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- /* uudecode utility.
- Copyright (C) 1994, 1995 Free Software Foundation, Inc.
-
- This product is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- This product is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this product; see the file COPYING. If not, write to
- the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
-
- /* Copyright (c) 1983 Regents of the University of California.
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
- 3. All advertising materials mentioning features or use of this software
- must display the following acknowledgement:
- This product includes software developed by the University of
- California, Berkeley and its contributors.
- 4. Neither the name of the University nor the names of its contributors
- may be used to endorse or promote products derived from this software
- without specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- SUCH DAMAGE. */
-
- /* Reworked to GNU style by Ian Lance Taylor, ian@airs.com, August 93. */
-
- #include "system.h"
-
- /*=====================================================================\
- | uudecode [FILE ...] |
- | |
- | Create the specified FILE, decoding as you go. Used with uuencode. |
- \=====================================================================*/
-
- #include <pwd.h>
- #include "getopt.h"
-
- struct passwd *getpwnam ();
-
- static struct option longopts[] =
- {
- { "version", no_argument, NULL, 'v' },
- { "help", no_argument, NULL, 'h' },
- { "output-file", required_argument, NULL, 'o' },
- { NULL, 0, NULL, 0 }
- };
-
- static int read_stduu __P ((const char *inname));
- static int read_base64 __P ((const char *inname));
- static int decode __P ((const char *, const char *));
- static void usage __P ((int));
-
- /* The name this program was run with. */
- const char *program_name;
-
- /* Single character decode. */
- #define DEC(Char) (((Char) - ' ') & 077)
-
-
- static int
- read_stduu (inname)
- const char *inname;
- {
- char buf[2 * BUFSIZ];
-
- while (1)
- {
- int n;
- char *p;
-
- if (fgets (buf, sizeof(buf), stdin) == NULL)
- {
- error (0, 0, _("%s: Short file"), inname);
- return 1;
- }
- p = buf;
-
- /* N is used to avoid writing out all the characters at the end of
- the file. */
-
- n = DEC (*p);
- if (n <= 0)
- break;
- for (++p; n > 0; p += 4, n -= 3)
- {
- char ch;
-
- if (n >= 3)
- {
- ch = DEC (p[0]) << 2 | DEC (p[1]) >> 4;
- putchar (ch);
- ch = DEC (p[1]) << 4 | DEC (p[2]) >> 2;
- putchar (ch);
- ch = DEC (p[2]) << 6 | DEC (p[3]);
- putchar (ch);
- }
- else
- {
- if (n >= 1)
- {
- ch = DEC (p[0]) << 2 | DEC (p[1]) >> 4;
- putchar (ch);
- }
- if (n >= 2)
- {
- ch = DEC (p[1]) << 4 | DEC (p[2]) >> 2;
- putchar (ch);
- }
- }
- }
- }
-
- if (fgets (buf, sizeof(buf), stdin) == NULL
- || strcmp (buf, "end\n"))
- {
- error (0, 0, _("%s: No `end' line"), inname);
- return 1;
- }
-
- return 0;
- }
-
- static int
- read_base64 (inname)
- const char *inname;
- {
- static const char b64_tab[256] =
- {
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*000-007*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*010-017*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*020-027*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*030-037*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*040-047*/
- '\177', '\177', '\177', '\76', '\177', '\177', '\177', '\77', /*050-057*/
- '\64', '\65', '\66', '\67', '\70', '\71', '\72', '\73', /*060-067*/
- '\74', '\75', '\177', '\177', '\177', '\100', '\177', '\177', /*070-077*/
- '\177', '\0', '\1', '\2', '\3', '\4', '\5', '\6', /*100-107*/
- '\7', '\10', '\11', '\12', '\13', '\14', '\15', '\16', /*110-117*/
- '\17', '\20', '\21', '\22', '\23', '\24', '\25', '\26', /*120-127*/
- '\27', '\30', '\31', '\177', '\177', '\177', '\177', '\177', /*130-137*/
- '\177', '\32', '\33', '\34', '\35', '\36', '\37', '\40', /*140-147*/
- '\41', '\42', '\43', '\44', '\45', '\46', '\47', '\50', /*150-157*/
- '\51', '\52', '\53', '\54', '\55', '\56', '\57', '\60', /*160-167*/
- '\61', '\62', '\63', '\177', '\177', '\177', '\177', '\177', /*170-177*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*200-207*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*210-217*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*220-227*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*230-237*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*240-247*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*250-257*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*260-267*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*270-277*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*300-307*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*310-317*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*320-327*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*330-337*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*340-347*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*350-357*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*360-367*/
- '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*370-377*/
- };
- unsigned char buf[2 * BUFSIZ];
-
- while (1)
- {
- int last_data = 0;
- unsigned char *p;
-
- if (fgets (buf, sizeof(buf), stdin) == NULL)
- {
- error (0, 0, _("%s: Short file"), inname);
- return 1;
- }
- p = buf;
-
- if (memcmp (buf, "====", 4) == 0)
- break;
- if (last_data != 0)
- {
- error (0, 0, _("%s: data following `=' padding character"), inname);
- return 1;
- }
-
- /* The following implementation of the base64 decoding might look
- a bit clumsy but I only try to follow the POSIX standard:
- ``All line breaks or other characters not found in the table
- [with base64 characters] shall be ignored by decoding
- software.'' */
- while (*p != '\n')
- {
- char c1, c2, c3;
-
- while ((b64_tab[*p] & '\100') != 0)
- if (*p == '\n' || *p++ == '=')
- break;
- if (*p == '\n')
- /* This leaves the loop. */
- continue;
- c1 = b64_tab[*p++];
-
- while ((b64_tab[*p] & '\100') != 0)
- if (*p == '\n' || *p++ == '=')
- {
- error (0, 0, _("%s: illegal line"), inname);
- return 1;
- }
- c2 = b64_tab[*p++];
-
- while (b64_tab[*p] == '\177')
- if (*p++ == '\n')
- {
- error (0, 0, _("%s: illegal line"), inname);
- return 1;
- }
- if (*p == '=')
- {
- putchar (c1 << 2 | c2 >> 4);
- last_data = 1;
- break;
- }
- c3 = b64_tab[*p++];
-
- while (b64_tab[*p] == '\177')
- if (*p++ == '\n')
- {
- error (0, 0, _("%s: illegal line"), inname);
- return 1;
- }
- putchar (c1 << 2 | c2 >> 4);
- putchar (c2 << 4 | c3 >> 2);
- if (*p == '=')
- {
- last_data = 1;
- break;
- }
- else
- putchar (c3 << 6 | b64_tab[*p++]);
- }
- }
-
- return 0;
- }
-
-
- static int
- decode (inname, forced_outname)
- const char *inname;
- const char *forced_outname;
- {
- struct passwd *pw;
- register int n;
- register char *p;
- int mode, n1;
- char buf[2 * BUFSIZ];
- char *outname;
- int do_base64 = 0;
-
- /* Search for header line. */
-
- while (1)
- {
- if (fgets (buf, sizeof (buf), stdin) == NULL)
- {
- error (0, 0, _("%s: No `begin' line"), inname);
- return 1;
- }
-
- if (strncmp (buf, "begin", 5) == 0)
- {
- if (sscanf (buf, "begin-base64 %o %s", &mode, buf) == 2)
- {
- do_base64 = 1;
- break;
- }
- else if (sscanf (buf, "begin %o %s", &mode, buf) == 2)
- break;
- }
- }
-
- /* If the output file name is given on the command line this rules. */
- if (forced_outname != NULL)
- outname = (char *) forced_outname;
- else
- {
- /* Handle ~user/file format. */
-
- if (buf[0] != '~')
- outname = buf;
- else
- {
- p = buf + 1;
- while (*p != '/')
- ++p;
- if (*p == '\0')
- {
- error (0, 0, _("%s: Illegal ~user"), inname);
- return 1;
- }
- *p++ = '\0';
- pw = getpwnam (buf + 1);
- if (pw == NULL)
- {
- error (0, 0, _("%s: No user `%s'"), inname, buf + 1);
- return 1;
- }
- n = strlen (pw->pw_dir);
- n1 = strlen (p);
- outname = (char *) alloca ((size_t) (n + n1 + 2));
- memcpy (outname + n + 1, p, (size_t) (n1 + 1));
- memcpy (outname, pw->pw_dir, (size_t) n);
- outname[n] = '/';
- }
- }
-
- /* Create output file and set mode. */
-
- if (strcmp (outname, "/dev/stdout") != 0 && strcmp (outname, "-") != 0
- && (freopen (outname, "w", stdout) == NULL
- #if HAVE_FCHMOD
- || fchmod (fileno (stdout), mode & (S_IRWXU | S_IRWXG | S_IRWXO))
- #else
- || chmod (outname, mode & (S_IRWXU | S_IRWXG | S_IRWXO))
- #endif
- ))
- {
- error (0, errno, "%s: %s", outname, inname);
- return 1;
- }
-
- /* We differenciate decoding standard UU encoding and base64. A
- common function would only slow down the program. */
-
- /* For each input line: */
- if (do_base64)
- return read_base64 (inname);
- else
- return read_stduu (inname);
- }
-
- static void
- usage (status)
- int status;
- {
- if (status != 0)
- fprintf (stderr, _("Try `%s --help' for more information.\n"),
- program_name);
- else
- {
- printf (_("Usage: %s [FILE]...\n"), program_name);
- printf (_("\
- Mandatory arguments to long options are mandatory to short options too.\n\
- -h, --help display this help and exit\n\
- -v, --version output version information and exit\n\
- -o, --output-file=FILE direct output to FILE\n"));
- }
- exit (status);
- }
-
- int
- main (argc, argv)
- int argc;
- char *const *argv;
- {
- int opt;
- int exit_status;
- const char *outname;
-
- program_name = argv[0];
- outname = NULL;
- setlocale (LC_ALL, "");
-
- /* Set the text message domain. */
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
-
- while (opt = getopt_long (argc, argv, "ho:v", longopts, (int *) NULL),
- opt != EOF)
- {
- switch (opt)
- {
- case 'h':
- usage (EXIT_SUCCESS);
-
- case 'o':
- outname = optarg;
- break;
-
- case 'v':
- printf ("%s - GNU %s %s\n", program_name, PACKAGE, VERSION);
- exit (EXIT_SUCCESS);
-
- case 0:
- break;
-
- default:
- usage (EXIT_FAILURE);
- }
- }
-
- if (optind == argc)
- exit_status = decode ("stdin", outname) == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
- else
- {
- exit_status = EXIT_SUCCESS;
- do
- {
- if (freopen (argv[optind], "r", stdin) != NULL)
- {
- if (decode (argv[optind], outname) != 0)
- exit_status = EXIT_FAILURE;
- }
- else
- {
- error (0, errno, "%s", argv[optind]);
- exit_status = EXIT_FAILURE;
- }
- optind++;
- }
- while (optind < argc);
- }
-
- exit (exit_status);
- }
-