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-rw-r--r--src/contrib/getline.c60
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diff --git a/src/contrib/getline.c b/src/contrib/getline.c
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+++ b/src/contrib/getline.c
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+/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+// FreeBSD POSIX2008 getline
+#ifndef _WITH_GETLINE
+#define _WITH_GETLINE
+#endif
+
+#include "contrib/getline.h"
+
+#include <stdio.h> // getline or fgetln
+#include <stdlib.h> // free
+#include <string.h> // memcpy
+
+ssize_t knot_getline(char **lineptr, size_t *n, FILE *stream)
+{
+#ifdef HAVE_GETLINE
+ return getline(lineptr, n, stream);
+#else
+#ifdef HAVE_FGETLN
+ size_t length = 0;
+ char *buffer = fgetln(stream, &length);
+ if (buffer == NULL) {
+ return -1;
+ }
+
+ /* NOTE: Function fgetln doesn't return terminated string!
+ * Output buffer from the fgetln can't be freed.
+ */
+
+ // If the output buffer is not specified or is small, extend it.
+ if (*lineptr == NULL || *n <= length) {
+ char *tmp = realloc(*lineptr, length + 1);
+ if (tmp == NULL) {
+ return -1;
+ }
+ *lineptr = tmp;
+ *n = length + 1;
+ }
+
+ memcpy(*lineptr, buffer, length);
+ (*lineptr)[length] = '\0';
+
+ return length;
+#endif
+#endif
+}