/* Utilities for reading/writing fstab, mtab, etc.
Copyright (C) 1995-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

The GNU C Library 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */

#ifndef _MNTENT_H
#define _MNTENT_H 1

#include <features.h>
#include <paths.h>
#include <bits/types/FILE.h>

/* File listing canonical interesting mount points. */
#define MNTTAB _PATH_MNTTAB /* Deprecated alias. */

/* File listing currently active mount points. */
#define MOUNTED _PATH_MOUNTED /* Deprecated alias. */


/* General filesystem types. */
#define MNTTYPE_IGNORE "ignore" /* Ignore this entry. */
#define MNTTYPE_NFS "nfs" /* Network file system. */
#define MNTTYPE_SWAP "swap" /* Swap device. */


/* Generic mount options. */
#define MNTOPT_DEFAULTS "defaults" /* Use all default options. */
#define MNTOPT_RO "ro" /* Read only. */
#define MNTOPT_RW "rw" /* Read/write. */
#define MNTOPT_SUID "suid" /* Set uid allowed. */
#define MNTOPT_NOSUID "nosuid" /* No set uid allowed. */
#define MNTOPT_NOAUTO "noauto" /* Do not auto mount. */


__BEGIN_DECLS

/* Structure describing a mount table entry. */
struct mntent
{
char *mnt_fsname; /* Device or server for filesystem. */
char *mnt_dir; /* Directory mounted on. */
char *mnt_type; /* Type of filesystem: ufs, nfs, etc. */
char *mnt_opts; /* Comma-separated options for fs. */
int mnt_freq; /* Dump frequency (in days). */
int mnt_passno; /* Pass number for `fsck'. */
};


/* Prepare to begin reading and/or writing mount table entries from the
beginning of FILE. MODE is as for `fopen'. */
extern FILE *setmntent (const char *__file, const char *__mode) __THROW;

/* Read one mount table entry from STREAM. Returns a pointer to storage
reused on the next call, or null for EOF or error (use feof/ferror to
check). */
extern struct mntent *getmntent (FILE *__stream) __THROW;

#ifdef __USE_MISC
/* Reentrant version of the above function. */
extern struct mntent *getmntent_r (FILE *__restrict __stream,
struct mntent *__restrict __result,
char *__restrict __buffer,
int __bufsize) __THROW;
#endif

/* Write the mount table entry described by MNT to STREAM.
Return zero on success, nonzero on failure. */
extern int addmntent (FILE *__restrict __stream,
const struct mntent *__restrict __mnt) __THROW;

/* Close a stream opened with `setmntent'. */
extern int endmntent (FILE *__stream) __THROW;

/* Search MNT->mnt_opts for an option matching OPT.
Returns the address of the substring, or null if none found. */
extern char *hasmntopt (const struct mntent *__mnt,
const char *__opt) __THROW;


__END_DECLS

#endif /* mntent.h */