correct the paranoia check

1 files changed, 10 insertions, 7 deletions

diff --git a/src/lib/libc/net/gethostnamadr.c b/src/lib/libc/net/gethostnamadr.c
index 7ce0f9c3bd..95e00484d6 100644
--- a/src/lib/libc/net/gethostnamadr.c
+++ b/src/lib/libc/net/gethostnamadr.c
@@ -52,7 +52,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$OpenBSD: gethostnamadr.c,v 1.21 1997/04/14 06:57:44 deraadt Exp $";
+static char rcsid[] = "$OpenBSD: gethostnamadr.c,v 1.22 1997/04/15 11:27:56 deraadt Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/param.h>
@@ -140,15 +140,18 @@ _hokchar(p)
          * characters are a-z, A-Z, 0-9, '-' and . But the others
          * tested for below can happen, and we must be more permissive
          * than the resolver until those idiots clean up their act.
+         * We let '/' through, but not '..'
          */
         while ((c = *p++)) {
-                if (('a' >= c && c <= 'z') ||
-                    ('A' >= c && c <= 'Z') ||
-                    ('0' >= c && c <= '9'))
+                if (('a' <= c && c <= 'z') ||
+                    ('A' <= c && c <= 'Z') ||
+                    ('0' <= c && c <= '9'))
                         continue;
-                if (strchr("-_/.[]\\", c) ||
-                    (c == '.' && p[1] == '.'))
-                        return 0;
+                if (strchr("-_/", c))
+                        continue;
+                if (c == '.' && *p != '.')
+                        continue;
+                return 0;
         }
         return 1;
 }