+/* vi: set sw=4 ts=4: */
/*
* Mini init implementation for busybox
*
*
*/
-#include "internal.h"
+/* Turn this on to disable all the dangerous
+ rebooting stuff when debugging.
+#define DEBUG_INIT
+*/
+
#include <stdio.h>
#include <stdlib.h>
-#include <stdarg.h>
-#include <unistd.h>
#include <errno.h>
+#include <paths.h>
#include <signal.h>
+#include <stdarg.h>
+#include <string.h>
#include <termios.h>
-#include <paths.h>
-#include <sys/types.h>
+#include <unistd.h>
+#include <limits.h>
#include <sys/fcntl.h>
-#include <sys/wait.h>
-#include <string.h>
-#include <sys/mount.h>
-#include <sys/reboot.h>
-#include <sys/kdaemon.h>
-#include <sys/sysmacros.h>
-#include <linux/serial.h> /* for serial_struct */
-#include <sys/vt.h> /* for vt_stat */
#include <sys/ioctl.h>
-#include <linux/version.h>
+#include <sys/mount.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include "busybox.h"
+#define bb_need_full_version
+#define BB_DECLARE_EXTERN
+#include "messages.c"
#ifdef BB_SYSLOGD
-#include <sys/syslog.h>
+# include <sys/syslog.h>
#endif
-#if ! defined BB_FEATURE_USE_PROCFS
-#error Sorry, I depend on the /proc filesystem right now.
+
+/* 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];
+};
+
+
+
+#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;
+#if defined(__GLIBC__) || defined (__UCLIBC__)
+#include <sys/reboot.h>
+ #define init_reboot(magic) reboot(magic)
+#else
+ #define init_reboot(magic) reboot(0xfee1dead, 672274793, magic)
+#endif
#endif
-#ifndef KERNEL_VERSION
-#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
+#ifndef _PATH_STDPATH
+#define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
#endif
-#define VT_PRIMARY "/dev/tty1" /* Primary virtual console */
-#define VT_SECONDARY "/dev/tty2" /* Virtual console */
-#define VT_LOG "/dev/tty3" /* Virtual console */
-#define SERIAL_CON0 "/dev/ttyS0" /* Primary serial console */
-#define SERIAL_CON1 "/dev/ttyS1" /* Serial console */
-#define GETTY "/sbin/getty" /* Default location of getty */
-#define SHELL "/bin/sh" /* Default shell */
-#define INITTAB "/etc/inittab" /* inittab file location */
-#ifndef BB_INIT_SCRIPT
-#define BB_INIT_SCRIPT "/etc/init.d/rcS" /* Initscript. */
+#if defined BB_FEATURE_INIT_COREDUMPS
+/*
+ * 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
-#if 1
-
-#define LOG 0x1
-#define CONSOLE 0x2
-static char *console = _PATH_CONSOLE;
-static char *second_console = VT_SECONDARY;
-static char *log = VT_LOG;
-static int kernel_version = 0;
+#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
+#if defined(__GLIBC__)
+#include <sys/kdaemon.h>
+#else
+extern int bdflush (int func, long int data);
+#endif /* __GLIBC__ */
+
+
+#define VT_PRIMARY "/dev/tty1" /* Primary virtual console */
+#define VT_SECONDARY "/dev/tty2" /* Virtual console */
+#define VT_THIRD "/dev/tty3" /* Virtual console */
+#define VT_FOURTH "/dev/tty4" /* Virtual console */
+#define VT_LOG "/dev/tty5" /* Virtual console */
+#define SERIAL_CON0 "/dev/ttyS0" /* Primary serial console */
+#define SERIAL_CON1 "/dev/ttyS1" /* Serial console */
+#define SHELL "-/bin/sh" /* Default shell */
+#define INITTAB "/etc/inittab" /* inittab file location */
+#ifndef INIT_SCRIPT
+#define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */
+#endif
-/* try to open up the specified device */
-int device_open(char *device, int mode)
+#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;
+
+/* A mapping between "inittab" action name strings and action type codes. */
+typedef struct initActionType {
+ const char *name;
+ initActionEnum action;
+} initActionType;
+
+static const struct initActionType actions[] = {
+ {"sysinit", SYSINIT},
+ {"respawn", RESPAWN},
+ {"askfirst", ASKFIRST},
+ {"wait", WAIT},
+ {"once", ONCE},
+ {"ctrlaltdel", CTRLALTDEL},
+ {"shutdown", SHUTDOWN},
+ {0, 0}
+};
+
+/* Set up a linked list of initActions, to be read from inittab */
+typedef struct initActionTag initAction;
+struct initActionTag {
+ pid_t pid;
+ char process[256];
+ char console[256];
+ initAction *nextPtr;
+ initActionEnum action;
+};
+static initAction *initActionList = NULL;
+
+
+static char *secondConsole = VT_SECONDARY;
+static char *thirdConsole = VT_THIRD;
+static char *fourthConsole = VT_FOURTH;
+static char *log = VT_LOG;
+static int kernelVersion = 0;
+static char termType[32] = "TERM=linux";
+static char console[32] = _PATH_CONSOLE;
+
+static void delete_initAction(initAction * action);
+
+
+
+/* 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)));
+static void message(int device, char *fmt, ...)
{
- int m, f, fd = -1;
-
- m = mode | O_NONBLOCK;
-
- /* Retry up to 5 times */
- for (f = 0; f < 5; f++)
- if ((fd = open(device, m)) >= 0)
- break;
- if (fd < 0)
- return fd;
- /* Reset original flags. */
- if (m != mode)
- fcntl(fd, F_SETFL, mode);
- return fd;
-}
+ va_list arguments;
+ int fd;
-/* print a message to the specified device:
- * device may be bitwise-or'd from LOG | CONSOLE */
-void message(int device, char *fmt, ...)
-{
- int fd;
- va_list arguments;
#ifdef BB_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(LOG_DAEMON|LOG_NOTICE, msg);
- }
+ /* Log the message to syslogd */
+ if (device & LOG) {
+ char msg[1024];
+ va_start(arguments, fmt);
+ vsnprintf(msg, sizeof(msg), fmt, arguments);
+ va_end(arguments);
+ openlog(applet_name, 0, LOG_USER);
+ syslog(LOG_USER|LOG_INFO, msg);
+ closelog();
+ }
#else
- static int log_fd=-1;
-
- /* Take full control of the log tty, and never close it.
- * It's mine, all mine! Muhahahaha! */
- if (log_fd < 0) {
- if (log == NULL) {
- /* don't even try to log, because there is no such console */
- log_fd = -2;
- /* log to main console instead */
- device = CONSOLE;
- }
- else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) {
- log_fd=-1;
- fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log);
- fflush(stderr);
- return;
+ static int log_fd = -1;
+
+ /* Take full control of the log tty, and never close it.
+ * It's mine, all mine! Muhahahaha! */
+ if (log_fd < 0) {
+ if (log == NULL) {
+ /* don't even try to log, because there is no such console */
+ log_fd = -2;
+ /* log to main console instead */
+ device = CONSOLE;
+ } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) {
+ log_fd = -2;
+ fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log);
+ log = NULL;
+ device = CONSOLE;
+ }
+ }
+ if ((device & LOG) && (log_fd >= 0)) {
+ va_start(arguments, fmt);
+ vdprintf(log_fd, fmt, arguments);
+ va_end(arguments);
}
- }
- if ( (device & LOG) && (log_fd >= 0) ) {
- va_start(arguments, fmt);
- vdprintf(log_fd, fmt, arguments);
- va_end(arguments);
- }
#endif
- if (device & CONSOLE) {
- /* 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);
- close(fd);
- } else {
- fprintf(stderr, "Bummer, can't print: ");
- va_start(arguments, fmt);
- vfprintf(stderr, fmt, arguments);
- fflush(stderr);
- va_end(arguments);
+ if (device & CONSOLE) {
+ /* 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);
+ close(fd);
+ } else {
+ fprintf(stderr, "Bummer, can't print: ");
+ va_start(arguments, fmt);
+ vfprintf(stderr, fmt, arguments);
+ va_end(arguments);
+ }
}
- }
}
-
/* Set terminal settings to reasonable defaults */
-void set_term( int fd)
+static void set_term(int fd)
{
- struct termios tty;
- static const char control_characters[] = {
- '\003', '\034', '\177', '\025', '\004', '\0',
- '\1', '\0', '\021', '\023', '\032', '\0', '\022',
- '\017', '\027', '\026', '\0'
- };
+ struct termios tty;
- tcgetattr(fd, &tty);
+ tcgetattr(fd, &tty);
- /* set control chars */
- memcpy(tty.c_cc, control_characters, sizeof(control_characters));
+ /* set control chars */
+ tty.c_cc[VINTR] = 3; /* C-c */
+ tty.c_cc[VQUIT] = 28; /* C-\ */
+ tty.c_cc[VERASE] = 127; /* C-? */
+ tty.c_cc[VKILL] = 21; /* C-u */
+ tty.c_cc[VEOF] = 4; /* C-d */
+ tty.c_cc[VSTART] = 17; /* C-q */
+ tty.c_cc[VSTOP] = 19; /* C-s */
+ tty.c_cc[VSUSP] = 26; /* C-z */
- /* use line dicipline 0 */
- tty.c_line = 0;
+ /* use line dicipline 0 */
+ tty.c_line = 0;
- /* Make it be sane */
- //tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
- //tty.c_cflag |= HUPCL|CLOCAL;
+ /* Make it be sane */
+ tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
+ tty.c_cflag |= HUPCL|CLOCAL;
- /* input modes */
- tty.c_iflag = ICRNL|IXON|IXOFF;
+ /* input modes */
+ tty.c_iflag = ICRNL | IXON | IXOFF;
- /* output modes */
- tty.c_oflag = OPOST|ONLCR;
+ /* output modes */
+ tty.c_oflag = OPOST | ONLCR;
- /* local modes */
- tty.c_lflag = ISIG|ICANON|ECHO|ECHOE|ECHOK|ECHOCTL|ECHOKE|IEXTEN;
+ /* local modes */
+ tty.c_lflag =
+ ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN;
- tcsetattr(fd, TCSANOW, &tty);
+ tcsetattr(fd, TCSANOW, &tty);
}
-/* How much memory does this machine have? */
-static int mem_total()
+/* How much memory does this machine have?
+ Units are kBytes to avoid overflow on 4GB machines */
+static int check_free_memory()
{
- char s[80];
- char *p = "/proc/meminfo";
- FILE *f;
- const char pattern[] = "MemTotal:";
-
- if ((f = fopen(p, "r")) < 0) {
- message(LOG, "Error opening %s: %s\n", p, strerror( errno));
- return -1;
- }
- while (NULL != fgets(s, 79, f)) {
- p = strstr(s, pattern);
- if (NULL != p) {
- fclose(f);
- return (atoi(p + strlen(pattern)));
+ struct sysinfo info;
+ unsigned int result, u, s=10;
+
+ if (sysinfo(&info) != 0) {
+ perror_msg("Error checking free memory");
+ return -1;
}
- }
- 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;
}
static void console_init()
{
- int fd;
- int tried_devcons = 0;
- int tried_vtprimary = 0;
- struct serial_struct sr;
- char *s;
-
- if ((s = getenv("CONSOLE")) != NULL) {
- console = s;
- }
-#if #cpu(sparc)
- /* 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)
- console = SERIAL_CON0;
- else if (strcmp( s, "ttyb" )==0)
- console = SERIAL_CON1;
- }
-#endif
- else {
+ int fd;
+ int tried_devcons = 0;
+ int tried_vtprimary = 0;
struct vt_stat vt;
- static char the_console[13];
+ struct serial_struct sr;
+ char *s;
- console = the_console;
- /* 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( the_console, sizeof the_console, "/dev/ttyS%d", sr.line );
+ if ((s = getenv("TERM")) != NULL) {
+ snprintf(termType, sizeof(termType) - 1, "TERM=%s", s);
}
- else if (ioctl(0, VT_GETSTATE, &vt) == 0) {
- /* this is linux virtual tty */
- snprintf( the_console, sizeof the_console, "/dev/tty%d", vt.v_active );
- } else {
- console = _PATH_CONSOLE;
- tried_devcons++;
+
+ if ((s = getenv("CONSOLE")) != NULL) {
+ snprintf(console, sizeof(console) - 1, "%s", s);
}
- }
-
- while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
- /* Can't open selected console -- try /dev/console */
- if (!tried_devcons) {
- tried_devcons++;
- console = _PATH_CONSOLE;
- continue;
+#if #cpu(sparc)
+ /* 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)
+ snprintf(console, sizeof(console) - 1, "%s", SERIAL_CON0);
+ else if (strcmp(s, "ttyb") == 0)
+ snprintf(console, sizeof(console) - 1, "%s", SERIAL_CON1);
}
- /* Can't open selected console -- try vt1 */
- if (!tried_vtprimary) {
- tried_vtprimary++;
- console = VT_PRIMARY;
- continue;
+#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, "/dev/ttyS%d", sr.line);
+ } else if (ioctl(0, VT_GETSTATE, &vt) == 0) {
+ /* this is linux virtual tty */
+ snprintf(console, sizeof(console) - 1, "/dev/tty%d",
+ vt.v_active);
+ } else {
+ snprintf(console, sizeof(console) - 1, "%s", _PATH_CONSOLE);
+ tried_devcons++;
+ }
+ }
+
+ while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
+ /* Can't open selected console -- try /dev/console */
+ if (!tried_devcons) {
+ tried_devcons++;
+ snprintf(console, sizeof(console) - 1, "%s", _PATH_CONSOLE);
+ continue;
+ }
+ /* Can't open selected console -- try vt1 */
+ if (!tried_vtprimary) {
+ tried_vtprimary++;
+ snprintf(console, sizeof(console) - 1, "%s", VT_PRIMARY);
+ continue;
+ }
+ break;
}
- break;
- }
- if (fd < 0)
- /* Perhaps we should panic here? */
- console = "/dev/null";
- else {
- /* check for serial console and disable logging to tty3 & running a
- * shell to tty2 */
- if (ioctl(0,TIOCGSERIAL,&sr) == 0) {
- message(LOG|CONSOLE, "serial console detected. Disabling 2nd virtual terminal.\r\n", console );
- log = NULL;
- second_console = NULL;
+ if (fd < 0) {
+ /* Perhaps we should panic here? */
+ snprintf(console, sizeof(console) - 1, "/dev/null");
+ } else {
+ /* 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;
+ thirdConsole = NULL;
+ fourthConsole = NULL;
+ /* Force the TERM setting to vt102 for serial console --
+ * iff TERM is set to linux (the default) */
+ if (strcmp( termType, "TERM=linux" ) == 0)
+ snprintf(termType, sizeof(termType) - 1, "TERM=vt102");
+ message(LOG | CONSOLE,
+ "serial console detected. Disabling virtual terminals.\r\n");
+ }
+ close(fd);
}
- close(fd);
- }
- message(LOG, "console=%s\n", console );
+ message(LOG, "console=%s\n", console);
}
-
-static int waitfor(int pid)
+
+static void fixup_argv(int argc, char **argv, char *new_argv0)
{
- int status, wpid;
-
- message(LOG, "Waiting for process %d.\n", pid);
- while ((wpid = wait(&status)) != pid) {
- if (wpid > 0)
- message(LOG, "pid %d exited, status=0x%x.\n", wpid, status);
- }
- return wpid;
+ int len;
+ /* Fix up argv[0] to be certain we claim to be init */
+ len = strlen(argv[0]);
+ memset(argv[0], 0, len);
+ strncpy(argv[0], new_argv0, len);
+
+ /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */
+ len = 1;
+ while (argc > len) {
+ memset(argv[len], 0, strlen(argv[len]));
+ len++;
+ }
}
-static pid_t run(const char * const* command,
- char *terminal, int get_enter)
+static pid_t run(char *command, char *terminal, int get_enter)
{
- int fd;
- pid_t pid;
- const char * const* cmd = command+1;
- static const char press_enter[] =
- "\nPlease press Enter to activate this console. ";
-
- if ((pid = fork()) == 0) {
- /* Clean up */
- close(0);
- close(1);
- close(2);
- setsid();
+ 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[] =
+
+#ifdef CUSTOMIZED_BANNER
+#include CUSTOMIZED_BANNER
+#endif
- /* Reset signal handlers set for parent process */
- signal(SIGUSR1, SIG_DFL);
- signal(SIGUSR2, SIG_DFL);
- signal(SIGINT, SIG_DFL);
- signal(SIGTERM, SIG_DFL);
+ "\nPlease press Enter to activate this console. ";
+ char *environment[MAXENV+1] = {
+ termType,
+ "HOME=/",
+ "PATH=/usr/bin:/bin:/usr/sbin:/sbin",
+ "SHELL=/bin/sh",
+ "USER=root",
+ NULL
+ };
- if ((fd = device_open(terminal, O_RDWR)) < 0) {
- message(LOG, "Bummer, can't open %s\r\n", terminal);
- exit(-1);
+ /* 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;
+ }
}
- dup(fd);
- dup(fd);
- tcsetpgrp(0, getpgrp());
- set_term(0);
- if (get_enter==TRUE) {
- /*
- * 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.
- */
- char c;
- message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
- *cmd, getpid(), terminal );
- write(1, press_enter, sizeof(press_enter) - 1);
- read(0, &c, 1);
+ if ((pid = fork()) == 0) {
+ /* Clean up */
+ ioctl(0, TIOCNOTTY, 0);
+ close(0);
+ close(1);
+ close(2);
+ setsid();
+
+ /* Reset signal handlers set for parent process */
+ signal(SIGUSR1, SIG_DFL);
+ signal(SIGUSR2, 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);
+ }
+ message(LOG | CONSOLE, "Bummer, can't open %s\r\n", terminal);
+ exit(1);
+ }
+ dup2(fd, 0);
+ dup2(fd, 1);
+ dup2(fd, 2);
+ ioctl(0, TIOCSCTTY, 1);
+ tcsetpgrp(0, getpgrp());
+ set_term(0);
+
+ /* See if any special /bin/sh requiring characters are present */
+ if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
+ cmd[0] = SHELL;
+ cmd[1] = "-c";
+ strcpy(buf, "exec ");
+ strncat(buf, command, sizeof(buf) - strlen(buf) - 1);
+ cmd[2] = buf;
+ cmd[3] = NULL;
+ } else {
+ /* Convert command (char*) into cmd (char**, one word per string) */
+ for (tmpCmd = command, i = 0;
+ (tmpCmd = strsep(&command, " \t")) != NULL;) {
+ if (*tmpCmd != '\0') {
+ cmd[i] = tmpCmd;
+ tmpCmd++;
+ i++;
+ }
+ }
+ cmd[i] = NULL;
+ }
+
+ 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 = get_last_path_component(cmdpath);
+
+ /* make a new argv[0] */
+ if ((cmd[0] = malloc(strlen(s)+2)) == NULL) {
+ message(LOG | CONSOLE, "malloc failed");
+ cmd[0] = cmdpath;
+ } else {
+ cmd[0][0] = '-';
+ strcpy(cmd[0]+1, s);
+ }
+ }
+
+ if (get_enter == TRUE) {
+ /*
+ * 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.
+ */
+#ifdef DEBUG_INIT
+ message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
+ cmd[0], getpid(), terminal);
+#endif
+ 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'\r\n",
+ getpid(), terminal, command);
+#endif
+
+#if defined BB_FEATURE_INIT_COREDUMPS
+ if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) {
+ struct rlimit limit;
+ limit.rlim_cur = RLIM_INFINITY;
+ 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. */
+ execve(cmdpath, cmd, environment);
+
+ /* We're still here? Some error happened. */
+ message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath,
+ strerror(errno));
+ exit(-1);
}
+ return pid;
+}
- /* Log the process name and args */
- message(LOG|CONSOLE, "Starting pid %d, console %s: '", getpid(), terminal);
- while ( *cmd) message(LOG|CONSOLE, "%s ", *cmd++);
- message(LOG|CONSOLE, "'\r\n");
-
- /* Now run it. The new program will take over this PID,
- * so nothing further in init.c should be run. */
- execvp(*command, (char**)command+1);
-
- message(LOG, "Bummer, could not run '%s'\n", command);
- exit(-1);
- }
- return pid;
+static int waitfor(char *command, char *terminal, int get_enter)
+{
+ int status, wpid;
+ int pid = run(command, terminal, get_enter);
+
+ while (1) {
+ wpid = wait(&status);
+ if (wpid > 0 && wpid != pid) {
+ continue;
+ }
+ if (wpid == pid)
+ break;
+ }
+ return wpid;
}
/* Make sure there is enough memory to do something useful. *
- * Calls swapon if needed so be sure /proc is mounted. */
+ * Calls "swapon -a" if needed so be sure /etc/fstab is present... */
static void check_memory()
{
- struct stat statbuf;
- const char* const swap_on_cmd[] =
- { "/bin/swapon", "swapon", "-a", 0};
-
- if (mem_total() > 3500)
+ struct stat statBuf;
+
+ if (check_free_memory() > 1000)
+ return;
+
+ 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;
- if (stat("/etc/fstab", &statbuf) == 0) {
- /* Try to turn on swap */
- waitfor(run(swap_on_cmd, log, FALSE));
- if (mem_total() < 3500)
- goto goodnight;
- } else
- goto goodnight;
- return;
-
-goodnight:
- message(CONSOLE, "Sorry, your computer does not have enough memory.\r\n");
- while (1) sleep(1);
+ goodnight:
+ message(CONSOLE,
+ "Sorry, your computer does not have enough memory.\r\n");
+ while (1)
+ sleep(1);
}
-static void shutdown_system(void)
+/* Run all commands to be run right before halt/reboot */
+static void run_actions(initActionEnum action)
{
- const char* const swap_off_cmd[] = { "swapoff", "swapoff", "-a", 0};
- const char* const umount_cmd[] = { "umount", "umount", "-a", 0};
+ initAction *a, *tmp;
+ for (a = initActionList; a; a = tmp) {
+ tmp = a->nextPtr;
+ if (a->action == action) {
+ waitfor(a->process, a->console, FALSE);
+ delete_initAction(a);
+ }
+ }
+}
+
#ifndef DEBUG_INIT
- /* Allow Ctrl-Alt-Del to reboot system. */
- reboot(RB_ENABLE_CAD);
-#endif
- message(CONSOLE, "\r\nThe system is going down NOW !!\r\n");
- sync();
- /* Send signals to every process _except_ pid 1 */
- message(CONSOLE, "Sending SIGHUP to all processes.\r\n");
-#ifndef DEBUG_INIT
- kill(-1, SIGHUP);
-#endif
- sleep(2);
- sync();
- message(CONSOLE, "Sending SIGKILL to all processes.\r\n");
-#ifndef DEBUG_INIT
- kill(-1, SIGKILL);
-#endif
- sleep(1);
- message(CONSOLE, "Disabling swap.\r\n");
- waitfor(run( swap_off_cmd, console, FALSE));
- message(CONSOLE, "Unmounting filesystems.\r\n");
- waitfor(run( umount_cmd, console, FALSE));
- sync();
- if (kernel_version > 0 && kernel_version <= 2 * 65536 + 2 * 256 + 11) {
- /* bdflush, kupdate not needed for kernels >2.2.11 */
- message(CONSOLE, "Flushing buffers.\r\n");
- bdflush(1, 0);
+static void shutdown_system(void)
+{
+
+ /* first disable our SIGHUP signal */
+ signal(SIGHUP, SIG_DFL);
+
+ /* Allow Ctrl-Alt-Del to reboot system. */
+ init_reboot(RB_ENABLE_CAD);
+
+ message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n");
sync();
- }
+
+ /* Send signals to every process _except_ pid 1 */
+ message(CONSOLE|LOG, "Sending SIGTERM to all processes.\r\n");
+ kill(-1, SIGTERM);
+ sleep(1);
+ sync();
+
+ message(CONSOLE|LOG, "Sending SIGKILL to all processes.\r\n");
+ kill(-1, SIGKILL);
+ sleep(1);
+
+ /* run everything to be run at "ctrlaltdel" */
+ run_actions(SHUTDOWN);
+
+ 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 halt_signal(int sig)
{
- shutdown_system();
- message(CONSOLE,
- "The system is halted. Press CTRL-ALT-DEL or turn off power\r\n");
- sync();
-#ifndef DEBUG_INIT
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
- if (sig == SIGUSR2)
- reboot(RB_POWER_OFF);
- else
-#endif
- reboot(RB_HALT_SYSTEM);
-#endif
- exit(0);
+ shutdown_system();
+ message(CONSOLE|LOG,
+ "The system is halted. Press %s or turn off power\r\n",
+ (secondConsole == NULL) /* serial console */
+ ? "Reset" : "CTRL-ALT-DEL");
+ sync();
+
+ /* allow time for last message to reach serial console */
+ sleep(2);
+
+ if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0))
+ init_reboot(RB_POWER_OFF);
+ else
+ init_reboot(RB_HALT_SYSTEM);
+ exit(0);
}
static void reboot_signal(int sig)
{
- shutdown_system();
- message(CONSOLE, "Please stand by while rebooting the system.\r\n");
- sync();
-#ifndef DEBUG_INIT
- reboot(RB_AUTOBOOT);
-#endif
- exit(0);
-}
+ shutdown_system();
+ message(CONSOLE|LOG, "Please stand by while rebooting the system.\r\n");
+ sync();
-extern int init_main(int argc, char **argv)
-{
- int run_rc = FALSE;
- int single = FALSE;
- int wait_for_enter_tty1 = TRUE;
- int wait_for_enter_tty2 = TRUE;
- pid_t pid1 = 0;
- pid_t pid2 = 0;
- struct stat statbuf;
- char which_vt1[30];
- char which_vt2[30];
- const char* const rc_script_command[] = { BB_INIT_SCRIPT, BB_INIT_SCRIPT, 0};
- const char* const getty1_command[] = { GETTY, GETTY, "38400", which_vt1, 0};
- const char* const getty2_command[] = { GETTY, GETTY, "38400", which_vt2, 0};
- const char* const shell_command[] = { SHELL, "-" SHELL, 0};
- const char* const* tty1_command = shell_command;
- const char* const* tty2_command = shell_command;
-#ifdef BB_INIT_CMD_IF_RC_SCRIPT_EXITS
- const char* const rc_exit_command[] = { "BB_INIT_CMD_IF_RC_SCRIPT_EXITS",
- "BB_INIT_CMD_IF_RC_SCRIPT_EXITS", 0 };
-#endif
+ /* allow time for last message to reach serial console */
+ sleep(2);
-#ifdef DEBUG_INIT
- char *hello_msg_format =
- "init(%d) started: BusyBox v%s (%s) multi-call binary\r\n";
-#else
- char *hello_msg_format =
- "init started: BusyBox v%s (%s) multi-call binary\r\n";
-#endif
+ init_reboot(RB_AUTOBOOT);
+ exit(0);
+}
-
-#ifndef DEBUG_INIT
- /* Expect to be PID 1 iff we are run as init (not linuxrc) */
- if (getpid() != 1 && strstr(argv[0], "init")!=NULL ) {
- usage( "init\n\nInit is the parent of all processes.\n\n"
- "This version of init is designed to be run only by the kernel\n");
- }
-#endif
+static void ctrlaltdel_signal(int sig)
+{
+ run_actions(CTRLALTDEL);
+}
- /* Set up sig handlers -- be sure to
- * clear all of these in run() */
- signal(SIGUSR1, halt_signal);
- signal(SIGUSR2, reboot_signal);
- signal(SIGINT, reboot_signal);
- signal(SIGTERM, reboot_signal);
+#endif /* ! DEBUG_INIT */
- /* Turn off rebooting via CTL-ALT-DEL -- we get a
- * SIGINT on CAD so we can shut things down gracefully... */
-#ifndef DEBUG_INIT
- reboot(RB_DISABLE_CAD);
-#endif
+static void new_initAction(initActionEnum action, char *process, char *cons)
+{
+ initAction *newAction;
+
+ 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.
+ * The exception to this rule is the null device.
+ */
+ if (secondConsole == NULL && strcmp(cons, console)
+ && strcmp(cons, "/dev/null"))
+ return;
+
+ newAction = calloc((size_t) (1), sizeof(initAction));
+ if (!newAction) {
+ message(LOG | CONSOLE, "Memory allocation failure\n");
+ while (1)
+ sleep(1);
+ }
+ newAction->nextPtr = initActionList;
+ initActionList = newAction;
+ strncpy(newAction->process, process, 255);
+ newAction->action = action;
+ strncpy(newAction->console, cons, 255);
+ newAction->pid = 0;
+// message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n",
+// newAction->process, newAction->action, newAction->console);
+}
- /* Figure out where the default console should be */
- console_init();
+static void delete_initAction(initAction * action)
+{
+ initAction *a, *b = NULL;
+
+ for (a = initActionList; a; b = a, a = a->nextPtr) {
+ if (a == action) {
+ if (b == NULL) {
+ initActionList = a->nextPtr;
+ } else {
+ b->nextPtr = a->nextPtr;
+ }
+ free(a);
+ break;
+ }
+ }
+}
- /* Close whatever files are open, and reset the console. */
- close(0);
- close(1);
- close(2);
- set_term(0);
- setsid();
+/* NOTE that if BB_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 BB_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 BB_FEATURE_USE_INITTAB
+ FILE *file;
+ char buf[256], lineAsRead[256], tmpConsole[256];
+ char *id, *runlev, *action, *process, *eol;
+ const struct initActionType *a = actions;
+ int foundIt;
- /* Make sure PATH is set to something sane */
- putenv(_PATH_STDPATH);
-
- /* Hello world */
-#ifndef DEBUG_INIT
- message(CONSOLE|LOG, hello_msg_format, BB_VER, BB_BT);
-#else
- message(CONSOLE|LOG, hello_msg_format, getpid(), BB_VER, BB_BT);
+ file = fopen(INITTAB, "r");
+ if (file == NULL) {
+ /* No inittab file -- set up some default behavior */
#endif
-
-
- /* Mount /proc */
- if (mount ("proc", "/proc", "proc", 0, 0) == 0) {
- message(CONSOLE|LOG, "Mounting /proc: done.\n");
- kernel_version = get_kernel_revision();
- } else
- message(CONSOLE|LOG, "Mounting /proc: failed!\n");
-
- /* 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"))) {
- single = TRUE;
- tty1_command = shell_command;
- tty2_command = shell_command;
- }
-
- /* Make sure an init script exists before trying to run it */
- if (single==FALSE && stat(BB_INIT_SCRIPT, &statbuf)==0) {
- run_rc = TRUE;
- wait_for_enter_tty1 = FALSE;
- tty1_command = rc_script_command;
- }
-
- /* Make sure /sbin/getty exists before trying to run it */
- if (stat(GETTY, &statbuf)==0) {
- char* where;
- /* First do tty2 */
- wait_for_enter_tty2 = FALSE;
- where = strrchr( second_console, '/');
- if ( where != NULL) {
- where++;
- strncpy( which_vt2, where, sizeof(which_vt2));
+ /* Reboot on Ctrl-Alt-Del */
+ new_initAction(CTRLALTDEL, "/sbin/reboot", console);
+ /* Swapoff on halt/reboot */
+ new_initAction(SHUTDOWN, "/sbin/swapoff -a", console);
+ /* Umount all filesystems on halt/reboot */
+ new_initAction(SHUTDOWN, "/bin/umount -a -r", console);
+ /* Askfirst shell on tty1 */
+ new_initAction(ASKFIRST, SHELL, console);
+ /* Askfirst shell on tty2 */
+ if (secondConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, secondConsole);
+ /* Askfirst shell on tty3 */
+ if (thirdConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, thirdConsole);
+ /* Askfirst shell on tty4 */
+ if (fourthConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, fourthConsole);
+ /* sysinit */
+ new_initAction(SYSINIT, INIT_SCRIPT, console);
+
+ return;
+#ifdef BB_FEATURE_USE_INITTAB
}
- tty2_command = getty2_command;
-
- /* Check on hooking a getty onto tty1 */
- if (run_rc == FALSE && single==FALSE) {
- wait_for_enter_tty1 = FALSE;
- where = strrchr( console, '/');
- if ( where != NULL) {
- where++;
- strncpy( which_vt1, where, sizeof(which_vt1));
- }
- tty1_command = getty1_command;
+
+ while (fgets(buf, 255, file) != NULL) {
+ foundIt = FALSE;
+ /* Skip leading spaces */
+ for (id = buf; *id == ' ' || *id == '\t'; id++);
+
+ /* Skip the line if it's a comment */
+ if (*id == '#' || *id == '\n')
+ continue;
+
+ /* Trim the trailing \n */
+ eol = strrchr(id, '\n');
+ if (eol != NULL)
+ *eol = '\0';
+
+ /* Keep a copy around for posterity's sake (and error msgs) */
+ strcpy(lineAsRead, buf);
+
+ /* 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);
+ continue;
+ } else {
+ *runlev = '\0';
+ ++runlev;
+ }
+
+ /* Separate the runlevels from the action */
+ action = strchr(runlev, ':');
+ if (action == NULL || *(action + 1) == '\0') {
+ message(LOG | CONSOLE, "Bad 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);
+ continue;
+ } else {
+ *process = '\0';
+ ++process;
+ }
+
+ /* Ok, now process it */
+ a = actions;
+ while (a->name != 0) {
+ if (strcmp(a->name, action) == 0) {
+ if (*id != '\0') {
+ strcpy(tmpConsole, "/dev/");
+ strncat(tmpConsole, id, 200);
+ id = tmpConsole;
+ }
+ new_initAction(a->action, process, id);
+ foundIt = TRUE;
+ }
+ a++;
+ }
+ if (foundIt == TRUE)
+ continue;
+ else {
+ /* Choke on an unknown action */
+ message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
+ }
}
- }
-
+ return;
+#endif /* BB_FEATURE_USE_INITTAB */
+}
+
- /* Ok, now launch the tty1_command and tty2_command */
- for (;;) {
+
+extern int init_main(int argc, char **argv)
+{
+ initAction *a, *tmp;
pid_t wpid;
int status;
- if (pid1 == 0 && tty1_command) {
- pid1 = run(tty1_command, console, wait_for_enter_tty1);
- }
-#ifdef BB_FEATURE_INIT_SECOND_CONSOLE
- if (pid2 == 0 && tty2_command && second_console) {
- pid2 = run(tty2_command, second_console, wait_for_enter_tty2);
- }
+#ifndef DEBUG_INIT
+ /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
+ if (getpid() != 1
+#ifdef BB_FEATURE_LINUXRC
+ && strstr(applet_name, "linuxrc") == NULL
#endif
- wpid = wait(&status);
- if (wpid > 0 ) {
- message(LOG, "pid %d exited, status=%x.\n", wpid, status);
+ )
+ {
+ show_usage();
}
- /* Don't respawn init script if it exits */
- if (wpid == pid1) {
- if (run_rc == FALSE) {
- pid1 = 0;
- }
-#ifdef BB_INIT_CMD_IF_RC_SCRIPT_EXITS
- else {
- pid1 = 0;
- run_rc=FALSE;
- wait_for_enter_tty1=TRUE;
- tty1_command=rc_exit_command;
- }
+ /* Set up sig handlers -- be sure to
+ * clear all of these in run() */
+ signal(SIGUSR1, halt_signal);
+ signal(SIGUSR2, halt_signal);
+ signal(SIGINT, ctrlaltdel_signal);
+ signal(SIGTERM, reboot_signal);
+
+ /* 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
- }
-#ifdef BB_FEATURE_INIT_SECOND_CONSOLE
- if (wpid == pid2) {
- pid2 = 0;
- }
-#endif
- sleep(1);
- }
-}
-
-#else
+ /* Figure out what kernel this is running */
+ kernelVersion = get_kernel_revision();
-void parse_inittab(void)
-{
- FILE* file;
- char buf[256];
- char action[256]="";
- char process[256]="";
- char *p, *q;
+ /* 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);
+ set_term(0);
+ chdir("/");
+ setsid();
- if ((file = fopen(INITTAB, "r")) < 0) {
- /* No inittab file -- set up some default behavior */
+ /* Make sure PATH is set to something sane */
+ putenv("PATH="_PATH_STDPATH);
- /* FIXME */
- return;
- }
-
- while ( fgets(buf, 255, file) != NULL) {
- for(p = buf; *p == ' ' || *p == '\t'; p++);
- if (*p == '#' || *p == '\n') continue;
-
- /* Trim the trailing \n */
- q = strrchr( p, '\n');
- if (q != NULL)
- *q='\0';
-
- /* Skip past the ID field and the runlevel
- * field (both are ignored) */
- p = strchr( p, ':');
-
- /* Now peal off the process field from the end
- * of the string */
- q = strrchr( p, ':');
- if ( q == NULL || q+1 == NULL)
- goto choke;
- *q='\0';
- strcpy( process, ++q);
- fprintf(stderr, "process=%s\n", process);
+ /* Hello world */
+#ifndef DEBUG_INIT
+ message(
+#if ! defined BB_FEATURE_EXTRA_QUIET
+ CONSOLE|
+#endif
+ LOG,
+ "init started: %s\r\n", full_version);
+#else
+ message(
+#if ! defined BB_FEATURE_EXTRA_QUIET
+ CONSOLE|
+#endif
+ LOG,
+ "init(%d) started: %s\r\n", getpid(), full_version);
+#endif
-
- /* Now peal off the action field */
- q = strrchr( p, ':');
- if ( q == NULL || q+1 == NULL)
- goto choke;
- strcpy( action, ++q);
- fprintf(stderr, "action=%s\n", action);
+ /* 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 */
+ if (secondConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, secondConsole);
+ if (thirdConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, thirdConsole);
+ if (fourthConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, fourthConsole);
+ /* Start a shell on tty1 */
+ new_initAction(RESPAWN, SHELL, console);
+ } else {
+ /* Not in single user mode -- see what inittab says */
- /* Ok, now do the right thing */
+ /* NOTE that if BB_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 */
+ parse_inittab();
+ }
- }
- return;
+ /* Make the command line just say "init" -- thats all, nothing else */
+ fixup_argv(argc, argv, "init");
-choke:
- //message(CONSOLE, "Bad entry:");
- fprintf(stderr, "Bad inittab entry: %s", buf);
- while (1) sleep(1);
-
-}
+ /* Now run everything that needs to be run */
+ /* First run the sysinit command */
+ for (a = initActionList; a; a = tmp) {
+ tmp = a->nextPtr;
+ if (a->action == SYSINIT) {
+ waitfor(a->process, a->console, FALSE);
+ /* Now remove the "sysinit" entry from the list */
+ delete_initAction(a);
+ }
+ }
+ /* Next run anything that wants to block */
+ for (a = initActionList; a; a = tmp) {
+ tmp = a->nextPtr;
+ if (a->action == WAIT) {
+ waitfor(a->process, a->console, FALSE);
+ /* Now remove the "wait" entry from the list */
+ delete_initAction(a);
+ }
+ }
+ /* 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);
+ }
+ }
+ /* If there is nothing else to do, stop */
+ if (initActionList == NULL) {
+ message(LOG | CONSOLE,
+ "No more tasks for init -- sleeping forever.\n");
+ while (1)
+ sleep(1);
+ }
-extern int init_main(int argc, char **argv)
-{
- parse_inittab();
- exit( TRUE);
+ /* 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;
+ }
+ }
+ }
+ /* 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) {
+ if (a->pid == wpid) {
+ a->pid = 0;
+ message(LOG,
+ "Process '%s' (pid %d) exited. Scheduling it for restart.\n",
+ a->process, wpid);
+ }
+ }
+ }
+ sleep(1);
+ }
}
-
-#endif
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
projects / oweals / busybox.git / blobdiff