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 | cb81e64 | 2003-07-14 21:21:08 +0000 | [diff] [blame] | 6 | * Copyright (C) 1999-2003 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 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | * |
| 23 | */ |
| 24 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 25 | /* Turn this on to disable all the dangerous |
| 26 | rebooting stuff when debugging. |
| 27 | #define DEBUG_INIT |
| 28 | */ |
| 29 | |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 30 | #include <stdio.h> |
| 31 | #include <stdlib.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 32 | #include <errno.h> |
Eric Andersen | b186d98 | 1999-12-03 09:19:54 +0000 | [diff] [blame] | 33 | #include <paths.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 34 | #include <signal.h> |
| 35 | #include <stdarg.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 36 | #include <string.h> |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 37 | #include <termios.h> |
| 38 | #include <unistd.h> |
Eric Andersen | ed3ef50 | 2001-01-27 08:24:39 +0000 | [diff] [blame] | 39 | #include <limits.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 40 | #include <sys/fcntl.h> |
| 41 | #include <sys/ioctl.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 42 | #include <sys/mount.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 43 | #include <sys/types.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 44 | #include <sys/wait.h> |
Eric Andersen | 85e5e72 | 2003-07-22 08:56:55 +0000 | [diff] [blame] | 45 | #include <sys/reboot.h> |
Eric Andersen | cbe31da | 2001-02-20 06:14:08 +0000 | [diff] [blame] | 46 | #include "busybox.h" |
Eric Andersen | b01ed65 | 2003-06-27 17:08:15 +0000 | [diff] [blame] | 47 | |
| 48 | #include "init_shared.h" |
| 49 | |
| 50 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 51 | #ifdef CONFIG_SYSLOGD |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 52 | # include <sys/syslog.h> |
| 53 | #endif |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 54 | |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 55 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 56 | #if defined(__UCLIBC__) && !defined(__UCLIBC_HAS_MMU__) |
| 57 | #define fork vfork |
| 58 | #endif |
Pavel Roskin | 9c5fcc3 | 2000-07-17 23:45:12 +0000 | [diff] [blame] | 59 | |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 60 | #define INIT_BUFFS_SIZE 256 |
| 61 | |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 62 | /* From <linux/vt.h> */ |
| 63 | struct vt_stat { |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 64 | unsigned short v_active; /* active vt */ |
| 65 | unsigned short v_signal; /* signal to send */ |
| 66 | unsigned short v_state; /* vt bitmask */ |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 67 | }; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 68 | static const int VT_GETSTATE = 0x5603; /* get global vt state info */ |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 69 | |
| 70 | /* From <linux/serial.h> */ |
| 71 | struct serial_struct { |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 72 | int type; |
| 73 | int line; |
| 74 | int port; |
| 75 | int irq; |
| 76 | int flags; |
| 77 | int xmit_fifo_size; |
| 78 | int custom_divisor; |
| 79 | int baud_base; |
| 80 | unsigned short close_delay; |
| 81 | char reserved_char[2]; |
| 82 | int hub6; |
| 83 | unsigned short closing_wait; /* time to wait before closing */ |
| 84 | unsigned short closing_wait2; /* no longer used... */ |
| 85 | int reserved[4]; |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 86 | }; |
| 87 | |
| 88 | |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 89 | #ifndef _PATH_STDPATH |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 90 | #define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin" |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 91 | #endif |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 92 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 93 | #if defined CONFIG_FEATURE_INIT_COREDUMPS |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 94 | /* |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 95 | * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called |
| 96 | * before processes are spawned to set core file size as unlimited. |
| 97 | * This is for debugging only. Don't use this is production, unless |
| 98 | * you want core dumps lying about.... |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 99 | */ |
| 100 | #define CORE_ENABLE_FLAG_FILE "/.init_enable_core" |
| 101 | #include <sys/resource.h> |
| 102 | #include <sys/time.h> |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 103 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 104 | |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 105 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 106 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 107 | #define INITTAB "/etc/inittab" /* inittab file location */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 108 | #ifndef INIT_SCRIPT |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 109 | #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 110 | #endif |
Erik Andersen | 9c88cac | 1999-12-30 09:25:17 +0000 | [diff] [blame] | 111 | |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 112 | #define MAXENV 16 /* Number of env. vars */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 113 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 114 | #define CONSOLE_BUFF_SIZE 32 |
| 115 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 116 | /* Allowed init action types */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 117 | #define SYSINIT 0x001 |
| 118 | #define RESPAWN 0x002 |
| 119 | #define ASKFIRST 0x004 |
| 120 | #define WAIT 0x008 |
| 121 | #define ONCE 0x010 |
| 122 | #define CTRLALTDEL 0x020 |
| 123 | #define SHUTDOWN 0x040 |
| 124 | #define RESTART 0x080 |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 125 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 126 | /* A mapping between "inittab" action name strings and action type codes. */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 127 | struct init_action_type { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 128 | const char *name; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 129 | int action; |
| 130 | }; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 131 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 132 | static const struct init_action_type actions[] = { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 133 | {"sysinit", SYSINIT}, |
| 134 | {"respawn", RESPAWN}, |
| 135 | {"askfirst", ASKFIRST}, |
| 136 | {"wait", WAIT}, |
| 137 | {"once", ONCE}, |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 138 | {"ctrlaltdel", CTRLALTDEL}, |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 139 | {"shutdown", SHUTDOWN}, |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 140 | {"restart", RESTART}, |
Pavel Roskin | 9027bcf | 2000-07-14 15:44:25 +0000 | [diff] [blame] | 141 | {0, 0} |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 142 | }; |
| 143 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 144 | /* Set up a linked list of init_actions, to be read from inittab */ |
| 145 | struct init_action { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 146 | pid_t pid; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 147 | char command[INIT_BUFFS_SIZE]; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 148 | char terminal[CONSOLE_BUFF_SIZE]; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 149 | struct init_action *next; |
| 150 | int action; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 151 | }; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 152 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 153 | /* Static variables */ |
| 154 | static struct init_action *init_action_list = NULL; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 155 | static char console[CONSOLE_BUFF_SIZE] = _PATH_CONSOLE; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 156 | |
Eric Andersen | e707806 | 2002-07-29 08:00:16 +0000 | [diff] [blame] | 157 | #ifndef CONFIG_SYSLOGD |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 158 | static char *log = VC_5; |
Eric Andersen | e707806 | 2002-07-29 08:00:16 +0000 | [diff] [blame] | 159 | #endif |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 160 | static sig_atomic_t got_cont = 0; |
| 161 | static const int LOG = 0x1; |
| 162 | static const int CONSOLE = 0x2; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 163 | |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 164 | #if defined CONFIG_FEATURE_EXTRA_QUIET |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 165 | static const int MAYBE_CONSOLE = 0x0; |
| 166 | #else |
| 167 | #define MAYBE_CONSOLE CONSOLE |
| 168 | #endif |
| 169 | #ifndef RB_HALT_SYSTEM |
| 170 | static const int RB_HALT_SYSTEM = 0xcdef0123; |
| 171 | static const int RB_ENABLE_CAD = 0x89abcdef; |
| 172 | static const int RB_DISABLE_CAD = 0; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 173 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 174 | #define RB_POWER_OFF 0x4321fedc |
| 175 | static const int RB_AUTOBOOT = 0x01234567; |
| 176 | #endif |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 177 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 178 | static const char * const environment[] = { |
| 179 | "HOME=/", |
| 180 | "PATH=" _PATH_STDPATH, |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame^] | 181 | "SHELL=/bin/sh", |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 182 | "USER=root", |
| 183 | NULL |
| 184 | }; |
| 185 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 186 | /* Function prototypes */ |
| 187 | static void delete_init_action(struct init_action *a); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 188 | static int waitfor(const struct init_action *a); |
Eric Andersen | d5a2780 | 2003-07-05 08:39:47 +0000 | [diff] [blame] | 189 | static void halt_signal(int sig); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 190 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 191 | |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 192 | static void loop_forever(void) |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 193 | { |
| 194 | while (1) |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 195 | sleep(1); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 196 | } |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 197 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 198 | /* Print a message to the specified device. |
| 199 | * Device may be bitwise-or'd from LOG | CONSOLE */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 200 | #ifndef DEBUG_INIT |
| 201 | static inline void messageD(int device, const char *fmt, ...) |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 202 | { |
| 203 | } |
| 204 | #else |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 205 | #define messageD message |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 206 | #endif |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 207 | static void message(int device, const char *fmt, ...) |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 208 | __attribute__ ((format(printf, 2, 3))); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 209 | static void message(int device, const char *fmt, ...) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 210 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 211 | va_list arguments; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 212 | int l; |
Eric Andersen | 2223701 | 2003-01-23 07:08:26 +0000 | [diff] [blame] | 213 | char msg[1024]; |
| 214 | #ifndef CONFIG_SYSLOGD |
| 215 | static int log_fd = -1; |
| 216 | #endif |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 217 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 218 | msg[0] = '\r'; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 219 | va_start(arguments, fmt); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 220 | l = vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments) + 1; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 221 | va_end(arguments); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 222 | |
| 223 | #ifdef CONFIG_SYSLOGD |
| 224 | /* Log the message to syslogd */ |
| 225 | if (device & LOG) { |
| 226 | /* don`t out "\r\n" */ |
| 227 | syslog_msg(LOG_DAEMON, LOG_INFO, msg + 1); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 228 | } |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 229 | |
| 230 | msg[l++] = '\n'; |
| 231 | msg[l] = 0; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 232 | #else |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 233 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 234 | msg[l++] = '\n'; |
| 235 | msg[l] = 0; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 236 | /* Take full control of the log tty, and never close it. |
| 237 | * It's mine, all mine! Muhahahaha! */ |
| 238 | if (log_fd < 0) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 239 | if ((log_fd = device_open(log, O_RDWR | O_NDELAY | O_NOCTTY)) < 0) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 240 | log_fd = -2; |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 241 | bb_error_msg("Bummer, can't write to log on %s!", log); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 242 | device = CONSOLE; |
Eric Andersen | 6a97990 | 2002-09-30 20:08:53 +0000 | [diff] [blame] | 243 | } else { |
| 244 | fcntl(log_fd, F_SETFD, FD_CLOEXEC); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 245 | } |
| 246 | } |
| 247 | if ((device & LOG) && (log_fd >= 0)) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 248 | bb_full_write(log_fd, msg, l); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 249 | } |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 250 | #endif |
| 251 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 252 | if (device & CONSOLE) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 253 | int fd = device_open(_PATH_CONSOLE, |
| 254 | O_WRONLY | O_NOCTTY | O_NDELAY); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 255 | /* Always send console messages to /dev/console so people will see them. */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 256 | if (fd >= 0) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 257 | bb_full_write(fd, msg, l); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 258 | close(fd); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 259 | #ifdef DEBUG_INIT |
| 260 | /* all descriptors may be closed */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 261 | } else { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 262 | bb_error_msg("Bummer, can't print: "); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 263 | va_start(arguments, fmt); |
| 264 | vfprintf(stderr, fmt, arguments); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 265 | va_end(arguments); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 266 | #endif |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 267 | } |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 268 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 269 | } |
| 270 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 271 | /* Set terminal settings to reasonable defaults */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 272 | static void set_term(int fd) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 273 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 274 | struct termios tty; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 275 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 276 | tcgetattr(fd, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 277 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 278 | /* set control chars */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 279 | tty.c_cc[VINTR] = 3; /* C-c */ |
| 280 | tty.c_cc[VQUIT] = 28; /* C-\ */ |
| 281 | tty.c_cc[VERASE] = 127; /* C-? */ |
| 282 | tty.c_cc[VKILL] = 21; /* C-u */ |
| 283 | tty.c_cc[VEOF] = 4; /* C-d */ |
Eric Andersen | 3849f9b | 2000-07-10 19:56:47 +0000 | [diff] [blame] | 284 | tty.c_cc[VSTART] = 17; /* C-q */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 285 | tty.c_cc[VSTOP] = 19; /* C-s */ |
| 286 | tty.c_cc[VSUSP] = 26; /* C-z */ |
Eric Andersen | 02bc25b | 2000-07-06 21:29:32 +0000 | [diff] [blame] | 287 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 288 | /* use line dicipline 0 */ |
| 289 | tty.c_line = 0; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 290 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 291 | /* Make it be sane */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 292 | tty.c_cflag &= CBAUD | CBAUDEX | CSIZE | CSTOPB | PARENB | PARODD; |
| 293 | tty.c_cflag |= CREAD | HUPCL | CLOCAL; |
Eric Andersen | d886292 | 2001-04-23 15:14:11 +0000 | [diff] [blame] | 294 | |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 295 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 296 | /* input modes */ |
| 297 | tty.c_iflag = ICRNL | IXON | IXOFF; |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 298 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 299 | /* output modes */ |
| 300 | tty.c_oflag = OPOST | ONLCR; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 301 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 302 | /* local modes */ |
| 303 | tty.c_lflag = |
| 304 | ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 305 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 306 | tcsetattr(fd, TCSANOW, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 307 | } |
| 308 | |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 309 | /* How much memory does this machine have? |
| 310 | Units are kBytes to avoid overflow on 4GB machines */ |
Glenn L McGrath | ce6482e | 2003-08-26 02:14:58 +0000 | [diff] [blame] | 311 | static unsigned int check_free_memory(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 312 | { |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 313 | struct sysinfo info; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 314 | unsigned int result, u, s = 10; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 315 | |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 316 | if (sysinfo(&info) != 0) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 317 | bb_perror_msg("Error checking free memory"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 318 | return -1; |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 319 | } |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 320 | |
| 321 | /* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes. |
| 322 | * Kernels 2.4.0 return info.mem_unit in bytes. */ |
| 323 | u = info.mem_unit; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 324 | if (u == 0) |
| 325 | u = 1; |
| 326 | while ((u & 1) == 0 && s > 0) { |
| 327 | u >>= 1; |
| 328 | s--; |
| 329 | } |
| 330 | result = (info.totalram >> s) + (info.totalswap >> s); |
Glenn L McGrath | ce6482e | 2003-08-26 02:14:58 +0000 | [diff] [blame] | 331 | if ((unsigned long long) (result * u) > UINT_MAX) { |
| 332 | return(UINT_MAX); |
| 333 | } else { |
| 334 | return(result * u); |
| 335 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 336 | } |
| 337 | |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 338 | static void console_init(void) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 339 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 340 | int fd; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 341 | int tried = 0; |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 342 | struct vt_stat vt; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 343 | struct serial_struct sr; |
| 344 | char *s; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 345 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 346 | if ((s = getenv("CONSOLE")) != NULL || (s = getenv("console")) != NULL) { |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 347 | safe_strncpy(console, s, sizeof(console)); |
Eric Andersen | fbb39c8 | 1999-11-08 17:00:52 +0000 | [diff] [blame] | 348 | #if #cpu(sparc) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 349 | /* sparc kernel supports console=tty[ab] parameter which is also |
| 350 | * passed to init, so catch it here */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 351 | /* remap tty[ab] to /dev/ttyS[01] */ |
| 352 | if (strcmp(s, "ttya") == 0) |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 353 | safe_strncpy(console, SC_0, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 354 | else if (strcmp(s, "ttyb") == 0) |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 355 | safe_strncpy(console, SC_1, sizeof(console)); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 356 | #endif |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 357 | } else { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 358 | /* 2.2 kernels: identify the real console backend and try to use it */ |
| 359 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
| 360 | /* this is a serial console */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 361 | snprintf(console, sizeof(console) - 1, SC_FORMAT, sr.line); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 362 | } else if (ioctl(0, VT_GETSTATE, &vt) == 0) { |
| 363 | /* this is linux virtual tty */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 364 | snprintf(console, sizeof(console) - 1, VC_FORMAT, vt.v_active); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 365 | } else { |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 366 | safe_strncpy(console, _PATH_CONSOLE, sizeof(console)); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 367 | tried++; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 368 | } |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 369 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 370 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 371 | while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0 && tried < 2) { |
| 372 | /* Can't open selected console -- try |
| 373 | logical system console and VT_MASTER */ |
| 374 | safe_strncpy(console, (tried == 0 ? _PATH_CONSOLE : CURRENT_VC), |
| 375 | sizeof(console)); |
| 376 | tried++; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 377 | } |
| 378 | if (fd < 0) { |
| 379 | /* Perhaps we should panic here? */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 380 | #ifndef CONFIG_SYSLOGD |
| 381 | log = |
| 382 | #endif |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 383 | safe_strncpy(console, "/dev/null", sizeof(console)); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 384 | } else { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 385 | s = getenv("TERM"); |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame] | 386 | /* check for serial console */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 387 | if (ioctl(fd, TIOCGSERIAL, &sr) == 0) { |
Erik Andersen | fa4718e | 2000-02-21 19:25:12 +0000 | [diff] [blame] | 388 | /* Force the TERM setting to vt102 for serial console -- |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame] | 389 | * if TERM is set to linux (the default) */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 390 | if (s == NULL || strcmp(s, "linux") == 0) |
| 391 | putenv("TERM=vt102"); |
| 392 | #ifndef CONFIG_SYSLOGD |
| 393 | log = console; |
| 394 | #endif |
| 395 | } else { |
| 396 | if (s == NULL) |
| 397 | putenv("TERM=linux"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 398 | } |
| 399 | close(fd); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 400 | } |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 401 | messageD(LOG, "console=%s", console); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 402 | } |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 403 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 404 | static void fixup_argv(int argc, char **argv, char *new_argv0) |
| 405 | { |
| 406 | int len; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 407 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 408 | /* Fix up argv[0] to be certain we claim to be init */ |
| 409 | len = strlen(argv[0]); |
| 410 | memset(argv[0], 0, len); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 411 | safe_strncpy(argv[0], new_argv0, len + 1); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 412 | |
| 413 | /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */ |
| 414 | len = 1; |
| 415 | while (argc > len) { |
| 416 | memset(argv[len], 0, strlen(argv[len])); |
| 417 | len++; |
| 418 | } |
| 419 | } |
| 420 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 421 | static pid_t run(const struct init_action *a) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 422 | { |
| 423 | struct stat sb; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 424 | int i, junk; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 425 | pid_t pid, pgrp, tmp_pid; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 426 | char *s, *tmpCmd, *cmd[INIT_BUFFS_SIZE], *cmdpath; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 427 | char buf[INIT_BUFFS_SIZE + 6]; /* INIT_BUFFS_SIZE+strlen("exec ")+1 */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 428 | sigset_t nmask, omask; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 429 | static const char press_enter[] = |
| 430 | #ifdef CUSTOMIZED_BANNER |
| 431 | #include CUSTOMIZED_BANNER |
| 432 | #endif |
| 433 | "\nPlease press Enter to activate this console. "; |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 434 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 435 | /* Block sigchild while forking. */ |
| 436 | sigemptyset(&nmask); |
| 437 | sigaddset(&nmask, SIGCHLD); |
| 438 | sigprocmask(SIG_BLOCK, &nmask, &omask); |
| 439 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 440 | if ((pid = fork()) == 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 441 | /* Clean up */ |
| 442 | close(0); |
| 443 | close(1); |
| 444 | close(2); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 445 | sigprocmask(SIG_SETMASK, &omask, NULL); |
| 446 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 447 | /* Reset signal handlers that were set by the parent process */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 448 | signal(SIGUSR1, SIG_DFL); |
| 449 | signal(SIGUSR2, SIG_DFL); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 450 | signal(SIGINT, SIG_DFL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 451 | signal(SIGTERM, SIG_DFL); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 452 | signal(SIGHUP, SIG_DFL); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 453 | signal(SIGCONT, SIG_DFL); |
| 454 | signal(SIGSTOP, SIG_DFL); |
| 455 | signal(SIGTSTP, SIG_DFL); |
Eric Andersen | 2f6c04f | 1999-11-01 23:59:44 +0000 | [diff] [blame] | 456 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 457 | /* Create a new session and make ourself the process |
Eric Andersen | e8a90fb | 2002-10-12 04:05:48 +0000 | [diff] [blame] | 458 | * group leader */ |
| 459 | setsid(); |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 460 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 461 | /* Open the new terminal device */ |
Eric Andersen | e8a90fb | 2002-10-12 04:05:48 +0000 | [diff] [blame] | 462 | if ((device_open(a->terminal, O_RDWR)) < 0) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 463 | if (stat(a->terminal, &sb) != 0) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 464 | message(LOG | CONSOLE, "device '%s' does not exist.", |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 465 | a->terminal); |
| 466 | _exit(1); |
Eric Andersen | 53f5061 | 2001-03-14 09:01:11 +0000 | [diff] [blame] | 467 | } |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 468 | message(LOG | CONSOLE, "Bummer, can't open %s", a->terminal); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 469 | _exit(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 470 | } |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 471 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 472 | /* Make sure the terminal will act fairly normal for us */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 473 | set_term(0); |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 474 | /* Setup stdout, stderr for the new process so |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 475 | * they point to the supplied terminal */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 476 | dup(0); |
| 477 | dup(0); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 478 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 479 | /* If the init Action requires us to wait, then force the |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 480 | * supplied terminal to be the controlling tty. */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 481 | if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 482 | |
| 483 | /* Now fork off another process to just hang around */ |
| 484 | if ((pid = fork()) < 0) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 485 | message(LOG | CONSOLE, "Can't fork!"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 486 | _exit(1); |
| 487 | } |
| 488 | |
| 489 | if (pid > 0) { |
| 490 | |
| 491 | /* We are the parent -- wait till the child is done */ |
| 492 | signal(SIGINT, SIG_IGN); |
| 493 | signal(SIGTSTP, SIG_IGN); |
| 494 | signal(SIGQUIT, SIG_IGN); |
| 495 | signal(SIGCHLD, SIG_DFL); |
| 496 | |
| 497 | /* Wait for child to exit */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 498 | while ((tmp_pid = waitpid(pid, &junk, 0)) != pid); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 499 | |
| 500 | /* See if stealing the controlling tty back is necessary */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 501 | pgrp = tcgetpgrp(0); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 502 | if (pgrp != getpid()) |
| 503 | _exit(0); |
| 504 | |
| 505 | /* Use a temporary process to steal the controlling tty. */ |
| 506 | if ((pid = fork()) < 0) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 507 | message(LOG | CONSOLE, "Can't fork!"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 508 | _exit(1); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 509 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 510 | if (pid == 0) { |
| 511 | setsid(); |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 512 | ioctl(0, TIOCSCTTY, 1); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 513 | _exit(0); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 514 | } |
| 515 | while ((tmp_pid = waitpid(pid, &junk, 0)) != pid) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 516 | if (tmp_pid < 0 && errno == ECHILD) |
| 517 | break; |
| 518 | } |
| 519 | _exit(0); |
| 520 | } |
| 521 | |
| 522 | /* Now fall though to actually execute things */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 523 | } |
| 524 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 525 | /* See if any special /bin/sh requiring characters are present */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 526 | if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame^] | 527 | cmd[0] = (char *)DEFAULT_SHELL; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 528 | cmd[1] = "-c"; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 529 | cmd[2] = strcat(strcpy(buf, "exec "), a->command); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 530 | cmd[3] = NULL; |
| 531 | } else { |
| 532 | /* Convert command (char*) into cmd (char**, one word per string) */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 533 | strcpy(buf, a->command); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 534 | s = buf; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 535 | for (tmpCmd = buf, i = 0; (tmpCmd = strsep(&s, " \t")) != NULL;) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 536 | if (*tmpCmd != '\0') { |
| 537 | cmd[i] = tmpCmd; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 538 | i++; |
| 539 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 540 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 541 | cmd[i] = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 542 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 543 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 544 | cmdpath = cmd[0]; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 545 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 546 | /* |
| 547 | Interactive shells want to see a dash in argv[0]. This |
| 548 | typically is handled by login, argv will be setup this |
| 549 | way if a dash appears at the front of the command path |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 550 | (like "-/bin/sh"). |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 551 | */ |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 552 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 553 | if (*cmdpath == '-') { |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 554 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 555 | /* skip over the dash */ |
| 556 | ++cmdpath; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 557 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 558 | /* find the last component in the command pathname */ |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 559 | s = bb_get_last_path_component(cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 560 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 561 | /* make a new argv[0] */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 562 | if ((cmd[0] = malloc(strlen(s) + 2)) == NULL) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 563 | message(LOG | CONSOLE, bb_msg_memory_exhausted); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 564 | cmd[0] = cmdpath; |
| 565 | } else { |
| 566 | cmd[0][0] = '-'; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 567 | strcpy(cmd[0] + 1, s); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 568 | } |
| 569 | } |
| 570 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 571 | if (a->action & ASKFIRST) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 572 | char c; |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 573 | /* |
| 574 | * Save memory by not exec-ing anything large (like a shell) |
| 575 | * before the user wants it. This is critical if swap is not |
| 576 | * enabled and the system has low memory. Generally this will |
| 577 | * be run on the second virtual console, and the first will |
| 578 | * be allowed to start a shell or whatever an init script |
| 579 | * specifies. |
| 580 | */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 581 | messageD(LOG, "Waiting for enter to start '%s'" |
| 582 | "(pid %d, terminal %s)\n", |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 583 | cmdpath, getpid(), a->terminal); |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 584 | bb_full_write(1, press_enter, sizeof(press_enter) - 1); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 585 | while(read(0, &c, 1) == 1 && c != '\n') |
| 586 | ; |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 587 | } |
| 588 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 589 | /* Log the process name and args */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 590 | message(LOG, "Starting pid %d, console %s: '%s'", |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 591 | getpid(), a->terminal, cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 592 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 593 | #if defined CONFIG_FEATURE_INIT_COREDUMPS |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 594 | if (stat(CORE_ENABLE_FLAG_FILE, &sb) == 0) { |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 595 | struct rlimit limit; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 596 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 597 | limit.rlim_cur = RLIM_INFINITY; |
| 598 | limit.rlim_max = RLIM_INFINITY; |
| 599 | setrlimit(RLIMIT_CORE, &limit); |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 600 | } |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 601 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 602 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 603 | /* Now run it. The new program will take over this PID, |
| 604 | * so nothing further in init.c should be run. */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 605 | execv(cmdpath, cmd); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 606 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 607 | /* We're still here? Some error happened. */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 608 | message(LOG | CONSOLE, "Bummer, could not run '%s': %m", cmdpath); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 609 | _exit(-1); |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 610 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 611 | sigprocmask(SIG_SETMASK, &omask, NULL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 612 | return pid; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 613 | } |
| 614 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 615 | static int waitfor(const struct init_action *a) |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 616 | { |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 617 | int pid; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 618 | int status, wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 619 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 620 | pid = run(a); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 621 | while (1) { |
| 622 | wpid = wait(&status); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 623 | if (wpid > 0 && wpid != pid) { |
| 624 | continue; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 625 | } |
| 626 | if (wpid == pid) |
| 627 | break; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 628 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 629 | return wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 630 | } |
| 631 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 632 | /* Run all commands of a particular type */ |
| 633 | static void run_actions(int action) |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 634 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 635 | struct init_action *a, *tmp; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 636 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 637 | for (a = init_action_list; a; a = tmp) { |
| 638 | tmp = a->next; |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 639 | if (a->action == action) { |
Eric Andersen | 5956028 | 2002-10-22 11:45:20 +0000 | [diff] [blame] | 640 | if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 641 | waitfor(a); |
| 642 | delete_init_action(a); |
| 643 | } else if (a->action & ONCE) { |
| 644 | run(a); |
| 645 | delete_init_action(a); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 646 | } else if (a->action & (RESPAWN | ASKFIRST)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 647 | /* Only run stuff with pid==0. If they have |
| 648 | * a pid, that means it is still running */ |
| 649 | if (a->pid == 0) { |
| 650 | a->pid = run(a); |
| 651 | } |
| 652 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 653 | } |
| 654 | } |
| 655 | } |
| 656 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 657 | #ifndef DEBUG_INIT |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 658 | static void init_reboot(unsigned long magic) |
| 659 | { |
| 660 | pid_t pid; |
| 661 | /* We have to fork here, since the kernel calls do_exit(0) in |
Eric Andersen | 3c8064f | 2003-07-05 08:29:01 +0000 | [diff] [blame] | 662 | * linux/kernel/sys.c, which can cause the machine to panic when |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 663 | * the init process is killed.... */ |
| 664 | if ((pid = fork()) == 0) { |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 665 | reboot(magic); |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 666 | _exit(0); |
| 667 | } |
| 668 | waitpid (pid, NULL, 0); |
| 669 | } |
| 670 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 671 | static void shutdown_system(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 672 | { |
Eric Andersen | 813d88c | 2001-10-28 22:49:48 +0000 | [diff] [blame] | 673 | sigset_t block_signals; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 674 | |
Eric Andersen | a9cc896 | 2002-09-16 06:49:06 +0000 | [diff] [blame] | 675 | /* run everything to be run at "shutdown". This is done _prior_ |
| 676 | * to killing everything, in case people wish to use scripts to |
| 677 | * shut things down gracefully... */ |
| 678 | run_actions(SHUTDOWN); |
| 679 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 680 | /* first disable all our signals */ |
| 681 | sigemptyset(&block_signals); |
| 682 | sigaddset(&block_signals, SIGHUP); |
| 683 | sigaddset(&block_signals, SIGCHLD); |
| 684 | sigaddset(&block_signals, SIGUSR1); |
| 685 | sigaddset(&block_signals, SIGUSR2); |
| 686 | sigaddset(&block_signals, SIGINT); |
| 687 | sigaddset(&block_signals, SIGTERM); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 688 | sigaddset(&block_signals, SIGCONT); |
| 689 | sigaddset(&block_signals, SIGSTOP); |
| 690 | sigaddset(&block_signals, SIGTSTP); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 691 | sigprocmask(SIG_BLOCK, &block_signals, NULL); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 692 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 693 | /* Allow Ctrl-Alt-Del to reboot system. */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 694 | init_reboot(RB_ENABLE_CAD); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 695 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 696 | message(CONSOLE | LOG, "The system is going down NOW !!"); |
Eric Andersen | cf8c9cf | 1999-11-05 00:31:46 +0000 | [diff] [blame] | 697 | sync(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 698 | |
| 699 | /* Send signals to every process _except_ pid 1 */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 700 | message(CONSOLE | LOG, "Sending SIGTERM to all processes."); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 701 | kill(-1, SIGTERM); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 702 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 703 | sync(); |
| 704 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 705 | message(CONSOLE | LOG, "Sending SIGKILL to all processes."); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 706 | kill(-1, SIGKILL); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 707 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 708 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 709 | sync(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 710 | } |
| 711 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 712 | static void exec_signal(int sig) |
| 713 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 714 | struct init_action *a, *tmp; |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 715 | sigset_t unblock_signals; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 716 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 717 | for (a = init_action_list; a; a = tmp) { |
| 718 | tmp = a->next; |
| 719 | if (a->action & RESTART) { |
Eric Andersen | d5a2780 | 2003-07-05 08:39:47 +0000 | [diff] [blame] | 720 | struct stat sb; |
| 721 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 722 | shutdown_system(); |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 723 | |
| 724 | /* unblock all signals, blocked in shutdown_system() */ |
| 725 | sigemptyset(&unblock_signals); |
| 726 | sigaddset(&unblock_signals, SIGHUP); |
| 727 | sigaddset(&unblock_signals, SIGCHLD); |
| 728 | sigaddset(&unblock_signals, SIGUSR1); |
| 729 | sigaddset(&unblock_signals, SIGUSR2); |
| 730 | sigaddset(&unblock_signals, SIGINT); |
| 731 | sigaddset(&unblock_signals, SIGTERM); |
| 732 | sigaddset(&unblock_signals, SIGCONT); |
| 733 | sigaddset(&unblock_signals, SIGSTOP); |
| 734 | sigaddset(&unblock_signals, SIGTSTP); |
| 735 | sigprocmask(SIG_UNBLOCK, &unblock_signals, NULL); |
| 736 | |
Eric Andersen | 9cdef5d | 2003-07-29 06:33:12 +0000 | [diff] [blame] | 737 | /* Close whatever files are open. */ |
| 738 | close(0); |
| 739 | close(1); |
| 740 | close(2); |
| 741 | |
Eric Andersen | 3c8064f | 2003-07-05 08:29:01 +0000 | [diff] [blame] | 742 | /* Open the new terminal device */ |
| 743 | if ((device_open(a->terminal, O_RDWR)) < 0) { |
| 744 | if (stat(a->terminal, &sb) != 0) { |
| 745 | message(LOG | CONSOLE, "device '%s' does not exist.", a->terminal); |
| 746 | } else { |
| 747 | message(LOG | CONSOLE, "Bummer, can't open %s", a->terminal); |
| 748 | } |
| 749 | halt_signal(SIGUSR1); |
| 750 | } |
| 751 | |
| 752 | /* Make sure the terminal will act fairly normal for us */ |
| 753 | set_term(0); |
| 754 | /* Setup stdout, stderr on the supplied terminal */ |
| 755 | dup(0); |
| 756 | dup(0); |
| 757 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 758 | messageD(CONSOLE | LOG, "Trying to re-exec %s", a->command); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 759 | execl(a->command, a->command, NULL); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 760 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 761 | message(CONSOLE | LOG, "exec of '%s' failed: %m", |
Eric Andersen | 71ae64b | 2002-10-10 04:20:21 +0000 | [diff] [blame] | 762 | a->command); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 763 | sync(); |
| 764 | sleep(2); |
| 765 | init_reboot(RB_HALT_SYSTEM); |
| 766 | loop_forever(); |
| 767 | } |
| 768 | } |
| 769 | } |
| 770 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 771 | static void halt_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 772 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 773 | shutdown_system(); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 774 | message(CONSOLE | LOG, |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 775 | #if #cpu(s390) |
| 776 | /* Seems the s390 console is Wierd(tm). */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 777 | "The system is halted. You may reboot now." |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 778 | #else |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 779 | "The system is halted. Press Reset or turn off power" |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 780 | #endif |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 781 | ); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 782 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 783 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 784 | /* allow time for last message to reach serial console */ |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 785 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 786 | |
Eric Andersen | b01ed65 | 2003-06-27 17:08:15 +0000 | [diff] [blame] | 787 | if (sig == SIGUSR2) |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 788 | init_reboot(RB_POWER_OFF); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 789 | else |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 790 | init_reboot(RB_HALT_SYSTEM); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 791 | |
| 792 | loop_forever(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 793 | } |
| 794 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 795 | static void reboot_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 796 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 797 | shutdown_system(); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 798 | message(CONSOLE | LOG, "Please stand by while rebooting the system."); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 799 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 800 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 801 | /* allow time for last message to reach serial console */ |
| 802 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 803 | |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 804 | init_reboot(RB_AUTOBOOT); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 805 | |
| 806 | loop_forever(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 807 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 808 | |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 809 | static void ctrlaltdel_signal(int sig) |
| 810 | { |
| 811 | run_actions(CTRLALTDEL); |
| 812 | } |
| 813 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 814 | /* The SIGSTOP & SIGTSTP handler */ |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 815 | static void stop_handler(int sig) |
| 816 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 817 | int saved_errno = errno; |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 818 | |
| 819 | got_cont = 0; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 820 | while (!got_cont) |
| 821 | pause(); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 822 | got_cont = 0; |
| 823 | errno = saved_errno; |
| 824 | } |
| 825 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 826 | /* The SIGCONT handler */ |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 827 | static void cont_handler(int sig) |
| 828 | { |
| 829 | got_cont = 1; |
| 830 | } |
| 831 | |
Eric Andersen | d5868c1 | 2003-07-26 06:25:12 +0000 | [diff] [blame] | 832 | /* Reap any zombie processes that are reparented to init */ |
| 833 | static void child_handler(int sig) |
| 834 | { |
| 835 | int status; |
| 836 | while ( wait3(&status, WNOHANG, NULL) > 0 ); |
| 837 | } |
| 838 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 839 | #endif /* ! DEBUG_INIT */ |
Erik Andersen | de55287 | 2000-01-23 01:34:05 +0000 | [diff] [blame] | 840 | |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame^] | 841 | static void new_init_action(int action, const char *command, const char *cons) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 842 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 843 | struct init_action *new_action, *a; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 844 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 845 | if (*cons == '\0') |
| 846 | cons = console; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 847 | |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame] | 848 | /* do not run entries if console device is not available */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 849 | if (access(cons, R_OK | W_OK)) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 850 | return; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 851 | if (strcmp(cons, "/dev/null") == 0 && (action & ASKFIRST)) |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 852 | return; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 853 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 854 | new_action = calloc((size_t) (1), sizeof(struct init_action)); |
| 855 | if (!new_action) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 856 | message(LOG | CONSOLE, "Memory allocation failure"); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 857 | loop_forever(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 858 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 859 | |
| 860 | /* Append to the end of the list */ |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 861 | for (a = init_action_list; a && a->next; a = a->next) { |
| 862 | /* don't enter action if it's already in the list */ |
| 863 | if ((strcmp(a->command, command) == 0) && |
| 864 | (strcmp(a->terminal, cons) ==0)) { |
| 865 | free(new_action); |
| 866 | return; |
| 867 | } |
| 868 | } |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 869 | if (a) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 870 | a->next = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 871 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 872 | init_action_list = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 873 | } |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 874 | strcpy(new_action->command, command); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 875 | new_action->action = action; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 876 | strcpy(new_action->terminal, cons); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 877 | #if 0 /* calloc zeroed always */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 878 | new_action->pid = 0; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 879 | #endif |
| 880 | messageD(LOG|CONSOLE, "command='%s' action='%d' terminal='%s'\n", |
| 881 | new_action->command, new_action->action, new_action->terminal); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 882 | } |
| 883 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 884 | static void delete_init_action(struct init_action *action) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 885 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 886 | struct init_action *a, *b = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 887 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 888 | for (a = init_action_list; a; b = a, a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 889 | if (a == action) { |
| 890 | if (b == NULL) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 891 | init_action_list = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 892 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 893 | b->next = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 894 | } |
| 895 | free(a); |
| 896 | break; |
| 897 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 898 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 899 | } |
| 900 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 901 | /* Make sure there is enough memory to do something useful. * |
| 902 | * Calls "swapon -a" if needed so be sure /etc/fstab is present... */ |
| 903 | static void check_memory(void) |
| 904 | { |
| 905 | struct stat statBuf; |
| 906 | |
| 907 | if (check_free_memory() > 1000) |
| 908 | return; |
| 909 | |
| 910 | #if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) |
| 911 | if (stat("/etc/fstab", &statBuf) == 0) { |
| 912 | /* swapon -a requires /proc typically */ |
| 913 | new_init_action(SYSINIT, "/bin/mount -t proc proc /proc", ""); |
| 914 | /* Try to turn on swap */ |
| 915 | new_init_action(SYSINIT, "/sbin/swapon -a", ""); |
| 916 | run_actions(SYSINIT); /* wait and removing */ |
| 917 | if (check_free_memory() < 1000) |
| 918 | goto goodnight; |
| 919 | } else |
| 920 | goto goodnight; |
| 921 | return; |
| 922 | #endif |
| 923 | |
| 924 | goodnight: |
| 925 | message(CONSOLE, "Sorry, your computer does not have enough memory."); |
| 926 | loop_forever(); |
| 927 | } |
| 928 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 929 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 930 | * then parse_inittab() simply adds in some default |
Eric Andersen | 77d9268 | 2001-05-23 20:32:09 +0000 | [diff] [blame] | 931 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 932 | * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | 812d466 | 2000-01-07 18:30:40 +0000 | [diff] [blame] | 933 | * _is_ defined, but /etc/inittab is missing, this |
| 934 | * results in the same set of default behaviors. |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 935 | */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 936 | static void parse_inittab(void) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 937 | { |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 938 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 939 | FILE *file; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 940 | char buf[INIT_BUFFS_SIZE], lineAsRead[INIT_BUFFS_SIZE]; |
| 941 | char tmpConsole[CONSOLE_BUFF_SIZE]; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 942 | char *id, *runlev, *action, *command, *eol; |
| 943 | const struct init_action_type *a = actions; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 944 | |
| 945 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 946 | file = fopen(INITTAB, "r"); |
| 947 | if (file == NULL) { |
| 948 | /* No inittab file -- set up some default behavior */ |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 949 | #endif |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 950 | /* Reboot on Ctrl-Alt-Del */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 951 | new_init_action(CTRLALTDEL, "/sbin/reboot", ""); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 952 | /* Umount all filesystems on halt/reboot */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 953 | new_init_action(SHUTDOWN, "/bin/umount -a -r", ""); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 954 | #if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 955 | /* Swapoff on halt/reboot */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 956 | new_init_action(SHUTDOWN, "/sbin/swapoff -a", ""); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 957 | #endif |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 958 | /* Prepare to restart init when a HUP is received */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 959 | new_init_action(RESTART, "/sbin/init", ""); |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame] | 960 | /* Askfirst shell on tty1-4 */ |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame^] | 961 | new_init_action(ASKFIRST, bb_default_login_shell, ""); |
| 962 | new_init_action(ASKFIRST, bb_default_login_shell, VC_2); |
| 963 | new_init_action(ASKFIRST, bb_default_login_shell, VC_3); |
| 964 | new_init_action(ASKFIRST, bb_default_login_shell, VC_4); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 965 | /* sysinit */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 966 | new_init_action(SYSINIT, INIT_SCRIPT, ""); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 967 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 968 | return; |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 969 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 970 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 971 | |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 972 | while (fgets(buf, INIT_BUFFS_SIZE, file) != NULL) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 973 | /* Skip leading spaces */ |
| 974 | for (id = buf; *id == ' ' || *id == '\t'; id++); |
| 975 | |
| 976 | /* Skip the line if it's a comment */ |
| 977 | if (*id == '#' || *id == '\n') |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 978 | continue; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 979 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 980 | /* Trim the trailing \n */ |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 981 | eol = strrchr(id, '\n'); |
| 982 | if (eol != NULL) |
| 983 | *eol = '\0'; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 984 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 985 | /* Keep a copy around for posterity's sake (and error msgs) */ |
| 986 | strcpy(lineAsRead, buf); |
| 987 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 988 | /* Separate the ID field from the runlevels */ |
| 989 | runlev = strchr(id, ':'); |
| 990 | if (runlev == NULL || *(runlev + 1) == '\0') { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 991 | message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 992 | continue; |
| 993 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 994 | *runlev = '\0'; |
| 995 | ++runlev; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 996 | } |
| 997 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 998 | /* Separate the runlevels from the action */ |
| 999 | action = strchr(runlev, ':'); |
| 1000 | if (action == NULL || *(action + 1) == '\0') { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1001 | message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1002 | continue; |
| 1003 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 1004 | *action = '\0'; |
| 1005 | ++action; |
| 1006 | } |
| 1007 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1008 | /* Separate the action from the command */ |
| 1009 | command = strchr(action, ':'); |
| 1010 | if (command == NULL || *(command + 1) == '\0') { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1011 | message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 1012 | continue; |
| 1013 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1014 | *command = '\0'; |
| 1015 | ++command; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1016 | } |
| 1017 | |
| 1018 | /* Ok, now process it */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1019 | for (a = actions; a->name != 0; a++) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 1020 | if (strcmp(a->name, action) == 0) { |
| 1021 | if (*id != '\0') { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1022 | if(strncmp(id, "/dev/", 5) == 0) |
| 1023 | id += 5; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1024 | strcpy(tmpConsole, "/dev/"); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1025 | safe_strncpy(tmpConsole + 5, id, |
| 1026 | CONSOLE_BUFF_SIZE - 5); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 1027 | id = tmpConsole; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1028 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1029 | new_init_action(a->action, command, id); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1030 | break; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1031 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1032 | } |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1033 | if (a->name == 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1034 | /* Choke on an unknown action */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1035 | message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1036 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 1037 | } |
Eric Andersen | d8636ca | 2002-05-15 22:19:09 +0000 | [diff] [blame] | 1038 | fclose(file); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1039 | return; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 1040 | #endif /* CONFIG_FEATURE_USE_INITTAB */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 1041 | } |
| 1042 | |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 1043 | static void reload_signal(int sig) |
| 1044 | { |
| 1045 | message(LOG, "Reloading /etc/inittab"); |
| 1046 | parse_inittab(); |
| 1047 | run_actions(RESPAWN); |
| 1048 | return; |
| 1049 | } |
| 1050 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 1051 | extern int init_main(int argc, char **argv) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1052 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1053 | struct init_action *a; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1054 | pid_t wpid; |
| 1055 | int status; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1056 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 1057 | if (argc > 1 && !strcmp(argv[1], "-q")) { |
Eric Andersen | b01ed65 | 2003-06-27 17:08:15 +0000 | [diff] [blame] | 1058 | return kill_init(SIGHUP); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 1059 | } |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 1060 | #ifndef DEBUG_INIT |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 1061 | /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */ |
| 1062 | if (getpid() != 1 |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1063 | #ifdef CONFIG_FEATURE_INITRD |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1064 | && strstr(bb_applet_name, "linuxrc") == NULL |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 1065 | #endif |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 1066 | ) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1067 | bb_show_usage(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1068 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1069 | /* Set up sig handlers -- be sure to |
| 1070 | * clear all of these in run() */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 1071 | signal(SIGHUP, exec_signal); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1072 | signal(SIGUSR1, halt_signal); |
Eric Andersen | 4c95a28 | 2000-07-07 19:30:28 +0000 | [diff] [blame] | 1073 | signal(SIGUSR2, halt_signal); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 1074 | signal(SIGINT, ctrlaltdel_signal); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1075 | signal(SIGTERM, reboot_signal); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 1076 | signal(SIGCONT, cont_handler); |
| 1077 | signal(SIGSTOP, stop_handler); |
| 1078 | signal(SIGTSTP, stop_handler); |
Eric Andersen | d5868c1 | 2003-07-26 06:25:12 +0000 | [diff] [blame] | 1079 | signal(SIGCHLD, child_handler); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1080 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1081 | /* Turn off rebooting via CTL-ALT-DEL -- we get a |
| 1082 | * SIGINT on CAD so we can shut things down gracefully... */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 1083 | init_reboot(RB_DISABLE_CAD); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1084 | #endif |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 1085 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 1086 | /* Figure out where the default console should be */ |
| 1087 | console_init(); |
| 1088 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1089 | /* Close whatever files are open, and reset the console. */ |
| 1090 | close(0); |
| 1091 | close(1); |
| 1092 | close(2); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 1093 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 1094 | if (device_open(console, O_RDWR | O_NOCTTY) == 0) { |
| 1095 | set_term(0); |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 1096 | close(0); |
| 1097 | } |
| 1098 | |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1099 | chdir("/"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1100 | setsid(); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1101 | { |
| 1102 | const char * const *e; |
| 1103 | /* Make sure environs is set to something sane */ |
| 1104 | for(e = environment; *e; e++) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1105 | putenv((char *) *e); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1106 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1107 | /* Hello world */ |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1108 | message(MAYBE_CONSOLE | LOG, "init started: %s", bb_msg_full_version); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1109 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1110 | /* Make sure there is enough memory to do something useful. */ |
| 1111 | check_memory(); |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 1112 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1113 | /* Check if we are supposed to be in single user mode */ |
| 1114 | if (argc > 1 && (!strcmp(argv[1], "single") || |
| 1115 | !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1116 | /* Start a shell on console */ |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame^] | 1117 | new_init_action(RESPAWN, bb_default_login_shell, ""); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1118 | } else { |
| 1119 | /* Not in single user mode -- see what inittab says */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 1120 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1121 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1122 | * then parse_inittab() simply adds in some default |
Eric Andersen | 77d9268 | 2001-05-23 20:32:09 +0000 | [diff] [blame] | 1123 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1124 | * of "askfirst" shells */ |
| 1125 | parse_inittab(); |
Eric Andersen | d00c262 | 1999-12-07 08:37:31 +0000 | [diff] [blame] | 1126 | } |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1127 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 1128 | /* Make the command line just say "init" -- thats all, nothing else */ |
| 1129 | fixup_argv(argc, argv, "init"); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 1130 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1131 | /* Now run everything that needs to be run */ |
| 1132 | |
| 1133 | /* First run the sysinit command */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1134 | run_actions(SYSINIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1135 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1136 | /* Next run anything that wants to block */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1137 | run_actions(WAIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1138 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1139 | /* Next run anything to be run only once */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1140 | run_actions(ONCE); |
| 1141 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1142 | /* If there is nothing else to do, stop */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1143 | if (init_action_list == NULL) { |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 1144 | message(LOG | CONSOLE, |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1145 | "No more tasks for init -- sleeping forever."); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 1146 | loop_forever(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1147 | } |
| 1148 | |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 1149 | /* Redefine SIGHUP to reread /etc/inittab */ |
| 1150 | signal(SIGHUP, reload_signal); |
| 1151 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1152 | /* Now run the looping stuff for the rest of forever */ |
| 1153 | while (1) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1154 | /* run the respawn stuff */ |
| 1155 | run_actions(RESPAWN); |
| 1156 | |
| 1157 | /* run the askfirst stuff */ |
| 1158 | run_actions(ASKFIRST); |
| 1159 | |
| 1160 | /* Don't consume all CPU time -- sleep a bit */ |
| 1161 | sleep(1); |
| 1162 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1163 | /* Wait for a child process to exit */ |
| 1164 | wpid = wait(&status); |
Eric Andersen | cf1fee0 | 2002-12-17 09:48:16 +0000 | [diff] [blame] | 1165 | while (wpid > 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1166 | /* Find out who died and clean up their corpse */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1167 | for (a = init_action_list; a; a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1168 | if (a->pid == wpid) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1169 | /* Set the pid to 0 so that the process gets |
| 1170 | * restarted by run_actions() */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1171 | a->pid = 0; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1172 | message(LOG, "Process '%s' (pid %d) exited. " |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1173 | "Scheduling it for restart.", |
| 1174 | a->command, wpid); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1175 | } |
| 1176 | } |
Eric Andersen | cf1fee0 | 2002-12-17 09:48:16 +0000 | [diff] [blame] | 1177 | /* see if anyone else is waiting to be reaped */ |
| 1178 | wpid = waitpid (-1, &status, WNOHANG); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1179 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1180 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1181 | } |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 1182 | |
| 1183 | /* |
| 1184 | Local Variables: |
| 1185 | c-file-style: "linux" |
| 1186 | c-basic-offset: 4 |
| 1187 | tab-width: 4 |
| 1188 | End: |
| 1189 | */ |