/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2022 The FreeBSD Foundation
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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.
*/
#include <sys/param.h>
#include <getopt.h>
#include <libgen.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
extern int main_decode(int, char *[]);
extern int main_encode(int, char *[]);
extern int main_base64_decode(const char *);
extern int main_base64_encode(const char *, const char *);
extern int main_quotedprintable(int, char*[]);
static int search(const char *const);
static void usage_base64(bool);
static void version_base64(void);
static void base64_encode_or_decode(int, char *[]);
enum coders {
uuencode, uudecode, b64encode, b64decode, base64, qp
};
int
main(int argc, char *argv[])
{
const char *const progname = getprogname();
int coder = search(progname);
if (coder == -1 && argc > 1) {
argc--;
argv++;
coder = search(argv[0]);
}
switch (coder) {
case uuencode:
case b64encode:
main_encode(argc, argv);
break;
case uudecode:
case b64decode:
main_decode(argc, argv);
break;
case base64:
base64_encode_or_decode(argc, argv);
break;
case qp:
main_quotedprintable(argc, argv);
break;
default:
(void)fprintf(stderr,
"usage: %1$s <uuencode | uudecode> ...\n"
" %1$s <b64encode | b64decode> ...\n"
" %1$s <base64> ...\n"
" %1$s <qp> ...\n",
progname);
exit(EX_USAGE);
}
}
static int
search(const char *const progname)
{
#define DESIGNATE(item) [item] = #item
const char *const known[] = {
DESIGNATE(uuencode),
DESIGNATE(uudecode),
DESIGNATE(b64encode),
DESIGNATE(b64decode),
DESIGNATE(base64),
DESIGNATE(qp)
};
for (size_t i = 0; i < nitems(known); i++)
if (strcmp(progname, known[i]) == 0)
return ((int)i);
return (-1);
}
static void
usage_base64(bool failure)
{
(void)fputs("usage: base64 [-w col | --wrap=col] "
"[-d | --decode] [FILE]\n"
" base64 --help\n"
" base64 --version\n", stderr);
exit(failure ? EXIT_FAILURE : EXIT_SUCCESS);
}
static void
version_base64(void)
{
(void)fputs("FreeBSD base64\n", stderr);
exit(EXIT_SUCCESS);
}
static void
base64_encode_or_decode(int argc, char *argv[])
{
int ch;
bool decode = false;
const char *w = NULL;
enum { HELP, VERSION };
static const struct option opts[] =
{
{"decode", no_argument, NULL, 'd'},
{"ignore-garbage",no_argument, NULL, 'i'},
{"wrap", required_argument, NULL, 'w'},
{"help", no_argument, NULL, HELP},
{"version", no_argument, NULL, VERSION},
{NULL, no_argument, NULL, 0}
};
while ((ch = getopt_long(argc, argv, "diw:", opts, NULL)) != -1)
switch (ch) {
case 'd':
decode = true;
break;
case 'w':
w = optarg;
break;
case 'i':
/* silently ignore */
break;
case VERSION:
version_base64();
break;
case HELP:
default:
usage_base64(ch == '?');
}
if (decode)
main_base64_decode(argv[optind]);
else
main_base64_encode(argv[optind], w);
}
