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79. system


Execute a shell command


Integer_Type system (String_Type cmd)


The system function may be used to execute the string expression cmd in an inferior shell. This function is an interface to the C system function which returns an implementation-defined result. On Linux, it returns 127 if the inferior shell could not be invoked, -1 if there was some other error, otherwise it returns the return code for cmd.


    define dir ()
       () = system ("DIR");
displays a directory listing of the current directory under MSDOS or VMS.

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