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-rw-r--r--src/shared/cgroup-util.c122
-rw-r--r--src/shared/cgroup-util.h1
2 files changed, 96 insertions, 27 deletions
diff --git a/src/shared/cgroup-util.c b/src/shared/cgroup-util.c
index 9dfab2eaac..3d12233a1b 100644
--- a/src/shared/cgroup-util.c
+++ b/src/shared/cgroup-util.c
@@ -36,6 +36,7 @@
#include "util.h"
#include "path-util.h"
#include "strv.h"
+#include "unit-name.h"
int cg_enumerate_processes(const char *controller, const char *path, FILE **_f) {
char *fs;
@@ -1210,11 +1211,76 @@ int cg_pid_get_cgroup(pid_t pid, char **root, char **cgroup) {
return 0;
}
-int cg_pid_get_unit(pid_t pid, char **unit) {
+static int instance_unit_from_cgroup(char **cgroup){
+ char *at;
+
+ assert(cgroup);
+
+ at = memchr(*cgroup, '@', strlen(*cgroup));
+ if (at && at[1] == '.') {
+ char *i, *s;
+
+ /* This is a templated service */
+ i = memchr(at, '/', strlen(at));
+ if(!i)
+ return -EIO;
+
+ s = strndup(at + 1, i - at);
+ if (!s)
+ return -ENOMEM;
+
+ i = strdup(i + 1);
+ if (!i) {
+ free(s);
+ return -ENOMEM;
+ }
+
+ strcpy(at + 1, i);
+ strcpy(at + strlen(i) + 1, s);
+ at[strlen(at) - 1] = '\0';
+
+ free(i);
+ free(s);
+ }
+
+ return 0;
+}
+
+static int cgroup_to_unit(char *cgroup, char **unit){
int r;
- char *cgroup, *p, *at, *b;
+ char *b, *p;
size_t k;
+ assert(cgroup);
+ assert(unit);
+
+ r = instance_unit_from_cgroup(&cgroup);
+ if (r < 0)
+ return r;
+
+ p = strrchr(cgroup, '/') + 1;
+ k = strlen(p);
+
+ b = strndup(p, k);
+
+ if (!b)
+ return -ENOMEM;
+
+ r = unit_name_is_valid(b, true);
+ if (!r) {
+ free(b);
+ return -ENOENT;
+ }
+
+ *unit = b;
+
+ return 0;
+}
+
+int cg_pid_get_unit(pid_t pid, char **unit) {
+ int r;
+ char *cgroup;
+
assert(pid >= 0);
assert(unit);
@@ -1227,38 +1293,40 @@ int cg_pid_get_unit(pid_t pid, char **unit) {
return -ENOENT;
}
- p = cgroup + 8;
- k = strcspn(p, "/");
+ r = cgroup_to_unit(cgroup, unit);
+ if (r < 0){
+ free(cgroup);
+ return r;
+ }
- at = memchr(p, '@', k);
- if (at && at[1] == '.') {
- size_t j;
+ free(cgroup);
- /* This is a templated service */
- if (p[k] != '/') {
- free(cgroup);
- return -EIO;
- }
+ return 0;
+}
- j = strcspn(p+k+1, "/");
+int cg_pid_get_user_unit(pid_t pid, char **unit) {
+ int r;
+ char *cgroup;
- b = malloc(k + j + 1);
+ assert(pid >= 0);
+ assert(unit);
- if (b) {
- memcpy(b, p, at - p + 1);
- memcpy(b + (at - p) + 1, p + k + 1, j);
- memcpy(b + (at - p) + 1 + j, at + 1, k - (at - p) - 1);
- b[k+j] = 0;
- }
- } else
- b = strndup(p, k);
+ r = cg_pid_get_cgroup(pid, NULL, &cgroup);
+ if (r < 0)
+ return r;
- free(cgroup);
+ if (!startswith(cgroup, "/user/")) {
+ free(cgroup);
+ return -ENOENT;
+ }
- if (!b)
- return -ENOMEM;
+ r = cgroup_to_unit(cgroup, unit);
+ if (r < 0) {
+ free(cgroup);
+ return r;
+ }
- *unit = b;
- return 0;
+ free(cgroup);
+ return 0;
}
diff --git a/src/shared/cgroup-util.h b/src/shared/cgroup-util.h
index f663fba687..2429ba2430 100644
--- a/src/shared/cgroup-util.h
+++ b/src/shared/cgroup-util.h
@@ -71,5 +71,6 @@ int cg_is_empty_recursive(const char *controller, const char *path, bool ignore_
int cg_get_user_path(char **path);
int cg_pid_get_cgroup(pid_t pid, char **root, char **cgroup);
int cg_pid_get_unit(pid_t pid, char **unit);
+int cg_pid_get_user_unit(pid_t pid, char **unit);
char **cg_shorten_controllers(char **controllers);