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/* Authors: Karl MacMillan <kmacmillan@tresys.com>
* Joshua Brindle <jbrindle@tresys.com>
*
* Copyright (C) 2004 Tresys Technology, LLC
* This program 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, version 2.
*/
#include <sepol/policydb.h>
#include <sepol/module.h>
#include <getopt.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#define EXPANDPOLICY_VERSION "1.0"
static void usage(const char *program_name)
{
printf("usage: %s [-h -V -a -c [version] -v] basemodpkg outputfile\n",
program_name);
}
int main(int argc, char **argv)
{
const char *basename, *outname;
int ch, ret, show_version = 0, verbose = 0, policyvers = 0, check_assertions = 1;
struct sepol_policy_file *pf = NULL;
sepol_module_package_t *base = NULL;
sepol_policydb_t *out = NULL, *p;
FILE *fp = NULL, *outfile = NULL;
sepol_handle_t *handle = NULL;
while ((ch = getopt(argc, argv, "c:Vvah")) != EOF) {
switch (ch) {
case 'V':
show_version = 1;
break;
case 'v':
verbose = 1;
break;
case 'h':
usage(argv[0]);
return EXIT_SUCCESS;
case 'c':{
long int n;
errno = 0;
n = strtol(optarg, NULL, 10);
if (errno) {
fprintf(stderr,
"%s: Invalid policyvers specified: %s\n",
argv[0], optarg);
usage(argv[0]);
return EXIT_FAILURE;
}
if (n < sepol_policy_kern_vers_min()
|| n > sepol_policy_kern_vers_max()) {
fprintf(stderr,
"%s: policyvers value %ld not in range %d-%d\n",
argv[0], n,
sepol_policy_kern_vers_min(),
sepol_policy_kern_vers_max());
usage(argv[0]);
return EXIT_FAILURE;
}
policyvers = n;
break;
}
case 'a':{
check_assertions = 0;
break;
}
default:
usage(argv[0]);
return EXIT_FAILURE;
}
}
if (verbose) {
if (policyvers)
printf("Building version %d policy\n", policyvers);
}
if (show_version) {
printf("%s\n", EXPANDPOLICY_VERSION);
return EXIT_SUCCESS;
}
/* check args */
if (argc < 3 || argc - optind != 2) {
fprintf(stderr,
"%s: You must provide the base module package and output filename\n",
argv[0]);
usage(argv[0]);
return EXIT_FAILURE;
}
basename = argv[optind++];
outname = argv[optind];
handle = sepol_handle_create();
if (!handle) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
goto failure;
}
if (sepol_policy_file_create(&pf)) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
goto failure;
}
/* read the base module */
if (sepol_module_package_create(&base)) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
goto failure;
}
fp = fopen(basename, "re");
if (!fp) {
fprintf(stderr, "%s: Can't open '%s': %s\n",
argv[0], basename, strerror(errno));
goto failure;
}
sepol_policy_file_set_fp(pf, fp);
ret = sepol_module_package_read(base, pf, 0);
if (ret) {
fprintf(stderr, "%s: Error in reading package from %s\n",
argv[0], basename);
goto failure;
}
fclose(fp);
fp = NULL;
/* linking the base takes care of enabling optional avrules */
p = sepol_module_package_get_policy(base);
if (sepol_link_modules(handle, p, NULL, 0, 0)) {
fprintf(stderr, "%s: Error while enabling avrules\n", argv[0]);
goto failure;
}
/* create the output policy */
if (sepol_policydb_create(&out)) {
fprintf(stderr, "%s: Out of memory\n", argv[0]);
goto failure;
}
sepol_set_expand_consume_base(handle, 1);
if (sepol_expand_module(handle, p, out, verbose, check_assertions)) {
fprintf(stderr, "%s: Error while expanding policy\n", argv[0]);
goto failure;
}
if (policyvers) {
if (sepol_policydb_set_vers(out, policyvers)) {
fprintf(stderr, "%s: Invalid version %d\n", argv[0],
policyvers);
goto failure;
}
}
outfile = fopen(outname, "we");
if (!outfile) {
fprintf(stderr, "%s: Can't open '%s': %s\n",
argv[0], outname, strerror(errno));
goto failure;
}
sepol_policy_file_set_fp(pf, outfile);
ret = sepol_policydb_write(out, pf);
if (ret) {
fprintf(stderr,
"%s: Error while writing expanded policy to %s\n",
argv[0], outname);
goto failure;
}
ret = fclose(outfile);
outfile = NULL;
if (ret) {
fprintf(stderr, "%s: Error closing policy file %s: %s\n",
argv[0], outname, strerror(errno));
goto failure;
}
ret = EXIT_SUCCESS;
goto cleanup;
failure:
ret = EXIT_FAILURE;
cleanup:
if (outfile)
fclose(outfile);
sepol_policydb_free(out);
if (fp)
fclose(fp);
sepol_module_package_free(base);
sepol_policy_file_free(pf);
sepol_handle_destroy(handle);
return ret;
}
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