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path: root/src/libsystemd/sd-bus/busctl.c
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Diffstat (limited to 'src/libsystemd/sd-bus/busctl.c')
-rw-r--r--src/libsystemd/sd-bus/busctl.c514
1 files changed, 514 insertions, 0 deletions
diff --git a/src/libsystemd/sd-bus/busctl.c b/src/libsystemd/sd-bus/busctl.c
new file mode 100644
index 0000000000..e962ba3f63
--- /dev/null
+++ b/src/libsystemd/sd-bus/busctl.c
@@ -0,0 +1,514 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <getopt.h>
+
+#include "strv.h"
+#include "util.h"
+#include "log.h"
+#include "build.h"
+#include "pager.h"
+
+#include "sd-bus.h"
+#include "bus-message.h"
+#include "bus-internal.h"
+#include "bus-util.h"
+#include "bus-dump.h"
+
+static bool arg_no_pager = false;
+static char *arg_address = NULL;
+static bool arg_unique = false;
+static bool arg_acquired = false;
+static bool arg_activatable = false;
+static bool arg_show_machine = false;
+static char **arg_matches = NULL;
+static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
+static char *arg_host = NULL;
+static bool arg_user = false;
+
+static void pager_open_if_enabled(void) {
+
+ /* Cache result before we open the pager */
+ if (arg_no_pager)
+ return;
+
+ pager_open(false);
+}
+
+static int list_bus_names(sd_bus *bus, char **argv) {
+ _cleanup_strv_free_ char **acquired = NULL, **activatable = NULL;
+ _cleanup_free_ char **merged = NULL;
+ _cleanup_hashmap_free_ Hashmap *names = NULL;
+ char **i;
+ int r;
+ size_t max_i = 0;
+ unsigned n = 0;
+ void *v;
+ char *k;
+ Iterator iterator;
+
+ assert(bus);
+
+ r = sd_bus_list_names(bus, (arg_acquired || arg_unique) ? &acquired : NULL, arg_activatable ? &activatable : NULL);
+ if (r < 0) {
+ log_error("Failed to list names: %s", strerror(-r));
+ return r;
+ }
+
+ pager_open_if_enabled();
+
+ names = hashmap_new(string_hash_func, string_compare_func);
+ if (!names)
+ return log_oom();
+
+ STRV_FOREACH(i, acquired) {
+ max_i = MAX(max_i, strlen(*i));
+
+ r = hashmap_put(names, *i, INT_TO_PTR(1));
+ if (r < 0) {
+ log_error("Failed to add to hashmap: %s", strerror(-r));
+ return r;
+ }
+ }
+
+ STRV_FOREACH(i, activatable) {
+ max_i = MAX(max_i, strlen(*i));
+
+ r = hashmap_put(names, *i, INT_TO_PTR(2));
+ if (r < 0 && r != -EEXIST) {
+ log_error("Failed to add to hashmap: %s", strerror(-r));
+ return r;
+ }
+ }
+
+ merged = new(char*, hashmap_size(names) + 1);
+ HASHMAP_FOREACH_KEY(v, k, names, iterator)
+ merged[n++] = k;
+
+ merged[n] = NULL;
+ strv_sort(merged);
+
+ printf("%-*s %*s %-*s %-*s %-*s %-*s %-*s",
+ (int) max_i, "NAME", 10, "PID", 15, "PROCESS", 16, "USER", 13, "CONNECTION", 25, "UNIT", 10, "SESSION");
+
+ if (arg_show_machine)
+ puts(" MACHINE");
+ else
+ putchar('\n');
+
+ STRV_FOREACH(i, merged) {
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
+ sd_id128_t mid;
+
+ if (hashmap_get(names, *i) == INT_TO_PTR(2)) {
+ /* Activatable */
+
+ printf("%-*s", (int) max_i, *i);
+ printf(" - - - (activatable) - - ");
+ if (arg_show_machine)
+ puts(" -");
+ else
+ putchar('\n');
+ continue;
+
+ }
+
+ if (!arg_unique && (*i)[0] == ':')
+ continue;
+
+ if (!arg_acquired && (*i)[0] != ':')
+ continue;
+
+ printf("%-*s", (int) max_i, *i);
+
+ 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);
+ if (r >= 0) {
+ const char *unique, *session, *unit;
+ pid_t pid;
+ uid_t uid;
+
+ r = sd_bus_creds_get_pid(creds, &pid);
+ if (r >= 0) {
+ const char *comm = NULL;
+
+ sd_bus_creds_get_comm(creds, &comm);
+
+ printf(" %10lu %-15s", (unsigned long) pid, strna(comm));
+ } else
+ fputs(" - - ", stdout);
+
+ r = sd_bus_creds_get_uid(creds, &uid);
+ if (r >= 0) {
+ _cleanup_free_ char *u = NULL;
+
+ u = uid_to_name(uid);
+ if (!u)
+ return log_oom();
+
+ if (strlen(u) > 16)
+ u[16] = 0;
+
+ printf(" %-16s", u);
+ } else
+ fputs(" - ", stdout);
+
+ r = sd_bus_creds_get_unique_name(creds, &unique);
+ if (r >= 0)
+ printf(" %-13s", unique);
+ else
+ fputs(" - ", stdout);
+
+ r = sd_bus_creds_get_unit(creds, &unit);
+ if (r >= 0) {
+ _cleanup_free_ char *e;
+
+ e = ellipsize(unit, 25, 100);
+ if (!e)
+ return log_oom();
+
+ printf(" %-25s", e);
+ } else
+ fputs(" - ", stdout);
+
+ r = sd_bus_creds_get_session(creds, &session);
+ if (r >= 0)
+ printf(" %-10s", session);
+ else
+ fputs(" - ", stdout);
+
+ } else
+ printf(" - - - - - - ");
+
+ if (arg_show_machine) {
+ r = sd_bus_get_owner_machine_id(bus, *i, &mid);
+ if (r >= 0) {
+ char m[SD_ID128_STRING_MAX];
+ printf(" %s\n", sd_id128_to_string(mid, m));
+ } else
+ puts(" -");
+ } else
+ putchar('\n');
+ }
+
+ return 0;
+}
+
+static int monitor(sd_bus *bus, char *argv[]) {
+ bool added_something = false;
+ char **i;
+ int r;
+
+ STRV_FOREACH(i, argv+1) {
+ _cleanup_free_ char *m = NULL;
+
+ if (!service_name_is_valid(*i)) {
+ log_error("Invalid service name '%s'", *i);
+ return -EINVAL;
+ }
+
+ m = strjoin("sender='", *i, "'", NULL);
+ if (!m)
+ return log_oom();
+
+ r = sd_bus_add_match(bus, m, NULL, NULL);
+ if (r < 0) {
+ log_error("Failed to add match: %s", strerror(-r));
+ return r;
+ }
+
+ added_something = true;
+ }
+
+ STRV_FOREACH(i, arg_matches) {
+ r = sd_bus_add_match(bus, *i, NULL, NULL);
+ if (r < 0) {
+ log_error("Failed to add match: %s", strerror(-r));
+ return r;
+ }
+
+ added_something = true;
+ }
+
+ if (!added_something) {
+ r = sd_bus_add_match(bus, "", NULL, NULL);
+ if (r < 0) {
+ log_error("Failed to add match: %s", strerror(-r));
+ return r;
+ }
+ }
+
+ for (;;) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+
+ r = sd_bus_process(bus, &m);
+ if (r < 0) {
+ log_error("Failed to process bus: %s", strerror(-r));
+ return r;
+ }
+
+ if (m) {
+ bus_message_dump(m, stdout, true);
+ continue;
+ }
+
+ if (r > 0)
+ continue;
+
+ r = sd_bus_wait(bus, (uint64_t) -1);
+ if (r < 0) {
+ log_error("Failed to wait for bus: %s", strerror(-r));
+ return r;
+ }
+ }
+}
+
+static int status(sd_bus *bus, char *argv[]) {
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
+ pid_t pid;
+ int r;
+
+ assert(bus);
+
+ if (strv_length(argv) != 2) {
+ log_error("Expects one argument.");
+ return -EINVAL;
+ }
+
+ r = parse_pid(argv[1], &pid);
+ if (r < 0)
+ r = sd_bus_get_owner(bus, argv[1], _SD_BUS_CREDS_ALL, &creds);
+ else
+ r = sd_bus_creds_new_from_pid(pid, _SD_BUS_CREDS_ALL, &creds);
+
+ if (r < 0) {
+ log_error("Failed to get credentials: %s", strerror(-r));
+ return r;
+ }
+
+ bus_creds_dump(creds, NULL);
+ return 0;
+}
+
+static int help(void) {
+
+ printf("%s [OPTIONS...] {COMMAND} ...\n\n"
+ "Introspect the bus.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " --no-pager Do not pipe output into a pager\n"
+ " --system Connect to system bus\n"
+ " --user Connect to user bus\n"
+ " -H --host=[USER@]HOST Operate on remote host\n"
+ " -M --machine=CONTAINER Operate on local container\n"
+ " --address=ADDRESS Connect to bus specified by address\n"
+ " --show-machine Show machine ID column in list\n"
+ " --unique Only show unique names\n"
+ " --acquired Only show acquired names\n"
+ " --activatable Only show activatable names\n"
+ " --match=MATCH Only show matching messages\n\n"
+ "Commands:\n"
+ " list List bus names\n"
+ " monitor [SERVICE...] Show bus traffic\n"
+ " status NAME Show name status\n"
+ " help Show this help\n",
+ program_invocation_short_name);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_NO_PAGER,
+ ARG_SYSTEM,
+ ARG_USER,
+ ARG_ADDRESS,
+ ARG_MATCH,
+ ARG_SHOW_MACHINE,
+ ARG_UNIQUE,
+ ARG_ACQUIRED,
+ ARG_ACTIVATABLE
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ { "system", no_argument, NULL, ARG_SYSTEM },
+ { "user", no_argument, NULL, ARG_USER },
+ { "address", required_argument, NULL, ARG_ADDRESS },
+ { "show-machine", no_argument, NULL, ARG_SHOW_MACHINE },
+ { "unique", no_argument, NULL, ARG_UNIQUE },
+ { "acquired", no_argument, NULL, ARG_ACQUIRED },
+ { "activatable", no_argument, NULL, ARG_ACTIVATABLE },
+ { "match", required_argument, NULL, ARG_MATCH },
+ { "host", required_argument, NULL, 'H' },
+ { "machine", required_argument, NULL, 'M' },
+ {},
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0) {
+
+ switch (c) {
+
+ case 'h':
+ return help();
+
+ case ARG_VERSION:
+ puts(PACKAGE_STRING);
+ puts(SYSTEMD_FEATURES);
+ return 0;
+
+ case ARG_NO_PAGER:
+ arg_no_pager = true;
+ break;
+
+ case ARG_USER:
+ arg_user = true;
+ break;
+
+ case ARG_SYSTEM:
+ arg_user = false;
+ break;
+
+ case ARG_ADDRESS:
+ arg_address = optarg;
+ break;
+
+ case ARG_SHOW_MACHINE:
+ arg_show_machine = true;
+ break;
+
+ case ARG_UNIQUE:
+ arg_unique = true;
+ break;
+
+ case ARG_ACQUIRED:
+ arg_acquired = true;
+ break;
+
+ case ARG_ACTIVATABLE:
+ arg_activatable = true;
+ break;
+
+ case ARG_MATCH:
+ if (strv_extend(&arg_matches, optarg) < 0)
+ return log_oom();
+ break;
+
+ case 'H':
+ arg_transport = BUS_TRANSPORT_REMOTE;
+ arg_host = optarg;
+ break;
+
+ case 'M':
+ arg_transport = BUS_TRANSPORT_CONTAINER;
+ arg_host = optarg;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+ }
+
+ if (!arg_unique && !arg_acquired && !arg_activatable)
+ arg_unique = arg_acquired = arg_activatable = true;
+
+ return 1;
+}
+
+static int busctl_main(sd_bus *bus, int argc, char *argv[]) {
+ assert(bus);
+
+ if (optind >= argc ||
+ streq(argv[optind], "list"))
+ return list_bus_names(bus, argv + optind);
+
+ if (streq(argv[optind], "monitor"))
+ return monitor(bus, argv + optind);
+
+ if (streq(argv[optind], "status"))
+ return status(bus, argv + optind);
+
+ if (streq(argv[optind], "help"))
+ return help();
+
+ log_error("Unknown command '%s'", argv[optind]);
+ return -EINVAL;
+}
+
+int main(int argc, char *argv[]) {
+ _cleanup_bus_unref_ sd_bus *bus = NULL;
+ int r;
+
+ log_parse_environment();
+ log_open();
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ goto finish;
+
+ if (arg_address) {
+ r = sd_bus_new(&bus);
+ if (r < 0) {
+ log_error("Failed to allocate bus: %s", strerror(-r));
+ goto finish;
+ }
+
+ r = sd_bus_set_address(bus, arg_address);
+ if (r < 0) {
+ log_error("Failed to set address: %s", strerror(-r));
+ goto finish;
+ }
+
+ r = sd_bus_set_bus_client(bus, true);
+ if (r < 0) {
+ log_error("Failed to set bus client: %s", strerror(-r));
+ goto finish;
+ }
+
+ r = sd_bus_start(bus);
+ } else
+ r = bus_open_transport(arg_transport, arg_host, arg_user, &bus);
+
+ if (r < 0) {
+ log_error("Failed to connect to bus: %s", strerror(-r));
+ goto finish;
+ }
+
+ r = busctl_main(bus, argc, argv);
+
+finish:
+ pager_close();
+
+ strv_free(arg_matches);
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-05 00:30:25 +0000