diff options
author | Eric Andersen <andersen@codepoet.org> | 1999-11-02 02:59:44 +0300 |
---|---|---|
committer | Eric Andersen <andersen@codepoet.org> | 1999-11-02 02:59:44 +0300 |
commit | 2f6c04f63c55a03366dfd5848f00bda664c9a90d (patch) | |
tree | 3e9c595c46a1032cc1bd4d20694c8a0edfd643f9 /init.c | |
parent | ff719d663e49ab3abb8060ad93e62b160029f63b (diff) |
Ha! Got init working.
-Erik
Diffstat (limited to 'init.c')
-rw-r--r-- | init.c | 98 |
1 files changed, 53 insertions, 45 deletions
@@ -42,14 +42,15 @@ #include <sys/ioctl.h> /* Turn this on to debug init so it won't reboot when killed */ -#define DEBUG_INIT +//#define DEBUG_INIT #define CONSOLE "/dev/console" /* Logical system console */ #define VT_PRIMARY "/dev/tty0" /* Virtual console master */ #define VT_SECONDARY "/dev/tty1" /* Virtual console master */ #define VT_LOG "/dev/tty2" /* Virtual console master */ #define SHELL "/bin/sh" /* Default shell */ -#define INITSCRIPT "/etc/init.d/rcS" /* Initscript. */ +//#define INITSCRIPT "/etc/init.d/rcS" /* Initscript. */ +#define INITSCRIPT "/tmp/foo.sh" #define PATH_DEFAULT "PATH=/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin" static char *console = CONSOLE; @@ -218,8 +219,9 @@ static int waitfor(int pid) static pid_t run(const char * const* command, char *terminal, int get_enter) { - int i, f; + int fd; pid_t pid; + const char * const* cmd = command; static const char press_enter[] = "\nPlease press Enter to activate this console. "; @@ -230,13 +232,22 @@ static pid_t run(const char * const* command, close(2); setsid(); - f=open(terminal, O_RDWR); - dup(f); - dup(f); + /* Reset signal handlers set for parent process */ + signal(SIGUSR1, SIG_DFL); + signal(SIGUSR2, SIG_DFL); + signal(SIGINT, SIG_DFL); + signal(SIGTERM, SIG_DFL); + + if ((fd = device_open(terminal, O_RDWR)) < 0) { + message(log, "Bummer, can't open %s\r\n", terminal); + exit(-1); + } + dup(fd); + dup(fd); tcsetpgrp(0, getpgrp()); set_term(0); - if (get_enter) { + 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 @@ -251,51 +262,45 @@ static pid_t run(const char * const* command, } /* Log the process name and args */ - + message(log, "Executing pid(%d): '", getpid()); + while ( *cmd) message(log, "%s ", *cmd++); + message(log, "'\r\n"); + /* Now run it. The new program will take over this PID, * so nothing further in init.c should be run. */ - message(log, "Executing '%s', pid(%d)\r\n", *command, getpid()); execvp(*command, (char**)command+1); - message(log, "Hmm. Trying as a script.\r\n"); - /* If shell scripts are not executed, force the issue */ - if (errno == ENOEXEC) { - char * args[16]; - args[0] = SHELL; - args[1] = "-c"; - args[2] = "exec"; - for( i=0 ; i<16 && command[i]; i++) - args[3+i] = (char*)command[i]; - args[i] = NULL; - execvp(*args, (char**)args+1); - } - message(log, "Could not execute '%s'\n", command); + message(log, "Bummer, could not execute '%s'\n", command); exit(-1); } return pid; } -#ifndef DEBUG_INIT static void shutdown_system(void) { - const char* const swap_off_cmd[] = { "/bin/swapoff", "-a", 0}; - const char* const umount_cmd[] = { "/bin/umount", "-a", "-n", 0}; + const char* const swap_off_cmd[] = { "swapoff", "swapoff", "-a", 0}; + const char* const umount_cmd[] = { "umount", "umount", "-a", "-n", 0}; message(console, "The system is going down NOW !!\r\n"); sync(); +#ifndef DEBUG_INIT /* Allow Ctrl-Alt-Del to reboot system. */ reboot(RB_ENABLE_CAD); - +#endif /* 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); - waitfor(run( swap_off_cmd, console, 0)); - waitfor(run( umount_cmd, console, 0)); + waitfor(run( swap_off_cmd, log, FALSE)); + waitfor(run( umount_cmd, log, FALSE)); sync(); if (get_kernel_revision() <= 2 * 65536 + 2 * 256 + 11) { /* Removed bdflush call, kupdate in kernels >2.2.11 */ @@ -309,7 +314,9 @@ static void halt_signal(int sig) shutdown_system(); message(console, "The system is halted. Press CTRL-ALT-DEL or turn off power\r\n"); +#ifndef DEBUG_INIT reboot(RB_POWER_OFF); +#endif exit(0); } @@ -317,45 +324,44 @@ static void reboot_signal(int sig) { shutdown_system(); message(console, "Please stand by while rebooting the system.\r\n"); +#ifndef DEBUG_INIT reboot(RB_AUTOBOOT); +#endif exit(0); } -#endif extern int init_main(int argc, char **argv) { int run_rc = TRUE; + int wait_for_enter = FALSE; pid_t pid1 = 0; pid_t pid2 = 0; struct stat statbuf; - const char* const swap_on_cmd[] = { "/bin/swapon", " -a ", 0}; - const char* const init_commands[] = { SHELL, " -c", " exec ", INITSCRIPT, 0}; - const char* const shell_commands[] = { SHELL, " -", 0}; + const char* const swap_on_cmd[] = { "/bin/swapon", "swapon", "-a", 0}; + const char* const init_commands[] = { INITSCRIPT, INITSCRIPT, 0}; + const char* const shell_commands[] = { SHELL, "-" SHELL, 0}; const char* const* tty0_commands = init_commands; const char* const* tty1_commands = shell_commands; -#ifndef DEBUG_INIT +#ifdef DEBUG_INIT char *hello_msg_format = - "init started: BusyBox v%s (%s) multi-call binary\r\n"; + "init(%d) started: BusyBox v%s (%s) multi-call binary\r\n"; #else char *hello_msg_format = - "init(%d) started: BusyBox v%s (%s) multi-call binary\r\n"; + "init started: BusyBox v%s (%s) multi-call binary\r\n"; #endif const char *no_memory = "Sorry, your computer does not have enough memory.\r\n"; -#ifndef DEBUG_INIT - /* Set up sig handlers */ + /* Set up sig handlers -- be sure to + * clear all of these in run() */ signal(SIGUSR1, halt_signal); - signal(SIGSEGV, halt_signal); - signal(SIGPWR, halt_signal); - signal(SIGALRM, halt_signal); - signal(SIGHUP, halt_signal); signal(SIGUSR2, reboot_signal); signal(SIGINT, reboot_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... */ +#ifndef DEBUG_INIT reboot(RB_DISABLE_CAD); #endif /* Figure out where the default console should be */ @@ -383,7 +389,7 @@ extern int init_main(int argc, char **argv) /* Mount /proc */ - if (mount("/proc", "/proc", "proc", 0, 0) == 0) { + if (mount ("proc", "/proc", "proc", 0, 0) == 0) { message(log, "Mounting /proc: done.\n"); message(console, "Mounting /proc: done.\n"); } else { @@ -403,7 +409,7 @@ extern int init_main(int argc, char **argv) } } else { /* Try to turn on swap */ - waitfor(run(swap_on_cmd, console, 0)); + waitfor(run(swap_on_cmd, log, FALSE)); if (mem_total() < 2000) { message(console, "%s", no_memory); while (1) { @@ -417,12 +423,14 @@ extern int init_main(int argc, char **argv) if ( argc > 1 && (!strcmp(argv[1], "single") || !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) { run_rc = FALSE; + wait_for_enter = TRUE; tty0_commands = shell_commands; tty1_commands = shell_commands; } /* Make sure an init script exists before trying to run it */ if (run_rc == TRUE && stat(INITSCRIPT, &statbuf)) { + wait_for_enter = TRUE; tty0_commands = shell_commands; tty1_commands = shell_commands; } @@ -435,10 +443,10 @@ extern int init_main(int argc, char **argv) int status; if (pid1 == 0 && tty0_commands) { - pid1 = run(tty0_commands, console, 1); + pid1 = run(tty0_commands, console, wait_for_enter); } if (pid2 == 0 && tty1_commands) { - pid2 = run(tty1_commands, second_terminal, 1); + pid2 = run(tty1_commands, second_terminal, TRUE); } wpid = wait(&status); if (wpid > 0 ) { |