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 tcsetpgrp(0, getpgrp());
417 if (get_enter == TRUE) {
419 * Save memory by not exec-ing anything large (like a shell)
420 * before the user wants it. This is critical if swap is not
421 * enabled and the system has low memory. Generally this will
422 * be run on the second virtual console, and the first will
423 * be allowed to start a shell or whatever an init script
428 pid_t shell_pgid = getpid();
429 message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
430 command, shell_pgid, terminal);
432 write(fileno(stdout), press_enter, sizeof(press_enter) - 1);
433 read(fileno(stdin), &c, 1);
437 /* Log the process name and args */
438 message(LOG, "Starting pid %d, console %s: '%s'\r\n",
439 shell_pgid, terminal, command);
442 /* See if any special /bin/sh requiring characters are present */
443 if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
446 strcpy(buf, "exec ");
447 strncat(buf, command, sizeof(buf) - strlen(buf) - 1);
451 /* Convert command (char*) into cmd (char**, one word per string) */
452 for (tmpCmd = command, i = 0;
453 (tmpCmd = strsep(&command, " \t")) != NULL;) {
454 if (*tmpCmd != '\0') {
463 #if defined BB_FEATURE_INIT_COREDUMPS
466 if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) {
468 limit.rlim_cur = RLIM_INFINITY;
469 limit.rlim_max = RLIM_INFINITY;
470 setrlimit(RLIMIT_CORE, &limit);
475 /* Now run it. The new program will take over this PID,
476 * so nothing further in init.c should be run. */
477 execve(cmd[0], cmd, environment);
479 /* We're still here? Some error happened. */
480 message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmd[0],
487 static int waitfor(char *command, char *terminal, int get_enter)
490 int pid = run(command, terminal, get_enter);
493 wpid = wait(&status);
494 if (wpid > 0 && wpid != pid) {
503 /* Make sure there is enough memory to do something useful. *
504 * Calls "swapon -a" if needed so be sure /etc/fstab is present... */
505 static void check_memory()
509 if (check_free_memory() > 1000)
512 if (stat("/etc/fstab", &statBuf) == 0) {
513 /* swapon -a requires /proc typically */
514 waitfor("mount proc /proc -t proc", console, FALSE);
515 /* Try to turn on swap */
516 waitfor("swapon -a", console, FALSE);
517 if (check_free_memory() < 1000)
525 "Sorry, your computer does not have enough memory.\r\n");
530 /* Run all commands to be run right before halt/reboot */
531 static void run_lastAction(void)
534 for (a = initActionList; a; a = a->nextPtr) {
535 if (a->action == CTRLALTDEL) {
536 waitfor(a->process, a->console, FALSE);
537 delete_initAction(a);
544 static void shutdown_system(void)
547 /* first disable our SIGHUP signal */
548 signal(SIGHUP, SIG_DFL);
550 /* Allow Ctrl-Alt-Del to reboot system. */
551 init_reboot(RB_ENABLE_CAD);
553 message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n");
556 /* Send signals to every process _except_ pid 1 */
557 message(CONSOLE|LOG, "Sending SIGTERM to all processes.\r\n");
562 message(CONSOLE|LOG, "Sending SIGKILL to all processes.\r\n");
566 /* run everything to be run at "ctrlaltdel" */
570 if (kernelVersion > 0 && kernelVersion <= 2 * 65536 + 2 * 256 + 11) {
571 /* bdflush, kupdate not needed for kernels >2.2.11 */
577 static void halt_signal(int sig)
581 "The system is halted. Press %s or turn off power\r\n",
582 (secondConsole == NULL) /* serial console */
583 ? "Reset" : "CTRL-ALT-DEL");
586 /* allow time for last message to reach serial console */
589 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
591 init_reboot(RB_POWER_OFF);
594 init_reboot(RB_HALT_SYSTEM);
598 static void reboot_signal(int sig)
601 message(CONSOLE|LOG, "Please stand by while rebooting the system.\r\n");
604 /* allow time for last message to reach serial console */
607 init_reboot(RB_AUTOBOOT);
611 #if defined BB_FEATURE_INIT_CHROOT
613 #if ! defined BB_FEATURE_USE_PROCFS
614 #error Sorry, I depend on the /proc filesystem right now.
617 static void check_chroot(int sig)
619 char *argv_init[2] = { "init", NULL, };
620 char *envp_init[3] = { "HOME=/", "TERM=linux", NULL, };
621 char rootpath[256], *tc;
624 if ((fd = open("/proc/sys/kernel/init-chroot", O_RDONLY)) == -1) {
626 "SIGHUP recived, but could not open proc file\r\n");
630 if (read(fd, rootpath, sizeof(rootpath)) == -1) {
632 "SIGHUP recived, but could not read proc file\r\n");
638 if (rootpath[0] == '\0') {
640 "SIGHUP recived, but new root is not valid: %s\r\n",
646 tc = strrchr(rootpath, '\n');
649 /* Ok, making it this far means we commit */
650 message(CONSOLE, "Please stand by, changing root to `%s'.\r\n",
653 /* kill all other programs first */
654 message(CONSOLE, "Sending SIGTERM to all processes.\r\n");
659 message(CONSOLE, "Sending SIGKILL to all processes.\r\n");
664 /* ok, we don't need /proc anymore. we also assume that the signaling
665 * process left the rest of the filesystems alone for us */
668 /* Ok, now we chroot. Hopefully we only have two things mounted, the
669 * new chroot'd mount point, and the old "/" mount. s,
670 * we go ahead and unmount the old "/". This should trigger the kernel
671 * to set things up the Right Way(tm). */
673 if (!chroot(rootpath))
676 /* If the chroot fails, we are already too far to turn back, so we
677 * continue and hope that executing init below will revive the system */
679 /* close all of our descriptors and open new ones */
683 open("/dev/console", O_RDWR, 0);
687 message(CONSOLE, "Executing real init...\r\n");
688 /* execute init in the (hopefully) new root */
689 execve("/sbin/init", argv_init, envp_init);
692 "ERROR: Could not exec new init. Press %s to reboot.\r\n",
693 (secondConsole == NULL) /* serial console */
694 ? "Reset" : "CTRL-ALT-DEL");
697 #endif /* BB_FEATURE_INIT_CHROOT */
699 #endif /* ! DEBUG_INIT */
701 void new_initAction(initActionEnum action, char *process, char *cons)
703 initAction *newAction;
708 /* If BusyBox detects that a serial console is in use,
709 * then entries not refering to the console or null devices will _not_ be run.
710 * The exception to this rule is the null device.
712 if (secondConsole == NULL && strcmp(cons, console)
713 && strcmp(cons, "/dev/null"))
716 newAction = calloc((size_t) (1), sizeof(initAction));
718 message(LOG | CONSOLE, "Memory allocation failure\n");
722 newAction->nextPtr = initActionList;
723 initActionList = newAction;
724 strncpy(newAction->process, process, 255);
725 newAction->action = action;
726 strncpy(newAction->console, cons, 255);
728 // message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n",
729 // newAction->process, newAction->action, newAction->console);
732 static void delete_initAction(initAction * action)
734 initAction *a, *b = NULL;
736 for (a = initActionList; a; b = a, a = a->nextPtr) {
739 initActionList = a->nextPtr;
741 b->nextPtr = a->nextPtr;
749 /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined,
750 * then parse_inittab() simply adds in some default
751 * actions(i.e runs INIT_SCRIPT and then starts a pair
752 * of "askfirst" shells). If BB_FEATURE_USE_INITTAB
753 * _is_ defined, but /etc/inittab is missing, this
754 * results in the same set of default behaviors.
756 void parse_inittab(void)
758 #ifdef BB_FEATURE_USE_INITTAB
760 char buf[256], lineAsRead[256], tmpConsole[256];
761 char *id, *runlev, *action, *process, *eol;
762 const struct initActionType *a = actions;
766 file = fopen(INITTAB, "r");
768 /* No inittab file -- set up some default behavior */
770 /* Swapoff on halt/reboot */
771 new_initAction(CTRLALTDEL, "/sbin/swapoff -a > /dev/null 2>&1", console);
772 /* Umount all filesystems on halt/reboot */
773 new_initAction(CTRLALTDEL, "/bin/umount -a -r > /dev/null 2>&1", console);
774 /* Askfirst shell on tty1 */
775 new_initAction(ASKFIRST, SHELL, console);
776 /* Askfirst shell on tty2 */
777 if (secondConsole != NULL)
778 new_initAction(ASKFIRST, SHELL, secondConsole);
780 new_initAction(SYSINIT, INIT_SCRIPT, console);
783 #ifdef BB_FEATURE_USE_INITTAB
786 while (fgets(buf, 255, file) != NULL) {
788 /* Skip leading spaces */
789 for (id = buf; *id == ' ' || *id == '\t'; id++);
791 /* Skip the line if it's a comment */
792 if (*id == '#' || *id == '\n')
795 /* Trim the trailing \n */
796 eol = strrchr(id, '\n');
800 /* Keep a copy around for posterity's sake (and error msgs) */
801 strcpy(lineAsRead, buf);
803 /* Separate the ID field from the runlevels */
804 runlev = strchr(id, ':');
805 if (runlev == NULL || *(runlev + 1) == '\0') {
806 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
813 /* Separate the runlevels from the action */
814 action = strchr(runlev, ':');
815 if (action == NULL || *(action + 1) == '\0') {
816 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
823 /* Separate the action from the process */
824 process = strchr(action, ':');
825 if (process == NULL || *(process + 1) == '\0') {
826 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
833 /* Ok, now process it */
835 while (a->name != 0) {
836 if (strcmp(a->name, action) == 0) {
840 strcpy(tmpConsole, "/dev/");
841 strncat(tmpConsole, id, 200);
842 if (stat(tmpConsole, &statBuf) != 0) {
843 message(LOG | CONSOLE,
844 "device '%s' does not exist. Did you read the directions?\n",
850 new_initAction(a->action, process, id);
858 /* Choke on an unknown action */
859 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
863 #endif /* BB_FEATURE_USE_INITTAB */
868 extern int init_main(int argc, char **argv)
875 /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
877 #ifdef BB_FEATURE_LINUXRC
878 && strstr(argv[0], "linuxrc") == NULL
882 usage("init\n\nInit is the parent of all processes.\n\n"
883 "This version of init is designed to be run only "
886 /* Set up sig handlers -- be sure to
887 * clear all of these in run() */
888 signal(SIGUSR1, halt_signal);
889 signal(SIGUSR2, reboot_signal);
890 signal(SIGINT, reboot_signal);
891 signal(SIGTERM, reboot_signal);
892 #if defined BB_FEATURE_INIT_CHROOT
893 signal(SIGHUP, check_chroot);
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_STDPATH);
921 #if ! defined BB_FEATURE_EXTRA_QUIET
925 "init started: BusyBox v%s (%s) multi-call binary\r\n",
929 #if ! defined BB_FEATURE_EXTRA_QUIET
933 "init(%d) started: BusyBox v%s (%s) multi-call binary\r\n",
934 getpid(), BB_VER, BB_BT);
938 /* Make sure there is enough memory to do something useful. */
941 /* Check if we are supposed to be in single user mode */
942 if (argc > 1 && (!strcmp(argv[1], "single") ||
943 !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
944 /* Ask first then start a shell on tty2 */
945 if (secondConsole != NULL)
946 new_initAction(ASKFIRST, SHELL, secondConsole);
947 /* Start a shell on tty1 */
948 new_initAction(RESPAWN, SHELL, console);
950 /* Not in single user mode -- see what inittab says */
952 /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined,
953 * then parse_inittab() simply adds in some default
954 * actions(i.e runs INIT_SCRIPT and then starts a pair
955 * of "askfirst" shells */
959 /* Fix up argv[0] to be certain we claim to be init */
960 strncpy(argv[0], "init", strlen(argv[0])+1);
962 strncpy(argv[1], "\0", strlen(argv[1])+1);
964 /* Now run everything that needs to be run */
966 /* First run the sysinit command */
967 for (a = initActionList; a; a = a->nextPtr) {
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 = a->nextPtr) {
976 if (a->action == WAIT) {
977 waitfor(a->process, a->console, FALSE);
978 /* Now remove the "wait" entry from the list */
979 delete_initAction(a);
982 /* Next run anything to be run only once */
983 for (a = initActionList; a; a = a->nextPtr) {
984 if (a->action == ONCE) {
985 run(a->process, a->console, FALSE);
986 /* Now remove the "once" entry from the list */
987 delete_initAction(a);
990 /* If there is nothing else to do, stop */
991 if (initActionList == NULL) {
992 message(LOG | CONSOLE,
993 "No more tasks for init -- sleeping forever.\n");
998 /* Now run the looping stuff for the rest of forever */
1000 for (a = initActionList; a; a = a->nextPtr) {
1001 /* Only run stuff with pid==0. If they have
1002 * a pid, that means they are still running */
1004 switch (a->action) {
1006 /* run the respawn stuff */
1007 a->pid = run(a->process, a->console, FALSE);
1010 /* run the askfirst stuff */
1011 a->pid = run(a->process, a->console, TRUE);
1013 /* silence the compiler's incessant whining */
1019 /* Wait for a child process to exit */
1020 wpid = wait(&status);
1022 /* Find out who died and clean up their corpse */
1023 for (a = initActionList; a; a = a->nextPtr) {
1024 if (a->pid == wpid) {
1027 "Process '%s' (pid %d) exited. Scheduling it for restart.\n",
1038 c-file-style: "linux"