chiark / gitweb /
Prep v228: Apply more cosmetic changes found in upstream.
[elogind.git] / src / shared / bus-util.c
index 017b60decf723588b3bee6c43e002dd21a4fe5ca..c7e51a11b2ae5b3ddea0f71fb8ff337f4b687916 100644 (file)
 
 #include <sys/socket.h>
 
+#include "sd-bus.h"
 #include "sd-daemon.h"
 #include "sd-event.h"
-#include "util.h"
-#include "strv.h"
-#include "macro.h"
-#include "def.h"
-#include "path-util.h"
-#include "missing.h"
-#include "set.h"
-#include "signal-util.h"
-#include "unit-name.h"
 
-#include "sd-bus.h"
+#include "alloc-util.h"
 #include "bus-error.h"
+#include "bus-internal.h"
 #include "bus-label.h"
 #include "bus-message.h"
 #include "bus-util.h"
-#include "bus-internal.h"
+#include "cgroup-util.h"
+#include "def.h"
+//#include "env-util.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "macro.h"
+#include "missing.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "proc-cmdline.h"
+#include "process-util.h"
+//#include "rlimit-util.h"
+#include "set.h"
+#include "signal-util.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "syslog-util.h"
+#include "unit-name.h"
+#include "user-util.h"
+#include "utf8.h"
+#include "util.h"
 
+/// UNNEEDED by elogind
+#if 0
 static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
         sd_event *e = userdata;
 
@@ -93,8 +109,6 @@ int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) {
         return 0;
 }
 
-/// UNNEEDED by elogind
-#if 0
 int bus_event_loop_with_idle(
                 sd_event *e,
                 sd_bus *bus,
@@ -223,6 +237,7 @@ int bus_test_polkit(
                 sd_bus_message *call,
                 int capability,
                 const char *action,
+                const char **details,
                 uid_t good_user,
                 bool *_challenge,
                 sd_bus_error *e) {
@@ -245,29 +260,52 @@ int bus_test_polkit(
                 return 1;
 #ifdef ENABLE_POLKIT
         else {
+                _cleanup_bus_message_unref_ sd_bus_message *request = NULL;
                 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
                 int authorized = false, challenge = false;
-                const char *sender;
+                const char *sender, **k, **v;
 
                 sender = sd_bus_message_get_sender(call);
                 if (!sender)
                         return -EBADMSG;
 
-                r = sd_bus_call_method(
+                r = sd_bus_message_new_method_call(
                                 call->bus,
+                                &request,
                                 "org.freedesktop.PolicyKit1",
                                 "/org/freedesktop/PolicyKit1/Authority",
                                 "org.freedesktop.PolicyKit1.Authority",
-                                "CheckAuthorization",
-                                e,
-                                &reply,
-                                "(sa{sv})sa{ss}us",
+                                "CheckAuthorization");
+                if (r < 0)
+                        return r;
+
+                r = sd_bus_message_append(
+                                request,
+                                "(sa{sv})s",
                                 "system-bus-name", 1, "name", "s", sender,
-                                action,
-                                0,
-                                0,
-                                "");
+                                action);
+                if (r < 0)
+                        return r;
+
+                r = sd_bus_message_open_container(request, 'a', "{ss}");
+                if (r < 0)
+                        return r;
+
+                STRV_FOREACH_PAIR(k, v, details) {
+                        r = sd_bus_message_append(request, "{ss}", *k, *v);
+                        if (r < 0)
+                                return r;
+                }
+
+                r = sd_bus_message_close_container(request);
+                if (r < 0)
+                        return r;
+
+                r = sd_bus_message_append(request, "us", 0, NULL);
+                if (r < 0)
+                        return r;
 
+                r = sd_bus_call(call->bus, request, 0, e, &reply);
                 if (r < 0) {
                         /* Treat no PK available as access denied */
                         if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN)) {
@@ -357,6 +395,7 @@ int bus_verify_polkit_async(
                 sd_bus_message *call,
                 int capability,
                 const char *action,
+                const char **details,
                 bool interactive,
                 uid_t good_user,
                 Hashmap **registry,
@@ -365,7 +404,7 @@ int bus_verify_polkit_async(
 #ifdef ENABLE_POLKIT
         _cleanup_bus_message_unref_ sd_bus_message *pk = NULL;
         AsyncPolkitQuery *q;
-        const char *sender;
+        const char *sender, **k, **v;
         sd_bus_message_handler_t callback;
         void *userdata;
         int c;
@@ -463,12 +502,27 @@ int bus_verify_polkit_async(
 
         r = sd_bus_message_append(
                         pk,
-                        "(sa{sv})sa{ss}us",
+                        "(sa{sv})s",
                         "system-bus-name", 1, "name", "s", sender,
-                        action,
-                        0,
-                        !!interactive,
-                        NULL);
+                        action);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_open_container(pk, 'a', "{ss}");
+        if (r < 0)
+                return r;
+
+        STRV_FOREACH_PAIR(k, v, details) {
+                r = sd_bus_message_append(pk, "{ss}", *k, *v);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_bus_message_close_container(pk);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_append(pk, "us", !!interactive, NULL);
         if (r < 0)
                 return r;
 
@@ -511,6 +565,8 @@ void bus_verify_polkit_async_registry_free(Hashmap *registry) {
 #endif
 }
 
+/// UNNEEDED by elogind
+#if 0
 int bus_check_peercred(sd_bus *c) {
         struct ucred ucred;
         socklen_t l;
@@ -535,14 +591,14 @@ int bus_check_peercred(sd_bus *c) {
         return 1;
 }
 
-int bus_open_system_systemd(sd_bus **_bus) {
+int bus_connect_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);
+                return sd_bus_default_system(_bus);
 
         /* If we are root and kdbus is not available, then let's talk
          * directly to the system instance, instead of going via the
@@ -577,7 +633,7 @@ int bus_open_system_systemd(sd_bus **_bus) {
 
         r = sd_bus_start(bus);
         if (r < 0)
-                return sd_bus_open_system(_bus);
+                return sd_bus_default_system(_bus);
 
         r = bus_check_peercred(bus);
         if (r < 0)
@@ -589,7 +645,7 @@ int bus_open_system_systemd(sd_bus **_bus) {
         return 0;
 }
 
-int bus_open_user_systemd(sd_bus **_bus) {
+int bus_connect_user_systemd(sd_bus **_bus) {
         _cleanup_bus_unref_ sd_bus *bus = NULL;
         _cleanup_free_ char *ee = NULL;
         const char *e;
@@ -619,7 +675,7 @@ int bus_open_user_systemd(sd_bus **_bus) {
 
         e = secure_getenv("XDG_RUNTIME_DIR");
         if (!e)
-                return sd_bus_open_user(_bus);
+                return sd_bus_default_user(_bus);
 
         ee = bus_address_escape(e);
         if (!ee)
@@ -635,7 +691,7 @@ int bus_open_user_systemd(sd_bus **_bus) {
 
         r = sd_bus_start(bus);
         if (r < 0)
-                return sd_bus_open_user(_bus);
+                return sd_bus_default_user(_bus);
 
         r = bus_check_peercred(bus);
         if (r < 0)
@@ -646,6 +702,7 @@ int bus_open_user_systemd(sd_bus **_bus) {
 
         return 0;
 }
+#endif // 0
 
 int bus_print_property(const char *name, sd_bus_message *property, bool all) {
         char type;
@@ -1173,7 +1230,7 @@ int bus_map_all_properties(
         return bus_message_map_all_properties(m, map, userdata);
 }
 
-int bus_open_transport(BusTransport transport, const char *host, bool user, sd_bus **bus) {
+int bus_connect_transport(BusTransport transport, const char *host, bool user, sd_bus **bus) {
         int r;
 
         assert(transport >= 0);
@@ -1186,9 +1243,12 @@ int bus_open_transport(BusTransport transport, const char *host, bool user, sd_b
         switch (transport) {
 
         case BUS_TRANSPORT_LOCAL:
+/// elogind does not support a user bus
+#if 0
                 if (user)
                         r = sd_bus_default_user(bus);
                 else
+#endif // 0
                         r = sd_bus_default_system(bus);
 
                 break;
@@ -1210,7 +1270,7 @@ int bus_open_transport(BusTransport transport, const char *host, bool user, sd_b
 
 /// UNNEEDED by elogind
 #if 0
-int bus_open_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) {
+int bus_connect_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) {
         int r;
 
         assert(transport >= 0);
@@ -1224,9 +1284,9 @@ int bus_open_transport_systemd(BusTransport transport, const char *host, bool us
 
         case BUS_TRANSPORT_LOCAL:
                 if (user)
-                        r = bus_open_user_systemd(bus);
+                        r = bus_connect_user_systemd(bus);
                 else
-                        r = bus_open_system_systemd(bus);
+                        r = bus_connect_system_systemd(bus);
 
                 break;
 
@@ -1310,12 +1370,12 @@ int bus_log_parse_error(int r) {
         return log_error_errno(r, "Failed to parse bus message: %m");
 }
 
+/// UNNEEDED by elogind
+#if 0
 int bus_log_create_error(int r) {
         return log_error_errno(r, "Failed to create bus message: %m");
 }
 
-/// UNNEEDED by elogind
-#if 0
 int bus_parse_unit_info(sd_bus_message *message, UnitInfo *u) {
         assert(message);
         assert(u);
@@ -1385,6 +1445,17 @@ int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignmen
                         return bus_log_create_error(r);
 
                 return 0;
+        } else if (streq(field, "EnvironmentFile")) {
+                r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, "EnvironmentFiles");
+                if (r < 0)
+                        return r;
+
+                r = sd_bus_message_append(m, "v", "a(sb)", 1,
+                                          eq[0] == '-' ? eq + 1 : eq,
+                                          eq[0] == '-');
+                if (r < 0)
+                        return r;
+                return 0;
         }
 
         r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, field);
@@ -1392,9 +1463,11 @@ int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignmen
                 return bus_log_create_error(r);
 
         if (STR_IN_SET(field,
-                       "CPUAccounting", "MemoryAccounting", "BlockIOAccounting",
+                       "CPUAccounting", "MemoryAccounting", "BlockIOAccounting", "TasksAccounting",
                        "SendSIGHUP", "SendSIGKILL", "WakeSystem", "DefaultDependencies",
-                       "IgnoreSIGPIPE", "TTYVHangup", "TTYReset", "RemainAfterExit")) {
+                       "IgnoreSIGPIPE", "TTYVHangup", "TTYReset", "RemainAfterExit",
+                       "PrivateTmp", "PrivateDevices", "PrivateNetwork", "NoNewPrivileges",
+                       "SyslogLevelPrefix", "Delegate")) {
 
                 r = parse_boolean(eq);
                 if (r < 0) {
@@ -1405,20 +1478,50 @@ int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignmen
                 r = sd_bus_message_append(m, "v", "b", r);
 
         } else if (streq(field, "MemoryLimit")) {
-                off_t bytes;
+                uint64_t bytes;
 
+                if (isempty(eq) || streq(eq, "infinity"))
+                        bytes = (uint64_t) -1;
+                else {
                 r = parse_size(eq, 1024, &bytes);
                 if (r < 0) {
                         log_error("Failed to parse bytes specification %s", assignment);
                         return -EINVAL;
                 }
+                }
+
+                r = sd_bus_message_append(m, "v", "t", bytes);
+
+        } else if (streq(field, "TasksMax")) {
+                uint64_t n;
+
+                if (isempty(eq) || streq(eq, "infinity"))
+                        n = (uint64_t) -1;
+                else {
+                        r = safe_atou64(eq, &n);
+                        if (r < 0) {
+                                log_error("Failed to parse maximum tasks specification %s", assignment);
+                                return -EINVAL;
+                        }
+                }
 
-                r = sd_bus_message_append(m, "v", "t", (uint64_t) bytes);
+                r = sd_bus_message_append(m, "v", "t", n);
 
-        } else if (STR_IN_SET(field, "CPUShares", "BlockIOWeight")) {
+        } else if (STR_IN_SET(field, "CPUShares", "StartupCPUShares")) {
                 uint64_t u;
 
-                r = safe_atou64(eq, &u);
+                r = cg_cpu_shares_parse(eq, &u);
+                if (r < 0) {
+                        log_error("Failed to parse %s value %s.", field, eq);
+                        return -EINVAL;
+                }
+
+                r = sd_bus_message_append(m, "v", "t", u);
+
+        } else if (STR_IN_SET(field, "BlockIOWeight", "StartupBlockIOWeight")) {
+                uint64_t u;
+
+                r = cg_cpu_shares_parse(eq, &u);
                 if (r < 0) {
                         log_error("Failed to parse %s value %s.", field, eq);
                         return -EINVAL;
@@ -1430,10 +1533,34 @@ int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignmen
                               "User", "Group", "DevicePolicy", "KillMode",
                               "UtmpIdentifier", "UtmpMode", "PAMName", "TTYPath",
                               "StandardInput", "StandardOutput", "StandardError",
-                              "Description", "Slice", "Type"))
+                              "Description", "Slice", "Type", "WorkingDirectory",
+                              "RootDirectory", "SyslogIdentifier", "ProtectSystem",
+                              "ProtectHome"))
                 r = sd_bus_message_append(m, "v", "s", eq);
 
-        else if (streq(field, "DeviceAllow")) {
+        else if (streq(field, "SyslogLevel")) {
+                int level;
+
+                level = log_level_from_string(eq);
+                if (level < 0) {
+                        log_error("Failed to parse %s value %s.", field, eq);
+                        return -EINVAL;
+                }
+
+                r = sd_bus_message_append(m, "v", "i", level);
+
+        } else if (streq(field, "SyslogFacility")) {
+                int facility;
+
+                facility = log_facility_unshifted_from_string(eq);
+                if (facility < 0) {
+                        log_error("Failed to parse %s value %s.", field, eq);
+                        return -EINVAL;
+                }
+
+                r = sd_bus_message_append(m, "v", "i", facility);
+
+        } else if (streq(field, "DeviceAllow")) {
 
                 if (isempty(eq))
                         r = sd_bus_message_append(m, "v", "a(ss)", 0);
@@ -1463,7 +1590,7 @@ int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignmen
                         r = sd_bus_message_append(m, "v", "a(st)", 0);
                 else {
                         const char *path, *bandwidth, *e;
-                        off_t bytes;
+                        uint64_t bytes;
 
                         e = strchr(eq, ' ');
                         if (e) {
@@ -1485,7 +1612,7 @@ int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignmen
                                 return -EINVAL;
                         }
 
-                        r = sd_bus_message_append(m, "v", "a(st)", 1, path, (uint64_t) bytes);
+                        r = sd_bus_message_append(m, "v", "a(st)", 1, path, bytes);
                 }
 
         } else if (streq(field, "BlockIODeviceWeight")) {
@@ -1544,9 +1671,52 @@ int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignmen
 
                 r = sd_bus_message_append(m, "v", "i", i);
 
-        } else if (streq(field, "Environment")) {
+        } else if (STR_IN_SET(field, "Environment", "PassEnvironment")) {
+                const char *p;
+
+                r = sd_bus_message_open_container(m, 'v', "as");
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_message_open_container(m, 'a', "s");
+                if (r < 0)
+                        return bus_log_create_error(r);
 
-                r = sd_bus_message_append(m, "v", "as", 1, eq);
+                p = eq;
+
+                for (;;) {
+                        _cleanup_free_ char *word = NULL;
+
+                        r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_CUNESCAPE);
+                        if (r < 0) {
+                                log_error("Failed to parse Environment value %s", eq);
+                                return -EINVAL;
+                        }
+                        if (r == 0)
+                                break;
+
+                        if (streq(field, "Environment")) {
+                                if (!env_assignment_is_valid(word)) {
+                                        log_error("Invalid environment assignment: %s", word);
+                                        return -EINVAL;
+                                }
+                        } else {  /* PassEnvironment */
+                                if (!env_name_is_valid(word)) {
+                                        log_error("Invalid environment variable name: %s", word);
+                                        return -EINVAL;
+                                }
+                        }
+
+                        r = sd_bus_message_append_basic(m, 's', word);
+                        if (r < 0)
+                                return bus_log_create_error(r);
+                }
+
+                r = sd_bus_message_close_container(m);
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_message_close_container(m);
 
         } else if (streq(field, "KillSignal")) {
                 int sig;
@@ -1569,6 +1739,113 @@ int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignmen
                 }
 
                 r = sd_bus_message_append(m, "v", "t", u);
+        } else if (streq(field, "TimerSlackNSec")) {
+                nsec_t n;
+
+                r = parse_nsec(eq, &n);
+                if (r < 0) {
+                        log_error("Failed to parse %s value %s", field, eq);
+                        return -EINVAL;
+                }
+
+                r = sd_bus_message_append(m, "v", "t", n);
+        } else if (streq(field, "OOMScoreAdjust")) {
+                int oa;
+
+                r = safe_atoi(eq, &oa);
+                if (r < 0) {
+                        log_error("Failed to parse %s value %s", field, eq);
+                        return -EINVAL;
+                }
+
+                if (!oom_score_adjust_is_valid(oa)) {
+                        log_error("OOM score adjust value out of range");
+                        return -EINVAL;
+                }
+
+                r = sd_bus_message_append(m, "v", "i", oa);
+        } else if (STR_IN_SET(field, "ReadWriteDirectories", "ReadOnlyDirectories", "InaccessibleDirectories")) {
+                const char *p;
+
+                r = sd_bus_message_open_container(m, 'v', "as");
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_message_open_container(m, 'a', "s");
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                p = eq;
+
+                for (;;) {
+                        _cleanup_free_ char *word = NULL;
+                        int offset;
+
+                        r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES);
+                        if (r < 0) {
+                                log_error("Failed to parse %s value %s", field, eq);
+                                return -EINVAL;
+                        }
+                        if (r == 0)
+                                break;
+
+                        if (!utf8_is_valid(word)) {
+                                log_error("Failed to parse %s value %s", field, eq);
+                                return -EINVAL;
+                        }
+
+                        offset = word[0] == '-';
+                        if (!path_is_absolute(word + offset)) {
+                                log_error("Failed to parse %s value %s", field, eq);
+                                return -EINVAL;
+                        }
+
+                        path_kill_slashes(word + offset);
+
+                        r = sd_bus_message_append_basic(m, 's', word);
+                        if (r < 0)
+                                return bus_log_create_error(r);
+                }
+
+                r = sd_bus_message_close_container(m);
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_message_close_container(m);
+
+        } else if (streq(field, "RuntimeDirectory")) {
+                const char *p;
+
+                r = sd_bus_message_open_container(m, 'v', "as");
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_message_open_container(m, 'a', "s");
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                p = eq;
+
+                for (;;) {
+                        _cleanup_free_ char *word = NULL;
+
+                        r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to parse %s value %s", field, eq);
+
+                        if (r == 0)
+                                break;
+
+                        r = sd_bus_message_append_basic(m, 's', word);
+                        if (r < 0)
+                                return bus_log_create_error(r);
+                }
+
+                r = sd_bus_message_close_container(m);
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_message_close_container(m);
 
         } else {
                 log_error("Unknown assignment %s.", assignment);
@@ -1634,7 +1911,6 @@ static int match_job_removed(sd_bus_message *m, void *userdata, sd_bus_error *er
 
         return 0;
 }
-#endif // 0
 
 void bus_wait_for_jobs_free(BusWaitForJobs *d) {
         if (!d)
@@ -1653,8 +1929,6 @@ void bus_wait_for_jobs_free(BusWaitForJobs *d) {
         free(d);
 }
 
-/// UNNEEDED by elogind
-#if 0
 int bus_wait_for_jobs_new(sd_bus *bus, BusWaitForJobs **ret) {
         _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *d = NULL;
         int r;
@@ -1704,7 +1978,6 @@ int bus_wait_for_jobs_new(sd_bus *bus, BusWaitForJobs **ret) {
 
         return 0;
 }
-#endif // 0
 
 static int bus_process_wait(sd_bus *bus) {
         int r;
@@ -1862,11 +2135,8 @@ int bus_wait_for_jobs(BusWaitForJobs *d, bool quiet) {
                         log_debug_errno(q, "Got result %s/%m for job %s", strna(d->result), strna(d->name));
                 }
 
-                free(d->name);
-                d->name = NULL;
-
-                free(d->result);
-                d->result = NULL;
+                d->name = mfree(d->name);
+                d->result = mfree(d->result);
         }
 
         return r;
@@ -1884,8 +2154,16 @@ int bus_wait_for_jobs_add(BusWaitForJobs *d, const char *path) {
         return set_put_strdup(d->jobs, path);
 }
 
-/// UNNEEDED by elogind
-#if 0
+int bus_wait_for_jobs_one(BusWaitForJobs *d, const char *path, bool quiet) {
+        int r;
+
+        r = bus_wait_for_jobs_add(d, path);
+        if (r < 0)
+                return log_oom();
+
+        return bus_wait_for_jobs(d, quiet);
+}
+
 int bus_deserialize_and_dump_unit_file_changes(sd_bus_message *m, bool quiet, UnitFileChange **changes, unsigned *n_changes) {
         const char *type, *path, *source;
         int r;
@@ -1915,7 +2193,6 @@ int bus_deserialize_and_dump_unit_file_changes(sd_bus_message *m, bool quiet, Un
 
         return 0;
 }
-#endif // 0
 
 /**
  * bus_path_encode_unique() - encode unique object path
@@ -2043,6 +2320,7 @@ int bus_path_decode_unique(const char *path, const char *prefix, char **ret_send
         *ret_external = external;
         return 1;
 }
+#endif // 0
 
 bool is_kdbus_wanted(void) {
         _cleanup_free_ char *value = NULL;
@@ -2077,3 +2355,45 @@ bool is_kdbus_available(void) {
 
         return ioctl(fd, KDBUS_CMD_BUS_MAKE, &cmd) >= 0;
 }
+
+/// UNNEEDED by elogind
+#if 0
+int bus_property_get_rlimit(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        struct rlimit *rl;
+        uint64_t u;
+        rlim_t x;
+
+        assert(bus);
+        assert(reply);
+        assert(userdata);
+
+        rl = *(struct rlimit**) userdata;
+        if (rl)
+                x = rl->rlim_max;
+        else {
+                struct rlimit buf = {};
+                int z;
+
+                z = rlimit_from_string(strstr(property, "Limit"));
+                assert(z >= 0);
+
+                getrlimit(z, &buf);
+                x = buf.rlim_max;
+        }
+
+        /* rlim_t might have different sizes, let's map
+         * RLIMIT_INFINITY to (uint64_t) -1, so that it is the same on
+         * all archs */
+        u = x == RLIM_INFINITY ? (uint64_t) -1 : (uint64_t) x;
+
+        return sd_bus_message_append(reply, "t", u);
+}
+#endif // 0