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authorErik Andersen <andersen@codepoet.org>2000-02-09 04:16:43 +0000
committerErik Andersen <andersen@codepoet.org>2000-02-09 04:16:43 +0000
commite132f4b09e5c9aedaef97f65279e8702633fd425 (patch)
tree50bfe1c027ff760e426ae31442da73e536dd4baa /init.c
parente49d5ecbbe51718fa925b6890a735e5937cc2aa2 (diff)
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Fixed the init problem where it wouldn't unmount filesystems
on reboot. Also fixed swapoff -a so it works. -Erik
Diffstat (limited to 'init.c')
-rw-r--r--init.c126
1 files changed, 84 insertions, 42 deletions
diff --git a/init.c b/init.c
index 899dca48c..2f2203b38 100644
--- a/init.c
+++ b/init.c
@@ -22,6 +22,11 @@
22 * 22 *
23 */ 23 */
24 24
25/* Turn this on to disable all the dangerous
26 rebooting stuff when debugging.
27#define DEBUG_INIT
28*/
29
25#include "internal.h" 30#include "internal.h"
26#include <stdio.h> 31#include <stdio.h>
27#include <string.h> 32#include <string.h>
@@ -78,7 +83,8 @@ typedef enum {
78 RESPAWN, 83 RESPAWN,
79 ASKFIRST, 84 ASKFIRST,
80 WAIT, 85 WAIT,
81 ONCE 86 ONCE,
87 CTRLALTDEL
82} initActionEnum; 88} initActionEnum;
83 89
84/* And now a list of the actions we support in the version of init */ 90/* And now a list of the actions we support in the version of init */
@@ -93,6 +99,7 @@ static const struct initActionType actions[] = {
93 {"askfirst", ASKFIRST}, 99 {"askfirst", ASKFIRST},
94 {"wait", WAIT}, 100 {"wait", WAIT},
95 {"once", ONCE}, 101 {"once", ONCE},
102 {"ctrlaltdel", CTRLALTDEL},
96 {0} 103 {0}
97}; 104};
98 105
@@ -113,6 +120,7 @@ static char *log = VT_LOG;
113static int kernelVersion = 0; 120static int kernelVersion = 0;
114static char termType[32] = "TERM=ansi"; 121static char termType[32] = "TERM=ansi";
115static char console[32] = _PATH_CONSOLE; 122static char console[32] = _PATH_CONSOLE;
123static void delete_initAction(initAction * action);
116 124
117 125
118/* print a message to the specified device: 126/* print a message to the specified device:
@@ -131,8 +139,8 @@ void message(int device, char *fmt, ...)
131 va_start(arguments, fmt); 139 va_start(arguments, fmt);
132 vsnprintf(msg, sizeof(msg), fmt, arguments); 140 vsnprintf(msg, sizeof(msg), fmt, arguments);
133 va_end(arguments); 141 va_end(arguments);
134 openlog("init", 0, LOG_DAEMON); 142 openlog("init", 0, LOG_USER);
135 syslog(LOG_DAEMON | LOG_NOTICE, msg); 143 syslog(LOG_USER|LOG_INFO, msg);
136 closelog(); 144 closelog();
137 } 145 }
138#else 146#else
@@ -146,11 +154,12 @@ void message(int device, char *fmt, ...)
146 log_fd = -2; 154 log_fd = -2;
147 /* log to main console instead */ 155 /* log to main console instead */
148 device = CONSOLE; 156 device = CONSOLE;
149 } else if ((log_fd = device_open(log, O_RDWR | O_NDELAY)) < 0) { 157 } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) {
150 log_fd = -1; 158 log_fd = -2;
151 fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log); 159 fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log);
152 fflush(stderr); 160 fflush(stderr);
153 return; 161 log = NULL;
162 device = CONSOLE;
154 } 163 }
155 } 164 }
156 if ((device & LOG) && (log_fd >= 0)) { 165 if ((device & LOG) && (log_fd >= 0)) {
@@ -303,10 +312,10 @@ static void console_init()
303 /* check for serial console and disable logging to tty3 & running a 312 /* check for serial console and disable logging to tty3 & running a
304 * shell to tty2 */ 313 * shell to tty2 */
305 if (ioctl(0, TIOCGSERIAL, &sr) == 0) { 314 if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
306 message(LOG | CONSOLE,
307 "serial console detected. Disabling virtual terminals.\r\n");
308 log = NULL; 315 log = NULL;
309 secondConsole = NULL; 316 secondConsole = NULL;
317 message(LOG | CONSOLE,
318 "serial console detected. Disabling virtual terminals.\r\n");
310 } 319 }
311 close(fd); 320 close(fd);
312 } 321 }
@@ -319,6 +328,7 @@ static pid_t run(char *command, char *terminal, int get_enter)
319 pid_t pid; 328 pid_t pid;
320 char *tmpCmd; 329 char *tmpCmd;
321 char *cmd[255]; 330 char *cmd[255];
331 char buf[255];
322 static const char press_enter[] = 332 static const char press_enter[] =
323 333
324 "\nPlease press Enter to activate this console. "; 334 "\nPlease press Enter to activate this console. ";
@@ -333,7 +343,9 @@ static pid_t run(char *command, char *terminal, int get_enter)
333 343
334 344
335 if ((pid = fork()) == 0) { 345 if ((pid = fork()) == 0) {
346#ifdef DEBUG_INIT
336 pid_t shell_pgid = getpid(); 347 pid_t shell_pgid = getpid();
348#endif
337 349
338 /* Clean up */ 350 /* Clean up */
339 close(0); 351 close(0);
@@ -369,30 +381,40 @@ static pid_t run(char *command, char *terminal, int get_enter)
369 */ 381 */
370 char c; 382 char c;
371 383
384#ifdef DEBUG_INIT
372 message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n", 385 message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
373 command, shell_pgid, terminal); 386 command, shell_pgid, terminal);
387#endif
374 write(fileno(stdout), press_enter, sizeof(press_enter) - 1); 388 write(fileno(stdout), press_enter, sizeof(press_enter) - 1);
375 read(fileno(stdin), &c, 1); 389 read(fileno(stdin), &c, 1);
376 } 390 }
377 391
392#ifdef DEBUG_INIT
378 /* Log the process name and args */ 393 /* Log the process name and args */
379 message(LOG, "Starting pid %d, console %s: '", 394 message(LOG, "Starting pid %d, console %s: '%s'\r\n",
380 shell_pgid, terminal, command); 395 shell_pgid, terminal, command);
381
382 /* Convert command (char*) into cmd (char**, one word per string) */
383 for (tmpCmd = command, i = 0;
384 (tmpCmd = strsep(&command, " \t")) != NULL;) {
385 if (*tmpCmd != '\0') {
386 cmd[i] = tmpCmd;
387#ifdef DEBUG_INIT
388 message(LOG, "%s ", tmpCmd);
389#endif 396#endif
390 tmpCmd++; 397
391 i++; 398 /* See if any special /bin/sh requiring characters are present */
399 if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
400 cmd[0] = SHELL;
401 cmd[1] = "-c";
402 strcpy(buf, "exec ");
403 strncat(buf, command, sizeof(buf) - strlen(buf) - 1);
404 cmd[2] = buf;
405 cmd[3] = NULL;
406 } else {
407 /* Convert command (char*) into cmd (char**, one word per string) */
408 for (tmpCmd = command, i = 0;
409 (tmpCmd = strsep(&command, " \t")) != NULL;) {
410 if (*tmpCmd != '\0') {
411 cmd[i] = tmpCmd;
412 tmpCmd++;
413 i++;
414 }
392 } 415 }
416 cmd[i] = NULL;
393 } 417 }
394 cmd[i] = NULL;
395 message(LOG, "'\r\n");
396 418
397 /* Now run it. The new program will take over this PID, 419 /* Now run it. The new program will take over this PID,
398 * so nothing further in init.c should be run. */ 420 * so nothing further in init.c should be run. */
@@ -413,9 +435,8 @@ static int waitfor(char *command, char *terminal, int get_enter)
413 435
414 while (1) { 436 while (1) {
415 wpid = wait(&status); 437 wpid = wait(&status);
416 if (wpid > 0) { 438 if (wpid > 0 && wpid != pid) {
417 message(LOG, "Process '%s' (pid %d) exited.\n", command, wpid); 439 continue;
418 break;
419 } 440 }
420 if (wpid == pid) 441 if (wpid == pid)
421 break; 442 break;
@@ -424,7 +445,7 @@ static int waitfor(char *command, char *terminal, int get_enter)
424} 445}
425 446
426/* Make sure there is enough memory to do something useful. * 447/* Make sure there is enough memory to do something useful. *
427 * Calls swapon if needed so be sure /proc is mounted. */ 448 * Calls "swapon -a" if needed so be sure /etc/fstab is present... */
428static void check_memory() 449static void check_memory()
429{ 450{
430 struct stat statBuf; 451 struct stat statBuf;
@@ -434,7 +455,7 @@ static void check_memory()
434 455
435 if (stat("/etc/fstab", &statBuf) == 0) { 456 if (stat("/etc/fstab", &statBuf) == 0) {
436 /* Try to turn on swap */ 457 /* Try to turn on swap */
437 waitfor("/bin/swapon swapon -a", log, FALSE); 458 system("/sbin/swapon swapon -a");
438 if (mem_total() < 3500) 459 if (mem_total() < 3500)
439 goto goodnight; 460 goto goodnight;
440 } else 461 } else
@@ -448,31 +469,45 @@ static void check_memory()
448 sleep(1); 469 sleep(1);
449} 470}
450 471
472/* Run all commands to be run right before halt/reboot */
473static void run_lastAction(void)
474{
475 initAction *a;
476 for (a = initActionList; a; a = a->nextPtr) {
477 if (a->action == CTRLALTDEL) {
478 waitfor(a->process, a->console, FALSE);
479 delete_initAction(a);
480 }
481 }
482}
483
484
451#ifndef DEBUG_INIT 485#ifndef DEBUG_INIT
452static void shutdown_system(void) 486static void shutdown_system(void)
453{ 487{
488
454 /* first disable our SIGHUP signal */ 489 /* first disable our SIGHUP signal */
455 signal(SIGHUP, SIG_DFL); 490 signal(SIGHUP, SIG_DFL);
456 491
457 /* Allow Ctrl-Alt-Del to reboot system. */ 492 /* Allow Ctrl-Alt-Del to reboot system. */
458 reboot(RB_ENABLE_CAD); 493 reboot(RB_ENABLE_CAD);
459 message(CONSOLE, "\r\nThe system is going down NOW !!\r\n"); 494
495 message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n");
460 sync(); 496 sync();
461 497
462 /* Send signals to every process _except_ pid 1 */ 498 /* Send signals to every process _except_ pid 1 */
463 message(CONSOLE, "Sending SIGTERM to all processes.\r\n"); 499 message(CONSOLE|LOG, "Sending SIGTERM to all processes.\r\n");
464 kill(-1, SIGTERM); 500 kill(-1, SIGTERM);
465 sleep(5); 501 sleep(1);
466 sync(); 502 sync();
467 503
468 message(CONSOLE, "Sending SIGKILL to all processes.\r\n"); 504 message(CONSOLE|LOG, "Sending SIGKILL to all processes.\r\n");
469 kill(-1, SIGKILL); 505 kill(-1, SIGKILL);
470 sleep(5); 506 sleep(1);
507
508 /* run everything to be run at "ctrlaltdel" */
509 run_lastAction();
471 510
472 message(CONSOLE, "Disabling swap.\r\n");
473 waitfor("swapoff -a", console, FALSE);
474 message(CONSOLE, "Unmounting filesystems.\r\n");
475 waitfor("umount -a -r", console, FALSE);
476 sync(); 511 sync();
477 if (kernelVersion > 0 && kernelVersion <= 2 * 65536 + 2 * 256 + 11) { 512 if (kernelVersion > 0 && kernelVersion <= 2 * 65536 + 2 * 256 + 11) {
478 /* bdflush, kupdate not needed for kernels >2.2.11 */ 513 /* bdflush, kupdate not needed for kernels >2.2.11 */
@@ -484,14 +519,14 @@ static void shutdown_system(void)
484static void halt_signal(int sig) 519static void halt_signal(int sig)
485{ 520{
486 shutdown_system(); 521 shutdown_system();
487 message(CONSOLE, 522 message(CONSOLE|LOG,
488 "The system is halted. Press %s or turn off power\r\n", 523 "The system is halted. Press %s or turn off power\r\n",
489 (secondConsole == NULL) /* serial console */ 524 (secondConsole == NULL) /* serial console */
490 ? "Reset" : "CTRL-ALT-DEL"); 525 ? "Reset" : "CTRL-ALT-DEL");
491 sync(); 526 sync();
492 527
493 /* allow time for last message to reach serial console */ 528 /* allow time for last message to reach serial console */
494 sleep(5); 529 sleep(2);
495 530
496#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0) 531#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
497 if (sig == SIGUSR2) 532 if (sig == SIGUSR2)
@@ -505,7 +540,7 @@ static void halt_signal(int sig)
505static void reboot_signal(int sig) 540static void reboot_signal(int sig)
506{ 541{
507 shutdown_system(); 542 shutdown_system();
508 message(CONSOLE, "Please stand by while rebooting the system.\r\n"); 543 message(CONSOLE|LOG, "Please stand by while rebooting the system.\r\n");
509 sync(); 544 sync();
510 545
511 /* allow time for last message to reach serial console */ 546 /* allow time for last message to reach serial console */
@@ -631,7 +666,7 @@ void new_initAction(initActionEnum action, char *process, char *cons)
631// newAction->process, newAction->action, newAction->console); 666// newAction->process, newAction->action, newAction->console);
632} 667}
633 668
634void delete_initAction(initAction * action) 669static void delete_initAction(initAction * action)
635{ 670{
636 initAction *a, *b = NULL; 671 initAction *a, *b = NULL;
637 672
@@ -669,6 +704,10 @@ void parse_inittab(void)
669 if (file == NULL) { 704 if (file == NULL) {
670 /* No inittab file -- set up some default behavior */ 705 /* No inittab file -- set up some default behavior */
671#endif 706#endif
707 /* Swapoff on halt/reboot */
708 new_initAction(CTRLALTDEL, "/bin/umount -a -r > /dev/null 2>&1", console);
709 /* Umount all filesystems on halt/reboot */
710 new_initAction(CTRLALTDEL, "/bin/umount -a -r > /dev/null 2>&1", console);
672 /* Askfirst shell on tty1 */ 711 /* Askfirst shell on tty1 */
673 new_initAction(ASKFIRST, SHELL, console); 712 new_initAction(ASKFIRST, SHELL, console);
674 /* Askfirst shell on tty2 */ 713 /* Askfirst shell on tty2 */
@@ -756,6 +795,8 @@ void parse_inittab(void)
756#endif 795#endif
757} 796}
758 797
798
799
759extern int init_main(int argc, char **argv) 800extern int init_main(int argc, char **argv)
760{ 801{
761 initAction *a; 802 initAction *a;
@@ -768,9 +809,6 @@ extern int init_main(int argc, char **argv)
768 usage("init\n\nInit is the parent of all processes.\n\n" 809 usage("init\n\nInit is the parent of all processes.\n\n"
769 "This version of init is designed to be run only by the kernel\n"); 810 "This version of init is designed to be run only by the kernel\n");
770 } 811 }
771 /* Fix up argv[0] to be certain we claim to be init */
772 strncpy(argv[0], "init", strlen(argv[0]));
773
774 /* Set up sig handlers -- be sure to 812 /* Set up sig handlers -- be sure to
775 * clear all of these in run() */ 813 * clear all of these in run() */
776 signal(SIGUSR1, halt_signal); 814 signal(SIGUSR1, halt_signal);
@@ -838,6 +876,10 @@ extern int init_main(int argc, char **argv)
838 * of "askfirst" shells */ 876 * of "askfirst" shells */
839 parse_inittab(); 877 parse_inittab();
840 } 878 }
879
880 /* Fix up argv[0] to be certain we claim to be init */
881 strncpy(argv[0], "init", strlen(argv[0])+1);
882 strncpy(argv[1], "\0", strlen(argv[1])+1);
841 883
842 /* Now run everything that needs to be run */ 884 /* Now run everything that needs to be run */
843 885
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