pwd: /out/package
ppid: 6948
   1: WRITELN echo pwd > pwd
   2: WRITELN mkdir test
   3: WRITELN mv pwd test
   4: WRITELN cat test/pwd
   5: WRITELN rm -r test
   6: WRITELN exit

mumsh $ mumsh $ mumsh $ mumsh $ pwd
mumsh $ mumsh $ exit

mumsh $ mumsh $ mumsh $ mumsh $ pwd
mumsh $ mumsh $ exit