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 | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 6 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.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 | * |
Rob Landley | 2edf526 | 2006-01-22 02:41:51 +0000 | [diff] [blame] | 9 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 10 | */ |
| 11 | |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 12 | #include "busybox.h" |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 13 | #include <errno.h> |
Eric Andersen | b186d98 | 1999-12-03 09:19:54 +0000 | [diff] [blame] | 14 | #include <paths.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 15 | #include <signal.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 16 | #include <sys/ioctl.h> |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 17 | #include <sys/wait.h> |
Eric Andersen | 85e5e72 | 2003-07-22 08:56:55 +0000 | [diff] [blame] | 18 | #include <sys/reboot.h> |
Eric Andersen | b01ed65 | 2003-06-27 17:08:15 +0000 | [diff] [blame] | 19 | |
| 20 | #include "init_shared.h" |
| 21 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 22 | #ifdef CONFIG_SYSLOGD |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 23 | # include <sys/syslog.h> |
| 24 | #endif |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 25 | |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 26 | #define INIT_BUFFS_SIZE 256 |
| 27 | |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 28 | /* From <linux/vt.h> */ |
| 29 | struct vt_stat { |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 30 | unsigned short v_active; /* active vt */ |
| 31 | unsigned short v_signal; /* signal to send */ |
| 32 | unsigned short v_state; /* vt bitmask */ |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 33 | }; |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 34 | enum { VT_GETSTATE = 0x5603 }; /* get global vt state info */ |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 35 | |
| 36 | /* From <linux/serial.h> */ |
| 37 | struct serial_struct { |
Eric Andersen | 81155f8 | 2003-09-11 08:52:22 +0000 | [diff] [blame] | 38 | int type; |
| 39 | int line; |
| 40 | unsigned int port; |
| 41 | int irq; |
| 42 | int flags; |
| 43 | int xmit_fifo_size; |
| 44 | int custom_divisor; |
| 45 | int baud_base; |
| 46 | unsigned short close_delay; |
| 47 | char io_type; |
| 48 | char reserved_char[1]; |
| 49 | int hub6; |
| 50 | unsigned short closing_wait; /* time to wait before closing */ |
| 51 | unsigned short closing_wait2; /* no longer used... */ |
| 52 | unsigned char *iomem_base; |
| 53 | unsigned short iomem_reg_shift; |
| 54 | unsigned int port_high; |
| 55 | unsigned long iomap_base; /* cookie passed into ioremap */ |
| 56 | int reserved[1]; |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame] | 57 | }; |
| 58 | |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 59 | #ifndef _PATH_STDPATH |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 60 | #define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin" |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 61 | #endif |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 62 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 63 | #if defined CONFIG_FEATURE_INIT_COREDUMPS |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 64 | /* |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 65 | * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 66 | * before processes are spawned to set core file size as unlimited. |
| 67 | * This is for debugging only. Don't use this is production, unless |
| 68 | * you want core dumps lying about.... |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 69 | */ |
| 70 | #define CORE_ENABLE_FLAG_FILE "/.init_enable_core" |
| 71 | #include <sys/resource.h> |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 72 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 73 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 74 | #define INITTAB "/etc/inittab" /* inittab file location */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 75 | #ifndef INIT_SCRIPT |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 76 | #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 77 | #endif |
Erik Andersen | 9c88cac | 1999-12-30 09:25:17 +0000 | [diff] [blame] | 78 | |
Eric Andersen | 41492d6 | 2001-02-23 00:05:56 +0000 | [diff] [blame] | 79 | #define MAXENV 16 /* Number of env. vars */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 80 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 81 | #define CONSOLE_BUFF_SIZE 32 |
| 82 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 83 | /* Allowed init action types */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 84 | #define SYSINIT 0x001 |
| 85 | #define RESPAWN 0x002 |
| 86 | #define ASKFIRST 0x004 |
| 87 | #define WAIT 0x008 |
| 88 | #define ONCE 0x010 |
| 89 | #define CTRLALTDEL 0x020 |
| 90 | #define SHUTDOWN 0x040 |
| 91 | #define RESTART 0x080 |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 92 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 93 | /* A mapping between "inittab" action name strings and action type codes. */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 94 | struct init_action_type { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 95 | const char *name; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 96 | int action; |
| 97 | }; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 98 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 99 | static const struct init_action_type actions[] = { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 100 | {"sysinit", SYSINIT}, |
| 101 | {"respawn", RESPAWN}, |
| 102 | {"askfirst", ASKFIRST}, |
| 103 | {"wait", WAIT}, |
| 104 | {"once", ONCE}, |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 105 | {"ctrlaltdel", CTRLALTDEL}, |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 106 | {"shutdown", SHUTDOWN}, |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 107 | {"restart", RESTART}, |
Pavel Roskin | 9027bcf | 2000-07-14 15:44:25 +0000 | [diff] [blame] | 108 | {0, 0} |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 109 | }; |
| 110 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 111 | /* Set up a linked list of init_actions, to be read from inittab */ |
| 112 | struct init_action { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 113 | pid_t pid; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 114 | char command[INIT_BUFFS_SIZE]; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 115 | char terminal[CONSOLE_BUFF_SIZE]; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 116 | struct init_action *next; |
| 117 | int action; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 118 | }; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 119 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 120 | /* Static variables */ |
| 121 | static struct init_action *init_action_list = NULL; |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 122 | static char console[CONSOLE_BUFF_SIZE] = CONSOLE_DEV; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 123 | |
Eric Andersen | e707806 | 2002-07-29 08:00:16 +0000 | [diff] [blame] | 124 | #ifndef CONFIG_SYSLOGD |
Mike Frysinger | 72a4c33 | 2005-07-05 02:19:20 +0000 | [diff] [blame] | 125 | static char *log_console = VC_5; |
Eric Andersen | e707806 | 2002-07-29 08:00:16 +0000 | [diff] [blame] | 126 | #endif |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 127 | #if !ENABLE_DEBUG_INIT |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 128 | static sig_atomic_t got_cont = 0; |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 129 | #endif |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 130 | |
| 131 | enum { |
| 132 | LOG = 0x1, |
| 133 | CONSOLE = 0x2, |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 134 | |
Eric Andersen | b0cc0a6 | 2002-03-20 14:57:50 +0000 | [diff] [blame] | 135 | #if defined CONFIG_FEATURE_EXTRA_QUIET |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 136 | MAYBE_CONSOLE = 0x0, |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 137 | #else |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 138 | MAYBE_CONSOLE = CONSOLE, |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 139 | #endif |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 140 | |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 141 | #ifndef RB_HALT_SYSTEM |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 142 | RB_HALT_SYSTEM = 0xcdef0123, /* FIXME: this overflows enum */ |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 143 | RB_ENABLE_CAD = 0x89abcdef, |
| 144 | RB_DISABLE_CAD = 0, |
| 145 | RB_POWER_OFF = 0x4321fedc, |
| 146 | RB_AUTOBOOT = 0x01234567, |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 147 | #endif |
Rob Landley | bc68cd1 | 2006-03-10 19:22:06 +0000 | [diff] [blame] | 148 | }; |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 149 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 150 | static const char * const environment[] = { |
| 151 | "HOME=/", |
| 152 | "PATH=" _PATH_STDPATH, |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 153 | "SHELL=/bin/sh", |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 154 | "USER=root", |
| 155 | NULL |
| 156 | }; |
| 157 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 158 | /* Function prototypes */ |
| 159 | static void delete_init_action(struct init_action *a); |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 160 | static int waitfor(const struct init_action *a, pid_t pid); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 161 | #if !ENABLE_DEBUG_INIT |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 162 | static void shutdown_signal(int sig); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 163 | #endif |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 164 | |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 165 | static void loop_forever(void) |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 166 | { |
| 167 | while (1) |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 168 | sleep(1); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 169 | } |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 170 | |
Erik Andersen | 42094cd | 2000-03-20 21:34:52 +0000 | [diff] [blame] | 171 | /* Print a message to the specified device. |
| 172 | * Device may be bitwise-or'd from LOG | CONSOLE */ |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 173 | #if ENABLE_DEBUG_INIT |
| 174 | #define messageD message |
| 175 | #else |
Rob Landley | 88621d7 | 2006-08-29 19:41:06 +0000 | [diff] [blame] | 176 | #define messageD(...) do {;} while(0); |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 177 | #endif |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 178 | static void message(int device, const char *fmt, ...) |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 179 | __attribute__ ((format(printf, 2, 3))); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 180 | static void message(int device, const char *fmt, ...) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 181 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 182 | va_list arguments; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 183 | int l; |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 184 | RESERVE_CONFIG_BUFFER(msg, 1024); |
Eric Andersen | 2223701 | 2003-01-23 07:08:26 +0000 | [diff] [blame] | 185 | #ifndef CONFIG_SYSLOGD |
| 186 | static int log_fd = -1; |
| 187 | #endif |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 188 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 189 | msg[0] = '\r'; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 190 | va_start(arguments, fmt); |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 191 | l = vsnprintf(msg + 1, 1024 - 2, fmt, arguments) + 1; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 192 | va_end(arguments); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 193 | |
| 194 | #ifdef CONFIG_SYSLOGD |
| 195 | /* Log the message to syslogd */ |
| 196 | if (device & LOG) { |
| 197 | /* don`t out "\r\n" */ |
Denis Vlasenko | 8f8f268 | 2006-10-03 21:00:43 +0000 | [diff] [blame] | 198 | openlog(applet_name, 0, LOG_DAEMON); |
"Vladimir N. Oleynik" | 8e1bd4a | 2005-09-29 12:55:21 +0000 | [diff] [blame] | 199 | syslog(LOG_INFO, "%s", msg + 1); |
Eric Andersen | 36adca8 | 2004-06-22 10:07:17 +0000 | [diff] [blame] | 200 | closelog(); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 201 | } |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 202 | |
| 203 | msg[l++] = '\n'; |
| 204 | msg[l] = 0; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 205 | #else |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 206 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 207 | msg[l++] = '\n'; |
| 208 | msg[l] = 0; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 209 | /* Take full control of the log tty, and never close it. |
| 210 | * It's mine, all mine! Muhahahaha! */ |
| 211 | if (log_fd < 0) { |
Mike Frysinger | e548bdf | 2005-07-06 04:46:14 +0000 | [diff] [blame] | 212 | if ((log_fd = device_open(log_console, O_RDWR | O_NONBLOCK | O_NOCTTY)) < 0) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 213 | log_fd = -2; |
Denis Vlasenko | e1a0d48 | 2006-10-20 13:28:22 +0000 | [diff] [blame] | 214 | bb_error_msg("bummer, can't write to log on %s!", log_console); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 215 | device = CONSOLE; |
Eric Andersen | 6a97990 | 2002-09-30 20:08:53 +0000 | [diff] [blame] | 216 | } else { |
| 217 | fcntl(log_fd, F_SETFD, FD_CLOEXEC); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 218 | } |
| 219 | } |
| 220 | if ((device & LOG) && (log_fd >= 0)) { |
Rob Landley | 5343747 | 2006-07-16 08:14:35 +0000 | [diff] [blame] | 221 | full_write(log_fd, msg, l); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 222 | } |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 223 | #endif |
| 224 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 225 | if (device & CONSOLE) { |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 226 | int fd = device_open(CONSOLE_DEV, |
Mike Frysinger | e548bdf | 2005-07-06 04:46:14 +0000 | [diff] [blame] | 227 | O_WRONLY | O_NOCTTY | O_NONBLOCK); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 228 | /* Always send console messages to /dev/console so people will see them. */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 229 | if (fd >= 0) { |
Rob Landley | 5343747 | 2006-07-16 08:14:35 +0000 | [diff] [blame] | 230 | full_write(fd, msg, l); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 231 | close(fd); |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 232 | #if ENABLE_DEBUG_INIT |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 233 | /* all descriptors may be closed */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 234 | } else { |
Denis Vlasenko | e1a0d48 | 2006-10-20 13:28:22 +0000 | [diff] [blame] | 235 | bb_error_msg("bummer, can't print: "); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 236 | va_start(arguments, fmt); |
| 237 | vfprintf(stderr, fmt, arguments); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 238 | va_end(arguments); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 239 | #endif |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 240 | } |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 241 | } |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 242 | RELEASE_CONFIG_BUFFER(msg); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 243 | } |
| 244 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 245 | /* Set terminal settings to reasonable defaults */ |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 246 | static void set_term(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 247 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 248 | struct termios tty; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 249 | |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 250 | tcgetattr(STDIN_FILENO, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 251 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 252 | /* set control chars */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 253 | tty.c_cc[VINTR] = 3; /* C-c */ |
| 254 | tty.c_cc[VQUIT] = 28; /* C-\ */ |
| 255 | tty.c_cc[VERASE] = 127; /* C-? */ |
| 256 | tty.c_cc[VKILL] = 21; /* C-u */ |
| 257 | tty.c_cc[VEOF] = 4; /* C-d */ |
Eric Andersen | 3849f9b | 2000-07-10 19:56:47 +0000 | [diff] [blame] | 258 | tty.c_cc[VSTART] = 17; /* C-q */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 259 | tty.c_cc[VSTOP] = 19; /* C-s */ |
| 260 | tty.c_cc[VSUSP] = 26; /* C-z */ |
Eric Andersen | 02bc25b | 2000-07-06 21:29:32 +0000 | [diff] [blame] | 261 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 262 | /* use line dicipline 0 */ |
| 263 | tty.c_line = 0; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 264 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 265 | /* Make it be sane */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 266 | tty.c_cflag &= CBAUD | CBAUDEX | CSIZE | CSTOPB | PARENB | PARODD; |
| 267 | tty.c_cflag |= CREAD | HUPCL | CLOCAL; |
Eric Andersen | d886292 | 2001-04-23 15:14:11 +0000 | [diff] [blame] | 268 | |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 269 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 270 | /* input modes */ |
| 271 | tty.c_iflag = ICRNL | IXON | IXOFF; |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 272 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 273 | /* output modes */ |
| 274 | tty.c_oflag = OPOST | ONLCR; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 275 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 276 | /* local modes */ |
| 277 | tty.c_lflag = |
| 278 | ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 279 | |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 280 | tcsetattr(STDIN_FILENO, TCSANOW, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 281 | } |
| 282 | |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 283 | static void console_init(void) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 284 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 285 | int fd; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 286 | int tried = 0; |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 287 | struct vt_stat vt; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 288 | struct serial_struct sr; |
| 289 | char *s; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 290 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 291 | if ((s = getenv("CONSOLE")) != NULL || (s = getenv("console")) != NULL) { |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 292 | safe_strncpy(console, s, sizeof(console)); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 293 | } else { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 294 | /* 2.2 kernels: identify the real console backend and try to use it */ |
| 295 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
| 296 | /* this is a serial console */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 297 | snprintf(console, sizeof(console) - 1, SC_FORMAT, sr.line); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 298 | } else if (ioctl(0, VT_GETSTATE, &vt) == 0) { |
| 299 | /* this is linux virtual tty */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 300 | snprintf(console, sizeof(console) - 1, VC_FORMAT, vt.v_active); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 301 | } else { |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 302 | safe_strncpy(console, CONSOLE_DEV, sizeof(console)); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 303 | tried++; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 304 | } |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 305 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 306 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 307 | while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0 && tried < 2) { |
| 308 | /* Can't open selected console -- try |
| 309 | logical system console and VT_MASTER */ |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 310 | safe_strncpy(console, (tried == 0 ? CONSOLE_DEV : CURRENT_VC), |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 311 | sizeof(console)); |
| 312 | tried++; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 313 | } |
| 314 | if (fd < 0) { |
| 315 | /* Perhaps we should panic here? */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 316 | #ifndef CONFIG_SYSLOGD |
Mike Frysinger | 72a4c33 | 2005-07-05 02:19:20 +0000 | [diff] [blame] | 317 | log_console = |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 318 | #endif |
"Vladimir N. Oleynik" | 6c35c7c | 2005-10-12 15:34:25 +0000 | [diff] [blame] | 319 | safe_strncpy(console, bb_dev_null, sizeof(console)); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 320 | } else { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 321 | s = getenv("TERM"); |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame] | 322 | /* check for serial console */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 323 | if (ioctl(fd, TIOCGSERIAL, &sr) == 0) { |
Erik Andersen | fa4718e | 2000-02-21 19:25:12 +0000 | [diff] [blame] | 324 | /* Force the TERM setting to vt102 for serial console -- |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame] | 325 | * if TERM is set to linux (the default) */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 326 | if (s == NULL || strcmp(s, "linux") == 0) |
| 327 | putenv("TERM=vt102"); |
| 328 | #ifndef CONFIG_SYSLOGD |
Mike Frysinger | 72a4c33 | 2005-07-05 02:19:20 +0000 | [diff] [blame] | 329 | log_console = console; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 330 | #endif |
| 331 | } else { |
| 332 | if (s == NULL) |
| 333 | putenv("TERM=linux"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 334 | } |
| 335 | close(fd); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 336 | } |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 337 | messageD(LOG, "console=%s", console); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 338 | } |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 339 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 340 | static void fixup_argv(int argc, char **argv, char *new_argv0) |
| 341 | { |
| 342 | int len; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 343 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 344 | /* Fix up argv[0] to be certain we claim to be init */ |
| 345 | len = strlen(argv[0]); |
| 346 | memset(argv[0], 0, len); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 347 | safe_strncpy(argv[0], new_argv0, len + 1); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 348 | |
| 349 | /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */ |
| 350 | len = 1; |
| 351 | while (argc > len) { |
| 352 | memset(argv[len], 0, strlen(argv[len])); |
| 353 | len++; |
| 354 | } |
| 355 | } |
| 356 | |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 357 | /* Open the new terminal device */ |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 358 | static void open_new_terminal(const char * const device, const int fail) { |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 359 | struct stat sb; |
| 360 | |
| 361 | if ((device_open(device, O_RDWR)) < 0) { |
| 362 | if (stat(device, &sb) != 0) { |
| 363 | message(LOG | CONSOLE, "device '%s' does not exist.", device); |
| 364 | } else { |
| 365 | message(LOG | CONSOLE, "Bummer, can't open %s", device); |
| 366 | } |
| 367 | if (fail) |
| 368 | _exit(1); |
| 369 | /* else */ |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 370 | #if !ENABLE_DEBUG_INIT |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 371 | shutdown_signal(SIGUSR1); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 372 | #else |
| 373 | _exit(2); |
| 374 | #endif |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 375 | } |
| 376 | } |
| 377 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 378 | static pid_t run(const struct init_action *a) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 379 | { |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 380 | int i; |
Mike Frysinger | 10427ab | 2005-07-06 05:00:48 +0000 | [diff] [blame] | 381 | pid_t pid; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 382 | char *s, *tmpCmd, *cmd[INIT_BUFFS_SIZE], *cmdpath; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 383 | char buf[INIT_BUFFS_SIZE + 6]; /* INIT_BUFFS_SIZE+strlen("exec ")+1 */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 384 | sigset_t nmask, omask; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 385 | static const char press_enter[] = |
| 386 | #ifdef CUSTOMIZED_BANNER |
| 387 | #include CUSTOMIZED_BANNER |
| 388 | #endif |
| 389 | "\nPlease press Enter to activate this console. "; |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 390 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 391 | /* Block sigchild while forking. */ |
| 392 | sigemptyset(&nmask); |
| 393 | sigaddset(&nmask, SIGCHLD); |
| 394 | sigprocmask(SIG_BLOCK, &nmask, &omask); |
| 395 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 396 | if ((pid = fork()) == 0) { |
Mike Frysinger | 10427ab | 2005-07-06 05:00:48 +0000 | [diff] [blame] | 397 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 398 | /* Clean up */ |
| 399 | close(0); |
| 400 | close(1); |
| 401 | close(2); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 402 | sigprocmask(SIG_SETMASK, &omask, NULL); |
| 403 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 404 | /* Reset signal handlers that were set by the parent process */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 405 | signal(SIGUSR1, SIG_DFL); |
| 406 | signal(SIGUSR2, SIG_DFL); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 407 | signal(SIGINT, SIG_DFL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 408 | signal(SIGTERM, SIG_DFL); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 409 | signal(SIGHUP, SIG_DFL); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 410 | signal(SIGQUIT, SIG_DFL); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 411 | signal(SIGCONT, SIG_DFL); |
| 412 | signal(SIGSTOP, SIG_DFL); |
| 413 | signal(SIGTSTP, SIG_DFL); |
Eric Andersen | 2f6c04f | 1999-11-01 23:59:44 +0000 | [diff] [blame] | 414 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 415 | /* Create a new session and make ourself the process |
Eric Andersen | e8a90fb | 2002-10-12 04:05:48 +0000 | [diff] [blame] | 416 | * group leader */ |
| 417 | setsid(); |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 418 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 419 | /* Open the new terminal device */ |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 420 | open_new_terminal(a->terminal, 1); |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 421 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 422 | /* Make sure the terminal will act fairly normal for us */ |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 423 | set_term(); |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 424 | /* Setup stdout, stderr for the new process so |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 425 | * they point to the supplied terminal */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 426 | dup(0); |
| 427 | dup(0); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 428 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 429 | /* If the init Action requires us to wait, then force the |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 430 | * supplied terminal to be the controlling tty. */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 431 | if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 432 | |
| 433 | /* Now fork off another process to just hang around */ |
| 434 | if ((pid = fork()) < 0) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 435 | message(LOG | CONSOLE, "Can't fork!"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 436 | _exit(1); |
| 437 | } |
| 438 | |
| 439 | if (pid > 0) { |
| 440 | |
| 441 | /* We are the parent -- wait till the child is done */ |
| 442 | signal(SIGINT, SIG_IGN); |
| 443 | signal(SIGTSTP, SIG_IGN); |
| 444 | signal(SIGQUIT, SIG_IGN); |
| 445 | signal(SIGCHLD, SIG_DFL); |
| 446 | |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 447 | waitfor(NULL, pid); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 448 | /* See if stealing the controlling tty back is necessary */ |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 449 | if (tcgetpgrp(0) != getpid()) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 450 | _exit(0); |
| 451 | |
| 452 | /* Use a temporary process to steal the controlling tty. */ |
| 453 | if ((pid = fork()) < 0) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 454 | message(LOG | CONSOLE, "Can't fork!"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 455 | _exit(1); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 456 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 457 | if (pid == 0) { |
| 458 | setsid(); |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 459 | ioctl(0, TIOCSCTTY, 1); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 460 | _exit(0); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 461 | } |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 462 | waitfor(NULL, pid); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 463 | _exit(0); |
| 464 | } |
| 465 | |
| 466 | /* Now fall though to actually execute things */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 467 | } |
| 468 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 469 | /* See if any special /bin/sh requiring characters are present */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 470 | if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 471 | cmd[0] = (char *)DEFAULT_SHELL; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 472 | cmd[1] = "-c"; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 473 | cmd[2] = strcat(strcpy(buf, "exec "), a->command); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 474 | cmd[3] = NULL; |
| 475 | } else { |
| 476 | /* Convert command (char*) into cmd (char**, one word per string) */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 477 | strcpy(buf, a->command); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 478 | s = buf; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 479 | for (tmpCmd = buf, i = 0; (tmpCmd = strsep(&s, " \t")) != NULL;) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 480 | if (*tmpCmd != '\0') { |
| 481 | cmd[i] = tmpCmd; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 482 | i++; |
| 483 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 484 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 485 | cmd[i] = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 486 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 487 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 488 | cmdpath = cmd[0]; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 489 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 490 | /* |
| 491 | Interactive shells want to see a dash in argv[0]. This |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 492 | typically is handled by login, argv will be setup this |
| 493 | way if a dash appears at the front of the command path |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 494 | (like "-/bin/sh"). |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 495 | */ |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 496 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 497 | if (*cmdpath == '-') { |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 498 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 499 | /* skip over the dash */ |
| 500 | ++cmdpath; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 501 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 502 | /* find the last component in the command pathname */ |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 503 | s = bb_get_last_path_component(cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 504 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 505 | /* make a new argv[0] */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 506 | if ((cmd[0] = malloc(strlen(s) + 2)) == NULL) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 507 | message(LOG | CONSOLE, bb_msg_memory_exhausted); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 508 | cmd[0] = cmdpath; |
| 509 | } else { |
| 510 | cmd[0][0] = '-'; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 511 | strcpy(cmd[0] + 1, s); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 512 | } |
Paul Fox | 41a72ec | 2005-08-01 16:43:13 +0000 | [diff] [blame] | 513 | #ifdef CONFIG_FEATURE_INIT_SCTTY |
| 514 | /* Establish this process as session leader and |
| 515 | * (attempt) to make the tty (if any) a controlling tty. |
| 516 | */ |
| 517 | (void) setsid(); |
| 518 | (void) ioctl(0, TIOCSCTTY, 0/*don't steal it*/); |
| 519 | #endif |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 520 | } |
| 521 | |
Eric Andersen | 1f50e84 | 2004-08-16 09:29:42 +0000 | [diff] [blame] | 522 | #if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 523 | if (a->action & ASKFIRST) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 524 | char c; |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 525 | /* |
| 526 | * Save memory by not exec-ing anything large (like a shell) |
| 527 | * before the user wants it. This is critical if swap is not |
| 528 | * enabled and the system has low memory. Generally this will |
| 529 | * be run on the second virtual console, and the first will |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 530 | * be allowed to start a shell or whatever an init script |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 531 | * specifies. |
| 532 | */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 533 | messageD(LOG, "Waiting for enter to start '%s'" |
| 534 | "(pid %d, terminal %s)\n", |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 535 | cmdpath, getpid(), a->terminal); |
Rob Landley | 5343747 | 2006-07-16 08:14:35 +0000 | [diff] [blame] | 536 | full_write(1, press_enter, sizeof(press_enter) - 1); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 537 | while(read(0, &c, 1) == 1 && c != '\n') |
| 538 | ; |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 539 | } |
Eric Andersen | 1f50e84 | 2004-08-16 09:29:42 +0000 | [diff] [blame] | 540 | #endif |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 541 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 542 | /* Log the process name and args */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 543 | message(LOG, "Starting pid %d, console %s: '%s'", |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 544 | getpid(), a->terminal, cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 545 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 546 | #if defined CONFIG_FEATURE_INIT_COREDUMPS |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 547 | { |
| 548 | struct stat sb; |
| 549 | if (stat(CORE_ENABLE_FLAG_FILE, &sb) == 0) { |
| 550 | struct rlimit limit; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 551 | |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 552 | limit.rlim_cur = RLIM_INFINITY; |
| 553 | limit.rlim_max = RLIM_INFINITY; |
| 554 | setrlimit(RLIMIT_CORE, &limit); |
| 555 | } |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 556 | } |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 557 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 558 | |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 559 | /* Now run it. The new program will take over this PID, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 560 | * so nothing further in init.c should be run. */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 561 | execv(cmdpath, cmd); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 562 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 563 | /* We're still here? Some error happened. */ |
Denis Vlasenko | ea62077 | 2006-10-14 02:23:43 +0000 | [diff] [blame] | 564 | message(LOG | CONSOLE, "Bummer, cannot run '%s': %m", cmdpath); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 565 | _exit(-1); |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 566 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 567 | sigprocmask(SIG_SETMASK, &omask, NULL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 568 | return pid; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 569 | } |
| 570 | |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 571 | static int waitfor(const struct init_action *a, pid_t pid) |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 572 | { |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 573 | int runpid; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 574 | int status, wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 575 | |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 576 | runpid = (NULL == a)? pid : run(a); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 577 | while (1) { |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 578 | wpid = waitpid(runpid,&status,0); |
| 579 | if (wpid == runpid) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 580 | break; |
Glenn L McGrath | e6ba16f | 2003-09-26 10:45:55 +0000 | [diff] [blame] | 581 | if (wpid == -1 && errno == ECHILD) { |
| 582 | /* we missed its termination */ |
| 583 | break; |
| 584 | } |
| 585 | /* FIXME other errors should maybe trigger an error, but allow |
| 586 | * the program to continue */ |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 587 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 588 | return wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 589 | } |
| 590 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 591 | /* Run all commands of a particular type */ |
| 592 | static void run_actions(int action) |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 593 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 594 | struct init_action *a, *tmp; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 595 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 596 | for (a = init_action_list; a; a = tmp) { |
| 597 | tmp = a->next; |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 598 | if (a->action == action) { |
Rob Landley | 2dd4279 | 2006-03-22 17:39:13 +0000 | [diff] [blame] | 599 | if (access(a->terminal, R_OK | W_OK)) { |
| 600 | delete_init_action(a); |
| 601 | } else if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) { |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 602 | waitfor(a, 0); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 603 | delete_init_action(a); |
| 604 | } else if (a->action & ONCE) { |
| 605 | run(a); |
| 606 | delete_init_action(a); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 607 | } else if (a->action & (RESPAWN | ASKFIRST)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 608 | /* Only run stuff with pid==0. If they have |
| 609 | * a pid, that means it is still running */ |
| 610 | if (a->pid == 0) { |
| 611 | a->pid = run(a); |
| 612 | } |
| 613 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 614 | } |
| 615 | } |
| 616 | } |
| 617 | |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 618 | #if !ENABLE_DEBUG_INIT |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 619 | static void init_reboot(unsigned long magic) |
| 620 | { |
| 621 | pid_t pid; |
| 622 | /* We have to fork here, since the kernel calls do_exit(0) in |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 623 | * linux/kernel/sys.c, which can cause the machine to panic when |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 624 | * the init process is killed.... */ |
| 625 | if ((pid = fork()) == 0) { |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 626 | reboot(magic); |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 627 | _exit(0); |
| 628 | } |
| 629 | waitpid (pid, NULL, 0); |
| 630 | } |
| 631 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 632 | static void shutdown_system(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 633 | { |
Eric Andersen | 813d88c | 2001-10-28 22:49:48 +0000 | [diff] [blame] | 634 | sigset_t block_signals; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 635 | |
Eric Andersen | a9cc896 | 2002-09-16 06:49:06 +0000 | [diff] [blame] | 636 | /* run everything to be run at "shutdown". This is done _prior_ |
| 637 | * to killing everything, in case people wish to use scripts to |
| 638 | * shut things down gracefully... */ |
| 639 | run_actions(SHUTDOWN); |
| 640 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 641 | /* first disable all our signals */ |
| 642 | sigemptyset(&block_signals); |
| 643 | sigaddset(&block_signals, SIGHUP); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 644 | sigaddset(&block_signals, SIGQUIT); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 645 | sigaddset(&block_signals, SIGCHLD); |
| 646 | sigaddset(&block_signals, SIGUSR1); |
| 647 | sigaddset(&block_signals, SIGUSR2); |
| 648 | sigaddset(&block_signals, SIGINT); |
| 649 | sigaddset(&block_signals, SIGTERM); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 650 | sigaddset(&block_signals, SIGCONT); |
| 651 | sigaddset(&block_signals, SIGSTOP); |
| 652 | sigaddset(&block_signals, SIGTSTP); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 653 | sigprocmask(SIG_BLOCK, &block_signals, NULL); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 654 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 655 | /* Allow Ctrl-Alt-Del to reboot system. */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 656 | init_reboot(RB_ENABLE_CAD); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 657 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 658 | message(CONSOLE | LOG, "The system is going down NOW !!"); |
Eric Andersen | cf8c9cf | 1999-11-05 00:31:46 +0000 | [diff] [blame] | 659 | sync(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 660 | |
| 661 | /* Send signals to every process _except_ pid 1 */ |
Bernhard Reutner-Fischer | 7ae1553 | 2006-05-30 18:17:21 +0000 | [diff] [blame] | 662 | message(CONSOLE | LOG, init_sending_format, "TERM"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 663 | kill(-1, SIGTERM); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 664 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 665 | sync(); |
| 666 | |
Bernhard Reutner-Fischer | 7ae1553 | 2006-05-30 18:17:21 +0000 | [diff] [blame] | 667 | message(CONSOLE | LOG, init_sending_format, "KILL"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 668 | kill(-1, SIGKILL); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 669 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 670 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 671 | sync(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 672 | } |
| 673 | |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 674 | static void exec_signal(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 675 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 676 | struct init_action *a, *tmp; |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 677 | sigset_t unblock_signals; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +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; |
| 681 | if (a->action & RESTART) { |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 682 | shutdown_system(); |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 683 | |
| 684 | /* unblock all signals, blocked in shutdown_system() */ |
| 685 | sigemptyset(&unblock_signals); |
| 686 | sigaddset(&unblock_signals, SIGHUP); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 687 | sigaddset(&unblock_signals, SIGQUIT); |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 688 | sigaddset(&unblock_signals, SIGCHLD); |
| 689 | sigaddset(&unblock_signals, SIGUSR1); |
| 690 | sigaddset(&unblock_signals, SIGUSR2); |
| 691 | sigaddset(&unblock_signals, SIGINT); |
| 692 | sigaddset(&unblock_signals, SIGTERM); |
| 693 | sigaddset(&unblock_signals, SIGCONT); |
| 694 | sigaddset(&unblock_signals, SIGSTOP); |
| 695 | sigaddset(&unblock_signals, SIGTSTP); |
| 696 | sigprocmask(SIG_UNBLOCK, &unblock_signals, NULL); |
| 697 | |
Eric Andersen | 9cdef5d | 2003-07-29 06:33:12 +0000 | [diff] [blame] | 698 | /* Close whatever files are open. */ |
| 699 | close(0); |
| 700 | close(1); |
| 701 | close(2); |
| 702 | |
Eric Andersen | 3c8064f | 2003-07-05 08:29:01 +0000 | [diff] [blame] | 703 | /* Open the new terminal device */ |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 704 | open_new_terminal(a->terminal, 0); |
Eric Andersen | 3c8064f | 2003-07-05 08:29:01 +0000 | [diff] [blame] | 705 | |
| 706 | /* Make sure the terminal will act fairly normal for us */ |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 707 | set_term(); |
Eric Andersen | 3c8064f | 2003-07-05 08:29:01 +0000 | [diff] [blame] | 708 | /* Setup stdout, stderr on the supplied terminal */ |
| 709 | dup(0); |
| 710 | dup(0); |
| 711 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 712 | messageD(CONSOLE | LOG, "Trying to re-exec %s", a->command); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 713 | execl(a->command, a->command, NULL); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 714 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 715 | message(CONSOLE | LOG, "exec of '%s' failed: %m", |
Eric Andersen | 71ae64b | 2002-10-10 04:20:21 +0000 | [diff] [blame] | 716 | a->command); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 717 | sync(); |
| 718 | sleep(2); |
| 719 | init_reboot(RB_HALT_SYSTEM); |
| 720 | loop_forever(); |
| 721 | } |
| 722 | } |
| 723 | } |
| 724 | |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 725 | static void shutdown_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 726 | { |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 727 | char *m; |
| 728 | int rb; |
| 729 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 730 | shutdown_system(); |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 731 | |
| 732 | if (sig == SIGTERM) { |
| 733 | m = "reboot"; |
| 734 | rb = RB_AUTOBOOT; |
| 735 | } else if (sig == SIGUSR2) { |
| 736 | m = "poweroff"; |
| 737 | rb = RB_POWER_OFF; |
| 738 | } else { |
| 739 | m = "halt"; |
| 740 | rb = RB_HALT_SYSTEM; |
| 741 | } |
| 742 | message(CONSOLE | LOG, "Requesting system %s.", m); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 743 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 744 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 745 | /* allow time for last message to reach serial console */ |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 746 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 747 | |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 748 | init_reboot(rb); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 749 | |
| 750 | loop_forever(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 751 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 752 | |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 753 | static void ctrlaltdel_signal(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 754 | { |
| 755 | run_actions(CTRLALTDEL); |
| 756 | } |
| 757 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 758 | /* The SIGSTOP & SIGTSTP handler */ |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 759 | static void stop_handler(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 760 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 761 | int saved_errno = errno; |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 762 | |
| 763 | got_cont = 0; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 764 | while (!got_cont) |
| 765 | pause(); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 766 | got_cont = 0; |
| 767 | errno = saved_errno; |
| 768 | } |
| 769 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 770 | /* The SIGCONT handler */ |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 771 | static void cont_handler(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 772 | { |
| 773 | got_cont = 1; |
| 774 | } |
| 775 | |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 776 | #endif /* ! ENABLE_DEBUG_INIT */ |
Erik Andersen | de55287 | 2000-01-23 01:34:05 +0000 | [diff] [blame] | 777 | |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 778 | static void new_init_action(int action, const char *command, const char *cons) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 779 | { |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 780 | struct init_action *new_action, *a, *last; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 781 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 782 | if (*cons == '\0') |
| 783 | cons = console; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 784 | |
"Vladimir N. Oleynik" | 6c35c7c | 2005-10-12 15:34:25 +0000 | [diff] [blame] | 785 | if (strcmp(cons, bb_dev_null) == 0 && (action & ASKFIRST)) |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 786 | return; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 787 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 788 | new_action = calloc((size_t) (1), sizeof(struct init_action)); |
| 789 | if (!new_action) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 790 | message(LOG | CONSOLE, "Memory allocation failure"); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 791 | loop_forever(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 792 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 793 | |
| 794 | /* Append to the end of the list */ |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 795 | for (a = last = init_action_list; a; a = a->next) { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 796 | /* don't enter action if it's already in the list, |
| 797 | * but do overwrite existing actions */ |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 798 | if ((strcmp(a->command, command) == 0) && |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 799 | (strcmp(a->terminal, cons) ==0)) { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 800 | a->action = action; |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 801 | free(new_action); |
| 802 | return; |
| 803 | } |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 804 | last = a; |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 805 | } |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 806 | if (last) { |
| 807 | last->next = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 808 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 809 | init_action_list = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 810 | } |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 811 | strcpy(new_action->command, command); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 812 | new_action->action = action; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 813 | strcpy(new_action->terminal, cons); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 814 | messageD(LOG|CONSOLE, "command='%s' action='%d' terminal='%s'\n", |
| 815 | new_action->command, new_action->action, new_action->terminal); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 816 | } |
| 817 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 818 | static void delete_init_action(struct init_action *action) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 819 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 820 | struct init_action *a, *b = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 821 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 822 | for (a = init_action_list; a; b = a, a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 823 | if (a == action) { |
| 824 | if (b == NULL) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 825 | init_action_list = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 826 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 827 | b->next = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 828 | } |
| 829 | free(a); |
| 830 | break; |
| 831 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 832 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 833 | } |
| 834 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 835 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 836 | * then parse_inittab() simply adds in some default |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 837 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
| 838 | * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB |
| 839 | * _is_ defined, but /etc/inittab is missing, this |
Erik Andersen | 812d466 | 2000-01-07 18:30:40 +0000 | [diff] [blame] | 840 | * results in the same set of default behaviors. |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 841 | */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 842 | static void parse_inittab(void) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 843 | { |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 844 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 845 | FILE *file; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 846 | char buf[INIT_BUFFS_SIZE], lineAsRead[INIT_BUFFS_SIZE]; |
| 847 | char tmpConsole[CONSOLE_BUFF_SIZE]; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 848 | char *id, *runlev, *action, *command, *eol; |
| 849 | const struct init_action_type *a = actions; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 850 | |
| 851 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 852 | file = fopen(INITTAB, "r"); |
| 853 | if (file == NULL) { |
| 854 | /* No inittab file -- set up some default behavior */ |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 855 | #endif |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 856 | /* Reboot on Ctrl-Alt-Del */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 857 | new_init_action(CTRLALTDEL, "/sbin/reboot", ""); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 858 | /* Umount all filesystems on halt/reboot */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 859 | new_init_action(SHUTDOWN, "/bin/umount -a -r", ""); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 860 | /* Swapoff on halt/reboot */ |
Rob Landley | 7a8f679 | 2005-08-30 18:17:05 +0000 | [diff] [blame] | 861 | if(ENABLE_SWAPONOFF) new_init_action(SHUTDOWN, "/sbin/swapoff -a", ""); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 862 | /* Prepare to restart init when a HUP is received */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 863 | new_init_action(RESTART, "/sbin/init", ""); |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame] | 864 | /* Askfirst shell on tty1-4 */ |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 865 | new_init_action(ASKFIRST, bb_default_login_shell, ""); |
| 866 | new_init_action(ASKFIRST, bb_default_login_shell, VC_2); |
| 867 | new_init_action(ASKFIRST, bb_default_login_shell, VC_3); |
| 868 | new_init_action(ASKFIRST, bb_default_login_shell, VC_4); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 869 | /* sysinit */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 870 | new_init_action(SYSINIT, INIT_SCRIPT, ""); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 871 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 872 | return; |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 873 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 874 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 875 | |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 876 | while (fgets(buf, INIT_BUFFS_SIZE, file) != NULL) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 877 | /* Skip leading spaces */ |
| 878 | for (id = buf; *id == ' ' || *id == '\t'; id++); |
| 879 | |
| 880 | /* Skip the line if it's a comment */ |
| 881 | if (*id == '#' || *id == '\n') |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 882 | continue; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 883 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 884 | /* Trim the trailing \n */ |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 885 | eol = strrchr(id, '\n'); |
| 886 | if (eol != NULL) |
| 887 | *eol = '\0'; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 888 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 889 | /* Keep a copy around for posterity's sake (and error msgs) */ |
| 890 | strcpy(lineAsRead, buf); |
| 891 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 892 | /* Separate the ID field from the runlevels */ |
| 893 | runlev = strchr(id, ':'); |
| 894 | if (runlev == NULL || *(runlev + 1) == '\0') { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 895 | message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 896 | continue; |
| 897 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 898 | *runlev = '\0'; |
| 899 | ++runlev; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 900 | } |
| 901 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 902 | /* Separate the runlevels from the action */ |
| 903 | action = strchr(runlev, ':'); |
| 904 | if (action == NULL || *(action + 1) == '\0') { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 905 | message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 906 | continue; |
| 907 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 908 | *action = '\0'; |
| 909 | ++action; |
| 910 | } |
| 911 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 912 | /* Separate the action from the command */ |
| 913 | command = strchr(action, ':'); |
| 914 | if (command == NULL || *(command + 1) == '\0') { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 915 | message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 916 | continue; |
| 917 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 918 | *command = '\0'; |
| 919 | ++command; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 920 | } |
| 921 | |
| 922 | /* Ok, now process it */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 923 | for (a = actions; a->name != 0; a++) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 924 | if (strcmp(a->name, action) == 0) { |
| 925 | if (*id != '\0') { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 926 | if(strncmp(id, "/dev/", 5) == 0) |
| 927 | id += 5; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 928 | strcpy(tmpConsole, "/dev/"); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 929 | safe_strncpy(tmpConsole + 5, id, |
| 930 | CONSOLE_BUFF_SIZE - 5); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 931 | id = tmpConsole; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 932 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 933 | new_init_action(a->action, command, id); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 934 | break; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 935 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 936 | } |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 937 | if (a->name == 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 938 | /* Choke on an unknown action */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 939 | message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 940 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 941 | } |
Eric Andersen | d8636ca | 2002-05-15 22:19:09 +0000 | [diff] [blame] | 942 | fclose(file); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 943 | return; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 944 | #endif /* CONFIG_FEATURE_USE_INITTAB */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 945 | } |
| 946 | |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 947 | #ifdef CONFIG_FEATURE_USE_INITTAB |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 948 | static void reload_signal(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 949 | { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 950 | struct init_action *a, *tmp; |
| 951 | |
| 952 | message(LOG, "Reloading /etc/inittab"); |
| 953 | |
| 954 | /* disable old entrys */ |
| 955 | for (a = init_action_list; a; a = a->next ) { |
| 956 | a->action = ONCE; |
| 957 | } |
| 958 | |
| 959 | parse_inittab(); |
| 960 | |
| 961 | /* remove unused entrys */ |
| 962 | for (a = init_action_list; a; a = tmp) { |
| 963 | tmp = a->next; |
| 964 | if (a->action & (ONCE | SYSINIT | WAIT ) && |
| 965 | a->pid == 0 ) { |
| 966 | delete_init_action(a); |
| 967 | } |
| 968 | } |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 969 | run_actions(RESPAWN); |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 970 | return; |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 971 | } |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 972 | #endif /* CONFIG_FEATURE_USE_INITTAB */ |
| 973 | |
Rob Landley | dfba741 | 2006-03-06 20:47:33 +0000 | [diff] [blame] | 974 | int init_main(int argc, char **argv) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 975 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 976 | struct init_action *a; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 977 | pid_t wpid; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 978 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 979 | if (argc > 1 && !strcmp(argv[1], "-q")) { |
Rob Landley | 2edf526 | 2006-01-22 02:41:51 +0000 | [diff] [blame] | 980 | return kill(1,SIGHUP); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 981 | } |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 982 | #if !ENABLE_DEBUG_INIT |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 983 | /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */ |
Rob Landley | 6461291 | 2006-01-30 08:31:37 +0000 | [diff] [blame] | 984 | if (getpid() != 1 && |
Denis Vlasenko | 8f8f268 | 2006-10-03 21:00:43 +0000 | [diff] [blame] | 985 | (!ENABLE_FEATURE_INITRD || !strstr(applet_name, "linuxrc"))) |
Rob Landley | 6461291 | 2006-01-30 08:31:37 +0000 | [diff] [blame] | 986 | { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 987 | bb_show_usage(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 988 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 989 | /* Set up sig handlers -- be sure to |
| 990 | * clear all of these in run() */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 991 | signal(SIGHUP, exec_signal); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 992 | signal(SIGQUIT, exec_signal); |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 993 | signal(SIGUSR1, shutdown_signal); |
| 994 | signal(SIGUSR2, shutdown_signal); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 995 | signal(SIGINT, ctrlaltdel_signal); |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 996 | signal(SIGTERM, shutdown_signal); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 997 | signal(SIGCONT, cont_handler); |
| 998 | signal(SIGSTOP, stop_handler); |
| 999 | signal(SIGTSTP, stop_handler); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1000 | |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 1001 | /* Turn off rebooting via CTL-ALT-DEL -- we get a |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1002 | * SIGINT on CAD so we can shut things down gracefully... */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 1003 | init_reboot(RB_DISABLE_CAD); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1004 | #endif |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 1005 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 1006 | /* Figure out where the default console should be */ |
| 1007 | console_init(); |
| 1008 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1009 | /* Close whatever files are open, and reset the console. */ |
| 1010 | close(0); |
| 1011 | close(1); |
| 1012 | close(2); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 1013 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 1014 | if (device_open(console, O_RDWR | O_NOCTTY) == 0) { |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 1015 | set_term(); |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 1016 | close(0); |
| 1017 | } |
| 1018 | |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1019 | chdir("/"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1020 | setsid(); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1021 | { |
| 1022 | const char * const *e; |
| 1023 | /* Make sure environs is set to something sane */ |
| 1024 | for(e = environment; *e; e++) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1025 | putenv((char *) *e); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1026 | } |
Rob Landley | cba1b96 | 2006-07-09 17:28:17 +0000 | [diff] [blame] | 1027 | |
| 1028 | if (argc > 1) setenv("RUNLEVEL", argv[1], 1); |
| 1029 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1030 | /* Hello world */ |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1031 | message(MAYBE_CONSOLE | LOG, "init started: %s", bb_msg_full_version); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1032 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1033 | /* Make sure there is enough memory to do something useful. */ |
Rob Landley | c3386a4 | 2005-08-30 18:50:37 +0000 | [diff] [blame] | 1034 | if (ENABLE_SWAPONOFF) { |
| 1035 | struct sysinfo info; |
| 1036 | |
| 1037 | if (!sysinfo(&info) && |
Denis Vlasenko | dca0b70 | 2006-10-27 09:05:02 +0000 | [diff] [blame^] | 1038 | (info.mem_unit ? : 1) * (long long)info.totalram < 1024*1024) |
Rob Landley | c3386a4 | 2005-08-30 18:50:37 +0000 | [diff] [blame] | 1039 | { |
| 1040 | message(CONSOLE,"Low memory: forcing swapon."); |
| 1041 | /* swapon -a requires /proc typically */ |
| 1042 | new_init_action(SYSINIT, "/bin/mount -t proc proc /proc", ""); |
| 1043 | /* Try to turn on swap */ |
| 1044 | new_init_action(SYSINIT, "/sbin/swapon -a", ""); |
| 1045 | run_actions(SYSINIT); /* wait and removing */ |
| 1046 | } |
| 1047 | } |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 1048 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1049 | /* Check if we are supposed to be in single user mode */ |
| 1050 | if (argc > 1 && (!strcmp(argv[1], "single") || |
| 1051 | !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1052 | /* Start a shell on console */ |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 1053 | new_init_action(RESPAWN, bb_default_login_shell, ""); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1054 | } else { |
| 1055 | /* Not in single user mode -- see what inittab says */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 1056 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1057 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1058 | * then parse_inittab() simply adds in some default |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 1059 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1060 | * of "askfirst" shells */ |
| 1061 | parse_inittab(); |
Eric Andersen | d00c262 | 1999-12-07 08:37:31 +0000 | [diff] [blame] | 1062 | } |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1063 | |
Rob Landley | b3ede5a | 2006-03-27 23:09:12 +0000 | [diff] [blame] | 1064 | #ifdef CONFIG_SELINUX |
| 1065 | if (getenv("SELINUX_INIT") == NULL) { |
| 1066 | int enforce = 0; |
| 1067 | |
| 1068 | putenv("SELINUX_INIT=YES"); |
| 1069 | if (selinux_init_load_policy(&enforce) == 0) { |
| 1070 | execv(argv[0], argv); |
| 1071 | } else if (enforce > 0) { |
| 1072 | /* SELinux in enforcing mode but load_policy failed */ |
| 1073 | /* At this point, we probably can't open /dev/console, so log() won't work */ |
| 1074 | message(CONSOLE,"Unable to load SELinux Policy. Machine is in enforcing mode. Halting now."); |
| 1075 | exit(1); |
| 1076 | } |
| 1077 | } |
| 1078 | #endif /* CONFIG_SELINUX */ |
| 1079 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 1080 | /* Make the command line just say "init" -- thats all, nothing else */ |
| 1081 | fixup_argv(argc, argv, "init"); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 1082 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1083 | /* Now run everything that needs to be run */ |
| 1084 | |
| 1085 | /* First run the sysinit command */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1086 | run_actions(SYSINIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1087 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1088 | /* Next run anything that wants to block */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1089 | run_actions(WAIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1090 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1091 | /* Next run anything to be run only once */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1092 | run_actions(ONCE); |
| 1093 | |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 1094 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 1095 | /* Redefine SIGHUP to reread /etc/inittab */ |
| 1096 | signal(SIGHUP, reload_signal); |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 1097 | #else |
| 1098 | signal(SIGHUP, SIG_IGN); |
| 1099 | #endif /* CONFIG_FEATURE_USE_INITTAB */ |
| 1100 | |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 1101 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1102 | /* Now run the looping stuff for the rest of forever */ |
| 1103 | while (1) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1104 | /* run the respawn stuff */ |
| 1105 | run_actions(RESPAWN); |
| 1106 | |
| 1107 | /* run the askfirst stuff */ |
| 1108 | run_actions(ASKFIRST); |
| 1109 | |
| 1110 | /* Don't consume all CPU time -- sleep a bit */ |
| 1111 | sleep(1); |
| 1112 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1113 | /* Wait for a child process to exit */ |
Bernhard Reutner-Fischer | c58dbf2 | 2006-05-30 12:16:54 +0000 | [diff] [blame] | 1114 | wpid = wait(NULL); |
Eric Andersen | 87812dc | 2004-04-12 19:21:54 +0000 | [diff] [blame] | 1115 | while (wpid > 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1116 | /* Find out who died and clean up their corpse */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1117 | for (a = init_action_list; a; a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1118 | if (a->pid == wpid) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1119 | /* Set the pid to 0 so that the process gets |
| 1120 | * restarted by run_actions() */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1121 | a->pid = 0; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1122 | message(LOG, "Process '%s' (pid %d) exited. " |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1123 | "Scheduling it for restart.", |
| 1124 | a->command, wpid); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1125 | } |
| 1126 | } |
Eric Andersen | cf1fee0 | 2002-12-17 09:48:16 +0000 | [diff] [blame] | 1127 | /* see if anyone else is waiting to be reaped */ |
Denis Vlasenko | ce97960 | 2006-09-27 23:31:08 +0000 | [diff] [blame] | 1128 | wpid = waitpid(-1, NULL, WNOHANG); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1129 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1130 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1131 | } |