Import sources from 2011-03-30 iso image

1 files changed, 62 insertions, 0 deletions

diff --git a/sys/src/ape/lib/ap/plan9/open.c b/sys/src/ape/lib/ap/plan9/open.c
new file mode 100755
index 000000000..1cfe0d6b5
--- /dev/null
+++ b/sys/src/ape/lib/ap/plan9/open.c
@@ -0,0 +1,62 @@
+#include <errno.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include "lib.h"
+#include <sys/stat.h>
+#include "sys9.h"
+
+/*
+ * O_NOCTTY has no effect
+ */
+int
+open(const char *path, int flags, ...)
+{
+	int n;
+	long f;
+	int mode;
+	Fdinfo *fi;
+	va_list va;
+	struct stat sbuf;
+
+	f = flags&O_ACCMODE;
+	if(flags&O_CREAT){
+		if(access(path, 0) >= 0){
+			if(flags&O_EXCL){
+				errno = EEXIST;
+				return -1;
+			}else{
+				if((flags&O_TRUNC)&&(flags&(O_RDWR|O_WRONLY)))
+					f |= 16;
+				n = _OPEN(path, f);
+			}
+		}else{
+			va_start(va, flags);
+			mode = va_arg(va, int);
+			va_end(va);
+			n = _CREATE(path, f, mode&0777);
+		}
+		if(n < 0)
+			_syserrno();
+	}else{
+		if((flags&O_TRUNC)&&(flags&(O_RDWR|O_WRONLY)))
+			f |= 16;
+		n = _OPEN(path, f);
+		if(n < 0)
+			_syserrno();
+	}
+	if(n >= 0){
+		fi = &_fdinfo[n];
+		fi->flags = FD_ISOPEN;
+		fi->oflags = flags&(O_ACCMODE|O_NONBLOCK|O_APPEND);
+		fi->uid = -2;
+		fi->gid = -2;
+		fi->name = malloc(strlen(path)+1);
+		if(fi->name)
+			strcpy(fi->name, path);
+		if(fi->oflags&O_APPEND)
+			_SEEK(n, 0, 2);
+	}
+	return n;
+}