Foo
This commit is contained in:
Eric Andersen
parent
0460ff2e5d
commit
8a8fbb87f7
126
init.c
126
init.c
@ -51,9 +51,6 @@
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#define INITSCRIPT "/etc/init.d/rcS" /* Initscript. */
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#define PATH_DEFAULT "PATH=/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin"
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static int maxproclen=0;
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static char* argv0;
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static char *console = CONSOLE;
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static char *second_terminal = "/dev/tty2";
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static char *log = "/dev/tty3";
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@ -69,8 +66,10 @@ int device_open(char* device, int mode)
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/* Retry up to 5 times */
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for (f = 0; f < 5; f++)
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if ((fd = open(device, m)) >= 0) break;
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if (fd < 0) return fd;
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if ((fd = open(device, m)) >= 0)
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break;
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if (fd < 0)
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return fd;
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/* Set original flags. */
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if (m != mode)
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fcntl(fd, F_SETFL, mode);
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@ -82,12 +81,14 @@ void message(char* device, char *fmt, ...)
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{
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int fd;
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va_list arguments;
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if ((fd = device_open(device, O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
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va_start(arguments, fmt);
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vdprintf(fd, fmt, arguments);
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va_end(arguments);
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}
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close(fd);
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} else
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vprintf(fmt, arguments);
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}
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/* Set terminal settings to reasonable defaults */
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@ -97,7 +98,7 @@ void set_term()
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struct termios tty;
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if ((fd = device_open(console, O_RDWR | O_NOCTTY)) < 0) {
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message(log, "can't open %s", console);
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message(log, "can't open %s\n", console);
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return;
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}
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ioctl(fd, TCGETS, &tty);
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@ -125,8 +126,7 @@ void set_term()
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close(fd);
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}
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static int
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mem_total()
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static int mem_total()
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{
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char s[80];
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char *p;
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@ -144,8 +144,7 @@ mem_total()
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return -1;
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}
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static void
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set_free_pages()
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static void set_free_pages()
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{
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char s[80];
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FILE *f;
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@ -162,8 +161,7 @@ set_free_pages()
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}
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static void
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console_init()
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static void console_init()
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{
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int fd;
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int tried_devcons = 0;
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@ -195,8 +193,7 @@ console_init()
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close(fd);
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}
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static int
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waitfor(int pid)
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static int waitfor(int pid)
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{
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int status, wpid;
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@ -208,8 +205,7 @@ waitfor(int pid)
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return wpid;
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}
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static int
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run(const char* command, char* terminal, int get_enter)
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static int run(const char *command, char *terminal, int get_enter)
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{
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int f, pid;
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char *args[16];
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@ -224,10 +220,12 @@ run(const char* command, char* terminal, int get_enter)
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ptr = buf;
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for (f = 1; f < 15; f++) {
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/* Skip white space */
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while(*ptr == ' ' || *ptr == '\t') ptr++;
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while (*ptr == ' ' || *ptr == '\t')
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ptr++;
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args[f] = ptr;
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/* May be trailing space.. */
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if (*ptr == 0) break;
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if (*ptr == 0)
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break;
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/* Skip this `word' */
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while (*ptr && *ptr != ' ' && *ptr != '\t' && *ptr != '#')
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ptr++;
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@ -251,7 +249,7 @@ run(const char* command, char* terminal, int get_enter)
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setsid();
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if ((f = device_open(terminal, O_RDWR | O_NOCTTY)) < 0) {
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message( log, "open(%s) failed: %s", terminal, strerror(errno));
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message(log, "open(%s) failed: %s\n", terminal, strerror(errno));
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return -1;
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}
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dup(f);
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@ -271,15 +269,18 @@ run(const char* command, char* terminal, int get_enter)
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char c;
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write(1, press_enter, sizeof(press_enter) - 1);
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read(0, &c, 1);
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message(console, "Got an enter\r\n");
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}
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/* Log the process name and args */
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message(log, "Executing '%s'\n", command);
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message(console, "Executing ");
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message(console, "'%s'\r\n", command);
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/* Now run it. This should take over the PID, so nothing
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* further in init.c should be run by this PID. */
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execvp(args[1], args + 1);
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message(console, "Hmm. Trying as a script.\r\n");
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/* If shell scripts are not executed, force the issue */
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if (errno == ENOEXEC) {
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char buf[256];
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@ -291,18 +292,17 @@ run(const char* command, char* terminal, int get_enter)
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args[4] = NULL;
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execvp(args[1], args + 1);
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}
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message(log, "Could not execute '%s'\n", command, strerror(errno));
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message(console, "Could not execute '%s'\n", command);
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exit(-1);
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}
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return pid;
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}
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#ifndef DEBUG_INIT
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static void
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shutdown_system(void)
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static void shutdown_system(void)
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{
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message(console, "The system is going down NOW !!");
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message(console, "The system is going down NOW !!\r\n");
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sync();
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/* Allow Ctrl-Alt-Del to reboot system. */
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reboot(RB_ENABLE_CAD);
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@ -325,42 +325,26 @@ shutdown_system(void)
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}
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}
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static void
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halt_signal(int sig)
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static void halt_signal(int sig)
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{
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shutdown_system();
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message(console, "The system is halted. Press CTRL-ALT-DEL or turn off power\r\n");
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message(console,
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"The system is halted. Press CTRL-ALT-DEL or turn off power\r\n");
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reboot(RB_POWER_OFF);
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exit(0);
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}
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static void
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reboot_signal(int sig)
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static void reboot_signal(int sig)
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{
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shutdown_system();
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message(console, "Please stand by while rebooting the system.\r\n");
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reboot(RB_AUTOBOOT);
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exit(0);
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}
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#endif
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int setproctitle(char *fmt, ...)
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{
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va_list ap;
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int len;
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char buf[256];
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buf[0] = 0;
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va_start(ap, fmt);
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len = vsprintf(buf, fmt, ap);
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va_end(ap);
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memset(argv0, 0, maxproclen + 1);
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strncpy(argv0, buf, maxproclen);
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return len;
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}
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extern int
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init_main(int argc, char * * argv)
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extern int init_main(int argc, char **argv)
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{
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int run_rc = TRUE;
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int pid1 = 0;
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@ -370,13 +354,10 @@ init_main(int argc, char * * argv)
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const char *shell_commands = SHELL;
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const char *tty0_commands = init_commands;
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const char *tty1_commands = shell_commands;
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char *hello_msg_format =
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"init started: BusyBox v%s (%s) multi-call binary\r\n";
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const char *no_memory =
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"Sorry, your computer does not have enough memory.\n";
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/* For later use */
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argv0 = argv[0];
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maxproclen = strlen(argv[0]);
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setproctitle("init [boot]");
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"Sorry, your computer does not have enough memory.\r\n";
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#ifndef DEBUG_INIT
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@ -411,20 +392,16 @@ init_main(int argc, char * * argv)
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putenv(PATH_DEFAULT);
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/* Hello world */
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message(console, "%s started: BusyBox v%s (%s) multi-call binary",
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argv[0], BB_VER, BB_BT);
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message(log, "%s started: BusyBox v%s (%s) multi-call binary",
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argv[0], BB_VER, BB_BT);
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message(log, hello_msg_format, BB_VER, BB_BT);
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message(console, hello_msg_format, BB_VER, BB_BT);
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/* Mount /proc */
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message(console, "Mounting /proc: \n");
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if (mount("/proc", "/proc", "proc", 0, 0)) {
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message(log, "%s: could not mount /proc!\n", argv[0]);
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message(console, "failed!\n");
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message(log, "Mounting /proc: failed!\n");
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message(console, "Mounting /proc: failed!\r\n");
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} else {
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message(console, "Mounting /proc: done.\r\n");
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}
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message(console, "done.\n");
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/* Make sure there is enough memory to do something useful */
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set_free_pages();
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@ -433,25 +410,27 @@ init_main(int argc, char * * argv)
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retval = stat("/etc/fstab", &statbuf);
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if (retval) {
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message(console, "%s", no_memory);
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while (1) { sleep(1);}
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while (1) {
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sleep(1);
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}
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} else {
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/* Try to turn on swap */
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waitfor(run("/bin/swapon -a", console, 0));
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if (mem_total() < 2000) {
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message(console, "%s", no_memory);
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while (1) { sleep(1);}
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while (1) {
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sleep(1);
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}
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}
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}
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}
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/* Check if we are supposed to be in single user mode */
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if (!strcmp(argv[1], "single") || !strcmp(argv[1], "-s") || !strcmp(argv[1], "1")) {
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if ( argc > 1 && (!strcmp(argv[1], "single") ||
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!strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
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run_rc = FALSE;
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tty0_commands = shell_commands;
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tty1_commands = 0;
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setproctitle("init [S]");
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} else {
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setproctitle("init [1]");
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}
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/* Make sure an init script exists before trying to run it */
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@ -467,20 +446,23 @@ init_main(int argc, char * * argv)
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int wpid;
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int status;
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if ( pid1 == 0 && *tty0_commands ) {
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if (pid1 == 0 && tty0_commands) {
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pid1 = run(tty0_commands, console, 1);
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}
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if ( pid2 == 0 && *tty1_commands ) {
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if (pid2 == 0 && tty1_commands) {
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pid2 = run(tty1_commands, second_terminal, 1);
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}
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wpid = wait(&status);
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if (wpid > 0 && wpid != pid1) {
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message(log, "pid %d exited, status=%x.\n", wpid, status);
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}
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/* Don't respawn an init script if it exits */
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if (run_rc == FALSE && wpid == pid1) {
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pid1 = 0;
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}
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if (wpid == pid2) {
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pid2 = 0;
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}
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sleep(1);
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}
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}
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126
init/init.c
126
init/init.c
@ -51,9 +51,6 @@
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#define INITSCRIPT "/etc/init.d/rcS" /* Initscript. */
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#define PATH_DEFAULT "PATH=/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin"
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static int maxproclen=0;
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static char* argv0;
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static char *console = CONSOLE;
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static char *second_terminal = "/dev/tty2";
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static char *log = "/dev/tty3";
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@ -69,8 +66,10 @@ int device_open(char* device, int mode)
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/* Retry up to 5 times */
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for (f = 0; f < 5; f++)
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if ((fd = open(device, m)) >= 0) break;
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if (fd < 0) return fd;
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if ((fd = open(device, m)) >= 0)
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break;
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if (fd < 0)
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return fd;
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/* Set original flags. */
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if (m != mode)
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fcntl(fd, F_SETFL, mode);
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@ -82,12 +81,14 @@ void message(char* device, char *fmt, ...)
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{
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int fd;
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va_list arguments;
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if ((fd = device_open(device, O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
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va_start(arguments, fmt);
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vdprintf(fd, fmt, arguments);
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va_end(arguments);
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}
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close(fd);
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} else
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vprintf(fmt, arguments);
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}
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/* Set terminal settings to reasonable defaults */
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@ -97,7 +98,7 @@ void set_term()
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struct termios tty;
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if ((fd = device_open(console, O_RDWR | O_NOCTTY)) < 0) {
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message(log, "can't open %s", console);
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message(log, "can't open %s\n", console);
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return;
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}
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ioctl(fd, TCGETS, &tty);
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@ -125,8 +126,7 @@ void set_term()
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close(fd);
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}
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static int
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mem_total()
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static int mem_total()
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{
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char s[80];
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char *p;
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@ -144,8 +144,7 @@ mem_total()
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return -1;
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}
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static void
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set_free_pages()
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static void set_free_pages()
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{
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char s[80];
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FILE *f;
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@ -162,8 +161,7 @@ set_free_pages()
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}
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static void
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console_init()
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static void console_init()
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{
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int fd;
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int tried_devcons = 0;
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@ -195,8 +193,7 @@ console_init()
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close(fd);
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}
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static int
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waitfor(int pid)
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static int waitfor(int pid)
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{
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int status, wpid;
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@ -208,8 +205,7 @@ waitfor(int pid)
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return wpid;
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}
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static int
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run(const char* command, char* terminal, int get_enter)
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static int run(const char *command, char *terminal, int get_enter)
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{
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int f, pid;
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char *args[16];
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@ -224,10 +220,12 @@ run(const char* command, char* terminal, int get_enter)
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ptr = buf;
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for (f = 1; f < 15; f++) {
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/* Skip white space */
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while(*ptr == ' ' || *ptr == '\t') ptr++;
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while (*ptr == ' ' || *ptr == '\t')
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ptr++;
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args[f] = ptr;
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/* May be trailing space.. */
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if (*ptr == 0) break;
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if (*ptr == 0)
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break;
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/* Skip this `word' */
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while (*ptr && *ptr != ' ' && *ptr != '\t' && *ptr != '#')
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ptr++;
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@ -251,7 +249,7 @@ run(const char* command, char* terminal, int get_enter)
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setsid();
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if ((f = device_open(terminal, O_RDWR | O_NOCTTY)) < 0) {
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message( log, "open(%s) failed: %s", terminal, strerror(errno));
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message(log, "open(%s) failed: %s\n", terminal, strerror(errno));
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return -1;
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}
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dup(f);
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@ -271,15 +269,18 @@ run(const char* command, char* terminal, int get_enter)
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char c;
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write(1, press_enter, sizeof(press_enter) - 1);
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read(0, &c, 1);
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message(console, "Got an enter\r\n");
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}
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/* Log the process name and args */
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message(log, "Executing '%s'\n", command);
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message(console, "Executing ");
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message(console, "'%s'\r\n", command);
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/* Now run it. This should take over the PID, so nothing
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* further in init.c should be run by this PID. */
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execvp(args[1], args + 1);
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message(console, "Hmm. Trying as a script.\r\n");
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/* If shell scripts are not executed, force the issue */
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if (errno == ENOEXEC) {
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char buf[256];
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@ -291,18 +292,17 @@ run(const char* command, char* terminal, int get_enter)
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args[4] = NULL;
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execvp(args[1], args + 1);
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}
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message(log, "Could not execute '%s'\n", command, strerror(errno));
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message(console, "Could not execute '%s'\n", command);
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exit(-1);
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}
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return pid;
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}
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#ifndef DEBUG_INIT
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static void
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shutdown_system(void)
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static void shutdown_system(void)
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{
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message(console, "The system is going down NOW !!");
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message(console, "The system is going down NOW !!\r\n");
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sync();
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/* Allow Ctrl-Alt-Del to reboot system. */
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reboot(RB_ENABLE_CAD);
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@ -325,42 +325,26 @@ shutdown_system(void)
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}
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}
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static void
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halt_signal(int sig)
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static void halt_signal(int sig)
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{
|
||||
shutdown_system();
|
||||
message(console, "The system is halted. Press CTRL-ALT-DEL or turn off power\r\n");
|
||||
message(console,
|
||||
"The system is halted. Press CTRL-ALT-DEL or turn off power\r\n");
|
||||
reboot(RB_POWER_OFF);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
static void
|
||||
reboot_signal(int sig)
|
||||
static void reboot_signal(int sig)
|
||||
{
|
||||
shutdown_system();
|
||||
message(console, "Please stand by while rebooting the system.\r\n");
|
||||
reboot(RB_AUTOBOOT);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
int setproctitle(char *fmt, ...)
|
||||
{
|
||||
va_list ap;
|
||||
int len;
|
||||
char buf[256];
|
||||
|
||||
buf[0] = 0;
|
||||
va_start(ap, fmt);
|
||||
len = vsprintf(buf, fmt, ap);
|
||||
va_end(ap);
|
||||
memset(argv0, 0, maxproclen + 1);
|
||||
strncpy(argv0, buf, maxproclen);
|
||||
return len;
|
||||
}
|
||||
|
||||
extern int
|
||||
init_main(int argc, char * * argv)
|
||||
extern int init_main(int argc, char **argv)
|
||||
{
|
||||
int run_rc = TRUE;
|
||||
int pid1 = 0;
|
||||
@ -370,13 +354,10 @@ init_main(int argc, char * * argv)
|
||||
const char *shell_commands = SHELL;
|
||||
const char *tty0_commands = init_commands;
|
||||
const char *tty1_commands = shell_commands;
|
||||
char *hello_msg_format =
|
||||
"init started: BusyBox v%s (%s) multi-call binary\r\n";
|
||||
const char *no_memory =
|
||||
"Sorry, your computer does not have enough memory.\n";
|
||||
|
||||
/* For later use */
|
||||
argv0 = argv[0];
|
||||
maxproclen = strlen(argv[0]);
|
||||
setproctitle("init [boot]");
|
||||
"Sorry, your computer does not have enough memory.\r\n";
|
||||
|
||||
|
||||
#ifndef DEBUG_INIT
|
||||
@ -411,20 +392,16 @@ init_main(int argc, char * * argv)
|
||||
putenv(PATH_DEFAULT);
|
||||
|
||||
/* Hello world */
|
||||
message(console, "%s started: BusyBox v%s (%s) multi-call binary",
|
||||
argv[0], BB_VER, BB_BT);
|
||||
message(log, "%s started: BusyBox v%s (%s) multi-call binary",
|
||||
argv[0], BB_VER, BB_BT);
|
||||
|
||||
message(log, hello_msg_format, BB_VER, BB_BT);
|
||||
message(console, hello_msg_format, BB_VER, BB_BT);
|
||||
|
||||
/* Mount /proc */
|
||||
message(console, "Mounting /proc: \n");
|
||||
if (mount("/proc", "/proc", "proc", 0, 0)) {
|
||||
message(log, "%s: could not mount /proc!\n", argv[0]);
|
||||
message(console, "failed!\n");
|
||||
message(log, "Mounting /proc: failed!\n");
|
||||
message(console, "Mounting /proc: failed!\r\n");
|
||||
} else {
|
||||
message(console, "Mounting /proc: done.\r\n");
|
||||
}
|
||||
message(console, "done.\n");
|
||||
|
||||
|
||||
/* Make sure there is enough memory to do something useful */
|
||||
set_free_pages();
|
||||
@ -433,25 +410,27 @@ init_main(int argc, char * * argv)
|
||||
retval = stat("/etc/fstab", &statbuf);
|
||||
if (retval) {
|
||||
message(console, "%s", no_memory);
|
||||
while (1) { sleep(1);}
|
||||
while (1) {
|
||||
sleep(1);
|
||||
}
|
||||
} else {
|
||||
/* Try to turn on swap */
|
||||
waitfor(run("/bin/swapon -a", console, 0));
|
||||
if (mem_total() < 2000) {
|
||||
message(console, "%s", no_memory);
|
||||
while (1) { sleep(1);}
|
||||
while (1) {
|
||||
sleep(1);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Check if we are supposed to be in single user mode */
|
||||
if (!strcmp(argv[1], "single") || !strcmp(argv[1], "-s") || !strcmp(argv[1], "1")) {
|
||||
if ( argc > 1 && (!strcmp(argv[1], "single") ||
|
||||
!strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
|
||||
run_rc = FALSE;
|
||||
tty0_commands = shell_commands;
|
||||
tty1_commands = 0;
|
||||
setproctitle("init [S]");
|
||||
} else {
|
||||
setproctitle("init [1]");
|
||||
}
|
||||
|
||||
/* Make sure an init script exists before trying to run it */
|
||||
@ -467,20 +446,23 @@ init_main(int argc, char * * argv)
|
||||
int wpid;
|
||||
int status;
|
||||
|
||||
if ( pid1 == 0 && *tty0_commands ) {
|
||||
if (pid1 == 0 && tty0_commands) {
|
||||
pid1 = run(tty0_commands, console, 1);
|
||||
}
|
||||
if ( pid2 == 0 && *tty1_commands ) {
|
||||
if (pid2 == 0 && tty1_commands) {
|
||||
pid2 = run(tty1_commands, second_terminal, 1);
|
||||
}
|
||||
wpid = wait(&status);
|
||||
if (wpid > 0 && wpid != pid1) {
|
||||
message(log, "pid %d exited, status=%x.\n", wpid, status);
|
||||
}
|
||||
/* Don't respawn an init script if it exits */
|
||||
if (run_rc == FALSE && wpid == pid1) {
|
||||
pid1 = 0;
|
||||
}
|
||||
if (wpid == pid2) {
|
||||
pid2 = 0;
|
||||
}
|
||||
sleep(1);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user