--- a/util-src/hashes.c	Sun Dec 01 23:34:49 2019 +0100
+++ b/util-src/hashes.c	Sun Dec 01 20:25:20 2019 +0100
@@ -35,8 +35,8 @@
 #define HMAC_IPAD 0x36363636
 #define HMAC_OPAD 0x5c5c5c5c
 
-const char *hex_tab = "0123456789abcdef";
-void toHex(const unsigned char *in, int length, unsigned char *out) {
+static const char *hex_tab = "0123456789abcdef";
+static void toHex(const unsigned char *in, int length, unsigned char *out) {
 	int i;
 
 	for(i = 0; i < length; i++) {

--- a/util-src/net.c	Sun Dec 01 23:34:49 2019 +0100
+++ b/util-src/net.c	Sun Dec 01 20:25:20 2019 +0100
@@ -36,7 +36,7 @@
 
 /* Enumerate all locally configured IP addresses */
 
-const char *const type_strings[] = {
+static const char *const type_strings[] = {
 	"both",
 	"ipv4",
 	"ipv6",

--- a/util-src/pposix.c	Sun Dec 01 23:34:49 2019 +0100
+++ b/util-src/pposix.c	Sun Dec 01 20:25:20 2019 +0100
@@ -137,7 +137,7 @@
 
 /* Syslog support */
 
-const char *const facility_strings[] = {
+static const char *const facility_strings[] = {
 	"auth",
 #if !(defined(sun) || defined(__sun))
 	"authpriv",
@@ -163,7 +163,7 @@
 	"uucp",
 	NULL
 };
-int facility_constants[] =	{
+static int facility_constants[] =	{
 	LOG_AUTH,
 #if !(defined(sun) || defined(__sun))
 	LOG_AUTHPRIV,
@@ -199,9 +199,9 @@
        constant.
    " -- syslog manpage
 */
-char *syslog_ident = NULL;
+static char *syslog_ident = NULL;
 
-int lc_syslog_open(lua_State *L) {
+static int lc_syslog_open(lua_State *L) {
 	int facility = luaL_checkoption(L, 2, "daemon", facility_strings);
 	facility = facility_constants[facility];
 
@@ -217,7 +217,7 @@
 	return 0;
 }
 
-const char *const level_strings[] = {
+static const char *const level_strings[] = {
 	"debug",
 	"info",
 	"notice",
@@ -225,7 +225,7 @@
 	"error",
 	NULL
 };
-int level_constants[] = 	{
+static int level_constants[] = 	{
 	LOG_DEBUG,
 	LOG_INFO,
 	LOG_NOTICE,
@@ -233,7 +233,7 @@
 	LOG_CRIT,
 	-1
 };
-int lc_syslog_log(lua_State *L) {
+static int lc_syslog_log(lua_State *L) {
 	int level = level_constants[luaL_checkoption(L, 1, "notice", level_strings)];
 
 	if(lua_gettop(L) == 3) {
@@ -245,7 +245,7 @@
 	return 0;
 }
 
-int lc_syslog_close(lua_State *L) {
+static int lc_syslog_close(lua_State *L) {
 	(void)L;
 	closelog();
 
@@ -257,7 +257,7 @@
 	return 0;
 }
 
-int lc_syslog_setmask(lua_State *L) {
+static int lc_syslog_setmask(lua_State *L) {
 	int level_idx = luaL_checkoption(L, 1, "notice", level_strings);
 	int mask = 0;
 
@@ -271,24 +271,24 @@
 
 /* getpid */
 
-int lc_getpid(lua_State *L) {
+static int lc_getpid(lua_State *L) {
 	lua_pushinteger(L, getpid());
 	return 1;
 }
 
 /* UID/GID functions */
 
-int lc_getuid(lua_State *L) {
+static int lc_getuid(lua_State *L) {
 	lua_pushinteger(L, getuid());
 	return 1;
 }
 
-int lc_getgid(lua_State *L) {
+static int lc_getgid(lua_State *L) {
 	lua_pushinteger(L, getgid());
 	return 1;
 }
 
-int lc_setuid(lua_State *L) {
+static int lc_setuid(lua_State *L) {
 	int uid = -1;
 
 	if(lua_gettop(L) < 1) {
@@ -346,7 +346,7 @@
 	return 2;
 }
 
-int lc_setgid(lua_State *L) {
+static int lc_setgid(lua_State *L) {
 	int gid = -1;
 
 	if(lua_gettop(L) < 1) {
@@ -404,7 +404,7 @@
 	return 2;
 }
 
-int lc_initgroups(lua_State *L) {
+static int lc_initgroups(lua_State *L) {
 	int ret;
 	gid_t gid;
 	struct passwd *p;
@@ -468,7 +468,7 @@
 	return 2;
 }
 
-int lc_umask(lua_State *L) {
+static int lc_umask(lua_State *L) {
 	char old_mode_string[7];
 	mode_t old_mode = umask(strtoul(luaL_checkstring(L, 1), NULL, 8));
 
@@ -479,7 +479,7 @@
 	return 1;
 }
 
-int lc_mkdir(lua_State *L) {
+static int lc_mkdir(lua_State *L) {
 	int ret = mkdir(luaL_checkstring(L, 1), S_IRUSR | S_IWUSR | S_IXUSR
 	                | S_IRGRP | S_IWGRP | S_IXGRP
 	                | S_IROTH | S_IXOTH); /* mode 775 */
@@ -504,7 +504,7 @@
  *	Example usage:
  *	pposix.setrlimit("NOFILE", 1000, 2000)
  */
-int string2resource(const char *s) {
+static int string2resource(const char *s) {
 	if(!strcmp(s, "CORE")) {
 		return RLIMIT_CORE;
 	}
@@ -554,7 +554,7 @@
 	return -1;
 }
 
-rlim_t arg_to_rlimit(lua_State *L, int idx, rlim_t current) {
+static rlim_t arg_to_rlimit(lua_State *L, int idx, rlim_t current) {
 	switch(lua_type(L, idx)) {
 		case LUA_TSTRING:
 
@@ -575,7 +575,7 @@
 	}
 }
 
-int lc_setrlimit(lua_State *L) {
+static int lc_setrlimit(lua_State *L) {
 	struct rlimit lim;
 	int arguments = lua_gettop(L);
 	int rid = -1;
@@ -614,7 +614,7 @@
 	return 1;
 }
 
-int lc_getrlimit(lua_State *L) {
+static int lc_getrlimit(lua_State *L) {
 	int arguments = lua_gettop(L);
 	const char *resource = NULL;
 	int rid = -1;
@@ -659,13 +659,13 @@
 	return 3;
 }
 
-int lc_abort(lua_State *L) {
+static int lc_abort(lua_State *L) {
 	(void)L;
 	abort();
 	return 0;
 }
 
-int lc_uname(lua_State *L) {
+static int lc_uname(lua_State *L) {
 	struct utsname uname_info;
 
 	if(uname(&uname_info) != 0) {
@@ -692,7 +692,7 @@
 	return 1;
 }
 
-int lc_setenv(lua_State *L) {
+static int lc_setenv(lua_State *L) {
 	const char *var = luaL_checkstring(L, 1);
 	const char *value;
 
@@ -721,7 +721,7 @@
 }
 
 #ifdef WITH_MALLINFO
-int lc_meminfo(lua_State *L) {
+static int lc_meminfo(lua_State *L) {
 	struct mallinfo info = mallinfo();
 	lua_createtable(L, 0, 5);
 	/* This is the total size of memory allocated with sbrk by malloc, in bytes. */
@@ -749,7 +749,7 @@
  * Attempt to allocate space first
  * Truncate to original size on failure
  */
-int lc_atomic_append(lua_State *L) {
+static int lc_atomic_append(lua_State *L) {
 	int err;
 	size_t len;
 

--- a/util-src/ringbuffer.c	Sun Dec 01 23:34:49 2019 +0100
+++ b/util-src/ringbuffer.c	Sun Dec 01 20:25:20 2019 +0100
@@ -15,23 +15,18 @@
 	char buffer[];
 } ringbuffer;
 
-char readchar(ringbuffer *b) {
-	b->blen--;
-	return b->buffer[(b->rpos++) % b->alen];
-}
-
-void writechar(ringbuffer *b, char c) {
+static void writechar(ringbuffer *b, char c) {
 	b->blen++;
 	b->buffer[(b->wpos++) % b->alen] = c;
 }
 
 /* make sure position counters stay within the allocation */
-void modpos(ringbuffer *b) {
+static void modpos(ringbuffer *b) {
 	b->rpos = b->rpos % b->alen;
 	b->wpos = b->wpos % b->alen;
 }
 
-int find(ringbuffer *b, const char *s, size_t l) {
+static int find(ringbuffer *b, const char *s, size_t l) {
 	size_t i, j;
 	int m;
 
@@ -64,7 +59,7 @@
  * Find first position of a substring in buffer
  * (buffer, string) -> number
  */
-int rb_find(lua_State *L) {
+static int rb_find(lua_State *L) {
 	size_t l, m;
 	ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
 	const char *s = luaL_checklstring(L, 2, &l);
@@ -82,7 +77,7 @@
  * Move read position forward without returning the data
  * (buffer, number) -> boolean
  */
-int rb_discard(lua_State *L) {
+static int rb_discard(lua_State *L) {
 	ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
 	size_t r = luaL_checkinteger(L, 2);
 
@@ -103,7 +98,7 @@
  * Read bytes from buffer
  * (buffer, number, boolean?) -> string
  */
-int rb_read(lua_State *L) {
+static int rb_read(lua_State *L) {
 	ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
 	size_t r = luaL_checkinteger(L, 2);
 	int peek = lua_toboolean(L, 3);
@@ -135,7 +130,7 @@
  * Read buffer until first occurrence of a substring
  * (buffer, string) -> string
  */
-int rb_readuntil(lua_State *L) {
+static int rb_readuntil(lua_State *L) {
 	size_t l, m;
 	ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
 	const char *s = luaL_checklstring(L, 2, &l);
@@ -154,7 +149,7 @@
  * Write bytes into the buffer
  * (buffer, string) -> integer
  */
-int rb_write(lua_State *L) {
+static int rb_write(lua_State *L) {
 	size_t l, w = 0;
 	ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
 	const char *s = luaL_checklstring(L, 2, &l);
@@ -177,31 +172,31 @@
 	return 1;
 }
 
-int rb_tostring(lua_State *L) {
+static int rb_tostring(lua_State *L) {
 	ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
 	lua_pushfstring(L, "ringbuffer: %p %d/%d", b, b->blen, b->alen);
 	return 1;
 }
 
-int rb_length(lua_State *L) {
+static int rb_length(lua_State *L) {
 	ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
 	lua_pushinteger(L, b->blen);
 	return 1;
 }
 
-int rb_size(lua_State *L) {
+static int rb_size(lua_State *L) {
 	ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
 	lua_pushinteger(L, b->alen);
 	return 1;
 }
 
-int rb_free(lua_State *L) {
+static int rb_free(lua_State *L) {
 	ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
 	lua_pushinteger(L, b->alen - b->blen);
 	return 1;
 }
 
-int rb_new(lua_State *L) {
+static int rb_new(lua_State *L) {
 	size_t size = luaL_optinteger(L, 1, sysconf(_SC_PAGESIZE));
 	ringbuffer *b = lua_newuserdata(L, sizeof(ringbuffer) + size);
 

--- a/util-src/signal.c	Sun Dec 01 23:34:49 2019 +0100
+++ b/util-src/signal.c	Sun Dec 01 20:25:20 2019 +0100
@@ -164,8 +164,8 @@
 static int Hmask = 0;
 static int Hcount = 0;
 
-int signals[MAX_PENDING_SIGNALS];
-int nsig = 0;
+static int signals[MAX_PENDING_SIGNALS];
+static int nsig = 0;
 
 static void sighook(lua_State *L, lua_Debug *ar) {
 	(void)ar;

--- a/util-src/time.c	Sun Dec 01 23:34:49 2019 +0100
+++ b/util-src/time.c	Sun Dec 01 20:25:20 2019 +0100
@@ -5,18 +5,18 @@
 #include <time.h>
 #include <lua.h>
 
-lua_Number tv2number(struct timespec *tv) {
+static lua_Number tv2number(struct timespec *tv) {
 	return tv->tv_sec + tv->tv_nsec * 1e-9;
 }
 
-int lc_time_realtime(lua_State *L) {
+static int lc_time_realtime(lua_State *L) {
 	struct timespec t;
 	clock_gettime(CLOCK_REALTIME, &t);
 	lua_pushnumber(L, tv2number(&t));
 	return 1;
 }
 
-int lc_time_monotonic(lua_State *L) {
+static int lc_time_monotonic(lua_State *L) {
 	struct timespec t;
 	clock_gettime(CLOCK_MONOTONIC, &t);
 	lua_pushnumber(L, tv2number(&t));