* 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>
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Adjusted by so many folks, it's impossible to keep track.
*
* This program is free software; you can redistribute it and/or modify
*
*/
-/* Turn this on to disable all the dangerous
+/* Turn this on to disable all the dangerous
rebooting stuff when debugging.
#define DEBUG_INIT
*/
#include <sys/mount.h>
#include <sys/types.h>
#include <sys/wait.h>
+#include <sys/reboot.h>
#include "busybox.h"
+
+#include "init_shared.h"
+
+
#ifdef CONFIG_SYSLOGD
# include <sys/syslog.h>
#endif
-#if defined(__UCLIBC__) && !defined(__UCLIBC_HAS_MMU__)
-#define fork vfork
-#endif
#define INIT_BUFFS_SIZE 256
/* From <linux/serial.h> */
struct serial_struct {
- int type;
- int line;
- int port;
- int irq;
- int flags;
- int xmit_fifo_size;
- int custom_divisor;
- int baud_base;
- unsigned short close_delay;
- char reserved_char[2];
- int hub6;
- unsigned short closing_wait; /* time to wait before closing */
- unsigned short closing_wait2; /* no longer used... */
- int reserved[4];
+ int type;
+ int line;
+ unsigned int port;
+ int irq;
+ int flags;
+ int xmit_fifo_size;
+ int custom_divisor;
+ int baud_base;
+ unsigned short close_delay;
+ char io_type;
+ char reserved_char[1];
+ int hub6;
+ unsigned short closing_wait; /* time to wait before closing */
+ unsigned short closing_wait2; /* no longer used... */
+ unsigned char *iomem_base;
+ unsigned short iomem_reg_shift;
+ unsigned int port_high;
+ unsigned long iomap_base; /* cookie passed into ioremap */
+ int reserved[1];
};
-#if (__GNU_LIBRARY__ > 5) || defined(__dietlibc__)
-#include <sys/reboot.h>
-#define init_reboot(magic) reboot(magic)
-#else
-#define init_reboot(magic) reboot(0xfee1dead, 672274793, magic)
-#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
+ * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called
* before processes are spawned to set core file size as unlimited.
* This is for debugging only. Don't use this is production, unless
* you want core dumps lying about....
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
-#if __GNU_LIBRARY__ > 5
-#include <sys/kdaemon.h>
-#else
-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 */
#ifndef INIT_SCRIPT
#define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */
#define MAXENV 16 /* Number of env. vars */
+#define CONSOLE_BUFF_SIZE 32
+
/* Allowed init action types */
#define SYSINIT 0x001
#define RESPAWN 0x002
struct init_action {
pid_t pid;
char command[INIT_BUFFS_SIZE];
- char terminal[INIT_BUFFS_SIZE];
+ char terminal[CONSOLE_BUFF_SIZE];
struct init_action *next;
int action;
};
/* Static variables */
static struct init_action *init_action_list = NULL;
-static int kernelVersion = 0;
-static char termType[32] = "TERM=linux";
-static char console[32] = _PATH_CONSOLE;
+static char console[CONSOLE_BUFF_SIZE] = _PATH_CONSOLE;
#ifndef CONFIG_SYSLOGD
static char *log = VC_5;
static const int RB_AUTOBOOT = 0x01234567;
#endif
+static const char * const environment[] = {
+ "HOME=/",
+ "PATH=" _PATH_STDPATH,
+ "SHELL=/bin/sh",
+ "USER=root",
+ NULL
+};
+
/* Function prototypes */
static void delete_init_action(struct init_action *a);
-static int waitfor(struct init_action *a);
+static int waitfor(const struct init_action *a);
+static void halt_signal(int sig);
static void loop_forever(void)
/* Print a message to the specified device.
* Device may be bitwise-or'd from LOG | CONSOLE */
-#ifdef DEBUG_INIT
-static inline messageND(int device, char *fmt, ...)
+#ifndef DEBUG_INIT
+static inline void messageD(int device, const char *fmt, ...)
{
}
#else
-#define messageND message
+#define messageD message
#endif
-static void message(int device, char *fmt, ...)
+static void message(int device, const char *fmt, ...)
__attribute__ ((format(printf, 2, 3)));
-static void message(int device, char *fmt, ...)
+static void message(int device, const char *fmt, ...)
{
va_list arguments;
- int fd;
+ int l;
+ char msg[1024];
+#ifndef CONFIG_SYSLOGD
+ static int log_fd = -1;
+#endif
-#ifdef CONFIG_SYSLOGD
+ msg[0] = '\r';
+ va_start(arguments, fmt);
+ l = vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments) + 1;
+ va_end(arguments);
+#ifdef CONFIG_SYSLOGD
/* Log the message to syslogd */
if (device & LOG) {
- char msg[1024];
-
- va_start(arguments, fmt);
- vsnprintf(msg, sizeof(msg), fmt, arguments);
- va_end(arguments);
- syslog_msg(LOG_USER, LOG_INFO, msg);
+ /* don`t out "\r\n" */
+ openlog(bb_applet_name, 0, LOG_DAEMON);
+ syslog(LOG_INFO, "%s", msg);
+ closelog();
}
+
+ msg[l++] = '\n';
+ msg[l] = 0;
#else
- static int log_fd = -1;
+ msg[l++] = '\n';
+ msg[l] = 0;
/* Take full control of the log tty, and never close it.
* It's mine, all mine! Muhahahaha! */
if (log_fd < 0) {
- if ((log_fd = device_open(log, O_RDWR | O_NDELAY)) < 0) {
+ if ((log_fd = device_open(log, O_RDWR | O_NDELAY | O_NOCTTY)) < 0) {
log_fd = -2;
- fprintf(stderr, "Bummer, can't write to log on %s!\n", log);
+ bb_error_msg("Bummer, can't write to log on %s!", log);
device = CONSOLE;
+ } else {
+ fcntl(log_fd, F_SETFD, FD_CLOEXEC);
}
}
if ((device & LOG) && (log_fd >= 0)) {
- va_start(arguments, fmt);
- vdprintf(log_fd, fmt, arguments);
- va_end(arguments);
+ bb_full_write(log_fd, msg, l);
}
#endif
if (device & CONSOLE) {
+ int fd = device_open(_PATH_CONSOLE,
+ O_WRONLY | O_NOCTTY | O_NDELAY);
/* 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) {
- va_start(arguments, fmt);
- vdprintf(fd, fmt, arguments);
- va_end(arguments);
+ if (fd >= 0) {
+ bb_full_write(fd, msg, l);
close(fd);
+#ifdef DEBUG_INIT
+ /* all descriptors may be closed */
} else {
- fprintf(stderr, "Bummer, can't print: ");
+ bb_error_msg("Bummer, can't print: ");
va_start(arguments, fmt);
vfprintf(stderr, fmt, arguments);
va_end(arguments);
+#endif
}
}
}
/* How much memory does this machine have?
Units are kBytes to avoid overflow on 4GB machines */
-static int check_free_memory(void)
+static unsigned int check_free_memory(void)
{
struct sysinfo info;
unsigned int result, u, s = 10;
if (sysinfo(&info) != 0) {
- perror_msg("Error checking free memory");
+ bb_perror_msg("Error checking free memory");
return -1;
}
s--;
}
result = (info.totalram >> s) + (info.totalswap >> s);
- result = result * u;
- if (result < 0)
- result = INT_MAX;
- return result;
+ if (((unsigned long long)result * (unsigned long long)u) > UINT_MAX) {
+ return(UINT_MAX);
+ } else {
+ return(result * u);
+ }
}
static void console_init(void)
{
int fd;
- int tried_devcons = 0;
- int tried_vtprimary = 0;
+ int tried = 0;
struct vt_stat vt;
struct serial_struct sr;
char *s;
- if ((s = getenv("TERM")) != NULL) {
- snprintf(termType, sizeof(termType) - 1, "TERM=%s", s);
- }
-
- if ((s = getenv("CONSOLE")) != NULL) {
+ if ((s = getenv("CONSOLE")) != NULL || (s = getenv("console")) != NULL) {
safe_strncpy(console, s, sizeof(console));
- }
#if #cpu(sparc)
- /* sparc kernel supports console=tty[ab] parameter which is also
+ /* sparc kernel supports console=tty[ab] parameter which is also
* passed to init, so catch it here */
- else if ((s = getenv("console")) != NULL) {
/* remap tty[ab] to /dev/ttyS[01] */
if (strcmp(s, "ttya") == 0)
safe_strncpy(console, SC_0, sizeof(console));
else if (strcmp(s, "ttyb") == 0)
safe_strncpy(console, SC_1, sizeof(console));
- }
#endif
- else {
+ } else {
/* 2.2 kernels: identify the real console backend and try to use it */
if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
/* this is a serial console */
snprintf(console, sizeof(console) - 1, VC_FORMAT, vt.v_active);
} else {
safe_strncpy(console, _PATH_CONSOLE, sizeof(console));
- tried_devcons++;
+ tried++;
}
}
- while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
- /* Can't open selected console -- try /dev/console */
- if (!tried_devcons) {
- tried_devcons++;
- safe_strncpy(console, _PATH_CONSOLE, sizeof(console));
- continue;
- }
- /* Can't open selected console -- try vt1 */
- if (!tried_vtprimary) {
- tried_vtprimary++;
- safe_strncpy(console, VC_1, sizeof(console));
- continue;
- }
- break;
+ while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0 && tried < 2) {
+ /* Can't open selected console -- try
+ logical system console and VT_MASTER */
+ safe_strncpy(console, (tried == 0 ? _PATH_CONSOLE : CURRENT_VC),
+ sizeof(console));
+ tried++;
}
if (fd < 0) {
/* Perhaps we should panic here? */
+#ifndef CONFIG_SYSLOGD
+ log =
+#endif
safe_strncpy(console, "/dev/null", sizeof(console));
} else {
+ s = getenv("TERM");
/* check for serial console */
- if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
+ if (ioctl(fd, TIOCGSERIAL, &sr) == 0) {
/* Force the TERM setting to vt102 for serial console --
* if TERM is set to linux (the default) */
- if (strcmp(termType, "TERM=linux") == 0)
- safe_strncpy(termType, "TERM=vt102", sizeof(termType));
+ if (s == NULL || strcmp(s, "linux") == 0)
+ putenv("TERM=vt102");
+#ifndef CONFIG_SYSLOGD
+ log = console;
+#endif
+ } else {
+ if (s == NULL)
+ putenv("TERM=linux");
}
close(fd);
}
- message(LOG, "console=%s\n", console);
+ messageD(LOG, "console=%s", console);
}
static void fixup_argv(int argc, char **argv, char *new_argv0)
}
}
-/* 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)
-{
- struct stat statBuf;
-
- 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
-
- goodnight:
- message(CONSOLE, "\rSorry, your computer does not have enough memory.\n");
- loop_forever();
-}
-
-static pid_t run(struct init_action *a)
+static pid_t run(const struct init_action *a)
{
struct stat sb;
- int i, j, junk;
+ int i, junk;
pid_t pid, pgrp, tmp_pid;
char *s, *tmpCmd, *cmd[INIT_BUFFS_SIZE], *cmdpath;
char buf[INIT_BUFFS_SIZE + 6]; /* INIT_BUFFS_SIZE+strlen("exec ")+1 */
sigset_t nmask, omask;
- char *environment[MAXENV + 1] = {
- termType,
- "HOME=/",
- "PATH=" _PATH_STDPATH,
- "SHELL=" SHELL,
- "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++) {
- for (j = 0; environment[j]; j++) {
- s = strchr(environment[j], '=');
- if (!strncmp(environ[i], environment[j], s - environment[j]))
- break;
- }
- if (!environment[j]) {
- environment[j++] = environ[i];
- environment[j] = NULL;
- }
- }
-
/* Block sigchild while forking. */
sigemptyset(&nmask);
sigaddset(&nmask, SIGCHLD);
signal(SIGTSTP, SIG_DFL);
/* Create a new session and make ourself the process
- * group leader for non-interactive jobs */
- if ((a->action & (RESPAWN)) == 0)
- setsid();
+ * group leader */
+ setsid();
/* Open the new terminal device */
- if ((device_open(a->terminal, O_RDWR | O_NOCTTY)) < 0) {
+ if ((device_open(a->terminal, O_RDWR)) < 0) {
if (stat(a->terminal, &sb) != 0) {
- message(LOG | CONSOLE, "\rdevice '%s' does not exist.\n",
+ message(LOG | CONSOLE, "device '%s' does not exist.",
a->terminal);
_exit(1);
}
- message(LOG | CONSOLE, "\rBummer, can't open %s\n", a->terminal);
+ message(LOG | CONSOLE, "Bummer, can't open %s", a->terminal);
_exit(1);
}
- /* Non-interactive jobs should not get a controling tty */
- if ((a->action & (RESPAWN)) == 0)
- (void) ioctl(0, TIOCSCTTY, 0);
-
/* Make sure the terminal will act fairly normal for us */
set_term(0);
/* Setup stdout, stderr for the new process so
dup(0);
dup(0);
- /* For interactive jobs, create a new session
- * and become the process group leader */
- if ((a->action & (RESPAWN)))
- setsid();
-
/* If the init Action requires us to wait, then force the
* supplied terminal to be the controlling tty. */
if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) {
/* Now fork off another process to just hang around */
if ((pid = fork()) < 0) {
- message(LOG | CONSOLE, "Can't fork!\n");
+ message(LOG | CONSOLE, "Can't fork!");
_exit(1);
}
signal(SIGCHLD, SIG_DFL);
/* Wait for child to exit */
- while ((tmp_pid = waitpid(pid, &junk, 0)) != pid);
+ while ((tmp_pid = waitpid(pid, &junk, 0)) != pid) {
+ if (tmp_pid == -1 && errno == ECHILD) {
+ break;
+ }
+ /* FIXME handle other errors */
+ }
/* See if stealing the controlling tty back is necessary */
pgrp = tcgetpgrp(0);
/* Use a temporary process to steal the controlling tty. */
if ((pid = fork()) < 0) {
- message(LOG | CONSOLE, "\rCan't fork!\n");
+ message(LOG | CONSOLE, "Can't fork!");
_exit(1);
}
if (pid == 0) {
/* See if any special /bin/sh requiring characters are present */
if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
- cmd[0] = SHELL;
+ cmd[0] = (char *)DEFAULT_SHELL;
cmd[1] = "-c";
- strcat(strcpy(buf, "exec "), a->command);
- cmd[2] = buf;
+ cmd[2] = strcat(strcpy(buf, "exec "), a->command);
cmd[3] = NULL;
} else {
/* Convert command (char*) into cmd (char**, one word per string) */
/*
Interactive shells want to see a dash in argv[0]. This
- typically is handled by login, argv will be setup this
- way if a dash appears at the front of the command path
+ typically is handled by login, argv will be setup this
+ way if a dash appears at the front of the command path
(like "-/bin/sh").
*/
++cmdpath;
/* find the last component in the command pathname */
- s = get_last_path_component(cmdpath);
+ s = bb_get_last_path_component(cmdpath);
/* make a new argv[0] */
if ((cmd[0] = malloc(strlen(s) + 2)) == NULL) {
- message(LOG | CONSOLE, "malloc failed");
+ message(LOG | CONSOLE, bb_msg_memory_exhausted);
cmd[0] = cmdpath;
} else {
cmd[0][0] = '-';
}
}
+#if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__)
if (a->action & ASKFIRST) {
+ char c;
/*
* Save memory by not exec-ing anything large (like a shell)
* before the user wants it. This is critical if swap is not
* enabled and the system has low memory. Generally this will
* be run on the second virtual console, and the first will
- * be allowed to start a shell or whatever an init script
+ * be allowed to start a shell or whatever an init script
* specifies.
*/
- messageND(LOG,
- "Waiting for enter to start '%s' (pid %d, terminal %s)\n",
+ messageD(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);
+ bb_full_write(1, press_enter, sizeof(press_enter) - 1);
+ while(read(0, &c, 1) == 1 && c != '\n')
+ ;
}
+#endif
/* Log the process name and args */
- messageND(LOG, "Starting pid %d, console %s: '%s'\n",
+ message(LOG, "Starting pid %d, console %s: '%s'",
getpid(), a->terminal, cmdpath);
#if defined CONFIG_FEATURE_INIT_COREDUMPS
}
#endif
- /* Now run it. The new program will take over this PID,
+ /* Now run it. The new program will take over this PID,
* so nothing further in init.c should be run. */
- execve(cmdpath, cmd, environment);
+ execv(cmdpath, cmd);
/* We're still here? Some error happened. */
- message(LOG | CONSOLE, "\rBummer, could not run '%s': %s\n", cmdpath,
- strerror(errno));
+ message(LOG | CONSOLE, "Bummer, could not run '%s': %m", cmdpath);
_exit(-1);
}
sigprocmask(SIG_SETMASK, &omask, NULL);
return pid;
}
-static int waitfor(struct init_action *a)
+static int waitfor(const struct init_action *a)
{
int pid;
int status, wpid;
pid = run(a);
while (1) {
- wpid = wait(&status);
- if (wpid > 0 && wpid != pid) {
- continue;
- }
+ wpid = waitpid(pid,&status,0);
if (wpid == pid)
break;
+ if (wpid == -1 && errno == ECHILD) {
+ /* we missed its termination */
+ break;
+ }
+ /* FIXME other errors should maybe trigger an error, but allow
+ * the program to continue */
}
return wpid;
}
for (a = init_action_list; a; a = tmp) {
tmp = a->next;
if (a->action == action) {
- if (a->
- action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) {
+ if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) {
waitfor(a);
delete_init_action(a);
} else if (a->action & ONCE) {
}
}
-
#ifndef DEBUG_INIT
+static void init_reboot(unsigned long magic)
+{
+ pid_t pid;
+ /* We have to fork here, since the kernel calls do_exit(0) in
+ * linux/kernel/sys.c, which can cause the machine to panic when
+ * the init process is killed.... */
+ if ((pid = fork()) == 0) {
+ reboot(magic);
+ _exit(0);
+ }
+ waitpid (pid, NULL, 0);
+}
+
static void shutdown_system(void)
{
sigset_t block_signals;
/* Allow Ctrl-Alt-Del to reboot system. */
init_reboot(RB_ENABLE_CAD);
- message(CONSOLE | LOG, "\n\rThe system is going down NOW !!\n");
+ message(CONSOLE | LOG, "The system is going down NOW !!");
sync();
/* Send signals to every process _except_ pid 1 */
- message(CONSOLE | LOG, "\rSending SIGTERM to all processes.\n");
+ message(CONSOLE | LOG, "Sending SIGTERM to all processes.");
kill(-1, SIGTERM);
sleep(1);
sync();
- message(CONSOLE | LOG, "\rSending SIGKILL to all processes.\n");
+ message(CONSOLE | LOG, "Sending SIGKILL to all processes.");
kill(-1, SIGKILL);
sleep(1);
sync();
- if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2, 2, 11)) {
- /* bdflush, kupdate not needed for kernels >2.2.11 */
- bdflush(1, 0);
- sync();
- }
}
static void exec_signal(int sig)
for (a = init_action_list; a; a = tmp) {
tmp = a->next;
if (a->action & RESTART) {
+ struct stat sb;
+
shutdown_system();
/* unblock all signals, blocked in shutdown_system() */
sigaddset(&unblock_signals, SIGTSTP);
sigprocmask(SIG_UNBLOCK, &unblock_signals, NULL);
- message(CONSOLE | LOG, "\rTrying to re-exec %s\n", a->command);
+ /* Close whatever files are open. */
+ close(0);
+ close(1);
+ close(2);
+
+ /* Open the new terminal device */
+ if ((device_open(a->terminal, O_RDWR)) < 0) {
+ if (stat(a->terminal, &sb) != 0) {
+ message(LOG | CONSOLE, "device '%s' does not exist.", a->terminal);
+ } else {
+ message(LOG | CONSOLE, "Bummer, can't open %s", a->terminal);
+ }
+ halt_signal(SIGUSR1);
+ }
+
+ /* Make sure the terminal will act fairly normal for us */
+ set_term(0);
+ /* Setup stdout, stderr on the supplied terminal */
+ dup(0);
+ dup(0);
+
+ messageD(CONSOLE | LOG, "Trying to re-exec %s", a->command);
execl(a->command, a->command, NULL);
- message(CONSOLE | LOG, "\rexec of '%s' failed: %s\n",
- a->command, strerror(errno));
+ message(CONSOLE | LOG, "exec of '%s' failed: %m",
+ a->command);
sync();
sleep(2);
init_reboot(RB_HALT_SYSTEM);
message(CONSOLE | LOG,
#if #cpu(s390)
/* Seems the s390 console is Wierd(tm). */
- "\rThe system is halted. You may reboot now.\n"
+ "The system is halted. You may reboot now."
#else
- "\rThe system is halted. Press Reset or turn off power\n"
+ "The system is halted. Press Reset or turn off power"
#endif
);
sync();
/* allow time for last message to reach serial console */
sleep(2);
- if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2, 2, 0))
+ if (sig == SIGUSR2)
init_reboot(RB_POWER_OFF);
else
init_reboot(RB_HALT_SYSTEM);
static void reboot_signal(int sig)
{
shutdown_system();
- message(CONSOLE | LOG, "\rPlease stand by while rebooting the system.\n");
+ message(CONSOLE | LOG, "Please stand by while rebooting the system.");
sync();
/* allow time for last message to reach serial console */
#endif /* ! DEBUG_INIT */
-static void new_init_action(int action, char *command, char *cons)
+static void new_init_action(int action, const char *command, const char *cons)
{
struct init_action *new_action, *a;
new_action = calloc((size_t) (1), sizeof(struct init_action));
if (!new_action) {
- message(LOG | CONSOLE, "\rMemory allocation failure\n");
+ message(LOG | CONSOLE, "Memory allocation failure");
loop_forever();
}
/* Append to the end of the list */
- for (a = init_action_list; a && a->next; a = a->next);
+ for (a = init_action_list; a && a->next; a = a->next) {
+ /* don't enter action if it's already in the list */
+ if ((strcmp(a->command, command) == 0) &&
+ (strcmp(a->terminal, cons) ==0)) {
+ free(new_action);
+ return;
+ }
+ }
if (a) {
a->next = new_action;
} else {
strcpy(new_action->command, command);
new_action->action = action;
strcpy(new_action->terminal, cons);
+#if 0 /* calloc zeroed always */
new_action->pid = 0;
-/* message(LOG|CONSOLE, "command='%s' action='%d' terminal='%s'\n",
- new_action->command, new_action->action, new_action->terminal); */
+#endif
+ messageD(LOG|CONSOLE, "command='%s' action='%d' terminal='%s'\n",
+ new_action->command, new_action->action, new_action->terminal);
}
static void delete_init_action(struct init_action *action)
}
}
+/* 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)
+{
+ struct stat statBuf;
+
+ if (check_free_memory() > 1000)
+ return;
+
+#if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__)
+ if (stat("/etc/fstab", &statBuf) == 0) {
+ /* swapon -a requires /proc typically */
+ new_init_action(SYSINIT, "/bin/mount -t proc proc /proc", "");
+ /* Try to turn on swap */
+ new_init_action(SYSINIT, "/sbin/swapon -a", "");
+ run_actions(SYSINIT); /* wait and removing */
+ if (check_free_memory() < 1000)
+ goto goodnight;
+ } else
+ goto goodnight;
+ return;
+#endif
+
+ goodnight:
+ message(CONSOLE, "Sorry, your computer does not have enough memory.");
+ loop_forever();
+}
+
/* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined,
* then parse_inittab() simply adds in some default
- * actions(i.e., runs INIT_SCRIPT and then starts a pair
- * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB
- * _is_ defined, but /etc/inittab is missing, this
+ * actions(i.e., runs INIT_SCRIPT and then starts a pair
+ * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB
+ * _is_ defined, but /etc/inittab is missing, this
* results in the same set of default behaviors.
*/
static void parse_inittab(void)
{
#ifdef CONFIG_FEATURE_USE_INITTAB
FILE *file;
- char buf[INIT_BUFFS_SIZE], lineAsRead[INIT_BUFFS_SIZE],
- tmpConsole[INIT_BUFFS_SIZE];
+ char buf[INIT_BUFFS_SIZE], lineAsRead[INIT_BUFFS_SIZE];
+ char tmpConsole[CONSOLE_BUFF_SIZE];
char *id, *runlev, *action, *command, *eol;
const struct init_action_type *a = actions;
- int foundIt;
file = fopen(INITTAB, "r");
/* No inittab file -- set up some default behavior */
#endif
/* Reboot on Ctrl-Alt-Del */
- new_init_action(CTRLALTDEL, "/sbin/reboot", console);
+ new_init_action(CTRLALTDEL, "/sbin/reboot", "");
/* Umount all filesystems on halt/reboot */
- new_init_action(SHUTDOWN, "/bin/umount -a -r", console);
-#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__)
+ new_init_action(SHUTDOWN, "/bin/umount -a -r", "");
+#if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__)
/* Swapoff on halt/reboot */
- new_init_action(SHUTDOWN, "/sbin/swapoff -a", console);
+ new_init_action(SHUTDOWN, "/sbin/swapoff -a", "");
#endif
/* Prepare to restart init when a HUP is received */
- new_init_action(RESTART, "/sbin/init", console);
+ new_init_action(RESTART, "/sbin/init", "");
/* Askfirst shell on tty1-4 */
- new_init_action(ASKFIRST, LOGIN_SHELL, console);
- new_init_action(ASKFIRST, LOGIN_SHELL, VC_2);
- new_init_action(ASKFIRST, LOGIN_SHELL, VC_3);
- new_init_action(ASKFIRST, LOGIN_SHELL, VC_4);
+ new_init_action(ASKFIRST, bb_default_login_shell, "");
+ new_init_action(ASKFIRST, bb_default_login_shell, VC_2);
+ new_init_action(ASKFIRST, bb_default_login_shell, VC_3);
+ new_init_action(ASKFIRST, bb_default_login_shell, VC_4);
/* sysinit */
- new_init_action(SYSINIT, INIT_SCRIPT, console);
+ new_init_action(SYSINIT, INIT_SCRIPT, "");
return;
#ifdef CONFIG_FEATURE_USE_INITTAB
}
while (fgets(buf, INIT_BUFFS_SIZE, file) != NULL) {
- foundIt = FALSE;
/* Skip leading spaces */
for (id = buf; *id == ' ' || *id == '\t'; id++);
/* Separate the ID field from the runlevels */
runlev = strchr(id, ':');
if (runlev == NULL || *(runlev + 1) == '\0') {
- message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead);
+ message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead);
continue;
} else {
*runlev = '\0';
/* Separate the runlevels from the action */
action = strchr(runlev, ':');
if (action == NULL || *(action + 1) == '\0') {
- message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead);
+ message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead);
continue;
} else {
*action = '\0';
/* Separate the action from the command */
command = strchr(action, ':');
if (command == NULL || *(command + 1) == '\0') {
- message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead);
+ message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead);
continue;
} else {
*command = '\0';
}
/* Ok, now process it */
- a = actions;
- while (a->name != 0) {
+ for (a = actions; a->name != 0; a++) {
if (strcmp(a->name, action) == 0) {
if (*id != '\0') {
+ if(strncmp(id, "/dev/", 5) == 0)
+ id += 5;
strcpy(tmpConsole, "/dev/");
- strncat(tmpConsole, id, INIT_BUFFS_SIZE - 6);
+ safe_strncpy(tmpConsole + 5, id,
+ CONSOLE_BUFF_SIZE - 5);
id = tmpConsole;
}
new_init_action(a->action, command, id);
- foundIt = TRUE;
+ break;
}
- a++;
}
- if (foundIt == TRUE)
- continue;
- else {
+ if (a->name == 0) {
/* Choke on an unknown action */
- message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead);
+ message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead);
}
}
fclose(file);
#endif /* CONFIG_FEATURE_USE_INITTAB */
}
-
-
+static void reload_signal(int sig)
+{
+ message(LOG, "Reloading /etc/inittab");
+ parse_inittab();
+ run_actions(RESPAWN);
+ return;
+}
+
extern int init_main(int argc, char **argv)
{
struct init_action *a;
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);
+ return kill_init(SIGHUP);
}
#ifndef DEBUG_INIT
/* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
if (getpid() != 1
#ifdef CONFIG_FEATURE_INITRD
- && strstr(applet_name, "linuxrc") == NULL
+ && strstr(bb_applet_name, "linuxrc") == NULL
#endif
) {
- show_usage();
+ bb_show_usage();
}
/* Set up sig handlers -- be sure to
* clear all of these in run() */
signal(SIGSTOP, stop_handler);
signal(SIGTSTP, stop_handler);
- /* Turn off rebooting via CTL-ALT-DEL -- we get a
+ /* Turn off rebooting via CTL-ALT-DEL -- we get a
* SIGINT on CAD so we can shut things down gracefully... */
init_reboot(RB_DISABLE_CAD);
#endif
- /* Figure out what kernel this is running */
- kernelVersion = get_kernel_revision();
-
/* Figure out where the default console should be */
console_init();
chdir("/");
setsid();
-
- /* Make sure PATH is set to something sane */
- putenv("PATH=" _PATH_STDPATH);
-
+ {
+ const char * const *e;
+ /* Make sure environs is set to something sane */
+ for(e = environment; *e; e++)
+ putenv((char *) *e);
+ }
/* Hello world */
- message(MAYBE_CONSOLE | LOG, "\rinit started: %s\n", full_version);
+ message(MAYBE_CONSOLE | LOG, "init started: %s", bb_msg_full_version);
/* Make sure there is enough memory to do something useful. */
check_memory();
/* Check if we are supposed to be in single user mode */
if (argc > 1 && (!strcmp(argv[1], "single") ||
!strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
- /* Ask first then start a shell on tty2-4 */
- new_init_action(ASKFIRST, LOGIN_SHELL, VC_2);
- new_init_action(ASKFIRST, LOGIN_SHELL, VC_3);
- new_init_action(ASKFIRST, LOGIN_SHELL, VC_4);
- /* Start a shell on tty1 */
- new_init_action(RESPAWN, LOGIN_SHELL, console);
+ /* Start a shell on console */
+ new_init_action(RESPAWN, bb_default_login_shell, "");
} else {
/* Not in single user mode -- see what inittab says */
/* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined,
* then parse_inittab() simply adds in some default
- * actions(i.e., runs INIT_SCRIPT and then starts a pair
+ * actions(i.e., runs INIT_SCRIPT and then starts a pair
* of "askfirst" shells */
parse_inittab();
}
/* Next run anything to be run only once */
run_actions(ONCE);
- /* If there is nothing else to do, stop */
- if (init_action_list == NULL) {
- message(LOG | CONSOLE,
- "\rNo more tasks for init -- sleeping forever.\n");
- loop_forever();
- }
+ /* Redefine SIGHUP to reread /etc/inittab */
+ signal(SIGHUP, reload_signal);
/* Now run the looping stuff for the rest of forever */
while (1) {
/* Wait for a child process to exit */
wpid = wait(&status);
- if (wpid > 0) {
+ while (wpid > 0) {
/* Find out who died and clean up their corpse */
for (a = init_action_list; a; a = a->next) {
if (a->pid == wpid) {
* restarted by run_actions() */
a->pid = 0;
message(LOG, "Process '%s' (pid %d) exited. "
- "Scheduling it for restart.\n", a->command, wpid);
+ "Scheduling it for restart.",
+ a->command, wpid);
}
}
+ /* see if anyone else is waiting to be reaped */
+ wpid = waitpid (-1, &status, WNOHANG);
}
}
}
projects / oweals / busybox.git / blobdiff