2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
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14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
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33 * $FreeBSD: src/lib/libc/gen/devname.c,v 1.2.2.2 2001/07/31 20:10:19 tmm Exp $
34 * $DragonFly: src/lib/libc/gen/devname.c,v 1.6 2005/04/26 16:59:56 joerg Exp $
36 * @(#)devname.c 8.2 (Berkeley) 4/29/95
39 #include <sys/types.h>
51 xdevname(dev_t dev, mode_t type)
61 if (!db && !failure &&
62 !(db = dbopen(_PATH_DEVDB, O_RDONLY, 0, DB_HASH, NULL))) {
63 warn("warning: %s", _PATH_DEVDB);
70 * Keys are a mode_t followed by a dev_t. The former is the type of
71 * the file (mode & S_IFMT), the latter is the st_rdev field. Be
72 * sure to clear any padding that may be found in bkey.
74 memset(&bkey, 0, sizeof(bkey));
78 key.size = sizeof(bkey);
79 return ((db->get)(db, &key, &data, 0) ? NULL : (char *)data.data);
83 devname_r(dev_t dev, mode_t type, char *buf, size_t len)
87 /* First check the DB file. */
88 r = xdevname(dev, type);
94 /* Finally just format it */
95 if (minor(dev) > 255) {
96 snprintf(buf, len, "#%c%d:0x%x",
97 (type & S_IFMT) == S_IFCHR ? 'C' : 'B',
98 major(dev), minor(dev));
100 snprintf(buf, len, "#%c%d:%d",
101 (type & S_IFMT) == S_IFCHR ? 'C' : 'B',
102 major(dev), minor(dev));
108 devname(dev_t dev, mode_t type)
110 static char buf[30]; /* XXX: pick up from <sys/conf.h> */
112 strlcpy(buf, devname_r(dev, type, buf, sizeof(buf)), sizeof(buf));