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system args

Gives args to the shell (sh) as input, just as if it had been typed as a command from a terminal. 

Expect waits until the shell terminates.  The return status from sh is handled the same way that exec handles its return status. 

In contrast to exec which redirects stdin and stdout to the script, system performs no redirection (other than that indicated by the string itself).  Thus, it is possible to use programs which must talk directly to /dev/tty.  For the same reason, the results of system are not recorded in the log. 


This material is excerpted from the O'Reilly book "Exploring Expect" by Don Libes, and can also be found in the manpage on many UNIX platforms.

 

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