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 |
| 176 | static inline void messageD(int ATTRIBUTE_UNUSED device, |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 177 | const char ATTRIBUTE_UNUSED *fmt, ...) |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 178 | { |
| 179 | } |
Eric Andersen | fedce06 | 2001-11-17 07:27:14 +0000 | [diff] [blame] | 180 | #endif |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 181 | static void message(int device, const char *fmt, ...) |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 182 | __attribute__ ((format(printf, 2, 3))); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 183 | static void message(int device, const char *fmt, ...) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 184 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 185 | va_list arguments; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 186 | int l; |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 187 | RESERVE_CONFIG_BUFFER(msg, 1024); |
Eric Andersen | 2223701 | 2003-01-23 07:08:26 +0000 | [diff] [blame] | 188 | #ifndef CONFIG_SYSLOGD |
| 189 | static int log_fd = -1; |
| 190 | #endif |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 191 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 192 | msg[0] = '\r'; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 193 | va_start(arguments, fmt); |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 194 | l = vsnprintf(msg + 1, 1024 - 2, fmt, arguments) + 1; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 195 | va_end(arguments); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 196 | |
| 197 | #ifdef CONFIG_SYSLOGD |
| 198 | /* Log the message to syslogd */ |
| 199 | if (device & LOG) { |
| 200 | /* don`t out "\r\n" */ |
Eric Andersen | 36adca8 | 2004-06-22 10:07:17 +0000 | [diff] [blame] | 201 | openlog(bb_applet_name, 0, LOG_DAEMON); |
"Vladimir N. Oleynik" | 8e1bd4a | 2005-09-29 12:55:21 +0000 | [diff] [blame] | 202 | syslog(LOG_INFO, "%s", msg + 1); |
Eric Andersen | 36adca8 | 2004-06-22 10:07:17 +0000 | [diff] [blame] | 203 | closelog(); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 204 | } |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 205 | |
| 206 | msg[l++] = '\n'; |
| 207 | msg[l] = 0; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 208 | #else |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 209 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 210 | msg[l++] = '\n'; |
| 211 | msg[l] = 0; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 212 | /* Take full control of the log tty, and never close it. |
| 213 | * It's mine, all mine! Muhahahaha! */ |
| 214 | if (log_fd < 0) { |
Mike Frysinger | e548bdf | 2005-07-06 04:46:14 +0000 | [diff] [blame] | 215 | 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] | 216 | log_fd = -2; |
Mike Frysinger | 72a4c33 | 2005-07-05 02:19:20 +0000 | [diff] [blame] | 217 | 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] | 218 | device = CONSOLE; |
Eric Andersen | 6a97990 | 2002-09-30 20:08:53 +0000 | [diff] [blame] | 219 | } else { |
| 220 | fcntl(log_fd, F_SETFD, FD_CLOEXEC); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 221 | } |
| 222 | } |
| 223 | if ((device & LOG) && (log_fd >= 0)) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 224 | bb_full_write(log_fd, msg, l); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 225 | } |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 226 | #endif |
| 227 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 228 | if (device & CONSOLE) { |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 229 | int fd = device_open(CONSOLE_DEV, |
Mike Frysinger | e548bdf | 2005-07-06 04:46:14 +0000 | [diff] [blame] | 230 | O_WRONLY | O_NOCTTY | O_NONBLOCK); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 231 | /* 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] | 232 | if (fd >= 0) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 233 | bb_full_write(fd, msg, l); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 234 | close(fd); |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 235 | #if ENABLE_DEBUG_INIT |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 236 | /* all descriptors may be closed */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 237 | } else { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 238 | bb_error_msg("Bummer, can't print: "); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 239 | va_start(arguments, fmt); |
| 240 | vfprintf(stderr, fmt, arguments); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 241 | va_end(arguments); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 242 | #endif |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 243 | } |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 244 | } |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 245 | RELEASE_CONFIG_BUFFER(msg); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 246 | } |
| 247 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 248 | /* Set terminal settings to reasonable defaults */ |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 249 | static void set_term(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 250 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 251 | struct termios tty; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 252 | |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 253 | tcgetattr(STDIN_FILENO, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 254 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 255 | /* set control chars */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 256 | tty.c_cc[VINTR] = 3; /* C-c */ |
| 257 | tty.c_cc[VQUIT] = 28; /* C-\ */ |
| 258 | tty.c_cc[VERASE] = 127; /* C-? */ |
| 259 | tty.c_cc[VKILL] = 21; /* C-u */ |
| 260 | tty.c_cc[VEOF] = 4; /* C-d */ |
Eric Andersen | 3849f9b | 2000-07-10 19:56:47 +0000 | [diff] [blame] | 261 | tty.c_cc[VSTART] = 17; /* C-q */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 262 | tty.c_cc[VSTOP] = 19; /* C-s */ |
| 263 | tty.c_cc[VSUSP] = 26; /* C-z */ |
Eric Andersen | 02bc25b | 2000-07-06 21:29:32 +0000 | [diff] [blame] | 264 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 265 | /* use line dicipline 0 */ |
| 266 | tty.c_line = 0; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 267 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 268 | /* Make it be sane */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 269 | tty.c_cflag &= CBAUD | CBAUDEX | CSIZE | CSTOPB | PARENB | PARODD; |
| 270 | tty.c_cflag |= CREAD | HUPCL | CLOCAL; |
Eric Andersen | d886292 | 2001-04-23 15:14:11 +0000 | [diff] [blame] | 271 | |
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 | /* input modes */ |
| 274 | tty.c_iflag = ICRNL | IXON | IXOFF; |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 275 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 276 | /* output modes */ |
| 277 | tty.c_oflag = OPOST | ONLCR; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 278 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 279 | /* local modes */ |
| 280 | tty.c_lflag = |
| 281 | ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 282 | |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 283 | tcsetattr(STDIN_FILENO, TCSANOW, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 284 | } |
| 285 | |
Eric Andersen | 74400cc | 2001-10-18 04:11:39 +0000 | [diff] [blame] | 286 | static void console_init(void) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 287 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 288 | int fd; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 289 | int tried = 0; |
Erik Andersen | 029011b | 2000-03-04 21:19:32 +0000 | [diff] [blame] | 290 | struct vt_stat vt; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 291 | struct serial_struct sr; |
| 292 | char *s; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 293 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 294 | if ((s = getenv("CONSOLE")) != NULL || (s = getenv("console")) != NULL) { |
Matt Kraai | 1844770 | 2001-05-18 21:24:58 +0000 | [diff] [blame] | 295 | safe_strncpy(console, s, sizeof(console)); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 296 | } else { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 297 | /* 2.2 kernels: identify the real console backend and try to use it */ |
| 298 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
| 299 | /* this is a serial console */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 300 | snprintf(console, sizeof(console) - 1, SC_FORMAT, sr.line); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 301 | } else if (ioctl(0, VT_GETSTATE, &vt) == 0) { |
| 302 | /* this is linux virtual tty */ |
Matt Kraai | 439e3df | 2001-07-23 14:52:08 +0000 | [diff] [blame] | 303 | snprintf(console, sizeof(console) - 1, VC_FORMAT, vt.v_active); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 304 | } else { |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 305 | safe_strncpy(console, CONSOLE_DEV, sizeof(console)); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 306 | tried++; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 307 | } |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 308 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 309 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 310 | while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0 && tried < 2) { |
| 311 | /* Can't open selected console -- try |
| 312 | logical system console and VT_MASTER */ |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 313 | safe_strncpy(console, (tried == 0 ? CONSOLE_DEV : CURRENT_VC), |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 314 | sizeof(console)); |
| 315 | tried++; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 316 | } |
| 317 | if (fd < 0) { |
| 318 | /* Perhaps we should panic here? */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 319 | #ifndef CONFIG_SYSLOGD |
Mike Frysinger | 72a4c33 | 2005-07-05 02:19:20 +0000 | [diff] [blame] | 320 | log_console = |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 321 | #endif |
"Vladimir N. Oleynik" | 6c35c7c | 2005-10-12 15:34:25 +0000 | [diff] [blame] | 322 | safe_strncpy(console, bb_dev_null, sizeof(console)); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 323 | } else { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 324 | s = getenv("TERM"); |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame] | 325 | /* check for serial console */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 326 | if (ioctl(fd, TIOCGSERIAL, &sr) == 0) { |
Erik Andersen | fa4718e | 2000-02-21 19:25:12 +0000 | [diff] [blame] | 327 | /* Force the TERM setting to vt102 for serial console -- |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame] | 328 | * if TERM is set to linux (the default) */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 329 | if (s == NULL || strcmp(s, "linux") == 0) |
| 330 | putenv("TERM=vt102"); |
| 331 | #ifndef CONFIG_SYSLOGD |
Mike Frysinger | 72a4c33 | 2005-07-05 02:19:20 +0000 | [diff] [blame] | 332 | log_console = console; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 333 | #endif |
| 334 | } else { |
| 335 | if (s == NULL) |
| 336 | putenv("TERM=linux"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 337 | } |
| 338 | close(fd); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 339 | } |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 340 | messageD(LOG, "console=%s", console); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 341 | } |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 342 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 343 | static void fixup_argv(int argc, char **argv, char *new_argv0) |
| 344 | { |
| 345 | int len; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 346 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 347 | /* Fix up argv[0] to be certain we claim to be init */ |
| 348 | len = strlen(argv[0]); |
| 349 | memset(argv[0], 0, len); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 350 | safe_strncpy(argv[0], new_argv0, len + 1); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 351 | |
| 352 | /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */ |
| 353 | len = 1; |
| 354 | while (argc > len) { |
| 355 | memset(argv[len], 0, strlen(argv[len])); |
| 356 | len++; |
| 357 | } |
| 358 | } |
| 359 | |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 360 | /* Open the new terminal device */ |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 361 | 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] | 362 | struct stat sb; |
| 363 | |
| 364 | if ((device_open(device, O_RDWR)) < 0) { |
| 365 | if (stat(device, &sb) != 0) { |
| 366 | message(LOG | CONSOLE, "device '%s' does not exist.", device); |
| 367 | } else { |
| 368 | message(LOG | CONSOLE, "Bummer, can't open %s", device); |
| 369 | } |
| 370 | if (fail) |
| 371 | _exit(1); |
| 372 | /* else */ |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 373 | #if !ENABLE_DEBUG_INIT |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 374 | shutdown_signal(SIGUSR1); |
Bernhard Reutner-Fischer | cf1f2ac | 2006-06-02 10:43:17 +0000 | [diff] [blame] | 375 | #else |
| 376 | _exit(2); |
| 377 | #endif |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 378 | } |
| 379 | } |
| 380 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 381 | static pid_t run(const struct init_action *a) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 382 | { |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 383 | int i; |
Mike Frysinger | 10427ab | 2005-07-06 05:00:48 +0000 | [diff] [blame] | 384 | pid_t pid; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 385 | char *s, *tmpCmd, *cmd[INIT_BUFFS_SIZE], *cmdpath; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 386 | char buf[INIT_BUFFS_SIZE + 6]; /* INIT_BUFFS_SIZE+strlen("exec ")+1 */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 387 | sigset_t nmask, omask; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 388 | static const char press_enter[] = |
| 389 | #ifdef CUSTOMIZED_BANNER |
| 390 | #include CUSTOMIZED_BANNER |
| 391 | #endif |
| 392 | "\nPlease press Enter to activate this console. "; |
Erik Andersen | ac6e71f | 2000-01-08 22:04:33 +0000 | [diff] [blame] | 393 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 394 | /* Block sigchild while forking. */ |
| 395 | sigemptyset(&nmask); |
| 396 | sigaddset(&nmask, SIGCHLD); |
| 397 | sigprocmask(SIG_BLOCK, &nmask, &omask); |
| 398 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 399 | if ((pid = fork()) == 0) { |
Mike Frysinger | 10427ab | 2005-07-06 05:00:48 +0000 | [diff] [blame] | 400 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 401 | /* Clean up */ |
| 402 | close(0); |
| 403 | close(1); |
| 404 | close(2); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 405 | sigprocmask(SIG_SETMASK, &omask, NULL); |
| 406 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 407 | /* Reset signal handlers that were set by the parent process */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 408 | signal(SIGUSR1, SIG_DFL); |
| 409 | signal(SIGUSR2, SIG_DFL); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 410 | signal(SIGINT, SIG_DFL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 411 | signal(SIGTERM, SIG_DFL); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 412 | signal(SIGHUP, SIG_DFL); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 413 | signal(SIGQUIT, SIG_DFL); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 414 | signal(SIGCONT, SIG_DFL); |
| 415 | signal(SIGSTOP, SIG_DFL); |
| 416 | signal(SIGTSTP, SIG_DFL); |
Eric Andersen | 2f6c04f | 1999-11-01 23:59:44 +0000 | [diff] [blame] | 417 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 418 | /* Create a new session and make ourself the process |
Eric Andersen | e8a90fb | 2002-10-12 04:05:48 +0000 | [diff] [blame] | 419 | * group leader */ |
| 420 | setsid(); |
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 | /* Open the new terminal device */ |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 423 | open_new_terminal(a->terminal, 1); |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 424 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 425 | /* Make sure the terminal will act fairly normal for us */ |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 426 | set_term(); |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 427 | /* Setup stdout, stderr for the new process so |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 428 | * they point to the supplied terminal */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 429 | dup(0); |
| 430 | dup(0); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 431 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 432 | /* If the init Action requires us to wait, then force the |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 433 | * supplied terminal to be the controlling tty. */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 434 | if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 435 | |
| 436 | /* Now fork off another process to just hang around */ |
| 437 | if ((pid = fork()) < 0) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 438 | message(LOG | CONSOLE, "Can't fork!"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 439 | _exit(1); |
| 440 | } |
| 441 | |
| 442 | if (pid > 0) { |
| 443 | |
| 444 | /* We are the parent -- wait till the child is done */ |
| 445 | signal(SIGINT, SIG_IGN); |
| 446 | signal(SIGTSTP, SIG_IGN); |
| 447 | signal(SIGQUIT, SIG_IGN); |
| 448 | signal(SIGCHLD, SIG_DFL); |
| 449 | |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 450 | waitfor(NULL, pid); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 451 | /* See if stealing the controlling tty back is necessary */ |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 452 | if (tcgetpgrp(0) != getpid()) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 453 | _exit(0); |
| 454 | |
| 455 | /* Use a temporary process to steal the controlling tty. */ |
| 456 | if ((pid = fork()) < 0) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 457 | message(LOG | CONSOLE, "Can't fork!"); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 458 | _exit(1); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 459 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 460 | if (pid == 0) { |
| 461 | setsid(); |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 462 | ioctl(0, TIOCSCTTY, 1); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 463 | _exit(0); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 464 | } |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 465 | waitfor(NULL, pid); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 466 | _exit(0); |
| 467 | } |
| 468 | |
| 469 | /* Now fall though to actually execute things */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 470 | } |
| 471 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 472 | /* See if any special /bin/sh requiring characters are present */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 473 | if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) { |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 474 | cmd[0] = (char *)DEFAULT_SHELL; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 475 | cmd[1] = "-c"; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 476 | cmd[2] = strcat(strcpy(buf, "exec "), a->command); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 477 | cmd[3] = NULL; |
| 478 | } else { |
| 479 | /* Convert command (char*) into cmd (char**, one word per string) */ |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 480 | strcpy(buf, a->command); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 481 | s = buf; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 482 | for (tmpCmd = buf, i = 0; (tmpCmd = strsep(&s, " \t")) != NULL;) { |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 483 | if (*tmpCmd != '\0') { |
| 484 | cmd[i] = tmpCmd; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 485 | i++; |
| 486 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 487 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 488 | cmd[i] = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 489 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 490 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 491 | cmdpath = cmd[0]; |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 492 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 493 | /* |
| 494 | Interactive shells want to see a dash in argv[0]. This |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 495 | typically is handled by login, argv will be setup this |
| 496 | way if a dash appears at the front of the command path |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 497 | (like "-/bin/sh"). |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 498 | */ |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 499 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 500 | if (*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 | /* skip over the dash */ |
| 503 | ++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 | /* find the last component in the command pathname */ |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 506 | s = bb_get_last_path_component(cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 507 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 508 | /* make a new argv[0] */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 509 | if ((cmd[0] = malloc(strlen(s) + 2)) == NULL) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 510 | message(LOG | CONSOLE, bb_msg_memory_exhausted); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 511 | cmd[0] = cmdpath; |
| 512 | } else { |
| 513 | cmd[0][0] = '-'; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 514 | strcpy(cmd[0] + 1, s); |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 515 | } |
Paul Fox | 41a72ec | 2005-08-01 16:43:13 +0000 | [diff] [blame] | 516 | #ifdef CONFIG_FEATURE_INIT_SCTTY |
| 517 | /* Establish this process as session leader and |
| 518 | * (attempt) to make the tty (if any) a controlling tty. |
| 519 | */ |
| 520 | (void) setsid(); |
| 521 | (void) ioctl(0, TIOCSCTTY, 0/*don't steal it*/); |
| 522 | #endif |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 523 | } |
| 524 | |
Eric Andersen | 1f50e84 | 2004-08-16 09:29:42 +0000 | [diff] [blame] | 525 | #if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__) |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 526 | if (a->action & ASKFIRST) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 527 | char c; |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 528 | /* |
| 529 | * Save memory by not exec-ing anything large (like a shell) |
| 530 | * before the user wants it. This is critical if swap is not |
| 531 | * enabled and the system has low memory. Generally this will |
| 532 | * be run on the second virtual console, and the first will |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 533 | * be allowed to start a shell or whatever an init script |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 534 | * specifies. |
| 535 | */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 536 | messageD(LOG, "Waiting for enter to start '%s'" |
| 537 | "(pid %d, terminal %s)\n", |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 538 | cmdpath, getpid(), a->terminal); |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 539 | bb_full_write(1, press_enter, sizeof(press_enter) - 1); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 540 | while(read(0, &c, 1) == 1 && c != '\n') |
| 541 | ; |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 542 | } |
Eric Andersen | 1f50e84 | 2004-08-16 09:29:42 +0000 | [diff] [blame] | 543 | #endif |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 544 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 545 | /* Log the process name and args */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 546 | message(LOG, "Starting pid %d, console %s: '%s'", |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 547 | getpid(), a->terminal, cmdpath); |
Eric Andersen | 7e3bf6e | 2000-09-14 22:01:31 +0000 | [diff] [blame] | 548 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 549 | #if defined CONFIG_FEATURE_INIT_COREDUMPS |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 550 | { |
| 551 | struct stat sb; |
| 552 | if (stat(CORE_ENABLE_FLAG_FILE, &sb) == 0) { |
| 553 | struct rlimit limit; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 554 | |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 555 | limit.rlim_cur = RLIM_INFINITY; |
| 556 | limit.rlim_max = RLIM_INFINITY; |
| 557 | setrlimit(RLIMIT_CORE, &limit); |
| 558 | } |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 559 | } |
Erik Andersen | 183da4a | 2000-04-04 18:36:37 +0000 | [diff] [blame] | 560 | #endif |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 561 | |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 562 | /* Now run it. The new program will take over this PID, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 563 | * so nothing further in init.c should be run. */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 564 | execv(cmdpath, cmd); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 565 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 566 | /* We're still here? Some error happened. */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 567 | message(LOG | CONSOLE, "Bummer, could not run '%s': %m", cmdpath); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 568 | _exit(-1); |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 569 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 570 | sigprocmask(SIG_SETMASK, &omask, NULL); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 571 | return pid; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 572 | } |
| 573 | |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 574 | static int waitfor(const struct init_action *a, pid_t pid) |
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 | int runpid; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 577 | int status, wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 578 | |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 579 | runpid = (NULL == a)? pid : run(a); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 580 | while (1) { |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 581 | wpid = waitpid(runpid,&status,0); |
| 582 | if (wpid == runpid) |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 583 | break; |
Glenn L McGrath | e6ba16f | 2003-09-26 10:45:55 +0000 | [diff] [blame] | 584 | if (wpid == -1 && errno == ECHILD) { |
| 585 | /* we missed its termination */ |
| 586 | break; |
| 587 | } |
| 588 | /* FIXME other errors should maybe trigger an error, but allow |
| 589 | * the program to continue */ |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 590 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 591 | return wpid; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 592 | } |
| 593 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 594 | /* Run all commands of a particular type */ |
| 595 | static void run_actions(int action) |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 596 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 597 | struct init_action *a, *tmp; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 598 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 599 | for (a = init_action_list; a; a = tmp) { |
| 600 | tmp = a->next; |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 601 | if (a->action == action) { |
Rob Landley | 2dd4279 | 2006-03-22 17:39:13 +0000 | [diff] [blame] | 602 | if (access(a->terminal, R_OK | W_OK)) { |
| 603 | delete_init_action(a); |
| 604 | } else if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) { |
Bernhard Reutner-Fischer | 3ab3080 | 2006-05-30 12:10:29 +0000 | [diff] [blame] | 605 | waitfor(a, 0); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 606 | delete_init_action(a); |
| 607 | } else if (a->action & ONCE) { |
| 608 | run(a); |
| 609 | delete_init_action(a); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 610 | } else if (a->action & (RESPAWN | ASKFIRST)) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 611 | /* Only run stuff with pid==0. If they have |
| 612 | * a pid, that means it is still running */ |
| 613 | if (a->pid == 0) { |
| 614 | a->pid = run(a); |
| 615 | } |
| 616 | } |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 617 | } |
| 618 | } |
| 619 | } |
| 620 | |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 621 | #if !ENABLE_DEBUG_INIT |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 622 | static void init_reboot(unsigned long magic) |
| 623 | { |
| 624 | pid_t pid; |
| 625 | /* 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] | 626 | * linux/kernel/sys.c, which can cause the machine to panic when |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 627 | * the init process is killed.... */ |
| 628 | if ((pid = fork()) == 0) { |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 629 | reboot(magic); |
Eric Andersen | 2c1de61 | 2003-04-24 11:41:28 +0000 | [diff] [blame] | 630 | _exit(0); |
| 631 | } |
| 632 | waitpid (pid, NULL, 0); |
| 633 | } |
| 634 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 635 | static void shutdown_system(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 636 | { |
Eric Andersen | 813d88c | 2001-10-28 22:49:48 +0000 | [diff] [blame] | 637 | sigset_t block_signals; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 638 | |
Eric Andersen | a9cc896 | 2002-09-16 06:49:06 +0000 | [diff] [blame] | 639 | /* run everything to be run at "shutdown". This is done _prior_ |
| 640 | * to killing everything, in case people wish to use scripts to |
| 641 | * shut things down gracefully... */ |
| 642 | run_actions(SHUTDOWN); |
| 643 | |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 644 | /* first disable all our signals */ |
| 645 | sigemptyset(&block_signals); |
| 646 | sigaddset(&block_signals, SIGHUP); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 647 | sigaddset(&block_signals, SIGQUIT); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 648 | sigaddset(&block_signals, SIGCHLD); |
| 649 | sigaddset(&block_signals, SIGUSR1); |
| 650 | sigaddset(&block_signals, SIGUSR2); |
| 651 | sigaddset(&block_signals, SIGINT); |
| 652 | sigaddset(&block_signals, SIGTERM); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 653 | sigaddset(&block_signals, SIGCONT); |
| 654 | sigaddset(&block_signals, SIGSTOP); |
| 655 | sigaddset(&block_signals, SIGTSTP); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 656 | sigprocmask(SIG_BLOCK, &block_signals, NULL); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 657 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 658 | /* Allow Ctrl-Alt-Del to reboot system. */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 659 | init_reboot(RB_ENABLE_CAD); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 660 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 661 | message(CONSOLE | LOG, "The system is going down NOW !!"); |
Eric Andersen | cf8c9cf | 1999-11-05 00:31:46 +0000 | [diff] [blame] | 662 | sync(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 663 | |
| 664 | /* Send signals to every process _except_ pid 1 */ |
Bernhard Reutner-Fischer | 7ae1553 | 2006-05-30 18:17:21 +0000 | [diff] [blame] | 665 | message(CONSOLE | LOG, init_sending_format, "TERM"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 666 | kill(-1, SIGTERM); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 667 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 668 | sync(); |
| 669 | |
Bernhard Reutner-Fischer | 7ae1553 | 2006-05-30 18:17:21 +0000 | [diff] [blame] | 670 | message(CONSOLE | LOG, init_sending_format, "KILL"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 671 | kill(-1, SIGKILL); |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 672 | sleep(1); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 673 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 674 | sync(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 675 | } |
| 676 | |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 677 | static void exec_signal(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 678 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 679 | struct init_action *a, *tmp; |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 680 | sigset_t unblock_signals; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 681 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 682 | for (a = init_action_list; a; a = tmp) { |
| 683 | tmp = a->next; |
| 684 | if (a->action & RESTART) { |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 685 | shutdown_system(); |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 686 | |
| 687 | /* unblock all signals, blocked in shutdown_system() */ |
| 688 | sigemptyset(&unblock_signals); |
| 689 | sigaddset(&unblock_signals, SIGHUP); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 690 | sigaddset(&unblock_signals, SIGQUIT); |
Eric Andersen | 5222d31 | 2002-07-03 05:15:23 +0000 | [diff] [blame] | 691 | sigaddset(&unblock_signals, SIGCHLD); |
| 692 | sigaddset(&unblock_signals, SIGUSR1); |
| 693 | sigaddset(&unblock_signals, SIGUSR2); |
| 694 | sigaddset(&unblock_signals, SIGINT); |
| 695 | sigaddset(&unblock_signals, SIGTERM); |
| 696 | sigaddset(&unblock_signals, SIGCONT); |
| 697 | sigaddset(&unblock_signals, SIGSTOP); |
| 698 | sigaddset(&unblock_signals, SIGTSTP); |
| 699 | sigprocmask(SIG_UNBLOCK, &unblock_signals, NULL); |
| 700 | |
Eric Andersen | 9cdef5d | 2003-07-29 06:33:12 +0000 | [diff] [blame] | 701 | /* Close whatever files are open. */ |
| 702 | close(0); |
| 703 | close(1); |
| 704 | close(2); |
| 705 | |
Eric Andersen | 3c8064f | 2003-07-05 08:29:01 +0000 | [diff] [blame] | 706 | /* Open the new terminal device */ |
Bernhard Reutner-Fischer | 0da069d | 2006-05-29 12:54:16 +0000 | [diff] [blame] | 707 | open_new_terminal(a->terminal, 0); |
Eric Andersen | 3c8064f | 2003-07-05 08:29:01 +0000 | [diff] [blame] | 708 | |
| 709 | /* Make sure the terminal will act fairly normal for us */ |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 710 | set_term(); |
Eric Andersen | 3c8064f | 2003-07-05 08:29:01 +0000 | [diff] [blame] | 711 | /* Setup stdout, stderr on the supplied terminal */ |
| 712 | dup(0); |
| 713 | dup(0); |
| 714 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 715 | messageD(CONSOLE | LOG, "Trying to re-exec %s", a->command); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 716 | execl(a->command, a->command, NULL); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 717 | |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 718 | message(CONSOLE | LOG, "exec of '%s' failed: %m", |
Eric Andersen | 71ae64b | 2002-10-10 04:20:21 +0000 | [diff] [blame] | 719 | a->command); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 720 | sync(); |
| 721 | sleep(2); |
| 722 | init_reboot(RB_HALT_SYSTEM); |
| 723 | loop_forever(); |
| 724 | } |
| 725 | } |
| 726 | } |
| 727 | |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 728 | static void shutdown_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 729 | { |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 730 | char *m; |
| 731 | int rb; |
| 732 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 733 | shutdown_system(); |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 734 | |
| 735 | if (sig == SIGTERM) { |
| 736 | m = "reboot"; |
| 737 | rb = RB_AUTOBOOT; |
| 738 | } else if (sig == SIGUSR2) { |
| 739 | m = "poweroff"; |
| 740 | rb = RB_POWER_OFF; |
| 741 | } else { |
| 742 | m = "halt"; |
| 743 | rb = RB_HALT_SYSTEM; |
| 744 | } |
| 745 | message(CONSOLE | LOG, "Requesting system %s.", m); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 746 | sync(); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 747 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 748 | /* allow time for last message to reach serial console */ |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 749 | sleep(2); |
Erik Andersen | 3fe39dc | 2000-01-25 18:13:53 +0000 | [diff] [blame] | 750 | |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 751 | init_reboot(rb); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 752 | |
| 753 | loop_forever(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 754 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 755 | |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 756 | static void ctrlaltdel_signal(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 757 | { |
| 758 | run_actions(CTRLALTDEL); |
| 759 | } |
| 760 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 761 | /* The SIGSTOP & SIGTSTP handler */ |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 762 | static void stop_handler(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 763 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 764 | int saved_errno = errno; |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 765 | |
| 766 | got_cont = 0; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 767 | while (!got_cont) |
| 768 | pause(); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 769 | got_cont = 0; |
| 770 | errno = saved_errno; |
| 771 | } |
| 772 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 773 | /* The SIGCONT handler */ |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 774 | static void cont_handler(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 775 | { |
| 776 | got_cont = 1; |
| 777 | } |
| 778 | |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 779 | #endif /* ! ENABLE_DEBUG_INIT */ |
Erik Andersen | de55287 | 2000-01-23 01:34:05 +0000 | [diff] [blame] | 780 | |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 781 | 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] | 782 | { |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 783 | struct init_action *new_action, *a, *last; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 784 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 785 | if (*cons == '\0') |
| 786 | cons = console; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 787 | |
"Vladimir N. Oleynik" | 6c35c7c | 2005-10-12 15:34:25 +0000 | [diff] [blame] | 788 | if (strcmp(cons, bb_dev_null) == 0 && (action & ASKFIRST)) |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 789 | return; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 790 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 791 | new_action = calloc((size_t) (1), sizeof(struct init_action)); |
| 792 | if (!new_action) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 793 | message(LOG | CONSOLE, "Memory allocation failure"); |
Matt Kraai | 67a4640 | 2001-06-03 05:55:52 +0000 | [diff] [blame] | 794 | loop_forever(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 795 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 796 | |
| 797 | /* Append to the end of the list */ |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 798 | for (a = last = init_action_list; a; a = a->next) { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 799 | /* don't enter action if it's already in the list, |
| 800 | * but do overwrite existing actions */ |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 801 | if ((strcmp(a->command, command) == 0) && |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 802 | (strcmp(a->terminal, cons) ==0)) { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 803 | a->action = action; |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 804 | free(new_action); |
| 805 | return; |
| 806 | } |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 807 | last = a; |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 808 | } |
Eric Andersen | 2271809 | 2004-10-08 08:17:39 +0000 | [diff] [blame] | 809 | if (last) { |
| 810 | last->next = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 811 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 812 | init_action_list = new_action; |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 813 | } |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 814 | strcpy(new_action->command, command); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 815 | new_action->action = action; |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 816 | strcpy(new_action->terminal, cons); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 817 | messageD(LOG|CONSOLE, "command='%s' action='%d' terminal='%s'\n", |
| 818 | new_action->command, new_action->action, new_action->terminal); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 819 | } |
| 820 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 821 | static void delete_init_action(struct init_action *action) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 822 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 823 | struct init_action *a, *b = NULL; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 824 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 825 | for (a = init_action_list; a; b = a, a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 826 | if (a == action) { |
| 827 | if (b == NULL) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 828 | init_action_list = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 829 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 830 | b->next = a->next; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 831 | } |
| 832 | free(a); |
| 833 | break; |
| 834 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 835 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 836 | } |
| 837 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 838 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 839 | * then parse_inittab() simply adds in some default |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 840 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
| 841 | * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB |
| 842 | * _is_ defined, but /etc/inittab is missing, this |
Erik Andersen | 812d466 | 2000-01-07 18:30:40 +0000 | [diff] [blame] | 843 | * results in the same set of default behaviors. |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 844 | */ |
Eric Andersen | 3e6ff90 | 2001-03-09 21:24:12 +0000 | [diff] [blame] | 845 | static void parse_inittab(void) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 846 | { |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 847 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 848 | FILE *file; |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 849 | char buf[INIT_BUFFS_SIZE], lineAsRead[INIT_BUFFS_SIZE]; |
| 850 | char tmpConsole[CONSOLE_BUFF_SIZE]; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 851 | char *id, *runlev, *action, *command, *eol; |
| 852 | const struct init_action_type *a = actions; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 853 | |
| 854 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 855 | file = fopen(INITTAB, "r"); |
| 856 | if (file == NULL) { |
| 857 | /* No inittab file -- set up some default behavior */ |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 858 | #endif |
Eric Andersen | c97ec34 | 2001-04-03 18:01:51 +0000 | [diff] [blame] | 859 | /* Reboot on Ctrl-Alt-Del */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 860 | new_init_action(CTRLALTDEL, "/sbin/reboot", ""); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 861 | /* Umount all filesystems on halt/reboot */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 862 | new_init_action(SHUTDOWN, "/bin/umount -a -r", ""); |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 863 | /* Swapoff on halt/reboot */ |
Rob Landley | 7a8f679 | 2005-08-30 18:17:05 +0000 | [diff] [blame] | 864 | if(ENABLE_SWAPONOFF) new_init_action(SHUTDOWN, "/sbin/swapoff -a", ""); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 865 | /* Prepare to restart init when a HUP is received */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 866 | new_init_action(RESTART, "/sbin/init", ""); |
Eric Andersen | 3bc2b20 | 2002-07-29 06:39:58 +0000 | [diff] [blame] | 867 | /* Askfirst shell on tty1-4 */ |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 868 | new_init_action(ASKFIRST, bb_default_login_shell, ""); |
| 869 | new_init_action(ASKFIRST, bb_default_login_shell, VC_2); |
| 870 | new_init_action(ASKFIRST, bb_default_login_shell, VC_3); |
| 871 | new_init_action(ASKFIRST, bb_default_login_shell, VC_4); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 872 | /* sysinit */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 873 | new_init_action(SYSINIT, INIT_SCRIPT, ""); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 874 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 875 | return; |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 876 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 877 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 878 | |
Eric Andersen | 0826b6b | 2002-07-03 23:50:16 +0000 | [diff] [blame] | 879 | while (fgets(buf, INIT_BUFFS_SIZE, file) != NULL) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 880 | /* Skip leading spaces */ |
| 881 | for (id = buf; *id == ' ' || *id == '\t'; id++); |
| 882 | |
| 883 | /* Skip the line if it's a comment */ |
| 884 | if (*id == '#' || *id == '\n') |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 885 | continue; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 886 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 887 | /* Trim the trailing \n */ |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 888 | eol = strrchr(id, '\n'); |
| 889 | if (eol != NULL) |
| 890 | *eol = '\0'; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 891 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 892 | /* Keep a copy around for posterity's sake (and error msgs) */ |
| 893 | strcpy(lineAsRead, buf); |
| 894 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 895 | /* Separate the ID field from the runlevels */ |
| 896 | runlev = strchr(id, ':'); |
| 897 | if (runlev == NULL || *(runlev + 1) == '\0') { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 898 | message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 899 | continue; |
| 900 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 901 | *runlev = '\0'; |
| 902 | ++runlev; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 903 | } |
| 904 | |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 905 | /* Separate the runlevels from the action */ |
| 906 | action = strchr(runlev, ':'); |
| 907 | if (action == NULL || *(action + 1) == '\0') { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 908 | message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 909 | continue; |
| 910 | } else { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 911 | *action = '\0'; |
| 912 | ++action; |
| 913 | } |
| 914 | |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 915 | /* Separate the action from the command */ |
| 916 | command = strchr(action, ':'); |
| 917 | if (command == NULL || *(command + 1) == '\0') { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 918 | message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 919 | continue; |
| 920 | } else { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 921 | *command = '\0'; |
| 922 | ++command; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 923 | } |
| 924 | |
| 925 | /* Ok, now process it */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 926 | for (a = actions; a->name != 0; a++) { |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 927 | if (strcmp(a->name, action) == 0) { |
| 928 | if (*id != '\0') { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 929 | if(strncmp(id, "/dev/", 5) == 0) |
| 930 | id += 5; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 931 | strcpy(tmpConsole, "/dev/"); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 932 | safe_strncpy(tmpConsole + 5, id, |
| 933 | CONSOLE_BUFF_SIZE - 5); |
Eric Andersen | b596636 | 2000-05-31 20:04:38 +0000 | [diff] [blame] | 934 | id = tmpConsole; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 935 | } |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 936 | new_init_action(a->action, command, id); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 937 | break; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 938 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 939 | } |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 940 | if (a->name == 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 941 | /* Choke on an unknown action */ |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 942 | message(LOG | CONSOLE, "Bad inittab entry: %s", lineAsRead); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 943 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 944 | } |
Eric Andersen | d8636ca | 2002-05-15 22:19:09 +0000 | [diff] [blame] | 945 | fclose(file); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 946 | return; |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 947 | #endif /* CONFIG_FEATURE_USE_INITTAB */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 948 | } |
| 949 | |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 950 | #ifdef CONFIG_FEATURE_USE_INITTAB |
"Vladimir N. Oleynik" | 1f04c9d | 2006-02-01 14:47:52 +0000 | [diff] [blame] | 951 | static void reload_signal(int sig ATTRIBUTE_UNUSED) |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 952 | { |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 953 | struct init_action *a, *tmp; |
| 954 | |
| 955 | message(LOG, "Reloading /etc/inittab"); |
| 956 | |
| 957 | /* disable old entrys */ |
| 958 | for (a = init_action_list; a; a = a->next ) { |
| 959 | a->action = ONCE; |
| 960 | } |
| 961 | |
| 962 | parse_inittab(); |
| 963 | |
| 964 | /* remove unused entrys */ |
| 965 | for (a = init_action_list; a; a = tmp) { |
| 966 | tmp = a->next; |
| 967 | if (a->action & (ONCE | SYSINIT | WAIT ) && |
| 968 | a->pid == 0 ) { |
| 969 | delete_init_action(a); |
| 970 | } |
| 971 | } |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 972 | run_actions(RESPAWN); |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 973 | return; |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 974 | } |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 975 | #endif /* CONFIG_FEATURE_USE_INITTAB */ |
| 976 | |
Rob Landley | dfba741 | 2006-03-06 20:47:33 +0000 | [diff] [blame] | 977 | int init_main(int argc, char **argv) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 978 | { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 979 | struct init_action *a; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 980 | pid_t wpid; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 981 | |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 982 | if (argc > 1 && !strcmp(argv[1], "-q")) { |
Rob Landley | 2edf526 | 2006-01-22 02:41:51 +0000 | [diff] [blame] | 983 | return kill(1,SIGHUP); |
Eric Andersen | 730f826 | 2001-12-17 23:13:08 +0000 | [diff] [blame] | 984 | } |
Bernhard Reutner-Fischer | 35e1a07 | 2006-05-29 13:08:35 +0000 | [diff] [blame] | 985 | #if !ENABLE_DEBUG_INIT |
Erik Andersen | a51ecdd | 2000-02-24 18:09:58 +0000 | [diff] [blame] | 986 | /* 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] | 987 | if (getpid() != 1 && |
| 988 | (!ENABLE_FEATURE_INITRD || !strstr(bb_applet_name, "linuxrc"))) |
| 989 | { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 990 | bb_show_usage(); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 991 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 992 | /* Set up sig handlers -- be sure to |
| 993 | * clear all of these in run() */ |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 994 | signal(SIGHUP, exec_signal); |
Mike Frysinger | a77b4f3 | 2005-04-16 08:21:34 +0000 | [diff] [blame] | 995 | signal(SIGQUIT, exec_signal); |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 996 | signal(SIGUSR1, shutdown_signal); |
| 997 | signal(SIGUSR2, shutdown_signal); |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 998 | signal(SIGINT, ctrlaltdel_signal); |
Paul Fox | d112f8f | 2006-06-01 13:17:49 +0000 | [diff] [blame] | 999 | signal(SIGTERM, shutdown_signal); |
Eric Andersen | ed8a9be | 2001-11-30 19:10:58 +0000 | [diff] [blame] | 1000 | signal(SIGCONT, cont_handler); |
| 1001 | signal(SIGSTOP, stop_handler); |
| 1002 | signal(SIGTSTP, stop_handler); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 1003 | |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 1004 | /* Turn off rebooting via CTL-ALT-DEL -- we get a |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1005 | * SIGINT on CAD so we can shut things down gracefully... */ |
Erik Andersen | 4f3f757 | 2000-04-28 00:18:56 +0000 | [diff] [blame] | 1006 | init_reboot(RB_DISABLE_CAD); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1007 | #endif |
Erik Andersen | 05df239 | 2000-01-13 04:43:48 +0000 | [diff] [blame] | 1008 | |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 1009 | /* Figure out where the default console should be */ |
| 1010 | console_init(); |
| 1011 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1012 | /* Close whatever files are open, and reset the console. */ |
| 1013 | close(0); |
| 1014 | close(1); |
| 1015 | close(2); |
Eric Andersen | 72f9a42 | 2001-10-28 05:12:20 +0000 | [diff] [blame] | 1016 | |
Glenn L McGrath | baf55a8 | 2002-08-22 18:22:10 +0000 | [diff] [blame] | 1017 | if (device_open(console, O_RDWR | O_NOCTTY) == 0) { |
Bernhard Reutner-Fischer | 49e60b9 | 2006-05-29 12:57:52 +0000 | [diff] [blame] | 1018 | set_term(); |
Eric Andersen | 599e3ce | 2002-07-03 11:08:10 +0000 | [diff] [blame] | 1019 | close(0); |
| 1020 | } |
| 1021 | |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1022 | chdir("/"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1023 | setsid(); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1024 | { |
| 1025 | const char * const *e; |
| 1026 | /* Make sure environs is set to something sane */ |
| 1027 | for(e = environment; *e; e++) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1028 | putenv((char *) *e); |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1029 | } |
Rob Landley | cba1b96 | 2006-07-09 17:28:17 +0000 | [diff] [blame^] | 1030 | |
| 1031 | if (argc > 1) setenv("RUNLEVEL", argv[1], 1); |
| 1032 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1033 | /* Hello world */ |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1034 | message(MAYBE_CONSOLE | LOG, "init started: %s", bb_msg_full_version); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1035 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1036 | /* Make sure there is enough memory to do something useful. */ |
Rob Landley | c3386a4 | 2005-08-30 18:50:37 +0000 | [diff] [blame] | 1037 | if (ENABLE_SWAPONOFF) { |
| 1038 | struct sysinfo info; |
| 1039 | |
| 1040 | if (!sysinfo(&info) && |
| 1041 | (info.mem_unit ? : 1) * (long long)info.totalram < MEGABYTE) |
| 1042 | { |
| 1043 | message(CONSOLE,"Low memory: forcing swapon."); |
| 1044 | /* swapon -a requires /proc typically */ |
| 1045 | new_init_action(SYSINIT, "/bin/mount -t proc proc /proc", ""); |
| 1046 | /* Try to turn on swap */ |
| 1047 | new_init_action(SYSINIT, "/sbin/swapon -a", ""); |
| 1048 | run_actions(SYSINIT); /* wait and removing */ |
| 1049 | } |
| 1050 | } |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 1051 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1052 | /* Check if we are supposed to be in single user mode */ |
| 1053 | if (argc > 1 && (!strcmp(argv[1], "single") || |
| 1054 | !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) { |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1055 | /* Start a shell on console */ |
Glenn L McGrath | dc4e75e | 2003-09-02 02:36:18 +0000 | [diff] [blame] | 1056 | new_init_action(RESPAWN, bb_default_login_shell, ""); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1057 | } else { |
| 1058 | /* Not in single user mode -- see what inittab says */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 1059 | |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 1060 | /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1061 | * then parse_inittab() simply adds in some default |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 1062 | * actions(i.e., runs INIT_SCRIPT and then starts a pair |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1063 | * of "askfirst" shells */ |
| 1064 | parse_inittab(); |
Eric Andersen | d00c262 | 1999-12-07 08:37:31 +0000 | [diff] [blame] | 1065 | } |
Erik Andersen | 983b51b | 2000-04-04 18:14:25 +0000 | [diff] [blame] | 1066 | |
Rob Landley | b3ede5a | 2006-03-27 23:09:12 +0000 | [diff] [blame] | 1067 | #ifdef CONFIG_SELINUX |
| 1068 | if (getenv("SELINUX_INIT") == NULL) { |
| 1069 | int enforce = 0; |
| 1070 | |
| 1071 | putenv("SELINUX_INIT=YES"); |
| 1072 | if (selinux_init_load_policy(&enforce) == 0) { |
| 1073 | execv(argv[0], argv); |
| 1074 | } else if (enforce > 0) { |
| 1075 | /* SELinux in enforcing mode but load_policy failed */ |
| 1076 | /* At this point, we probably can't open /dev/console, so log() won't work */ |
| 1077 | message(CONSOLE,"Unable to load SELinux Policy. Machine is in enforcing mode. Halting now."); |
| 1078 | exit(1); |
| 1079 | } |
| 1080 | } |
| 1081 | #endif /* CONFIG_SELINUX */ |
| 1082 | |
Eric Andersen | 7ef1a5b | 2001-03-20 17:39:08 +0000 | [diff] [blame] | 1083 | /* Make the command line just say "init" -- thats all, nothing else */ |
| 1084 | fixup_argv(argc, argv, "init"); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 1085 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1086 | /* Now run everything that needs to be run */ |
| 1087 | |
| 1088 | /* First run the sysinit command */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1089 | run_actions(SYSINIT); |
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 that wants to block */ |
Eric Andersen | 1644db9 | 2001-09-05 20:18:15 +0000 | [diff] [blame] | 1092 | run_actions(WAIT); |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1093 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1094 | /* Next run anything to be run only once */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1095 | run_actions(ONCE); |
| 1096 | |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 1097 | #ifdef CONFIG_FEATURE_USE_INITTAB |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 1098 | /* Redefine SIGHUP to reread /etc/inittab */ |
| 1099 | signal(SIGHUP, reload_signal); |
Eric Andersen | 82baf63 | 2004-10-08 08:21:54 +0000 | [diff] [blame] | 1100 | #else |
| 1101 | signal(SIGHUP, SIG_IGN); |
| 1102 | #endif /* CONFIG_FEATURE_USE_INITTAB */ |
| 1103 | |
Eric Andersen | 6fd0e31 | 2003-07-22 09:48:56 +0000 | [diff] [blame] | 1104 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1105 | /* Now run the looping stuff for the rest of forever */ |
| 1106 | while (1) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1107 | /* run the respawn stuff */ |
| 1108 | run_actions(RESPAWN); |
| 1109 | |
| 1110 | /* run the askfirst stuff */ |
| 1111 | run_actions(ASKFIRST); |
| 1112 | |
| 1113 | /* Don't consume all CPU time -- sleep a bit */ |
| 1114 | sleep(1); |
| 1115 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1116 | /* Wait for a child process to exit */ |
Bernhard Reutner-Fischer | c58dbf2 | 2006-05-30 12:16:54 +0000 | [diff] [blame] | 1117 | wpid = wait(NULL); |
Eric Andersen | 87812dc | 2004-04-12 19:21:54 +0000 | [diff] [blame] | 1118 | while (wpid > 0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1119 | /* Find out who died and clean up their corpse */ |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1120 | for (a = init_action_list; a; a = a->next) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1121 | if (a->pid == wpid) { |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1122 | /* Set the pid to 0 so that the process gets |
| 1123 | * restarted by run_actions() */ |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1124 | a->pid = 0; |
Eric Andersen | 0298be8 | 2002-03-05 15:12:19 +0000 | [diff] [blame] | 1125 | message(LOG, "Process '%s' (pid %d) exited. " |
Glenn L McGrath | b4a1baa | 2003-01-13 22:09:50 +0000 | [diff] [blame] | 1126 | "Scheduling it for restart.", |
| 1127 | a->command, wpid); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1128 | } |
| 1129 | } |
Eric Andersen | cf1fee0 | 2002-12-17 09:48:16 +0000 | [diff] [blame] | 1130 | /* see if anyone else is waiting to be reaped */ |
Bernhard Reutner-Fischer | c58dbf2 | 2006-05-30 12:16:54 +0000 | [diff] [blame] | 1131 | wpid = waitpid (-1, NULL, WNOHANG); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1132 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1133 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1134 | } |