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; |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 162 | static int kernelVersion = 0; |
| 163 | static char termType[32] = "TERM=linux"; |
| 164 | static char console[32] = _PATH_CONSOLE; |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame^] | 165 | static char *log = VC_5; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 166 | static sig_atomic_t got_cont = 0; |
| 167 | static const int LOG = 0x1; |
| 168 | static const int CONSOLE = 0x2; |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 169 | #if defined CONFIG_FEATURE_EXTRA_QUIET |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 170 | static const int MAYBE_CONSOLE = 0x0; |
| 171 | #else |
| 172 | #define MAYBE_CONSOLE CONSOLE |
| 173 | #endif |
| 174 | #ifndef RB_HALT_SYSTEM |
| 175 | static const int RB_HALT_SYSTEM = 0xcdef0123; |
| 176 | static const int RB_ENABLE_CAD = 0x89abcdef; |
| 177 | static const int RB_DISABLE_CAD = 0; |
| 178 | #define RB_POWER_OFF 0x4321fedc |
| 179 | static const int RB_AUTOBOOT = 0x01234567; |
| 180 | #endif |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 181 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 182 | /* Function prototypes */ |
| 183 | static void delete_init_action(struct init_action *a); |
| 184 | static int waitfor(struct init_action *a); |
| 185 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 186 | |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 187 | static void loop_forever(void) |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 188 | { |
| 189 | while (1) |
| 190 | sleep (1); |
| 191 | } |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 192 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 193 | /* Print a message to the specified device. |
| 194 | * Device may be bitwise-or'd from LOG | CONSOLE */ |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 195 | #ifdef DEBUG_INIT |
| 196 | static inline messageND(int device, char *fmt, ...) { } |
| 197 | #else |
| 198 | #define messageND message |
| 199 | #endif |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 200 | static void message(int device, char *fmt, ...) __attribute__ ((format (printf, 2, 3))); |
Erik Andersen | 93d6513 | 2000-04-06 08:06:36 +0000 | [diff] [blame] | 201 | static void message(int device, char *fmt, ...) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 202 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 203 | va_list arguments; |
| 204 | int fd; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 205 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 206 | #ifdef CONFIG_SYSLOGD |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 207 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 208 | /* Log the message to syslogd */ |
| 209 | if (device & LOG) { |
| 210 | char msg[1024]; |
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 | va_start(arguments, fmt); |
| 213 | vsnprintf(msg, sizeof(msg), fmt, arguments); |
| 214 | va_end(arguments); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 215 | syslog_msg(LOG_USER, LOG_INFO, msg); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 216 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 217 | #else |
| 218 | static int log_fd = -1; |
| 219 | |
| 220 | /* Take full control of the log tty, and never close it. |
| 221 | * It's mine, all mine! Muhahahaha! */ |
| 222 | if (log_fd < 0) { |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame^] | 223 | if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 224 | log_fd = -2; |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 225 | fprintf(stderr, "Bummer, can't write to log on %s!\n", log); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 226 | device = CONSOLE; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 227 | } |
| 228 | } |
| 229 | if ((device & LOG) && (log_fd >= 0)) { |
| 230 | va_start(arguments, fmt); |
| 231 | vdprintf(log_fd, fmt, arguments); |
| 232 | va_end(arguments); |
| 233 | } |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 234 | #endif |
| 235 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 236 | if (device & CONSOLE) { |
| 237 | /* Always send console messages to /dev/console so people will see them. */ |
| 238 | if ( |
| 239 | (fd = |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 240 | device_open(_PATH_CONSOLE, O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 241 | va_start(arguments, fmt); |
| 242 | vdprintf(fd, fmt, arguments); |
| 243 | va_end(arguments); |
| 244 | close(fd); |
| 245 | } else { |
| 246 | fprintf(stderr, "Bummer, can't print: "); |
| 247 | va_start(arguments, fmt); |
| 248 | vfprintf(stderr, fmt, arguments); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 249 | va_end(arguments); |
| 250 | } |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 251 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 252 | } |
| 253 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 254 | /* Set terminal settings to reasonable defaults */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 255 | static void set_term(int fd) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 256 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 257 | struct termios tty; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 258 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 259 | tcgetattr(fd, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 260 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 261 | /* set control chars */ |
Eric Andersen | 3849f9b | 2000-07-10 19:56:47 +0000 | [diff] [blame] | 262 | tty.c_cc[VINTR] = 3; /* C-c */ |
| 263 | tty.c_cc[VQUIT] = 28; /* C-\ */ |
| 264 | tty.c_cc[VERASE] = 127; /* C-? */ |
| 265 | tty.c_cc[VKILL] = 21; /* C-u */ |
| 266 | tty.c_cc[VEOF] = 4; /* C-d */ |
| 267 | tty.c_cc[VSTART] = 17; /* C-q */ |
| 268 | tty.c_cc[VSTOP] = 19; /* C-s */ |
| 269 | tty.c_cc[VSUSP] = 26; /* C-z */ |
Eric Andersen | 02bc25b | 2000-07-06 21:29:32 +0000 | [diff] [blame] | 270 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 271 | /* use line dicipline 0 */ |
| 272 | tty.c_line = 0; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 273 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 274 | /* Make it be sane */ |
Erik Andersen | 6c41c44 | 2000-03-19 05:13:49 +0000 | [diff] [blame] | 275 | tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD; |
Eric Andersen | d886292 | 2001-04-23 15:14:11 +0000 | [diff] [blame] | 276 | tty.c_cflag |= CREAD|HUPCL|CLOCAL; |
| 277 | |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 278 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 279 | /* input modes */ |
| 280 | tty.c_iflag = ICRNL | IXON | IXOFF; |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 281 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 282 | /* output modes */ |
| 283 | tty.c_oflag = OPOST | ONLCR; |
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 | /* local modes */ |
| 286 | tty.c_lflag = |
| 287 | ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 288 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 289 | tcsetattr(fd, TCSANOW, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 290 | } |
| 291 | |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 292 | /* How much memory does this machine have? |
| 293 | Units are kBytes to avoid overflow on 4GB machines */ |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 294 | static int check_free_memory(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 295 | { |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 296 | struct sysinfo info; |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 297 | unsigned int result, u, s=10; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 298 | |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 299 | if (sysinfo(&info) != 0) { |
Eric Andersen | 53cfb7e | 2001-01-31 17:29:47 +0000 | [diff] [blame] | 300 | perror_msg("Error checking free memory"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 301 | return -1; |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 302 | } |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 303 | |
| 304 | /* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes. |
| 305 | * Kernels 2.4.0 return info.mem_unit in bytes. */ |
| 306 | u = info.mem_unit; |
| 307 | if (u==0) u=1; |
| 308 | while ( (u&1) == 0 && s > 0 ) { u>>=1; s--; } |
| 309 | result = (info.totalram>>s) + (info.totalswap>>s); |
| 310 | result = result*u; |
| 311 | if (result < 0) result = INT_MAX; |
| 312 | return result; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 313 | } |
| 314 | |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 315 | static void console_init(void) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 316 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 317 | int fd; |
| 318 | int tried_devcons = 0; |
| 319 | int tried_vtprimary = 0; |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 320 | struct vt_stat vt; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 321 | struct serial_struct sr; |
| 322 | char *s; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 323 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 324 | if ((s = getenv("TERM")) != NULL) { |
| 325 | snprintf(termType, sizeof(termType) - 1, "TERM=%s", s); |
| 326 | } |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 327 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 328 | if ((s = getenv("CONSOLE")) != NULL) { |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 329 | safe_strncpy(console, s, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 330 | } |
Eric Andersen | fbb39c8 | 1999-11-08 17:00:52 +0000 | [diff] [blame] | 331 | #if #cpu(sparc) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 332 | /* sparc kernel supports console=tty[ab] parameter which is also |
| 333 | * passed to init, so catch it here */ |
| 334 | else if ((s = getenv("console")) != NULL) { |
| 335 | /* remap tty[ab] to /dev/ttyS[01] */ |
| 336 | if (strcmp(s, "ttya") == 0) |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 337 | safe_strncpy(console, SC_0, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 338 | else if (strcmp(s, "ttyb") == 0) |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 339 | safe_strncpy(console, SC_1, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 340 | } |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 341 | #endif |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 342 | else { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 343 | /* 2.2 kernels: identify the real console backend and try to use it */ |
| 344 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
| 345 | /* this is a serial console */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 346 | snprintf(console, sizeof(console) - 1, SC_FORMAT, sr.line); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 347 | } else if (ioctl(0, VT_GETSTATE, &vt) == 0) { |
| 348 | /* this is linux virtual tty */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 349 | snprintf(console, sizeof(console) - 1, VC_FORMAT, vt.v_active); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 350 | } else { |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 351 | safe_strncpy(console, _PATH_CONSOLE, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 352 | tried_devcons++; |
| 353 | } |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 354 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 355 | |
| 356 | while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) { |
| 357 | /* Can't open selected console -- try /dev/console */ |
| 358 | if (!tried_devcons) { |
| 359 | tried_devcons++; |
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 | continue; |
| 362 | } |
| 363 | /* Can't open selected console -- try vt1 */ |
| 364 | if (!tried_vtprimary) { |
| 365 | tried_vtprimary++; |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 366 | safe_strncpy(console, VC_1, sizeof(console)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 367 | continue; |
| 368 | } |
| 369 | break; |
| 370 | } |
| 371 | if (fd < 0) { |
| 372 | /* Perhaps we should panic here? */ |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 373 | safe_strncpy(console, "/dev/null", sizeof(console)); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 374 | } else { |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame^] | 375 | /* check for serial console */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 376 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
Erik Andersen | fa4718e | 2000-02-21 19:25:12 +0000 | [diff] [blame] | 377 | /* Force the TERM setting to vt102 for serial console -- |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame^] | 378 | * if TERM is set to linux (the default) */ |
Erik Andersen | fa4718e | 2000-02-21 19:25:12 +0000 | [diff] [blame] | 379 | if (strcmp( termType, "TERM=linux" ) == 0) |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 380 | safe_strncpy(termType, "TERM=vt102", sizeof(termType)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 381 | } |
| 382 | close(fd); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 383 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 384 | message(LOG, "console=%s\n", console); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 385 | } |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 386 | |
| 387 | static void fixup_argv(int argc, char **argv, char *new_argv0) |
| 388 | { |
| 389 | int len; |
| 390 | /* Fix up argv[0] to be certain we claim to be init */ |
| 391 | len = strlen(argv[0]); |
| 392 | memset(argv[0], 0, len); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 393 | safe_strncpy(argv[0], new_argv0, len + 1); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 394 | |
| 395 | /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */ |
| 396 | len = 1; |
| 397 | while (argc > len) { |
| 398 | memset(argv[len], 0, strlen(argv[len])); |
| 399 | len++; |
| 400 | } |
| 401 | } |
| 402 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 403 | /* Make sure there is enough memory to do something useful. * |
| 404 | * Calls "swapon -a" if needed so be sure /etc/fstab is present... */ |
| 405 | static void check_memory(void) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 406 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 407 | struct stat statBuf; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 408 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 409 | if (check_free_memory() > 1000) |
| 410 | return; |
| 411 | |
| 412 | #if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) |
| 413 | if (stat("/etc/fstab", &statBuf) == 0) { |
| 414 | /* swapon -a requires /proc typically */ |
| 415 | system("/bin/mount -t proc proc /proc"); |
| 416 | /* Try to turn on swap */ |
| 417 | system("/sbin/swapon -a"); |
| 418 | if (check_free_memory() < 1000) |
| 419 | goto goodnight; |
| 420 | } else |
| 421 | goto goodnight; |
| 422 | return; |
Eric Andersen | 3862423 | 2001-01-25 00:04:16 +0000 | [diff] [blame] | 423 | #endif |
| 424 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 425 | goodnight: |
| 426 | message(CONSOLE, |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 427 | "\rSorry, your computer does not have enough memory.\n"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 428 | loop_forever(); |
| 429 | } |
| 430 | |
| 431 | static pid_t run(struct init_action *a) |
| 432 | { |
| 433 | struct stat sb; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 434 | int i, j, junk; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 435 | pid_t pid, pgrp, tmp_pid; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 436 | char *s, *tmpCmd, *cmd[INIT_BUFFS_SIZE], *cmdpath; |
| 437 | char buf[INIT_BUFFS_SIZE+6]; /* INIT_BUFFS_SIZE+strlen("exec ")+1 */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 438 | sigset_t nmask, omask; |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 439 | char *environment[MAXENV+1] = { |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 440 | termType, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 441 | "HOME=/", |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 442 | "PATH=" _PATH_STDPATH, |
Matt Kraai | 7bd773c | 2001-06-12 20:55:02 +0000 | [diff] [blame] | 443 | "SHELL=" SHELL, |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 444 | "USER=root", |
| 445 | NULL |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 446 | }; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 447 | static const char press_enter[] = |
| 448 | #ifdef CUSTOMIZED_BANNER |
| 449 | #include CUSTOMIZED_BANNER |
| 450 | #endif |
| 451 | "\nPlease press Enter to activate this console. "; |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 452 | |
Eric Andersen | 7f19785 | 2001-03-16 01:14:04 +0000 | [diff] [blame] | 453 | /* inherit environment to the child, merging our values -andy */ |
| 454 | for (i=0; environ[i]; i++) { |
| 455 | for (j=0; environment[j]; j++) { |
| 456 | s = strchr(environment[j], '='); |
| 457 | if (!strncmp(environ[i], environment[j], s - environment[j])) |
| 458 | break; |
| 459 | } |
| 460 | if (!environment[j]) { |
| 461 | environment[j++] = environ[i]; |
| 462 | environment[j] = NULL; |
| 463 | } |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 464 | } |
| 465 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 466 | /* Block sigchild while forking. */ |
| 467 | sigemptyset(&nmask); |
| 468 | sigaddset(&nmask, SIGCHLD); |
| 469 | sigprocmask(SIG_BLOCK, &nmask, &omask); |
| 470 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 471 | if ((pid = fork()) == 0) |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 472 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 473 | /* Clean up */ |
| 474 | close(0); |
| 475 | close(1); |
| 476 | close(2); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 477 | sigprocmask(SIG_SETMASK, &omask, NULL); |
| 478 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 479 | /* Reset signal handlers that were set by the parent process */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 480 | signal(SIGUSR1, SIG_DFL); |
| 481 | signal(SIGUSR2, SIG_DFL); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 482 | signal(SIGINT, SIG_DFL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 483 | signal(SIGTERM, SIG_DFL); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 484 | signal(SIGHUP, SIG_DFL); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 485 | signal(SIGCONT, SIG_DFL); |
| 486 | signal(SIGSTOP, SIG_DFL); |
| 487 | signal(SIGTSTP, SIG_DFL); |
Eric Andersen | 2f6c04f | 1999-11-01 23:59:44 +0000 | [diff] [blame] | 488 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 489 | /* Create a new session and make ourself the process |
| 490 | * group leader for non-interactive jobs */ |
| 491 | if ((a->action & (RESPAWN))==0) |
| 492 | setsid(); |
| 493 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 494 | /* Open the new terminal device */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 495 | if ((device_open(a->terminal, O_RDWR|O_NOCTTY)) < 0) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 496 | if (stat(a->terminal, &sb) != 0) { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 497 | message(LOG | CONSOLE, "\rdevice '%s' does not exist.\n", |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 498 | a->terminal); |
| 499 | _exit(1); |
Eric Andersen | 53f5061 | 2001-03-14 09:01:11 +0000 | [diff] [blame] | 500 | } |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 501 | message(LOG | CONSOLE, "\rBummer, can't open %s\n", a->terminal); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 502 | _exit(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 503 | } |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 504 | |
| 505 | /* Non-interactive jobs should not get a controling tty */ |
| 506 | if ((a->action & (RESPAWN))==0) |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 507 | (void)ioctl(0, TIOCSCTTY, 0); |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 508 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 509 | /* Make sure the terminal will act fairly normal for us */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 510 | set_term(0); |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 511 | /* Setup stdout, stderr for the new process so |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 512 | * they point to the supplied terminal */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 513 | dup(0); |
| 514 | dup(0); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 515 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 516 | /* For interactive jobs, create a new session |
| 517 | * and become the process group leader */ |
| 518 | if ((a->action & (RESPAWN))) |
| 519 | setsid(); |
| 520 | |
| 521 | /* If the init Action requires us to wait, then force the |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 522 | * supplied terminal to be the controlling tty. */ |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 523 | if (a->action & (SYSINIT|WAIT|CTRLALTDEL|SHUTDOWN|RESTART)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 524 | |
| 525 | /* Now fork off another process to just hang around */ |
| 526 | if ((pid = fork()) < 0) { |
| 527 | message(LOG | CONSOLE, "Can't fork!\n"); |
| 528 | _exit(1); |
| 529 | } |
| 530 | |
| 531 | if (pid > 0) { |
| 532 | |
| 533 | /* We are the parent -- wait till the child is done */ |
| 534 | signal(SIGINT, SIG_IGN); |
| 535 | signal(SIGTSTP, SIG_IGN); |
| 536 | signal(SIGQUIT, SIG_IGN); |
| 537 | signal(SIGCHLD, SIG_DFL); |
| 538 | |
| 539 | /* Wait for child to exit */ |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 540 | while ((tmp_pid = waitpid(pid, &junk, 0)) != pid) |
| 541 | ; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 542 | |
| 543 | /* See if stealing the controlling tty back is necessary */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 544 | pgrp = tcgetpgrp(0); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 545 | if (pgrp != getpid()) |
| 546 | _exit(0); |
| 547 | |
| 548 | /* Use a temporary process to steal the controlling tty. */ |
| 549 | if ((pid = fork()) < 0) { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 550 | message(LOG | CONSOLE, "\rCan't fork!\n"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 551 | _exit(1); |
| 552 | } |
| 553 | if (pid == 0) { |
| 554 | setsid(); |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 555 | ioctl(0, TIOCSCTTY, 1); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 556 | _exit(0); |
| 557 | } |
| 558 | while((tmp_pid = waitpid(pid, &junk, 0)) != pid) { |
| 559 | if (tmp_pid < 0 && errno == ECHILD) |
| 560 | break; |
| 561 | } |
| 562 | _exit(0); |
| 563 | } |
| 564 | |
| 565 | /* Now fall though to actually execute things */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 566 | } |
| 567 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 568 | /* See if any special /bin/sh requiring characters are present */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 569 | if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 570 | cmd[0] = SHELL; |
| 571 | cmd[1] = "-c"; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 572 | strcat(strcpy(buf, "exec "), a->command); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 573 | cmd[2] = buf; |
| 574 | cmd[3] = NULL; |
| 575 | } else { |
| 576 | /* Convert command (char*) into cmd (char**, one word per string) */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 577 | strcpy(buf, a->command); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 578 | s = buf; |
| 579 | for (tmpCmd = buf, i = 0; |
| 580 | (tmpCmd = strsep(&s, " \t")) != NULL;) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 581 | if (*tmpCmd != '\0') { |
| 582 | cmd[i] = tmpCmd; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 583 | i++; |
| 584 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 585 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 586 | cmd[i] = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 587 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 588 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 589 | cmdpath = cmd[0]; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 590 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 591 | /* |
| 592 | Interactive shells want to see a dash in argv[0]. This |
| 593 | typically is handled by login, argv will be setup this |
| 594 | way if a dash appears at the front of the command path |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 595 | (like "-/bin/sh"). |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 596 | */ |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 597 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 598 | if (*cmdpath == '-') { |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 599 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 600 | /* skip over the dash */ |
| 601 | ++cmdpath; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 602 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 603 | /* find the last component in the command pathname */ |
| 604 | s = get_last_path_component(cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 605 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 606 | /* make a new argv[0] */ |
| 607 | if ((cmd[0] = malloc(strlen(s)+2)) == NULL) { |
| 608 | message(LOG | CONSOLE, "malloc failed"); |
| 609 | cmd[0] = cmdpath; |
| 610 | } else { |
| 611 | cmd[0][0] = '-'; |
| 612 | strcpy(cmd[0]+1, s); |
| 613 | } |
| 614 | } |
| 615 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 616 | if (a->action & ASKFIRST) { |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 617 | /* |
| 618 | * Save memory by not exec-ing anything large (like a shell) |
| 619 | * before the user wants it. This is critical if swap is not |
| 620 | * enabled and the system has low memory. Generally this will |
| 621 | * be run on the second virtual console, and the first will |
| 622 | * be allowed to start a shell or whatever an init script |
| 623 | * specifies. |
| 624 | */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 625 | messageND(LOG, "Waiting for enter to start '%s' (pid %d, terminal %s)\n", |
| 626 | cmdpath, getpid(), a->terminal); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 627 | write(fileno(stdout), press_enter, sizeof(press_enter) - 1); |
| 628 | getc(stdin); |
| 629 | } |
| 630 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 631 | /* Log the process name and args */ |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 632 | messageND(LOG, "Starting pid %d, console %s: '%s'\n", |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 633 | getpid(), a->terminal, cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 634 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 635 | #if defined CONFIG_FEATURE_INIT_COREDUMPS |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 636 | if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) { |
| 637 | struct rlimit limit; |
| 638 | limit.rlim_cur = RLIM_INFINITY; |
| 639 | limit.rlim_max = RLIM_INFINITY; |
| 640 | setrlimit(RLIMIT_CORE, &limit); |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 641 | } |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 642 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 643 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 644 | /* Now run it. The new program will take over this PID, |
| 645 | * so nothing further in init.c should be run. */ |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 646 | execve(cmdpath, cmd, environment); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 647 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 648 | /* We're still here? Some error happened. */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 649 | message(LOG | CONSOLE, "\rBummer, could not run '%s': %s\n", cmdpath, |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 650 | strerror(errno)); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 651 | _exit(-1); |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 652 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 653 | sigprocmask(SIG_SETMASK, &omask, NULL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 654 | return pid; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 655 | } |
| 656 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 657 | static int waitfor(struct init_action *a) |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 658 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 659 | int pid; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 660 | int status, wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 661 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 662 | pid = run(a); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 663 | while (1) { |
| 664 | wpid = wait(&status); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 665 | if (wpid > 0 && wpid != pid) { |
| 666 | continue; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 667 | } |
| 668 | if (wpid == pid) |
| 669 | break; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 670 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 671 | return wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 672 | } |
| 673 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 674 | /* Run all commands of a particular type */ |
| 675 | static void run_actions(int action) |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 676 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 677 | struct init_action *a, *tmp; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 678 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 679 | for (a = init_action_list; a; a = tmp) { |
| 680 | tmp = a->next; |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 681 | if (a->action == action) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 682 | if (a->action & (SYSINIT|WAIT|CTRLALTDEL|SHUTDOWN|RESTART)) { |
| 683 | waitfor(a); |
| 684 | delete_init_action(a); |
| 685 | } else if (a->action & ONCE) { |
| 686 | run(a); |
| 687 | delete_init_action(a); |
| 688 | } else if (a->action & (RESPAWN|ASKFIRST)) { |
| 689 | /* Only run stuff with pid==0. If they have |
| 690 | * a pid, that means it is still running */ |
| 691 | if (a->pid == 0) { |
| 692 | a->pid = run(a); |
| 693 | } |
| 694 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 695 | } |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 700 | #ifndef DEBUG_INIT |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 701 | static void shutdown_system(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 702 | { |
Eric Andersen | 813d88c | 2001-10-28 22:49:48 +0000 | [diff] [blame] | 703 | sigset_t block_signals; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 704 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 705 | /* first disable all our signals */ |
| 706 | sigemptyset(&block_signals); |
| 707 | sigaddset(&block_signals, SIGHUP); |
| 708 | sigaddset(&block_signals, SIGCHLD); |
| 709 | sigaddset(&block_signals, SIGUSR1); |
| 710 | sigaddset(&block_signals, SIGUSR2); |
| 711 | sigaddset(&block_signals, SIGINT); |
| 712 | sigaddset(&block_signals, SIGTERM); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 713 | sigaddset(&block_signals, SIGCONT); |
| 714 | sigaddset(&block_signals, SIGSTOP); |
| 715 | sigaddset(&block_signals, SIGTSTP); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 716 | sigprocmask(SIG_BLOCK, &block_signals, NULL); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 717 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 718 | /* Allow Ctrl-Alt-Del to reboot system. */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 719 | init_reboot(RB_ENABLE_CAD); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 720 | |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 721 | message(CONSOLE|LOG, "\n\rThe system is going down NOW !!\n"); |
Eric Andersen | cf8c9cf | 1999-11-05 00:31:46 +0000 | [diff] [blame] | 722 | sync(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 723 | |
| 724 | /* Send signals to every process _except_ pid 1 */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 725 | message(CONSOLE|LOG, "\rSending SIGTERM to all processes.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 726 | kill(-1, SIGTERM); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 727 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 728 | sync(); |
| 729 | |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 730 | message(CONSOLE|LOG, "\rSending SIGKILL to all processes.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 731 | kill(-1, SIGKILL); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 732 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 733 | |
Matt Kraai | 8fc364e | 2001-04-12 20:12:16 +0000 | [diff] [blame] | 734 | /* run everything to be run at "shutdown" */ |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 735 | run_actions(SHUTDOWN); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 736 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 737 | sync(); |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 738 | if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 739 | /* bdflush, kupdate not needed for kernels >2.2.11 */ |
| 740 | bdflush(1, 0); |
| 741 | sync(); |
| 742 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 743 | } |
| 744 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 745 | static void exec_signal(int sig) |
| 746 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 747 | struct init_action *a, *tmp; |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 748 | sigset_t unblock_signals; |
| 749 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 750 | for (a = init_action_list; a; a = tmp) { |
| 751 | tmp = a->next; |
| 752 | if (a->action & RESTART) { |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 753 | shutdown_system(); |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 754 | |
| 755 | /* unblock all signals, blocked in shutdown_system() */ |
| 756 | sigemptyset(&unblock_signals); |
| 757 | sigaddset(&unblock_signals, SIGHUP); |
| 758 | sigaddset(&unblock_signals, SIGCHLD); |
| 759 | sigaddset(&unblock_signals, SIGUSR1); |
| 760 | sigaddset(&unblock_signals, SIGUSR2); |
| 761 | sigaddset(&unblock_signals, SIGINT); |
| 762 | sigaddset(&unblock_signals, SIGTERM); |
| 763 | sigaddset(&unblock_signals, SIGCONT); |
| 764 | sigaddset(&unblock_signals, SIGSTOP); |
| 765 | sigaddset(&unblock_signals, SIGTSTP); |
| 766 | sigprocmask(SIG_UNBLOCK, &unblock_signals, NULL); |
| 767 | |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 768 | message(CONSOLE|LOG, "\rTrying to re-exec %s\n", a->command); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 769 | execl(a->command, a->command, NULL); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 770 | |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 771 | message(CONSOLE|LOG, "\rexec of '%s' failed: %s\n", |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 772 | a->command, sys_errlist[errno]); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 773 | sync(); |
| 774 | sleep(2); |
| 775 | init_reboot(RB_HALT_SYSTEM); |
| 776 | loop_forever(); |
| 777 | } |
| 778 | } |
| 779 | } |
| 780 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 781 | static void halt_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 782 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 783 | shutdown_system(); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 784 | message(CONSOLE|LOG, |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 785 | #if #cpu(s390) |
| 786 | /* Seems the s390 console is Wierd(tm). */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 787 | "\rThe system is halted. You may reboot now.\n" |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 788 | #else |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame^] | 789 | "\rThe system is halted. Press Reset or turn off power\n" |
Eric Andersen | f435a91 | 2001-11-20 05:42:57 +0000 | [diff] [blame] | 790 | #endif |
| 791 | ); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 792 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 793 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 794 | /* allow time for last message to reach serial console */ |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 795 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 796 | |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 797 | if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0)) |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 798 | init_reboot(RB_POWER_OFF); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 799 | else |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 800 | init_reboot(RB_HALT_SYSTEM); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 801 | |
| 802 | loop_forever(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 803 | } |
| 804 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 805 | static void reboot_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 806 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 807 | shutdown_system(); |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 808 | message(CONSOLE|LOG, "\rPlease stand by while rebooting the system.\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 809 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 810 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 811 | /* allow time for last message to reach serial console */ |
| 812 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 813 | |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 814 | init_reboot(RB_AUTOBOOT); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 815 | |
| 816 | loop_forever(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 817 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 818 | |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 819 | static void ctrlaltdel_signal(int sig) |
| 820 | { |
| 821 | run_actions(CTRLALTDEL); |
| 822 | } |
| 823 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 824 | /* The SIGSTOP & SIGTSTP handler */ |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 825 | static void stop_handler(int sig) |
| 826 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 827 | int saved_errno = errno; |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 828 | |
| 829 | got_cont = 0; |
| 830 | while(!got_cont) pause(); |
| 831 | got_cont = 0; |
| 832 | errno = saved_errno; |
| 833 | } |
| 834 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 835 | /* The SIGCONT handler */ |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 836 | static void cont_handler(int sig) |
| 837 | { |
| 838 | got_cont = 1; |
| 839 | } |
| 840 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 841 | #endif /* ! DEBUG_INIT */ |
Erik Andersen | de55287 | 2000-01-23 01:34:05 +0000 | [diff] [blame] | 842 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 843 | static void new_init_action(int action, char *command, char *cons) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 844 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 845 | struct init_action *new_action, *a; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 846 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 847 | if (*cons == '\0') |
| 848 | cons = console; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 849 | |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame^] | 850 | /* do not run entries if console device is not available */ |
| 851 | if (access(cons, R_OK|W_OK)) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 852 | return; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 853 | if (strcmp(cons, "/dev/null") == 0 && (action & ASKFIRST)) |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 854 | return; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 855 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 856 | new_action = calloc((size_t) (1), sizeof(struct init_action)); |
| 857 | if (!new_action) { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 858 | message(LOG | CONSOLE, "\rMemory allocation failure\n"); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 859 | loop_forever(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 860 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 861 | |
| 862 | /* Append to the end of the list */ |
| 863 | for (a = init_action_list; a && a->next; a = a->next) ; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 864 | if (a) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 865 | a->next = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 866 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 867 | init_action_list = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 868 | } |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 869 | strcpy(new_action->command, command); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 870 | new_action->action = action; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 871 | strcpy(new_action->terminal, cons); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 872 | new_action->pid = 0; |
| 873 | // message(LOG|CONSOLE, "command='%s' action='%d' terminal='%s'\n", |
| 874 | // new_action->command, new_action->action, new_action->terminal); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 875 | } |
| 876 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 877 | static void delete_init_action(struct init_action * action) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 878 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 879 | struct init_action *a, *b = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 880 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 881 | for (a = init_action_list; a; b = a, a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 882 | if (a == action) { |
| 883 | if (b == NULL) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 884 | init_action_list = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 885 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 886 | b->next = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 887 | } |
| 888 | free(a); |
| 889 | break; |
| 890 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 891 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 892 | } |
| 893 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 894 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 895 | * then parse_inittab() simply adds in some default |
Eric Andersen | 77d9268 | 2001-05-23 20:32:09 +0000 | [diff] [blame] | 896 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 897 | * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | 812d466 | 2000-01-07 18:30:40 +0000 | [diff] [blame] | 898 | * _is_ defined, but /etc/inittab is missing, this |
| 899 | * results in the same set of default behaviors. |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 900 | * */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 901 | static void parse_inittab(void) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 902 | { |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 903 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 904 | FILE *file; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 905 | 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] | 906 | char *id, *runlev, *action, *command, *eol; |
| 907 | const struct init_action_type *a = actions; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 908 | int foundIt; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 909 | |
| 910 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 911 | file = fopen(INITTAB, "r"); |
| 912 | if (file == NULL) { |
| 913 | /* No inittab file -- set up some default behavior */ |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 914 | #endif |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 915 | /* Reboot on Ctrl-Alt-Del */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 916 | new_init_action(CTRLALTDEL, "/sbin/reboot", console); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 917 | /* Umount all filesystems on halt/reboot */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 918 | new_init_action(SHUTDOWN, "/bin/umount -a -r", console); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 919 | #if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 920 | /* Swapoff on halt/reboot */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 921 | new_init_action(SHUTDOWN, "/sbin/swapoff -a", console); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 922 | #endif |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 923 | /* Prepare to restart init when a HUP is received */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 924 | new_init_action(RESTART, "/sbin/init", console); |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame^] | 925 | /* Askfirst shell on tty1-4 */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 926 | new_init_action(ASKFIRST, LOGIN_SHELL, console); |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame^] | 927 | new_init_action(ASKFIRST, LOGIN_SHELL, VC_2); |
| 928 | new_init_action(ASKFIRST, LOGIN_SHELL, VC_3); |
| 929 | new_init_action(ASKFIRST, LOGIN_SHELL, VC_4); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 930 | /* sysinit */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 931 | new_init_action(SYSINIT, INIT_SCRIPT, console); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 932 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 933 | return; |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 934 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 935 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 936 | |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 937 | while (fgets(buf, INIT_BUFFS_SIZE, file) != NULL) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 938 | foundIt = FALSE; |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 939 | /* Skip leading spaces */ |
| 940 | for (id = buf; *id == ' ' || *id == '\t'; id++); |
| 941 | |
| 942 | /* Skip the line if it's a comment */ |
| 943 | if (*id == '#' || *id == '\n') |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 944 | continue; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 945 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 946 | /* Trim the trailing \n */ |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 947 | eol = strrchr(id, '\n'); |
| 948 | if (eol != NULL) |
| 949 | *eol = '\0'; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 950 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 951 | /* Keep a copy around for posterity's sake (and error msgs) */ |
| 952 | strcpy(lineAsRead, buf); |
| 953 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 954 | /* Separate the ID field from the runlevels */ |
| 955 | runlev = strchr(id, ':'); |
| 956 | if (runlev == NULL || *(runlev + 1) == '\0') { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 957 | message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 958 | continue; |
| 959 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 960 | *runlev = '\0'; |
| 961 | ++runlev; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 962 | } |
| 963 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 964 | /* Separate the runlevels from the action */ |
| 965 | action = strchr(runlev, ':'); |
| 966 | if (action == NULL || *(action + 1) == '\0') { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 967 | message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 968 | continue; |
| 969 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 970 | *action = '\0'; |
| 971 | ++action; |
| 972 | } |
| 973 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 974 | /* Separate the action from the command */ |
| 975 | command = strchr(action, ':'); |
| 976 | if (command == NULL || *(command + 1) == '\0') { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 977 | message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 978 | continue; |
| 979 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 980 | *command = '\0'; |
| 981 | ++command; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 982 | } |
| 983 | |
| 984 | /* Ok, now process it */ |
| 985 | a = actions; |
| 986 | while (a->name != 0) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 987 | if (strcmp(a->name, action) == 0) { |
| 988 | if (*id != '\0') { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 989 | strcpy(tmpConsole, "/dev/"); |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 990 | strncat(tmpConsole, id, INIT_BUFFS_SIZE-6); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 991 | id = tmpConsole; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 992 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 993 | new_init_action(a->action, command, id); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 994 | foundIt = TRUE; |
| 995 | } |
| 996 | a++; |
| 997 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 998 | if (foundIt == TRUE) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 999 | continue; |
| 1000 | else { |
| 1001 | /* Choke on an unknown action */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 1002 | message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1003 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 1004 | } |
Eric Andersen | d8636ca | 2002-05-15 22:19:09 +0000 | [diff] [blame] | 1005 | fclose(file); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1006 | return; |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1007 | #endif /* CONFIG_FEATURE_USE_INITTAB */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 1008 | } |
| 1009 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 1010 | |
| 1011 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 1012 | extern int init_main(int argc, char **argv) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1013 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1014 | struct init_action *a; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1015 | pid_t wpid; |
| 1016 | int status; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1017 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 1018 | if (argc > 1 && !strcmp(argv[1], "-q")) { |
Eric Andersen | 467a18b | 2002-01-25 23:13:06 +0000 | [diff] [blame] | 1019 | /* don't assume init's pid == 1 */ |
| 1020 | long *pid = find_pid_by_name("init"); |
| 1021 | if (!pid || *pid<=0) { |
| 1022 | pid = find_pid_by_name("linuxrc"); |
| 1023 | if (!pid || *pid<=0) |
| 1024 | error_msg_and_die("no process killed"); |
| 1025 | } |
| 1026 | kill(*pid, SIGHUP); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 1027 | exit(0); |
| 1028 | } |
| 1029 | |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 1030 | #ifndef DEBUG_INIT |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 1031 | /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */ |
| 1032 | if (getpid() != 1 |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1033 | #ifdef CONFIG_FEATURE_INITRD |
Matt Kraai | e58771e | 2000-07-12 15:38:49 +0000 | [diff] [blame] | 1034 | && strstr(applet_name, "linuxrc") == NULL |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 1035 | #endif |
| 1036 | ) |
| 1037 | { |
Eric Andersen | 67991cf | 2001-02-14 21:23:06 +0000 | [diff] [blame] | 1038 | show_usage(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1039 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1040 | /* Set up sig handlers -- be sure to |
| 1041 | * clear all of these in run() */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1042 | signal(SIGHUP, exec_signal); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1043 | signal(SIGUSR1, halt_signal); |
Eric Andersen | 4c95a28 | 2000-07-07 19:30:28 +0000 | [diff] [blame] | 1044 | signal(SIGUSR2, halt_signal); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1045 | signal(SIGINT, ctrlaltdel_signal); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1046 | signal(SIGTERM, reboot_signal); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 1047 | signal(SIGCONT, cont_handler); |
| 1048 | signal(SIGSTOP, stop_handler); |
| 1049 | signal(SIGTSTP, stop_handler); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1050 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1051 | /* Turn off rebooting via CTL-ALT-DEL -- we get a |
| 1052 | * SIGINT on CAD so we can shut things down gracefully... */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 1053 | init_reboot(RB_DISABLE_CAD); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1054 | #endif |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 1055 | |
Erik Andersen | 298854f | 2000-03-23 01:09:18 +0000 | [diff] [blame] | 1056 | /* Figure out what kernel this is running */ |
| 1057 | kernelVersion = get_kernel_revision(); |
| 1058 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 1059 | /* Figure out where the default console should be */ |
| 1060 | console_init(); |
| 1061 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1062 | /* Close whatever files are open, and reset the console. */ |
| 1063 | close(0); |
| 1064 | close(1); |
| 1065 | close(2); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 1066 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 1067 | if(device_open(console, O_RDWR|O_NOCTTY)==0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1068 | set_term(0); |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 1069 | close(0); |
| 1070 | } |
| 1071 | |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1072 | chdir("/"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1073 | setsid(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1074 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1075 | /* Make sure PATH is set to something sane */ |
Eric Andersen | 452fd33 | 2001-03-04 06:47:33 +0000 | [diff] [blame] | 1076 | putenv("PATH="_PATH_STDPATH); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1077 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1078 | /* Hello world */ |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 1079 | message(MAYBE_CONSOLE|LOG, "\rinit started: %s\n", full_version); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1080 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1081 | /* Make sure there is enough memory to do something useful. */ |
| 1082 | check_memory(); |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 1083 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1084 | /* Check if we are supposed to be in single user mode */ |
| 1085 | if (argc > 1 && (!strcmp(argv[1], "single") || |
| 1086 | !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) { |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 1087 | /* Ask first then start a shell on tty2-4 */ |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame^] | 1088 | new_init_action(ASKFIRST, LOGIN_SHELL, VC_2); |
| 1089 | new_init_action(ASKFIRST, LOGIN_SHELL, VC_3); |
| 1090 | new_init_action(ASKFIRST, LOGIN_SHELL, VC_4); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1091 | /* Start a shell on tty1 */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1092 | new_init_action(RESPAWN, LOGIN_SHELL, console); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1093 | } else { |
| 1094 | /* Not in single user mode -- see what inittab says */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 1095 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1096 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1097 | * then parse_inittab() simply adds in some default |
Eric Andersen | 77d9268 | 2001-05-23 20:32:09 +0000 | [diff] [blame] | 1098 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1099 | * of "askfirst" shells */ |
| 1100 | parse_inittab(); |
Eric Andersen | d00c262 | 1999-12-07 08:37:31 +0000 | [diff] [blame] | 1101 | } |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1102 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 1103 | /* Make the command line just say "init" -- thats all, nothing else */ |
| 1104 | fixup_argv(argc, argv, "init"); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 1105 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1106 | /* Now run everything that needs to be run */ |
| 1107 | |
| 1108 | /* First run the sysinit command */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1109 | run_actions(SYSINIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1110 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1111 | /* Next run anything that wants to block */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1112 | run_actions(WAIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1113 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1114 | /* Next run anything to be run only once */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1115 | run_actions(ONCE); |
| 1116 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1117 | /* If there is nothing else to do, stop */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1118 | if (init_action_list == NULL) { |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 1119 | message(LOG | CONSOLE, "\rNo more tasks for init -- sleeping forever.\n"); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 1120 | loop_forever(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1121 | } |
| 1122 | |
| 1123 | /* Now run the looping stuff for the rest of forever */ |
| 1124 | while (1) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1125 | /* run the respawn stuff */ |
| 1126 | run_actions(RESPAWN); |
| 1127 | |
| 1128 | /* run the askfirst stuff */ |
| 1129 | run_actions(ASKFIRST); |
| 1130 | |
| 1131 | /* Don't consume all CPU time -- sleep a bit */ |
| 1132 | sleep(1); |
| 1133 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1134 | /* Wait for a child process to exit */ |
| 1135 | wpid = wait(&status); |
| 1136 | if (wpid > 0) { |
| 1137 | /* Find out who died and clean up their corpse */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1138 | for (a = init_action_list; a; a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1139 | if (a->pid == wpid) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1140 | /* Set the pid to 0 so that the process gets |
| 1141 | * restarted by run_actions() */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1142 | a->pid = 0; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1143 | message(LOG, "Process '%s' (pid %d) exited. " |
| 1144 | "Scheduling it for restart.\n", a->command, wpid); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1145 | } |
| 1146 | } |
| 1147 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1148 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1149 | } |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 1150 | |
| 1151 | /* |
| 1152 | Local Variables: |
| 1153 | c-file-style: "linux" |
| 1154 | c-basic-offset: 4 |
| 1155 | tab-width: 4 |
| 1156 | End: |
| 1157 | */ |