minix/lib/libc/gen/devname.3

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.\" $NetBSD: devname.3,v 1.12 2012/06/03 21:42:46 joerg Exp $
.\"
.\" Copyright (c) 1993
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.\" @(#)devname.3 8.2 (Berkeley) 4/29/95
.\"
.Dd June 3, 2012
.Dt DEVNAME 3
.Os
.Sh NAME
.Nm devname
.Nd get device name
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In stdlib.h
.In sys/stat.h
.Ft char *
.Fn devname "dev_t dev" "mode_t type"
.Sh DESCRIPTION
The
.Fn devname
function returns a pointer to the name of the block or character
device in
.Dq Pa /dev
with a device number of
.Fa dev ,
and a file type matching the one encoded in
.Fa type
which must be one of S_IFBLK or S_IFCHR.
If no device matches the specified values, or no information is
available,
.Dv NULL
is returned.
.Pp
The traditional display for applications when no device is
found is the string
.Dq ?? .
.Sh FILES
.Bl -tag -width /var/run/dev.cdb -compact
.It Pa /var/run/dev.cdb
Device database file.
.El
.Sh SEE ALSO
.Xr stat 2 ,
.Xr dev_mkdb 8
.Sh HISTORY
The
.Nm devname
function call appeared in
.Bx 4.4 .