Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Mini init implementation for busybox |
| 3 | * |
| 4 | * |
| 5 | * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>. |
| 6 | * Adjusted by so many folks, it's impossible to keep track. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | */ |
| 23 | |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 24 | #include "internal.h" |
| 25 | #include <stdio.h> |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 26 | #include <string.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 27 | #include <stdlib.h> |
| 28 | #include <stdarg.h> |
| 29 | #include <unistd.h> |
| 30 | #include <errno.h> |
| 31 | #include <signal.h> |
| 32 | #include <termios.h> |
Eric Andersen | b186d98 | 1999-12-03 09:19:54 +0000 | [diff] [blame] | 33 | #include <paths.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 34 | #include <sys/types.h> |
| 35 | #include <sys/fcntl.h> |
| 36 | #include <sys/wait.h> |
| 37 | #include <string.h> |
| 38 | #include <sys/mount.h> |
| 39 | #include <sys/reboot.h> |
| 40 | #include <sys/kdaemon.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 41 | #include <sys/sysmacros.h> |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 42 | #include <linux/serial.h> /* for serial_struct */ |
| 43 | #include <sys/vt.h> /* for vt_stat */ |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 44 | #include <sys/ioctl.h> |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 45 | #include <linux/version.h> |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 46 | #ifdef BB_SYSLOGD |
| 47 | #include <sys/syslog.h> |
| 48 | #endif |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 49 | |
Eric Andersen | 0ecb54a | 1999-12-05 23:24:55 +0000 | [diff] [blame] | 50 | #if ! defined BB_FEATURE_USE_PROCFS |
| 51 | #error Sorry, I depend on the /proc filesystem right now. |
| 52 | #endif |
| 53 | |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 54 | #ifndef KERNEL_VERSION |
| 55 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) |
| 56 | #endif |
| 57 | |
Eric Andersen | 0ecb54a | 1999-12-05 23:24:55 +0000 | [diff] [blame] | 58 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 59 | #define VT_PRIMARY "/dev/tty1" /* Primary virtual console */ |
| 60 | #define VT_SECONDARY "/dev/tty2" /* Virtual console */ |
| 61 | #define VT_LOG "/dev/tty3" /* Virtual console */ |
| 62 | #define SERIAL_CON0 "/dev/ttyS0" /* Primary serial console */ |
| 63 | #define SERIAL_CON1 "/dev/ttyS1" /* Serial console */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 64 | #define SHELL "/bin/sh" /* Default shell */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 65 | #define INITTAB "/etc/inittab" /* inittab file location */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 66 | #ifndef INIT_SCRIPT |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 67 | #define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 68 | #endif |
Erik Andersen | 9c88cac | 1999-12-30 09:25:17 +0000 | [diff] [blame] | 69 | |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 70 | #define LOG 0x1 |
| 71 | #define CONSOLE 0x2 |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 72 | |
| 73 | /* Allowed init action types */ |
| 74 | typedef enum { |
| 75 | SYSINIT=1, |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 76 | RESPAWN, |
| 77 | ASKFIRST, |
| 78 | WAIT, |
| 79 | ONCE |
| 80 | } initActionEnum; |
| 81 | |
| 82 | /* And now a list of the actions we support in the version of init */ |
| 83 | typedef struct initActionType{ |
| 84 | const char* name; |
| 85 | initActionEnum action; |
| 86 | } initActionType; |
| 87 | |
| 88 | static const struct initActionType actions[] = { |
| 89 | {"sysinit", SYSINIT}, |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 90 | {"respawn", RESPAWN}, |
| 91 | {"askfirst", ASKFIRST}, |
| 92 | {"wait", WAIT}, |
| 93 | {"once", ONCE}, |
| 94 | {0} |
| 95 | }; |
| 96 | |
| 97 | /* Set up a linked list of initactions, to be read from inittab */ |
| 98 | typedef struct initActionTag initAction; |
| 99 | struct initActionTag { |
| 100 | pid_t pid; |
| 101 | char process[256]; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 102 | char console[256]; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 103 | initAction *nextPtr; |
| 104 | initActionEnum action; |
| 105 | }; |
| 106 | initAction* initActionList = NULL; |
| 107 | |
| 108 | |
Eric Andersen | b186d98 | 1999-12-03 09:19:54 +0000 | [diff] [blame] | 109 | static char *console = _PATH_CONSOLE; |
Eric Andersen | be971d6 | 1999-11-03 16:52:50 +0000 | [diff] [blame] | 110 | static char *second_console = VT_SECONDARY; |
| 111 | static char *log = VT_LOG; |
Eric Andersen | e18c75a | 1999-11-05 04:23:05 +0000 | [diff] [blame] | 112 | static int kernel_version = 0; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 113 | |
| 114 | |
| 115 | /* try to open up the specified device */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 116 | int device_open(char *device, int mode) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 117 | { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 118 | int m, f, fd = -1; |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 119 | |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 120 | m = mode | O_NONBLOCK; |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 121 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 122 | /* Retry up to 5 times */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 123 | for (f = 0; f < 5; f++) |
| 124 | if ((fd = open(device, m)) >= 0) |
| 125 | break; |
| 126 | if (fd < 0) |
| 127 | return fd; |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 128 | /* Reset original flags. */ |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 129 | if (m != mode) |
| 130 | fcntl(fd, F_SETFL, mode); |
| 131 | return fd; |
| 132 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 133 | |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 134 | /* print a message to the specified device: |
| 135 | * device may be bitwise-or'd from LOG | CONSOLE */ |
| 136 | void message(int device, char *fmt, ...) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 137 | { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 138 | va_list arguments; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 139 | int fd; |
| 140 | |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 141 | #ifdef BB_SYSLOGD |
| 142 | |
| 143 | /* Log the message to syslogd */ |
| 144 | if (device & LOG ) { |
| 145 | char msg[1024]; |
| 146 | va_start(arguments, fmt); |
| 147 | vsnprintf(msg, sizeof(msg), fmt, arguments); |
| 148 | va_end(arguments); |
| 149 | syslog(LOG_DAEMON|LOG_NOTICE, msg); |
| 150 | } |
| 151 | |
| 152 | #else |
| 153 | static int log_fd=-1; |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 154 | |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 155 | /* Take full control of the log tty, and never close it. |
| 156 | * It's mine, all mine! Muhahahaha! */ |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 157 | if (log_fd < 0) { |
| 158 | if (log == NULL) { |
| 159 | /* don't even try to log, because there is no such console */ |
| 160 | log_fd = -2; |
| 161 | /* log to main console instead */ |
| 162 | device = CONSOLE; |
| 163 | } |
| 164 | else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) { |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 165 | log_fd=-1; |
| 166 | fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log); |
| 167 | fflush(stderr); |
| 168 | return; |
| 169 | } |
| 170 | } |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 171 | if ( (device & LOG) && (log_fd >= 0) ) { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 172 | va_start(arguments, fmt); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 173 | vdprintf(log_fd, fmt, arguments); |
Eric Andersen | a745606 | 1999-10-27 02:31:32 +0000 | [diff] [blame] | 174 | va_end(arguments); |
| 175 | } |
Eric Andersen | 4c78147 | 1999-11-26 08:12:56 +0000 | [diff] [blame] | 176 | #endif |
| 177 | |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 178 | if (device & CONSOLE) { |
Eric Andersen | ded6259 | 1999-11-18 00:19:26 +0000 | [diff] [blame] | 179 | /* Always send console messages to /dev/console so people will see them. */ |
Eric Andersen | b186d98 | 1999-12-03 09:19:54 +0000 | [diff] [blame] | 180 | if ((fd = device_open(_PATH_CONSOLE, O_WRONLY|O_NOCTTY|O_NDELAY)) >= 0) { |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 181 | va_start(arguments, fmt); |
| 182 | vdprintf(fd, fmt, arguments); |
| 183 | va_end(arguments); |
| 184 | close(fd); |
| 185 | } else { |
| 186 | fprintf(stderr, "Bummer, can't print: "); |
| 187 | va_start(arguments, fmt); |
| 188 | vfprintf(stderr, fmt, arguments); |
| 189 | fflush(stderr); |
| 190 | va_end(arguments); |
| 191 | } |
| 192 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 193 | } |
| 194 | |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 195 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 196 | /* Set terminal settings to reasonable defaults */ |
Eric Andersen | c7c41d3 | 1999-10-28 00:24:35 +0000 | [diff] [blame] | 197 | void set_term( int fd) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 198 | { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 199 | struct termios tty; |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 200 | static const char control_characters[] = { |
| 201 | '\003', '\034', '\177', '\025', '\004', '\0', |
| 202 | '\1', '\0', '\021', '\023', '\032', '\0', '\022', |
| 203 | '\017', '\027', '\026', '\0' |
| 204 | }; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 205 | |
Eric Andersen | c7c41d3 | 1999-10-28 00:24:35 +0000 | [diff] [blame] | 206 | tcgetattr(fd, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 207 | |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 208 | /* set control chars */ |
| 209 | memcpy(tty.c_cc, control_characters, sizeof(control_characters)); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 210 | |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 211 | /* use line dicipline 0 */ |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 212 | tty.c_line = 0; |
| 213 | |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 214 | /* Make it be sane */ |
| 215 | //tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD; |
| 216 | //tty.c_cflag |= HUPCL|CLOCAL; |
| 217 | |
| 218 | /* input modes */ |
| 219 | tty.c_iflag = ICRNL|IXON|IXOFF; |
| 220 | |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 221 | /* output modes */ |
Eric Andersen | c7c41d3 | 1999-10-28 00:24:35 +0000 | [diff] [blame] | 222 | tty.c_oflag = OPOST|ONLCR; |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 223 | |
| 224 | /* local modes */ |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 225 | tty.c_lflag = ISIG|ICANON|ECHO|ECHOE|ECHOK|ECHOCTL|ECHOKE|IEXTEN; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 226 | |
Eric Andersen | c7c41d3 | 1999-10-28 00:24:35 +0000 | [diff] [blame] | 227 | tcsetattr(fd, TCSANOW, &tty); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 228 | } |
| 229 | |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 230 | /* How much memory does this machine have? */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 231 | static int mem_total() |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 232 | { |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 233 | char s[80]; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 234 | char *p = "/proc/meminfo"; |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 235 | FILE *f; |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 236 | const char pattern[] = "MemTotal:"; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 237 | |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 238 | if ((f = fopen(p, "r")) < 0) { |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 239 | message(LOG, "Error opening %s: %s\n", p, strerror( errno)); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 240 | return -1; |
| 241 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 242 | while (NULL != fgets(s, 79, f)) { |
| 243 | p = strstr(s, pattern); |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 244 | if (NULL != p) { |
| 245 | fclose(f); |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 246 | return (atoi(p + strlen(pattern))); |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 247 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 248 | } |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 249 | return -1; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 250 | } |
| 251 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 252 | static void console_init() |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 253 | { |
| 254 | int fd; |
| 255 | int tried_devcons = 0; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 256 | int tried_vtprimary = 0; |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 257 | struct serial_struct sr; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 258 | char *s; |
| 259 | |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 260 | if ((s = getenv("CONSOLE")) != NULL) { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 261 | console = s; |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 262 | } |
Eric Andersen | fbb39c8 | 1999-11-08 17:00:52 +0000 | [diff] [blame] | 263 | #if #cpu(sparc) |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 264 | /* sparc kernel supports console=tty[ab] parameter which is also |
| 265 | * passed to init, so catch it here */ |
| 266 | else if ((s = getenv("console")) != NULL) { |
| 267 | /* remap tty[ab] to /dev/ttyS[01] */ |
| 268 | if (strcmp( s, "ttya" )==0) |
| 269 | console = SERIAL_CON0; |
| 270 | else if (strcmp( s, "ttyb" )==0) |
| 271 | console = SERIAL_CON1; |
| 272 | } |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 273 | #endif |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 274 | else { |
| 275 | struct vt_stat vt; |
| 276 | static char the_console[13]; |
| 277 | |
| 278 | console = the_console; |
| 279 | /* 2.2 kernels: identify the real console backend and try to use it */ |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 280 | if (ioctl(0, TIOCGSERIAL, &sr) == 0) { |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 281 | /* this is a serial console */ |
| 282 | snprintf( the_console, sizeof the_console, "/dev/ttyS%d", sr.line ); |
| 283 | } |
| 284 | else if (ioctl(0, VT_GETSTATE, &vt) == 0) { |
| 285 | /* this is linux virtual tty */ |
| 286 | snprintf( the_console, sizeof the_console, "/dev/tty%d", vt.v_active ); |
| 287 | } else { |
Eric Andersen | b186d98 | 1999-12-03 09:19:54 +0000 | [diff] [blame] | 288 | console = _PATH_CONSOLE; |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 289 | tried_devcons++; |
| 290 | } |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 291 | } |
Eric Andersen | a745606 | 1999-10-27 02:31:32 +0000 | [diff] [blame] | 292 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 293 | while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) { |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 294 | /* Can't open selected console -- try /dev/console */ |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 295 | if (!tried_devcons) { |
| 296 | tried_devcons++; |
Eric Andersen | b186d98 | 1999-12-03 09:19:54 +0000 | [diff] [blame] | 297 | console = _PATH_CONSOLE; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 298 | continue; |
| 299 | } |
Eric Andersen | be971d6 | 1999-11-03 16:52:50 +0000 | [diff] [blame] | 300 | /* Can't open selected console -- try vt1 */ |
| 301 | if (!tried_vtprimary) { |
| 302 | tried_vtprimary++; |
| 303 | console = VT_PRIMARY; |
| 304 | continue; |
| 305 | } |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 306 | break; |
| 307 | } |
| 308 | if (fd < 0) |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 309 | /* Perhaps we should panic here? */ |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 310 | console = "/dev/null"; |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 311 | else { |
| 312 | /* check for serial console and disable logging to tty3 & running a |
| 313 | * shell to tty2 */ |
| 314 | if (ioctl(0,TIOCGSERIAL,&sr) == 0) { |
Erik Andersen | 812d466 | 2000-01-07 18:30:40 +0000 | [diff] [blame^] | 315 | message(LOG|CONSOLE, "serial console detected. Disabling virtual terminals.\r\n", console ); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 316 | log = NULL; |
| 317 | second_console = NULL; |
| 318 | } |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 319 | close(fd); |
Eric Andersen | 07e5297 | 1999-11-07 07:38:08 +0000 | [diff] [blame] | 320 | } |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 321 | message(LOG, "console=%s\n", console ); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 322 | } |
| 323 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 324 | static pid_t run(char* command, |
Eric Andersen | c7c41d3 | 1999-10-28 00:24:35 +0000 | [diff] [blame] | 325 | char *terminal, int get_enter) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 326 | { |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 327 | int i; |
Eric Andersen | c7c41d3 | 1999-10-28 00:24:35 +0000 | [diff] [blame] | 328 | pid_t pid; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 329 | char* tmpCmd; |
| 330 | char* cmd[255]; |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 331 | static const char press_enter[] = |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 332 | "\nPlease press Enter to activate this console. "; |
| 333 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 334 | if ((pid = fork()) == 0) { |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 335 | int fd; |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 336 | pid_t shell_pgid = getpid (); |
| 337 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 338 | /* Clean up */ |
| 339 | close(0); |
| 340 | close(1); |
| 341 | close(2); |
| 342 | setsid(); |
| 343 | |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 344 | if ((fd=device_open(terminal, O_RDWR)) < 0) { |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 345 | message(LOG|CONSOLE, "Bummer, can't open %s\r\n", terminal); |
| 346 | exit(1); |
| 347 | } |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 348 | dup(fd); |
| 349 | dup(fd); |
| 350 | set_term(fd); |
| 351 | tcsetpgrp (fd, getpgrp()); |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 352 | |
Eric Andersen | 2f6c04f | 1999-11-01 23:59:44 +0000 | [diff] [blame] | 353 | /* Reset signal handlers set for parent process */ |
| 354 | signal(SIGUSR1, SIG_DFL); |
| 355 | signal(SIGUSR2, SIG_DFL); |
| 356 | signal(SIGINT, SIG_DFL); |
| 357 | signal(SIGTERM, SIG_DFL); |
| 358 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 359 | |
Eric Andersen | 2f6c04f | 1999-11-01 23:59:44 +0000 | [diff] [blame] | 360 | if (get_enter==TRUE) { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 361 | /* |
| 362 | * Save memory by not exec-ing anything large (like a shell) |
| 363 | * before the user wants it. This is critical if swap is not |
| 364 | * enabled and the system has low memory. Generally this will |
| 365 | * be run on the second virtual console, and the first will |
| 366 | * be allowed to start a shell or whatever an init script |
| 367 | * specifies. |
| 368 | */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 369 | char c; |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 370 | message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n", |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 371 | command, shell_pgid, terminal ); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 372 | write(fileno(stdout), press_enter, sizeof(press_enter) - 1); |
| 373 | read(fileno(stdin), &c, 1); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 374 | } |
| 375 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 376 | /* Convert command (char*) into cmd (char**, one word per string) */ |
| 377 | for (tmpCmd=command, i=0; (tmpCmd=strsep(&command, " \t")) != NULL;) { |
| 378 | if (*tmpCmd != '\0') { |
| 379 | cmd[i] = tmpCmd; |
| 380 | tmpCmd++; |
| 381 | i++; |
| 382 | } |
| 383 | } |
| 384 | cmd[i] = NULL; |
| 385 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 386 | /* Log the process name and args */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 387 | message(LOG, "Starting pid %d, console %s: '%s'\r\n", |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 388 | shell_pgid, terminal, cmd[0]); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 389 | |
Eric Andersen | c7c41d3 | 1999-10-28 00:24:35 +0000 | [diff] [blame] | 390 | /* Now run it. The new program will take over this PID, |
Eric Andersen | a745606 | 1999-10-27 02:31:32 +0000 | [diff] [blame] | 391 | * so nothing further in init.c should be run. */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 392 | execvp(cmd[0], cmd); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 393 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 394 | /* We're still here? Some error happened. */ |
| 395 | message(LOG|CONSOLE, "Bummer, could not run '%s': %s\n", cmd[0], |
| 396 | strerror(errno)); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 397 | exit(-1); |
| 398 | } |
| 399 | return pid; |
| 400 | } |
| 401 | |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 402 | static int waitfor(char* command, |
| 403 | char *terminal, int get_enter) |
| 404 | { |
| 405 | int status, wpid; |
| 406 | int pid = run( command, terminal, get_enter); |
| 407 | |
| 408 | while (1) { |
| 409 | wpid = wait(&status); |
| 410 | if (wpid > 0 ) { |
| 411 | message(LOG, "Process '%s' (pid %d) exited.\n", |
| 412 | command, wpid); |
| 413 | break; |
| 414 | } |
| 415 | if (wpid == pid ) |
| 416 | break; |
| 417 | } |
| 418 | return wpid; |
| 419 | } |
| 420 | |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 421 | /* Make sure there is enough memory to do something useful. * |
| 422 | * Calls swapon if needed so be sure /proc is mounted. */ |
| 423 | static void check_memory() |
| 424 | { |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 425 | struct stat statBuf; |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 426 | |
| 427 | if (mem_total() > 3500) |
| 428 | return; |
| 429 | |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 430 | if (stat("/etc/fstab", &statBuf) == 0) { |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 431 | /* Try to turn on swap */ |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 432 | waitfor("/bin/swapon swapon -a", log, FALSE); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 433 | if (mem_total() < 3500) |
| 434 | goto goodnight; |
| 435 | } else |
| 436 | goto goodnight; |
| 437 | return; |
| 438 | |
| 439 | goodnight: |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 440 | message(CONSOLE, "Sorry, your computer does not have enough memory.\r\n"); |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 441 | while (1) sleep(1); |
| 442 | } |
| 443 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 444 | #ifndef DEBUG_INIT |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 445 | static void shutdown_system(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 446 | { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 447 | /* Allow Ctrl-Alt-Del to reboot system. */ |
| 448 | reboot(RB_ENABLE_CAD); |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 449 | message(CONSOLE, "\r\nThe system is going down NOW !!\r\n"); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 450 | sync(); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 451 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 452 | /* Send signals to every process _except_ pid 1 */ |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 453 | message(CONSOLE, "Sending SIGHUP to all processes.\r\n"); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 454 | kill(-1, SIGHUP); |
| 455 | sleep(2); |
| 456 | sync(); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 457 | |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 458 | message(CONSOLE, "Sending SIGKILL to all processes.\r\n"); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 459 | kill(-1, SIGKILL); |
| 460 | sleep(1); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 461 | |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 462 | message(CONSOLE, "Disabling swap.\r\n"); |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 463 | waitfor( "swapoff -a", console, FALSE); |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 464 | message(CONSOLE, "Unmounting filesystems.\r\n"); |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 465 | waitfor("umount -a", console, FALSE); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 466 | sync(); |
Eric Andersen | e18c75a | 1999-11-05 04:23:05 +0000 | [diff] [blame] | 467 | if (kernel_version > 0 && kernel_version <= 2 * 65536 + 2 * 256 + 11) { |
Eric Andersen | cf8c9cf | 1999-11-05 00:31:46 +0000 | [diff] [blame] | 468 | /* bdflush, kupdate not needed for kernels >2.2.11 */ |
| 469 | bdflush(1, 0); |
| 470 | sync(); |
| 471 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 472 | } |
| 473 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 474 | static void halt_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 475 | { |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 476 | shutdown_system(); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 477 | message(CONSOLE, |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 478 | "The system is halted. Press CTRL-ALT-DEL or turn off power\r\n"); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 479 | sync(); |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 480 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0) |
Eric Andersen | 2cb5507 | 1999-12-10 08:25:07 +0000 | [diff] [blame] | 481 | if (sig == SIGUSR2) |
| 482 | reboot(RB_POWER_OFF); |
| 483 | else |
Erik Andersen | 4d1d011 | 1999-12-17 18:44:15 +0000 | [diff] [blame] | 484 | #endif |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 485 | reboot(RB_HALT_SYSTEM); |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 486 | exit(0); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 487 | } |
| 488 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 489 | static void reboot_signal(int sig) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 490 | { |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 491 | shutdown_system(); |
Eric Andersen | 3ae0c78 | 1999-11-04 01:13:21 +0000 | [diff] [blame] | 492 | message(CONSOLE, "Please stand by while rebooting the system.\r\n"); |
| 493 | sync(); |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 494 | reboot(RB_AUTOBOOT); |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 495 | exit(0); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 496 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 497 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 498 | #endif |
| 499 | |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 500 | void new_initAction (initActionEnum action, |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 501 | char* process, char* cons) |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 502 | { |
| 503 | initAction* newAction; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 504 | |
| 505 | /* If BusyBox detects that a serial console is in use, |
| 506 | * then entries containing non-empty id fields will _not_ be run. |
| 507 | */ |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 508 | if (second_console == NULL && *cons != '\0') { |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 509 | return; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 510 | } |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 511 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 512 | newAction = calloc ((size_t)(1), sizeof(initAction)); |
| 513 | if (!newAction) { |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 514 | message(LOG|CONSOLE,"Memory allocation failure\n"); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 515 | while (1) sleep(1); |
| 516 | } |
| 517 | newAction->nextPtr = initActionList; |
| 518 | initActionList = newAction; |
| 519 | strncpy( newAction->process, process, 255); |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 520 | newAction->action = action; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 521 | if (*cons != '\0') { |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 522 | strncpy(newAction->console, cons, 255); |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 523 | } else |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 524 | strncpy(newAction->console, console, 255); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 525 | newAction->pid = 0; |
Erik Andersen | 812d466 | 2000-01-07 18:30:40 +0000 | [diff] [blame^] | 526 | // message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n", |
| 527 | // newAction->process, newAction->action, newAction->console); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | void delete_initAction (initAction *action) |
| 531 | { |
| 532 | initAction *a, *b=NULL; |
| 533 | for( a=initActionList ; a; b=a, a=a->nextPtr) { |
| 534 | if (a == action && b != NULL) { |
| 535 | b->nextPtr=a->nextPtr; |
| 536 | free( a); |
| 537 | break; |
| 538 | } |
| 539 | } |
| 540 | } |
| 541 | |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 542 | /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined, |
| 543 | * then parse_inittab() simply adds in some default |
| 544 | * actions(i.e runs INIT_SCRIPT and then starts a pair |
Erik Andersen | 812d466 | 2000-01-07 18:30:40 +0000 | [diff] [blame^] | 545 | * of "askfirst" shells). If BB_FEATURE_USE_INITTAB |
| 546 | * _is_ defined, but /etc/inittab is missing, this |
| 547 | * results in the same set of default behaviors. |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 548 | * */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 549 | void parse_inittab(void) |
| 550 | { |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 551 | #ifdef BB_FEATURE_USE_INITTAB |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 552 | FILE* file; |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 553 | char buf[256], lineAsRead[256], tmpConsole[256]; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 554 | char *p, *q, *r, *s; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 555 | const struct initActionType *a = actions; |
| 556 | int foundIt; |
| 557 | |
| 558 | |
| 559 | file = fopen(INITTAB, "r"); |
| 560 | if (file == NULL) { |
| 561 | /* No inittab file -- set up some default behavior */ |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 562 | #endif |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 563 | /* Askfirst shell on tty1 */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 564 | new_initAction( ASKFIRST, SHELL, console ); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 565 | /* Askfirst shell on tty2 */ |
| 566 | if (second_console != NULL) |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 567 | new_initAction( ASKFIRST, SHELL, second_console ); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 568 | /* sysinit */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 569 | new_initAction( SYSINIT, INIT_SCRIPT, console ); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 570 | |
| 571 | return; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 572 | #ifdef BB_FEATURE_USE_INITTAB |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | while ( fgets(buf, 255, file) != NULL) { |
| 576 | foundIt=FALSE; |
| 577 | for(p = buf; *p == ' ' || *p == '\t'; p++); |
| 578 | if (*p == '#' || *p == '\n') continue; |
| 579 | |
| 580 | /* Trim the trailing \n */ |
| 581 | q = strrchr( p, '\n'); |
| 582 | if (q != NULL) |
| 583 | *q='\0'; |
| 584 | |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 585 | /* Keep a copy around for posterity's sake (and error msgs) */ |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 586 | strcpy(lineAsRead, buf); |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 587 | |
| 588 | /* Grab the ID field */ |
| 589 | s=p; |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 590 | p = strchr( p, ':'); |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 591 | if ( p != NULL || *(p+1) != '\0' ) { |
| 592 | *p='\0'; |
| 593 | ++p; |
| 594 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 595 | |
| 596 | /* Now peal off the process field from the end |
| 597 | * of the string */ |
| 598 | q = strrchr( p, ':'); |
| 599 | if ( q == NULL || *(q+1) == '\0' ) { |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 600 | message(LOG|CONSOLE,"Bad inittab entry: %s\n", lineAsRead); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 601 | continue; |
| 602 | } else { |
| 603 | *q='\0'; |
| 604 | ++q; |
| 605 | } |
| 606 | |
| 607 | /* Now peal off the action field */ |
| 608 | r = strrchr( p, ':'); |
| 609 | if ( r == NULL || *(r+1) == '\0') { |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 610 | message(LOG|CONSOLE,"Bad inittab entry: %s\n", lineAsRead); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 611 | continue; |
| 612 | } else { |
| 613 | ++r; |
| 614 | } |
| 615 | |
| 616 | /* Ok, now process it */ |
| 617 | a = actions; |
| 618 | while (a->name != 0) { |
| 619 | if (strcmp(a->name, r) == 0) { |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 620 | if (*s != '\0') { |
| 621 | struct stat statBuf; |
| 622 | strcpy(tmpConsole, "/dev/"); |
| 623 | strncat(tmpConsole, s, 200); |
| 624 | if (stat(tmpConsole, &statBuf) != 0) { |
| 625 | message(LOG|CONSOLE, "device '%s' does not exist. Did you read the directions?\n", tmpConsole); |
| 626 | break; |
| 627 | } |
| 628 | s = tmpConsole; |
| 629 | } |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 630 | new_initAction( a->action, q, s); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 631 | foundIt=TRUE; |
| 632 | } |
| 633 | a++; |
| 634 | } |
| 635 | if (foundIt==TRUE) |
| 636 | continue; |
| 637 | else { |
| 638 | /* Choke on an unknown action */ |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 639 | message(LOG|CONSOLE, "Bad inittab entry: %s\n", lineAsRead); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 640 | } |
| 641 | } |
| 642 | return; |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 643 | #endif |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 644 | } |
| 645 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 646 | extern int init_main(int argc, char **argv) |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 647 | { |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 648 | initAction *a; |
| 649 | pid_t wpid; |
| 650 | int status; |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 651 | |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 652 | #ifndef DEBUG_INIT |
Eric Andersen | 0727458 | 1999-11-21 21:50:07 +0000 | [diff] [blame] | 653 | /* Expect to be PID 1 iff we are run as init (not linuxrc) */ |
| 654 | if (getpid() != 1 && strstr(argv[0], "init")!=NULL ) { |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 655 | usage( "init\n\nInit is the parent of all processes.\n\n" |
| 656 | "This version of init is designed to be run only by the kernel\n"); |
| 657 | } |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 658 | |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 659 | /* from the controlling terminal */ |
| 660 | setsid(); |
| 661 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 662 | /* Set up sig handlers -- be sure to clear all of these in run() */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 663 | signal(SIGUSR1, halt_signal); |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 664 | signal(SIGUSR2, reboot_signal); |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 665 | signal(SIGINT, reboot_signal); |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 666 | signal(SIGTERM, reboot_signal); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 667 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 668 | /* Turn off rebooting via CTL-ALT-DEL -- we get a |
| 669 | * SIGINT on CAD so we can shut things down gracefully... */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 670 | reboot(RB_DISABLE_CAD); |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 671 | #endif |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 672 | |
Eric Andersen | c7c41d3 | 1999-10-28 00:24:35 +0000 | [diff] [blame] | 673 | /* Figure out where the default console should be */ |
| 674 | console_init(); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame] | 675 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 676 | /* Close whatever files are open, and reset the console. */ |
| 677 | close(0); |
| 678 | close(1); |
| 679 | close(2); |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 680 | set_term(0); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 681 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 682 | /* Make sure PATH is set to something sane */ |
Eric Andersen | b186d98 | 1999-12-03 09:19:54 +0000 | [diff] [blame] | 683 | putenv(_PATH_STDPATH); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 684 | |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 685 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 686 | /* Hello world */ |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 687 | #ifndef DEBUG_INIT |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 688 | message(LOG|CONSOLE, |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 689 | "init started: BusyBox v%s (%s) multi-call binary\r\n", |
| 690 | BB_VER, BB_BT); |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 691 | #else |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 692 | message(LOG|CONSOLE, |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 693 | "init(%d) started: BusyBox v%s (%s) multi-call binary\r\n", |
| 694 | getpid(), BB_VER, BB_BT); |
Eric Andersen | 7f1acfd | 1999-10-29 23:09:13 +0000 | [diff] [blame] | 695 | #endif |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 696 | |
Eric Andersen | c7c41d3 | 1999-10-28 00:24:35 +0000 | [diff] [blame] | 697 | |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 698 | /* Mount /proc */ |
Eric Andersen | e18c75a | 1999-11-05 04:23:05 +0000 | [diff] [blame] | 699 | if (mount ("proc", "/proc", "proc", 0, 0) == 0) { |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 700 | message(LOG|CONSOLE, "Mounting /proc: done.\n"); |
Eric Andersen | e18c75a | 1999-11-05 04:23:05 +0000 | [diff] [blame] | 701 | kernel_version = get_kernel_revision(); |
| 702 | } else |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 703 | message(LOG|CONSOLE, "Mounting /proc: failed!\n"); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 704 | |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 705 | /* Make sure there is enough memory to do something useful. */ |
| 706 | check_memory(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 707 | |
Eric Andersen | d00c262 | 1999-12-07 08:37:31 +0000 | [diff] [blame] | 708 | /* Check if we are supposed to be in single user mode */ |
| 709 | if ( argc > 1 && (!strcmp(argv[1], "single") || |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 710 | !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) |
| 711 | { |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 712 | /* Ask first then start a shell on tty2 */ |
| 713 | if (second_console != NULL) |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 714 | new_initAction( ASKFIRST, SHELL, second_console); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 715 | /* Ask first then start a shell on tty1 */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 716 | new_initAction( ASKFIRST, SHELL, console); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 717 | } else { |
| 718 | /* Not in single user mode -- see what inittab says */ |
Erik Andersen | 9e73725 | 2000-01-06 01:16:13 +0000 | [diff] [blame] | 719 | |
| 720 | /* NOTE that if BB_FEATURE_USE_INITTAB is NOT defined, |
| 721 | * then parse_inittab() simply adds in some default |
| 722 | * actions(i.e runs INIT_SCRIPT and then starts a pair |
| 723 | * of "askfirst" shells */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 724 | parse_inittab(); |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 725 | } |
| 726 | |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 727 | /* Now run everything that needs to be run */ |
Eric Andersen | 84b0092 | 1999-12-11 04:16:51 +0000 | [diff] [blame] | 728 | |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 729 | message(LOG|CONSOLE, "Running SYSINIT\n"); |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 730 | /* First run the sysinit command */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 731 | for( a=initActionList ; a; a=a->nextPtr) { |
| 732 | if (a->action == SYSINIT) { |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 733 | waitfor(a->process, a->console, FALSE); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 734 | /* Now remove the "sysinit" entry from the list */ |
| 735 | delete_initAction( a); |
Eric Andersen | d00c262 | 1999-12-07 08:37:31 +0000 | [diff] [blame] | 736 | } |
| 737 | } |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 738 | /* Next run anything that wants to block */ |
| 739 | for( a=initActionList ; a; a=a->nextPtr) { |
| 740 | if (a->action == WAIT) { |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 741 | waitfor(a->process, a->console, FALSE); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 742 | /* Now remove the "wait" entry from the list */ |
| 743 | delete_initAction( a); |
| 744 | } |
| 745 | } |
| 746 | /* Next run anything to be run only once */ |
| 747 | for( a=initActionList ; a; a=a->nextPtr) { |
| 748 | if (a->action == ONCE) { |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 749 | run(a->process, a->console, FALSE); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 750 | /* Now remove the "once" entry from the list */ |
| 751 | delete_initAction( a); |
| 752 | } |
| 753 | } |
Erik Andersen | 0e3782f | 2000-01-07 02:54:55 +0000 | [diff] [blame] | 754 | /* If there is nothing else to do, stop */ |
| 755 | if (initActionList == NULL) { |
| 756 | message(LOG|CONSOLE, "No more tasks for init -- sleeping forever.\n"); |
| 757 | while (1) sleep(1); |
| 758 | } |
Eric Andersen | 219d6f5 | 1999-11-02 19:43:01 +0000 | [diff] [blame] | 759 | |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 760 | /* Now run the looping stuff for the rest of forever */ |
| 761 | while (1) { |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 762 | for( a=initActionList ; a; a=a->nextPtr) { |
| 763 | /* Only run stuff with pid==0. If they have |
| 764 | * a pid, that means they are still running */ |
| 765 | if (a->pid == 0) { |
| 766 | switch(a->action) { |
| 767 | case RESPAWN: |
| 768 | /* run the respawn stuff */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 769 | a->pid = run(a->process, a->console, FALSE); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 770 | break; |
| 771 | case ASKFIRST: |
| 772 | /* run the askfirst stuff */ |
Erik Andersen | 96e2abd | 2000-01-07 11:40:44 +0000 | [diff] [blame] | 773 | a->pid = run(a->process, a->console, TRUE); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 774 | break; |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 775 | /* silence the compiler's incessant whining */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 776 | default: |
| 777 | break; |
| 778 | } |
| 779 | } |
| 780 | } |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 781 | /* Wait for a child process to exit */ |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 782 | wpid = wait(&status); |
Eric Andersen | a745606 | 1999-10-27 02:31:32 +0000 | [diff] [blame] | 783 | if (wpid > 0 ) { |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 784 | /* Find out who died and clean up their corpse */ |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 785 | for( a=initActionList ; a; a=a->nextPtr) { |
| 786 | if (a->pid==wpid) { |
| 787 | a->pid=0; |
Erik Andersen | 0881de7 | 2000-01-05 09:34:26 +0000 | [diff] [blame] | 788 | message(LOG, "Process '%s' (pid %d) exited. Scheduling it for restart.\n", |
| 789 | a->process, wpid); |
Erik Andersen | 7dc1607 | 2000-01-04 01:10:25 +0000 | [diff] [blame] | 790 | } |
Eric Andersen | b6a44b8 | 1999-11-13 04:47:09 +0000 | [diff] [blame] | 791 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 792 | } |
Eric Andersen | 8a8fbb8 | 1999-10-26 00:18:56 +0000 | [diff] [blame] | 793 | sleep(1); |
| 794 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 795 | } |
Erik Andersen | 9c88cac | 1999-12-30 09:25:17 +0000 | [diff] [blame] | 796 | |