- added a check for broken RH5 include files. With the standard RH5

includes (ie. unpatched RH5) Samba gets file corruption because of the
incorrect definition of the shmid_ds structure. Updating your RH5
installation of glibc-devel fixes this.

- don't try to fcntl_lock() a read-only fd in shmem.c

- allow level 0 debug messages to get through in smbstatus
(This used to be commit 45553771f90087a12db0153524146d42155d1d3f)

2 files changed, 15 insertions, 0 deletions

diff --git a/source3/locking/shmem.c b/source3/locking/shmem.c
index 63d7ebd3d41..9f24076171b 100644
--- a/source3/locking/shmem.c
+++ b/source3/locking/shmem.c
@@ -656,6 +656,9 @@ static BOOL smb_shm_lock_hash_entry( unsigned int entry)
       return False;
     }
 
+  if (read_only)
+	  return True;
+
   /* Do an exclusive wait lock on the 4 byte region mapping into this entry  */
   if (fcntl_lock(smb_shm_fd, F_SETLKW, start, sizeof(int), F_WRLCK) == False)
     {
@@ -679,6 +682,9 @@ static BOOL smb_shm_unlock_hash_entry( unsigned int entry )
       DEBUG(0,("ERROR smb_shm_unlock_hash_entry : bad smb_shm_fd (%d)\n",smb_shm_fd));
       return False;
     }
+
+  if (read_only)
+	  return True;
    
   /* Do a wait lock on the 4 byte region mapping into this entry  */
   if (fcntl_lock(smb_shm_fd, F_SETLKW, start, sizeof(int), F_UNLCK) == False)
diff --git a/source3/locking/shmem_sysv.c b/source3/locking/shmem_sysv.c
index e415c2ebc5f..b9d45949479 100644
--- a/source3/locking/shmem_sysv.c
+++ b/source3/locking/shmem_sysv.c
@@ -542,6 +542,15 @@ struct shmem_ops *sysv_shm_open(int ronly)
 	int i;
 	int pid;
 
+
+
+#ifdef LINUX
+	if (sizeof(shm_ds) == 52) {
+		DEBUG(0,("WARNING: You probably have a broken set of glibc2 include files - disabling sysv shared memory\n"));
+		return NULL;
+	}
+#endif
+
 	read_only = ronly;
 
 	shm_size = lp_shmem_size();