/***
This file is part of systemd.
Copyright 2016 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 "alloc-util.h"
#include "bus-internal.h"
#include "bus-unit-util.h"
#include "bus-util.h"
#include "cgroup-util.h"
#include "env-util.h"
#include "escape.h"
#include "hashmap.h"
#include "list.h"
#include "locale-util.h"
#include "parse-util.h"
#include "path-util.h"
#include "process-util.h"
#include "rlimit-util.h"
#include "signal-util.h"
#include "string-util.h"
#include "syslog-util.h"
#include "terminal-util.h"
#include "utf8.h"
#include "util.h"
int bus_parse_unit_info(sd_bus_message *message, UnitInfo *u) {
assert(message);
assert(u);
u->machine = NULL;
return sd_bus_message_read(
message,
"(ssssssouso)",
&u->id,
&u->description,
&u->load_state,
&u->active_state,
&u->sub_state,
&u->following,
&u->unit_path,
&u->job_id,
&u->job_type,
&u->job_path);
}
int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignment) {
const char *eq, *field;
int r, rl;
assert(m);
assert(assignment);
eq = strchr(assignment, '=');
if (!eq) {
log_error("Not an assignment: %s", assignment);
return -EINVAL;
}
r = sd_bus_message_open_container(m, SD_BUS_TYPE_STRUCT, "sv");
if (r < 0)
return bus_log_create_error(r);
field = strndupa(assignment, eq - assignment);
eq++;
if (streq(field, "CPUQuota")) {
if (isempty(eq))
r = sd_bus_message_append(m, "sv", "CPUQuotaPerSecUSec", "t", USEC_INFINITY);
else {
r = parse_percent_unbounded(eq);
if (r <= 0) {
log_error_errno(r, "CPU quota '%s' invalid.", eq);
return -EINVAL;
}
r = sd_bus_message_append(m, "sv", "CPUQuotaPerSecUSec", "t", (usec_t) r * USEC_PER_SEC / 100U);
}
goto finish;
} else if (streq(field, "EnvironmentFile")) {
r = sd_bus_message_append(m, "sv", "EnvironmentFiles", "a(sb)", 1,
eq[0] == '-' ? eq + 1 : eq,
eq[0] == '-');
goto finish;
} else if (STR_IN_SET(field, "AccuracySec", "RandomizedDelaySec", "RuntimeMaxSec")) {
char *n;
usec_t t;
size_t l;
r = parse_sec(eq, &t);
if (r < 0)
return log_error_errno(r, "Failed to parse %s= parameter: %s", field, eq);
l = strlen(field);
n = newa(char, l + 2);
if (!n)
return log_oom();
/* Change suffix Sec → USec */
strcpy(mempcpy(n, field, l - 3), "USec");
r = sd_bus_message_append(m, "sv", n, "t", t);
goto finish;
} else if (STR_IN_SET(field, "MemoryLow", "MemoryHigh", "MemoryMax", "MemoryLimit")) {
uint64_t bytes;
if (isempty(eq) || streq(eq, "infinity"))
bytes = CGROUP_LIMIT_MAX;
else {
r = parse_percent(eq);
if (r >= 0) {
char *n;
/* When this is a percentage we'll convert this into a relative value in the range
* 0…UINT32_MAX and pass it in the MemoryLowScale property (and related
* ones). This way the physical memory size can be determined server-side */
n = strjoina(field, "Scale");
r = sd_bus_message_append(m, "sv", n, "u", (uint32_t) (((uint64_t) UINT32_MAX * r) / 100U));
goto finish;
} else {
r = parse_size(eq, 1024, &bytes);
if (r < 0)
return log_error_errno(r, "Failed to parse bytes specification %s", assignment);
}
}
r = sd_bus_message_append(m, "sv", field, "t", bytes);
goto finish;
} else if (streq(field, "TasksMax")) {
uint64_t t;
if (isempty(eq) || streq(eq, "infinity"))
t = (uint64_t) -1;
else {
r = parse_percent(eq);
if (r >= 0) {
r = sd_bus_message_append(m, "sv", "TasksMaxScale", "u", (uint32_t) (((uint64_t) UINT32_MAX * r) / 100U));
goto finish;
} else {
r = safe_atou64(eq, &t);
if (r < 0)
return log_error_errno(r, "Failed to parse maximum tasks specification %s", assignment);
}
}
r = sd_bus_message_append(m, "sv", "TasksMax", "t", t);
goto finish;
}
r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, field);
if (r < 0)
return bus_log_create_error(r);
rl = rlimit_from_string(field);
if (rl >= 0) {
const char *sn;
struct rlimit l;
r = rlimit_parse(rl, eq, &l);
if (r < 0)
return log_error_errno(r, "Failed to parse resource limit: %s", eq);
r = sd_bus_message_append(m, "v", "t", l.rlim_max);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(m, SD_BUS_TYPE_STRUCT, "sv");
if (r < 0)
return bus_log_create_error(r);
sn = strjoina(field, "Soft");
r = sd_bus_message_append(m, "sv", sn, "t", l.rlim_cur);
} else if (STR_IN_SET(field,
"CPUAccounting", "MemoryAccounting", "IOAccounting", "BlockIOAccounting", "TasksAccounting",
"SendSIGHUP", "SendSIGKILL", "WakeSystem", "DefaultDependencies",
"IgnoreSIGPIPE", "TTYVHangup", "TTYReset", "RemainAfterExit",
"PrivateTmp", "PrivateDevices", "PrivateNetwork", "PrivateUsers", "NoNewPrivileges",
"SyslogLevelPrefix", "Delegate", "RemainAfterElapse", "MemoryDenyWriteExecute",
"RestrictRealtime", "DynamicUser")) {
r = parse_boolean(eq);
if (r < 0)
return log_error_errno(r, "Failed to parse boolean assignment %s.", assignment);
r = sd_bus_message_append(m, "v", "b", r);
} else if (STR_IN_SET(field, "CPUWeight", "StartupCPUWeight")) {
uint64_t u;
r = cg_weight_parse(eq, &u);
if (r < 0) {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "t", u);
} else if (STR_IN_SET(field, "CPUShares", "StartupCPUShares")) {
uint64_t u;
r = cg_cpu_shares_parse(eq, &u);
if (r < 0) {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "t", u);
} else if (STR_IN_SET(field, "IOWeight", "StartupIOWeight")) {
uint64_t u;
r = cg_weight_parse(eq, &u);
if (r < 0) {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "t", u);
} else if (STR_IN_SET(field, "BlockIOWeight", "StartupBlockIOWeight")) {
uint64_t u;
r = cg_blkio_weight_parse(eq, &u);
if (r < 0) {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "t", u);
} else if (STR_IN_SET(field,
"User", "Group", "DevicePolicy", "KillMode",
"UtmpIdentifier", "UtmpMode", "PAMName", "TTYPath",
"StandardInput", "StandardOutput", "StandardError",
"Description", "Slice", "Type", "WorkingDirectory",
"RootDirectory", "SyslogIdentifier", "ProtectSystem",
"ProtectHome", "SELinuxContext"))
r = sd_bus_message_append(m, "v", "s", eq);
else if (streq(field, "SyslogLevel")) {
int level;
level = log_level_from_string(eq);
if (level < 0) {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "i", level);
} else if (streq(field, "SyslogFacility")) {
int facility;
facility = log_facility_unshifted_from_string(eq);
if (facility < 0) {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "i", facility);
} else if (streq(field, "DeviceAllow")) {
if (isempty(eq))
r = sd_bus_message_append(m, "v", "a(ss)", 0);
else {
const char *path, *rwm, *e;
e = strchr(eq, ' ');
if (e) {
path = strndupa(eq, e - eq);
rwm = e+1;
} else {
path = eq;
rwm = "";
}
if (!path_startswith(path, "/dev")) {
log_error("%s is not a device file in /dev.", path);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "a(ss)", 1, path, rwm);
}
} else if (cgroup_io_limit_type_from_string(field) >= 0 || STR_IN_SET(field, "BlockIOReadBandwidth", "BlockIOWriteBandwidth")) {
if (isempty(eq))
r = sd_bus_message_append(m, "v", "a(st)", 0);
else {
const char *path, *bandwidth, *e;
uint64_t bytes;
e = strchr(eq, ' ');
if (e) {
path = strndupa(eq, e - eq);
bandwidth = e+1;
} else {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
if (!path_startswith(path, "/dev")) {
log_error("%s is not a device file in /dev.", path);
return -EINVAL;
}
if (streq(bandwidth, "infinity")) {
bytes = CGROUP_LIMIT_MAX;
} else {
r = parse_size(bandwidth, 1000, &bytes);
if (r < 0) {
log_error("Failed to parse byte value %s.", bandwidth);
return -EINVAL;
}
}
r = sd_bus_message_append(m, "v", "a(st)", 1, path, bytes);
}
} else if (STR_IN_SET(field, "IODeviceWeight", "BlockIODeviceWeight")) {
if (isempty(eq))
r = sd_bus_message_append(m, "v", "a(st)", 0);
else {
const char *path, *weight, *e;
uint64_t u;
e = strchr(eq, ' ');
if (e) {
path = strndupa(eq, e - eq);
weight = e+1;
} else {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
if (!path_startswith(path, "/dev")) {
log_error("%s is not a device file in /dev.", path);
return -EINVAL;
}
r = safe_atou64(weight, &u);
if (r < 0) {
log_error("Failed to parse %s value %s.", field, weight);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "a(st)", 1, path, u);
}
} else if (streq(field, "Nice")) {
int n;
r = parse_nice(eq, &n);
if (r < 0)
return log_error_errno(r, "Failed to parse nice value: %s", eq);
r = sd_bus_message_append(m, "v", "i", (int32_t) n);
} else if (STR_IN_SET(field, "Environment", "PassEnvironment")) {
const char *p;
r = sd_bus_message_open_container(m, 'v', "as");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(m, 'a', "s");
if (r < 0)
return bus_log_create_error(r);
p = eq;
for (;;) {
_cleanup_free_ char *word = NULL;
r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_CUNESCAPE);
if (r < 0) {
log_error("Failed to parse Environment value %s", eq);
return -EINVAL;
}
if (r == 0)
break;
if (streq(field, "Environment")) {
if (!env_assignment_is_valid(word)) {
log_error("Invalid environment assignment: %s", word);
return -EINVAL;
}
} else { /* PassEnvironment */
if (!env_name_is_valid(word)) {
log_error("Invalid environment variable name: %s", word);
return -EINVAL;
}
}
r = sd_bus_message_append_basic(m, 's', word);
if (r < 0)
return bus_log_create_error(r);
}
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(m);
} else if (streq(field, "KillSignal")) {
int sig;
sig = signal_from_string_try_harder(eq);
if (sig < 0) {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "i", sig);
} else if (streq(field, "TimerSlackNSec")) {
nsec_t n;
r = parse_nsec(eq, &n);
if (r < 0) {
log_error("Failed to parse %s value %s", field, eq);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "t", n);
} else if (streq(field, "OOMScoreAdjust")) {
int oa;
r = safe_atoi(eq, &oa);
if (r < 0) {
log_error("Failed to parse %s value %s", field, eq);
return -EINVAL;
}
if (!oom_score_adjust_is_valid(oa)) {
log_error("OOM score adjust value out of range");
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "i", oa);
} else if (STR_IN_SET(field, "ReadWriteDirectories", "ReadOnlyDirectories", "InaccessibleDirectories",
"ReadWritePaths", "ReadOnlyPaths", "InaccessiblePaths")) {
const char *p;
r = sd_bus_message_open_container(m, 'v', "as");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(m, 'a', "s");
if (r < 0)
return bus_log_create_error(r);
p = eq;
for (;;) {
_cleanup_free_ char *word = NULL;
int offset;
r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES);
if (r < 0) {
log_error("Failed to parse %s value %s", field, eq);
return -EINVAL;
}
if (r == 0)
break;
if (!utf8_is_valid(word)) {
log_error("Failed to parse %s value %s", field, eq);
return -EINVAL;
}
offset = word[0] == '-';
if (!path_is_absolute(word + offset)) {
log_error("Failed to parse %s value %s", field, eq);
return -EINVAL;
}
path_kill_slashes(word + offset);
r = sd_bus_message_append_basic(m, 's', word);
if (r < 0)
return bus_log_create_error(r);
}
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(m);
} else if (streq(field, "RuntimeDirectory")) {
const char *p;
r = sd_bus_message_open_container(m, 'v', "as");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(m, 'a', "s");
if (r < 0)
return bus_log_create_error(r);
p = eq;
for (;;) {
_cleanup_free_ char *word = NULL;
r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES);
if (r < 0)
return log_error_errno(r, "Failed to parse %s value %s", field, eq);
if (r == 0)
break;
r = sd_bus_message_append_basic(m, 's', word);
if (r < 0)
return bus_log_create_error(r);
}
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(m);
} else {
log_error("Unknown assignment %s.", assignment);
return -EINVAL;
}
finish:
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
return 0;
}
int bus_append_unit_property_assignment_many(sd_bus_message *m, char **l) {
char **i;
int r;
assert(m);
STRV_FOREACH(i, l) {
r = bus_append_unit_property_assignment(m, *i);
if (r < 0)
return r;
}
return 0;
}
typedef struct BusWaitForJobs {
sd_bus *bus;
Set *jobs;
char *name;
char *result;
sd_bus_slot *slot_job_removed;
sd_bus_slot *slot_disconnected;
} BusWaitForJobs;
static int match_disconnected(sd_bus_message *m, void *userdata, sd_bus_error *error) {
assert(m);
log_error("Warning! D-Bus connection terminated.");
sd_bus_close(sd_bus_message_get_bus(m));
return 0;
}
static int match_job_removed(sd_bus_message *m, void *userdata, sd_bus_error *error) {
const char *path, *unit, *result;
BusWaitForJobs *d = userdata;
uint32_t id;
char *found;
int r;
assert(m);
assert(d);
r = sd_bus_message_read(m, "uoss", &id, &path, &unit, &result);
if (r < 0) {
bus_log_parse_error(r);
return 0;
}
found = set_remove(d->jobs, (char*) path);
if (!found)
return 0;
free(found);
if (!isempty(result))
d->result = strdup(result);
if (!isempty(unit))
d->name = strdup(unit);
return 0;
}
void bus_wait_for_jobs_free(BusWaitForJobs *d) {
if (!d)
return;
set_free_free(d->jobs);
sd_bus_slot_unref(d->slot_disconnected);
sd_bus_slot_unref(d->slot_job_removed);
sd_bus_unref(d->bus);
free(d->name);
free(d->result);
free(d);
}
int bus_wait_for_jobs_new(sd_bus *bus, BusWaitForJobs **ret) {
_cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *d = NULL;
int r;
assert(bus);
assert(ret);
d = new0(BusWaitForJobs, 1);
if (!d)
return -ENOMEM;
d->bus = sd_bus_ref(bus);
/* When we are a bus client we match by sender. Direct
* connections OTOH have no initialized sender field, and
* hence we ignore the sender then */
r = sd_bus_add_match(
bus,
&d->slot_job_removed,
bus->bus_client ?
"type='signal',"
"sender='org.freedesktop.systemd1',"
"interface='org.freedesktop.systemd1.Manager',"
"member='JobRemoved',"
"path='/org/freedesktop/systemd1'" :
"type='signal',"
"interface='org.freedesktop.systemd1.Manager',"
"member='JobRemoved',"
"path='/org/freedesktop/systemd1'",
match_job_removed, d);
if (r < 0)
return r;
r = sd_bus_add_match(
bus,
&d->slot_disconnected,
"type='signal',"
"sender='org.freedesktop.DBus.Local',"
"interface='org.freedesktop.DBus.Local',"
"member='Disconnected'",
match_disconnected, d);
if (r < 0)
return r;
*ret = d;
d = NULL;
return 0;
}
static int bus_process_wait(sd_bus *bus) {
int r;
for (;;) {
r = sd_bus_process(bus, NULL);
if (r < 0)
return r;
if (r > 0)
return 0;
r = sd_bus_wait(bus, (uint64_t) -1);
if (r < 0)
return r;
}
}
static int bus_job_get_service_result(BusWaitForJobs *d, char **result) {
_cleanup_free_ char *dbus_path = NULL;
assert(d);
assert(d->name);
assert(result);
dbus_path = unit_dbus_path_from_name(d->name);
if (!dbus_path)
return -ENOMEM;
return sd_bus_get_property_string(d->bus,
"org.freedesktop.systemd1",
dbus_path,
"org.freedesktop.systemd1.Service",
"Result",
NULL,
result);
}
static const struct {
const char *result, *explanation;
} explanations [] = {
{ "resources", "of unavailable resources or another system error" },
{ "timeout", "a timeout was exceeded" },
{ "exit-code", "the control process exited with error code" },
{ "signal", "a fatal signal was delivered to the control process" },
{ "core-dump", "a fatal signal was delivered causing the control process to dump core" },
{ "watchdog", "the service failed to send watchdog ping" },
{ "start-limit", "start of the service was attempted too often" }
};
static void log_job_error_with_service_result(const char* service, const char *result, const char* const* extra_args) {
_cleanup_free_ char *service_shell_quoted = NULL;
const char *systemctl = "systemctl", *journalctl = "journalctl";
assert(service);
service_shell_quoted = shell_maybe_quote(service);
if (extra_args && extra_args[1]) {
_cleanup_free_ char *t;
t = strv_join((char**) extra_args, " ");
systemctl = strjoina("systemctl ", t ? : "");
journalctl = strjoina("journalctl ", t ? : "");
}
if (!isempty(result)) {
unsigned i;
for (i = 0; i < ELEMENTSOF(explanations); ++i)
if (streq(result, explanations[i].result))
break;
if (i < ELEMENTSOF(explanations)) {
log_error("Job for %s failed because %s.\n"
"See \"%s status %s\" and \"%s -xe\" for details.\n",
service,
explanations[i].explanation,
systemctl,
service_shell_quoted ?: "",
journalctl);
goto finish;
}
}
log_error("Job for %s failed.\n"
"See \"%s status %s\" and \"%s -xe\" for details.\n",
service,
systemctl,
service_shell_quoted ?: "",
journalctl);
finish:
/* For some results maybe additional explanation is required */
if (streq_ptr(result, "start-limit"))
log_info("To force a start use \"%1$s reset-failed %2$s\"\n"
"followed by \"%1$s start %2$s\" again.",
systemctl,
service_shell_quoted ?: "");
}
static int check_wait_response(BusWaitForJobs *d, bool quiet, const char* const* extra_args) {
int r = 0;
assert(d->result);
if (!quiet) {
if (streq(d->result, "canceled"))
log_error("Job for %s canceled.", strna(d->name));
else if (streq(d->result, "timeout"))
log_error("Job for %s timed out.", strna(d->name));
else if (streq(d->result, "dependency"))
log_error("A dependency job for %s failed. See 'journalctl -xe' for details.", strna(d->name));
else if (streq(d->result, "invalid"))
log_error("%s is not active, cannot reload.", strna(d->name));
else if (streq(d->result, "assert"))
log_error("Assertion failed on job for %s.", strna(d->name));
else if (streq(d->result, "unsupported"))
log_error("Operation on or unit type of %s not supported on this system.", strna(d->name));
else if (!streq(d->result, "done") && !streq(d->result, "skipped")) {
if (d->name) {
int q;
_cleanup_free_ char *result = NULL;
q = bus_job_get_service_result(d, &result);
if (q < 0)
log_debug_errno(q, "Failed to get Result property of service %s: %m", d->name);
log_job_error_with_service_result(d->name, result, extra_args);
} else
log_error("Job failed. See \"journalctl -xe\" for details.");
}
}
if (streq(d->result, "canceled"))
r = -ECANCELED;
else if (streq(d->result, "timeout"))
r = -ETIME;
else if (streq(d->result, "dependency"))
r = -EIO;
else if (streq(d->result, "invalid"))
r = -ENOEXEC;
else if (streq(d->result, "assert"))
r = -EPROTO;
else if (streq(d->result, "unsupported"))
r = -EOPNOTSUPP;
else if (!streq(d->result, "done") && !streq(d->result, "skipped"))
r = -EIO;
return r;
}
int bus_wait_for_jobs(BusWaitForJobs *d, bool quiet, const char* const* extra_args) {
int r = 0;
assert(d);
while (!set_isempty(d->jobs)) {
int q;
q = bus_process_wait(d->bus);
if (q < 0)
return log_error_errno(q, "Failed to wait for response: %m");
if (d->result) {
q = check_wait_response(d, quiet, extra_args);
/* Return the first error as it is most likely to be
* meaningful. */
if (q < 0 && r == 0)
r = q;
log_debug_errno(q, "Got result %s/%m for job %s", strna(d->result), strna(d->name));
}
d->name = mfree(d->name);
d->result = mfree(d->result);
}
return r;
}
int bus_wait_for_jobs_add(BusWaitForJobs *d, const char *path) {
int r;
assert(d);
r = set_ensure_allocated(&d->jobs, &string_hash_ops);
if (r < 0)
return r;
return set_put_strdup(d->jobs, path);
}
int bus_wait_for_jobs_one(BusWaitForJobs *d, const char *path, bool quiet) {
int r;
r = bus_wait_for_jobs_add(d, path);
if (r < 0)
return log_oom();
return bus_wait_for_jobs(d, quiet, NULL);
}
int bus_deserialize_and_dump_unit_file_changes(sd_bus_message *m, bool quiet, UnitFileChange **changes, unsigned *n_changes) {
const char *type, *path, *source;
int r;
/* changes is dereferenced when calling unit_file_dump_changes() later,
* so we have to make sure this is not NULL. */
assert(changes);
assert(n_changes);
r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "(sss)");
if (r < 0)
return bus_log_parse_error(r);
while ((r = sd_bus_message_read(m, "(sss)", &type, &path, &source)) > 0) {
/* We expect only "success" changes to be sent over the bus.
Hence, reject anything negative. */
UnitFileChangeType ch = unit_file_change_type_from_string(type);
if (ch < 0) {
log_notice("Manager reported unknown change type \"%s\" for path \"%s\", ignoring.", type, path);
continue;
}
r = unit_file_changes_add(changes, n_changes, ch, path, source);
if (r < 0)
return r;
}
if (r < 0)
return bus_log_parse_error(r);
r = sd_bus_message_exit_container(m);
if (r < 0)
return bus_log_parse_error(r);
unit_file_dump_changes(0, NULL, *changes, *n_changes, false);
return 0;
}
struct CGroupInfo {
char *cgroup_path;
bool is_const; /* If false, cgroup_path should be free()'d */
Hashmap *pids; /* PID → process name */
bool done;
struct CGroupInfo *parent;
LIST_FIELDS(struct CGroupInfo, siblings);
LIST_HEAD(struct CGroupInfo, children);
size_t n_children;
};
static bool IS_ROOT(const char *p) {
return isempty(p) || streq(p, "/");
}
static int add_cgroup(Hashmap *cgroups, const char *path, bool is_const, struct CGroupInfo **ret) {
struct CGroupInfo *parent = NULL, *cg;
int r;
assert(cgroups);
assert(ret);
if (IS_ROOT(path))
path = "/";
cg = hashmap_get(cgroups, path);
if (cg) {
*ret = cg;
return 0;
}
if (!IS_ROOT(path)) {
const char *e, *pp;
e = strrchr(path, '/');
if (!e)
return -EINVAL;
pp = strndupa(path, e - path);
if (!pp)
return -ENOMEM;
r = add_cgroup(cgroups, pp, false, &parent);
if (r < 0)
return r;
}
cg = new0(struct CGroupInfo, 1);
if (!cg)
return -ENOMEM;
if (is_const)
cg->cgroup_path = (char*) path;
else {
cg->cgroup_path = strdup(path);
if (!cg->cgroup_path) {
free(cg);
return -ENOMEM;
}
}
cg->is_const = is_const;
cg->parent = parent;
r = hashmap_put(cgroups, cg->cgroup_path, cg);
if (r < 0) {
if (!is_const)
free(cg->cgroup_path);
free(cg);
return r;
}
if (parent) {
LIST_PREPEND(siblings, parent->children, cg);
parent->n_children++;
}
*ret = cg;
return 1;
}
static int add_process(
Hashmap *cgroups,
const char *path,
pid_t pid,
const char *name) {
struct CGroupInfo *cg;
int r;
assert(cgroups);
assert(name);
assert(pid > 0);
r = add_cgroup(cgroups, path, true, &cg);
if (r < 0)
return r;
r = hashmap_ensure_allocated(&cg->pids, &trivial_hash_ops);
if (r < 0)
return r;
return hashmap_put(cg->pids, PID_TO_PTR(pid), (void*) name);
}
static void remove_cgroup(Hashmap *cgroups, struct CGroupInfo *cg) {
assert(cgroups);
assert(cg);
while (cg->children)
remove_cgroup(cgroups, cg->children);
hashmap_remove(cgroups, cg->cgroup_path);
if (!cg->is_const)
free(cg->cgroup_path);
hashmap_free(cg->pids);
if (cg->parent)
LIST_REMOVE(siblings, cg->parent->children, cg);
free(cg);
}
static int cgroup_info_compare_func(const void *a, const void *b) {
const struct CGroupInfo *x = *(const struct CGroupInfo* const*) a, *y = *(const struct CGroupInfo* const*) b;
assert(x);
assert(y);
return strcmp(x->cgroup_path, y->cgroup_path);
}
static int dump_processes(
Hashmap *cgroups,
const char *cgroup_path,
const char *prefix,
unsigned n_columns,
OutputFlags flags) {
struct CGroupInfo *cg;
int r;
assert(prefix);
if (IS_ROOT(cgroup_path))
cgroup_path = "/";
cg = hashmap_get(cgroups, cgroup_path);
if (!cg)
return 0;
if (!hashmap_isempty(cg->pids)) {
const char *name;
size_t n = 0, i;
pid_t *pids;
void *pidp;
Iterator j;
int width;
/* Order processes by their PID */
pids = newa(pid_t, hashmap_size(cg->pids));
HASHMAP_FOREACH_KEY(name, pidp, cg->pids, j)
pids[n++] = PTR_TO_PID(pidp);
assert(n == hashmap_size(cg->pids));
qsort_safe(pids, n, sizeof(pid_t), pid_compare_func);
width = DECIMAL_STR_WIDTH(pids[n-1]);
for (i = 0; i < n; i++) {
_cleanup_free_ char *e = NULL;
const char *special;
bool more;
name = hashmap_get(cg->pids, PID_TO_PTR(pids[i]));
assert(name);
if (n_columns != 0) {
unsigned k;
k = MAX(LESS_BY(n_columns, 2U + width + 1U), 20U);
e = ellipsize(name, k, 100);
if (e)
name = e;
}
more = i+1 < n || cg->children;
special = special_glyph(more ? TREE_BRANCH : TREE_RIGHT);
fprintf(stdout, "%s%s%*"PID_PRI" %s\n",
prefix,
special,
width, pids[i],
name);
}
}
if (cg->children) {
struct CGroupInfo **children, *child;
size_t n = 0, i;
/* Order subcgroups by their name */
children = newa(struct CGroupInfo*, cg->n_children);
LIST_FOREACH(siblings, child, cg->children)
children[n++] = child;
assert(n == cg->n_children);
qsort_safe(children, n, sizeof(struct CGroupInfo*), cgroup_info_compare_func);
if (n_columns != 0)
n_columns = MAX(LESS_BY(n_columns, 2U), 20U);
for (i = 0; i < n; i++) {
_cleanup_free_ char *pp = NULL;
const char *name, *special;
bool more;
child = children[i];
name = strrchr(child->cgroup_path, '/');
if (!name)
return -EINVAL;
name++;
more = i+1 < n;
special = special_glyph(more ? TREE_BRANCH : TREE_RIGHT);
fputs(prefix, stdout);
fputs(special, stdout);
fputs(name, stdout);
fputc('\n', stdout);
special = special_glyph(more ? TREE_VERTICAL : TREE_SPACE);
pp = strappend(prefix, special);
if (!pp)
return -ENOMEM;
r = dump_processes(cgroups, child->cgroup_path, pp, n_columns, flags);
if (r < 0)
return r;
}
}
cg->done = true;
return 0;
}
static int dump_extra_processes(
Hashmap *cgroups,
const char *prefix,
unsigned n_columns,
OutputFlags flags) {
_cleanup_free_ pid_t *pids = NULL;
_cleanup_hashmap_free_ Hashmap *names = NULL;
struct CGroupInfo *cg;
size_t n_allocated = 0, n = 0, k;
Iterator i;
int width, r;
/* Prints the extra processes, i.e. those that are in cgroups we haven't displayed yet. We show them as
* combined, sorted, linear list. */
HASHMAP_FOREACH(cg, cgroups, i) {
const char *name;
void *pidp;
Iterator j;
if (cg->done)
continue;
if (hashmap_isempty(cg->pids))
continue;
r = hashmap_ensure_allocated(&names, &trivial_hash_ops);
if (r < 0)
return r;
if (!GREEDY_REALLOC(pids, n_allocated, n + hashmap_size(cg->pids)))
return -ENOMEM;
HASHMAP_FOREACH_KEY(name, pidp, cg->pids, j) {
pids[n++] = PTR_TO_PID(pidp);
r = hashmap_put(names, pidp, (void*) name);
if (r < 0)
return r;
}
}
if (n == 0)
return 0;
qsort_safe(pids, n, sizeof(pid_t), pid_compare_func);
width = DECIMAL_STR_WIDTH(pids[n-1]);
for (k = 0; k < n; k++) {
_cleanup_free_ char *e = NULL;
const char *name;
name = hashmap_get(names, PID_TO_PTR(pids[k]));
assert(name);
if (n_columns != 0) {
unsigned z;
z = MAX(LESS_BY(n_columns, 2U + width + 1U), 20U);
e = ellipsize(name, z, 100);
if (e)
name = e;
}
fprintf(stdout, "%s%s %*" PID_PRI " %s\n",
prefix,
special_glyph(TRIANGULAR_BULLET),
width, pids[k],
name);
}
return 0;
}
int unit_show_processes(
sd_bus *bus,
const char *unit,
const char *cgroup_path,
const char *prefix,
unsigned n_columns,
OutputFlags flags,
sd_bus_error *error) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
Hashmap *cgroups = NULL;
struct CGroupInfo *cg;
int r;
assert(bus);
assert(unit);
if (flags & OUTPUT_FULL_WIDTH)
n_columns = 0;
else if (n_columns <= 0)
n_columns = columns();
prefix = strempty(prefix);
r = sd_bus_call_method(
bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"GetUnitProcesses",
error,
&reply,
"s",
unit);
if (r < 0)
return r;
cgroups = hashmap_new(&string_hash_ops);
if (!cgroups)
return -ENOMEM;
r = sd_bus_message_enter_container(reply, 'a', "(sus)");
if (r < 0)
goto finish;
for (;;) {
const char *path = NULL, *name = NULL;
uint32_t pid;
r = sd_bus_message_read(reply, "(sus)", &path, &pid, &name);
if (r < 0)
goto finish;
if (r == 0)
break;
r = add_process(cgroups, path, pid, name);
if (r < 0)
goto finish;
}
r = sd_bus_message_exit_container(reply);
if (r < 0)
goto finish;
r = dump_processes(cgroups, cgroup_path, prefix, n_columns, flags);
if (r < 0)
goto finish;
r = dump_extra_processes(cgroups, prefix, n_columns, flags);
finish:
while ((cg = hashmap_first(cgroups)))
remove_cgroup(cgroups, cg);
hashmap_free(cgroups);
return r;
}