/*
* Mini init implementation for busybox
*
- *
* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
+ * Copyright (C) 1999-2002 by Erik Andersen <andersee@debian.org>
* Adjusted by so many folks, it's impossible to keep track.
*
* This program is free software; you can redistribute it and/or modify
# include <sys/syslog.h>
#endif
+#if defined(__UCLIBC__) && !defined(__UCLIBC_HAS_MMU__)
+#define fork vfork
+#endif
/* From <linux/vt.h> */
struct vt_stat {
#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
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 */
#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;
/* Allowed init action types */
-typedef enum {
- SYSINIT = 1,
- RESPAWN,
- ASKFIRST,
- WAIT,
- ONCE,
- CTRLALTDEL,
- SHUTDOWN
-} 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},
{"once", ONCE},
{"ctrlaltdel", CTRLALTDEL},
{"shutdown", SHUTDOWN},
+ {"restart", RESTART},
{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;
static int kernelVersion = 0;
static char termType[32] = "TERM=linux";
static char console[32] = _PATH_CONSOLE;
+static sig_atomic_t got_cont = 0;
+static const int LOG = 0x1;
+static const int CONSOLE = 0x2;
+#if defined CONFIG_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)
{
/* Print a message to the specified device.
* Device may be bitwise-or'd from LOG | CONSOLE */
-static void message(int device, char *fmt, ...)
- __attribute__ ((format (printf, 2, 3)));
+#ifdef DEBUG_INIT
+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, ...)
{
va_list arguments;
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;
/* 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);
/* 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;
if (strcmp( termType, "TERM=linux" ) == 0)
safe_strncpy(termType, "TERM=vt102", sizeof(termType));
message(LOG | CONSOLE,
- "serial console detected. Disabling virtual terminals.\n");
+ "\rserial console detected. Disabling virtual terminals.\n");
}
close(fd);
}
}
}
-
-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,
+ "\rSorry, 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=/",
"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++) {
}
}
-#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);
-
- if ((fd = device_open(terminal, O_RDWR)) < 0) {
- if (stat(terminal, &sb) != 0) {
- message(LOG | CONSOLE, "device '%s' does not exist.\n",
- terminal);
- exit(1);
+ signal(SIGHUP, SIG_DFL);
+ signal(SIGCONT, SIG_DFL);
+ signal(SIGSTOP, SIG_DFL);
+ signal(SIGTSTP, SIG_DFL);
+
+ /* 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, "\rdevice '%s' does not exist.\n",
+ a->terminal);
+ _exit(1);
}
- message(LOG | CONSOLE, "Bummer, can't open %s\n", terminal);
- exit(1);
+ message(LOG | CONSOLE, "\rBummer, 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|ASKFIRST)) {
+
+ /* 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, "\rCan'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;) {
}
}
- if (get_enter == TRUE) {
+ 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
* be allowed to start a shell or whatever an init script
* specifies.
*/
-#ifdef DEBUG_INIT
- message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\n",
- cmd[0], getpid(), terminal);
-#endif
+ 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);
}
-#ifdef DEBUG_INIT
/* Log the process name and args */
- message(LOG, "Starting pid %d, console %s: '%s'\n",
- getpid(), terminal, command);
-#endif
+ messageND(LOG, "Starting pid %d, console %s: '%s'\n",
+ getpid(), a->terminal, cmdpath);
#if defined CONFIG_FEATURE_INIT_COREDUMPS
if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) {
execve(cmdpath, cmd, environment);
/* We're still here? Some error happened. */
- message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath,
+ message(LOG | CONSOLE, "\rBummer, 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) {
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;
-
- if (check_free_memory() > 1000)
- return;
+ struct init_action *a, *tmp;
-#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__)
- if (stat("/etc/fstab", &statBuf) == 0) {
- /* swapon -a requires /proc typically */
- waitfor("mount proc /proc -t proc", console, FALSE);
- /* Try to turn on swap */
- waitfor("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);
+ }
+ }
}
}
}
sigaddset(&block_signals, SIGUSR2);
sigaddset(&block_signals, SIGINT);
sigaddset(&block_signals, SIGTERM);
+ sigaddset(&block_signals, SIGCONT);
+ sigaddset(&block_signals, SIGSTOP);
+ sigaddset(&block_signals, SIGTSTP);
sigprocmask(SIG_BLOCK, &block_signals, NULL);
/* Allow Ctrl-Alt-Del to reboot system. */
init_reboot(RB_ENABLE_CAD);
- message(CONSOLE|LOG, "\nThe system is going down NOW !!\n");
+ message(CONSOLE|LOG, "\n\rThe system is going down NOW !!\n");
sync();
/* Send signals to every process _except_ pid 1 */
- message(CONSOLE|LOG, "Sending SIGTERM to all processes.\n");
+ message(CONSOLE|LOG, "\rSending SIGTERM to all processes.\n");
kill(-1, SIGTERM);
sleep(1);
sync();
- message(CONSOLE|LOG, "Sending SIGKILL to all processes.\n");
+ message(CONSOLE|LOG, "\rSending SIGKILL to all processes.\n");
kill(-1, SIGKILL);
sleep(1);
}
}
+static void exec_signal(int sig)
+{
+ 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, "\rTrying to re-exec %s\n", a->command);
+ execl(a->command, a->command, NULL);
+
+ message(CONSOLE|LOG, "\rexec of '%s' failed: %s\n",
+ a->command, sys_errlist[errno]);
+ sync();
+ sleep(2);
+ init_reboot(RB_HALT_SYSTEM);
+ loop_forever();
+ }
+ }
+}
+
static void halt_signal(int sig)
{
shutdown_system();
message(CONSOLE|LOG,
- "The system is halted. Press %s or turn off power\n",
- (secondConsole == NULL) /* serial console */
- ? "Reset" : "CTRL-ALT-DEL");
+#if #cpu(s390)
+ /* Seems the s390 console is Wierd(tm). */
+ "\rThe system is halted. You may reboot now.\n"
+#else
+ /* secondConsole is NULL for a serial console */
+ "\rThe system is halted. Press %s or turn off power\n",
+ (secondConsole == NULL)? "Reset" : "CTRL-ALT-DEL"
+#endif
+ );
sync();
/* allow time for last message to reach serial console */
static void reboot_signal(int sig)
{
shutdown_system();
- message(CONSOLE|LOG, "Please stand by while rebooting the system.\n");
+ message(CONSOLE|LOG, "\rPlease stand by while rebooting the system.\n");
sync();
/* allow time for last message to reach serial console */
run_actions(CTRLALTDEL);
}
+/* The SIGSTOP & SIGTSTP handler */
+static void stop_handler(int sig)
+{
+ int saved_errno = errno;
+
+ got_cont = 0;
+ while(!got_cont) pause();
+ got_cont = 0;
+ errno = saved_errno;
+}
+
+/* The SIGCONT handler */
+static void cont_handler(int sig)
+{
+ got_cont = 1;
+}
+
#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) {
- message(LOG | CONSOLE, "Memory allocation failure\n");
+ new_action = calloc((size_t) (1), sizeof(struct init_action));
+ if (!new_action) {
+ message(LOG | CONSOLE, "\rMemory 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;
#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;
/* 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_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
/* Separate the ID field from the runlevels */
runlev = strchr(id, ':');
if (runlev == NULL || *(runlev + 1) == '\0') {
- message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
+ message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead);
continue;
} else {
*runlev = '\0';
/* Separate the runlevels from the action */
action = strchr(runlev, ':');
if (action == NULL || *(action + 1) == '\0') {
- message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
+ message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead);
continue;
} else {
*action = '\0';
++action;
}
- /* Separate the action from the process */
- process = strchr(action, ':');
- if (process == NULL || *(process + 1) == '\0') {
- message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
+ /* Separate the action from the command */
+ command = strchr(action, ':');
+ if (command == NULL || *(command + 1) == '\0') {
+ message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead);
continue;
} else {
- *process = '\0';
- ++process;
+ *command = '\0';
+ ++command;
}
/* Ok, now process it */
strncat(tmpConsole, id, 200);
id = tmpConsole;
}
- new_initAction(a->action, process, id);
+ new_init_action(a->action, command, id);
foundIt = TRUE;
}
a++;
continue;
else {
/* Choke on an unknown action */
- message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
+ message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead);
}
}
return;
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");
+ if (!pid || *pid<=0) {
+ pid = find_pid_by_name("linuxrc");
+ if (!pid || *pid<=0)
+ error_msg_and_die("no process killed");
+ }
+ kill(*pid, SIGHUP);
+ exit(0);
+ }
+
#ifndef DEBUG_INIT
/* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
if (getpid() != 1
}
/* Set up sig handlers -- be sure to
* clear all of these in run() */
+ 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);
+ signal(SIGTSTP, stop_handler);
/* Turn off rebooting via CTL-ALT-DEL -- we get a
* SIGINT on CAD so we can shut things down gracefully... */
putenv("PATH="_PATH_STDPATH);
/* Hello world */
-#ifndef DEBUG_INIT
- message(
-#if ! defined CONFIG_FEATURE_EXTRA_QUIET
- CONSOLE|
-#endif
- LOG,
- "init started: %s\n", full_version);
-#else
- message(
-#if ! defined CONFIG_FEATURE_EXTRA_QUIET
- CONSOLE|
-#endif
- LOG,
- "init(%d) started: %s\n", getpid(), full_version);
-#endif
-
+ message(MAYBE_CONSOLE|LOG, "\rinit started: %s\n", full_version);
/* Make sure there is enough memory to do something useful. */
check_memory();
!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 */
/* 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, "\rNo 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);
}
}
projects / oweals / busybox.git / blobdiff