github.com/kubiko/snapd@v0.0.0-20201013125620-d4f3094d9ddf/cmd/decode-mount-opts/decode-mount-opts.c (about)

     1  /*
     2   * Copyright (C) 2016 Canonical Ltd
     3   *
     4   * This program is free software: you can redistribute it and/or modify
     5   * it under the terms of the GNU General Public License version 3 as
     6   * published by the Free Software Foundation.
     7   *
     8   * This program is distributed in the hope that it will be useful,
     9   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    10   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    11   * GNU General Public License for more details.
    12   *
    13   * You should have received a copy of the GNU General Public License
    14   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    15   *
    16   */
    17  
    18  #include <stdio.h>
    19  #include <stdlib.h>
    20  
    21  #include "../libsnap-confine-private/mount-opt.h"
    22  
    23  int main(int argc, char *argv[])
    24  {
    25  	if (argc != 2) {
    26  		printf("usage: decode-mount-opts OPT\n");
    27  		return 0;
    28  	}
    29  	char *end;
    30  	unsigned long mountflags = strtoul(argv[1], &end, 0);
    31  	if (*end != '\0') {
    32  		fprintf(stderr, "cannot parse given argument as a number\n");
    33  		return 1;
    34  	}
    35  	char buf[1000] = {0};
    36  	printf("%#lx is %s\n", mountflags, sc_mount_opt2str(buf, sizeof buf, mountflags));
    37  	return 0;
    38  }