[PATCH] usertools/hugepages: show usage if no action specified

[Thomas Monjalon]

Previously, the script was doing nothing if no argument was provided.

If neither show, mount/unmount, clear/reserve are specified,
it is assumed that the user does not know how to use the script.
So the usage is printed and an error code is used in exit.
The user will understand something is wrong,
and can recall the script with the option -h to get more information.

Signed-off-by: Thomas Monjalon <thomas at monjalon.net>
---
 usertools/dpdk-hugepages.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/usertools/dpdk-hugepages.py b/usertools/dpdk-hugepages.py
index a22d504d3a..823cfcf185 100755
--- a/usertools/dpdk-hugepages.py
+++ b/usertools/dpdk-hugepages.py
@@ -272,6 +272,10 @@ def main():
         args.reserve = args.setup
         args.mount = True
 
+    if not (args.show or args.mount or args.unmount or args.clear or args.reserve):
+        parser.print_usage()
+        sys.exit(1)
+
     if args.pagesize:
         pagesize_kb = get_memsize(args.pagesize)
     else:
-- 
2.36.1