systemctl: allow multiple arguments to --type

This mirrors --property, and is generally useful.

New functionality is used in bash completion.

In case of zsh completion, new functionality is less useful
because of caching. Nevertheless, zsh completion for restart
is made to behave more-or-less the same as bash completion.
At least sockets can be restarted.

man/systemctl.xml

@@ -92,21 +92,22 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>.
         <term><option>--type=</option></term>
 
         <listitem>
-          <para>The argument should be a unit type name such as
-          <option>service</option> and <option>socket</option>, or a
-          unit load state such as <option>loaded</option> and
-          <option>masked</option>.
-          </para>
-
-          <para>If the argument is a unit type, when listing units,
-          limit display to certain unit types. If not specified units
+          <para>The argument should be a comma separated list of unit
+          types such as <option>service</option> and
+          <option>socket</option>, or unit load states such as
+          <option>loaded</option> and <option>masked</option>
+          (types and states can be mixed).</para>
+
+          <para>If one of the arguments is a unit type, when listing
+          units, limit display to certain unit types. Otherwise units
           of all types will be shown.</para>
 
-          <para>If the argument is a unit load state, when listing
-          units, limit display to certain unit types. If not specified
-          units of in all load states will be shown.</para>
+          <para>If one of the arguments is a unit load state, when
+          listing units, limit display to certain unit
+          types. Otherwise units of in all load states will be
+          shown.</para>
 
-          <para>As a special case, if the argument is
+          <para>As a special case, if one of the arguments is
           <option>help</option>, a list of allowed values will be
           printed and the program will exit.</para>
         </listitem>

shell-completion/bash/systemctl

@@ -45,7 +45,7 @@ __get_all_units      () { __systemctl $1 list-units --all \
         | { while read -r a b; do echo " $a"; done; }; }
 __get_active_units   () { __systemctl $1 list-units       \
         | { while read -r a b; do echo " $a"; done; }; }
-__get_inactive_units () { __systemctl $1 list-units --all \
+__get_startable_units () { __systemctl $1 list-units --all -t service,timer,socket,mount,automount,path,snapshot,swap \
         | { while read -r a b c d; do [[ $c == "inactive" || $c == "failed " ]] && echo " $a"; done; }; }
 __get_failed_units   () { __systemctl $1 list-units       \
         | { while read -r a b c d; do [[ $c == "failed"   ]] && echo " $a"; done; }; }
@@ -156,10 +156,7 @@ _systemctl () {
 
         elif __contains_word "$verb" ${VERBS[STARTABLE_UNITS]}; then
                 comps=$( __filter_units_by_property $mode CanStart yes \
-                      $( __get_inactive_units $mode \
-                        | while read -r line; do \
-                                [[ "$line" =~ \.(device|snapshot)$ ]] || echo " $line"; \
-                        done ))
+                      $( __get_startable_units $mode))
 
         elif __contains_word "$verb" ${VERBS[RESTARTABLE_UNITS]}; then
                 comps=$( __filter_units_by_property $mode CanStart yes \

shell-completion/systemd-zsh-completion.zsh

@@ -536,7 +536,7 @@ for fun in restart reload-or-restart ; do
     _systemctl_all_units
     compadd "$@" - $( _filter_units_by_property CanStart yes \
       ${_sys_all_units[*]} | while read line; do \
-      [[ "$line" =~ \.(device|snapshot|socket|timer)$ ]] || echo " $line"; \
+      [[ "$line" =~ \.device$ ]] || echo " $line"; \
       done )
   }
 done

src/systemctl/systemctl.c

@@ -68,9 +68,9 @@
 #include "socket-util.h"
 #include "fileio.h"
 
-static const char *arg_type = NULL;
-static const char *arg_load_state = NULL;
-static char **arg_property = NULL;
+static char **arg_types = NULL;
+static char **arg_load_states = NULL;
+static char **arg_properties = NULL;
 static bool arg_all = false;
 static const char *arg_job_mode = "replace";
 static UnitFileScope arg_scope = UNIT_FILE_SYSTEM;
@@ -295,9 +295,9 @@ static bool output_show_unit(const struct unit_info *u) {
         if (arg_failed)
                 return streq(u->active_state, "failed");
 
-        return (!arg_type || ((dot = strrchr(u->id, '.')) &&
-                              streq(dot+1, arg_type))) &&
-                (!arg_load_state || streq(u->load_state, arg_load_state)) &&
+        return (!arg_types || ((dot = strrchr(u->id, '.')) &&
+                               strv_find(arg_types, dot+1))) &&
+                (!arg_load_states || strv_find(arg_load_states, u->load_state)) &&
                 (arg_all || !(streq(u->active_state, "inactive")
                               || u->following[0]) || u->job_id > 0);
 }
@@ -524,7 +524,7 @@ static int compare_unit_file_list(const void *a, const void *b) {
 static bool output_show_unit_file(const UnitFileList *u) {
         const char *dot;
 
-        return !arg_type || ((dot = strrchr(u->path, '.')) && streq(dot+1, arg_type));
+        return !arg_types || ((dot = strrchr(u->path, '.')) && strv_find(arg_types, dot+1));
 }
 
 static void output_unit_file_list(const UnitFileList *units, unsigned c) {
@@ -2946,7 +2946,7 @@ static int print_property(const char *name, DBusMessageIter *iter) {
         /* This is a low-level property printer, see
          * print_status_info() for the nicer output */
 
-        if (arg_property && !strv_find(arg_property, name))
+        if (arg_properties && !strv_find(arg_properties, name))
                 return 0;
 
         switch (dbus_message_iter_get_arg_type(iter)) {
@@ -4504,45 +4504,67 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
                         puts(SYSTEMD_FEATURES);
                         return 0;
 
-                case 't':
-                        if (streq(optarg, "help")) {
-                                help_types();
-                                return 0;
-                        }
+                case 't': {
+                        char *word, *state;
+                        size_t size;
 
-                        if (unit_type_from_string(optarg) >= 0) {
-                                arg_type = optarg;
-                                break;
-                        }
-                        if (unit_load_state_from_string(optarg) >= 0) {
-                                arg_load_state = optarg;
-                                break;
+                        FOREACH_WORD_SEPARATOR(word, size, optarg, ",", state) {
+                                char _cleanup_free_ *type;
+
+                                type = strndup(word, size);
+                                if (!type)
+                                        return -ENOMEM;
+
+                                if (streq(type, "help")) {
+                                        help_types();
+                                        return 0;
+                                }
+
+                                if (unit_type_from_string(type) >= 0) {
+                                        if (strv_push(&arg_types, type))
+                                                return log_oom();
+                                        type = NULL;
+                                        continue;
+                                }
+
+                                if (unit_load_state_from_string(optarg) >= 0) {
+                                        if (strv_push(&arg_load_states, type))
+                                                return log_oom();
+                                        type = NULL;
+                                        continue;
+                                }
+
+                                log_error("Unkown unit type or load state '%s'.", type);
+                                log_info("Use -t help to see a list of allowed values.");
+                                return -EINVAL;
                         }
-                        log_error("Unkown unit type or load state '%s'.",
-                                  optarg);
-                        log_info("Use -t help to see a list of allowed values.");
-                        return -EINVAL;
+
+                        break;
+                }
+
                 case 'p': {
-                        char *word, *state;
-                        size_t size;
                         /* Make sure that if the empty property list
                            was specified, we won't show any properties. */
-                        const char *source = isempty(optarg) ? " " : optarg;
+                        if (isempty(optarg) && !arg_properties) {
+                                arg_properties = strv_new(NULL, NULL);
+                                if (!arg_properties)
+                                        return log_oom();
+                        } else {
+                                char *word, *state;
+                                size_t size;
 
-                        FOREACH_WORD_SEPARATOR(word, size, source, ",", state) {
-                                char _cleanup_free_ *prop;
-                                char **tmp;
+                                FOREACH_WORD_SEPARATOR(word, size, optarg, ",", state) {
+                                        char *prop;
 
-                                prop = strndup(word, size);
-                                if (!prop)
-                                        return -ENOMEM;
+                                        prop = strndup(word, size);
+                                        if (!prop)
+                                                return log_oom();
 
-                                tmp = strv_append(arg_property, prop);
-                                if (!tmp)
-                                        return -ENOMEM;
-
-                                strv_free(arg_property);
-                                arg_property = tmp;
+                                        if (strv_push(&arg_properties, prop)) {
+                                                free(prop);
+                                                return log_oom();
+                                        }
+                                }
                         }
 
                         /* If the user asked for a particular
@@ -5725,7 +5747,9 @@ finish:
 
         dbus_shutdown();
 
-        strv_free(arg_property);
+        strv_free(arg_types);
+        strv_free(arg_load_states);
+        strv_free(arg_properties);
 
         pager_close();
         ask_password_agent_close();