libsemanage: avoid strerror(3)

Use the %m printf modifier to format errno in a thread safe way.

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Acked-by: James Carter <jwcart2@gmail.com>

libsemanage/src/debug.c

@@ -79,8 +79,10 @@ void semanage_msg_default_handler(void *varg __attribute__ ((unused)),
 	vfprintf(stream, fmt, ap);
 	va_end(ap);
 
-	if (errsv && errsv != ENOMEM)
-		fprintf(stream, " (%s).", strerror(errsv));
+	if (errsv && errsv != ENOMEM) {
+		errno = errsv;
+		fprintf(stream, " (%m).");
+	}
 
 	fprintf(stream, "\n");
 }

libsemanage/src/semanage_store.c

@@ -739,8 +739,8 @@ static int semanage_rename(semanage_handle_t * sh, const char *src, const char *
 		return retval;
 
 	/* we can't use rename() due to filesystem limitation, lets try to copy files manually */
-	WARN(sh, "WARNING: rename(%s, %s) failed: %s, fall back to non-atomic semanage_copy_dir_flags()",
-		 src, dst, strerror(errno));
+	WARN(sh, "WARNING: rename(%s, %s) failed: %m, fall back to non-atomic semanage_copy_dir_flags()",
+		 src, dst);
 	if (semanage_copy_dir_flags(src, dst, 1) == -1) {
 		return -1;
 	}