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Paul Eggert authored
(create_temp_file): New function, with the temp-file-creation part of the old Fcall_process_region. Use Fcopy_sequence to create the temp file name, rather than alloca + build_string, for simplicity. Don't bother to block input around the temp file creation; shouldn't be needed. Simplify use of mktemp. Use record_unwind_protect immediately after creating the temp file; this closes an unlikely race where the temp file was not removed. Use memcpy rather than an open-coded loop. (Fcall_process_region): Use the new function. If the input is empty, redirect from /dev/null rather than from a newly created empty temp file; this avoids unnecessary file system traffic.
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