[all-commits] [llvm/llvm-project] 6eff53: [libc][stdio] implement rename via SYS_renameat2 (...

[Nick Desaulniers via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6eff53b4f07c1d8f6ae271254499ec087f40cc83
      https://github.com/llvm/llvm-project/commit/6eff53b4f07c1d8f6ae271254499ec087f40cc83
  Author: Nick Desaulniers <nickdesaulniers at users.noreply.github.com>
  Date:   2024-03-21 (Thu, 21 Mar 2024)

  Changed paths:
    M libc/src/stdio/linux/rename.cpp
    M libc/test/src/stdio/rename_test.cpp

  Log Message:
  -----------
  [libc][stdio] implement rename via SYS_renameat2 (#86140)

SYS_rename may be unavailable on architectures such as aarch64 and
riscv.
rename can be implemented in terms of SYS_rename, SYS_renameat, or
SYS_renameat2. I don't have a full picture of the history here, but it
seems
that SYS_renameat might also be unavailable on some platforms.

`man 2 rename` mentions that SYS_renameat2 was added in Linux 3.15. We
don't
need to support such ancient kernel versions prior.

Link: #84980
Link: #85068



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