wake, 60 bytes

Result

AC

Duration

916ms

Code [DL]

all:$<
(.*T)(\D{50}) (.*):$1$2T$3
(.*K) (.*):$1K$2
(.*):"$1"

stdin

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                                    K             

stdout

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                                    KKKKKKKKKKKKKT

stderr

strace

11    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffe009eafb0 /* 9 vars */) = 0
12    execve("/bin/cat", ["cat", "-"], 0x561e3fddfd70 /* 9 vars */) = 0
12    +++ exited with 0 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
13    execve("/usr/local/ruby-2.6.3/bin/ruby", ["/usr/local/ruby-2.6.3/bin/ruby", "/root/waker.rb", "/volume/CODE"], 0x561e40ce1068 /* 9 vars */) = 0
13    +++ exited with 0 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13, si_uid=0, si_status=0, si_utime=7, si_stime=5} ---
11    +++ exited with 0 +++