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 # include <sys/syslog.h>
49 #define bb_need_full_version
50 #define BB_DECLARE_EXTERN
53 /* From <linux/vt.h> */
55 unsigned short v_active; /* active vt */
56 unsigned short v_signal; /* signal to send */
57 unsigned short v_state; /* vt bitmask */
59 #define VT_GETSTATE 0x5603 /* get global vt state info */
61 /* From <linux/serial.h> */
62 struct serial_struct {
71 unsigned short close_delay;
72 char reserved_char[2];
74 unsigned short closing_wait; /* time to wait before closing */
75 unsigned short closing_wait2; /* no longer used... */
81 #ifndef RB_HALT_SYSTEM
82 #define RB_HALT_SYSTEM 0xcdef0123
83 #define RB_ENABLE_CAD 0x89abcdef
84 #define RB_DISABLE_CAD 0
85 #define RB_POWER_OFF 0x4321fedc
86 #define RB_AUTOBOOT 0x01234567
87 #if defined(__GLIBC__)
88 #include <sys/reboot.h>
89 #define init_reboot(magic) reboot(magic)
91 #define init_reboot(magic) reboot(0xfee1dead, 672274793, magic)
96 #define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
100 #if defined BB_FEATURE_INIT_COREDUMPS
102 * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called
103 * before processes are spawned to set core file size as unlimited.
104 * This is for debugging only. Don't use this is production, unless
105 * you want core dumps lying about....
107 #define CORE_ENABLE_FLAG_FILE "/.init_enable_core"
108 #include <sys/resource.h>
109 #include <sys/time.h>
112 #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
114 #if defined(__GLIBC__)
115 #include <sys/kdaemon.h>
117 static _syscall2(int, bdflush, int, func, int, data);
118 #endif /* __GLIBC__ */
121 #define VT_PRIMARY "/dev/tty1" /* Primary virtual console */
122 #define VT_SECONDARY "/dev/tty2" /* Virtual console */
123 #define VT_LOG "/dev/tty3" /* Virtual console */
124 #define SERIAL_CON0 "/dev/ttyS0" /* Primary serial console */
125 #define SERIAL_CON1 "/dev/ttyS1" /* Serial console */
126 #define SHELL "/bin/sh" /* Default shell */
127 #define INITTAB "/etc/inittab" /* inittab file location */
129 #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */
135 /* Allowed init action types */
145 /* A mapping between "inittab" action name strings and action type codes. */
146 typedef struct initActionType {
148 initActionEnum action;
151 static const struct initActionType actions[] = {
152 {"sysinit", SYSINIT},
153 {"respawn", RESPAWN},
154 {"askfirst", ASKFIRST},
157 {"ctrlaltdel", CTRLALTDEL},
161 /* Set up a linked list of initActions, to be read from inittab */
162 typedef struct initActionTag initAction;
163 struct initActionTag {
168 initActionEnum action;
170 initAction *initActionList = NULL;
173 static char *secondConsole = VT_SECONDARY;
174 static char *log = VT_LOG;
175 static int kernelVersion = 0;
176 static char termType[32] = "TERM=linux";
177 static char console[32] = _PATH_CONSOLE;
179 static void delete_initAction(initAction * action);
182 /* Print a message to the specified device.
183 * Device may be bitwise-or'd from LOG | CONSOLE */
184 static void message(int device, char *fmt, ...)
185 __attribute__ ((format (printf, 2, 3)));
186 static void message(int device, char *fmt, ...)
193 /* Log the message to syslogd */
197 va_start(arguments, fmt);
198 vsnprintf(msg, sizeof(msg), fmt, arguments);
200 openlog("init", 0, LOG_USER);
201 syslog(LOG_USER|LOG_INFO, msg);
205 static int log_fd = -1;
207 /* Take full control of the log tty, and never close it.
208 * It's mine, all mine! Muhahahaha! */
211 /* don't even try to log, because there is no such console */
213 /* log to main console instead */
215 } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) {
217 fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log);
223 if ((device & LOG) && (log_fd >= 0)) {
224 va_start(arguments, fmt);
225 vdprintf(log_fd, fmt, arguments);
230 if (device & CONSOLE) {
231 /* Always send console messages to /dev/console so people will see them. */
234 device_open(_PATH_CONSOLE,
235 O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
236 va_start(arguments, fmt);
237 vdprintf(fd, fmt, arguments);
241 fprintf(stderr, "Bummer, can't print: ");
242 va_start(arguments, fmt);
243 vfprintf(stderr, fmt, arguments);
250 /* Set terminal settings to reasonable defaults */
251 void set_term(int fd)
257 /* set control chars */
258 tty.c_cc[VINTR] = 3; /* C-c */
259 tty.c_cc[VQUIT] = 28; /* C-\ */
260 tty.c_cc[VERASE] = 127; /* C-? */
261 tty.c_cc[VKILL] = 21; /* C-u */
262 tty.c_cc[VEOF] = 4; /* C-d */
263 tty.c_cc[VSTART] = 17; /* C-q */
264 tty.c_cc[VSTOP] = 19; /* C-s */
265 tty.c_cc[VSUSP] = 26; /* C-z */
267 /* use line dicipline 0 */
270 /* Make it be sane */
271 tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
272 tty.c_cflag |= HUPCL|CLOCAL;
275 tty.c_iflag = ICRNL | IXON | IXOFF;
278 tty.c_oflag = OPOST | ONLCR;
282 ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN;
284 tcsetattr(fd, TCSANOW, &tty);
287 /* How much memory does this machine have? */
288 static int check_free_memory()
292 /* Pre initialize mem_unit in case this kernel is something prior to
293 * the linux 2.4 kernel (which will actually fill in mem_unit... */
295 if (sysinfo(&info) != 0) {
296 printf("Error checking free memory: %s\n", strerror(errno));
299 if (info.mem_unit==0) {
300 /* Looks like we have a kernel prior to Linux 2.4.x */
302 info.totalram/=info.mem_unit;
303 info.totalswap/=info.mem_unit;
305 /* Bah. Linux 2.4.x completely changed sysinfo. This can in theory
306 overflow a 32 bit unsigned long, but who puts more then 4GiB ram+swap
307 on an embedded system? */
309 info.totalram*=info.mem_unit;
310 info.totalswap*=info.mem_unit;
313 return(info.totalram+info.totalswap);
316 static void console_init()
319 int tried_devcons = 0;
320 int tried_vtprimary = 0;
322 struct serial_struct sr;
325 if ((s = getenv("TERM")) != NULL) {
326 snprintf(termType, sizeof(termType) - 1, "TERM=%s", s);
329 if ((s = getenv("CONSOLE")) != NULL) {
330 snprintf(console, sizeof(console) - 1, "%s", s);
333 /* sparc kernel supports console=tty[ab] parameter which is also
334 * passed to init, so catch it here */
335 else if ((s = getenv("console")) != NULL) {
336 /* remap tty[ab] to /dev/ttyS[01] */
337 if (strcmp(s, "ttya") == 0)
338 snprintf(console, sizeof(console) - 1, "%s", SERIAL_CON0);
339 else if (strcmp(s, "ttyb") == 0)
340 snprintf(console, sizeof(console) - 1, "%s", SERIAL_CON1);
344 /* 2.2 kernels: identify the real console backend and try to use it */
345 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
346 /* this is a serial console */
347 snprintf(console, sizeof(console) - 1, "/dev/ttyS%d", sr.line);
348 } else if (ioctl(0, VT_GETSTATE, &vt) == 0) {
349 /* this is linux virtual tty */
350 snprintf(console, sizeof(console) - 1, "/dev/tty%d",
353 snprintf(console, sizeof(console) - 1, "%s", _PATH_CONSOLE);
358 while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
359 /* Can't open selected console -- try /dev/console */
360 if (!tried_devcons) {
362 snprintf(console, sizeof(console) - 1, "%s", _PATH_CONSOLE);
365 /* Can't open selected console -- try vt1 */
366 if (!tried_vtprimary) {
368 snprintf(console, sizeof(console) - 1, "%s", VT_PRIMARY);
374 /* Perhaps we should panic here? */
375 snprintf(console, sizeof(console) - 1, "/dev/null");
377 /* check for serial console and disable logging to tty3 & running a
379 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
381 secondConsole = NULL;
382 /* Force the TERM setting to vt102 for serial console --
383 * iff TERM is set to linux (the default) */
384 if (strcmp( termType, "TERM=linux" ) == 0)
385 snprintf(termType, sizeof(termType) - 1, "TERM=vt102");
386 message(LOG | CONSOLE,
387 "serial console detected. Disabling virtual terminals.\r\n");
391 message(LOG, "console=%s\n", console);
394 static pid_t run(char *command, char *terminal, int get_enter)
401 static const char press_enter[] =
403 "\nPlease press Enter to activate this console. ";
404 char *environment[] = {
406 "PATH=/usr/bin:/bin:/usr/sbin:/sbin",
414 if ((pid = fork()) == 0) {
421 /* Reset signal handlers set for parent process */
422 signal(SIGUSR1, SIG_DFL);
423 signal(SIGUSR2, SIG_DFL);
424 signal(SIGINT, SIG_DFL);
425 signal(SIGTERM, SIG_DFL);
426 signal(SIGHUP, SIG_DFL);
428 if ((fd = device_open(terminal, O_RDWR)) < 0) {
429 message(LOG | CONSOLE, "Bummer, can't open %s\r\n", terminal);
435 ioctl(0, TIOCSCTTY, 0);
436 tcsetpgrp(0, getpgrp());
439 if (get_enter == TRUE) {
441 * Save memory by not exec-ing anything large (like a shell)
442 * before the user wants it. This is critical if swap is not
443 * enabled and the system has low memory. Generally this will
444 * be run on the second virtual console, and the first will
445 * be allowed to start a shell or whatever an init script
450 pid_t shell_pgid = getpid();
451 message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
452 command, shell_pgid, terminal);
454 write(fileno(stdout), press_enter, sizeof(press_enter) - 1);
455 read(fileno(stdin), &c, 1);
459 /* Log the process name and args */
460 message(LOG, "Starting pid %d, console %s: '%s'\r\n",
461 shell_pgid, terminal, command);
464 /* See if any special /bin/sh requiring characters are present */
465 if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
468 strcpy(buf, "exec ");
469 strncat(buf, command, sizeof(buf) - strlen(buf) - 1);
473 /* Convert command (char*) into cmd (char**, one word per string) */
474 for (tmpCmd = command, i = 0;
475 (tmpCmd = strsep(&command, " \t")) != NULL;) {
476 if (*tmpCmd != '\0') {
485 #if defined BB_FEATURE_INIT_COREDUMPS
488 if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) {
490 limit.rlim_cur = RLIM_INFINITY;
491 limit.rlim_max = RLIM_INFINITY;
492 setrlimit(RLIMIT_CORE, &limit);
497 /* Now run it. The new program will take over this PID,
498 * so nothing further in init.c should be run. */
499 execve(cmd[0], cmd, environment);
501 /* We're still here? Some error happened. */
502 message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmd[0],
509 static int waitfor(char *command, char *terminal, int get_enter)
512 int pid = run(command, terminal, get_enter);
515 wpid = wait(&status);
516 if (wpid > 0 && wpid != pid) {
525 /* Make sure there is enough memory to do something useful. *
526 * Calls "swapon -a" if needed so be sure /etc/fstab is present... */
527 static void check_memory()
531 if (check_free_memory() > 1000)
534 if (stat("/etc/fstab", &statBuf) == 0) {
535 /* swapon -a requires /proc typically */
536 waitfor("mount proc /proc -t proc", console, FALSE);
537 /* Try to turn on swap */
538 waitfor("swapon -a", console, FALSE);
539 if (check_free_memory() < 1000)
547 "Sorry, your computer does not have enough memory.\r\n");
552 /* Run all commands to be run right before halt/reboot */
553 static void run_lastAction(void)
556 for (a = initActionList; a; a = a->nextPtr) {
557 if (a->action == CTRLALTDEL) {
558 waitfor(a->process, a->console, FALSE);
559 delete_initAction(a);
566 static void shutdown_system(void)
569 /* first disable our SIGHUP signal */
570 signal(SIGHUP, SIG_DFL);
572 /* Allow Ctrl-Alt-Del to reboot system. */
573 init_reboot(RB_ENABLE_CAD);
575 message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n");
578 /* Send signals to every process _except_ pid 1 */
579 message(CONSOLE|LOG, "Sending SIGTERM to all processes.\r\n");
584 message(CONSOLE|LOG, "Sending SIGKILL to all processes.\r\n");
588 /* run everything to be run at "ctrlaltdel" */
592 if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) {
593 /* bdflush, kupdate not needed for kernels >2.2.11 */
599 static void halt_signal(int sig)
603 "The system is halted. Press %s or turn off power\r\n",
604 (secondConsole == NULL) /* serial console */
605 ? "Reset" : "CTRL-ALT-DEL");
608 /* allow time for last message to reach serial console */
611 if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0))
612 init_reboot(RB_POWER_OFF);
614 init_reboot(RB_HALT_SYSTEM);
618 static void reboot_signal(int sig)
621 message(CONSOLE|LOG, "Please stand by while rebooting the system.\r\n");
624 /* allow time for last message to reach serial console */
627 init_reboot(RB_AUTOBOOT);
631 #if defined BB_FEATURE_INIT_CHROOT
633 #if ! defined BB_FEATURE_USE_PROCFS
634 #error Sorry, I depend on the /proc filesystem right now.
637 static void check_chroot(int sig)
639 char *argv_init[2] = { "init", NULL, };
640 char *envp_init[3] = { "HOME=/", "TERM=linux", NULL, };
641 char rootpath[256], *tc;
644 if ((fd = open("/proc/sys/kernel/init-chroot", O_RDONLY)) == -1) {
646 "SIGHUP recived, but could not open proc file\r\n");
650 if (read(fd, rootpath, sizeof(rootpath)) == -1) {
652 "SIGHUP recived, but could not read proc file\r\n");
658 if (rootpath[0] == '\0') {
660 "SIGHUP recived, but new root is not valid: %s\r\n",
666 tc = strrchr(rootpath, '\n');
669 /* Ok, making it this far means we commit */
670 message(CONSOLE, "Please stand by, changing root to `%s'.\r\n",
673 /* kill all other programs first */
674 message(CONSOLE, "Sending SIGTERM to all processes.\r\n");
679 message(CONSOLE, "Sending SIGKILL to all processes.\r\n");
684 /* ok, we don't need /proc anymore. we also assume that the signaling
685 * process left the rest of the filesystems alone for us */
688 /* Ok, now we chroot. Hopefully we only have two things mounted, the
689 * new chroot'd mount point, and the old "/" mount. s,
690 * we go ahead and unmount the old "/". This should trigger the kernel
691 * to set things up the Right Way(tm). */
693 if (!chroot(rootpath))
696 /* If the chroot fails, we are already too far to turn back, so we
697 * continue and hope that executing init below will revive the system */
699 /* close all of our descriptors and open new ones */
703 open("/dev/console", O_RDWR, 0);
707 message(CONSOLE, "Executing real init...\r\n");
708 /* execute init in the (hopefully) new root */
709 execve("/sbin/init", argv_init, envp_init);
712 "ERROR: Could not exec new init. Press %s to reboot.\r\n",
713 (secondConsole == NULL) /* serial console */
714 ? "Reset" : "CTRL-ALT-DEL");
717 #endif /* BB_FEATURE_INIT_CHROOT */
719 #endif /* ! DEBUG_INIT */
721 void new_initAction(initActionEnum action, char *process, char *cons)
723 initAction *newAction;
728 /* If BusyBox detects that a serial console is in use,
729 * then entries not refering to the console or null devices will _not_ be run.
730 * The exception to this rule is the null device.
732 if (secondConsole == NULL && strcmp(cons, console)
733 && strcmp(cons, "/dev/null"))
736 newAction = calloc((size_t) (1), sizeof(initAction));
738 message(LOG | CONSOLE, "Memory allocation failure\n");
742 newAction->nextPtr = initActionList;
743 initActionList = newAction;
744 strncpy(newAction->process, process, 255);
745 newAction->action = action;
746 strncpy(newAction->console, cons, 255);
748 // message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n",
749 // newAction->process, newAction->action, newAction->console);
752 static void delete_initAction(initAction * action)
754 initAction *a, *b = NULL;
756 for (a = initActionList; a; b = a, a = a->nextPtr) {
759 initActionList = a->nextPtr;
761 b->nextPtr = a->nextPtr;
769 /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined,
770 * then parse_inittab() simply adds in some default
771 * actions(i.e runs INIT_SCRIPT and then starts a pair
772 * of "askfirst" shells). If BB_FEATURE_USE_INITTAB
773 * _is_ defined, but /etc/inittab is missing, this
774 * results in the same set of default behaviors.
776 void parse_inittab(void)
778 #ifdef BB_FEATURE_USE_INITTAB
780 char buf[256], lineAsRead[256], tmpConsole[256];
781 char *id, *runlev, *action, *process, *eol;
782 const struct initActionType *a = actions;
786 file = fopen(INITTAB, "r");
788 /* No inittab file -- set up some default behavior */
790 /* Swapoff on halt/reboot */
791 new_initAction(CTRLALTDEL, "/sbin/swapoff -a > /dev/null 2>&1", console);
792 /* Umount all filesystems on halt/reboot */
793 new_initAction(CTRLALTDEL, "/bin/umount -a -r > /dev/null 2>&1", console);
794 /* Askfirst shell on tty1 */
795 new_initAction(ASKFIRST, SHELL, console);
796 /* Askfirst shell on tty2 */
797 if (secondConsole != NULL)
798 new_initAction(ASKFIRST, SHELL, secondConsole);
800 new_initAction(SYSINIT, INIT_SCRIPT, console);
803 #ifdef BB_FEATURE_USE_INITTAB
806 while (fgets(buf, 255, file) != NULL) {
808 /* Skip leading spaces */
809 for (id = buf; *id == ' ' || *id == '\t'; id++);
811 /* Skip the line if it's a comment */
812 if (*id == '#' || *id == '\n')
815 /* Trim the trailing \n */
816 eol = strrchr(id, '\n');
820 /* Keep a copy around for posterity's sake (and error msgs) */
821 strcpy(lineAsRead, buf);
823 /* Separate the ID field from the runlevels */
824 runlev = strchr(id, ':');
825 if (runlev == NULL || *(runlev + 1) == '\0') {
826 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
833 /* Separate the runlevels from the action */
834 action = strchr(runlev, ':');
835 if (action == NULL || *(action + 1) == '\0') {
836 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
843 /* Separate the action from the process */
844 process = strchr(action, ':');
845 if (process == NULL || *(process + 1) == '\0') {
846 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
853 /* Ok, now process it */
855 while (a->name != 0) {
856 if (strcmp(a->name, action) == 0) {
860 strcpy(tmpConsole, "/dev/");
861 strncat(tmpConsole, id, 200);
862 if (stat(tmpConsole, &statBuf) != 0) {
863 message(LOG | CONSOLE,
864 "device '%s' does not exist. Did you read the directions?\n",
870 new_initAction(a->action, process, id);
878 /* Choke on an unknown action */
879 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
883 #endif /* BB_FEATURE_USE_INITTAB */
888 extern int init_main(int argc, char **argv)
895 /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
897 #ifdef BB_FEATURE_LINUXRC
898 && strstr(applet_name, "linuxrc") == NULL
902 usage("init\n\nInit is the parent of all processes.\n\n"
903 "This version of init is designed to be run only "
906 /* Set up sig handlers -- be sure to
907 * clear all of these in run() */
908 signal(SIGUSR1, halt_signal);
909 signal(SIGUSR2, halt_signal);
910 signal(SIGINT, reboot_signal);
911 signal(SIGTERM, reboot_signal);
912 #if defined BB_FEATURE_INIT_CHROOT
913 signal(SIGHUP, check_chroot);
916 /* Turn off rebooting via CTL-ALT-DEL -- we get a
917 * SIGINT on CAD so we can shut things down gracefully... */
918 init_reboot(RB_DISABLE_CAD);
921 /* Figure out what kernel this is running */
922 kernelVersion = get_kernel_revision();
924 /* Figure out where the default console should be */
927 /* Close whatever files are open, and reset the console. */
935 /* Make sure PATH is set to something sane */
936 putenv(_PATH_STDPATH);
941 #if ! defined BB_FEATURE_EXTRA_QUIET
945 "init started: %s\r\n", full_version);
948 #if ! defined BB_FEATURE_EXTRA_QUIET
952 "init(%d) started: %s\r\n", getpid(), full_version);
956 /* Make sure there is enough memory to do something useful. */
959 /* Check if we are supposed to be in single user mode */
960 if (argc > 1 && (!strcmp(argv[1], "single") ||
961 !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
962 /* Ask first then start a shell on tty2 */
963 if (secondConsole != NULL)
964 new_initAction(ASKFIRST, SHELL, secondConsole);
965 /* Start a shell on tty1 */
966 new_initAction(RESPAWN, SHELL, console);
968 /* Not in single user mode -- see what inittab says */
970 /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined,
971 * then parse_inittab() simply adds in some default
972 * actions(i.e runs INIT_SCRIPT and then starts a pair
973 * of "askfirst" shells */
977 /* Fix up argv[0] to be certain we claim to be init */
978 strncpy(argv[0], "init", strlen(argv[0])+1);
980 strncpy(argv[1], "\0", strlen(argv[1])+1);
982 /* Now run everything that needs to be run */
984 /* First run the sysinit command */
985 for (a = initActionList; a; a = a->nextPtr) {
986 if (a->action == SYSINIT) {
987 waitfor(a->process, a->console, FALSE);
988 /* Now remove the "sysinit" entry from the list */
989 delete_initAction(a);
992 /* Next run anything that wants to block */
993 for (a = initActionList; a; a = a->nextPtr) {
994 if (a->action == WAIT) {
995 waitfor(a->process, a->console, FALSE);
996 /* Now remove the "wait" entry from the list */
997 delete_initAction(a);
1000 /* Next run anything to be run only once */
1001 for (a = initActionList; a; a = a->nextPtr) {
1002 if (a->action == ONCE) {
1003 run(a->process, a->console, FALSE);
1004 /* Now remove the "once" entry from the list */
1005 delete_initAction(a);
1008 /* If there is nothing else to do, stop */
1009 if (initActionList == NULL) {
1010 message(LOG | CONSOLE,
1011 "No more tasks for init -- sleeping forever.\n");
1016 /* Now run the looping stuff for the rest of forever */
1018 for (a = initActionList; a; a = a->nextPtr) {
1019 /* Only run stuff with pid==0. If they have
1020 * a pid, that means they are still running */
1022 switch (a->action) {
1024 /* run the respawn stuff */
1025 a->pid = run(a->process, a->console, FALSE);
1028 /* run the askfirst stuff */
1029 a->pid = run(a->process, a->console, TRUE);
1031 /* silence the compiler's incessant whining */
1037 /* Wait for a child process to exit */
1038 wpid = wait(&status);
1040 /* Find out who died and clean up their corpse */
1041 for (a = initActionList; a; a = a->nextPtr) {
1042 if (a->pid == wpid) {
1045 "Process '%s' (pid %d) exited. Scheduling it for restart.\n",
1056 c-file-style: "linux"