Merge pull request #9776 from keszybz/sd-bus-docs
More man pages for sd-bus and related changes
This commit is contained in:
commit
27d4866ad8
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@ -0,0 +1,11 @@
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#include <stdio.h>
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#include <systemd/sd-id128.h>
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#define OUR_APPLICATION_ID SD_ID128_MAKE(c2,73,27,73,23,db,45,4e,a6,3b,b9,6e,79,b5,3e,97)
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int main(int argc, char *argv[]) {
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sd_id128_t id;
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sd_id128_get_machine_app_specific(OUR_APPLICATION_ID, &id);
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printf("Our application ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(id));
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return 0;
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}
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@ -0,0 +1,25 @@
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#include <stdio.h>
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#include <string.h>
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#include <systemd/sd-journal.h>
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int main(int argc, char *argv[]) {
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sd_journal *j;
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const void *d;
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size_t l;
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int r;
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r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY);
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if (r < 0) {
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fprintf(stderr, "Failed to open journal: %s\n", strerror(-r));
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return 1;
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}
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r = sd_journal_query_unique(j, "_SYSTEMD_UNIT");
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if (r < 0) {
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fprintf(stderr, "Failed to query journal: %s\n", strerror(-r));
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return 1;
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}
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SD_JOURNAL_FOREACH_UNIQUE(j, d, l)
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printf("%.*s\n", (int) l, (const char*) d);
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sd_journal_close(j);
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return 0;
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}
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@ -0,0 +1,64 @@
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <systemd/sd-bus.h>
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#define _cleanup_(f) __attribute__((cleanup(f)))
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/* This is equivalent to:
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* busctl call org.freedesktop.systemd1 /org/freedesktop/systemd1 \
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* org.freedesktop.systemd1.Manager GetUnitByPID $$
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*
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* Compile with 'cc -lsystemd print-unit-path.c'
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*/
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#define DESTINATION "org.freedesktop.systemd1"
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#define PATH "/org/freedesktop/systemd1"
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#define INTERFACE "org.freedesktop.systemd1.Manager"
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#define MEMBER "GetUnitByPID"
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static int log_error(int error, const char *message) {
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fprintf(stderr, "%s: %s\n", message, strerror(-error));
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return error;
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}
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static int print_unit_path(sd_bus *bus) {
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_cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
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int r;
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r = sd_bus_message_new_method_call(bus, &m,
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DESTINATION, PATH, INTERFACE, MEMBER);
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if (r < 0)
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return log_error(r, "Failed to create bus message");
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r = sd_bus_message_append(m, "u", (unsigned) getpid());
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if (r < 0)
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return log_error(r, "Failed to append to bus message");
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r = sd_bus_call(bus, m, -1, &error, &reply);
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if (r < 0)
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return log_error(r, "Call failed");
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const char *ans;
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r = sd_bus_message_read(reply, "o", &ans);
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if (r < 0)
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return log_error(r, "Failed to read reply");
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printf("Unit path is \"%s\".\n", ans);
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return 0;
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}
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int main(int argc, char **argv) {
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_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
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int r;
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r = sd_bus_open_system(&bus);
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if (r < 0)
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return log_error(r, "Failed to acquire bus");
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print_unit_path(bus);
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}
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@ -166,7 +166,10 @@ manpages = [
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'sd_bus_open_system',
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'sd_bus_open_system_machine',
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'sd_bus_open_system_remote',
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'sd_bus_open_user'],
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'sd_bus_open_system_with_description',
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'sd_bus_open_user',
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'sd_bus_open_user_with_description',
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'sd_bus_open_with_description'],
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''],
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['sd_bus_error',
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'3',
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@ -210,15 +213,53 @@ manpages = [
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'3',
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['sd_bus_message_get_realtime_usec', 'sd_bus_message_get_seqnum'],
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''],
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['sd_bus_message_get_type',
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'3',
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['sd_bus_message_is_method_call',
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'sd_bus_message_is_method_error',
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'sd_bus_message_is_signal'],
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''],
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['sd_bus_message_new',
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'3',
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['SD_BUS_MESSAGE_METHOD_CALL',
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'SD_BUS_MESSAGE_METHOD_ERROR',
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'SD_BUS_MESSAGE_METHOD_RETURN',
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'SD_BUS_MESSAGE_SIGNAL',
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'sd_bus_message_get_bus',
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'sd_bus_message_ref',
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'sd_bus_message_unref',
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'sd_bus_message_unrefp'],
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''],
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['sd_bus_message_new_method_call',
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'3',
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['sd_bus_message_new_method_return'],
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''],
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['sd_bus_message_new_method_error',
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'3',
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['sd_bus_message_new_method_errno',
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'sd_bus_message_new_method_errnof',
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'sd_bus_message_new_method_errorf'],
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''],
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['sd_bus_message_new_signal', '3', [], ''],
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['sd_bus_message_read', '3', ['sd_bus_message_readv'], ''],
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['sd_bus_message_read_basic', '3', [], ''],
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['sd_bus_message_set_destination', '3', ['sd_bus_message_set_sender'], ''],
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['sd_bus_message_rewind', '3', [], ''],
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['sd_bus_message_set_destination',
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'3',
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['sd_bus_message_get_destination',
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'sd_bus_message_get_interface',
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'sd_bus_message_get_member',
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'sd_bus_message_get_path',
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'sd_bus_message_get_sender',
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'sd_bus_message_set_sender'],
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''],
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['sd_bus_message_set_expect_reply',
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'3',
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['sd_bus_message_get_auto_start',
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'sd_bus_message_get_expect_reply',
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'sd_bus_message_set_auto_start'],
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''],
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['sd_bus_message_verify_type', '3', [], ''],
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['sd_bus_negotiate_fds',
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'3',
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['sd_bus_negotiate_creds', 'sd_bus_negotiate_timestamp'],
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@ -252,6 +293,11 @@ manpages = [
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''],
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['sd_bus_set_sender', '3', ['sd_bus_get_sender'], ''],
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['sd_bus_set_watch_bind', '3', ['sd_bus_get_watch_bind'], ''],
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['sd_bus_slot_ref',
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'3',
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['sd_bus_slot_get_bus', 'sd_bus_slot_unref', 'sd_bus_slot_unrefp'],
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''],
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['sd_bus_slot_set_description', '3', ['sd_bus_slot_get_description'], ''],
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['sd_bus_slot_set_destroy_callback',
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'3',
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['sd_bus_destroy_t',
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@ -260,6 +306,7 @@ manpages = [
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'sd_bus_track_set_destroy_callback'],
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''],
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['sd_bus_slot_set_floating', '3', ['sd_bus_slot_get_floating'], ''],
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['sd_bus_slot_set_userdata', '3', ['sd_bus_slot_get_userdata'], ''],
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['sd_bus_track_add_name',
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'3',
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['sd_bus_track_add_sender',
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@ -60,10 +60,17 @@
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<citerefentry><refentrytitle>sd_bus_message_copy</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_get_cookie</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_get_monotonic_usec</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_get_type</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_new_method_call</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_new_method_error</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_new_signal</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_read_basic</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_read</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_rewind</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_set_destination</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_set_expect_reply</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_verify_type</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_negotiate_fds</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_path_encode</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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@ -74,8 +81,10 @@
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<citerefentry><refentrytitle>sd_bus_set_description</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_set_sender</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_set_watch_bind</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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<citerefentry><refentrytitle>sd_bus_set_slot_destroy_callback</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_set_slot_floating</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_slot_set_description</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_slot_set_destroy_callback</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_slot_set_floating</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_slot_set_userdata</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_track_add_name</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_track_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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</literallayout>
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@ -24,8 +24,11 @@
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<refname>sd_bus_default_system</refname>
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<refname>sd_bus_open</refname>
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<refname>sd_bus_open_with_description</refname>
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<refname>sd_bus_open_user</refname>
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<refname>sd_bus_open_user_with_description</refname>
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<refname>sd_bus_open_system</refname>
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<refname>sd_bus_open_system_with_description</refname>
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<refname>sd_bus_open_system_remote</refname>
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<refname>sd_bus_open_system_machine</refname>
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@ -56,16 +59,34 @@
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<paramdef>sd_bus **<parameter>bus</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_open_with_description</function></funcdef>
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<paramdef>sd_bus **<parameter>bus</parameter></paramdef>
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<paramdef>const char *<parameter>description</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_open_user</function></funcdef>
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<paramdef>sd_bus **<parameter>bus</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_open_user_with_description</function></funcdef>
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<paramdef>sd_bus **<parameter>bus</parameter></paramdef>
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<paramdef>const char *<parameter>description</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_open_system</function></funcdef>
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<paramdef>sd_bus **<parameter>bus</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_open_system_with_description</function></funcdef>
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<paramdef>sd_bus **<parameter>bus</parameter></paramdef>
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<paramdef>const char *<parameter>description</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_open_system_remote</function></funcdef>
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<paramdef>sd_bus **<parameter>bus</parameter></paramdef>
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|
@ -126,6 +147,20 @@
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<function>sd_bus_default_system()</function> to connect to the
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user or system buses.</para>
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<para><function>sd_bus_open_with_description()</function>,
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<function>sd_bus_open_user_with_description()</function>, and
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<function>sd_bus_open_system_with_description()</function> are similar to
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<function>sd_bus_open()</function>, <function>sd_bus_open_user()</function>, and
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<function>sd_bus_open_system()</function>, but allow a description string to be set, see
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<citerefentry><refentrytitle>sd_bus_set_description</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
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<parameter>description</parameter> may be <constant>NULL</constant>, in which case this function
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is equivalent to <function>sd_bus_open()</function>. This description string is used in log
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messages about the bus object, and including a "name" for the bus makes them easier to
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understand. Some messages are emitted during bus initialization, hence using this function is
|
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prefereable to setting the description later with
|
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<function>sd_bus_open_with_description()</function>. The argument is copied internally and will
|
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not be referenced after the function returns.</para>
|
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|
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<para>If the <varname>$DBUS_SESSION_BUS_ADDRESS</varname> environment
|
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variable is set
|
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(cf. <citerefentry project='man-pages'><refentrytitle>environ</refentrytitle><manvolnum>7</manvolnum></citerefentry>),
|
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|
|
|
@ -0,0 +1,129 @@
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<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
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<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
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|
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<refentry id="sd_bus_message_get_type" xmlns:xi="http://www.w3.org/2001/XInclude">
|
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|
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<refentryinfo>
|
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<title>sd_bus_message_get_type</title>
|
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<productname>systemd</productname>
|
||||
</refentryinfo>
|
||||
|
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<refmeta>
|
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<refentrytitle>sd_bus_message_get_type</refentrytitle>
|
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<manvolnum>3</manvolnum>
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
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<refname>sd_bus_message_get_type</refname>
|
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<refname>sd_bus_message_is_signal</refname>
|
||||
<refname>sd_bus_message_is_method_call</refname>
|
||||
<refname>sd_bus_message_is_method_error</refname>
|
||||
|
||||
<refpurpose>Query bus message addressing metadata</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<funcsynopsis>
|
||||
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int <function>sd_bus_message_get_type</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
<paramdef>uint8_t *<parameter>type</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int <function>sd_bus_message_is_signal</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>interface</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>member</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int <function>sd_bus_message_is_method_call</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>interface</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>member</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int <function>sd_bus_message_is_method_error</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>name</parameter></paramdef>
|
||||
</funcprototype>
|
||||
</funcsynopsis>
|
||||
|
||||
</refsynopsisdiv>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
|
||||
<para><function>sd_bus_message_get_type()</function> returns the type of a message in the output
|
||||
parameter <parameter>type</parameter>, one of <constant>SD_BUS_MESSAGE_METHOD_CALL</constant>,
|
||||
<constant>SD_BUS_MESSAGE_METHOD_RETURN</constant>,
|
||||
<constant>SD_BUS_MESSAGE_METHOD_ERROR</constant>, <constant>SD_BUS_MESSAGE_SIGNAL</constant>.
|
||||
This type is either specified as a parameter when the message is created using
|
||||
<citerefentry><refentrytitle>sd_bus_set_message_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
or is set automatically when the message is created using
|
||||
<citerefentry><refentrytitle>sd_bus_set_message_new_signal</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_set_message_new_method_call</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_set_message_new_method_error</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
and similar functions.
|
||||
</para>
|
||||
|
||||
<para><function>sd_bus_message_is_signal()</function> checks if message <parameter>m</parameter>
|
||||
is a signal message. If <parameter>interface</parameter> is non-null, it also checks if the
|
||||
message has the same interface set. If <parameter>member</parameter> is non-null, it also checks
|
||||
if the message has the same member set. Also see
|
||||
<citerefentry><refentrytitle>sd_bus_set_message_new_signal</refentrytitle><manvolnum>3</manvolnum></citerefentry>. It returns true when all checks pass.</para>
|
||||
|
||||
<para><function>sd_bus_message_is_method_call()</function> checks if message <parameter>m</parameter>
|
||||
is a method call message. If <parameter>interface</parameter> is non-null, it also checks if the
|
||||
message has the same interface set. If <parameter>member</parameter> is non-null, it also checks
|
||||
if the message has the same member set. Also see
|
||||
<citerefentry><refentrytitle>sd_bus_set_message_new_method_call</refentrytitle><manvolnum>3</manvolnum></citerefentry>. It returns true when all checks pass.</para>
|
||||
|
||||
<para><function>sd_bus_message_is_method_error()</function> checks if message <parameter>m</parameter>
|
||||
is an error reply message. If <parameter>name</parameter> is non-null, it also checks if the
|
||||
message has the same error identifier set. Also see
|
||||
<citerefentry><refentrytitle>sd_bus_set_message_new_method_error</refentrytitle><manvolnum>3</manvolnum></citerefentry>. It returns true when all checks pass.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Return Value</title>
|
||||
|
||||
<para>On success, those functions return 0 or a positive
|
||||
integer. On failure, it returns a negative errno-style error code.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Errors</title>
|
||||
|
||||
<para>Returned errors may indicate the following problems:</para>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><constant>-EINVAL</constant></term>
|
||||
|
||||
<listitem><para>The <parameter>message</parameter> parameter or the output parameter are
|
||||
<constant>NULL</constant>.</para></listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</refsect1>
|
||||
|
||||
<xi:include href="libsystemd-pkgconfig.xml" />
|
||||
|
||||
<refsect1>
|
||||
<title>See Also</title>
|
||||
|
||||
<para>
|
||||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_message_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_message_set_destination</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
</refentry>
|
|
@ -0,0 +1,189 @@
|
|||
<?xml version='1.0'?>
|
||||
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
||||
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||||
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
||||
|
||||
<refentry id="sd_bus_message_new" xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
<refentryinfo>
|
||||
<title>sd_bus_message_new</title>
|
||||
<productname>systemd</productname>
|
||||
</refentryinfo>
|
||||
|
||||
<refmeta>
|
||||
<refentrytitle>sd_bus_message_new</refentrytitle>
|
||||
<manvolnum>3</manvolnum>
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>sd_bus_message_new</refname>
|
||||
<refname>sd_bus_message_ref</refname>
|
||||
<refname>sd_bus_message_unref</refname>
|
||||
<refname>sd_bus_message_unrefp</refname>
|
||||
<refname>SD_BUS_MESSAGE_METHOD_CALL</refname>
|
||||
<refname>SD_BUS_MESSAGE_METHOD_RETURN</refname>
|
||||
<refname>SD_BUS_MESSAGE_METHOD_ERROR</refname>
|
||||
<refname>SD_BUS_MESSAGE_SIGNAL</refname>
|
||||
<refname>sd_bus_message_get_bus</refname>
|
||||
|
||||
<refpurpose>Create a new bus message object and create or destroy references to it</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<funcsynopsis>
|
||||
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
|
||||
|
||||
<funcsynopsisinfo><token>enum</token> {
|
||||
<constant>SD_BUS_MESSAGE_METHOD_CALL</constant>,
|
||||
<constant>SD_BUS_MESSAGE_METHOD_RETURN</constant>,
|
||||
<constant>SD_BUS_MESSAGE_METHOD_ERROR</constant>,
|
||||
<constant>SD_BUS_MESSAGE_SIGNAL</constant>,
|
||||
};</funcsynopsisinfo>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int <function>sd_bus_message_new</function></funcdef>
|
||||
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
|
||||
<paramdef>sd_bus_message **<parameter>m</parameter></paramdef>
|
||||
<paramdef>uint8_t <parameter>type</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>sd_bus_message *<function>sd_bus_message_ref</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>m</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>sd_bus_message *<function>sd_bus_message_unref</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>m</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>void <function>sd_bus_message_unrefp</function></funcdef>
|
||||
<paramdef>sd_bus_message **<parameter>mp</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>sd_bus *<function>sd_bus_message_get_bus</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>m</parameter></paramdef>
|
||||
</funcprototype>
|
||||
</funcsynopsis>
|
||||
</refsynopsisdiv>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
|
||||
<para><function>sd_bus_message_new()</function> creates a new bus message object attached to the
|
||||
bus <parameter>bus</parameter> and returns it in the output parameter <parameter>m</parameter>.
|
||||
This object is reference-counted, and will be destroyed when all references are gone. Initially,
|
||||
the caller of this function owns the sole reference to the message object. Note that the message
|
||||
object holds a reference to the bus object, so the bus object will not be destroyed as long as
|
||||
the message exists.</para>
|
||||
|
||||
<para>Note: this is a low-level call. In most cases functions like
|
||||
<citerefentry><refentrytitle>sd_bus_message_new_method_call</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_message_new_method_error</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_message_new_method_return</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
and <citerefentry><refentrytitle>sd_bus_message_new_signal</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
that create a message of a certain type and initialize various fields are easier to use.</para>
|
||||
|
||||
<para>The <parameter>type</parameter> parameter specifies the type of the message. It must be
|
||||
one of <constant>SD_BUS_MESSAGE_METHOD_CALL</constant> — a method call,
|
||||
<constant>SD_BUS_MESSAGE_METHOD_RETURN</constant> — a method call reply,
|
||||
<constant>SD_BUS_MESSAGE_METHOD_ERROR</constant> — an error reply to a method call,
|
||||
<constant>SD_BUS_MESSAGE_SIGNAL</constant> — a broadcast message with no reply.
|
||||
</para>
|
||||
|
||||
<para>The flag to allow interactive authorization is initialized based on the current value set
|
||||
in the bus object, see
|
||||
<citerefentry><refentrytitle>sd_bus_set_allow_interactive_authorization</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
|
||||
This may be changed using
|
||||
<citerefentry><refentrytitle>sd_bus_message_set_allow_interactive_authorization</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
|
||||
</para>
|
||||
|
||||
<para><function>sd_bus_message_ref()</function> increases the reference counter of
|
||||
<parameter>m</parameter> by one.</para>
|
||||
|
||||
<para><function>sd_bus_message_unref()</function> decreases the reference counter of
|
||||
<parameter>m</parameter> by one. Once the reference count has dropped to zero, message object is
|
||||
destroyed and cannot be used anymore, so further calls to
|
||||
<function>sd_bus_message_ref()</function> or <function>sd_bus_message_unref()</function> are
|
||||
illegal.</para>
|
||||
|
||||
<para><function>sd_bus_message_unrefp()</function> is similar to
|
||||
<function>sd_bus_message_unref()</function> but takes a pointer to a
|
||||
pointer to an <type>sd_bus_message</type> object. This call is useful in
|
||||
conjunction with GCC's and LLVM's <ulink
|
||||
url="https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html">Clean-up
|
||||
Variable Attribute</ulink>. See
|
||||
<citerefentry><refentrytitle>sd_bus_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
for an example how to use the cleanup attribute.</para>
|
||||
|
||||
<para><function>sd_bus_message_ref()</function> and <function>sd_bus_message_unref()</function>
|
||||
execute no operation if the passed in bus object address is
|
||||
<constant>NULL</constant>. <function>sd_bus_message_unrefp()</function> will first dereference
|
||||
its argument, which must not be <constant>NULL</constant>, and will execute no operation if
|
||||
<emphasis>that</emphasis> is <constant>NULL</constant>.
|
||||
</para>
|
||||
|
||||
<para><function>sd_bus_message_get_bus()</function> returns the bus object that message
|
||||
<parameter>m</parameter> is attached to.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Return Value</title>
|
||||
|
||||
<para>On success, <function>sd_bus_message_new()</function> returns 0 or a positive integer. On
|
||||
failure, it returns a negative errno-style error code.</para>
|
||||
|
||||
<para><function>sd_bus_message_ref()</function> always returns the argument.
|
||||
</para>
|
||||
|
||||
<para><function>sd_bus_message_unref()</function> always returns
|
||||
<constant>NULL</constant>.</para>
|
||||
|
||||
<para><function>sd_bus_message_get_bus()</function> always returns the bus object.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Errors</title>
|
||||
|
||||
<para>Returned errors may indicate the following problems:</para>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><constant>-EINVAL</constant></term>
|
||||
|
||||
<listitem><para>Specified <parameter>type</parameter> is invalid.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><constant>-ENOTCONN</constant></term>
|
||||
|
||||
<listitem><para>The bus parameter <parameter>bus</parameter> is <constant>NULL</constant> or
|
||||
the bus is not connected.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><constant>-ENOMEM</constant></term>
|
||||
|
||||
<listitem><para>Memory allocation failed.</para></listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</refsect1>
|
||||
|
||||
<xi:include href="libsystemd-pkgconfig.xml" />
|
||||
|
||||
<refsect1>
|
||||
<title>See Also</title>
|
||||
|
||||
<para>
|
||||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_message_new_method_call</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_message_new_method_error</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_message_new_method_return</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_message_new_signal</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
</refentry>
|
|
@ -0,0 +1,166 @@
|
|||
<?xml version='1.0'?>
|
||||
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
||||
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||||
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
||||
|
||||
<refentry id="sd_bus_message_new_method_call"
|
||||
xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
|
||||
<refentryinfo>
|
||||
<title>sd_bus_message_new_method_call</title>
|
||||
<productname>systemd</productname>
|
||||
</refentryinfo>
|
||||
|
||||
<refmeta>
|
||||
<refentrytitle>sd_bus_message_new_method_call</refentrytitle>
|
||||
<manvolnum>3</manvolnum>
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>sd_bus_message_new_method_call</refname>
|
||||
<refname>sd_bus_message_new_method_return</refname>
|
||||
|
||||
<refpurpose>Create a method call message</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<funcsynopsis>
|
||||
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int sd_bus_message_new_method_call</funcdef>
|
||||
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
|
||||
<paramdef>sd_bus_message **<parameter>m</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>destination</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>path</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>interface</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>member</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int sd_bus_message_new_method_return</funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>call</parameter></paramdef>
|
||||
<paramdef>sd_bus_message **<parameter>m</parameter></paramdef>
|
||||
</funcprototype>
|
||||
</funcsynopsis>
|
||||
</refsynopsisdiv>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
|
||||
<para>The <function>sd_bus_message_new_method_call()</function> function creates a new bus
|
||||
message object that encapsulates a D-Bus method call, and returns it in the
|
||||
<parameter>m</parameter> output parameter. The call will be made on the destination
|
||||
<parameter>destination</parameter>, path <parameter>path</parameter>, on the interface
|
||||
<parameter>interface</parameter>, member <parameter>member</parameter>.</para>
|
||||
|
||||
<para>Briefly, the <emphasis>destination</emphasis> is a dot-separated name that identifies a
|
||||
service connected to the bus. The <emphasis>path</emphasis> is a slash-separated identifier of
|
||||
an object within the destination that resembles a file system path. The meaning of this path is
|
||||
defined by the destination. The <emphasis>interface</emphasis> is a dot-separated name that
|
||||
resembles a Java interface name that identifies a group of methods and signals supported by the
|
||||
object identified by path. Methods and signals are collectively called
|
||||
<emphasis>members</emphasis> and are identified by a simple name composed of ASCII letters,
|
||||
numbers, and underscores. See the <ulink
|
||||
url="https://dbus.freedesktop.org/doc/dbus-tutorial.html#concepts">D-Bus Tutorial</ulink> for an
|
||||
in-depth explanation.</para>
|
||||
|
||||
<para>The <parameter>destination</parameter> parameter may be <constant>NULL</constant>. The
|
||||
<parameter>interface</parameter> parameter may be <constant>NULL</constant>, if the destination
|
||||
has only a single member with the given name and there is no ambiguity if the interface name is
|
||||
omitted.</para>
|
||||
|
||||
<para>The <function>sd_bus_message_new_method_call()</function> function creates a new bus
|
||||
message object that is a reply to the method call <parameter>call</parameter> and returns it in
|
||||
the <parameter>m</parameter> output parameter. The <parameter>call</parameter> parameter must be
|
||||
a method call message. The sender of <parameter>call</parameter> is used as the destination.
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Return Value</title>
|
||||
|
||||
<para>This function returns 0 if the message object was successfully created, and a negative
|
||||
errno-style error code otherwise.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1 id='errors'>
|
||||
<title>Errors</title>
|
||||
|
||||
<para>Returned errors may indicate the following problems:</para>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><constant>-EINVAL</constant></term>
|
||||
|
||||
<listitem><para>The output parameter <parameter>m</parameter> is
|
||||
<constant>NULL</constant>.</para>
|
||||
|
||||
<para>The <parameter>destination</parameter> parameter is non-null and is not a valid D-Bus
|
||||
service name (<literal>org.somewhere.Something</literal>), the <parameter>path</parameter>
|
||||
parameter is not a valid D-Bus path (<literal>/an/object/path</literal>), the
|
||||
<parameter>interface</parameter> parameter is non-null and is not a valid D-Bus interface
|
||||
name (<literal>an.interface.name</literal>), or the <parameter>member</parameter> parameter
|
||||
is not a valid D-Bus member (<literal>Name</literal>).</para>
|
||||
|
||||
<para>The <parameter>call</parameter> parameter is not a method call object.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><constant>-ENOTCONN</constant></term>
|
||||
|
||||
<listitem><para>The bus parameter <parameter>bus</parameter> is <constant>NULL</constant> or
|
||||
the bus is not connected.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><constant>-ENOMEM</constant></term>
|
||||
|
||||
<listitem><para>Memory allocation failed.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><constant>-EPERM</constant></term>
|
||||
|
||||
<listitem>
|
||||
<para>The <parameter>call</parameter> parameter is not sealed.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><constant>-EOPNOTSUPP</constant></term>
|
||||
|
||||
<listitem>
|
||||
<para>The <parameter>call</parameter> message does not have a cookie.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</refsect1>
|
||||
|
||||
<xi:include href="libsystemd-pkgconfig.xml" />
|
||||
|
||||
<refsect1>
|
||||
<title>Examples</title>
|
||||
|
||||
<example>
|
||||
<title>Make a call to a D-Bus method that takes a single parameter</title>
|
||||
|
||||
<programlisting><xi:include href="print-unit-path.c" parse="text" /></programlisting>
|
||||
<para>This defines a minimally useful program that will open a connection to the bus, create a
|
||||
message object, send it, wait for the reply, and finally extract and print the answer. It does
|
||||
error handling and proper memory management.</para>
|
||||
</example>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>See Also</title>
|
||||
|
||||
<para>
|
||||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_path_encode</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
</refentry>
|
|
@ -0,0 +1,120 @@
|
|||
<?xml version='1.0'?>
|
||||
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
||||
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||||
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
||||
|
||||
<refentry id="sd_bus_message_new_signal"
|
||||
xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
|
||||
<refentryinfo>
|
||||
<title>sd_bus_message_new_signal</title>
|
||||
<productname>systemd</productname>
|
||||
</refentryinfo>
|
||||
|
||||
<refmeta>
|
||||
<refentrytitle>sd_bus_message_new_signal</refentrytitle>
|
||||
<manvolnum>3</manvolnum>
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>sd_bus_message_new_signal</refname>
|
||||
|
||||
<refpurpose>Create a signal message</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<funcsynopsis>
|
||||
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int sd_bus_message_new_signal</funcdef>
|
||||
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
|
||||
<paramdef>sd_bus_message **<parameter>m</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>path</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>interface</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>member</parameter></paramdef>
|
||||
</funcprototype>
|
||||
</funcsynopsis>
|
||||
</refsynopsisdiv>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
|
||||
<para>The <function>sd_bus_message_new_signal()</function> function creates a new bus message
|
||||
object that encapsulates a D-Bus signal, and returns it in the <parameter>m</parameter> output
|
||||
parameter. The signal will be sent to path <parameter>path</parameter>, on the interface
|
||||
<parameter>interface</parameter>, member <parameter>member</parameter>. When this message is
|
||||
sent, no reply is expected. See
|
||||
<citerefentry><refentrytitle>sd_bus_message_new_call</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
||||
for a short description of the meaning of the <parameter>path</parameter>,
|
||||
<parameter>interface</parameter>, and <parameter>member</parameter> parameters.
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Return Value</title>
|
||||
|
||||
<para>This function returns 0 if the message object was successfully created, and a negative
|
||||
errno-style error code otherwise.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1 id='errors'>
|
||||
<title>Errors</title>
|
||||
|
||||
<para>Returned errors may indicate the following problems:</para>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><constant>-EINVAL</constant></term>
|
||||
|
||||
<listitem><para>The output parameter <parameter>m</parameter> is
|
||||
<constant>NULL</constant>.</para>
|
||||
|
||||
<para>The <parameter>path</parameter> parameter is not a valid D-Bus path
|
||||
(<literal>/an/object/path</literal>), the <parameter>interface</parameter> parameter is not
|
||||
a valid D-Bus interface name (<literal>an.interface.name</literal>), or the
|
||||
<parameter>member</parameter> parameter is not a valid D-Bus member
|
||||
(<literal>Name</literal>).</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><constant>-ENOTCONN</constant></term>
|
||||
|
||||
<listitem><para>The bus parameter <parameter>bus</parameter> is <constant>NULL</constant> or
|
||||
the bus is not connected.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><constant>-ENOMEM</constant></term>
|
||||
|
||||
<listitem><para>Memory allocation failed.</para></listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</refsect1>
|
||||
|
||||
<xi:include href="libsystemd-pkgconfig.xml" />
|
||||
|
||||
<refsect1>
|
||||
<title>Examples</title>
|
||||
|
||||
<example>
|
||||
<title>Send a simple signal</title>
|
||||
|
||||
<programlisting><xi:include href="send-unit-files-changed.c" parse="text" /></programlisting>
|
||||
|
||||
<para>This function in systemd sources is used to emit the
|
||||
<literal>UnitFilesChanged</literal> signal when the unit files have been changed.
|
||||
</para>
|
||||
</example>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>See Also</title>
|
||||
|
||||
<para>
|
||||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
</refentry>
|
|
@ -0,0 +1,88 @@
|
|||
<?xml version='1.0'?>
|
||||
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
||||
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||||
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
||||
|
||||
<refentry id="sd_bus_message_rewind"
|
||||
xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
|
||||
<refentryinfo>
|
||||
<title>sd_bus_message_rewind</title>
|
||||
<productname>systemd</productname>
|
||||
</refentryinfo>
|
||||
|
||||
<refmeta>
|
||||
<refentrytitle>sd_bus_message_rewind</refentrytitle>
|
||||
<manvolnum>3</manvolnum>
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>sd_bus_message_rewind</refname>
|
||||
|
||||
<refpurpose>Return to begining of message or current container</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<funcsynopsis>
|
||||
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int <function>sd_bus_message_rewind</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>m</parameter></paramdef>
|
||||
<paramdef>int <parameter>complete</parameter></paramdef>
|
||||
</funcprototype>
|
||||
</funcsynopsis>
|
||||
</refsynopsisdiv>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
|
||||
<para><function>sd_bus_message_rewind()</function> moves the "read pointer" in the message
|
||||
<parameter>m</parameter> to either the begining of the message (if
|
||||
<parameter>complete</parameter> is true) or to the beginning of the currently open container. If
|
||||
no container is open, <parameter>complete</parameter> has no effect.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Return Value</title>
|
||||
|
||||
<para>
|
||||
On success, this function returns 0 or a positive integer. The value is zero if the current
|
||||
container or whole message in case no container is open is empty, and positive otherwise. On
|
||||
failure, it returns a negative errno-style error code.
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
<xi:include href="libsystemd-pkgconfig.xml" />
|
||||
|
||||
<refsect1>
|
||||
<title>Errors</title>
|
||||
|
||||
<para>Returned errors may indicate the following problems:</para>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><constant>-EINVAL</constant></term>
|
||||
|
||||
<listitem><para>The <parameter>m</parameter> parameter is <constant>NULL</constant>.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><constant>-EPERM</constant></term>
|
||||
|
||||
<listitem><para>The message <parameter>m</parameter> has not been sealed.</para></listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>See Also</title>
|
||||
|
||||
<para>
|
||||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_message_read</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
</refentry>
|
|
@ -6,7 +6,6 @@
|
|||
-->
|
||||
|
||||
<refentry id="sd_bus_message_set_destination" xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
|
||||
<refentryinfo>
|
||||
<title>sd_bus_message_set_destination</title>
|
||||
<productname>systemd</productname>
|
||||
|
@ -19,8 +18,14 @@
|
|||
|
||||
<refnamediv>
|
||||
<refname>sd_bus_message_set_destination</refname>
|
||||
<refname>sd_bus_message_get_destination</refname>
|
||||
<refname>sd_bus_message_get_path</refname>
|
||||
<refname>sd_bus_message_get_interface</refname>
|
||||
<refname>sd_bus_message_get_member</refname>
|
||||
<refname>sd_bus_message_set_sender</refname>
|
||||
<refpurpose>Set the destination or sender service name of a bus message</refpurpose>
|
||||
<refname>sd_bus_message_get_sender</refname>
|
||||
|
||||
<refpurpose>Set and query bus message addressing information</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
|
@ -33,31 +38,77 @@
|
|||
<paramdef>const char *<parameter>destination</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>const char* <function>sd_bus_message_get_destination</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>const char* <function>sd_bus_message_get_path</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>const char* <function>sd_bus_message_get_interface</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>const char* <function>sd_bus_message_get_member</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int <function>sd_bus_message_set_sender</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>sender</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>const char* <function>sd_bus_message_get_sender</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
</funcprototype>
|
||||
</funcsynopsis>
|
||||
</refsynopsisdiv>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
|
||||
<para><function>sd_bus_message_set_destination()</function> sets the destination service name for the specified bus
|
||||
message object. The specified name must be a valid unique or well-known service name.</para>
|
||||
<para><function>sd_bus_message_set_destination()</function> sets the destination service name
|
||||
for the specified bus message object. The specified name must be a valid unique or well-known
|
||||
service name.</para>
|
||||
|
||||
<para><function>sd_bus_message_get_destination()</function>,
|
||||
<function>sd_bus_message_get_path()</function>,
|
||||
<function>sd_bus_message_get_interface()</function>, and
|
||||
<function>sd_bus_message_get_member()</function> return the destination, path, interface, and
|
||||
member fields from <parameter>message</parameter> header. The return value will be
|
||||
<constant>NULL</constant> is <parameter>message</parameter> is <constant>NULL</constant> or the
|
||||
message is of a type that doesn't use those fields or the message doesn't have them set. See
|
||||
<citerefentry><refentrytitle>sd_bus_message_new_method_call</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
and
|
||||
<citerefentry><refentrytitle>sd_bus_message_set_destination</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
for more discussion of those values.</para>
|
||||
|
||||
|
||||
<para><function>sd_bus_message_set_sender()</function> sets the sender service name for the specified bus message
|
||||
object. The specified name must be a valid unique or well-known service name. This function is useful only for
|
||||
messages to send on direct connections as for connections to bus brokers the broker will fill in the destination
|
||||
field anyway, and the sender field set by original sender is ignored.</para>
|
||||
|
||||
<para><function>sd_bus_message_get_sender()</function> returns the sender field from
|
||||
<parameter>message</parameter>.</para>
|
||||
|
||||
<para>When a string is returned, it is a pointer to internal storage, and may not be modified or
|
||||
freed. It is only valid as long as the <parameter>message</parameter> remains referenced and
|
||||
this field hasn't been changed by a different call.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Return Value</title>
|
||||
|
||||
<para>On success, these calls return 0 or a positive integer. On failure, these calls return a negative errno-style
|
||||
error code.</para>
|
||||
<para>On success, these calls return 0 or a positive integer. On failure, these calls return a
|
||||
negative errno-style error code.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
|
@ -69,13 +120,16 @@
|
|||
<varlistentry>
|
||||
<term><constant>-EINVAL</constant></term>
|
||||
|
||||
<listitem><para>A specified parameter is invalid.</para></listitem>
|
||||
<listitem><para>The <parameter>message</parameter> parameter or the output parameter are
|
||||
<constant>NULL</constant>.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><constant>-EPERM</constant></term>
|
||||
|
||||
<listitem><para>The message is already sealed.</para></listitem>
|
||||
<listitem><para>For <function>sd_bus_message_set_destination</function> or
|
||||
<function>sd_bus_message_set_sender</function>, the message is already
|
||||
sealed.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
|
|
|
@ -0,0 +1,127 @@
|
|||
<?xml version='1.0'?> <!--*-nxml-*-->
|
||||
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
||||
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||||
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
||||
|
||||
<refentry id="sd_bus_message_set_expect_reply" xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
|
||||
<refentryinfo>
|
||||
<title>sd_bus_message_set_expect_reply</title>
|
||||
<productname>systemd</productname>
|
||||
</refentryinfo>
|
||||
|
||||
<refmeta>
|
||||
<refentrytitle>sd_bus_message_set_expect_reply</refentrytitle>
|
||||
<manvolnum>3</manvolnum>
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>sd_bus_message_set_expect_reply</refname>
|
||||
<refname>sd_bus_message_get_expect_reply</refname>
|
||||
<refname>sd_bus_message_set_auto_start</refname>
|
||||
<refname>sd_bus_message_get_auto_start</refname>
|
||||
|
||||
<refpurpose>Set and query bus message metadata</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<funcsynopsis>
|
||||
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int <function>sd_bus_message_set_expect_reply</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
<paramdef>int <parameter>b</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int <function>sd_bus_message_get_expect_reply</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int <function>sd_bus_message_set_auto_start</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
<paramdef>int <parameter>b</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int <function>sd_bus_message_get_auto_start</function></funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
|
||||
</funcprototype>
|
||||
</funcsynopsis>
|
||||
|
||||
</refsynopsisdiv>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
|
||||
<para><function>sd_bus_message_set_expect_reply()</function> sets or clears the
|
||||
<constant>NO_REPLY_EXPECTED</constant> flag on the message <parameter>m</parameter>. This flag
|
||||
matters only for method call messages and is used to specify that no method return or error
|
||||
reply is expected. It is ignored for other types. Thus, for a method call message, calling
|
||||
<programlisting>sd_bus_message_set_expect_reply(…, 0)</programlisting> sets the flag and
|
||||
suppresses the reply.</para>
|
||||
|
||||
<para><function>sd_bus_message_get_expect_reply()</function> checks if the
|
||||
<constant>NO_REPLY_EXPECTED</constant> flag is set on the message <parameter>m</parameter>. It
|
||||
will return positive if it is not set, and zero if it is.</para>
|
||||
|
||||
<para><function>sd_bus_message_set_auto_start()</function> sets or clears the
|
||||
<constant>NO_AUTO_START</constant> flag on the message <parameter>m</parameter>. When the flag
|
||||
is set the bus must not launch an owner for the destination name in response to this message.
|
||||
Calling
|
||||
<programlisting>sd_bus_message_set_auto_start(…, 0)</programlisting> sets the flag.
|
||||
</para>
|
||||
|
||||
<para><function>sd_bus_message_get_auto_start()</function> checks if the
|
||||
<constant>NO_AUTO_START</constant> flag is set on the message <parameter>m</parameter>. It
|
||||
will return positive if it is not set, and zero if it is.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Return Value</title>
|
||||
|
||||
<para>On success, these functions return 0 or a positive integer. On failure, they return a
|
||||
negative errno-style error code.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Errors</title>
|
||||
|
||||
<para>Returned errors may indicate the following problems:</para>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><constant>-EINVAL</constant></term>
|
||||
|
||||
<listitem><para>The <parameter>message</parameter> parameter is
|
||||
<constant>NULL</constant>.</para></listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><constant>-EPERM</constant></term>
|
||||
|
||||
<listitem><para>The message <parameter>message</parameter> is sealed
|
||||
when trying to set a flag.</para>
|
||||
|
||||
<para>The message <parameter>message</parameter> has wrong
|
||||
type.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</refsect1>
|
||||
|
||||
<xi:include href="libsystemd-pkgconfig.xml" />
|
||||
|
||||
<refsect1>
|
||||
<title>See Also</title>
|
||||
|
||||
<para>
|
||||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_set_description</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
</refentry>
|
|
@ -0,0 +1,99 @@
|
|||
<?xml version='1.0'?>
|
||||
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
||||
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||||
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
||||
|
||||
<refentry id="sd_bus_message_verify_type" xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
<refentryinfo>
|
||||
<title>sd_bus_message_verify_type</title>
|
||||
<productname>systemd</productname>
|
||||
</refentryinfo>
|
||||
|
||||
<refmeta>
|
||||
<refentrytitle>sd_bus_message_verify_type</refentrytitle>
|
||||
<manvolnum>3</manvolnum>
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>sd_bus_message_verify_type</refname>
|
||||
|
||||
<refpurpose>Check if the message has specified type at the current location</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<funcsynopsis>
|
||||
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int sd_bus_message_verify_type</funcdef>
|
||||
<paramdef>sd_bus_message *<parameter>m</parameter></paramdef>
|
||||
<paramdef>char <parameter>type</parameter></paramdef>
|
||||
<paramdef>const char* <parameter>contents</parameter></paramdef>
|
||||
</funcprototype>
|
||||
</funcsynopsis>
|
||||
</refsynopsisdiv>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
|
||||
<para><function>sd_bus_message_verify_type()</function> checks if the complete type at the
|
||||
current location in the message <parameter>m</parameter> matches the specified
|
||||
<parameter>type</parameter> and <parameter>contents</parameter>. If non-zero, parameter
|
||||
<parameter>type</parameter> must be one of the types specified in
|
||||
<citerefentry><refentrytitle>sd_bus_message_append</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
|
||||
If non-null, parameter <parameter>contents</parameter> must be a valid sequence of complete
|
||||
types. If both <parameter>type</parameter> and <parameter>contents</parameter> are specified
|
||||
<parameter>type</parameter> must be a container type.</para>
|
||||
|
||||
<para>If <parameter>type</parameter> is specified, the type in the message must match. If
|
||||
<parameter>contents</parameter> is specified, the type in the message must be a container type
|
||||
with this signature.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Return Value</title>
|
||||
|
||||
<para>On success, this call returns true if the type matches and zero if not (the message
|
||||
<parameter>m</parameter> contains different data or the end of the message has been reached). On
|
||||
failure, it returns a negative errno-style error code.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1 id='errors'>
|
||||
<title>Errors</title>
|
||||
|
||||
<para>Returned errors may indicate the following problems:</para>
|
||||
|
||||
<variablelist>
|
||||
|
||||
<varlistentry>
|
||||
<term><constant>-EINVAL</constant></term>
|
||||
|
||||
<listitem><para><parameter>m</parameter> or both <parameter>type</parameter> and
|
||||
<parameter>contents</parameter> are <constant>NULL</constant>.</para>
|
||||
|
||||
<para>Arguments do not satisfy other contraints listed above.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><constant>-EPERM</constant></term>
|
||||
|
||||
<listitem><para>Message <parameter>m</parameter> is not sealed.
|
||||
</para></listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</refsect1>
|
||||
|
||||
<xi:include href="libsystemd-pkgconfig.xml" />
|
||||
|
||||
<refsect1>
|
||||
<title>See Also</title>
|
||||
|
||||
<para>
|
||||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_message_append</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
</refentry>
|
|
@ -48,7 +48,7 @@
|
|||
|
||||
<funcprototype>
|
||||
<funcdef>void <function>sd_bus_unrefp</function></funcdef>
|
||||
<paramdef>sd_bus **<parameter>bus</parameter></paramdef>
|
||||
<paramdef>sd_bus **<parameter>busp</parameter></paramdef>
|
||||
</funcprototype>
|
||||
</funcsynopsis>
|
||||
</refsynopsisdiv>
|
||||
|
@ -96,19 +96,21 @@
|
|||
block is left:</para>
|
||||
|
||||
<programlisting>{
|
||||
__attribute__((cleanup(sd_bus_unrefp)) sd_bus *bus = NULL;
|
||||
int r;
|
||||
…
|
||||
r = sd_bus_default(&bus);
|
||||
if (r < 0)
|
||||
fprintf(stderr, "Failed to allocate bus: %s\n", strerror(-r));
|
||||
…
|
||||
__attribute__((cleanup(sd_bus_unrefp)) sd_bus *bus = NULL;
|
||||
int r;
|
||||
…
|
||||
r = sd_bus_default(&bus);
|
||||
if (r < 0)
|
||||
fprintf(stderr, "Failed to allocate bus: %s\n", strerror(-r));
|
||||
…
|
||||
}</programlisting>
|
||||
|
||||
<para><function>sd_bus_ref()</function>,
|
||||
<function>sd_bus_unref()</function> and
|
||||
<function>sd_bus_unrefp()</function> execute no operation if the
|
||||
passed in bus object is <constant>NULL</constant>.</para>
|
||||
<para><function>sd_bus_ref()</function> and <function>sd_bus_unref()</function>
|
||||
execute no operation if the passed in bus object address is
|
||||
<constant>NULL</constant>. <function>sd_bus_unrefp()</function> will first
|
||||
dereference its argument, which must not be <constant>NULL</constant>, and will
|
||||
execute no operation if <emphasis>that</emphasis> is <constant>NULL</constant>.
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
|
|
|
@ -80,7 +80,7 @@
|
|||
always be <constant>NUL</constant>-terminated. The returned string
|
||||
will be the concatenation of the bus path prefix plus an escaped
|
||||
version of the external identifier string. This operation may be
|
||||
reversed with <function>sd_bus_decode()</function>. It is
|
||||
reversed with <function>sd_bus_path_decode()</function>. It is
|
||||
recommended to only use external identifiers that generally
|
||||
require little escaping to be turned into valid bus path
|
||||
identifiers (for example, by sticking to a 7-bit ASCII character
|
||||
|
|
|
@ -0,0 +1,107 @@
|
|||
<?xml version='1.0'?>
|
||||
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
||||
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||||
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
||||
|
||||
<refentry id="sd_bus_slot_ref" xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
<refentryinfo>
|
||||
<title>sd_bus_slot_ref</title>
|
||||
<productname>systemd</productname>
|
||||
</refentryinfo>
|
||||
|
||||
<refmeta>
|
||||
<refentrytitle>sd_bus_slot_ref</refentrytitle>
|
||||
<manvolnum>3</manvolnum>
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>sd_bus_slot_ref</refname>
|
||||
<refname>sd_bus_slot_unref</refname>
|
||||
<refname>sd_bus_slot_unrefp</refname>
|
||||
<refname>sd_bus_slot_get_bus</refname>
|
||||
|
||||
<refpurpose>Create and destroy references to a bus slot object</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<funcsynopsis>
|
||||
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>sd_bus_slot *<function>sd_bus_slot_ref</function></funcdef>
|
||||
<paramdef>sd_bus_slot *<parameter>slot</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>sd_bus_slot *<function>sd_bus_slot_unref</function></funcdef>
|
||||
<paramdef>sd_bus_slot *<parameter>slot</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>void <function>sd_bus_slot_unrefp</function></funcdef>
|
||||
<paramdef>sd_bus_slot **<parameter>slotp</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>sd_bus *<function>sd_bus_slot_get_bus</function></funcdef>
|
||||
<paramdef>sd_bus_slot *<parameter>m</parameter></paramdef>
|
||||
</funcprototype>
|
||||
</funcsynopsis>
|
||||
</refsynopsisdiv>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
|
||||
<para><function>sd_bus_slot_ref()</function> increases the reference counter of
|
||||
<parameter>slot</parameter> by one.</para>
|
||||
|
||||
<para><function>sd_bus_slot_unref()</function> decreases the reference counter of
|
||||
<parameter>slot</parameter> by one. Once the reference count has dropped to zero, slot object is
|
||||
destroyed and cannot be used anymore, so further calls to <function>sd_bus_slot_ref()</function>
|
||||
or <function>sd_bus_slot_unref()</function> are illegal.</para>
|
||||
|
||||
<para><function>sd_bus_slot_unrefp()</function> is similar to
|
||||
<function>sd_bus_slot_unref()</function> but takes a pointer to a pointer to an
|
||||
<type>sd_bus_slot</type> object. This call is useful in conjunction with GCC's and LLVM's <ulink
|
||||
url="https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html">Clean-up Variable
|
||||
Attribute</ulink>. See
|
||||
<citerefentry><refentrytitle>sd_bus_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
for an example how to use the cleanup attribute.</para>
|
||||
|
||||
<para><function>sd_bus_slot_ref()</function> and <function>sd_bus_slot_unref()</function>
|
||||
execute no operation if the passed in bus object address is
|
||||
<constant>NULL</constant>. <function>sd_bus_slot_unrefp()</function> will first dereference
|
||||
its argument, which must not be <constant>NULL</constant>, and will execute no operation if
|
||||
<emphasis>that</emphasis> is <constant>NULL</constant>.
|
||||
</para>
|
||||
|
||||
<para><function>sd_bus_slot_get_bus()</function> returns the bus object that message
|
||||
<parameter>slot</parameter> is attached to.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Return Value</title>
|
||||
|
||||
<para><function>sd_bus_slot_ref()</function> always returns the argument.</para>
|
||||
|
||||
<para><function>sd_bus_slot_unref()</function> always returns <constant>NULL</constant>.</para>
|
||||
|
||||
<para><function>sd_bus_slot_get_bus()</function> always returns the bus object.</para>
|
||||
</refsect1>
|
||||
|
||||
<xi:include href="libsystemd-pkgconfig.xml" />
|
||||
|
||||
<refsect1>
|
||||
<title>See Also</title>
|
||||
|
||||
<para>
|
||||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_message_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_slot_new_signal</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_call_method_async</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
</refentry>
|
|
@ -0,0 +1,109 @@
|
|||
<?xml version='1.0'?>
|
||||
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
||||
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||||
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
||||
|
||||
<refentry id="sd_bus_slot_set_description" xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
<refentryinfo>
|
||||
<title>sd_bus_slot_set_description</title>
|
||||
<productname>systemd</productname>
|
||||
</refentryinfo>
|
||||
|
||||
<refmeta>
|
||||
<refentrytitle>sd_bus_slot_set_description</refentrytitle>
|
||||
<manvolnum>3</manvolnum>
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>sd_bus_slot_set_description</refname>
|
||||
<refname>sd_bus_slot_get_description</refname>
|
||||
|
||||
<refpurpose>Set or query the description of bus slot objects</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<funcsynopsis>
|
||||
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int <function>sd_bus_slot_set_description</function></funcdef>
|
||||
<paramdef>sd_bus_slot* <parameter>slot</parameter></paramdef>
|
||||
<paramdef>const char *<parameter>description</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>int <function>sd_bus_slot_get_description</function></funcdef>
|
||||
<paramdef>sd_bus_slot* <parameter>bus</parameter></paramdef>
|
||||
<paramdef>const char **<parameter>description</parameter></paramdef>
|
||||
</funcprototype>
|
||||
</funcsynopsis>
|
||||
</refsynopsisdiv>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
|
||||
<para><function>sd_bus_slot_set_description()</function> sets the description string
|
||||
that is used in logging to the specified string. The string is copied internally
|
||||
and freed when the bus slot object is deallocated. The
|
||||
<parameter>description</parameter> argument may be <constant>NULL</constant>, in
|
||||
which case the description is unset.</para>
|
||||
|
||||
<para><function>sd_bus_slot_get_description()</function> returns a description string in
|
||||
<parameter>description</parameter>. If the string is not set, e.g. with
|
||||
<function>sd_bus_slot_set_description()</function>, and the slot is a bus match callback slot,
|
||||
the match string will be returned. Otherwise, <constant>-ENXIO</constant> is returned.
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Return Value</title>
|
||||
|
||||
<para>On success, these functions return 0 or a positive integer. On failure,
|
||||
they return a negative errno-style error code.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Errors</title>
|
||||
|
||||
<para>Returned errors may indicate the following problems:</para>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><constant>-EINVAL</constant></term>
|
||||
|
||||
<listitem><para>An required argument is <constant>NULL</constant>.</para></listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><constant>-ENXIO</constant></term>
|
||||
|
||||
<listitem><para>The bus slot object has no description.</para></listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><constant>-ENOMEM</constant></term>
|
||||
|
||||
<listitem><para>Memory allocation failed.</para></listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
|
||||
</refsect1>
|
||||
|
||||
<xi:include href="libsystemd-pkgconfig.xml" />
|
||||
|
||||
<refsect1>
|
||||
<title>See Also</title>
|
||||
|
||||
<para>
|
||||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
<citerefentry><refentrytitle>sd_bus_slot_ref</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_slot_set_userdata</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
</refentry>
|
|
@ -0,0 +1,88 @@
|
|||
<?xml version='1.0'?>
|
||||
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
||||
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||||
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
||||
|
||||
<refentry id="sd_bus_slot_set_userdata" xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||
|
||||
<refentryinfo>
|
||||
<title>sd_bus_slot_set_userdata</title>
|
||||
<productname>systemd</productname>
|
||||
</refentryinfo>
|
||||
|
||||
<refmeta>
|
||||
<refentrytitle>sd_bus_slot_set_userdata</refentrytitle>
|
||||
<manvolnum>3</manvolnum>
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>sd_bus_slot_set_userdata</refname>
|
||||
<refname>sd_bus_slot_get_userdata</refname>
|
||||
|
||||
<refpurpose>Set and query the value in the "userdata" field</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<funcsynopsis>
|
||||
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>void* <function>sd_bus_slot_set_userdata</function></funcdef>
|
||||
<paramdef>sd_bus_slot* <parameter>slot</parameter></paramdef>
|
||||
<paramdef>void* <parameter>userdata</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
<funcprototype>
|
||||
<funcdef>void* <function>sd_bus_slot_get_userdata</function></funcdef>
|
||||
<paramdef>sd_bus_slot* <parameter>slot</parameter></paramdef>
|
||||
</funcprototype>
|
||||
|
||||
</funcsynopsis>
|
||||
</refsynopsisdiv>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
|
||||
<para>The userdata pointer allows data to be passed between the point where a callback is
|
||||
registered, for example when a filter is added using
|
||||
<citerefentry><refentrytitle>sd_bus_add_filter</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
or an asynchronous function call is made using
|
||||
<citerefentry><refentrytitle>sd_bus_call_async</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
and the point where the callback is called, without having any global state. The pointer has
|
||||
type <type>void*</type> and is not used by the sd-bus functions in any way, except to pass to
|
||||
the callback function.</para>
|
||||
|
||||
<para>Usually, the userdata field is set when the slot object is initially
|
||||
registered. <function>sd_bus_slot_set_userdata()</function> may be used to change it later for
|
||||
the bus slot object <parameter>slot</parameter>. Previous value of the field is returned. The
|
||||
argument and returned value may be <constant>NULL</constant>. It will be passed as the
|
||||
<parameter>userdata</parameter> argument to the callback function attached to the slot.</para>
|
||||
|
||||
<para><function>sd_bus_slot_set_userdata()</function> gets the value of the userdata field in
|
||||
the bus slot object <parameter>slot</parameter>.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Return Value</title>
|
||||
|
||||
<para>On success, these functions return the value of the userdata field before the function
|
||||
call. If the <parameter>slot</parameter> object is <constant>NULL</constant>,
|
||||
<constant>NULL</constant> will be returned to signify an error, but this is not distinguishable
|
||||
from the userdata field value being <constant>NULL</constant>.</para>
|
||||
</refsect1>
|
||||
|
||||
<xi:include href="libsystemd-pkgconfig.xml" />
|
||||
|
||||
<refsect1>
|
||||
<title>See Also</title>
|
||||
|
||||
<para>
|
||||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_slot_set_destroy_callback</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_add_match</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||
<citerefentry><refentrytitle>sd_bus_slot_get_current_userdata</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||
</para>
|
||||
</refsect1>
|
||||
|
||||
</refentry>
|
|
@ -120,17 +120,7 @@
|
|||
|
||||
<para>Here's a simple example for an application specific machine ID:</para>
|
||||
|
||||
<programlisting>#include <systemd/sd-id128.h>
|
||||
#include <stdio.h>
|
||||
|
||||
#define OUR_APPLICATION_ID SD_ID128_MAKE(c2,73,27,73,23,db,45,4e,a6,3b,b9,6e,79,b5,3e,97)
|
||||
|
||||
int main(int argc, char *argv[]) {
|
||||
sd_id128_t id;
|
||||
sd_id128_get_machine_app_specific(OUR_APPLICATION_ID, &id);
|
||||
printf("Our application ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(id));
|
||||
return 0;
|
||||
}</programlisting>
|
||||
<programlisting><xi:include href="id128-app-specific.c" parse="text" /></programlisting>
|
||||
</example>
|
||||
</refsect1>
|
||||
|
||||
|
|
|
@ -140,32 +140,7 @@
|
|||
following example lists all unit names referenced in the
|
||||
journal:</para>
|
||||
|
||||
<programlisting>#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <systemd/sd-journal.h>
|
||||
|
||||
int main(int argc, char *argv[]) {
|
||||
sd_journal *j;
|
||||
const void *d;
|
||||
size_t l;
|
||||
int r;
|
||||
|
||||
r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY);
|
||||
if (r < 0) {
|
||||
fprintf(stderr, "Failed to open journal: %s\n", strerror(-r));
|
||||
return 1;
|
||||
}
|
||||
r = sd_journal_query_unique(j, "_SYSTEMD_UNIT");
|
||||
if (r < 0) {
|
||||
fprintf(stderr, "Failed to query journal: %s\n", strerror(-r));
|
||||
return 1;
|
||||
}
|
||||
SD_JOURNAL_FOREACH_UNIQUE(j, d, l)
|
||||
printf("%.*s\n", (int) l, (const char*) d);
|
||||
sd_journal_close(j);
|
||||
return 0;
|
||||
}</programlisting>
|
||||
|
||||
<programlisting><xi:include href="journal-iterate-unique.c" parse="text" /></programlisting>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
|
|
|
@ -115,13 +115,13 @@
|
|||
code block is left:</para>
|
||||
|
||||
<programlisting>{
|
||||
__attribute__((cleanup(sd_login_monitor_unrefp)) sd_login_monitor *m = NULL;
|
||||
int r;
|
||||
…
|
||||
r = sd_login_monitor_default(&m);
|
||||
if (r < 0)
|
||||
fprintf(stderr, "Failed to allocate login monitor object: %s\n", strerror(-r));
|
||||
…
|
||||
__attribute__((cleanup(sd_login_monitor_unrefp)) sd_login_monitor *m = NULL;
|
||||
int r;
|
||||
…
|
||||
r = sd_login_monitor_default(&m);
|
||||
if (r < 0)
|
||||
fprintf(stderr, "Failed to allocate login monitor object: %s\n", strerror(-r));
|
||||
…
|
||||
}</programlisting>
|
||||
|
||||
<para><function>sd_login_monitor_flush()</function> may be used to
|
||||
|
@ -176,13 +176,13 @@
|
|||
int msec;
|
||||
sd_login_monitor_get_timeout(m, &t);
|
||||
if (t == (uint64_t) -1)
|
||||
msec = -1;
|
||||
msec = -1;
|
||||
else {
|
||||
struct timespec ts;
|
||||
uint64_t n;
|
||||
clock_gettime(CLOCK_MONOTONIC, &ts);
|
||||
n = (uint64_t) ts.tv_sec * 1000000 + ts.tv_nsec / 1000;
|
||||
msec = t > n ? (int) ((t - n + 999) / 1000) : 0;
|
||||
struct timespec ts;
|
||||
uint64_t n;
|
||||
clock_gettime(CLOCK_MONOTONIC, &ts);
|
||||
n = (uint64_t) ts.tv_sec * 1000000 + ts.tv_nsec / 1000;
|
||||
msec = t > n ? (int) ((t - n + 999) / 1000) : 0;
|
||||
}</programlisting>
|
||||
|
||||
<para>The code above does not do any error checking for brevity's
|
||||
|
|
|
@ -0,0 +1,16 @@
|
|||
#include <systemd/sd-bus.h>
|
||||
#define _cleanup_(f) __attribute__((cleanup(f)))
|
||||
|
||||
int send_unit_files_changed(sd_bus *bus) {
|
||||
_cleanup_(sd_bus_message_unrefp) sd_bus_message *message = NULL;
|
||||
int r;
|
||||
|
||||
r = sd_bus_message_new_signal(bus, &message,
|
||||
"/org/freedesktop/systemd1",
|
||||
"org.freedesktop.systemd1.Manager",
|
||||
"UnitFilesChanged");
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
return sd_bus_send(bus, message, NULL);
|
||||
}
|
|
@ -5433,6 +5433,7 @@ int bus_message_parse_fields(sd_bus_message *m) {
|
|||
_public_ int sd_bus_message_set_destination(sd_bus_message *m, const char *destination) {
|
||||
assert_return(m, -EINVAL);
|
||||
assert_return(destination, -EINVAL);
|
||||
assert_return(service_name_is_valid(destination), -EINVAL);
|
||||
assert_return(!m->sealed, -EPERM);
|
||||
assert_return(!m->destination, -EEXIST);
|
||||
|
||||
|
@ -5442,6 +5443,7 @@ _public_ int sd_bus_message_set_destination(sd_bus_message *m, const char *desti
|
|||
_public_ int sd_bus_message_set_sender(sd_bus_message *m, const char *sender) {
|
||||
assert_return(m, -EINVAL);
|
||||
assert_return(sender, -EINVAL);
|
||||
assert_return(service_name_is_valid(sender), -EINVAL);
|
||||
assert_return(!m->sealed, -EPERM);
|
||||
assert_return(!m->sender, -EEXIST);
|
||||
|
||||
|
|
|
@ -2,10 +2,33 @@
|
|||
|
||||
set -eu
|
||||
|
||||
sd_good=0
|
||||
sd_total=0
|
||||
udev_good=0
|
||||
udev_total=0
|
||||
|
||||
for symbol in `nm -g --defined-only "$@" | grep " T " | cut -d" " -f3 | sort -u` ; do
|
||||
if test -f ${MESON_BUILD_ROOT}/man/$symbol.3 ; then
|
||||
echo "✓ Symbol $symbol() is documented."
|
||||
good=1
|
||||
else
|
||||
printf " \x1b[1;31mSymbol $symbol() lacks documentation.\x1b[0m\n"
|
||||
good=0
|
||||
fi
|
||||
|
||||
case $symbol in
|
||||
sd_*)
|
||||
((sd_good+=good))
|
||||
((sd_total+=1))
|
||||
;;
|
||||
udev_*)
|
||||
((udev_good+=good))
|
||||
((udev_total+=1))
|
||||
;;
|
||||
*)
|
||||
echo 'unknown symbol prefix'
|
||||
exit 1
|
||||
esac
|
||||
done
|
||||
|
||||
echo "libsystemd: $sd_good/$sd_total libudev: $udev_good/$udev_total"
|
||||
|
|
Loading…
Reference in New Issue