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authorZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2014-08-02 11:12:21 -0400
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2014-08-03 21:46:07 -0400
commit601185b43da638b1c74153deae01dbd518680889 (patch)
treeb4f1bc609e57e542a03ca00553098eabbb3b196b /src/login/loginctl.c
parent75cd513ef830d8e00d0d2d6a64917fec533315db (diff)
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.
Diffstat (limited to 'src/login/loginctl.c')
-rw-r--r--src/login/loginctl.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/src/login/loginctl.c b/src/login/loginctl.c
index ebe9c1f16c..1773276b95 100644
--- a/src/login/loginctl.c
+++ b/src/login/loginctl.c
@@ -1047,8 +1047,7 @@ static int terminate_seat(sd_bus *bus, char **args, unsigned n) {
return 0;
}
-static int help(void) {
-
+static void help(void) {
printf("%s [OPTIONS...] {COMMAND} ...\n\n"
"Send control commands to or query the login manager.\n\n"
" -h --help Show this help\n"
@@ -1086,10 +1085,8 @@ static int help(void) {
" show-seat NAME... Show properties of one or more seats\n"
" attach NAME DEVICE... Attach one or more devices to a seat\n"
" flush-devices Flush all device associations\n"
- " terminate-seat NAME... Terminate all sessions on one or more seats\n",
- program_invocation_short_name);
-
- return 0;
+ " terminate-seat NAME... Terminate all sessions on one or more seats\n"
+ , program_invocation_short_name);
}
static int parse_argv(int argc, char *argv[]) {
@@ -1123,12 +1120,13 @@ static int parse_argv(int argc, char *argv[]) {
assert(argc >= 0);
assert(argv);
- while ((c = getopt_long(argc, argv, "hp:als:H:M:", options, NULL)) >= 0) {
+ while ((c = getopt_long(argc, argv, "hp:als:H:M:", options, NULL)) >= 0)
switch (c) {
case 'h':
- return help();
+ help();
+ return 0;
case ARG_VERSION:
puts(PACKAGE_STRING);
@@ -1195,7 +1193,6 @@ static int parse_argv(int argc, char *argv[]) {
default:
assert_not_reached("Unhandled option");
}
- }
return 1;
}