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 | |
Pavel Roskin | 9c5fcc3 | 2000-07-17 23:45:12 +0000 | [diff] [blame] | 50 | |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 51 | /* From <linux/vt.h> */ |
| 52 | struct vt_stat { |
| 53 | unsigned short v_active; /* active vt */ |
| 54 | unsigned short v_signal; /* signal to send */ |
| 55 | unsigned short v_state; /* vt bitmask */ |
| 56 | }; |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 57 | static const int VT_GETSTATE = 0x5603; /* get global vt state info */ |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 58 | |
| 59 | /* From <linux/serial.h> */ |
| 60 | struct serial_struct { |
| 61 | int type; |
| 62 | int line; |
| 63 | int port; |
| 64 | int irq; |
| 65 | int flags; |
| 66 | int xmit_fifo_size; |
| 67 | int custom_divisor; |
| 68 | int baud_base; |
| 69 | unsigned short close_delay; |
| 70 | char reserved_char[2]; |
| 71 | int hub6; |
| 72 | unsigned short closing_wait; /* time to wait before closing */ |
| 73 | unsigned short closing_wait2; /* no longer used... */ |
| 74 | int reserved[4]; |
| 75 | }; |
| 76 | |
| 77 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 78 | #if (__GNU_LIBRARY__ > 5) || defined(__dietlibc__) |
| 79 | #include <sys/reboot.h> |
| 80 | #define init_reboot(magic) reboot(magic) |
| 81 | #else |
| 82 | #define init_reboot(magic) reboot(0xfee1dead, 672274793, magic) |
| 83 | #endif |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 84 | |
| 85 | #ifndef RB_HALT_SYSTEM |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 86 | static const int RB_HALT_SYSTEM = 0xcdef0123; |
| 87 | static const int RB_ENABLE_CAD = 0x89abcdef; |
| 88 | static const int RB_DISABLE_CAD = 0; |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 89 | #define RB_POWER_OFF 0x4321fedc |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 90 | static const int RB_AUTOBOOT = 0x01234567; |
Eric Andersen | 2f2da90 | 2001-04-09 23:54:15 +0000 | [diff] [blame] | 91 | #endif |
Eric Andersen | b6b519b | 2001-04-09 23:52:18 +0000 | [diff] [blame] | 92 | |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 93 | #ifndef _PATH_STDPATH |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 94 | #define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin" |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 95 | #endif |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 96 | |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 97 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 98 | #if defined CONFIG_FEATURE_INIT_COREDUMPS |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 99 | /* |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 100 | * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called |
| 101 | * before processes are spawned to set core file size as unlimited. |
| 102 | * This is for debugging only. Don't use this is production, unless |
| 103 | * you want core dumps lying about.... |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 104 | */ |
| 105 | #define CORE_ENABLE_FLAG_FILE "/.init_enable_core" |
| 106 | #include <sys/resource.h> |
| 107 | #include <sys/time.h> |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 108 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 109 | |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 110 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 111 | |
Eric Andersen | b6b519b | 2001-04-09 23:52:18 +0000 | [diff] [blame] | 112 | #if __GNU_LIBRARY__ > 5 |
| 113 | #include <sys/kdaemon.h> |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 114 | #else |
Eric Andersen | b6b519b | 2001-04-09 23:52:18 +0000 | [diff] [blame] | 115 | extern int bdflush (int func, long int data); |
| 116 | #endif |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 117 | |
Eric Andersen | 0ecb54a | 1999-12-05 23:24:55 +0000 | [diff] [blame] | 118 | |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 119 | #define SHELL "/bin/sh" /* Default shell */ |
| 120 | #define LOGIN_SHELL "-" SHELL /* Default login shell */ |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 121 | #define INITTAB "/etc/inittab" /* inittab file location */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 122 | #ifndef INIT_SCRIPT |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 123 | #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 124 | #endif |
Erik Andersen | 9c88cac | 1999-12-30 09:25:17 +0000 | [diff] [blame] | 125 | |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 126 | #define MAXENV 16 /* Number of env. vars */ |
| 127 | //static const int MAXENV = 16; /* Number of env. vars */ |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 128 | static const int LOG = 0x1; |
| 129 | static const int CONSOLE = 0x2; |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 130 | #if defined BB_FEATURE_EXTRA_QUIET |
| 131 | static const int MAYBE_CONSOLE = 0x0; |
| 132 | #else |
| 133 | #define MAYBE_CONSOLE CONSOLE |
| 134 | #endif |
| 135 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 136 | |
| 137 | /* Allowed init action types */ |
| 138 | typedef enum { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 139 | SYSINIT = 1, |
| 140 | RESPAWN, |
| 141 | ASKFIRST, |
| 142 | WAIT, |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 143 | ONCE, |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 144 | CTRLALTDEL, |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 145 | SHUTDOWN, |
| 146 | RESTART |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 147 | } initActionEnum; |
| 148 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 149 | /* A mapping between "inittab" action name strings and action type codes. */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 150 | typedef struct initActionType { |
| 151 | const char *name; |
| 152 | initActionEnum action; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 153 | } initActionType; |
| 154 | |
| 155 | static const struct initActionType actions[] = { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 156 | {"sysinit", SYSINIT}, |
| 157 | {"respawn", RESPAWN}, |
| 158 | {"askfirst", ASKFIRST}, |
| 159 | {"wait", WAIT}, |
| 160 | {"once", ONCE}, |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 161 | {"ctrlaltdel", CTRLALTDEL}, |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 162 | {"shutdown", SHUTDOWN}, |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 163 | {"restart", RESTART}, |
Pavel Roskin | 9027bcf | 2000-07-14 15:44:25 +0000 | [diff] [blame] | 164 | {0, 0} |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 165 | }; |
| 166 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 167 | /* Set up a linked list of initActions, to be read from inittab */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 168 | typedef struct initActionTag initAction; |
| 169 | struct initActionTag { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 170 | pid_t pid; |
| 171 | char process[256]; |
| 172 | char console[256]; |
| 173 | initAction *nextPtr; |
| 174 | initActionEnum action; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 175 | }; |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 176 | static initAction *initActionList = NULL; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 177 | |
| 178 | |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 179 | static char *secondConsole = VC_2; |
| 180 | static char *thirdConsole = VC_3; |
| 181 | static char *fourthConsole = VC_4; |
| 182 | static char *log = VC_5; |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 183 | static int kernelVersion = 0; |
| 184 | static char termType[32] = "TERM=linux"; |
| 185 | static char console[32] = _PATH_CONSOLE; |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 186 | sig_atomic_t got_cont = 0; |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 187 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 188 | static void delete_initAction(initAction * action); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 189 | |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 190 | static void loop_forever(void) |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 191 | { |
| 192 | while (1) |
| 193 | sleep (1); |
| 194 | } |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 195 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 196 | /* Print a message to the specified device. |
| 197 | * Device may be bitwise-or'd from LOG | CONSOLE */ |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 198 | #ifdef DEBUG_INIT |
| 199 | static inline messageND(int device, char *fmt, ...) { } |
| 200 | #else |
| 201 | #define messageND message |
| 202 | #endif |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 203 | static void message(int device, char *fmt, ...) |
Erik Andersen | 93d6513 | 2000-04-06 08:06:36 +0000 | [diff] [blame] | 204 | __attribute__ ((format (printf, 2, 3))); |
| 205 | static void message(int device, char *fmt, ...) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 206 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 207 | va_list arguments; |
| 208 | int fd; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 209 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 210 | #ifdef CONFIG_SYSLOGD |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 211 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 212 | /* Log the message to syslogd */ |
| 213 | if (device & LOG) { |
| 214 | char msg[1024]; |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 215 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 216 | va_start(arguments, fmt); |
| 217 | vsnprintf(msg, sizeof(msg), fmt, arguments); |
| 218 | va_end(arguments); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 219 | syslog_msg(LOG_USER, LOG_USER|LOG_INFO, msg); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 220 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 221 | #else |
| 222 | static int log_fd = -1; |
| 223 | |
| 224 | /* Take full control of the log tty, and never close it. |
| 225 | * It's mine, all mine! Muhahahaha! */ |
| 226 | if (log_fd < 0) { |
| 227 | if (log == NULL) { |
| 228 | /* don't even try to log, because there is no such console */ |
| 229 | log_fd = -2; |
| 230 | /* log to main console instead */ |
| 231 | device = CONSOLE; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 232 | } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) { |
| 233 | log_fd = -2; |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 234 | fprintf(stderr, "Bummer, can't write to log on %s!\n", log); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 235 | log = NULL; |
| 236 | device = CONSOLE; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 237 | } |
| 238 | } |
| 239 | if ((device & LOG) && (log_fd >= 0)) { |
| 240 | va_start(arguments, fmt); |
| 241 | vdprintf(log_fd, fmt, arguments); |
| 242 | va_end(arguments); |
| 243 | } |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 244 | #endif |
| 245 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 246 | if (device & CONSOLE) { |
| 247 | /* Always send console messages to /dev/console so people will see them. */ |
| 248 | if ( |
| 249 | (fd = |
| 250 | device_open(_PATH_CONSOLE, |
| 251 | O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) { |
| 252 | va_start(arguments, fmt); |
| 253 | vdprintf(fd, fmt, arguments); |
| 254 | va_end(arguments); |
| 255 | close(fd); |
| 256 | } else { |
| 257 | fprintf(stderr, "Bummer, can't print: "); |
| 258 | va_start(arguments, fmt); |
| 259 | vfprintf(stderr, fmt, arguments); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 260 | va_end(arguments); |
| 261 | } |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 262 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 263 | } |
| 264 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 265 | /* Set terminal settings to reasonable defaults */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 266 | static void set_term(int fd) |
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 | struct termios tty; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 269 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 270 | tcgetattr(fd, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 271 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 272 | /* set control chars */ |
Eric Andersen | 3849f9b | 2000-07-10 19:56:47 +0000 | [diff] [blame] | 273 | tty.c_cc[VINTR] = 3; /* C-c */ |
| 274 | tty.c_cc[VQUIT] = 28; /* C-\ */ |
| 275 | tty.c_cc[VERASE] = 127; /* C-? */ |
| 276 | tty.c_cc[VKILL] = 21; /* C-u */ |
| 277 | tty.c_cc[VEOF] = 4; /* C-d */ |
| 278 | tty.c_cc[VSTART] = 17; /* C-q */ |
| 279 | tty.c_cc[VSTOP] = 19; /* C-s */ |
| 280 | tty.c_cc[VSUSP] = 26; /* C-z */ |
Eric Andersen | 02bc25b | 2000-07-06 21:29:32 +0000 | [diff] [blame] | 281 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 282 | /* use line dicipline 0 */ |
| 283 | tty.c_line = 0; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 284 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 285 | /* Make it be sane */ |
Erik Andersen | 6c41c44 | 2000-03-19 05:13:49 +0000 | [diff] [blame] | 286 | tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD; |
Eric Andersen | d886292 | 2001-04-23 15:14:11 +0000 | [diff] [blame] | 287 | tty.c_cflag |= CREAD|HUPCL|CLOCAL; |
| 288 | |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 289 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 290 | /* input modes */ |
| 291 | tty.c_iflag = ICRNL | IXON | IXOFF; |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 292 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 293 | /* output modes */ |
| 294 | tty.c_oflag = OPOST | ONLCR; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 295 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 296 | /* local modes */ |
| 297 | tty.c_lflag = |
| 298 | ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 299 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 300 | tcsetattr(fd, TCSANOW, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 301 | } |
| 302 | |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 303 | /* How much memory does this machine have? |
| 304 | Units are kBytes to avoid overflow on 4GB machines */ |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 305 | static int check_free_memory(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 306 | { |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 307 | struct sysinfo info; |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 308 | unsigned int result, u, s=10; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 309 | |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 310 | if (sysinfo(&info) != 0) { |
Eric Andersen | 53cfb7e | 2001-01-31 17:29:47 +0000 | [diff] [blame] | 311 | perror_msg("Error checking free memory"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 312 | return -1; |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 313 | } |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 314 | |
| 315 | /* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes. |
| 316 | * Kernels 2.4.0 return info.mem_unit in bytes. */ |
| 317 | u = info.mem_unit; |
| 318 | if (u==0) u=1; |
| 319 | while ( (u&1) == 0 && s > 0 ) { u>>=1; s--; } |
| 320 | result = (info.totalram>>s) + (info.totalswap>>s); |
| 321 | result = result*u; |
| 322 | if (result < 0) result = INT_MAX; |
| 323 | return result; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 324 | } |
| 325 | |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 326 | static void console_init(void) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 327 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 328 | int fd; |
| 329 | int tried_devcons = 0; |
| 330 | int tried_vtprimary = 0; |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 331 | struct vt_stat vt; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 332 | struct serial_struct sr; |
| 333 | char *s; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 334 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 335 | if ((s = getenv("TERM")) != NULL) { |
| 336 | snprintf(termType, sizeof(termType) - 1, "TERM=%s", s); |
| 337 | } |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 338 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 339 | if ((s = getenv("CONSOLE")) != NULL) { |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 340 | safe_strncpy(console, s, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 341 | } |
Eric Andersen | fbb39c8 | 1999-11-08 17:00:52 +0000 | [diff] [blame] | 342 | #if #cpu(sparc) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 343 | /* sparc kernel supports console=tty[ab] parameter which is also |
| 344 | * passed to init, so catch it here */ |
| 345 | else if ((s = getenv("console")) != NULL) { |
| 346 | /* remap tty[ab] to /dev/ttyS[01] */ |
| 347 | if (strcmp(s, "ttya") == 0) |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 348 | safe_strncpy(console, SC_0, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 349 | else if (strcmp(s, "ttyb") == 0) |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 350 | safe_strncpy(console, SC_1, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 351 | } |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 352 | #endif |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 353 | else { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 354 | /* 2.2 kernels: identify the real console backend and try to use it */ |
| 355 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
| 356 | /* this is a serial console */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 357 | snprintf(console, sizeof(console) - 1, SC_FORMAT, sr.line); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 358 | } else if (ioctl(0, VT_GETSTATE, &vt) == 0) { |
| 359 | /* this is linux virtual tty */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 360 | snprintf(console, sizeof(console) - 1, VC_FORMAT, vt.v_active); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 361 | } else { |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 362 | safe_strncpy(console, _PATH_CONSOLE, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 363 | tried_devcons++; |
| 364 | } |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 365 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 366 | |
| 367 | while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) { |
| 368 | /* Can't open selected console -- try /dev/console */ |
| 369 | if (!tried_devcons) { |
| 370 | tried_devcons++; |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 371 | safe_strncpy(console, _PATH_CONSOLE, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 372 | continue; |
| 373 | } |
| 374 | /* Can't open selected console -- try vt1 */ |
| 375 | if (!tried_vtprimary) { |
| 376 | tried_vtprimary++; |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 377 | safe_strncpy(console, VC_1, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 378 | continue; |
| 379 | } |
| 380 | break; |
| 381 | } |
| 382 | if (fd < 0) { |
| 383 | /* Perhaps we should panic here? */ |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 384 | safe_strncpy(console, "/dev/null", sizeof(console)); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 385 | } else { |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 386 | /* check for serial console and disable logging to tty5 & running a |
| 387 | * shell to tty2-4 */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 388 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 389 | log = NULL; |
| 390 | secondConsole = NULL; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 391 | thirdConsole = NULL; |
| 392 | fourthConsole = NULL; |
Erik Andersen | fa4718e | 2000-02-21 19:25:12 +0000 | [diff] [blame] | 393 | /* Force the TERM setting to vt102 for serial console -- |
| 394 | * iff TERM is set to linux (the default) */ |
| 395 | if (strcmp( termType, "TERM=linux" ) == 0) |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 396 | safe_strncpy(termType, "TERM=vt102", sizeof(termType)); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 397 | message(LOG | CONSOLE, |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 398 | "serial console detected. Disabling virtual terminals.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 399 | } |
| 400 | close(fd); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 401 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 402 | message(LOG, "console=%s\n", console); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 403 | } |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 404 | |
| 405 | static void fixup_argv(int argc, char **argv, char *new_argv0) |
| 406 | { |
| 407 | int len; |
| 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 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 421 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 422 | static pid_t run(char *command, char *terminal, int get_enter) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 423 | { |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 424 | int i, j; |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 425 | int fd; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 426 | pid_t pid; |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 427 | char *tmpCmd, *s; |
| 428 | char *cmd[255], *cmdpath; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 429 | char buf[255]; |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 430 | struct stat sb; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 431 | static const char press_enter[] = |
| 432 | |
Eric Andersen | 3862423 | 2001-01-25 00:04:16 +0000 | [diff] [blame] | 433 | #ifdef CUSTOMIZED_BANNER |
| 434 | #include CUSTOMIZED_BANNER |
| 435 | #endif |
| 436 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 437 | "\nPlease press Enter to activate this console. "; |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 438 | char *environment[MAXENV+1] = { |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 439 | termType, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 440 | "HOME=/", |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 441 | "PATH=" _PATH_STDPATH, |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 442 | "SHELL=" SHELL, |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 443 | "USER=root", |
| 444 | NULL |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 445 | }; |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 446 | |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 447 | /* inherit environment to the child, merging our values -andy */ |
| 448 | for (i=0; environ[i]; i++) { |
| 449 | for (j=0; environment[j]; j++) { |
| 450 | s = strchr(environment[j], '='); |
| 451 | if (!strncmp(environ[i], environment[j], s - environment[j])) |
| 452 | break; |
| 453 | } |
| 454 | if (!environment[j]) { |
| 455 | environment[j++] = environ[i]; |
| 456 | environment[j] = NULL; |
| 457 | } |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 458 | } |
| 459 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 460 | #if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) |
| 461 | if ((pid = fork()) == 0) |
| 462 | #else |
| 463 | if ((pid = vfork()) == 0) |
| 464 | #endif |
| 465 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 466 | /* Clean up */ |
Eric Andersen | fb6a508 | 2000-09-13 16:15:29 +0000 | [diff] [blame] | 467 | ioctl(0, TIOCNOTTY, 0); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 468 | close(0); |
| 469 | close(1); |
| 470 | close(2); |
| 471 | setsid(); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 472 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 473 | /* Reset signal handlers set for parent process */ |
| 474 | signal(SIGUSR1, SIG_DFL); |
| 475 | signal(SIGUSR2, SIG_DFL); |
| 476 | signal(SIGINT, SIG_DFL); |
| 477 | signal(SIGTERM, SIG_DFL); |
| 478 | signal(SIGHUP, SIG_DFL); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 479 | signal(SIGCONT, SIG_DFL); |
| 480 | signal(SIGSTOP, SIG_DFL); |
| 481 | signal(SIGTSTP, SIG_DFL); |
Eric Andersen | 2f6c04f | 1999-11-01 23:59:44 +0000 | [diff] [blame] | 482 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 483 | if ((fd = device_open(terminal, O_RDWR)) < 0) { |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 484 | if (stat(terminal, &sb) != 0) { |
Eric Andersen | 53f5061 | 2001-03-14 09:01:11 +0000 | [diff] [blame] | 485 | message(LOG | CONSOLE, "device '%s' does not exist.\n", |
| 486 | terminal); |
| 487 | exit(1); |
| 488 | } |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 489 | message(LOG | CONSOLE, "Bummer, can't open %s\n", terminal); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 490 | exit(1); |
| 491 | } |
| 492 | dup2(fd, 0); |
| 493 | dup2(fd, 1); |
| 494 | dup2(fd, 2); |
Eric Andersen | fb6a508 | 2000-09-13 16:15:29 +0000 | [diff] [blame] | 495 | ioctl(0, TIOCSCTTY, 1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 496 | tcsetpgrp(0, getpgrp()); |
| 497 | set_term(0); |
| 498 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 499 | /* See if any special /bin/sh requiring characters are present */ |
| 500 | if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { |
| 501 | cmd[0] = SHELL; |
| 502 | cmd[1] = "-c"; |
| 503 | strcpy(buf, "exec "); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 504 | safe_strncpy(buf + sizeof("exec "), command, |
| 505 | sizeof(buf) - sizeof("exec ")); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 506 | cmd[2] = buf; |
| 507 | cmd[3] = NULL; |
| 508 | } else { |
| 509 | /* Convert command (char*) into cmd (char**, one word per string) */ |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 510 | safe_strncpy(buf, command, sizeof(buf)); |
| 511 | s = buf; |
| 512 | for (tmpCmd = buf, i = 0; |
| 513 | (tmpCmd = strsep(&s, " \t")) != NULL;) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 514 | if (*tmpCmd != '\0') { |
| 515 | cmd[i] = tmpCmd; |
| 516 | tmpCmd++; |
| 517 | i++; |
| 518 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 519 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 520 | cmd[i] = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 521 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 522 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 523 | cmdpath = cmd[0]; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 524 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 525 | /* |
| 526 | Interactive shells want to see a dash in argv[0]. This |
| 527 | typically is handled by login, argv will be setup this |
| 528 | way if a dash appears at the front of the command path |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 529 | (like "-/bin/sh"). |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 530 | */ |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 531 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 532 | if (*cmdpath == '-') { |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 533 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 534 | /* skip over the dash */ |
| 535 | ++cmdpath; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 536 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 537 | /* find the last component in the command pathname */ |
| 538 | s = get_last_path_component(cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 539 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 540 | /* make a new argv[0] */ |
| 541 | if ((cmd[0] = malloc(strlen(s)+2)) == NULL) { |
| 542 | message(LOG | CONSOLE, "malloc failed"); |
| 543 | cmd[0] = cmdpath; |
| 544 | } else { |
| 545 | cmd[0][0] = '-'; |
| 546 | strcpy(cmd[0]+1, s); |
| 547 | } |
| 548 | } |
| 549 | |
Matt Kraai | 1f0c436 | 2001-12-20 23:13:26 +0000 | [diff] [blame^] | 550 | if (get_enter) { |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 551 | /* |
| 552 | * Save memory by not exec-ing anything large (like a shell) |
| 553 | * before the user wants it. This is critical if swap is not |
| 554 | * enabled and the system has low memory. Generally this will |
| 555 | * be run on the second virtual console, and the first will |
| 556 | * be allowed to start a shell or whatever an init script |
| 557 | * specifies. |
| 558 | */ |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 559 | messageND(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\n", |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 560 | cmd[0], getpid(), terminal); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 561 | write(fileno(stdout), press_enter, sizeof(press_enter) - 1); |
| 562 | getc(stdin); |
| 563 | } |
| 564 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 565 | /* Log the process name and args */ |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 566 | messageND(LOG, "Starting pid %d, console %s: '%s'\n", |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 567 | getpid(), terminal, command); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 568 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 569 | #if defined CONFIG_FEATURE_INIT_COREDUMPS |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 570 | if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) { |
| 571 | struct rlimit limit; |
| 572 | limit.rlim_cur = RLIM_INFINITY; |
| 573 | limit.rlim_max = RLIM_INFINITY; |
| 574 | setrlimit(RLIMIT_CORE, &limit); |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 575 | } |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 576 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 577 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 578 | /* Now run it. The new program will take over this PID, |
| 579 | * so nothing further in init.c should be run. */ |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 580 | execve(cmdpath, cmd, environment); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 581 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 582 | /* We're still here? Some error happened. */ |
| 583 | message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath, |
| 584 | strerror(errno)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 585 | exit(-1); |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 586 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 587 | return pid; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 588 | } |
| 589 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 590 | static int waitfor(char *command, char *terminal, int get_enter) |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 591 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 592 | int status, wpid; |
| 593 | int pid = run(command, terminal, get_enter); |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 594 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 595 | while (1) { |
| 596 | wpid = wait(&status); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 597 | if (wpid > 0 && wpid != pid) { |
| 598 | continue; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 599 | } |
| 600 | if (wpid == pid) |
| 601 | break; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 602 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 603 | return wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 604 | } |
| 605 | |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 606 | /* Make sure there is enough memory to do something useful. * |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 607 | * Calls "swapon -a" if needed so be sure /etc/fstab is present... */ |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 608 | static void check_memory(void) |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 609 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 610 | struct stat statBuf; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 611 | |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 612 | if (check_free_memory() > 1000) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 613 | return; |
| 614 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 615 | #if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 616 | if (stat("/etc/fstab", &statBuf) == 0) { |
Erik Andersen | 61677fe | 2000-04-13 01:18:56 +0000 | [diff] [blame] | 617 | /* swapon -a requires /proc typically */ |
| 618 | waitfor("mount proc /proc -t proc", console, FALSE); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 619 | /* Try to turn on swap */ |
Erik Andersen | 61677fe | 2000-04-13 01:18:56 +0000 | [diff] [blame] | 620 | waitfor("swapon -a", console, FALSE); |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 621 | if (check_free_memory() < 1000) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 622 | goto goodnight; |
| 623 | } else |
| 624 | goto goodnight; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 625 | return; |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 626 | #endif |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 627 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 628 | goodnight: |
| 629 | message(CONSOLE, |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 630 | "Sorry, your computer does not have enough memory.\n"); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 631 | loop_forever(); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 632 | } |
| 633 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 634 | /* Run all commands to be run right before halt/reboot */ |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 635 | static void run_actions(initActionEnum action) |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 636 | { |
Eric Andersen | 0d4e51d | 2001-03-15 19:18:21 +0000 | [diff] [blame] | 637 | initAction *a, *tmp; |
Eric Andersen | a4edd0e | 2001-03-15 21:04:18 +0000 | [diff] [blame] | 638 | for (a = initActionList; a; a = tmp) { |
| 639 | tmp = a->nextPtr; |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 640 | if (a->action == action) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 641 | waitfor(a->process, a->console, FALSE); |
| 642 | delete_initAction(a); |
| 643 | } |
| 644 | } |
| 645 | } |
| 646 | |
| 647 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 648 | #ifndef DEBUG_INIT |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 649 | static void shutdown_system(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 650 | { |
Eric Andersen | 813d88c | 2001-10-28 22:49:48 +0000 | [diff] [blame] | 651 | sigset_t block_signals; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 652 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 653 | /* first disable all our signals */ |
| 654 | sigemptyset(&block_signals); |
| 655 | sigaddset(&block_signals, SIGHUP); |
| 656 | sigaddset(&block_signals, SIGCHLD); |
| 657 | sigaddset(&block_signals, SIGUSR1); |
| 658 | sigaddset(&block_signals, SIGUSR2); |
| 659 | sigaddset(&block_signals, SIGINT); |
| 660 | sigaddset(&block_signals, SIGTERM); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 661 | sigaddset(&block_signals, SIGCONT); |
| 662 | sigaddset(&block_signals, SIGSTOP); |
| 663 | sigaddset(&block_signals, SIGTSTP); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 664 | sigprocmask(SIG_BLOCK, &block_signals, NULL); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 665 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 666 | /* Allow Ctrl-Alt-Del to reboot system. */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 667 | init_reboot(RB_ENABLE_CAD); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 668 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 669 | message(CONSOLE|LOG, "\nThe system is going down NOW !!\n"); |
Eric Andersen | cf8c9cf | 1999-11-05 00:31:46 +0000 | [diff] [blame] | 670 | sync(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 671 | |
| 672 | /* Send signals to every process _except_ pid 1 */ |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 673 | message(CONSOLE|LOG, "Sending SIGTERM to all processes.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 674 | kill(-1, SIGTERM); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 675 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 676 | sync(); |
| 677 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 678 | message(CONSOLE|LOG, "Sending SIGKILL to all processes.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 679 | kill(-1, SIGKILL); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 680 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 681 | |
Matt Kraai | 8fc364e | 2001-04-12 20:12:16 +0000 | [diff] [blame] | 682 | /* run everything to be run at "shutdown" */ |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 683 | run_actions(SHUTDOWN); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 684 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 685 | sync(); |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 686 | if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 687 | /* bdflush, kupdate not needed for kernels >2.2.11 */ |
| 688 | bdflush(1, 0); |
| 689 | sync(); |
| 690 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 691 | } |
| 692 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 693 | static void exec_signal(int sig) |
| 694 | { |
| 695 | initAction *a, *tmp; |
| 696 | for (a = initActionList; a; a = tmp) { |
| 697 | tmp = a->nextPtr; |
| 698 | if (a->action == RESTART) { |
| 699 | shutdown_system(); |
| 700 | message(CONSOLE|LOG, "Trying to re-exec %s\n", a->process); |
| 701 | execl(a->process, a->process, NULL); |
| 702 | |
| 703 | message(CONSOLE|LOG, "execl of %s failed: %s\n", |
| 704 | a->process, sys_errlist[errno]); |
| 705 | sync(); |
| 706 | sleep(2); |
| 707 | init_reboot(RB_HALT_SYSTEM); |
| 708 | loop_forever(); |
| 709 | } |
| 710 | } |
| 711 | } |
| 712 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 713 | static void halt_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 714 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 715 | shutdown_system(); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 716 | message(CONSOLE|LOG, |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 717 | #if #cpu(s390) |
| 718 | /* Seems the s390 console is Wierd(tm). */ |
Eric Andersen | 2480e3a | 2001-11-21 09:05:31 +0000 | [diff] [blame] | 719 | "The system is halted. You may reboot now.\n" |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 720 | #else |
| 721 | /* secondConsole is NULL for a serial console */ |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 722 | "The system is halted. Press %s or turn off power\n", |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 723 | (secondConsole == NULL)? "Reset" : "CTRL-ALT-DEL" |
| 724 | #endif |
| 725 | ); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 726 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 727 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 728 | /* allow time for last message to reach serial console */ |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 729 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 730 | |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 731 | if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0)) |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 732 | init_reboot(RB_POWER_OFF); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 733 | else |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 734 | init_reboot(RB_HALT_SYSTEM); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 735 | |
| 736 | loop_forever(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 737 | } |
| 738 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 739 | static void reboot_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 740 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 741 | shutdown_system(); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 742 | message(CONSOLE|LOG, "Please stand by while rebooting the system.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 743 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 744 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 745 | /* allow time for last message to reach serial console */ |
| 746 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 747 | |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 748 | init_reboot(RB_AUTOBOOT); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 749 | |
| 750 | loop_forever(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 751 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 752 | |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 753 | static void ctrlaltdel_signal(int sig) |
| 754 | { |
| 755 | run_actions(CTRLALTDEL); |
| 756 | } |
| 757 | |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 758 | /* |
| 759 | * The SIGSTOP & SIGTSTP handler |
| 760 | */ |
| 761 | static void stop_handler(int sig) |
| 762 | { |
| 763 | int saved_errno = errno; |
| 764 | |
| 765 | got_cont = 0; |
| 766 | while(!got_cont) pause(); |
| 767 | got_cont = 0; |
| 768 | errno = saved_errno; |
| 769 | } |
| 770 | |
| 771 | /* |
| 772 | * The SIGCONT handler |
| 773 | */ |
| 774 | static void cont_handler(int sig) |
| 775 | { |
| 776 | got_cont = 1; |
| 777 | } |
| 778 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 779 | #endif /* ! DEBUG_INIT */ |
Erik Andersen | de55287 | 2000-01-23 01:34:05 +0000 | [diff] [blame] | 780 | |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 781 | static void new_initAction(initActionEnum action, char *process, char *cons) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 782 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 783 | initAction *newAction; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 784 | initAction *a; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 785 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 786 | if (*cons == '\0') |
| 787 | cons = console; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 788 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 789 | /* If BusyBox detects that a serial console is in use, |
| 790 | * then entries not refering to the console or null devices will _not_ be run. |
| 791 | * The exception to this rule is the null device. |
| 792 | */ |
| 793 | if (secondConsole == NULL && strcmp(cons, console) |
| 794 | && strcmp(cons, "/dev/null")) |
| 795 | return; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 796 | if (strcmp(cons, "/dev/null") == 0 && action == ASKFIRST) |
| 797 | return; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 798 | |
| 799 | newAction = calloc((size_t) (1), sizeof(initAction)); |
| 800 | if (!newAction) { |
| 801 | message(LOG | CONSOLE, "Memory allocation failure\n"); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 802 | loop_forever(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 803 | } |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 804 | for (a = initActionList; a && a->nextPtr; a = a->nextPtr) ; |
| 805 | if (a) { |
| 806 | a->nextPtr = newAction; |
| 807 | } else { |
| 808 | initActionList = newAction; |
| 809 | } |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 810 | safe_strncpy(newAction->process, process, 255); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 811 | newAction->action = action; |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 812 | safe_strncpy(newAction->console, cons, 255); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 813 | newAction->pid = 0; |
Erik Andersen | 3163821 | 2000-01-15 22:28:50 +0000 | [diff] [blame] | 814 | // message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n", |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 815 | // newAction->process, newAction->action, newAction->console); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 816 | } |
| 817 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 818 | static void delete_initAction(initAction * action) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 819 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 820 | initAction *a, *b = NULL; |
| 821 | |
| 822 | for (a = initActionList; a; b = a, a = a->nextPtr) { |
| 823 | if (a == action) { |
| 824 | if (b == NULL) { |
| 825 | initActionList = a->nextPtr; |
| 826 | } else { |
| 827 | b->nextPtr = a->nextPtr; |
| 828 | } |
| 829 | free(a); |
| 830 | break; |
| 831 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 832 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 833 | } |
| 834 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 835 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 836 | * then parse_inittab() simply adds in some default |
Eric Andersen | 77d9268 | 2001-05-23 20:32:09 +0000 | [diff] [blame] | 837 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 838 | * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | 812d466 | 2000-01-07 18:30:40 +0000 | [diff] [blame] | 839 | * _is_ defined, but /etc/inittab is missing, this |
| 840 | * results in the same set of default behaviors. |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 841 | * */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 842 | static void parse_inittab(void) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 843 | { |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 844 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 845 | FILE *file; |
| 846 | char buf[256], lineAsRead[256], tmpConsole[256]; |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 847 | char *id, *runlev, *action, *process, *eol; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 848 | const struct initActionType *a = actions; |
| 849 | int foundIt; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 850 | |
| 851 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 852 | file = fopen(INITTAB, "r"); |
| 853 | if (file == NULL) { |
| 854 | /* No inittab file -- set up some default behavior */ |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 855 | #endif |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 856 | /* Reboot on Ctrl-Alt-Del */ |
| 857 | new_initAction(CTRLALTDEL, "/sbin/reboot", console); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 858 | /* Umount all filesystems on halt/reboot */ |
| 859 | new_initAction(SHUTDOWN, "/bin/umount -a -r", console); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 860 | #if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 861 | /* Swapoff on halt/reboot */ |
| 862 | new_initAction(SHUTDOWN, "/sbin/swapoff -a", console); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 863 | #endif |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 864 | /* Prepare to restart init when a HUP is received */ |
| 865 | new_initAction(RESTART, "/sbin/init", console); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 866 | /* Askfirst shell on tty1 */ |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 867 | new_initAction(ASKFIRST, LOGIN_SHELL, console); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 868 | /* Askfirst shell on tty2 */ |
| 869 | if (secondConsole != NULL) |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 870 | new_initAction(ASKFIRST, LOGIN_SHELL, secondConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 871 | /* Askfirst shell on tty3 */ |
| 872 | if (thirdConsole != NULL) |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 873 | new_initAction(ASKFIRST, LOGIN_SHELL, thirdConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 874 | /* Askfirst shell on tty4 */ |
| 875 | if (fourthConsole != NULL) |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 876 | new_initAction(ASKFIRST, LOGIN_SHELL, fourthConsole); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 877 | /* sysinit */ |
| 878 | new_initAction(SYSINIT, INIT_SCRIPT, console); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 879 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 880 | return; |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 881 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 882 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 883 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 884 | while (fgets(buf, 255, file) != NULL) { |
| 885 | foundIt = FALSE; |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 886 | /* Skip leading spaces */ |
| 887 | for (id = buf; *id == ' ' || *id == '\t'; id++); |
| 888 | |
| 889 | /* Skip the line if it's a comment */ |
| 890 | if (*id == '#' || *id == '\n') |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 891 | continue; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 892 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 893 | /* Trim the trailing \n */ |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 894 | eol = strrchr(id, '\n'); |
| 895 | if (eol != NULL) |
| 896 | *eol = '\0'; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 897 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 898 | /* Keep a copy around for posterity's sake (and error msgs) */ |
| 899 | strcpy(lineAsRead, buf); |
| 900 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 901 | /* Separate the ID field from the runlevels */ |
| 902 | runlev = strchr(id, ':'); |
| 903 | if (runlev == NULL || *(runlev + 1) == '\0') { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 904 | message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead); |
| 905 | continue; |
| 906 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 907 | *runlev = '\0'; |
| 908 | ++runlev; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 909 | } |
| 910 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 911 | /* Separate the runlevels from the action */ |
| 912 | action = strchr(runlev, ':'); |
| 913 | if (action == NULL || *(action + 1) == '\0') { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 914 | message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead); |
| 915 | continue; |
| 916 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 917 | *action = '\0'; |
| 918 | ++action; |
| 919 | } |
| 920 | |
| 921 | /* Separate the action from the process */ |
| 922 | process = strchr(action, ':'); |
| 923 | if (process == NULL || *(process + 1) == '\0') { |
| 924 | message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead); |
| 925 | continue; |
| 926 | } else { |
| 927 | *process = '\0'; |
| 928 | ++process; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 929 | } |
| 930 | |
| 931 | /* Ok, now process it */ |
| 932 | a = actions; |
| 933 | while (a->name != 0) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 934 | if (strcmp(a->name, action) == 0) { |
| 935 | if (*id != '\0') { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 936 | strcpy(tmpConsole, "/dev/"); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 937 | strncat(tmpConsole, id, 200); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 938 | id = tmpConsole; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 939 | } |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 940 | new_initAction(a->action, process, id); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 941 | foundIt = TRUE; |
| 942 | } |
| 943 | a++; |
| 944 | } |
Matt Kraai | 1f0c436 | 2001-12-20 23:13:26 +0000 | [diff] [blame^] | 945 | if (foundIt) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 946 | continue; |
| 947 | else { |
| 948 | /* Choke on an unknown action */ |
| 949 | message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead); |
| 950 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 951 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 952 | return; |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 953 | #endif /* CONFIG_FEATURE_USE_INITTAB */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 954 | } |
| 955 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 956 | |
| 957 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 958 | extern int init_main(int argc, char **argv) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 959 | { |
Eric Andersen | 0d4e51d | 2001-03-15 19:18:21 +0000 | [diff] [blame] | 960 | initAction *a, *tmp; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 961 | pid_t wpid; |
| 962 | int status; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 963 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 964 | |
| 965 | if (argc > 1 && !strcmp(argv[1], "-q")) { |
| 966 | kill(1, SIGHUP); |
| 967 | exit(0); |
| 968 | } |
| 969 | |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 970 | #ifndef DEBUG_INIT |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 971 | /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */ |
| 972 | if (getpid() != 1 |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 973 | #ifdef CONFIG_FEATURE_INITRD |
Matt Kraai | e58771e | 2000-07-12 15:38:49 +0000 | [diff] [blame] | 974 | && strstr(applet_name, "linuxrc") == NULL |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 975 | #endif |
| 976 | ) |
| 977 | { |
Eric Andersen | 67991cf | 2001-02-14 21:23:06 +0000 | [diff] [blame] | 978 | show_usage(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 979 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 980 | /* Set up sig handlers -- be sure to |
| 981 | * clear all of these in run() */ |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 982 | signal(SIGHUP, exec_signal); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 983 | signal(SIGUSR1, halt_signal); |
Eric Andersen | 4c95a28 | 2000-07-07 19:30:28 +0000 | [diff] [blame] | 984 | signal(SIGUSR2, halt_signal); |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 985 | signal(SIGINT, ctrlaltdel_signal); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 986 | signal(SIGTERM, reboot_signal); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 987 | signal(SIGCONT, cont_handler); |
| 988 | signal(SIGSTOP, stop_handler); |
| 989 | signal(SIGTSTP, stop_handler); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 990 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 991 | /* Turn off rebooting via CTL-ALT-DEL -- we get a |
| 992 | * SIGINT on CAD so we can shut things down gracefully... */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 993 | init_reboot(RB_DISABLE_CAD); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 994 | #endif |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 995 | |
Erik Andersen | 298854f | 2000-03-23 01:09:18 +0000 | [diff] [blame] | 996 | /* Figure out what kernel this is running */ |
| 997 | kernelVersion = get_kernel_revision(); |
| 998 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 999 | /* Close whatever files are open, and reset the console. */ |
| 1000 | close(0); |
| 1001 | close(1); |
| 1002 | close(2); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 1003 | |
| 1004 | /* Figure out where the default console should be */ |
| 1005 | console_init(); |
| 1006 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1007 | set_term(0); |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1008 | chdir("/"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1009 | setsid(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1010 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1011 | /* Make sure PATH is set to something sane */ |
Eric Andersen | 452fd33 | 2001-03-04 06:47:33 +0000 | [diff] [blame] | 1012 | putenv("PATH="_PATH_STDPATH); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1013 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1014 | /* Hello world */ |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 1015 | message(MAYBE_CONSOLE|LOG, "init started: %s\n", full_version); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1016 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1017 | /* Make sure there is enough memory to do something useful. */ |
| 1018 | check_memory(); |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 1019 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1020 | /* Check if we are supposed to be in single user mode */ |
| 1021 | if (argc > 1 && (!strcmp(argv[1], "single") || |
| 1022 | !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) { |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 1023 | /* Ask first then start a shell on tty2-4 */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1024 | if (secondConsole != NULL) |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 1025 | new_initAction(ASKFIRST, LOGIN_SHELL, secondConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 1026 | if (thirdConsole != NULL) |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 1027 | new_initAction(ASKFIRST, LOGIN_SHELL, thirdConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 1028 | if (fourthConsole != NULL) |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 1029 | new_initAction(ASKFIRST, LOGIN_SHELL, fourthConsole); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1030 | /* Start a shell on tty1 */ |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 1031 | new_initAction(RESPAWN, LOGIN_SHELL, console); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1032 | } else { |
| 1033 | /* Not in single user mode -- see what inittab says */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 1034 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1035 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1036 | * then parse_inittab() simply adds in some default |
Eric Andersen | 77d9268 | 2001-05-23 20:32:09 +0000 | [diff] [blame] | 1037 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1038 | * of "askfirst" shells */ |
| 1039 | parse_inittab(); |
Eric Andersen | d00c262 | 1999-12-07 08:37:31 +0000 | [diff] [blame] | 1040 | } |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1041 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 1042 | /* Make the command line just say "init" -- thats all, nothing else */ |
| 1043 | fixup_argv(argc, argv, "init"); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 1044 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1045 | /* Now run everything that needs to be run */ |
| 1046 | |
| 1047 | /* First run the sysinit command */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1048 | run_actions(SYSINIT); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1049 | /* Next run anything that wants to block */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1050 | run_actions(WAIT); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1051 | /* Next run anything to be run only once */ |
Eric Andersen | a4edd0e | 2001-03-15 21:04:18 +0000 | [diff] [blame] | 1052 | for (a = initActionList; a; a = tmp) { |
| 1053 | tmp = a->nextPtr; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1054 | if (a->action == ONCE) { |
| 1055 | run(a->process, a->console, FALSE); |
| 1056 | /* Now remove the "once" entry from the list */ |
| 1057 | delete_initAction(a); |
| 1058 | } |
| 1059 | } |
| 1060 | /* If there is nothing else to do, stop */ |
| 1061 | if (initActionList == NULL) { |
| 1062 | message(LOG | CONSOLE, |
| 1063 | "No more tasks for init -- sleeping forever.\n"); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 1064 | loop_forever(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1065 | } |
| 1066 | |
| 1067 | /* Now run the looping stuff for the rest of forever */ |
| 1068 | while (1) { |
| 1069 | for (a = initActionList; a; a = a->nextPtr) { |
| 1070 | /* Only run stuff with pid==0. If they have |
| 1071 | * a pid, that means they are still running */ |
| 1072 | if (a->pid == 0) { |
| 1073 | switch (a->action) { |
| 1074 | case RESPAWN: |
| 1075 | /* run the respawn stuff */ |
| 1076 | a->pid = run(a->process, a->console, FALSE); |
| 1077 | break; |
| 1078 | case ASKFIRST: |
| 1079 | /* run the askfirst stuff */ |
| 1080 | a->pid = run(a->process, a->console, TRUE); |
| 1081 | break; |
| 1082 | /* silence the compiler's incessant whining */ |
| 1083 | default: |
| 1084 | break; |
| 1085 | } |
| 1086 | } |
| 1087 | } |
| 1088 | /* Wait for a child process to exit */ |
| 1089 | wpid = wait(&status); |
| 1090 | if (wpid > 0) { |
| 1091 | /* Find out who died and clean up their corpse */ |
| 1092 | for (a = initActionList; a; a = a->nextPtr) { |
| 1093 | if (a->pid == wpid) { |
| 1094 | a->pid = 0; |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 1095 | message(LOG, "Process '%s' (pid %d) exited. Scheduling it for restart.\n", |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1096 | a->process, wpid); |
| 1097 | } |
| 1098 | } |
| 1099 | } |
| 1100 | sleep(1); |
| 1101 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1102 | } |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 1103 | |
| 1104 | /* |
| 1105 | Local Variables: |
| 1106 | c-file-style: "linux" |
| 1107 | c-basic-offset: 4 |
| 1108 | tab-width: 4 |
| 1109 | End: |
| 1110 | */ |