/*-*- 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 .
***/
#include
#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 bool arg_legend = true;
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);
if (arg_legend) {
printf("%-*s %*s %-*s %-*s %-*s %-*s %-*s %-*s",
(int) max_i, "NAME", 10, "PID", 15, "PROCESS", 16, "USER", 13, "CONNECTION", 25, "UNIT", 10, "SESSION", 19, "CONNECTION-NAME");
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|
SD_BUS_CREDS_CONNECTION_NAME, &creds);
if (r >= 0) {
const char *unique, *session, *unit, *cn;
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);
r = sd_bus_creds_get_connection_name(creds, &cn);
if (r >= 0)
printf(" %-19s", cn);
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, NULL, 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, NULL, *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, 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(&creds, pid, _SD_BUS_CREDS_ALL);
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"
" --no-legend Do not show the headers and footers\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_NO_LEGEND,
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 },
{ "no-legend", no_argument, NULL, ARG_NO_LEGEND },
{ "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_NO_LEGEND:
arg_legend = false;
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_close_unref_ sd_bus *bus = NULL;
int r;
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
goto finish;
r = sd_bus_new(&bus);
if (r < 0) {
log_error("Failed to allocate bus: %s", strerror(-r));
goto finish;
}
if (streq_ptr(argv[optind], "monitor")) {
r = sd_bus_set_monitor(bus, true);
if (r < 0) {
log_error("Failed to set monitor mode: %s", strerror(-r));
goto finish;
}
r = sd_bus_negotiate_creds(bus, _SD_BUS_CREDS_ALL);
if (r < 0) {
log_error("Failed to enable credentials: %s", strerror(-r));
goto finish;
}
r = sd_bus_negotiate_timestamp(bus, true);
if (r < 0) {
log_error("Failed to enable timestamps: %s", strerror(-r));
goto finish;
}
r = sd_bus_negotiate_fds(bus, true);
if (r < 0) {
log_error("Failed to enable fds: %s", strerror(-r));
goto finish;
}
}
if (arg_address)
r = sd_bus_set_address(bus, arg_address);
else {
switch (arg_transport) {
case BUS_TRANSPORT_LOCAL:
if (arg_user)
r = bus_set_address_user(bus);
else
r = bus_set_address_system(bus);
break;
case BUS_TRANSPORT_REMOTE:
r = bus_set_address_system_remote(bus, arg_host);
break;
case BUS_TRANSPORT_CONTAINER:
r = bus_set_address_system_container(bus, arg_host);
break;
default:
assert_not_reached("Hmm, unknown transport type.");
}
}
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);
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;
}