109 lines
3.3 KiB
Groff
109 lines
3.3 KiB
Groff
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.\" Copyright (c) 1989, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)getmntinfo.3 8.1 (Berkeley) 6/9/93
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.\"
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.Dd June 9, 1993
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.Dt GETMNTINFO 3
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.Os
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.Sh NAME
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.Nm getmntinfo
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.Nd get information about mounted file systems
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.Sh SYNOPSIS
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.Fd #include <sys/param.h>
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.Fd #include <sys/ucred.h>
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.Fd #include <sys/mount.h>
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.Ft int
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.Fn getmntinfo "struct statfs **mntbufp" "int flags"
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.Sh DESCRIPTION
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The
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.Fn getmntinfo
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function
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returns an array of
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.Xr statfs
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structures describing each currently mounted file system (see
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.Xr statfs 2 ) .
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.Pp
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The
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.Fn getmntinfo
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function
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passes its
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.Fa flags
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parameter transparently to
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.Xr getfsstat 2 .
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.Sh RETURN VALUES
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On successful completion,
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.Fn getmntinfo
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returns a count of the number of elements in the array.
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The pointer to the array is stored into
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.Fa mntbufp .
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.Pp
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If an error occurs, zero is returned and the external variable
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.Va errno
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is set to indicate the error.
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Although the pointer
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.Fa mntbufp
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will be unmodified, any information previously returned by
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.Fn getmntinfo
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will be lost.
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.Sh ERRORS
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The
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.Fn getmntinfo
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function
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may fail and set errno for any of the errors specified for the library
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routines
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.Xr getfsstat 2
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or
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.Xr malloc 3 .
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.Sh SEE ALSO
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.Xr getfsstat 2 ,
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.Xr statfs 2 ,
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.Xr mount 2 ,
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.Xr mount 8
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.Sh HISTORY
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The
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.Fn getmntinfo
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function first appeared in 4.4BSD.
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.Sh BUGS
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The
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.Fn getmntinfo
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function writes the array of structures to an internal static object
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and returns
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a pointer to that object. Subsequent calls to
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.Fn getmntinfo
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will modify the same object.
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.Pp
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The memory allocated by
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.Fn getmntinfo
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cannot be
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.Xr free 2 Ns 'd
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by the application.
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