Add strnlen() replacement needed for glob.c.

Only used if no glob() and no strnlen().

MANIFEST

@@ -159,6 +159,7 @@ lib/util/siglist.in
 lib/util/snprintf.c
 lib/util/strlcat.c
 lib/util/strlcpy.c
+lib/util/strnlen.c
 lib/util/strsignal.c
 lib/util/strtobool.c
 lib/util/strtoid.c

config.h.in

@@ -662,6 +662,9 @@
 /* Define to 1 if you have the `strlcpy' function. */
 #undef HAVE_STRLCPY
 
+/* Define to 1 if you have the `strnlen' function. */
+#undef HAVE_STRNLEN
+
 /* Define to 1 if you have the `strsignal' function. */
 #undef HAVE_STRSIGNAL
 

configure

@@ -18930,6 +18930,32 @@ esac
 "
     done
 
+    for ac_func in strnlen
+do :
+  ac_fn_c_check_func "$LINENO" "strnlen" "ac_cv_func_strnlen"
+if test "x$ac_cv_func_strnlen" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_STRNLEN 1
+_ACEOF
+
+else
+
+	case " $LIBOBJS " in
+  *" strnlen.$ac_objext "* ) ;;
+  *) LIBOBJS="$LIBOBJS strnlen.$ac_objext"
+ ;;
+esac
+
+
+    for _sym in sudo_strnlen; do
+	COMPAT_EXP="${COMPAT_EXP}${_sym}
+"
+    done
+
+
+fi
+done
+
 
 fi
 done

configure.ac

@@ -2574,6 +2574,10 @@ SUDO_FUNC_ISBLANK
 AC_CHECK_FUNCS([glob], [], [
     AC_LIBOBJ(glob)
     SUDO_APPEND_COMPAT_EXP(sudo_glob sudo_globfree)
+    AC_CHECK_FUNCS([strnlen], [], [
+	AC_LIBOBJ(strnlen)
+	SUDO_APPEND_COMPAT_EXP(sudo_strnlen)
+    ])
 ])
 AC_CHECK_FUNCS([memrchr], [], [
     AC_LIBOBJ(memrchr)

include/sudo_compat.h

@@ -431,6 +431,11 @@ __dso_public size_t sudo_strlcpy(char *dst, const char *src, size_t siz);
 # undef strlcpy
 # define strlcpy(_a, _b, _c) sudo_strlcpy((_a), (_b), (_c))
 #endif /* HAVE_STRLCPY */
+#if !defined(HAVE_GLOB) && !defined(HAVE_STRNLEN)
+__dso_public size_t sudo_strnlen(char *str, size_t maxlen);
+# undef strnlen
+# define strnlen(_a, _b) sudo_strnlen((_a), (_b))
+#endif /* !HAVE_GLOB && !HAVE_STRNLEN */
 #ifndef HAVE_MEMRCHR
 __dso_public void *sudo_memrchr(const void *s, int c, size_t n);
 # undef memrchr

lib/util/strnlen.c

@@ -0,0 +1,36 @@
+/*	$OpenBSD: strnlen.c,v 1.5 2014/06/10 04:17:37 deraadt Exp $	*/
+
+/*
+ * Copyright (c) 2010 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <config.h>
+
+#ifndef HAVE_STRNLEN
+
+#include <sys/types.h>
+
+size_t
+strnlen(const char *str, size_t maxlen)
+{
+	const char *cp;
+
+	for (cp = str; maxlen != 0 && *cp != '\0'; cp++, maxlen--)
+		;
+
+	return (size_t)(cp - str);
+}
+
+#endif /* HAVE_STRNLEN */