Open dirs with O_RDONLY

af093136 · Silas Boyd-Wickizer · 5c31e01c · af093136
--- a/bin/mktree.cc
+++ b/bin/mktree.cc
@@ -13,7 +13,7 @@ dolevel(int fd, int branch, int depth)
      if (mkdirat(fd, &name) < 0)
        die("mkdirat");
-      int nfd = openat(fd, &name, O_RDWR);
+      int nfd = openat(fd, &name, O_RDONLY);
      if (nfd < 0)
        die("openat");
      dolevel(nfd, branch, depth-1);
@@ -36,7 +36,7 @@ main(int ac, char **av)
  if (mkdir(dir))
    die("mkdir");
-  int fd = open(dir, O_RDWR);
+  int fd = open(dir, O_RDONLY);
  if (fd < 0)
    die("open");