#include <sys/wait.h>
#include <sys/reboot.h>
-#include "init_shared.h"
-
#if ENABLE_SYSLOGD
# 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 */
-};
-enum { VT_GETSTATE = 0x5603 }; /* get global vt state info */
-
-/* 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];
-};
+#define CONSOLE_NAME_SIZE 32
+#define MAXENV 16 /* Number of env. vars */
#ifndef _PATH_STDPATH
#define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
#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_name[CONSOLE_BUFF_SIZE] = DEV_CONSOLE;
#if !ENABLE_SYSLOGD
static const char *log_console = VC_5;
__attribute__ ((format(printf, 2, 3)));
static void message(int device, const char *fmt, ...)
{
- va_list arguments;
- int l;
- RESERVE_CONFIG_BUFFER(msg, 1024);
#if !ENABLE_SYSLOGD
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, 1024 - 2, fmt, arguments) + 1;
+ va_start(arguments, fmt);
+ vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments);
va_end(arguments);
+ msg[sizeof(msg) - 2] = '\0';
+ l = strlen(msg);
#if ENABLE_SYSLOGD
/* Log the message to syslogd */
if (device & L_LOG) {
- /* don`t out "\r\n" */
+ /* don't out "\r" */
openlog(applet_name, 0, LOG_DAEMON);
- syslog(LOG_INFO, "%s", msg + 1);
+ 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) {
- log_fd = device_open(log_console, O_WRONLY | O_NONBLOCK | O_NOCTTY);
- if (log_fd < 0) {
- log_fd = -2;
- bb_error_msg("bummer, can't log to %s!", log_console);
- device = L_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 & L_LOG) {
full_write(log_fd, msg, l);
+ if (log_fd == 2)
+ return; /* don't print dup messages */
}
#endif
if (device & L_CONSOLE) {
- int fd = device_open(DEV_CONSOLE,
- O_WRONLY | O_NOCTTY | O_NONBLOCK);
- /* Always send console messages to /dev/console so people will see them. */
- if (fd >= 0) {
- full_write(fd, msg, l);
- close(fd);
-#if ENABLE_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
- }
+ /* Send console messages to console so people will see them. */
+ full_write(2, msg, l);
}
- RELEASE_CONFIG_BUFFER(msg);
}
/* Set terminal settings to reasonable defaults */
tty.c_cflag &= CBAUD | CBAUDEX | CSIZE | CSTOPB | PARENB | PARODD;
tty.c_cflag |= CREAD | HUPCL | CLOCAL;
-
/* input modes */
tty.c_iflag = ICRNL | IXON | IXOFF;
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_name, s, sizeof(console_name));
- } 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_name, sizeof(console_name) - 1, SC_FORMAT, sr.line);
- } else if (ioctl(0, VT_GETSTATE, &vt) == 0) {
- /* this is linux virtual tty */
- snprintf(console_name, sizeof(console_name) - 1, VC_FORMAT, vt.v_active);
- } else {
- strcpy(console_name, DEV_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_name, O_RDONLY | O_NONBLOCK)) < 0 && tried < 2) {
- /* Can't open selected console -- try
- logical system console and VT_MASTER */
- strcpy(console_name, (tried == 0 ? DEV_CONSOLE : CURRENT_VC));
- tried++;
- }
- if (fd < 0) {
- /* Perhaps we should panic here? */
-#if !ENABLE_SYSLOGD
- log_console =
-#endif
- strcpy(console_name, bb_dev_null);
- } 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((char*)"TERM=vt102");
+ 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_SYSLOGD
- log_console = console_name;
+ log_console = NULL;
#endif
- } else {
- if (s == NULL)
- putenv((char*)"TERM=linux");
- }
- close(fd);
- }
- messageD(L_LOG, "console=%s", console_name);
+ } else if (!s)
+ putenv((char*)"TERM=linux");
}
static void fixup_argv(int argc, char **argv, const char *new_argv0)
}
/* Open the new terminal device */
-static void open_new_terminal(const char* device, int fail) {
- struct stat sb;
-
- if ((device_open(device, O_RDWR)) < 0) {
- if (stat(device, &sb) != 0) {
- message(L_LOG | L_CONSOLE, "device '%s' does not exist", device);
- } else {
- message(L_LOG | L_CONSOLE, "Bummer, can't open %s", device);
- }
- if (fail)
- _exit(1);
- /* else */
+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]) {
+ close(0);
+ if ((device_open(tty_name, O_RDWR)) < 0) {
+ dup2(1, 0); /* restore fd #0 - avoid nasty surprises */
+ 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);
+ shutdown_signal(SIGUSR1);
#else
- _exit(2);
+ _exit(2);
#endif
+ }
}
+ close(1);
+ close(2);
+ set_term();
+ dup(0);
+ dup(0);
}
static pid_t run(const struct init_action *a)
sigprocmask(SIG_BLOCK, &nmask, &omask);
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 */
setsid();
/* Open the new terminal device */
- open_new_terminal(a->terminal, 1);
-
- /* Make sure the terminal will act fairly normal for us */
- set_term();
- /* Setup stdout, stderr for the new process so
- * they point to the supplied terminal */
- dup(0);
- dup(0);
+ 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. */
/* Now fork off another process to just hang around */
if ((pid = fork()) < 0) {
- message(L_LOG | L_CONSOLE, "Can't fork!");
+ message(L_LOG | L_CONSOLE, "can't fork");
_exit(1);
}
/* Use a temporary process to steal the controlling tty. */
if ((pid = fork()) < 0) {
- message(L_LOG | L_CONSOLE, "Can't fork!");
+ message(L_LOG | L_CONSOLE, "can't fork");
_exit(1);
}
if (pid == 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").
+ * 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;
/* Establish this process as session leader and
* (attempt) to make the tty (if any) a controlling tty.
*/
- (void) setsid();
- (void) ioctl(0, TIOCSCTTY, 0/*don't steal it*/);
+ setsid();
+ ioctl(0, TIOCSCTTY, 0 /*don't steal it*/);
#endif
}
* specifies.
*/
messageD(L_LOG, "Waiting for enter to start '%s'"
- "(pid %d, terminal %s)\n",
+ "(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, console %s: '%s'",
+ message(L_LOG, "starting pid %d, tty '%s': '%s'",
getpid(), a->terminal, cmdpath);
#if ENABLE_FEATURE_INIT_COREDUMPS
BB_EXECVP(cmdpath, cmd);
/* We're still here? Some error happened. */
- message(L_LOG | L_CONSOLE, "Bummer, cannot run '%s': %m", cmdpath);
+ message(L_LOG | L_CONSOLE, "Cannot run '%s': %s",
+ cmdpath, strerror(errno));
_exit(-1);
}
sigprocmask(SIG_SETMASK, &omask, NULL);
for (a = init_action_list; a; a = tmp) {
tmp = a->next;
if (a->action == action) {
- if (access(a->terminal, R_OK | W_OK)) {
+ /* 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);
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(L_CONSOLE | L_LOG, "The system is going down NOW !!");
- sync();
-
/* Send signals to every process _except_ pid 1 */
- message(L_CONSOLE | L_LOG, init_sending_format, "TERM");
+ message(L_CONSOLE | L_LOG, "Sending SIG%s to all processes", "TERM");
kill(-1, SIGTERM);
- sleep(1);
sync();
-
- message(L_CONSOLE | L_LOG, init_sending_format, "KILL");
- 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 ATTRIBUTE_UNUSED)
sigaddset(&unblock_signals, SIGTSTP);
sigprocmask(SIG_UNBLOCK, &unblock_signals, NULL);
- /* Close whatever files are open. */
- close(0);
- close(1);
- close(2);
-
/* Open the new terminal device */
- open_new_terminal(a->terminal, 0);
-
- /* Make sure the terminal will act fairly normal for us */
- set_term();
- /* Setup stdout, stderr on the supplied terminal */
- dup(0);
- dup(0);
+ 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(L_CONSOLE | L_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();
rb = RB_POWER_OFF;
}
message(L_CONSOLE | L_LOG, "Requesting system %s", m);
- sync();
-
/* allow time for last message to reach serial console */
sleep(2);
-
init_reboot(rb);
loop_forever();
}
{
struct init_action *new_action, *a, *last;
- if (*cons == '\0')
- cons = console_name;
-
if (strcmp(cons, bb_dev_null) == 0 && (action & ASKFIRST))
return;
- new_action = xzalloc(sizeof(struct init_action));
-
/* 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,
&& (strcmp(a->terminal, cons) == 0)
) {
a->action = action;
- free(new_action);
return;
}
last = a;
}
+
+ new_action = xzalloc(sizeof(struct init_action));
if (last) {
last->next = new_action;
} else {
strcpy(new_action->command, command);
new_action->action = action;
strcpy(new_action->terminal, cons);
- messageD(L_LOG | L_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);
}
#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 */
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);
}
}
fclose(file);
- return;
#endif /* FEATURE_USE_INITTAB */
}
{
struct init_action *a, *tmp;
- message(L_LOG, "Reloading /etc/inittab");
+ message(L_LOG, "reloading /etc/inittab");
/* disable old entrys */
for (a = init_action_list; a; a = a->next ) {
}
}
run_actions(RESPAWN);
- return;
}
#endif /* FEATURE_USE_INITTAB */
die_sleep = 30 * 24*60*60; /* if xmalloc will ever die... */
if (argc > 1 && !strcmp(argv[1], "-q")) {
- return kill(1,SIGHUP);
+ return kill(1, SIGHUP);
}
#if !ENABLE_DEBUG_INIT
/* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
- if (getpid() != 1 &&
- (!ENABLE_FEATURE_INITRD || !strstr(applet_name, "linuxrc")))
- {
+ if (getpid() != 1
+ && (!ENABLE_FEATURE_INITRD || !strstr(applet_name, "linuxrc"))
+ ) {
bb_show_usage();
}
/* Set up sig handlers -- be sure to
/* 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_name, O_RDWR | O_NOCTTY) == 0) {
- set_term();
- close(0);
- }
-
+ set_term();
chdir("/");
setsid();
{
if (argc > 1) setenv("RUNLEVEL", argv[1], 1);
/* Hello world */
- message(MAYBE_CONSOLE | L_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. */
if (ENABLE_SWAPONOFF) {
if (!sysinfo(&info) &&
(info.mem_unit ? : 1) * (long long)info.totalram < 1024*1024)
{
- message(L_CONSOLE, "Low memory: forcing swapon.");
+ 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 */
} 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(CONSOLE,"Unable to load SELinux Policy. Machine is in enforcing mode. Halting now.");
+ message(CONSOLE, "Cannot load SELinux Policy. Machine is in enforcing mode. Halting now.");
exit(1);
}
}
/* Set the pid to 0 so that the process gets
* restarted by run_actions() */
a->pid = 0;
- message(L_LOG, "Process '%s' (pid %d) exited. "
+ message(L_LOG, "process '%s' (pid %d) exited. "
"Scheduling it for restart.",
a->command, wpid);
}
projects / oweals / busybox.git / commitdiff