6b288cfa64
(devname() returned "??" when the lookup failed, but callers expected it to return NULL). This was fixed in Lite2, but until recently the changes were only merged into devname.3. A day or two after devname.c was fixed, devname.3 was made inconsistent again by backing out most of the Lite2 changes.
70 lines
2.6 KiB
Groff
70 lines
2.6 KiB
Groff
.\" Copyright (c) 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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.\" @(#)devname.3 8.2 (Berkeley) 4/29/95
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.\" $Id: devname.3,v 1.5 1999/07/20 20:48:40 nik Exp $
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.\"
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.Dd April 29, 1995
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.Dt DEVNAME 3
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.Os BSD 4.4
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.Sh NAME
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.Nm devname
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.Nd get device name
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.Sh SYNOPSIS
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.Fd #include <stdlib.h>
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.Ft char *
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.Fn devname "dev_t dev" "mode_t type"
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.Sh DESCRIPTION
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The
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.Fn devname
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function returns a pointer to the name of the block or character
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device in
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.Dq Pa /dev
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with a device number of
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.Fa dev ,
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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 S_IFBLK or S_IFCHR.
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If no device matches the specified values, or no information is
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available, NULL is returned.
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.Pp
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The traditional display for applications when no device is
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found is the string
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.Dq ?? .
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.Sh SEE ALSO
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.Xr stat 2 ,
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.Xr dev_mkdb 8
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.Sh HISTORY
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The
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.Fn devname
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function call appeared in
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.Bx 4.4 .
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