release: rc-1.4

1 files changed, 29 insertions, 0 deletions

diff --git a/open.c b/open.c
new file mode 100644
index 0000000..7287e0e
--- /dev/null
+++ b/open.c
@@ -0,0 +1,29 @@
+/* open.c: to insulate <fcntl.h> from the rest of rc. */
+
+#include <fcntl.h>
+#include "rc.h"
+
+/* prototype for open() follows. comment out if necessary */
+
+/*extern int open(const char *, int,...);*/
+
+/*
+   Opens a file with the necessary flags. Assumes the following
+   declaration for redirtype:
+
+	enum redirtype {
+		rFrom, rCreate, rAppend, rHeredoc, rHerestring
+	};
+*/
+
+static const int mode_masks[] = {
+	/* rFrom */	O_RDONLY,
+	/* rCreate */	O_TRUNC | O_CREAT | O_WRONLY,
+	/* rAppend */	O_APPEND | O_CREAT | O_WRONLY
+};
+
+extern int rc_open(const char *name, redirtype m) {
+	if ((unsigned) m >= arraysize(mode_masks))
+		panic("bad mode passed to rc_open");
+	return open(name, mode_masks[m], 0666);
+}