annotate python/lsex.py @ 48:4674cf608131

add functionality to edit menu
author Jeff Hammel <k0scist@gmail.com>
date Sun, 28 Mar 2010 10:03:44 -0700
parents f3ab51c79813
children 71576cdc28ab
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1 #!/usr/bin/env python
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2 import os
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3
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4 # make sure duplicate path elements aren't printed twice
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5 def ordered_set(alist):
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6 seen = set()
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7 new = []
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8 for item in alist:
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9 if item in seen:
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10 continue
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11 seen.add(item)
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12 new.append(item)
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13 return new
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14
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15 def lsex(path=None):
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16 """
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17 list executable files on the path
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18 o path: list of directories to search. if not specified, use system path
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19 """
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20
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21 if path is None:
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22 # use system path
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23 path = ordered_set(os.environ['PATH'].split(':'))
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24
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25 executables = []
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26
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27 # add the executable files to the list
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28 for i in path:
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29 if not os.path.isdir(i):
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30 continue
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31 files = [ os.path.join(i,j) for j in os.listdir(i) ]
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32 files = filter(lambda x: os.access(x, os.X_OK), files)
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33 files.sort() # just to make the output pretty
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34 executables.extend(files)
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35 return executables
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36
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37 if __name__ == '__main__':
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38 for i in lsex():
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39 print i