apenwarr-redo/helpers.py
Avery Pennarun f2d34fa685 New redo-sources and redo-targets commands.
Suggested by djb in personal email, and on the mailing list.  redo-targets
lists all the targets in the database; redo-sources lists all the existing
sources (ie. files that are referred to but which aren't targets).

redo-ifcreate filenames aren't included in the redo-sources list.
2010-12-19 03:50:38 -08:00

29 lines
605 B
Python

import os, errno, fcntl
from atoi import atoi
def join(between, l):
return between.join(l)
def unlink(f):
"""Delete a file at path 'f' if it currently exists.
Unlike os.unlink(), does not throw an exception if the file didn't already
exist.
"""
try:
os.unlink(f)
except OSError, e:
if e.errno == errno.ENOENT:
pass # it doesn't exist, that's what you asked for
def close_on_exec(fd, yes):
fl = fcntl.fcntl(fd, fcntl.F_GETFD)
fl &= ~fcntl.FD_CLOEXEC
if yes:
fl |= fcntl.FD_CLOEXEC
fcntl.fcntl(fd, fcntl.F_SETFD, fl)