-/***
- This file is part of systemd.
-
- Copyright 2010 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/>.
-***/
+/* SPDX-License-Identifier: LGPL-2.1+ */
#include <errno.h>
#include <getopt.h>
#include "sd-bus.h"
#include "alloc-util.h"
-#include "bus-error.h"
#include "bus-util.h"
#include "cgroup-show.h"
#include "cgroup-util.h"
#include "fileio.h"
#include "log.h"
+#include "main-func.h"
#include "output-mode.h"
#include "pager.h"
#include "path-util.h"
+#include "pretty-print.h"
+#include "strv.h"
#include "unit-name.h"
#include "util.h"
-static bool arg_no_pager = false;
+static PagerFlags arg_pager_flags = 0;
static bool arg_kernel_threads = false;
static bool arg_all = false;
+
+static enum {
+ SHOW_UNIT_NONE,
+ SHOW_UNIT_SYSTEM,
+ SHOW_UNIT_USER,
+} arg_show_unit = SHOW_UNIT_NONE;
+static char **arg_names = NULL;
+
static int arg_full = -1;
-static char* arg_machine = NULL;
+static const char* arg_machine = NULL;
+
+STATIC_DESTRUCTOR_REGISTER(arg_names, freep); /* don't free the strings */
+
+static int help(void) {
+ _cleanup_free_ char *link = NULL;
+ int r;
+
+ r = terminal_urlify_man("systemd-cgls", "1", &link);
+ if (r < 0)
+ return log_oom();
-static void help(void) {
printf("%s [OPTIONS...] [CGROUP...]\n\n"
"Recursively show control group contents.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --no-pager Do not pipe output into a pager\n"
" -a --all Show all groups, including empty\n"
+ " -u --unit Show the subtrees of specifified system units\n"
+ " --user-unit Show the subtrees of specifified user units\n"
" -l --full Do not ellipsize output\n"
" -k Include kernel threads in output\n"
" -M --machine= Show container\n"
- , program_invocation_short_name);
+ "\nSee the %s for details.\n"
+ , program_invocation_short_name
+ , link
+ );
+
+ return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_NO_PAGER = 0x100,
ARG_VERSION,
+ ARG_USER_UNIT,
};
static const struct option options[] = {
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, ARG_VERSION },
- { "no-pager", no_argument, NULL, ARG_NO_PAGER },
- { "all", no_argument, NULL, 'a' },
- { "full", no_argument, NULL, 'l' },
- { "machine", required_argument, NULL, 'M' },
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ { "all", no_argument, NULL, 'a' },
+ { "full", no_argument, NULL, 'l' },
+ { "machine", required_argument, NULL, 'M' },
+ { "unit", optional_argument, NULL, 'u' },
+ { "user-unit", optional_argument, NULL, ARG_USER_UNIT },
{}
};
assert(argc >= 1);
assert(argv);
- while ((c = getopt_long(argc, argv, "hkalM:", options, NULL)) >= 0)
+ while ((c = getopt_long(argc, argv, "-hkalM:u::", options, NULL)) >= 0)
switch (c) {
case 'h':
- help();
- return 0;
+ return help();
case ARG_VERSION:
return version();
case ARG_NO_PAGER:
- arg_no_pager = true;
+ arg_pager_flags |= PAGER_DISABLE;
break;
case 'a':
arg_all = true;
break;
+ case 'u':
+ arg_show_unit = SHOW_UNIT_SYSTEM;
+ if (strv_push(&arg_names, optarg) < 0) /* push optarg if not empty */
+ return log_oom();
+ break;
+
+ case ARG_USER_UNIT:
+ arg_show_unit = SHOW_UNIT_USER;
+ if (strv_push(&arg_names, optarg) < 0) /* push optarg if not empty */
+ return log_oom();
+ break;
+
+ case 1:
+ /* positional argument */
+ if (strv_push(&arg_names, optarg) < 0)
+ return log_oom();
+ break;
+
case 'l':
arg_full = true;
break;
assert_not_reached("Unhandled option");
}
- return 1;
-}
-
-static int get_cgroup_root(char **ret) {
- _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
- _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
- _cleanup_free_ char *unit = NULL, *path = NULL;
- const char *m;
- int r;
-
- if (!arg_machine) {
- r = cg_get_root_path(ret);
- if (r == -ENOMEDIUM)
- return log_error_errno(r, "Failed to get root control group path: No cgroup filesystem mounted on /sys/fs/cgroup");
- else if (r < 0)
- return log_error_errno(r, "Failed to get root control group path: %m");
+ if (arg_machine && arg_show_unit != SHOW_UNIT_NONE)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Cannot combine --unit or --user-unit with --machine=.");
- return 0;
- }
-
- m = strjoina("/run/systemd/machines/", arg_machine);
- r = parse_env_file(m, NEWLINE, "SCOPE", &unit, NULL);
- if (r < 0)
- return log_error_errno(r, "Failed to load machine data: %m");
-
- path = unit_dbus_path_from_name(unit);
- if (!path)
- return log_oom();
-
- r = bus_connect_transport_systemd(BUS_TRANSPORT_LOCAL, NULL, false, &bus);
- if (r < 0)
- return log_error_errno(r, "Failed to create bus connection: %m");
-
- r = sd_bus_get_property_string(
- bus,
- "org.freedesktop.systemd1",
- path,
- unit_dbus_interface_from_name(unit),
- "ControlGroup",
- &error,
- ret);
- if (r < 0)
- return log_error_errno(r, "Failed to query unit control group path: %s", bus_error_message(&error, r));
-
- return 0;
+ return 1;
}
static void show_cg_info(const char *controller, const char *path) {
- if (cg_all_unified() <= 0 && controller && !streq(controller, SYSTEMD_CGROUP_CONTROLLER))
+ if (cg_all_unified() == 0 && controller && !streq(controller, SYSTEMD_CGROUP_CONTROLLER))
printf("Controller %s; ", controller);
- printf("Control group %s:\n", isempty(path) ? "/" : path);
+ printf("Control group %s:\n", empty_to_root(path));
fflush(stdout);
}
-int main(int argc, char *argv[]) {
+static int run(int argc, char *argv[]) {
int r, output_flags;
log_parse_environment();
r = parse_argv(argc, argv);
if (r <= 0)
- goto finish;
+ return r;
- if (!arg_no_pager) {
- r = pager_open(arg_no_pager, false);
- if (r > 0 && arg_full < 0)
- arg_full = true;
- }
+ r = pager_open(arg_pager_flags);
+ if (r > 0 && arg_full < 0)
+ arg_full = true;
output_flags =
arg_all * OUTPUT_SHOW_ALL |
(arg_full > 0) * OUTPUT_FULL_WIDTH |
arg_kernel_threads * OUTPUT_KERNEL_THREADS;
- if (optind < argc) {
+ if (arg_names) {
+ _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
_cleanup_free_ char *root = NULL;
- int i;
-
- r = get_cgroup_root(&root);
- if (r < 0)
- goto finish;
+ char **name;
- for (i = optind; i < argc; i++) {
+ STRV_FOREACH(name, arg_names) {
int q;
- if (path_startswith(argv[i], "/sys/fs/cgroup")) {
+ if (arg_show_unit != SHOW_UNIT_NONE) {
+ /* Command line arguments are unit names */
+ _cleanup_free_ char *cgroup = NULL;
+
+ if (!bus) {
+ /* Connect to the bus only if necessary */
+ r = bus_connect_transport_systemd(BUS_TRANSPORT_LOCAL, NULL,
+ arg_show_unit == SHOW_UNIT_USER,
+ &bus);
+ if (r < 0)
+ return log_error_errno(r, "Failed to create bus connection: %m");
+ }
+
+ q = show_cgroup_get_unit_path_and_warn(bus, *name, &cgroup);
+ if (q < 0)
+ goto failed;
- printf("Directory %s:\n", argv[i]);
+ if (isempty(cgroup)) {
+ log_warning("Unit %s not found.", *name);
+ q = -ENOENT;
+ goto failed;
+ }
+
+ printf("Unit %s (%s):\n", *name, cgroup);
fflush(stdout);
- q = show_cgroup_by_path(argv[i], NULL, 0, output_flags);
+ q = show_cgroup_by_path(cgroup, NULL, 0, output_flags);
+
+ } else if (path_startswith(*name, "/sys/fs/cgroup")) {
+
+ printf("Directory %s:\n", *name);
+ fflush(stdout);
+
+ q = show_cgroup_by_path(*name, NULL, 0, output_flags);
} else {
_cleanup_free_ char *c = NULL, *p = NULL, *j = NULL;
const char *controller, *path;
- r = cg_split_spec(argv[i], &c, &p);
- if (r < 0) {
- log_error_errno(r, "Failed to split argument %s: %m", argv[i]);
- goto finish;
+ if (!root) {
+ /* Query root only if needed, treat error as fatal */
+ r = show_cgroup_get_path_and_warn(arg_machine, NULL, &root);
+ if (r < 0)
+ return log_error_errno(r, "Failed to list cgroup tree: %m");
+ }
+
+ q = cg_split_spec(*name, &c, &p);
+ if (q < 0) {
+ log_error_errno(q, "Failed to split argument %s: %m", *name);
+ goto failed;
}
controller = c ?: SYSTEMD_CGROUP_CONTROLLER;
if (p) {
j = strjoin(root, "/", p);
- if (!j) {
- r = log_oom();
- goto finish;
- }
+ if (!j)
+ return log_oom();
- path_kill_slashes(j);
+ path_simplify(j, false);
path = j;
} else
path = root;
q = show_cgroup(controller, path, NULL, 0, output_flags);
}
- if (q < 0)
+ failed:
+ if (q < 0 && r >= 0)
r = q;
}
if (!arg_machine) {
_cleanup_free_ char *cwd = NULL;
- cwd = get_current_dir_name();
- if (!cwd) {
- r = log_error_errno(errno, "Cannot determine current working directory: %m");
- goto finish;
- }
+ r = safe_getcwd(&cwd);
+ if (r < 0)
+ return log_error_errno(r, "Cannot determine current working directory: %m");
if (path_startswith(cwd, "/sys/fs/cgroup")) {
printf("Working directory %s:\n", cwd);
if (!done) {
_cleanup_free_ char *root = NULL;
- r = get_cgroup_root(&root);
+ r = show_cgroup_get_path_and_warn(arg_machine, NULL, &root);
if (r < 0)
- goto finish;
+ return log_error_errno(r, "Failed to list cgroup tree: %m");
show_cg_info(SYSTEMD_CGROUP_CONTROLLER, root);
r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, root, NULL, 0, output_flags);
}
}
-
if (r < 0)
- log_error_errno(r, "Failed to list cgroup tree: %m");
+ return log_error_errno(r, "Failed to list cgroup tree: %m");
-finish:
- pager_close();
-
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+ return 0;
}
+
+DEFINE_MAIN_FUNCTION(run);
projects / thirdparty / systemd.git / blobdiff