git

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#include "git-compat-util.h"
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#include "nonblock.h"
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#ifdef O_NONBLOCK
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int enable_pipe_nonblock(int fd)
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{
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	int flags = fcntl(fd, F_GETFL);
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	if (flags < 0)
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		return -1;
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	flags |= O_NONBLOCK;
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	return fcntl(fd, F_SETFL, flags);
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}
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#elif defined(GIT_WINDOWS_NATIVE)
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#include "win32.h"
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int enable_pipe_nonblock(int fd)
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{
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	HANDLE h = (HANDLE)_get_osfhandle(fd);
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	DWORD mode;
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	DWORD type = GetFileType(h);
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	if (type == FILE_TYPE_UNKNOWN && GetLastError() != NO_ERROR) {
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		errno = EBADF;
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		return -1;
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	}
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	if (type != FILE_TYPE_PIPE)
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		BUG("unsupported file type: %lu", type);
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	if (!GetNamedPipeHandleState(h, &mode, NULL, NULL, NULL, NULL, 0)) {
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		errno = err_win_to_posix(GetLastError());
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		return -1;
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	}
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	mode |= PIPE_NOWAIT;
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	if (!SetNamedPipeHandleState(h, &mode, NULL, NULL)) {
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		errno = err_win_to_posix(GetLastError());
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		return -1;
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	}
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	return 0;
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}
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#else
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int enable_pipe_nonblock(int fd UNUSED)
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{
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	errno = ENOSYS;
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	return -1;
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}
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#endif
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