The example in the man page does not prevent concurrent execution, as it obtains a shared lock. More useful is taking an exclusive lock, i.e. remove "-s". Additionally, IMO most people want the script to exit when the lock cannot be acquired, so adding "-n". diff --git a/sys-utils/flock.1 b/sys-utils/flock.1 index 6ae584b..00ea9b9 100644 --- a/sys-utils/flock.1 +++ b/sys-utils/flock.1 @@ -51,7 +51,7 @@ used the following manner: .PP \fC( .br - flock -s 9 + flock -n 9 .br # ... commands executed under lock ... .br -- To unsubscribe from this list: send the line "unsubscribe util-linux-ng" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
