diff options
Diffstat (limited to 'lib/canonicalize.c')
| -rw-r--r-- | lib/canonicalize.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/canonicalize.c b/lib/canonicalize.c index 727806e1e..548e29b75 100644 --- a/lib/canonicalize.c +++ b/lib/canonicalize.c @@ -151,6 +151,9 @@ canonicalize_dm_name(const char *ptname) size_t sz; char path[256], name[256], *res = NULL; + if (!ptname || !*ptname) + return NULL; + snprintf(path, sizeof(path), "/sys/block/%s/dm/name", ptname); if (!(f = fopen(path, "r" UL_CLOEXECSTR))) return NULL; @@ -173,7 +176,7 @@ canonicalize_path(const char *path) char canonical[PATH_MAX+2]; char *p; - if (path == NULL) + if (!path || !*path) return NULL; if (!myrealpath(path, canonical, PATH_MAX+1)) @@ -199,7 +202,7 @@ canonicalize_path_restricted(const char *path) uid_t euid; gid_t egid; - if (path == NULL) + if (!path || !*path) return NULL; euid = geteuid(); |