[all-commits] [llvm/llvm-project] 23552f: [libc] Acquire the lock for scanf files (#67357)

[michaelrj-google via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 23552fe22047f47f22c959579a3799530ef2a405
      https://github.com/llvm/llvm-project/commit/23552fe22047f47f22c959579a3799530ef2a405
  Author: michaelrj-google <71531609+michaelrj-google at users.noreply.github.com>
  Date:   2023-09-25 (Mon, 25 Sep 2023)

  Changed paths:
    M libc/src/stdio/scanf_core/vfscanf_internal.h

  Log Message:
  -----------
  [libc] Acquire the lock for scanf files (#67357)

When creating the new scanf reader design, I forgot to add back the
calls to flockfile and funlockfile in vfscanf_internal. This patch fixes
that, and also changes the system file version to use the normal
variants since ungetc_unlocked isn't always available.