Record Case Detail

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

 pwd: /out/package
ppid: 25666
   1: WRITELN > abc | | grep 123
   2: 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 $ /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 
=================================================================
==25667==ERROR: AddressSanitizer: stack-buffer-underflow on address 0x7ffcb9894d1e at pc 0x00000051672c bp 0x7ffcb9894cf0 sp 0x7ffcb9894ce8
READ of size 1 at 0x7ffcb9894d1e thread T0
    #0 0x51672b  (/out/package/mumsh_memory_check+0x51672b)
    #1 0x51fcca  (/out/package/mumsh_memory_check+0x51fcca)
    #2 0x7ff010b87b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #3 0x41d0a9  (/out/package/mumsh_memory_check+0x41d0a9)

Address 0x7ffcb9894d1e is located in stack of thread T0 at offset 30 in frame
    #0 0x51547f  (/out/package/mumsh_memory_check+0x51547f)

  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 a

mumsh $ error: missing program
mumsh $ exit

Notes

Stderr

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Your Answer

JOJ Answer