Linux Certif

Toute la documentation sur la certification Linux LPI

while

NAME

while - perform a command multiple times

Synopsis

while CONDITION; COMMANDS...; end

Description

The while builtin causes fish to continually execute CONDITION and execute COMMANDS as long as CONDITION returned with status 0. If CONDITION is false on the first time, COMMANDS will not be executed at all. Hints: use begin; ...; end for complex conditions; more complex control can be achieved with while true containing a break.

Example

while test -f foo.txt; echo file exists; sleep 10; end

causes fish to print the line 'file exists' at 10 second intervals as long as the file foo.txt exists.