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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/sysctl
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/sysctl')
-rw-r--r--src/sysctl/sysctl.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/src/sysctl/sysctl.c b/src/sysctl/sysctl.c
index 06defa5b7c..8ce9870432 100644
--- a/src/sysctl/sysctl.c
+++ b/src/sysctl/sysctl.c
@@ -214,16 +214,13 @@ static int parse_file(Hashmap *sysctl_options, const char *path, bool ignore_eno
return r;
}
-static int help(void) {
-
+static void help(void) {
printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
"Applies kernel sysctl settings.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
- " --prefix=PATH Only apply rules that apply to paths with the specified prefix\n",
- program_invocation_short_name);
-
- return 0;
+ " --prefix=PATH Only apply rules that apply to paths with the specified prefix\n"
+ , program_invocation_short_name);
}
static int parse_argv(int argc, char *argv[]) {
@@ -245,12 +242,13 @@ 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);
@@ -276,7 +274,6 @@ static int parse_argv(int argc, char *argv[]) {
default:
assert_not_reached("Unhandled option");
}
- }
return 1;
}