Platform: use a pfn to write and reference Darwin.write#26
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The `write` method is not properly exposed through the `unistd` module on Darwin. As a result, we need to special case macOS and pull it from the `Darwin` module.
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Pull request overview
This PR addresses a platform-specific issue where the write function is not properly exposed through the unistd module on Darwin/macOS. The solution refactors the code to use a function pointer (pfnWrite) that references the appropriate write implementation for each platform (Glibc for GNU, Darwin for macOS, and unistd for other platforms), then calls it uniformly.
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The
writemethod is not properly exposed through theunistdmodule on Darwin. As a result, we need to special case macOS and pull it from theDarwinmodule.