1 files changed, 21 insertions, 0 deletions
diff --git a/util.c b/util.c
new file mode 100644
index 0000000..3907dad
--- /dev/null
+++ b/util.c
@@ -0,0 +1,21 @@
+#include <unistd.h>
+
+#include "util.h"
+
+ssize_t loop_write(int fd, const void *b, size_t l) {
+    ssize_t t = 0;
+    while (l) {
+        ssize_t r;
+
+        if ((r = write(fd, b, l)) < 0)
+            return t == 0 ? r : t;
+        else if (r == 0)
+            return t;
+
+        b += r;
+        l -= r;
+        t += r;
+    }
+
+    return t;
+}