Oops. Forgot the usleep.c file.

[oweals/busybox.git] / init.c

diff --git a/init.c b/init.c
index f0124a22533a7ba61d77ddc9693e19261326faa1..d61d1c38eb214aa3dc00dde510447cedd820c281 100644 (file)
--- a/init.c
+++ b/init.c
@@ -28,31 +28,43 @@
 */
 
 #include "internal.h"
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <unistd.h>
+#include <asm/types.h>
 #include <errno.h>
-#include <signal.h>
-#include <termios.h>
+#include <linux/serial.h>              /* for serial_struct */
+#include <linux/version.h>
 #include <paths.h>
-#include <sys/types.h>
-#include <sys/fcntl.h>
-#include <sys/wait.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
+#include <sys/fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/kdaemon.h>
 #include <sys/mount.h>
 #include <sys/reboot.h>
-#include <sys/kdaemon.h>
-#include <sys/sysmacros.h>
-#include <asm/types.h>
-#include <linux/serial.h>              /* for serial_struct */
-#include <sys/vt.h>                            /* for vt_stat */
-#include <sys/ioctl.h>
 #include <sys/sysinfo.h>               /* For check_free_memory() */
-#include <linux/version.h>
 #ifdef BB_SYSLOGD
-#include <sys/syslog.h>
+# include <sys/syslog.h>
+#endif
+#include <sys/sysmacros.h>
+#include <sys/types.h>
+#include <sys/vt.h>                            /* for vt_stat */
+#include <sys/wait.h>
+#include <termios.h>
+#include <unistd.h>
+
+
+#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
 
 #ifndef KERNEL_VERSION
@@ -60,19 +72,19 @@
 #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 SHELL           "/bin/sh"      /* Default shell */
-#define INITTAB         "/etc/inittab" /* inittab file location */
+#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 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. */
+#define INIT_SCRIPT  "/etc/init.d/rcS"   /* Default sysinit script. */
 #endif
 
-#define LOG             0x1
-#define CONSOLE         0x2
+#define LOG     0x1
+#define CONSOLE 0x2
 
 /* Allowed init action types */
 typedef enum {
@@ -84,7 +96,7 @@ typedef enum {
        CTRLALTDEL
 } initActionEnum;
 
-/* And now a list of the actions we support in the version of init */
+/* A mapping between "inittab" action name strings and action type codes. */
 typedef struct initActionType {
        const char *name;
        initActionEnum action;
@@ -100,7 +112,7 @@ static const struct initActionType actions[] = {
        {0}
 };
 
-/* Set up a linked list of initactions, to be read from inittab */
+/* Set up a linked list of initActions, to be read from inittab */
 typedef struct initActionTag initAction;
 struct initActionTag {
        pid_t pid;
@@ -113,16 +125,17 @@ initAction *initActionList = NULL;
 
 
 static char *secondConsole = VT_SECONDARY;
-static char *log = VT_LOG;
-static int kernelVersion = 0;
-static char termType[32] = "TERM=linux";
-static char console[32] = _PATH_CONSOLE;
+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 */
-void message(int device, char *fmt, ...)
+/* Print a message to the specified device.
+ * Device may be bitwise-or'd from LOG | CONSOLE */
+static void message(int device, char *fmt, ...)
 {
        va_list arguments;
        int fd;
@@ -235,8 +248,7 @@ static int check_free_memory()
                return -1;
        }
 
-       return(info.freeram/1024);
-
+       return((info.totalram+info.totalswap)/1024);
 }
 
 static void console_init()
@@ -407,6 +419,18 @@ static pid_t run(char *command, char *terminal, int get_enter)
                        cmd[i] = NULL;
                }
 
+#if defined BB_FEATURE_INIT_COREDUMPS
+               {
+                       struct stat sb;
+                       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(cmd[0], cmd, environment);
@@ -738,7 +762,7 @@ void parse_inittab(void)
                        ++p;
                }
 
-               /* Now peal off the process field from the end
+               /* Now peel off the process field from the end
                 * of the string */
                q = strrchr(p, ':');
                if (q == NULL || *(q + 1) == '\0') {
@@ -749,7 +773,7 @@ void parse_inittab(void)
                        ++q;
                }
 
-               /* Now peal off the action field */
+               /* Now peel off the action field */
                r = strrchr(p, ':');
                if (r == NULL || *(r + 1) == '\0') {
                        message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
@@ -788,7 +812,7 @@ void parse_inittab(void)
                }
        }
        return;
-#endif
+#endif /* BB_FEATURE_USE_INITTAB */
 }
 
 
@@ -826,6 +850,9 @@ extern int init_main(int argc, char **argv)
        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();
 
@@ -834,6 +861,7 @@ extern int init_main(int argc, char **argv)
        close(1);
        close(2);
        set_term(0);
+       chdir("/");
        setsid();
 
        /* Make sure PATH is set to something sane */
@@ -879,7 +907,7 @@ extern int init_main(int argc, char **argv)
                 * of "askfirst" shells */
                parse_inittab();
        }
-       
+
        /* Fix up argv[0] to be certain we claim to be init */
        strncpy(argv[0], "init", strlen(argv[0])+1);
        if (argc > 1)