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if
Langue: en
Version: 148562 (fedora - 04/07/09)
Section: 1 (Commandes utilisateur)
Sommaire
NAME
if - conditionally execute a commandSynopsis
if CONDITION; COMMANDS_TRUE...; [else; COMMANDS_FALSE...;] endDescription
if will execute the command CONDITION. If the condition's exit status is 0, the commands COMMANDS_TRUE will execute. If the exit status is not 0 and else is given, COMMANDS_FALSE will be executed.In order to use the exit status of multiple commands as the condition of an if block, use begin; ...; end and the short circuit commands and and or.
The exit status of the last foreground command to exit can always be accessed using the $status variable.
Example
if test -f foo.txt echo foo.txt exists else echo foo.txt does not exist end
will print foo.txt exists if the file foo.txt exists and is a regular file, otherwise it will print foo.txt does not exist.
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