-#include "internal.h"
+/* vi: set sw=4 ts=4: */
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <mntent.h>
+#include <fstab.h>
#include <sys/mount.h>
+#include "busybox.h"
-extern const char mtab_file[]; /* Defined in utility.c */
+extern const char mtab_file[]; /* Defined in utility.c */
-static char *
-stralloc(const char * string)
-{
- int length = strlen(string) + 1;
- char * n = malloc(length);
- memcpy(n, string, length);
- return n;
-}
-extern void
-erase_mtab(const char * name)
+void erase_mtab(const char *name)
{
- struct mntent entries[20];
- int count = 0;
+ struct mntent entries[20];
+ int count = 0;
FILE *mountTable = setmntent(mtab_file, "r");
- struct mntent * m;
+ struct mntent *m;
- if ( mountTable == 0
- && (mountTable = setmntent("/proc/mounts", "r")) == 0 ) {
- perror(mtab_file);
+ /* Check if reading the mtab file failed */
+ if (mountTable == 0
+ /* Bummer. fall back on trying the /proc filesystem */
+ && (mountTable = setmntent("/proc/mounts", "r")) == 0) {
+ perror_msg("%s", mtab_file);
return;
}
- while ( (m = getmntent(mountTable)) != 0 ) {
- entries[count].mnt_fsname = stralloc(m->mnt_fsname);
- entries[count].mnt_dir = stralloc(m->mnt_dir);
- entries[count].mnt_type = stralloc(m->mnt_type);
- entries[count].mnt_opts = stralloc(m->mnt_opts);
+ while ((m = getmntent(mountTable)) != 0) {
+ entries[count].mnt_fsname = strdup(m->mnt_fsname);
+ entries[count].mnt_dir = strdup(m->mnt_dir);
+ entries[count].mnt_type = strdup(m->mnt_type);
+ entries[count].mnt_opts = strdup(m->mnt_opts);
entries[count].mnt_freq = m->mnt_freq;
entries[count].mnt_passno = m->mnt_passno;
count++;
}
endmntent(mountTable);
- if ( (mountTable = setmntent(mtab_file, "w")) ) {
- int i;
- for ( i = 0; i < count; i++ ) {
- int result = ( strcmp(entries[i].mnt_fsname, name) == 0
- || strcmp(entries[i].mnt_dir, name) == 0 );
+ if ((mountTable = setmntent(mtab_file, "w"))) {
+ int i;
+
+ for (i = 0; i < count; i++) {
+ int result = (strcmp(entries[i].mnt_fsname, name) == 0
+ || strcmp(entries[i].mnt_dir, name) == 0);
- if ( result )
+ if (result)
continue;
else
addmntent(mountTable, &entries[i]);
}
endmntent(mountTable);
- }
- else if ( errno != EROFS )
- perror(mtab_file);
+ } else if (errno != EROFS)
+ perror_msg("%s", mtab_file);
}
-/*
- * Given a block device, find the mount table entry if that block device
- * is mounted.
- *
- * Given any other file (or directory), find the mount table entry for its
- * filesystem.
- */
-static struct mntent *
-findMountPoint(const char * name, const char * table)
-{
- struct stat s;
- dev_t mountDevice;
- FILE* mountTable;
- struct mntent* mountEntry;
-
- if ( stat(name, &s) != 0 )
- return 0;
-
- if ( (s.st_mode & S_IFMT) == S_IFBLK )
- mountDevice = s.st_rdev;
- else
- mountDevice = s.st_dev;
-
-
- if ( (mountTable = setmntent(table, "r")) == 0 )
- return 0;
-
- while ( (mountEntry = getmntent(mountTable)) != 0 ) {
- if ( strcmp(name, mountEntry->mnt_dir) == 0 ||
- strcmp(name, mountEntry->mnt_fsname) == 0 ) /* String match. */
- break;
- if ( stat(mountEntry->mnt_fsname, &s) == 0 &&
- s.st_rdev == mountDevice ) /* Match the device. */
- break;
- if ( stat(mountEntry->mnt_dir, &s) == 0 &&
- s.st_dev == mountDevice ) /* Match the directory's mount point. */
- break;
- }
- endmntent(mountTable);
- return mountEntry;
-}
-
-extern void
-write_mtab(char* blockDevice, char* directory,
- char* filesystemType, long flags, char* string_flags)
+void write_mtab(char *blockDevice, char *directory,
+ char *filesystemType, long flags, char *string_flags)
{
FILE *mountTable = setmntent(mtab_file, "a+");
struct mntent m;
- if ( mountTable == 0 ) {
- perror(mtab_file);
+ if (mountTable == 0) {
+ perror_msg("%s", mtab_file);
return;
}
if (mountTable) {
- int length = strlen(directory);
-
- if ( length > 1 && directory[length - 1] == '/' )
- directory[length - 1] = '\0';
+ int length = strlen(directory);
- if ( filesystemType == 0 ) {
- struct mntent * p
- = findMountPoint(blockDevice, "/proc/mounts");
+ if (length > 1 && directory[length - 1] == '/')
+ directory[length - 1] = '\0';
- if ( p && p->mnt_type )
- filesystemType = p->mnt_type;
- }
- m.mnt_fsname = blockDevice;
- m.mnt_dir = directory;
- m.mnt_type = filesystemType ? filesystemType : "default";
-
- if (*string_flags) {
- m.mnt_opts = string_flags;
- } else {
- if ( (flags | MS_RDONLY) == flags )
- m.mnt_opts = "ro";
- else
- m.mnt_opts = "rw";
- }
-
- m.mnt_freq = 0;
- m.mnt_passno = 0;
- addmntent(mountTable, &m);
- endmntent(mountTable);
- }
-}
+ if (filesystemType == 0) {
+ struct mntent *p = find_mount_point(blockDevice, "/proc/mounts");
+ if (p && p->mnt_type)
+ filesystemType = p->mnt_type;
+ }
+ m.mnt_fsname = blockDevice;
+ m.mnt_dir = directory;
+ m.mnt_type = filesystemType ? filesystemType : "default";
+
+ if (*string_flags) {
+ m.mnt_opts = string_flags;
+ } else {
+ if ((flags | MS_RDONLY) == flags)
+ m.mnt_opts = "ro";
+ else
+ m.mnt_opts = "rw";
+ }
+ m.mnt_freq = 0;
+ m.mnt_passno = 0;
+ addmntent(mountTable, &m);
+ endmntent(mountTable);
+ }
+}