1 files changed, 23 insertions, 0 deletions
diff --git a/util/sbase/libutil/concat.c b/util/sbase/libutil/concat.c
new file mode 100644
index 00000000..2e9aa521
--- /dev/null
+++ b/util/sbase/libutil/concat.c
@@ -0,0 +1,23 @@
+/* See LICENSE file for copyright and license details. */
+#include <unistd.h>
+
+#include "../util.h"
+
+int
+concat(int f1, const char *s1, int f2, const char *s2)
+{
+	char buf[BUFSIZ];
+	ssize_t n;
+
+	while ((n = read(f1, buf, sizeof(buf))) > 0) {
+		if (writeall(f2, buf, n) < 0) {
+			weprintf("write %s:", s2);
+			return -2;
+		}
+	}
+	if (n < 0) {
+		weprintf("read %s:", s1);
+		return -1;
+	}
+	return 0;
+}