diff --git a/manual/luatex-lua.tex b/manual/luatex-lua.tex
index 94dead9e14c0cc4c4c7354188a4367ee01220069..6ae556233d00d6379184151feae6c706a361418a 100644
--- a/manual/luatex-lua.tex
+++ b/manual/luatex-lua.tex
@@ -169,7 +169,8 @@ in the following order:
     \starttabulate[|c|l|]
         \DB library     \BC functions \NC \NR
         \TB
-        \NC \type {os}  \NC \type {execute} \type {exec} \type {spawn} \type {setenv}
+        \NC \type {os}  \NC \type {execute} \type {exec} \type{kpsepopen}
+                            \type {spawn} \type {setenv}
                             \type {rename} \type {remove} \type {tmpdir} \NC \NR
         \NC \type {io}  \NC \type {popen} \type {output} \type {tmpfile} \NC \NR
         \NC \type {lfs} \NC \type {rmdir} \type {mkdir} \type {chdir} \type {lock}
@@ -198,8 +199,8 @@ in the following order:
 
     The switches \type {--[no-]shell-escape}, \type {--[enable|disable]-write18}, and
     \type {--shell-restricted} have the same effects as in \PDFTEX, and additionally
-    make \type {io.popen()}, \type {os.execute}, \type {os.exec} and \type {os.spawn}
-    adhere to the requested option.
+    make \type {io.popen()}, \type {os.execute}, \type {os.exec}, \type {os.kpsepopen}
+    and \type {os.spawn} adhere to the requested option.
 \stopitem
 
 \startitem
@@ -319,8 +320,8 @@ of the module itself).
 
 \startsubsection[title={Executing programs}]
 
-In keeping with the other \TEX|-|like programs in \TEXLIVE, the two \LUA\ functions
-\type {os.execute} and \type {io.popen}, as well as the two new functions \type
+In keeping with the other \TEX|-|like programs in \TEXLIVE, the \LUA\ functions
+\type {os.execute}, \type{os.kpsepopen} and \type {io.popen}, as well as the two new functions \type
 {os.exec} and \type {os.spawn} that are explained below, take the value of \type
 {shell_escape} and|/|or \type {shell_escape_commands} in account. Whenever
 \LUATEX\ is run with the assumed intention to typeset a document (and by that we
@@ -432,11 +433,12 @@ used as building blocks for other helpers.
 
 \startsubsection[title={Extra \type {os} library functions}]
 
-The \type {os} library has a few extra functions and variables: \libidx {os}
-{selfdir}, \libidx {os} {exec}, \libidx {os} {spawn}, \libidx {os} {setenv},
+The \type {os} library has a few extra functions and
+variables: \libidx {os} {selfdir}, \libidx {os} {exec}, \libidx {os}
+{kpsepopen}, \libidx {os} {spawn}, \libidx {os} {setenv},
 \libidx {os} {env}, \libidx {os} {gettimeofday}, \libidx {os} {times}, \libidx
-{os} {tmpdir}, \libidx {os} {type}, \libidx {os} {name} and \libidx {os} {uname},
-that we will discuss here.
+{os} {tmpdir}, \libidx {os} {type}, \libidx {os} {name} and \libidx
+{os} {uname}, that we will discuss here.
 
 \startitemize
 
@@ -495,6 +497,14 @@ that we will discuss here.
     \TEXLUA.
 \stopitem
 
+\startitem
+    \type {os.kpsepopen(commandline,[opt])} is similar to \type {io.popen}
+    but with a preliminary check of the  command  by mean of \type{kpse.check_permission}.
+    
+    If the command ran ok, then the return value is the same of \type{io.popen};
+    otherwise it will return the two values \type {nil} and \type {error}.
+\stopitem
+
 \startitem
     \type {os.spawn(commandline)} is a returning version of \type {os.exec},
     with otherwise identical calling conventions.
diff --git a/manual/luatex-tex.tex b/manual/luatex-tex.tex
index 8bf070bfac16976227133ba7b4fb1cc5327c3e76..4752c251576dd54d8e3d2f23ed425f372336f69d 100644
--- a/manual/luatex-tex.tex
+++ b/manual/luatex-tex.tex
@@ -2854,6 +2854,21 @@ Returns the kpathsea version string.
 
 \stopsubsection
 
+\startsubsection[title={\type {check_permission}}]
+
+\libindex{check\_permission}
+
+Checks if the \type{filename} can be executed or not.
+Returns \type{1}, \type{filename} or a safe cmd alternative  if it can be executed,
+otherwise  returns \type{0} and an error message. 
+
+\startfunctioncall
+<string> res, cmd = kpse.check_permission(filename)
+\stopfunctioncall
+
+\stopsubsection
+
+
 \stopsection
 
 \stopchapter
diff --git a/manual/luatex.pdf b/manual/luatex.pdf
index ffa3f2144e7f2c086abe2e5b074d80581429a2af..0ca85014b9bdd171b9675c50ae288392cf7ff4e1 100644
Binary files a/manual/luatex.pdf and b/manual/luatex.pdf differ
diff --git a/source/texk/web2c/luatexdir/ChangeLog b/source/texk/web2c/luatexdir/ChangeLog
index 27fbebcbb099876b109b7fa9a0e39f1c01b7ce61..06b6b2ebedaf43a0d85ed61ee5f9b9298042419e 100644
--- a/source/texk/web2c/luatexdir/ChangeLog
+++ b/source/texk/web2c/luatexdir/ChangeLog
@@ -1,3 +1,11 @@
+2023-04-25  Luigi Scarso <luigi.scarso@gmail.com> 
+    * new os.kpsepopen -- replace  io.popen if kpse is active.
+    * Luatex 1.16.2
+
+2023-04-18  Luigi Scarso <luigi.scarso@gmail.com> 
+    * lua.setluaname(n, s) and lua.getluaname(n): 
+      fixed mismatch between documentation and implementation (J. Friedrich).
+
 2023-03-30  Luigi Scarso <luigi.scarso@gmail.com> 
     * bugfix for setpdforigin()  (A. Matthias) 
 
diff --git a/source/texk/web2c/luatexdir/lua/loslibext.c b/source/texk/web2c/luatexdir/lua/loslibext.c
index 2e6befc2da2a1e8de70d3923ce64bd281995b06c..d4c7984917e2c96b3c1032882e7c1e3a642a6554 100644
--- a/source/texk/web2c/luatexdir/lua/loslibext.c
+++ b/source/texk/web2c/luatexdir/lua/loslibext.c
@@ -1047,6 +1047,82 @@ static int os_execute(lua_State * L)
 }
 
 
+/*
+** ======================================================
+** l_kpse_popen spawns a new process connected to the current
+** one through the file streams with some checks by kpse.
+** Almost verbatim from Lua liolib.c .
+** =======================================================
+*/
+#if !defined(l_kpse_popen)           /* { */
+
+#if defined(LUA_USE_POSIX)      /* { */
+
+#define l_kpse_popen(L,c,m)          (fflush(NULL), popen(c,m))
+#define l_kpse_pclose(L,file)        (pclose(file))
+
+#elif defined(LUA_USE_WINDOWS)  /* }{ */
+
+#define l_kpse_popen(L,c,m)          (_popen(c,m))
+#define l_kpse_pclose(L,file)        (_pclose(file))
+
+#else                           /* }{ */
+
+/* ISO C definitions */
+#define l_kpse_popen(L,c,m)  \
+          ((void)((void)c, m), \
+          luaL_error(L, "'popen' not supported"), \
+          (FILE*)0)
+#define l_kpse_pclose(L,file)                ((void)L, (void)file, -1)
+
+#endif                          /* } */
+
+#endif                          /* } */
+typedef luaL_Stream LStream;
+#define tolstream(L)    ((LStream *)luaL_checkudata(L, 1, LUA_FILEHANDLE))
+static LStream *newprefile (lua_State *L) {
+  LStream *p = (LStream *)lua_newuserdata(L, sizeof(LStream));
+  p->closef = NULL;  /* mark file handle as 'closed' */
+  luaL_setmetatable(L, LUA_FILEHANDLE);
+  return p;
+}
+static int io_kpse_pclose (lua_State *L) {
+  LStream *p = tolstream(L);
+  return luaL_execresult(L, l_kpse_pclose(L, p->f));
+}
+static int io_kpse_popen (lua_State *L) {
+  const char *filename = NULL;
+  const char *mode = NULL;
+  LStream *p = NULL;
+  filename = luaL_checkstring(L, 1);
+  mode = luaL_optstring(L, 2, "r");
+  /* Check filename with kpse.check_permission . */
+  lua_getglobal(L,"kpse");
+  lua_getfield(L, -1, "check_permission");
+  lua_pushstring(L,filename);
+  if (lua_pcall(L,1,2,0)!=LUA_OK){
+    return 1 ;
+  } else {
+    filename = luaL_checkstring(L, -1);
+    int okay = lua_toboolean(L,-2);
+    if (okay && filename) {
+      p = newprefile(L);
+      luaL_argcheck(L, ((mode[0] == 'r' || mode[0] == 'w') && mode[1] == '\0'),
+                   2, "invalid mode");
+      p->f = l_kpse_popen(L, filename, mode);
+      p->closef = &io_kpse_pclose;
+      return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
+   } else {
+      lua_pushnil(L);
+      lua_pushvalue(L,-2);
+      return 2;
+   }
+  }
+}
+
+
+
+
 void open_oslibext(lua_State * L)
 {
 
@@ -1080,6 +1156,8 @@ void open_oslibext(lua_State * L)
     lua_setfield(L, -2, "execute");
     lua_pushcfunction(L, os_tmpdir);
     lua_setfield(L, -2, "tmpdir");
+    lua_pushcfunction(L, io_kpse_popen);
+    lua_setfield(L, -2, "kpsepopen");
 
     lua_pop(L, 1);              /* pop the table */
 }
diff --git a/source/texk/web2c/luatexdir/lua/luatex-core.c b/source/texk/web2c/luatexdir/lua/luatex-core.c
index c9c4d941b197b731cd6e9a1803fb2315683d3ca0..d912bf4a5a2c64dcae8faf00d1eac2d911d45b65 100644
--- a/source/texk/web2c/luatexdir/lua/luatex-core.c
+++ b/source/texk/web2c/luatexdir/lua/luatex-core.c
@@ -27,7 +27,7 @@ int load_luatex_core_lua (lua_State * L)
     0x20, 0x44, 0x65, 0x76, 0x65, 0x6c, 0x6f, 0x70, 0x6d, 0x65, 0x6e, 0x74, 0x20, 0x54, 0x65, 0x61,
     0x6d, 0x27, 0x2c, 0x0a, 0x2d, 0x2d, 0x20, 0x7d, 0x0a, 0x0a, 0x4c, 0x55, 0x41, 0x54, 0x45, 0x58,
     0x43, 0x4f, 0x52, 0x45, 0x56, 0x45, 0x52, 0x53, 0x49, 0x4f, 0x4e, 0x20, 0x3d, 0x20, 0x31, 0x2e,
-    0x31, 0x35, 0x31, 0x20, 0x2d, 0x2d, 0x20, 0x77, 0x65, 0x20, 0x72, 0x65, 0x66, 0x6c, 0x65, 0x63,
+    0x31, 0x36, 0x31, 0x20, 0x2d, 0x2d, 0x20, 0x77, 0x65, 0x20, 0x72, 0x65, 0x66, 0x6c, 0x65, 0x63,
     0x74, 0x20, 0x74, 0x68, 0x65, 0x20, 0x6c, 0x75, 0x61, 0x74, 0x65, 0x78, 0x20, 0x76, 0x65, 0x72,
     0x73, 0x69, 0x6f, 0x6e, 0x20, 0x77, 0x68, 0x65, 0x72, 0x65, 0x20, 0x63, 0x68, 0x61, 0x6e, 0x67,
     0x65, 0x73, 0x20, 0x68, 0x61, 0x70, 0x70, 0x65, 0x6e, 0x65, 0x64, 0x0a, 0x0a, 0x2d, 0x2d, 0x20,
@@ -53,632 +53,645 @@ int load_luatex_core_lua (lua_State * L)
     0x76, 0x65, 0x72, 0x6c, 0x6f, 0x61, 0x64, 0x20, 0x6f, 0x6e, 0x65, 0x73, 0x20, 0x74, 0x68, 0x61,
     0x74, 0x0a, 0x2d, 0x2d, 0x20, 0x61, 0x72, 0x65, 0x20, 0x70, 0x72, 0x6f, 0x76, 0x69, 0x64, 0x65,
     0x64, 0x20, 0x69, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x73, 0x74, 0x61, 0x72, 0x74, 0x75, 0x70,
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+    0x65, 0x6e, 0x64, 0x0a, 0x0a, 0x00
   };
   return luaL_dostring(L, (const char*) luatex_core_lua);
 }
\ No newline at end of file
diff --git a/source/texk/web2c/luatexdir/lua/luatex-core.lua b/source/texk/web2c/luatexdir/lua/luatex-core.lua
index 12941dbe7eb2312b422783d2e014698245146ab0..d33c1217980f54176318cf54158ca57a4c76d44d 100644
--- a/source/texk/web2c/luatexdir/lua/luatex-core.lua
+++ b/source/texk/web2c/luatexdir/lua/luatex-core.lua
@@ -7,7 +7,7 @@
 --     copyright = 'LuaTeX Development Team',
 -- }
 
-LUATEXCOREVERSION = 1.151 -- we reflect the luatex version where changes happened
+LUATEXCOREVERSION = 1.161 -- we reflect the luatex version where changes happened
 
 -- This file overloads some Lua functions. The readline variants provide the same
 -- functionality as LuaTeX <= 1.04 and doing it this way permits us to keep the
@@ -16,6 +16,8 @@ LUATEXCOREVERSION = 1.151 -- we reflect the luatex version where changes happene
 -- We test for functions already being defined so that we don't overload ones that
 -- are provided in the startup script.
 
+
+
 local saferoption = status.safer_option
 local shellescape = status.shell_escape -- 0 (disabled) 1 (anything) 2 (restricted)
 local kpseused    = status.kpse_used    -- 0 1
@@ -34,7 +36,7 @@ if kpseused == 1 then
     local kpse_recordoutputfile = kpse.record_output_file
 
     local io_open               = io.open
-    local io_popen              = io.popen
+    -- local io_popen              = io.popen -- not need, we  use os.kpsepopen
     local io_lines              = io.lines
 
     local fio_readline          = fio.readline
@@ -75,12 +77,13 @@ if kpseused == 1 then
         return f
     end
 
-    local function luatex_io_popen(name,...)
-        local okay, found = kpse_checkpermission(name)
-        if okay and found then
-            return io_popen(found,...)
-        end
-    end
+    --  not need, we  use os.kpsepopen 
+    --local function luatex_io_popen(name,...)
+    --    local okay, found = kpse_checkpermission(name)
+    --    if okay and found then
+    --        return io_popen(found,...)
+    --    end
+    --end
 
     -- local function luatex_io_lines(name,how)
     --     if name then
@@ -130,7 +133,8 @@ if kpseused == 1 then
     mt.lines = luatex_io_readline
 
     io.open  = luatex_io_open
-    io.popen = luatex_io_popen
+    --io.popen = luatex_io_popen -- not need, we  use os.kpsepopen
+    io.popen = os.kpsepopen
 
 else
 
@@ -169,6 +173,8 @@ if saferoption == 1 then
     os.setenv  = installdummy("os.setenv")
     os.tempdir = installdummy("os.tempdir")
 
+    os.kpsepopen = installdummy("os.kpsepopen")
+
     io.popen   = installdummy("io.popen")
     io.open    = installdummy("io.open",luatex_io_open_readonly)
 
diff --git a/source/texk/web2c/luatexdir/luatex.c b/source/texk/web2c/luatexdir/luatex.c
index 40eaa2a116fbe77d6c1d1ca1a57e65d10e20a432..1df416a9baf69975455c7b29f2a63b1a4e9b7651 100644
--- a/source/texk/web2c/luatexdir/luatex.c
+++ b/source/texk/web2c/luatexdir/luatex.c
@@ -33,8 +33,8 @@
 */
 
 int luatex_version = 116;
-int luatex_revision = '1';
-const char *luatex_version_string = "1.16.1";
+int luatex_revision = '2';
+const char *luatex_version_string = "1.16.2";
 const char *engine_name = my_name;
 
 #include <kpathsea/c-ctype.h>
diff --git a/source/texk/web2c/luatexdir/luatex_svnversion.h b/source/texk/web2c/luatexdir/luatex_svnversion.h
index c6d0fae9fc920cf90c929a6d26597c829f277ead..3f809ec866367efe82583c96e052b347e76664d9 100644
--- a/source/texk/web2c/luatexdir/luatex_svnversion.h
+++ b/source/texk/web2c/luatexdir/luatex_svnversion.h
@@ -1,4 +1,4 @@
 #ifndef luatex_svn_revision_h
 #define luatex_svn_revision_h
-#define luatex_svn_revision 7574
+#define luatex_svn_revision 7575
 #endif