mirror of
https://github.com/SELinuxProject/selinux
synced 2024-12-22 14:02:17 +00:00
9cc6b5cf40
Check the given context a priori, to print a more user friendly message, opposed to a generic following get_ordered_context_list/_with_level failure. Notify the user about failures of get_ordered_context_list/_with_level, so no-context-found and a failure results are distinguishable. Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
92 lines
2.0 KiB
C
92 lines
2.0 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 [-l level] user [context]\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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char **list, *cur_context = NULL;
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char *user = NULL, *level = NULL;
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int ret, i, opt;
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while ((opt = getopt(argc, argv, "l:")) > 0) {
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switch (opt) {
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case 'l':
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level = strdup(optarg);
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if (!level) {
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fprintf(stderr, "memory allocation failure: %d(%s)\n",
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errno, strerror(errno));
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return 3;
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}
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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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"getconlist may be used only on a SELinux kernel.\n");
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free(level);
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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_context) < 0) {
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fprintf(stderr, "Couldn't get current context.\n");
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free(level);
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return 2;
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}
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} else {
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cur_context = argv[optind + 1];
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if (security_check_context(cur_context) != 0) {
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fprintf(stderr, "Given context '%s' is invalid.\n", cur_context);
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free(level);
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return 3;
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}
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}
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/* Get the list and print it */
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if (level)
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ret =
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get_ordered_context_list_with_level(user, level,
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cur_context, &list);
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else
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ret = get_ordered_context_list(user, cur_context, &list);
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if (ret != -1) {
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for (i = 0; list[i]; i++)
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puts(list[i]);
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freeconary(list);
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} else {
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fprintf(stderr, "get_ordered_context_list%s failure: %d(%s)\n",
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level ? "_with_level" : "", errno, strerror(errno));
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free(level);
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return 4;
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}
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free(level);
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return 0;
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}
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