Record Case Detail

This function is in beta test. Please help improve it in the issues here.

 pwd: /out/package
ppid: 23212
   1: WRITELN echo 123 > 1.txt
   2: WRITELN "echo" "<1.'txt'" < 1.txt > "2.""txt"
   3: WRITELN cat 1.txt
   4: WRITELN cat 2.txt
   5: WRITELN ls
   6: 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 $ =================================================================
==23213==ERROR: AddressSanitizer: stack-buffer-underflow on address 0x7ffe3a0a0eff at pc 0x00000051fe5f bp 0x7ffe3a0a0490 sp 0x7ffe3a0a0488
READ of size 1 at 0x7ffe3a0a0eff thread T0
    #0 0x51fe5e  (/out/package/mumsh_memory_check+0x51fe5e)
    #1 0x525e9a  (/out/package/mumsh_memory_check+0x525e9a)
    #2 0x7fe68542ab96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #3 0x41d2c9  (/out/package/mumsh_memory_check+0x41d2c9)

Address 0x7ffe3a0a0eff is located in stack of thread T0 at offset 31 in frame
    #0 0x525bff  (/out/package/mumsh_memory_check+0x525bff)

  This frame has 1 object(s):
    [32, 1056) 'input' <== Memory access at offset 31 underflows this variable
HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
      (longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-underflow (/out/package/mumsh_memory_check+0x51fe5e) 
Shadow bytes a

mumsh $ mumsh $ mumsh $ 123
mumsh $ <1.'txt'
mumsh $ 1.txt
2.txt
driver
mumsh
mumsh_memory_check
mumsh $ exit

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JOJ Answer