pwd: /out/package
ppid: 751
   1: WRITELN echo 123 > 1.txt
   2: WRITELN "echo" "<1.'txt'" < 1.txt > "2.""txt"
   3: WRITELN cat 1.txt
   4: WRITELN cat 2.txt
   5: WRITELN ls
   6: WRITELN exit
exit: 0

mumsh $ mumsh $ mumsh $ 123
mumsh $ <1.'txt'
mumsh $ 1.txt
2.txt
driver
mumsh
mumsh_memory_check
mumsh $ exit

mumsh $ mumsh $ mumsh $ 123
mumsh $ <1.'txt'
mumsh $ 1.txt
2.txt
driver
mumsh
mumsh_memory_check
mumsh $ exit