Record Case Detail

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 pwd: /out/package
ppid: 98043
   1: WRITELN echo 123 > 1.txt
   2: WRITELN echo 321 > 2.txt
   3: WRITELN cat < 1.txt | cat >> 2.txt
   4: WRITELN cat 1.txt
   5: WRITELN cat 2.txt
   6: WRITELN ls
   7: 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 $ mumsh $ mumsh $ mumsh $ 123
mumsh $ 321
123
mumsh $ 1.txt
2.txt
driver
mumsh
mumsh_memory_check
mumsh $ 
=================================================================
==98044==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 49152 byte(s) in 6 object(s) allocated from:
    #0 0x4dcdd0  (/out/package/mumsh_memory_check+0x4dcdd0)
    #1 0x518ef2  (/out/package/mumsh_memory_check+0x518ef2)
    #2 0x5184a4  (/out/package/mumsh_memory_check+0x5184a4)
    #3 0x7f8a67393b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

Indirect leak of 49152 byte(s) in 6 object(s) allocated from:
    #0 0x4dcdd0  (/out/package/mumsh_memory_check+0x4dcdd0)
    #1 0x5190a8  (/out/package/mumsh_memory_check+0x5190a8)
    #2 0x5184a4  (/out/package/mumsh_memory_check+0x5184a4)
    #3 0x7f8a67393b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

Indirect leak of 40960 byte(s) in 5 object(s) allocated from:
    #0 0x4dcdd0  (/out/package/mumsh_memory_check+0x4dcdd0)
    #1 0x519098  (/out/package/mumsh_memory_check+0x519

mumsh $ mumsh $ mumsh $ mumsh $ 123
mumsh $ 321
123
mumsh $ 1.txt
2.txt
driver
mumsh
mumsh_memory_check
mumsh $ exit

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JOJ Answer