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Predicate exec/1 |
execvp()
. Here are some examples:
exec(ls('-l'))
exec('/bin/ls'('-l', '/home/jan'))
Unix exec()
is the only way to start an executable file
executing. It is commonly used together with fork/1.
For example to start netscape on an URL in the background, do:
run_netscape(URL) :- ( fork(child), exec(netscape(URL)) ; true ).
Using this code, netscape remains part of the process-group of the invoking Prolog process and Prolog does not wait for netscape to terminate. The predicate wait/2 allows waiting for a child, while detach_IO/0 disconnects the child as a deamon process.