1.\" $NetBSD: devname.3,v 1.12 2012/06/03 21:42:46 joerg Exp $ 2.\" 3.\" Copyright (c) 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)devname.3 8.2 (Berkeley) 4/29/95 31.\" 32.Dd June 3, 2012 33.Dt DEVNAME 3 34.Os 35.Sh NAME 36.Nm devname 37.Nd get device name 38.Sh LIBRARY 39.Lb libc 40.Sh SYNOPSIS 41.In stdlib.h 42.In sys/stat.h 43.Ft char * 44.Fn devname "dev_t dev" "mode_t type" 45.Sh DESCRIPTION 46The 47.Fn devname 48function returns a pointer to the name of the block or character 49device in 50.Dq Pa /dev 51with a device number of 52.Fa dev , 53and a file type matching the one encoded in 54.Fa type 55which must be one of S_IFBLK or S_IFCHR. 56If no device matches the specified values, or no information is 57available, 58.Dv NULL 59is returned. 60.Pp 61The traditional display for applications when no device is 62found is the string 63.Dq ?? . 64.Sh FILES 65.Bl -tag -width /var/run/dev.cdb -compact 66.It Pa /var/run/dev.cdb 67Device database file. 68.El 69.Sh SEE ALSO 70.Xr stat 2 , 71.Xr dev_mkdb 8 72.Sh HISTORY 73The 74.Nm devname 75function call appeared in 76.Bx 4.4 . 77