misc/mntent.h

   1 /* <mntent.h> -- Utilities for reading/writing fstab, mtab, etc.
   2 Copyright (C) 1995 Free Software Foundation, Inc.
   3 This file is part of the GNU C Library.
   4
   5 The GNU C Library is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU Library General Public License as
   7 published by the Free Software Foundation; either version 2 of the
   8 License, or (at your option) any later version.
   9
  10 The GNU C Library is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with the GNU C Library; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  18 Cambridge, MA 02139, USA.  */
  19
  20 #ifndef _MNTENT_H
  21 #define _MNTENT_H       1
  22
  23 #include <features.h>
  24 #define __need_FILE
  25 #include <stdio.h>
  26
  27
  28 /* File listing canonical interesting mount points.  */
  29 #define _PATH_MNTTAB    "/etc/fstab"
  30 #define MNTTAB          _PATH_MNTTAB /* Deprecated alias.  */
  31
  32 /* File listing currently active mount points.  */
  33 #define _PATH_MOUNTED   "/var/run/mtab"
  34 #define MOUNTED         _PATH_MOUNTED /* Deprecated alias.  */
  35
  36
  37 __BEGIN_DECLS
  38
  39 /* Structure describing a mount table entry.  */
  40 struct mntent
  41   {
  42     char *mnt_fsname;           /* Device or server for filesystem.  */
  43     char *mnt_dir;              /* Directory mounted on.  */
  44     char *mnt_type;             /* Type of filesystem: ufs, nfs, etc.  */
  45     char *mnt_opts;             /* Comma-separated options for fs.  */
  46     int mnt_freq;               /* Dump frequency (in days).  */
  47     int mnt_passno;             /* Pass number for `fsck'.  */
  48   };
  49
  50
  51 /* Prepare to begin reading and/or writing mount table entries from the
  52    beginning of FILE.  MODE is as for `fopen'.  */
  53 extern FILE *setmntent __P ((__const char *__file,
  54                              __const char *__mode));
  55
  56 /* Read one mount table entry from STREAM.  Returns a pointer to storage
  57    reused on the next call, or null for EOF or error (use feof/ferror to
  58    check).  */
  59 extern struct mntent *getmntent __P ((FILE *__stream));
  60
  61 /* Write the mount table entry described by MNT to STREAM.
  62    Return zero on success, nonzero on failure.  */
  63 extern int addmntent __P ((FILE *__stream,
  64                            __const struct mntent *__mnt));
  65
  66 /* Close a stream opened with `setmntent'.  */
  67 extern int endmntent __P ((FILE *__stream));
  68
  69 /* Search MNT->mnt_opts for an option matching OPT.
  70    Returns the address of the substring, or null if none found.  */
  71 extern char *hasmntopt __P ((__const struct mntent *__mnt,
  72                              __const char *__opt));
  73
  74
  75 __END_DECLS
  76
  77 #endif  /* mntent.h */