Record Case Detail

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 pwd: /out/package
ppid: 63
   1: WRITELN sleep 10 | echo 123
   2: CTRL+C
Scan child pids of ppid: 63
SIGINT
Send signal 2 to pid: 63
Scan child pids of ppid: 64
Send signal 2 to pid: 64
Scan child pids of ppid: 65
Send signal 2 to pid: 65
Scan child pids of ppid: 66
Send signal 2 to pid: 66
   3: WRITELN echo success
   4: WRITELN exit
exit: 1

Your answer may be identical to the JOJ answer in the first several lines.

However, the main problem you meet now is Runtime Error. And the exit code of your program is 1, which should be 0.

Please double check your code to solve this problem and try again.

mumsh $ 
mumsh $ success
mumsh $ 
=================================================================
==64==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 2000 byte(s) in 1 object(s) allocated from:
    #0 0x4dcbb0  (/out/package/mumsh_memory_check+0x4dcbb0)
    #1 0x51d355  (/out/package/mumsh_memory_check+0x51d355)
    #2 0x7fcf96b8bb96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

Direct leak of 24 byte(s) in 1 object(s) allocated from:
    #0 0x4dd030  (/out/package/mumsh_memory_check+0x4dd030)
    #1 0x51ae34  (/out/package/mumsh_memory_check+0x51ae34)
    #2 0x51fcbd  (/out/package/mumsh_memory_check+0x51fcbd)
    #3 0x7fcf96b8bb96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

Indirect leak of 200 byte(s) in 1 object(s) allocated from:
    #0 0x4dcdd8  (/out/package/mumsh_memory_check+0x4dcdd8)
    #1 0x5170d0  (/out/package/mumsh_memory_check+0x5170d0)
    #2 0x51fcbd  (/out/package/mumsh_memory_check+0x51fcbd)
    #3 0x7fcf96b8bb96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

Indirect leak of 20

mumsh $ 123

mumsh $ success
mumsh $ exit

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JOJ Answer