1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * 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 #ifndef lint 35 static char sccsid[] = "@(#)misc.c 5.1 (Berkeley) 9/19/91"; 36 #endif /* not lint */ 37 38 #include <sys/types.h> 39 #include <unistd.h> 40 #include <errno.h> 41 #include <stdlib.h> 42 #include <stdio.h> 43 #include <string.h> 44 #include "extern.h" 45 46 void 47 get(fd, off, p, len) 48 int fd; 49 off_t off; 50 void *p; 51 size_t len; 52 { 53 int rbytes; 54 55 if (lseek(fd, off, SEEK_SET) < 0) 56 err("%s: %s", special, strerror(errno)); 57 if ((rbytes = read(fd, p, len)) < 0) 58 err("%s: %s", special, strerror(errno)); 59 if (rbytes != len) 60 err("%s: short read (%d, not %d)", special, rbytes, len); 61 } 62 63 #if __STDC__ 64 #include <stdarg.h> 65 #else 66 #include <varargs.h> 67 #endif 68 69 void 70 #if __STDC__ 71 err(const char *fmt, ...) 72 #else 73 err(fmt, va_alist) 74 char *fmt; 75 va_dcl 76 #endif 77 { 78 va_list ap; 79 #if __STDC__ 80 va_start(ap, fmt); 81 #else 82 va_start(ap); 83 #endif 84 (void)fprintf(stderr, "dumplfs: "); 85 (void)vfprintf(stderr, fmt, ap); 86 va_end(ap); 87 (void)fprintf(stderr, "\n"); 88 exit(1); 89 /* NOTREACHED */ 90 } 91