2 files changed, 20 insertions, 0 deletions
diff --git a/src/shared/capability.c b/src/shared/capability.c
index 5d156ab3cd..65d7e038a7 100644
--- a/src/shared/capability.c
+++ b/src/shared/capability.c
@@ -271,3 +271,21 @@ int drop_privileges(uid_t uid, gid_t gid, uint64_t keep_capabilities) {
 
         return 0;
 }
+
+int drop_capability(cap_value_t cv) {
+        _cleanup_cap_free_ cap_t tmp_cap = NULL;
+
+        tmp_cap = cap_get_proc();
+        if (!tmp_cap)
+                return -errno;
+
+        if ((cap_set_flag(tmp_cap, CAP_INHERITABLE, 1, &cv, CAP_CLEAR) < 0) ||
+            (cap_set_flag(tmp_cap, CAP_PERMITTED, 1, &cv, CAP_CLEAR) < 0) ||
+            (cap_set_flag(tmp_cap, CAP_EFFECTIVE, 1, &cv, CAP_CLEAR) < 0))
+                return -errno;
+
+        if (cap_set_proc(tmp_cap) < 0)
+                return -errno;
+
+        return 0;
+}
diff --git a/src/shared/capability.h b/src/shared/capability.h
index 3e6d9995f5..6f2f6f997d 100644
--- a/src/shared/capability.h
+++ b/src/shared/capability.h
@@ -34,6 +34,8 @@ int capability_bounding_set_drop_usermode(uint64_t drop);
 
 int drop_privileges(uid_t uid, gid_t gid, uint64_t keep_capabilites);
 
+int drop_capability(cap_value_t cv);
+
 DEFINE_TRIVIAL_CLEANUP_FUNC(cap_t, cap_free);
 #define _cleanup_cap_free_ _cleanup_(cap_freep)