Record Case Detail

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 pwd: /out/package
ppid: 4121
   1: WRITELN mkdir test
   2: WRITELN cd test
   3: WRITELN echo 123 > 1.txt
   4: WRITELN cat 1.txt
   5: WRITELN ls -a
   6: WRITELN cd ..
   7: WRITELN ls -R
   8: WRITELN cat test/1.txt
   9: 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 $ =================================================================
==4122==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60c000000238 at pc 0x000000499c0c bp 0x7ffe1888d750 sp 0x7ffe1888cf00
READ of size 103 at 0x60c000000238 thread T0
    #0 0x499c0b  (/out/package/mumsh_memory_check+0x499c0b)
    #1 0x528df5  (/out/package/mumsh_memory_check+0x528df5)
    #2 0x526274  (/out/package/mumsh_memory_check+0x526274)
    #3 0x525e5c  (/out/package/mumsh_memory_check+0x525e5c)
    #4 0x523966  (/out/package/mumsh_memory_check+0x523966)
    #5 0x51685c  (/out/package/mumsh_memory_check+0x51685c)
    #6 0x7fdc61643b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #7 0x41d169  (/out/package/mumsh_memory_check+0x41d169)

0x60c000000238 is located 0 bytes to the right of 120-byte region [0x60c0000001c0,0x60c000000238)
allocated by thread T0 here:
    #0 0x4dd020  (/out/package/mumsh_memory_check+0x4dd020)
    #1 0x7fdc616a1b8b  (/lib/x86_64-linux-gnu/libc.so.6+0x7fb8b)
    #2 0x41d13

mumsh $ mumsh $ mumsh $ mumsh $ 123
mumsh $ .
..
1.txt
mumsh $ mumsh $ .:
driver
mumsh
mumsh_memory_check
test

./test:
1.txt
mumsh $ 123
mumsh $ exit

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JOJ Answer