Import sources from 2011-03-30 iso image

1 files changed, 24 insertions, 0 deletions

diff --git a/sys/src/ape/lib/ap/plan9/dup.c b/sys/src/ape/lib/ap/plan9/dup.c
new file mode 100755
index 000000000..37883be52
--- /dev/null
+++ b/sys/src/ape/lib/ap/plan9/dup.c
@@ -0,0 +1,24 @@
+#include "lib.h"
+#include <unistd.h>
+#include <errno.h>
+
+int
+dup(int oldd)
+{
+	return fcntl(oldd, F_DUPFD, 0);
+}
+
+int
+dup2(int oldd, int newd)
+{
+	int n;
+
+	if(newd < 0 || newd >= OPEN_MAX){
+		errno = EBADF;
+		return -1;
+	}
+	if(oldd == newd && _fdinfo[newd].flags&FD_ISOPEN)
+		return newd;
+	close(newd);
+	return fcntl(oldd, F_DUPFD, newd);
+}