背景

是咁的，有時ssh去server run d batch job會唔記得入screen先，冇用screen又如果熄左terminal既話個batch job會terminate左，見batch job行到一半又唔想term左佢重新係screen入行過面。

reptyr可以將個process塞返入其他tty，例如screen或者tmux度。

安裝

裝screen同埋reptyr。

# pacman -S screen reptyr

搵PID

搵返server batch job個pid出黎，例如backup個process係叫duplicity。

$ ps -ax | grep duplicity

其實用htop都得架啦。

移個PID去其他tty

$ reptyr ${PID}，例如$ reptyr 1851

伏

不過通常會爆類似呢個error出黎

Timed out waiting for child stop.
Unable to attach to pid 10625: Operation not permitted
The kernel denied permission while attaching. If your uid matches
the target's, check the value of /proc/sys/kernel/yama/ptrace_scope.
For more information, see /etc/sysctl.d/10-ptrace.conf

意思係你個kernel冇咁permissive，有d 安全設定唔比你轉process tty，雖然明明uid一樣...

呢個時候，就要

/etc/sysctl.d/10-ptrace.conf

kernel.yama.ptrace_scope = 0

再run # sysctl -p /etc/sysctl.d/10-ptrace.conf

再黎

$ reptyr 1851

搞掂。

Protip: 唔好對住shell process (e.g. bash/zsh)用reptyr。