef0123
58 #define RB_ENABLE_CAD 0x89abcdef
59 #define RB_DISABLE_CAD 0
60 #define RB_POWER_OFF 0x4321fedc
61 #define RB_AUTOBOOT 0x01234567
62 #if defined(__GLIBC__)
63 #include <sys/reboot.h>
64 #define init_reboot(magic) reboot(magic)
66 #define init_reboot(magic) reboot(0xfee1dead, 672274793, magic)
71 #define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
75 #if defined BB_FEATURE_INIT_COREDUMPS
77 * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called
78 * before processes are spawned to set core file size as unlimited.
79 * This is for debugging only. Don't use this is production, unless
80 * you want core dumps lying about....
82 #define CORE_ENABLE_FLAG_FILE "/.init_enable_core"
83 #include <sys/resource.h>
87 #ifndef KERNEL_VERSION
88 #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
91 #if defined(__GLIBC__)
92 #include <sys/kdaemon.h>
94 static _syscall2(int, bdflush, int, func, int, data);
95 #endif /* __GLIBC__ */
98 #define VT_PRIMARY "/dev/tty1" /* Primary virtual console */
99 #define VT_SECONDARY "/dev/tty2" /* Virtual console */
100 #define VT_LOG "/dev/tty3" /* Virtual console */
101 #define SERIAL_CON0 "/dev/ttyS0" /* Primary serial console */
102 #define SERIAL_CON1 "/dev/ttyS1" /* Serial console */
103 #define SHELL "/bin/sh" /* Default shell */
104 #define INITTAB "/etc/inittab" /* inittab file location */
106 #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */
112 /* Allowed init action types */
122 /* A mapping between "inittab" action name strings and action type codes. */
123 typedef struct initActionType {
125 initActionEnum action;
128 static const struct initActionType actions[] = {
129 {"sysinit", SYSINIT},
130 {"respawn", RESPAWN},
131 {"askfirst", ASKFIRST},
134 {"ctrlaltdel", CTRLALTDEL},
138 /* Set up a linked list of initActions, to be read from inittab */
139 typedef struct initActionTag initAction;
140 struct initActionTag {
145 initActionEnum action;
147 initAction *initActionList = NULL;
150 static char *secondConsole = VT_SECONDARY;
151 static char *log = VT_LOG;
152 static int kernelVersion = 0;
153 static char termType[32] = "TERM=linux";
154 static char console[32] = _PATH_CONSOLE;
156 static void delete_initAction(initAction * action);
159 /* Print a message to the specified device.
160 * Device may be bitwise-or'd from LOG | CONSOLE */
161 static void message(int device, char *fmt, ...)
162 __attribute__ ((format (printf, 2, 3)));
163 static void message(int device, char *fmt, ...)
170 /* Log the message to syslogd */
174 va_start(arguments, fmt);
175 vsnprintf(msg, sizeof(msg), fmt, arguments);
177 openlog("init", 0, LOG_USER);
178 syslog(LOG_USER|LOG_INFO, msg);
182 static int log_fd = -1;
184 /* Take full control of the log tty, and never close it.
185 * It's mine, all mine! Muhahahaha! */
188 /* don't even try to log, because there is no such console */
190 /* log to main console instead */
192 } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) {
194 fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log);
200 if ((device & LOG) && (log_fd >= 0)) {
201 va_start(arguments, fmt);
202 vdprintf(log_fd, fmt, arguments);
207 if (device & CONSOLE) {
208 /* Always send console messages to /dev/console so people will see them. */
211 device_open(_PATH_CONSOLE,
212 O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
213 va_start(arguments, fmt);
214 vdprintf(fd, fmt, arguments);
218 fprintf(stderr, "Bummer, can't print: ");
219 va_start(arguments, fmt);
220 vfprintf(stderr, fmt, arguments);
227 #define CTRLCHAR(ch) ((ch)&0x1f)
229 /* Set terminal settings to reasonable defaults */
230 void set_term(int fd)
236 /* set control chars */
237 tty.c_cc[VINTR] = CTRLCHAR('C'); /* Ctrl-C */
238 tty.c_cc[VQUIT] = CTRLCHAR('\\'); /* Ctrl-\ */
239 tty.c_cc[VERASE] = CTRLCHAR('?'); /* Ctrl-? */
240 tty.c_cc[VKILL] = CTRLCHAR('U'); /* Ctrl-U */
241 tty.c_cc[VEOF] = CTRLCHAR('D'); /* Ctrl-D */
242 tty.c_cc[VSTOP] = CTRLCHAR('S'); /* Ctrl-S */
243 tty.c_cc[VSTART] = CTRLCHAR('Q'); /* Ctrl-Q */
244 tty.c_cc[VSUSP] = CTRLCHAR('Z'); /* Ctrl-Z */
246 /* use line dicipline 0 */
249 /* Make it be sane */
250 tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
251 tty.c_cflag |= HUPCL|CLOCAL;
254 tty.c_iflag = ICRNL | IXON | IXOFF;
257 tty.c_oflag = OPOST | ONLCR;
261 ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN;
263 tcsetattr(fd, TCSANOW, &tty);
266 /* How much memory does this machine have? */
267 static int check_free_memory()
271 /* Pre initialize mem_unit in case this kernel is something prior to
272 * the linux 2.4 kernel (which will actually fill in mem_unit... */
274 if (sysinfo(&info) != 0) {
275 printf("Error checking free memory: %s\n", strerror(errno));
278 if (info.mem_unit==0) {
279 /* Looks like we have a kernel prior to Linux 2.4.x */
281 info.totalram/=info.mem_unit;
282 info.totalswap/=info.mem_unit;
284 /* Bah. Linux 2.4.x completely changed sysinfo. This can in theory
285 overflow a 32 bit unsigned long, but who puts more then 4GiB ram+swap
286 on an embedded system? */
288 info.totalram*=info.mem_unit;
289 info.totalswap*=info.mem_unit;
292 return(info.totalram+info.totalswap);
295 static void console_init()
298 int tried_devcons = 0;
299 int tried_vtprimary = 0;
301 struct serial_struct sr;
304 if ((s = getenv("TERM")) != NULL) {
305 snprintf(termType, sizeof(termType) - 1, "TERM=%s", s);
308 if ((s = getenv("CONSOLE")) != NULL) {
309 snprintf(console, sizeof(console) - 1, "%s", s);
312 /* sparc kernel supports console=tty[ab] parameter which is also
313 * passed to init, so catch it here */
314 else if ((s = getenv("console")) != NULL) {
315 /* remap tty[ab] to /dev/ttyS[01] */
316 if (strcmp(s, "ttya") == 0)
317 snprintf(console, sizeof(console) - 1, "%s", SERIAL_CON0);
318 else if (strcmp(s, "ttyb") == 0)
319 snprintf(console, sizeof(console) - 1, "%s", SERIAL_CON1);
323 /* 2.2 kernels: identify the real console backend and try to use it */
324 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
325 /* this is a serial console */
326 snprintf(console, sizeof(console) - 1, "/dev/ttyS%d", sr.line);
327 } else if (ioctl(0, VT_GETSTATE, &vt) == 0) {
328 /* this is linux virtual tty */
329 snprintf(console, sizeof(console) - 1, "/dev/tty%d",
332 snprintf(console, sizeof(console) - 1, "%s", _PATH_CONSOLE);
337 while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
338 /* Can't open selected console -- try /dev/console */
339 if (!tried_devcons) {
341 snprintf(console, sizeof(console) - 1, "%s", _PATH_CONSOLE);
344 /* Can't open selected console -- try vt1 */
345 if (!tried_vtprimary) {
347 snprintf(console, sizeof(console) - 1, "%s", VT_PRIMARY);
353 /* Perhaps we should panic here? */
354 snprintf(console, sizeof(console) - 1, "/dev/null");
356 /* check for serial console and disable logging to tty3 & running a
358 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
360 secondConsole = NULL;
361 /* Force the TERM setting to vt102 for serial console --
362 * iff TERM is set to linux (the default) */
363 if (strcmp( termType, "TERM=linux" ) == 0)
364 snprintf(termType, sizeof(termType) - 1, "TERM=vt102");
365 message(LOG | CONSOLE,
366 "serial console detected. Disabling virtual terminals.\r\n");
370 message(LOG, "console=%s\n", console);
373 static pid_t run(char *command, char *terminal, int get_enter)
380 static const char press_enter[] =
382 "\nPlease press Enter to activate this console. ";
383 char *environment[] = {
385 "PATH=/usr/bin:/bin:/usr/sbin:/sbin",
393 if ((pid = fork()) == 0) {
400 /* Reset signal handlers set for parent process */
401 signal(SIGUSR1, SIG_DFL);
402 signal(SIGUSR2, SIG_DFL);
403 signal(SIGINT, SIG_DFL);
404 signal(SIGTERM, SIG_DFL);
405 signal(SIGHUP, SIG_DFL);
407 if ((fd = device_open(terminal, O_RDWR)) < 0) {
408 message(LOG | CONSOLE, "Bummer, can't open %s\r\n", terminal);
414 ioctl(0, TIOCSCTTY, 0);
415 tcsetpgrp(0, getpgrp());
418 if (get_enter == TRUE) {
420 * Save memory by not exec-ing anything large (like a shell)
421 * before the user wants it. This is critical if swap is not
422 * enabled and the system has low memory. Generally this will
423 * be run on the second virtual console, and the first will
424 * be allowed to start a shell or whatever an init script
429 pid_t shell_pgid = getpid();
430 message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
431 command, shell_pgid, terminal);
433 write(fileno(stdout), press_enter, sizeof(press_enter) - 1);
434 read(fileno(stdin), &c, 1);
438 /* Log the process name and args */
439 message(LOG, "Starting pid %d, console %s: '%s'\r\n",
440 shell_pgid, terminal, command);
443 /* See if any special /bin/sh requiring characters are present */
444 if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
447 strcpy(buf, "exec ");
448 strncat(buf, command, sizeof(buf) - strlen(buf) - 1);
452 /* Convert command (char*) into cmd (char**, one word per string) */
453 for (tmpCmd = command, i = 0;
454 (tmpCmd = strsep(&command, " \t")) != NULL;) {
455 if (*tmpCmd != '\0') {
464 #if defined BB_FEATURE_INIT_COREDUMPS
467 if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) {
469 limit.rlim_cur = RLIM_INFINITY;
470 limit.rlim_max = RLIM_INFINITY;
471 setrlimit(RLIMIT_CORE, &limit);
476 /* Now run it. The new program will take over this PID,
477 * so nothing further in init.c should be run. */
478 execve(cmd[0], cmd, environment);
480 /* We're still here? Some error happened. */
481 message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmd[0],
488 static int waitfor(char *command, char *terminal, int get_enter)
491 int pid = run(command, terminal, get_enter);
494 wpid = wait(&status);
495 if (wpid > 0 && wpid != pid) {
504 /* Make sure there is enough memory to do something useful. *
505 * Calls "swapon -a" if needed so be sure /etc/fstab is present... */
506 static void check_memory()
510 if (check_free_memory() > 1000)
513 if (stat("/etc/fstab", &statBuf) == 0) {
514 /* swapon -a requires /proc typically */
515 waitfor("mount proc /proc -t proc", console, FALSE);
516 /* Try to turn on swap */
517 waitfor("swapon -a", console, FALSE);
518 if (check_free_memory() < 1000)
526 "Sorry, your computer does not have enough memory.\r\n");
531 /* Run all commands to be run right before halt/reboot */
532 static void run_lastAction(void)
535 for (a = initActionList; a; a = a->nextPtr) {
536 if (a->action == CTRLALTDEL) {
537 waitfor(a->process, a->console, FALSE);
538 delete_initAction(a);
545 static void shutdown_system(void)
548 /* first disable our SIGHUP signal */
549 signal(SIGHUP, SIG_DFL);
551 /* Allow Ctrl-Alt-Del to reboot system. */
552 init_reboot(RB_ENABLE_CAD);
554 message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n");
557 /* Send signals to every process _except_ pid 1 */
558 message(CONSOLE|LOG, "Sending SIGTERM to all processes.\r\n");
563 message(CONSOLE|LOG, "Sending SIGKILL to all processes.\r\n");
567 /* run everything to be run at "ctrlaltdel" */
571 if (kernelVersion > 0 && kernelVersion <= 2 * 65536 + 2 * 256 + 11) {
572 /* bdflush, kupdate not needed for kernels >2.2.11 */
578 static void halt_signal(int sig)
582 "The system is halted. Press %s or turn off power\r\n",
583 (secondConsole == NULL) /* serial console */
584 ? "Reset" : "CTRL-ALT-DEL");
587 /* allow time for last message to reach serial console */
590 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
592 init_reboot(RB_POWER_OFF);
595 init_reboot(RB_HALT_SYSTEM);
599 static void reboot_signal(int sig)
602 message(CONSOLE|LOG, "Please stand by while rebooting the system.\r\n");
605 /* allow time for last message to reach serial console */
608 init_reboot(RB_AUTOBOOT);
612 #if defined BB_FEATURE_INIT_CHROOT
614 #if ! defined BB_FEATURE_USE_PROCFS
615 #error Sorry, I depend on the /proc filesystem right now.
618 static void check_chroot(int sig)
620 char *argv_init[2] = { "init", NULL, };
621 char *envp_init[3] = { "HOME=/", "TERM=linux", NULL, };
622 char rootpath[256], *tc;
625 if ((fd = open("/proc/sys/kernel/init-chroot", O_RDONLY)) == -1) {
627 "SIGHUP recived, but could not open proc file\r\n");
631 if (read(fd, rootpath, sizeof(rootpath)) == -1) {
633 "SIGHUP recived, but could not read proc file\r\n");
639 if (rootpath[0] == '\0') {
641 "SIGHUP recived, but new root is not valid: %s\r\n",
647 tc = strrchr(rootpath, '\n');
650 /* Ok, making it this far means we commit */
651 message(CONSOLE, "Please stand by, changing root to `%s'.\r\n",
654 /* kill all other programs first */
655 message(CONSOLE, "Sending SIGTERM to all processes.\r\n");
660 message(CONSOLE, "Sending SIGKILL to all processes.\r\n");
665 /* ok, we don't need /proc anymore. we also assume that the signaling
666 * process left the rest of the filesystems alone for us */
669 /* Ok, now we chroot. Hopefully we only have two things mounted, the
670 * new chroot'd mount point, and the old "/" mount. s,
671 * we go ahead and unmount the old "/". This should trigger the kernel
672 * to set things up the Right Way(tm). */
674 if (!chroot(rootpath))
677 /* If the chroot fails, we are already too far to turn back, so we
678 * continue and hope that executing init below will revive the system */
680 /* close all of our descriptors and open new ones */
684 open("/dev/console", O_RDWR, 0);
688 message(CONSOLE, "Executing real init...\r\n");
689 /* execute init in the (hopefully) new root */
690 execve("/sbin/init", argv_init, envp_init);
693 "ERROR: Could not exec new init. Press %s to reboot.\r\n",
694 (secondConsole == NULL) /* serial console */
695 ? "Reset" : "CTRL-ALT-DEL");
698 #endif /* BB_FEATURE_INIT_CHROOT */
700 #endif /* ! DEBUG_INIT */
702 void new_initAction(initActionEnum action, char *process, char *cons)
704 initAction *newAction;
709 /* If BusyBox detects that a serial console is in use,
710 * then entries not refering to the console or null devices will _not_ be run.
711 * The exception to this rule is the null device.
713 if (secondConsole == NULL && strcmp(cons, console)
714 && strcmp(cons, "/dev/null"))
717 newAction = calloc((size_t) (1), sizeof(initAction));
719 message(LOG | CONSOLE, "Memory allocation failure\n");
723 newAction->nextPtr = initActionList;
724 initActionList = newAction;
725 strncpy(newAction->process, process, 255);
726 newAction->action = action;
727 strncpy(newAction->console, cons, 255);
729 // message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n",
730 // newAction->process, newAction->action, newAction->console);
733 static void delete_initAction(initAction * action)
735 initAction *a, *b = NULL;
737 for (a = initActionList; a; b = a, a = a->nextPtr) {
740 initActionList = a->nextPtr;
742 b->nextPtr = a->nextPtr;
750 /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined,
751 * then parse_inittab() simply adds in some default
752 * actions(i.e runs INIT_SCRIPT and then starts a pair
753 * of "askfirst" shells). If BB_FEATURE_USE_INITTAB
754 * _is_ defined, but /etc/inittab is missing, this
755 * results in the same set of default behaviors.
757 void parse_inittab(void)
759 #ifdef BB_FEATURE_USE_INITTAB
761 char buf[256], lineAsRead[256], tmpConsole[256];
762 char *id, *runlev, *action, *process, *eol;
763 const struct initActionType *a = actions;
767 file = fopen(INITTAB, "r");
769 /* No inittab file -- set up some default behavior */
771 /* Swapoff on halt/reboot */
772 new_initAction(CTRLALTDEL, "/sbin/swapoff -a > /dev/null 2>&1", console);
773 /* Umount all filesystems on halt/reboot */
774 new_initAction(CTRLALTDEL, "/bin/umount -a -r > /dev/null 2>&1", console);
775 /* Askfirst shell on tty1 */
776 new_initAction(ASKFIRST, SHELL, console);
777 /* Askfirst shell on tty2 */
778 if (secondConsole != NULL)
779 new_initAction(ASKFIRST, SHELL, secondConsole);
781 new_initAction(SYSINIT, INIT_SCRIPT, console);
784 #ifdef BB_FEATURE_USE_INITTAB
787 while (fgets(buf, 255, file) != NULL) {
789 /* Skip leading spaces */
790 for (id = buf; *id == ' ' || *id == '\t'; id++);
792 /* Skip the line if it's a comment */
793 if (*id == '#' || *id == '\n')
796 /* Trim the trailing \n */
797 eol = strrchr(id, '\n');
801 /* Keep a copy around for posterity's sake (and error msgs) */
802 strcpy(lineAsRead, buf);
804 /* Separate the ID field from the runlevels */
805 runlev = strchr(id, ':');
806 if (runlev == NULL || *(runlev + 1) == '\0') {
807 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
814 /* Separate the runlevels from the action */
815 action = strchr(runlev, ':');
816 if (action == NULL || *(action + 1) == '\0') {
817 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
824 /* Separate the action from the process */
825 process = strchr(action, ':');
826 if (process == NULL || *(process + 1) == '\0') {
827 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
834 /* Ok, now process it */
836 while (a->name != 0) {
837 if (strcmp(a->name, action) == 0) {
841 strcpy(tmpConsole, "/dev/");
842 strncat(tmpConsole, id, 200);
843 if (stat(tmpConsole, &statBuf) != 0) {
844 message(LOG | CONSOLE,
845 "device '%s' does not exist. Did you read the directions?\n",
851 new_initAction(a->action, process, id);
859 /* Choke on an unknown action */
860 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
864 #endif /* BB_FEATURE_USE_INITTAB */
869 extern int init_main(int argc, char **argv)
876 /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
878 #ifdef BB_FEATURE_LINUXRC
879 && strstr(argv[0], "linuxrc") == NULL
883 usage("init\n\nInit is the parent of all processes.\n\n"
884 "This version of init is designed to be run only "
887 /* Set up sig handlers -- be sure to
888 * clear all of these in run() */
889 signal(SIGUSR1, halt_signal);
890 signal(SIGUSR2, reboot_signal);
891 signal(SIGINT, reboot_signal);
892 signal(SIGTERM, reboot_signal);
893 #if defined BB_FEATURE_INIT_CHROOT
894 signal(SIGHUP, check_chroot);
897 /* Turn off rebooting via CTL-ALT-DEL -- we get a
898 * SIGINT on CAD so we can shut things down gracefully... */
899 init_reboot(RB_DISABLE_CAD);
902 /* Figure out what kernel this is running */
903 kernelVersion = get_kernel_revision();
905 /* Figure out where the default console should be */
908 /* Close whatever files are open, and reset the console. */
916 /* Make sure PATH is set to something sane */
917 putenv(_PATH_STDPATH);
922 #if ! defined BB_FEATURE_EXTRA_QUIET
926 "init started: BusyBox v%s (%s) multi-call binary\r\n",
930 #if ! defined BB_FEATURE_EXTRA_QUIET
934 "init(%d) started: BusyBox v%s (%s) multi-call binary\r\n",
935 getpid(), BB_VER, BB_BT);
939 /* Make sure there is enough memory to do something useful. */
942 /* Check if we are supposed to be in single user mode */
943 if (argc > 1 && (!strcmp(argv[1], "single") ||
944 !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
945 /* Ask first then start a shell on tty2 */
946 if (secondConsole != NULL)
947 new_initAction(ASKFIRST, SHELL, secondConsole);
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 /* Fix up argv[0] to be certain we claim to be init */
961 strncpy(argv[0], "init", strlen(argv[0])+1);
963 strncpy(argv[1], "\0", strlen(argv[1])+1);
965 /* Now run everything that needs to be run */
967 /* First run the sysinit command */
968 for (a = initActionList; a; a = a->nextPtr) {
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 = a->nextPtr) {
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 = a->nextPtr) {
985 if (a->action == ONCE) {
986 run(a->process, a->console, FALSE);
987 /* Now remove the "once" entry from the list */
988 delete_initAction(a);
991 /* If there is nothing else to do, stop */
992 if (initActionList == NULL) {
993 message(LOG | CONSOLE,
994 "No more tasks for init -- sleeping forever.\n");
999 /* Now run the looping stuff for the rest of forever */
1001 for (a = initActionList; a; a = a->nextPtr) {
1002 /* Only run stuff with pid==0. If they have
1003 * a pid, that means they are still running */
1005 switch (a->action) {
1007 /* run the respawn stuff */
1008 a->pid = run(a->process, a->console, FALSE);
1011 /* run the askfirst stuff */
1012 a->pid = run(a->process, a->console, TRUE);
1014 /* silence the compiler's incessant whining */
1020 /* Wait for a child process to exit */
1021 wpid = wait(&status);
1023 /* Find out who died and clean up their corpse */
1024 for (a = initActionList; a; a = a->nextPtr) {
1025 if (a->pid == wpid) {
1028 "Process '%s' (pid %d) exited. Scheduling it for restart.\n",
1039 c-file-style: "linux"