Changeset a5a8ca7 in mainline

Timestamp:

2009-11-25T14:46:24Z (14 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

439d036

Parents:

218e50c

Message:

create jobfile in append mode and use locking to fix parallel builds

File:

• tools/jobfile.py (modified) (2 diffs)

tools/jobfile.py

@@ -33 +33 @@
 import sys
 import os
+import fcntl
 
 def usage(prname):
@@ -49 +50 @@
         options = " ".join(sys.argv[4:])
         
-        if (os.path.isfile(jobfname)):
-                jobfile = file(jobfname, "r")
-                records = jobfile.read().split("\n")
-                jobfile.close()
-        else:
-                records = []
-        
-        records.append("{%s},{%s},{%s},{%s}" % (srcfname, objfname, cwd, options))
-        
-        jobfile = file(jobfname, "w")
-        jobfile.write("\n".join(records))
+        jobfile = file(jobfname, "a")
+        fcntl.lockf(jobfile, fcntl.LOCK_EX)
+        jobfile.write("{%s},{%s},{%s},{%s}\n" % (srcfname, objfname, cwd, options))
+        fcntl.lockf(jobfile, fcntl.LOCK_UN)
         jobfile.close()