setuidgid: Update --help output.

* src/setuidgid.c (usage): Describe -g GID[,GID1...] option.
Mention that USER may be a numeric ID or a user name.

1 files changed, 7 insertions, 3 deletions

diff --git a/src/setuidgid.c b/src/setuidgid.c
index 6e3bd92c1..b3f4653c3 100644
--- a/src/setuidgid.c
+++ b/src/setuidgid.c
@@ -50,19 +50,23 @@ usage (int status)
   else
     {
       printf (_("\
-Usage: %s USERNAME COMMAND [ARGUMENT]...\n\
+Usage: %s OPTION USER COMMAND [ARGUMENT]...\n\
   or:  %s OPTION\n\
 "),
               program_name, program_name);
 
       fputs (_("\
-Drop any supplemental groups, assume the user-ID and group-ID of\n\
-the specified USERNAME, and run COMMAND with any specified ARGUMENTs.\n\
+Drop any supplemental groups, assume the user-ID and group-ID of the specified\n\
+USER (numeric ID or user name), and run COMMAND with any specified ARGUMENTs.\n\
 Exit with status 111 if unable to assume the required user and group ID.\n\
 Otherwise, exit with the exit status of COMMAND.\n\
 This program is useful only when run by root (user ID zero).\n\
 \n\
 "), stdout);
+      fputs (_("\
+  -g GID[,GID1...]  also set the primary group-ID to the numeric GID, and\n\
+                    (if specified) supplemental group IDs to GID1, ...\n\
+"), stdout);
       fputs (HELP_OPTION_DESCRIPTION, stdout);
       fputs (VERSION_OPTION_DESCRIPTION, stdout);
       emit_bug_reporting_address ();