515 lines
17 KiB
C
515 lines
17 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <getopt.h>
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#include "strv.h"
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#include "util.h"
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#include "log.h"
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#include "build.h"
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#include "pager.h"
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#include "sd-bus.h"
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#include "bus-message.h"
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#include "bus-internal.h"
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#include "bus-util.h"
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#include "bus-dump.h"
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static bool arg_no_pager = false;
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static char *arg_address = NULL;
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static bool arg_unique = false;
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static bool arg_acquired = false;
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static bool arg_activatable = false;
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static bool arg_show_machine = false;
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static char **arg_matches = NULL;
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static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
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static char *arg_host = NULL;
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static bool arg_user = false;
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static void pager_open_if_enabled(void) {
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/* Cache result before we open the pager */
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if (arg_no_pager)
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return;
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pager_open(false);
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}
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static int list_bus_names(sd_bus *bus, char **argv) {
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_cleanup_strv_free_ char **acquired = NULL, **activatable = NULL;
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_cleanup_free_ char **merged = NULL;
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_cleanup_hashmap_free_ Hashmap *names = NULL;
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char **i;
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int r;
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size_t max_i = 0;
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unsigned n = 0;
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void *v;
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char *k;
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Iterator iterator;
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assert(bus);
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r = sd_bus_list_names(bus, (arg_acquired || arg_unique) ? &acquired : NULL, arg_activatable ? &activatable : NULL);
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if (r < 0) {
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log_error("Failed to list names: %s", strerror(-r));
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return r;
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}
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pager_open_if_enabled();
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names = hashmap_new(string_hash_func, string_compare_func);
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if (!names)
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return log_oom();
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STRV_FOREACH(i, acquired) {
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max_i = MAX(max_i, strlen(*i));
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r = hashmap_put(names, *i, INT_TO_PTR(1));
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if (r < 0) {
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log_error("Failed to add to hashmap: %s", strerror(-r));
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return r;
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}
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}
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STRV_FOREACH(i, activatable) {
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max_i = MAX(max_i, strlen(*i));
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r = hashmap_put(names, *i, INT_TO_PTR(2));
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if (r < 0 && r != -EEXIST) {
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log_error("Failed to add to hashmap: %s", strerror(-r));
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return r;
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}
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}
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merged = new(char*, hashmap_size(names) + 1);
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HASHMAP_FOREACH_KEY(v, k, names, iterator)
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merged[n++] = k;
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merged[n] = NULL;
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strv_sort(merged);
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printf("%-*s %*s %-*s %-*s %-*s %-*s %-*s",
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(int) max_i, "NAME", 10, "PID", 15, "PROCESS", 16, "USER", 13, "CONNECTION", 25, "UNIT", 10, "SESSION");
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if (arg_show_machine)
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puts(" MACHINE");
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else
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putchar('\n');
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STRV_FOREACH(i, merged) {
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_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
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sd_id128_t mid;
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if (hashmap_get(names, *i) == INT_TO_PTR(2)) {
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/* Activatable */
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printf("%-*s", (int) max_i, *i);
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printf(" - - - (activatable) - - ");
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if (arg_show_machine)
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puts(" -");
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else
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putchar('\n');
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continue;
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}
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if (!arg_unique && (*i)[0] == ':')
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continue;
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if (!arg_acquired && (*i)[0] != ':')
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continue;
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printf("%-*s", (int) max_i, *i);
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r = sd_bus_get_owner(bus, *i, SD_BUS_CREDS_UID|SD_BUS_CREDS_PID|SD_BUS_CREDS_COMM|SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_SESSION, &creds);
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if (r >= 0) {
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const char *unique, *session, *unit;
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pid_t pid;
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uid_t uid;
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r = sd_bus_creds_get_pid(creds, &pid);
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if (r >= 0) {
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const char *comm = NULL;
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sd_bus_creds_get_comm(creds, &comm);
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printf(" %10lu %-15s", (unsigned long) pid, strna(comm));
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} else
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fputs(" - - ", stdout);
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r = sd_bus_creds_get_uid(creds, &uid);
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if (r >= 0) {
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_cleanup_free_ char *u = NULL;
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u = uid_to_name(uid);
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if (!u)
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return log_oom();
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if (strlen(u) > 16)
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u[16] = 0;
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printf(" %-16s", u);
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} else
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fputs(" - ", stdout);
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r = sd_bus_creds_get_unique_name(creds, &unique);
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if (r >= 0)
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printf(" %-13s", unique);
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else
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fputs(" - ", stdout);
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r = sd_bus_creds_get_unit(creds, &unit);
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if (r >= 0) {
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_cleanup_free_ char *e;
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e = ellipsize(unit, 25, 100);
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if (!e)
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return log_oom();
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printf(" %-25s", e);
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} else
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fputs(" - ", stdout);
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r = sd_bus_creds_get_session(creds, &session);
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if (r >= 0)
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printf(" %-10s", session);
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else
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fputs(" - ", stdout);
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} else
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printf(" - - - - - - ");
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if (arg_show_machine) {
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r = sd_bus_get_owner_machine_id(bus, *i, &mid);
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if (r >= 0) {
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char m[SD_ID128_STRING_MAX];
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printf(" %s\n", sd_id128_to_string(mid, m));
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} else
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puts(" -");
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} else
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putchar('\n');
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}
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return 0;
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}
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static int monitor(sd_bus *bus, char *argv[]) {
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bool added_something = false;
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char **i;
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int r;
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STRV_FOREACH(i, argv+1) {
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_cleanup_free_ char *m = NULL;
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if (!service_name_is_valid(*i)) {
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log_error("Invalid service name '%s'", *i);
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return -EINVAL;
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}
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m = strjoin("sender='", *i, "'", NULL);
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if (!m)
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return log_oom();
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r = sd_bus_add_match(bus, m, NULL, NULL);
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if (r < 0) {
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log_error("Failed to add match: %s", strerror(-r));
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return r;
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}
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added_something = true;
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}
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STRV_FOREACH(i, arg_matches) {
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r = sd_bus_add_match(bus, *i, NULL, NULL);
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if (r < 0) {
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log_error("Failed to add match: %s", strerror(-r));
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return r;
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}
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added_something = true;
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}
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if (!added_something) {
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r = sd_bus_add_match(bus, "", NULL, NULL);
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if (r < 0) {
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log_error("Failed to add match: %s", strerror(-r));
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return r;
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}
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}
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for (;;) {
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_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
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r = sd_bus_process(bus, &m);
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if (r < 0) {
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log_error("Failed to process bus: %s", strerror(-r));
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return r;
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}
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if (m) {
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bus_message_dump(m, stdout, true);
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continue;
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}
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if (r > 0)
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continue;
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r = sd_bus_wait(bus, (uint64_t) -1);
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if (r < 0) {
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log_error("Failed to wait for bus: %s", strerror(-r));
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return r;
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}
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}
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}
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static int status(sd_bus *bus, char *argv[]) {
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_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
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pid_t pid;
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int r;
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assert(bus);
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if (strv_length(argv) != 2) {
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log_error("Expects one argument.");
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return -EINVAL;
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}
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r = parse_pid(argv[1], &pid);
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if (r < 0)
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r = sd_bus_get_owner(bus, argv[1], _SD_BUS_CREDS_ALL, &creds);
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else
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r = sd_bus_creds_new_from_pid(pid, _SD_BUS_CREDS_ALL, &creds);
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if (r < 0) {
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log_error("Failed to get credentials: %s", strerror(-r));
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return r;
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}
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bus_creds_dump(creds, NULL);
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return 0;
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}
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static int help(void) {
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printf("%s [OPTIONS...] {COMMAND} ...\n\n"
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"Introspect the bus.\n\n"
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" -h --help Show this help\n"
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" --version Show package version\n"
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" --no-pager Do not pipe output into a pager\n"
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" --system Connect to system bus\n"
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" --user Connect to user bus\n"
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" -H --host=[USER@]HOST Operate on remote host\n"
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" -M --machine=CONTAINER Operate on local container\n"
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" --address=ADDRESS Connect to bus specified by address\n"
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" --show-machine Show machine ID column in list\n"
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" --unique Only show unique names\n"
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" --acquired Only show acquired names\n"
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" --activatable Only show activatable names\n"
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" --match=MATCH Only show matching messages\n\n"
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"Commands:\n"
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" list List bus names\n"
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" monitor [SERVICE...] Show bus traffic\n"
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" status NAME Show name status\n"
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" help Show this help\n",
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program_invocation_short_name);
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return 0;
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_VERSION = 0x100,
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ARG_NO_PAGER,
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ARG_SYSTEM,
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ARG_USER,
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ARG_ADDRESS,
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ARG_MATCH,
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ARG_SHOW_MACHINE,
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ARG_UNIQUE,
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ARG_ACQUIRED,
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ARG_ACTIVATABLE
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
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{ "system", no_argument, NULL, ARG_SYSTEM },
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{ "user", no_argument, NULL, ARG_USER },
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{ "address", required_argument, NULL, ARG_ADDRESS },
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{ "show-machine", no_argument, NULL, ARG_SHOW_MACHINE },
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{ "unique", no_argument, NULL, ARG_UNIQUE },
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{ "acquired", no_argument, NULL, ARG_ACQUIRED },
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{ "activatable", no_argument, NULL, ARG_ACTIVATABLE },
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{ "match", required_argument, NULL, ARG_MATCH },
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{ "host", required_argument, NULL, 'H' },
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{ "machine", required_argument, NULL, 'M' },
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{},
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};
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int c;
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0) {
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switch (c) {
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case 'h':
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return help();
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case ARG_VERSION:
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puts(PACKAGE_STRING);
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puts(SYSTEMD_FEATURES);
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return 0;
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case ARG_NO_PAGER:
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arg_no_pager = true;
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break;
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case ARG_USER:
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arg_user = true;
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break;
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case ARG_SYSTEM:
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arg_user = false;
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break;
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case ARG_ADDRESS:
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arg_address = optarg;
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break;
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case ARG_SHOW_MACHINE:
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arg_show_machine = true;
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break;
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case ARG_UNIQUE:
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arg_unique = true;
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break;
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case ARG_ACQUIRED:
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arg_acquired = true;
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break;
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case ARG_ACTIVATABLE:
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arg_activatable = true;
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break;
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case ARG_MATCH:
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if (strv_extend(&arg_matches, optarg) < 0)
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return log_oom();
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break;
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case 'H':
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arg_transport = BUS_TRANSPORT_REMOTE;
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arg_host = optarg;
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break;
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case 'M':
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arg_transport = BUS_TRANSPORT_CONTAINER;
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arg_host = optarg;
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break;
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unhandled option");
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}
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}
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if (!arg_unique && !arg_acquired && !arg_activatable)
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arg_unique = arg_acquired = arg_activatable = true;
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return 1;
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}
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static int busctl_main(sd_bus *bus, int argc, char *argv[]) {
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assert(bus);
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if (optind >= argc ||
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streq(argv[optind], "list"))
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return list_bus_names(bus, argv + optind);
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if (streq(argv[optind], "monitor"))
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return monitor(bus, argv + optind);
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if (streq(argv[optind], "status"))
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return status(bus, argv + optind);
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if (streq(argv[optind], "help"))
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return help();
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log_error("Unknown command '%s'", argv[optind]);
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return -EINVAL;
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}
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int main(int argc, char *argv[]) {
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_cleanup_bus_unref_ sd_bus *bus = NULL;
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int r;
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log_parse_environment();
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log_open();
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r = parse_argv(argc, argv);
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if (r <= 0)
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goto finish;
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if (arg_address) {
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r = sd_bus_new(&bus);
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if (r < 0) {
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log_error("Failed to allocate bus: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_set_address(bus, arg_address);
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if (r < 0) {
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log_error("Failed to set address: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_set_bus_client(bus, true);
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if (r < 0) {
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log_error("Failed to set bus client: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_start(bus);
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} else
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r = bus_open_transport(arg_transport, arg_host, arg_user, &bus);
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if (r < 0) {
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log_error("Failed to connect to bus: %s", strerror(-r));
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goto finish;
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}
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r = busctl_main(bus, argc, argv);
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finish:
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pager_close();
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strv_free(arg_matches);
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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