Record Case Detail

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

 pwd: /out/package
ppid: 12141
   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
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 $ AddressSanitizer:DEADLYSIGNAL
=================================================================
==12147==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x0000004b209b bp 0x7ffe0b2e3b50 sp 0x7ffe0b2e32c0 T0)
==12147==The signal is caused by a READ memory access.
==12147==Hint: address points to the zero page.
AddressSanitizer:DEADLYSIGNAL
=================================================================
==12148==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x0000004b209b bp 0x7ffe0b2e3b50 sp 0x7ffe0b2e32c0 T0)
==12148==The signal is caused by a READ memory access.
==12148==Hint: address points to the zero page.
    #0 0x4b209a  (/out/package/mumsh_memory_check+0x4b209a)
    #1 0x515ee1  (/out/package/mumsh_memory_check+0x515ee1)
    #2 0x517525  (/out/package/mumsh_memory_check+0x517525)
    #3 0x51707e  (/out/package/mumsh_memory_check+0x51707e)
    #4 0x517629  (/out/package/mumsh_memory_check+0x517629)
    #5 0x51759d  (/out/package/mumsh_m

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

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