Utilities: Specify mode argument when creating files with dd

When using open() with the O_CREAT flag we must specify the mode
argument. Otherwise we'll incorrectly set the new file's mode
to whatever is left on the stack:

courage:~ $ dd if=/dev/zero of=test count=1
1+0 blocks in
1+0 blocks out
512 bytes copied.
courage:~ $ ls -l test
--w-r-x---   1    anon   users        512   2021-05-08 01:29:52  test
courage:~ $

This also specifies the mode argument when opening files for
reading. This however is harmless because in those cases the argument
is ignored.

fixes #6923

1 files changed, 1 insertions, 1 deletions

diff --git a/Userland/Utilities/dd.cpp b/Userland/Utilities/dd.cpp
index 3eb58b486e..18b1736cd7 100644
--- a/Userland/Utilities/dd.cpp
+++ b/Userland/Utilities/dd.cpp
@@ -58,7 +58,7 @@ static int handle_io_file_arguments(int& fd, int flags, const char* argument)
         return -1;
     }
 
-    fd = open(value.characters(), flags);
+    fd = open(value.characters(), flags, 0666);
     if (fd == -1) {
         fprintf(stderr, "Unable to open: %s\n", value.characters());
         return -1;