#include <stdlib.h>
#include <dbus/dbus.h>
#include <string.h>
+#include <sys/epoll.h>
#include "log.h"
#include "dbus-common.h"
return -E2BIG;
}
- if (ucred.uid != 0)
+ if (ucred.uid != 0 && ucred.uid != geteuid())
return -EPERM;
return 1;
return 0;
}
-int bus_connect(DBusBusType t, DBusConnection **_bus, bool *private, DBusError *error) {
- DBusConnection *bus;
+int bus_connect(DBusBusType t, DBusConnection **_bus, bool *_private, DBusError *error) {
+ DBusConnection *bus = NULL;
int r;
+ bool private = true;
assert(_bus);
- /* If we are root, then let's not go via the bus */
if (geteuid() == 0 && t == DBUS_BUS_SYSTEM) {
+ /* If we are root, then let's talk directly to the
+ * system instance, instead of going via the bus */
+
+ bus = dbus_connection_open_private("unix:path=/run/systemd/private", error);
+ if (!bus)
+ return -EIO;
+
+ } else {
+ if (t == DBUS_BUS_SESSION) {
+ const char *e;
- if (!(bus = dbus_connection_open_private("unix:path=/run/systemd/private", error))) {
-#ifndef LEGACY
- dbus_error_free(error);
+ /* If we are supposed to talk to the instance,
+ * try via XDG_RUNTIME_DIR first, then
+ * fallback to normal bus access */
+
+ e = getenv("XDG_RUNTIME_DIR");
+ if (e) {
+ char *p;
+
+ if (asprintf(&p, "unix:path=%s/systemd/private", e) < 0)
+ return -ENOMEM;
+
+ bus = dbus_connection_open_private(p, NULL);
+ free(p);
+ }
+ }
- /* Retry with the pre v21 socket name, to ease upgrades */
- if (!(bus = dbus_connection_open_private("unix:abstract=/org/freedesktop/systemd1/private", error)))
-#endif
+ if (!bus) {
+ bus = dbus_bus_get_private(t, error);
+ if (!bus)
return -EIO;
+
+ private = false;
}
+ }
- dbus_connection_set_exit_on_disconnect(bus, FALSE);
+ dbus_connection_set_exit_on_disconnect(bus, FALSE);
+ if (private) {
if (bus_check_peercred(bus) < 0) {
dbus_connection_close(bus);
dbus_connection_unref(bus);
dbus_set_error_const(error, DBUS_ERROR_ACCESS_DENIED, "Failed to verify owner of bus.");
return -EACCES;
}
-
- if (private)
- *private = true;
-
- } else {
- if (!(bus = dbus_bus_get_private(t, error)))
- return -EIO;
-
- dbus_connection_set_exit_on_disconnect(bus, FALSE);
-
- if (private)
- *private = false;
}
- if ((r = sync_auth(bus, error)) < 0) {
+ r = sync_auth(bus, error);
+ if (r < 0) {
dbus_connection_close(bus);
dbus_connection_unref(bus);
return r;
}
+ if (_private)
+ *_private = private;
+
*_bus = bus;
return 0;
}
}
int bus_property_append_strv(DBusMessageIter *i, const char *property, void *data) {
- DBusMessageIter sub;
char **t = data;
assert(i);
assert(property);
- if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
- return -ENOMEM;
-
- STRV_FOREACH(t, t)
- if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, t))
- return -ENOMEM;
-
- if (!dbus_message_iter_close_container(i, &sub))
- return -ENOMEM;
-
- return 0;
+ return bus_append_strv_iter(i, t);
}
int bus_property_append_bool(DBusMessageIter *i, const char *property, void *data) {
assert(property);
assert(data);
- /* Let's ensure that pid_t is actually 64bit, and hence this
+ /* Let's ensure that usec_t is actually 64bit, and hence this
* function can be used for usec_t */
assert_cc(sizeof(uint64_t) == sizeof(usec_t));
assert(property);
assert(data);
- /* Let's ensure that pid_t and mode_t is actually 32bit, and
- * hence this function can be used for pid_t/mode_t */
+ /* Let's ensure that pid_t, mode_t, uid_t, gid_t are actually
+ * 32bit, and hence this function can be used for
+ * pid_t/mode_t/uid_t/gid_t */
assert_cc(sizeof(uint32_t) == sizeof(pid_t));
assert_cc(sizeof(uint32_t) == sizeof(mode_t));
assert_cc(sizeof(uint32_t) == sizeof(unsigned));
+ assert_cc(sizeof(uint32_t) == sizeof(uid_t));
+ assert_cc(sizeof(uint32_t) == sizeof(gid_t));
if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, data))
return -ENOMEM;
return NULL;
}
+
+uint32_t bus_flags_to_events(DBusWatch *bus_watch) {
+ unsigned flags;
+ uint32_t events = 0;
+
+ assert(bus_watch);
+
+ /* no watch flags for disabled watches */
+ if (!dbus_watch_get_enabled(bus_watch))
+ return 0;
+
+ flags = dbus_watch_get_flags(bus_watch);
+
+ if (flags & DBUS_WATCH_READABLE)
+ events |= EPOLLIN;
+ if (flags & DBUS_WATCH_WRITABLE)
+ events |= EPOLLOUT;
+
+ return events | EPOLLHUP | EPOLLERR;
+}
+
+unsigned bus_events_to_flags(uint32_t events) {
+ unsigned flags = 0;
+
+ if (events & EPOLLIN)
+ flags |= DBUS_WATCH_READABLE;
+ if (events & EPOLLOUT)
+ flags |= DBUS_WATCH_WRITABLE;
+ if (events & EPOLLHUP)
+ flags |= DBUS_WATCH_HANGUP;
+ if (events & EPOLLERR)
+ flags |= DBUS_WATCH_ERROR;
+
+ return flags;
+}
+
+int bus_parse_strv(DBusMessage *m, char ***_l) {
+ DBusMessageIter iter;
+
+ assert(m);
+ assert(_l);
+
+ if (!dbus_message_iter_init(m, &iter))
+ return -EINVAL;
+
+ return bus_parse_strv_iter(&iter, _l);
+}
+
+int bus_parse_strv_iter(DBusMessageIter *iter, char ***_l) {
+ DBusMessageIter sub;
+ unsigned n = 0, i = 0;
+ char **l;
+
+ assert(iter);
+ assert(_l);
+
+ if (dbus_message_iter_get_arg_type(iter) != DBUS_TYPE_ARRAY ||
+ dbus_message_iter_get_element_type(iter) != DBUS_TYPE_STRING)
+ return -EINVAL;
+
+ dbus_message_iter_recurse(iter, &sub);
+
+ while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
+ n++;
+ dbus_message_iter_next(&sub);
+ }
+
+ if (!(l = new(char*, n+1)))
+ return -ENOMEM;
+
+ dbus_message_iter_recurse(iter, &sub);
+
+ while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
+ const char *s;
+
+ assert_se(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
+ dbus_message_iter_get_basic(&sub, &s);
+
+ if (!(l[i++] = strdup(s))) {
+ strv_free(l);
+ return -ENOMEM;
+ }
+
+ dbus_message_iter_next(&sub);
+ }
+
+ assert(i == n);
+ l[i] = NULL;
+
+ if (_l)
+ *_l = l;
+
+ return 0;
+}
+
+int bus_append_strv_iter(DBusMessageIter *iter, char **l) {
+ DBusMessageIter sub;
+
+ assert(iter);
+
+ if (!dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY, "s", &sub))
+ return -ENOMEM;
+
+ STRV_FOREACH(l, l)
+ if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, l))
+ return -ENOMEM;
+
+ if (!dbus_message_iter_close_container(iter, &sub))
+ return -ENOMEM;
+
+ return 0;
+}
+
+int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) {
+
+ assert(iter);
+ assert(data);
+
+ if (dbus_message_iter_get_arg_type(iter) != type)
+ return -EIO;
+
+ dbus_message_iter_get_basic(iter, data);
+
+ if (!dbus_message_iter_next(iter) != !next)
+ return -EIO;
+
+ return 0;
+}
+
+int generic_print_property(const char *name, DBusMessageIter *iter, bool all) {
+ assert(name);
+ assert(iter);
+
+ switch (dbus_message_iter_get_arg_type(iter)) {
+
+ case DBUS_TYPE_STRING: {
+ const char *s;
+ dbus_message_iter_get_basic(iter, &s);
+
+ if (all || !isempty(s))
+ printf("%s=%s\n", name, s);
+
+ return 1;
+ }
+
+ case DBUS_TYPE_BOOLEAN: {
+ dbus_bool_t b;
+
+ dbus_message_iter_get_basic(iter, &b);
+ printf("%s=%s\n", name, yes_no(b));
+
+ return 1;
+ }
+
+ case DBUS_TYPE_UINT64: {
+ uint64_t u;
+ dbus_message_iter_get_basic(iter, &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));
+ } else
+ printf("%s=%llu\n", name, (unsigned long long) u);
+
+ return 1;
+ }
+
+ case DBUS_TYPE_UINT32: {
+ uint32_t u;
+ dbus_message_iter_get_basic(iter, &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 DBUS_TYPE_INT32: {
+ int32_t i;
+ dbus_message_iter_get_basic(iter, &i);
+
+ printf("%s=%i\n", name, (int) i);
+ return 1;
+ }
+
+ case DBUS_TYPE_DOUBLE: {
+ double d;
+ dbus_message_iter_get_basic(iter, &d);
+
+ printf("%s=%g\n", name, d);
+ return 1;
+ }
+
+ case DBUS_TYPE_ARRAY:
+
+ if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
+ DBusMessageIter sub;
+ bool space = false;
+
+ dbus_message_iter_recurse(iter, &sub);
+ if (all ||
+ dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
+ printf("%s=", name);
+
+ while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
+ const char *s;
+
+ assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
+ dbus_message_iter_get_basic(&sub, &s);
+ printf("%s%s", space ? " " : "", s);
+
+ space = true;
+ dbus_message_iter_next(&sub);
+ }
+
+ puts("");
+ }
+
+ return 1;
+
+ } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) {
+ DBusMessageIter sub;
+
+ dbus_message_iter_recurse(iter, &sub);
+ if (all ||
+ dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
+ printf("%s=", name);
+
+ while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
+ uint8_t u;
+
+ assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE);
+ dbus_message_iter_get_basic(&sub, &u);
+ printf("%02x", u);
+
+ dbus_message_iter_next(&sub);
+ }
+
+ puts("");
+ }
+
+ return 1;
+ }
+
+ break;
+ }
+
+ return 0;
+}
~ianmdlvl / elogind.git / blobdiff