s, a string, a command understandable by the operating system
Outputs:
an integer, the exit status of the command if it returned normally; it is an integer, normally zero, in the range from 0 to 255. If the command was interrupted, then 1000 plus the number of the signal is returned. A return value of -1 indicates an error in creating a new process or in discovering its status. A return value of 255 may indicate that the shell to run the command was not found.
Description
The process is run in the same process group, so signals invoked by control characters at the terminal will go both to it and to Macaulay2.