minix/lib/libc/gen/getmntinfo.3
Ben Gras 2fe8fb192f Full switch to clang/ELF. Drop ack. Simplify.
There is important information about booting non-ack images in
docs/UPDATING. ack/aout-format images can't be built any more, and
booting clang/ELF-format ones is a little different. Updating to the
new boot monitor is recommended.

Changes in this commit:

	. drop boot monitor -> allowing dropping ack support
	. facility to copy ELF boot files to /boot so that old boot monitor
	  can still boot fairly easily, see UPDATING
	. no more ack-format libraries -> single-case libraries
	. some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases
	. drop several ack toolchain commands, but not all support
	  commands (e.g. aal is gone but acksize is not yet).
	. a few libc files moved to netbsd libc dir
	. new /bin/date as minix date used code in libc/
	. test compile fix
	. harmonize includes
	. /usr/lib is no longer special: without ack, /usr/lib plays no
	  kind of special bootstrapping role any more and bootstrapping
	  is done exclusively through packages, so releases depend even
	  less on the state of the machine making them now.
	. rename nbsd_lib* to lib*
	. reduce mtree
2012-02-14 14:52:02 +01:00

115 lines
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.\" $NetBSD: getmntinfo.3,v 1.15 2004/05/05 08:48:36 jdolecek Exp $
.\"
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.\" @(#)getmntinfo.3 8.1 (Berkeley) 6/9/93
.\"
.Dd April 14, 2004
.Dt GETMNTINFO 3
.Os
.Sh NAME
.Nm getmntinfo
.Nd get information about mounted file systems
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/types.h
.In sys/statvfs.h
.Ft int
.Fn getmntinfo "struct statvfs **mntbufp" "int flags"
.Sh DESCRIPTION
The
.Fn getmntinfo
function returns an array of
.Em statvfs
structures describing each currently mounted file system (see
.Xr statvfs 2 ) .
.Pp
The
.Fn getmntinfo
function
passes its
.Fa flags
parameter transparently to
.Xr getvfsstat 2 .
.Sh RETURN VALUES
On successful completion,
.Fn getmntinfo
returns a count of the number of elements in the array.
The pointer to the array is stored into
.Fa mntbufp .
.Pp
If an error occurs, zero is returned and the external variable
.Va errno
is set to indicate the error.
Although the pointer
.Fa mntbufp
will be unmodified, any information previously returned by
.Fn getmntinfo
will be lost.
.Sh ERRORS
The
.Fn getmntinfo
function
may fail and set
.Va errno
for any of the errors specified for the library routines
.Xr getvfsstat 2
or
.Xr malloc 3 .
.Sh SEE ALSO
.Xr getvfsstat 2 ,
.Xr mount 2 ,
.Xr statvfs 2 ,
.Xr mount 8
.Sh HISTORY
The
.Fn getmntinfo
function first appeared in
.Bx 4.4 .
It was converted from using
.Xr getfsstat 2
to
.Xr getvfsstat 2
in
.Nx 3.0 .
.Sh BUGS
The
.Fn getmntinfo
function writes the array of structures to an internal static object
and returns
a pointer to that object.
Subsequent calls to
.Fn getmntinfo
will modify the same object.
.Pp
The memory allocated by
.Fn getmntinfo
cannot be
.Xr free 3 Ns 'd
by the application.