#include <sys/wait.h>
#include <sys/reboot.h>
-#if ENABLE_SYSLOGD
+#if ENABLE_FEATURE_INIT_SYSLOG
# include <sys/syslog.h>
#endif
/* Static variables */
static struct init_action *init_action_list = NULL;
-#if !ENABLE_SYSLOGD
+#if !ENABLE_FEATURE_INIT_SYSLOG
static const char *log_console = VC_5;
#endif
#if !ENABLE_DEBUG_INIT
__attribute__ ((format(printf, 2, 3)));
static void message(int device, const char *fmt, ...)
{
-#if !ENABLE_SYSLOGD
+#if !ENABLE_FEATURE_INIT_SYSLOG
static int log_fd = -1;
#endif
msg[sizeof(msg) - 2] = '\0';
l = strlen(msg);
-#if ENABLE_SYSLOGD
+#if ENABLE_FEATURE_INIT_SYSLOG
/* Log the message to syslogd */
if (device & L_LOG) {
/* don't out "\r" */
}
/* Set terminal settings to reasonable defaults */
-static void set_term(void)
+static void set_sane_term(void)
{
struct termios tty;
* if TERM is set to linux (the default) */
if (!s || strcmp(s, "linux") == 0)
putenv((char*)"TERM=vt102");
-#if !ENABLE_SYSLOGD
+#if !ENABLE_FEATURE_INIT_SYSLOG
log_console = NULL;
#endif
} else if (!s)
{
/* 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",
+ 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);
#else
_exit(2);
#endif
+ } else {
+ dup2(fd, 0);
+ dup2(fd, 1);
+ dup2(fd, 2);
+ if (fd > 2) close(fd);
}
}
- close(1);
- close(2);
- set_term();
- dup(0);
- dup(0);
+ set_sane_term();
}
static pid_t run(const struct init_action *a)
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 */
- 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(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();
+ 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 */
- open_stdio_to_tty(a->terminal, 1);
+ /* 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)) {
+ /* 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);
- }
+ /* Now fork off another process to just hang around */
+ if ((pid = fork()) < 0) {
+ message(L_LOG | L_CONSOLE, "Can't fork");
+ _exit(1);
+ }
- if (pid > 0) {
+ 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);
+ /* 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);
- waitfor(NULL, pid);
- /* See if stealing the controlling tty back is necessary */
- if (tcgetpgrp(0) != getpid())
- _exit(0);
+ 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(L_LOG | L_CONSOLE, "can't fork");
- _exit(1);
- }
- if (pid == 0) {
- setsid();
- ioctl(0, TIOCSCTTY, 1);
- _exit(0);
- }
- waitfor(NULL, pid);
+ /* Use a temporary process to steal the controlling tty. */
+ if ((pid = fork()) < 0) {
+ message(L_LOG | L_CONSOLE, "Can't fork");
+ _exit(1);
+ }
+ if (pid == 0) {
+ setsid();
+ ioctl(0, TIOCSCTTY, 1);
_exit(0);
}
-
- /* Now fall though to actually execute things */
+ waitfor(NULL, pid);
+ _exit(0);
}
- /* See if any special /bin/sh requiring characters are present */
- if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
- cmd[0] = (char *)DEFAULT_SHELL;
- cmd[1] = (char*)"-c";
- cmd[2] = strcat(strcpy(buf, "exec "), a->command);
- cmd[3] = NULL;
- } else {
- /* Convert command (char*) into cmd (char**, one word per string) */
- strcpy(buf, a->command);
- s = buf;
- for (tmpCmd = buf, i = 0; (tmpCmd = strsep(&s, " \t")) != NULL;) {
- if (*tmpCmd != '\0') {
- cmd[i] = tmpCmd;
- i++;
- }
+ /* Now fall though to actually execute things */
+ }
+
+ /* See if any special /bin/sh requiring characters are present */
+ if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != 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;
}
+ 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 = 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);
- }
+ 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*/);
+ /* 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
- }
+ }
#if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__)
- 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(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')
- ;
- }
+ if (a->action & ASKFIRST) {
+ static const char press_enter[] =
+#ifdef CUSTOMIZED_BANNER
+#include CUSTOMIZED_BANNER
#endif
-
- /* Log the process name and args */
- message(L_LOG, "starting pid %d, tty '%s': '%s'",
- getpid(), a->terminal, cmdpath);
+ "\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 ENABLE_FEATURE_INIT_COREDUMPS
- {
- struct stat sb;
- if (stat(CORE_ENABLE_FLAG_FILE, &sb) == 0) {
- struct rlimit limit;
+ {
+ 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);
- }
+ 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. */
- 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);
}
- 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, pid_t pid)
/* remove unused entrys */
for (a = init_action_list; a; a = tmp) {
tmp = a->next;
- if (a->action & (ONCE | SYSINIT | WAIT ) &&
- a->pid == 0 ) {
+ if ((a->action & (ONCE | SYSINIT | WAIT)) && a->pid == 0) {
delete_init_action(a);
}
}
/* Figure out where the default console should be */
console_init();
- set_term();
+ set_sane_term();
chdir("/");
setsid();
{
projects / oweals / busybox.git / blobdiff