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cgroup-util: add pidref+full counter parts for cg_pid_get_user_unit()

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This completes the set of functions for getting the user unit of a
process, mirroring the four functions we already have for the system
unit.
This commit is contained in:
Lennart Poettering
2025-08-27 14:01:44 +02:00
committed by Daan De Meyer
parent ece4df0293
commit 015025cba2
3 changed files with 42 additions and 8 deletions
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34
src/basic/cgroup-util.c
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@@ -1157,7 +1157,7 @@ static const char* skip_user_prefix(const char *path) {
return skip_session(e);
}
int cg_path_get_user_unit(const char *path, char **ret) {
int cg_path_get_user_unit_full(const char *path, char **ret_unit, char **ret_subgroup) {
const char *t;
assert(path);
@@ -1168,18 +1168,42 @@ int cg_path_get_user_unit(const char *path, char **ret) {
/* And from here on it looks pretty much the same as for a system unit, hence let's use the same
* parser. */
return cg_path_get_unit(t, ret);
return cg_path_get_unit_full(t, ret_unit, ret_subgroup);
}
int cg_pid_get_user_unit(pid_t pid, char **ret_unit) {
_cleanup_free_ char *cgroup = NULL;
int cg_pid_get_user_unit_full(pid_t pid, char **ret_unit, char **ret_subgroup) {
int r;
_cleanup_free_ char *cgroup = NULL;
r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
if (r < 0)
return r;
return cg_path_get_user_unit(cgroup, ret_unit);
return cg_path_get_user_unit_full(cgroup, ret_unit, ret_subgroup);
}
int cg_pidref_get_user_unit_full(const PidRef *pidref, char **ret_unit, char **ret_subgroup) {
int r;
if (!pidref_is_set(pidref))
return -ESRCH;
if (pidref_is_remote(pidref))
return -EREMOTE;
_cleanup_free_ char *unit = NULL, *subgroup = NULL;
r = cg_pid_get_user_unit_full(pidref->pid, &unit, &subgroup);
if (r < 0)
return r;
r = pidref_verify(pidref);
if (r < 0)
return r;
if (ret_unit)
*ret_unit = TAKE_PTR(unit);
if (ret_subgroup)
*ret_subgroup = TAKE_PTR(subgroup);
return 0;
}
int cg_path_get_machine_name(const char *path, char **ret_machine) {

14
src/basic/cgroup-util.h
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@@ -208,7 +208,10 @@ static inline int cg_path_get_unit(const char *path, char **ret_unit) {
return cg_path_get_unit_full(path, ret_unit, NULL);
}
int cg_path_get_unit_path(const char *path, char **ret_unit);
int cg_path_get_user_unit(const char *path, char **ret_unit);
int cg_path_get_user_unit_full(const char *path, char **ret_unit, char **ret_subgroup);
static inline int cg_path_get_user_unit(const char *path, char **ret_unit) {
return cg_path_get_user_unit_full(path, ret_unit, NULL);
}
int cg_path_get_machine_name(const char *path, char **ret_machine);
int cg_path_get_slice(const char *path, char **ret_slice);
int cg_path_get_user_slice(const char *path, char **ret_slice);
@@ -228,7 +231,14 @@ int cg_pidref_get_unit_full(const PidRef *pidref, char **ret_unit, char **ret_su
static inline int cg_pidref_get_unit(const PidRef *pidref, char **ret_unit) {
return cg_pidref_get_unit_full(pidref, ret_unit, NULL);
}
int cg_pid_get_user_unit(pid_t pid, char **ret_unit);
int cg_pid_get_user_unit_full(pid_t pid, char **ret_unit, char **ret_subgroup);
static inline int cg_pid_get_user_unit(pid_t pid, char **ret_unit) {
return cg_pid_get_unit_full(pid, ret_unit, NULL);
}
int cg_pidref_get_user_unit_full(const PidRef *pidref, char **ret_unit, char **ret_subgroup);
static inline int cg_pidref_get_user_unit(const PidRef *pidref, char **ret_unit) {
return cg_pidref_get_user_unit_full(pidref, ret_unit, NULL);
}
int cg_pid_get_machine_name(pid_t pid, char **ret_machine);
int cg_pid_get_slice(pid_t pid, char **ret_slice);
int cg_pid_get_user_slice(pid_t pid, char **ret_slice);

2
src/coredump/coredump.c
View File

@@ -1483,7 +1483,7 @@ static int gather_pid_metadata_from_procfs(struct iovec_wrapper *iovw, Context *
if (cg_pidref_get_unit(&context->pidref, &t) >= 0)
(void) iovw_put_string_field_free(iovw, "COREDUMP_UNIT=", t);
if (cg_pid_get_user_unit(pid, &t) >= 0)
if (cg_pidref_get_user_unit(&context->pidref, &t) >= 0)
(void) iovw_put_string_field_free(iovw, "COREDUMP_USER_UNIT=", t);
if (cg_pidref_get_session(&context->pidref, &t) >= 0)