/ process_args: display usage when stdin was not supplied

when user invokes without supplying stdin, we should display help, rather than crash
smemsh · Jul 2, 2024 · 8101d20 · 8101d20
1 parent 761d649
commit 8101d20
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/field b/field
@@ -177,6 +177,7 @@ def process_args():
     addflag (p, 'N', 'noendrec', "skip ors after last record was emitted")
     addflag (p, 'l', 'flushrecs', "do individual writes every record")
 
+    if not args: usagex("must supply args on stdin")
     args, left = p.parse_known_args(args)
 
     n = len(left)