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authorJeremy Allison <jra@samba.org>2011-10-26 12:08:51 -0700
committerJeremy Allison <jra@samba.org>2011-10-26 12:08:51 -0700
commit4b9bdee167987affbc2c4dbf381b0c61dfda3364 (patch)
tree24c41373144bb1d7c52c0f3cbdb011209eb40c6a
parent1d531090bc07b0f83b9b80239c202a87f0cbc2ef (diff)
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Add early return on stat open without O_CREAT if file doesn't exist.
Reduces one level of indentation.
-rw-r--r--source3/smbd/open.c145
1 files changed, 74 insertions, 71 deletions
diff --git a/source3/smbd/open.c b/source3/smbd/open.c
index 1e21799868..6fb891830f 100644
--- a/source3/smbd/open.c
+++ b/source3/smbd/open.c
@@ -560,86 +560,89 @@ static NTSTATUS open_file(files_struct *fsp,
}
} else {
+ uint32_t access_granted = 0;
+
fsp->fh->fd = -1; /* What we used to call a stat open. */
- if (file_existed) {
- uint32_t access_granted = 0;
+ if (!file_existed) {
+ /* File must exist for a stat open. */
+ return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+ }
- status = smbd_check_open_rights(conn,
- smb_fname,
- access_mask,
- &access_granted);
- if (!NT_STATUS_IS_OK(status)) {
- if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
- /*
- * On NT_STATUS_ACCESS_DENIED, access_granted
- * contains the denied bits.
- */
-
- if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
- (access_granted & FILE_WRITE_ATTRIBUTES) &&
- (lp_map_readonly(SNUM(conn)) ||
- lp_map_archive(SNUM(conn)) ||
- lp_map_hidden(SNUM(conn)) ||
- lp_map_system(SNUM(conn)))) {
- access_granted &= ~FILE_WRITE_ATTRIBUTES;
-
- DEBUG(10,("open_file: "
- "overrode "
- "FILE_WRITE_"
- "ATTRIBUTES "
- "on file %s\n",
- smb_fname_str_dbg(
- smb_fname)));
- }
+ status = smbd_check_open_rights(conn,
+ smb_fname,
+ access_mask,
+ &access_granted);
+ if (!NT_STATUS_IS_OK(status)) {
+ if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
+ /*
+ * On NT_STATUS_ACCESS_DENIED, access_granted
+ * contains the denied bits.
+ */
- if ((access_mask & DELETE_ACCESS) &&
- (access_granted & DELETE_ACCESS) &&
- can_delete_file_in_directory(conn,
- smb_fname)) {
- /* Were we trying to do a stat open
- * for delete and didn't get DELETE
- * access (only) ? Check if the
- * directory allows DELETE_CHILD.
- * See here:
- * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
- * for details. */
-
- access_granted &= ~DELETE_ACCESS;
-
- DEBUG(10,("open_file: "
- "overrode "
- "DELETE_ACCESS on "
- "file %s\n",
- smb_fname_str_dbg(
- smb_fname)));
- }
+ if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
+ (access_granted & FILE_WRITE_ATTRIBUTES) &&
+ (lp_map_readonly(SNUM(conn)) ||
+ lp_map_archive(SNUM(conn)) ||
+ lp_map_hidden(SNUM(conn)) ||
+ lp_map_system(SNUM(conn)))) {
+ access_granted &= ~FILE_WRITE_ATTRIBUTES;
- if (access_granted != 0) {
- DEBUG(10,("open_file: Access "
- "denied on file "
- "%s\n",
- smb_fname_str_dbg(
- smb_fname)));
- return status;
- }
- } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
- fsp->posix_open &&
- S_ISLNK(smb_fname->st.st_ex_mode)) {
- /* This is a POSIX stat open for delete
- * or rename on a symlink that points
- * nowhere. Allow. */
- DEBUG(10,("open_file: allowing POSIX "
- "open on bad symlink %s\n",
+ DEBUG(10,("open_file: "
+ "overrode "
+ "FILE_WRITE_"
+ "ATTRIBUTES "
+ "on file %s\n",
smb_fname_str_dbg(
smb_fname)));
- } else {
+ }
+
+ if ((access_mask & DELETE_ACCESS) &&
+ (access_granted & DELETE_ACCESS) &&
+ can_delete_file_in_directory(conn,
+ smb_fname)) {
+ /* Were we trying to do a stat open
+ * for delete and didn't get DELETE
+ * access (only) ? Check if the
+ * directory allows DELETE_CHILD.
+ * See here:
+ * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
+ * for details. */
+
+ access_granted &= ~DELETE_ACCESS;
+
DEBUG(10,("open_file: "
- "smbd_check_open_rights on file "
- "%s returned %s\n",
- smb_fname_str_dbg(smb_fname),
- nt_errstr(status) ));
+ "overrode "
+ "DELETE_ACCESS on "
+ "file %s\n",
+ smb_fname_str_dbg(
+ smb_fname)));
+ }
+
+ if (access_granted != 0) {
+ DEBUG(10,("open_file: Access "
+ "denied on file "
+ "%s\n",
+ smb_fname_str_dbg(
+ smb_fname)));
return status;
}
+ } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
+ fsp->posix_open &&
+ S_ISLNK(smb_fname->st.st_ex_mode)) {
+ /* This is a POSIX stat open for delete
+ * or rename on a symlink that points
+ * nowhere. Allow. */
+ DEBUG(10,("open_file: allowing POSIX "
+ "open on bad symlink %s\n",
+ smb_fname_str_dbg(
+ smb_fname)));
+ } else {
+ DEBUG(10,("open_file: "
+ "smbd_check_open_rights on file "
+ "%s returned %s\n",
+ smb_fname_str_dbg(smb_fname),
+ nt_errstr(status) ));
+ return status;
}
}
}