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Eli Zaretskii authored
* src/w32.c (sys_write): Don't write to a pipe more stuff than its buffer can hold. Don't return -1 if something has been written to the pipe. Zero out 'errno' before calling '_write', to avoid returning a stale value. (Bug#22344) * src/w32proc.c (syms_of_ntproc) <w32-pipe-buffer-size>: New variable. * src/w32.c (pipe2): Use it to request a user-defined size for the pipe being created. * etc/NEWS: Mention 'w32-pipe-buffer-size'. * doc/emacs/msdos.texi (Windows Processes): Document 'w32-pipe-buffer-size'.
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