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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-07-07 00:35:58 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-07-07 00:35:58 +0200
commitb2598623d8a4e3d3e83ee28da3ecdb0d4479a8f8 (patch)
tree3b9f408577653f48f823848ce6655558085304f0 /lib/sqfs
parent9236c4599ba41291382bb71d16bcf84d68583fba (diff)
read_inode: determine mode bits from inode type
Instead of insisting that mode bits and inode type match up, determine ignore the mode bits and determine them from the inode type. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/sqfs')
-rw-r--r--lib/sqfs/read_inode.c67
1 files changed, 26 insertions, 41 deletions
diff --git a/lib/sqfs/read_inode.c b/lib/sqfs/read_inode.c
index c6c932c..565cb5a 100644
--- a/lib/sqfs/read_inode.c
+++ b/lib/sqfs/read_inode.c
@@ -9,50 +9,38 @@
#define SWAB32(x) x = le32toh(x)
#define SWAB64(x) x = le64toh(x)
-static int check_mode(sqfs_inode_t *inode)
+static int set_mode(sqfs_inode_t *inode)
{
- switch (inode->mode & S_IFMT) {
- case S_IFSOCK:
- if (inode->type != SQFS_INODE_SOCKET &&
- inode->type != SQFS_INODE_EXT_SOCKET) {
- goto fail_mismatch;
- }
+ inode->mode &= ~S_IFMT;
+
+ switch (inode->type) {
+ case SQFS_INODE_SOCKET:
+ case SQFS_INODE_EXT_SOCKET:
+ inode->mode |= S_IFSOCK;
break;
- case S_IFLNK:
- if (inode->type != SQFS_INODE_SLINK &&
- inode->type != SQFS_INODE_EXT_SLINK) {
- goto fail_mismatch;
- }
+ case SQFS_INODE_SLINK:
+ case SQFS_INODE_EXT_SLINK:
+ inode->mode |= S_IFLNK;
break;
- case S_IFREG:
- if (inode->type != SQFS_INODE_FILE &&
- inode->type != SQFS_INODE_EXT_FILE) {
- goto fail_mismatch;
- }
+ case SQFS_INODE_FILE:
+ case SQFS_INODE_EXT_FILE:
+ inode->mode |= S_IFREG;
break;
- case S_IFBLK:
- if (inode->type != SQFS_INODE_BDEV &&
- inode->type != SQFS_INODE_EXT_BDEV) {
- goto fail_mismatch;
- }
+ case SQFS_INODE_BDEV:
+ case SQFS_INODE_EXT_BDEV:
+ inode->mode |= S_IFBLK;
break;
- case S_IFDIR:
- if (inode->type != SQFS_INODE_DIR &&
- inode->type != SQFS_INODE_EXT_DIR) {
- goto fail_mismatch;
- }
+ case SQFS_INODE_DIR:
+ case SQFS_INODE_EXT_DIR:
+ inode->mode |= S_IFDIR;
break;
- case S_IFCHR:
- if (inode->type != SQFS_INODE_CDEV &&
- inode->type != SQFS_INODE_EXT_CDEV) {
- goto fail_mismatch;
- }
+ case SQFS_INODE_CDEV:
+ case SQFS_INODE_EXT_CDEV:
+ inode->mode |= S_IFCHR;
break;
- case S_IFIFO:
- if (inode->type != SQFS_INODE_FIFO &&
- inode->type != SQFS_INODE_EXT_FIFO) {
- goto fail_mismatch;
- }
+ case SQFS_INODE_FIFO:
+ case SQFS_INODE_EXT_FIFO:
+ inode->mode |= S_IFIFO;
break;
default:
fputs("Found inode with unknown file mode\n", stderr);
@@ -60,9 +48,6 @@ static int check_mode(sqfs_inode_t *inode)
}
return 0;
-fail_mismatch:
- fputs("Found inode where type does not match mode\n", stderr);
- return -1;
}
static sqfs_inode_generic_t *read_inode_file(meta_reader_t *ir,
@@ -218,7 +203,7 @@ sqfs_inode_generic_t *meta_reader_read_inode(meta_reader_t *ir,
SWAB32(inode.mod_time);
SWAB32(inode.inode_number);
- if (check_mode(&inode))
+ if (set_mode(&inode))
return NULL;
/* inode types where the size is variable */