Add __attribute__((const, pure, format)) in various places

I'm assuming that it's fine if a _const_ or _pure_ function
calls assert. It is assumed that the assert won't trigger,
and even if it does, it can only trigger on the first call
with a given set of parameters, and we don't care if the
compiler moves the order of calls.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/shared/utmp-wtmp.c b/src/shared/utmp-wtmp.c
index 342e0a9cf1..5d88405e13 100644
--- a/src/shared/utmp-wtmp.c
+++ b/src/shared/utmp-wtmp.c
@@ -190,7 +190,7 @@ int utmp_put_reboot(usec_t t) {
         return write_entry_both(&store);
 }
 
-static const char *sanitize_id(const char *id) {
+_pure_ static const char *sanitize_id(const char *id) {
         size_t l;
 
         assert(id);