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// SPDX-License-Identifier: LGPL-2.1-only
#include <libcgroup.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
int read_stats(char *path, char *controller)
{
struct cgroup_stat stat;
void *handle;
int ret;
ret = cgroup_read_stats_begin(controller, path, &handle, &stat);
if (ret != 0) {
fprintf(stderr, "stats read failed\n");
return -1;
}
printf("Stats for %s:\n", path);
printf("%s: %s", stat.name, stat.value);
while ((ret = cgroup_read_stats_next(&handle, &stat)) !=
ECGEOF) {
printf("%s: %s", stat.name, stat.value);
}
cgroup_read_stats_end(&handle);
printf("\n");
return 0;
}
int main(int argc, char *argv[])
{
struct cgroup_file_info info;
char cgroup_path[FILENAME_MAX];
char *controller;
int root_len;
void *handle;
int lvl;
int ret;
if (argc < 2) {
fprintf(stderr, "Usage %s: <controller name>\n",
argv[0]);
exit(EXIT_FAILURE);
}
controller = argv[1];
ret = cgroup_init();
if (ret != 0) {
fprintf(stderr, "init failed\n");
exit(EXIT_FAILURE);
}
ret = cgroup_walk_tree_begin(controller, "/", 0, &handle, &info, &lvl);
if (ret != 0) {
fprintf(stderr, "Walk failed\n");
exit(EXIT_FAILURE);
}
root_len = strlen(info.full_path) - 1;
strncpy(cgroup_path, info.path, FILENAME_MAX - 1);
ret = read_stats(cgroup_path, controller);
if (ret < 0)
exit(EXIT_FAILURE);
while ((ret = cgroup_walk_tree_next(0, &handle, &info, lvl)) !=
ECGEOF) {
if (info.type != CGROUP_FILE_TYPE_DIR)
continue;
strncpy(cgroup_path, info.full_path + root_len, FILENAME_MAX - 1);
strcat(cgroup_path, "/");
ret = read_stats(cgroup_path, controller);
if (ret < 0)
exit(EXIT_FAILURE);
}
cgroup_walk_tree_end(&handle);
return EXIT_SUCCESS;
}
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