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, 13 insertions, 20 deletions

diff --git a/src/boot/bootctl.c b/src/boot/bootctl.c
index 359e273fd9..51b51c4254 100644
--- a/src/boot/bootctl.c
+++ b/src/boot/bootctl.c
@@ -32,17 +32,14 @@
 #include "util.h"
 #include "utf8.h"
 
-static int help(void) {
-
+static void help(void) {
         printf("%s [OPTIONS...] COMMAND ...\n\n"
                "Query or change firmware and boot manager settings.\n\n"
                "  -h --help              Show this help\n"
                "     --version           Show package version\n"
                "Commands:\n"
-               "  status                 Show current boot settings\n",
-               program_invocation_short_name);
-
-        return 0;
+               "  status                 Show current boot settings\n"
+               , program_invocation_short_name);
 }
 
 static int parse_argv(int argc, char *argv[]) {
@@ -51,8 +48,8 @@ static int parse_argv(int argc, char *argv[]) {
         };
 
         static const struct option options[] = {
-                { "help",                no_argument,       NULL, 'h'                     },
-                { "version",             no_argument,       NULL, ARG_VERSION             },
+                { "help",        no_argument, NULL, 'h'          },
+                { "version",     no_argument, NULL, ARG_VERSION  },
                 {}
         };
 
@@ -61,12 +58,13 @@ static int parse_argv(int argc, char *argv[]) {
         assert(argc >= 0);
         assert(argv);
 
-        while ((c = getopt_long(argc, argv, "+h", options, NULL)) >= 0) {
+        while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
 
                 switch (c) {
 
                 case 'h':
-                        return help();
+                        help();
+                        return 0;
 
                 case ARG_VERSION:
                         puts(PACKAGE_STRING);
@@ -79,7 +77,6 @@ static int parse_argv(int argc, char *argv[]) {
                 default:
                         assert_not_reached("Unhandled option");
                 }
-        }
 
         return 1;
 }
@@ -268,21 +265,17 @@ static int bootctl_main(int argc, char *argv[]) {
 }
 
 int main(int argc, char *argv[]) {
-        int r, retval = EXIT_FAILURE;
+        int r;
 
         log_parse_environment();
         log_open();
 
         r = parse_argv(argc, argv);
-        if (r < 0)
-                goto finish;
-        else if (r == 0) {
-                retval = EXIT_SUCCESS;
+        if (r <= 0)
                 goto finish;
-        }
 
         r = bootctl_main(argc, argv);
-        retval = r < 0 ? EXIT_FAILURE : r;
-finish:
-        return retval;
+
+ finish:
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 }