add strsep fallback for libtls

configure.ac

@@ -196,7 +196,7 @@ LDFLAGS="$LDFLAGS $CLANG_FLAGS"
 
 AC_CHECK_FUNCS([arc4random_buf asprintf explicit_bzero funopen getauxval])
 AC_CHECK_FUNCS([getentropy issetugid memmem poll reallocarray])
-AC_CHECK_FUNCS([strlcat strlcpy strndup strnlen strtonum])
+AC_CHECK_FUNCS([strlcat strlcpy strndup strnlen strsep strtonum])
 AC_CHECK_FUNCS([symlink openat])
 AC_CHECK_FUNCS([timingsafe_bcmp timingsafe_memcmp])
 
@@ -213,6 +213,7 @@ AM_CONDITIONAL([HAVE_STRLCAT], [test "x$ac_cv_func_strlcat" = xyes])
 AM_CONDITIONAL([HAVE_STRLCPY], [test "x$ac_cv_func_strlcpy" = xyes])
 AM_CONDITIONAL([HAVE_STRNDUP], [test "x$ac_cv_func_strndup" = xyes])
 AM_CONDITIONAL([HAVE_STRNLEN], [test "x$ac_cv_func_strnlen" = xyes])
+AM_CONDITIONAL([HAVE_STRSEP], [test "x$ac_cv_func_strsep" = xyes])
 AM_CONDITIONAL([HAVE_STRTONUM], [test "x$ac_cv_func_strtonum" = xyes])
 AM_CONDITIONAL([HAVE_TIMINGSAFE_BCMP], [test "x$ac_cv_func_timingsafe_bcmp" = xyes])
 AM_CONDITIONAL([HAVE_TIMINGSAFE_MEMCMP], [test "x$ac_cv_func_timingsafe_memcmp" = xyes])

include/string.h

@@ -33,6 +33,10 @@ size_t strnlen(const char *str, size_t maxlen);
 #endif
 #endif
 
+#ifndef HAVE_STRSEP
+char *strsep(char **stringp, const char *delim);
+#endif
+
 #ifndef HAVE_EXPLICIT_BZERO
 void explicit_bzero(void *, size_t);
 #endif

tls/Makefile.am

@@ -16,4 +16,9 @@ libtls_la_SOURCES += tls_server.c
 libtls_la_SOURCES += tls_util.c
 libtls_la_SOURCES += tls_verify.c
 noinst_HEADERS = tls_internal.h
+
+if !HAVE_STRSEP
+libtls_la_SOURCES += strsep.c
+endif
+
 endif

update.sh

@@ -168,7 +168,11 @@ done
 echo copying libtls source
 rm -f tls/*.c tls/*.h
 for i in `awk '/SOURCES|HEADERS/ { print $3 }' tls/Makefile.am` ; do
-	$CP $libtls_src/$i tls
+	if [ -e $libtls_src/$i ]; then
+		$CP $libtls_src/$i tls
+	else
+		$CP $libc_src/string/$i tls
+	fi
 done
 
 # copy openssl(1) source