Erik Andersen | ccc7488 | 2000-01-27 02:40:21 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Mini init implementation for busybox |
| 4 | * |
| 5 | * |
| 6 | * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>. |
| 7 | * Adjusted by so many folks, it's impossible to keep track. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | * |
| 23 | */ |
| 24 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 25 | /* Turn this on to disable all the dangerous |
| 26 | rebooting stuff when debugging. |
| 27 | #define DEBUG_INIT |
| 28 | */ |
| 29 | |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 30 | #include <stdio.h> |
| 31 | #include <stdlib.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 32 | #include <errno.h> |
Eric Andersen | b186d98 | 1999-12-03 09:19:54 +0000 | [diff] [blame] | 33 | #include <paths.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 34 | #include <signal.h> |
| 35 | #include <stdarg.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 36 | #include <string.h> |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 37 | #include <termios.h> |
| 38 | #include <unistd.h> |
Eric Andersen | ed3ef50 | 2001-01-27 08:24:39 +0000 | [diff] [blame] | 39 | #include <limits.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 40 | #include <sys/fcntl.h> |
| 41 | #include <sys/ioctl.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 42 | #include <sys/mount.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 43 | #include <sys/types.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 44 | #include <sys/wait.h> |
Eric Andersen | cbe31da | 2001-02-20 06:14:08 +0000 | [diff] [blame] | 45 | #include "busybox.h" |
| 46 | #define bb_need_full_version |
| 47 | #define BB_DECLARE_EXTERN |
| 48 | #include "messages.c" |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 49 | #ifdef BB_SYSLOGD |
| 50 | # include <sys/syslog.h> |
| 51 | #endif |
| 52 | |
Pavel Roskin | 9c5fcc3 | 2000-07-17 23:45:12 +0000 | [diff] [blame] | 53 | |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 54 | /* From <linux/vt.h> */ |
| 55 | struct vt_stat { |
| 56 | unsigned short v_active; /* active vt */ |
| 57 | unsigned short v_signal; /* signal to send */ |
| 58 | unsigned short v_state; /* vt bitmask */ |
| 59 | }; |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 60 | static const int VT_GETSTATE = 0x5603; /* get global vt state info */ |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 61 | |
| 62 | /* From <linux/serial.h> */ |
| 63 | struct serial_struct { |
| 64 | int type; |
| 65 | int line; |
| 66 | int port; |
| 67 | int irq; |
| 68 | int flags; |
| 69 | int xmit_fifo_size; |
| 70 | int custom_divisor; |
| 71 | int baud_base; |
| 72 | unsigned short close_delay; |
| 73 | char reserved_char[2]; |
| 74 | int hub6; |
| 75 | unsigned short closing_wait; /* time to wait before closing */ |
| 76 | unsigned short closing_wait2; /* no longer used... */ |
| 77 | int reserved[4]; |
| 78 | }; |
| 79 | |
| 80 | |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 81 | |
| 82 | #ifndef RB_HALT_SYSTEM |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 83 | static const int RB_HALT_SYSTEM = 0xcdef0123; |
| 84 | static const int RB_ENABLE_CAD = 0x89abcdef; |
| 85 | static const int RB_DISABLE_CAD = 0; |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 86 | #define RB_POWER_OFF 0x4321fedc |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 87 | static const int RB_AUTOBOOT = 0x01234567; |
Eric Andersen | e3a48d8 | 2000-12-12 23:22:35 +0000 | [diff] [blame] | 88 | #if defined(__GLIBC__) || defined (__UCLIBC__) |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 89 | #include <sys/reboot.h> |
| 90 | #define init_reboot(magic) reboot(magic) |
| 91 | #else |
| 92 | #define init_reboot(magic) reboot(0xfee1dead, 672274793, magic) |
| 93 | #endif |
| 94 | #endif |
| 95 | |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 96 | #ifndef _PATH_STDPATH |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 97 | #define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin" |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 98 | #endif |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 99 | |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 100 | |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 101 | #if defined BB_FEATURE_INIT_COREDUMPS |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 102 | /* |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 103 | * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called |
| 104 | * before processes are spawned to set core file size as unlimited. |
| 105 | * This is for debugging only. Don't use this is production, unless |
| 106 | * you want core dumps lying about.... |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 107 | */ |
| 108 | #define CORE_ENABLE_FLAG_FILE "/.init_enable_core" |
| 109 | #include <sys/resource.h> |
| 110 | #include <sys/time.h> |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 111 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 112 | |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 113 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 114 | |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 115 | #if defined(__GLIBC__) |
| 116 | #include <sys/kdaemon.h> |
| 117 | #else |
Eric Andersen | ed3ef50 | 2001-01-27 08:24:39 +0000 | [diff] [blame] | 118 | #include <sys/syscall.h> |
| 119 | #include <linux/unistd.h> |
Eric Andersen | a15cd0b | 2000-06-19 18:14:20 +0000 | [diff] [blame] | 120 | static _syscall2(int, bdflush, int, func, int, data); |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 121 | #endif /* __GLIBC__ */ |
| 122 | |
Eric Andersen | 0ecb54a | 1999-12-05 23:24:55 +0000 | [diff] [blame] | 123 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 124 | #define VT_PRIMARY "/dev/tty1" /* Primary virtual console */ |
| 125 | #define VT_SECONDARY "/dev/tty2" /* Virtual console */ |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 126 | #define VT_THIRD "/dev/tty3" /* Virtual console */ |
| 127 | #define VT_FOURTH "/dev/tty4" /* Virtual console */ |
| 128 | #define VT_LOG "/dev/tty5" /* Virtual console */ |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 129 | #define SERIAL_CON0 "/dev/ttyS0" /* Primary serial console */ |
| 130 | #define SERIAL_CON1 "/dev/ttyS1" /* Serial console */ |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 131 | #define SHELL "-/bin/sh" /* Default shell */ |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 132 | #define INITTAB "/etc/inittab" /* inittab file location */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 133 | #ifndef INIT_SCRIPT |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 134 | #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 135 | #endif |
Erik Andersen | 9c88cac | 1999-12-30 09:25:17 +0000 | [diff] [blame] | 136 | |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 137 | #define MAXENV 16 /* Number of env. vars */ |
| 138 | //static const int MAXENV = 16; /* Number of env. vars */ |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame] | 139 | static const int LOG = 0x1; |
| 140 | static const int CONSOLE = 0x2; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 141 | |
| 142 | /* Allowed init action types */ |
| 143 | typedef enum { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 144 | SYSINIT = 1, |
| 145 | RESPAWN, |
| 146 | ASKFIRST, |
| 147 | WAIT, |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 148 | ONCE, |
| 149 | CTRLALTDEL |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 150 | } initActionEnum; |
| 151 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 152 | /* A mapping between "inittab" action name strings and action type codes. */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 153 | typedef struct initActionType { |
| 154 | const char *name; |
| 155 | initActionEnum action; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 156 | } initActionType; |
| 157 | |
| 158 | static const struct initActionType actions[] = { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 159 | {"sysinit", SYSINIT}, |
| 160 | {"respawn", RESPAWN}, |
| 161 | {"askfirst", ASKFIRST}, |
| 162 | {"wait", WAIT}, |
| 163 | {"once", ONCE}, |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 164 | {"ctrlaltdel", CTRLALTDEL}, |
Pavel Roskin | 9027bcf | 2000-07-14 15:44:25 +0000 | [diff] [blame] | 165 | {0, 0} |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 166 | }; |
| 167 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 168 | /* Set up a linked list of initActions, to be read from inittab */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 169 | typedef struct initActionTag initAction; |
| 170 | struct initActionTag { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 171 | pid_t pid; |
| 172 | char process[256]; |
| 173 | char console[256]; |
| 174 | initAction *nextPtr; |
| 175 | initActionEnum action; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 176 | }; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 177 | initAction *initActionList = NULL; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 178 | |
| 179 | |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 180 | static char *secondConsole = VT_SECONDARY; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 181 | static char *thirdConsole = VT_THIRD; |
| 182 | static char *fourthConsole = VT_FOURTH; |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 183 | static char *log = VT_LOG; |
| 184 | static int kernelVersion = 0; |
| 185 | static char termType[32] = "TERM=linux"; |
| 186 | static char console[32] = _PATH_CONSOLE; |
| 187 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 188 | static void delete_initAction(initAction * action); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 189 | |
| 190 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 191 | /* Print a message to the specified device. |
| 192 | * Device may be bitwise-or'd from LOG | CONSOLE */ |
| 193 | static void message(int device, char *fmt, ...) |
Erik Andersen | 93d6513 | 2000-04-06 08:06:36 +0000 | [diff] [blame] | 194 | __attribute__ ((format (printf, 2, 3))); |
| 195 | static void message(int device, char *fmt, ...) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 196 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 197 | va_list arguments; |
| 198 | int fd; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 199 | |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 200 | #ifdef BB_SYSLOGD |
| 201 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 202 | /* Log the message to syslogd */ |
| 203 | if (device & LOG) { |
| 204 | char msg[1024]; |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 205 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 206 | va_start(arguments, fmt); |
| 207 | vsnprintf(msg, sizeof(msg), fmt, arguments); |
| 208 | va_end(arguments); |
Eric Andersen | 53cfb7e | 2001-01-31 17:29:47 +0000 | [diff] [blame] | 209 | openlog(applet_name, 0, LOG_USER); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 210 | syslog(LOG_USER|LOG_INFO, msg); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 211 | closelog(); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 212 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 213 | #else |
| 214 | static int log_fd = -1; |
| 215 | |
| 216 | /* Take full control of the log tty, and never close it. |
| 217 | * It's mine, all mine! Muhahahaha! */ |
| 218 | if (log_fd < 0) { |
| 219 | if (log == NULL) { |
| 220 | /* don't even try to log, because there is no such console */ |
| 221 | log_fd = -2; |
| 222 | /* log to main console instead */ |
| 223 | device = CONSOLE; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 224 | } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) { |
| 225 | log_fd = -2; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 226 | fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 227 | log = NULL; |
| 228 | device = CONSOLE; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 229 | } |
| 230 | } |
| 231 | if ((device & LOG) && (log_fd >= 0)) { |
| 232 | va_start(arguments, fmt); |
| 233 | vdprintf(log_fd, fmt, arguments); |
| 234 | va_end(arguments); |
| 235 | } |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 236 | #endif |
| 237 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 238 | if (device & CONSOLE) { |
| 239 | /* Always send console messages to /dev/console so people will see them. */ |
| 240 | if ( |
| 241 | (fd = |
| 242 | device_open(_PATH_CONSOLE, |
| 243 | O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) { |
| 244 | va_start(arguments, fmt); |
| 245 | vdprintf(fd, fmt, arguments); |
| 246 | va_end(arguments); |
| 247 | close(fd); |
| 248 | } else { |
| 249 | fprintf(stderr, "Bummer, can't print: "); |
| 250 | va_start(arguments, fmt); |
| 251 | vfprintf(stderr, fmt, arguments); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 252 | va_end(arguments); |
| 253 | } |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 254 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 255 | } |
| 256 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 257 | /* Set terminal settings to reasonable defaults */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 258 | void set_term(int fd) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 259 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 260 | struct termios tty; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 261 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 262 | tcgetattr(fd, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 263 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 264 | /* set control chars */ |
Eric Andersen | 3849f9b | 2000-07-10 19:56:47 +0000 | [diff] [blame] | 265 | tty.c_cc[VINTR] = 3; /* C-c */ |
| 266 | tty.c_cc[VQUIT] = 28; /* C-\ */ |
| 267 | tty.c_cc[VERASE] = 127; /* C-? */ |
| 268 | tty.c_cc[VKILL] = 21; /* C-u */ |
| 269 | tty.c_cc[VEOF] = 4; /* C-d */ |
| 270 | tty.c_cc[VSTART] = 17; /* C-q */ |
| 271 | tty.c_cc[VSTOP] = 19; /* C-s */ |
| 272 | tty.c_cc[VSUSP] = 26; /* C-z */ |
Eric Andersen | 02bc25b | 2000-07-06 21:29:32 +0000 | [diff] [blame] | 273 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 274 | /* use line dicipline 0 */ |
| 275 | tty.c_line = 0; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 276 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 277 | /* Make it be sane */ |
Erik Andersen | 6c41c44 | 2000-03-19 05:13:49 +0000 | [diff] [blame] | 278 | tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD; |
| 279 | tty.c_cflag |= HUPCL|CLOCAL; |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 280 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 281 | /* input modes */ |
| 282 | tty.c_iflag = ICRNL | IXON | IXOFF; |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 283 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 284 | /* output modes */ |
| 285 | tty.c_oflag = OPOST | ONLCR; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 286 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 287 | /* local modes */ |
| 288 | tty.c_lflag = |
| 289 | ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 290 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 291 | tcsetattr(fd, TCSANOW, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 292 | } |
| 293 | |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 294 | /* How much memory does this machine have? |
| 295 | Units are kBytes to avoid overflow on 4GB machines */ |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 296 | static int check_free_memory() |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 297 | { |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 298 | struct sysinfo info; |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 299 | unsigned int result, u, s=10; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 300 | |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 301 | if (sysinfo(&info) != 0) { |
Eric Andersen | 53cfb7e | 2001-01-31 17:29:47 +0000 | [diff] [blame] | 302 | perror_msg("Error checking free memory"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 303 | return -1; |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 304 | } |
Eric Andersen | bc5941a | 2000-12-06 23:17:37 +0000 | [diff] [blame] | 305 | |
| 306 | /* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes. |
| 307 | * Kernels 2.4.0 return info.mem_unit in bytes. */ |
| 308 | u = info.mem_unit; |
| 309 | if (u==0) u=1; |
| 310 | while ( (u&1) == 0 && s > 0 ) { u>>=1; s--; } |
| 311 | result = (info.totalram>>s) + (info.totalswap>>s); |
| 312 | result = result*u; |
| 313 | if (result < 0) result = INT_MAX; |
| 314 | return result; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 315 | } |
| 316 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 317 | static void console_init() |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 318 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 319 | int fd; |
| 320 | int tried_devcons = 0; |
| 321 | int tried_vtprimary = 0; |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 322 | struct vt_stat vt; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 323 | struct serial_struct sr; |
| 324 | char *s; |
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 | if ((s = getenv("TERM")) != NULL) { |
| 327 | snprintf(termType, sizeof(termType) - 1, "TERM=%s", s); |
| 328 | } |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 329 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 330 | if ((s = getenv("CONSOLE")) != NULL) { |
| 331 | snprintf(console, sizeof(console) - 1, "%s", s); |
| 332 | } |
Eric Andersen | fbb39c8 | 1999-11-08 17:00:52 +0000 | [diff] [blame] | 333 | #if #cpu(sparc) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 334 | /* sparc kernel supports console=tty[ab] parameter which is also |
| 335 | * passed to init, so catch it here */ |
| 336 | else if ((s = getenv("console")) != NULL) { |
| 337 | /* remap tty[ab] to /dev/ttyS[01] */ |
| 338 | if (strcmp(s, "ttya") == 0) |
| 339 | snprintf(console, sizeof(console) - 1, "%s", SERIAL_CON0); |
| 340 | else if (strcmp(s, "ttyb") == 0) |
| 341 | snprintf(console, sizeof(console) - 1, "%s", SERIAL_CON1); |
| 342 | } |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 343 | #endif |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 344 | else { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 345 | /* 2.2 kernels: identify the real console backend and try to use it */ |
| 346 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
| 347 | /* this is a serial console */ |
| 348 | snprintf(console, sizeof(console) - 1, "/dev/ttyS%d", sr.line); |
| 349 | } else if (ioctl(0, VT_GETSTATE, &vt) == 0) { |
| 350 | /* this is linux virtual tty */ |
| 351 | snprintf(console, sizeof(console) - 1, "/dev/tty%d", |
| 352 | vt.v_active); |
| 353 | } else { |
| 354 | snprintf(console, sizeof(console) - 1, "%s", _PATH_CONSOLE); |
| 355 | tried_devcons++; |
| 356 | } |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 357 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 358 | |
| 359 | while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) { |
| 360 | /* Can't open selected console -- try /dev/console */ |
| 361 | if (!tried_devcons) { |
| 362 | tried_devcons++; |
| 363 | snprintf(console, sizeof(console) - 1, "%s", _PATH_CONSOLE); |
| 364 | continue; |
| 365 | } |
| 366 | /* Can't open selected console -- try vt1 */ |
| 367 | if (!tried_vtprimary) { |
| 368 | tried_vtprimary++; |
| 369 | snprintf(console, sizeof(console) - 1, "%s", VT_PRIMARY); |
| 370 | continue; |
| 371 | } |
| 372 | break; |
| 373 | } |
| 374 | if (fd < 0) { |
| 375 | /* Perhaps we should panic here? */ |
| 376 | snprintf(console, sizeof(console) - 1, "/dev/null"); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 377 | } else { |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 378 | /* check for serial console and disable logging to tty5 & running a |
| 379 | * shell to tty2-4 */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 380 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 381 | log = NULL; |
| 382 | secondConsole = NULL; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 383 | thirdConsole = NULL; |
| 384 | fourthConsole = NULL; |
Erik Andersen | fa4718e | 2000-02-21 19:25:12 +0000 | [diff] [blame] | 385 | /* Force the TERM setting to vt102 for serial console -- |
| 386 | * iff TERM is set to linux (the default) */ |
| 387 | if (strcmp( termType, "TERM=linux" ) == 0) |
| 388 | snprintf(termType, sizeof(termType) - 1, "TERM=vt102"); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 389 | message(LOG | CONSOLE, |
| 390 | "serial console detected. Disabling virtual terminals.\r\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 391 | } |
| 392 | close(fd); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 393 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 394 | message(LOG, "console=%s\n", console); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 395 | } |
| 396 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 397 | static pid_t run(char *command, char *terminal, int get_enter) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 398 | { |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 399 | int i=0, j=0; |
| 400 | int fd; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 401 | pid_t pid; |
| 402 | char *tmpCmd; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 403 | char *cmd[255], *cmdpath; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 404 | char buf[255]; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 405 | static const char press_enter[] = |
| 406 | |
Eric Andersen | 3862423 | 2001-01-25 00:04:16 +0000 | [diff] [blame] | 407 | #ifdef CUSTOMIZED_BANNER |
| 408 | #include CUSTOMIZED_BANNER |
| 409 | #endif |
| 410 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 411 | "\nPlease press Enter to activate this console. "; |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 412 | char *environment[MAXENV+1] = { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 413 | "HOME=/", |
| 414 | "PATH=/usr/bin:/bin:/usr/sbin:/sbin", |
| 415 | "SHELL=/bin/sh", |
| 416 | termType, |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 417 | "USER=root" |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 418 | }; |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 419 | |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 420 | while (environment[i]) i++; |
| 421 | while ((environ[j]) && (i < MAXENV)) { |
| 422 | if (strncmp(environ[j], "TERM=", 5)) |
| 423 | environment[i++] = environ[j]; |
Eric Andersen | 477aedd | 2001-02-20 18:01:50 +0000 | [diff] [blame] | 424 | j++; |
| 425 | } |
| 426 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 427 | if ((pid = fork()) == 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 428 | /* Clean up */ |
Eric Andersen | fb6a508 | 2000-09-13 16:15:29 +0000 | [diff] [blame] | 429 | ioctl(0, TIOCNOTTY, 0); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 430 | close(0); |
| 431 | close(1); |
| 432 | close(2); |
| 433 | setsid(); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 434 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 435 | /* Reset signal handlers set for parent process */ |
| 436 | signal(SIGUSR1, SIG_DFL); |
| 437 | signal(SIGUSR2, SIG_DFL); |
| 438 | signal(SIGINT, SIG_DFL); |
| 439 | signal(SIGTERM, SIG_DFL); |
| 440 | signal(SIGHUP, SIG_DFL); |
Eric Andersen | 2f6c04f | 1999-11-01 23:59:44 +0000 | [diff] [blame] | 441 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 442 | if ((fd = device_open(terminal, O_RDWR)) < 0) { |
| 443 | message(LOG | CONSOLE, "Bummer, can't open %s\r\n", terminal); |
| 444 | exit(1); |
| 445 | } |
| 446 | dup2(fd, 0); |
| 447 | dup2(fd, 1); |
| 448 | dup2(fd, 2); |
Eric Andersen | fb6a508 | 2000-09-13 16:15:29 +0000 | [diff] [blame] | 449 | ioctl(0, TIOCSCTTY, 1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 450 | tcsetpgrp(0, getpgrp()); |
| 451 | set_term(0); |
| 452 | |
| 453 | if (get_enter == TRUE) { |
| 454 | /* |
| 455 | * Save memory by not exec-ing anything large (like a shell) |
| 456 | * before the user wants it. This is critical if swap is not |
| 457 | * enabled and the system has low memory. Generally this will |
| 458 | * be run on the second virtual console, and the first will |
| 459 | * be allowed to start a shell or whatever an init script |
| 460 | * specifies. |
| 461 | */ |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 462 | #ifdef DEBUG_INIT |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 463 | message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n", |
Eric Andersen | dbcd8ce | 2001-02-22 04:55:33 +0000 | [diff] [blame] | 464 | command, getpid(), terminal); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 465 | #endif |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 466 | write(fileno(stdout), press_enter, sizeof(press_enter) - 1); |
Pavel Roskin | cbe05e4 | 2000-09-14 22:47:29 +0000 | [diff] [blame] | 467 | getc(stdin); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 468 | } |
| 469 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 470 | #ifdef DEBUG_INIT |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 471 | /* Log the process name and args */ |
| 472 | message(LOG, "Starting pid %d, console %s: '%s'\r\n", |
Eric Andersen | dbcd8ce | 2001-02-22 04:55:33 +0000 | [diff] [blame] | 473 | getpid(), terminal, command); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 474 | #endif |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 475 | |
| 476 | /* See if any special /bin/sh requiring characters are present */ |
| 477 | if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { |
| 478 | cmd[0] = SHELL; |
| 479 | cmd[1] = "-c"; |
| 480 | strcpy(buf, "exec "); |
| 481 | strncat(buf, command, sizeof(buf) - strlen(buf) - 1); |
| 482 | cmd[2] = buf; |
| 483 | cmd[3] = NULL; |
| 484 | } else { |
| 485 | /* Convert command (char*) into cmd (char**, one word per string) */ |
| 486 | for (tmpCmd = command, i = 0; |
| 487 | (tmpCmd = strsep(&command, " \t")) != NULL;) { |
| 488 | if (*tmpCmd != '\0') { |
| 489 | cmd[i] = tmpCmd; |
| 490 | tmpCmd++; |
| 491 | i++; |
| 492 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 493 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 494 | cmd[i] = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 495 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 496 | |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 497 | cmdpath = cmd[0]; |
| 498 | |
| 499 | /* |
| 500 | Interactive shells want to see a dash in argv[0]. This |
| 501 | typically is handled by login, argv will be setup this |
| 502 | way if a dash appears at the front of the command path |
| 503 | (like "-/bin/sh"). |
| 504 | */ |
| 505 | |
| 506 | if (*cmdpath == '-') { |
| 507 | char *s; |
| 508 | |
| 509 | /* skip over the dash */ |
| 510 | ++cmdpath; |
| 511 | |
| 512 | /* find the last component in the command pathname */ |
| 513 | s = get_last_path_component(cmdpath); |
| 514 | |
| 515 | /* make a new argv[0] */ |
| 516 | if ((cmd[0] = malloc(strlen(s)+2)) == NULL) { |
| 517 | message(LOG | CONSOLE, "malloc failed"); |
| 518 | cmd[0] = cmdpath; |
| 519 | } else { |
| 520 | cmd[0][0] = '-'; |
| 521 | strcpy(cmd[0]+1, s); |
| 522 | } |
| 523 | } |
| 524 | |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 525 | #if defined BB_FEATURE_INIT_COREDUMPS |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 526 | { |
| 527 | struct stat sb; |
| 528 | if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) { |
| 529 | struct rlimit limit; |
| 530 | limit.rlim_cur = RLIM_INFINITY; |
| 531 | limit.rlim_max = RLIM_INFINITY; |
| 532 | setrlimit(RLIMIT_CORE, &limit); |
| 533 | } |
| 534 | } |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 535 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 536 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 537 | /* Now run it. The new program will take over this PID, |
| 538 | * so nothing further in init.c should be run. */ |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 539 | execve(cmdpath, cmd, environment); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 540 | |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 541 | /* We're still here? Some error happened. */ |
| 542 | message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath, |
| 543 | strerror(errno)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 544 | exit(-1); |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 545 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 546 | return pid; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 547 | } |
| 548 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 549 | static int waitfor(char *command, char *terminal, int get_enter) |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 550 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 551 | int status, wpid; |
| 552 | int pid = run(command, terminal, get_enter); |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 553 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 554 | while (1) { |
| 555 | wpid = wait(&status); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 556 | if (wpid > 0 && wpid != pid) { |
| 557 | continue; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 558 | } |
| 559 | if (wpid == pid) |
| 560 | break; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 561 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 562 | return wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 563 | } |
| 564 | |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 565 | /* Make sure there is enough memory to do something useful. * |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 566 | * Calls "swapon -a" if needed so be sure /etc/fstab is present... */ |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 567 | static void check_memory() |
| 568 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 569 | struct stat statBuf; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 570 | |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 571 | if (check_free_memory() > 1000) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 572 | return; |
| 573 | |
| 574 | if (stat("/etc/fstab", &statBuf) == 0) { |
Erik Andersen | 61677fe | 2000-04-13 01:18:56 +0000 | [diff] [blame] | 575 | /* swapon -a requires /proc typically */ |
| 576 | waitfor("mount proc /proc -t proc", console, FALSE); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 577 | /* Try to turn on swap */ |
Erik Andersen | 61677fe | 2000-04-13 01:18:56 +0000 | [diff] [blame] | 578 | waitfor("swapon -a", console, FALSE); |
Erik Andersen | d07ee46 | 2000-02-21 21:26:32 +0000 | [diff] [blame] | 579 | if (check_free_memory() < 1000) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 580 | goto goodnight; |
| 581 | } else |
| 582 | goto goodnight; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 583 | return; |
| 584 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 585 | goodnight: |
| 586 | message(CONSOLE, |
| 587 | "Sorry, your computer does not have enough memory.\r\n"); |
| 588 | while (1) |
| 589 | sleep(1); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 590 | } |
| 591 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 592 | /* Run all commands to be run right before halt/reboot */ |
| 593 | static void run_lastAction(void) |
| 594 | { |
| 595 | initAction *a; |
| 596 | for (a = initActionList; a; a = a->nextPtr) { |
| 597 | if (a->action == CTRLALTDEL) { |
| 598 | waitfor(a->process, a->console, FALSE); |
| 599 | delete_initAction(a); |
| 600 | } |
| 601 | } |
| 602 | } |
| 603 | |
| 604 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 605 | #ifndef DEBUG_INIT |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 606 | static void shutdown_system(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 607 | { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 608 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 609 | /* first disable our SIGHUP signal */ |
| 610 | signal(SIGHUP, SIG_DFL); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 611 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 612 | /* Allow Ctrl-Alt-Del to reboot system. */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 613 | init_reboot(RB_ENABLE_CAD); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 614 | |
| 615 | message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n"); |
Eric Andersen | cf8c9cf | 1999-11-05 00:31:46 +0000 | [diff] [blame] | 616 | sync(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 617 | |
| 618 | /* Send signals to every process _except_ pid 1 */ |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 619 | message(CONSOLE|LOG, "Sending SIGTERM to all processes.\r\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 620 | kill(-1, SIGTERM); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 621 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 622 | sync(); |
| 623 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 624 | message(CONSOLE|LOG, "Sending SIGKILL to all processes.\r\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 625 | kill(-1, SIGKILL); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 626 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 627 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 628 | /* run everything to be run at "ctrlaltdel" */ |
| 629 | run_lastAction(); |
| 630 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 631 | sync(); |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 632 | if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 633 | /* bdflush, kupdate not needed for kernels >2.2.11 */ |
| 634 | bdflush(1, 0); |
| 635 | sync(); |
| 636 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 637 | } |
| 638 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 639 | static void halt_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 640 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 641 | shutdown_system(); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 642 | message(CONSOLE|LOG, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 643 | "The system is halted. Press %s or turn off power\r\n", |
| 644 | (secondConsole == NULL) /* serial console */ |
| 645 | ? "Reset" : "CTRL-ALT-DEL"); |
| 646 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 647 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 648 | /* allow time for last message to reach serial console */ |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 649 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 650 | |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 651 | if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0)) |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 652 | init_reboot(RB_POWER_OFF); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 653 | else |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 654 | init_reboot(RB_HALT_SYSTEM); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 655 | exit(0); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 656 | } |
| 657 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 658 | static void reboot_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 659 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 660 | shutdown_system(); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 661 | message(CONSOLE|LOG, "Please stand by while rebooting the system.\r\n"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 662 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 663 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 664 | /* allow time for last message to reach serial console */ |
| 665 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 666 | |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 667 | init_reboot(RB_AUTOBOOT); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 668 | exit(0); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 669 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 670 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 671 | #endif /* ! DEBUG_INIT */ |
Erik Andersen | de55287 | 2000-01-23 01:34:05 +0000 | [diff] [blame] | 672 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 673 | void new_initAction(initActionEnum action, char *process, char *cons) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 674 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 675 | initAction *newAction; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 676 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 677 | if (*cons == '\0') |
| 678 | cons = console; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 679 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 680 | /* If BusyBox detects that a serial console is in use, |
| 681 | * then entries not refering to the console or null devices will _not_ be run. |
| 682 | * The exception to this rule is the null device. |
| 683 | */ |
| 684 | if (secondConsole == NULL && strcmp(cons, console) |
| 685 | && strcmp(cons, "/dev/null")) |
| 686 | return; |
| 687 | |
| 688 | newAction = calloc((size_t) (1), sizeof(initAction)); |
| 689 | if (!newAction) { |
| 690 | message(LOG | CONSOLE, "Memory allocation failure\n"); |
| 691 | while (1) |
| 692 | sleep(1); |
| 693 | } |
| 694 | newAction->nextPtr = initActionList; |
| 695 | initActionList = newAction; |
| 696 | strncpy(newAction->process, process, 255); |
| 697 | newAction->action = action; |
| 698 | strncpy(newAction->console, cons, 255); |
| 699 | newAction->pid = 0; |
Erik Andersen | 3163821 | 2000-01-15 22:28:50 +0000 | [diff] [blame] | 700 | // message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n", |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 701 | // newAction->process, newAction->action, newAction->console); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 702 | } |
| 703 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 704 | static void delete_initAction(initAction * action) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 705 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 706 | initAction *a, *b = NULL; |
| 707 | |
| 708 | for (a = initActionList; a; b = a, a = a->nextPtr) { |
| 709 | if (a == action) { |
| 710 | if (b == NULL) { |
| 711 | initActionList = a->nextPtr; |
| 712 | } else { |
| 713 | b->nextPtr = a->nextPtr; |
| 714 | } |
| 715 | free(a); |
| 716 | break; |
| 717 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 718 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 719 | } |
| 720 | |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 721 | /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined, |
| 722 | * then parse_inittab() simply adds in some default |
| 723 | * actions(i.e runs INIT_SCRIPT and then starts a pair |
Erik Andersen | 812d466 | 2000-01-07 18:30:40 +0000 | [diff] [blame] | 724 | * of "askfirst" shells). If BB_FEATURE_USE_INITTAB |
| 725 | * _is_ defined, but /etc/inittab is missing, this |
| 726 | * results in the same set of default behaviors. |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 727 | * */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 728 | void parse_inittab(void) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 729 | { |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 730 | #ifdef BB_FEATURE_USE_INITTAB |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 731 | FILE *file; |
| 732 | char buf[256], lineAsRead[256], tmpConsole[256]; |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 733 | char *id, *runlev, *action, *process, *eol; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 734 | const struct initActionType *a = actions; |
| 735 | int foundIt; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 736 | |
| 737 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 738 | file = fopen(INITTAB, "r"); |
| 739 | if (file == NULL) { |
| 740 | /* No inittab file -- set up some default behavior */ |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 741 | #endif |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 742 | /* Swapoff on halt/reboot */ |
Pavel Roskin | 33bee33 | 2000-09-15 01:02:50 +0000 | [diff] [blame] | 743 | new_initAction(CTRLALTDEL, "/sbin/swapoff -a", console); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 744 | /* Umount all filesystems on halt/reboot */ |
Pavel Roskin | 33bee33 | 2000-09-15 01:02:50 +0000 | [diff] [blame] | 745 | new_initAction(CTRLALTDEL, "/bin/umount -a -r", console); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 746 | /* Askfirst shell on tty1 */ |
| 747 | new_initAction(ASKFIRST, SHELL, console); |
| 748 | /* Askfirst shell on tty2 */ |
| 749 | if (secondConsole != NULL) |
| 750 | new_initAction(ASKFIRST, SHELL, secondConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 751 | /* Askfirst shell on tty3 */ |
| 752 | if (thirdConsole != NULL) |
| 753 | new_initAction(ASKFIRST, SHELL, thirdConsole); |
| 754 | /* Askfirst shell on tty4 */ |
| 755 | if (fourthConsole != NULL) |
| 756 | new_initAction(ASKFIRST, SHELL, fourthConsole); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 757 | /* sysinit */ |
| 758 | new_initAction(SYSINIT, INIT_SCRIPT, console); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 759 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 760 | return; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 761 | #ifdef BB_FEATURE_USE_INITTAB |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 762 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 763 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 764 | while (fgets(buf, 255, file) != NULL) { |
| 765 | foundIt = FALSE; |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 766 | /* Skip leading spaces */ |
| 767 | for (id = buf; *id == ' ' || *id == '\t'; id++); |
| 768 | |
| 769 | /* Skip the line if it's a comment */ |
| 770 | if (*id == '#' || *id == '\n') |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 771 | continue; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 772 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 773 | /* Trim the trailing \n */ |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 774 | eol = strrchr(id, '\n'); |
| 775 | if (eol != NULL) |
| 776 | *eol = '\0'; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 777 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 778 | /* Keep a copy around for posterity's sake (and error msgs) */ |
| 779 | strcpy(lineAsRead, buf); |
| 780 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 781 | /* Separate the ID field from the runlevels */ |
| 782 | runlev = strchr(id, ':'); |
| 783 | if (runlev == NULL || *(runlev + 1) == '\0') { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 784 | message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead); |
| 785 | continue; |
| 786 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 787 | *runlev = '\0'; |
| 788 | ++runlev; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 789 | } |
| 790 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 791 | /* Separate the runlevels from the action */ |
| 792 | action = strchr(runlev, ':'); |
| 793 | if (action == NULL || *(action + 1) == '\0') { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 794 | message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead); |
| 795 | continue; |
| 796 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 797 | *action = '\0'; |
| 798 | ++action; |
| 799 | } |
| 800 | |
| 801 | /* Separate the action from the process */ |
| 802 | process = strchr(action, ':'); |
| 803 | if (process == NULL || *(process + 1) == '\0') { |
| 804 | message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead); |
| 805 | continue; |
| 806 | } else { |
| 807 | *process = '\0'; |
| 808 | ++process; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 809 | } |
| 810 | |
| 811 | /* Ok, now process it */ |
| 812 | a = actions; |
| 813 | while (a->name != 0) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 814 | if (strcmp(a->name, action) == 0) { |
| 815 | if (*id != '\0') { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 816 | struct stat statBuf; |
| 817 | |
| 818 | strcpy(tmpConsole, "/dev/"); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 819 | strncat(tmpConsole, id, 200); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 820 | if (stat(tmpConsole, &statBuf) != 0) { |
| 821 | message(LOG | CONSOLE, |
| 822 | "device '%s' does not exist. Did you read the directions?\n", |
| 823 | tmpConsole); |
| 824 | break; |
| 825 | } |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 826 | id = tmpConsole; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 827 | } |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 828 | new_initAction(a->action, process, id); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 829 | foundIt = TRUE; |
| 830 | } |
| 831 | a++; |
| 832 | } |
| 833 | if (foundIt == TRUE) |
| 834 | continue; |
| 835 | else { |
| 836 | /* Choke on an unknown action */ |
| 837 | message(LOG | CONSOLE, "Bad inittab entry: %s\n", lineAsRead); |
| 838 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 839 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 840 | return; |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 841 | #endif /* BB_FEATURE_USE_INITTAB */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 842 | } |
| 843 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 844 | |
| 845 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 846 | extern int init_main(int argc, char **argv) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 847 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 848 | initAction *a; |
| 849 | pid_t wpid; |
| 850 | int status; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 851 | |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 852 | #ifndef DEBUG_INIT |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 853 | /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */ |
| 854 | if (getpid() != 1 |
| 855 | #ifdef BB_FEATURE_LINUXRC |
Matt Kraai | e58771e | 2000-07-12 15:38:49 +0000 | [diff] [blame] | 856 | && strstr(applet_name, "linuxrc") == NULL |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 857 | #endif |
| 858 | ) |
| 859 | { |
Eric Andersen | 67991cf | 2001-02-14 21:23:06 +0000 | [diff] [blame] | 860 | show_usage(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 861 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 862 | /* Set up sig handlers -- be sure to |
| 863 | * clear all of these in run() */ |
| 864 | signal(SIGUSR1, halt_signal); |
Eric Andersen | 4c95a28 | 2000-07-07 19:30:28 +0000 | [diff] [blame] | 865 | signal(SIGUSR2, halt_signal); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 866 | signal(SIGINT, reboot_signal); |
| 867 | signal(SIGTERM, reboot_signal); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 868 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 869 | /* Turn off rebooting via CTL-ALT-DEL -- we get a |
| 870 | * SIGINT on CAD so we can shut things down gracefully... */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 871 | init_reboot(RB_DISABLE_CAD); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 872 | #endif |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 873 | |
Erik Andersen | 298854f | 2000-03-23 01:09:18 +0000 | [diff] [blame] | 874 | /* Figure out what kernel this is running */ |
| 875 | kernelVersion = get_kernel_revision(); |
| 876 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 877 | /* Figure out where the default console should be */ |
| 878 | console_init(); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 879 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 880 | /* Close whatever files are open, and reset the console. */ |
| 881 | close(0); |
| 882 | close(1); |
| 883 | close(2); |
| 884 | set_term(0); |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 885 | chdir("/"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 886 | setsid(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 887 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 888 | /* Make sure PATH is set to something sane */ |
Eric Andersen | 452fd33 | 2001-03-04 06:47:33 +0000 | [diff] [blame] | 889 | putenv("PATH="_PATH_STDPATH); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 890 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 891 | /* Hello world */ |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 892 | #ifndef DEBUG_INIT |
Erik Andersen | ea6b67d | 2000-03-07 07:47:10 +0000 | [diff] [blame] | 893 | message( |
| 894 | #if ! defined BB_FEATURE_EXTRA_QUIET |
| 895 | CONSOLE| |
| 896 | #endif |
| 897 | LOG, |
Pavel Roskin | 9c5fcc3 | 2000-07-17 23:45:12 +0000 | [diff] [blame] | 898 | "init started: %s\r\n", full_version); |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 899 | #else |
Erik Andersen | ea6b67d | 2000-03-07 07:47:10 +0000 | [diff] [blame] | 900 | message( |
| 901 | #if ! defined BB_FEATURE_EXTRA_QUIET |
| 902 | CONSOLE| |
| 903 | #endif |
| 904 | LOG, |
Pavel Roskin | 9c5fcc3 | 2000-07-17 23:45:12 +0000 | [diff] [blame] | 905 | "init(%d) started: %s\r\n", getpid(), full_version); |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 906 | #endif |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 907 | |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 908 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 909 | /* Make sure there is enough memory to do something useful. */ |
| 910 | check_memory(); |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 911 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 912 | /* Check if we are supposed to be in single user mode */ |
| 913 | if (argc > 1 && (!strcmp(argv[1], "single") || |
| 914 | !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) { |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 915 | /* Ask first then start a shell on tty2-4 */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 916 | if (secondConsole != NULL) |
| 917 | new_initAction(ASKFIRST, SHELL, secondConsole); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 918 | if (thirdConsole != NULL) |
| 919 | new_initAction(ASKFIRST, SHELL, thirdConsole); |
| 920 | if (fourthConsole != NULL) |
| 921 | new_initAction(ASKFIRST, SHELL, fourthConsole); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 922 | /* Start a shell on tty1 */ |
| 923 | new_initAction(RESPAWN, SHELL, console); |
| 924 | } else { |
| 925 | /* Not in single user mode -- see what inittab says */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 926 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 927 | /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined, |
| 928 | * then parse_inittab() simply adds in some default |
| 929 | * actions(i.e runs INIT_SCRIPT and then starts a pair |
| 930 | * of "askfirst" shells */ |
| 931 | parse_inittab(); |
Eric Andersen | d00c262 | 1999-12-07 08:37:31 +0000 | [diff] [blame] | 932 | } |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 933 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 934 | /* Fix up argv[0] to be certain we claim to be init */ |
Eric Andersen | f34aa4c | 2000-09-21 02:32:11 +0000 | [diff] [blame] | 935 | argv[0]="init"; |
| 936 | |
Erik Andersen | 07f5604 | 2000-02-09 06:05:01 +0000 | [diff] [blame] | 937 | if (argc > 1) |
Eric Andersen | 53cfb7e | 2001-01-31 17:29:47 +0000 | [diff] [blame] | 938 | argv[1][0]=0; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 939 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 940 | /* Now run everything that needs to be run */ |
| 941 | |
| 942 | /* First run the sysinit command */ |
| 943 | for (a = initActionList; a; a = a->nextPtr) { |
| 944 | if (a->action == SYSINIT) { |
| 945 | waitfor(a->process, a->console, FALSE); |
| 946 | /* Now remove the "sysinit" entry from the list */ |
| 947 | delete_initAction(a); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 948 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 949 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 950 | /* Next run anything that wants to block */ |
| 951 | for (a = initActionList; a; a = a->nextPtr) { |
| 952 | if (a->action == WAIT) { |
| 953 | waitfor(a->process, a->console, FALSE); |
| 954 | /* Now remove the "wait" entry from the list */ |
| 955 | delete_initAction(a); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 956 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 957 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 958 | /* Next run anything to be run only once */ |
| 959 | for (a = initActionList; a; a = a->nextPtr) { |
| 960 | if (a->action == ONCE) { |
| 961 | run(a->process, a->console, FALSE); |
| 962 | /* Now remove the "once" entry from the list */ |
| 963 | delete_initAction(a); |
| 964 | } |
| 965 | } |
| 966 | /* If there is nothing else to do, stop */ |
| 967 | if (initActionList == NULL) { |
| 968 | message(LOG | CONSOLE, |
| 969 | "No more tasks for init -- sleeping forever.\n"); |
| 970 | while (1) |
| 971 | sleep(1); |
| 972 | } |
| 973 | |
| 974 | /* Now run the looping stuff for the rest of forever */ |
| 975 | while (1) { |
| 976 | for (a = initActionList; a; a = a->nextPtr) { |
| 977 | /* Only run stuff with pid==0. If they have |
| 978 | * a pid, that means they are still running */ |
| 979 | if (a->pid == 0) { |
| 980 | switch (a->action) { |
| 981 | case RESPAWN: |
| 982 | /* run the respawn stuff */ |
| 983 | a->pid = run(a->process, a->console, FALSE); |
| 984 | break; |
| 985 | case ASKFIRST: |
| 986 | /* run the askfirst stuff */ |
| 987 | a->pid = run(a->process, a->console, TRUE); |
| 988 | break; |
| 989 | /* silence the compiler's incessant whining */ |
| 990 | default: |
| 991 | break; |
| 992 | } |
| 993 | } |
| 994 | } |
| 995 | /* Wait for a child process to exit */ |
| 996 | wpid = wait(&status); |
| 997 | if (wpid > 0) { |
| 998 | /* Find out who died and clean up their corpse */ |
| 999 | for (a = initActionList; a; a = a->nextPtr) { |
| 1000 | if (a->pid == wpid) { |
| 1001 | a->pid = 0; |
| 1002 | message(LOG, |
| 1003 | "Process '%s' (pid %d) exited. Scheduling it for restart.\n", |
| 1004 | a->process, wpid); |
| 1005 | } |
| 1006 | } |
| 1007 | } |
| 1008 | sleep(1); |
| 1009 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1010 | } |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 1011 | |
| 1012 | /* |
| 1013 | Local Variables: |
| 1014 | c-file-style: "linux" |
| 1015 | c-basic-offset: 4 |
| 1016 | tab-width: 4 |
| 1017 | End: |
| 1018 | */ |