on reboot. Also fixed swapoff -a so it works.
-Erik
- `fdflush', `length' and `printf' crashed when run without arguments
- `fdflush' tried to flush itself using *argv
- added "skip" and "seek" to dd.
+ * swapoff -a was not working. Now it is.
+ * init did not cleanly unmount filesystems on reboot. Now it does.
-Erik Andersen
# -D_GNU_SOURCE is needed because environ is used in init.c
ifeq ($(DODEBUG),true)
- CFLAGS += -Wall -g -D_GNU_SOURCE -DDEBUG_INIT
+ CFLAGS += -Wall -g -D_GNU_SOURCE
STRIP =
LDFLAGS =
else
#define BB_MOUNT
#define BB_NFSMOUNT
//#define BB_MT
-//#define BB_MTAB
#define BB_NSLOOKUP
#define BB_PING
#define BB_POWEROFF
*
*/
+/* Turn this on to disable all the dangerous
+ rebooting stuff when debugging.
+#define DEBUG_INIT
+*/
+
#include "internal.h"
#include <stdio.h>
#include <string.h>
RESPAWN,
ASKFIRST,
WAIT,
- ONCE
+ ONCE,
+ CTRLALTDEL
} initActionEnum;
/* And now a list of the actions we support in the version of init */
{"askfirst", ASKFIRST},
{"wait", WAIT},
{"once", ONCE},
+ {"ctrlaltdel", CTRLALTDEL},
{0}
};
static int kernelVersion = 0;
static char termType[32] = "TERM=ansi";
static char console[32] = _PATH_CONSOLE;
+static void delete_initAction(initAction * action);
/* print a message to the specified device:
va_start(arguments, fmt);
vsnprintf(msg, sizeof(msg), fmt, arguments);
va_end(arguments);
- openlog("init", 0, LOG_DAEMON);
- syslog(LOG_DAEMON | LOG_NOTICE, msg);
+ openlog("init", 0, LOG_USER);
+ syslog(LOG_USER|LOG_INFO, msg);
closelog();
}
#else
log_fd = -2;
/* log to main console instead */
device = CONSOLE;
- } else if ((log_fd = device_open(log, O_RDWR | O_NDELAY)) < 0) {
- log_fd = -1;
+ } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) {
+ log_fd = -2;
fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log);
fflush(stderr);
- return;
+ log = NULL;
+ device = CONSOLE;
}
}
if ((device & LOG) && (log_fd >= 0)) {
/* check for serial console and disable logging to tty3 & running a
* shell to tty2 */
if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
- message(LOG | CONSOLE,
- "serial console detected. Disabling virtual terminals.\r\n");
log = NULL;
secondConsole = NULL;
+ message(LOG | CONSOLE,
+ "serial console detected. Disabling virtual terminals.\r\n");
}
close(fd);
}
pid_t pid;
char *tmpCmd;
char *cmd[255];
+ char buf[255];
static const char press_enter[] =
"\nPlease press Enter to activate this console. ";
if ((pid = fork()) == 0) {
+#ifdef DEBUG_INIT
pid_t shell_pgid = getpid();
+#endif
/* Clean up */
close(0);
*/
char c;
+#ifdef DEBUG_INIT
message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
command, shell_pgid, terminal);
+#endif
write(fileno(stdout), press_enter, sizeof(press_enter) - 1);
read(fileno(stdin), &c, 1);
}
+#ifdef DEBUG_INIT
/* Log the process name and args */
- message(LOG, "Starting pid %d, console %s: '",
+ message(LOG, "Starting pid %d, console %s: '%s'\r\n",
shell_pgid, terminal, command);
-
- /* Convert command (char*) into cmd (char**, one word per string) */
- for (tmpCmd = command, i = 0;
- (tmpCmd = strsep(&command, " \t")) != NULL;) {
- if (*tmpCmd != '\0') {
- cmd[i] = tmpCmd;
-#ifdef DEBUG_INIT
- message(LOG, "%s ", tmpCmd);
#endif
- tmpCmd++;
- i++;
+
+ /* See if any special /bin/sh requiring characters are present */
+ if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
+ cmd[0] = SHELL;
+ cmd[1] = "-c";
+ strcpy(buf, "exec ");
+ strncat(buf, command, sizeof(buf) - strlen(buf) - 1);
+ cmd[2] = buf;
+ cmd[3] = NULL;
+ } else {
+ /* Convert command (char*) into cmd (char**, one word per string) */
+ for (tmpCmd = command, i = 0;
+ (tmpCmd = strsep(&command, " \t")) != NULL;) {
+ if (*tmpCmd != '\0') {
+ cmd[i] = tmpCmd;
+ tmpCmd++;
+ i++;
+ }
}
+ cmd[i] = NULL;
}
- cmd[i] = NULL;
- message(LOG, "'\r\n");
/* Now run it. The new program will take over this PID,
* so nothing further in init.c should be run. */
while (1) {
wpid = wait(&status);
- if (wpid > 0) {
- message(LOG, "Process '%s' (pid %d) exited.\n", command, wpid);
- break;
+ if (wpid > 0 && wpid != pid) {
+ continue;
}
if (wpid == pid)
break;
}
/* Make sure there is enough memory to do something useful. *
- * Calls swapon if needed so be sure /proc is mounted. */
+ * Calls "swapon -a" if needed so be sure /etc/fstab is present... */
static void check_memory()
{
struct stat statBuf;
if (stat("/etc/fstab", &statBuf) == 0) {
/* Try to turn on swap */
- waitfor("/bin/swapon swapon -a", log, FALSE);
+ system("/sbin/swapon swapon -a");
if (mem_total() < 3500)
goto goodnight;
} else
sleep(1);
}
+/* Run all commands to be run right before halt/reboot */
+static void run_lastAction(void)
+{
+ initAction *a;
+ for (a = initActionList; a; a = a->nextPtr) {
+ if (a->action == CTRLALTDEL) {
+ waitfor(a->process, a->console, FALSE);
+ delete_initAction(a);
+ }
+ }
+}
+
+
#ifndef DEBUG_INIT
static void shutdown_system(void)
{
+
/* first disable our SIGHUP signal */
signal(SIGHUP, SIG_DFL);
/* Allow Ctrl-Alt-Del to reboot system. */
reboot(RB_ENABLE_CAD);
- message(CONSOLE, "\r\nThe system is going down NOW !!\r\n");
+
+ message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n");
sync();
/* Send signals to every process _except_ pid 1 */
- message(CONSOLE, "Sending SIGTERM to all processes.\r\n");
+ message(CONSOLE|LOG, "Sending SIGTERM to all processes.\r\n");
kill(-1, SIGTERM);
- sleep(5);
+ sleep(1);
sync();
- message(CONSOLE, "Sending SIGKILL to all processes.\r\n");
+ message(CONSOLE|LOG, "Sending SIGKILL to all processes.\r\n");
kill(-1, SIGKILL);
- sleep(5);
+ sleep(1);
+
+ /* run everything to be run at "ctrlaltdel" */
+ run_lastAction();
- message(CONSOLE, "Disabling swap.\r\n");
- waitfor("swapoff -a", console, FALSE);
- message(CONSOLE, "Unmounting filesystems.\r\n");
- waitfor("umount -a -r", console, FALSE);
sync();
if (kernelVersion > 0 && kernelVersion <= 2 * 65536 + 2 * 256 + 11) {
/* bdflush, kupdate not needed for kernels >2.2.11 */
static void halt_signal(int sig)
{
shutdown_system();
- message(CONSOLE,
+ message(CONSOLE|LOG,
"The system is halted. Press %s or turn off power\r\n",
(secondConsole == NULL) /* serial console */
? "Reset" : "CTRL-ALT-DEL");
sync();
/* allow time for last message to reach serial console */
- sleep(5);
+ sleep(2);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
if (sig == SIGUSR2)
static void reboot_signal(int sig)
{
shutdown_system();
- message(CONSOLE, "Please stand by while rebooting the system.\r\n");
+ message(CONSOLE|LOG, "Please stand by while rebooting the system.\r\n");
sync();
/* allow time for last message to reach serial console */
// newAction->process, newAction->action, newAction->console);
}
-void delete_initAction(initAction * action)
+static void delete_initAction(initAction * action)
{
initAction *a, *b = NULL;
if (file == NULL) {
/* No inittab file -- set up some default behavior */
#endif
+ /* Swapoff on halt/reboot */
+ new_initAction(CTRLALTDEL, "/bin/umount -a -r > /dev/null 2>&1", console);
+ /* Umount all filesystems on halt/reboot */
+ new_initAction(CTRLALTDEL, "/bin/umount -a -r > /dev/null 2>&1", console);
/* Askfirst shell on tty1 */
new_initAction(ASKFIRST, SHELL, console);
/* Askfirst shell on tty2 */
#endif
}
+
+
extern int init_main(int argc, char **argv)
{
initAction *a;
usage("init\n\nInit is the parent of all processes.\n\n"
"This version of init is designed to be run only by the kernel\n");
}
- /* Fix up argv[0] to be certain we claim to be init */
- strncpy(argv[0], "init", strlen(argv[0]));
-
/* Set up sig handlers -- be sure to
* clear all of these in run() */
signal(SIGUSR1, halt_signal);
* of "askfirst" shells */
parse_inittab();
}
+
+ /* Fix up argv[0] to be certain we claim to be init */
+ strncpy(argv[0], "init", strlen(argv[0])+1);
+ strncpy(argv[1], "\0", strlen(argv[1])+1);
/* Now run everything that needs to be run */
*
*/
+/* Turn this on to disable all the dangerous
+ rebooting stuff when debugging.
+#define DEBUG_INIT
+*/
+
#include "internal.h"
#include <stdio.h>
#include <string.h>
RESPAWN,
ASKFIRST,
WAIT,
- ONCE
+ ONCE,
+ CTRLALTDEL
} initActionEnum;
/* And now a list of the actions we support in the version of init */
{"askfirst", ASKFIRST},
{"wait", WAIT},
{"once", ONCE},
+ {"ctrlaltdel", CTRLALTDEL},
{0}
};
static int kernelVersion = 0;
static char termType[32] = "TERM=ansi";
static char console[32] = _PATH_CONSOLE;
+static void delete_initAction(initAction * action);
/* print a message to the specified device:
va_start(arguments, fmt);
vsnprintf(msg, sizeof(msg), fmt, arguments);
va_end(arguments);
- openlog("init", 0, LOG_DAEMON);
- syslog(LOG_DAEMON | LOG_NOTICE, msg);
+ openlog("init", 0, LOG_USER);
+ syslog(LOG_USER|LOG_INFO, msg);
closelog();
}
#else
log_fd = -2;
/* log to main console instead */
device = CONSOLE;
- } else if ((log_fd = device_open(log, O_RDWR | O_NDELAY)) < 0) {
- log_fd = -1;
+ } else if ((log_fd = device_open(log, O_RDWR|O_NDELAY)) < 0) {
+ log_fd = -2;
fprintf(stderr, "Bummer, can't write to log on %s!\r\n", log);
fflush(stderr);
- return;
+ log = NULL;
+ device = CONSOLE;
}
}
if ((device & LOG) && (log_fd >= 0)) {
/* check for serial console and disable logging to tty3 & running a
* shell to tty2 */
if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
- message(LOG | CONSOLE,
- "serial console detected. Disabling virtual terminals.\r\n");
log = NULL;
secondConsole = NULL;
+ message(LOG | CONSOLE,
+ "serial console detected. Disabling virtual terminals.\r\n");
}
close(fd);
}
pid_t pid;
char *tmpCmd;
char *cmd[255];
+ char buf[255];
static const char press_enter[] =
"\nPlease press Enter to activate this console. ";
if ((pid = fork()) == 0) {
+#ifdef DEBUG_INIT
pid_t shell_pgid = getpid();
+#endif
/* Clean up */
close(0);
*/
char c;
+#ifdef DEBUG_INIT
message(LOG, "Waiting for enter to start '%s' (pid %d, console %s)\r\n",
command, shell_pgid, terminal);
+#endif
write(fileno(stdout), press_enter, sizeof(press_enter) - 1);
read(fileno(stdin), &c, 1);
}
+#ifdef DEBUG_INIT
/* Log the process name and args */
- message(LOG, "Starting pid %d, console %s: '",
+ message(LOG, "Starting pid %d, console %s: '%s'\r\n",
shell_pgid, terminal, command);
-
- /* Convert command (char*) into cmd (char**, one word per string) */
- for (tmpCmd = command, i = 0;
- (tmpCmd = strsep(&command, " \t")) != NULL;) {
- if (*tmpCmd != '\0') {
- cmd[i] = tmpCmd;
-#ifdef DEBUG_INIT
- message(LOG, "%s ", tmpCmd);
#endif
- tmpCmd++;
- i++;
+
+ /* See if any special /bin/sh requiring characters are present */
+ if (strpbrk(command, "~`!$^&*()=|\\{}[];\"'<>?") != NULL) {
+ cmd[0] = SHELL;
+ cmd[1] = "-c";
+ strcpy(buf, "exec ");
+ strncat(buf, command, sizeof(buf) - strlen(buf) - 1);
+ cmd[2] = buf;
+ cmd[3] = NULL;
+ } else {
+ /* Convert command (char*) into cmd (char**, one word per string) */
+ for (tmpCmd = command, i = 0;
+ (tmpCmd = strsep(&command, " \t")) != NULL;) {
+ if (*tmpCmd != '\0') {
+ cmd[i] = tmpCmd;
+ tmpCmd++;
+ i++;
+ }
}
+ cmd[i] = NULL;
}
- cmd[i] = NULL;
- message(LOG, "'\r\n");
/* Now run it. The new program will take over this PID,
* so nothing further in init.c should be run. */
while (1) {
wpid = wait(&status);
- if (wpid > 0) {
- message(LOG, "Process '%s' (pid %d) exited.\n", command, wpid);
- break;
+ if (wpid > 0 && wpid != pid) {
+ continue;
}
if (wpid == pid)
break;
}
/* Make sure there is enough memory to do something useful. *
- * Calls swapon if needed so be sure /proc is mounted. */
+ * Calls "swapon -a" if needed so be sure /etc/fstab is present... */
static void check_memory()
{
struct stat statBuf;
if (stat("/etc/fstab", &statBuf) == 0) {
/* Try to turn on swap */
- waitfor("/bin/swapon swapon -a", log, FALSE);
+ system("/sbin/swapon swapon -a");
if (mem_total() < 3500)
goto goodnight;
} else
sleep(1);
}
+/* Run all commands to be run right before halt/reboot */
+static void run_lastAction(void)
+{
+ initAction *a;
+ for (a = initActionList; a; a = a->nextPtr) {
+ if (a->action == CTRLALTDEL) {
+ waitfor(a->process, a->console, FALSE);
+ delete_initAction(a);
+ }
+ }
+}
+
+
#ifndef DEBUG_INIT
static void shutdown_system(void)
{
+
/* first disable our SIGHUP signal */
signal(SIGHUP, SIG_DFL);
/* Allow Ctrl-Alt-Del to reboot system. */
reboot(RB_ENABLE_CAD);
- message(CONSOLE, "\r\nThe system is going down NOW !!\r\n");
+
+ message(CONSOLE|LOG, "\r\nThe system is going down NOW !!\r\n");
sync();
/* Send signals to every process _except_ pid 1 */
- message(CONSOLE, "Sending SIGTERM to all processes.\r\n");
+ message(CONSOLE|LOG, "Sending SIGTERM to all processes.\r\n");
kill(-1, SIGTERM);
- sleep(5);
+ sleep(1);
sync();
- message(CONSOLE, "Sending SIGKILL to all processes.\r\n");
+ message(CONSOLE|LOG, "Sending SIGKILL to all processes.\r\n");
kill(-1, SIGKILL);
- sleep(5);
+ sleep(1);
+
+ /* run everything to be run at "ctrlaltdel" */
+ run_lastAction();
- message(CONSOLE, "Disabling swap.\r\n");
- waitfor("swapoff -a", console, FALSE);
- message(CONSOLE, "Unmounting filesystems.\r\n");
- waitfor("umount -a -r", console, FALSE);
sync();
if (kernelVersion > 0 && kernelVersion <= 2 * 65536 + 2 * 256 + 11) {
/* bdflush, kupdate not needed for kernels >2.2.11 */
static void halt_signal(int sig)
{
shutdown_system();
- message(CONSOLE,
+ message(CONSOLE|LOG,
"The system is halted. Press %s or turn off power\r\n",
(secondConsole == NULL) /* serial console */
? "Reset" : "CTRL-ALT-DEL");
sync();
/* allow time for last message to reach serial console */
- sleep(5);
+ sleep(2);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
if (sig == SIGUSR2)
static void reboot_signal(int sig)
{
shutdown_system();
- message(CONSOLE, "Please stand by while rebooting the system.\r\n");
+ message(CONSOLE|LOG, "Please stand by while rebooting the system.\r\n");
sync();
/* allow time for last message to reach serial console */
// newAction->process, newAction->action, newAction->console);
}
-void delete_initAction(initAction * action)
+static void delete_initAction(initAction * action)
{
initAction *a, *b = NULL;
if (file == NULL) {
/* No inittab file -- set up some default behavior */
#endif
+ /* Swapoff on halt/reboot */
+ new_initAction(CTRLALTDEL, "/bin/umount -a -r > /dev/null 2>&1", console);
+ /* Umount all filesystems on halt/reboot */
+ new_initAction(CTRLALTDEL, "/bin/umount -a -r > /dev/null 2>&1", console);
/* Askfirst shell on tty1 */
new_initAction(ASKFIRST, SHELL, console);
/* Askfirst shell on tty2 */
#endif
}
+
+
extern int init_main(int argc, char **argv)
{
initAction *a;
usage("init\n\nInit is the parent of all processes.\n\n"
"This version of init is designed to be run only by the kernel\n");
}
- /* Fix up argv[0] to be certain we claim to be init */
- strncpy(argv[0], "init", strlen(argv[0]));
-
/* Set up sig handlers -- be sure to
* clear all of these in run() */
signal(SIGUSR1, halt_signal);
* of "askfirst" shells */
parse_inittab();
}
+
+ /* Fix up argv[0] to be certain we claim to be init */
+ strncpy(argv[0], "init", strlen(argv[0])+1);
+ strncpy(argv[1], "\0", strlen(argv[1])+1);
/* Now run everything that needs to be run */
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
+//#include <sys/param.h>
#include <mntent.h>
#if defined BB_INIT || defined BB_SYSLOGD
extern int device_open(char *device, int mode);
#endif
+extern void whine_if_fstab_is_missing();
#if defined BB_FEATURE_MOUNT_LOOP
extern int del_loop(const char *device);
#include <linux/loop.h>
-static int use_loop = 0;
+static int use_loop = FALSE;
#endif
extern const char mtab_file[]; /* Defined in utility.c */
char *mtab_opts)
{
int status = 0;
+ char *lofile = NULL;
#if defined BB_MTAB
if (fakeIt == FALSE)
#endif
{
#if defined BB_FEATURE_MOUNT_LOOP
- if (use_loop) {
+ if (use_loop==TRUE) {
int loro = flags & MS_RDONLY;
char *lofile = specialfile;
fprintf(stderr, "WARNING: loop device is read-only\n");
flags &= ~MS_RDONLY;
}
+ use_loop = FALSE;
}
#endif
status =
/* Bummer. mount failed. Clean up */
#if defined BB_FEATURE_MOUNT_LOOP
- if (specialfile != NULL) {
+ if (lofile != NULL) {
del_loop(specialfile);
}
#endif
-#if defined BB_MTAB
-#define whine_if_fstab_is_missing() {}
-#else
-extern void whine_if_fstab_is_missing()
-{
- struct stat statBuf;
-
- if (stat("/etc/fstab", &statBuf) < 0)
- fprintf(stderr,
- "/etc/fstab file missing -- install one to name /dev/root.\n\n");
-}
-#endif
-
-
/* Seperate standard mount options from the nonstandard string options */
static void
parse_mount_options(char *options, unsigned long *flags, char *strflags)
}
#if defined BB_FEATURE_MOUNT_LOOP
if (gotone == FALSE && !strcasecmp("loop", options)) { /* loop device support */
- use_loop = 1;
+ use_loop = TRUE;
gotone = TRUE;
}
#endif
int
mount_one(char *blockDevice, char *directory, char *filesystemType,
unsigned long flags, char *string_flags, int useMtab, int fakeIt,
- char *mtab_opts)
+ char *mtab_opts, int whineOnErrors)
{
int status = 0;
fakeIt, mtab_opts);
}
- if (status == FALSE) {
- fprintf(stderr, "Mounting %s on %s failed: %s\n",
- blockDevice, directory, strerror(errno));
+ if (status == FALSE && whineOnErrors == TRUE) {
+ if (whineOnErrors == TRUE) {
+ fprintf(stderr, "Mounting %s on %s failed: %s\n",
+ blockDevice, directory, strerror(errno));
+ }
return (FALSE);
}
return (TRUE);
exit(FALSE);
}
while ((m = getmntent(f)) != NULL) {
- // If the file system isn't noauto, and isn't mounted on /,
+ // If the file system isn't noauto,
// and isn't swap or nfs, then mount it
if ((!strstr(m->mnt_opts, "noauto")) &&
- (m->mnt_dir[1] != '\0') &&
(!strstr(m->mnt_type, "swap")) &&
(!strstr(m->mnt_type, "nfs"))) {
flags = 0;
*string_flags = '\0';
parse_mount_options(m->mnt_opts, &flags, string_flags);
- mount_one(m->mnt_fsname, m->mnt_dir, m->mnt_type,
+ /* If the directory is /, try to remount
+ * with the options specified in fstab */
+ if (m->mnt_dir[0] == '/' && m->mnt_dir[1] == '\0') {
+ flags |= MS_REMOUNT;
+ }
+ if (mount_one(m->mnt_fsname, m->mnt_dir, m->mnt_type,
flags, string_flags, useMtab, fakeIt,
- extra_opts);
+ extra_opts, FALSE))
+ {
+ /* Try again, but this time try a remount */
+ mount_one(m->mnt_fsname, m->mnt_dir, m->mnt_type,
+ flags|MS_REMOUNT, string_flags, useMtab, fakeIt,
+ extra_opts, TRUE);
+ }
}
}
endmntent(f);
#endif
exit(mount_one(device, directory, filesystemType,
flags, string_flags, useMtab, fakeIt,
- extra_opts));
+ extra_opts, TRUE));
} else {
goto goodbye;
}
static const char *appName;
static const char swapoff_usage[] =
+ "swapoff [OPTION] [device]\n\n"
+ "Stop swapping virtual memory pages on the given device.\n\n"
+ "Options:\n"
+ "\t-a\tStop swapping on all swap devices\n";
- "swapoff device\n"
- "\nStop swapping virtual memory pages on the given device.\n";
static const char swapon_usage[] =
-
- "swapon device\n"
- "\nStart swapping virtual memory pages on the given device.\n";
+ "swapon [OPTION] [device]\n\n"
+ "Start swapping virtual memory pages on the given device.\n\n"
+ "Options:\n"
+ "\t-a\tStart swapping on all swap devices\n";
#define SWAPON_APP 1
extern int swap_on_off_main(int argc, char **argv)
{
- struct stat statBuf;
-
- if (stat("/etc/fstab", &statBuf) < 0)
- fprintf(stderr,
- "/etc/fstab file missing -- Please install one.\n\n");
-
if (strcmp(*argv, "swapon") == 0) {
appName = *argv;
whichApp = SWAPON_APP;
whichApp = SWAPOFF_APP;
}
- if (argc < 2)
+ if (argc != 2) {
goto usage_and_exit;
+ }
argc--;
argv++;
while (*++(*argv))
switch (**argv) {
case 'a':
+ whine_if_fstab_is_missing();
do_em_all();
break;
default:
#include <fstab.h>
#include <errno.h>
+
static const char umount_usage[] =
"umount [flags] filesystem|directory\n\n"
"Flags:\n" "\t-a:\tUnmount all file systems"
static int doRemount = FALSE;
extern const char mtab_file[]; /* Defined in utility.c */
-#define MIN(x,y) (x > y ? x : y)
+
+/* These functions are here because the getmntent functions do not appear
+ * to be re-entrant, which leads to all sorts of problems when we try to
+ * use them recursively - randolph
+ */
+void mtab_read(void)
+{
+ struct _mtab_entry_t *entry = NULL;
+ struct mntent *e;
+ FILE *fp;
+
+ if (mtab_cache != NULL)
+ return;
+
+ if ((fp = setmntent(mtab_file, "r")) == NULL) {
+ fprintf(stderr, "Cannot open %s\n", mtab_file);
+ return;
+ }
+ while ((e = getmntent(fp))) {
+ entry = malloc(sizeof(struct _mtab_entry_t));
+
+ entry->device = strdup(e->mnt_fsname);
+ entry->mountpt = strdup(e->mnt_dir);
+ entry->next = mtab_cache;
+ mtab_cache = entry;
+ }
+ endmntent(fp);
+}
+
+char *mtab_getinfo(const char *match, const char which)
+{
+ struct _mtab_entry_t *cur = mtab_cache;
+
+ while (cur) {
+ if (strcmp(cur->mountpt, match) == 0 ||
+ strcmp(cur->device, match) == 0) {
+ if (which == MTAB_GETMOUNTPT) {
+ return cur->mountpt;
+ } else {
+#if !defined BB_MTAB
+ if (strcmp(cur->device, "/dev/root") == 0) {
+ struct fstab *fstabItem;
+
+ fstabItem = getfsfile("/");
+ if (fstabItem != NULL)
+ return fstabItem->fs_spec;
+ }
+#endif
+ return cur->device;
+ }
+ }
+ cur = cur->next;
+ }
+ return NULL;
+}
+
+char *mtab_first(void **iter)
+{
+ struct _mtab_entry_t *mtab_iter;
+
+ if (!iter)
+ return NULL;
+ mtab_iter = mtab_cache;
+ *iter = (void *) mtab_iter;
+ return mtab_next(iter);
+}
+
+char *mtab_next(void **iter)
+{
+ char *mp;
+
+ if (iter == NULL || *iter == NULL)
+ return NULL;
+ mp = ((struct _mtab_entry_t *) (*iter))->mountpt;
+ *iter = (void *) ((struct _mtab_entry_t *) (*iter))->next;
+ return mp;
+}
+
+void mtab_free(void)
+{
+ struct _mtab_entry_t *this, *next;
+
+ this = mtab_cache;
+ while (this) {
+ next = this->next;
+ if (this->device)
+ free(this->device);
+ if (this->mountpt)
+ free(this->mountpt);
+ free(this);
+ this = next;
+ }
+}
static int do_umount(const char *name, int useMtab)
{
void *iter;
for (mountpt = mtab_first(&iter); mountpt; mountpt = mtab_next(&iter)) {
+ /* Never umount /proc on a umount -a */
+ if (strstr(mountpt, "proc")!= NULL)
+ continue;
status = do_umount(mountpt, useMtab);
if (status != 0) {
/* Don't bother retrying the umount on busy devices */
}
}
-
-
-/* These functions are here because the getmntent functions do not appear
- * to be re-entrant, which leads to all sorts of problems when we try to
- * use them recursively - randolph
- */
-void mtab_read(void)
-{
- struct _mtab_entry_t *entry = NULL;
- struct mntent *e;
- FILE *fp;
-
- if (mtab_cache != NULL)
- return;
-
- if ((fp = setmntent(mtab_file, "r")) == NULL) {
- fprintf(stderr, "Cannot open %s\n", mtab_file);
- return;
- }
- while ((e = getmntent(fp))) {
- entry = malloc(sizeof(struct _mtab_entry_t));
-
- entry->device = strdup(e->mnt_fsname);
- entry->mountpt = strdup(e->mnt_dir);
- entry->next = mtab_cache;
- mtab_cache = entry;
- }
- endmntent(fp);
-}
-
-char *mtab_getinfo(const char *match, const char which)
-{
- struct _mtab_entry_t *cur = mtab_cache;
-
- while (cur) {
- if (strcmp(cur->mountpt, match) == 0 ||
- strcmp(cur->device, match) == 0) {
- if (which == MTAB_GETMOUNTPT) {
- return cur->mountpt;
- } else {
-#if !defined BB_MTAB
- if (strcmp(cur->device, "/dev/root") == 0) {
- struct fstab *fstabItem;
-
- fstabItem = getfsfile("/");
- if (fstabItem != NULL)
- return fstabItem->fs_spec;
- }
-#endif
- return cur->device;
- }
- }
- cur = cur->next;
- }
- return NULL;
-}
-
-char *mtab_first(void **iter)
-{
- struct _mtab_entry_t *mtab_iter;
-
- if (!iter)
- return NULL;
- mtab_iter = mtab_cache;
- *iter = (void *) mtab_iter;
- return mtab_next(iter);
-}
-
-char *mtab_next(void **iter)
-{
- char *mp;
-
- if (iter == NULL || *iter == NULL)
- return NULL;
- mp = ((struct _mtab_entry_t *) (*iter))->mountpt;
- *iter = (void *) ((struct _mtab_entry_t *) (*iter))->next;
- return mp;
-}
-
-void mtab_free(void)
-{
- struct _mtab_entry_t *this, *next;
-
- this = mtab_cache;
- while (this) {
- next = this->next;
- if (this->device)
- free(this->device);
- if (this->mountpt)
- free(this->mountpt);
- free(this);
- this = next;
- }
-}
#include <linux/loop.h>
-static int use_loop = 0;
+static int use_loop = FALSE;
#endif
extern const char mtab_file[]; /* Defined in utility.c */
char *mtab_opts)
{
int status = 0;
+ char *lofile = NULL;
#if defined BB_MTAB
if (fakeIt == FALSE)
#endif
{
#if defined BB_FEATURE_MOUNT_LOOP
- if (use_loop) {
+ if (use_loop==TRUE) {
int loro = flags & MS_RDONLY;
char *lofile = specialfile;
fprintf(stderr, "WARNING: loop device is read-only\n");
flags &= ~MS_RDONLY;
}
+ use_loop = FALSE;
}
#endif
status =
/* Bummer. mount failed. Clean up */
#if defined BB_FEATURE_MOUNT_LOOP
- if (specialfile != NULL) {
+ if (lofile != NULL) {
del_loop(specialfile);
}
#endif
-#if defined BB_MTAB
-#define whine_if_fstab_is_missing() {}
-#else
-extern void whine_if_fstab_is_missing()
-{
- struct stat statBuf;
-
- if (stat("/etc/fstab", &statBuf) < 0)
- fprintf(stderr,
- "/etc/fstab file missing -- install one to name /dev/root.\n\n");
-}
-#endif
-
-
/* Seperate standard mount options from the nonstandard string options */
static void
parse_mount_options(char *options, unsigned long *flags, char *strflags)
}
#if defined BB_FEATURE_MOUNT_LOOP
if (gotone == FALSE && !strcasecmp("loop", options)) { /* loop device support */
- use_loop = 1;
+ use_loop = TRUE;
gotone = TRUE;
}
#endif
int
mount_one(char *blockDevice, char *directory, char *filesystemType,
unsigned long flags, char *string_flags, int useMtab, int fakeIt,
- char *mtab_opts)
+ char *mtab_opts, int whineOnErrors)
{
int status = 0;
fakeIt, mtab_opts);
}
- if (status == FALSE) {
- fprintf(stderr, "Mounting %s on %s failed: %s\n",
- blockDevice, directory, strerror(errno));
+ if (status == FALSE && whineOnErrors == TRUE) {
+ if (whineOnErrors == TRUE) {
+ fprintf(stderr, "Mounting %s on %s failed: %s\n",
+ blockDevice, directory, strerror(errno));
+ }
return (FALSE);
}
return (TRUE);
exit(FALSE);
}
while ((m = getmntent(f)) != NULL) {
- // If the file system isn't noauto, and isn't mounted on /,
+ // If the file system isn't noauto,
// and isn't swap or nfs, then mount it
if ((!strstr(m->mnt_opts, "noauto")) &&
- (m->mnt_dir[1] != '\0') &&
(!strstr(m->mnt_type, "swap")) &&
(!strstr(m->mnt_type, "nfs"))) {
flags = 0;
*string_flags = '\0';
parse_mount_options(m->mnt_opts, &flags, string_flags);
- mount_one(m->mnt_fsname, m->mnt_dir, m->mnt_type,
+ /* If the directory is /, try to remount
+ * with the options specified in fstab */
+ if (m->mnt_dir[0] == '/' && m->mnt_dir[1] == '\0') {
+ flags |= MS_REMOUNT;
+ }
+ if (mount_one(m->mnt_fsname, m->mnt_dir, m->mnt_type,
flags, string_flags, useMtab, fakeIt,
- extra_opts);
+ extra_opts, FALSE))
+ {
+ /* Try again, but this time try a remount */
+ mount_one(m->mnt_fsname, m->mnt_dir, m->mnt_type,
+ flags|MS_REMOUNT, string_flags, useMtab, fakeIt,
+ extra_opts, TRUE);
+ }
}
}
endmntent(f);
#endif
exit(mount_one(device, directory, filesystemType,
flags, string_flags, useMtab, fakeIt,
- extra_opts));
+ extra_opts, TRUE));
} else {
goto goodbye;
}
static const char *appName;
static const char swapoff_usage[] =
+ "swapoff [OPTION] [device]\n\n"
+ "Stop swapping virtual memory pages on the given device.\n\n"
+ "Options:\n"
+ "\t-a\tStop swapping on all swap devices\n";
- "swapoff device\n"
- "\nStop swapping virtual memory pages on the given device.\n";
static const char swapon_usage[] =
-
- "swapon device\n"
- "\nStart swapping virtual memory pages on the given device.\n";
+ "swapon [OPTION] [device]\n\n"
+ "Start swapping virtual memory pages on the given device.\n\n"
+ "Options:\n"
+ "\t-a\tStart swapping on all swap devices\n";
#define SWAPON_APP 1
extern int swap_on_off_main(int argc, char **argv)
{
- struct stat statBuf;
-
- if (stat("/etc/fstab", &statBuf) < 0)
- fprintf(stderr,
- "/etc/fstab file missing -- Please install one.\n\n");
-
if (strcmp(*argv, "swapon") == 0) {
appName = *argv;
whichApp = SWAPON_APP;
whichApp = SWAPOFF_APP;
}
- if (argc < 2)
+ if (argc != 2) {
goto usage_and_exit;
+ }
argc--;
argv++;
while (*++(*argv))
switch (**argv) {
case 'a':
+ whine_if_fstab_is_missing();
do_em_all();
break;
default:
#include <fstab.h>
#include <errno.h>
+
static const char umount_usage[] =
"umount [flags] filesystem|directory\n\n"
"Flags:\n" "\t-a:\tUnmount all file systems"
static int doRemount = FALSE;
extern const char mtab_file[]; /* Defined in utility.c */
-#define MIN(x,y) (x > y ? x : y)
+
+/* These functions are here because the getmntent functions do not appear
+ * to be re-entrant, which leads to all sorts of problems when we try to
+ * use them recursively - randolph
+ */
+void mtab_read(void)
+{
+ struct _mtab_entry_t *entry = NULL;
+ struct mntent *e;
+ FILE *fp;
+
+ if (mtab_cache != NULL)
+ return;
+
+ if ((fp = setmntent(mtab_file, "r")) == NULL) {
+ fprintf(stderr, "Cannot open %s\n", mtab_file);
+ return;
+ }
+ while ((e = getmntent(fp))) {
+ entry = malloc(sizeof(struct _mtab_entry_t));
+
+ entry->device = strdup(e->mnt_fsname);
+ entry->mountpt = strdup(e->mnt_dir);
+ entry->next = mtab_cache;
+ mtab_cache = entry;
+ }
+ endmntent(fp);
+}
+
+char *mtab_getinfo(const char *match, const char which)
+{
+ struct _mtab_entry_t *cur = mtab_cache;
+
+ while (cur) {
+ if (strcmp(cur->mountpt, match) == 0 ||
+ strcmp(cur->device, match) == 0) {
+ if (which == MTAB_GETMOUNTPT) {
+ return cur->mountpt;
+ } else {
+#if !defined BB_MTAB
+ if (strcmp(cur->device, "/dev/root") == 0) {
+ struct fstab *fstabItem;
+
+ fstabItem = getfsfile("/");
+ if (fstabItem != NULL)
+ return fstabItem->fs_spec;
+ }
+#endif
+ return cur->device;
+ }
+ }
+ cur = cur->next;
+ }
+ return NULL;
+}
+
+char *mtab_first(void **iter)
+{
+ struct _mtab_entry_t *mtab_iter;
+
+ if (!iter)
+ return NULL;
+ mtab_iter = mtab_cache;
+ *iter = (void *) mtab_iter;
+ return mtab_next(iter);
+}
+
+char *mtab_next(void **iter)
+{
+ char *mp;
+
+ if (iter == NULL || *iter == NULL)
+ return NULL;
+ mp = ((struct _mtab_entry_t *) (*iter))->mountpt;
+ *iter = (void *) ((struct _mtab_entry_t *) (*iter))->next;
+ return mp;
+}
+
+void mtab_free(void)
+{
+ struct _mtab_entry_t *this, *next;
+
+ this = mtab_cache;
+ while (this) {
+ next = this->next;
+ if (this->device)
+ free(this->device);
+ if (this->mountpt)
+ free(this->mountpt);
+ free(this);
+ this = next;
+ }
+}
static int do_umount(const char *name, int useMtab)
{
void *iter;
for (mountpt = mtab_first(&iter); mountpt; mountpt = mtab_next(&iter)) {
+ /* Never umount /proc on a umount -a */
+ if (strstr(mountpt, "proc")!= NULL)
+ continue;
status = do_umount(mountpt, useMtab);
if (status != 0) {
/* Don't bother retrying the umount on busy devices */
}
}
-
-
-/* These functions are here because the getmntent functions do not appear
- * to be re-entrant, which leads to all sorts of problems when we try to
- * use them recursively - randolph
- */
-void mtab_read(void)
-{
- struct _mtab_entry_t *entry = NULL;
- struct mntent *e;
- FILE *fp;
-
- if (mtab_cache != NULL)
- return;
-
- if ((fp = setmntent(mtab_file, "r")) == NULL) {
- fprintf(stderr, "Cannot open %s\n", mtab_file);
- return;
- }
- while ((e = getmntent(fp))) {
- entry = malloc(sizeof(struct _mtab_entry_t));
-
- entry->device = strdup(e->mnt_fsname);
- entry->mountpt = strdup(e->mnt_dir);
- entry->next = mtab_cache;
- mtab_cache = entry;
- }
- endmntent(fp);
-}
-
-char *mtab_getinfo(const char *match, const char which)
-{
- struct _mtab_entry_t *cur = mtab_cache;
-
- while (cur) {
- if (strcmp(cur->mountpt, match) == 0 ||
- strcmp(cur->device, match) == 0) {
- if (which == MTAB_GETMOUNTPT) {
- return cur->mountpt;
- } else {
-#if !defined BB_MTAB
- if (strcmp(cur->device, "/dev/root") == 0) {
- struct fstab *fstabItem;
-
- fstabItem = getfsfile("/");
- if (fstabItem != NULL)
- return fstabItem->fs_spec;
- }
-#endif
- return cur->device;
- }
- }
- cur = cur->next;
- }
- return NULL;
-}
-
-char *mtab_first(void **iter)
-{
- struct _mtab_entry_t *mtab_iter;
-
- if (!iter)
- return NULL;
- mtab_iter = mtab_cache;
- *iter = (void *) mtab_iter;
- return mtab_next(iter);
-}
-
-char *mtab_next(void **iter)
-{
- char *mp;
-
- if (iter == NULL || *iter == NULL)
- return NULL;
- mp = ((struct _mtab_entry_t *) (*iter))->mountpt;
- *iter = (void *) ((struct _mtab_entry_t *) (*iter))->next;
- return mp;
-}
-
-void mtab_free(void)
-{
- struct _mtab_entry_t *this, *next;
-
- this = mtab_cache;
- while (this) {
- next = this->next;
- if (this->device)
- free(this->device);
- if (this->mountpt)
- free(this->mountpt);
- free(this);
- this = next;
- }
-}
}
#endif /* BB_FEATURE_MOUNT_LOOP */
+#if defined BB_MTAB
+#define whine_if_fstab_is_missing() {}
+#else
+extern void whine_if_fstab_is_missing()
+{
+ struct stat statBuf;
+
+ if (stat("/etc/fstab", &statBuf) < 0)
+ fprintf(stderr,
+ "/etc/fstab file missing -- install one to name /dev/root.\n\n");
+}
+#endif
+
+
/* END CODE */
projects / oweals / busybox.git / commitdiff