| # Copyright (c) 2001-2004 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 |
| |
