1 files changed, 25 insertions, 0 deletions
diff --git a/src/libstddjb/fd_cat.c b/src/libstddjb/fd_cat.c
new file mode 100644
index 0000000..5682f02
--- /dev/null
+++ b/src/libstddjb/fd_cat.c
@@ -0,0 +1,25 @@
+/* ISC license. */
+
+#include <skalibs/iobuffer.h>
+#include <skalibs/djbunix.h>
+
+int fd_cat (int from, int to)
+{
+  iobuffer b ;
+  unsigned int n = 0 ;
+  if (!iobuffer_init(&b, from, to)) return -1 ;
+  for (;;)
+  {
+    register int r = iobuffer_fill(&b) ;
+    if (r < 0) goto err ;
+    else if (!r) break ;
+    if (!iobuffer_flush(&b)) goto err ;
+    n += r ;
+  }
+  iobuffer_finish(&b) ;
+  return n ;
+
+ err:
+  iobuffer_finish(&b) ;
+  return -1 ;
+}