diff options
Diffstat (limited to 'source4/client/smbumount.c')
| -rw-r--r-- | source4/client/smbumount.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/source4/client/smbumount.c b/source4/client/smbumount.c deleted file mode 100644 index 9ea3083a6f..0000000000 --- a/source4/client/smbumount.c +++ /dev/null @@ -1,186 +0,0 @@ -/* - * smbumount.c - * - * Copyright (C) 1995-1998 by Volker Lendecke - * - */ - -#include "includes.h" - -#include <mntent.h> - -#include <asm/types.h> -#include <asm/posix_types.h> -#include <linux/smb.h> -#include <linux/smb_mount.h> -#include <linux/smb_fs.h> - -/* This is a (hopefully) temporary hack due to the fact that - sizeof( uid_t ) != sizeof( __kernel_uid_t ) under glibc. - This may change in the future and smb.h may get fixed in the - future. In the mean time, it's ugly hack time - get over it. -*/ -#undef SMB_IOC_GETMOUNTUID -#define SMB_IOC_GETMOUNTUID _IOR('u', 1, __kernel_uid_t) - -#ifndef O_NOFOLLOW -#define O_NOFOLLOW 0400000 -#endif - -static void -usage(void) -{ - printf("usage: smbumount mountpoint\n"); -} - -static int -umount_ok(const char *mount_point) -{ - /* we set O_NOFOLLOW to prevent users playing games with symlinks to - umount filesystems they don't own */ - int fid = open(mount_point, O_RDONLY|O_NOFOLLOW, 0); - __kernel_uid_t mount_uid; - - if (fid == -1) { - fprintf(stderr, "Could not open %s: %s\n", - mount_point, strerror(errno)); - return -1; - } - - if (ioctl(fid, SMB_IOC_GETMOUNTUID, &mount_uid) != 0) { - fprintf(stderr, "%s probably not smb-filesystem\n", - mount_point); - return -1; - } - - if ((getuid() != 0) - && (mount_uid != getuid())) { - fprintf(stderr, "You are not allowed to umount %s\n", - mount_point); - return -1; - } - - close(fid); - return 0; -} - -/* Make a canonical pathname from PATH. Returns a freshly malloced string. - It is up the *caller* to ensure that the PATH is sensible. i.e. - canonicalize ("/dev/fd0/.") returns "/dev/fd0" even though ``/dev/fd0/.'' - is not a legal pathname for ``/dev/fd0'' Anything we cannot parse - we return unmodified. */ -static char * -canonicalize (char *path) -{ - char *canonical = malloc (PATH_MAX + 1); - - if (!canonical) { - fprintf(stderr, "Error! Not enough memory!\n"); - return NULL; - } - - if (strlen(path) > PATH_MAX) { - fprintf(stderr, "Mount point string too long\n"); - return NULL; - } - - if (path == NULL) - return NULL; - - if (realpath (path, canonical)) - return canonical; - - strncpy (canonical, path, PATH_MAX); - canonical[PATH_MAX] = '\0'; - return canonical; -} - - -int -main(int argc, char *argv[]) -{ - int fd; - char* mount_point; - struct mntent *mnt; - FILE* mtab; - FILE* new_mtab; - - if (argc != 2) { - usage(); - exit(1); - } - - if (geteuid() != 0) { - fprintf(stderr, "smbumount must be installed suid root\n"); - exit(1); - } - - mount_point = canonicalize(argv[1]); - - if (mount_point == NULL) - { - exit(1); - } - - if (umount_ok(mount_point) != 0) { - exit(1); - } - - if (umount(mount_point) != 0) { - fprintf(stderr, "Could not umount %s: %s\n", - mount_point, strerror(errno)); - exit(1); - } - - if ((fd = open(MOUNTED"~", O_RDWR|O_CREAT|O_EXCL, 0600)) == -1) - { - fprintf(stderr, "Can't get "MOUNTED"~ lock file"); - return 1; - } - close(fd); - - if ((mtab = setmntent(MOUNTED, "r")) == NULL) { - fprintf(stderr, "Can't open " MOUNTED ": %s\n", - strerror(errno)); - return 1; - } - -#define MOUNTED_TMP MOUNTED".tmp" - - if ((new_mtab = setmntent(MOUNTED_TMP, "w")) == NULL) { - fprintf(stderr, "Can't open " MOUNTED_TMP ": %s\n", - strerror(errno)); - endmntent(mtab); - return 1; - } - - while ((mnt = getmntent(mtab)) != NULL) { - if (strcmp(mnt->mnt_dir, mount_point) != 0) { - addmntent(new_mtab, mnt); - } - } - - endmntent(mtab); - - if (fchmod (fileno (new_mtab), S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) < 0) { - fprintf(stderr, "Error changing mode of %s: %s\n", - MOUNTED_TMP, strerror(errno)); - exit(1); - } - - endmntent(new_mtab); - - if (rename(MOUNTED_TMP, MOUNTED) < 0) { - fprintf(stderr, "Cannot rename %s to %s: %s\n", - MOUNTED, MOUNTED_TMP, strerror(errno)); - exit(1); - } - - if (unlink(MOUNTED"~") == -1) - { - fprintf(stderr, "Can't remove "MOUNTED"~"); - return 1; - } - - return 0; -} |