src/cgls/cgls.c

	cgls.c revision c33b329709ebe2755181980a050d02ec7c81ed87
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering/***
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering  This file is part of systemd.
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering  Copyright 2010 Lennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering  systemd is free software; you can redistribute it and/or modify it
5430f7f2bc7330f3088b894166bf3524a067e3d8Lennart Poettering  under the terms of the GNU Lesser General Public License as published by
5430f7f2bc7330f3088b894166bf3524a067e3d8Lennart Poettering  the Free Software Foundation; either version 2.1 of the License, or
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering  (at your option) any later version.
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering  systemd is distributed in the hope that it will be useful, but
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering  WITHOUT ANY WARRANTY; without even the implied warranty of
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
5430f7f2bc7330f3088b894166bf3524a067e3d8Lennart Poettering  Lesser General Public License for more details.
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
5430f7f2bc7330f3088b894166bf3524a067e3d8Lennart Poettering  You should have received a copy of the GNU Lesser General Public License
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering  along with systemd; If not, see <http://www.gnu.org/licenses/>.
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering***/
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering#include <limits.h>
0ac38b707212e9aa40e25d65ffbae648cc9116f5Lennart Poettering#include <stdio.h>
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering#include <unistd.h>
81527be142678057215665be66e4b3c8306a7ab3Lennart Poettering#include <errno.h>
81527be142678057215665be66e4b3c8306a7ab3Lennart Poettering#include <getopt.h>
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering#include <string.h>
0284adc6a60ce0af1107cb0b50041a65d731f39eLennart Poettering
0284adc6a60ce0af1107cb0b50041a65d731f39eLennart Poettering#include "cgroup-show.h"
0284adc6a60ce0af1107cb0b50041a65d731f39eLennart Poettering#include "cgroup-util.h"
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering#include "log.h"
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek#include "path-util.h"
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek#include "util.h"
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek#include "pager.h"
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering#include "build.h"
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering#include "output-mode.h"
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering#include "fileio.h"
3c1668da6202f1ead3d4d3981b89e9da1a0e98e3Lennart Poettering#include "sd-bus.h"
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering#include "bus-util.h"
de190aef08bb267b645205a747762df573b36834Lennart Poettering#include "bus-error.h"
95ea1b90cc61f464f3b9bc147119dee4ba9620b8Lennart Poettering#include "unit-name.h"
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poetteringstatic bool arg_no_pager = false;
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poetteringstatic bool arg_kernel_threads = false;
95ea1b90cc61f464f3b9bc147119dee4ba9620b8Lennart Poetteringstatic bool arg_all = false;
95ea1b90cc61f464f3b9bc147119dee4ba9620b8Lennart Poetteringstatic int arg_full = -1;
0ac38b707212e9aa40e25d65ffbae648cc9116f5Lennart Poetteringstatic char* arg_machine = NULL;
16e9f408fa9a9626059bdd6c89dc175e06b9e976Lennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poetteringstatic void help(void) {
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering        printf("%s [OPTIONS...] [CGROUP...]\n\n"
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering               "Recursively show control group contents.\n\n"
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering               "  -h --help           Show this help\n"
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering               "     --version        Show package version\n"
c2373f848dddcc1827cf715c5ef778dc8d475761Lennart Poettering               "     --no-pager       Do not pipe output into a pager\n"
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering               "  -a --all            Show all groups, including empty\n"
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering               "  -l --full           Do not ellipsize output\n"
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering               "  -k                  Include kernel threads in output\n"
c2373f848dddcc1827cf715c5ef778dc8d475761Lennart Poettering               "  -M --machine        Show container\n"
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering               , program_invocation_short_name);
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering}
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
c2373f848dddcc1827cf715c5ef778dc8d475761Lennart Poetteringstatic int parse_argv(int argc, char *argv[]) {
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
feb12d3ed2c7f9132c64773c7c41b9e3a608a814Lennart Poettering        enum {
b0af6f41ea67c97b8beb16fd1d63042379bbf103Lennart Poettering                ARG_NO_PAGER = 0x100,
feb12d3ed2c7f9132c64773c7c41b9e3a608a814Lennart Poettering                ARG_VERSION,
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering        };
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
de190aef08bb267b645205a747762df573b36834Lennart Poettering        static const struct option options[] = {
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                { "help",      no_argument,       NULL, 'h'          },
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                { "version",   no_argument,       NULL, ARG_VERSION  },
de190aef08bb267b645205a747762df573b36834Lennart Poettering                { "no-pager",  no_argument,       NULL, ARG_NO_PAGER },
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                { "all",       no_argument,       NULL, 'a'          },
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                { "full",      no_argument,       NULL, 'l'          },
de190aef08bb267b645205a747762df573b36834Lennart Poettering                { "machine",   required_argument, NULL, 'M'          },
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                {}
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering        };
de190aef08bb267b645205a747762df573b36834Lennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering        int c;
de190aef08bb267b645205a747762df573b36834Lennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering        assert(argc >= 1);
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering        assert(argv);
de190aef08bb267b645205a747762df573b36834Lennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering        while ((c = getopt_long(argc, argv, "hkalM:", options, NULL)) >= 0)
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
de190aef08bb267b645205a747762df573b36834Lennart Poettering                switch (c) {
de190aef08bb267b645205a747762df573b36834Lennart Poettering
de190aef08bb267b645205a747762df573b36834Lennart Poettering                case 'h':
de190aef08bb267b645205a747762df573b36834Lennart Poettering                        help();
de190aef08bb267b645205a747762df573b36834Lennart Poettering                        return 0;
de190aef08bb267b645205a747762df573b36834Lennart Poettering
de190aef08bb267b645205a747762df573b36834Lennart Poettering                case ARG_VERSION:
de190aef08bb267b645205a747762df573b36834Lennart Poettering                        puts(PACKAGE_STRING);
de190aef08bb267b645205a747762df573b36834Lennart Poettering                        puts(SYSTEMD_FEATURES);
de190aef08bb267b645205a747762df573b36834Lennart Poettering                        return 0;
de190aef08bb267b645205a747762df573b36834Lennart Poettering
de190aef08bb267b645205a747762df573b36834Lennart Poettering                case ARG_NO_PAGER:
de190aef08bb267b645205a747762df573b36834Lennart Poettering                        arg_no_pager = true;
de190aef08bb267b645205a747762df573b36834Lennart Poettering                        break;
de190aef08bb267b645205a747762df573b36834Lennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                case 'a':
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                        arg_all = true;
de190aef08bb267b645205a747762df573b36834Lennart Poettering                        break;
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                case 'l':
de190aef08bb267b645205a747762df573b36834Lennart Poettering                        arg_full = true;
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                        break;
de190aef08bb267b645205a747762df573b36834Lennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                case 'k':
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                        arg_kernel_threads = true;
de190aef08bb267b645205a747762df573b36834Lennart Poettering                        break;
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                case 'M':
de190aef08bb267b645205a747762df573b36834Lennart Poettering                        arg_machine = optarg;
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                        break;
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
de190aef08bb267b645205a747762df573b36834Lennart Poettering                case '?':
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                        return -EINVAL;
7560fffcd2531786b9c1ca657667a43e90331326Lennart Poettering
7560fffcd2531786b9c1ca657667a43e90331326Lennart Poettering                default:
0ac38b707212e9aa40e25d65ffbae648cc9116f5Lennart Poettering                        assert_not_reached("Unhandled option");
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                }
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        return 1;
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek}
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmekint main(int argc, char *argv[]) {
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        int r = 0, retval = EXIT_FAILURE;
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        int output_flags;
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        _cleanup_free_ char *root = NULL;
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        _cleanup_bus_close_unref_ sd_bus *bus = NULL;
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        log_parse_environment();
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        log_open();
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        r = parse_argv(argc, argv);
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        if (r < 0)
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                goto finish;
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        else if (r == 0) {
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                retval = EXIT_SUCCESS;
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                goto finish;
0ac38b707212e9aa40e25d65ffbae648cc9116f5Lennart Poettering        }
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        if (!arg_no_pager) {
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                r = pager_open(false);
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                if (r > 0) {
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                        if (arg_full == -1)
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                                arg_full = true;
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                }
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        }
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        output_flags =
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                arg_all * OUTPUT_SHOW_ALL |
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                (arg_full > 0) * OUTPUT_FULL_WIDTH;
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        r = bus_open_transport(BUS_TRANSPORT_LOCAL, NULL, false, &bus);
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        if (r < 0) {
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                log_error_errno(r, "Failed to create bus connection: %m");
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                goto finish;
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        }
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek        if (optind < argc) {
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                int i;
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                for (i = optind; i < argc; i++) {
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                        int q;
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                        fprintf(stdout, "%s:\n", argv[i]);
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                        fflush(stdout);
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                        if (arg_machine)
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                                root = strjoin("machine/", arg_machine, "/", argv[i], NULL);
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                        else
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                                root = strdup(argv[i]);
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                        if (!root)
6ad1d1c30621280bfad3e63fcc1c7ceb7d8ffa98Lennart Poettering                                return log_oom();
143bfdaf0b890fa7acadf02d1eafacaef1b696bdHolger Hans Peter Freyther
143bfdaf0b890fa7acadf02d1eafacaef1b696bdHolger Hans Peter Freyther                        q = show_cgroup_by_path(root, NULL, 0,
143bfdaf0b890fa7acadf02d1eafacaef1b696bdHolger Hans Peter Freyther                                                arg_kernel_threads, output_flags);
143bfdaf0b890fa7acadf02d1eafacaef1b696bdHolger Hans Peter Freyther                        if (q < 0)
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                                r = q;
6eb7a9a0010d035e5bdbbf70227088ce02b2120eZbigniew Jędrzejewski-Szmek                }
95ea1b90cc61f464f3b9bc147119dee4ba9620b8Lennart Poettering
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering        } else {
87d2c1ff6a7375f03476767e6f59454bcc5cd04bLennart Poettering                _cleanup_free_ char *p;

                p = get_current_dir_name();
                if (!p) {
                        log_error("Cannot determine current working directory: %m");
                        goto finish;
                }

                if (path_startswith(p, "/sys/fs/cgroup") && !arg_machine) {
                        printf("Working Directory %s:\n", p);
                        r = show_cgroup_by_path(p, NULL, 0,
                                                arg_kernel_threads, output_flags);
                } else {
                        if (arg_machine) {
                                char *m;
                                const char *cgroup;
                                _cleanup_free_ char *scope = NULL;
                                _cleanup_free_ char *path = NULL;
                                _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
                                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;

                                m = strappenda("/run/systemd/machines/", arg_machine);
                                r = parse_env_file(m, NEWLINE, "SCOPE", &scope, NULL);
                                if (r < 0) {
                                        log_error_errno(r, "Failed to get machine path: %m");
                                        goto finish;
                                }

                                path = unit_dbus_path_from_name(scope);
                                if (!path) {
                                        log_oom();
                                        goto finish;
                                }

                                r = sd_bus_get_property(
                                                bus,
                                                "org.freedesktop.systemd1",
                                                path,
                                                "org.freedesktop.systemd1.Scope",
                                                "ControlGroup",
                                                &error,
                                                &reply,
                                                "s");

                                if (r < 0) {
                                        log_error("Failed to query ControlGroup: %s", bus_error_message(&error, -r));
                                        goto finish;
                                }

                                r = sd_bus_message_read(reply, "s", &cgroup);
                                if (r < 0) {
                                        bus_log_parse_error(r);
                                        goto finish;
                                }

                                root = strdup(cgroup);
                                if (!root) {
                                        log_oom();
                                        goto finish;
                                }

                        } else
                                r = cg_get_root_path(&root);
                        if (r < 0) {
                                log_error_errno(r, "Failed to get %s path: %m",
                                                arg_machine ? "machine" : "root");
                                goto finish;
                        }

                        r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, root, NULL, 0,
                                        arg_kernel_threads, output_flags);
                }
        }

        if (r < 0) {
                log_error_errno(r, "Failed to list cgroup tree %s: %m", root);
                retval = EXIT_FAILURE;
        } else
                retval = EXIT_SUCCESS;

finish:
        pager_close();

        return retval;
}