[HDFS-4160] libhdfs / fuse-dfs should implement O_CREAT | O_EXCL

• Type: Improvement
• Status: Patch Available
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.0.3-alpha
• Component/s: libhdfs
• Labels: BB2015-05-TBR
• Target Version/s: 2.0.3-alpha
• Assignee: Colin McCabe
• Reporter: Colin McCabe
• Created: 07/Nov/12 02:17
• Updated: 06/May/15 03:32

Description

hdfsOpenFile contains this code:

if ((flags & O_CREAT) && (flags & O_EXCL)) {                               
  fprintf(stderr, "WARN: hdfs does not truly support O_CREATE && O_EXCL\n");
} 

But hdfsOpenFile could easily support O_CREAT | O_EXCL by calling FileSystem#create with overwrite = false.

We should do this. It would also benefit fuse-dfs.