const runtime._FD_CLOEXEC 2 uses runtime (current package) os_unix.go#L13: _FD_CLOEXEC = 1 os_unix.go#L18: fcntl(fd, _F_SETFD, _FD_CLOEXEC)
The pages are generated with Golds v0.7.6. (GOOS=linux GOARCH=amd64)