Record Case Detail

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

 pwd: /out/package
ppid: 5081
   1: WRITELN >
   2: WRITELN 1.txt echo 123
   3: WRITELN cat 1.txt
   4: WRITELN ls
   5: 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 $ /in/p1.c:57:8: runtime error: index -2 out of bounds for type 'char [1024]'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /in/p1.c:57:8 in 
=================================================================
==5082==ERROR: AddressSanitizer: stack-buffer-underflow on address 0x7ffed6c47b7e at pc 0x00000051670c bp 0x7ffed6c47b50 sp 0x7ffed6c47b48
READ of size 1 at 0x7ffed6c47b7e thread T0
    #0 0x51670b  (/out/package/mumsh_memory_check+0x51670b)
    #1 0x51faba  (/out/package/mumsh_memory_check+0x51faba)
    #2 0x7f0c6252eb96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #3 0x41d089  (/out/package/mumsh_memory_check+0x41d089)

Address 0x7ffed6c47b7e is located in stack of thread T0 at offset 30 in frame
    #0 0x51545f  (/out/package/mumsh_memory_check+0x51545f)

  This frame has 1 object(s):
    [32, 1056) 'cmdstr' <== 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 an

mumsh $ > mumsh $ 123
mumsh $ 1.txt
driver
mumsh
mumsh_memory_check
mumsh $ exit

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