46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
|
# Copyright (c) Twisted Matrix Laboratories.
|
||
|
|
# See LICENSE for details.
|
||
|
|
|
||
|
|
"""
|
||
|
|
Utilities for dealing with processes.
|
||
|
|
"""
|
||
|
|
|
||
|
|
import os
|
||
|
|
|
||
|
|
def which(name, flags=os.X_OK):
|
||
|
|
"""Search PATH for executable files with the given name.
|
||
|
|
|
||
|
|
On newer versions of MS-Windows, the PATHEXT environment variable will be
|
||
|
|
set to the list of file extensions for files considered executable. This
|
||
|
|
will normally include things like ".EXE". This fuction will also find files
|
||
|
|
with the given name ending with any of these extensions.
|
||
|
|
|
||
|
|
On MS-Windows the only flag that has any meaning is os.F_OK. Any other
|
||
|
|
flags will be ignored.
|
||
|
|
|
||
|
|
@type name: C{str}
|
||
|
|
@param name: The name for which to search.
|
||
|
|
|
||
|
|
@type flags: C{int}
|
||
|
|
@param flags: Arguments to L{os.access}.
|
||
|
|
|
||
|
|
@rtype: C{list}
|
||
|
|
@param: A list of the full paths to files found, in the
|
||
|
|
order in which they were found.
|
||
|
|
"""
|
||
|
|
result = []
|
||
|
|
exts = filter(None, os.environ.get('PATHEXT', '').split(os.pathsep))
|
||
|
|
path = os.environ.get('PATH', None)
|
||
|
|
if path is None:
|
||
|
|
return []
|
||
|
|
for p in os.environ.get('PATH', '').split(os.pathsep):
|
||
|
|
p = os.path.join(p, name)
|
||
|
|
if os.access(p, flags):
|
||
|
|
result.append(p)
|
||
|
|
for e in exts:
|
||
|
|
pext = p + e
|
||
|
|
if os.access(pext, flags):
|
||
|
|
result.append(pext)
|
||
|
|
return result
|
||
|
|
|