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 | * |
| 5 | * |
| 6 | * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>. |
| 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 | cbe31da | 2001-02-20 06:14:08 +0000 | [diff] [blame] | 45 | #include "busybox.h" |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 46 | #ifdef CONFIG_SYSLOGD |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 47 | # include <sys/syslog.h> |
| 48 | #endif |
| 49 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 50 | #if defined(__UCLIBC__) && !defined(__UCLIBC_HAS_MMU__) |
| 51 | #define fork vfork |
| 52 | #endif |
Pavel Roskin | 9c5fcc3 | 2000-07-17 23:45:12 +0000 | [diff] [blame] | 53 | |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 54 | /* From <linux/vt.h> */ |
| 55 | struct vt_stat { |
| 56 | unsigned short v_active; /* active vt */ |
| 57 | unsigned short v_signal; /* signal to send */ |
| 58 | unsigned short v_state; /* vt bitmask */ |
| 59 | }; |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 60 | static const int VT_GETSTATE = 0x5603; /* get global vt state info */ |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 61 | |
| 62 | /* From <linux/serial.h> */ |
| 63 | struct serial_struct { |
| 64 | int type; |
| 65 | int line; |
| 66 | int port; |
| 67 | int irq; |
| 68 | int flags; |
| 69 | int xmit_fifo_size; |
| 70 | int custom_divisor; |
| 71 | int baud_base; |
| 72 | unsigned short close_delay; |
| 73 | char reserved_char[2]; |
| 74 | int hub6; |
| 75 | unsigned short closing_wait; /* time to wait before closing */ |
| 76 | unsigned short closing_wait2; /* no longer used... */ |
| 77 | int reserved[4]; |
| 78 | }; |
| 79 | |
| 80 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 81 | #if (__GNU_LIBRARY__ > 5) || defined(__dietlibc__) |
| 82 | #include <sys/reboot.h> |
| 83 | #define init_reboot(magic) reboot(magic) |
| 84 | #else |
| 85 | #define init_reboot(magic) reboot(0xfee1dead, 672274793, magic) |
| 86 | #endif |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 87 | |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 88 | #ifndef _PATH_STDPATH |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 89 | #define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin" |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 90 | #endif |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 91 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 92 | #if defined CONFIG_FEATURE_INIT_COREDUMPS |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 93 | /* |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 94 | * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called |
| 95 | * before processes are spawned to set core file size as unlimited. |
| 96 | * This is for debugging only. Don't use this is production, unless |
| 97 | * you want core dumps lying about.... |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 98 | */ |
| 99 | #define CORE_ENABLE_FLAG_FILE "/.init_enable_core" |
| 100 | #include <sys/resource.h> |
| 101 | #include <sys/time.h> |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 102 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 103 | |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 104 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 105 | |
Eric Andersen | b6b519b | 2001-04-09 23:52:18 +0000 | [diff] [blame] | 106 | #if __GNU_LIBRARY__ > 5 |
| 107 | #include <sys/kdaemon.h> |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 108 | #else |
Eric Andersen | b6b519b | 2001-04-09 23:52:18 +0000 | [diff] [blame] | 109 | extern int bdflush (int func, long int data); |
| 110 | #endif |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 111 | |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 112 | #define SHELL "/bin/sh" /* Default shell */ |
| 113 | #define LOGIN_SHELL "-" SHELL /* Default login shell */ |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 114 | #define INITTAB "/etc/inittab" /* inittab file location */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 115 | #ifndef INIT_SCRIPT |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 116 | #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 117 | #endif |
Erik Andersen | 9c88cac | 1999-12-30 09:25:17 +0000 | [diff] [blame] | 118 | |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 119 | #define MAXENV 16 /* Number of env. vars */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 120 | |
| 121 | /* Allowed init action types */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 122 | #define SYSINIT 0x001 |
| 123 | #define RESPAWN 0x002 |
| 124 | #define ASKFIRST 0x004 |
| 125 | #define WAIT 0x008 |
| 126 | #define ONCE 0x010 |
| 127 | #define CTRLALTDEL 0x020 |
| 128 | #define SHUTDOWN 0x040 |
| 129 | #define RESTART 0x080 |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 130 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 131 | /* A mapping between "inittab" action name strings and action type codes. */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 132 | struct init_action_type { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 133 | const char *name; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 134 | int action; |
| 135 | }; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 136 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 137 | static const struct init_action_type actions[] = { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 138 | {"sysinit", SYSINIT}, |
| 139 | {"respawn", RESPAWN}, |
| 140 | {"askfirst", ASKFIRST}, |
| 141 | {"wait", WAIT}, |
| 142 | {"once", ONCE}, |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 143 | {"ctrlaltdel", CTRLALTDEL}, |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 144 | {"shutdown", SHUTDOWN}, |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 145 | {"restart", RESTART}, |
Pavel Roskin | 9027bcf | 2000-07-14 15:44:25 +0000 | [diff] [blame] | 146 | {0, 0} |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 147 | }; |
| 148 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 149 | /* Set up a linked list of init_actions, to be read from inittab */ |
| 150 | struct init_action { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 151 | pid_t pid; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 152 | char command[256]; |
| 153 | char terminal[256]; |
| 154 | struct init_action *next; |
| 155 | int action; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 156 | }; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 157 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 158 | /* Static variables */ |
| 159 | static struct init_action *init_action_list = NULL; |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 160 | static char *secondConsole = VC_2; |
| 161 | static char *thirdConsole = VC_3; |
| 162 | static char *fourthConsole = VC_4; |
| 163 | static char *log = VC_5; |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 164 | static int kernelVersion = 0; |
| 165 | static char termType[32] = "TERM=linux"; |
| 166 | static char console[32] = _PATH_CONSOLE; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 167 | static sig_atomic_t got_cont = 0; |
| 168 | static const int LOG = 0x1; |
| 169 | static const int CONSOLE = 0x2; |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 170 | #if defined CONFIG_FEATURE_EXTRA_QUIET |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 171 | static const int MAYBE_CONSOLE = 0x0; |
| 172 | #else |
| 173 | #define MAYBE_CONSOLE CONSOLE |
| 174 | #endif |
| 175 | #ifndef RB_HALT_SYSTEM |
| 176 | static const int RB_HALT_SYSTEM = 0xcdef0123; |
| 177 | static const int RB_ENABLE_CAD = 0x89abcdef; |
| 178 | static const int RB_DISABLE_CAD = 0; |
| 179 | #define RB_POWER_OFF 0x4321fedc |
| 180 | static const int RB_AUTOBOOT = 0x01234567; |
| 181 | #endif |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 182 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 183 | /* Function prototypes */ |
| 184 | static void delete_init_action(struct init_action *a); |
| 185 | static int waitfor(struct init_action *a); |
| 186 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 187 | |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 188 | static void loop_forever(void) |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 189 | { |
| 190 | while (1) |
| 191 | sleep (1); |
| 192 | } |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 193 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 194 | /* Print a message to the specified device. |
| 195 | * Device may be bitwise-or'd from LOG | CONSOLE */ |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 196 | #ifdef DEBUG_INIT |
| 197 | static inline messageND(int device, char *fmt, ...) { } |
| 198 | #else |
| 199 | #define messageND message |
| 200 | #endif |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 201 | static void message(int device, char *fmt, ...) __attribute__ ((format (printf, 2, 3))); |
Erik Andersen | 93d6513 | 2000-04-06 08:06:36 +0000 | [diff] [blame] | 202 | static void message(int device, char *fmt, ...) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 203 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 204 | va_list arguments; |
| 205 | int fd; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 206 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 207 | #ifdef CONFIG_SYSLOGD |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 208 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 209 | /* Log the message to syslogd */ |
| 210 | if (device & LOG) { |
| 211 | char msg[1024]; |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 212 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 213 | va_start(arguments, fmt); |
| 214 | vsnprintf(msg, sizeof(msg), fmt, arguments); |
| 215 | va_end(arguments); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 216 | syslog_msg(LOG_USER, LOG_INFO, msg); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 217 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 218 | #else |
| 219 | static int log_fd = -1; |
| 220 | |
| 221 | /* Take full control of the log tty, and never close it. |
| 222 | * It's mine, all mine! Muhahahaha! */ |
| 223 | if (log_fd < 0) { |
| 224 | if (log == NULL) { |
| 225 | /* don't even try to log, because there is no such console */ |
| 226 | log_fd = -2; |
| 227 | /* log to main console instead */ |
| 228 | device = CONSOLE; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 229 | } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) { |
| 230 | log_fd = -2; |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 231 | fprintf(stderr, "Bummer, can't write to log on %s!\n", log); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 232 | log = NULL; |
| 233 | device = CONSOLE; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 234 | } |
| 235 | } |
| 236 | if ((device & LOG) && (log_fd >= 0)) { |
| 237 | va_start(arguments, fmt); |
| 238 | vdprintf(log_fd, fmt, arguments); |
| 239 | va_end(arguments); |
| 240 | } |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 241 | #endif |
| 242 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 243 | if (device & CONSOLE) { |
| 244 | /* Always send console messages to /dev/console so people will see them. */ |
| 245 | if ( |
| 246 | (fd = |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 247 | device_open(_PATH_CONSOLE, O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 248 | va_start(arguments, fmt); |
| 249 | vdprintf(fd, fmt, arguments); |
| 250 | va_end(arguments); |
| 251 | close(fd); |
| 252 | } else { |
| 253 | fprintf(stderr, "Bummer, can't print: "); |
| 254 | va_start(arguments, fmt); |
| 255 | vfprintf(stderr, fmt, arguments); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 256 | va_end(arguments); |
| 257 | } |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 258 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 259 | } |
| 260 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 261 | /* Set terminal settings to reasonable defaults */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 262 | static void set_term(int fd) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 263 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 264 | struct termios tty; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 265 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 266 | tcgetattr(fd, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 267 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 268 | /* set control chars */ |
Eric Andersen | 3849f9b | 2000-07-10 19:56:47 +0000 | [diff] [blame] | 269 | tty.c_cc[VINTR] = 3; /* C-c */ |
| 270 | tty.c_cc[VQUIT] = 28; /* C-\ */ |
| 271 | tty.c_cc[VERASE] = 127; /* C-? */ |
| 272 | tty.c_cc[VKILL] = 21; /* C-u */ |
| 273 | tty.c_cc[VEOF] = 4; /* C-d */ |
| 274 | tty.c_cc[VSTART] = 17; /* C-q */ |
| 275 | tty.c_cc[VSTOP] = 19; /* C-s */ |
| 276 | tty.c_cc[VSUSP] = 26; /* C-z */ |
Eric Andersen | 02bc25b | 2000-07-06 21:29:32 +0000 | [diff] [blame] | 277 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 278 | /* use line dicipline 0 */ |
| 279 | tty.c_line = 0; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 280 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 281 | /* Make it be sane */ |
Erik Andersen | 6c41c44 | 2000-03-19 05:13:49 +0000 | [diff] [blame] | 282 | tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD; |
Eric Andersen | d886292 | 2001-04-23 15:14:11 +0000 | [diff] [blame] | 283 | tty.c_cflag |= CREAD|HUPCL|CLOCAL; |
| 284 | |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 285 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 286 | /* input modes */ |
| 287 | tty.c_iflag = ICRNL | IXON | IXOFF; |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 288 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 289 | /* output modes */ |
| 290 | tty.c_oflag = OPOST | ONLCR; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 291 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 292 | /* local modes */ |
| 293 | tty.c_lflag = |
| 294 | ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 295 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 296 | tcsetattr(fd, TCSANOW, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 297 | } |
| 298 | |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 299 | /* How much memory does this machine have? |
| 300 | Units are kBytes to avoid overflow on 4GB machines */ |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 301 | static int check_free_memory(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 302 | { |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 303 | struct sysinfo info; |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 304 | unsigned int result, u, s=10; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 305 | |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 306 | if (sysinfo(&info) != 0) { |
Eric Andersen | 53cfb7e | 2001-01-31 17:29:47 +0000 | [diff] [blame] | 307 | perror_msg("Error checking free memory"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 308 | return -1; |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 309 | } |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 310 | |
| 311 | /* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes. |
| 312 | * Kernels 2.4.0 return info.mem_unit in bytes. */ |
| 313 | u = info.mem_unit; |
| 314 | if (u==0) u=1; |
| 315 | while ( (u&1) == 0 && s > 0 ) { u>>=1; s--; } |
| 316 | result = (info.totalram>>s) + (info.totalswap>>s); |
| 317 | result = result*u; |
| 318 | if (result < 0) result = INT_MAX; |
| 319 | return result; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 320 | } |
| 321 | |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 322 | static void console_init(void) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 323 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 324 | int fd; |
| 325 | int tried_devcons = 0; |
| 326 | int tried_vtprimary = 0; |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 327 | struct vt_stat vt; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 328 | struct serial_struct sr; |
| 329 | char *s; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 330 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 331 | if ((s = getenv("TERM")) != NULL) { |
| 332 | snprintf(termType, sizeof(termType) - 1, "TERM=%s", s); |
| 333 | } |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 334 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 335 | if ((s = getenv("CONSOLE")) != NULL) { |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 336 | safe_strncpy(console, s, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 337 | } |
Eric Andersen | fbb39c8 | 1999-11-08 17:00:52 +0000 | [diff] [blame] | 338 | #if #cpu(sparc) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 339 | /* sparc kernel supports console=tty[ab] parameter which is also |
| 340 | * passed to init, so catch it here */ |
| 341 | else if ((s = getenv("console")) != NULL) { |
| 342 | /* remap tty[ab] to /dev/ttyS[01] */ |
| 343 | if (strcmp(s, "ttya") == 0) |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 344 | safe_strncpy(console, SC_0, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 345 | else if (strcmp(s, "ttyb") == 0) |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 346 | safe_strncpy(console, SC_1, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 347 | } |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 348 | #endif |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 349 | else { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 350 | /* 2.2 kernels: identify the real console backend and try to use it */ |
| 351 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
| 352 | /* this is a serial console */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 353 | snprintf(console, sizeof(console) - 1, SC_FORMAT, sr.line); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 354 | } else if (ioctl(0, VT_GETSTATE, &vt) == 0) { |
| 355 | /* this is linux virtual tty */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 356 | snprintf(console, sizeof(console) - 1, VC_FORMAT, vt.v_active); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 357 | } else { |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 358 | safe_strncpy(console, _PATH_CONSOLE, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 359 | tried_devcons++; |
| 360 | } |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 361 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 362 | |
| 363 | while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) { |
| 364 | /* Can't open selected console -- try /dev/console */ |
| 365 | if (!tried_devcons) { |
| 366 | tried_devcons++; |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 367 | safe_strncpy(console, _PATH_CONSOLE, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 368 | continue; |
| 369 | } |
| 370 | /* Can't open selected console -- try vt1 */ |
| 371 | if (!tried_vtprimary) { |
| 372 | tried_vtprimary++; |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 373 | safe_strncpy(console, VC_1, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 374 | continue; |
| 375 | } |
| 376 | break; |
| 377 | } |
| 378 | if (fd < 0) { |
| 379 | /* Perhaps we should panic here? */ |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 380 | safe_strncpy(console, "/dev/null", sizeof(console)); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 381 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 382 | /* check for serial console and disable logging to tty5 & |
| 383 | * running a shell to tty2-4 */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 384 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 385 | log = NULL; |
| 386 | secondConsole = NULL; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 387 | thirdConsole = NULL; |
| 388 | fourthConsole = NULL; |
Erik Andersen | fa4718e | 2000-02-21 19:25:12 +0000 | [diff] [blame] | 389 | /* Force the TERM setting to vt102 for serial console -- |
| 390 | * iff TERM is set to linux (the default) */ |
| 391 | if (strcmp( termType, "TERM=linux" ) == 0) |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 392 | safe_strncpy(termType, "TERM=vt102", sizeof(termType)); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 393 | message(LOG | CONSOLE, |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 394 | "\rserial console detected. Disabling virtual terminals.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 395 | } |
| 396 | close(fd); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 397 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 398 | message(LOG, "console=%s\n", console); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 399 | } |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 400 | |
| 401 | static void fixup_argv(int argc, char **argv, char *new_argv0) |
| 402 | { |
| 403 | int len; |
| 404 | /* Fix up argv[0] to be certain we claim to be init */ |
| 405 | len = strlen(argv[0]); |
| 406 | memset(argv[0], 0, len); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 407 | safe_strncpy(argv[0], new_argv0, len + 1); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 408 | |
| 409 | /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */ |
| 410 | len = 1; |
| 411 | while (argc > len) { |
| 412 | memset(argv[len], 0, strlen(argv[len])); |
| 413 | len++; |
| 414 | } |
| 415 | } |
| 416 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 417 | /* Make sure there is enough memory to do something useful. * |
| 418 | * Calls "swapon -a" if needed so be sure /etc/fstab is present... */ |
| 419 | static void check_memory(void) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 420 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 421 | struct stat statBuf; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 422 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 423 | if (check_free_memory() > 1000) |
| 424 | return; |
| 425 | |
| 426 | #if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) |
| 427 | if (stat("/etc/fstab", &statBuf) == 0) { |
| 428 | /* swapon -a requires /proc typically */ |
| 429 | system("/bin/mount -t proc proc /proc"); |
| 430 | /* Try to turn on swap */ |
| 431 | system("/sbin/swapon -a"); |
| 432 | if (check_free_memory() < 1000) |
| 433 | goto goodnight; |
| 434 | } else |
| 435 | goto goodnight; |
| 436 | return; |
Eric Andersen | 3862423 | 2001-01-25 00:04:16 +0000 | [diff] [blame] | 437 | #endif |
| 438 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 439 | goodnight: |
| 440 | message(CONSOLE, |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 441 | "\rSorry, your computer does not have enough memory.\n"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 442 | loop_forever(); |
| 443 | } |
| 444 | |
| 445 | static pid_t run(struct init_action *a) |
| 446 | { |
| 447 | struct stat sb; |
| 448 | int i, j, fd, junk; |
| 449 | pid_t pid, pgrp, tmp_pid; |
| 450 | char *s, *tmpCmd, *cmd[255], *cmdpath, buf[255]; |
| 451 | sigset_t nmask, omask; |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 452 | char *environment[MAXENV+1] = { |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 453 | termType, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 454 | "HOME=/", |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 455 | "PATH=" _PATH_STDPATH, |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 456 | "SHELL=" SHELL, |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 457 | "USER=root", |
| 458 | NULL |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 459 | }; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 460 | static const char press_enter[] = |
| 461 | #ifdef CUSTOMIZED_BANNER |
| 462 | #include CUSTOMIZED_BANNER |
| 463 | #endif |
| 464 | "\nPlease press Enter to activate this console. "; |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 465 | |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 466 | /* inherit environment to the child, merging our values -andy */ |
| 467 | for (i=0; environ[i]; i++) { |
| 468 | for (j=0; environment[j]; j++) { |
| 469 | s = strchr(environment[j], '='); |
| 470 | if (!strncmp(environ[i], environment[j], s - environment[j])) |
| 471 | break; |
| 472 | } |
| 473 | if (!environment[j]) { |
| 474 | environment[j++] = environ[i]; |
| 475 | environment[j] = NULL; |
| 476 | } |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 477 | } |
| 478 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 479 | /* Block sigchild while forking. */ |
| 480 | sigemptyset(&nmask); |
| 481 | sigaddset(&nmask, SIGCHLD); |
| 482 | sigprocmask(SIG_BLOCK, &nmask, &omask); |
| 483 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 484 | if ((pid = fork()) == 0) |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 485 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 486 | /* Clean up */ |
Eric Andersen | fb6a508 | 2000-09-13 16:15:29 +0000 | [diff] [blame] | 487 | ioctl(0, TIOCNOTTY, 0); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 488 | close(0); |
| 489 | close(1); |
| 490 | close(2); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 491 | sigprocmask(SIG_SETMASK, &omask, NULL); |
| 492 | |
| 493 | /* Create a new session and make ourself the process group leader */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 494 | setsid(); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 495 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 496 | /* Reset signal handlers that were set by the parent process */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 497 | signal(SIGUSR1, SIG_DFL); |
| 498 | signal(SIGUSR2, SIG_DFL); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 499 | signal(SIGINT, SIG_DFL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 500 | signal(SIGTERM, SIG_DFL); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 501 | signal(SIGHUP, SIG_DFL); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 502 | signal(SIGCONT, SIG_DFL); |
| 503 | signal(SIGSTOP, SIG_DFL); |
| 504 | signal(SIGTSTP, SIG_DFL); |
Eric Andersen | 2f6c04f | 1999-11-01 23:59:44 +0000 | [diff] [blame] | 505 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 506 | /* Open the new terminal device */ |
| 507 | if ((fd = device_open(a->terminal, O_RDWR|O_NOCTTY)) < 0) { |
| 508 | if (stat(a->terminal, &sb) != 0) { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 509 | message(LOG | CONSOLE, "\rdevice '%s' does not exist.\n", |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 510 | a->terminal); |
| 511 | _exit(1); |
Eric Andersen | 53f5061 | 2001-03-14 09:01:11 +0000 | [diff] [blame] | 512 | } |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 513 | message(LOG | CONSOLE, "\rBummer, can't open %s\n", a->terminal); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 514 | _exit(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 515 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 516 | /* Make sure the terminal will act fairly normal for us */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 517 | set_term(0); |
| 518 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 519 | /* If the init Action requires up to wait, then force the |
| 520 | * supplied terminal to be the controlling tty. */ |
Eric Andersen | c57e42b | 2002-03-29 00:59:44 +0000 | [diff] [blame] | 521 | if (a->action & (SYSINIT|WAIT|CTRLALTDEL|SHUTDOWN|RESTART|ASKFIRST)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 522 | |
| 523 | /* Take over the controlling tty */ |
| 524 | ioctl(fd, TIOCSCTTY, 1); |
| 525 | /* Setup stdin, stdout, stderr for the new process so |
| 526 | * they point to the supplied terminal */ |
| 527 | dup(fd); |
| 528 | dup(fd); |
| 529 | |
| 530 | /* Now fork off another process to just hang around */ |
| 531 | if ((pid = fork()) < 0) { |
| 532 | message(LOG | CONSOLE, "Can't fork!\n"); |
| 533 | _exit(1); |
| 534 | } |
| 535 | |
| 536 | if (pid > 0) { |
| 537 | |
| 538 | /* We are the parent -- wait till the child is done */ |
| 539 | signal(SIGINT, SIG_IGN); |
| 540 | signal(SIGTSTP, SIG_IGN); |
| 541 | signal(SIGQUIT, SIG_IGN); |
| 542 | signal(SIGCHLD, SIG_DFL); |
| 543 | |
| 544 | /* Wait for child to exit */ |
| 545 | while ((tmp_pid = waitpid(pid, &junk, 0)) != pid) { |
| 546 | if (tmp_pid < 0 && errno == ECHILD) |
| 547 | break; |
| 548 | } |
| 549 | |
| 550 | /* See if stealing the controlling tty back is necessary */ |
| 551 | pgrp = tcgetpgrp(tmp_pid); |
| 552 | if (pgrp != getpid()) |
| 553 | _exit(0); |
| 554 | |
| 555 | /* Use a temporary process to steal the controlling tty. */ |
| 556 | if ((pid = fork()) < 0) { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 557 | message(LOG | CONSOLE, "\rCan't fork!\n"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 558 | _exit(1); |
| 559 | } |
| 560 | if (pid == 0) { |
| 561 | setsid(); |
| 562 | ioctl(tmp_pid, TIOCSCTTY, 1); |
| 563 | _exit(0); |
| 564 | } |
| 565 | while((tmp_pid = waitpid(pid, &junk, 0)) != pid) { |
| 566 | if (tmp_pid < 0 && errno == ECHILD) |
| 567 | break; |
| 568 | } |
| 569 | _exit(0); |
| 570 | } |
| 571 | |
| 572 | /* Now fall though to actually execute things */ |
| 573 | } else { |
| 574 | dup(fd); |
| 575 | dup(fd); |
| 576 | } |
| 577 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 578 | /* See if any special /bin/sh requiring characters are present */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 579 | if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 580 | cmd[0] = SHELL; |
| 581 | cmd[1] = "-c"; |
| 582 | strcpy(buf, "exec "); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 583 | safe_strncpy(buf + sizeof("exec "), a->command, |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 584 | sizeof(buf) - sizeof("exec ")); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 585 | cmd[2] = buf; |
| 586 | cmd[3] = NULL; |
| 587 | } else { |
| 588 | /* Convert command (char*) into cmd (char**, one word per string) */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 589 | safe_strncpy(buf, a->command, sizeof(buf)); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 590 | s = buf; |
| 591 | for (tmpCmd = buf, i = 0; |
| 592 | (tmpCmd = strsep(&s, " \t")) != NULL;) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 593 | if (*tmpCmd != '\0') { |
| 594 | cmd[i] = tmpCmd; |
| 595 | tmpCmd++; |
| 596 | i++; |
| 597 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 598 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 599 | cmd[i] = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 600 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 601 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 602 | cmdpath = cmd[0]; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 603 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 604 | /* |
| 605 | Interactive shells want to see a dash in argv[0]. This |
| 606 | typically is handled by login, argv will be setup this |
| 607 | way if a dash appears at the front of the command path |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 608 | (like "-/bin/sh"). |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 609 | */ |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 610 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 611 | if (*cmdpath == '-') { |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 612 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 613 | /* skip over the dash */ |
| 614 | ++cmdpath; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 615 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 616 | /* find the last component in the command pathname */ |
| 617 | s = get_last_path_component(cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 618 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 619 | /* make a new argv[0] */ |
| 620 | if ((cmd[0] = malloc(strlen(s)+2)) == NULL) { |
| 621 | message(LOG | CONSOLE, "malloc failed"); |
| 622 | cmd[0] = cmdpath; |
| 623 | } else { |
| 624 | cmd[0][0] = '-'; |
| 625 | strcpy(cmd[0]+1, s); |
| 626 | } |
| 627 | } |
| 628 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 629 | if (a->action & ASKFIRST) { |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 630 | /* |
| 631 | * Save memory by not exec-ing anything large (like a shell) |
| 632 | * before the user wants it. This is critical if swap is not |
| 633 | * enabled and the system has low memory. Generally this will |
| 634 | * be run on the second virtual console, and the first will |
| 635 | * be allowed to start a shell or whatever an init script |
| 636 | * specifies. |
| 637 | */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 638 | messageND(LOG, "Waiting for enter to start '%s' (pid %d, terminal %s)\n", |
| 639 | cmdpath, getpid(), a->terminal); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 640 | write(fileno(stdout), press_enter, sizeof(press_enter) - 1); |
| 641 | getc(stdin); |
| 642 | } |
| 643 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 644 | /* Log the process name and args */ |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 645 | messageND(LOG, "Starting pid %d, console %s: '%s'\n", |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 646 | getpid(), a->terminal, cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 647 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 648 | #if defined CONFIG_FEATURE_INIT_COREDUMPS |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 649 | if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) { |
| 650 | struct rlimit limit; |
| 651 | limit.rlim_cur = RLIM_INFINITY; |
| 652 | limit.rlim_max = RLIM_INFINITY; |
| 653 | setrlimit(RLIMIT_CORE, &limit); |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 654 | } |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 655 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 656 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 657 | /* Now run it. The new program will take over this PID, |
| 658 | * so nothing further in init.c should be run. */ |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 659 | execve(cmdpath, cmd, environment); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 660 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 661 | /* We're still here? Some error happened. */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 662 | message(LOG | CONSOLE, "\rBummer, could not run '%s': %s\n", cmdpath, |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 663 | strerror(errno)); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 664 | _exit(-1); |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 665 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 666 | sigprocmask(SIG_SETMASK, &omask, NULL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 667 | return pid; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 668 | } |
| 669 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 670 | static int waitfor(struct init_action *a) |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 671 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 672 | int pid; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 673 | int status, wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 674 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 675 | pid = run(a); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 676 | while (1) { |
| 677 | wpid = wait(&status); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 678 | if (wpid > 0 && wpid != pid) { |
| 679 | continue; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 680 | } |
| 681 | if (wpid == pid) |
| 682 | break; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 683 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 684 | return wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 685 | } |
| 686 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 687 | /* Run all commands of a particular type */ |
| 688 | static void run_actions(int action) |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 689 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 690 | struct init_action *a, *tmp; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 691 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 692 | for (a = init_action_list; a; a = tmp) { |
| 693 | tmp = a->next; |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 694 | if (a->action == action) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 695 | if (a->action & (SYSINIT|WAIT|CTRLALTDEL|SHUTDOWN|RESTART)) { |
| 696 | waitfor(a); |
| 697 | delete_init_action(a); |
| 698 | } else if (a->action & ONCE) { |
| 699 | run(a); |
| 700 | delete_init_action(a); |
| 701 | } else if (a->action & (RESPAWN|ASKFIRST)) { |
| 702 | /* Only run stuff with pid==0. If they have |
| 703 | * a pid, that means it is still running */ |
| 704 | if (a->pid == 0) { |
| 705 | a->pid = run(a); |
| 706 | } |
| 707 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 708 | } |
| 709 | } |
| 710 | } |
| 711 | |
| 712 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 713 | #ifndef DEBUG_INIT |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 714 | static void shutdown_system(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 715 | { |
Eric Andersen | 813d88c | 2001-10-28 22:49:48 +0000 | [diff] [blame] | 716 | sigset_t block_signals; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 717 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 718 | /* first disable all our signals */ |
| 719 | sigemptyset(&block_signals); |
| 720 | sigaddset(&block_signals, SIGHUP); |
| 721 | sigaddset(&block_signals, SIGCHLD); |
| 722 | sigaddset(&block_signals, SIGUSR1); |
| 723 | sigaddset(&block_signals, SIGUSR2); |
| 724 | sigaddset(&block_signals, SIGINT); |
| 725 | sigaddset(&block_signals, SIGTERM); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 726 | sigaddset(&block_signals, SIGCONT); |
| 727 | sigaddset(&block_signals, SIGSTOP); |
| 728 | sigaddset(&block_signals, SIGTSTP); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 729 | sigprocmask(SIG_BLOCK, &block_signals, NULL); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 730 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 731 | /* Allow Ctrl-Alt-Del to reboot system. */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 732 | init_reboot(RB_ENABLE_CAD); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 733 | |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 734 | message(CONSOLE|LOG, "\n\rThe system is going down NOW !!\n"); |
Eric Andersen | cf8c9cf | 1999-11-05 00:31:46 +0000 | [diff] [blame] | 735 | sync(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 736 | |
| 737 | /* Send signals to every process _except_ pid 1 */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 738 | message(CONSOLE|LOG, "\rSending SIGTERM to all processes.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 739 | kill(-1, SIGTERM); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 740 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 741 | sync(); |
| 742 | |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 743 | message(CONSOLE|LOG, "\rSending SIGKILL to all processes.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 744 | kill(-1, SIGKILL); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 745 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 746 | |
Matt Kraai | 8fc364e | 2001-04-12 20:12:16 +0000 | [diff] [blame] | 747 | /* run everything to be run at "shutdown" */ |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 748 | run_actions(SHUTDOWN); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 749 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 750 | sync(); |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 751 | if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 752 | /* bdflush, kupdate not needed for kernels >2.2.11 */ |
| 753 | bdflush(1, 0); |
| 754 | sync(); |
| 755 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 756 | } |
| 757 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 758 | static void exec_signal(int sig) |
| 759 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 760 | struct init_action *a, *tmp; |
| 761 | for (a = init_action_list; a; a = tmp) { |
| 762 | tmp = a->next; |
| 763 | if (a->action & RESTART) { |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 764 | shutdown_system(); |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 765 | message(CONSOLE|LOG, "\rTrying to re-exec %s\n", a->command); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 766 | execl(a->command, a->command, NULL); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 767 | |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 768 | message(CONSOLE|LOG, "\rexec of '%s' failed: %s\n", |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 769 | a->command, sys_errlist[errno]); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 770 | sync(); |
| 771 | sleep(2); |
| 772 | init_reboot(RB_HALT_SYSTEM); |
| 773 | loop_forever(); |
| 774 | } |
| 775 | } |
| 776 | } |
| 777 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 778 | static void halt_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 779 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 780 | shutdown_system(); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 781 | message(CONSOLE|LOG, |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 782 | #if #cpu(s390) |
| 783 | /* Seems the s390 console is Wierd(tm). */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 784 | "\rThe system is halted. You may reboot now.\n" |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 785 | #else |
| 786 | /* secondConsole is NULL for a serial console */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 787 | "\rThe system is halted. Press %s or turn off power\n", |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 788 | (secondConsole == NULL)? "Reset" : "CTRL-ALT-DEL" |
| 789 | #endif |
| 790 | ); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 791 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 792 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 793 | /* allow time for last message to reach serial console */ |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 794 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 795 | |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 796 | if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0)) |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 797 | init_reboot(RB_POWER_OFF); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 798 | else |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 799 | init_reboot(RB_HALT_SYSTEM); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 800 | |
| 801 | loop_forever(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 802 | } |
| 803 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 804 | static void reboot_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 805 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 806 | shutdown_system(); |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 807 | message(CONSOLE|LOG, "\rPlease stand by while rebooting the system.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 808 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 809 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 810 | /* allow time for last message to reach serial console */ |
| 811 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 812 | |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 813 | init_reboot(RB_AUTOBOOT); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 814 | |
| 815 | loop_forever(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 816 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 817 | |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 818 | static void ctrlaltdel_signal(int sig) |
| 819 | { |
| 820 | run_actions(CTRLALTDEL); |
| 821 | } |
| 822 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 823 | /* The SIGSTOP & SIGTSTP handler */ |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 824 | static void stop_handler(int sig) |
| 825 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 826 | int saved_errno = errno; |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 827 | |
| 828 | got_cont = 0; |
| 829 | while(!got_cont) pause(); |
| 830 | got_cont = 0; |
| 831 | errno = saved_errno; |
| 832 | } |
| 833 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 834 | /* The SIGCONT handler */ |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 835 | static void cont_handler(int sig) |
| 836 | { |
| 837 | got_cont = 1; |
| 838 | } |
| 839 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 840 | #endif /* ! DEBUG_INIT */ |
Erik Andersen | de55287 | 2000-01-23 01:34:05 +0000 | [diff] [blame] | 841 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 842 | static void new_init_action(int action, char *command, char *cons) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 843 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 844 | struct init_action *new_action, *a; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 845 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 846 | if (*cons == '\0') |
| 847 | cons = console; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 848 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 849 | /* If BusyBox detects that a serial console is in use, then entries |
| 850 | * not refering to the console or null devices will _not_ be run. |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 851 | * The exception to this rule is the null device. |
| 852 | */ |
| 853 | if (secondConsole == NULL && strcmp(cons, console) |
| 854 | && strcmp(cons, "/dev/null")) |
| 855 | return; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 856 | if (strcmp(cons, "/dev/null") == 0 && (action & ASKFIRST)) |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 857 | return; |
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 | new_action = calloc((size_t) (1), sizeof(struct init_action)); |
| 860 | if (!new_action) { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 861 | message(LOG | CONSOLE, "\rMemory allocation failure\n"); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 862 | loop_forever(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 863 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 864 | |
| 865 | /* Append to the end of the list */ |
| 866 | for (a = init_action_list; a && a->next; a = a->next) ; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 867 | if (a) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 868 | a->next = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 869 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 870 | init_action_list = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 871 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 872 | safe_strncpy(new_action->command, command, 255); |
| 873 | new_action->action = action; |
| 874 | safe_strncpy(new_action->terminal, cons, 255); |
| 875 | new_action->pid = 0; |
| 876 | // message(LOG|CONSOLE, "command='%s' action='%d' terminal='%s'\n", |
| 877 | // new_action->command, new_action->action, new_action->terminal); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 878 | } |
| 879 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 880 | static void delete_init_action(struct init_action * action) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 881 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 882 | struct init_action *a, *b = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 883 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 884 | for (a = init_action_list; a; b = a, a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 885 | if (a == action) { |
| 886 | if (b == NULL) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 887 | init_action_list = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 888 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 889 | b->next = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 890 | } |
| 891 | free(a); |
| 892 | break; |
| 893 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 894 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 895 | } |
| 896 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 897 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 898 | * then parse_inittab() simply adds in some default |
Eric Andersen | 77d9268 | 2001-05-23 20:32:09 +0000 | [diff] [blame] | 899 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 900 | * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | 812d466 | 2000-01-07 18:30:40 +0000 | [diff] [blame] | 901 | * _is_ defined, but /etc/inittab is missing, this |
| 902 | * results in the same set of default behaviors. |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 903 | * */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 904 | static void parse_inittab(void) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 905 | { |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 906 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 907 | FILE *file; |
| 908 | char buf[256], lineAsRead[256], tmpConsole[256]; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 909 | char *id, *runlev, *action, *command, *eol; |
| 910 | const struct init_action_type *a = actions; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 911 | int foundIt; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 912 | |
| 913 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 914 | file = fopen(INITTAB, "r"); |
| 915 | if (file == NULL) { |
| 916 | /* No inittab file -- set up some default behavior */ |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 917 | #endif |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 918 | /* Reboot on Ctrl-Alt-Del */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 919 | new_init_action(CTRLALTDEL, "/sbin/reboot", console); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 920 | /* Umount all filesystems on halt/reboot */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 921 | new_init_action(SHUTDOWN, "/bin/umount -a -r", console); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 922 | #if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 923 | /* Swapoff on halt/reboot */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 924 | new_init_action(SHUTDOWN, "/sbin/swapoff -a", console); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 925 | #endif |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 926 | /* Prepare to restart init when a HUP is received */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 927 | new_init_action(RESTART, "/sbin/init", console); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 928 | /* Askfirst shell on tty1 */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 929 | new_init_action(ASKFIRST, LOGIN_SHELL, console); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 930 | /* Askfirst shell on tty2 */ |
| 931 | if (secondConsole != NULL) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 932 | new_init_action(ASKFIRST, LOGIN_SHELL, secondConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 933 | /* Askfirst shell on tty3 */ |
| 934 | if (thirdConsole != NULL) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 935 | new_init_action(ASKFIRST, LOGIN_SHELL, thirdConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 936 | /* Askfirst shell on tty4 */ |
| 937 | if (fourthConsole != NULL) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 938 | new_init_action(ASKFIRST, LOGIN_SHELL, fourthConsole); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 939 | /* sysinit */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 940 | new_init_action(SYSINIT, INIT_SCRIPT, console); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 941 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 942 | return; |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 943 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 944 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 945 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 946 | while (fgets(buf, 255, file) != NULL) { |
| 947 | foundIt = FALSE; |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 948 | /* Skip leading spaces */ |
| 949 | for (id = buf; *id == ' ' || *id == '\t'; id++); |
| 950 | |
| 951 | /* Skip the line if it's a comment */ |
| 952 | if (*id == '#' || *id == '\n') |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 953 | continue; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 954 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 955 | /* Trim the trailing \n */ |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 956 | eol = strrchr(id, '\n'); |
| 957 | if (eol != NULL) |
| 958 | *eol = '\0'; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 959 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 960 | /* Keep a copy around for posterity's sake (and error msgs) */ |
| 961 | strcpy(lineAsRead, buf); |
| 962 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 963 | /* Separate the ID field from the runlevels */ |
| 964 | runlev = strchr(id, ':'); |
| 965 | if (runlev == NULL || *(runlev + 1) == '\0') { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 966 | message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 967 | continue; |
| 968 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 969 | *runlev = '\0'; |
| 970 | ++runlev; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 971 | } |
| 972 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 973 | /* Separate the runlevels from the action */ |
| 974 | action = strchr(runlev, ':'); |
| 975 | if (action == NULL || *(action + 1) == '\0') { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 976 | message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 977 | continue; |
| 978 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 979 | *action = '\0'; |
| 980 | ++action; |
| 981 | } |
| 982 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 983 | /* Separate the action from the command */ |
| 984 | command = strchr(action, ':'); |
| 985 | if (command == NULL || *(command + 1) == '\0') { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 986 | message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 987 | continue; |
| 988 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 989 | *command = '\0'; |
| 990 | ++command; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 991 | } |
| 992 | |
| 993 | /* Ok, now process it */ |
| 994 | a = actions; |
| 995 | while (a->name != 0) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 996 | if (strcmp(a->name, action) == 0) { |
| 997 | if (*id != '\0') { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 998 | strcpy(tmpConsole, "/dev/"); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 999 | strncat(tmpConsole, id, 200); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 1000 | id = tmpConsole; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1001 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1002 | new_init_action(a->action, command, id); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1003 | foundIt = TRUE; |
| 1004 | } |
| 1005 | a++; |
| 1006 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1007 | if (foundIt == TRUE) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1008 | continue; |
| 1009 | else { |
| 1010 | /* Choke on an unknown action */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 1011 | message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1012 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 1013 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1014 | return; |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1015 | #endif /* CONFIG_FEATURE_USE_INITTAB */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 1016 | } |
| 1017 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 1018 | |
| 1019 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 1020 | extern int init_main(int argc, char **argv) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1021 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1022 | struct init_action *a; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1023 | pid_t wpid; |
| 1024 | int status; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1025 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 1026 | if (argc > 1 && !strcmp(argv[1], "-q")) { |
Eric Andersen | 467a18b | 2002-01-25 23:13:06 +0000 | [diff] [blame] | 1027 | /* don't assume init's pid == 1 */ |
| 1028 | long *pid = find_pid_by_name("init"); |
| 1029 | if (!pid || *pid<=0) { |
| 1030 | pid = find_pid_by_name("linuxrc"); |
| 1031 | if (!pid || *pid<=0) |
| 1032 | error_msg_and_die("no process killed"); |
| 1033 | } |
| 1034 | kill(*pid, SIGHUP); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 1035 | exit(0); |
| 1036 | } |
| 1037 | |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 1038 | #ifndef DEBUG_INIT |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 1039 | /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */ |
| 1040 | if (getpid() != 1 |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1041 | #ifdef CONFIG_FEATURE_INITRD |
Matt Kraai | e58771e | 2000-07-12 15:38:49 +0000 | [diff] [blame] | 1042 | && strstr(applet_name, "linuxrc") == NULL |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 1043 | #endif |
| 1044 | ) |
| 1045 | { |
Eric Andersen | 67991cf | 2001-02-14 21:23:06 +0000 | [diff] [blame] | 1046 | show_usage(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1047 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1048 | /* Set up sig handlers -- be sure to |
| 1049 | * clear all of these in run() */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1050 | signal(SIGHUP, exec_signal); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1051 | signal(SIGUSR1, halt_signal); |
Eric Andersen | 4c95a28 | 2000-07-07 19:30:28 +0000 | [diff] [blame] | 1052 | signal(SIGUSR2, halt_signal); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1053 | signal(SIGINT, ctrlaltdel_signal); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1054 | signal(SIGTERM, reboot_signal); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 1055 | signal(SIGCONT, cont_handler); |
| 1056 | signal(SIGSTOP, stop_handler); |
| 1057 | signal(SIGTSTP, stop_handler); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1058 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1059 | /* Turn off rebooting via CTL-ALT-DEL -- we get a |
| 1060 | * SIGINT on CAD so we can shut things down gracefully... */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 1061 | init_reboot(RB_DISABLE_CAD); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1062 | #endif |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 1063 | |
Erik Andersen | 298854f | 2000-03-23 01:09:18 +0000 | [diff] [blame] | 1064 | /* Figure out what kernel this is running */ |
| 1065 | kernelVersion = get_kernel_revision(); |
| 1066 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1067 | /* Close whatever files are open, and reset the console. */ |
| 1068 | close(0); |
| 1069 | close(1); |
| 1070 | close(2); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 1071 | |
| 1072 | /* Figure out where the default console should be */ |
| 1073 | console_init(); |
| 1074 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1075 | set_term(0); |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1076 | chdir("/"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1077 | setsid(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1078 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1079 | /* Make sure PATH is set to something sane */ |
Eric Andersen | 452fd33 | 2001-03-04 06:47:33 +0000 | [diff] [blame] | 1080 | putenv("PATH="_PATH_STDPATH); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1081 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1082 | /* Hello world */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 1083 | message(MAYBE_CONSOLE|LOG, "\rinit started: %s\n", full_version); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1084 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1085 | /* Make sure there is enough memory to do something useful. */ |
| 1086 | check_memory(); |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 1087 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1088 | /* Check if we are supposed to be in single user mode */ |
| 1089 | if (argc > 1 && (!strcmp(argv[1], "single") || |
| 1090 | !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) { |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 1091 | /* Ask first then start a shell on tty2-4 */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1092 | if (secondConsole != NULL) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1093 | new_init_action(ASKFIRST, LOGIN_SHELL, secondConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 1094 | if (thirdConsole != NULL) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1095 | new_init_action(ASKFIRST, LOGIN_SHELL, thirdConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 1096 | if (fourthConsole != NULL) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1097 | new_init_action(ASKFIRST, LOGIN_SHELL, fourthConsole); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1098 | /* Start a shell on tty1 */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1099 | new_init_action(RESPAWN, LOGIN_SHELL, console); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1100 | } else { |
| 1101 | /* Not in single user mode -- see what inittab says */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 1102 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1103 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1104 | * then parse_inittab() simply adds in some default |
Eric Andersen | 77d9268 | 2001-05-23 20:32:09 +0000 | [diff] [blame] | 1105 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1106 | * of "askfirst" shells */ |
| 1107 | parse_inittab(); |
Eric Andersen | d00c262 | 1999-12-07 08:37:31 +0000 | [diff] [blame] | 1108 | } |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1109 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 1110 | /* Make the command line just say "init" -- thats all, nothing else */ |
| 1111 | fixup_argv(argc, argv, "init"); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 1112 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1113 | /* Now run everything that needs to be run */ |
| 1114 | |
| 1115 | /* First run the sysinit command */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1116 | run_actions(SYSINIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1117 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1118 | /* Next run anything that wants to block */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1119 | run_actions(WAIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1120 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1121 | /* Next run anything to be run only once */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1122 | run_actions(ONCE); |
| 1123 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1124 | /* If there is nothing else to do, stop */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1125 | if (init_action_list == NULL) { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 1126 | message(LOG | CONSOLE, "\rNo more tasks for init -- sleeping forever.\n"); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 1127 | loop_forever(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1128 | } |
| 1129 | |
| 1130 | /* Now run the looping stuff for the rest of forever */ |
| 1131 | while (1) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1132 | /* run the respawn stuff */ |
| 1133 | run_actions(RESPAWN); |
| 1134 | |
| 1135 | /* run the askfirst stuff */ |
| 1136 | run_actions(ASKFIRST); |
| 1137 | |
| 1138 | /* Don't consume all CPU time -- sleep a bit */ |
| 1139 | sleep(1); |
| 1140 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1141 | /* Wait for a child process to exit */ |
| 1142 | wpid = wait(&status); |
| 1143 | if (wpid > 0) { |
| 1144 | /* Find out who died and clean up their corpse */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1145 | for (a = init_action_list; a; a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1146 | if (a->pid == wpid) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1147 | /* Set the pid to 0 so that the process gets |
| 1148 | * restarted by run_actions() */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1149 | a->pid = 0; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1150 | message(LOG, "Process '%s' (pid %d) exited. " |
| 1151 | "Scheduling it for restart.\n", a->command, wpid); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1152 | } |
| 1153 | } |
| 1154 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1155 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1156 | } |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 1157 | |
| 1158 | /* |
| 1159 | Local Variables: |
| 1160 | c-file-style: "linux" |
| 1161 | c-basic-offset: 4 |
| 1162 | tab-width: 4 |
| 1163 | End: |
| 1164 | */ |