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 #include <sys/syscall.h>
119 #include <linux/unistd.h>
120 static _syscall2(int, bdflush, int, func, int, data);
121 #endif /* __GLIBC__ */
124 #define VT_PRIMARY "/dev/tty1" /* Primary virtual console */
125 #define VT_SECONDARY "/dev/tty2" /* Virtual console */
126 #define VT_THIRD "/dev/tty3" /* Virtual console */
127 #define VT_FOURTH "/dev/tty4" /* Virtual console */
128 #define VT_LOG "/dev/tty5" /* Virtual console */
129 #define SERIAL_CON0 "/dev/ttyS0" /* Primary serial console */
130 #define SERIAL_CON1 "/dev/ttyS1" /* Serial console */
131 #define SHELL "-/bin/sh" /* Default shell */
132 #define INITTAB "/etc/inittab" /* inittab file location */
134 #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */
137 static const int MAXENV = 16; /* Number of env. vars */
138 static const int LOG = 0x1;
139 static const int CONSOLE = 0x2;
141 /* 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},
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 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);
190 /* Print a message to the specified device.
191 * Device may be bitwise-or'd from LOG | CONSOLE */
192 static void message(int device, char *fmt, ...)
193 __attribute__ ((format (printf, 2, 3)));
194 static void message(int device, char *fmt, ...)
201 /* Log the message to syslogd */
205 va_start(arguments, fmt);
206 vsnprintf(msg, sizeof(msg), fmt, arguments);
208 openlog(applet_name, 0, LOG_USER);
209 syslog(LOG_USER|LOG_INFO, msg);
213 static int log_fd = -1;
215 /* Take full control of the log tty, and never close it.
216 * It's mine, all mine! Muhahahaha! */
219 /* don't even try to log, because there is no such console */
221 /* log to main console instead */
223 } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) {
225 fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log);
230 if ((device & LOG) && (log_fd >= 0)) {
231 va_start(arguments, fmt);
232 vdprintf(log_fd, fmt, arguments);
237 if (device & CONSOLE) {
238 /* Always send console messages to /dev/console so people will see them. */
241 device_open(_PATH_CONSOLE,
242 O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
243 va_start(arguments, fmt);
244 vdprintf(fd, fmt, arguments);
248 fprintf(stderr, "Bummer, can't print: ");
249 va_start(arguments, fmt);
250 vfprintf(stderr, fmt, arguments);
256 /* Set terminal settings to reasonable defaults */
257 void set_term(int fd)
263 /* set control chars */
264 tty.c_cc[VINTR] = 3; /* C-c */
265 tty.c_cc[VQUIT] = 28; /* C-\ */
266 tty.c_cc[VERASE] = 127; /* C-? */
267 tty.c_cc[VKILL] = 21; /* C-u */
268 tty.c_cc[VEOF] = 4; /* C-d */
269 tty.c_cc[VSTART] = 17; /* C-q */
270 tty.c_cc[VSTOP] = 19; /* C-s */
271 tty.c_cc[VSUSP] = 26; /* C-z */
273 /* use line dicipline 0 */
276 /* Make it be sane */
277 tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
278 tty.c_cflag |= HUPCL|CLOCAL;
281 tty.c_iflag = ICRNL | IXON | IXOFF;
284 tty.c_oflag = OPOST | ONLCR;
288 ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN;
290 tcsetattr(fd, TCSANOW, &tty);
293 /* How much memory does this machine have?
294 Units are kBytes to avoid overflow on 4GB machines */
295 static int check_free_memory()
298 unsigned int result, u, s=10;
300 if (sysinfo(&info) != 0) {
301 perror_msg("Error checking free memory");
305 /* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes.
306 * Kernels 2.4.0 return info.mem_unit in bytes. */
309 while ( (u&1) == 0 && s > 0 ) { u>>=1; s--; }
310 result = (info.totalram>>s) + (info.totalswap>>s);
312 if (result < 0) result = INT_MAX;
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 tty5 & running a
379 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
381 secondConsole = NULL;
383 fourthConsole = NULL;
384 /* Force the TERM setting to vt102 for serial console --
385 * iff TERM is set to linux (the default) */
386 if (strcmp( termType, "TERM=linux" ) == 0)
387 snprintf(termType, sizeof(termType) - 1, "TERM=vt102");
388 message(LOG | CONSOLE,
389 "serial console detected. Disabling virtual terminals.\r\n");
393 message(LOG, "console=%s\n", console);
396 static pid_t run(char *command, char *terminal, int get_enter)
402 char *cmd[255], *cmdpath;
404 static const char press_enter[] =
406 #ifdef CUSTOMIZED_BANNER
407 #include CUSTOMIZED_BANNER
410 "\nPlease press Enter to activate this console. ";
411 char *environment[MAXENV+1] = {
413 "PATH=/usr/bin:/bin:/usr/sbin:/sbin",
419 while (environment[i]) i++;
420 while ((environ[j]) && (i < MAXENV)) {
421 if (strncmp(environ[j], "TERM=", 5))
422 environment[i++] = environ[j];
424 snprintf(termType, sizeof(termType) - 1, environ[j]);
429 if ((pid = fork()) == 0) {
431 ioctl(0, TIOCNOTTY, 0);
437 /* Reset signal handlers set for parent process */
438 signal(SIGUSR1, SIG_DFL);
439 signal(SIGUSR2, SIG_DFL);
440 signal(SIGINT, SIG_DFL);
441 signal(SIGTERM, SIG_DFL);
442 signal(SIGHUP, SIG_DFL);
444 if ((fd = device_open(terminal, O_RDWR)) < 0) {
445 message(LOG | CONSOLE, "Bummer, can't open %s\r\n", terminal);
451 ioctl(0, TIOCSCTTY, 1);
452 tcsetpgrp(0, getpgrp());
455 if (get_enter == TRUE) {
457 * Save memory by not exec-ing anything large (like a shell)
458 * before the user wants it. This is critical if swap is not
459 * enabled and the system has low memory. Generally this will
460 * be run on the second virtual console, and the first will
461 * be allowed to start a shell or whatever an init script
465 pid_t shell_pgid = getpid();
466 message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
467 command, shell_pgid, terminal);
469 write(fileno(stdout), press_enter, sizeof(press_enter) - 1);
474 /* Log the process name and args */
475 message(LOG, "Starting pid %d, console %s: '%s'\r\n",
476 shell_pgid, terminal, command);
479 /* See if any special /bin/sh requiring characters are present */
480 if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
483 strcpy(buf, "exec ");
484 strncat(buf, command, sizeof(buf) - strlen(buf) - 1);
488 /* Convert command (char*) into cmd (char**, one word per string) */
489 for (tmpCmd = command, i = 0;
490 (tmpCmd = strsep(&command, " \t")) != NULL;) {
491 if (*tmpCmd != '\0') {
503 Interactive shells want to see a dash in argv[0]. This
504 typically is handled by login, argv will be setup this
505 way if a dash appears at the front of the command path
509 if (*cmdpath == '-') {
512 /* skip over the dash */
515 /* find the last component in the command pathname */
516 s = get_last_path_component(cmdpath);
518 /* make a new argv[0] */
519 if ((cmd[0] = malloc(strlen(s)+2)) == NULL) {
520 message(LOG | CONSOLE, "malloc failed");
528 #if defined BB_FEATURE_INIT_COREDUMPS
531 if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) {
533 limit.rlim_cur = RLIM_INFINITY;
534 limit.rlim_max = RLIM_INFINITY;
535 setrlimit(RLIMIT_CORE, &limit);
540 /* Now run it. The new program will take over this PID,
541 * so nothing further in init.c should be run. */
542 execve(cmdpath, cmd, environment);
544 /* We're still here? Some error happened. */
545 message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath,
552 static int waitfor(char *command, char *terminal, int get_enter)
555 int pid = run(command, terminal, get_enter);
558 wpid = wait(&status);
559 if (wpid > 0 && wpid != pid) {
568 /* Make sure there is enough memory to do something useful. *
569 * Calls "swapon -a" if needed so be sure /etc/fstab is present... */
570 static void check_memory()
574 if (check_free_memory() > 1000)
577 if (stat("/etc/fstab", &statBuf) == 0) {
578 /* swapon -a requires /proc typically */
579 waitfor("mount proc /proc -t proc", console, FALSE);
580 /* Try to turn on swap */
581 waitfor("swapon -a", console, FALSE);
582 if (check_free_memory() < 1000)
590 "Sorry, your computer does not have enough memory.\r\n");
595 /* Run all commands to be run right before halt/reboot */
596 static void run_lastAction(void)
599 for (a = initActionList; a; a = a->nextPtr) {
600 if (a->action == CTRLALTDEL) {
601 waitfor(a->process, a->console, FALSE);
602 delete_initAction(a);
609 static void shutdown_system(void)
612 /* first disable our SIGHUP signal */
613 signal(SIGHUP, SIG_DFL);
615 /* Allow Ctrl-Alt-Del to reboot system. */
616 init_reboot(RB_ENABLE_CAD);
618 message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n");
621 /* Send signals to every process _except_ pid 1 */
622 message(CONSOLE|LOG, "Sending SIGTERM to all processes.\r\n");
627 message(CONSOLE|LOG, "Sending SIGKILL to all processes.\r\n");
631 /* run everything to be run at "ctrlaltdel" */
635 if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) {
636 /* bdflush, kupdate not needed for kernels >2.2.11 */
642 static void halt_signal(int sig)
646 "The system is halted. Press %s or turn off power\r\n",
647 (secondConsole == NULL) /* serial console */
648 ? "Reset" : "CTRL-ALT-DEL");
651 /* allow time for last message to reach serial console */
654 if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0))
655 init_reboot(RB_POWER_OFF);
657 init_reboot(RB_HALT_SYSTEM);
661 static void reboot_signal(int sig)
664 message(CONSOLE|LOG, "Please stand by while rebooting the system.\r\n");
667 /* allow time for last message to reach serial console */
670 init_reboot(RB_AUTOBOOT);
674 #endif /* ! DEBUG_INIT */
676 void new_initAction(initActionEnum action, char *process, char *cons)
678 initAction *newAction;
683 /* If BusyBox detects that a serial console is in use,
684 * then entries not refering to the console or null devices will _not_ be run.
685 * The exception to this rule is the null device.
687 if (secondConsole == NULL && strcmp(cons, console)
688 && strcmp(cons, "/dev/null"))
691 newAction = calloc((size_t) (1), sizeof(initAction));
693 message(LOG | CONSOLE, "Memory allocation failure\n");
697 newAction->nextPtr = initActionList;
698 initActionList = newAction;
699 strncpy(newAction->process, process, 255);
700 newAction->action = action;
701 strncpy(newAction->console, cons, 255);
703 // message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n",
704 // newAction->process, newAction->action, newAction->console);
707 static void delete_initAction(initAction * action)
709 initAction *a, *b = NULL;
711 for (a = initActionList; a; b = a, a = a->nextPtr) {
714 initActionList = a->nextPtr;
716 b->nextPtr = a->nextPtr;
724 /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined,
725 * then parse_inittab() simply adds in some default
726 * actions(i.e runs INIT_SCRIPT and then starts a pair
727 * of "askfirst" shells). If BB_FEATURE_USE_INITTAB
728 * _is_ defined, but /etc/inittab is missing, this
729 * results in the same set of default behaviors.
731 void parse_inittab(void)
733 #ifdef BB_FEATURE_USE_INITTAB
735 char buf[256], lineAsRead[256], tmpConsole[256];
736 char *id, *runlev, *action, *process, *eol;
737 const struct initActionType *a = actions;
741 file = fopen(INITTAB, "r");
743 /* No inittab file -- set up some default behavior */
745 /* Swapoff on halt/reboot */
746 new_initAction(CTRLALTDEL, "/sbin/swapoff -a", console);
747 /* Umount all filesystems on halt/reboot */
748 new_initAction(CTRLALTDEL, "/bin/umount -a -r", console);
749 /* Askfirst shell on tty1 */
750 new_initAction(ASKFIRST, SHELL, console);
751 /* Askfirst shell on tty2 */
752 if (secondConsole != NULL)
753 new_initAction(ASKFIRST, SHELL, secondConsole);
754 /* Askfirst shell on tty3 */
755 if (thirdConsole != NULL)
756 new_initAction(ASKFIRST, SHELL, thirdConsole);
757 /* Askfirst shell on tty4 */
758 if (fourthConsole != NULL)
759 new_initAction(ASKFIRST, SHELL, fourthConsole);
761 new_initAction(SYSINIT, INIT_SCRIPT, console);
764 #ifdef BB_FEATURE_USE_INITTAB
767 while (fgets(buf, 255, file) != NULL) {
769 /* Skip leading spaces */
770 for (id = buf; *id == ' ' || *id == '\t'; id++);
772 /* Skip the line if it's a comment */
773 if (*id == '#' || *id == '\n')
776 /* Trim the trailing \n */
777 eol = strrchr(id, '\n');
781 /* Keep a copy around for posterity's sake (and error msgs) */
782 strcpy(lineAsRead, buf);
784 /* Separate the ID field from the runlevels */
785 runlev = strchr(id, ':');
786 if (runlev == NULL || *(runlev + 1) == '\0') {
787 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
794 /* Separate the runlevels from the action */
795 action = strchr(runlev, ':');
796 if (action == NULL || *(action + 1) == '\0') {
797 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
804 /* Separate the action from the process */
805 process = strchr(action, ':');
806 if (process == NULL || *(process + 1) == '\0') {
807 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
814 /* Ok, now process it */
816 while (a->name != 0) {
817 if (strcmp(a->name, action) == 0) {
821 strcpy(tmpConsole, "/dev/");
822 strncat(tmpConsole, id, 200);
823 if (stat(tmpConsole, &statBuf) != 0) {
824 message(LOG | CONSOLE,
825 "device '%s' does not exist. Did you read the directions?\n",
831 new_initAction(a->action, process, id);
839 /* Choke on an unknown action */
840 message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
844 #endif /* BB_FEATURE_USE_INITTAB */
849 extern int init_main(int argc, char **argv)
856 /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
858 #ifdef BB_FEATURE_LINUXRC
859 && strstr(applet_name, "linuxrc") == NULL
865 /* Set up sig handlers -- be sure to
866 * clear all of these in run() */
867 signal(SIGUSR1, halt_signal);
868 signal(SIGUSR2, halt_signal);
869 signal(SIGINT, reboot_signal);
870 signal(SIGTERM, reboot_signal);
872 /* Turn off rebooting via CTL-ALT-DEL -- we get a
873 * SIGINT on CAD so we can shut things down gracefully... */
874 init_reboot(RB_DISABLE_CAD);
877 /* Figure out what kernel this is running */
878 kernelVersion = get_kernel_revision();
880 /* Figure out where the default console should be */
883 /* Close whatever files are open, and reset the console. */
891 /* Make sure PATH is set to something sane */
892 putenv(_PATH_STDPATH);
897 #if ! defined BB_FEATURE_EXTRA_QUIET
901 "init started: %s\r\n", full_version);
904 #if ! defined BB_FEATURE_EXTRA_QUIET
908 "init(%d) started: %s\r\n", getpid(), full_version);
912 /* Make sure there is enough memory to do something useful. */
915 /* Check if we are supposed to be in single user mode */
916 if (argc > 1 && (!strcmp(argv[1], "single") ||
917 !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
918 /* Ask first then start a shell on tty2-4 */
919 if (secondConsole != NULL)
920 new_initAction(ASKFIRST, SHELL, secondConsole);
921 if (thirdConsole != NULL)
922 new_initAction(ASKFIRST, SHELL, thirdConsole);
923 if (fourthConsole != NULL)
924 new_initAction(ASKFIRST, SHELL, fourthConsole);
925 /* Start a shell on tty1 */
926 new_initAction(RESPAWN, SHELL, console);
928 /* Not in single user mode -- see what inittab says */
930 /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined,
931 * then parse_inittab() simply adds in some default
932 * actions(i.e runs INIT_SCRIPT and then starts a pair
933 * of "askfirst" shells */
937 /* Fix up argv[0] to be certain we claim to be init */
943 /* Now run everything that needs to be run */
945 /* First run the sysinit command */
946 for (a = initActionList; a; a = a->nextPtr) {
947 if (a->action == SYSINIT) {
948 waitfor(a->process, a->console, FALSE);
949 /* Now remove the "sysinit" entry from the list */
950 delete_initAction(a);
953 /* Next run anything that wants to block */
954 for (a = initActionList; a; a = a->nextPtr) {
955 if (a->action == WAIT) {
956 waitfor(a->process, a->console, FALSE);
957 /* Now remove the "wait" entry from the list */
958 delete_initAction(a);
961 /* Next run anything to be run only once */
962 for (a = initActionList; a; a = a->nextPtr) {
963 if (a->action == ONCE) {
964 run(a->process, a->console, FALSE);
965 /* Now remove the "once" entry from the list */
966 delete_initAction(a);
969 /* If there is nothing else to do, stop */
970 if (initActionList == NULL) {
971 message(LOG | CONSOLE,
972 "No more tasks for init -- sleeping forever.\n");
977 /* Now run the looping stuff for the rest of forever */
979 for (a = initActionList; a; a = a->nextPtr) {
980 /* Only run stuff with pid==0. If they have
981 * a pid, that means they are still running */
985 /* run the respawn stuff */
986 a->pid = run(a->process, a->console, FALSE);
989 /* run the askfirst stuff */
990 a->pid = run(a->process, a->console, TRUE);
992 /* silence the compiler's incessant whining */
998 /* Wait for a child process to exit */
999 wpid = wait(&status);
1001 /* Find out who died and clean up their corpse */
1002 for (a = initActionList; a; a = a->nextPtr) {
1003 if (a->pid == wpid) {
1006 "Process '%s' (pid %d) exited. Scheduling it for restart.\n",
1017 c-file-style: "linux"