1 files changed, 15 insertions, 0 deletions
diff --git a/src/libstddjb/fd_copy.c b/src/libstddjb/fd_copy.c
new file mode 100644
index 0000000..b051eaf
--- /dev/null
+++ b/src/libstddjb/fd_copy.c
@@ -0,0 +1,15 @@
+/* ISC license. */
+
+#include <unistd.h>
+#include <errno.h>
+#include <skalibs/djbunix.h>
+
+int fd_copy (int to, int from)
+{
+  register int r ;
+  if (to == from) return (errno = EINVAL, -1) ;
+  do
+    r = dup2(from, to) ;
+  while ((r == -1) && (errno == EINTR)) ;
+  return r ;
+}