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-rw-r--r--src/cgls/cgls.c210
1 files changed, 111 insertions, 99 deletions
diff --git a/src/cgls/cgls.c b/src/cgls/cgls.c
index b8d1d2ccaf..fae9398aa5 100644
--- a/src/cgls/cgls.c
+++ b/src/cgls/cgls.c
@@ -54,7 +54,7 @@ static void help(void) {
" -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"
+ " -M --machine= Show container\n"
, program_invocation_short_name);
}
@@ -123,146 +123,158 @@ static int parse_argv(int argc, char *argv[]) {
return 1;
}
-int main(int argc, char *argv[]) {
- int r = 0, retval = EXIT_FAILURE;
- int output_flags;
- _cleanup_free_ char *root = NULL;
+static int get_cgroup_root(char **ret) {
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_bus_flush_close_unref_ 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 < 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_open_transport(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: %m");
+
+ return 0;
+}
+
+int main(int argc, char *argv[]) {
+ int r, output_flags;
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
- if (r < 0)
+ if (r <= 0)
goto finish;
- else if (r == 0) {
- retval = EXIT_SUCCESS;
- goto finish;
- }
if (!arg_no_pager) {
r = pager_open(false);
- if (r > 0) {
- if (arg_full == -1)
- arg_full = true;
- }
+ if (r > 0 && arg_full < 0)
+ arg_full = true;
}
output_flags =
arg_all * OUTPUT_SHOW_ALL |
(arg_full > 0) * OUTPUT_FULL_WIDTH;
- r = bus_open_transport(BUS_TRANSPORT_LOCAL, NULL, false, &bus);
- if (r < 0) {
- log_error_errno(r, "Failed to create bus connection: %m");
- goto finish;
- }
-
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;
- fprintf(stdout, "%s:\n", argv[i]);
- fflush(stdout);
-
- if (arg_machine)
- root = strjoin("machine/", arg_machine, "/", argv[i], NULL);
- else
- root = strdup(argv[i]);
- if (!root)
- return log_oom();
-
- q = show_cgroup_by_path(root, NULL, 0,
- arg_kernel_threads, output_flags);
- if (q < 0)
- r = q;
- }
+ if (path_startswith(argv[i], "/sys/fs/cgroup")) {
- } else {
- _cleanup_free_ char *p;
+ printf("Directory %s:\n", argv[i]);
+ fflush(stdout);
- p = get_current_dir_name();
- if (!p) {
- log_error_errno(errno, "Cannot determine current working directory: %m");
- goto finish;
- }
+ q = show_cgroup_by_path(argv[i], NULL, 0, arg_kernel_threads, output_flags);
+ } else {
+ _cleanup_free_ char *c = NULL, *p = NULL, *j = NULL;
+ const char *controller, *path;
- 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 *unit = 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 = strjoina("/run/systemd/machines/", arg_machine);
- r = parse_env_file(m, NEWLINE, "SCOPE", &unit, NULL);
+ r = cg_split_spec(argv[i], &c, &p);
if (r < 0) {
- log_error_errno(r, "Failed to get machine path: %m");
+ log_error_errno(r, "Failed to split argument %s: %m", argv[i]);
goto finish;
}
- path = unit_dbus_path_from_name(unit);
- if (!path) {
- log_oom();
- goto finish;
- }
+ controller = c ?: SYSTEMD_CGROUP_CONTROLLER;
+ if (p) {
+ j = strjoin(root, "/", p, NULL);
+ if (!j) {
+ r = log_oom();
+ goto finish;
+ }
- r = sd_bus_get_property(
- bus,
- "org.freedesktop.systemd1",
- path,
- endswith(unit, ".scope") ? "org.freedesktop.systemd1.Scope" : "org.freedesktop.systemd1.Service",
- "ControlGroup",
- &error,
- &reply,
- "s");
+ path_kill_slashes(j);
+ path = j;
+ } else
+ path = root;
- if (r < 0) {
- log_error("Failed to query ControlGroup: %s", bus_error_message(&error, -r));
- goto finish;
- }
+ printf("Controller %s; control group %s:\n", controller, path);
+ fflush(stdout);
- r = sd_bus_message_read(reply, "s", &cgroup);
- if (r < 0) {
- bus_log_parse_error(r);
- goto finish;
- }
+ q = show_cgroup(controller, path, NULL, 0, arg_kernel_threads, output_flags);
+ }
- root = strdup(cgroup);
- if (!root) {
- log_oom();
- goto finish;
- }
+ if (q < 0)
+ r = q;
+ }
+
+ } else {
+ bool done = false;
- } else
- r = cg_get_root_path(&root);
- if (r < 0) {
- log_error_errno(r, "Failed to get %s path: %m",
- arg_machine ? "machine" : "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 = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, root, NULL, 0,
- arg_kernel_threads, output_flags);
+ if (path_startswith(cwd, "/sys/fs/cgroup")) {
+ printf("Working directory %s:\n", cwd);
+ fflush(stdout);
+
+ r = show_cgroup_by_path(cwd, NULL, 0, arg_kernel_threads, output_flags);
+ done = true;
+ }
+ }
+
+ if (!done) {
+ _cleanup_free_ char *root = NULL;
+
+ r = get_cgroup_root(&root);
+ if (r < 0)
+ goto finish;
+
+ printf("Control group %s:\n", root);
+ fflush(stdout);
+
+ 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;
+ if (r < 0)
+ log_error_errno(r, "Failed to list cgroup tree: %m");
finish:
pager_close();
- return retval;
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-15 23:38:05 +0000