pwd: /out/package
ppid: 90456
   1: WRITELN echo 123 > 1.txt
   2: WRITELN head < 1.txt
   3: WRITELN diff -y - 1.txt < 1.txt
   4: WRITELN ls
   5: WRITELN exit

mumsh $ mumsh $ 123
mumsh $ 123								123
mumsh $ 1.txt
driver
mumsh
mumsh_memory_check
mumsh $ exit

mumsh $ mumsh $ 123
mumsh $ 123								123
mumsh $ 1.txt
driver
mumsh
mumsh_memory_check
mumsh $ exit