Erik Andersen | ccc7488 | 2000-01-27 02:40:21 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Mini init implementation for busybox |
| 4 | * |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 5 | * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>. |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 6 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 7 | * Adjusted by so many folks, it's impossible to keep track. |
| 8 | * |
Rob Landley | 2edf526 | 2006-01-22 02:41:51 +0000 | [diff] [blame] | 9 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 10 | */ |
| 11 | |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 12 | #include "libbb.h" |
Eric Andersen | b186d98 | 1999-12-03 09:19:54 +0000 | [diff] [blame] | 13 | #include <paths.h> |
Eric Andersen | 85e5e72 | 2003-07-22 08:56:55 +0000 | [diff] [blame] | 14 | #include <sys/reboot.h> |
Eric Andersen | b01ed65 | 2003-06-27 17:08:15 +0000 | [diff] [blame] | 15 | |
Denis Vlasenko | ccd412d | 2007-03-05 19:55:30 +0000 | [diff] [blame] | 16 | #if ENABLE_FEATURE_INIT_SYSLOG |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 17 | # include <sys/syslog.h> |
| 18 | #endif |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 19 | |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 20 | #define INIT_BUFFS_SIZE 256 |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 21 | #define CONSOLE_NAME_SIZE 32 |
| 22 | #define MAXENV 16 /* Number of env. vars */ |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 23 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 24 | #if ENABLE_FEATURE_INIT_COREDUMPS |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 25 | /* |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 26 | * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 27 | * before processes are spawned to set core file size as unlimited. |
| 28 | * This is for debugging only. Don't use this is production, unless |
| 29 | * you want core dumps lying about.... |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 30 | */ |
| 31 | #define CORE_ENABLE_FLAG_FILE "/.init_enable_core" |
| 32 | #include <sys/resource.h> |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 33 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 34 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 35 | #define INITTAB "/etc/inittab" /* inittab file location */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 36 | #ifndef INIT_SCRIPT |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 37 | #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 38 | #endif |
Erik Andersen | 9c88cac | 1999-12-30 09:25:17 +0000 | [diff] [blame] | 39 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 40 | /* Allowed init action types */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 41 | #define SYSINIT 0x001 |
| 42 | #define RESPAWN 0x002 |
| 43 | #define ASKFIRST 0x004 |
| 44 | #define WAIT 0x008 |
| 45 | #define ONCE 0x010 |
| 46 | #define CTRLALTDEL 0x020 |
| 47 | #define SHUTDOWN 0x040 |
| 48 | #define RESTART 0x080 |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 49 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 50 | #define STR_SYSINIT "\x01" |
| 51 | #define STR_RESPAWN "\x02" |
| 52 | #define STR_ASKFIRST "\x04" |
| 53 | #define STR_WAIT "\x08" |
| 54 | #define STR_ONCE "\x10" |
| 55 | #define STR_CTRLALTDEL "\x20" |
| 56 | #define STR_SHUTDOWN "\x40" |
| 57 | #define STR_RESTART "\x80" |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 58 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 59 | /* Set up a linked list of init_actions, to be read from inittab */ |
| 60 | struct init_action { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 61 | struct init_action *next; |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 62 | pid_t pid; |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 63 | uint8_t action; |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 64 | char terminal[CONSOLE_NAME_SIZE]; |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 65 | char command[INIT_BUFFS_SIZE]; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 66 | }; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 67 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 68 | /* Static variables */ |
| 69 | static struct init_action *init_action_list = NULL; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 70 | |
Denis Vlasenko | ccd412d | 2007-03-05 19:55:30 +0000 | [diff] [blame] | 71 | #if !ENABLE_FEATURE_INIT_SYSLOG |
Denis Vlasenko | 4c97863 | 2007-02-03 03:31:13 +0000 | [diff] [blame] | 72 | static const char *log_console = VC_5; |
Eric Andersen | e707806 | 2002-07-29 08:00:16 +0000 | [diff] [blame] | 73 | #endif |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 74 | #if !ENABLE_DEBUG_INIT |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 75 | static sig_atomic_t got_cont = 0; |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 76 | #endif |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 77 | |
| 78 | enum { |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 79 | L_LOG = 0x1, |
| 80 | L_CONSOLE = 0x2, |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 81 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 82 | #if ENABLE_FEATURE_EXTRA_QUIET |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 83 | MAYBE_CONSOLE = 0x0, |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 84 | #else |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 85 | MAYBE_CONSOLE = L_CONSOLE, |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 86 | #endif |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 87 | |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 88 | #ifndef RB_HALT_SYSTEM |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 89 | RB_HALT_SYSTEM = 0xcdef0123, /* FIXME: this overflows enum */ |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 90 | RB_ENABLE_CAD = 0x89abcdef, |
| 91 | RB_DISABLE_CAD = 0, |
| 92 | RB_POWER_OFF = 0x4321fedc, |
| 93 | RB_AUTOBOOT = 0x01234567, |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 94 | #endif |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 95 | }; |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 96 | |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 97 | static const char *const environment[] = { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 98 | "HOME=/", |
Denis Vlasenko | f5f75c5 | 2007-06-12 22:35:19 +0000 | [diff] [blame] | 99 | bb_PATH_root_path, |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 100 | "SHELL=/bin/sh", |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 101 | "USER=root", |
| 102 | NULL |
| 103 | }; |
| 104 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 105 | /* Function prototypes */ |
| 106 | static void delete_init_action(struct init_action *a); |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 107 | static int waitfor(pid_t pid); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 108 | #if !ENABLE_DEBUG_INIT |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 109 | static void shutdown_signal(int sig); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 110 | #endif |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 111 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 112 | #if !ENABLE_DEBUG_INIT |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 113 | static void loop_forever(void) |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 114 | { |
| 115 | while (1) |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 116 | sleep(1); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 117 | } |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 118 | #endif |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 119 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 120 | /* Print a message to the specified device. |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 121 | * Device may be bitwise-or'd from L_LOG | L_CONSOLE */ |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 122 | #if ENABLE_DEBUG_INIT |
| 123 | #define messageD message |
| 124 | #else |
Denis Vlasenko | bf0a201 | 2006-12-26 10:42:51 +0000 | [diff] [blame] | 125 | #define messageD(...) do {} while (0) |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 126 | #endif |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 127 | static void message(int device, const char *fmt, ...) |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 128 | __attribute__ ((format(printf, 2, 3))); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 129 | static void message(int device, const char *fmt, ...) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 130 | { |
Denis Vlasenko | ccd412d | 2007-03-05 19:55:30 +0000 | [diff] [blame] | 131 | #if !ENABLE_FEATURE_INIT_SYSLOG |
Eric Andersen | 2223701 | 2003-01-23 07:08:26 +0000 | [diff] [blame] | 132 | static int log_fd = -1; |
| 133 | #endif |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 134 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 135 | va_list arguments; |
| 136 | int l; |
| 137 | char msg[128]; |
| 138 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 139 | msg[0] = '\r'; |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 140 | va_start(arguments, fmt); |
| 141 | vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments); |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 142 | va_end(arguments); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 143 | msg[sizeof(msg) - 2] = '\0'; |
| 144 | l = strlen(msg); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 145 | |
Denis Vlasenko | ccd412d | 2007-03-05 19:55:30 +0000 | [diff] [blame] | 146 | #if ENABLE_FEATURE_INIT_SYSLOG |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 147 | /* Log the message to syslogd */ |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 148 | if (device & L_LOG) { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 149 | /* don't out "\r" */ |
Denis Vlasenko | 8f8f268 | 2006-10-03 21:00:43 +0000 | [diff] [blame] | 150 | openlog(applet_name, 0, LOG_DAEMON); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 151 | syslog(LOG_INFO, "init: %s", msg + 1); |
Eric Andersen | 36adca8 | 2004-06-22 10:07:17 +0000 | [diff] [blame] | 152 | closelog(); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 153 | } |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 154 | msg[l++] = '\n'; |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 155 | msg[l] = '\0'; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 156 | #else |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 157 | msg[l++] = '\n'; |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 158 | msg[l] = '\0'; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 159 | /* Take full control of the log tty, and never close it. |
| 160 | * It's mine, all mine! Muhahahaha! */ |
| 161 | if (log_fd < 0) { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 162 | if (!log_console) { |
| 163 | log_fd = 2; |
Eric Andersen | 6a97990 | 2002-09-30 20:08:53 +0000 | [diff] [blame] | 164 | } else { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 165 | log_fd = device_open(log_console, O_WRONLY | O_NONBLOCK | O_NOCTTY); |
| 166 | if (log_fd < 0) { |
| 167 | bb_error_msg("can't log to %s", log_console); |
| 168 | device = L_CONSOLE; |
| 169 | } else { |
Denis Vlasenko | 96e1b38 | 2007-09-30 23:50:48 +0000 | [diff] [blame] | 170 | close_on_exec_on(log_fd); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 171 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 172 | } |
| 173 | } |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 174 | if (device & L_LOG) { |
Rob Landley | 5343747 | 2006-07-16 08:14:35 +0000 | [diff] [blame] | 175 | full_write(log_fd, msg, l); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 176 | if (log_fd == 2) |
| 177 | return; /* don't print dup messages */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 178 | } |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 179 | #endif |
| 180 | |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 181 | if (device & L_CONSOLE) { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 182 | /* Send console messages to console so people will see them. */ |
| 183 | full_write(2, msg, l); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 184 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 185 | } |
| 186 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 187 | /* From <linux/serial.h> */ |
| 188 | struct serial_struct { |
| 189 | int type; |
| 190 | int line; |
| 191 | unsigned int port; |
| 192 | int irq; |
| 193 | int flags; |
| 194 | int xmit_fifo_size; |
| 195 | int custom_divisor; |
| 196 | int baud_base; |
| 197 | unsigned short close_delay; |
| 198 | char io_type; |
| 199 | char reserved_char[1]; |
| 200 | int hub6; |
| 201 | unsigned short closing_wait; /* time to wait before closing */ |
| 202 | unsigned short closing_wait2; /* no longer used... */ |
| 203 | unsigned char *iomem_base; |
| 204 | unsigned short iomem_reg_shift; |
| 205 | unsigned int port_high; |
| 206 | unsigned long iomap_base; /* cookie passed into ioremap */ |
| 207 | int reserved[1]; |
| 208 | /* Paranoia (imagine 64bit kernel overwriting 32bit userspace stack) */ |
| 209 | uint32_t bbox_reserved[16]; |
| 210 | }; |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 211 | static void console_init(void) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 212 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 213 | struct serial_struct sr; |
| 214 | char *s; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 215 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 216 | s = getenv("CONSOLE"); |
| 217 | if (!s) s = getenv("console"); |
| 218 | if (s) { |
| 219 | int fd = open(s, O_RDWR | O_NONBLOCK | O_NOCTTY); |
| 220 | if (fd >= 0) { |
| 221 | dup2(fd, 0); |
| 222 | dup2(fd, 1); |
| 223 | dup2(fd, 2); |
| 224 | while (fd > 2) close(fd--); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 225 | } |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 226 | messageD(L_LOG, "console='%s'", s); |
Denis Vlasenko | d8540f7 | 2007-06-14 07:53:06 +0000 | [diff] [blame] | 227 | } else { |
| 228 | /* Make sure fd 0,1,2 are not closed */ |
| 229 | bb_sanitize_stdio(); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 230 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 231 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 232 | s = getenv("TERM"); |
| 233 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 234 | /* Force the TERM setting to vt102 for serial console |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 235 | * if TERM is set to linux (the default) */ |
| 236 | if (!s || strcmp(s, "linux") == 0) |
| 237 | putenv((char*)"TERM=vt102"); |
Denis Vlasenko | ccd412d | 2007-03-05 19:55:30 +0000 | [diff] [blame] | 238 | #if !ENABLE_FEATURE_INIT_SYSLOG |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 239 | log_console = NULL; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 240 | #endif |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 241 | } else if (!s) |
| 242 | putenv((char*)"TERM=linux"); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 243 | } |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 244 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 245 | /* Set terminal settings to reasonable defaults */ |
| 246 | static void set_sane_term(void) |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 247 | { |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 248 | struct termios tty; |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 249 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 250 | tcgetattr(STDIN_FILENO, &tty); |
| 251 | |
| 252 | /* set control chars */ |
| 253 | tty.c_cc[VINTR] = 3; /* C-c */ |
| 254 | tty.c_cc[VQUIT] = 28; /* C-\ */ |
| 255 | tty.c_cc[VERASE] = 127; /* C-? */ |
| 256 | tty.c_cc[VKILL] = 21; /* C-u */ |
| 257 | tty.c_cc[VEOF] = 4; /* C-d */ |
| 258 | tty.c_cc[VSTART] = 17; /* C-q */ |
| 259 | tty.c_cc[VSTOP] = 19; /* C-s */ |
| 260 | tty.c_cc[VSUSP] = 26; /* C-z */ |
| 261 | |
| 262 | /* use line dicipline 0 */ |
| 263 | tty.c_line = 0; |
| 264 | |
| 265 | /* Make it be sane */ |
| 266 | tty.c_cflag &= CBAUD | CBAUDEX | CSIZE | CSTOPB | PARENB | PARODD; |
| 267 | tty.c_cflag |= CREAD | HUPCL | CLOCAL; |
| 268 | |
| 269 | /* input modes */ |
| 270 | tty.c_iflag = ICRNL | IXON | IXOFF; |
| 271 | |
| 272 | /* output modes */ |
| 273 | tty.c_oflag = OPOST | ONLCR; |
| 274 | |
| 275 | /* local modes */ |
| 276 | tty.c_lflag = |
| 277 | ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN; |
| 278 | |
| 279 | tcsetattr(STDIN_FILENO, TCSANOW, &tty); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 280 | } |
| 281 | |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 282 | /* Open the new terminal device */ |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 283 | static void open_stdio_to_tty(const char* tty_name, int fail) |
| 284 | { |
| 285 | /* empty tty_name means "use init's tty", else... */ |
| 286 | if (tty_name[0]) { |
Denis Vlasenko | d238a47 | 2007-03-05 19:22:04 +0000 | [diff] [blame] | 287 | int fd = device_open(tty_name, O_RDWR); |
| 288 | if (fd < 0) { |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 289 | message(L_LOG | L_CONSOLE, "Can't open %s: %s", |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 290 | tty_name, strerror(errno)); |
| 291 | if (fail) |
| 292 | _exit(1); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 293 | #if !ENABLE_DEBUG_INIT |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 294 | shutdown_signal(SIGUSR1); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 295 | #else |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 296 | _exit(2); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 297 | #endif |
Denis Vlasenko | d238a47 | 2007-03-05 19:22:04 +0000 | [diff] [blame] | 298 | } else { |
| 299 | dup2(fd, 0); |
| 300 | dup2(fd, 1); |
| 301 | dup2(fd, 2); |
| 302 | if (fd > 2) close(fd); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 303 | } |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 304 | } |
Denis Vlasenko | d238a47 | 2007-03-05 19:22:04 +0000 | [diff] [blame] | 305 | set_sane_term(); |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 306 | } |
| 307 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 308 | /* Used only by run_actions */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 309 | static pid_t run(const struct init_action *a) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 310 | { |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 311 | int i; |
Mike Frysinger | 10427ab | 2005-07-06 05:00:48 +0000 | [diff] [blame] | 312 | pid_t pid; |
Denis Vlasenko | 06c0a71 | 2007-01-29 22:51:44 +0000 | [diff] [blame] | 313 | char *s, *tmpCmd, *cmdpath; |
| 314 | char *cmd[INIT_BUFFS_SIZE]; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 315 | char buf[INIT_BUFFS_SIZE + 6]; /* INIT_BUFFS_SIZE+strlen("exec ")+1 */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 316 | sigset_t nmask, omask; |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 317 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 318 | /* Block sigchild while forking (why?) */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 319 | sigemptyset(&nmask); |
| 320 | sigaddset(&nmask, SIGCHLD); |
| 321 | sigprocmask(SIG_BLOCK, &nmask, &omask); |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 322 | pid = fork(); |
| 323 | sigprocmask(SIG_SETMASK, &omask, NULL); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 324 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 325 | if (pid < 0) |
| 326 | message(L_LOG | L_CONSOLE, "Can't fork"); |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 327 | if (pid) |
| 328 | return pid; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 329 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 330 | /* Child */ |
| 331 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 332 | /* Reset signal handlers that were set by the parent process */ |
| 333 | signal(SIGUSR1, SIG_DFL); |
| 334 | signal(SIGUSR2, SIG_DFL); |
| 335 | signal(SIGINT, SIG_DFL); |
| 336 | signal(SIGTERM, SIG_DFL); |
| 337 | signal(SIGHUP, SIG_DFL); |
| 338 | signal(SIGQUIT, SIG_DFL); |
| 339 | signal(SIGCONT, SIG_DFL); |
| 340 | signal(SIGSTOP, SIG_DFL); |
| 341 | signal(SIGTSTP, SIG_DFL); |
Eric Andersen | 2f6c04f | 1999-11-01 23:59:44 +0000 | [diff] [blame] | 342 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 343 | /* Create a new session and make ourself the process |
| 344 | * group leader */ |
| 345 | setsid(); |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 346 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 347 | /* Open the new terminal device */ |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 348 | open_stdio_to_tty(a->terminal, 1 /* - exit if open fails*/); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 349 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 350 | #ifdef BUT_RUN_ACTIONS_ALREADY_DOES_WAITING |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 351 | /* If the init Action requires us to wait, then force the |
| 352 | * supplied terminal to be the controlling tty. */ |
| 353 | if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 354 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 355 | /* Now fork off another process to just hang around */ |
Denis Vlasenko | 6bef3d1 | 2007-11-06 03:05:54 +0000 | [diff] [blame] | 356 | pid = fork(); |
Denis Vlasenko | f6ccc62 | 2007-11-10 01:57:35 +0000 | [diff] [blame] | 357 | if (pid < 0) { |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 358 | message(L_LOG | L_CONSOLE, "Can't fork"); |
| 359 | _exit(1); |
| 360 | } |
| 361 | |
| 362 | if (pid > 0) { |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 363 | /* Parent - wait till the child is done */ |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 364 | signal(SIGINT, SIG_IGN); |
| 365 | signal(SIGTSTP, SIG_IGN); |
| 366 | signal(SIGQUIT, SIG_IGN); |
| 367 | signal(SIGCHLD, SIG_DFL); |
| 368 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 369 | waitfor(pid); |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 370 | /* See if stealing the controlling tty back is necessary */ |
| 371 | if (tcgetpgrp(0) != getpid()) |
| 372 | _exit(0); |
| 373 | |
| 374 | /* Use a temporary process to steal the controlling tty. */ |
Denis Vlasenko | 6bef3d1 | 2007-11-06 03:05:54 +0000 | [diff] [blame] | 375 | pid = fork(); |
| 376 | if (pid < 0) { |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 377 | message(L_LOG | L_CONSOLE, "Can't fork"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 378 | _exit(1); |
| 379 | } |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 380 | if (pid == 0) { |
| 381 | setsid(); |
| 382 | ioctl(0, TIOCSCTTY, 1); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 383 | _exit(0); |
| 384 | } |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 385 | waitfor(pid); |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 386 | _exit(0); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 387 | } |
| 388 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 389 | /* Child - fall though to actually execute things */ |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 390 | } |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 391 | #endif |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 392 | |
| 393 | /* See if any special /bin/sh requiring characters are present */ |
| 394 | if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { |
| 395 | cmd[0] = (char*)DEFAULT_SHELL; |
| 396 | cmd[1] = (char*)"-c"; |
| 397 | cmd[2] = strcat(strcpy(buf, "exec "), a->command); |
| 398 | cmd[3] = NULL; |
| 399 | } else { |
| 400 | /* Convert command (char*) into cmd (char**, one word per string) */ |
| 401 | strcpy(buf, a->command); |
| 402 | s = buf; |
| 403 | for (tmpCmd = buf, i = 0; (tmpCmd = strsep(&s, " \t")) != NULL;) { |
| 404 | if (*tmpCmd != '\0') { |
| 405 | cmd[i] = tmpCmd; |
| 406 | i++; |
| 407 | } |
| 408 | } |
| 409 | cmd[i] = NULL; |
| 410 | } |
| 411 | |
| 412 | cmdpath = cmd[0]; |
| 413 | |
| 414 | /* |
| 415 | * Interactive shells want to see a dash in argv[0]. This |
| 416 | * typically is handled by login, argv will be setup this |
| 417 | * way if a dash appears at the front of the command path |
| 418 | * (like "-/bin/sh"). |
| 419 | */ |
| 420 | if (*cmdpath == '-') { |
| 421 | /* skip over the dash */ |
| 422 | ++cmdpath; |
| 423 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 424 | #ifdef WHY_WE_DO_THIS_SHELL_MUST_HANDLE_THIS_ITSELF |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 425 | /* find the last component in the command pathname */ |
Denis Vlasenko | 818322b | 2007-09-24 18:27:04 +0000 | [diff] [blame] | 426 | s = bb_get_last_path_component_nostrip(cmdpath); |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 427 | /* make a new argv[0] */ |
Denis Vlasenko | 818322b | 2007-09-24 18:27:04 +0000 | [diff] [blame] | 428 | cmd[0] = malloc(strlen(s) + 2); |
| 429 | if (cmd[0] == NULL) { |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 430 | message(L_LOG | L_CONSOLE, bb_msg_memory_exhausted); |
| 431 | cmd[0] = cmdpath; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 432 | } else { |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 433 | cmd[0][0] = '-'; |
| 434 | strcpy(cmd[0] + 1, s); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 435 | } |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 436 | #endif |
| 437 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 438 | #if ENABLE_FEATURE_INIT_SCTTY |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 439 | /* Establish this process as session leader and |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 440 | * _attempt_ to make stdin a controlling tty. |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 441 | */ |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 442 | ioctl(0, TIOCSCTTY, 0 /*only try, don't steal*/); |
Paul Fox | 41a72ec | 2005-08-01 16:43:13 +0000 | [diff] [blame] | 443 | #endif |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 444 | } |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 445 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 446 | if (a->action & ASKFIRST) { |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 447 | static const char press_enter[] ALIGN1 = |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 448 | #ifdef CUSTOMIZED_BANNER |
| 449 | #include CUSTOMIZED_BANNER |
Eric Andersen | 1f50e84 | 2004-08-16 09:29:42 +0000 | [diff] [blame] | 450 | #endif |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 451 | "\nPlease press Enter to activate this console. "; |
| 452 | char c; |
| 453 | /* |
| 454 | * Save memory by not exec-ing anything large (like a shell) |
| 455 | * before the user wants it. This is critical if swap is not |
| 456 | * enabled and the system has low memory. Generally this will |
| 457 | * be run on the second virtual console, and the first will |
| 458 | * be allowed to start a shell or whatever an init script |
| 459 | * specifies. |
| 460 | */ |
| 461 | messageD(L_LOG, "waiting for enter to start '%s'" |
| 462 | "(pid %d, tty '%s')\n", |
| 463 | cmdpath, getpid(), a->terminal); |
| 464 | full_write(1, press_enter, sizeof(press_enter) - 1); |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 465 | while (safe_read(0, &c, 1) == 1 && c != '\n') |
| 466 | continue; |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 467 | } |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 468 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 469 | /* Log the process name and args */ |
| 470 | message(L_LOG, "starting pid %d, tty '%s': '%s'", |
| 471 | getpid(), a->terminal, cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 472 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 473 | #if ENABLE_FEATURE_INIT_COREDUMPS |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 474 | { |
| 475 | struct stat sb; |
| 476 | if (stat(CORE_ENABLE_FLAG_FILE, &sb) == 0) { |
| 477 | struct rlimit limit; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 478 | |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 479 | limit.rlim_cur = RLIM_INFINITY; |
| 480 | limit.rlim_max = RLIM_INFINITY; |
| 481 | setrlimit(RLIMIT_CORE, &limit); |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 482 | } |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 483 | } |
Denis Vlasenko | 966bb43 | 2007-02-27 19:20:33 +0000 | [diff] [blame] | 484 | #endif |
| 485 | /* Now run it. The new program will take over this PID, |
| 486 | * so nothing further in init.c should be run. */ |
| 487 | BB_EXECVP(cmdpath, cmd); |
| 488 | |
| 489 | /* We're still here? Some error happened. */ |
| 490 | message(L_LOG | L_CONSOLE, "Cannot run '%s': %s", |
| 491 | cmdpath, strerror(errno)); |
| 492 | _exit(-1); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 493 | } |
| 494 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 495 | static int waitfor(pid_t runpid) |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 496 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 497 | int status, wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 498 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 499 | while (1) { |
Bernhard Reutner-Fischer | d818dcc | 2007-02-16 17:17:07 +0000 | [diff] [blame] | 500 | wpid = waitpid(runpid, &status, 0); |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 501 | if (wpid == -1 && errno == EINTR) |
| 502 | continue; |
| 503 | break; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 504 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 505 | return wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 506 | } |
| 507 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 508 | /* Run all commands of a particular type */ |
| 509 | static void run_actions(int action) |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 510 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 511 | struct init_action *a, *tmp; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 512 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 513 | for (a = init_action_list; a; a = tmp) { |
| 514 | tmp = a->next; |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 515 | if (a->action == action) { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 516 | /* a->terminal of "" means "init's console" */ |
| 517 | if (a->terminal[0] && access(a->terminal, R_OK | W_OK)) { |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 518 | //message(L_LOG | L_CONSOLE, "Device %s cannot be opened in RW mode", a->terminal /*, strerror(errno)*/); |
Rob Landley | 2dd4279 | 2006-03-22 17:39:13 +0000 | [diff] [blame] | 519 | delete_init_action(a); |
| 520 | } else if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) { |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 521 | waitfor(run(a)); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 522 | delete_init_action(a); |
| 523 | } else if (a->action & ONCE) { |
| 524 | run(a); |
| 525 | delete_init_action(a); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 526 | } else if (a->action & (RESPAWN | ASKFIRST)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 527 | /* Only run stuff with pid==0. If they have |
| 528 | * a pid, that means it is still running */ |
| 529 | if (a->pid == 0) { |
| 530 | a->pid = run(a); |
| 531 | } |
| 532 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 533 | } |
| 534 | } |
| 535 | } |
| 536 | |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 537 | #if !ENABLE_DEBUG_INIT |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 538 | static void init_reboot(unsigned long magic) |
| 539 | { |
| 540 | pid_t pid; |
| 541 | /* We have to fork here, since the kernel calls do_exit(0) in |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 542 | * linux/kernel/sys.c, which can cause the machine to panic when |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 543 | * the init process is killed.... */ |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 544 | pid = vfork(); |
| 545 | if (pid == 0) { /* child */ |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 546 | reboot(magic); |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 547 | _exit(0); |
| 548 | } |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 549 | waitpid(pid, NULL, 0); |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 550 | } |
| 551 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 552 | static void shutdown_system(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 553 | { |
Eric Andersen | 813d88c | 2001-10-28 22:49:48 +0000 | [diff] [blame] | 554 | sigset_t block_signals; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 555 | |
Eric Andersen | a9cc896 | 2002-09-16 06:49:06 +0000 | [diff] [blame] | 556 | /* run everything to be run at "shutdown". This is done _prior_ |
| 557 | * to killing everything, in case people wish to use scripts to |
| 558 | * shut things down gracefully... */ |
| 559 | run_actions(SHUTDOWN); |
| 560 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 561 | /* first disable all our signals */ |
| 562 | sigemptyset(&block_signals); |
| 563 | sigaddset(&block_signals, SIGHUP); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 564 | sigaddset(&block_signals, SIGQUIT); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 565 | sigaddset(&block_signals, SIGCHLD); |
| 566 | sigaddset(&block_signals, SIGUSR1); |
| 567 | sigaddset(&block_signals, SIGUSR2); |
| 568 | sigaddset(&block_signals, SIGINT); |
| 569 | sigaddset(&block_signals, SIGTERM); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 570 | sigaddset(&block_signals, SIGCONT); |
| 571 | sigaddset(&block_signals, SIGSTOP); |
| 572 | sigaddset(&block_signals, SIGTSTP); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 573 | sigprocmask(SIG_BLOCK, &block_signals, NULL); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 574 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 575 | message(L_CONSOLE | L_LOG, "The system is going down NOW!"); |
| 576 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 577 | /* Allow Ctrl-Alt-Del to reboot system. */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 578 | init_reboot(RB_ENABLE_CAD); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 579 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 580 | /* Send signals to every process _except_ pid 1 */ |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 581 | message(L_CONSOLE | L_LOG, "Sending SIG%s to all processes", "TERM"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 582 | kill(-1, SIGTERM); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 583 | sync(); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 584 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 585 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 586 | message(L_CONSOLE | L_LOG, "Sending SIG%s to all processes", "KILL"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 587 | kill(-1, SIGKILL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 588 | sync(); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 589 | sleep(1); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 590 | } |
| 591 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 592 | static void shutdown_signal(int sig) |
| 593 | { |
| 594 | const char *m; |
| 595 | int rb; |
| 596 | |
| 597 | shutdown_system(); |
| 598 | |
| 599 | m = "halt"; |
| 600 | rb = RB_HALT_SYSTEM; |
| 601 | if (sig == SIGTERM) { |
| 602 | m = "reboot"; |
| 603 | rb = RB_AUTOBOOT; |
| 604 | } else if (sig == SIGUSR2) { |
| 605 | m = "poweroff"; |
| 606 | rb = RB_POWER_OFF; |
| 607 | } |
| 608 | message(L_CONSOLE | L_LOG, "Requesting system %s", m); |
| 609 | /* allow time for last message to reach serial console */ |
| 610 | sleep(2); |
| 611 | init_reboot(rb); |
| 612 | loop_forever(); |
| 613 | } |
| 614 | |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 615 | static void exec_signal(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 616 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 617 | struct init_action *a, *tmp; |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 618 | sigset_t unblock_signals; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 619 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 620 | for (a = init_action_list; a; a = tmp) { |
| 621 | tmp = a->next; |
| 622 | if (a->action & RESTART) { |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 623 | shutdown_system(); |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 624 | |
| 625 | /* unblock all signals, blocked in shutdown_system() */ |
| 626 | sigemptyset(&unblock_signals); |
| 627 | sigaddset(&unblock_signals, SIGHUP); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 628 | sigaddset(&unblock_signals, SIGQUIT); |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 629 | sigaddset(&unblock_signals, SIGCHLD); |
| 630 | sigaddset(&unblock_signals, SIGUSR1); |
| 631 | sigaddset(&unblock_signals, SIGUSR2); |
| 632 | sigaddset(&unblock_signals, SIGINT); |
| 633 | sigaddset(&unblock_signals, SIGTERM); |
| 634 | sigaddset(&unblock_signals, SIGCONT); |
| 635 | sigaddset(&unblock_signals, SIGSTOP); |
| 636 | sigaddset(&unblock_signals, SIGTSTP); |
| 637 | sigprocmask(SIG_UNBLOCK, &unblock_signals, NULL); |
| 638 | |
Eric Andersen | 3c8064f | 2003-07-05 08:29:01 +0000 | [diff] [blame] | 639 | /* Open the new terminal device */ |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 640 | open_stdio_to_tty(a->terminal, 0 /* - shutdown_signal(SIGUSR1) [halt] if open fails */); |
Eric Andersen | 3c8064f | 2003-07-05 08:29:01 +0000 | [diff] [blame] | 641 | |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 642 | messageD(L_CONSOLE | L_LOG, "Trying to re-exec %s", a->command); |
Denis Vlasenko | 4921b54 | 2007-02-03 02:17:41 +0000 | [diff] [blame] | 643 | BB_EXECLP(a->command, a->command, NULL); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 644 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 645 | message(L_CONSOLE | L_LOG, "Cannot run '%s': %s", |
| 646 | a->command, strerror(errno)); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 647 | sleep(2); |
| 648 | init_reboot(RB_HALT_SYSTEM); |
| 649 | loop_forever(); |
| 650 | } |
| 651 | } |
| 652 | } |
| 653 | |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 654 | static void ctrlaltdel_signal(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 655 | { |
| 656 | run_actions(CTRLALTDEL); |
| 657 | } |
| 658 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 659 | /* The SIGSTOP & SIGTSTP handler */ |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 660 | static void stop_handler(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 661 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 662 | int saved_errno = errno; |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 663 | |
| 664 | got_cont = 0; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 665 | while (!got_cont) |
| 666 | pause(); |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 667 | |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 668 | errno = saved_errno; |
| 669 | } |
| 670 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 671 | /* The SIGCONT handler */ |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 672 | static void cont_handler(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 673 | { |
| 674 | got_cont = 1; |
| 675 | } |
| 676 | |
Denis Vlasenko | e968fcd | 2007-02-03 02:42:47 +0000 | [diff] [blame] | 677 | #endif /* !ENABLE_DEBUG_INIT */ |
Erik Andersen | de55287 | 2000-01-23 01:34:05 +0000 | [diff] [blame] | 678 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 679 | static void new_init_action(uint8_t action, const char *command, const char *cons) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 680 | { |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 681 | struct init_action *new_action, *a, *last; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 682 | |
"Vladimir N. Oleynik" | 6c35c7c | 2005-10-12 15:34:25 +0000 | [diff] [blame] | 683 | if (strcmp(cons, bb_dev_null) == 0 && (action & ASKFIRST)) |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 684 | return; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 685 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 686 | /* Append to the end of the list */ |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 687 | for (a = last = init_action_list; a; a = a->next) { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 688 | /* don't enter action if it's already in the list, |
| 689 | * but do overwrite existing actions */ |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 690 | if ((strcmp(a->command, command) == 0) |
| 691 | && (strcmp(a->terminal, cons) == 0) |
| 692 | ) { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 693 | a->action = action; |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 694 | return; |
| 695 | } |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 696 | last = a; |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 697 | } |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 698 | |
| 699 | new_action = xzalloc(sizeof(struct init_action)); |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 700 | if (last) { |
| 701 | last->next = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 702 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 703 | init_action_list = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 704 | } |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 705 | strcpy(new_action->command, command); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 706 | new_action->action = action; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 707 | strcpy(new_action->terminal, cons); |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 708 | messageD(L_LOG | L_CONSOLE, "command='%s' action=%d tty='%s'\n", |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 709 | new_action->command, new_action->action, new_action->terminal); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 710 | } |
| 711 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 712 | static void delete_init_action(struct init_action *action) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 713 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 714 | struct init_action *a, *b = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 715 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 716 | for (a = init_action_list; a; b = a, a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 717 | if (a == action) { |
| 718 | if (b == NULL) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 719 | init_action_list = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 720 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 721 | b->next = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 722 | } |
| 723 | free(a); |
| 724 | break; |
| 725 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 726 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 727 | } |
| 728 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 729 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 730 | * then parse_inittab() simply adds in some default |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 731 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
| 732 | * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB |
| 733 | * _is_ defined, but /etc/inittab is missing, this |
Erik Andersen | 812d466 | 2000-01-07 18:30:40 +0000 | [diff] [blame] | 734 | * results in the same set of default behaviors. |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 735 | */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 736 | static void parse_inittab(void) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 737 | { |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 738 | #if ENABLE_FEATURE_USE_INITTAB |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 739 | static const char actions[] = |
| 740 | STR_SYSINIT "sysinit\0" |
| 741 | STR_RESPAWN "respawn\0" |
| 742 | STR_ASKFIRST "askfirst\0" |
| 743 | STR_WAIT "wait\0" |
| 744 | STR_ONCE "once\0" |
| 745 | STR_CTRLALTDEL "ctrlaltdel\0" |
| 746 | STR_SHUTDOWN "shutdown\0" |
| 747 | STR_RESTART "restart\0" |
| 748 | ; |
| 749 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 750 | FILE *file; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 751 | char buf[INIT_BUFFS_SIZE], lineAsRead[INIT_BUFFS_SIZE]; |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 752 | char tmpConsole[CONSOLE_NAME_SIZE]; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 753 | char *id, *runlev, *action, *command, *eol; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 754 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 755 | file = fopen(INITTAB, "r"); |
| 756 | if (file == NULL) { |
| 757 | /* No inittab file -- set up some default behavior */ |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 758 | #endif |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 759 | /* Reboot on Ctrl-Alt-Del */ |
Denis Vlasenko | 2f0c0d0 | 2007-01-21 00:41:04 +0000 | [diff] [blame] | 760 | new_init_action(CTRLALTDEL, "reboot", ""); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 761 | /* Umount all filesystems on halt/reboot */ |
Denis Vlasenko | 2f0c0d0 | 2007-01-21 00:41:04 +0000 | [diff] [blame] | 762 | new_init_action(SHUTDOWN, "umount -a -r", ""); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 763 | /* Swapoff on halt/reboot */ |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 764 | if (ENABLE_SWAPONOFF) |
| 765 | new_init_action(SHUTDOWN, "swapoff -a", ""); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 766 | /* Prepare to restart init when a HUP is received */ |
Denis Vlasenko | 2f0c0d0 | 2007-01-21 00:41:04 +0000 | [diff] [blame] | 767 | new_init_action(RESTART, "init", ""); |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame] | 768 | /* Askfirst shell on tty1-4 */ |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 769 | new_init_action(ASKFIRST, bb_default_login_shell, ""); |
| 770 | new_init_action(ASKFIRST, bb_default_login_shell, VC_2); |
| 771 | new_init_action(ASKFIRST, bb_default_login_shell, VC_3); |
| 772 | new_init_action(ASKFIRST, bb_default_login_shell, VC_4); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 773 | /* sysinit */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 774 | new_init_action(SYSINIT, INIT_SCRIPT, ""); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 775 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 776 | return; |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 777 | #if ENABLE_FEATURE_USE_INITTAB |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 778 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 779 | |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 780 | while (fgets(buf, INIT_BUFFS_SIZE, file) != NULL) { |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 781 | const char *a; |
| 782 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 783 | /* Skip leading spaces */ |
| 784 | for (id = buf; *id == ' ' || *id == '\t'; id++); |
| 785 | |
| 786 | /* Skip the line if it's a comment */ |
| 787 | if (*id == '#' || *id == '\n') |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 788 | continue; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 789 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 790 | /* Trim the trailing \n */ |
Bernhard Reutner-Fischer | d818dcc | 2007-02-16 17:17:07 +0000 | [diff] [blame] | 791 | //XXX: chomp() ? |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 792 | eol = strrchr(id, '\n'); |
| 793 | if (eol != NULL) |
| 794 | *eol = '\0'; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 795 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 796 | /* Keep a copy around for posterity's sake (and error msgs) */ |
| 797 | strcpy(lineAsRead, buf); |
| 798 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 799 | /* Separate the ID field from the runlevels */ |
| 800 | runlev = strchr(id, ':'); |
| 801 | if (runlev == NULL || *(runlev + 1) == '\0') { |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 802 | message(L_LOG | L_CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 803 | continue; |
| 804 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 805 | *runlev = '\0'; |
| 806 | ++runlev; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 807 | } |
| 808 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 809 | /* Separate the runlevels from the action */ |
| 810 | action = strchr(runlev, ':'); |
| 811 | if (action == NULL || *(action + 1) == '\0') { |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 812 | message(L_LOG | L_CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 813 | continue; |
| 814 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 815 | *action = '\0'; |
| 816 | ++action; |
| 817 | } |
| 818 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 819 | /* Separate the action from the command */ |
| 820 | command = strchr(action, ':'); |
| 821 | if (command == NULL || *(command + 1) == '\0') { |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 822 | message(L_LOG | L_CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 823 | continue; |
| 824 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 825 | *command = '\0'; |
| 826 | ++command; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 827 | } |
| 828 | |
| 829 | /* Ok, now process it */ |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 830 | for (a = actions; a[0]; a += strlen(a) + 1) { |
| 831 | if (strcmp(a + 1, action) == 0) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 832 | if (*id != '\0') { |
Denis Vlasenko | 51742f4 | 2007-04-12 00:32:05 +0000 | [diff] [blame] | 833 | if (strncmp(id, "/dev/", 5) == 0) |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 834 | id += 5; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 835 | strcpy(tmpConsole, "/dev/"); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 836 | safe_strncpy(tmpConsole + 5, id, |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 837 | sizeof(tmpConsole) - 5); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 838 | id = tmpConsole; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 839 | } |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 840 | new_init_action((uint8_t)a[0], command, id); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 841 | break; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 842 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 843 | } |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 844 | if (!a[0]) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 845 | /* Choke on an unknown action */ |
Denis Vlasenko | ec27feb | 2007-02-17 15:52:02 +0000 | [diff] [blame] | 846 | message(L_LOG | L_CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 847 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 848 | } |
Eric Andersen | d8636ca | 2002-05-15 22:19:09 +0000 | [diff] [blame] | 849 | fclose(file); |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 850 | #endif /* FEATURE_USE_INITTAB */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 851 | } |
| 852 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 853 | #if ENABLE_FEATURE_USE_INITTAB |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 854 | static void reload_signal(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 855 | { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 856 | struct init_action *a, *tmp; |
| 857 | |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 858 | message(L_LOG, "reloading /etc/inittab"); |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 859 | |
| 860 | /* disable old entrys */ |
| 861 | for (a = init_action_list; a; a = a->next ) { |
| 862 | a->action = ONCE; |
| 863 | } |
| 864 | |
| 865 | parse_inittab(); |
| 866 | |
| 867 | /* remove unused entrys */ |
| 868 | for (a = init_action_list; a; a = tmp) { |
| 869 | tmp = a->next; |
Denis Vlasenko | 219d14d | 2007-03-24 15:40:16 +0000 | [diff] [blame] | 870 | if ((a->action & (ONCE | SYSINIT | WAIT)) && a->pid == 0) { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 871 | delete_init_action(a); |
| 872 | } |
| 873 | } |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 874 | run_actions(RESPAWN); |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 875 | } |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 876 | #endif /* FEATURE_USE_INITTAB */ |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 877 | |
Denis Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 878 | int init_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Rob Landley | dfba741 | 2006-03-06 20:47:33 +0000 | [diff] [blame] | 879 | int init_main(int argc, char **argv) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 880 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 881 | struct init_action *a; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 882 | pid_t wpid; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 883 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 884 | die_sleep = 30 * 24*60*60; /* if xmalloc will ever die... */ |
| 885 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 886 | if (argc > 1 && !strcmp(argv[1], "-q")) { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 887 | return kill(1, SIGHUP); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 888 | } |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 889 | #if !ENABLE_DEBUG_INIT |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 890 | /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */ |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 891 | if (getpid() != 1 |
| 892 | && (!ENABLE_FEATURE_INITRD || !strstr(applet_name, "linuxrc")) |
| 893 | ) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 894 | bb_show_usage(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 895 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 896 | /* Set up sig handlers -- be sure to |
| 897 | * clear all of these in run() */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 898 | signal(SIGHUP, exec_signal); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 899 | signal(SIGQUIT, exec_signal); |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 900 | signal(SIGUSR1, shutdown_signal); |
| 901 | signal(SIGUSR2, shutdown_signal); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 902 | signal(SIGINT, ctrlaltdel_signal); |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 903 | signal(SIGTERM, shutdown_signal); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 904 | signal(SIGCONT, cont_handler); |
| 905 | signal(SIGSTOP, stop_handler); |
| 906 | signal(SIGTSTP, stop_handler); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 907 | |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 908 | /* Turn off rebooting via CTL-ALT-DEL -- we get a |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 909 | * SIGINT on CAD so we can shut things down gracefully... */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 910 | init_reboot(RB_DISABLE_CAD); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 911 | #endif |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 912 | |
Denis Vlasenko | d8540f7 | 2007-06-14 07:53:06 +0000 | [diff] [blame] | 913 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 914 | /* Figure out where the default console should be */ |
| 915 | console_init(); |
Denis Vlasenko | d238a47 | 2007-03-05 19:22:04 +0000 | [diff] [blame] | 916 | set_sane_term(); |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 917 | chdir("/"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 918 | setsid(); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 919 | { |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 920 | const char *const *e; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 921 | /* Make sure environs is set to something sane */ |
Denis Vlasenko | bf0a201 | 2006-12-26 10:42:51 +0000 | [diff] [blame] | 922 | for (e = environment; *e; e++) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 923 | putenv((char *) *e); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 924 | } |
Rob Landley | cba1b96 | 2006-07-09 17:28:17 +0000 | [diff] [blame] | 925 | |
| 926 | if (argc > 1) setenv("RUNLEVEL", argv[1], 1); |
| 927 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 928 | /* Hello world */ |
Denis Vlasenko | ca525b4 | 2007-06-13 12:27:17 +0000 | [diff] [blame] | 929 | message(MAYBE_CONSOLE | L_LOG, "init started: %s", bb_banner); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 930 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 931 | /* Make sure there is enough memory to do something useful. */ |
Rob Landley | c3386a4 | 2005-08-30 18:50:37 +0000 | [diff] [blame] | 932 | if (ENABLE_SWAPONOFF) { |
| 933 | struct sysinfo info; |
| 934 | |
| 935 | if (!sysinfo(&info) && |
Denis Vlasenko | dca0b70 | 2006-10-27 09:05:02 +0000 | [diff] [blame] | 936 | (info.mem_unit ? : 1) * (long long)info.totalram < 1024*1024) |
Rob Landley | c3386a4 | 2005-08-30 18:50:37 +0000 | [diff] [blame] | 937 | { |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 938 | message(L_CONSOLE, "Low memory, forcing swapon"); |
Rob Landley | c3386a4 | 2005-08-30 18:50:37 +0000 | [diff] [blame] | 939 | /* swapon -a requires /proc typically */ |
Denis Vlasenko | 2f0c0d0 | 2007-01-21 00:41:04 +0000 | [diff] [blame] | 940 | new_init_action(SYSINIT, "mount -t proc proc /proc", ""); |
Rob Landley | c3386a4 | 2005-08-30 18:50:37 +0000 | [diff] [blame] | 941 | /* Try to turn on swap */ |
Denis Vlasenko | 2f0c0d0 | 2007-01-21 00:41:04 +0000 | [diff] [blame] | 942 | new_init_action(SYSINIT, "swapon -a", ""); |
Rob Landley | c3386a4 | 2005-08-30 18:50:37 +0000 | [diff] [blame] | 943 | run_actions(SYSINIT); /* wait and removing */ |
| 944 | } |
| 945 | } |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 946 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 947 | /* Check if we are supposed to be in single user mode */ |
Denis Vlasenko | bf66fbc | 2006-12-21 13:23:14 +0000 | [diff] [blame] | 948 | if (argc > 1 |
| 949 | && (!strcmp(argv[1], "single") || !strcmp(argv[1], "-s") || LONE_CHAR(argv[1], '1')) |
| 950 | ) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 951 | /* Start a shell on console */ |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 952 | new_init_action(RESPAWN, bb_default_login_shell, ""); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 953 | } else { |
| 954 | /* Not in single user mode -- see what inittab says */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 955 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 956 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 957 | * then parse_inittab() simply adds in some default |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 958 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 959 | * of "askfirst" shells */ |
| 960 | parse_inittab(); |
Eric Andersen | d00c262 | 1999-12-07 08:37:31 +0000 | [diff] [blame] | 961 | } |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 962 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 963 | #if ENABLE_SELINUX |
Rob Landley | b3ede5a | 2006-03-27 23:09:12 +0000 | [diff] [blame] | 964 | if (getenv("SELINUX_INIT") == NULL) { |
| 965 | int enforce = 0; |
| 966 | |
Denis Vlasenko | d8540f7 | 2007-06-14 07:53:06 +0000 | [diff] [blame] | 967 | putenv((char*)"SELINUX_INIT=YES"); |
Rob Landley | b3ede5a | 2006-03-27 23:09:12 +0000 | [diff] [blame] | 968 | if (selinux_init_load_policy(&enforce) == 0) { |
Denis Vlasenko | 4921b54 | 2007-02-03 02:17:41 +0000 | [diff] [blame] | 969 | BB_EXECVP(argv[0], argv); |
Rob Landley | b3ede5a | 2006-03-27 23:09:12 +0000 | [diff] [blame] | 970 | } else if (enforce > 0) { |
| 971 | /* SELinux in enforcing mode but load_policy failed */ |
Denis Vlasenko | b716754 | 2007-02-27 19:20:00 +0000 | [diff] [blame] | 972 | message(L_CONSOLE, "Cannot load SELinux Policy. " |
| 973 | "Machine is in enforcing mode. Halting now."); |
Rob Landley | b3ede5a | 2006-03-27 23:09:12 +0000 | [diff] [blame] | 974 | exit(1); |
| 975 | } |
| 976 | } |
| 977 | #endif /* CONFIG_SELINUX */ |
| 978 | |
Denis Vlasenko | 2afabe8 | 2007-12-10 07:06:04 +0000 | [diff] [blame^] | 979 | /* Make the command line just say "init" - thats all, nothing else */ |
| 980 | strncpy(argv[0], "init", strlen(argv[0])); |
| 981 | /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */ |
| 982 | while (*++argv) |
| 983 | memset(*argv, 0, strlen(*argv)); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 984 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 985 | /* Now run everything that needs to be run */ |
| 986 | |
| 987 | /* First run the sysinit command */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 988 | run_actions(SYSINIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 989 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 990 | /* Next run anything that wants to block */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 991 | run_actions(WAIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 992 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 993 | /* Next run anything to be run only once */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 994 | run_actions(ONCE); |
| 995 | |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 996 | #if ENABLE_FEATURE_USE_INITTAB |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 997 | /* Redefine SIGHUP to reread /etc/inittab */ |
| 998 | signal(SIGHUP, reload_signal); |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 999 | #else |
| 1000 | signal(SIGHUP, SIG_IGN); |
Denis Vlasenko | 9b1381f | 2007-01-03 02:56:00 +0000 | [diff] [blame] | 1001 | #endif /* FEATURE_USE_INITTAB */ |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 1002 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1003 | /* Now run the looping stuff for the rest of forever */ |
| 1004 | while (1) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1005 | /* run the respawn stuff */ |
| 1006 | run_actions(RESPAWN); |
| 1007 | |
| 1008 | /* run the askfirst stuff */ |
| 1009 | run_actions(ASKFIRST); |
| 1010 | |
| 1011 | /* Don't consume all CPU time -- sleep a bit */ |
| 1012 | sleep(1); |
| 1013 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1014 | /* Wait for a child process to exit */ |
Bernhard Reutner-Fischer | c58dbf2 | 2006-05-30 12:16:54 +0000 | [diff] [blame] | 1015 | wpid = wait(NULL); |
Eric Andersen | 87812dc | 2004-04-12 19:21:54 +0000 | [diff] [blame] | 1016 | while (wpid > 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1017 | /* Find out who died and clean up their corpse */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1018 | for (a = init_action_list; a; a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1019 | if (a->pid == wpid) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1020 | /* Set the pid to 0 so that the process gets |
| 1021 | * restarted by run_actions() */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1022 | a->pid = 0; |
Denis Vlasenko | 7a2ca5e | 2007-02-21 00:15:20 +0000 | [diff] [blame] | 1023 | message(L_LOG, "process '%s' (pid %d) exited. " |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1024 | "Scheduling it for restart.", |
| 1025 | a->command, wpid); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1026 | } |
| 1027 | } |
Eric Andersen | cf1fee0 | 2002-12-17 09:48:16 +0000 | [diff] [blame] | 1028 | /* see if anyone else is waiting to be reaped */ |
Denis Vlasenko | ce97960 | 2006-09-27 23:31:08 +0000 | [diff] [blame] | 1029 | wpid = waitpid(-1, NULL, WNOHANG); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1030 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1031 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1032 | } |