root/libsemanage/example/test_fcontext.c

#include <semanage/fcontext_record.h>
#include <semanage/semanage.h>
#include <semanage/fcontexts_local.h>
#include <sepol/sepol.h>

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>

int main(const int argc, const char **argv) {
        semanage_handle_t *sh = NULL;
        semanage_fcontext_t *fcontext;
        semanage_context_t *con;
        semanage_fcontext_key_t *k;

        int exist = 0;
        sh = semanage_handle_create();
        if (sh == NULL) { 
                perror("Can't create semanage handle\n");
                return -1;
        }
        if (semanage_access_check(sh) < 0) {
                perror("Semanage access check failed\n");
                return -1;
        }
        if (semanage_connect(sh) < 0) {
                perror("Semanage connect failed\n");
                return -1;
        }

        if (semanage_fcontext_key_create(sh, argv[2], SEMANAGE_FCONTEXT_REG, &k) < 0) {
                fprintf(stderr, "Could not create key for %s", argv[2]);
                return -1;
        }

        if(semanage_fcontext_exists(sh, k, &exist) < 0) {
                fprintf(stderr,"Could not check if key exists for %s", argv[2]);
                return -1;
        }
        if (exist) {
                fprintf(stderr,"Could create %s mapping already exists", argv[2]);
                return -1;
        }

        if (semanage_fcontext_create(sh, &fcontext) < 0) {
                fprintf(stderr,"Could not create file context for %s", argv[2]);
                return -1;
        }
        semanage_fcontext_set_expr(sh, fcontext, argv[2]);

        if (semanage_context_from_string(sh, argv[1], &con)) {
                fprintf(stderr,"Could not create context using %s for file context %s", argv[1], argv[2]);
                return -1;
        }

        if (semanage_fcontext_set_con(sh, fcontext, con) < 0) {
                fprintf(stderr,"Could not set file context for %s", argv[2]);
                return -1;
        }

        semanage_fcontext_set_type(fcontext, SEMANAGE_FCONTEXT_REG);

        if(semanage_fcontext_modify_local(sh, k, fcontext) < 0) {
                fprintf(stderr,"Could not add file context for %s", argv[2]);
                return -1;
        }
        semanage_fcontext_key_free(k);
        semanage_fcontext_free(fcontext);

        return 0;
}