Record Case Detail

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 pwd: /out/package
ppid: 19412
   1: WRITELN /bin/ls &
   2: WRITELN sleep 0.2
   3: WRITELN /bin/ls | cat &
   4: WRITELN sleep 0.2
   5: WRITELN exit

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

However, you will still get Wrong Answer because the complete output may be longer and there might be errors in the future lines.

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

mumsh $ [1] /bin/ls &
mumsh $ driver
mumsh
mumsh_memory_check
mumsh $ [2] /bin/ls | cat &
mumsh $ driver
mumsh
mumsh_memory_check

=================================================================
==19416==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 3072 byte(s) in 3 object(s) allocated from:
    #0 0x4dcf90  (/out/package/mumsh_memory_check+0x4dcf90)
    #1 0x517f6b  (/out/package/mumsh_memory_check+0x517f6b)
    #2 0x515941  (/out/package/mumsh_memory_check+0x515941)
    #3 0x7f2f554fab96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

Direct leak of 3072 byte(s) in 3 object(s) allocated from:
    #0 0x4dcf90  (/out/package/mumsh_memory_check+0x4dcf90)
    #1 0x517ff3  (/out/package/mumsh_memory_check+0x517ff3)
    #2 0x515941  (/out/package/mumsh_memory_check+0x515941)
    #3 0x7f2f554fab96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

Direct leak of 32 byte(s) in 2 object(s) allocated from:
    #0 0x4dcf90  (/out/package/mumsh_memory_check+0x4dcf90)
    #1 0x5157a7  (/out/package/mumsh_memory_ch

mumsh $ [1] /bin/ls &
mumsh $ driver
mumsh
mumsh_memory_check
mumsh $ [2] /bin/ls | cat &
mumsh $ driver
mumsh
mumsh_memory_check
mumsh $ exit

Notes

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JOJ Answer