Unify parse_argv style

getopt is usually good at printing out a nice error message when
commandline options are invalid. It distinguishes between an unknown
option and a known option with a missing arg. It is better to let it
do its job and not use opterr=0 unless we actually want to suppress
messages. So remove opterr=0 in the few places where it wasn't really
useful.

When an error in options is encountered, we should not print a lengthy
help() and overwhelm the user, when we know precisely what is wrong
with the commandline. In addition, since help() prints to stdout, it
should not be used except when requested with -h or --help.

Also, simplify things here and there.

1 files changed, 6 insertions, 9 deletions

diff --git a/src/network/networkd-wait-online.c b/src/network/networkd-wait-online.c
index d588935e93..6c2fdd1b2c 100644
--- a/src/network/networkd-wait-online.c
+++ b/src/network/networkd-wait-online.c
@@ -30,17 +30,14 @@
 static bool arg_quiet = false;
 static char **arg_interfaces = NULL;
 
-static int help(void) {
-
+static void help(void) {
         printf("%s [OPTIONS...]\n\n"
                "Block until network is configured.\n\n"
                "  -h --help                 Show this help\n"
                "     --version              Print version string\n"
                "  -q --quiet                Do not show status information\n"
-               "  -i --interface=INTERFACE  Block until at least these interfaces have appeared\n",
-               program_invocation_short_name);
-
-        return 0;
+               "  -i --interface=INTERFACE  Block until at least these interfaces have appeared\n"
+               , program_invocation_short_name);
 }
 
 static int parse_argv(int argc, char *argv[]) {
@@ -62,12 +59,13 @@ static int parse_argv(int argc, char *argv[]) {
         assert(argc >= 0);
         assert(argv);
 
-        while ((c = getopt_long(argc, argv, "+hq", options, NULL)) >= 0) {
+        while ((c = getopt_long(argc, argv, "+hq", options, NULL)) >= 0)
 
                 switch (c) {
 
                 case 'h':
-                        return help();
+                        help();
+                        return 0;
 
                 case 'q':
                         arg_quiet = true;
@@ -90,7 +88,6 @@ static int parse_argv(int argc, char *argv[]) {
                 default:
                         assert_not_reached("Unhandled option");
                 }
-        }
 
         return 1;
 }