1 /*
2 * Copyright (C) 1993-2001 by Darren Reed.
3 *
4 * See the IPFILTER.LICENCE file for details on licencing.
5 *
6 * $Id: getline.c,v 1.3 2001/06/09 17:09:24 darrenr Exp $
7 */
8
9 #include <stdio.h>
10 #if !defined(__SVR4) && !defined(__GNUC__)
11 #include <strings.h>
12 #endif
13 #include <string.h>
14 #include "ipf.h"
15
16
17 /*
18 * Similar to fgets(3) but can handle '\\' and NL is converted to NUL.
19 * Returns NULL if error occured, EOF encounterd or input line is too long.
20 */
21 char *
getaline(char * str,size_t size,FILE * file,int * linenum)22 getaline(char *str, size_t size, FILE *file, int *linenum)
23 {
24 char *p;
25 int s, len;
26
27 do {
28 for (p = str, s = size; ; p += (len - 1), s -= (len - 1)) {
29 /*
30 * if an error occured, EOF was encounterd, or there
31 * was no room to put NUL, return NULL.
32 */
33 if (fgets(p, s, file) == NULL)
34 return (NULL);
35 len = strlen(p);
36 if (p[len - 1] != '\n') {
37 p[len] = '\0';
38 break;
39 }
40 (*linenum)++;
41 p[len - 1] = '\0';
42 if (len < 2 || p[len - 2] != '\\')
43 break;
44 else
45 /*
46 * Convert '\\' to a space so words don't
47 * run together
48 */
49 p[len - 2] = ' ';
50 }
51 } while (*str == '\0');
52 return (str);
53 }
54