#include "internal.h"
#include <stdio.h>
-#include <string.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 <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 <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>
+#include <sys/mount.h>
+#include <sys/types.h>
+#include <sys/wait.h>
#ifdef BB_SYSLOGD
-#include <sys/syslog.h>
+# include <sys/syslog.h>
#endif
-#ifndef KERNEL_VERSION
-#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
+#define bb_need_full_version
+#define BB_DECLARE_EXTERN
+#include "messages.c"
+
+/* 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 */
+};
+#define 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
+#define RB_HALT_SYSTEM 0xcdef0123
+#define RB_ENABLE_CAD 0x89abcdef
+#define RB_DISABLE_CAD 0
+#define RB_POWER_OFF 0x4321fedc
+#define RB_AUTOBOOT 0x01234567
+#if defined(__GLIBC__)
+#include <sys/reboot.h>
+ #define init_reboot(magic) reboot(magic)
+#else
+ #define init_reboot(magic) reboot(0xfee1dead, 672274793, magic)
+#endif
#endif
+#ifndef _PATH_STDPATH
+#define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
+#endif
+
+
+#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
+
+#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
-#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 */
+#if defined(__GLIBC__)
+#include <sys/kdaemon.h>
+#else
+static _syscall2(int, bdflush, int, func, 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. */
+#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 {
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;
{"wait", WAIT},
{"once", ONCE},
{"ctrlaltdel", CTRLALTDEL},
- {0}
+ {0, 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;
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 *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 */
-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, ...)
+ __attribute__ ((format (printf, 2, 3)));
+static void message(int device, char *fmt, ...)
{
va_list arguments;
int fd;
}
}
-
/* Set terminal settings to reasonable defaults */
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'
- };
tcgetattr(fd, &tty);
/* set control chars */
- memcpy(tty.c_cc, control_characters, sizeof(control_characters));
+ 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;
/* Make it be sane */
- //tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
- //tty.c_cflag |= HUPCL|CLOCAL;
+ tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
+ tty.c_cflag |= HUPCL|CLOCAL;
/* input modes */
tty.c_iflag = ICRNL | IXON | IXOFF;
{
struct sysinfo info;
+ /* Pre initialize mem_unit in case this kernel is something prior to
+ * the linux 2.4 kernel (which will actually fill in mem_unit... */
sysinfo(&info);
if (sysinfo(&info) != 0) {
- message(LOG, "Error checking free memory: %s\n", strerror(errno));
+ printf("Error checking free memory: %s\n", strerror(errno));
return -1;
}
-
- return(info.freeram/1024);
-
+ /* Kernels prior to 2.4.x will return info.mem_unit==0, so cope... */
+ if (info.mem_unit==0) {
+ info.mem_unit=1;
+ }
+ info.mem_unit*=1024;
+
+ /* Note: These values can in theory overflow a 32 bit unsigned long (i.e.
+ * mem >= Gib), but who puts more then 4GiB ram+swap on an embedded
+ * system? */
+ info.totalram/=info.mem_unit;
+ info.totalswap/=info.mem_unit;
+ return(info.totalram+info.totalswap);
}
static void console_init()
int fd;
int tried_devcons = 0;
int tried_vtprimary = 0;
+ struct vt_stat vt;
struct serial_struct sr;
char *s;
}
#endif
else {
- struct vt_stat vt;
-
/* 2.2 kernels: identify the real console backend and try to use it */
if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
/* this is a serial console */
/* Perhaps we should panic here? */
snprintf(console, sizeof(console) - 1, "/dev/null");
} else {
- /* check for serial console and disable logging to tty3 & running a
- * shell to tty2 */
+ /* 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)
int i, fd;
pid_t pid;
char *tmpCmd;
- char *cmd[255];
+ char *cmd[255], *cmdpath;
char buf[255];
static const char press_enter[] =
0
};
-
if ((pid = fork()) == 0) {
-#ifdef DEBUG_INIT
- pid_t shell_pgid = getpid();
-#endif
-
/* Clean up */
+ ioctl(0, TIOCNOTTY, 0);
close(0);
close(1);
close(2);
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
+ ioctl(0, TIOCSCTTY, 1);
tcsetpgrp(0, getpgrp());
set_term(0);
* be allowed to start a shell or whatever an init script
* specifies.
*/
- char c;
-
#ifdef DEBUG_INIT
+ pid_t shell_pgid = getpid();
message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
command, shell_pgid, terminal);
#endif
write(fileno(stdout), press_enter, sizeof(press_enter) - 1);
- read(fileno(stdin), &c, 1);
+ getc(stdin);
}
#ifdef DEBUG_INIT
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 == '-') {
+ char *s;
+
+ /* 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 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);
+ execve(cmdpath, cmd, environment);
- /* We're still here? Some error happened. */
- message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmd[0],
- strerror(errno));
+ /* We're still here? Some error happened. */
+ message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath,
+ strerror(errno));
exit(-1);
}
return pid;
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 */
- system("/sbin/swapon -a");
+ waitfor("swapon -a", console, FALSE);
if (check_free_memory() < 1000)
goto goodnight;
} else
signal(SIGHUP, SIG_DFL);
/* Allow Ctrl-Alt-Del to reboot system. */
- reboot(RB_ENABLE_CAD);
+ init_reboot(RB_ENABLE_CAD);
message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n");
sync();
run_lastAction();
sync();
- if (kernelVersion > 0 && kernelVersion <= 2 * 65536 + 2 * 256 + 11) {
+ if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) {
/* bdflush, kupdate not needed for kernels >2.2.11 */
bdflush(1, 0);
sync();
/* allow time for last message to reach serial console */
sleep(2);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
- if (sig == SIGUSR2)
- reboot(RB_POWER_OFF);
+ if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0))
+ init_reboot(RB_POWER_OFF);
else
-#endif
- reboot(RB_HALT_SYSTEM);
+ init_reboot(RB_HALT_SYSTEM);
exit(0);
}
/* allow time for last message to reach serial console */
sleep(2);
- reboot(RB_AUTOBOOT);
+ init_reboot(RB_AUTOBOOT);
exit(0);
}
#ifdef BB_FEATURE_USE_INITTAB
FILE *file;
char buf[256], lineAsRead[256], tmpConsole[256];
- char *p, *q, *r, *s;
+ char *id, *runlev, *action, *process, *eol;
const struct initActionType *a = actions;
int foundIt;
/* No inittab file -- set up some default behavior */
#endif
/* Swapoff on halt/reboot */
- new_initAction(CTRLALTDEL, "/sbin/swapoff -a > /dev/null 2>&1", console);
+ new_initAction(CTRLALTDEL, "/sbin/swapoff -a", console);
/* Umount all filesystems on halt/reboot */
- new_initAction(CTRLALTDEL, "/bin/umount -a -r > /dev/null 2>&1", console);
+ new_initAction(CTRLALTDEL, "/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);
while (fgets(buf, 255, file) != NULL) {
foundIt = FALSE;
- for (p = buf; *p == ' ' || *p == '\t'; p++);
- if (*p == '#' || *p == '\n')
+ /* 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 */
- q = strrchr(p, '\n');
- if (q != NULL)
- *q = '\0';
+ eol = strrchr(id, '\n');
+ if (eol != NULL)
+ *eol = '\0';
/* Keep a copy around for posterity's sake (and error msgs) */
strcpy(lineAsRead, buf);
- /* Grab the ID field */
- s = p;
- p = strchr(p, ':');
- if (p != NULL || *(p + 1) != '\0') {
- *p = '\0';
- ++p;
+ /* 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;
}
- /* Now peal off the process field from the end
- * of the string */
- q = strrchr(p, ':');
- if (q == NULL || *(q + 1) == '\0') {
+ /* Separate the runlevels from the action */
+ action = strchr(runlev, ':');
+ if (action == NULL || *(action + 1) == '\0') {
message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
continue;
} else {
- *q = '\0';
- ++q;
+ *action = '\0';
+ ++action;
}
- /* Now peal off the action field */
- r = strrchr(p, ':');
- if (r == NULL || *(r + 1) == '\0') {
+ /* 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 {
- ++r;
+ *process = '\0';
+ ++process;
}
/* Ok, now process it */
a = actions;
while (a->name != 0) {
- if (strcmp(a->name, r) == 0) {
- if (*s != '\0') {
+ if (strcmp(a->name, action) == 0) {
+ if (*id != '\0') {
struct stat statBuf;
strcpy(tmpConsole, "/dev/");
- strncat(tmpConsole, s, 200);
+ strncat(tmpConsole, id, 200);
if (stat(tmpConsole, &statBuf) != 0) {
message(LOG | CONSOLE,
"device '%s' does not exist. Did you read the directions?\n",
tmpConsole);
break;
}
- s = tmpConsole;
+ id = tmpConsole;
}
- new_initAction(a->action, q, s);
+ new_initAction(a->action, process, id);
foundIt = TRUE;
}
a++;
}
}
return;
-#endif
+#endif /* BB_FEATURE_USE_INITTAB */
}
int status;
#ifndef DEBUG_INIT
- /* Expect to be PID 1 if 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");
+ /* 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
+ )
+ {
+ 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");
}
/* Set up sig handlers -- be sure to
* clear all of these in run() */
signal(SIGUSR1, halt_signal);
- signal(SIGUSR2, reboot_signal);
+ signal(SIGUSR2, halt_signal);
signal(SIGINT, reboot_signal);
signal(SIGTERM, reboot_signal);
#if defined BB_FEATURE_INIT_CHROOT
/* Turn off rebooting via CTL-ALT-DEL -- we get a
* SIGINT on CAD so we can shut things down gracefully... */
- reboot(RB_DISABLE_CAD);
+ 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();
close(1);
close(2);
set_term(0);
+ chdir("/");
setsid();
/* Make sure PATH is set to something sane */
/* Hello world */
#ifndef DEBUG_INIT
- message(LOG,
- "init started: BusyBox v%s (%s) multi-call binary\r\n",
- BB_VER, BB_BT);
+ message(
+#if ! defined BB_FEATURE_EXTRA_QUIET
+ CONSOLE|
+#endif
+ LOG,
+ "init started: %s\r\n", full_version);
#else
- message(LOG,
- "init(%d) started: BusyBox v%s (%s) multi-call binary\r\n",
- getpid(), BB_VER, BB_BT);
+ message(
+#if ! defined BB_FEATURE_EXTRA_QUIET
+ CONSOLE|
+#endif
+ LOG,
+ "init(%d) started: %s\r\n", getpid(), full_version);
#endif
/* 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 */
+ /* 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 {
* 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)
sleep(1);
}
}
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
projects / oweals / busybox.git / blobdiff