Record Case Detail

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

 pwd: /out/package
ppid: 4316
   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 $ main.c:397:21: runtime error: index -1 out of bounds for type 'char [1024]'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior main.c:397:21 in 
=================================================================
==4317==ERROR: AddressSanitizer: stack-buffer-underflow on address 0x7ffc4195661f at pc 0x00000051e419 bp 0x7ffc419565f0 sp 0x7ffc419565e8
READ of size 1 at 0x7ffc4195661f thread T0
    #0 0x51e418  (/out/package/mumsh_memory_check+0x51e418)
    #1 0x7f1e1fc15b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #2 0x41ccf9  (/out/package/mumsh_memory_check+0x41ccf9)

Address 0x7ffc4195661f is located in stack of thread T0 at offset 31 in frame
    #0 0x515d6f  (/out/package/mumsh_memory_check+0x515d6f)

  This frame has 10 object(s):
    [32, 1056) 'line' <== Memory access at offset 31 underflows this variable
    [1184, 1192) 'fd_pipe'
    [1216, 1224) 'fd_pwd'
    [1248, 2272) 'pre_dir'
    [2400, 3424) 'remain'
    [3552, 4576) 'temp'
    [4704, 5728) 'buf'
    [58

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