who -r: don't print "last=" when the corresponding byte is unprintable

* src/who.c (print_runlevel): Print last=%c only when the "preceding
run-level" byte is printable.  Reported by Gian Piero De Lolliis in
<http://bugzilla.redhat.com/453249>.

diff --git a/src/who.c b/src/who.c
index 5529618d983ce2ef2b8e62f1211af8d3f737ecfd..0bba912751ec5fd07df28eddd2cb1f0279cad3f8 100644 (file)
--- a/src/who.c
+++ b/src/who.c
@@ -30,6 +30,7 @@
 #include <sys/types.h>
 #include "system.h"
 
 #include <sys/types.h>
 #include "system.h"
 

+#include "c-ctype.h"

 #include "canon-host.h"
 #include "readutmp.h"
 #include "error.h"
 #include "canon-host.h"
 #include "readutmp.h"
 #include "error.h"


@@ -511,7 +512,7 @@ print_runlevel (const STRUCT_UTMP *utmp_ent)
   sprintf (comment, "%s%c", _("last="), (last == 'N') ? 'S' : last);
 
   print_line (-1, "", ' ', -1, runlevline, time_string (utmp_ent),
   sprintf (comment, "%s%c", _("last="), (last == 'N') ? 'S' : last);
 
   print_line (-1, "", ' ', -1, runlevline, time_string (utmp_ent),

-             "", "", comment, "");
+             "", "", c_isprint (last) ? comment : "", "");

 
   return;
 }
 
   return;
 }