1.\" Copyright (c) 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)devname.3 8.2 (Berkeley) 4/29/95 33.\" $FreeBSD: src/lib/libc/gen/devname.3,v 1.7.2.7 2003/03/15 15:11:05 trhodes Exp $ 34.\" $DragonFly: src/lib/libc/gen/devname.3,v 1.2 2003/06/17 04:26:42 dillon Exp $ 35.\" 36.Dd July 18, 1999 37.Dt DEVNAME 3 38.Os 39.Sh NAME 40.Nm devname 41.Nd get device name 42.Sh LIBRARY 43.Lb libc 44.Sh SYNOPSIS 45.In sys/stat.h 46.In stdlib.h 47.Ft char * 48.Fn devname "dev_t dev" "mode_t type" 49.Sh DESCRIPTION 50The 51.Fn devname 52function returns a pointer to the name of the block or character 53device in 54.Pa /dev 55with a device number of 56.Fa dev , 57and a file type matching the one encoded in 58.Fa type 59which must be one of 60.Dv S_IFBLK 61or 62.Dv S_IFCHR . 63To find the right name, 64.Fn devname 65first searches the device database created by 66.Xr dev_mkdb 8 ; 67if that fails, it asks the kernel via the 68.Va kern.devname 69sysctl. 70If it was still unable to come up with a suitable name, 71it will format the information encapsulated in 72.Fa dev 73and 74.Fa type 75in a human-readable format. 76.Sh SEE ALSO 77.Xr stat 2 , 78.Xr dev_mkdb 8 79.Sh HISTORY 80The 81.Fn devname 82function appeared in 83.Bx 4.4 . 84.Sh BUGS 85The 86.Fn devname 87function returns a pointer to an internal static object; 88thus, subsequent calls will modify the same buffer. 89