45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/* hasmntopt() function: test for the presence of a mount option.
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Copyright (C) 1995-2024 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <mntent.h>
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#include <string.h>
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char *
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hasmntopt (const struct mntent *mnt, const char *opt)
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{
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const size_t optlen = strlen (opt);
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char *rest = mnt->mnt_opts, *p;
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while ((p = strstr (rest, opt)) != NULL)
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{
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if ((p == rest || p[-1] == ',')
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&& (p[optlen] == '\0' || p[optlen] == '=' || p[optlen] == ','))
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return p;
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rest = strchr (p, ',');
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if (rest == NULL)
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break;
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++rest;
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}
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return NULL;
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}
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