edit/edcore: Save the terminal restore callback once and reuse.

This fixes elves#706.

program: Add Go version to output of -buildinfo.

edit/edcore: More log message.

fix overflows on req arg in ioctl

Signed-off-by: Shengjing Zhu <i@zhsj.me>

fix overflows on req arg in ioctl

Signed-off-by: Shengjing Zhu <i@zhsj.me>

Fix element assignment of upvalues.

This fixes elves#564.

Fix AsyncReader for go 1.9.

With the introduction of the builtin poller, the standard library manages
nonblockingness of fds itself. As a result, a Read on a nonblocking fd can
still block (presumably, since the builtin poller when make fds nonblocking on
its own, it will emulate blocking IO even if the fd itself is nonblocking).

The solution is to simply use the read syscall to read from a nonblocking fd,
thus avoiding the blocking IO emulation behavior of the standard library.

Fix AsyncReader for go 1.9.

With the introduction of the builtin poller, the standard library manages
nonblockingness of fds itself. As a result, a Read on a nonblocking fd can
still block (presumably, since the builtin poller when make fds nonblocking on
its own, it will emulate blocking IO even if the fd itself is nonblocking).

The solution is to simply use the read syscall to read from a nonblocking fd,
thus avoiding the blocking IO emulation behavior of the standard library.

Remove embedded: from embedded namespace. Remove "acme:".

eval: In gen-embedded-module, handle backtick correctly.