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author | rgrimes <rgrimes@FreeBSD.org> | 1994-05-26 06:18:55 +0000 |
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committer | rgrimes <rgrimes@FreeBSD.org> | 1994-05-26 06:18:55 +0000 |
commit | e3cfc8ce61f788739c66445d903f8beacb40c93d (patch) | |
tree | ba7beef9ee9289c4383bad976f88710e44c98b4d /bin/ps/devname.c | |
parent | 862fdf11a2ede45dec0da01ed575525d79468981 (diff) | |
download | FreeBSD-src-e3cfc8ce61f788739c66445d903f8beacb40c93d.zip FreeBSD-src-e3cfc8ce61f788739c66445d903f8beacb40c93d.tar.gz |
BSD 4.4 Lite bin Sources
Diffstat (limited to 'bin/ps/devname.c')
-rw-r--r-- | bin/ps/devname.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/bin/ps/devname.c b/bin/ps/devname.c new file mode 100644 index 0000000..df94b91 --- /dev/null +++ b/bin/ps/devname.c @@ -0,0 +1,80 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)devname.c 8.1 (Berkeley) 5/31/93"; +#endif /* LIBC_SCCS and not lint */ + +#include <sys/types.h> + +#include <db.h> +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <paths.h> +#include <stdio.h> +#include <string.h> + +char * +devname(dev, type) + dev_t dev; + mode_t type; +{ + struct { + mode_t type; + dev_t dev; + } bkey; + static DB *db; + static int failure; + DBT data, key; + + if (!db && !failure && + !(db = dbopen(_PATH_DEVDB, O_RDONLY, 0, DB_HASH, NULL))) { + warn("warning: %s", _PATH_DEVDB); + failure = 1; + } + if (failure) + return ("??"); + + /* + * Keys are a mode_t followed by a dev_t. The former is the type of + * the file (mode & S_IFMT), the latter is the st_rdev field. Be + * sure to clear any padding that may be found in bkey. + */ + memset(&bkey, 0, sizeof(bkey)); + bkey.dev = dev; + bkey.type = type; + key.data = &bkey; + key.size = sizeof(bkey); + return ((db->get)(db, &key, &data, 0) ? "??" : (char *)data.data); +} |