pam_start.c: call bindtextdomain() to expose Linux-PAM locales

Without the change locales are not visible to applications using PAM if
PAM library is installed into a --prefix= different from the default
one.

1 files changed, 15 insertions, 0 deletions

diff --git a/libpam/pam_start.c b/libpam/pam_start.c
index 5e9b0948..c32ce61c 100644
--- a/libpam/pam_start.c
+++ b/libpam/pam_start.c
@@ -25,6 +25,21 @@ static int _pam_start_internal (
     D(("called pam_start: [%s] [%s] [%p] [%p]"
        ,service_name, user, pam_conversation, pamh));
 
+#ifdef HAVE_BINDTEXTDOMAIN
+    /* Bind text domain to pull in PAM translations for a case where
+       linux-pam is installed to non-default prefix.
+
+       It is safe to call bindtextdomain() from multiple threads, but it
+       has a chance to have some overhead. Let's try to do it once (or a
+       small number of times as `bound_text_domain` is not protected by
+       a lock. */
+    static int bound_text_domain = 0;
+    if (!bound_text_domain) {
+	bound_text_domain = 1;
+	bindtextdomain(PACKAGE, LOCALEDIR);
+    }
+#endif
+
     if (pamh == NULL) {
 	pam_syslog(NULL, LOG_CRIT,
 		   "pam_start: invalid argument: pamh == NULL");