chiark / gitweb /
localectl: port to libsystemd-bus
[elogind.git] / src / libsystemd-bus / bus-util.c
index 5a70fae77ffc4370d90b5325a2f790ebefd451a9..5a0e0cd5034aede9329443453115fb8dca178609 100644 (file)
@@ -19,6 +19,8 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
+#include <sys/socket.h>
+
 #include "sd-event.h"
 #include "sd-bus.h"
 
@@ -81,7 +83,7 @@ int bus_event_loop_with_idle(sd_event *e, sd_bus *bus, const char *name, usec_t
                 if (r == SD_EVENT_FINISHED)
                         break;
 
-                r = sd_event_run(e, exiting ? (uint64_t) -1 : 5 * USEC_PER_SEC /* DEFAULT_EXIT_USEC */);
+                r = sd_event_run(e, exiting ? (uint64_t) -1 : timeout);
                 if (r < 0)
                         return r;
 
@@ -146,7 +148,7 @@ int bus_verify_polkit(
 #ifdef ENABLE_POLKIT
         else {
                 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
-                bool authorized = false, challenge = false;
+                unsigned authorized = false, challenge = false;
 
                 r = sd_bus_call_method(
                                 bus,
@@ -265,7 +267,7 @@ int bus_verify_polkit_async(
 #ifdef ENABLE_POLKIT
         q = hashmap_remove(*registry, m);
         if (q) {
-                bool authorized, challenge;
+                unsigned authorized, challenge;
 
                 /* This is the second invocation of this function, and
                  * there's already a response from polkit, let's
@@ -376,3 +378,254 @@ void bus_verify_polkit_async_registry_free(sd_bus *bus, Hashmap *registry) {
         hashmap_free(registry);
 #endif
 }
+
+static int bus_check_peercred(sd_bus *c) {
+        struct ucred ucred;
+        socklen_t l;
+        int fd;
+
+        assert(c);
+
+        fd = sd_bus_get_fd(c);
+        if (fd < 0)
+                return fd;
+
+        l = sizeof(struct ucred);
+        if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
+                return -errno;
+
+        if (l != sizeof(struct ucred))
+                return -E2BIG;
+
+        if (ucred.uid != 0 && ucred.uid != geteuid())
+                return -EPERM;
+
+        return 1;
+}
+
+int bus_open_system_systemd(sd_bus **_bus) {
+        _cleanup_bus_unref_ sd_bus *bus = NULL;
+        int r;
+
+        assert(_bus);
+
+        if (geteuid() != 0)
+                return sd_bus_open_system(_bus);
+
+        /* If we are root, then let's talk directly to the system
+         * instance, instead of going via the bus */
+
+        r = sd_bus_new(&bus);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_set_address(bus, "unix:path=/run/systemd/private");
+        if (r < 0)
+                return r;
+
+        r = sd_bus_start(bus);
+        if (r < 0)
+                return r;
+
+        r = bus_check_peercred(bus);
+        if (r < 0)
+                return r;
+
+        *_bus = bus;
+        bus = NULL;
+
+        return 0;
+}
+
+int bus_generic_print_property(const char *name, sd_bus_message *property, bool all) {
+        char type;
+        const char *contents;
+
+        assert(name);
+        assert(property);
+
+        sd_bus_message_peek_type(property, &type, &contents);
+
+        switch (type) {
+
+        case SD_BUS_TYPE_STRING: {
+                const char *s;
+                sd_bus_message_read_basic(property, type, &s);
+
+                if (all || !isempty(s))
+                        printf("%s=%s\n", name, s);
+
+                return 1;
+        }
+
+        case SD_BUS_TYPE_BOOLEAN: {
+                bool b;
+
+                sd_bus_message_read_basic(property, type, &b);
+                printf("%s=%s\n", name, yes_no(b));
+
+                return 1;
+        }
+
+        case SD_BUS_TYPE_UINT64: {
+                uint64_t u;
+
+                sd_bus_message_read_basic(property, type, &u);
+
+                /* Yes, heuristics! But we can change this check
+                 * should it turn out to not be sufficient */
+
+                if (endswith(name, "Timestamp")) {
+                        char timestamp[FORMAT_TIMESTAMP_MAX], *t;
+
+                        t = format_timestamp(timestamp, sizeof(timestamp), u);
+                        if (t || all)
+                                printf("%s=%s\n", name, strempty(t));
+
+                } else if (strstr(name, "USec")) {
+                        char timespan[FORMAT_TIMESPAN_MAX];
+
+                        printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u, 0));
+                } else
+                        printf("%s=%llu\n", name, (unsigned long long) u);
+
+                return 1;
+        }
+
+        case SD_BUS_TYPE_UINT32: {
+                uint32_t u;
+
+                sd_bus_message_read_basic(property, type, &u);
+
+                if (strstr(name, "UMask") || strstr(name, "Mode"))
+                        printf("%s=%04o\n", name, u);
+                else
+                        printf("%s=%u\n", name, (unsigned) u);
+
+                return 1;
+        }
+
+        case SD_BUS_TYPE_INT32: {
+                int32_t i;
+
+                sd_bus_message_read_basic(property, type, &i);
+
+                printf("%s=%i\n", name, (int) i);
+                return 1;
+        }
+
+        case SD_BUS_TYPE_DOUBLE: {
+                double d;
+
+                sd_bus_message_read_basic(property, type, &d);
+
+                printf("%s=%g\n", name, d);
+                return 1;
+        }
+
+        case SD_BUS_TYPE_ARRAY:
+
+                if (streq(contents, "s")) {
+                        bool space = false;
+                        char tp;
+                        const char *cnt;
+
+                        sd_bus_message_enter_container(property, SD_BUS_TYPE_ARRAY, contents);
+
+                        sd_bus_message_peek_type(property, &tp, &cnt);
+                        if (all || cnt) {
+                                const char *str;
+
+                                printf("%s=", name);
+
+
+                                while(sd_bus_message_read_basic(property, SD_BUS_TYPE_STRING, &str)) {
+                                        printf("%s%s", space ? " " : "", str);
+
+                                        space = true;
+                                }
+
+                                puts("");
+                        }
+
+                        sd_bus_message_exit_container(property);
+
+                        return 1;
+
+                } else if (streq(contents, "y")) {
+                        const uint8_t *u;
+                        size_t n;
+
+                        sd_bus_message_read_array(property, SD_BUS_TYPE_BYTE, (const void**) &u, &n);
+                        if (all || n > 0) {
+                                unsigned int i;
+
+                                printf("%s=", name);
+
+                                for (i = 0; i < n; i++)
+                                        printf("%02x", u[i]);
+
+                                puts("");
+                        }
+
+                        return 1;
+
+                } else if (streq(contents, "u")) {
+                        uint32_t *u;
+                        size_t n;
+
+                        sd_bus_message_read_array(property, SD_BUS_TYPE_UINT32, (const void**) &u, &n);
+                        if (all || n > 0) {
+                                unsigned int i;
+
+                                printf("%s=", name);
+
+                                for (i = 0; i < n; i++)
+                                        printf("%08x", u[i]);
+
+                                puts("");
+                        }
+
+                        return 1;
+                }
+
+                break;
+        }
+
+        return 0;
+}
+
+int bus_open_transport(BusTransport transport, const char *host, bool user, sd_bus **bus) {
+        int r;
+
+        assert(transport >= 0);
+        assert(transport < _BUS_TRANSPORT_MAX);
+        assert(bus);
+
+        assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
+        assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -ENOTSUP);
+
+        switch (transport) {
+
+        case BUS_TRANSPORT_LOCAL:
+                if (user)
+                        r = sd_bus_open_user(bus);
+                else
+                        r = sd_bus_open_system(bus);
+
+                break;
+
+        case BUS_TRANSPORT_REMOTE:
+                r = sd_bus_open_system_remote(host, bus);
+                break;
+
+        case BUS_TRANSPORT_CONTAINER:
+                r = sd_bus_open_system_container(host, bus);
+                break;
+
+        default:
+                assert_not_reached("Hmm, unknown transport type.");
+        }
+
+        return r;
+}