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libext2fs: Add an explicit error code for missing mtab file 

To reduce user confusion, if the /etc/mtab file is missing
ext2fs_check_mount_point and ext2fs_check_if_mounted will return a
new, explicit error code to indicate this case.

Addresses-Debian-Bug: #527859

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
bitmap-optimize
Theodore Ts'o 2009-05-29 00:09:57 -04:00
parent 606638906a
commit 86522281f8
2 changed files with 4 additions and 1 deletions
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3
lib/ext2fs/ext2_err.et.in
View File

@ -416,4 +416,7 @@ ec EXT2_ET_EXTENT_INVALID_LENGTH,
ec EXT2_ET_IO_CHANNEL_NO_SUPPORT_64,
"I/O Channel does not support 64-bit block numbers"
ec EXT2_NO_MTAB_FILE,
"Can't check if filesystem is mounted due to missing mtab file"
end

2
lib/ext2fs/ismounted.c
View File

@ -53,7 +53,7 @@ static errcode_t check_mntent_file(const char *mtab_file, const char *file,
*mount_flags = 0;
if ((f = setmntent (mtab_file, "r")) == NULL)
return errno;
return (errno == ENOENT ? EXT2_NO_MTAB_FILE : errno);
if (stat(file, &st_buf) == 0) {
if (S_ISBLK(st_buf.st_mode)) {
#ifndef __GNU__ /* The GNU hurd is broken with respect to stat devices */