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Note lack of speedup. Remove Irix reference. Remove silly extra 

'/tmp' arg.  Change predicate to look for world-writable non-symlink
files.
This commit is contained in:
Guido van Rossum 2002-10-18 18:20:33 +00:00
parent 5e31c3f768
commit b50e1dee86
1 changed files with 6 additions and 5 deletions
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11
Demo/threads/find.py
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@ -3,14 +3,16 @@
# This demonstrates the use of a work queue and worker threads. # This demonstrates the use of a work queue and worker threads.
# It really does do more stats/sec when using multiple threads, # It really does do more stats/sec when using multiple threads,
# although the improvement is only about 20-30 percent. # although the improvement is only about 20-30 percent.
# (That was 8 years ago. In 2002, on Linux, I can't measure
# a speedup. :-( )
# I'm too lazy to write a command line parser for the full find(1) # I'm too lazy to write a command line parser for the full find(1)
# command line syntax, so the predicate it searches for is wired-in, # command line syntax, so the predicate it searches for is wired-in,
# see function selector() below. (It currently searches for files with # see function selector() below. (It currently searches for files with
# group or world write permission.) # world write permission.)
# Usage: parfind.py [-w nworkers] [directory] ... # Usage: parfind.py [-w nworkers] [directory] ...
# Default nworkers is 4, maximum appears to be 8 (on Irix 4.0.2) # Default nworkers is 4
import sys import sys
@ -98,7 +100,6 @@ class WorkQ:
# Main program # Main program
def main(): def main():
sys.argv.append("/tmp")
nworkers = 4 nworkers = 4
opts, args = getopt.getopt(sys.argv[1:], '-w:') opts, args = getopt.getopt(sys.argv[1:], '-w:')
for opt, arg in opts: for opt, arg in opts:
@ -122,8 +123,8 @@ def main():
# Feel free to change this to suit your purpose # Feel free to change this to suit your purpose
def selector(dir, name, fullname, stat): def selector(dir, name, fullname, stat):
# Look for group or world writable files # Look for world writable files that are not symlinks
return (stat[ST_MODE] & 0022) != 0 return (stat[ST_MODE] & 0002) != 0 and not S_ISLNK(stat[ST_MODE])
# The find procedure -- calls wq.addwork() for subdirectories # The find procedure -- calls wq.addwork() for subdirectories