chiark / gitweb /
busctl: split out introspection parser from tree logic so that we can reuse it for...
[elogind.git] / src / libsystemd / sd-bus / busctl.c
index 2bf890e88faac829779ee106a39b196771ec7368..c58a97bc145fe73f08c35c6358debca5b557344b 100644 (file)
@@ -35,6 +35,7 @@
 #include "bus-util.h"
 #include "bus-dump.h"
 #include "bus-signature.h"
+#include "busctl-introspect.h"
 
 static bool arg_no_pager = false;
 static bool arg_legend = true;
@@ -304,550 +305,27 @@ static void print_tree(const char *prefix, char **l) {
         print_subtree(prefix, "/", l);
 }
 
-static int parse_xml_annotation(
-                const char **p,
-                void **xml_state) {
-
-
-        enum {
-                STATE_ANNOTATION,
-                STATE_NAME,
-                STATE_VALUE
-        } state = STATE_ANNOTATION;
-
-        for (;;) {
-                _cleanup_free_ char *name = NULL;
-
-                int t;
-
-                t = xml_tokenize(p, &name, xml_state, NULL);
-                if (t < 0) {
-                        log_error("XML parse error.");
-                        return t;
-                }
-
-                if (t == XML_END) {
-                        log_error("Premature end of XML data.");
-                        return -EBADMSG;
-                }
-
-                switch (state) {
-
-                case STATE_ANNOTATION:
-
-                        if (t == XML_ATTRIBUTE_NAME) {
-
-                                if (streq_ptr(name, "name"))
-                                        state = STATE_NAME;
-
-                                else if (streq_ptr(name, "value"))
-                                        state = STATE_VALUE;
-
-                                else {
-                                        log_error("Unexpected <annotation> attribute %s.", name);
-                                        return -EBADMSG;
-                                }
-
-                        } else if (t == XML_TAG_CLOSE_EMPTY ||
-                                   (t == XML_TAG_CLOSE && streq_ptr(name, "annotation")))
-
-                                return 0;
-
-                        else if (t != XML_TEXT || !in_charset(name, WHITESPACE)) {
-                                log_error("Unexpected token in <annotation>. (1)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_NAME:
-
-                        if (t == XML_ATTRIBUTE_VALUE)
-                                state = STATE_ANNOTATION;
-                        else {
-                                log_error("Unexpected token in <annotation>. (2)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_VALUE:
-
-                        if (t == XML_ATTRIBUTE_VALUE)
-                                state = STATE_ANNOTATION;
-                        else {
-                                log_error("Unexpected token in <annotation>. (3)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                default:
-                        assert_not_reached("Bad state");
-                }
-        }
-}
-
-static int parse_xml_node(
-                const char *prefix,
-                Set *paths,
-                const char **p,
-                void **xml_state) {
-
-        enum {
-                STATE_NODE,
-                STATE_NODE_NAME,
-                STATE_INTERFACE,
-                STATE_INTERFACE_NAME,
-                STATE_METHOD,
-                STATE_METHOD_NAME,
-                STATE_METHOD_ARG,
-                STATE_METHOD_ARG_NAME,
-                STATE_METHOD_ARG_TYPE,
-                STATE_METHOD_ARG_DIRECTION,
-                STATE_SIGNAL,
-                STATE_SIGNAL_NAME,
-                STATE_SIGNAL_ARG,
-                STATE_SIGNAL_ARG_NAME,
-                STATE_SIGNAL_ARG_TYPE,
-                STATE_PROPERTY,
-                STATE_PROPERTY_NAME,
-                STATE_PROPERTY_TYPE,
-                STATE_PROPERTY_ACCESS,
-        } state = STATE_NODE;
-
-        _cleanup_free_ char *node_path = NULL;
-        const char *np = prefix;
+static int on_path(const char *path, void *userdata) {
+        Set *paths = userdata;
         int r;
 
-        for (;;) {
-                _cleanup_free_ char *name = NULL;
-                int t;
-
-                t = xml_tokenize(p, &name, xml_state, NULL);
-                if (t < 0) {
-                        log_error("XML parse error.");
-                        return t;
-                }
-
-                if (t == XML_END) {
-                        log_error("Premature end of XML data.");
-                        return -EBADMSG;
-                }
-
-                switch (state) {
-
-                case STATE_NODE:
-                        if (t == XML_ATTRIBUTE_NAME) {
-
-                                if (streq_ptr(name, "name"))
-                                        state = STATE_NODE_NAME;
-                                else {
-                                        log_error("Unexpected <node> attribute %s.", name);
-                                        return -EBADMSG;
-                                }
-
-                        } else if (t == XML_TAG_OPEN) {
-
-                                if (streq_ptr(name, "interface"))
-                                        state = STATE_INTERFACE;
-
-                                else if (streq_ptr(name, "node")) {
-
-                                        r = parse_xml_node(np, paths, p, xml_state);
-                                        if (r < 0)
-                                                return r;
-                                } else {
-                                        log_error("Unexpected <node> tag %s.", name);
-                                        return -EBADMSG;
-                                }
-                        } else if (t == XML_TAG_CLOSE_EMPTY ||
-                                   (t == XML_TAG_CLOSE && streq_ptr(name, "node"))) {
-
-                                if (paths) {
-                                        if (!node_path) {
-                                                node_path = strdup(np);
-                                                if (!node_path)
-                                                        return log_oom();
-                                        }
-
-                                        r = set_put(paths, node_path);
-                                        if (r < 0)
-                                                return log_oom();
-                                        else if (r > 0)
-                                                node_path = NULL;
-                                }
-
-                                return 0;
-
-                        } else if (t != XML_TEXT || !in_charset(name, WHITESPACE)) {
-                                log_error("Unexpected token in <node>. (1)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_NODE_NAME:
-
-                        if (t == XML_ATTRIBUTE_VALUE) {
-
-                                free(node_path);
-
-                                if (name[0] == '/') {
-                                        node_path = name;
-                                        name = NULL;
-                                } else {
-
-                                        if (endswith(prefix, "/"))
-                                                node_path = strappend(prefix, name);
-                                        else
-                                                node_path = strjoin(prefix, "/", name, NULL);
-                                        if (!node_path)
-                                                return log_oom();
-                                }
-
-                                np = node_path;
-                                state = STATE_NODE;
-                        } else {
-                                log_error("Unexpected token in <node>. (2)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_INTERFACE:
-
-                        if (t == XML_ATTRIBUTE_NAME) {
-                                if (streq_ptr(name, "name"))
-                                        state = STATE_INTERFACE_NAME;
-                                else {
-                                        log_error("Unexpected <interface> attribute %s.", name);
-                                        return -EBADMSG;
-                                }
-
-                        } else if (t == XML_TAG_OPEN) {
-                                if (streq_ptr(name, "method"))
-                                        state = STATE_METHOD;
-                                else if (streq_ptr(name, "signal"))
-                                        state = STATE_SIGNAL;
-                                else if (streq_ptr(name, "property"))
-                                        state = STATE_PROPERTY;
-                                else if (streq_ptr(name, "annotation")) {
-                                        r = parse_xml_annotation(p, xml_state);
-                                        if (r < 0)
-                                                return r;
-                                } else {
-                                        log_error("Unexpected <interface> tag %s.", name);
-                                        return -EINVAL;
-                                }
-                        } else if (t == XML_TAG_CLOSE_EMPTY ||
-                                   (t == XML_TAG_CLOSE && streq_ptr(name, "interface")))
-
-                                state = STATE_NODE;
-
-                        else if (t != XML_TEXT || !in_charset(name, WHITESPACE)) {
-                                log_error("Unexpected token in <interface>. (1)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_INTERFACE_NAME:
-
-                        if (t == XML_ATTRIBUTE_VALUE)
-                                state = STATE_INTERFACE;
-                        else {
-                                log_error("Unexpected token in <interface>. (2)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_METHOD:
-
-                        if (t == XML_ATTRIBUTE_NAME) {
-                                if (streq_ptr(name, "name"))
-                                        state = STATE_METHOD_NAME;
-                                else {
-                                        log_error("Unexpected <method> attribute %s", name);
-                                        return -EBADMSG;
-                                }
-                        } else if (t == XML_TAG_OPEN) {
-                                if (streq_ptr(name, "arg"))
-                                        state = STATE_METHOD_ARG;
-                                else if (streq_ptr(name, "annotation")) {
-                                        r = parse_xml_annotation(p, xml_state);
-                                        if (r < 0)
-                                                return r;
-                                } else {
-                                        log_error("Unexpected <method> tag %s.", name);
-                                        return -EINVAL;
-                                }
-                        } else if (t == XML_TAG_CLOSE_EMPTY ||
-                                   (t == XML_TAG_CLOSE && streq_ptr(name, "method")))
-
-                                state = STATE_INTERFACE;
-
-                        else if (t != XML_TEXT || !in_charset(name, WHITESPACE)) {
-                                log_error("Unexpected token in <method> (1).");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_METHOD_NAME:
-
-                        if (t == XML_ATTRIBUTE_VALUE)
-                                state = STATE_METHOD;
-                        else {
-                                log_error("Unexpected token in <method> (2).");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_METHOD_ARG:
-
-                        if (t == XML_ATTRIBUTE_NAME) {
-                                if (streq_ptr(name, "name"))
-                                        state = STATE_METHOD_ARG_NAME;
-                                else if (streq_ptr(name, "type"))
-                                        state = STATE_METHOD_ARG_TYPE;
-                                else if (streq_ptr(name, "direction"))
-                                         state = STATE_METHOD_ARG_DIRECTION;
-                                else {
-                                        log_error("Unexpected method <arg> attribute %s.", name);
-                                        return -EBADMSG;
-                                }
-                        } else if (t == XML_TAG_OPEN) {
-                                if (streq_ptr(name, "annotation")) {
-                                        r = parse_xml_annotation(p, xml_state);
-                                        if (r < 0)
-                                                return r;
-                                } else {
-                                        log_error("Unexpected method <arg> tag %s.", name);
-                                        return -EINVAL;
-                                }
-                        } else if (t == XML_TAG_CLOSE_EMPTY ||
-                                   (t == XML_TAG_CLOSE && streq_ptr(name, "arg")))
-
-                                state = STATE_METHOD;
-
-                        else if (t != XML_TEXT || !in_charset(name, WHITESPACE)) {
-                                log_error("Unexpected token in method <arg>. (1)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_METHOD_ARG_NAME:
-
-                        if (t == XML_ATTRIBUTE_VALUE)
-                                state = STATE_METHOD_ARG;
-                        else {
-                                log_error("Unexpected token in method <arg>. (2)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_METHOD_ARG_TYPE:
-
-                        if (t == XML_ATTRIBUTE_VALUE)
-                                state = STATE_METHOD_ARG;
-                        else {
-                                log_error("Unexpected token in method <arg>. (3)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_METHOD_ARG_DIRECTION:
-
-                        if (t == XML_ATTRIBUTE_VALUE)
-                                state = STATE_METHOD_ARG;
-                        else {
-                                log_error("Unexpected token in method <arg>. (4)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_SIGNAL:
-
-                        if (t == XML_ATTRIBUTE_NAME) {
-                                if (streq_ptr(name, "name"))
-                                        state = STATE_SIGNAL_NAME;
-                                else {
-                                        log_error("Unexpected <signal> attribute %s.", name);
-                                        return -EBADMSG;
-                                }
-                        } else if (t == XML_TAG_OPEN) {
-                                if (streq_ptr(name, "arg"))
-                                        state = STATE_SIGNAL_ARG;
-                                else if (streq_ptr(name, "annotation")) {
-                                        r = parse_xml_annotation(p, xml_state);
-                                        if (r < 0)
-                                                return r;
-                                } else {
-                                        log_error("Unexpected <signal> tag %s.", name);
-                                        return -EINVAL;
-                                }
-                        } else if (t == XML_TAG_CLOSE_EMPTY ||
-                                   (t == XML_TAG_CLOSE && streq_ptr(name, "signal")))
-
-                                state = STATE_INTERFACE;
-
-                        else if (t != XML_TEXT || !in_charset(name, WHITESPACE)) {
-                                log_error("Unexpected token in <signal>. (1)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_SIGNAL_NAME:
-
-                        if (t == XML_ATTRIBUTE_VALUE)
-                                state = STATE_SIGNAL;
-                        else {
-                                log_error("Unexpected token in <signal>. (2)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-
-                case STATE_SIGNAL_ARG:
-
-                        if (t == XML_ATTRIBUTE_NAME) {
-                                if (streq_ptr(name, "name"))
-                                        state = STATE_SIGNAL_ARG_NAME;
-                                else if (streq_ptr(name, "type"))
-                                        state = STATE_SIGNAL_ARG_TYPE;
-                                else {
-                                        log_error("Unexpected signal <arg> attribute %s.", name);
-                                        return -EBADMSG;
-                                }
-                        } else if (t == XML_TAG_OPEN) {
-                                if (streq_ptr(name, "annotation")) {
-                                        r = parse_xml_annotation(p, xml_state);
-                                        if (r < 0)
-                                                return r;
-                                } else {
-                                        log_error("Unexpected signal <arg> tag %s.", name);
-                                        return -EINVAL;
-                                }
-                        } else if (t == XML_TAG_CLOSE_EMPTY ||
-                                   (t == XML_TAG_CLOSE && streq_ptr(name, "arg")))
-
-                                state = STATE_SIGNAL;
-
-                        else if (t != XML_TEXT || !in_charset(name, WHITESPACE)) {
-                                log_error("Unexpected token in signal <arg> (1).");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_SIGNAL_ARG_NAME:
-
-                        if (t == XML_ATTRIBUTE_VALUE)
-                                state = STATE_SIGNAL_ARG;
-                        else {
-                                log_error("Unexpected token in signal <arg> (2).");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_SIGNAL_ARG_TYPE:
-
-                        if (t == XML_ATTRIBUTE_VALUE)
-                                state = STATE_SIGNAL_ARG;
-                        else {
-                                log_error("Unexpected token in signal <arg> (3).");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_PROPERTY:
-
-                        if (t == XML_ATTRIBUTE_NAME) {
-                                if (streq_ptr(name, "name"))
-                                        state = STATE_PROPERTY_NAME;
-                                else if (streq_ptr(name, "type"))
-                                        state  = STATE_PROPERTY_TYPE;
-                                else if (streq_ptr(name, "access"))
-                                        state  = STATE_PROPERTY_ACCESS;
-                                else {
-                                        log_error("Unexpected <property> attribute %s.", name);
-                                        return -EBADMSG;
-                                }
-                        } else if (t == XML_TAG_OPEN) {
-
-                                if (streq_ptr(name, "annotation")) {
-                                        r = parse_xml_annotation(p, xml_state);
-                                        if (r < 0)
-                                                return r;
-                                } else {
-                                        log_error("Unexpected <property> tag %s.", name);
-                                        return -EINVAL;
-                                }
+        assert(paths);
 
-                        } else if (t == XML_TAG_CLOSE_EMPTY ||
-                                   (t == XML_TAG_CLOSE && streq_ptr(name, "property")))
-
-                                state = STATE_INTERFACE;
-
-                        else if (t != XML_TEXT || !in_charset(name, WHITESPACE)) {
-                                log_error("Unexpected token in <property>. (1)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_PROPERTY_NAME:
-
-                        if (t == XML_ATTRIBUTE_VALUE)
-                                state = STATE_PROPERTY;
-                        else {
-                                log_error("Unexpected token in <property>. (2)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_PROPERTY_TYPE:
-
-                        if (t == XML_ATTRIBUTE_VALUE)
-                                state = STATE_PROPERTY;
-                        else {
-                                log_error("Unexpected token in <property>. (3)");
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case STATE_PROPERTY_ACCESS:
-
-                        if (t == XML_ATTRIBUTE_VALUE)
-                                state = STATE_PROPERTY;
-                        else {
-                                log_error("Unexpected token in <property>. (4)");
-                                return -EINVAL;
-                        }
+        r = set_put_strdup(paths, path);
+        if (r < 0)
+                return log_oom();
 
-                        break;
-                }
-        }
+        return 0;
 }
 
 static int find_nodes(sd_bus *bus, const char *service, const char *path, Set *paths) {
+        const XMLIntrospectOps ops = {
+                .on_path = on_path,
+        };
+
         _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
-        _cleanup_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-        const char *xml, *p;
-        void *xml_state = NULL;
+        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+        const char *xml;
         int r;
 
         r = sd_bus_call_method(bus, service, path, "org.freedesktop.DBus.Introspectable", "Introspect", &error, &reply, "");
@@ -861,37 +339,7 @@ static int find_nodes(sd_bus *bus, const char *service, const char *path, Set *p
                 return bus_log_parse_error(r);
 
         /* fputs(xml, stdout); */
-
-        p = xml;
-        for (;;) {
-                _cleanup_free_ char *name = NULL;
-
-                r = xml_tokenize(&p, &name, &xml_state, NULL);
-                if (r < 0) {
-                        log_error("XML parse error");
-                        return r;
-                }
-
-                if (r == XML_END)
-                        break;
-
-                if (r == XML_TAG_OPEN) {
-
-                        if (streq(name, "node")) {
-                                r = parse_xml_node(path, paths, &p, &xml_state);
-                                if (r < 0)
-                                        return r;
-                        } else {
-                                log_error("Unexpected tag '%s' in introspection data.", name);
-                                return -EBADMSG;
-                        }
-                } else if (r != XML_TEXT || !in_charset(name, WHITESPACE)) {
-                        log_error("Unexpected token.");
-                        return -EINVAL;
-                }
-        }
-
-        return 0;
+        return parse_xml_introspect(path, xml, &ops, paths);
 }
 
 static int tree_one(sd_bus *bus, const char *service, const char *prefix) {
@@ -1023,7 +471,7 @@ static int tree(sd_bus *bus, char **argv) {
 }
 
 static int message_dump(sd_bus_message *m, FILE *f) {
-        return bus_message_dump(m, f, true);
+        return bus_message_dump(m, f, BUS_MESSAGE_DUMP_WITH_HEADER);
 }
 
 static int message_pcap(sd_bus_message *m, FILE *f) {
@@ -1445,7 +893,108 @@ static int call(sd_bus *bus, char *argv[]) {
                 return bus_log_parse_error(r);
         if (r == 0 && !arg_quiet) {
                 pager_open_if_enabled();
-                bus_message_dump(reply, stdout, false);
+                bus_message_dump(reply, stdout, 0);
+        }
+
+        return 0;
+}
+
+static int get_property(sd_bus *bus, char *argv[]) {
+        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+        unsigned n;
+        int r;
+
+        assert(bus);
+
+        n = strv_length(argv);
+        if (n < 3) {
+                log_error("Expects at least three arguments.");
+                return -EINVAL;
+        }
+
+        if (n < 5) {
+                _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+                bool not_first = false;
+
+                r = sd_bus_call_method(bus, argv[1], argv[2], "org.freedesktop.DBus.Properties", "GetAll", &error, &reply, "s", strempty(argv[3]));
+                if (r < 0) {
+                        log_error("%s", bus_error_message(&error, r));
+                        return r;
+                }
+
+                r = sd_bus_message_enter_container(reply, 'a', "{sv}");
+                if (r < 0)
+                        return bus_log_parse_error(r);
+
+                for (;;) {
+                        const char *name;
+
+                        r = sd_bus_message_enter_container(reply, 'e', "sv");
+                        if (r < 0)
+                                return bus_log_parse_error(r);
+
+                        if (r == 0)
+                                break;
+
+                        r = sd_bus_message_read(reply, "s", &name);
+                        if (r < 0)
+                                return bus_log_parse_error(r);
+
+                        if (not_first)
+                                printf("\n");
+
+                        printf("Property %s:\n", name);
+
+                        r = sd_bus_message_enter_container(reply, 'v', NULL);
+                        if (r < 0)
+                                return bus_log_parse_error(r);
+
+                        pager_open_if_enabled();
+                        bus_message_dump(reply, stdout, BUS_MESSAGE_DUMP_SUBTREE_ONLY);
+
+                        r = sd_bus_message_exit_container(reply);
+                        if (r < 0)
+                                return bus_log_parse_error(r);
+
+                        r = sd_bus_message_exit_container(reply);
+                        if (r < 0)
+                                return bus_log_parse_error(r);
+
+                        not_first = true;
+                }
+
+                r = sd_bus_message_exit_container(reply);
+                if (r < 0)
+                        return bus_log_parse_error(r);
+        } else {
+                char **i;
+
+                STRV_FOREACH(i, argv + 4) {
+                        _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+
+                        r = sd_bus_call_method(bus, argv[1], argv[2], "org.freedesktop.DBus.Properties", "Get", &error, &reply, "ss", argv[3], *i);
+                        if (r < 0) {
+                                log_error("%s", bus_error_message(&error, r));
+                                return r;
+                        }
+
+                        r = sd_bus_message_enter_container(reply, 'v', NULL);
+                        if (r < 0)
+                                return bus_log_parse_error(r);
+
+                        if (i > argv + 4)
+                                printf("\n");
+
+                        if (argv[5])
+                                printf("Property %s:\n", *i);
+
+                        pager_open_if_enabled();
+                        bus_message_dump(reply, stdout, BUS_MESSAGE_DUMP_SUBTREE_ONLY);
+
+                        r = sd_bus_message_exit_container(reply);
+                        if (r < 0)
+                                return bus_log_parse_error(r);
+                }
         }
 
         return 0;
@@ -1476,8 +1025,10 @@ static int help(void) {
                "  monitor [SERVICE...]    Show bus traffic\n"
                "  capture [SERVICE...]    Capture bus traffic as pcap\n"
                "  status SERVICE          Show service name status\n"
-               "  call SERVICE PATH INTERFACE METHOD [SIGNATURE] [ARGUMENTS...]\n"
+               "  call SERVICE PATH INTERFACE METHOD [SIGNATURE [ARGUMENTS...]]\n"
                "                          Call a method\n"
+               "  get-property SERVICE PATH [INTERFACE [PROPERTY...]]\n"
+               "                          Get property value\n"
                "  help                    Show this help\n"
                , program_invocation_short_name);
 
@@ -1649,6 +1200,9 @@ static int busctl_main(sd_bus *bus, int argc, char *argv[]) {
         if (streq(argv[optind], "call"))
                 return call(bus, argv + optind);
 
+        if (streq(argv[optind], "get-property"))
+                return get_property(bus, argv + optind);
+
         if (streq(argv[optind], "help"))
                 return help();