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+/************************************************************************
+
+ Copyright:
+
+ Public Domain
+ Originally written in 2010 by Tomasz M. Trzeciak and Hans Hagen
+
+ This program is derived from the 'runscript' program originally
+ written in 2009 by T.M. Trzeciak. It has been adapted for use in
+ ConTeXt MkIV.
+
+ Comment:
+
+ In ConTeXt MkIV we have two core scripts: luatools.lua and
+ mtxrun.lua where the second one is used to launch other scripts.
+ Normally a user will use a call like:
+
+ mtxrun --script font --reload
+
+ Here mtxrun is a lua script. In order to avoid the usage of a cmd
+ file on windows this runner will start texlua directly. If the
+ shared library luatex.dll is available, texlua will be started in
+ the same process avoiding thus any additional overhead. Otherwise
+ it will be spawned in a new proces.
+
+ We also don't want to use other runners, like those that use kpse
+ to locate the script as this is exactly what mtxrun itself is doing
+ already. Therefore the runscript program is adapted to a more direct
+ approach suitable for mtxrun.
+
+ Compilation:
+
+ with gcc (size optimized):
+
+ gcc -Os -s -shared -o mtxrun.dll mtxrun_dll.c
+ gcc -Os -s -o mtxrun.exe mtxrun_exe.c -L./ -lmtxrun
+
+ with tcc (extra small size):
+
+ tcc -shared -o mtxrun.dll mtxrun_dll.c
+ tcc -o mtxrun.exe mtxrun_exe.c mtxrun.def
+
+************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <windows.h>
+
+//#define STATIC
+#define IS_WHITESPACE(c) ((c == ' ') || (c == '\t'))
+#define MAX_CMD 32768
+#define DIE(...) { \
+ fprintf( stderr, "mtxrun: " ); \
+ fprintf( stderr, __VA_ARGS__ ); \
+ return 1; \
+}
+
+char texlua_name[] = "texlua"; // just a bare name, luatex strips the rest anyway
+static char cmdline[MAX_CMD];
+static char dirpath[MAX_PATH];
+static char progname[MAX_PATH];
+static char scriptpath[MAX_PATH];
+static char luatexpath[MAX_PATH];
+HMODULE dllluatex = NULL;
+typedef int ( *mainlikeproc )( int, char ** );
+
+#ifdef STATIC
+int main( int argc, char *argv[] )
+#else
+__declspec(dllexport) int dllrunscript( int argc, char *argv[] )
+#endif
+{
+ char *s, *luatexfname, *argstr, **lua_argv;
+ int k, quoted, lua_argc;
+ int passprogname = 0;
+
+ // directory of this module/executable
+
+ HMODULE module_handle = GetModuleHandle( "mtxrun.dll" );
+ // if ( module_handle == NULL ) exe path will be used, which is OK too
+ k = (int) GetModuleFileName( module_handle, dirpath, MAX_PATH );
+ if ( !k || ( k == MAX_PATH ) )
+ DIE( "unable to determine a valid module name\n" );
+ s = strrchr(dirpath, '\\');
+ if ( s == NULL ) DIE( "no directory part in module path: %s\n", dirpath );
+ *(++s) = '\0'; //remove file name, leave trailing backslash
+
+ // program name
+
+ k = strlen(argv[0]);
+ while ( k && (argv[0][k-1] != '/') && (argv[0][k-1] != '\\') ) k--;
+ strcpy(progname, &argv[0][k]);
+ s = progname;
+ if ( s = strrchr(s, '.') ) *s = '\0'; // remove file extension part
+
+ // script path
+
+ strcpy( scriptpath, dirpath );
+ k = strlen(progname);
+ if ( k < 6 ) k = 6; // in case the program name is shorter than "mtxrun"
+ if ( strlen(dirpath) + k + 4 >= MAX_PATH )
+ DIE( "path too long: %s%s\n", dirpath, progname );
+ if ( ( strcmpi(progname,"mtxrun") == 0 ) || ( strcmpi(progname,"luatools") == 0 ) ) {
+ strcat( scriptpath, progname );
+ strcat( scriptpath, ".lua" );
+ } else {
+ strcat( scriptpath, "mtxrun.lua" );
+ if ( strcmpi(progname,"texmfstart") != 0 ) passprogname = 1;
+ }
+ if ( GetFileAttributes(scriptpath) == INVALID_FILE_ATTRIBUTES )
+ DIE( "file not found: %s\n", scriptpath );
+
+ // find texlua.exe
+
+ if ( !SearchPath(
+ getenv( "PATH" ), // path to search (optional)
+ "texlua.exe", // file name to search
+ NULL, // file extension to add (optional)
+ MAX_PATH, // output buffer size
+ luatexpath, // output buffer pointer
+ &luatexfname ) // pointer to a file part in the output buffer (optional)
+ ) DIE( "unable to locate texlua.exe on the search path" );
+
+ // link directly with luatex.dll if available in texlua's dir
+
+ strcpy( luatexfname, "luatex.dll" );
+ if ( dllluatex = LoadLibrary(luatexpath) )
+ {
+ mainlikeproc dllluatexmain = (mainlikeproc) GetProcAddress( dllluatex, "dllluatexmain" );
+ if ( dllluatexmain == NULL )
+ DIE( "unable to locate dllluatexmain procedure in luatex.dll" );
+
+ // set up argument list for texlua script
+
+ lua_argv = (char **)malloc( (argc + 4) * sizeof(char *) );
+ if ( lua_argv == NULL ) DIE( "out of memory\n" );
+ lua_argv[lua_argc=0] = texlua_name;
+ lua_argv[++lua_argc] = scriptpath; // script to execute
+ if (passprogname) {
+ lua_argv[++lua_argc] = "--script";
+ lua_argv[++lua_argc] = progname;
+ }
+ for ( k = 1; k < argc; k++ ) lua_argv[++lua_argc] = argv[k];
+ lua_argv[++lua_argc] = NULL;
+
+ // call texlua interpreter
+ // dllluatexmain never returns, but we pretend that it does
+
+ k = dllluatexmain( lua_argc, lua_argv );
+ if (lua_argv) free( lua_argv );
+ return k;
+ }
+
+ // we are still here, so no luatex.dll; spawn texlua.exe instead
+
+ strcpy( luatexfname, "texlua.exe" );
+ strcpy( cmdline, "\"" );
+ strcat( cmdline, luatexpath );
+ strcat( cmdline, "\" \"" );
+ strcat( cmdline, scriptpath );
+ strcat( cmdline, "\"" );
+ if (passprogname) {
+ strcat( cmdline, " --script " );
+ strcat( cmdline, progname );
+ }
+
+ argstr = GetCommandLine(); // get the command line of this process
+ if ( argstr == NULL ) DIE( "unable to retrieve the command line string\n" );
+
+ // skip over argv[0] in the argument string
+ // (it can contain embedded double quotes if launched from cmd.exe!)
+
+ for ( quoted = 0; (*argstr) && ( !IS_WHITESPACE(*argstr) || quoted ); argstr++ )
+ if (*argstr == '"') quoted = !quoted;
+
+ // pass through all the arguments
+
+ if ( strlen(cmdline) + strlen(argstr) >= MAX_CMD )
+ DIE( "command line string too long:\n%s%s\n", cmdline, argstr );
+ strcat( cmdline, argstr );
+
+ // create child process
+
+ STARTUPINFO si;
+ PROCESS_INFORMATION pi;
+ ZeroMemory( &si, sizeof(si) );
+ si.cb = sizeof(si);
+ si.dwFlags = STARTF_USESTDHANDLES;// | STARTF_USESHOWWINDOW;
+ //si.dwFlags = STARTF_USESHOWWINDOW;
+ //si.wShowWindow = SW_HIDE ; // can be used to hide console window (requires STARTF_USESHOWWINDOW flag)
+ si.hStdInput = GetStdHandle( STD_INPUT_HANDLE );
+ si.hStdOutput = GetStdHandle( STD_OUTPUT_HANDLE );
+ si.hStdError = GetStdHandle( STD_ERROR_HANDLE );
+ ZeroMemory( &pi, sizeof(pi) );
+
+ if( !CreateProcess(
+ NULL, // module name (uses command line if NULL)
+ cmdline, // command line
+ NULL, // process security atrributes
+ NULL, // thread security atrributes
+ TRUE, // handle inheritance
+ 0, // creation flags, e.g. CREATE_NEW_CONSOLE, CREATE_NO_WINDOW, DETACHED_PROCESS
+ NULL, // pointer to environment block (uses parent if NULL)
+ NULL, // starting directory (uses parent if NULL)
+ &si, // STARTUPINFO structure
+ &pi ) // PROCESS_INFORMATION structure
+ ) DIE( "command execution failed: %s\n", cmdline );
+
+ DWORD ret = 0;
+ CloseHandle( pi.hThread ); // thread handle is not needed
+ if ( WaitForSingleObject( pi.hProcess, INFINITE ) == WAIT_OBJECT_0 ) {
+ if ( !GetExitCodeProcess( pi.hProcess, &ret) )
+ DIE( "unable to retrieve process exit code: %s\n", cmdline );
+ } else DIE( "failed to wait for process termination: %s\n", cmdline );
+ CloseHandle( pi.hProcess );
+
+ // propagate exit code from the child process
+
+ return ret;
+
+}