1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)devname.c 5.11 (Berkeley) 02/08/91"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/types.h> 13 #include <fcntl.h> 14 #include <ndbm.h> 15 #include <stdio.h> 16 #include <paths.h> 17 18 char * 19 devname(dev) 20 dev_t dev; 21 { 22 static DBM *db; 23 static int failure; 24 datum dp, key; 25 26 if (!db && !failure && !(db = dbm_open(_PATH_DEVDB, O_RDONLY, 0))) { 27 (void)fprintf(stderr, 28 "ps: no device database %s\n", _PATH_DEVDB); 29 failure = 1; 30 } 31 if (failure) 32 return("??"); 33 34 key.dptr = (char *)&dev; 35 key.dsize = sizeof(dev); 36 dp = dbm_fetch(db, key); 37 return(dp.dptr ? dp.dptr : "??"); 38 } 39