# 2.11BSD#431 - /usr/src/lib/libc/gen/devname.c

##### Functions

    devname           X

       1: /*
       2:  * Copyright (c) 1989, 1993
       3:  *	The Regents of the University of California.  All rights reserved.
       4:  *
       5:  * Redistribution and use in source and binary forms, with or without
       6:  * modification, are permitted provided that the following conditions
       7:  * are met:
       8:  * 1. Redistributions of source code must retain the above copyright
       9:  *    notice, this list of conditions and the following disclaimer.
      10:  * 2. Redistributions in binary form must reproduce the above copyright
      11:  *    notice, this list of conditions and the following disclaimer in the
      12:  *    documentation and/or other materials provided with the distribution.
      13:  * 3. All advertising materials mentioning features or use of this software
      14:  *    must display the following acknowledgement:
      15:  *	This product includes software developed by the University of
      16:  *	California, Berkeley and its contributors.
      17:  * 4. Neither the name of the University nor the names of its contributors
      18:  *    may be used to endorse or promote products derived from this software
      19:  *    without specific prior written permission.
      20:  *
      21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
      22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
      25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31:  * SUCH DAMAGE.
      32:  */
      33:
      34: #if defined(LIBC_SCCS) && !defined(lint)
      35: static char sccsid[] = "@(#)devname.c	8.1.1 (2.11BSD GTE) 2/3/95";
      36: #endif /* LIBC_SCCS and not lint */
      37:
      38: #include <sys/types.h>
      39: #include <ndbm.h>
      40: #include <fcntl.h>
      41: #include <paths.h>
      42: #include <stdio.h>
      43:
      44: char *
      45: devname(dev, type)
      46:     dev_t dev;
      47:     mode_t type;
      48: {
      49:     struct {
      50:         mode_t type;
      51:         dev_t dev;
      52:     } bkey;
      53:     char    *devdb = _PATH_DEVDB;
      54:     static DBM *db;
      55:     static int failure;
      56:     datum data, key;
      57:
      58:     if (!db && !failure &&
      59:         !(db = dbm_open(devdb, O_RDONLY, 0))) {
      60:         warn("warning: %s", devdb);
      61:         failure = 1;
      62:     }
      63:     if (failure)
      64:         return("??");
      65:
      66:     /*
      67: 	 * Keys are a mode_t followed by a dev_t.  The former is the type of
      68: 	 * the file (mode & S_IFMT), the latter is the st_rdev field.  Be
      69: 	 * sure to clear any padding that may be found in bkey.
      70: 	 */
      71:     memset(&bkey, 0, sizeof(bkey));
      72:     bkey.dev = dev;
      73:     bkey.type = type;
      74:     key.dptr = (char *)&bkey;
      75:     key.dsize = sizeof(bkey);
      76:     data = dbm_fetch(db, key);
      77:     return(data.dptr == NULL ? "??" : (char *)data.dptr);
      78: }

#### Defined functions

devname defined in line 44; used 5 times

- in /usr/include/stdlib.h line 95
- in /usr/src/bin/sysctl/sysctl.c line 388
- in /usr/src/sbin/savecore/savecore.c line 62, 104
- in /usr/src/ucb/lastcomm.c line 189

#### Defined variables

sccsid defined in line 35; never used

Last modified: 1995-02-04 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 544 |