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cgroup: make sure the user cannot accidentaly unmount our cgroup filesystem
[elogind.git]
/
src
/
manager.c
diff --git
a/src/manager.c
b/src/manager.c
index c93b7912eb7df42b3bf6343db611fd1bc59f2c97..5e627ba9c674dd14b030882aed7335f06818ac0a 100644
(file)
--- a/
src/manager.c
+++ b/
src/manager.c
@@
-197,6
+197,7
@@
static int manager_setup_signals(Manager *m) {
int manager_new(ManagerRunningAs running_as, bool confirm_spawn, Manager **_m) {
Manager *m;
int r = -ENOMEM;
int manager_new(ManagerRunningAs running_as, bool confirm_spawn, Manager **_m) {
Manager *m;
int r = -ENOMEM;
+ char *p;
assert(_m);
assert(running_as >= 0);
assert(_m);
assert(running_as >= 0);
@@
-211,6
+212,7
@@
int manager_new(ManagerRunningAs running_as, bool confirm_spawn, Manager **_m) {
m->confirm_spawn = confirm_spawn;
m->name_data_slot = -1;
m->exit_code = _MANAGER_EXIT_CODE_INVALID;
m->confirm_spawn = confirm_spawn;
m->name_data_slot = -1;
m->exit_code = _MANAGER_EXIT_CODE_INVALID;
+ m->pin_cgroupfs_fd = -1;
m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = m->dev_autofs_fd = -1;
m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = m->dev_autofs_fd = -1;
m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
@@
-256,6
+258,14
@@
int manager_new(ManagerRunningAs running_as, bool confirm_spawn, Manager **_m) {
(r = bus_init_api(m)) < 0)
goto fail;
(r = bus_init_api(m)) < 0)
goto fail;
+ if (asprintf(&p, "%s/%s", m->cgroup_mount_point, m->cgroup_hierarchy) < 0) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ m->pin_cgroupfs_fd = open(p, O_RDONLY|O_CLOEXEC|O_DIRECTORY|O_NOCTTY|O_NONBLOCK);
+ free(p);
+
*_m = m;
return 0;
*_m = m;
return 0;
@@
-446,9
+456,13
@@
void manager_free(Manager *m) {
free(m->cgroup_controller);
free(m->cgroup_hierarchy);
free(m->cgroup_controller);
free(m->cgroup_hierarchy);
+ free(m->cgroup_mount_point);
hashmap_free(m->cgroup_bondings);
hashmap_free(m->cgroup_bondings);
+ if (m->pin_cgroupfs_fd >= 0)
+ close_nointr_nofail(m->pin_cgroupfs_fd);
+
free(m);
}
free(m);
}