nscd: fall back gracefully on kernels without AF_UNIX support

diff --git a/src/passwd/nscd_query.c b/src/passwd/nscd_query.c
index d38e371..dc3406b 100644 (file)
--- a/src/passwd/nscd_query.c
+++ b/src/passwd/nscd_query.c
@@ -40,7 +40,15 @@ retry:
        buf[0] = NSCDVERSION;
 
        fd = socket(PF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
-       if (fd < 0) return NULL;
+       if (fd < 0) {
+               if (errno == EAFNOSUPPORT) {
+                       f = fopen("/dev/null", "re");
+                       if (f)
+                               errno = errno_save;
+                       return f;
+               }
+               return 0;
+       }
 
        if(!(f = fdopen(fd, "r"))) {
                close(fd);