blob: 2e2f855776bfc868211d03a1d4df1861e91f1db7 [file] [log] [blame]
Erik Andersenccc74882000-01-27 02:40:21 +00001/* vi: set sw=4 ts=4: */
Eric Andersenc4996011999-10-20 22:08:37 +00002/*
3 * Mini init implementation for busybox
4 *
Eric Andersenc4996011999-10-20 22:08:37 +00005 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
Eric Andersen1d1d2f92002-04-13 08:31:59 +00006 * Copyright (C) 1999-2002 by Erik Andersen <andersee@debian.org>
Eric Andersenc4996011999-10-20 22:08:37 +00007 * Adjusted by so many folks, it's impossible to keep track.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
Erik Andersene132f4b2000-02-09 04:16:43 +000025/* Turn this on to disable all the dangerous
26 rebooting stuff when debugging.
27#define DEBUG_INIT
28*/
29
Erik Andersen4f3f7572000-04-28 00:18:56 +000030#include <stdio.h>
31#include <stdlib.h>
Eric Andersencc8ed391999-10-05 16:24:54 +000032#include <errno.h>
Eric Andersenb186d981999-12-03 09:19:54 +000033#include <paths.h>
Erik Andersen42094cd2000-03-20 21:34:52 +000034#include <signal.h>
35#include <stdarg.h>
Eric Andersencc8ed391999-10-05 16:24:54 +000036#include <string.h>
Erik Andersen4f3f7572000-04-28 00:18:56 +000037#include <termios.h>
38#include <unistd.h>
Eric Andersened3ef502001-01-27 08:24:39 +000039#include <limits.h>
Erik Andersen42094cd2000-03-20 21:34:52 +000040#include <sys/fcntl.h>
41#include <sys/ioctl.h>
Eric Andersencc8ed391999-10-05 16:24:54 +000042#include <sys/mount.h>
Erik Andersen42094cd2000-03-20 21:34:52 +000043#include <sys/types.h>
Erik Andersen42094cd2000-03-20 21:34:52 +000044#include <sys/wait.h>
Eric Andersencbe31da2001-02-20 06:14:08 +000045#include "busybox.h"
Eric Andersenbdfd0d72001-10-24 05:00:29 +000046#ifdef CONFIG_SYSLOGD
Erik Andersen4f3f7572000-04-28 00:18:56 +000047# include <sys/syslog.h>
48#endif
49
Eric Andersen0298be82002-03-05 15:12:19 +000050#if defined(__UCLIBC__) && !defined(__UCLIBC_HAS_MMU__)
51#define fork vfork
52#endif
Pavel Roskin9c5fcc32000-07-17 23:45:12 +000053
Eric Andersenbd22ed82000-07-08 18:55:24 +000054/* From <linux/vt.h> */
55struct vt_stat {
56 unsigned short v_active; /* active vt */
57 unsigned short v_signal; /* signal to send */
58 unsigned short v_state; /* vt bitmask */
59};
Mark Whitley59ab0252001-01-23 22:30:04 +000060static const int VT_GETSTATE = 0x5603; /* get global vt state info */
Eric Andersenbd22ed82000-07-08 18:55:24 +000061
62/* From <linux/serial.h> */
63struct serial_struct {
64 int type;
65 int line;
66 int port;
67 int irq;
68 int flags;
69 int xmit_fifo_size;
70 int custom_divisor;
71 int baud_base;
72 unsigned short close_delay;
73 char reserved_char[2];
74 int hub6;
75 unsigned short closing_wait; /* time to wait before closing */
76 unsigned short closing_wait2; /* no longer used... */
77 int reserved[4];
78};
79
80
Eric Andersen72f9a422001-10-28 05:12:20 +000081#if (__GNU_LIBRARY__ > 5) || defined(__dietlibc__)
82 #include <sys/reboot.h>
83 #define init_reboot(magic) reboot(magic)
84#else
85 #define init_reboot(magic) reboot(0xfee1dead, 672274793, magic)
86#endif
Erik Andersen4f3f7572000-04-28 00:18:56 +000087
Eric Andersen41492d62001-02-23 00:05:56 +000088#ifndef _PATH_STDPATH
Erik Andersen4f3f7572000-04-28 00:18:56 +000089#define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
Eric Andersen41492d62001-02-23 00:05:56 +000090#endif
Eric Andersencc8ed391999-10-05 16:24:54 +000091
Eric Andersenbdfd0d72001-10-24 05:00:29 +000092#if defined CONFIG_FEATURE_INIT_COREDUMPS
Erik Andersen983b51b2000-04-04 18:14:25 +000093/*
Erik Andersen183da4a2000-04-04 18:36:37 +000094 * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called
95 * before processes are spawned to set core file size as unlimited.
96 * This is for debugging only. Don't use this is production, unless
97 * you want core dumps lying about....
Erik Andersen983b51b2000-04-04 18:14:25 +000098 */
99#define CORE_ENABLE_FLAG_FILE "/.init_enable_core"
100#include <sys/resource.h>
101#include <sys/time.h>
Erik Andersen183da4a2000-04-04 18:36:37 +0000102#endif
Erik Andersen983b51b2000-04-04 18:14:25 +0000103
Erik Andersen4d1d0111999-12-17 18:44:15 +0000104#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
Erik Andersen4d1d0111999-12-17 18:44:15 +0000105
Eric Andersenb6b519b2001-04-09 23:52:18 +0000106#if __GNU_LIBRARY__ > 5
107 #include <sys/kdaemon.h>
Erik Andersen4f3f7572000-04-28 00:18:56 +0000108#else
Eric Andersenb6b519b2001-04-09 23:52:18 +0000109 extern int bdflush (int func, long int data);
110#endif
Erik Andersen4f3f7572000-04-28 00:18:56 +0000111
Matt Kraai7bd773c2001-06-12 20:55:02 +0000112#define SHELL "/bin/sh" /* Default shell */
113#define LOGIN_SHELL "-" SHELL /* Default login shell */
Erik Andersen42094cd2000-03-20 21:34:52 +0000114#define INITTAB "/etc/inittab" /* inittab file location */
Erik Andersen96e2abd2000-01-07 11:40:44 +0000115#ifndef INIT_SCRIPT
Erik Andersen42094cd2000-03-20 21:34:52 +0000116#define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */
Erik Andersen96e2abd2000-01-07 11:40:44 +0000117#endif
Erik Andersen9c88cac1999-12-30 09:25:17 +0000118
Eric Andersen41492d62001-02-23 00:05:56 +0000119#define MAXENV 16 /* Number of env. vars */
Erik Andersen7dc16072000-01-04 01:10:25 +0000120
121/* Allowed init action types */
Eric Andersen0298be82002-03-05 15:12:19 +0000122#define SYSINIT 0x001
123#define RESPAWN 0x002
124#define ASKFIRST 0x004
125#define WAIT 0x008
126#define ONCE 0x010
127#define CTRLALTDEL 0x020
128#define SHUTDOWN 0x040
129#define RESTART 0x080
Erik Andersen7dc16072000-01-04 01:10:25 +0000130
Erik Andersen42094cd2000-03-20 21:34:52 +0000131/* A mapping between "inittab" action name strings and action type codes. */
Eric Andersen0298be82002-03-05 15:12:19 +0000132struct init_action_type {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000133 const char *name;
Eric Andersen0298be82002-03-05 15:12:19 +0000134 int action;
135};
Erik Andersen7dc16072000-01-04 01:10:25 +0000136
Eric Andersen0298be82002-03-05 15:12:19 +0000137static const struct init_action_type actions[] = {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000138 {"sysinit", SYSINIT},
139 {"respawn", RESPAWN},
140 {"askfirst", ASKFIRST},
141 {"wait", WAIT},
142 {"once", ONCE},
Erik Andersene132f4b2000-02-09 04:16:43 +0000143 {"ctrlaltdel", CTRLALTDEL},
Eric Andersenc97ec342001-04-03 18:01:51 +0000144 {"shutdown", SHUTDOWN},
Eric Andersen730f8262001-12-17 23:13:08 +0000145 {"restart", RESTART},
Pavel Roskin9027bcf2000-07-14 15:44:25 +0000146 {0, 0}
Erik Andersen7dc16072000-01-04 01:10:25 +0000147};
148
Eric Andersen0298be82002-03-05 15:12:19 +0000149/* Set up a linked list of init_actions, to be read from inittab */
150struct init_action {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000151 pid_t pid;
Eric Andersen0298be82002-03-05 15:12:19 +0000152 char command[256];
153 char terminal[256];
154 struct init_action *next;
155 int action;
Erik Andersen7dc16072000-01-04 01:10:25 +0000156};
Erik Andersen7dc16072000-01-04 01:10:25 +0000157
Eric Andersen0298be82002-03-05 15:12:19 +0000158/* Static variables */
159static struct init_action *init_action_list = NULL;
Matt Kraai439e3df2001-07-23 14:52:08 +0000160static char *secondConsole = VC_2;
161static char *thirdConsole = VC_3;
162static char *fourthConsole = VC_4;
163static char *log = VC_5;
Erik Andersen42094cd2000-03-20 21:34:52 +0000164static int kernelVersion = 0;
165static char termType[32] = "TERM=linux";
166static char console[32] = _PATH_CONSOLE;
Eric Andersen0298be82002-03-05 15:12:19 +0000167static sig_atomic_t got_cont = 0;
168static const int LOG = 0x1;
169static const int CONSOLE = 0x2;
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000170#if defined CONFIG_FEATURE_EXTRA_QUIET
Eric Andersen0298be82002-03-05 15:12:19 +0000171static const int MAYBE_CONSOLE = 0x0;
172#else
173#define MAYBE_CONSOLE CONSOLE
174#endif
175#ifndef RB_HALT_SYSTEM
176static const int RB_HALT_SYSTEM = 0xcdef0123;
177static const int RB_ENABLE_CAD = 0x89abcdef;
178static const int RB_DISABLE_CAD = 0;
179#define RB_POWER_OFF 0x4321fedc
180static const int RB_AUTOBOOT = 0x01234567;
181#endif
Erik Andersen42094cd2000-03-20 21:34:52 +0000182
Eric Andersen0298be82002-03-05 15:12:19 +0000183/* Function prototypes */
184static void delete_init_action(struct init_action *a);
185static int waitfor(struct init_action *a);
186
Eric Andersen0460ff21999-10-25 23:32:44 +0000187
Eric Andersen74400cc2001-10-18 04:11:39 +0000188static void loop_forever(void)
Matt Kraai67a46402001-06-03 05:55:52 +0000189{
190 while (1)
191 sleep (1);
192}
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000193
Erik Andersen42094cd2000-03-20 21:34:52 +0000194/* Print a message to the specified device.
195 * Device may be bitwise-or'd from LOG | CONSOLE */
Eric Andersenfedce062001-11-17 07:27:14 +0000196#ifdef DEBUG_INIT
197static inline messageND(int device, char *fmt, ...) { }
198#else
199#define messageND message
200#endif
Eric Andersen0298be82002-03-05 15:12:19 +0000201static void message(int device, char *fmt, ...) __attribute__ ((format (printf, 2, 3)));
Erik Andersen93d65132000-04-06 08:06:36 +0000202static void message(int device, char *fmt, ...)
Eric Andersen0460ff21999-10-25 23:32:44 +0000203{
Erik Andersene49d5ec2000-02-08 19:58:47 +0000204 va_list arguments;
205 int fd;
Erik Andersen7dc16072000-01-04 01:10:25 +0000206
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000207#ifdef CONFIG_SYSLOGD
Eric Andersen4c781471999-11-26 08:12:56 +0000208
Erik Andersene49d5ec2000-02-08 19:58:47 +0000209 /* Log the message to syslogd */
210 if (device & LOG) {
211 char msg[1024];
Eric Andersen4c781471999-11-26 08:12:56 +0000212
Erik Andersene49d5ec2000-02-08 19:58:47 +0000213 va_start(arguments, fmt);
214 vsnprintf(msg, sizeof(msg), fmt, arguments);
215 va_end(arguments);
Eric Andersen0298be82002-03-05 15:12:19 +0000216 syslog_msg(LOG_USER, LOG_INFO, msg);
Eric Andersen3ae0c781999-11-04 01:13:21 +0000217 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000218#else
219 static int log_fd = -1;
220
221 /* Take full control of the log tty, and never close it.
222 * It's mine, all mine! Muhahahaha! */
223 if (log_fd < 0) {
224 if (log == NULL) {
225 /* don't even try to log, because there is no such console */
226 log_fd = -2;
227 /* log to main console instead */
228 device = CONSOLE;
Erik Andersene132f4b2000-02-09 04:16:43 +0000229 } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) {
230 log_fd = -2;
Eric Andersen72f9a422001-10-28 05:12:20 +0000231 fprintf(stderr, "Bummer, can't write to log on %s!\n", log);
Erik Andersene132f4b2000-02-09 04:16:43 +0000232 log = NULL;
233 device = CONSOLE;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000234 }
235 }
236 if ((device & LOG) && (log_fd >= 0)) {
237 va_start(arguments, fmt);
238 vdprintf(log_fd, fmt, arguments);
239 va_end(arguments);
240 }
Eric Andersen4c781471999-11-26 08:12:56 +0000241#endif
242
Erik Andersene49d5ec2000-02-08 19:58:47 +0000243 if (device & CONSOLE) {
244 /* Always send console messages to /dev/console so people will see them. */
245 if (
246 (fd =
Eric Andersen0298be82002-03-05 15:12:19 +0000247 device_open(_PATH_CONSOLE, O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000248 va_start(arguments, fmt);
249 vdprintf(fd, fmt, arguments);
250 va_end(arguments);
251 close(fd);
252 } else {
253 fprintf(stderr, "Bummer, can't print: ");
254 va_start(arguments, fmt);
255 vfprintf(stderr, fmt, arguments);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000256 va_end(arguments);
257 }
Eric Andersen3ae0c781999-11-04 01:13:21 +0000258 }
Eric Andersencc8ed391999-10-05 16:24:54 +0000259}
260
Eric Andersen0460ff21999-10-25 23:32:44 +0000261/* Set terminal settings to reasonable defaults */
Eric Andersen3e6ff902001-03-09 21:24:12 +0000262static void set_term(int fd)
Eric Andersencc8ed391999-10-05 16:24:54 +0000263{
Erik Andersene49d5ec2000-02-08 19:58:47 +0000264 struct termios tty;
Eric Andersencc8ed391999-10-05 16:24:54 +0000265
Erik Andersene49d5ec2000-02-08 19:58:47 +0000266 tcgetattr(fd, &tty);
Eric Andersencc8ed391999-10-05 16:24:54 +0000267
Erik Andersene49d5ec2000-02-08 19:58:47 +0000268 /* set control chars */
Eric Andersen3849f9b2000-07-10 19:56:47 +0000269 tty.c_cc[VINTR] = 3; /* C-c */
270 tty.c_cc[VQUIT] = 28; /* C-\ */
271 tty.c_cc[VERASE] = 127; /* C-? */
272 tty.c_cc[VKILL] = 21; /* C-u */
273 tty.c_cc[VEOF] = 4; /* C-d */
274 tty.c_cc[VSTART] = 17; /* C-q */
275 tty.c_cc[VSTOP] = 19; /* C-s */
276 tty.c_cc[VSUSP] = 26; /* C-z */
Eric Andersen02bc25b2000-07-06 21:29:32 +0000277
Erik Andersene49d5ec2000-02-08 19:58:47 +0000278 /* use line dicipline 0 */
279 tty.c_line = 0;
Eric Andersen7f1acfd1999-10-29 23:09:13 +0000280
Erik Andersene49d5ec2000-02-08 19:58:47 +0000281 /* Make it be sane */
Erik Andersen6c41c442000-03-19 05:13:49 +0000282 tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
Eric Andersend8862922001-04-23 15:14:11 +0000283 tty.c_cflag |= CREAD|HUPCL|CLOCAL;
284
Eric Andersen08b10341999-11-19 02:38:58 +0000285
Erik Andersene49d5ec2000-02-08 19:58:47 +0000286 /* input modes */
287 tty.c_iflag = ICRNL | IXON | IXOFF;
Eric Andersen08b10341999-11-19 02:38:58 +0000288
Erik Andersene49d5ec2000-02-08 19:58:47 +0000289 /* output modes */
290 tty.c_oflag = OPOST | ONLCR;
Eric Andersen7f1acfd1999-10-29 23:09:13 +0000291
Erik Andersene49d5ec2000-02-08 19:58:47 +0000292 /* local modes */
293 tty.c_lflag =
294 ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN;
Eric Andersencc8ed391999-10-05 16:24:54 +0000295
Erik Andersene49d5ec2000-02-08 19:58:47 +0000296 tcsetattr(fd, TCSANOW, &tty);
Eric Andersencc8ed391999-10-05 16:24:54 +0000297}
298
Eric Andersenbc5941a2000-12-06 23:17:37 +0000299/* How much memory does this machine have?
300 Units are kBytes to avoid overflow on 4GB machines */
Eric Andersen74400cc2001-10-18 04:11:39 +0000301static int check_free_memory(void)
Eric Andersencc8ed391999-10-05 16:24:54 +0000302{
Erik Andersend07ee462000-02-21 21:26:32 +0000303 struct sysinfo info;
Eric Andersenbc5941a2000-12-06 23:17:37 +0000304 unsigned int result, u, s=10;
Eric Andersencc8ed391999-10-05 16:24:54 +0000305
Erik Andersend07ee462000-02-21 21:26:32 +0000306 if (sysinfo(&info) != 0) {
Eric Andersen53cfb7e2001-01-31 17:29:47 +0000307 perror_msg("Error checking free memory");
Erik Andersene49d5ec2000-02-08 19:58:47 +0000308 return -1;
Eric Andersenabc7d591999-10-19 00:27:50 +0000309 }
Eric Andersenbc5941a2000-12-06 23:17:37 +0000310
311 /* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes.
312 * Kernels 2.4.0 return info.mem_unit in bytes. */
313 u = info.mem_unit;
314 if (u==0) u=1;
315 while ( (u&1) == 0 && s > 0 ) { u>>=1; s--; }
316 result = (info.totalram>>s) + (info.totalswap>>s);
317 result = result*u;
318 if (result < 0) result = INT_MAX;
319 return result;
Eric Andersencc8ed391999-10-05 16:24:54 +0000320}
321
Eric Andersen74400cc2001-10-18 04:11:39 +0000322static void console_init(void)
Eric Andersen0460ff21999-10-25 23:32:44 +0000323{
Erik Andersene49d5ec2000-02-08 19:58:47 +0000324 int fd;
325 int tried_devcons = 0;
326 int tried_vtprimary = 0;
Erik Andersen029011b2000-03-04 21:19:32 +0000327 struct vt_stat vt;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000328 struct serial_struct sr;
329 char *s;
Eric Andersen0460ff21999-10-25 23:32:44 +0000330
Erik Andersene49d5ec2000-02-08 19:58:47 +0000331 if ((s = getenv("TERM")) != NULL) {
332 snprintf(termType, sizeof(termType) - 1, "TERM=%s", s);
333 }
Erik Andersenac6e71f2000-01-08 22:04:33 +0000334
Erik Andersene49d5ec2000-02-08 19:58:47 +0000335 if ((s = getenv("CONSOLE")) != NULL) {
Matt Kraai18447702001-05-18 21:24:58 +0000336 safe_strncpy(console, s, sizeof(console));
Erik Andersene49d5ec2000-02-08 19:58:47 +0000337 }
Eric Andersenfbb39c81999-11-08 17:00:52 +0000338#if #cpu(sparc)
Erik Andersene49d5ec2000-02-08 19:58:47 +0000339 /* sparc kernel supports console=tty[ab] parameter which is also
340 * passed to init, so catch it here */
341 else if ((s = getenv("console")) != NULL) {
342 /* remap tty[ab] to /dev/ttyS[01] */
343 if (strcmp(s, "ttya") == 0)
Matt Kraai439e3df2001-07-23 14:52:08 +0000344 safe_strncpy(console, SC_0, sizeof(console));
Erik Andersene49d5ec2000-02-08 19:58:47 +0000345 else if (strcmp(s, "ttyb") == 0)
Matt Kraai439e3df2001-07-23 14:52:08 +0000346 safe_strncpy(console, SC_1, sizeof(console));
Erik Andersene49d5ec2000-02-08 19:58:47 +0000347 }
Eric Andersen219d6f51999-11-02 19:43:01 +0000348#endif
Erik Andersene49d5ec2000-02-08 19:58:47 +0000349 else {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000350 /* 2.2 kernels: identify the real console backend and try to use it */
351 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
352 /* this is a serial console */
Matt Kraai439e3df2001-07-23 14:52:08 +0000353 snprintf(console, sizeof(console) - 1, SC_FORMAT, sr.line);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000354 } else if (ioctl(0, VT_GETSTATE, &vt) == 0) {
355 /* this is linux virtual tty */
Matt Kraai439e3df2001-07-23 14:52:08 +0000356 snprintf(console, sizeof(console) - 1, VC_FORMAT, vt.v_active);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000357 } else {
Matt Kraai18447702001-05-18 21:24:58 +0000358 safe_strncpy(console, _PATH_CONSOLE, sizeof(console));
Erik Andersene49d5ec2000-02-08 19:58:47 +0000359 tried_devcons++;
360 }
Eric Andersen07e52971999-11-07 07:38:08 +0000361 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000362
363 while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
364 /* Can't open selected console -- try /dev/console */
365 if (!tried_devcons) {
366 tried_devcons++;
Matt Kraai18447702001-05-18 21:24:58 +0000367 safe_strncpy(console, _PATH_CONSOLE, sizeof(console));
Erik Andersene49d5ec2000-02-08 19:58:47 +0000368 continue;
369 }
370 /* Can't open selected console -- try vt1 */
371 if (!tried_vtprimary) {
372 tried_vtprimary++;
Matt Kraai439e3df2001-07-23 14:52:08 +0000373 safe_strncpy(console, VC_1, sizeof(console));
Erik Andersene49d5ec2000-02-08 19:58:47 +0000374 continue;
375 }
376 break;
377 }
378 if (fd < 0) {
379 /* Perhaps we should panic here? */
Matt Kraai18447702001-05-18 21:24:58 +0000380 safe_strncpy(console, "/dev/null", sizeof(console));
Eric Andersen07e52971999-11-07 07:38:08 +0000381 } else {
Eric Andersen0298be82002-03-05 15:12:19 +0000382 /* check for serial console and disable logging to tty5 &
383 * running a shell to tty2-4 */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000384 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000385 log = NULL;
386 secondConsole = NULL;
Eric Andersen7e3bf6e2000-09-14 22:01:31 +0000387 thirdConsole = NULL;
388 fourthConsole = NULL;
Erik Andersenfa4718e2000-02-21 19:25:12 +0000389 /* Force the TERM setting to vt102 for serial console --
390 * iff TERM is set to linux (the default) */
391 if (strcmp( termType, "TERM=linux" ) == 0)
Matt Kraai18447702001-05-18 21:24:58 +0000392 safe_strncpy(termType, "TERM=vt102", sizeof(termType));
Erik Andersene132f4b2000-02-09 04:16:43 +0000393 message(LOG | CONSOLE,
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000394 "\rserial console detected. Disabling virtual terminals.\n");
Erik Andersene49d5ec2000-02-08 19:58:47 +0000395 }
396 close(fd);
Eric Andersen07e52971999-11-07 07:38:08 +0000397 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000398 message(LOG, "console=%s\n", console);
Eric Andersen0460ff21999-10-25 23:32:44 +0000399}
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000400
401static void fixup_argv(int argc, char **argv, char *new_argv0)
402{
403 int len;
404 /* Fix up argv[0] to be certain we claim to be init */
405 len = strlen(argv[0]);
406 memset(argv[0], 0, len);
Eric Andersen72f9a422001-10-28 05:12:20 +0000407 safe_strncpy(argv[0], new_argv0, len + 1);
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000408
409 /* Wipe argv[1]-argv[N] so they don't clutter the ps listing */
410 len = 1;
411 while (argc > len) {
412 memset(argv[len], 0, strlen(argv[len]));
413 len++;
414 }
415}
416
Eric Andersen0298be82002-03-05 15:12:19 +0000417/* Make sure there is enough memory to do something useful. *
418 * Calls "swapon -a" if needed so be sure /etc/fstab is present... */
419static void check_memory(void)
Eric Andersen0460ff21999-10-25 23:32:44 +0000420{
Eric Andersen0298be82002-03-05 15:12:19 +0000421 struct stat statBuf;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000422
Eric Andersen0298be82002-03-05 15:12:19 +0000423 if (check_free_memory() > 1000)
424 return;
425
426#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__)
427 if (stat("/etc/fstab", &statBuf) == 0) {
428 /* swapon -a requires /proc typically */
429 system("/bin/mount -t proc proc /proc");
430 /* Try to turn on swap */
431 system("/sbin/swapon -a");
432 if (check_free_memory() < 1000)
433 goto goodnight;
434 } else
435 goto goodnight;
436 return;
Eric Andersen38624232001-01-25 00:04:16 +0000437#endif
438
Eric Andersen0298be82002-03-05 15:12:19 +0000439 goodnight:
440 message(CONSOLE,
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000441 "\rSorry, your computer does not have enough memory.\n");
Eric Andersen0298be82002-03-05 15:12:19 +0000442 loop_forever();
443}
444
445static pid_t run(struct init_action *a)
446{
447 struct stat sb;
448 int i, j, fd, junk;
449 pid_t pid, pgrp, tmp_pid;
450 char *s, *tmpCmd, *cmd[255], *cmdpath, buf[255];
451 sigset_t nmask, omask;
Eric Andersen477aedd2001-02-20 18:01:50 +0000452 char *environment[MAXENV+1] = {
Eric Andersen7f197852001-03-16 01:14:04 +0000453 termType,
Erik Andersene49d5ec2000-02-08 19:58:47 +0000454 "HOME=/",
Eric Andersen72f9a422001-10-28 05:12:20 +0000455 "PATH=" _PATH_STDPATH,
Matt Kraai7bd773c2001-06-12 20:55:02 +0000456 "SHELL=" SHELL,
Eric Andersen7f197852001-03-16 01:14:04 +0000457 "USER=root",
458 NULL
Erik Andersene49d5ec2000-02-08 19:58:47 +0000459 };
Eric Andersen0298be82002-03-05 15:12:19 +0000460 static const char press_enter[] =
461#ifdef CUSTOMIZED_BANNER
462#include CUSTOMIZED_BANNER
463#endif
464 "\nPlease press Enter to activate this console. ";
Erik Andersenac6e71f2000-01-08 22:04:33 +0000465
Eric Andersen7f197852001-03-16 01:14:04 +0000466 /* inherit environment to the child, merging our values -andy */
467 for (i=0; environ[i]; i++) {
468 for (j=0; environment[j]; j++) {
469 s = strchr(environment[j], '=');
470 if (!strncmp(environ[i], environment[j], s - environment[j]))
471 break;
472 }
473 if (!environment[j]) {
474 environment[j++] = environ[i];
475 environment[j] = NULL;
476 }
Eric Andersen477aedd2001-02-20 18:01:50 +0000477 }
478
Eric Andersen0298be82002-03-05 15:12:19 +0000479 /* Block sigchild while forking. */
480 sigemptyset(&nmask);
481 sigaddset(&nmask, SIGCHLD);
482 sigprocmask(SIG_BLOCK, &nmask, &omask);
483
Eric Andersen72f9a422001-10-28 05:12:20 +0000484 if ((pid = fork()) == 0)
Eric Andersen72f9a422001-10-28 05:12:20 +0000485 {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000486 /* Clean up */
Eric Andersenfb6a5082000-09-13 16:15:29 +0000487 ioctl(0, TIOCNOTTY, 0);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000488 close(0);
489 close(1);
490 close(2);
Eric Andersen0298be82002-03-05 15:12:19 +0000491 sigprocmask(SIG_SETMASK, &omask, NULL);
492
493 /* Create a new session and make ourself the process group leader */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000494 setsid();
Eric Andersen0460ff21999-10-25 23:32:44 +0000495
Eric Andersen0298be82002-03-05 15:12:19 +0000496 /* Reset signal handlers that were set by the parent process */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000497 signal(SIGUSR1, SIG_DFL);
498 signal(SIGUSR2, SIG_DFL);
Eric Andersen0298be82002-03-05 15:12:19 +0000499 signal(SIGINT, SIG_DFL);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000500 signal(SIGTERM, SIG_DFL);
Eric Andersen0298be82002-03-05 15:12:19 +0000501 signal(SIGHUP, SIG_DFL);
Eric Andersened8a9be2001-11-30 19:10:58 +0000502 signal(SIGCONT, SIG_DFL);
503 signal(SIGSTOP, SIG_DFL);
504 signal(SIGTSTP, SIG_DFL);
Eric Andersen2f6c04f1999-11-01 23:59:44 +0000505
Eric Andersen0298be82002-03-05 15:12:19 +0000506 /* Open the new terminal device */
507 if ((fd = device_open(a->terminal, O_RDWR|O_NOCTTY)) < 0) {
508 if (stat(a->terminal, &sb) != 0) {
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000509 message(LOG | CONSOLE, "\rdevice '%s' does not exist.\n",
Eric Andersen0298be82002-03-05 15:12:19 +0000510 a->terminal);
511 _exit(1);
Eric Andersen53f50612001-03-14 09:01:11 +0000512 }
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000513 message(LOG | CONSOLE, "\rBummer, can't open %s\n", a->terminal);
Eric Andersen0298be82002-03-05 15:12:19 +0000514 _exit(1);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000515 }
Eric Andersen0298be82002-03-05 15:12:19 +0000516 /* Make sure the terminal will act fairly normal for us */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000517 set_term(0);
518
Eric Andersen0298be82002-03-05 15:12:19 +0000519 /* If the init Action requires up to wait, then force the
520 * supplied terminal to be the controlling tty. */
Eric Andersenc57e42b2002-03-29 00:59:44 +0000521 if (a->action & (SYSINIT|WAIT|CTRLALTDEL|SHUTDOWN|RESTART|ASKFIRST)) {
Eric Andersen0298be82002-03-05 15:12:19 +0000522
523 /* Take over the controlling tty */
524 ioctl(fd, TIOCSCTTY, 1);
525 /* Setup stdin, stdout, stderr for the new process so
526 * they point to the supplied terminal */
527 dup(fd);
528 dup(fd);
529
530 /* Now fork off another process to just hang around */
531 if ((pid = fork()) < 0) {
532 message(LOG | CONSOLE, "Can't fork!\n");
533 _exit(1);
534 }
535
536 if (pid > 0) {
537
538 /* We are the parent -- wait till the child is done */
539 signal(SIGINT, SIG_IGN);
540 signal(SIGTSTP, SIG_IGN);
541 signal(SIGQUIT, SIG_IGN);
542 signal(SIGCHLD, SIG_DFL);
543
544 /* Wait for child to exit */
545 while ((tmp_pid = waitpid(pid, &junk, 0)) != pid) {
546 if (tmp_pid < 0 && errno == ECHILD)
547 break;
548 }
549
550 /* See if stealing the controlling tty back is necessary */
551 pgrp = tcgetpgrp(tmp_pid);
552 if (pgrp != getpid())
553 _exit(0);
554
555 /* Use a temporary process to steal the controlling tty. */
556 if ((pid = fork()) < 0) {
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000557 message(LOG | CONSOLE, "\rCan't fork!\n");
Eric Andersen0298be82002-03-05 15:12:19 +0000558 _exit(1);
559 }
560 if (pid == 0) {
561 setsid();
562 ioctl(tmp_pid, TIOCSCTTY, 1);
563 _exit(0);
564 }
565 while((tmp_pid = waitpid(pid, &junk, 0)) != pid) {
566 if (tmp_pid < 0 && errno == ECHILD)
567 break;
568 }
569 _exit(0);
570 }
571
572 /* Now fall though to actually execute things */
573 } else {
574 dup(fd);
575 dup(fd);
576 }
577
Erik Andersene132f4b2000-02-09 04:16:43 +0000578 /* See if any special /bin/sh requiring characters are present */
Eric Andersen0298be82002-03-05 15:12:19 +0000579 if (strpbrk(a->command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
Erik Andersene132f4b2000-02-09 04:16:43 +0000580 cmd[0] = SHELL;
581 cmd[1] = "-c";
582 strcpy(buf, "exec ");
Eric Andersen0298be82002-03-05 15:12:19 +0000583 safe_strncpy(buf + sizeof("exec "), a->command,
Eric Andersen72f9a422001-10-28 05:12:20 +0000584 sizeof(buf) - sizeof("exec "));
Erik Andersene132f4b2000-02-09 04:16:43 +0000585 cmd[2] = buf;
586 cmd[3] = NULL;
587 } else {
588 /* Convert command (char*) into cmd (char**, one word per string) */
Eric Andersen0298be82002-03-05 15:12:19 +0000589 safe_strncpy(buf, a->command, sizeof(buf));
Eric Andersen72f9a422001-10-28 05:12:20 +0000590 s = buf;
591 for (tmpCmd = buf, i = 0;
592 (tmpCmd = strsep(&s, " \t")) != NULL;) {
Erik Andersene132f4b2000-02-09 04:16:43 +0000593 if (*tmpCmd != '\0') {
594 cmd[i] = tmpCmd;
595 tmpCmd++;
596 i++;
597 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000598 }
Erik Andersene132f4b2000-02-09 04:16:43 +0000599 cmd[i] = NULL;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000600 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000601
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000602 cmdpath = cmd[0];
Eric Andersen7e3bf6e2000-09-14 22:01:31 +0000603
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000604 /*
605 Interactive shells want to see a dash in argv[0]. This
606 typically is handled by login, argv will be setup this
607 way if a dash appears at the front of the command path
Eric Andersen7e3bf6e2000-09-14 22:01:31 +0000608 (like "-/bin/sh").
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000609 */
Eric Andersen7e3bf6e2000-09-14 22:01:31 +0000610
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000611 if (*cmdpath == '-') {
Eric Andersen7e3bf6e2000-09-14 22:01:31 +0000612
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000613 /* skip over the dash */
614 ++cmdpath;
Eric Andersen7e3bf6e2000-09-14 22:01:31 +0000615
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000616 /* find the last component in the command pathname */
617 s = get_last_path_component(cmdpath);
Eric Andersen7e3bf6e2000-09-14 22:01:31 +0000618
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000619 /* make a new argv[0] */
620 if ((cmd[0] = malloc(strlen(s)+2)) == NULL) {
621 message(LOG | CONSOLE, "malloc failed");
622 cmd[0] = cmdpath;
623 } else {
624 cmd[0][0] = '-';
625 strcpy(cmd[0]+1, s);
626 }
627 }
628
Eric Andersen0298be82002-03-05 15:12:19 +0000629 if (a->action & ASKFIRST) {
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000630 /*
631 * Save memory by not exec-ing anything large (like a shell)
632 * before the user wants it. This is critical if swap is not
633 * enabled and the system has low memory. Generally this will
634 * be run on the second virtual console, and the first will
635 * be allowed to start a shell or whatever an init script
636 * specifies.
637 */
Eric Andersen0298be82002-03-05 15:12:19 +0000638 messageND(LOG, "Waiting for enter to start '%s' (pid %d, terminal %s)\n",
639 cmdpath, getpid(), a->terminal);
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000640 write(fileno(stdout), press_enter, sizeof(press_enter) - 1);
641 getc(stdin);
642 }
643
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000644 /* Log the process name and args */
Eric Andersenfedce062001-11-17 07:27:14 +0000645 messageND(LOG, "Starting pid %d, console %s: '%s'\n",
Eric Andersen0298be82002-03-05 15:12:19 +0000646 getpid(), a->terminal, cmdpath);
Eric Andersen7e3bf6e2000-09-14 22:01:31 +0000647
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000648#if defined CONFIG_FEATURE_INIT_COREDUMPS
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000649 if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) {
650 struct rlimit limit;
651 limit.rlim_cur = RLIM_INFINITY;
652 limit.rlim_max = RLIM_INFINITY;
653 setrlimit(RLIMIT_CORE, &limit);
Erik Andersen983b51b2000-04-04 18:14:25 +0000654 }
Erik Andersen183da4a2000-04-04 18:36:37 +0000655#endif
Erik Andersen983b51b2000-04-04 18:14:25 +0000656
Erik Andersene49d5ec2000-02-08 19:58:47 +0000657 /* Now run it. The new program will take over this PID,
658 * so nothing further in init.c should be run. */
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000659 execve(cmdpath, cmd, environment);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000660
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000661 /* We're still here? Some error happened. */
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000662 message(LOG | CONSOLE, "\rBummer, could not run '%s': %s\n", cmdpath,
Eric Andersen7ef1a5b2001-03-20 17:39:08 +0000663 strerror(errno));
Eric Andersen0298be82002-03-05 15:12:19 +0000664 _exit(-1);
Erik Andersen05df2392000-01-13 04:43:48 +0000665 }
Eric Andersen0298be82002-03-05 15:12:19 +0000666 sigprocmask(SIG_SETMASK, &omask, NULL);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000667 return pid;
Eric Andersen0460ff21999-10-25 23:32:44 +0000668}
669
Eric Andersen0298be82002-03-05 15:12:19 +0000670static int waitfor(struct init_action *a)
Erik Andersen0e3782f2000-01-07 02:54:55 +0000671{
Eric Andersen0298be82002-03-05 15:12:19 +0000672 int pid;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000673 int status, wpid;
Erik Andersen0e3782f2000-01-07 02:54:55 +0000674
Eric Andersen0298be82002-03-05 15:12:19 +0000675 pid = run(a);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000676 while (1) {
677 wpid = wait(&status);
Erik Andersene132f4b2000-02-09 04:16:43 +0000678 if (wpid > 0 && wpid != pid) {
679 continue;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000680 }
681 if (wpid == pid)
682 break;
Erik Andersen0e3782f2000-01-07 02:54:55 +0000683 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000684 return wpid;
Erik Andersen0e3782f2000-01-07 02:54:55 +0000685}
686
Eric Andersen0298be82002-03-05 15:12:19 +0000687/* Run all commands of a particular type */
688static void run_actions(int action)
Eric Andersen219d6f51999-11-02 19:43:01 +0000689{
Eric Andersen0298be82002-03-05 15:12:19 +0000690 struct init_action *a, *tmp;
Eric Andersen219d6f51999-11-02 19:43:01 +0000691
Eric Andersen0298be82002-03-05 15:12:19 +0000692 for (a = init_action_list; a; a = tmp) {
693 tmp = a->next;
Eric Andersenc97ec342001-04-03 18:01:51 +0000694 if (a->action == action) {
Eric Andersen0298be82002-03-05 15:12:19 +0000695 if (a->action & (SYSINIT|WAIT|CTRLALTDEL|SHUTDOWN|RESTART)) {
696 waitfor(a);
697 delete_init_action(a);
698 } else if (a->action & ONCE) {
699 run(a);
700 delete_init_action(a);
701 } else if (a->action & (RESPAWN|ASKFIRST)) {
702 /* Only run stuff with pid==0. If they have
703 * a pid, that means it is still running */
704 if (a->pid == 0) {
705 a->pid = run(a);
706 }
707 }
Erik Andersene132f4b2000-02-09 04:16:43 +0000708 }
709 }
710}
711
712
Erik Andersen7dc16072000-01-04 01:10:25 +0000713#ifndef DEBUG_INIT
Eric Andersen8a8fbb81999-10-26 00:18:56 +0000714static void shutdown_system(void)
Eric Andersencc8ed391999-10-05 16:24:54 +0000715{
Eric Andersen813d88c2001-10-28 22:49:48 +0000716 sigset_t block_signals;
Erik Andersene132f4b2000-02-09 04:16:43 +0000717
Eric Andersen72f9a422001-10-28 05:12:20 +0000718 /* first disable all our signals */
719 sigemptyset(&block_signals);
720 sigaddset(&block_signals, SIGHUP);
721 sigaddset(&block_signals, SIGCHLD);
722 sigaddset(&block_signals, SIGUSR1);
723 sigaddset(&block_signals, SIGUSR2);
724 sigaddset(&block_signals, SIGINT);
725 sigaddset(&block_signals, SIGTERM);
Eric Andersened8a9be2001-11-30 19:10:58 +0000726 sigaddset(&block_signals, SIGCONT);
727 sigaddset(&block_signals, SIGSTOP);
728 sigaddset(&block_signals, SIGTSTP);
Eric Andersen72f9a422001-10-28 05:12:20 +0000729 sigprocmask(SIG_BLOCK, &block_signals, NULL);
Erik Andersen7dc16072000-01-04 01:10:25 +0000730
Erik Andersene49d5ec2000-02-08 19:58:47 +0000731 /* Allow Ctrl-Alt-Del to reboot system. */
Erik Andersen4f3f7572000-04-28 00:18:56 +0000732 init_reboot(RB_ENABLE_CAD);
Erik Andersene132f4b2000-02-09 04:16:43 +0000733
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000734 message(CONSOLE|LOG, "\n\rThe system is going down NOW !!\n");
Eric Andersencf8c9cf1999-11-05 00:31:46 +0000735 sync();
Erik Andersene49d5ec2000-02-08 19:58:47 +0000736
737 /* Send signals to every process _except_ pid 1 */
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000738 message(CONSOLE|LOG, "\rSending SIGTERM to all processes.\n");
Erik Andersene49d5ec2000-02-08 19:58:47 +0000739 kill(-1, SIGTERM);
Erik Andersene132f4b2000-02-09 04:16:43 +0000740 sleep(1);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000741 sync();
742
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000743 message(CONSOLE|LOG, "\rSending SIGKILL to all processes.\n");
Erik Andersene49d5ec2000-02-08 19:58:47 +0000744 kill(-1, SIGKILL);
Erik Andersene132f4b2000-02-09 04:16:43 +0000745 sleep(1);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000746
Matt Kraai8fc364e2001-04-12 20:12:16 +0000747 /* run everything to be run at "shutdown" */
Eric Andersenc97ec342001-04-03 18:01:51 +0000748 run_actions(SHUTDOWN);
Erik Andersene132f4b2000-02-09 04:16:43 +0000749
Erik Andersene49d5ec2000-02-08 19:58:47 +0000750 sync();
Eric Andersenbd22ed82000-07-08 18:55:24 +0000751 if (kernelVersion > 0 && kernelVersion <= KERNEL_VERSION(2,2,11)) {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000752 /* bdflush, kupdate not needed for kernels >2.2.11 */
753 bdflush(1, 0);
754 sync();
755 }
Eric Andersencc8ed391999-10-05 16:24:54 +0000756}
757
Eric Andersen730f8262001-12-17 23:13:08 +0000758static void exec_signal(int sig)
759{
Eric Andersen0298be82002-03-05 15:12:19 +0000760 struct init_action *a, *tmp;
761 for (a = init_action_list; a; a = tmp) {
762 tmp = a->next;
763 if (a->action & RESTART) {
Eric Andersen730f8262001-12-17 23:13:08 +0000764 shutdown_system();
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000765 message(CONSOLE|LOG, "\rTrying to re-exec %s\n", a->command);
Eric Andersen0298be82002-03-05 15:12:19 +0000766 execl(a->command, a->command, NULL);
Eric Andersen730f8262001-12-17 23:13:08 +0000767
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000768 message(CONSOLE|LOG, "\rexec of '%s' failed: %s\n",
Eric Andersen0298be82002-03-05 15:12:19 +0000769 a->command, sys_errlist[errno]);
Eric Andersen730f8262001-12-17 23:13:08 +0000770 sync();
771 sleep(2);
772 init_reboot(RB_HALT_SYSTEM);
773 loop_forever();
774 }
775 }
776}
777
Eric Andersen8a8fbb81999-10-26 00:18:56 +0000778static void halt_signal(int sig)
Eric Andersencc8ed391999-10-05 16:24:54 +0000779{
Erik Andersene49d5ec2000-02-08 19:58:47 +0000780 shutdown_system();
Erik Andersene132f4b2000-02-09 04:16:43 +0000781 message(CONSOLE|LOG,
Eric Andersenf435a912001-11-20 05:42:57 +0000782#if #cpu(s390)
783 /* Seems the s390 console is Wierd(tm). */
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000784 "\rThe system is halted. You may reboot now.\n"
Eric Andersenf435a912001-11-20 05:42:57 +0000785#else
786 /* secondConsole is NULL for a serial console */
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000787 "\rThe system is halted. Press %s or turn off power\n",
Eric Andersenf435a912001-11-20 05:42:57 +0000788 (secondConsole == NULL)? "Reset" : "CTRL-ALT-DEL"
789#endif
790 );
Erik Andersene49d5ec2000-02-08 19:58:47 +0000791 sync();
Erik Andersen3fe39dc2000-01-25 18:13:53 +0000792
Erik Andersene49d5ec2000-02-08 19:58:47 +0000793 /* allow time for last message to reach serial console */
Erik Andersene132f4b2000-02-09 04:16:43 +0000794 sleep(2);
Erik Andersen3fe39dc2000-01-25 18:13:53 +0000795
Eric Andersenbd22ed82000-07-08 18:55:24 +0000796 if (sig == SIGUSR2 && kernelVersion >= KERNEL_VERSION(2,2,0))
Erik Andersen4f3f7572000-04-28 00:18:56 +0000797 init_reboot(RB_POWER_OFF);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000798 else
Erik Andersen4f3f7572000-04-28 00:18:56 +0000799 init_reboot(RB_HALT_SYSTEM);
Matt Kraai67a46402001-06-03 05:55:52 +0000800
801 loop_forever();
Eric Andersencc8ed391999-10-05 16:24:54 +0000802}
803
Eric Andersen8a8fbb81999-10-26 00:18:56 +0000804static void reboot_signal(int sig)
Eric Andersencc8ed391999-10-05 16:24:54 +0000805{
Erik Andersene49d5ec2000-02-08 19:58:47 +0000806 shutdown_system();
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000807 message(CONSOLE|LOG, "\rPlease stand by while rebooting the system.\n");
Erik Andersene49d5ec2000-02-08 19:58:47 +0000808 sync();
Erik Andersen3fe39dc2000-01-25 18:13:53 +0000809
Erik Andersene49d5ec2000-02-08 19:58:47 +0000810 /* allow time for last message to reach serial console */
811 sleep(2);
Erik Andersen3fe39dc2000-01-25 18:13:53 +0000812
Erik Andersen4f3f7572000-04-28 00:18:56 +0000813 init_reboot(RB_AUTOBOOT);
Matt Kraai67a46402001-06-03 05:55:52 +0000814
815 loop_forever();
Eric Andersencc8ed391999-10-05 16:24:54 +0000816}
Eric Andersen8a8fbb81999-10-26 00:18:56 +0000817
Eric Andersenc97ec342001-04-03 18:01:51 +0000818static void ctrlaltdel_signal(int sig)
819{
820 run_actions(CTRLALTDEL);
821}
822
Eric Andersen0298be82002-03-05 15:12:19 +0000823/* The SIGSTOP & SIGTSTP handler */
Eric Andersened8a9be2001-11-30 19:10:58 +0000824static void stop_handler(int sig)
825{
Eric Andersen0298be82002-03-05 15:12:19 +0000826 int saved_errno = errno;
Eric Andersened8a9be2001-11-30 19:10:58 +0000827
828 got_cont = 0;
829 while(!got_cont) pause();
830 got_cont = 0;
831 errno = saved_errno;
832}
833
Eric Andersen0298be82002-03-05 15:12:19 +0000834/* The SIGCONT handler */
Eric Andersened8a9be2001-11-30 19:10:58 +0000835static void cont_handler(int sig)
836{
837 got_cont = 1;
838}
839
Erik Andersene49d5ec2000-02-08 19:58:47 +0000840#endif /* ! DEBUG_INIT */
Erik Andersende552872000-01-23 01:34:05 +0000841
Eric Andersen0298be82002-03-05 15:12:19 +0000842static void new_init_action(int action, char *command, char *cons)
Erik Andersen7dc16072000-01-04 01:10:25 +0000843{
Eric Andersen0298be82002-03-05 15:12:19 +0000844 struct init_action *new_action, *a;
Erik Andersen9e737252000-01-06 01:16:13 +0000845
Erik Andersene49d5ec2000-02-08 19:58:47 +0000846 if (*cons == '\0')
847 cons = console;
Erik Andersen9e737252000-01-06 01:16:13 +0000848
Eric Andersen0298be82002-03-05 15:12:19 +0000849 /* If BusyBox detects that a serial console is in use, then entries
850 * not refering to the console or null devices will _not_ be run.
Erik Andersene49d5ec2000-02-08 19:58:47 +0000851 * The exception to this rule is the null device.
852 */
853 if (secondConsole == NULL && strcmp(cons, console)
854 && strcmp(cons, "/dev/null"))
855 return;
Eric Andersen0298be82002-03-05 15:12:19 +0000856 if (strcmp(cons, "/dev/null") == 0 && (action & ASKFIRST))
Eric Andersen1644db92001-09-05 20:18:15 +0000857 return;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000858
Eric Andersen0298be82002-03-05 15:12:19 +0000859 new_action = calloc((size_t) (1), sizeof(struct init_action));
860 if (!new_action) {
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000861 message(LOG | CONSOLE, "\rMemory allocation failure\n");
Matt Kraai67a46402001-06-03 05:55:52 +0000862 loop_forever();
Erik Andersene49d5ec2000-02-08 19:58:47 +0000863 }
Eric Andersen0298be82002-03-05 15:12:19 +0000864
865 /* Append to the end of the list */
866 for (a = init_action_list; a && a->next; a = a->next) ;
Eric Andersen1644db92001-09-05 20:18:15 +0000867 if (a) {
Eric Andersen0298be82002-03-05 15:12:19 +0000868 a->next = new_action;
Eric Andersen1644db92001-09-05 20:18:15 +0000869 } else {
Eric Andersen0298be82002-03-05 15:12:19 +0000870 init_action_list = new_action;
Eric Andersen1644db92001-09-05 20:18:15 +0000871 }
Eric Andersen0298be82002-03-05 15:12:19 +0000872 safe_strncpy(new_action->command, command, 255);
873 new_action->action = action;
874 safe_strncpy(new_action->terminal, cons, 255);
875 new_action->pid = 0;
876// message(LOG|CONSOLE, "command='%s' action='%d' terminal='%s'\n",
877// new_action->command, new_action->action, new_action->terminal);
Erik Andersen7dc16072000-01-04 01:10:25 +0000878}
879
Eric Andersen0298be82002-03-05 15:12:19 +0000880static void delete_init_action(struct init_action * action)
Erik Andersen7dc16072000-01-04 01:10:25 +0000881{
Eric Andersen0298be82002-03-05 15:12:19 +0000882 struct init_action *a, *b = NULL;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000883
Eric Andersen0298be82002-03-05 15:12:19 +0000884 for (a = init_action_list; a; b = a, a = a->next) {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000885 if (a == action) {
886 if (b == NULL) {
Eric Andersen0298be82002-03-05 15:12:19 +0000887 init_action_list = a->next;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000888 } else {
Eric Andersen0298be82002-03-05 15:12:19 +0000889 b->next = a->next;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000890 }
891 free(a);
892 break;
893 }
Erik Andersen7dc16072000-01-04 01:10:25 +0000894 }
Erik Andersen7dc16072000-01-04 01:10:25 +0000895}
896
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000897/* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined,
Erik Andersen9e737252000-01-06 01:16:13 +0000898 * then parse_inittab() simply adds in some default
Eric Andersen77d92682001-05-23 20:32:09 +0000899 * actions(i.e., runs INIT_SCRIPT and then starts a pair
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000900 * of "askfirst" shells). If CONFIG_FEATURE_USE_INITTAB
Erik Andersen812d4662000-01-07 18:30:40 +0000901 * _is_ defined, but /etc/inittab is missing, this
902 * results in the same set of default behaviors.
Erik Andersen9e737252000-01-06 01:16:13 +0000903 * */
Eric Andersen3e6ff902001-03-09 21:24:12 +0000904static void parse_inittab(void)
Erik Andersen7dc16072000-01-04 01:10:25 +0000905{
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000906#ifdef CONFIG_FEATURE_USE_INITTAB
Erik Andersene49d5ec2000-02-08 19:58:47 +0000907 FILE *file;
908 char buf[256], lineAsRead[256], tmpConsole[256];
Eric Andersen0298be82002-03-05 15:12:19 +0000909 char *id, *runlev, *action, *command, *eol;
910 const struct init_action_type *a = actions;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000911 int foundIt;
Erik Andersen7dc16072000-01-04 01:10:25 +0000912
913
Erik Andersene49d5ec2000-02-08 19:58:47 +0000914 file = fopen(INITTAB, "r");
915 if (file == NULL) {
916 /* No inittab file -- set up some default behavior */
Erik Andersen9e737252000-01-06 01:16:13 +0000917#endif
Eric Andersenc97ec342001-04-03 18:01:51 +0000918 /* Reboot on Ctrl-Alt-Del */
Eric Andersen0298be82002-03-05 15:12:19 +0000919 new_init_action(CTRLALTDEL, "/sbin/reboot", console);
Eric Andersen1644db92001-09-05 20:18:15 +0000920 /* Umount all filesystems on halt/reboot */
Eric Andersen0298be82002-03-05 15:12:19 +0000921 new_init_action(SHUTDOWN, "/bin/umount -a -r", console);
Eric Andersen72f9a422001-10-28 05:12:20 +0000922#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__)
Eric Andersen1644db92001-09-05 20:18:15 +0000923 /* Swapoff on halt/reboot */
Eric Andersen0298be82002-03-05 15:12:19 +0000924 new_init_action(SHUTDOWN, "/sbin/swapoff -a", console);
Eric Andersen1644db92001-09-05 20:18:15 +0000925#endif
Eric Andersen730f8262001-12-17 23:13:08 +0000926 /* Prepare to restart init when a HUP is received */
Eric Andersen0298be82002-03-05 15:12:19 +0000927 new_init_action(RESTART, "/sbin/init", console);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000928 /* Askfirst shell on tty1 */
Eric Andersen0298be82002-03-05 15:12:19 +0000929 new_init_action(ASKFIRST, LOGIN_SHELL, console);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000930 /* Askfirst shell on tty2 */
931 if (secondConsole != NULL)
Eric Andersen0298be82002-03-05 15:12:19 +0000932 new_init_action(ASKFIRST, LOGIN_SHELL, secondConsole);
Eric Andersen7e3bf6e2000-09-14 22:01:31 +0000933 /* Askfirst shell on tty3 */
934 if (thirdConsole != NULL)
Eric Andersen0298be82002-03-05 15:12:19 +0000935 new_init_action(ASKFIRST, LOGIN_SHELL, thirdConsole);
Eric Andersen7e3bf6e2000-09-14 22:01:31 +0000936 /* Askfirst shell on tty4 */
937 if (fourthConsole != NULL)
Eric Andersen0298be82002-03-05 15:12:19 +0000938 new_init_action(ASKFIRST, LOGIN_SHELL, fourthConsole);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000939 /* sysinit */
Eric Andersen0298be82002-03-05 15:12:19 +0000940 new_init_action(SYSINIT, INIT_SCRIPT, console);
Erik Andersen7dc16072000-01-04 01:10:25 +0000941
Erik Andersene49d5ec2000-02-08 19:58:47 +0000942 return;
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000943#ifdef CONFIG_FEATURE_USE_INITTAB
Erik Andersen9e737252000-01-06 01:16:13 +0000944 }
Erik Andersen7dc16072000-01-04 01:10:25 +0000945
Erik Andersene49d5ec2000-02-08 19:58:47 +0000946 while (fgets(buf, 255, file) != NULL) {
947 foundIt = FALSE;
Eric Andersenb5966362000-05-31 20:04:38 +0000948 /* Skip leading spaces */
949 for (id = buf; *id == ' ' || *id == '\t'; id++);
950
951 /* Skip the line if it's a comment */
952 if (*id == '#' || *id == '\n')
Erik Andersene49d5ec2000-02-08 19:58:47 +0000953 continue;
Erik Andersen7dc16072000-01-04 01:10:25 +0000954
Erik Andersene49d5ec2000-02-08 19:58:47 +0000955 /* Trim the trailing \n */
Eric Andersenb5966362000-05-31 20:04:38 +0000956 eol = strrchr(id, '\n');
957 if (eol != NULL)
958 *eol = '\0';
Erik Andersen7dc16072000-01-04 01:10:25 +0000959
Erik Andersene49d5ec2000-02-08 19:58:47 +0000960 /* Keep a copy around for posterity's sake (and error msgs) */
961 strcpy(lineAsRead, buf);
962
Eric Andersenb5966362000-05-31 20:04:38 +0000963 /* Separate the ID field from the runlevels */
964 runlev = strchr(id, ':');
965 if (runlev == NULL || *(runlev + 1) == '\0') {
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000966 message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000967 continue;
968 } else {
Eric Andersenb5966362000-05-31 20:04:38 +0000969 *runlev = '\0';
970 ++runlev;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000971 }
972
Eric Andersenb5966362000-05-31 20:04:38 +0000973 /* Separate the runlevels from the action */
974 action = strchr(runlev, ':');
975 if (action == NULL || *(action + 1) == '\0') {
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000976 message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000977 continue;
978 } else {
Eric Andersenb5966362000-05-31 20:04:38 +0000979 *action = '\0';
980 ++action;
981 }
982
Eric Andersen0298be82002-03-05 15:12:19 +0000983 /* Separate the action from the command */
984 command = strchr(action, ':');
985 if (command == NULL || *(command + 1) == '\0') {
Eric Andersenb0cc0a62002-03-20 14:57:50 +0000986 message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead);
Eric Andersenb5966362000-05-31 20:04:38 +0000987 continue;
988 } else {
Eric Andersen0298be82002-03-05 15:12:19 +0000989 *command = '\0';
990 ++command;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000991 }
992
993 /* Ok, now process it */
994 a = actions;
995 while (a->name != 0) {
Eric Andersenb5966362000-05-31 20:04:38 +0000996 if (strcmp(a->name, action) == 0) {
997 if (*id != '\0') {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000998 strcpy(tmpConsole, "/dev/");
Eric Andersenb5966362000-05-31 20:04:38 +0000999 strncat(tmpConsole, id, 200);
Eric Andersenb5966362000-05-31 20:04:38 +00001000 id = tmpConsole;
Erik Andersene49d5ec2000-02-08 19:58:47 +00001001 }
Eric Andersen0298be82002-03-05 15:12:19 +00001002 new_init_action(a->action, command, id);
Erik Andersene49d5ec2000-02-08 19:58:47 +00001003 foundIt = TRUE;
1004 }
1005 a++;
1006 }
Eric Andersen0298be82002-03-05 15:12:19 +00001007 if (foundIt == TRUE)
Erik Andersene49d5ec2000-02-08 19:58:47 +00001008 continue;
1009 else {
1010 /* Choke on an unknown action */
Eric Andersenb0cc0a62002-03-20 14:57:50 +00001011 message(LOG | CONSOLE, "\rBad inittab entry: %s\n", lineAsRead);
Erik Andersene49d5ec2000-02-08 19:58:47 +00001012 }
Erik Andersen7dc16072000-01-04 01:10:25 +00001013 }
Erik Andersene49d5ec2000-02-08 19:58:47 +00001014 return;
Eric Andersenbdfd0d72001-10-24 05:00:29 +00001015#endif /* CONFIG_FEATURE_USE_INITTAB */
Erik Andersen7dc16072000-01-04 01:10:25 +00001016}
1017
Erik Andersene132f4b2000-02-09 04:16:43 +00001018
1019
Eric Andersen8a8fbb81999-10-26 00:18:56 +00001020extern int init_main(int argc, char **argv)
Eric Andersen0460ff21999-10-25 23:32:44 +00001021{
Eric Andersen0298be82002-03-05 15:12:19 +00001022 struct init_action *a;
Erik Andersene49d5ec2000-02-08 19:58:47 +00001023 pid_t wpid;
1024 int status;
Eric Andersen0460ff21999-10-25 23:32:44 +00001025
Eric Andersen730f8262001-12-17 23:13:08 +00001026 if (argc > 1 && !strcmp(argv[1], "-q")) {
Eric Andersen467a18b2002-01-25 23:13:06 +00001027 /* don't assume init's pid == 1 */
1028 long *pid = find_pid_by_name("init");
1029 if (!pid || *pid<=0) {
1030 pid = find_pid_by_name("linuxrc");
1031 if (!pid || *pid<=0)
1032 error_msg_and_die("no process killed");
1033 }
1034 kill(*pid, SIGHUP);
Eric Andersen730f8262001-12-17 23:13:08 +00001035 exit(0);
1036 }
1037
Eric Andersend73dc5b1999-11-10 23:13:02 +00001038#ifndef DEBUG_INIT
Erik Andersena51ecdd2000-02-24 18:09:58 +00001039 /* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
1040 if (getpid() != 1
Eric Andersenbdfd0d72001-10-24 05:00:29 +00001041#ifdef CONFIG_FEATURE_INITRD
Matt Kraaie58771e2000-07-12 15:38:49 +00001042 && strstr(applet_name, "linuxrc") == NULL
Erik Andersena51ecdd2000-02-24 18:09:58 +00001043#endif
1044 )
1045 {
Eric Andersen67991cf2001-02-14 21:23:06 +00001046 show_usage();
Erik Andersene49d5ec2000-02-08 19:58:47 +00001047 }
Erik Andersene49d5ec2000-02-08 19:58:47 +00001048 /* Set up sig handlers -- be sure to
1049 * clear all of these in run() */
Eric Andersen0298be82002-03-05 15:12:19 +00001050 signal(SIGHUP, exec_signal);
Erik Andersene49d5ec2000-02-08 19:58:47 +00001051 signal(SIGUSR1, halt_signal);
Eric Andersen4c95a282000-07-07 19:30:28 +00001052 signal(SIGUSR2, halt_signal);
Eric Andersen0298be82002-03-05 15:12:19 +00001053 signal(SIGINT, ctrlaltdel_signal);
Erik Andersene49d5ec2000-02-08 19:58:47 +00001054 signal(SIGTERM, reboot_signal);
Eric Andersened8a9be2001-11-30 19:10:58 +00001055 signal(SIGCONT, cont_handler);
1056 signal(SIGSTOP, stop_handler);
1057 signal(SIGTSTP, stop_handler);
Eric Andersen0460ff21999-10-25 23:32:44 +00001058
Erik Andersene49d5ec2000-02-08 19:58:47 +00001059 /* Turn off rebooting via CTL-ALT-DEL -- we get a
1060 * SIGINT on CAD so we can shut things down gracefully... */
Erik Andersen4f3f7572000-04-28 00:18:56 +00001061 init_reboot(RB_DISABLE_CAD);
Erik Andersene49d5ec2000-02-08 19:58:47 +00001062#endif
Erik Andersen05df2392000-01-13 04:43:48 +00001063
Erik Andersen298854f2000-03-23 01:09:18 +00001064 /* Figure out what kernel this is running */
1065 kernelVersion = get_kernel_revision();
1066
Erik Andersene49d5ec2000-02-08 19:58:47 +00001067 /* Close whatever files are open, and reset the console. */
1068 close(0);
1069 close(1);
1070 close(2);
Eric Andersen72f9a422001-10-28 05:12:20 +00001071
1072 /* Figure out where the default console should be */
1073 console_init();
1074
Erik Andersene49d5ec2000-02-08 19:58:47 +00001075 set_term(0);
Erik Andersen983b51b2000-04-04 18:14:25 +00001076 chdir("/");
Erik Andersene49d5ec2000-02-08 19:58:47 +00001077 setsid();
Eric Andersencc8ed391999-10-05 16:24:54 +00001078
Erik Andersene49d5ec2000-02-08 19:58:47 +00001079 /* Make sure PATH is set to something sane */
Eric Andersen452fd332001-03-04 06:47:33 +00001080 putenv("PATH="_PATH_STDPATH);
Eric Andersencc8ed391999-10-05 16:24:54 +00001081
Erik Andersene49d5ec2000-02-08 19:58:47 +00001082 /* Hello world */
Eric Andersenb0cc0a62002-03-20 14:57:50 +00001083 message(MAYBE_CONSOLE|LOG, "\rinit started: %s\n", full_version);
Eric Andersencc8ed391999-10-05 16:24:54 +00001084
Erik Andersene49d5ec2000-02-08 19:58:47 +00001085 /* Make sure there is enough memory to do something useful. */
1086 check_memory();
Erik Andersen9e737252000-01-06 01:16:13 +00001087
Erik Andersene49d5ec2000-02-08 19:58:47 +00001088 /* Check if we are supposed to be in single user mode */
1089 if (argc > 1 && (!strcmp(argv[1], "single") ||
1090 !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
Eric Andersen7e3bf6e2000-09-14 22:01:31 +00001091 /* Ask first then start a shell on tty2-4 */
Erik Andersene49d5ec2000-02-08 19:58:47 +00001092 if (secondConsole != NULL)
Eric Andersen0298be82002-03-05 15:12:19 +00001093 new_init_action(ASKFIRST, LOGIN_SHELL, secondConsole);
Eric Andersen7e3bf6e2000-09-14 22:01:31 +00001094 if (thirdConsole != NULL)
Eric Andersen0298be82002-03-05 15:12:19 +00001095 new_init_action(ASKFIRST, LOGIN_SHELL, thirdConsole);
Eric Andersen7e3bf6e2000-09-14 22:01:31 +00001096 if (fourthConsole != NULL)
Eric Andersen0298be82002-03-05 15:12:19 +00001097 new_init_action(ASKFIRST, LOGIN_SHELL, fourthConsole);
Erik Andersene49d5ec2000-02-08 19:58:47 +00001098 /* Start a shell on tty1 */
Eric Andersen0298be82002-03-05 15:12:19 +00001099 new_init_action(RESPAWN, LOGIN_SHELL, console);
Erik Andersene49d5ec2000-02-08 19:58:47 +00001100 } else {
1101 /* Not in single user mode -- see what inittab says */
Eric Andersen8a8fbb81999-10-26 00:18:56 +00001102
Eric Andersenbdfd0d72001-10-24 05:00:29 +00001103 /* NOTE that if CONFIG_FEATURE_USE_INITTAB is NOT defined,
Erik Andersene49d5ec2000-02-08 19:58:47 +00001104 * then parse_inittab() simply adds in some default
Eric Andersen77d92682001-05-23 20:32:09 +00001105 * actions(i.e., runs INIT_SCRIPT and then starts a pair
Erik Andersene49d5ec2000-02-08 19:58:47 +00001106 * of "askfirst" shells */
1107 parse_inittab();
Eric Andersend00c2621999-12-07 08:37:31 +00001108 }
Erik Andersen983b51b2000-04-04 18:14:25 +00001109
Eric Andersen7ef1a5b2001-03-20 17:39:08 +00001110 /* Make the command line just say "init" -- thats all, nothing else */
1111 fixup_argv(argc, argv, "init");
Eric Andersen219d6f51999-11-02 19:43:01 +00001112
Erik Andersene49d5ec2000-02-08 19:58:47 +00001113 /* Now run everything that needs to be run */
1114
1115 /* First run the sysinit command */
Eric Andersen1644db92001-09-05 20:18:15 +00001116 run_actions(SYSINIT);
Eric Andersen0298be82002-03-05 15:12:19 +00001117
Erik Andersene49d5ec2000-02-08 19:58:47 +00001118 /* Next run anything that wants to block */
Eric Andersen1644db92001-09-05 20:18:15 +00001119 run_actions(WAIT);
Eric Andersen0298be82002-03-05 15:12:19 +00001120
Erik Andersene49d5ec2000-02-08 19:58:47 +00001121 /* Next run anything to be run only once */
Eric Andersen0298be82002-03-05 15:12:19 +00001122 run_actions(ONCE);
1123
Erik Andersene49d5ec2000-02-08 19:58:47 +00001124 /* If there is nothing else to do, stop */
Eric Andersen0298be82002-03-05 15:12:19 +00001125 if (init_action_list == NULL) {
Eric Andersenb0cc0a62002-03-20 14:57:50 +00001126 message(LOG | CONSOLE, "\rNo more tasks for init -- sleeping forever.\n");
Matt Kraai67a46402001-06-03 05:55:52 +00001127 loop_forever();
Erik Andersene49d5ec2000-02-08 19:58:47 +00001128 }
1129
1130 /* Now run the looping stuff for the rest of forever */
1131 while (1) {
Eric Andersen0298be82002-03-05 15:12:19 +00001132 /* run the respawn stuff */
1133 run_actions(RESPAWN);
1134
1135 /* run the askfirst stuff */
1136 run_actions(ASKFIRST);
1137
1138 /* Don't consume all CPU time -- sleep a bit */
1139 sleep(1);
1140
Erik Andersene49d5ec2000-02-08 19:58:47 +00001141 /* Wait for a child process to exit */
1142 wpid = wait(&status);
1143 if (wpid > 0) {
1144 /* Find out who died and clean up their corpse */
Eric Andersen0298be82002-03-05 15:12:19 +00001145 for (a = init_action_list; a; a = a->next) {
Erik Andersene49d5ec2000-02-08 19:58:47 +00001146 if (a->pid == wpid) {
Eric Andersen0298be82002-03-05 15:12:19 +00001147 /* Set the pid to 0 so that the process gets
1148 * restarted by run_actions() */
Erik Andersene49d5ec2000-02-08 19:58:47 +00001149 a->pid = 0;
Eric Andersen0298be82002-03-05 15:12:19 +00001150 message(LOG, "Process '%s' (pid %d) exited. "
1151 "Scheduling it for restart.\n", a->command, wpid);
Erik Andersene49d5ec2000-02-08 19:58:47 +00001152 }
1153 }
1154 }
Erik Andersene49d5ec2000-02-08 19:58:47 +00001155 }
Eric Andersencc8ed391999-10-05 16:24:54 +00001156}
Erik Andersen029011b2000-03-04 21:19:32 +00001157
1158/*
1159Local Variables:
1160c-file-style: "linux"
1161c-basic-offset: 4
1162tab-width: 4
1163End:
1164*/