1 /* 2 * Copyright (c) 1994 Christos Zoulas 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 Christos Zoulas. 16 * 4. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static char *rcsid = "$Id: util.c,v 1.4 2005/05/16 03:12:59 deraadt Exp $"; 34 #endif 35 36 #include <err.h> 37 #include <stdlib.h> 38 #include <string.h> 39 40 #include "util.h" 41 42 /* emalloc(): 43 * Error checked malloc 44 */ 45 void * 46 emalloc(size_t s) 47 { 48 void *ptr = malloc(s); 49 if (ptr == NULL) 50 err(1, "%s", ""); 51 return ptr; 52 } 53 54 55 /* erealloc(): 56 * Error checked realloc 57 */ 58 void * 59 erealloc(void *p, size_t s) 60 { 61 void *ptr = realloc(p, s); 62 if (ptr == NULL) 63 err(1, "%s", ""); 64 return ptr; 65 } 66 67 68 /* getline(): 69 * Read a line from a file parsing continuations ending in \ 70 * and eliminating trailing newlines. 71 */ 72 char * 73 getline(FILE *fp, size_t *size) 74 { 75 size_t s, len = 0; 76 char *buf = NULL, *ptr; 77 int cnt = 1; 78 79 while (cnt) { 80 if ((ptr = fgetln(fp, &s)) == NULL) { 81 *size = len; 82 return buf; 83 } 84 if (ptr[s - 1] == '\n') /* the newline may be missing at EOF */ 85 s--; /* forget newline */ 86 if (s && (cnt = (ptr[s - 1] == '\\'))) /* check for \\ */ 87 s--; /* forget \\ */ 88 89 buf = erealloc(buf, len + s + 1); 90 memcpy(buf + len, ptr, s); 91 len += s; 92 buf[len] = '\0'; 93 } 94 *size = len; 95 return buf; 96 } 97