* 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
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-/* Turn this on to disable all the dangerous
- rebooting stuff when debugging.
-#define DEBUG_INIT
-*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
+#include "busybox.h"
#include <paths.h>
#include <signal.h>
-#include <stdarg.h>
-#include <string.h>
-#include <termios.h>
-#include <unistd.h>
-#include <limits.h>
-#include <sys/fcntl.h>
#include <sys/ioctl.h>
-#include <sys/mount.h>
-#include <sys/types.h>
#include <sys/wait.h>
-#include "busybox.h"
-
-#include "init_shared.h"
-
-
-#ifdef CONFIG_SYSLOGD
-# include <sys/syslog.h>
-#endif
-#if (__GNU_LIBRARY__ > 5) || defined(__dietlibc__)
#include <sys/reboot.h>
-#endif
-
-#if defined(__UCLIBC__) && !defined(__UCLIBC_HAS_MMU__)
-#define fork vfork
+#if ENABLE_FEATURE_INIT_SYSLOG
+# include <sys/syslog.h>
#endif
#define INIT_BUFFS_SIZE 256
-
-/* From <linux/vt.h> */
-struct vt_stat {
- unsigned short v_active; /* active vt */
- unsigned short v_signal; /* signal to send */
- unsigned short v_state; /* vt bitmask */
-};
-static const int VT_GETSTATE = 0x5603; /* get global vt state info */
-
-/* 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];
-};
-
+#define CONSOLE_NAME_SIZE 32
+#define MAXENV 16 /* Number of env. vars */
#ifndef _PATH_STDPATH
#define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
#endif
-#if defined CONFIG_FEATURE_INIT_COREDUMPS
+#if ENABLE_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 CORE_ENABLE_FLAG_FILE "/.init_enable_core"
#include <sys/resource.h>
-#include <sys/time.h>
#endif
-#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
-
-#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. */
#endif
-#define MAXENV 16 /* Number of env. vars */
-
-#define CONSOLE_BUFF_SIZE 32
-
/* Allowed init action types */
#define SYSINIT 0x001
#define RESPAWN 0x002
/* Set up a linked list of init_actions, to be read from inittab */
struct init_action {
- pid_t pid;
- char command[INIT_BUFFS_SIZE];
- char terminal[CONSOLE_BUFF_SIZE];
struct init_action *next;
int action;
+ pid_t pid;
+ char command[INIT_BUFFS_SIZE];
+ char terminal[CONSOLE_NAME_SIZE];
};
/* Static variables */
static struct init_action *init_action_list = NULL;
-static char console[CONSOLE_BUFF_SIZE] = _PATH_CONSOLE;
-#ifndef CONFIG_SYSLOGD
-static char *log = VC_5;
+#if !ENABLE_FEATURE_INIT_SYSLOG
+static const char *log_console = VC_5;
#endif
+#if !ENABLE_DEBUG_INIT
static sig_atomic_t got_cont = 0;
-static const int LOG = 0x1;
-static const int CONSOLE = 0x2;
+#endif
+
+enum {
+ L_LOG = 0x1,
+ L_CONSOLE = 0x2,
-#if defined CONFIG_FEATURE_EXTRA_QUIET
-static const int MAYBE_CONSOLE = 0x0;
+#if ENABLE_FEATURE_EXTRA_QUIET
+ MAYBE_CONSOLE = 0x0,
#else
-#define MAYBE_CONSOLE CONSOLE
+ MAYBE_CONSOLE = L_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;
+#ifndef RB_HALT_SYSTEM
+ RB_HALT_SYSTEM = 0xcdef0123, /* FIXME: this overflows enum */
+ RB_ENABLE_CAD = 0x89abcdef,
+ RB_DISABLE_CAD = 0,
+ RB_POWER_OFF = 0x4321fedc,
+ RB_AUTOBOOT = 0x01234567,
#endif
+};
static const char * const environment[] = {
"HOME=/",
"PATH=" _PATH_STDPATH,
- "SHELL=" SHELL,
+ "SHELL=/bin/sh",
"USER=root",
NULL
};
/* Function prototypes */
static void delete_init_action(struct init_action *a);
-static int waitfor(const struct init_action *a);
-
+static int waitfor(const struct init_action *a, pid_t pid);
+#if !ENABLE_DEBUG_INIT
+static void shutdown_signal(int sig);
+#endif
+#if !ENABLE_DEBUG_INIT
static void loop_forever(void)
{
while (1)
sleep(1);
}
+#endif
/* Print a message to the specified device.
- * Device may be bitwise-or'd from LOG | CONSOLE */
-#ifndef DEBUG_INIT
-static inline void messageD(int device, const char *fmt, ...)
-{
-}
-#else
+ * Device may be bitwise-or'd from L_LOG | L_CONSOLE */
+#if ENABLE_DEBUG_INIT
#define messageD message
+#else
+#define messageD(...) do {} while (0)
#endif
static void message(int device, const char *fmt, ...)
__attribute__ ((format(printf, 2, 3)));
static void message(int device, const char *fmt, ...)
{
- va_list arguments;
- int l;
- char msg[1024];
-#ifndef CONFIG_SYSLOGD
+#if !ENABLE_FEATURE_INIT_SYSLOG
static int log_fd = -1;
#endif
+ va_list arguments;
+ int l;
+ char msg[128];
+
msg[0] = '\r';
- va_start(arguments, fmt);
- l = vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments) + 1;
- va_end(arguments);
+ va_start(arguments, fmt);
+ vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments);
+ va_end(arguments);
+ msg[sizeof(msg) - 2] = '\0';
+ l = strlen(msg);
-#ifdef CONFIG_SYSLOGD
+#if ENABLE_FEATURE_INIT_SYSLOG
/* Log the message to syslogd */
- if (device & LOG) {
- /* don`t out "\r\n" */
- syslog_msg(LOG_DAEMON, LOG_INFO, msg + 1);
+ if (device & L_LOG) {
+ /* don't out "\r" */
+ openlog(applet_name, 0, LOG_DAEMON);
+ syslog(LOG_INFO, "init: %s", msg + 1);
+ closelog();
}
-
msg[l++] = '\n';
- msg[l] = 0;
+ msg[l] = '\0';
#else
-
msg[l++] = '\n';
- msg[l] = 0;
+ 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 | O_NOCTTY)) < 0) {
- log_fd = -2;
- bb_error_msg("Bummer, can't write to log on %s!", log);
- device = CONSOLE;
+ if (!log_console) {
+ log_fd = 2;
} else {
- fcntl(log_fd, F_SETFD, FD_CLOEXEC);
+ log_fd = device_open(log_console, O_WRONLY | O_NONBLOCK | O_NOCTTY);
+ if (log_fd < 0) {
+ bb_error_msg("can't log to %s", log_console);
+ device = L_CONSOLE;
+ } else {
+ fcntl(log_fd, F_SETFD, FD_CLOEXEC);
+ }
}
}
- if ((device & LOG) && (log_fd >= 0)) {
- bb_full_write(log_fd, msg, l);
+ if (device & L_LOG) {
+ full_write(log_fd, msg, l);
+ if (log_fd == 2)
+ return; /* don't print dup messages */
}
#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 >= 0) {
- bb_full_write(fd, msg, l);
- close(fd);
-#ifdef DEBUG_INIT
- /* all descriptors may be closed */
- } else {
- bb_error_msg("Bummer, can't print: ");
- va_start(arguments, fmt);
- vfprintf(stderr, fmt, arguments);
- va_end(arguments);
-#endif
- }
+ if (device & L_CONSOLE) {
+ /* Send console messages to console so people will see them. */
+ full_write(2, msg, l);
}
}
/* Set terminal settings to reasonable defaults */
-static void set_term(int fd)
+static void set_sane_term(void)
{
struct termios tty;
- tcgetattr(fd, &tty);
+ tcgetattr(STDIN_FILENO, &tty);
/* set control chars */
tty.c_cc[VINTR] = 3; /* C-c */
tty.c_cflag &= CBAUD | CBAUDEX | CSIZE | CSTOPB | PARENB | PARODD;
tty.c_cflag |= CREAD | HUPCL | CLOCAL;
-
/* input modes */
tty.c_iflag = ICRNL | IXON | IXOFF;
tty.c_lflag =
ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN;
- tcsetattr(fd, TCSANOW, &tty);
-}
-
-/* How much memory does this machine have?
- Units are kBytes to avoid overflow on 4GB machines */
-static int check_free_memory(void)
-{
- struct sysinfo info;
- unsigned int result, u, s = 10;
-
- if (sysinfo(&info) != 0) {
- bb_perror_msg("Error checking free memory");
- return -1;
- }
-
- /* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes.
- * Kernels 2.4.0 return info.mem_unit in bytes. */
- u = info.mem_unit;
- if (u == 0)
- u = 1;
- while ((u & 1) == 0 && s > 0) {
- u >>= 1;
- s--;
- }
- result = (info.totalram >> s) + (info.totalswap >> s);
- result = result * u;
- if (result < 0)
- result = INT_MAX;
- return result;
+ tcsetattr(STDIN_FILENO, TCSANOW, &tty);
}
+/* From <linux/serial.h> */
+struct serial_struct {
+ 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];
+ /* Paranoia (imagine 64bit kernel overwriting 32bit userspace stack) */
+ uint32_t bbox_reserved[16];
+};
static void console_init(void)
{
- int fd;
- int tried = 0;
- struct vt_stat vt;
struct serial_struct sr;
char *s;
- 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
- * passed to init, so catch it here */
- /* 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 {
- /* 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, SC_FORMAT, sr.line);
- } else if (ioctl(0, VT_GETSTATE, &vt) == 0) {
- /* this is linux virtual tty */
- snprintf(console, sizeof(console) - 1, VC_FORMAT, vt.v_active);
- } else {
- safe_strncpy(console, _PATH_CONSOLE, sizeof(console));
- tried++;
+ s = getenv("CONSOLE");
+ if (!s) s = getenv("console");
+ if (s) {
+ int fd = open(s, O_RDWR | O_NONBLOCK | O_NOCTTY);
+ if (fd >= 0) {
+ dup2(fd, 0);
+ dup2(fd, 1);
+ dup2(fd, 2);
+ while (fd > 2) close(fd--);
}
+ messageD(L_LOG, "console='%s'", s);
}
- 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(fd, TIOCGSERIAL, &sr) == 0) {
- /* Force the TERM setting to vt102 for serial console --
- * if TERM is set to linux (the default) */
- if (s == NULL || strcmp(s, "linux") == 0)
- putenv("TERM=vt102");
-#ifndef CONFIG_SYSLOGD
- log = console;
+ s = getenv("TERM");
+ if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
+ /* Force the TERM setting to vt102 for serial console --
+ * if TERM is set to linux (the default) */
+ if (!s || strcmp(s, "linux") == 0)
+ putenv((char*)"TERM=vt102");
+#if !ENABLE_FEATURE_INIT_SYSLOG
+ log_console = NULL;
#endif
- } else {
- if (s == NULL)
- putenv("TERM=linux");
- }
- close(fd);
- }
- messageD(LOG, "console=%s", console);
+ } else if (!s)
+ putenv((char*)"TERM=linux");
}
-static void fixup_argv(int argc, char **argv, char *new_argv0)
+static void fixup_argv(int argc, char **argv, const char *new_argv0)
{
int len;
/* Fix up argv[0] to be certain we claim to be init */
len = strlen(argv[0]);
- memset(argv[0], 0, len);
- safe_strncpy(argv[0], new_argv0, len + 1);
+ strncpy(argv[0], new_argv0, len);
/* Wipe argv[1]-argv[N] so they don't clutter the ps listing */
len = 1;
}
}
+/* Open the new terminal device */
+static void open_stdio_to_tty(const char* tty_name, int fail)
+{
+ /* empty tty_name means "use init's tty", else... */
+ if (tty_name[0]) {
+ int fd = device_open(tty_name, O_RDWR);
+ if (fd < 0) {
+ message(L_LOG | L_CONSOLE, "Can't open %s: %s",
+ tty_name, strerror(errno));
+ if (fail)
+ _exit(1);
+#if !ENABLE_DEBUG_INIT
+ shutdown_signal(SIGUSR1);
+#else
+ _exit(2);
+#endif
+ } else {
+ dup2(fd, 0);
+ dup2(fd, 1);
+ dup2(fd, 2);
+ if (fd > 2) close(fd);
+ }
+ }
+ set_sane_term();
+}
+
static pid_t run(const struct init_action *a)
{
- struct stat sb;
- int i, junk;
- pid_t pid, pgrp, tmp_pid;
- char *s, *tmpCmd, *cmd[INIT_BUFFS_SIZE], *cmdpath;
+ int i;
+ pid_t pid;
+ char *s, *tmpCmd, *cmdpath;
+ char *cmd[INIT_BUFFS_SIZE];
char buf[INIT_BUFFS_SIZE + 6]; /* INIT_BUFFS_SIZE+strlen("exec ")+1 */
sigset_t nmask, omask;
- static const char press_enter[] =
-#ifdef CUSTOMIZED_BANNER
-#include CUSTOMIZED_BANNER
-#endif
- "\nPlease press Enter to activate this console. ";
/* Block sigchild while forking. */
sigemptyset(&nmask);
sigaddset(&nmask, SIGCHLD);
sigprocmask(SIG_BLOCK, &nmask, &omask);
+ pid = fork();
+ sigprocmask(SIG_SETMASK, &omask, NULL);
- if ((pid = fork()) == 0) {
- /* Clean up */
- close(0);
- close(1);
- close(2);
- sigprocmask(SIG_SETMASK, &omask, NULL);
-
- /* Reset signal handlers that were set by the parent process */
- signal(SIGUSR1, SIG_DFL);
- signal(SIGUSR2, SIG_DFL);
- signal(SIGINT, SIG_DFL);
- signal(SIGTERM, SIG_DFL);
- signal(SIGHUP, SIG_DFL);
- signal(SIGCONT, SIG_DFL);
- signal(SIGSTOP, SIG_DFL);
- signal(SIGTSTP, SIG_DFL);
-
- /* Create a new session and make ourself the process
- * group leader */
- setsid();
+ if (pid)
+ return pid;
+
+ /* Reset signal handlers that were set by the parent process */
+ signal(SIGUSR1, SIG_DFL);
+ signal(SIGUSR2, SIG_DFL);
+ signal(SIGINT, SIG_DFL);
+ signal(SIGTERM, SIG_DFL);
+ signal(SIGHUP, SIG_DFL);
+ signal(SIGQUIT, SIG_DFL);
+ signal(SIGCONT, SIG_DFL);
+ signal(SIGSTOP, SIG_DFL);
+ signal(SIGTSTP, SIG_DFL);
+
+ /* Create a new session and make ourself the process
+ * group leader */
+ setsid();
- /* 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);
- _exit(1);
- }
- message(LOG | CONSOLE, "Bummer, can't open %s", a->terminal);
+ /* Open the new terminal device */
+ open_stdio_to_tty(a->terminal, 1);
+
+ /* 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(L_LOG | L_CONSOLE, "Can't fork");
_exit(1);
}
- /* Make sure the terminal will act fairly normal for us */
- set_term(0);
- /* Setup stdout, stderr for the new process so
- * they point to the supplied terminal */
- dup(0);
- dup(0);
+ if (pid > 0) {
- /* 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)) {
+ /* 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);
- /* Now fork off another process to just hang around */
+ waitfor(NULL, pid);
+ /* See if stealing the controlling tty back is necessary */
+ if (tcgetpgrp(0) != getpid())
+ _exit(0);
+
+ /* Use a temporary process to steal the controlling tty. */
if ((pid = fork()) < 0) {
- message(LOG | CONSOLE, "Can't fork!");
+ message(L_LOG | L_CONSOLE, "Can't fork");
_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);
-
- /* See if stealing the controlling tty back is necessary */
- pgrp = tcgetpgrp(0);
- if (pgrp != getpid())
- _exit(0);
-
- /* Use a temporary process to steal the controlling tty. */
- if ((pid = fork()) < 0) {
- message(LOG | CONSOLE, "Can't fork!");
- _exit(1);
- }
- if (pid == 0) {
- setsid();
- ioctl(0, TIOCSCTTY, 1);
- _exit(0);
- }
- while ((tmp_pid = waitpid(pid, &junk, 0)) != pid) {
- if (tmp_pid < 0 && errno == ECHILD)
- break;
- }
+ if (pid == 0) {
+ setsid();
+ ioctl(0, TIOCSCTTY, 1);
_exit(0);
}
-
- /* Now fall though to actually execute things */
- }
-
- /* See if any special /bin/sh requiring characters are present */
- if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
- cmd[0] = SHELL;
- cmd[1] = "-c";
- cmd[2] = strcat(strcpy(buf, "exec "), a->command);
- cmd[3] = NULL;
- } else {
- /* Convert command (char*) into cmd (char**, one word per string) */
- strcpy(buf, a->command);
- s = buf;
- for (tmpCmd = buf, i = 0; (tmpCmd = strsep(&s, " \t")) != NULL;) {
- if (*tmpCmd != '\0') {
- cmd[i] = tmpCmd;
- i++;
- }
- }
- cmd[i] = NULL;
+ waitfor(NULL, pid);
+ _exit(0);
}
- cmdpath = cmd[0];
-
- /*
- Interactive shells want to see a dash in argv[0]. This
- typically is handled by login, argv will be setup this
- way if a dash appears at the front of the command path
- (like "-/bin/sh").
- */
-
- if (*cmdpath == '-') {
-
- /* skip over the dash */
- ++cmdpath;
-
- /* find the last component in the command pathname */
- s = bb_get_last_path_component(cmdpath);
+ /* Now fall though to actually execute things */
+ }
- /* make a new argv[0] */
- if ((cmd[0] = malloc(strlen(s) + 2)) == NULL) {
- message(LOG | CONSOLE, bb_msg_memory_exhausted);
- cmd[0] = cmdpath;
- } else {
- cmd[0][0] = '-';
- strcpy(cmd[0] + 1, s);
+ /* See if any special /bin/sh requiring characters are present */
+ if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
+ cmd[0] = (char*)DEFAULT_SHELL;
+ cmd[1] = (char*)"-c";
+ cmd[2] = strcat(strcpy(buf, "exec "), a->command);
+ cmd[3] = NULL;
+ } else {
+ /* Convert command (char*) into cmd (char**, one word per string) */
+ strcpy(buf, a->command);
+ s = buf;
+ for (tmpCmd = buf, i = 0; (tmpCmd = strsep(&s, " \t")) != NULL;) {
+ if (*tmpCmd != '\0') {
+ cmd[i] = tmpCmd;
+ i++;
}
}
+ cmd[i] = NULL;
+ }
- 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
- * specifies.
- */
- messageD(LOG, "Waiting for enter to start '%s'"
- "(pid %d, terminal %s)\n",
- cmdpath, getpid(), a->terminal);
- bb_full_write(1, press_enter, sizeof(press_enter) - 1);
- while(read(0, &c, 1) == 1 && c != '\n')
- ;
+ cmdpath = cmd[0];
+
+ /*
+ * 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
+ * (like "-/bin/sh").
+ */
+ if (*cmdpath == '-') {
+ /* skip over the dash */
+ ++cmdpath;
+
+ /* find the last component in the command pathname */
+ s = bb_get_last_path_component(cmdpath);
+
+ /* make a new argv[0] */
+ if ((cmd[0] = malloc(strlen(s) + 2)) == NULL) {
+ message(L_LOG | L_CONSOLE, bb_msg_memory_exhausted);
+ cmd[0] = cmdpath;
+ } else {
+ cmd[0][0] = '-';
+ strcpy(cmd[0] + 1, s);
}
+#if ENABLE_FEATURE_INIT_SCTTY
+ /* Establish this process as session leader and
+ * (attempt) to make the tty (if any) a controlling tty.
+ */
+ setsid();
+ ioctl(0, TIOCSCTTY, 0 /*don't steal it*/);
+#endif
+ }
- /* Log the process name and args */
- message(LOG, "Starting pid %d, console %s: '%s'",
- getpid(), a->terminal, cmdpath);
+#if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__)
+ if (a->action & ASKFIRST) {
+ static const char press_enter[] =
+#ifdef CUSTOMIZED_BANNER
+#include CUSTOMIZED_BANNER
+#endif
+ "\nPlease press Enter to activate this console. ";
+ 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
+ * specifies.
+ */
+ messageD(L_LOG, "waiting for enter to start '%s'"
+ "(pid %d, tty '%s')\n",
+ cmdpath, getpid(), a->terminal);
+ full_write(1, press_enter, sizeof(press_enter) - 1);
+ while (read(0, &c, 1) == 1 && c != '\n')
+ ;
+ }
+#endif
+ /* Log the process name and args */
+ message(L_LOG, "starting pid %d, tty '%s': '%s'",
+ getpid(), a->terminal, cmdpath);
-#if defined CONFIG_FEATURE_INIT_COREDUMPS
+#if ENABLE_FEATURE_INIT_COREDUMPS
+ {
+ struct stat sb;
if (stat(CORE_ENABLE_FLAG_FILE, &sb) == 0) {
struct rlimit limit;
limit.rlim_max = RLIM_INFINITY;
setrlimit(RLIMIT_CORE, &limit);
}
-#endif
-
- /* Now run it. The new program will take over this PID,
- * so nothing further in init.c should be run. */
- execv(cmdpath, cmd);
-
- /* We're still here? Some error happened. */
- message(LOG | CONSOLE, "Bummer, could not run '%s': %m", cmdpath);
- _exit(-1);
}
- sigprocmask(SIG_SETMASK, &omask, NULL);
- return pid;
+#endif
+ /* Now run it. The new program will take over this PID,
+ * so nothing further in init.c should be run. */
+ BB_EXECVP(cmdpath, cmd);
+
+ /* We're still here? Some error happened. */
+ message(L_LOG | L_CONSOLE, "Cannot run '%s': %s",
+ cmdpath, strerror(errno));
+ _exit(-1);
}
-static int waitfor(const struct init_action *a)
+static int waitfor(const struct init_action *a, pid_t pid)
{
- int pid;
+ int runpid;
int status, wpid;
- pid = run(a);
+ runpid = (NULL == a)? pid : run(a);
while (1) {
- wpid = wait(&status);
- if (wpid > 0 && wpid != pid) {
- continue;
- }
- if (wpid == pid)
+ wpid = waitpid(runpid, &status, 0);
+ if (wpid == runpid)
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)) {
- waitfor(a);
+ /* a->terminal of "" means "init's console" */
+ if (a->terminal[0] && access(a->terminal, R_OK | W_OK)) {
+ delete_init_action(a);
+ } else if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) {
+ waitfor(a, 0);
delete_init_action(a);
} else if (a->action & ONCE) {
run(a);
}
}
-#ifndef DEBUG_INIT
+#if !ENABLE_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 machint to panic when
+ * linux/kernel/sys.c, which can cause the machine to panic when
* the init process is killed.... */
- if ((pid = fork()) == 0) {
-#if (__GNU_LIBRARY__ > 5) || defined(__dietlibc__)
+ pid = vfork();
+ if (pid == 0) { /* child */
reboot(magic);
-#else
- reboot(0xfee1dead, 672274793, magic);
-#endif
_exit(0);
}
- waitpid (pid, NULL, 0);
+ waitpid(pid, NULL, 0);
}
static void shutdown_system(void)
/* first disable all our signals */
sigemptyset(&block_signals);
sigaddset(&block_signals, SIGHUP);
+ sigaddset(&block_signals, SIGQUIT);
sigaddset(&block_signals, SIGCHLD);
sigaddset(&block_signals, SIGUSR1);
sigaddset(&block_signals, SIGUSR2);
sigaddset(&block_signals, SIGTSTP);
sigprocmask(SIG_BLOCK, &block_signals, NULL);
+ message(L_CONSOLE | L_LOG, "The system is going down NOW!");
+
/* Allow Ctrl-Alt-Del to reboot system. */
init_reboot(RB_ENABLE_CAD);
- message(CONSOLE | LOG, "The system is going down NOW !!");
- sync();
-
/* Send signals to every process _except_ pid 1 */
- message(CONSOLE | LOG, "Sending SIGTERM to all processes.");
+ message(L_CONSOLE | L_LOG, "Sending SIG%s to all processes", "TERM");
kill(-1, SIGTERM);
- sleep(1);
sync();
-
- message(CONSOLE | LOG, "Sending SIGKILL to all processes.");
- kill(-1, SIGKILL);
sleep(1);
+ message(L_CONSOLE | L_LOG, "Sending SIG%s to all processes", "KILL");
+ kill(-1, SIGKILL);
sync();
+ sleep(1);
}
-static void exec_signal(int sig)
+static void exec_signal(int sig ATTRIBUTE_UNUSED)
{
struct init_action *a, *tmp;
sigset_t unblock_signals;
/* unblock all signals, blocked in shutdown_system() */
sigemptyset(&unblock_signals);
sigaddset(&unblock_signals, SIGHUP);
+ sigaddset(&unblock_signals, SIGQUIT);
sigaddset(&unblock_signals, SIGCHLD);
sigaddset(&unblock_signals, SIGUSR1);
sigaddset(&unblock_signals, SIGUSR2);
sigaddset(&unblock_signals, SIGTSTP);
sigprocmask(SIG_UNBLOCK, &unblock_signals, NULL);
- messageD(CONSOLE | LOG, "Trying to re-exec %s", a->command);
- execl(a->command, a->command, NULL);
+ /* Open the new terminal device */
+ open_stdio_to_tty(a->terminal, 0);
+
+ messageD(L_CONSOLE | L_LOG, "Trying to re-exec %s", a->command);
+ BB_EXECLP(a->command, a->command, NULL);
- message(CONSOLE | LOG, "exec of '%s' failed: %m",
- a->command);
- sync();
+ message(L_CONSOLE | L_LOG, "Cannot run '%s': %s",
+ a->command, strerror(errno));
sleep(2);
init_reboot(RB_HALT_SYSTEM);
loop_forever();
}
}
-static void halt_signal(int sig)
+static void shutdown_signal(int sig)
{
- shutdown_system();
- message(CONSOLE | LOG,
-#if #cpu(s390)
- /* Seems the s390 console is Wierd(tm). */
- "The system is halted. You may reboot now."
-#else
- "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)
- init_reboot(RB_POWER_OFF);
- else
- init_reboot(RB_HALT_SYSTEM);
-
- loop_forever();
-}
+ const char *m;
+ int rb;
-static void reboot_signal(int sig)
-{
shutdown_system();
- message(CONSOLE | LOG, "Please stand by while rebooting the system.");
- sync();
+ m = "halt";
+ rb = RB_HALT_SYSTEM;
+ if (sig == SIGTERM) {
+ m = "reboot";
+ rb = RB_AUTOBOOT;
+ } else if (sig == SIGUSR2) {
+ m = "poweroff";
+ rb = RB_POWER_OFF;
+ }
+ message(L_CONSOLE | L_LOG, "Requesting system %s", m);
/* allow time for last message to reach serial console */
sleep(2);
-
- init_reboot(RB_AUTOBOOT);
-
+ init_reboot(rb);
loop_forever();
}
-static void ctrlaltdel_signal(int sig)
+static void ctrlaltdel_signal(int sig ATTRIBUTE_UNUSED)
{
run_actions(CTRLALTDEL);
}
/* The SIGSTOP & SIGTSTP handler */
-static void stop_handler(int sig)
+static void stop_handler(int sig ATTRIBUTE_UNUSED)
{
int saved_errno = errno;
}
/* The SIGCONT handler */
-static void cont_handler(int sig)
+static void cont_handler(int sig ATTRIBUTE_UNUSED)
{
got_cont = 1;
}
-#endif /* ! DEBUG_INIT */
+#endif /* !ENABLE_DEBUG_INIT */
-static void new_init_action(int action, char *command, const char *cons)
+static void new_init_action(int action, const char *command, const char *cons)
{
- struct init_action *new_action, *a;
+ struct init_action *new_action, *a, *last;
- if (*cons == '\0')
- cons = console;
-
- /* do not run entries if console device is not available */
- if (access(cons, R_OK | W_OK))
- return;
- if (strcmp(cons, "/dev/null") == 0 && (action & ASKFIRST))
+ if (strcmp(cons, bb_dev_null) == 0 && (action & ASKFIRST))
return;
- new_action = calloc((size_t) (1), sizeof(struct init_action));
- if (!new_action) {
- message(LOG | CONSOLE, "Memory allocation failure");
- loop_forever();
+ /* Append to the end of the list */
+ for (a = last = init_action_list; a; a = a->next) {
+ /* don't enter action if it's already in the list,
+ * but do overwrite existing actions */
+ if ((strcmp(a->command, command) == 0)
+ && (strcmp(a->terminal, cons) == 0)
+ ) {
+ a->action = action;
+ return;
+ }
+ last = a;
}
- /* Append to the end of the list */
- for (a = init_action_list; a && a->next; a = a->next);
- if (a) {
- a->next = new_action;
+ new_action = xzalloc(sizeof(struct init_action));
+ if (last) {
+ last->next = new_action;
} else {
init_action_list = new_action;
}
strcpy(new_action->command, command);
new_action->action = action;
strcpy(new_action->terminal, cons);
-#if 0 /* calloc zeroed always */
- new_action->pid = 0;
-#endif
- messageD(LOG|CONSOLE, "command='%s' action='%d' terminal='%s'\n",
+ messageD(L_LOG | L_CONSOLE, "command='%s' action=%d tty='%s'\n",
new_action->command, new_action->action, new_action->terminal);
}
}
}
-/* 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 */
- 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
+#if ENABLE_FEATURE_USE_INITTAB
FILE *file;
char buf[INIT_BUFFS_SIZE], lineAsRead[INIT_BUFFS_SIZE];
- char tmpConsole[CONSOLE_BUFF_SIZE];
+ char tmpConsole[CONSOLE_NAME_SIZE];
char *id, *runlev, *action, *command, *eol;
const struct init_action_type *a = actions;
-
file = fopen(INITTAB, "r");
if (file == NULL) {
/* No inittab file -- set up some default behavior */
#endif
/* Reboot on Ctrl-Alt-Del */
- new_init_action(CTRLALTDEL, "/sbin/reboot", "");
+ new_init_action(CTRLALTDEL, "reboot", "");
/* Umount all filesystems on halt/reboot */
- new_init_action(SHUTDOWN, "/bin/umount -a -r", "");
-#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__)
+ new_init_action(SHUTDOWN, "umount -a -r", "");
/* Swapoff on halt/reboot */
- new_init_action(SHUTDOWN, "/sbin/swapoff -a", "");
-#endif
+ if (ENABLE_SWAPONOFF) new_init_action(SHUTDOWN, "swapoff -a", "");
/* Prepare to restart init when a HUP is received */
- new_init_action(RESTART, "/sbin/init", "");
+ new_init_action(RESTART, "init", "");
/* Askfirst shell on tty1-4 */
- new_init_action(ASKFIRST, LOGIN_SHELL, "");
- 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, "");
return;
-#ifdef CONFIG_FEATURE_USE_INITTAB
+#if ENABLE_FEATURE_USE_INITTAB
}
while (fgets(buf, INIT_BUFFS_SIZE, file) != NULL) {
continue;
/* Trim the trailing \n */
+ //XXX: chomp() ?
eol = strrchr(id, '\n');
if (eol != NULL)
*eol = '\0';
/* Separate the ID field from the runlevels */
runlev = strchr(id, ':');
if (runlev == NULL || *(runlev + 1) == '\0') {
- message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead);
+ message(L_LOG | L_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, "Bad inittab entry: %s", lineAsRead);
+ message(L_LOG | L_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, "Bad inittab entry: %s", lineAsRead);
+ message(L_LOG | L_CONSOLE, "Bad inittab entry: %s", lineAsRead);
continue;
} else {
*command = '\0';
id += 5;
strcpy(tmpConsole, "/dev/");
safe_strncpy(tmpConsole + 5, id,
- CONSOLE_BUFF_SIZE - 5);
+ sizeof(tmpConsole) - 5);
id = tmpConsole;
}
new_init_action(a->action, command, id);
}
if (a->name == 0) {
/* Choke on an unknown action */
- message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead);
+ message(L_LOG | L_CONSOLE, "Bad inittab entry: %s", lineAsRead);
}
}
fclose(file);
- return;
-#endif /* CONFIG_FEATURE_USE_INITTAB */
+#endif /* FEATURE_USE_INITTAB */
}
+#if ENABLE_FEATURE_USE_INITTAB
+static void reload_signal(int sig ATTRIBUTE_UNUSED)
+{
+ struct init_action *a, *tmp;
+
+ message(L_LOG, "reloading /etc/inittab");
-extern int init_main(int argc, char **argv)
+ /* disable old entrys */
+ for (a = init_action_list; a; a = a->next ) {
+ a->action = ONCE;
+ }
+
+ parse_inittab();
+
+ /* remove unused entrys */
+ for (a = init_action_list; a; a = tmp) {
+ tmp = a->next;
+ if ((a->action & (ONCE | SYSINIT | WAIT)) && a->pid == 0) {
+ delete_init_action(a);
+ }
+ }
+ run_actions(RESPAWN);
+}
+#endif /* FEATURE_USE_INITTAB */
+
+int init_main(int argc, char **argv);
+int init_main(int argc, char **argv)
{
struct init_action *a;
pid_t wpid;
- int status;
+
+ die_sleep = 30 * 24*60*60; /* if xmalloc will ever die... */
if (argc > 1 && !strcmp(argv[1], "-q")) {
- return kill_init(SIGHUP);
+ return kill(1, SIGHUP);
}
-#ifndef DEBUG_INIT
+#if !ENABLE_DEBUG_INIT
/* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
if (getpid() != 1
-#ifdef CONFIG_FEATURE_INITRD
- && strstr(bb_applet_name, "linuxrc") == NULL
-#endif
- ) {
+ && (!ENABLE_FEATURE_INITRD || !strstr(applet_name, "linuxrc"))
+ ) {
bb_show_usage();
}
/* 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(SIGQUIT, exec_signal);
+ signal(SIGUSR1, shutdown_signal);
+ signal(SIGUSR2, shutdown_signal);
signal(SIGINT, ctrlaltdel_signal);
- signal(SIGTERM, reboot_signal);
+ signal(SIGTERM, shutdown_signal);
signal(SIGCONT, cont_handler);
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 where the default console should be */
console_init();
-
- /* Close whatever files are open, and reset the console. */
- close(0);
- close(1);
- close(2);
-
- if (device_open(console, O_RDWR | O_NOCTTY) == 0) {
- set_term(0);
- close(0);
- }
-
+ set_sane_term();
chdir("/");
setsid();
{
const char * const *e;
/* Make sure environs is set to something sane */
- for(e = environment; *e; e++)
+ for (e = environment; *e; e++)
putenv((char *) *e);
}
+
+ if (argc > 1) setenv("RUNLEVEL", argv[1], 1);
+
/* Hello world */
- message(MAYBE_CONSOLE | LOG, "init started: %s", bb_msg_full_version);
+ message(MAYBE_CONSOLE | L_LOG, "init started: %s", bb_msg_full_version);
/* Make sure there is enough memory to do something useful. */
- check_memory();
+ if (ENABLE_SWAPONOFF) {
+ struct sysinfo info;
+
+ if (!sysinfo(&info) &&
+ (info.mem_unit ? : 1) * (long long)info.totalram < 1024*1024)
+ {
+ message(L_CONSOLE, "Low memory, forcing swapon");
+ /* swapon -a requires /proc typically */
+ new_init_action(SYSINIT, "mount -t proc proc /proc", "");
+ /* Try to turn on swap */
+ new_init_action(SYSINIT, "swapon -a", "");
+ run_actions(SYSINIT); /* wait and removing */
+ }
+ }
/* 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"))) {
+ if (argc > 1
+ && (!strcmp(argv[1], "single") || !strcmp(argv[1], "-s") || LONE_CHAR(argv[1], '1'))
+ ) {
/* Start a shell on console */
- new_init_action(RESPAWN, LOGIN_SHELL, "");
+ 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();
}
+#if ENABLE_SELINUX
+ if (getenv("SELINUX_INIT") == NULL) {
+ int enforce = 0;
+
+ putenv("SELINUX_INIT=YES");
+ if (selinux_init_load_policy(&enforce) == 0) {
+ BB_EXECVP(argv[0], argv);
+ } else if (enforce > 0) {
+ /* SELinux in enforcing mode but load_policy failed */
+ /* At this point, we probably can't open /dev/console, so log() won't work */
+ message(L_CONSOLE, "Cannot load SELinux Policy. "
+ "Machine is in enforcing mode. Halting now.");
+ exit(1);
+ }
+ }
+#endif /* CONFIG_SELINUX */
+
/* Make the command line just say "init" -- thats all, nothing else */
fixup_argv(argc, argv, "init");
/* 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,
- "No more tasks for init -- sleeping forever.");
- loop_forever();
- }
+#if ENABLE_FEATURE_USE_INITTAB
+ /* Redefine SIGHUP to reread /etc/inittab */
+ signal(SIGHUP, reload_signal);
+#else
+ signal(SIGHUP, SIG_IGN);
+#endif /* FEATURE_USE_INITTAB */
/* Now run the looping stuff for the rest of forever */
while (1) {
sleep(1);
/* Wait for a child process to exit */
- wpid = wait(&status);
+ wpid = wait(NULL);
while (wpid > 0) {
/* Find out who died and clean up their corpse */
for (a = init_action_list; a; a = a->next) {
/* Set the pid to 0 so that the process gets
* restarted by run_actions() */
a->pid = 0;
- message(LOG, "Process '%s' (pid %d) exited. "
+ message(L_LOG, "process '%s' (pid %d) exited. "
"Scheduling it for restart.",
a->command, wpid);
}
}
/* see if anyone else is waiting to be reaped */
- wpid = waitpid (-1, &status, WNOHANG);
+ wpid = waitpid(-1, NULL, WNOHANG);
}
}
}
-
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
projects / oweals / busybox.git / blobdiff