From 0298be88aece2a10b04c71db34fb154bdbbc45c9 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Tue, 5 Mar 2002 15:12:19 +0000 Subject: [PATCH] Update init.c per my changes in the stable branch -Erik --- init/init.c | 491 ++++++++++++++++++++++++++++------------------------ 1 file changed, 269 insertions(+), 222 deletions(-) diff --git a/init/init.c b/init/init.c index e48dc50cc..408dd1f95 100644 --- a/init/init.c +++ b/init/init.c @@ -47,6 +47,9 @@ # include #endif +#if defined(__UCLIBC__) && !defined(__UCLIBC_HAS_MMU__) +#define fork vfork +#endif /* From */ struct vt_stat { @@ -82,19 +85,10 @@ struct serial_struct { #define init_reboot(magic) reboot(0xfee1dead, 672274793, magic) #endif -#ifndef RB_HALT_SYSTEM -static const int RB_HALT_SYSTEM = 0xcdef0123; -static const int RB_ENABLE_CAD = 0x89abcdef; -static const int RB_DISABLE_CAD = 0; -#define RB_POWER_OFF 0x4321fedc -static const int RB_AUTOBOOT = 0x01234567; -#endif - #ifndef _PATH_STDPATH #define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin" #endif - #if defined CONFIG_FEATURE_INIT_COREDUMPS /* * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called @@ -115,7 +109,6 @@ static const int RB_AUTOBOOT = 0x01234567; extern int bdflush (int func, long int data); #endif - #define SHELL "/bin/sh" /* Default shell */ #define LOGIN_SHELL "-" SHELL /* Default login shell */ #define INITTAB "/etc/inittab" /* inittab file location */ @@ -124,35 +117,24 @@ static const int RB_AUTOBOOT = 0x01234567; #endif #define MAXENV 16 /* Number of env. vars */ -//static const int MAXENV = 16; /* Number of env. vars */ -static const int LOG = 0x1; -static const int CONSOLE = 0x2; -#if defined BB_FEATURE_EXTRA_QUIET -static const int MAYBE_CONSOLE = 0x0; -#else -#define MAYBE_CONSOLE CONSOLE -#endif - /* Allowed init action types */ -typedef enum { - SYSINIT = 1, - RESPAWN, - ASKFIRST, - WAIT, - ONCE, - CTRLALTDEL, - SHUTDOWN, - RESTART -} initActionEnum; +#define SYSINIT 0x001 +#define RESPAWN 0x002 +#define ASKFIRST 0x004 +#define WAIT 0x008 +#define ONCE 0x010 +#define CTRLALTDEL 0x020 +#define SHUTDOWN 0x040 +#define RESTART 0x080 /* A mapping between "inittab" action name strings and action type codes. */ -typedef struct initActionType { +struct init_action_type { const char *name; - initActionEnum action; -} initActionType; + int action; +}; -static const struct initActionType actions[] = { +static const struct init_action_type actions[] = { {"sysinit", SYSINIT}, {"respawn", RESPAWN}, {"askfirst", ASKFIRST}, @@ -164,18 +146,17 @@ static const struct initActionType actions[] = { {0, 0} }; -/* Set up a linked list of initActions, to be read from inittab */ -typedef struct initActionTag initAction; -struct initActionTag { +/* Set up a linked list of init_actions, to be read from inittab */ +struct init_action { pid_t pid; - char process[256]; - char console[256]; - initAction *nextPtr; - initActionEnum action; + char command[256]; + char terminal[256]; + struct init_action *next; + int action; }; -static initAction *initActionList = NULL; - +/* Static variables */ +static struct init_action *init_action_list = NULL; static char *secondConsole = VC_2; static char *thirdConsole = VC_3; static char *fourthConsole = VC_4; @@ -183,9 +164,26 @@ static char *log = VC_5; static int kernelVersion = 0; static char termType[32] = "TERM=linux"; static char console[32] = _PATH_CONSOLE; -sig_atomic_t got_cont = 0; +static sig_atomic_t got_cont = 0; +static const int LOG = 0x1; +static const int CONSOLE = 0x2; +#if defined BB_FEATURE_EXTRA_QUIET +static const int MAYBE_CONSOLE = 0x0; +#else +#define MAYBE_CONSOLE CONSOLE +#endif +#ifndef RB_HALT_SYSTEM +static const int RB_HALT_SYSTEM = 0xcdef0123; +static const int RB_ENABLE_CAD = 0x89abcdef; +static const int RB_DISABLE_CAD = 0; +#define RB_POWER_OFF 0x4321fedc +static const int RB_AUTOBOOT = 0x01234567; +#endif + +/* Function prototypes */ +static void delete_init_action(struct init_action *a); +static int waitfor(struct init_action *a); -static void delete_initAction(initAction * action); static void loop_forever(void) { @@ -200,8 +198,7 @@ static inline messageND(int device, char *fmt, ...) { } #else #define messageND message #endif -static void message(int device, char *fmt, ...) - __attribute__ ((format (printf, 2, 3))); +static void message(int device, char *fmt, ...) __attribute__ ((format (printf, 2, 3))); static void message(int device, char *fmt, ...) { va_list arguments; @@ -216,7 +213,7 @@ static void message(int device, char *fmt, ...) va_start(arguments, fmt); vsnprintf(msg, sizeof(msg), fmt, arguments); va_end(arguments); - syslog_msg(LOG_USER, LOG_USER|LOG_INFO, msg); + syslog_msg(LOG_USER, LOG_INFO, msg); } #else static int log_fd = -1; @@ -247,8 +244,7 @@ static void message(int device, char *fmt, ...) /* Always send console messages to /dev/console so people will see them. */ if ( (fd = - device_open(_PATH_CONSOLE, - O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) { + device_open(_PATH_CONSOLE, O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) { va_start(arguments, fmt); vdprintf(fd, fmt, arguments); va_end(arguments); @@ -383,8 +379,8 @@ static void console_init(void) /* Perhaps we should panic here? */ safe_strncpy(console, "/dev/null", sizeof(console)); } else { - /* check for serial console and disable logging to tty5 & running a - * shell to tty2-4 */ + /* check for serial console and disable logging to tty5 & + * running a shell to tty2-4 */ if (ioctl(0, TIOCGSERIAL, &sr) == 0) { log = NULL; secondConsole = NULL; @@ -418,23 +414,41 @@ static void fixup_argv(int argc, char **argv, char *new_argv0) } } - -static pid_t run(char *command, char *terminal, int get_enter) +/* Make sure there is enough memory to do something useful. * + * Calls "swapon -a" if needed so be sure /etc/fstab is present... */ +static void check_memory(void) { - int i, j; - int fd; - pid_t pid; - char *tmpCmd, *s; - char *cmd[255], *cmdpath; - char buf[255]; - struct stat sb; - static const char press_enter[] = + struct stat statBuf; -#ifdef CUSTOMIZED_BANNER -#include CUSTOMIZED_BANNER + if (check_free_memory() > 1000) + return; + +#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) + if (stat("/etc/fstab", &statBuf) == 0) { + /* swapon -a requires /proc typically */ + system("/bin/mount -t proc proc /proc"); + /* Try to turn on swap */ + system("/sbin/swapon -a"); + if (check_free_memory() < 1000) + goto goodnight; + } else + goto goodnight; + return; #endif - "\nPlease press Enter to activate this console. "; + goodnight: + message(CONSOLE, + "Sorry, your computer does not have enough memory.\n"); + loop_forever(); +} + +static pid_t run(struct init_action *a) +{ + struct stat sb; + int i, j, fd, junk; + pid_t pid, pgrp, tmp_pid; + char *s, *tmpCmd, *cmd[255], *cmdpath, buf[255]; + sigset_t nmask, omask; char *environment[MAXENV+1] = { termType, "HOME=/", @@ -443,6 +457,11 @@ static pid_t run(char *command, char *terminal, int get_enter) "USER=root", NULL }; + static const char press_enter[] = +#ifdef CUSTOMIZED_BANNER +#include CUSTOMIZED_BANNER +#endif + "\nPlease press Enter to activate this console. "; /* inherit environment to the child, merging our values -andy */ for (i=0; environ[i]; i++) { @@ -457,57 +476,117 @@ static pid_t run(char *command, char *terminal, int get_enter) } } -#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) + /* Block sigchild while forking. */ + sigemptyset(&nmask); + sigaddset(&nmask, SIGCHLD); + sigprocmask(SIG_BLOCK, &nmask, &omask); + if ((pid = fork()) == 0) -#else - if ((pid = vfork()) == 0) -#endif { /* Clean up */ ioctl(0, TIOCNOTTY, 0); close(0); close(1); close(2); + sigprocmask(SIG_SETMASK, &omask, NULL); + + /* Create a new session and make ourself the process group leader */ setsid(); - /* Reset signal handlers set for parent process */ + /* Reset signal handlers that were set by the parent process */ signal(SIGUSR1, SIG_DFL); signal(SIGUSR2, SIG_DFL); - signal(SIGINT, SIG_DFL); + signal(SIGINT, SIG_DFL); signal(SIGTERM, SIG_DFL); - signal(SIGHUP, SIG_DFL); + signal(SIGHUP, SIG_DFL); signal(SIGCONT, SIG_DFL); signal(SIGSTOP, SIG_DFL); signal(SIGTSTP, SIG_DFL); - if ((fd = device_open(terminal, O_RDWR)) < 0) { - if (stat(terminal, &sb) != 0) { + /* Open the new terminal device */ + if ((fd = device_open(a->terminal, O_RDWR|O_NOCTTY)) < 0) { + if (stat(a->terminal, &sb) != 0) { message(LOG | CONSOLE, "device '%s' does not exist.\n", - terminal); - exit(1); + a->terminal); + _exit(1); } - message(LOG | CONSOLE, "Bummer, can't open %s\n", terminal); - exit(1); + message(LOG | CONSOLE, "Bummer, can't open %s\n", a->terminal); + _exit(1); } - dup2(fd, 0); - dup2(fd, 1); - dup2(fd, 2); - ioctl(0, TIOCSCTTY, 1); - tcsetpgrp(0, getpgrp()); + /* Make sure the terminal will act fairly normal for us */ set_term(0); + /* If the init Action requires up to wait, then force the + * supplied terminal to be the controlling tty. */ + if (a->action & (SYSINIT|WAIT|CTRLALTDEL|SHUTDOWN|RESTART)) { + + /* Take over the controlling tty */ + ioctl(fd, TIOCSCTTY, 1); + /* Setup stdin, stdout, stderr for the new process so + * they point to the supplied terminal */ + dup(fd); + dup(fd); + + /* Now fork off another process to just hang around */ + if ((pid = fork()) < 0) { + message(LOG | CONSOLE, "Can't fork!\n"); + _exit(1); + } + + if (pid > 0) { + + /* We are the parent -- wait till the child is done */ + signal(SIGINT, SIG_IGN); + signal(SIGTSTP, SIG_IGN); + signal(SIGQUIT, SIG_IGN); + signal(SIGCHLD, SIG_DFL); + + /* Wait for child to exit */ + while ((tmp_pid = waitpid(pid, &junk, 0)) != pid) { + if (tmp_pid < 0 && errno == ECHILD) + break; + } + + /* See if stealing the controlling tty back is necessary */ + pgrp = tcgetpgrp(tmp_pid); + if (pgrp != getpid()) + _exit(0); + + /* Use a temporary process to steal the controlling tty. */ + if ((pid = fork()) < 0) { + message(LOG | CONSOLE, "Can't fork!\n"); + _exit(1); + } + if (pid == 0) { + setsid(); + ioctl(tmp_pid, TIOCSCTTY, 1); + _exit(0); + } + while((tmp_pid = waitpid(pid, &junk, 0)) != pid) { + if (tmp_pid < 0 && errno == ECHILD) + break; + } + _exit(0); + } + + /* Now fall though to actually execute things */ + } else { + dup(fd); + dup(fd); + } + /* See if any special /bin/sh requiring characters are present */ - if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { + if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { cmd[0] = SHELL; cmd[1] = "-c"; strcpy(buf, "exec "); - safe_strncpy(buf + sizeof("exec "), command, + safe_strncpy(buf + sizeof("exec "), a->command, sizeof(buf) - sizeof("exec ")); cmd[2] = buf; cmd[3] = NULL; } else { /* Convert command (char*) into cmd (char**, one word per string) */ - safe_strncpy(buf, command, sizeof(buf)); + safe_strncpy(buf, a->command, sizeof(buf)); s = buf; for (tmpCmd = buf, i = 0; (tmpCmd = strsep(&s, " \t")) != NULL;) { @@ -547,7 +626,7 @@ static pid_t run(char *command, char *terminal, int get_enter) } } - if (get_enter) { + if (a->action & ASKFIRST) { /* * Save memory by not exec-ing anything large (like a shell) * before the user wants it. This is critical if swap is not @@ -556,15 +635,15 @@ static pid_t run(char *command, char *terminal, int get_enter) * be allowed to start a shell or whatever an init script * specifies. */ - messageND(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\n", - cmd[0], getpid(), terminal); + messageND(LOG, "Waiting for enter to start '%s' (pid %d, terminal %s)\n", + cmdpath, getpid(), a->terminal); write(fileno(stdout), press_enter, sizeof(press_enter) - 1); getc(stdin); } /* Log the process name and args */ messageND(LOG, "Starting pid %d, console %s: '%s'\n", - getpid(), terminal, command); + getpid(), a->terminal, cmdpath); #if defined CONFIG_FEATURE_INIT_COREDUMPS if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) { @@ -582,16 +661,18 @@ static pid_t run(char *command, char *terminal, int get_enter) /* We're still here? Some error happened. */ message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath, strerror(errno)); - exit(-1); + _exit(-1); } + sigprocmask(SIG_SETMASK, &omask, NULL); return pid; } -static int waitfor(char *command, char *terminal, int get_enter) +static int waitfor(struct init_action *a) { + int pid; int status, wpid; - int pid = run(command, terminal, get_enter); + pid = run(a); while (1) { wpid = wait(&status); if (wpid > 0 && wpid != pid) { @@ -603,43 +684,27 @@ static int waitfor(char *command, char *terminal, int get_enter) return wpid; } -/* Make sure there is enough memory to do something useful. * - * Calls "swapon -a" if needed so be sure /etc/fstab is present... */ -static void check_memory(void) +/* Run all commands of a particular type */ +static void run_actions(int action) { - struct stat statBuf; + struct init_action *a, *tmp; - if (check_free_memory() > 1000) - return; - -#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) - if (stat("/etc/fstab", &statBuf) == 0) { - /* swapon -a requires /proc typically */ - waitfor("/bin/mount -t proc proc /proc", console, FALSE); - /* Try to turn on swap */ - waitfor("/sbin/swapon -a", console, FALSE); - if (check_free_memory() < 1000) - goto goodnight; - } else - goto goodnight; - return; -#endif - - goodnight: - message(CONSOLE, - "Sorry, your computer does not have enough memory.\n"); - loop_forever(); -} - -/* Run all commands to be run right before halt/reboot */ -static void run_actions(initActionEnum action) -{ - initAction *a, *tmp; - for (a = initActionList; a; a = tmp) { - tmp = a->nextPtr; + for (a = init_action_list; a; a = tmp) { + tmp = a->next; if (a->action == action) { - waitfor(a->process, a->console, FALSE); - delete_initAction(a); + if (a->action & (SYSINIT|WAIT|CTRLALTDEL|SHUTDOWN|RESTART)) { + waitfor(a); + delete_init_action(a); + } else if (a->action & ONCE) { + run(a); + delete_init_action(a); + } else if (a->action & (RESPAWN|ASKFIRST)) { + /* Only run stuff with pid==0. If they have + * a pid, that means it is still running */ + if (a->pid == 0) { + a->pid = run(a); + } + } } } } @@ -692,16 +757,16 @@ static void shutdown_system(void) static void exec_signal(int sig) { - initAction *a, *tmp; - for (a = initActionList; a; a = tmp) { - tmp = a->nextPtr; - if (a->action == RESTART) { + struct init_action *a, *tmp; + for (a = init_action_list; a; a = tmp) { + tmp = a->next; + if (a->action & RESTART) { shutdown_system(); - message(CONSOLE|LOG, "Trying to re-exec %s\n", a->process); - execl(a->process, a->process, NULL); + message(CONSOLE|LOG, "Trying to re-exec %s\n", a->command); + execl(a->command, a->command, NULL); message(CONSOLE|LOG, "execl of %s failed: %s\n", - a->process, sys_errlist[errno]); + a->command, sys_errlist[errno]); sync(); sleep(2); init_reboot(RB_HALT_SYSTEM); @@ -755,12 +820,10 @@ static void ctrlaltdel_signal(int sig) run_actions(CTRLALTDEL); } -/* - * The SIGSTOP & SIGTSTP handler - */ +/* The SIGSTOP & SIGTSTP handler */ static void stop_handler(int sig) { - int saved_errno = errno; + int saved_errno = errno; got_cont = 0; while(!got_cont) pause(); @@ -768,9 +831,7 @@ static void stop_handler(int sig) errno = saved_errno; } -/* - * The SIGCONT handler - */ +/* The SIGCONT handler */ static void cont_handler(int sig) { got_cont = 1; @@ -778,53 +839,54 @@ static void cont_handler(int sig) #endif /* ! DEBUG_INIT */ -static void new_initAction(initActionEnum action, char *process, char *cons) +static void new_init_action(int action, char *command, char *cons) { - initAction *newAction; - initAction *a; + struct init_action *new_action, *a; if (*cons == '\0') cons = console; - /* If BusyBox detects that a serial console is in use, - * then entries not refering to the console or null devices will _not_ be run. + /* If BusyBox detects that a serial console is in use, then entries + * not refering to the console or null devices will _not_ be run. * The exception to this rule is the null device. */ if (secondConsole == NULL && strcmp(cons, console) && strcmp(cons, "/dev/null")) return; - if (strcmp(cons, "/dev/null") == 0 && action == ASKFIRST) + if (strcmp(cons, "/dev/null") == 0 && (action & ASKFIRST)) return; - newAction = calloc((size_t) (1), sizeof(initAction)); - if (!newAction) { + new_action = calloc((size_t) (1), sizeof(struct init_action)); + if (!new_action) { message(LOG | CONSOLE, "Memory allocation failure\n"); loop_forever(); } - for (a = initActionList; a && a->nextPtr; a = a->nextPtr) ; + + /* Append to the end of the list */ + for (a = init_action_list; a && a->next; a = a->next) ; if (a) { - a->nextPtr = newAction; + a->next = new_action; } else { - initActionList = newAction; + init_action_list = new_action; } - safe_strncpy(newAction->process, process, 255); - newAction->action = action; - safe_strncpy(newAction->console, cons, 255); - newAction->pid = 0; -// message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n", -// newAction->process, newAction->action, newAction->console); + safe_strncpy(new_action->command, command, 255); + new_action->action = action; + safe_strncpy(new_action->terminal, cons, 255); + new_action->pid = 0; +// message(LOG|CONSOLE, "command='%s' action='%d' terminal='%s'\n", +// new_action->command, new_action->action, new_action->terminal); } -static void delete_initAction(initAction * action) +static void delete_init_action(struct init_action * action) { - initAction *a, *b = NULL; + struct init_action *a, *b = NULL; - for (a = initActionList; a; b = a, a = a->nextPtr) { + for (a = init_action_list; a; b = a, a = a->next) { if (a == action) { if (b == NULL) { - initActionList = a->nextPtr; + init_action_list = a->next; } else { - b->nextPtr = a->nextPtr; + b->next = a->next; } free(a); break; @@ -844,8 +906,8 @@ static void parse_inittab(void) #ifdef CONFIG_FEATURE_USE_INITTAB FILE *file; char buf[256], lineAsRead[256], tmpConsole[256]; - char *id, *runlev, *action, *process, *eol; - const struct initActionType *a = actions; + char *id, *runlev, *action, *command, *eol; + const struct init_action_type *a = actions; int foundIt; @@ -854,28 +916,28 @@ static void parse_inittab(void) /* No inittab file -- set up some default behavior */ #endif /* Reboot on Ctrl-Alt-Del */ - new_initAction(CTRLALTDEL, "/sbin/reboot", console); + new_init_action(CTRLALTDEL, "/sbin/reboot", console); /* Umount all filesystems on halt/reboot */ - new_initAction(SHUTDOWN, "/bin/umount -a -r", console); + new_init_action(SHUTDOWN, "/bin/umount -a -r", console); #if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) /* Swapoff on halt/reboot */ - new_initAction(SHUTDOWN, "/sbin/swapoff -a", console); + new_init_action(SHUTDOWN, "/sbin/swapoff -a", console); #endif /* Prepare to restart init when a HUP is received */ - new_initAction(RESTART, "/sbin/init", console); + new_init_action(RESTART, "/sbin/init", console); /* Askfirst shell on tty1 */ - new_initAction(ASKFIRST, LOGIN_SHELL, console); + new_init_action(ASKFIRST, LOGIN_SHELL, console); /* Askfirst shell on tty2 */ if (secondConsole != NULL) - new_initAction(ASKFIRST, LOGIN_SHELL, secondConsole); + new_init_action(ASKFIRST, LOGIN_SHELL, secondConsole); /* Askfirst shell on tty3 */ if (thirdConsole != NULL) - new_initAction(ASKFIRST, LOGIN_SHELL, thirdConsole); + new_init_action(ASKFIRST, LOGIN_SHELL, thirdConsole); /* Askfirst shell on tty4 */ if (fourthConsole != NULL) - new_initAction(ASKFIRST, LOGIN_SHELL, fourthConsole); + new_init_action(ASKFIRST, LOGIN_SHELL, fourthConsole); /* sysinit */ - new_initAction(SYSINIT, INIT_SCRIPT, console); + new_init_action(SYSINIT, INIT_SCRIPT, console); return; #ifdef CONFIG_FEATURE_USE_INITTAB @@ -918,14 +980,14 @@ static void parse_inittab(void) ++action; } - /* Separate the action from the process */ - process = strchr(action, ':'); - if (process == NULL || *(process + 1) == '\0') { + /* Separate the action from the command */ + command = strchr(action, ':'); + if (command == NULL || *(command + 1) == '\0') { message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead); continue; } else { - *process = '\0'; - ++process; + *command = '\0'; + ++command; } /* Ok, now process it */ @@ -937,12 +999,12 @@ static void parse_inittab(void) strncat(tmpConsole, id, 200); id = tmpConsole; } - new_initAction(a->action, process, id); + new_init_action(a->action, command, id); foundIt = TRUE; } a++; } - if (foundIt) + if (foundIt == TRUE) continue; else { /* Choke on an unknown action */ @@ -957,11 +1019,10 @@ static void parse_inittab(void) extern int init_main(int argc, char **argv) { - initAction *a, *tmp; + struct init_action *a; pid_t wpid; int status; - if (argc > 1 && !strcmp(argv[1], "-q")) { /* don't assume init's pid == 1 */ long *pid = find_pid_by_name("init"); @@ -986,10 +1047,10 @@ extern int init_main(int argc, char **argv) } /* Set up sig handlers -- be sure to * clear all of these in run() */ - signal(SIGHUP, exec_signal); + signal(SIGHUP, exec_signal); signal(SIGUSR1, halt_signal); signal(SIGUSR2, halt_signal); - signal(SIGINT, ctrlaltdel_signal); + signal(SIGINT, ctrlaltdel_signal); signal(SIGTERM, reboot_signal); signal(SIGCONT, cont_handler); signal(SIGSTOP, stop_handler); @@ -1029,13 +1090,13 @@ extern int init_main(int argc, char **argv) !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) { /* Ask first then start a shell on tty2-4 */ if (secondConsole != NULL) - new_initAction(ASKFIRST, LOGIN_SHELL, secondConsole); + new_init_action(ASKFIRST, LOGIN_SHELL, secondConsole); if (thirdConsole != NULL) - new_initAction(ASKFIRST, LOGIN_SHELL, thirdConsole); + new_init_action(ASKFIRST, LOGIN_SHELL, thirdConsole); if (fourthConsole != NULL) - new_initAction(ASKFIRST, LOGIN_SHELL, fourthConsole); + new_init_action(ASKFIRST, LOGIN_SHELL, fourthConsole); /* Start a shell on tty1 */ - new_initAction(RESPAWN, LOGIN_SHELL, console); + new_init_action(RESPAWN, LOGIN_SHELL, console); } else { /* Not in single user mode -- see what inittab says */ @@ -1053,58 +1114,44 @@ extern int init_main(int argc, char **argv) /* First run the sysinit command */ run_actions(SYSINIT); + /* Next run anything that wants to block */ run_actions(WAIT); + /* Next run anything to be run only once */ - for (a = initActionList; a; a = tmp) { - tmp = a->nextPtr; - if (a->action == ONCE) { - run(a->process, a->console, FALSE); - /* Now remove the "once" entry from the list */ - delete_initAction(a); - } - } + run_actions(ONCE); + /* If there is nothing else to do, stop */ - if (initActionList == NULL) { - message(LOG | CONSOLE, - "No more tasks for init -- sleeping forever.\n"); + if (init_action_list == NULL) { + message(LOG | CONSOLE, "No more tasks for init -- sleeping forever.\n"); loop_forever(); } /* Now run the looping stuff for the rest of forever */ while (1) { - for (a = initActionList; a; a = a->nextPtr) { - /* Only run stuff with pid==0. If they have - * a pid, that means they are still running */ - if (a->pid == 0) { - switch (a->action) { - case RESPAWN: - /* run the respawn stuff */ - a->pid = run(a->process, a->console, FALSE); - break; - case ASKFIRST: - /* run the askfirst stuff */ - a->pid = run(a->process, a->console, TRUE); - break; - /* silence the compiler's incessant whining */ - default: - break; - } - } - } + /* run the respawn stuff */ + run_actions(RESPAWN); + + /* run the askfirst stuff */ + run_actions(ASKFIRST); + + /* Don't consume all CPU time -- sleep a bit */ + sleep(1); + /* Wait for a child process to exit */ wpid = wait(&status); if (wpid > 0) { /* Find out who died and clean up their corpse */ - for (a = initActionList; a; a = a->nextPtr) { + for (a = init_action_list; a; a = a->next) { if (a->pid == wpid) { + /* Set the pid to 0 so that the process gets + * restarted by run_actions() */ a->pid = 0; - message(LOG, "Process '%s' (pid %d) exited. Scheduling it for restart.\n", - a->process, wpid); + message(LOG, "Process '%s' (pid %d) exited. " + "Scheduling it for restart.\n", a->command, wpid); } } } - sleep(1); } } -- 2.25.1