mirror of
https://github.com/SELinuxProject/selinux
synced 2025-04-27 21:28:03 +00:00
1d5c3b7204
Remove noise while running with sanitizers or under valgrind. Signed-off-by: Christian Göttsche <cgzones@googlemail.com> Acked-by: James Carter <jwcart2@gmail.com>
121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
#include <unistd.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <ctype.h>
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#include <selinux/selinux.h>
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#include <selinux/get_context_list.h>
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static __attribute__ ((__noreturn__)) void usage(const char *name, const char *detail, int rc)
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{
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fprintf(stderr, "usage: %s [-r role] [-l level] [-s service] [-v] user [fromcon]\n", name);
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if (detail)
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fprintf(stderr, "%s: %s\n", name, detail);
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exit(rc);
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}
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int main(int argc, char **argv)
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{
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const char *cur_context, *user;
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char *usercon = NULL, *cur_con = NULL;
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char *level = NULL, *role=NULL, *seuser=NULL, *dlevel=NULL;
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char *service = NULL;
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int ret, opt;
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int verbose = 0;
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while ((opt = getopt(argc, argv, "l:r:s:v")) > 0) {
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switch (opt) {
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case 'l':
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free(level);
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level = strdup(optarg);
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break;
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case 'r':
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free(role);
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role = strdup(optarg);
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break;
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case 's':
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free(service);
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service = strdup(optarg);
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break;
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case 'v':
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verbose = 1;
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break;
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default:
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usage(argv[0], "invalid option", 1);
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}
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}
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if (((argc - optind) < 1) || ((argc - optind) > 2))
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usage(argv[0], "invalid number of arguments", 2);
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/* If selinux isn't available, bail out. */
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if (!is_selinux_enabled()) {
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fprintf(stderr,
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"%s may be used only on a SELinux kernel.\n", argv[0]);
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free(level);
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free(role);
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free(service);
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return 1;
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}
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user = argv[optind];
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/* If a context wasn't passed, use the current context. */
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if ((argc - optind) < 2) {
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if (getcon(&cur_con) < 0) {
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fprintf(stderr, "%s: couldn't get current context: %s\n", argv[0], strerror(errno));
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free(level);
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free(role);
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free(service);
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return 2;
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}
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cur_context = cur_con;
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} else
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cur_context = argv[optind + 1];
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if (security_check_context(cur_context)) {
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fprintf(stderr, "%s: invalid from context '%s'\n", argv[0], cur_context);
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free(cur_con);
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free(level);
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free(role);
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free(service);
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return 3;
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}
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ret = getseuser(user, service, &seuser, &dlevel);
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if (ret) {
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fprintf(stderr, "%s: failed to get seuser: %s\n", argv[0], strerror(errno));
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goto out;
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}
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if (! level) level=dlevel;
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if (role != NULL && role[0])
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ret = get_default_context_with_rolelevel(seuser, role, level, cur_context, &usercon);
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else
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ret = get_default_context_with_level(seuser, level, cur_context, &usercon);
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if (ret) {
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fprintf(stderr, "%s: failed to get default context: %s\n", argv[0], strerror(errno));
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goto out;
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}
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if (verbose) {
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printf("%s: %s from %s %s %s %s -> %s\n", argv[0], user, cur_context, seuser, role, level, usercon);
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} else {
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printf("%s\n", usercon);
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}
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out:
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free(role);
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free(seuser);
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if (level != dlevel) free(level);
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free(dlevel);
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free(usercon);
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free(cur_con);
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free(service);
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return ret >= 0;
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}
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