1 files changed, 59 insertions, 0 deletions
diff --git a/src/blind-repeat.c b/src/blind-repeat.c
new file mode 100644
index 0000000..367d976
--- /dev/null
+++ b/src/blind-repeat.c
@@ -0,0 +1,59 @@
+/* See LICENSE file for copyright and license details. */
+#include "stream.h"
+#include "util.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+
+USAGE("(count | 'inf') file")
+
+int
+main(int argc, char *argv[])
+{
+	struct stream stream;
+	size_t count = 0, ptr;
+	ssize_t r;
+	char buf[BUFSIZ];
+	int inf = 0;
+
+	ENOFLAGS(argc != 2);
+
+	if (!strcmp(argv[0], "inf"))
+		inf = 1;
+	else
+		count = etozu_arg("the count", argv[0], 0, SIZE_MAX);
+
+	if (inf)
+		einf_check_fd(STDOUT_FILENO, "<stdout>");
+
+	stream.file = argv[1];
+	stream.fd = eopen(stream.file, O_RDONLY);
+	einit_stream(&stream);
+	if (count > SIZE_MAX / stream.frames)
+		eprintf("%s: video is too long\n", stream.file);
+	stream.frames *= count;
+	fprint_stream_head(stdout, &stream);
+	efflush(stdout, "<stdout>");
+
+	while (inf || count--) {
+		posix_fadvise(stream.fd, stream.headlen, 0, POSIX_FADV_SEQUENTIAL);
+		for (ptr = stream.headlen;; ptr += (size_t)r) {
+			r = pread(stream.fd, buf, sizeof(buf), ptr);
+			if (r < 0)
+				eprintf("pread %s:", stream.file);
+			if (r == 0)
+				break;
+			if (writeall(STDOUT_FILENO, buf, (size_t)r)) {
+				if (!inf || errno != EPIPE)
+					eprintf("write <stdout>:");
+				return 0;
+			}
+		}
+	}
+
+	close(stream.fd);
+	return 0;
+}