1#! /usr/bin/env python3
2
3# mkreal
4#
5# turn a symlink to a directory into a real directory
6
7import sys
8import os
9from stat import *
10
11join = os.path.join
12
13error = 'mkreal error'
14
15BUFSIZE = 32*1024
16
17def mkrealfile(name):
18    st = os.stat(name) # Get the mode
19    mode = S_IMODE(st[ST_MODE])
20    linkto = os.readlink(name) # Make sure again it's a symlink
21    f_in = open(name, 'r') # This ensures it's a file
22    os.unlink(name)
23    f_out = open(name, 'w')
24    while 1:
25        buf = f_in.read(BUFSIZE)
26        if not buf: break
27        f_out.write(buf)
28    del f_out # Flush data to disk before changing mode
29    os.chmod(name, mode)
30
31def mkrealdir(name):
32    st = os.stat(name) # Get the mode
33    mode = S_IMODE(st[ST_MODE])
34    linkto = os.readlink(name)
35    files = os.listdir(name)
36    os.unlink(name)
37    os.mkdir(name, mode)
38    os.chmod(name, mode)
39    linkto = join(os.pardir, linkto)
40    #
41    for filename in files:
42        if filename not in (os.curdir, os.pardir):
43            os.symlink(join(linkto, filename), join(name, filename))
44
45def main():
46    sys.stdout = sys.stderr
47    progname = os.path.basename(sys.argv[0])
48    if progname == '-c': progname = 'mkreal'
49    args = sys.argv[1:]
50    if not args:
51        print('usage:', progname, 'path ...')
52        sys.exit(2)
53    status = 0
54    for name in args:
55        if not os.path.islink(name):
56            print(progname+':', name+':', 'not a symlink')
57            status = 1
58        else:
59            if os.path.isdir(name):
60                mkrealdir(name)
61            else:
62                mkrealfile(name)
63    sys.exit(status)
64
65if __name__ == '__main__':
66    main()
67