Record Case Detail

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 pwd: /out/package
ppid: 3454
   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 $ mumsh $ 123
mumsh $ .
..
1.txt
mumsh $ mumsh $ .:
driver
mumsh
mumsh_memory_check
test

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

=================================================================
==3455==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 2048 byte(s) in 2 object(s) allocated from:
    #0 0x4dd030  (/out/package/mumsh_memory_check+0x4dd030)
    #1 0x517d5e  (/out/package/mumsh_memory_check+0x517d5e)
    #2 0x515ce6  (/out/package/mumsh_memory_check+0x515ce6)
    #3 0x7fc95fa95b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

Direct leak of 2048 byte(s) in 2 object(s) allocated from:
    #0 0x4dd030  (/out/package/mumsh_memory_check+0x4dd030)
    #1 0x5169cd  (/out/package/mumsh_memory_check+0x5169cd)
    #2 0x515ce6  (/out/package/mumsh_memory_check+0x515ce6)
    #3 0x7fc95fa95b96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

SUMMARY: AddressSanitizer: 4096 byte(s) leaked in 4 allocation(s).

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