}
}
-static int print_controller_mount(const char *controller, const char *clist,
- const char *first_path, int flags)
+static int print_controller_mount(const char *controller,
+ int flags, cont_name_t cont_names, int hierarchy)
{
int ret = 0;
void *handle;
char path[FILENAME_MAX];
- if (flags & FL_MOUNT_ALL) {
+ if (!(flags & FL_MOUNT) && !(flags & FL_HIERARCHY)) {
+ /* print only hierarchy name */
+ printf("%s\n", cont_names);
+ }
+ if (!(flags & FL_MOUNT) && (flags & FL_HIERARCHY)) {
+ /* print only hierarchy name and number*/
+ printf("%s %d\n", cont_names, hierarchy);
+ }
+ if (flags & FL_MOUNT) {
+ /* print hierarchy name and mount point(s) */
ret = cgroup_get_subsys_mount_point_begin(controller, &handle,
path);
/* intentionally ignore error from above call */
while (ret == 0) {
- printf("%s %s\n", clist, path);
+ printf("%s %s\n", cont_names, path);
+ if (!(flags & FL_MOUNT_ALL))
+ /* first mount record is enough */
+ goto stop;
ret = cgroup_get_subsys_mount_point_next(&handle, path);
}
if (ret == ECGEOF)
ret = 0;
+stop:
cgroup_get_subsys_mount_point_end(&handle);
- } else {
- printf("%s %s\n", clist, first_path);
- }
- return ret;
-}
-
-/* print data about input cont_name controller */
-static int print_controller(cont_name_t cont_name, int flags)
-{
- int ret = 0;
- char controller_list[FILENAME_MAX];
- char path[FILENAME_MAX];
- void *handle;
- struct cgroup_mount_point controller;
- int output = 0;
- char first_controller[FILENAME_MAX];
-
- ret = cgroup_get_controller_begin(&handle, &controller);
- if (ret != 0) {
- fprintf(stderr, "cannot read controller data: %s\n",
- cgroup_strerror(ret));
- return ret;
- }
-
- path[0] = '\0';
- controller_list[0] = '\0';
-
- /* go through the list of controllers */
- while (ret == 0) {
- if (strcmp(path, controller.path) == 0) {
- /* if it is still the same mount point */
- strncat(controller_list, "," ,
- FILENAME_MAX-strlen(controller_list)-1);
- strncat(controller_list, controller.name,
- FILENAME_MAX-strlen(controller_list)-1);
- } else {
- /*
- * we got new mount point
- * print the old one if needed
- */
- if (output) {
- if ((flags & FL_MOUNT) != 0)
- print_controller_mount(first_controller,
- controller_list, path,
- flags);
- else
- printf("%s\n", controller_list);
- if ((flags & FL_LIST) != 0) {
- /* we successfully finish printing */
- output = 0;
- break;
- }
- }
-
- output = 0;
- strncpy(controller_list, controller.name, FILENAME_MAX);
- controller_list[FILENAME_MAX-1] = '\0';
- strncpy(path, controller.path, FILENAME_MAX);
- path[FILENAME_MAX-1] = '\0';
- strncpy(first_controller, controller.name,
- FILENAME_MAX);
- first_controller[FILENAME_MAX-1] = '\0';
- }
-
- /* set output flag */
- if ((!output) && (!(flags & FL_LIST) ||
- (strcmp(controller.name, cont_name) == 0)))
- output = 1;
-
- /* the actual controller should not be printed */
- ret = cgroup_get_controller_next(&handle, &controller);
- }
-
- if (output) {
- if ((flags & FL_MOUNT) != 0)
- print_controller_mount(first_controller,
- controller_list, path, flags);
- else
- printf("%s\n", controller_list);
- if ((flags & FL_LIST) != 0)
- ret = 0;
}
-
- cgroup_get_controller_end(&handle);
return ret;
-
-}
-
-/* list the controllers */
-static int cgroup_list_controllers(const char *tname,
- cont_name_t cont_name[CG_CONTROLLER_MAX], int flags)
-{
- int ret = 0;
- int final_ret = 0;
- int i = 0;
-
- /* initialize libcgroup */
- ret = cgroup_init();
-
- if (ret) {
- if (flags & FL_ALL) {
- return 0;
- } else {
- return ret;
- }
- }
-
- if ((flags & FL_LIST) == 0) {
- /* we have to print all controllers */
- ret = print_controller(NULL, flags);
- if (ret == ECGEOF)
- final_ret = 0;
- else
- fprintf(stderr, "controllers can't be listed: %s\n",
- cgroup_strerror(ret));
- } else
- /* we have he list of controllers which should be print */
- while ((i < CG_CONTROLLER_MAX) && (cont_name[i][0] != '\0')
- && ((ret == ECGEOF) || (ret == 0))) {
- ret = print_controller(cont_name[i], flags);
- if (ret != 0) {
- if (ret == ECGEOF)
- /* controller was not found */
- final_ret = ECGFAIL;
- else
- /* other problem */
- final_ret = ret;
- fprintf(stderr,
- "%s: cannot find group %s: %s\n",
- tname, cont_name[i],
- cgroup_strerror(final_ret));
- }
- i++;
- }
-
- return final_ret;
}
/* display all controllers attached to the given hierarchy */
void *handle;
struct controller_data info;
int first = 1;
+ cont_name_t cont_names;
cont_name_t cont_name;
int init = 1;
if (info.hierarchy != hierarchy)
goto next;
- /* the first controller in the hierrachy*/
if (first) {
- /*
- * if mounted flag is set then
- * test whether it is mounted
- */
- if ((flags & FL_MOUNT) && (init == 1)) {
- memset(cont_name, 0, FILENAME_MAX);
- strncpy(cont_name, info.name,
- FILENAME_MAX-1);
-
- ret = print_controller(cont_name,
- flags + FL_LIST);
- /*
- * mount point was found,
- * output is done
- */
- if (ret == 0) {
- cgroup_get_all_controller_end(
- &handle);
- return 0;
- }
- }
- printf("%s", info.name);
+ /* the first controller in the hierarchy */
+ memset(cont_name, 0, FILENAME_MAX);
+ strncpy(cont_name, info.name, FILENAME_MAX-1);
+ memset(cont_names, 0, FILENAME_MAX);
+ strncpy(cont_names, info.name, FILENAME_MAX-1);
first = 0;
- } else
- printf(",%s", info.name);
-
+ } else {
+ /* the next controller in the hierarchy */
+ strncat(cont_names, ",", FILENAME_MAX-1);
+ strncat(cont_names, info.name, FILENAME_MAX-1);
+ }
next:
ret = cgroup_get_all_controller_next(&handle, &info);
- if (ret && ret != ECGEOF) {
- fprintf(stderr,
- "%s: cgroup_get_controller_next failed (%s)\n",
- tname, cgroup_strerror(ret));
- cgroup_get_all_controller_end(&handle);
- return ret;
- }
+ if (ret && ret != ECGEOF)
+ goto end;
}
+ ret = print_controller_mount(cont_name,
+ flags, cont_names, hierarchy);
+
+end:
cgroup_get_all_controller_end(&handle);
- if (flags & FL_HIERARCHY)
- printf(" %d\n", hierarchy);
- else
- printf("\n");
if (ret == ECGEOF)
ret = 0;
return ret;
}
+
/* go through the list of all controllers gather them based on hierarchy number
and print them */
-static int cgroup_list_all_controllers(const char *tname, int flags)
+static int cgroup_list_all_controllers(const char *tname,
+ cont_name_t cont_name[CG_CONTROLLER_MAX], int c_number, int flags)
{
int ret = 0;
void *handle;
int h_list[CG_CONTROLLER_MAX]; /* list of hierarchies */
int counter = 0;
int j;
+ int is_on_list = 0;
ret = cgroup_get_all_controller_begin(&handle, &info);
while (ret != ECGEOF) {
if (info.hierarchy == 0) {
/* the controller is not attached to any hierrachy */
- printf("%s\n", info.name);
- } else {
- /* the controller is attached to some hierarchy */
+ if (flags & FL_ALL)
+ /* display only if -a flag is set */
+ printf("%s\n", info.name);
+ }
+ is_on_list = 0;
+ j = 0;
+ while ((is_on_list == 0) && (j < c_number)) {
+ if (strcmp(info.name, cont_name[j]) == 0) {
+ is_on_list = 1;
+ break;
+ }
+ j++;
+ }
+
+ if ((info.hierarchy != 0) &&
+ ((flags & FL_ALL) ||
+ (!(flags & FL_LIST) || (is_on_list == 1)))) {
+ /* the controller is attached to some hierarchy
+ and either should be output all controllers,
+ or the controller is on the output list */
+
h_list[counter] = info.hierarchy;
counter++;
for (j = 0; j < counter-1; j++) {
/* read the list of controllers */
while (optind < argc) {
- if (flags & FL_ALL) {
- fprintf(stderr, "Warning: too many parameters\n");
- break;
- }
flags |= FL_LIST;
strncpy(cont_name[c_number], argv[optind], FILENAME_MAX);
cont_name[c_number][FILENAME_MAX-1] = '\0';
}
}
- if (flags & FL_ALL)
- /* print the information about all controllers */
- ret = cgroup_list_all_controllers(argv[0], flags);
- else
- /* print information about mounted controllers */
- ret = cgroup_list_controllers(argv[0], cont_name, flags);
+ ret = cgroup_list_all_controllers(argv[0], cont_name, c_number, flags);
return ret;
}
projects / thirdparty / libcgroup.git / commitdiff
