cpython/Tools/scripts/byteyears.py

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#! /usr/bin/env python
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# Print the product of age and size of each file, in suitable units.
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#
# Usage: byteyears [ -a | -m | -c ] file ...
#
# Options -[amc] select atime, mtime (default) or ctime as age.
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import sys, os, time
import string
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from stat import *
# Use lstat() to stat files if it exists, else stat()
try:
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statfunc = os.lstat
except AttributeError:
statfunc = os.stat
# Parse options
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if sys.argv[1] == '-m':
itime = ST_MTIME
del sys.argv[1]
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elif sys.argv[1] == '-c':
itime = ST_CTIME
del sys.argv[1]
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elif sys.argv[1] == '-a':
itime = ST_CTIME
del sys.argv[1]
else:
itime = ST_MTIME
secs_per_year = 365.0 * 24.0 * 3600.0 # Scale factor
now = time.time() # Current time, for age computations
status = 0 # Exit status, set to 1 on errors
# Compute max file name length
maxlen = 1
for file in sys.argv[1:]:
if len(file) > maxlen: maxlen = len(file)
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# Process each argument in turn
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for file in sys.argv[1:]:
try:
st = statfunc(file)
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except os.error, msg:
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sys.stderr.write('can\'t stat ' + `file` + ': ' + `msg` + '\n')
status = 1
st = ()
if st:
anytime = st[itime]
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size = st[ST_SIZE]
age = now - anytime
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byteyears = float(size) * float(age) / secs_per_year
print string.ljust(file, maxlen),
print string.rjust(`int(byteyears)`, 8)
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sys.exit(status)