122 lines
2.7 KiB
C
122 lines
2.7 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <libcgroup.h>
|
|
|
|
void visit_node(struct cgroup_file_info *info, char *root)
|
|
{
|
|
if (info->type == CGROUP_FILE_TYPE_DIR) {
|
|
printf("path %s, parent %s, relative %s, full %s\n",
|
|
info->path, info->parent, info->full_path +
|
|
+ strlen(root) - 1,
|
|
info->full_path);
|
|
}
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
int ret;
|
|
char *controller;
|
|
void *handle;
|
|
struct cgroup_file_info info;
|
|
char root[FILENAME_MAX];
|
|
int lvl, i;
|
|
|
|
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);
|
|
}
|
|
strcpy(root, info.full_path);
|
|
printf("Begin pre-order walk\n");
|
|
printf("root is %s\n", root);
|
|
visit_node(&info, root);
|
|
while ((ret = cgroup_walk_tree_next(0, &handle, &info, lvl)) !=
|
|
ECGEOF) {
|
|
visit_node(&info, root);
|
|
}
|
|
cgroup_walk_tree_end(&handle);
|
|
|
|
printf("pre-order walk finished\n");
|
|
ret = cgroup_walk_tree_begin(controller, "/", 0, &handle, &info, &lvl);
|
|
|
|
if (ret != 0) {
|
|
fprintf(stderr, "Walk failed\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
ret = cgroup_walk_tree_set_flags(&handle, CGROUP_WALK_TYPE_POST_DIR);
|
|
|
|
if (ret) {
|
|
fprintf(stderr, "Walk failed with %s\n", cgroup_strerror(ret));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
strcpy(root, info.full_path);
|
|
printf("Begin post-order walk\n");
|
|
printf("root is %s\n", root);
|
|
visit_node(&info, root);
|
|
while ((ret = cgroup_walk_tree_next(0, &handle, &info, lvl)) !=
|
|
ECGEOF) {
|
|
visit_node(&info, root);
|
|
}
|
|
cgroup_walk_tree_end(&handle);
|
|
printf("post order walk finished\n");
|
|
|
|
ret = cgroup_walk_tree_begin(controller, "/a", 2, &handle, &info, &lvl);
|
|
|
|
if (ret != 0) {
|
|
fprintf(stderr, "Walk failed\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
strcpy(root, info.full_path);
|
|
printf("root is %s\n", root);
|
|
visit_node(&info, root);
|
|
while ((ret = cgroup_walk_tree_next(2, &handle, &info, lvl)) !=
|
|
ECGEOF) {
|
|
visit_node(&info, root);
|
|
}
|
|
cgroup_walk_tree_end(&handle);
|
|
|
|
/*
|
|
* Walk only the first five nodes
|
|
*/
|
|
i = 0;
|
|
printf("Walking the first 5 nodes\n");
|
|
ret = cgroup_walk_tree_begin(controller, "/", 0, &handle, &info, &lvl);
|
|
|
|
if (ret != 0) {
|
|
fprintf(stderr, "Walk failed\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
strcpy(root, info.full_path);
|
|
printf("root is %s\n", root);
|
|
visit_node(&info, root);
|
|
i++;
|
|
while ((ret = cgroup_walk_tree_next(0, &handle, &info, lvl)) !=
|
|
ECGEOF) {
|
|
visit_node(&info, root);
|
|
if (++i >= 5)
|
|
break;
|
|
}
|
|
cgroup_walk_tree_end(&handle);
|
|
return EXIT_SUCCESS;
|
|
}
|