don't permit O_WRONLY

SCCS-vsn: lib/libc/db/btree/bt_open.c 5.21

diff --git a/usr/src/lib/libc/db/btree/bt_open.c b/usr/src/lib/libc/db/btree/bt_open.c
index e9c5b1e..7b8c17a 100644 (file)
--- a/usr/src/lib/libc/db/btree/bt_open.c
+++ b/usr/src/lib/libc/db/btree/bt_open.c
@@ -9,7 +9,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)

-static char sccsid[] = "@(#)bt_open.c  5.20 (Berkeley) %G%";
+static char sccsid[] = "@(#)bt_open.c  5.21 (Berkeley) %G%";

 #endif /* LIBC_SCCS and not lint */
 
 /*
 #endif /* LIBC_SCCS and not lint */
 
 /*


@@ -151,14 +151,25 @@ __bt_open(fname, flags, mode, openinfo)
         * open a backing temporary file.  Otherwise, it's a disk-based tree.
         */
        if (fname) {
         * open a backing temporary file.  Otherwise, it's a disk-based tree.
         */
        if (fname) {

+               switch(flags & O_ACCMODE) {
+               case O_RDONLY:
+                       SET(t, BTF_RDONLY);
+                       break;
+               case O_RDWR:
+                       break;
+               case O_WRONLY:
+               default:
+                       goto einval;
+               }
+               

 #define        USEFLAGS \
 #define        USEFLAGS \

-       (O_CREAT|O_EXCL|O_EXLOCK|O_RDONLY|O_RDWR|O_SHLOCK|O_TRUNC|O_WRONLY)
+       (O_CREAT|O_EXCL|O_EXLOCK|O_RDONLY|O_RDWR|O_SHLOCK|O_TRUNC)

                if ((t->bt_fd = open(fname, flags & USEFLAGS, mode)) < 0)
                        goto err;
                if ((t->bt_fd = open(fname, flags & USEFLAGS, mode)) < 0)
                        goto err;

-               if ((flags & O_ACCMODE) == O_RDONLY)
-                       SET(t, BTF_RDONLY);

 
        } else {
 
        } else {

+               if ((flags & O_ACCMODE) != O_RDWR)
+                       goto einval;

                if ((t->bt_fd = tmp()) == -1)
                        goto err;
                SET(t, BTF_INMEM);
                if ((t->bt_fd = tmp()) == -1)
                        goto err;
                SET(t, BTF_INMEM);