namespace-util: introduce userns_enter_and_pin() helper

which generalizes forking a process into userns and freeze() Addresses https://github.com/systemd/systemd/pull/35833/files#r1905508153
2025-01-11 15:53:14 +01:00
parent c7704ecd04
commit 8c2c8235a6
3 changed files with 22 additions and 45 deletions
@@ -87,6 +87,7 @@ int parse_userns_uid_range(const char *s, uid_t *ret_uid_shift, uid_t *ret_uid_r

 int userns_acquire_empty(void);
 int userns_acquire(const char *uid_map, const char *gid_map);
+int userns_enter_and_pin(int userns_fd, pid_t *ret_pid);

 int userns_get_base_uid(int userns_fd, uid_t *ret_uid, gid_t *ret_gid);