Annotation of src/lib/libc/gen/devname.3, Revision 1.11
1.11 ! agc 1: .\" $NetBSD: devname.3,v 1.10 2003/04/16 13:34:36 wiz Exp $
1.2 cgd 2: .\"
1.1 cgd 3: .\" Copyright (c) 1993
4: .\" The Regents of the University of California. All rights reserved.
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1.11 ! agc 14: .\" 3. Neither the name of the University nor the names of its contributors
1.1 cgd 15: .\" may be used to endorse or promote products derived from this software
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1.4 perry 30: .\" @(#)devname.3 8.2 (Berkeley) 4/29/95
1.1 cgd 31: .\"
1.4 perry 32: .Dd April 29, 1995
1.1 cgd 33: .Dt DEVNAME 3
1.6 garbled 34: .Os
1.1 cgd 35: .Sh NAME
36: .Nm devname
37: .Nd get device name
1.5 perry 38: .Sh LIBRARY
39: .Lb libc
1.1 cgd 40: .Sh SYNOPSIS
1.10 wiz 41: .In stdlib.h
42: .In sys/stat.h
1.1 cgd 43: .Ft char *
44: .Fn devname "dev_t dev" "mode_t type"
45: .Sh DESCRIPTION
46: The
47: .Fn devname
48: function returns a pointer to the name of the block or character
49: device in
50: .Dq Pa /dev
51: with a device number of
52: .Fa dev ,
53: and a file type matching the one encoded in
54: .Fa type
55: which must be one of S_IFBLK or S_IFCHR.
1.7 simonb 56: The device name is cached so that multiple calls with the same
57: .Fa dev
58: and
59: .Fa type
60: do not require additional queries of the device database file.
1.1 cgd 61: If no device matches the specified values, or no information is
1.9 wiz 62: available,
63: .Dv NULL
64: is returned.
1.4 perry 65: .Pp
66: The traditional display for applications when no device is
67: found is the string
68: .Dq ?? .
1.7 simonb 69: .Sh FILES
70: .Bl -tag -width /var/run/dev.db -compact
71: .It Pa /var/run/dev.db
72: Device database file.
73: .El
1.1 cgd 74: .Sh SEE ALSO
75: .Xr stat 2 ,
76: .Xr dev_mkdb 8
77: .Sh HISTORY
78: The
79: .Nm devname
80: function call appeared in
81: .Bx 4.4 .
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