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-rw-r--r--compat/getline.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/compat/getline.c b/compat/getline.c
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+++ b/compat/getline.c
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+/*
+ * dhcpcd - DHCP client daemon
+ * Copyright (c) 2006-2009 Roy Marples <roy@marples.name>
+ * All rights reserved
+
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "getline.h"
+
+/* Redefine a small buffer for our simple text config files */
+#undef BUFSIZ
+#define BUFSIZ 128
+
+ssize_t
+getline(char ** __restrict buf, size_t * __restrict buflen,
+ FILE * __restrict fp)
+{
+ size_t bytes, newlen;
+ char *newbuf, *p;
+
+ if (buf == NULL || buflen == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+ if (*buf == NULL)
+ *buflen = 0;
+
+ bytes = 0;
+ do {
+ if (feof(fp))
+ break;
+ if (*buf == NULL || bytes != 0) {
+ newlen = *buflen + BUFSIZ;
+ newbuf = realloc(*buf, newlen);
+ if (newbuf == NULL)
+ return -1;
+ *buf = newbuf;
+ *buflen = newlen;
+ }
+ p = *buf + bytes;
+ memset(p, 0, BUFSIZ);
+ if (fgets(p, BUFSIZ, fp) == NULL)
+ break;
+ bytes += strlen(p);
+ } while (bytes == 0 || *(*buf + (bytes - 1)) != '\n');
+ if (bytes == 0)
+ return -1;
+ return bytes;
+}