Fix BUFSIZ v LINE_MAX issue

CHANGES

@@ -8,6 +8,7 @@ OpenLDAP 2.3.28 Release
 	Added ldapsearch bad filter pattern check (ITS#4647)
 	Fixed slapd global access controls initialization (ITS#4654)
 	Fixed slapd setting c_sasl_bindop only on SASL binds
+	Fixed slapd max line length issue (ITS#4651)
 	Fixed slapd return code not being propagated (ITS#4565)
 	Fixed slapd integerBitAndMatch (ITS#4672)
 	Fixed slapd syncrepl modrdn new superior (ITS#4695)

include/ac/stdlib.h

@@ -35,4 +35,14 @@
 #	define EXIT_FAILURE 1
 #endif
 
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+
+#if defined(LINE_MAX) 
+#	define AC_LINE_MAX LINE_MAX
+#else
+#	define AC_LINE_MAX 2048 /* POSIX MIN */
+#endif
+
 #endif /* _AC_STDLIB_H */

libraries/libldap/init.c

@@ -116,7 +116,7 @@ static const struct ol_attribute {
 static void openldap_ldap_init_w_conf(
 	const char *file, int userconf )
 {
-	char linebuf[ LINE_MAX ];
+	char linebuf[ AC_LINE_MAX ];
 	FILE *fp;
 	int i;
 	char *cmd, *opt;

servers/slapd/config.c

@@ -1120,7 +1120,7 @@ slap_cf_aux_table_parse( const char *word, void *dst, slap_cf_aux_table *tab0, L
 int
 slap_cf_aux_table_unparse( void *src, struct berval *bv, slap_cf_aux_table *tab0 )
 {
-	char buf[BUFSIZ], *ptr;
+	char buf[AC_LINE_MAX], *ptr;
 	slap_cf_aux_table *tab;
 	struct berval tmp;
 
@@ -1307,7 +1307,7 @@ strtok_quote( char *line, char *sep, char **quote_ptr )
 	return( tmp );
 }
 
-static char	buf[BUFSIZ];
+static char	buf[AC_LINE_MAX];
 static char	*line;
 static size_t lmax, lcur;
 
@@ -1315,7 +1315,7 @@ static size_t lmax, lcur;
 	do { \
 		size_t len = strlen( buf ); \
 		while ( lcur + len + 1 > lmax ) { \
-			lmax += BUFSIZ; \
+			lmax += AC_LINE_MAX; \
 			line = (char *) ch_realloc( line, lmax ); \
 		} \
 		strcpy( line + lcur, buf ); \