#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <stdint.h>

#include <errno.h>

#include <selinux/selinux.h>

#include <selinux/label.h>

int main (int argc, char **argv)

{

    struct selabel_handle *hnd = NULL;

    unsigned int backend = 0;

    struct selinux_opt selabel_option [] = {

        { SELABEL_OPT_PATH, NULL },

        { SELABEL_OPT_SUBSET, NULL },

        { SELABEL_OPT_VALIDATE, (char *) 1 },

        { SELABEL_OPT_BASEONLY, (char *) 1 }

    };

    if (argc < 8) {

        fprintf(stderr, "Invalid number of arguments\n");

        return 255;

    }

    // set backend

    if (strcmp(argv[1], "CTX_FILE") == 0)

        backend = SELABEL_CTX_FILE;

    else if (strcmp(argv[1], "CTX_MEDIA") == 0)

        backend = SELABEL_CTX_MEDIA;

    else if (strcmp(argv[1], "CTX_X") == 0)

        backend = SELABEL_CTX_X;

    else if (strcmp(argv[1], "CTX_DB") == 0)

        backend = SELABEL_CTX_DB;

#ifndef RHEL6

    else if (strcmp(argv[1], "CTX_ANDROID_PROP") == 0)

        backend = SELABEL_CTX_ANDROID_PROP;

#endif

    else

        backend = strtoul(argv[1], NULL, 10);

    if ((argc == 9) && (strcmp(argv[8], "nohandle") == 0)) {

        hnd = NULL;

    }

    else {

        // set file contexts path

        if (strcmp(argv[2], "NULL") == 0) {

            selabel_option[0].value = NULL;

        }

        else {

            selabel_option[0].value = argv[2];

        }

        // set subset

        if (strcmp(argv[3], "NULL") == 0) {

            selabel_option[1].value = NULL;

        }

        else {

            selabel_option[1].value = argv[3];

        }

        // set validate

        if (strcmp(argv[4], "0") == 0) {

            selabel_option[2].value = NULL;

        }

        else {

            selabel_option[2].value = (char *) 1;

        }

        // set baseonly

        if (strcmp(argv[5], "0") == 0) {

            selabel_option[3].value = NULL;

        }

        else {

            selabel_option[3].value = (char *) 1;

        }

        printf("selabel_options: "); 

        printf("SELABEL_OPT_PATH = %s, ", selabel_option[0].value);

        printf("SELABEL_OPT_SUBSET = %s, ", selabel_option[1].value);

        printf("SELABEL_OPT_VALIDATE = %ld, ", (long int)(intptr_t) selabel_option[2].value);

        printf("SELABEL_OPT_BASEONLY = %ld\n", (long int)(intptr_t) selabel_option[3].value);

        printf("Executing: selabel_open(SELABEL_%s, &selabel_option, 4)\n", argv[1]);

        errno = 0;

        if ((hnd = selabel_open(backend, selabel_option, 4)) == NULL) {

            perror("selabel_open - ERROR");

            return 255;

        }

    }

    int result;

    security_context_t selabel_context;

    char *path;

    if (strcmp(argv[6], "NULL") == 0) {

        path = NULL;

    }

    else {

        path = argv[6];

    }

    // notice the base 8

    int mode = strtol(argv[7], NULL, 8);

    int alias_cnt = argc-8;

    const char **aliases = malloc((alias_cnt + 1)*sizeof(const char *));

    if (aliases == NULL)

        return 255;

    printf("aliases:");

    for (int i = 0; i < alias_cnt; i++) {

        aliases[i] = argv[8 + i];

        printf(" %s", argv[8 + i]);

    }

    printf("\n");

    aliases[alias_cnt] = NULL;

    printf("Executing: selabel_lookup_best_match(hnd, &selabel_context, %s, aliases, %d)\n", path, mode);

    errno = 0;

    int e1 = 0, e2 = 0;

    if ((result = selabel_lookup_best_match(hnd, &selabel_context, path, aliases, mode)) == -1) {

        e1 = errno;

        perror("selabel_lookup_best_match - ERROR");

    }

    else {

        printf("selabel_lookup_best_match context: %s\n", selabel_context);

        freecon(selabel_context);

    }

    printf("Executing: selabel_lookup_best_match_raw(hnd, &selabel_context, %s, aliases, %d)\n", path, mode);

    errno = 0;

    if ((result = selabel_lookup_best_match_raw(hnd, &selabel_context, path, aliases, mode)) == -1) {

        e2 = errno;

        perror("selabel_lookup_best_match_raw - ERROR");

    }

    else {

        printf("selabel_lookup_best_match_raw context: %s\n", selabel_context);

        freecon(selabel_context);

    }

    if (hnd != NULL)

        selabel_close(hnd);

    if (e1 == e2)

        return e1;

    else

        return 255;

}