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/escape/escape.c b/src/escape/escape.c
index ba2fb4789f..f2a0721861 100644
--- a/src/escape/escape.c
+++ b/src/escape/escape.c
@@ -37,8 +37,7 @@ static const char *arg_suffix = NULL;
 static const char *arg_template = NULL;
 static bool arg_path = false;
 
-static int help(void) {
-
+static void help(void) {
         printf("%s [OPTIONS...] [NAME...]\n\n"
                "Show system and user paths.\n\n"
                "  -h --help               Show this help\n"
@@ -47,10 +46,8 @@ static int help(void) {
                "     --template=TEMPLATE  Insert strings as instance into template\n"
                "  -u --unescape           Unescape strings\n"
                "  -m --mangle             Mangle strings\n"
-               "  -p --path               When escaping/unescaping assume the string is a path\n",
-               program_invocation_short_name);
-
-        return 0;
+               "  -p --path               When escaping/unescaping assume the string is a path\n"
+               , program_invocation_short_name);
 }
 
 static int parse_argv(int argc, char *argv[]) {
@@ -77,12 +74,13 @@ static int parse_argv(int argc, char *argv[]) {
         assert(argc >= 0);
         assert(argv);
 
-        while ((c = getopt_long(argc, argv, "hump", options, NULL)) >= 0) {
+        while ((c = getopt_long(argc, argv, "hump", options, NULL)) >= 0)
 
                 switch (c) {
 
                 case 'h':
-                        return help();
+                        help();
+                        return 0;
 
                 case ARG_VERSION:
                         puts(PACKAGE_STRING);
@@ -127,7 +125,6 @@ static int parse_argv(int argc, char *argv[]) {
                 default:
                         assert_not_reached("Unhandled option");
                 }
-        }
 
         if (optind >= argc) {
                 log_error("Not enough arguments.");