1 files changed, 33 insertions, 0 deletions
diff --git a/src/fd.c b/src/fd.c
new file mode 100644
index 0000000..c3cc0f7
--- /dev/null
+++ b/src/fd.c
@@ -0,0 +1,33 @@
+#include <fcntl.h>
+#include "fd.h"
+
+/**
+  * @file fd.c
+  * @autor djb
+  * @ref qmail
+  * @brief file descriptor manipulation
+  */
+
+int close(int __fd);  /* we won't use unistd.h here */
+
+int fd_copy(int to,int from)
+{
+  if (to == from) return 0;
+  if (fcntl(from,F_GETFL,0) == -1) return -1;
+  close(to);
+  if (fcntl(from,F_DUPFD,to) == -1) return -1;
+  return 0;
+}
+
+int fd_move(int to,int from)
+{
+  if (to == from) return 0;
+  if (fd_copy(to,from) == -1) return -1;
+  close(from);
+  return 0;
+}
+
+int fd_coe(int fd) 
+{
+  return fcntl(fd,F_SETFD,1); 
+}