Record Case Detail

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

 pwd: /out/package
ppid: 4441
   1: WRITELN echo 123 > 1.txt
   2: WRITELN echo abc > > > >
   3: WRITELN echo abc > < 1.txt
   4: WRITELN echo abc > | grep abc
   5: 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 $ p1.c:235:24: runtime error: null pointer passed as argument 1, which is declared to never be null
/usr/include/string.h:137:33: note: nonnull attribute specified here
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior p1.c:235:24 in 
AddressSanitizer:DEADLYSIGNAL
=================================================================
==4446==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x0000004b209b bp 0x7ffc80602df0 sp 0x7ffc80602560 T0)
==4446==The signal is caused by a READ memory access.
==4446==Hint: address points to the zero page.
    #0 0x4b209a  (/out/package/mumsh_memory_check+0x4b209a)
    #1 0x518dd5  (/out/package/mumsh_memory_check+0x518dd5)
    #2 0x519539  (/out/package/mumsh_memory_check+0x519539)
    #3 0x5182ac  (/out/package/mumsh_memory_check+0x5182ac)
    #4 0x7f639a86fb96  (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #5 0x41cbc9  (/out/package/mumsh_memory_check+0x41cbc9)

AddressSanitizer can not provide additional info.
SUMMARY: Addres

mumsh $ mumsh $ syntax error near unexpected token `>'
mumsh $ syntax error near unexpected token `<'
mumsh $ syntax error near unexpected token `|'
mumsh $ exit

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JOJ Answer