-/***
- 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 "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 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"
+ " -u --unit Show the subtrees of specified system units\n"
+ " --user-unit Show the subtrees of specified 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[]) {
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':
assert_not_reached("Unhandled option");
}
- if (arg_machine && arg_show_unit != SHOW_UNIT_NONE) {
- log_error("Cannot combine --unit or --user-unit with --machine=.");
- return -EINVAL;
- }
+ 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 1;
}
static void show_cg_info(const char *controller, const char *path) {
- if (!cg_all_unified() && 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_show_color(true);
log_parse_environment();
log_open();
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 |
r = bus_connect_transport_systemd(BUS_TRANSPORT_LOCAL, NULL,
arg_show_unit == SHOW_UNIT_USER,
&bus);
- if (r < 0) {
- log_error_errno(r, "Failed to create bus connection: %m");
- goto finish;
- }
+ 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);
/* Query root only if needed, treat error as fatal */
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");
}
q = cg_split_spec(*name, &c, &p);
controller = c ?: SYSTEMD_CGROUP_CONTROLLER;
if (p) {
- j = strjoin(root, "/", p);
- if (!j) {
- r = log_oom();
- goto finish;
- }
+ j = path_join(root, p);
+ if (!j)
+ return log_oom();
- path_kill_slashes(j);
+ path_simplify(j, false);
path = j;
} else
path = root;
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);
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();
- free(arg_names); /* don't free the strings */
-
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+ return 0;
}
+
+DEFINE_MAIN_FUNCTION(run);
projects / thirdparty / systemd.git / blobdiff