X-Git-Url: http://gitweb.michael.orlitzky.com/?p=apply-default-acl.git;a=blobdiff_plain;f=src%2Flibadacl.c;fp=src%2Flibadacl.c;h=8ff0c17de6a8a91812469880af2003fbb6e6644f;hp=911e69ae3022736eab1f30e1e463b7bd18188e73;hb=cb2ef6b2386de44200124904c7a03ce8512f3585;hpb=f2f40587da3a56f9c6fa0265fd86a5dacf589276

diff --git a/src/libadacl.c b/src/libadacl.c
index 911e69a..8ff0c17 100644
--- a/src/libadacl.c
+++ b/src/libadacl.c
@@ -1004,24 +1004,18 @@ int apply_default_acl(const char* path, bool recursive) {
   }
   char* parent = dirname(dirname_path_copy);
 
-  /* Just kidding, if the path is ".", then dirname will do the wrong
-   * thing and give us "." as its parent, too. So, we handle that as a
-   * special case.
-   *
-   * WARNING: it is important that "parent" itself is not used after
-   * this point; otherwise we would need to store the correct parent
-   * path in there. But since everything uses file descriptors from
-   * now on, we only need to ensure that we get the correct parent_fd
-   * below. */
-  if (strcmp(path, ".") == 0 && strcmp(parent, ".") == 0) {
-    parent_fd = safe_open("..", O_DIRECTORY | O_NOFOLLOW);
-  }
-  else if (strcmp(path, "..") == 0 && strcmp(parent, ".") == 0) {
-    parent_fd = safe_open("../..", O_DIRECTORY | O_NOFOLLOW);
-  }
-  else {
-    parent_fd = safe_open(parent, O_DIRECTORY | O_NOFOLLOW);
+  /* Just kidding, if the path is "." or "..", then dirname will do
+   * the wrong thing and give us "." as its parent, too. So, we handle
+   * those as special cases.
+   */
+  bool path_is_dots = strcmp(path, ".") == 0 || strcmp(path, "..") == 0;
+  char dots_parent[6] = "../";
+  if (path_is_dots) {
+    parent = strcat(dots_parent, path);
   }
+
+  parent_fd = safe_open(parent, O_DIRECTORY | O_NOFOLLOW);
+
   if (parent_fd == OPEN_ERROR) {
     if (errno == ELOOP || errno == ENOTDIR) {
       /* We hit a symlink, either in the last path component (ELOOP)
@@ -1047,14 +1041,11 @@ int apply_default_acl(const char* path, bool recursive) {
     goto cleanup;
   }
 
-  /* If the basename is ".", then we don't want to open "." relative
-     to the parent_fd, so we need another special case for that
-     path. */
-  if (strcmp(path, ".") == 0 && strcmp(parent, ".") == 0) {
-    fd = open(".", O_NOFOLLOW);
-  }
-  else if (strcmp(path, "..") == 0 && strcmp(parent, ".") == 0) {
-    fd = open("..", O_NOFOLLOW);
+  /* If the basename is "." or "..", then we don't want to open it
+     relative to the parent_fd, so we need another special case for
+     those paths. */
+  if (path_is_dots) {
+    fd = open(path, O_NOFOLLOW);
   }
   else {
     fd = openat(parent_fd, basename(basename_path_copy), O_NOFOLLOW);