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# Module 'shutil' -- utility functions usable in a shell-like program

import posix
import path

MODEBITS = 010000 # Lower 12 mode bits
# Change this to 01000 (9 mode bits) to avoid copying setuid etc.

# Copy data from src to dst
#
def copyfile(src, dst):
 fsrc = open(src, 'r')
 fdst = open(dst, 'w')
 while 1:
 buf = fsrc.read(16*1024)
 if not buf: break
 fdst.write(buf)

# Copy mode bits from src to dst
#
def copymode(src, dst):
 st = posix.stat(src)
 mode = divmod(st[0], MODEBITS)[1]
 posix.chmod(dst, mode)

# Copy all stat info (mode bits, atime and mtime) from src to dst
#
def copystat(src, dst):
 st = posix.stat(src)
 mode = divmod(st[0], MODEBITS)[1]
 posix.chmod(dst, mode)
 posix.utimes(dst, st[7:9])

# Copy data and mode bits ("cp src dst")
#
def copy(src, dst):
 copyfile(src, dst)
 copymode(src, dst)

# Copy data and all stat info ("cp -p src dst")
#
def copy2(src, dst):
 copyfile(src, dst)
 copystat(src, dst)

# Recursively copy a directory tree.
# The destination must not already exist.
#
def copytree(src, dst):
 names = posix.listdir(src)
 posix.mkdir(dst, 0777)
 dot_dotdot = '.', '..'
 for name in names:
 if name not in dot_dotdot:
 srcname = path.cat(src, name)
 dstname = path.cat(dst, name)
 #print 'Copying', srcname, 'to', dstname
 try:
 #if path.islink(srcname):
 # linkto = posix.readlink(srcname)
 # posix.symlink(linkto, dstname)
 #elif path.isdir(srcname):
 if path.isdir(srcname):
 copytree(srcname, dstname)
 else:
 copy2(srcname, dstname)
 # XXX What about devices, sockets etc.?
 except posix.error, why:
 print 'Could not copy', srcname, 'to', dstname,
 print '(', why[1], ')'