81 lines
1.9 KiB
C
81 lines
1.9 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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void usage(char *name, char *detail, int rc)
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{
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fprintf(stderr, "usage: %s [-l level] 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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security_context_t usercon = NULL, cur_context = NULL;
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char *user = NULL, *level = NULL, *role=NULL, *seuser=NULL, *dlevel=NULL;
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int ret, opt;
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while ((opt = getopt(argc, argv, "l:r:")) > 0) {
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switch (opt) {
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case 'l':
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level = strdup(optarg);
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break;
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case 'r':
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role = strdup(optarg);
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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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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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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 ((ret = getseuserbyname(user, &seuser, &dlevel)) == 0) {
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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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}
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if (ret < 0)
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perror(argv[0]);
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else
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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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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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return 0;
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}
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