bins: read user args from argv[1..]; fix date year digit

exec::spawn passes C-style argv with argv[0] = the command name, but
ls, cat, mkdir, touch and rm treated argv[0] as their first user
argument.  Every path they were given resolved to the literal command
name ("ls", "mkdir", ...), so they failed silently: `mkdir .../sub`
never created the directory, `cat` printed nothing.

date formatted its last year digit as `y as u8 % 10`, which truncates
before the modulo (2026 -> 234 -> '4'), printing "2024".

Only visible now that the system image actually stages /bin — before,
/bin was empty and every command fell back to a built-in.

1 files changed, 2 insertions, 1 deletions

diff --git a/bins/mkdir/src/main.rs b/bins/mkdir/src/main.rs
index f6f7e66..82302df 100644
--- a/bins/mkdir/src/main.rs
+++ b/bins/mkdir/src/main.rs
@@ -10,7 +10,8 @@ fn panic(_info: &core::panic::PanicInfo) -> ! {
 
 #[unsafe(no_mangle)]
 pub extern "C" fn efi_main(exports: &'static rsapi::Exports, argc: usize, argv: *const rsapi::Arg) -> i32 {
-    let args = unsafe { core::slice::from_raw_parts(argv, argc) };
+    // C-style argv: argv[0] is the program name, user args start at 1.
+    let args = unsafe { core::slice::from_raw_parts(argv.add(1), argc.saturating_sub(1)) };
     if args.is_empty() { return 1; }
     let path = unsafe { core::str::from_utf8_unchecked(core::slice::from_raw_parts(args[0].ptr, args[0].len)) };
     let rc = (exports.fs_create)(rsapi::Line { ptr: path.as_ptr(), len: path.len() }, true);