[libc-commits] [libc] [libc] Add 'x' and 'e' mode support to fopen() (PR #224207)

[Jeong Jihyeon via libc-commits]

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@@ -215,7 +237,10 @@ int LinuxFile::reopen_unlocked(const char *path, const char *mode) {
     // Else the new file successfully opened, so we move it into the fd the old
     // file was using if the old fd exists.
     if (old_fd >= 0) {
-      auto dup_result = linux_syscalls::dup2(new_fd.value(), old_fd);
+      // Preserve close-on-exec atomically when replacing the old descriptor.
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JihyeonJeong129 wrote:

Thanks for the review! I've updated the code as suggested.
Please let me know if any further changes are needed.

https://github.com/llvm/llvm-project/pull/224207