166 lines
4.2 KiB
C
166 lines
4.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2022 The FreeBSD Foundation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <getopt.h>
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#include <libgen.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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extern int main_decode(int, char *[]);
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extern int main_encode(int, char *[]);
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extern int main_base64_decode(const char *);
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extern int main_base64_encode(const char *, const char *);
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extern int main_quotedprintable(int, char*[]);
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static int search(const char *const);
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static void usage_base64(bool);
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static void version_base64(void);
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static void base64_encode_or_decode(int, char *[]);
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enum coders {
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uuencode, uudecode, b64encode, b64decode, base64, qp
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};
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int
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main(int argc, char *argv[])
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{
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const char *const progname = getprogname();
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int coder = search(progname);
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if (coder == -1 && argc > 1) {
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argc--;
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argv++;
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coder = search(argv[0]);
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}
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switch (coder) {
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case uuencode:
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case b64encode:
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main_encode(argc, argv);
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break;
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case uudecode:
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case b64decode:
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main_decode(argc, argv);
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break;
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case base64:
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base64_encode_or_decode(argc, argv);
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break;
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case qp:
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main_quotedprintable(argc, argv);
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break;
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default:
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(void)fprintf(stderr,
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"usage: %1$s <uuencode | uudecode> ...\n"
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" %1$s <b64encode | b64decode> ...\n"
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" %1$s <base64> ...\n"
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" %1$s <qp> ...\n",
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progname);
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exit(EX_USAGE);
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}
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}
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static int
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search(const char *const progname)
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{
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#define DESIGNATE(item) [item] = #item
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const char *const known[] = {
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DESIGNATE(uuencode),
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DESIGNATE(uudecode),
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DESIGNATE(b64encode),
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DESIGNATE(b64decode),
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DESIGNATE(base64),
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DESIGNATE(qp)
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};
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for (size_t i = 0; i < nitems(known); i++)
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if (strcmp(progname, known[i]) == 0)
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return ((int)i);
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return (-1);
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}
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static void
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usage_base64(bool failure)
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{
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(void)fputs("usage: base64 [-w col | --wrap=col] "
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"[-d | --decode] [FILE]\n"
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" base64 --help\n"
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" base64 --version\n", stderr);
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exit(failure ? EXIT_FAILURE : EXIT_SUCCESS);
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}
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static void
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version_base64(void)
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{
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(void)fputs("FreeBSD base64\n", stderr);
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exit(EXIT_SUCCESS);
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}
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static void
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base64_encode_or_decode(int argc, char *argv[])
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{
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int ch;
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bool decode = false;
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const char *w = NULL;
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enum { HELP, VERSION };
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static const struct option opts[] =
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{
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{"decode", no_argument, NULL, 'd'},
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{"ignore-garbage",no_argument, NULL, 'i'},
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{"wrap", required_argument, NULL, 'w'},
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{"help", no_argument, NULL, HELP},
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{"version", no_argument, NULL, VERSION},
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{NULL, no_argument, NULL, 0}
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};
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while ((ch = getopt_long(argc, argv, "diw:", opts, NULL)) != -1)
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switch (ch) {
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case 'd':
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decode = true;
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break;
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case 'w':
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w = optarg;
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break;
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case 'i':
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/* silently ignore */
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break;
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case VERSION:
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version_base64();
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break;
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case HELP:
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default:
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usage_base64(ch == '?');
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}
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if (decode)
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main_base64_decode(argv[optind]);
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else
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main_base64_encode(argv[optind], w);
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}
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