sys_execex.c

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#include "../fb.h"
#include "fb_private_console.h"
#include <process.h>

FBCALL int fb_ExecEx( FBSTRING *program, FBSTRING *args, int do_fork )
{
    char buffer[MAX_PATH+1], *application, *arguments;
    int res = 0, got_program;
    size_t len_arguments;
#ifndef HOST_MINGW
    size_t len_program;
#endif

    got_program = (program != NULL) && (program->data != NULL);

    if( !got_program ) {
        fb_hStrDelTemp( args );
        fb_hStrDelTemp( program );
        return -1;
    }

    application = fb_hGetShortPath( program->data, buffer, MAX_PATH );
    DBG_ASSERT( application!=NULL );
    if( application==program->data ) {
        application = buffer;
        FB_MEMCPY(application, program->data, FB_STRSIZE( program ) );
    }

#ifdef HOST_MINGW
    if( args==NULL ) {
        arguments = "";
    } else {
        len_arguments = FB_STRSIZE( args );
        arguments = alloca( len_arguments + 1 );
        DBG_ASSERT( arguments!=NULL );
        if( len_arguments )
            FB_MEMCPY( arguments, args->data, len_arguments );
        arguments[len_arguments] = 0;
    }
#else
    len_program = strlen( buffer );
    len_arguments = ( ( args==NULL ) ? 0 : FB_STRSIZE( args ) );

    arguments = alloca( len_program + len_arguments + 2 );
    DBG_ASSERT( arguments!=NULL );

    FB_MEMCPY( arguments, buffer, len_program );
    arguments[len_program] = ' ';
    if( len_arguments!=0 )
        FB_MEMCPY( arguments + len_program + 1, args->data, len_arguments );
    arguments[len_program + len_arguments + 1] = 0;
#endif

        FB_STRLOCK();

        fb_hStrDelTemp_NoLock( args );
    fb_hStrDelTemp_NoLock( program );

    FB_STRUNLOCK();

    FB_CON_CORRECT_POSITION();

        {
#ifdef HOST_MINGW
        if( do_fork )
                res = _spawnl( _P_WAIT, buffer, buffer, arguments, NULL );
        else
                res = _execl( buffer, buffer, arguments, NULL );
#else
        STARTUPINFO StartupInfo;
        PROCESS_INFORMATION ProcessInfo;
        memset( &StartupInfo, 0, sizeof(StartupInfo) );
        StartupInfo.cb = sizeof(StartupInfo);

        if( !CreateProcess( NULL,        /* application name - correct! */
                            arguments,   /* command line */
                            NULL, NULL,  /* default security descriptors */
                            FALSE,       /* don't inherit handles */
                            CREATE_DEFAULT_ERROR_MODE, /* do we really need this? */
                            NULL,        /* default environment */
                            NULL,        /* current directory */
                            &StartupInfo,
                            &ProcessInfo ) )
        {
            res = -1;
        } else {
            /* Release main thread handle - we're not interested in it */
            CloseHandle( ProcessInfo.hThread );
            if( do_fork ) {
                DWORD dwExitCode;
                WaitForSingleObject( ProcessInfo.hProcess,
                                     INFINITE );
                if( !GetExitCodeProcess( ProcessInfo.hProcess, &dwExitCode ) ) {
                    res = -1;
                } else {
                    res = (int) dwExitCode;
                }
                CloseHandle( ProcessInfo.hProcess );
            } else {
                res = (int) ProcessInfo.hProcess;
            }
        }
#endif
        }

        return res;
}