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-rw-r--r--src/cgls.c164
1 files changed, 164 insertions, 0 deletions
diff --git a/src/cgls.c b/src/cgls.c
new file mode 100644
index 0000000000..d5417f9505
--- /dev/null
+++ b/src/cgls.c
@@ -0,0 +1,164 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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 General Public License as published by
+ the Free Software Foundation; either version 2 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <limits.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <getopt.h>
+#include <string.h>
+
+#include "cgroup-show.h"
+#include "cgroup-util.h"
+#include "log.h"
+#include "util.h"
+#include "pager.h"
+
+static bool arg_no_pager = false;
+static bool arg_kernel_threads = false;
+
+static void help(void) {
+
+ printf("%s [OPTIONS...] [CGROUP...]\n\n"
+ "Recursively show control group contents.\n\n"
+ " -h --help Show this help\n"
+ " --no-pager Do not pipe output into a pager\n"
+ " -k Include kernel threads in output\n",
+ program_invocation_short_name);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_NO_PAGER = 0x100
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ { NULL, 0, NULL, 0 }
+ };
+
+ int c;
+
+ assert(argc >= 1);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "hk", options, NULL)) >= 0) {
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_NO_PAGER:
+ arg_no_pager = true;
+ break;
+
+ case 'k':
+ arg_kernel_threads = true;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+ }
+
+ return 1;
+}
+
+int main(int argc, char *argv[]) {
+ int r = 0, retval = EXIT_FAILURE;
+
+ log_parse_environment();
+ log_open();
+
+ r = parse_argv(argc, argv);
+ if (r < 0)
+ goto finish;
+ else if (r == 0) {
+ retval = EXIT_SUCCESS;
+ goto finish;
+ }
+
+ if (!arg_no_pager)
+ pager_open();
+
+ if (optind < argc) {
+ unsigned i;
+
+ for (i = (unsigned) optind; i < (unsigned) argc; i++) {
+ int q;
+ printf("%s:\n", argv[i]);
+
+ q = show_cgroup_by_path(argv[i], NULL, 0, arg_kernel_threads);
+ if (q < 0)
+ r = q;
+ }
+
+ } else {
+ 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")) {
+ printf("Working Directory %s:\n", p);
+ r = show_cgroup_by_path(p, NULL, 0, arg_kernel_threads);
+ } else {
+ char *root = NULL;
+ const char *t = NULL;
+
+ r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &root);
+ if (r < 0)
+ t = "/";
+ else {
+ if (endswith(root, "/system"))
+ root[strlen(root)-7] = 0;
+
+ t = root[0] ? root : "/";
+ }
+
+ r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, t, NULL, 0, arg_kernel_threads);
+ free(root);
+ }
+
+ free(p);
+ }
+
+ if (r < 0)
+ log_error("Failed to list cgroup tree: %s", strerror(-r));
+
+ retval = EXIT_SUCCESS;
+
+finish:
+ pager_close();
+
+ return retval;
+}