2fe8fb192f
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
119 lines
3.4 KiB
Groff
119 lines
3.4 KiB
Groff
.\" $NetBSD: getdevmajor.3,v 1.5 2009/03/24 22:34:54 drochner Exp $
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.\"
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.\" Copyright (c) 2004 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Andrew Brown.
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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. 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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.Dd January 20, 2009
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.Dt GETDEVMAJOR 3
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.Os
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.Sh NAME
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.Nm getdevmajor
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.Nd get block or character device major number
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In stdlib.h
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.In sys/stat.h
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.Ft devmajor_t
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.Fn getdevmajor "const char *name" "mode_t type"
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.Sh DESCRIPTION
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The
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.Fn getdevmajor
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function returns the major device number of the block or character
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device specified by
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.Ar name
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and a file type matching the one encoded in
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.Fa type
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which must be one of
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.Dv S_IFBLK
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or
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.Dv S_IFCHR .
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.Sh RETURN VALUES
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If no device matches the specified values, no information is
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available, or an error occurs,
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.Dv NODEVMAJOR
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is returned and
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.Va errno
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is set to indicate the error.
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.Sh EXAMPLES
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To retrieve the major number for
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.Xr pty 4
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slave devices (aka pts devices):
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.Bd -literal -offset indent
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#include \*[Lt]stdlib.h\*[Gt]
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#include \*[Lt]sys/stat.h\*[Gt]
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.sp
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devmajor_t pts;
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pts = getdevmajor("pts", S_IFCHR);
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.Ed
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.Pp
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To retrieve the major numbers for the block and character
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.Xr wd 4
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devices:
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.Bd -literal -offset indent
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#include \*[Lt]stdlib.h\*[Gt]
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#include \*[Lt]sys/stat.h\*[Gt]
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.sp
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devmajor_t c, b;
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c = getdevmajor("wd", S_IFCHR);
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b = getdevmajor("wd", S_IFBLK);
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.Ed
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.Sh ERRORS
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The
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.Fn getdevmajor
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function may fail and set
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.Va errno
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for any of the errors specified for the library functions
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.Xr malloc 3
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and
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.Xr sysctlbyname 3 .
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In addition, the following errors may be reported:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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The value of the
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.Fa type
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argument is not
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.Dv S_IFCHR
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or
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.Dv S_IFBLK .
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.It Bq Er ENOENT
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The named device is not found.
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.El
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.Sh SEE ALSO
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.Xr stat 2 ,
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.Xr devname 3 ,
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.Xr malloc 3 ,
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.Xr sysctlbyname 3
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.Sh HISTORY
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The
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.Fn getdevmajor
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function call appeared in
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.Nx 3.0 .
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