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.Dd April 7, 2003
.Dt GETFSENT 3
.Os
.Sh NAME
.Nm getfsent ,
.Nm getfsspec ,
.Nm getfsfile ,
.Nm setfsent ,
.Nm endfsent
.Nd get file system descriptor file entry
.Sh LIBRARY
Standard system libraries.
.Sh SYNOPSIS
.In fstab.h
.Ft "struct fstab *"
.Fn getfsent void
.Ft "struct fstab *"
.Fn getfsspec "const char *spec"
.Ft "struct fstab *"
.Fn getfsfile "const char *file"
.Ft int
.Fn setfsent void
.Ft void
.Fn endfsent void
.\".Ft void
.\".Fn setfstab "const char *file"
.\".Ft "const char *"
.\".Fn getfstab void
.Sh DESCRIPTION
The
.Fn getfsent ,
.Fn getfsspec ,
and
.Fn getfsfile
functions
each return a pointer to an object with the following structure
containing file system descriptions from the directory systems
consulted by the
.Nm opendirectoryd
daemon.
This will include records from the local /etc/fstab file.
.Bd -literal -offset indent
struct fstab {
	char	*fs_spec;	/* block special device name */
	char	*fs_file;	/* file system path prefix */
	char	*fs_vfstype;	/* File system type, ufs, nfs */
	char	*fs_mntops;	/* Mount options ala -o */
	char	*fs_type;	/* FSTAB_* from fs_mntops */
	int	fs_freq;	/* dump frequency, in days */
	int	fs_passno;	/* pass number on parallel fsck */
};
.Ed
.Pp
The fields have meanings described in
.Xr fstab 5 .
.Pp
The
.Fn getfsspec
and
.Fn getfsfile
functions
search in available directory services for a matching special
file name or file system file name.
.Pp
For programs wishing to read the entire database,
.Fn getfsent
searches all available directory services on it's first invocation.
It caches the returned entries in a list
and returns fstab entries one at a time.
.Pp
The
.Fn setfsent
and
.Fn endfsent
functions clear the cached results from a previous
.Fn getfsent 
call.
.Pp
Entries in the /etc/fstab file with a type field equivalent to
.Dv FSTAB_XX
are ignored.
.Sh RETURN VALUES
The
.Fn getfsent ,
.Fn getfsspec ,
and
.Fn getfsfile
functions
return a
.Dv NULL
pointer on
.Dv EOF
or error.
The
.Fn setfsent
function
returns 0 on failure, 1 on success.
The
.Fn endfsent
function
returns nothing.
.Sh FILES
.Bl -tag -width /etc/fstab -compact
.It Pa /etc/fstab
.El
.Sh SEE ALSO
.Xr opendirectoryd 8 ,
.Xr fstab 5 .
.Sh HISTORY
The
.Fn getfsent
function appeared in
.Bx 4.0 ;
the
.Fn endfsent ,
.Fn getfsfile ,
.Fn getfsspec ,
and
.Fn setfsent
functions appeared in
.Bx 4.3 .
.Sh BUGS
The data space used by
these functions is thread-specific; if future use requires the data, it should be
copied before any subsequent calls to these functions overwrite it.