*** /usr/lib/python2.2/site-packages/portage.py	2003-05-07 10:06:10.000000000 +0200
--- portage.py	2003-05-07 10:08:01.000000000 +0200
***************
*** 59,64 ****
--- 59,87 ----
  		return "/"
  getcwd()
  
+ lockdir="var/tmp/portage/"
+ def lockfile(filename,verbose=1):
+ 	"Locks on /lockdir/filename, creates the lock file if necessary"
+ 	#fd=open(root+lockdir+md5.new(filename).hexdigest(),'w')
+ 	fd=open(root+lockdir+filename,'w')
+ 	if verbose:
+ 		try:
+ 			fcntl.lockf(fd,fcntl.LOCK_EX|fcntl.LOCK_NB)
+ 		except IOError:
+ 			print green(" * ")+"Another process is holding a lock on '"+filename+"'"
+ 			print green(" * ")+"Waiting.. ",
+ 			sys.stdout.flush()
+ 			fcntl.lockf(fd,fcntl.LOCK_EX)
+ 			print "Resuming."
+ 	else:
+ 		fcntl.lockf(fd,fcntl.LOCK_EX)
+ 	return fd
+ 
+ def unlockfile(fd):
+ 	"Releases a lock on fd"
+ 	fcntl.lockf(fd,fcntl.LOCK_UN)
+ 	fd.close()
+ 
  def abssymlink(symlink):
  	"This reads symlinks, resolving the relative symlinks, and returning the absolute."
  	mylink=os.readlink(symlink)
***************
*** 1060,1065 ****
--- 1083,1089 ----
  		if listonly:
  			fetched=0
  			print ""
+ 		myfilefd=lockfile(myfile)
  		for loc in filedict[myfile]:
  			if listonly:
  				print loc+" ",
***************
*** 1120,1125 ****
--- 1144,1150 ----
  					if not myret:
  						fetched=2
  						break
+ 		unlockfile(myfilefd)
  		if (fetched!=2) and not listonly:
  			print '!!! Couldn\'t download',myfile+". Aborting."
  			return 0