1 files changed, 17 insertions, 0 deletions
diff --git a/src/libstddjb/fd_copy2.c b/src/libstddjb/fd_copy2.c
new file mode 100644
index 0000000..5537329
--- /dev/null
+++ b/src/libstddjb/fd_copy2.c
@@ -0,0 +1,17 @@
+/* ISC license. */
+
+#include <unistd.h>
+#include <errno.h>
+#include <skalibs/djbunix.h>
+
+int fd_copy2 (int to1, int from1, int to2, int from2)
+{
+  if ((to1 == from2) || (to2 == from1)) return (errno = EINVAL, -1) ;
+  if (fd_copy(to1, from1) == -1) return -1 ;
+  if (fd_copy(to2, from2) == -1)
+  {
+    if (to1 != from1) fd_close(to1) ;
+    return -1 ;
+  }
+  return 0 ;
+}