catopen: set errno to EOPNOTSUPP

Per 1003.1-2008 (2016 ed.), catopen must set errno on failure.

We set errno to EOPNOTSUPP because musl does not currently support
message catalogues.

diff --git a/src/locale/catopen.c b/src/locale/catopen.c
index 4423c4d..3fbc771 100644 (file)
--- a/src/locale/catopen.c
+++ b/src/locale/catopen.c
@@ -1,6 +1,8 @@
 #include <nl_types.h>
+#include <errno.h>
 
 nl_catd catopen (const char *name, int oflag)
 {
+       errno = EOPNOTSUPP;
        return (nl_catd)-1;
 }