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btrfs-progs: let test_issubvolume return the exact error 

Return any error from stat, minor cleanups.

Signed-off-by: David Sterba <dsterba@suse.com>
master
David Sterba 2016-01-13 17:45:39 +01:00
parent 33ac47b5fb
commit 7afde59e38
2 changed files with 9 additions and 9 deletions
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16
cmds-subvolume.c
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@ -223,20 +223,20 @@ out:
}
/*
* test if path is a subvolume:
* this function return
* 0-> path exists but it is not a subvolume
* 1-> path exists and it is a subvolume
* -1 -> path is unaccessible
* Test if path is a subvolume
* Returns:
* 0 - path exists but it is not a subvolume
* 1 - path exists and it is a subvolume
* < 0 - error
*/
int test_issubvolume(char *path)
int test_issubvolume(const char *path)
{
struct stat st;
int res;
res = stat(path, &st);
if(res < 0 )
return -1;
if (res < 0)
return -errno;
return (st.st_ino == BTRFS_FIRST_FREE_OBJECTID)
&& S_ISDIR(st.st_mode);

2
commands.h
View File

@ -126,7 +126,7 @@ int cmd_debug_tree(int argc, char **argv);
int cmd_rescue(int argc, char **argv);
/* subvolume exported functions */
int test_issubvolume(char *path);
int test_issubvolume(const char *path);
/* send.c */
char *get_subvol_name(char *mnt, char *full_path);