1 files changed, 68 insertions, 0 deletions
diff --git a/src/lib9/open.c b/src/lib9/open.c
new file mode 100644
index 000000000..4ac81ba5f
--- /dev/null
+++ b/src/lib9/open.c
@@ -0,0 +1,68 @@
+/*
+Plan 9 from User Space src/lib9/open.c
+http://code.swtch.com/plan9port/src/tip/src/lib9/open.c
+
+Copyright 2001-2007 Russ Cox.  All Rights Reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#define _GNU_SOURCE	/* for Linux O_DIRECT */
+#include <u.h>
+#define NOPLAN9DEFINES
+#include <sys/file.h>
+#include <libc.h>
+#ifndef O_DIRECT
+#define O_DIRECT 0
+#endif
+
+int
+p9open(char *name, int mode)
+{
+	int rclose;
+	int fd, umode, rdwr;
+
+	rdwr = mode&3;
+	umode = rdwr;
+	rclose = mode&ORCLOSE;
+	mode &= ~(3|ORCLOSE);
+	if(mode&OTRUNC){
+		umode |= O_TRUNC;
+		mode ^= OTRUNC;
+	}
+	if(mode&ODIRECT){
+		umode |= O_DIRECT;
+		mode ^= ODIRECT;
+	}
+	if(mode&OAPPEND){
+		umode |= O_APPEND;
+		mode ^= OAPPEND;
+	}
+	if(mode){
+		werrstr("mode 0x%x not supported", mode);
+		return -1;
+	}
+	umode |= O_BINARY;
+	fd = open(name, umode);
+	if(fd >= 0){
+		if(rclose)
+			remove(name);
+	}
+	return fd;
+}