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- /* uudecode utility.
- Copyright (C) 1994 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, 675 Mass Ave, Cambridge, MA 02139, 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", 0, 0, 'v' },
- { "help", 0, 0, 'h' },
- { NULL, 0, 0, 0 }
- };
-
- static int decode _((const char *));
- static void usage _((int));
-
- /* The name this program was run with. */
- const char *program_name;
-
- /* Single character decode. */
- #define DEC(c) (((c) - ' ') & 077)
-
- static int
- decode (const char *filename)
- {
- struct passwd *pw;
- register int n;
- register char ch, *p;
- int mode, n1;
- char buf[2 * BUFSIZ];
- char *outname;
-
- /* Search for header line. */
-
- do
- {
- if (fgets (buf, sizeof (buf), stdin) == NULL)
- {
- error (0, 0, "%s: no `begin' line", filename);
- return 1;
- }
- }
- while (strncmp (buf, "begin ", 6) != 0)
- ;
-
- sscanf (buf, "begin %o %s", &mode, buf);
-
- /* 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", filename);
- return 1;
- }
- *p++ = '\0';
- pw = getpwnam (buf + 1);
- if (pw == NULL)
- {
- error (0, 0, "%s: no user `%s'", filename, 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 (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, filename);
- return 1;
- }
-
- /* For each input line: */
-
- while (1)
- {
- if (fgets (buf, sizeof(buf), stdin) == NULL)
- {
- error (0, 0, "%s: short file", filename);
- 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)
- {
- 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", filename);
- return 1;
- }
-
- return 0;
- }
-
- static void
- usage (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 ("\n\
- -h, --help display this help and exit\n\
- -v, --version output version information and exit\n");
- }
- exit (status);
- }
-
- int
- main (int argc, char *const *argv)
- {
- int opt;
- int exit_status;
-
- program_name = argv[0];
-
- while (opt = getopt_long (argc, argv, "hv", longopts, (int *) NULL),
- opt != EOF)
- {
- switch (opt)
- {
- case 'h':
- usage (EXIT_SUCCESS);
-
- case 'v':
- printf ("GNU %s %s\n", PRODUCT, VERSION);
- exit (EXIT_SUCCESS);
-
- case 0:
- break;
-
- default:
- usage (EXIT_FAILURE);
- }
- }
-
- if (optind == argc)
- exit_status = decode ("stdin") == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
- else
- {
- exit_status = EXIT_SUCCESS;
- do
- {
- if (freopen (argv[optind], "r", stdin) != NULL)
- {
- if (decode (argv[optind]) != 0)
- exit_status = EXIT_FAILURE;
- }
- else
- {
- error (0, errno, "%s", argv[optind]);
- exit_status = EXIT_FAILURE;
- }
- optind++;
- }
- while (optind < argc);
- }
-
- exit (exit_status);
- }
-