flock: use more useful example in flock.1

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 6ae584bd4c6c0e4cfafbbb8e9edeed71579adec5..00ea9b99be94711ea504fd053a123cb2f5b9d476 100644 (file)
--- 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