m4, 23 bytes

Result

WA

Duration

784ms

Code [DL]

m4wrap(`syscmd(`cat')')

stdin

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stdout

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stderr

strace

11    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffd07284700 /* 7 vars */) = 0
12    execve("/bin/cat", ["cat", "-"], 0x557825f18d30 /* 7 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/bin/m4", ["/usr/bin/m4", "/volume/CODE"], 0x557825f18d40 /* 7 vars */) = 0
14    execve("/bin/sh", ["sh", "-c", "cat"], 0x7ffc3cb1f900 /* 7 vars */) = 0
14    execve("/bin/cat", ["cat"], 0x5616c586ac48 /* 7 vars */) = 0
14    +++ exited with 0 +++
13    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=14, si_uid=0, si_status=0, si_utime=0, si_stime=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=0, si_stime=0} ---
11    +++ exited with 0 +++