1 files changed, 9 insertions, 10 deletions

diff --git a/mktag.c b/mktag.c
index 23288781cf..f1598dbd21 100644
--- a/mktag.c
+++ b/mktag.c
@@ -45,7 +45,7 @@ static int verify_tag(char *buffer, unsigned long size)
 	unsigned char sha1[20];
 	const char *object, *type_line, *tag_line, *tagger_line;
 
-	if (size < 64 || size > MAXSIZE-1)
+	if (size < 64)
 		return -1;
 	buffer[size] = 0;
 
@@ -105,8 +105,8 @@ static int verify_tag(char *buffer, unsigned long size)
 
 int main(int argc, char **argv)
 {
-	unsigned long size;
-	char buffer[MAXSIZE];
+	unsigned long size = 4096;
+	char *buffer = malloc(size);
 	unsigned char result_sha1[20];
 
 	if (argc != 1)
@@ -114,13 +114,9 @@ int main(int argc, char **argv)
 
 	setup_git_directory();
 
-	// Read the signature
-	size = 0;
-	for (;;) {
-		int ret = xread(0, buffer + size, MAXSIZE - size);
-		if (ret <= 0)
-			break;
-		size += ret;
+	if (read_pipe(0, &buffer, &size)) {
+		free(buffer);
+		die("could not read from stdin");
 	}
 
 	// Verify it for some basic sanity: it needs to start with "object <sha1>\ntype\ntagger "
@@ -129,6 +125,9 @@ int main(int argc, char **argv)
 
 	if (write_sha1_file(buffer, size, tag_type, result_sha1) < 0)
 		die("unable to write tag file");
+
+	free(buffer);
+
 	printf("%s\n", sha1_to_hex(result_sha1));
 	return 0;
 }