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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 1.5 2007/05/17 08:19:00 swildner Exp $
51 .Fn devname "dev_t dev" "mode_t type"
53 .Fn devname_r "dev_t dev" "mode_t type" "char *buf" "size_t len"
57 .Fn fdevname_r "int fd" "char *buf" "size_t len"
63 functions return a pointer to the name of the block or character
66 with a device number of
68 and a file type matching the one encoded in
74 To find the right name,
78 first search the device database created by
80 if that fails, it will format the information encapsulated in
84 in a human-readable format.
90 function obtain the device name directly from a file descriptor
91 pointing to a character device.
96 returns a pointer to an internal static object; thus, subsequent calls will
97 modify the same buffer.
101 avoid this problem by taking a buffer
112 functions return a pointer to the name of the block or character
115 if successful; otherwise
122 is set to indicate the error.
126 function returns 0 if successful.
127 Otherwise an error number is returned.
133 functions may fail and return the following error codes:
138 is not a valid open file descriptor.
142 must belong to a character device.
147 function may fail and return the following error code:
152 argument is smaller than the length of the string to be returned.
171 functions appeared in