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145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/* Utilities for reading/writing fstab, mtab, etc.
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Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <mntent.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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/* Prepare to begin reading and/or writing mount table entries from the
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beginning of FILE. MODE is as for `fopen'. */
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FILE *
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__setmntent (const char *file, const char *mode)
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{
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return fopen (file, mode);
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}
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weak_alias (__setmntent, setmntent)
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/* Close a stream opened with `setmntent'. */
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int
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__endmntent (FILE *stream)
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{
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if (stream) /* SunOS 4.x allows for NULL stream */
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fclose (stream);
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return 1; /* SunOS 4.x says to always return 1 */
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}
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weak_alias (__endmntent, endmntent)
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/* Read one mount table entry from STREAM. Returns a pointer to storage
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reused on the next call, or null for EOF or error (use feof/ferror to
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check). */
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struct mntent *
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__getmntent_r (FILE *stream, struct mntent *mp, char *buffer, int bufsiz)
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{
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char *head;
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do
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{
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char *end_ptr;
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if (fgets (buffer, bufsiz, stream) == NULL)
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return NULL;
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end_ptr = strchr (buffer, '\n');
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if (end_ptr != NULL) /* chop newline */
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*end_ptr = '\0';
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else
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{
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/* Not the whole line was read. Do it now but forget it. */
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char tmp[1024];
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while (fgets (tmp, sizeof tmp, stream) != NULL)
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if (strchr (tmp, '\n') != NULL)
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break;
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}
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head = buffer + strspn (buffer, " \t");
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/* skip empty lines and comment lines: */
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} while (head[0] == '\0' || head[0] == '#');
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mp->mnt_fsname = __strsep (&head, " \t") ?: (char *) "";
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if (head)
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head += strspn (head, " \t");
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mp->mnt_dir = __strsep (&head, " \t") ?: (char *) "";
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if (head)
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head += strspn (head, " \t");
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mp->mnt_type = __strsep (&head, " \t") ?: (char *) "";
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if (head)
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head += strspn (head, " \t");
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mp->mnt_opts = __strsep (&head, " \t") ?: (char *) "";
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switch (head ? sscanf (head, " %d %d ", &mp->mnt_freq, &mp->mnt_passno) : 0)
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{
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case 0:
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mp->mnt_freq = 0;
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case 1:
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mp->mnt_passno = 0;
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case 2:
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}
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return mp;
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}
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weak_alias (__getmntent_r, getmntent_r)
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/* Write the mount table entry described by MNT to STREAM.
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Return zero on success, nonzero on failure. */
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int
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__addmntent (FILE *stream, const struct mntent *mnt)
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{
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if (fseek (stream, 0, SEEK_END))
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return 1;
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return (fprintf (stream, "%s %s %s %s %d %d\n",
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mnt->mnt_fsname,
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mnt->mnt_dir,
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mnt->mnt_type,
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mnt->mnt_opts,
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mnt->mnt_freq,
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mnt->mnt_passno)
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< 0 ? 1 : 0);
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}
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weak_alias (__addmntent, addmntent)
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/* Search MNT->mnt_opts for an option matching OPT.
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Returns the address of the substring, or null if none found. */
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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' ||
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p[optlen] == '=' ||
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p[optlen] == ','))
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return p;
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rest = strchr (rest, ',');
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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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weak_alias (__hasmntopt, hasmntopt)
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