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> |
| 26 | #include <stdlib.h> |
| 27 | #include <stdarg.h> |
| 28 | #include <unistd.h> |
| 29 | #include <errno.h> |
| 30 | #include <signal.h> |
| 31 | #include <termios.h> |
| 32 | #include <sys/types.h> |
| 33 | #include <sys/fcntl.h> |
| 34 | #include <sys/wait.h> |
| 35 | #include <string.h> |
| 36 | #include <sys/mount.h> |
| 37 | #include <sys/reboot.h> |
| 38 | #include <sys/kdaemon.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 39 | #include <sys/sysmacros.h> |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 40 | #include <linux/serial.h> /* for serial_struct */ |
| 41 | #include <sys/vt.h> /* for vt_stat */ |
| 42 | #include <sys/ioctl.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 43 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 44 | #define DEBUG_INIT |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 45 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 46 | #define CONSOLE "/dev/console" /* Logical system console */ |
| 47 | #define VT_PRIMARY "/dev/tty0" /* Virtual console master */ |
| 48 | #define VT_SECONDARY "/dev/tty1" /* Virtual console master */ |
| 49 | #define VT_LOG "/dev/tty2" /* Virtual console master */ |
| 50 | #define SHELL "/bin/sh" /* Default shell */ |
| 51 | #define INITSCRIPT "/etc/init.d/rcS" /* Initscript. */ |
| 52 | #define PATH_DEFAULT "PATH=/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin" |
| 53 | |
| 54 | static int maxproclen=0; |
| 55 | static char* argv0; |
| 56 | |
| 57 | static char* console = CONSOLE; |
| 58 | static char* second_terminal = "/dev/tty2"; |
| 59 | static char* log = "/dev/tty3"; |
| 60 | |
| 61 | |
| 62 | |
| 63 | /* try to open up the specified device */ |
| 64 | int device_open(char* device, int mode) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 65 | { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 66 | int m, f, fd = -1; |
| 67 | |
| 68 | mode = m | O_NONBLOCK; |
| 69 | |
| 70 | /* Retry up to 5 times */ |
| 71 | for(f = 0; f < 5; f++) |
| 72 | if ((fd = open(device, m)) >= 0) break; |
| 73 | if (fd < 0) return fd; |
| 74 | /* Set original flags. */ |
| 75 | if (m != mode) |
| 76 | fcntl(fd, F_SETFL, mode); |
| 77 | return fd; |
| 78 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 79 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 80 | /* print a message to the specified device */ |
| 81 | void message(char* device, char *fmt, ...) |
| 82 | { |
| 83 | int fd; |
| 84 | va_list arguments; |
| 85 | if ((fd = device_open(device, O_WRONLY|O_NOCTTY|O_NDELAY)) >= 0) { |
| 86 | va_start(arguments, fmt); |
| 87 | vdprintf(fd, fmt, arguments); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 88 | va_end(arguments); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 89 | } |
| 90 | close( fd); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 91 | } |
| 92 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 93 | /* Set terminal settings to reasonable defaults */ |
| 94 | void set_term() |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 95 | { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 96 | int fd; |
| 97 | struct termios tty; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 98 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 99 | if ((fd = device_open(console, O_RDWR|O_NOCTTY)) < 0) { |
| 100 | message(log, "can't open %s", console); |
| 101 | return; |
| 102 | } |
| 103 | ioctl(fd, TCGETS, &tty); |
| 104 | tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD; |
| 105 | tty.c_cflag |= HUPCL|CLOCAL; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 106 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 107 | tty.c_cc[VINTR] = 3; |
| 108 | tty.c_cc[VQUIT] = 28; |
| 109 | tty.c_cc[VERASE] = 127; |
| 110 | tty.c_cc[VKILL] = 24; |
| 111 | tty.c_cc[VEOF] = 4; |
| 112 | tty.c_cc[VTIME] = 0; |
| 113 | tty.c_cc[VMIN] = 1; |
| 114 | tty.c_cc[VSTART] = 17; |
| 115 | tty.c_cc[VSTOP] = 19; |
| 116 | tty.c_cc[VSUSP] = 26; |
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 | /* Set pre and post processing */ |
| 119 | tty.c_iflag = IGNPAR|ICRNL|IXON|IXANY; |
| 120 | tty.c_oflag = OPOST|ONLCR; |
| 121 | tty.c_lflag = ISIG|ICANON|ECHO|ECHOCTL|ECHOPRT|ECHOKE; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 122 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 123 | /* Now set the terminal line. */ |
| 124 | ioctl(fd, TCSETS, &tty); |
| 125 | close( fd); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | static int |
| 129 | mem_total() |
| 130 | { |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 131 | char s[80]; |
| 132 | char *p; |
| 133 | FILE *f; |
| 134 | const char pattern[]="MemTotal:"; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 135 | |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 136 | f=fopen("/proc/meminfo","r"); |
| 137 | while (NULL != fgets(s,79,f)) { |
| 138 | p=strstr(s, pattern); |
| 139 | if (NULL != p) { |
| 140 | fclose(f); |
| 141 | return(atoi(p+strlen(pattern))); |
| 142 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 143 | } |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 144 | return -1; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | static void |
| 148 | set_free_pages() |
| 149 | { |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 150 | char s[80]; |
| 151 | FILE *f; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 152 | |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 153 | f=fopen("/proc/sys/vm/freepages","r"); |
| 154 | fgets(s,79,f); |
| 155 | if (atoi(s) < 32) { |
| 156 | fclose(f); |
| 157 | f=fopen("/proc/sys/vm/freepages","w"); |
| 158 | fprintf(f,"30\t40\t50\n"); |
| 159 | printf("\nIncreased /proc/sys/vm/freepages values to 30/40/50\n"); |
| 160 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 161 | fclose(f); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 162 | } |
| 163 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 164 | |
| 165 | static void |
| 166 | console_init() |
| 167 | { |
| 168 | int fd; |
| 169 | int tried_devcons = 0; |
| 170 | int tried_vtmaster = 0; |
| 171 | char *s; |
| 172 | |
| 173 | if ((s = getenv("CONSOLE")) != NULL) |
| 174 | console = s; |
| 175 | else { |
| 176 | console = CONSOLE; |
| 177 | tried_devcons++; |
| 178 | } |
| 179 | while ((fd = open(console, O_RDONLY|O_NONBLOCK)) < 0) { |
| 180 | if (!tried_devcons) { |
| 181 | tried_devcons++; |
| 182 | console = CONSOLE; |
| 183 | continue; |
| 184 | } |
| 185 | if (!tried_vtmaster) { |
| 186 | tried_vtmaster++; |
| 187 | console = VT_PRIMARY; |
| 188 | continue; |
| 189 | } |
| 190 | break; |
| 191 | } |
| 192 | if (fd < 0) |
| 193 | console = "/dev/null"; |
| 194 | else |
| 195 | close(fd); |
| 196 | } |
| 197 | |
| 198 | static int |
| 199 | waitfor(int pid) |
| 200 | { |
| 201 | int status, wpid; |
| 202 | |
| 203 | message(log, "Waiting for process %d.\n", pid); |
| 204 | while ( (wpid = wait(&status)) != pid ) { |
| 205 | if ( wpid > 0 ) |
| 206 | message(log,"pid %d exited, status=%x.\n", wpid, status); |
| 207 | } |
| 208 | return wpid; |
| 209 | } |
| 210 | |
| 211 | static int |
| 212 | run(const char* command, char* terminal, int get_enter) |
| 213 | { |
| 214 | int f, pid; |
| 215 | char *args[16]; |
| 216 | char buf[256]; |
| 217 | char* ptr; |
| 218 | static const char press_enter[] = |
| 219 | "\nPlease press Enter to activate this console. "; |
| 220 | |
| 221 | |
| 222 | /* Make a proper command from the command string */ |
| 223 | strcpy(buf, command); |
| 224 | ptr = buf; |
| 225 | for(f = 1; f < 15; f++) { |
| 226 | /* Skip white space */ |
| 227 | while(*ptr == ' ' || *ptr == '\t') ptr++; |
| 228 | args[f] = ptr; |
| 229 | /* May be trailing space.. */ |
| 230 | if (*ptr == 0) break; |
| 231 | /* Skip this `word' */ |
| 232 | while(*ptr && *ptr != ' ' && *ptr != '\t' && *ptr != '#') |
| 233 | ptr++; |
| 234 | /* If end-of-line, break */ |
| 235 | if (*ptr == '#' || *ptr == 0) { |
| 236 | f++; |
| 237 | *ptr = 0; |
| 238 | break; |
| 239 | } |
| 240 | /* End word with \0 and continue */ |
| 241 | args[f] = NULL; |
| 242 | } |
| 243 | args[0] = args[1]; |
| 244 | |
| 245 | |
| 246 | if ((pid = fork()) == 0) { |
| 247 | /* Clean up */ |
| 248 | close(0); |
| 249 | close(1); |
| 250 | close(2); |
| 251 | setsid(); |
| 252 | |
| 253 | if ((f = device_open(terminal, O_RDWR|O_NOCTTY)) < 0) { |
| 254 | message( log, "open(%s) failed: %s", terminal, strerror(errno)); |
| 255 | return -1; |
| 256 | } |
| 257 | dup(f); |
| 258 | dup(f); |
| 259 | tcsetpgrp(0, getpgrp()); |
| 260 | set_term(); |
| 261 | |
| 262 | if ( get_enter ) { |
| 263 | /* |
| 264 | * Save memory by not exec-ing anything large (like a shell) |
| 265 | * before the user wants it. This is critical if swap is not |
| 266 | * enabled and the system has low memory. Generally this will |
| 267 | * be run on the second virtual console, and the first will |
| 268 | * be allowed to start a shell or whatever an init script |
| 269 | * specifies. |
| 270 | */ |
| 271 | char c; |
| 272 | write(1, press_enter, sizeof(press_enter) - 1); |
| 273 | read(0, &c, 1); |
| 274 | } |
| 275 | |
| 276 | /* Log the process name and args */ |
| 277 | message(log, "Executing '%s'\n", command); |
| 278 | |
| 279 | /* Now run it. This should take over the PID, so nothing |
| 280 | * further in init.c should be run by this PID. */ |
| 281 | execvp(args[1], args + 1); |
| 282 | |
| 283 | /* If shell scripts are not executed, force the issue */ |
| 284 | if (errno == ENOEXEC) { |
| 285 | char buf[256]; |
| 286 | args[1] = SHELL; |
| 287 | args[2] = "-c"; |
| 288 | strcpy(buf, "exec "); |
| 289 | strcat(buf, command); |
| 290 | args[3] = buf; |
| 291 | args[4] = NULL; |
| 292 | execvp(args[1], args + 1); |
| 293 | } |
| 294 | message(log, "Could not execute '%s'\n", command, strerror(errno)); |
| 295 | exit(-1); |
| 296 | } |
| 297 | return pid; |
| 298 | } |
| 299 | |
| 300 | #ifndef DEBUG_INIT |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 301 | static void |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 302 | shutdown_system(void) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 303 | { |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 304 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 305 | message(console, "The system is going down NOW !!"); |
| 306 | sync(); |
| 307 | /* Allow Ctrl-Alt-Del to reboot system. */ |
| 308 | reboot(RB_ENABLE_CAD); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 309 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 310 | /* Send signals to every process _except_ pid 1 */ |
| 311 | message(console, "Sending SIGHUP to all processes.\r\n"); |
| 312 | kill(-1, SIGHUP); |
| 313 | sleep(2); |
| 314 | sync(); |
| 315 | message(console, "Sending SIGKILL to all processes.\r\n"); |
| 316 | kill(-1, SIGKILL); |
| 317 | sleep(1); |
| 318 | waitfor(run("/bin/swapoff -a", console, 0)); |
| 319 | waitfor(run("/bin/umount -a -n", console, 0)); |
| 320 | sync(); |
| 321 | if (get_kernel_revision() <= 2*65536+2*256+11) { |
| 322 | /* Removed bdflush call, kupdate in kernels >2.2.11 */ |
| 323 | bdflush(1, 0); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 324 | sync(); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 325 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | static void |
| 329 | halt_signal(int sig) |
| 330 | { |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 331 | shutdown_system(); |
| 332 | message(console, "The system is halted. Press CTRL-ALT-DEL or turn off power\r\n"); |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 333 | reboot( RB_POWER_OFF); |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 334 | exit(0); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 335 | } |
| 336 | |
| 337 | static void |
| 338 | reboot_signal(int sig) |
| 339 | { |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 340 | shutdown_system(); |
| 341 | message(console, "Please stand by while rebooting the system.\r\n"); |
| 342 | reboot( RB_AUTOBOOT); |
| 343 | exit(0); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 344 | } |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 345 | #endif |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 346 | |
| 347 | int setproctitle(char *fmt, ...) |
| 348 | { |
| 349 | va_list ap; |
| 350 | int len; |
| 351 | char buf[256]; |
| 352 | |
| 353 | buf[0] = 0; |
| 354 | va_start(ap, fmt); |
| 355 | len = vsprintf(buf, fmt, ap); |
| 356 | va_end(ap); |
| 357 | memset(argv0, 0, maxproclen + 1); |
| 358 | strncpy(argv0, buf, maxproclen); |
| 359 | return len; |
Eric Andersen | 3c16382 | 1999-10-14 22:16:57 +0000 | [diff] [blame] | 360 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 361 | |
| 362 | extern int |
Eric Andersen | 2c10301 | 1999-10-13 22:56:11 +0000 | [diff] [blame] | 363 | init_main(int argc, char * * argv) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 364 | { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 365 | int run_rc = TRUE; |
| 366 | int pid1 = 0; |
| 367 | int pid2 = 0; |
| 368 | struct stat statbuf; |
| 369 | const char* init_commands = SHELL "-c exec " INITSCRIPT; |
| 370 | const char* shell_commands = SHELL; |
| 371 | const char* tty0_commands = init_commands; |
| 372 | const char* tty1_commands = shell_commands; |
| 373 | const char* no_memory = |
| 374 | "Sorry, your computer does not have enough memory.\n"; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 375 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 376 | /* For later use */ |
| 377 | argv0 = argv[0]; |
| 378 | maxproclen = strlen(argv[0]); |
| 379 | setproctitle("init [boot]"); |
| 380 | |
| 381 | |
| 382 | #ifndef DEBUG_INIT |
| 383 | /* Set up sig handlers */ |
| 384 | signal(SIGUSR1, halt_signal); |
| 385 | signal(SIGSEGV, halt_signal); |
| 386 | signal(SIGPWR, halt_signal); |
| 387 | signal(SIGALRM, halt_signal); |
| 388 | signal(SIGHUP, halt_signal); |
| 389 | signal(SIGUSR2, reboot_signal); |
| 390 | signal(SIGINT, reboot_signal); |
| 391 | signal(SIGTERM, reboot_signal); |
| 392 | #endif |
| 393 | /* Figure out where the default console should be */ |
| 394 | console_init(); |
| 395 | |
| 396 | /* Turn off rebooting via CTL-ALT-DEL -- we get a |
| 397 | * SIGINT on CAD so we can shut things down gracefully... */ |
| 398 | #ifndef DEBUG_INIT |
| 399 | reboot(RB_DISABLE_CAD); |
| 400 | #endif |
| 401 | |
| 402 | /* Close whatever files are open, and reset the console. */ |
| 403 | close(0); |
| 404 | close(1); |
| 405 | close(2); |
| 406 | set_term(); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 407 | setsid(); |
| 408 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 409 | /* Make sure PATH is set to something sane */ |
| 410 | if (getenv("PATH") == NULL) |
| 411 | putenv(PATH_DEFAULT); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 412 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 413 | /* Hello world */ |
| 414 | message(console, "%s started: BusyBox v%s (%s) multi-call binary", |
| 415 | argv[0], BB_VER, BB_BT); |
| 416 | message(log, "%s started: BusyBox v%s (%s) multi-call binary", |
| 417 | argv[0], BB_VER, BB_BT); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 418 | |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 419 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 420 | /* Mount /proc */ |
| 421 | message(console, "Mounting /proc: \n"); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 422 | if (mount("/proc","/proc","proc",0,0)) { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 423 | message(log, "%s: could not mount /proc!\n", argv[0]); |
| 424 | message(console, "failed!\n"); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 425 | } |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 426 | message(console, "done.\n"); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 427 | |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 428 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 429 | /* Make sure there is enough memory to do something useful*/ |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 430 | set_free_pages(); |
Eric Andersen | 3c16382 | 1999-10-14 22:16:57 +0000 | [diff] [blame] | 431 | if (mem_total() < 2000) { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 432 | int retval; |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 433 | retval= stat("/etc/fstab",&statbuf); |
| 434 | if (retval) { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 435 | message(console, "%s", no_memory); |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 436 | while (1) { sleep(1);} |
| 437 | } else { |
| 438 | /* Try to turn on swap */ |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 439 | waitfor(run("/bin/swapon -a", console, 0)); |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 440 | if (mem_total() < 2000) { |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 441 | message(console, "%s", no_memory); |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 442 | while (1) { sleep(1);} |
| 443 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 444 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 445 | } |
| 446 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 447 | /* Check if we are supposed to be in single user mode */ |
| 448 | if (!strcmp(argv[1], "single") || !strcmp(argv[1], "-s") || !strcmp(argv[1], "1")) { |
| 449 | run_rc = FALSE; |
| 450 | tty0_commands = shell_commands; |
| 451 | tty1_commands = 0; |
| 452 | setproctitle("init [S]"); |
| 453 | } else { |
| 454 | setproctitle("init [1]"); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 455 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 456 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 457 | /* Make sure an init script exists before trying to run it */ |
| 458 | if ( run_rc == TRUE && stat( INITSCRIPT, &statbuf)) { |
| 459 | tty0_commands = shell_commands; |
| 460 | tty1_commands = shell_commands; |
| 461 | } |
| 462 | |
| 463 | /* Ok, now launch the rc script and/or prepare to |
| 464 | * start up some VTs if somebody hits enter... |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 465 | */ |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 466 | for ( ; ; ) { |
| 467 | int wpid; |
| 468 | int status; |
| 469 | |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 470 | if ( pid1 == 0 && *tty0_commands ) { |
| 471 | pid1 = run(tty0_commands, console, 1); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 472 | } |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 473 | if ( pid2 == 0 && *tty1_commands ) { |
| 474 | pid2 = run(tty1_commands, second_terminal, 1); |
Eric Andersen | 3c16382 | 1999-10-14 22:16:57 +0000 | [diff] [blame] | 475 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 476 | wpid = wait(&status); |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 477 | if ( wpid > 0 && wpid != pid1) { |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 478 | message(log, "pid %d exited, status=%x.\n", wpid, status); |
| 479 | } |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 480 | if ( wpid == pid2 ) { |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 481 | pid2 = 0; |
Eric Andersen | abc7d59 | 1999-10-19 00:27:50 +0000 | [diff] [blame] | 482 | } |
Eric Andersen | 0460ff2 | 1999-10-25 23:32:44 +0000 | [diff] [blame^] | 483 | sleep(1); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 484 | } |
| 485 | } |
| 486 | |