utmpdump: encourage users not to follow stdin

Signed-off-by: Sami Kerola <kerolasa@iki.fi>

diff --git a/login-utils/utmpdump.c b/login-utils/utmpdump.c
index 3f20f2dd3ab36be9a118b133012c3fff39b8cff2..a61dfa1a55bbfea9e2e1cd9a0f3ab3224ac7faf9 100644 (file)
--- a/login-utils/utmpdump.c
+++ b/login-utils/utmpdump.c
@@ -339,7 +339,9 @@ int main(int argc, char **argv)
                if (!fp)
                        err(EXIT_FAILURE, _("%s: open failed"), filename);
        } else {
-               filename = "stdin";
+               filename = "/dev/stdin";
+               if (forever)
+                       warnx(_("warning: following standard input indefinitely is ineffective"));
                fp = stdin;
        }