Library import 16 (#2433)

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1 files changed, 216 insertions, 0 deletions

diff --git a/contrib/tools/python3/Lib/uu.py b/contrib/tools/python3/Lib/uu.py
new file mode 100644
index 0000000000..26bb59ae07
--- /dev/null
+++ b/contrib/tools/python3/Lib/uu.py
@@ -0,0 +1,216 @@
+#! /usr/bin/env python3
+
+# Copyright 1994 by Lance Ellinghouse
+# Cathedral City, California Republic, United States of America.
+#                        All Rights Reserved
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose and without fee is hereby granted,
+# provided that the above copyright notice appear in all copies and that
+# both that copyright notice and this permission notice appear in
+# supporting documentation, and that the name of Lance Ellinghouse
+# not be used in advertising or publicity pertaining to distribution
+# of the software without specific, written prior permission.
+# LANCE ELLINGHOUSE DISCLAIMS ALL WARRANTIES WITH REGARD TO
+# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+# FITNESS, IN NO EVENT SHALL LANCE ELLINGHOUSE CENTRUM BE LIABLE
+# FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+# Modified by Jack Jansen, CWI, July 1995:
+# - Use binascii module to do the actual line-by-line conversion
+#   between ascii and binary. This results in a 1000-fold speedup. The C
+#   version is still 5 times faster, though.
+# - Arguments more compliant with python standard
+
+"""Implementation of the UUencode and UUdecode functions.
+
+encode(in_file, out_file [,name, mode], *, backtick=False)
+decode(in_file [, out_file, mode, quiet])
+"""
+
+import binascii
+import os
+import sys
+import warnings
+
+warnings._deprecated(__name__, remove=(3, 13))
+
+__all__ = ["Error", "encode", "decode"]
+
+class Error(Exception):
+    pass
+
+def encode(in_file, out_file, name=None, mode=None, *, backtick=False):
+    """Uuencode file"""
+    #
+    # If in_file is a pathname open it and change defaults
+    #
+    opened_files = []
+    try:
+        if in_file == '-':
+            in_file = sys.stdin.buffer
+        elif isinstance(in_file, str):
+            if name is None:
+                name = os.path.basename(in_file)
+            if mode is None:
+                try:
+                    mode = os.stat(in_file).st_mode
+                except AttributeError:
+                    pass
+            in_file = open(in_file, 'rb')
+            opened_files.append(in_file)
+        #
+        # Open out_file if it is a pathname
+        #
+        if out_file == '-':
+            out_file = sys.stdout.buffer
+        elif isinstance(out_file, str):
+            out_file = open(out_file, 'wb')
+            opened_files.append(out_file)
+        #
+        # Set defaults for name and mode
+        #
+        if name is None:
+            name = '-'
+        if mode is None:
+            mode = 0o666
+
+        #
+        # Remove newline chars from name
+        #
+        name = name.replace('\n','\\n')
+        name = name.replace('\r','\\r')
+
+        #
+        # Write the data
+        #
+        out_file.write(('begin %o %s\n' % ((mode & 0o777), name)).encode("ascii"))
+        data = in_file.read(45)
+        while len(data) > 0:
+            out_file.write(binascii.b2a_uu(data, backtick=backtick))
+            data = in_file.read(45)
+        if backtick:
+            out_file.write(b'`\nend\n')
+        else:
+            out_file.write(b' \nend\n')
+    finally:
+        for f in opened_files:
+            f.close()
+
+
+def decode(in_file, out_file=None, mode=None, quiet=False):
+    """Decode uuencoded file"""
+    #
+    # Open the input file, if needed.
+    #
+    opened_files = []
+    if in_file == '-':
+        in_file = sys.stdin.buffer
+    elif isinstance(in_file, str):
+        in_file = open(in_file, 'rb')
+        opened_files.append(in_file)
+
+    try:
+        #
+        # Read until a begin is encountered or we've exhausted the file
+        #
+        while True:
+            hdr = in_file.readline()
+            if not hdr:
+                raise Error('No valid begin line found in input file')
+            if not hdr.startswith(b'begin'):
+                continue
+            hdrfields = hdr.split(b' ', 2)
+            if len(hdrfields) == 3 and hdrfields[0] == b'begin':
+                try:
+                    int(hdrfields[1], 8)
+                    break
+                except ValueError:
+                    pass
+        if out_file is None:
+            # If the filename isn't ASCII, what's up with that?!?
+            out_file = hdrfields[2].rstrip(b' \t\r\n\f').decode("ascii")
+            if os.path.exists(out_file):
+                raise Error(f'Cannot overwrite existing file: {out_file}')
+            if (out_file.startswith(os.sep) or
+                f'..{os.sep}' in out_file or (
+                    os.altsep and
+                    (out_file.startswith(os.altsep) or
+                     f'..{os.altsep}' in out_file))
+               ):
+                raise Error(f'Refusing to write to {out_file} due to directory traversal')
+        if mode is None:
+            mode = int(hdrfields[1], 8)
+        #
+        # Open the output file
+        #
+        if out_file == '-':
+            out_file = sys.stdout.buffer
+        elif isinstance(out_file, str):
+            fp = open(out_file, 'wb')
+            os.chmod(out_file, mode)
+            out_file = fp
+            opened_files.append(out_file)
+        #
+        # Main decoding loop
+        #
+        s = in_file.readline()
+        while s and s.strip(b' \t\r\n\f') != b'end':
+            try:
+                data = binascii.a2b_uu(s)
+            except binascii.Error as v:
+                # Workaround for broken uuencoders by /Fredrik Lundh
+                nbytes = (((s[0]-32) & 63) * 4 + 5) // 3
+                data = binascii.a2b_uu(s[:nbytes])
+                if not quiet:
+                    sys.stderr.write("Warning: %s\n" % v)
+            out_file.write(data)
+            s = in_file.readline()
+        if not s:
+            raise Error('Truncated input file')
+    finally:
+        for f in opened_files:
+            f.close()
+
+def test():
+    """uuencode/uudecode main program"""
+
+    import optparse
+    parser = optparse.OptionParser(usage='usage: %prog [-d] [-t] [input [output]]')
+    parser.add_option('-d', '--decode', dest='decode', help='Decode (instead of encode)?', default=False, action='store_true')
+    parser.add_option('-t', '--text', dest='text', help='data is text, encoded format unix-compatible text?', default=False, action='store_true')
+
+    (options, args) = parser.parse_args()
+    if len(args) > 2:
+        parser.error('incorrect number of arguments')
+        sys.exit(1)
+
+    # Use the binary streams underlying stdin/stdout
+    input = sys.stdin.buffer
+    output = sys.stdout.buffer
+    if len(args) > 0:
+        input = args[0]
+    if len(args) > 1:
+        output = args[1]
+
+    if options.decode:
+        if options.text:
+            if isinstance(output, str):
+                output = open(output, 'wb')
+            else:
+                print(sys.argv[0], ': cannot do -t to stdout')
+                sys.exit(1)
+        decode(input, output)
+    else:
+        if options.text:
+            if isinstance(input, str):
+                input = open(input, 'rb')
+            else:
+                print(sys.argv[0], ': cannot do -t from stdin')
+                sys.exit(1)
+        encode(input, output)
+
+if __name__ == '__main__':
+    test()