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/*
* Copyright (c) 2020
* Canonical, Ltd. (All rights reserved)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License published by the Free Software Foundation.
*
* This program 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 program; if not, contact Canonical Ltd.
*/
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <libintl.h>
#include <limits.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/apparmor.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#define _(s) gettext(s)
#include "../libraries/libapparmor/src/private.h"
static const char *progname = NULL;
static const char *opt_file = NULL;
static const char *opt_write = NULL;
static bool opt_debug = false;
static bool opt_verbose = false;
static bool opt_extract = false;
static void usage(const char *name, bool error)
{
FILE *stream = stdout;
int status = EXIT_SUCCESS;
if (error) {
stream = stderr;
status = EXIT_FAILURE;
}
fprintf(stream,
_("USAGE: %s [OPTIONS] <SOURCE> [OUTPUT OPTIONS]\n"
"\n"
"Output AppArmor feature abi from SOURCE to OUTPUT"
"\n"
"OPTIONS:\n"
#if 0
" -d, --debug show messages with debugging information\n"
" -v, --verbose show messages with stats\n"
#endif
" -h, --help display this help\n"
"SOURCE:\n"
" -f F, --file=F load features abi from file F\n"
" -x, --extract extract features abi from the kernel\n"
"OUTPUT OPTIONS:\n"
" --stdout default, write features to stdout\n"
" -w F, --write=F write features abi to the file F instead of stdout\n"
"\n"), name);
exit(status);
}
#define error(fmt, args...) _error(_("%s: ERROR: " fmt " - %m\n"), progname, ## args)
static void _error(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
exit(EXIT_FAILURE);
}
#if 0
#define debug(fmt, args...) _debug(_("%s: DEBUG: " fmt "\n"), progname, ## args)
static void _debug(const char *fmt, ...)
{
va_list args;
if (!opt_debug)
return;
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
}
#define verbose(fmt, args...) _verbose(_(fmt "\n"), ## args)
static void _verbose(const char *fmt, ...)
{
va_list args;
if (!opt_verbose)
return;
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
}
#endif
#define ARG_STDOUT 128
static char **parse_args(int argc, char **argv)
{
int opt;
struct option long_opts[] = {
{"debug", no_argument, 0, 'd'},
{"verbose", no_argument, 0, 'v'},
{"help", no_argument, 0, 'h'},
{"extract", no_argument, 0, 'x'},
{"file", required_argument, 0, 'f'},
{"write", required_argument, 0, 'w'},
{"stdout", no_argument, 0, ARG_STDOUT},
};
while ((opt = getopt_long(argc, argv, "+dvhxf:l:w:", long_opts, NULL)) != -1) {
switch (opt) {
case 'd':
opt_debug = true;
break;
case 'v':
opt_verbose = true;
break;
case 'h':
usage(argv[0], false);
break;
case 'x':
opt_extract = true;
break;
case 'f':
opt_file = optarg;
break;
case 'w':
opt_write = optarg;
break;
case ARG_STDOUT:
opt_write = NULL;
break;
default:
usage(argv[0], true);
break;
}
}
return argv + optind;
}
/* TODO: add features intersection and testing */
int main(int argc, char **argv)
{
struct aa_features *features;
autoclose int in = -1;
autoclose int out = -1;
int rc = 0;
progname = argv[0];
argv = parse_args(argc, argv);
if (!opt_extract && !opt_file)
usage(argv[0], true);
if (opt_extract && opt_file) {
error("options --extract and --file are mutually exclusive");
}
if (opt_extract) {
rc = aa_features_new_from_kernel(&features);
if (rc == -1)
error("failed to extract features abi from the kernel");
}
if (opt_file) {
in = open(opt_file, O_RDONLY);
if (in == -1)
error("failed to open file '%s'", opt_file);
rc = aa_features_new_from_file(&features, in);
if (rc == -1)
error("failed to load features abi from file '%s'", opt_file);
}
if (opt_write) {
out = open(opt_write, O_WRONLY | O_CREAT, 00600);
if (out == -1)
error("failed to open output file '%s'", opt_write);
} else {
out = fileno(stdout);
if (out == -1)
error("failed to get stdout");
}
rc = aa_features_write_to_fd(features, out);
if (rc == -1)
error("failed to write features abi");
return 0;
}
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