AppPkg/Applications/Python: Add Python 2.7.2 sources since the release of Python...

[mirror_edk2.git] / AppPkg / Applications / Python / Python-2.7.2 / Demo / comparisons / systemtest.py

#! /usr/bin/env python\r
\r
# 3)  System Test\r
#\r
#     Given a list of directories, report any bogus symbolic links contained\r
#     anywhere in those subtrees.  A bogus symbolic link is one that cannot\r
#     be resolved because it points to a nonexistent or otherwise\r
#     unresolvable file.  Do *not* use an external find executable.\r
#     Directories may be very very deep.  Print a warning immediately if the\r
#     system you're running on doesn't support symbolic links.\r
\r
# This implementation:\r
# - takes one optional argument, using the current directory as default\r
# - uses chdir to increase performance\r
# - sorts the names per directory\r
# - prints output lines of the form "path1 -> path2" as it goes\r
# - prints error messages about directories it can't list or chdir into\r
\r
import os\r
import sys\r
from stat import *\r
\r
def main():\r
    try:\r
        # Note: can't test for presence of lstat -- it's always there\r
        dummy = os.readlink\r
    except AttributeError:\r
        print "This system doesn't have symbolic links"\r
        sys.exit(0)\r
    if sys.argv[1:]:\r
        prefix = sys.argv[1]\r
    else:\r
        prefix = ''\r
    if prefix:\r
        os.chdir(prefix)\r
        if prefix[-1:] != '/': prefix = prefix + '/'\r
        reportboguslinks(prefix)\r
    else:\r
        reportboguslinks('')\r
\r
def reportboguslinks(prefix):\r
    try:\r
        names = os.listdir('.')\r
    except os.error, msg:\r
        print "%s%s: can't list: %s" % (prefix, '.', msg)\r
        return\r
    names.sort()\r
    for name in names:\r
        if name == os.curdir or name == os.pardir:\r
            continue\r
        try:\r
            mode = os.lstat(name)[ST_MODE]\r
        except os.error:\r
            print "%s%s: can't stat: %s" % (prefix, name, msg)\r
            continue\r
        if S_ISLNK(mode):\r
            try:\r
                os.stat(name)\r
            except os.error:\r
                print "%s%s -> %s" % \\r
                      (prefix, name, os.readlink(name))\r
        elif S_ISDIR(mode):\r
            try:\r
                os.chdir(name)\r
            except os.error, msg:\r
                print "%s%s: can't chdir: %s" % \\r
                      (prefix, name, msg)\r
                continue\r
            try:\r
                reportboguslinks(prefix + name + '/')\r
            finally:\r
                os.chdir('..')\r
\r
main()\r