Import sources from 2011-03-30 iso image

1 files changed, 107 insertions, 0 deletions

diff --git a/sys/src/ape/lib/ap/plan9/dirstat.c b/sys/src/ape/lib/ap/plan9/dirstat.c
new file mode 100755
index 000000000..f054b4f6e
--- /dev/null
+++ b/sys/src/ape/lib/ap/plan9/dirstat.c
@@ -0,0 +1,107 @@
+#include "lib.h"
+#include <string.h>
+#include <stdlib.h>
+#include "sys9.h"
+#include "dir.h"
+
+enum
+{
+	DIRSIZE	= STATFIXLEN + 16 * 4		/* enough for encoded stat buf + some reasonable strings */
+};
+
+Dir*
+_dirstat(char *name)
+{
+	Dir *d;
+	uchar *buf;
+	int n, nd, i;
+
+	nd = DIRSIZE;
+	for(i=0; i<2; i++){	/* should work by the second try */
+		d = malloc(sizeof(Dir) + BIT16SZ +nd);
+		if(d == nil)
+			return nil;
+		buf = (uchar*)&d[1];
+		n = _STAT(name, buf, BIT16SZ+nd);
+		if(n < BIT16SZ){
+			free(d);
+			return nil;
+		}
+		nd = GBIT16((uchar*)buf);	/* size needed to store whole stat buffer */
+		if(nd <= n){
+			_convM2D(buf, n, d, (char*)&d[1]);
+			return d;
+		}
+		/* else sizeof(Dir)+BIT16SZ+nd is plenty */
+		free(d);
+	}
+	return nil;
+}
+
+int
+_dirwstat(char *name, Dir *d)
+{
+	uchar *buf;
+	int r;
+
+	r = _sizeD2M(d);
+	buf = malloc(r);
+	if(buf == nil)
+		return -1;
+	_convD2M(d, buf, r);
+	r = _WSTAT(name, buf, r);
+	free(buf);
+	return r;
+}
+
+Dir*
+_dirfstat(int fd)
+{
+	Dir *d;
+	uchar *buf;
+	int n, nd, i;
+
+	nd = DIRSIZE;
+	for(i=0; i<2; i++){	/* should work by the second try */
+		d = malloc(sizeof(Dir) + nd);
+		if(d == nil)
+			return nil;
+		buf = (uchar*)&d[1];
+		n = _FSTAT(fd, buf, nd);
+		if(n < BIT16SZ){
+			free(d);
+			return nil;
+		}
+		nd = GBIT16(buf);	/* size needed to store whole stat buffer */
+		if(nd <= n){
+			_convM2D(buf, n, d, (char*)&d[1]);
+			return d;
+		}
+		/* else sizeof(Dir)+nd is plenty */
+		free(d);
+	}
+	return nil;
+}
+
+int
+_dirfwstat(int fd, Dir *d)
+{
+	uchar *buf;
+	int r;
+
+	r = _sizeD2M(d);
+	buf = malloc(r);
+	if(buf == nil)
+		return -1;
+	_convD2M(d, buf, r);
+	r = _FWSTAT(fd, buf, r);
+	free(buf);
+	return r;
+}
+
+void
+_nulldir(Dir *d)
+{
+	memset(d, ~0, sizeof(Dir));
+	d->name = d->uid = d->gid = d->muid = "";
+}