shithub: qk2

Info  •  Files  •  Log  •  Branches

sys: use fstat and avoid unaligned data access on stack

--- a/sys.c

+++ b/sys.c

@@ -332,13 +332,14 @@

 vlong

 flen(int fd)

 {

-	uchar bs[1024];

+	Dir *d;

+	vlong sz;

-	if(fstat(fd, bs, sizeof bs) < 0){

-		fprint(2, "flen:fstat: %r\n");

-		return -1;

-	}

-	return *((vlong *)(bs+2+2+4+1+4+8+4+4+4));	/* length[8] */

+	sz = -1;

+	if((d = dirfstat(fd)) != nil)

+		sz = d->length;

+	free(d);

+	return sz;

 }

 void