| cmpcache | index /usr/lib/python1.5/cmpcache.py |
# Module 'cmpcache'
#
# Efficiently compare files, boolean outcome only (equal / not equal).
#
# Tricks (used in this order):
# - Use the statcache module to avoid statting files more than once
# - Files with identical type, size & mtime are assumed to be clones
# - Files with different type or size cannot be identical
# - We keep a cache of outcomes of earlier comparisons
# - We don't fork a process to run 'cmp' but read the files ourselves
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| Constants | |||
ST_ATIME = 7 ST_CTIME = 9 ST_DEV = 2 ST_GID = 5 ST_INO = 1 ST_MODE = 0 ST_MTIME = 8 ST_NLINK = 3 ST_SIZE = 6 ST_UID = 4 S_ENFMT = 1024 S_IEXEC = 64 S_IFBLK = 24576 S_IFCHR = 8192 S_IFDIR = 16384 S_IFIFO = 4096 S_IFLNK = 40960 S_IFREG = 32768 S_IFSOCK = 49152 S_IREAD = 256 S_IRGRP = 32 S_IROTH = 4 S_IRUSR = 256 S_IRWXG = 56 S_IRWXO = 7 S_IRWXU = 448 S_ISGID = 1024 S_ISUID = 2048 S_ISVTX = 512 S_IWGRP = 16 S_IWOTH = 2 S_IWRITE = 128 S_IWUSR = 128 S_IXGRP = 8 S_IXOTH = 1 S_IXUSR = 64 | |||