1 /* $FreeBSD: head/tools/tools/bus_autoconf/bus_load_file.c 255122 2013-09-01 14:06:57Z ian $ */ 2 3 /*- 4 * Copyright (c) 2011 Hans Petter Selasky. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <stdio.h> 29 #include <stdint.h> 30 #include <stdlib.h> 31 #include <fcntl.h> 32 #include <err.h> 33 #include <sysexits.h> 34 #include <unistd.h> 35 36 #include "bus_load_file.h" 37 38 void 39 load_file(const char *fname, uint8_t **pptr, uint32_t *plen) 40 { 41 uint8_t *ptr; 42 ssize_t len; 43 off_t off; 44 int f; 45 46 f = open(fname, O_RDONLY); 47 if (f < 0) 48 err(EX_NOINPUT, "Cannot open file '%s'", fname); 49 50 off = lseek(f, 0, SEEK_END); 51 if (off < 0) { 52 err(EX_NOINPUT, "Cannot seek to " 53 "end of file '%s'", fname); 54 } 55 56 if (lseek(f, 0, SEEK_SET) < 0) { 57 err(EX_NOINPUT, "Cannot seek to " 58 "beginning of file '%s'", fname); 59 } 60 61 len = off; 62 if (len != off) 63 err(EX_NOINPUT, "File '%s' is too big", fname); 64 65 ptr = malloc(len); 66 if (ptr == NULL) 67 errx(EX_SOFTWARE, "Out of memory"); 68 69 if (read(f, ptr, len) != len) 70 err(EX_NOINPUT, "Cannot read all data"); 71 72 close(f); 73 74 *pptr = ptr; 75 *plen = len; 76 } 77