./tools/notsd-move

1 files changed, 288 insertions, 0 deletions

diff --git a/src/systemd-cgls/cgls.c b/src/systemd-cgls/cgls.c
new file mode 100644
index 0000000000..b8703e7f17
--- /dev/null
+++ b/src/systemd-cgls/cgls.c
@@ -0,0 +1,288 @@
+/***
+  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/>.
+***/
+
+#include <errno.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <systemd/sd-bus.h>
+
+#include "sd-bus/bus-error.h"
+#include "sd-bus/bus-util.h"
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/cgroup-util.h"
+#include "systemd-basic/fileio.h"
+#include "systemd-basic/log.h"
+#include "systemd-basic/path-util.h"
+#include "systemd-basic/unit-name.h"
+#include "systemd-basic/util.h"
+#include "systemd-shared/cgroup-show.h"
+#include "systemd-shared/output-mode.h"
+#include "systemd-shared/pager.h"
+
+static bool arg_no_pager = false;
+static bool arg_kernel_threads = false;
+static bool arg_all = false;
+static int arg_full = -1;
+static char* arg_machine = NULL;
+
+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"
+               "  -l --full           Do not ellipsize output\n"
+               "  -k                  Include kernel threads in output\n"
+               "  -M --machine=       Show container\n"
+               , program_invocation_short_name);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+        enum {
+                ARG_NO_PAGER = 0x100,
+                ARG_VERSION,
+        };
+
+        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'          },
+                {}
+        };
+
+        int c;
+
+        assert(argc >= 1);
+        assert(argv);
+
+        while ((c = getopt_long(argc, argv, "hkalM:", options, NULL)) >= 0)
+
+                switch (c) {
+
+                case 'h':
+                        help();
+                        return 0;
+
+                case ARG_VERSION:
+                        return version();
+
+                case ARG_NO_PAGER:
+                        arg_no_pager = true;
+                        break;
+
+                case 'a':
+                        arg_all = true;
+                        break;
+
+                case 'l':
+                        arg_full = true;
+                        break;
+
+                case 'k':
+                        arg_kernel_threads = true;
+                        break;
+
+                case 'M':
+                        arg_machine = optarg;
+                        break;
+
+                case '?':
+                        return -EINVAL;
+
+                default:
+                        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");
+
+                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;
+}
+
+static void show_cg_info(const char *controller, const char *path) {
+
+        if (cg_unified() <= 0 && controller && !streq(controller, SYSTEMD_CGROUP_CONTROLLER))
+                printf("Controller %s; ", controller);
+
+        printf("Control group %s:\n", isempty(path) ? "/" : path);
+        fflush(stdout);
+}
+
+int main(int argc, char *argv[]) {
+        int r, output_flags;
+
+        log_parse_environment();
+        log_open();
+
+        r = parse_argv(argc, argv);
+        if (r <= 0)
+                goto finish;
+
+        if (!arg_no_pager) {
+                r = pager_open(arg_no_pager, false);
+                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) {
+                _cleanup_free_ char *root = NULL;
+                int i;
+
+                r = get_cgroup_root(&root);
+                if (r < 0)
+                        goto finish;
+
+                for (i = optind; i < argc; i++) {
+                        int q;
+
+                        if (path_startswith(argv[i], "/sys/fs/cgroup")) {
+
+                                printf("Directory %s:\n", argv[i]);
+                                fflush(stdout);
+
+                                q = show_cgroup_by_path(argv[i], 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;
+                                }
+
+                                controller = c ?: SYSTEMD_CGROUP_CONTROLLER;
+                                if (p) {
+                                        j = strjoin(root, "/", p, NULL);
+                                        if (!j) {
+                                                r = log_oom();
+                                                goto finish;
+                                        }
+
+                                        path_kill_slashes(j);
+                                        path = j;
+                                } else
+                                        path = root;
+
+                                show_cg_info(controller, path);
+
+                                q = show_cgroup(controller, path, NULL, 0, output_flags);
+                        }
+
+                        if (q < 0)
+                                r = q;
+                }
+
+        } else {
+                bool done = false;
+
+                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;
+                        }
+
+                        if (path_startswith(cwd, "/sys/fs/cgroup")) {
+                                printf("Working directory %s:\n", cwd);
+                                fflush(stdout);
+
+                                r = show_cgroup_by_path(cwd, NULL, 0, output_flags);
+                                done = true;
+                        }
+                }
+
+                if (!done) {
+                        _cleanup_free_ char *root = NULL;
+
+                        r = get_cgroup_root(&root);
+                        if (r < 0)
+                                goto finish;
+
+                        show_cg_info(SYSTEMD_CGROUP_CONTROLLER, root);
+
+                        printf("-.slice\n");
+                        r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, root, NULL, 0, output_flags);
+                }
+        }
+
+        if (r < 0)
+                log_error_errno(r, "Failed to list cgroup tree: %m");
+
+finish:
+        pager_close();
+
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}