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/* Common functionality for the --test-opts flag of mount and umount.
Copyright (C) 2013 Free Software Foundation, Inc.
Written by Justus Winter <4winter@informatik.uni-hamburg.de>
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <argz.h>
#include <error.h>
#include <stdlib.h>
#include <string.h>
#include "match-options.h"
char *test_opts;
size_t test_opts_len;
int
match_options (struct mntent *mntent)
{
char *opts;
size_t opts_len;
error_t err = argz_create_sep (mntent->mnt_opts, ',', &opts, &opts_len);
if (err)
error (3, err, "parsing mount options failed");
for (char *test = test_opts;
test; test = argz_next (test_opts, test_opts_len, test))
{
char *needle = test;
int inverse = strncmp("no", needle, 2) == 0;
if (inverse)
needle += 2;
int match = 0;
for (char *opt = opts; opt; opt = argz_next (opts, opts_len, opt))
{
if (strcmp (opt, needle) == 0) {
if (inverse)
return 0; /* foo in opts, nofoo in test_opts. */
/* foo in opts, foo in test_opts, record match. */
match = 1;
}
}
if (! inverse && ! match)
return 0; /* No foo in opts, but foo in test_opts. */
}
/* If no conflicting test_opt was encountered, return success. */
return 1;
}
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