diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/init.c | 140 |
1 files changed, 76 insertions, 64 deletions
diff --git a/init/init.c b/init/init.c index 145452f..b775893 100644 --- a/init/init.c +++ b/init/init.c @@ -188,6 +188,7 @@ 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 */ static void message(int device, char *fmt, ...) @@ -393,6 +394,23 @@ static void console_init() } message(LOG, "console=%s\n", console); } + +static void fixup_argv(int argc, char **argv, char *new_argv0) +{ + int len; + /* Fix up argv[0] to be certain we claim to be init */ + len = strlen(argv[0]); + memset(argv[0], 0, len); + strncpy(argv[0], new_argv0, len); + + /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */ + len = 1; + while (argc > len) { + memset(argv[len], 0, strlen(argv[len])); + len++; + } +} + static pid_t run(char *command, char *terminal, int get_enter) { @@ -402,6 +420,7 @@ static pid_t run(char *command, char *terminal, int get_enter) char *tmpCmd, *s; char *cmd[255], *cmdpath; char buf[255]; + struct stat sb; static const char press_enter[] = #ifdef CUSTOMIZED_BANNER @@ -447,8 +466,7 @@ static pid_t run(char *command, char *terminal, int get_enter) signal(SIGHUP, SIG_DFL); if ((fd = device_open(terminal, O_RDWR)) < 0) { - struct stat statBuf; - if (stat(terminal, &statBuf) != 0) { + if (stat(terminal, &sb) != 0) { message(LOG | CONSOLE, "device '%s' does not exist.\n", terminal); exit(1); @@ -463,29 +481,6 @@ static pid_t run(char *command, char *terminal, int get_enter) tcsetpgrp(0, getpgrp()); set_term(0); - 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 - * 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. - */ -#ifdef DEBUG_INIT - message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n", - command, getpid(), terminal); -#endif - write(fileno(stdout), press_enter, sizeof(press_enter) - 1); - getc(stdin); - } - -#ifdef DEBUG_INIT - /* Log the process name and args */ - message(LOG, "Starting pid %d, console %s: '%s'\r\n", - getpid(), terminal, command); -#endif - /* See if any special /bin/sh requiring characters are present */ if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { cmd[0] = SHELL; @@ -497,7 +492,7 @@ static pid_t run(char *command, char *terminal, int get_enter) } else { /* Convert command (char*) into cmd (char**, one word per string) */ for (tmpCmd = command, i = 0; - (tmpCmd = strsep(&command, " \t")) != NULL;) { + (tmpCmd = strsep(&command, " \t")) != NULL;) { if (*tmpCmd != '\0') { cmd[i] = tmpCmd; tmpCmd++; @@ -507,53 +502,73 @@ static pid_t run(char *command, char *terminal, int get_enter) cmd[i] = NULL; } - cmdpath = cmd[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 + /* + 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; + if (*cmdpath == '-') { + char *s; - /* skip over the dash */ - ++cmdpath; + /* skip over the dash */ + ++cmdpath; - /* find the last component in the command pathname */ - s = get_last_path_component(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); - } - } + /* 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 (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 + * 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. + */ +#ifdef DEBUG_INIT + message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n", + cmd[0], getpid(), terminal); +#endif + write(fileno(stdout), press_enter, sizeof(press_enter) - 1); + getc(stdin); + } + +#ifdef DEBUG_INIT + /* Log the process name and args */ + message(LOG, "Starting pid %d, console %s: '%s'\r\n", + getpid(), terminal, command); +#endif #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); - } + 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(cmdpath, cmd, environment); + execve(cmdpath, cmd, environment); - /* We're still here? Some error happened. */ - message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath, - 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; @@ -937,11 +952,8 @@ extern int init_main(int argc, char **argv) parse_inittab(); } - /* Fix up argv[0] to be certain we claim to be init */ - argv[0]="init"; - - if (argc > 1) - argv[1][0]=0; + /* Make the command line just say "init" -- thats all, nothing else */ + fixup_argv(argc, argv, "init"); /* Now run everything that needs to be run */ |