Record Case Detail

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

 pwd: /out/package
ppid: 1959
   1: WRITELN echo 123 > 1.txt
   2: WRITELN echo 222 > 2.txt
   3: WRITELN echo 321 > 4.txt
   4: WRITELN <1.txt >3.txt cat 2.txt 4.txt
   5: WRITELN cat 1.txt
   6: WRITELN cat 2.txt
   7: WRITELN cat 3.txt
   8: WRITELN cat 4.txt
   9: WRITELN ls
  10: 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 $ mumsh $ mumsh $ =================================================================
==1960==ERROR: AddressSanitizer: stack-buffer-underflow on address 0x7fff4c125b9e at pc 0x0000005234ea bp 0x7fff4c1257f0 sp 0x7fff4c1257e8
READ of size 1 at 0x7fff4c125b9e thread T0
    #0 0x5234e9  (/out/package/mumsh_memory_check+0x5234e9)
    #1 0x525e1b  (/out/package/mumsh_memory_check+0x525e1b)
    #2 0x7fecfb3e9b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #3 0x41d2c9  (/out/package/mumsh_memory_check+0x41d2c9)

Address 0x7fff4c125b9e is located in stack of thread T0 at offset 30 in frame
    #0 0x525bff  (/out/package/mumsh_memory_check+0x525bff)

  This frame has 1 object(s):
    [32, 1056) 'input' <== Memory access at offset 30 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+0x5234e9)

mumsh $ mumsh $ mumsh $ mumsh $ mumsh $ 123
mumsh $ 222
mumsh $ 222
321
mumsh $ 321
mumsh $ 1.txt
2.txt
3.txt
4.txt
driver
mumsh
mumsh_memory_check
mumsh $ exit

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JOJ Answer