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systemctl: add help for --type/-t

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The list of types and load states if lengthy, so a little reminder
can be sometimes useful.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2012-11-15 11:54:57 +01:00
parent 48c2826b4e
commit 45c0c61df3
4 changed files with 32 additions and 3 deletions
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5
man/systemctl.xml
View File

@ -106,6 +106,11 @@
certain unit types. If not specified
units of in all load states will be
shown.</para>
<para>As a special case, if the argument
is <option>help</option>, a list of
allowed values will be printed and the
program will exit.</para>
</listitem>
</varlistentry>

4
src/shared/unit-name.c
View File

@ -33,7 +33,7 @@
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
":-_.\\"
static const char* const unit_type_table[_UNIT_TYPE_MAX] = {
const char* const unit_type_table[_UNIT_TYPE_MAX] = {
[UNIT_SERVICE] = "service",
[UNIT_SOCKET] = "socket",
[UNIT_TARGET] = "target",
@ -48,7 +48,7 @@ static const char* const unit_type_table[_UNIT_TYPE_MAX] = {
DEFINE_STRING_TABLE_LOOKUP(unit_type, UnitType);
static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = {
const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = {
[UNIT_STUB] = "stub",
[UNIT_LOADED] = "loaded",
[UNIT_ERROR] = "error",

4
src/shared/unit-name.h
View File

@ -44,7 +44,7 @@ enum UnitType {
};
enum UnitLoadState {
UNIT_STUB,
UNIT_STUB = 0,
UNIT_LOADED,
UNIT_ERROR,
UNIT_MERGED,
@ -53,9 +53,11 @@ enum UnitLoadState {
_UNIT_LOAD_STATE_INVALID = -1
};
extern const char* const unit_type_table[];
const char *unit_type_to_string(UnitType i);
UnitType unit_type_from_string(const char *s);
extern const char* const unit_load_state_table[];
const char *unit_load_state_to_string(UnitLoadState i);
UnitLoadState unit_load_state_from_string(const char *s);

22
src/systemctl/systemctl.c
View File

@ -4058,6 +4058,22 @@ static int runlevel_help(void) {
return 0;
}
static int help_types(void) {
int i;
puts("Available unit types:");
for(i = UNIT_SERVICE; i < _UNIT_TYPE_MAX; i++)
if (unit_type_table[i])
puts(unit_type_table[i]);
puts("\nAvailable unit load states: ");
for(i = UNIT_STUB; i < _UNIT_LOAD_STATE_MAX; i++)
if (unit_type_table[i])
puts(unit_load_state_table[i]);
return 0;
}
static int systemctl_parse_argv(int argc, char *argv[]) {
enum {
@ -4137,6 +4153,11 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
return 0;
case 't':
if (streq(optarg, "help")) {
help_types();
return 0;
}
if (unit_type_from_string(optarg) >= 0) {
arg_type = optarg;
break;
@ -4147,6 +4168,7 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
}
log_error("Unkown unit type or load state '%s'.",
optarg);
log_info("Use -t help to see a list of allowed values.");
return -EINVAL;
case 'p': {
char **l;