Erik Andersen | ccc7488 | 2000-01-27 02:40:21 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Mini init implementation for busybox |
| 4 | * |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 5 | * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>. |
Eric Andersen | 1d1d2f9 | 2002-04-13 08:31:59 +0000 | [diff] [blame] | 6 | * Copyright (C) 1999-2002 by Erik Andersen <andersee@debian.org> |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 7 | * Adjusted by so many folks, it's impossible to keep track. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | * |
| 23 | */ |
| 24 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 25 | /* Turn this on to disable all the dangerous |
| 26 | rebooting stuff when debugging. |
| 27 | #define DEBUG_INIT |
| 28 | */ |
| 29 | |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 30 | #include <stdio.h> |
| 31 | #include <stdlib.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 32 | #include <errno.h> |
Eric Andersen | b186d98 | 1999-12-03 09:19:54 +0000 | [diff] [blame] | 33 | #include <paths.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 34 | #include <signal.h> |
| 35 | #include <stdarg.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 36 | #include <string.h> |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 37 | #include <termios.h> |
| 38 | #include <unistd.h> |
Eric Andersen | ed3ef50 | 2001-01-27 08:24:39 +0000 | [diff] [blame] | 39 | #include <limits.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 40 | #include <sys/fcntl.h> |
| 41 | #include <sys/ioctl.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 42 | #include <sys/mount.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 43 | #include <sys/types.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 44 | #include <sys/wait.h> |
Eric Andersen | 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 | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 54 | #define INIT_BUFFS_SIZE 256 |
| 55 | |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 56 | /* From <linux/vt.h> */ |
| 57 | struct vt_stat { |
| 58 | unsigned short v_active; /* active vt */ |
| 59 | unsigned short v_signal; /* signal to send */ |
| 60 | unsigned short v_state; /* vt bitmask */ |
| 61 | }; |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 62 | static const int VT_GETSTATE = 0x5603; /* get global vt state info */ |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 63 | |
| 64 | /* From <linux/serial.h> */ |
| 65 | struct serial_struct { |
| 66 | int type; |
| 67 | int line; |
| 68 | int port; |
| 69 | int irq; |
| 70 | int flags; |
| 71 | int xmit_fifo_size; |
| 72 | int custom_divisor; |
| 73 | int baud_base; |
| 74 | unsigned short close_delay; |
| 75 | char reserved_char[2]; |
| 76 | int hub6; |
| 77 | unsigned short closing_wait; /* time to wait before closing */ |
| 78 | unsigned short closing_wait2; /* no longer used... */ |
| 79 | int reserved[4]; |
| 80 | }; |
| 81 | |
| 82 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 83 | #if (__GNU_LIBRARY__ > 5) || defined(__dietlibc__) |
| 84 | #include <sys/reboot.h> |
| 85 | #define init_reboot(magic) reboot(magic) |
| 86 | #else |
| 87 | #define init_reboot(magic) reboot(0xfee1dead, 672274793, magic) |
| 88 | #endif |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 89 | |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 90 | #ifndef _PATH_STDPATH |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 91 | #define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin" |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 92 | #endif |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 93 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 94 | #if defined CONFIG_FEATURE_INIT_COREDUMPS |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 95 | /* |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 96 | * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called |
| 97 | * before processes are spawned to set core file size as unlimited. |
| 98 | * This is for debugging only. Don't use this is production, unless |
| 99 | * you want core dumps lying about.... |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 100 | */ |
| 101 | #define CORE_ENABLE_FLAG_FILE "/.init_enable_core" |
| 102 | #include <sys/resource.h> |
| 103 | #include <sys/time.h> |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 104 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 105 | |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 106 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 107 | |
Eric Andersen | b6b519b | 2001-04-09 23:52:18 +0000 | [diff] [blame] | 108 | #if __GNU_LIBRARY__ > 5 |
| 109 | #include <sys/kdaemon.h> |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 110 | #else |
Eric Andersen | b6b519b | 2001-04-09 23:52:18 +0000 | [diff] [blame] | 111 | extern int bdflush (int func, long int data); |
| 112 | #endif |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 113 | |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 114 | #define SHELL "/bin/sh" /* Default shell */ |
| 115 | #define LOGIN_SHELL "-" SHELL /* Default login shell */ |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 116 | #define INITTAB "/etc/inittab" /* inittab file location */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 117 | #ifndef INIT_SCRIPT |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 118 | #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 119 | #endif |
Erik Andersen | 9c88cac | 1999-12-30 09:25:17 +0000 | [diff] [blame] | 120 | |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 121 | #define MAXENV 16 /* Number of env. vars */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 122 | |
| 123 | /* Allowed init action types */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 124 | #define SYSINIT 0x001 |
| 125 | #define RESPAWN 0x002 |
| 126 | #define ASKFIRST 0x004 |
| 127 | #define WAIT 0x008 |
| 128 | #define ONCE 0x010 |
| 129 | #define CTRLALTDEL 0x020 |
| 130 | #define SHUTDOWN 0x040 |
| 131 | #define RESTART 0x080 |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 132 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 133 | /* A mapping between "inittab" action name strings and action type codes. */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 134 | struct init_action_type { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 135 | const char *name; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 136 | int action; |
| 137 | }; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 138 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 139 | static const struct init_action_type actions[] = { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 140 | {"sysinit", SYSINIT}, |
| 141 | {"respawn", RESPAWN}, |
| 142 | {"askfirst", ASKFIRST}, |
| 143 | {"wait", WAIT}, |
| 144 | {"once", ONCE}, |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 145 | {"ctrlaltdel", CTRLALTDEL}, |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 146 | {"shutdown", SHUTDOWN}, |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 147 | {"restart", RESTART}, |
Pavel Roskin | 9027bcf | 2000-07-14 15:44:25 +0000 | [diff] [blame] | 148 | {0, 0} |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 149 | }; |
| 150 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 151 | /* Set up a linked list of init_actions, to be read from inittab */ |
| 152 | struct init_action { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 153 | pid_t pid; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 154 | char command[INIT_BUFFS_SIZE]; |
| 155 | char terminal[INIT_BUFFS_SIZE]; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 156 | struct init_action *next; |
| 157 | int action; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 158 | }; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 159 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 160 | /* Static variables */ |
| 161 | static struct init_action *init_action_list = NULL; |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 162 | static char *secondConsole = VC_2; |
| 163 | static char *thirdConsole = VC_3; |
| 164 | static char *fourthConsole = VC_4; |
| 165 | static char *log = VC_5; |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 166 | static int kernelVersion = 0; |
| 167 | static char termType[32] = "TERM=linux"; |
| 168 | static char console[32] = _PATH_CONSOLE; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 169 | static sig_atomic_t got_cont = 0; |
| 170 | static const int LOG = 0x1; |
| 171 | static const int CONSOLE = 0x2; |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 172 | #if defined CONFIG_FEATURE_EXTRA_QUIET |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 173 | static const int MAYBE_CONSOLE = 0x0; |
| 174 | #else |
| 175 | #define MAYBE_CONSOLE CONSOLE |
| 176 | #endif |
| 177 | #ifndef RB_HALT_SYSTEM |
| 178 | static const int RB_HALT_SYSTEM = 0xcdef0123; |
| 179 | static const int RB_ENABLE_CAD = 0x89abcdef; |
| 180 | static const int RB_DISABLE_CAD = 0; |
| 181 | #define RB_POWER_OFF 0x4321fedc |
| 182 | static const int RB_AUTOBOOT = 0x01234567; |
| 183 | #endif |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 184 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 185 | /* Function prototypes */ |
| 186 | static void delete_init_action(struct init_action *a); |
| 187 | static int waitfor(struct init_action *a); |
| 188 | |
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 |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 203 | static void message(int device, char *fmt, ...) __attribute__ ((format (printf, 2, 3))); |
Erik Andersen | 93d6513 | 2000-04-06 08:06:36 +0000 | [diff] [blame] | 204 | static void message(int device, char *fmt, ...) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 205 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 206 | va_list arguments; |
| 207 | int fd; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 208 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 209 | #ifdef CONFIG_SYSLOGD |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 210 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 211 | /* Log the message to syslogd */ |
| 212 | if (device & LOG) { |
| 213 | char msg[1024]; |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 214 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 215 | va_start(arguments, fmt); |
| 216 | vsnprintf(msg, sizeof(msg), fmt, arguments); |
| 217 | va_end(arguments); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 218 | syslog_msg(LOG_USER, LOG_INFO, msg); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 219 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 220 | #else |
| 221 | static int log_fd = -1; |
| 222 | |
| 223 | /* Take full control of the log tty, and never close it. |
| 224 | * It's mine, all mine! Muhahahaha! */ |
| 225 | if (log_fd < 0) { |
| 226 | if (log == NULL) { |
| 227 | /* don't even try to log, because there is no such console */ |
| 228 | log_fd = -2; |
| 229 | /* log to main console instead */ |
| 230 | device = CONSOLE; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 231 | } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) { |
| 232 | log_fd = -2; |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 233 | fprintf(stderr, "Bummer, can't write to log on %s!\n", log); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 234 | log = NULL; |
| 235 | device = CONSOLE; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 236 | } |
| 237 | } |
| 238 | if ((device & LOG) && (log_fd >= 0)) { |
| 239 | va_start(arguments, fmt); |
| 240 | vdprintf(log_fd, fmt, arguments); |
| 241 | va_end(arguments); |
| 242 | } |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 243 | #endif |
| 244 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 245 | if (device & CONSOLE) { |
| 246 | /* Always send console messages to /dev/console so people will see them. */ |
| 247 | if ( |
| 248 | (fd = |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 249 | device_open(_PATH_CONSOLE, O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 250 | va_start(arguments, fmt); |
| 251 | vdprintf(fd, fmt, arguments); |
| 252 | va_end(arguments); |
| 253 | close(fd); |
| 254 | } else { |
| 255 | fprintf(stderr, "Bummer, can't print: "); |
| 256 | va_start(arguments, fmt); |
| 257 | vfprintf(stderr, fmt, arguments); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 258 | va_end(arguments); |
| 259 | } |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 260 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 261 | } |
| 262 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 263 | /* Set terminal settings to reasonable defaults */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 264 | static void set_term(int fd) |
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 | struct termios 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 | tcgetattr(fd, &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 | /* set control chars */ |
Eric Andersen | 3849f9b | 2000-07-10 19:56:47 +0000 | [diff] [blame] | 271 | tty.c_cc[VINTR] = 3; /* C-c */ |
| 272 | tty.c_cc[VQUIT] = 28; /* C-\ */ |
| 273 | tty.c_cc[VERASE] = 127; /* C-? */ |
| 274 | tty.c_cc[VKILL] = 21; /* C-u */ |
| 275 | tty.c_cc[VEOF] = 4; /* C-d */ |
| 276 | tty.c_cc[VSTART] = 17; /* C-q */ |
| 277 | tty.c_cc[VSTOP] = 19; /* C-s */ |
| 278 | tty.c_cc[VSUSP] = 26; /* C-z */ |
Eric Andersen | 02bc25b | 2000-07-06 21:29:32 +0000 | [diff] [blame] | 279 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 280 | /* use line dicipline 0 */ |
| 281 | tty.c_line = 0; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 282 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 283 | /* Make it be sane */ |
Erik Andersen | 6c41c44 | 2000-03-19 05:13:49 +0000 | [diff] [blame] | 284 | tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD; |
Eric Andersen | d886292 | 2001-04-23 15:14:11 +0000 | [diff] [blame] | 285 | tty.c_cflag |= CREAD|HUPCL|CLOCAL; |
| 286 | |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 287 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 288 | /* input modes */ |
| 289 | tty.c_iflag = ICRNL | IXON | IXOFF; |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 290 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 291 | /* output modes */ |
| 292 | tty.c_oflag = OPOST | ONLCR; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 293 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 294 | /* local modes */ |
| 295 | tty.c_lflag = |
| 296 | ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 297 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 298 | tcsetattr(fd, TCSANOW, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 299 | } |
| 300 | |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 301 | /* How much memory does this machine have? |
| 302 | Units are kBytes to avoid overflow on 4GB machines */ |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 303 | static int check_free_memory(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 304 | { |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 305 | struct sysinfo info; |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 306 | unsigned int result, u, s=10; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 307 | |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 308 | if (sysinfo(&info) != 0) { |
Eric Andersen | 53cfb7e | 2001-01-31 17:29:47 +0000 | [diff] [blame] | 309 | perror_msg("Error checking free memory"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 310 | return -1; |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 311 | } |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 312 | |
| 313 | /* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes. |
| 314 | * Kernels 2.4.0 return info.mem_unit in bytes. */ |
| 315 | u = info.mem_unit; |
| 316 | if (u==0) u=1; |
| 317 | while ( (u&1) == 0 && s > 0 ) { u>>=1; s--; } |
| 318 | result = (info.totalram>>s) + (info.totalswap>>s); |
| 319 | result = result*u; |
| 320 | if (result < 0) result = INT_MAX; |
| 321 | return result; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 322 | } |
| 323 | |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 324 | static void console_init(void) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 325 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 326 | int fd; |
| 327 | int tried_devcons = 0; |
| 328 | int tried_vtprimary = 0; |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 329 | struct vt_stat vt; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 330 | struct serial_struct sr; |
| 331 | char *s; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 332 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 333 | if ((s = getenv("TERM")) != NULL) { |
| 334 | snprintf(termType, sizeof(termType) - 1, "TERM=%s", s); |
| 335 | } |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 336 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 337 | if ((s = getenv("CONSOLE")) != NULL) { |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 338 | safe_strncpy(console, s, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 339 | } |
Eric Andersen | fbb39c8 | 1999-11-08 17:00:52 +0000 | [diff] [blame] | 340 | #if #cpu(sparc) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 341 | /* sparc kernel supports console=tty[ab] parameter which is also |
| 342 | * passed to init, so catch it here */ |
| 343 | else if ((s = getenv("console")) != NULL) { |
| 344 | /* remap tty[ab] to /dev/ttyS[01] */ |
| 345 | if (strcmp(s, "ttya") == 0) |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 346 | safe_strncpy(console, SC_0, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 347 | else if (strcmp(s, "ttyb") == 0) |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 348 | safe_strncpy(console, SC_1, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 349 | } |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 350 | #endif |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 351 | else { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 352 | /* 2.2 kernels: identify the real console backend and try to use it */ |
| 353 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
| 354 | /* this is a serial console */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 355 | snprintf(console, sizeof(console) - 1, SC_FORMAT, sr.line); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 356 | } else if (ioctl(0, VT_GETSTATE, &vt) == 0) { |
| 357 | /* this is linux virtual tty */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 358 | snprintf(console, sizeof(console) - 1, VC_FORMAT, vt.v_active); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 359 | } else { |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 360 | safe_strncpy(console, _PATH_CONSOLE, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 361 | tried_devcons++; |
| 362 | } |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 363 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 364 | |
| 365 | while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) { |
| 366 | /* Can't open selected console -- try /dev/console */ |
| 367 | if (!tried_devcons) { |
| 368 | tried_devcons++; |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 369 | safe_strncpy(console, _PATH_CONSOLE, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 370 | continue; |
| 371 | } |
| 372 | /* Can't open selected console -- try vt1 */ |
| 373 | if (!tried_vtprimary) { |
| 374 | tried_vtprimary++; |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 375 | safe_strncpy(console, VC_1, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 376 | continue; |
| 377 | } |
| 378 | break; |
| 379 | } |
| 380 | if (fd < 0) { |
| 381 | /* Perhaps we should panic here? */ |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 382 | safe_strncpy(console, "/dev/null", sizeof(console)); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 383 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 384 | /* check for serial console and disable logging to tty5 & |
| 385 | * running a shell to tty2-4 */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 386 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 387 | log = NULL; |
| 388 | secondConsole = NULL; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 389 | thirdConsole = NULL; |
| 390 | fourthConsole = NULL; |
Erik Andersen | fa4718e | 2000-02-21 19:25:12 +0000 | [diff] [blame] | 391 | /* Force the TERM setting to vt102 for serial console -- |
| 392 | * iff TERM is set to linux (the default) */ |
| 393 | if (strcmp( termType, "TERM=linux" ) == 0) |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 394 | safe_strncpy(termType, "TERM=vt102", sizeof(termType)); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 395 | message(LOG | CONSOLE, |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 396 | "\rserial console detected. Disabling virtual terminals.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 397 | } |
| 398 | close(fd); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 399 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 400 | message(LOG, "console=%s\n", console); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 401 | } |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 402 | |
| 403 | static void fixup_argv(int argc, char **argv, char *new_argv0) |
| 404 | { |
| 405 | int len; |
| 406 | /* Fix up argv[0] to be certain we claim to be init */ |
| 407 | len = strlen(argv[0]); |
| 408 | memset(argv[0], 0, len); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 409 | safe_strncpy(argv[0], new_argv0, len + 1); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 410 | |
| 411 | /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */ |
| 412 | len = 1; |
| 413 | while (argc > len) { |
| 414 | memset(argv[len], 0, strlen(argv[len])); |
| 415 | len++; |
| 416 | } |
| 417 | } |
| 418 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 419 | /* Make sure there is enough memory to do something useful. * |
| 420 | * Calls "swapon -a" if needed so be sure /etc/fstab is present... */ |
| 421 | static void check_memory(void) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 422 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 423 | struct stat statBuf; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 424 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 425 | if (check_free_memory() > 1000) |
| 426 | return; |
| 427 | |
| 428 | #if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) |
| 429 | if (stat("/etc/fstab", &statBuf) == 0) { |
| 430 | /* swapon -a requires /proc typically */ |
| 431 | system("/bin/mount -t proc proc /proc"); |
| 432 | /* Try to turn on swap */ |
| 433 | system("/sbin/swapon -a"); |
| 434 | if (check_free_memory() < 1000) |
| 435 | goto goodnight; |
| 436 | } else |
| 437 | goto goodnight; |
| 438 | return; |
Eric Andersen | 3862423 | 2001-01-25 00:04:16 +0000 | [diff] [blame] | 439 | #endif |
| 440 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 441 | goodnight: |
| 442 | message(CONSOLE, |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 443 | "\rSorry, your computer does not have enough memory.\n"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 444 | loop_forever(); |
| 445 | } |
| 446 | |
| 447 | static pid_t run(struct init_action *a) |
| 448 | { |
| 449 | struct stat sb; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 450 | int i, j, junk; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 451 | pid_t pid, pgrp, tmp_pid; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 452 | char *s, *tmpCmd, *cmd[INIT_BUFFS_SIZE], *cmdpath; |
| 453 | char buf[INIT_BUFFS_SIZE+6]; /* INIT_BUFFS_SIZE+strlen("exec ")+1 */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 454 | sigset_t nmask, omask; |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 455 | char *environment[MAXENV+1] = { |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 456 | termType, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 457 | "HOME=/", |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 458 | "PATH=" _PATH_STDPATH, |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 459 | "SHELL=" SHELL, |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 460 | "USER=root", |
| 461 | NULL |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 462 | }; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 463 | static const char press_enter[] = |
| 464 | #ifdef CUSTOMIZED_BANNER |
| 465 | #include CUSTOMIZED_BANNER |
| 466 | #endif |
| 467 | "\nPlease press Enter to activate this console. "; |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 468 | |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 469 | /* inherit environment to the child, merging our values -andy */ |
| 470 | for (i=0; environ[i]; i++) { |
| 471 | for (j=0; environment[j]; j++) { |
| 472 | s = strchr(environment[j], '='); |
| 473 | if (!strncmp(environ[i], environment[j], s - environment[j])) |
| 474 | break; |
| 475 | } |
| 476 | if (!environment[j]) { |
| 477 | environment[j++] = environ[i]; |
| 478 | environment[j] = NULL; |
| 479 | } |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 480 | } |
| 481 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 482 | /* Block sigchild while forking. */ |
| 483 | sigemptyset(&nmask); |
| 484 | sigaddset(&nmask, SIGCHLD); |
| 485 | sigprocmask(SIG_BLOCK, &nmask, &omask); |
| 486 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 487 | if ((pid = fork()) == 0) |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 488 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 489 | /* Clean up */ |
| 490 | close(0); |
| 491 | close(1); |
| 492 | close(2); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 493 | sigprocmask(SIG_SETMASK, &omask, NULL); |
| 494 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 495 | /* Reset signal handlers that were set by the parent process */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 496 | signal(SIGUSR1, SIG_DFL); |
| 497 | signal(SIGUSR2, SIG_DFL); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 498 | signal(SIGINT, SIG_DFL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 499 | signal(SIGTERM, SIG_DFL); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 500 | signal(SIGHUP, SIG_DFL); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 501 | signal(SIGCONT, SIG_DFL); |
| 502 | signal(SIGSTOP, SIG_DFL); |
| 503 | signal(SIGTSTP, SIG_DFL); |
Eric Andersen | 2f6c04f | 1999-11-01 23:59:44 +0000 | [diff] [blame] | 504 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 505 | /* Create a new session and make ourself the process |
| 506 | * group leader for non-interactive jobs */ |
| 507 | if ((a->action & (RESPAWN))==0) |
| 508 | setsid(); |
| 509 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 510 | /* Open the new terminal device */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 511 | if ((device_open(a->terminal, O_RDWR|O_NOCTTY)) < 0) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 512 | if (stat(a->terminal, &sb) != 0) { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 513 | message(LOG | CONSOLE, "\rdevice '%s' does not exist.\n", |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 514 | a->terminal); |
| 515 | _exit(1); |
Eric Andersen | 53f5061 | 2001-03-14 09:01:11 +0000 | [diff] [blame] | 516 | } |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 517 | message(LOG | CONSOLE, "\rBummer, can't open %s\n", a->terminal); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 518 | _exit(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 519 | } |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 520 | |
| 521 | /* Non-interactive jobs should not get a controling tty */ |
| 522 | if ((a->action & (RESPAWN))==0) |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 523 | (void)ioctl(0, TIOCSCTTY, 0); |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 524 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 525 | /* Make sure the terminal will act fairly normal for us */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 526 | set_term(0); |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 527 | /* Setup stdout, stderr for the new process so |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 528 | * they point to the supplied terminal */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 529 | dup(0); |
| 530 | dup(0); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 531 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 532 | /* For interactive jobs, create a new session |
| 533 | * and become the process group leader */ |
| 534 | if ((a->action & (RESPAWN))) |
| 535 | setsid(); |
| 536 | |
| 537 | /* If the init Action requires us to wait, then force the |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 538 | * supplied terminal to be the controlling tty. */ |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 539 | if (a->action & (SYSINIT|WAIT|CTRLALTDEL|SHUTDOWN|RESTART)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 540 | |
| 541 | /* Now fork off another process to just hang around */ |
| 542 | if ((pid = fork()) < 0) { |
| 543 | message(LOG | CONSOLE, "Can't fork!\n"); |
| 544 | _exit(1); |
| 545 | } |
| 546 | |
| 547 | if (pid > 0) { |
| 548 | |
| 549 | /* We are the parent -- wait till the child is done */ |
| 550 | signal(SIGINT, SIG_IGN); |
| 551 | signal(SIGTSTP, SIG_IGN); |
| 552 | signal(SIGQUIT, SIG_IGN); |
| 553 | signal(SIGCHLD, SIG_DFL); |
| 554 | |
| 555 | /* Wait for child to exit */ |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 556 | while ((tmp_pid = waitpid(pid, &junk, 0)) != pid) |
| 557 | ; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 558 | |
| 559 | /* See if stealing the controlling tty back is necessary */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 560 | pgrp = tcgetpgrp(0); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 561 | if (pgrp != getpid()) |
| 562 | _exit(0); |
| 563 | |
| 564 | /* Use a temporary process to steal the controlling tty. */ |
| 565 | if ((pid = fork()) < 0) { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 566 | message(LOG | CONSOLE, "\rCan't fork!\n"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 567 | _exit(1); |
| 568 | } |
| 569 | if (pid == 0) { |
| 570 | setsid(); |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 571 | ioctl(0, TIOCSCTTY, 1); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 572 | _exit(0); |
| 573 | } |
| 574 | while((tmp_pid = waitpid(pid, &junk, 0)) != pid) { |
| 575 | if (tmp_pid < 0 && errno == ECHILD) |
| 576 | break; |
| 577 | } |
| 578 | _exit(0); |
| 579 | } |
| 580 | |
| 581 | /* Now fall though to actually execute things */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 582 | } |
| 583 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 584 | /* See if any special /bin/sh requiring characters are present */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 585 | if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 586 | cmd[0] = SHELL; |
| 587 | cmd[1] = "-c"; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 588 | strcat(strcpy(buf, "exec "), a->command); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 589 | cmd[2] = buf; |
| 590 | cmd[3] = NULL; |
| 591 | } else { |
| 592 | /* Convert command (char*) into cmd (char**, one word per string) */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 593 | strcpy(buf, a->command); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 594 | s = buf; |
| 595 | for (tmpCmd = buf, i = 0; |
| 596 | (tmpCmd = strsep(&s, " \t")) != NULL;) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 597 | if (*tmpCmd != '\0') { |
| 598 | cmd[i] = tmpCmd; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 599 | i++; |
| 600 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 601 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 602 | cmd[i] = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 603 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 604 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 605 | cmdpath = cmd[0]; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 606 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 607 | /* |
| 608 | Interactive shells want to see a dash in argv[0]. This |
| 609 | typically is handled by login, argv will be setup this |
| 610 | way if a dash appears at the front of the command path |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 611 | (like "-/bin/sh"). |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 612 | */ |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 613 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 614 | if (*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 | /* skip over the dash */ |
| 617 | ++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 | /* find the last component in the command pathname */ |
| 620 | s = get_last_path_component(cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 621 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 622 | /* make a new argv[0] */ |
| 623 | if ((cmd[0] = malloc(strlen(s)+2)) == NULL) { |
| 624 | message(LOG | CONSOLE, "malloc failed"); |
| 625 | cmd[0] = cmdpath; |
| 626 | } else { |
| 627 | cmd[0][0] = '-'; |
| 628 | strcpy(cmd[0]+1, s); |
| 629 | } |
| 630 | } |
| 631 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 632 | if (a->action & ASKFIRST) { |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 633 | /* |
| 634 | * Save memory by not exec-ing anything large (like a shell) |
| 635 | * before the user wants it. This is critical if swap is not |
| 636 | * enabled and the system has low memory. Generally this will |
| 637 | * be run on the second virtual console, and the first will |
| 638 | * be allowed to start a shell or whatever an init script |
| 639 | * specifies. |
| 640 | */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 641 | messageND(LOG, "Waiting for enter to start '%s' (pid %d, terminal %s)\n", |
| 642 | cmdpath, getpid(), a->terminal); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 643 | write(fileno(stdout), press_enter, sizeof(press_enter) - 1); |
| 644 | getc(stdin); |
| 645 | } |
| 646 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 647 | /* Log the process name and args */ |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 648 | messageND(LOG, "Starting pid %d, console %s: '%s'\n", |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 649 | getpid(), a->terminal, cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 650 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 651 | #if defined CONFIG_FEATURE_INIT_COREDUMPS |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 652 | if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) { |
| 653 | struct rlimit limit; |
| 654 | limit.rlim_cur = RLIM_INFINITY; |
| 655 | limit.rlim_max = RLIM_INFINITY; |
| 656 | setrlimit(RLIMIT_CORE, &limit); |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 657 | } |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 658 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 659 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 660 | /* Now run it. The new program will take over this PID, |
| 661 | * so nothing further in init.c should be run. */ |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 662 | execve(cmdpath, cmd, environment); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 663 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 664 | /* We're still here? Some error happened. */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 665 | message(LOG | CONSOLE, "\rBummer, could not run '%s': %s\n", cmdpath, |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 666 | strerror(errno)); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 667 | _exit(-1); |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 668 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 669 | sigprocmask(SIG_SETMASK, &omask, NULL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 670 | return pid; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 671 | } |
| 672 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 673 | static int waitfor(struct init_action *a) |
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 | int pid; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 676 | int status, wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 677 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 678 | pid = run(a); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 679 | while (1) { |
| 680 | wpid = wait(&status); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 681 | if (wpid > 0 && wpid != pid) { |
| 682 | continue; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 683 | } |
| 684 | if (wpid == pid) |
| 685 | break; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 686 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 687 | return wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 688 | } |
| 689 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 690 | /* Run all commands of a particular type */ |
| 691 | static void run_actions(int action) |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 692 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 693 | struct init_action *a, *tmp; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 694 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 695 | for (a = init_action_list; a; a = tmp) { |
| 696 | tmp = a->next; |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 697 | if (a->action == action) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 698 | if (a->action & (SYSINIT|WAIT|CTRLALTDEL|SHUTDOWN|RESTART)) { |
| 699 | waitfor(a); |
| 700 | delete_init_action(a); |
| 701 | } else if (a->action & ONCE) { |
| 702 | run(a); |
| 703 | delete_init_action(a); |
| 704 | } else if (a->action & (RESPAWN|ASKFIRST)) { |
| 705 | /* Only run stuff with pid==0. If they have |
| 706 | * a pid, that means it is still running */ |
| 707 | if (a->pid == 0) { |
| 708 | a->pid = run(a); |
| 709 | } |
| 710 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 711 | } |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 716 | #ifndef DEBUG_INIT |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 717 | static void shutdown_system(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 718 | { |
Eric Andersen | 813d88c | 2001-10-28 22:49:48 +0000 | [diff] [blame] | 719 | sigset_t block_signals; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 720 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 721 | /* first disable all our signals */ |
| 722 | sigemptyset(&block_signals); |
| 723 | sigaddset(&block_signals, SIGHUP); |
| 724 | sigaddset(&block_signals, SIGCHLD); |
| 725 | sigaddset(&block_signals, SIGUSR1); |
| 726 | sigaddset(&block_signals, SIGUSR2); |
| 727 | sigaddset(&block_signals, SIGINT); |
| 728 | sigaddset(&block_signals, SIGTERM); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 729 | sigaddset(&block_signals, SIGCONT); |
| 730 | sigaddset(&block_signals, SIGSTOP); |
| 731 | sigaddset(&block_signals, SIGTSTP); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 732 | sigprocmask(SIG_BLOCK, &block_signals, NULL); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 733 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 734 | /* Allow Ctrl-Alt-Del to reboot system. */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 735 | init_reboot(RB_ENABLE_CAD); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 736 | |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 737 | message(CONSOLE|LOG, "\n\rThe system is going down NOW !!\n"); |
Eric Andersen | cf8c9cf | 1999-11-05 00:31:46 +0000 | [diff] [blame] | 738 | sync(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 739 | |
| 740 | /* Send signals to every process _except_ pid 1 */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 741 | message(CONSOLE|LOG, "\rSending SIGTERM to all processes.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 742 | kill(-1, SIGTERM); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 743 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 744 | sync(); |
| 745 | |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 746 | message(CONSOLE|LOG, "\rSending SIGKILL to all processes.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 747 | kill(-1, SIGKILL); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 748 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 749 | |
Matt Kraai | 8fc364e | 2001-04-12 20:12:16 +0000 | [diff] [blame] | 750 | /* run everything to be run at "shutdown" */ |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 751 | run_actions(SHUTDOWN); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 752 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 753 | sync(); |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 754 | if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 755 | /* bdflush, kupdate not needed for kernels >2.2.11 */ |
| 756 | bdflush(1, 0); |
| 757 | sync(); |
| 758 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 759 | } |
| 760 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 761 | static void exec_signal(int sig) |
| 762 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 763 | struct init_action *a, *tmp; |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 764 | sigset_t unblock_signals; |
| 765 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 766 | for (a = init_action_list; a; a = tmp) { |
| 767 | tmp = a->next; |
| 768 | if (a->action & RESTART) { |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 769 | shutdown_system(); |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 770 | |
| 771 | /* unblock all signals, blocked in shutdown_system() */ |
| 772 | sigemptyset(&unblock_signals); |
| 773 | sigaddset(&unblock_signals, SIGHUP); |
| 774 | sigaddset(&unblock_signals, SIGCHLD); |
| 775 | sigaddset(&unblock_signals, SIGUSR1); |
| 776 | sigaddset(&unblock_signals, SIGUSR2); |
| 777 | sigaddset(&unblock_signals, SIGINT); |
| 778 | sigaddset(&unblock_signals, SIGTERM); |
| 779 | sigaddset(&unblock_signals, SIGCONT); |
| 780 | sigaddset(&unblock_signals, SIGSTOP); |
| 781 | sigaddset(&unblock_signals, SIGTSTP); |
| 782 | sigprocmask(SIG_UNBLOCK, &unblock_signals, NULL); |
| 783 | |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 784 | message(CONSOLE|LOG, "\rTrying to re-exec %s\n", a->command); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 785 | execl(a->command, a->command, NULL); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 786 | |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 787 | message(CONSOLE|LOG, "\rexec of '%s' failed: %s\n", |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 788 | a->command, sys_errlist[errno]); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 789 | sync(); |
| 790 | sleep(2); |
| 791 | init_reboot(RB_HALT_SYSTEM); |
| 792 | loop_forever(); |
| 793 | } |
| 794 | } |
| 795 | } |
| 796 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 797 | static void halt_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 798 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 799 | shutdown_system(); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 800 | message(CONSOLE|LOG, |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 801 | #if #cpu(s390) |
| 802 | /* Seems the s390 console is Wierd(tm). */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 803 | "\rThe system is halted. You may reboot now.\n" |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 804 | #else |
| 805 | /* secondConsole is NULL for a serial console */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 806 | "\rThe system is halted. Press %s or turn off power\n", |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 807 | (secondConsole == NULL)? "Reset" : "CTRL-ALT-DEL" |
| 808 | #endif |
| 809 | ); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 810 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 811 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 812 | /* allow time for last message to reach serial console */ |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 813 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 814 | |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 815 | if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0)) |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 816 | init_reboot(RB_POWER_OFF); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 817 | else |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 818 | init_reboot(RB_HALT_SYSTEM); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 819 | |
| 820 | loop_forever(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 821 | } |
| 822 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 823 | static void reboot_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 824 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 825 | shutdown_system(); |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 826 | message(CONSOLE|LOG, "\rPlease stand by while rebooting the system.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 827 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 828 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 829 | /* allow time for last message to reach serial console */ |
| 830 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 831 | |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 832 | init_reboot(RB_AUTOBOOT); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 833 | |
| 834 | loop_forever(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 835 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 836 | |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 837 | static void ctrlaltdel_signal(int sig) |
| 838 | { |
| 839 | run_actions(CTRLALTDEL); |
| 840 | } |
| 841 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 842 | /* The SIGSTOP & SIGTSTP handler */ |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 843 | static void stop_handler(int sig) |
| 844 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 845 | int saved_errno = errno; |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 846 | |
| 847 | got_cont = 0; |
| 848 | while(!got_cont) pause(); |
| 849 | got_cont = 0; |
| 850 | errno = saved_errno; |
| 851 | } |
| 852 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 853 | /* The SIGCONT handler */ |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 854 | static void cont_handler(int sig) |
| 855 | { |
| 856 | got_cont = 1; |
| 857 | } |
| 858 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 859 | #endif /* ! DEBUG_INIT */ |
Erik Andersen | de55287 | 2000-01-23 01:34:05 +0000 | [diff] [blame] | 860 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 861 | static void new_init_action(int action, char *command, char *cons) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 862 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 863 | struct init_action *new_action, *a; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 864 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 865 | if (*cons == '\0') |
| 866 | cons = console; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 867 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 868 | /* If BusyBox detects that a serial console is in use, then entries |
| 869 | * not refering to the console or null devices will _not_ be run. |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 870 | * The exception to this rule is the null device. |
| 871 | */ |
| 872 | if (secondConsole == NULL && strcmp(cons, console) |
| 873 | && strcmp(cons, "/dev/null")) |
| 874 | return; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 875 | if (strcmp(cons, "/dev/null") == 0 && (action & ASKFIRST)) |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 876 | return; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 877 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 878 | new_action = calloc((size_t) (1), sizeof(struct init_action)); |
| 879 | if (!new_action) { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 880 | message(LOG | CONSOLE, "\rMemory allocation failure\n"); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 881 | loop_forever(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 882 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 883 | |
| 884 | /* Append to the end of the list */ |
| 885 | for (a = init_action_list; a && a->next; a = a->next) ; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 886 | if (a) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 887 | a->next = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 888 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 889 | init_action_list = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 890 | } |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 891 | strcpy(new_action->command, command); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 892 | new_action->action = action; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 893 | strcpy(new_action->terminal, cons); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 894 | new_action->pid = 0; |
| 895 | // message(LOG|CONSOLE, "command='%s' action='%d' terminal='%s'\n", |
| 896 | // new_action->command, new_action->action, new_action->terminal); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 897 | } |
| 898 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 899 | static void delete_init_action(struct init_action * action) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 900 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 901 | struct init_action *a, *b = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 902 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 903 | for (a = init_action_list; a; b = a, a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 904 | if (a == action) { |
| 905 | if (b == NULL) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 906 | init_action_list = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 907 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 908 | b->next = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 909 | } |
| 910 | free(a); |
| 911 | break; |
| 912 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 913 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 914 | } |
| 915 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 916 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 917 | * then parse_inittab() simply adds in some default |
Eric Andersen | 77d9268 | 2001-05-23 20:32:09 +0000 | [diff] [blame] | 918 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 919 | * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | 812d466 | 2000-01-07 18:30:40 +0000 | [diff] [blame] | 920 | * _is_ defined, but /etc/inittab is missing, this |
| 921 | * results in the same set of default behaviors. |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 922 | * */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 923 | static void parse_inittab(void) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 924 | { |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 925 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 926 | FILE *file; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 927 | char buf[INIT_BUFFS_SIZE], lineAsRead[INIT_BUFFS_SIZE], tmpConsole[INIT_BUFFS_SIZE]; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 928 | char *id, *runlev, *action, *command, *eol; |
| 929 | const struct init_action_type *a = actions; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 930 | int foundIt; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 931 | |
| 932 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 933 | file = fopen(INITTAB, "r"); |
| 934 | if (file == NULL) { |
| 935 | /* No inittab file -- set up some default behavior */ |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 936 | #endif |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 937 | /* Reboot on Ctrl-Alt-Del */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 938 | new_init_action(CTRLALTDEL, "/sbin/reboot", console); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 939 | /* Umount all filesystems on halt/reboot */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 940 | new_init_action(SHUTDOWN, "/bin/umount -a -r", console); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 941 | #if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 942 | /* Swapoff on halt/reboot */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 943 | new_init_action(SHUTDOWN, "/sbin/swapoff -a", console); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 944 | #endif |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 945 | /* Prepare to restart init when a HUP is received */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 946 | new_init_action(RESTART, "/sbin/init", console); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 947 | /* Askfirst shell on tty1 */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 948 | new_init_action(ASKFIRST, LOGIN_SHELL, console); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 949 | /* Askfirst shell on tty2 */ |
| 950 | if (secondConsole != NULL) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 951 | new_init_action(ASKFIRST, LOGIN_SHELL, secondConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 952 | /* Askfirst shell on tty3 */ |
| 953 | if (thirdConsole != NULL) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 954 | new_init_action(ASKFIRST, LOGIN_SHELL, thirdConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 955 | /* Askfirst shell on tty4 */ |
| 956 | if (fourthConsole != NULL) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 957 | new_init_action(ASKFIRST, LOGIN_SHELL, fourthConsole); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 958 | /* sysinit */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 959 | new_init_action(SYSINIT, INIT_SCRIPT, console); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 960 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 961 | return; |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 962 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 963 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 964 | |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 965 | while (fgets(buf, INIT_BUFFS_SIZE, file) != NULL) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 966 | foundIt = FALSE; |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 967 | /* Skip leading spaces */ |
| 968 | for (id = buf; *id == ' ' || *id == '\t'; id++); |
| 969 | |
| 970 | /* Skip the line if it's a comment */ |
| 971 | if (*id == '#' || *id == '\n') |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 972 | continue; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 973 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 974 | /* Trim the trailing \n */ |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 975 | eol = strrchr(id, '\n'); |
| 976 | if (eol != NULL) |
| 977 | *eol = '\0'; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 978 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 979 | /* Keep a copy around for posterity's sake (and error msgs) */ |
| 980 | strcpy(lineAsRead, buf); |
| 981 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 982 | /* Separate the ID field from the runlevels */ |
| 983 | runlev = strchr(id, ':'); |
| 984 | if (runlev == NULL || *(runlev + 1) == '\0') { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 985 | message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 986 | continue; |
| 987 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 988 | *runlev = '\0'; |
| 989 | ++runlev; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 990 | } |
| 991 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 992 | /* Separate the runlevels from the action */ |
| 993 | action = strchr(runlev, ':'); |
| 994 | if (action == NULL || *(action + 1) == '\0') { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 995 | message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 996 | continue; |
| 997 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 998 | *action = '\0'; |
| 999 | ++action; |
| 1000 | } |
| 1001 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1002 | /* Separate the action from the command */ |
| 1003 | command = strchr(action, ':'); |
| 1004 | if (command == NULL || *(command + 1) == '\0') { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 1005 | message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 1006 | continue; |
| 1007 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1008 | *command = '\0'; |
| 1009 | ++command; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1010 | } |
| 1011 | |
| 1012 | /* Ok, now process it */ |
| 1013 | a = actions; |
| 1014 | while (a->name != 0) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 1015 | if (strcmp(a->name, action) == 0) { |
| 1016 | if (*id != '\0') { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1017 | strcpy(tmpConsole, "/dev/"); |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 1018 | strncat(tmpConsole, id, INIT_BUFFS_SIZE-6); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 1019 | id = tmpConsole; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1020 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1021 | new_init_action(a->action, command, id); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1022 | foundIt = TRUE; |
| 1023 | } |
| 1024 | a++; |
| 1025 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1026 | if (foundIt == TRUE) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1027 | continue; |
| 1028 | else { |
| 1029 | /* Choke on an unknown action */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 1030 | message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1031 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 1032 | } |
Eric Andersen | d8636ca | 2002-05-15 22:19:09 +0000 | [diff] [blame] | 1033 | fclose(file); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1034 | return; |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1035 | #endif /* CONFIG_FEATURE_USE_INITTAB */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 1036 | } |
| 1037 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 1038 | |
| 1039 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 1040 | extern int init_main(int argc, char **argv) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1041 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1042 | struct init_action *a; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1043 | pid_t wpid; |
| 1044 | int status; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1045 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 1046 | if (argc > 1 && !strcmp(argv[1], "-q")) { |
Eric Andersen | 467a18b | 2002-01-25 23:13:06 +0000 | [diff] [blame] | 1047 | /* don't assume init's pid == 1 */ |
| 1048 | long *pid = find_pid_by_name("init"); |
| 1049 | if (!pid || *pid<=0) { |
| 1050 | pid = find_pid_by_name("linuxrc"); |
| 1051 | if (!pid || *pid<=0) |
| 1052 | error_msg_and_die("no process killed"); |
| 1053 | } |
| 1054 | kill(*pid, SIGHUP); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 1055 | exit(0); |
| 1056 | } |
| 1057 | |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 1058 | #ifndef DEBUG_INIT |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 1059 | /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */ |
| 1060 | if (getpid() != 1 |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1061 | #ifdef CONFIG_FEATURE_INITRD |
Matt Kraai | e58771e | 2000-07-12 15:38:49 +0000 | [diff] [blame] | 1062 | && strstr(applet_name, "linuxrc") == NULL |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 1063 | #endif |
| 1064 | ) |
| 1065 | { |
Eric Andersen | 67991cf | 2001-02-14 21:23:06 +0000 | [diff] [blame] | 1066 | show_usage(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1067 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1068 | /* Set up sig handlers -- be sure to |
| 1069 | * clear all of these in run() */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1070 | signal(SIGHUP, exec_signal); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1071 | signal(SIGUSR1, halt_signal); |
Eric Andersen | 4c95a28 | 2000-07-07 19:30:28 +0000 | [diff] [blame] | 1072 | signal(SIGUSR2, halt_signal); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1073 | signal(SIGINT, ctrlaltdel_signal); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1074 | signal(SIGTERM, reboot_signal); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 1075 | signal(SIGCONT, cont_handler); |
| 1076 | signal(SIGSTOP, stop_handler); |
| 1077 | signal(SIGTSTP, stop_handler); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1078 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1079 | /* Turn off rebooting via CTL-ALT-DEL -- we get a |
| 1080 | * SIGINT on CAD so we can shut things down gracefully... */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 1081 | init_reboot(RB_DISABLE_CAD); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1082 | #endif |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 1083 | |
Erik Andersen | 298854f | 2000-03-23 01:09:18 +0000 | [diff] [blame] | 1084 | /* Figure out what kernel this is running */ |
| 1085 | kernelVersion = get_kernel_revision(); |
| 1086 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 1087 | /* Figure out where the default console should be */ |
| 1088 | console_init(); |
| 1089 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1090 | /* Close whatever files are open, and reset the console. */ |
| 1091 | close(0); |
| 1092 | close(1); |
| 1093 | close(2); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 1094 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 1095 | if(device_open(console, O_RDWR|O_NOCTTY)==0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1096 | set_term(0); |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 1097 | close(0); |
| 1098 | } |
| 1099 | |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1100 | chdir("/"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1101 | setsid(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1102 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1103 | /* Make sure PATH is set to something sane */ |
Eric Andersen | 452fd33 | 2001-03-04 06:47:33 +0000 | [diff] [blame] | 1104 | putenv("PATH="_PATH_STDPATH); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1105 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1106 | /* Hello world */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 1107 | message(MAYBE_CONSOLE|LOG, "\rinit started: %s\n", full_version); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1108 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1109 | /* Make sure there is enough memory to do something useful. */ |
| 1110 | check_memory(); |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 1111 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1112 | /* Check if we are supposed to be in single user mode */ |
| 1113 | if (argc > 1 && (!strcmp(argv[1], "single") || |
| 1114 | !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) { |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 1115 | /* Ask first then start a shell on tty2-4 */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1116 | if (secondConsole != NULL) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1117 | new_init_action(ASKFIRST, LOGIN_SHELL, secondConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 1118 | if (thirdConsole != NULL) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1119 | new_init_action(ASKFIRST, LOGIN_SHELL, thirdConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 1120 | if (fourthConsole != NULL) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1121 | new_init_action(ASKFIRST, LOGIN_SHELL, fourthConsole); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1122 | /* Start a shell on tty1 */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1123 | new_init_action(RESPAWN, LOGIN_SHELL, console); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1124 | } else { |
| 1125 | /* Not in single user mode -- see what inittab says */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 1126 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1127 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1128 | * then parse_inittab() simply adds in some default |
Eric Andersen | 77d9268 | 2001-05-23 20:32:09 +0000 | [diff] [blame] | 1129 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1130 | * of "askfirst" shells */ |
| 1131 | parse_inittab(); |
Eric Andersen | d00c262 | 1999-12-07 08:37:31 +0000 | [diff] [blame] | 1132 | } |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1133 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 1134 | /* Make the command line just say "init" -- thats all, nothing else */ |
| 1135 | fixup_argv(argc, argv, "init"); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 1136 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1137 | /* Now run everything that needs to be run */ |
| 1138 | |
| 1139 | /* First run the sysinit command */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1140 | run_actions(SYSINIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1141 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1142 | /* Next run anything that wants to block */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1143 | run_actions(WAIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1144 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1145 | /* Next run anything to be run only once */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1146 | run_actions(ONCE); |
| 1147 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1148 | /* If there is nothing else to do, stop */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1149 | if (init_action_list == NULL) { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 1150 | message(LOG | CONSOLE, "\rNo more tasks for init -- sleeping forever.\n"); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 1151 | loop_forever(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1152 | } |
| 1153 | |
| 1154 | /* Now run the looping stuff for the rest of forever */ |
| 1155 | while (1) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1156 | /* run the respawn stuff */ |
| 1157 | run_actions(RESPAWN); |
| 1158 | |
| 1159 | /* run the askfirst stuff */ |
| 1160 | run_actions(ASKFIRST); |
| 1161 | |
| 1162 | /* Don't consume all CPU time -- sleep a bit */ |
| 1163 | sleep(1); |
| 1164 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1165 | /* Wait for a child process to exit */ |
| 1166 | wpid = wait(&status); |
| 1167 | if (wpid > 0) { |
| 1168 | /* Find out who died and clean up their corpse */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1169 | for (a = init_action_list; a; a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1170 | if (a->pid == wpid) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1171 | /* Set the pid to 0 so that the process gets |
| 1172 | * restarted by run_actions() */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1173 | a->pid = 0; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1174 | message(LOG, "Process '%s' (pid %d) exited. " |
| 1175 | "Scheduling it for restart.\n", a->command, wpid); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1176 | } |
| 1177 | } |
| 1178 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1179 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1180 | } |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 1181 | |
| 1182 | /* |
| 1183 | Local Variables: |
| 1184 | c-file-style: "linux" |
| 1185 | c-basic-offset: 4 |
| 1186 | tab-width: 4 |
| 1187 | End: |
| 1188 | */ |