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 extern char *special; 45 #if __STDC__ 46 #include <stdarg.h> 47 #else 48 #include <varargs.h> 49 #endif 50 51 void 52 #if __STDC__ 53 err(const int fatal, const char *fmt, ...) 54 #else 55 err(fmt, va_alist) 56 char *fmt; 57 va_dcl 58 #endif 59 { 60 va_list ap; 61 #if __STDC__ 62 va_start(ap, fmt); 63 #else 64 va_start(ap); 65 #endif 66 (void)fprintf(stderr, "%s: ", special); 67 (void)vfprintf(stderr, fmt, ap); 68 va_end(ap); 69 (void)fprintf(stderr, " %s\n", strerror(errno)); 70 if (fatal) 71 exit(1); 72 } 73 74 void 75 get(fd, off, p, len) 76 int fd; 77 off_t off; 78 void *p; 79 size_t len; 80 { 81 int rbytes; 82 83 if (lseek(fd, off, SEEK_SET) < 0) 84 err(1, "%s: %s", special, strerror(errno)); 85 if ((rbytes = read(fd, p, len)) < 0) 86 err(1, "%s: %s", special, strerror(errno)); 87 if (rbytes != len) 88 err(1, "%s: short read (%d, not %d)", special, rbytes, len); 89 } 90 91