* Mini umount implementation for busybox
*
*
- * Copyright (C) 1999,2000 by Lineo, inc.
+ * Copyright (C) 1999,2000,2001 by Lineo, inc.
* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
*
* This program is free software; you can redistribute it and/or modify
*
*/
-#include "busybox.h"
+#include <limits.h>
#include <stdio.h>
#include <mntent.h>
#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include "busybox.h"
-#define MNT_FORCE 1
-#define MS_MGC_VAL 0xc0ed0000 /* Magic number indicatng "new" flags */
-#define MS_REMOUNT 32 /* Alter flags of a mounted FS. */
-#define MS_RDONLY 1 /* Mount read-only. */
+static const int MNT_FORCE = 1;
+static const int MS_MGC_VAL = 0xc0ed0000; /* Magic number indicatng "new" flags */
+static const int MS_REMOUNT = 32; /* Alter flags of a mounted FS. */
+static const int MS_RDONLY = 1; /* Mount read-only. */
extern int mount (__const char *__special_file, __const char *__dir,
__const char *__fstype, unsigned long int __rwflag,
#if defined BB_FEATURE_MOUNT_LOOP
static int freeLoop = TRUE;
#endif
+#if defined BB_FEATURE_MTAB_SUPPORT
static int useMtab = TRUE;
+#endif
static int umountAll = FALSE;
static int doRemount = FALSE;
extern const char mtab_file[]; /* Defined in utility.c */
* TODO: Perhaps switch to using Glibc's getmntent_r
* -Erik
*/
-void mtab_read(void)
+static void mtab_read(void)
{
struct _mtab_entry_t *entry = NULL;
struct mntent *e;
return;
if ((fp = setmntent(mtab_file, "r")) == NULL) {
- errorMsg("Cannot open %s\n", mtab_file);
+ error_msg("Cannot open %s", mtab_file);
return;
}
while ((e = getmntent(fp))) {
endmntent(fp);
}
-char *mtab_getinfo(const char *match, const char which)
+static char *mtab_getinfo(const char *match, const char which)
{
struct _mtab_entry_t *cur = mtab_cache;
if (which == MTAB_GETMOUNTPT) {
return cur->mountpt;
} else {
-#if !defined BB_MTAB
+#if !defined BB_FEATURE_MTAB_SUPPORT
if (strcmp(cur->device, "/dev/root") == 0) {
/* Adjusts device to be the real root device,
* or leaves device alone if it can't find it */
- find_real_root_device_name( cur->device);
- return ( cur->device);
+ cur->device = find_real_root_device_name(cur->device);
}
#endif
return cur->device;
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)
+static char *mtab_next(void **iter)
{
char *mp;
return mp;
}
+static 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);
+}
+
/* Don't bother to clean up, since exit() does that
* automagically, so we can save a few bytes */
#ifdef BB_FEATURE_CLEAN_UP
-void mtab_free(void)
+static void mtab_free(void)
{
struct _mtab_entry_t *this, *next;
}
#endif
-static int do_umount(const char *name, int useMtab)
+static int do_umount(const char *name)
{
int status;
char *blockDevice = mtab_getinfo(name, MTAB_GETDEVICE);
if (status != 0 && doForce == TRUE) {
status = umount2(blockDevice, MNT_FORCE);
if (status != 0) {
- fatalError("forced umount of %s failed!\n", blockDevice);
+ error_msg_and_die("forced umount of %s failed!", blockDevice);
}
}
#endif
status = mount(blockDevice, name, NULL,
MS_MGC_VAL | MS_REMOUNT | MS_RDONLY, NULL);
if (status == 0) {
- errorMsg("%s busy - remounted read-only\n", blockDevice);
+ error_msg("%s busy - remounted read-only", blockDevice);
} else {
- errorMsg("Cannot remount %s read-only\n", blockDevice);
+ error_msg("Cannot remount %s read-only", blockDevice);
}
}
if (status == 0) {
-#if defined BB_MTAB
+#if defined BB_FEATURE_MTAB_SUPPORT
if (useMtab == TRUE)
erase_mtab(name);
#endif
return (FALSE);
}
-static int umount_all(int useMtab)
+static int umount_all(void)
{
int status = TRUE;
char *mountpt;
/* Never umount /proc on a umount -a */
if (strstr(mountpt, "proc")!= NULL)
continue;
- status = do_umount(mountpt, useMtab);
- if (status != 0) {
+ if (!do_umount(mountpt)) {
/* Don't bother retrying the umount on busy devices */
if (errno == EBUSY) {
- perror(mountpt);
+ perror_msg("%s", mountpt);
+ status = FALSE;
continue;
}
- status = do_umount(mountpt, useMtab);
- if (status != 0) {
+ if (!do_umount(mountpt)) {
printf("Couldn't umount %s on %s: %s\n",
mountpt, mtab_getinfo(mountpt, MTAB_GETDEVICE),
strerror(errno));
+ status = FALSE;
}
}
}
extern int umount_main(int argc, char **argv)
{
+ char path[PATH_MAX];
+
if (argc < 2) {
- usage(umount_usage);
+ show_usage();
}
#ifdef BB_FEATURE_CLEAN_UP
atexit(mtab_free);
freeLoop = FALSE;
break;
#endif
-#ifdef BB_MTAB
+#ifdef BB_FEATURE_MTAB_SUPPORT
case 'n':
useMtab = FALSE;
break;
case 'v':
break; /* ignore -v */
default:
- usage(umount_usage);
+ show_usage();
}
}
mtab_read();
if (umountAll == TRUE) {
- if (umount_all(useMtab) == TRUE)
+ if (umount_all() == TRUE)
return EXIT_SUCCESS;
else
return EXIT_FAILURE;
}
- if (do_umount(*argv, useMtab) == TRUE)
+ if (realpath(*argv, path) == NULL)
+ perror_msg_and_die("%s", path);
+ if (do_umount(path) == TRUE)
return EXIT_SUCCESS;
- perror("umount");
- return EXIT_FAILURE;
+ perror_msg_and_die("%s", *argv);
}
projects / oweals / busybox.git / blobdiff