Pixel-Composer/extensions/libxprocess/libxprocess.gml

#define libxprocess_init
globalvar fd_stdin, fd_stdout, pid_stdin, pid_stdout, fd_enable;
fd_stdin  = -1; 
fd_stdout = -1;
fd_enable = false;

#define execute_shell
prog = argument0; arg = argument1;
prog = string_replace_all(prog, @'\', @'\\');
prog = string_replace_all(prog, @'"', @'\"');
if (os_type == os_windows && 
  (string_lower(filename_name(prog)) == "cmd" ||
  string_lower(filename_name(prog)) == "cmd.exe")) 
{ prog = "cmd.exe"; arg = "/c " + arg; } 
prog = @'"' + prog + @'"';
pid = ProcessExecuteAsync(prog + " " + arg);
if (!fd_enable) {
  FreeExecutedProcessStandardInput(pid);
  FreeExecutedProcessStandardOutput(pid);
}
return pid;

#define execute_program
prog = argument0; arg = argument1; wait = argument2;
pid = execute_shell(prog, arg);
while (!CompletionStatusFromExecutedProcess(pid) && wait) { }
return pid;

#define file_text_enable_stddesc
enable = argument0;
fd_enable = enable;

#define file_text_open_write_stdin
pid = argument0;
if (fd_enable) {
  fd_stdin += 1; pid_stdin[fd_stdin] = pid;
  return pid_stdin[fd_stdin];
}
return -1;

#define file_text_write_string_stdin
file = argument0; str = argument1;
return ExecutedProcessWriteToStandardInput(file, str);

#define file_text_close_stdin
file = argument0;
return FreeExecutedProcessStandardInput(file);

#define file_text_open_read_stdout
pid = argument0;
if (fd_enable) {
  fd_stdout += 1; pid_stdout[fd_stdout] = pid;
  return pid_stdout[fd_stdout];
}
return -1;

#define file_text_read_string_stdout
file = argument0;
return ExecutedProcessReadFromStandardOutput(file);

#define file_text_close_stdout
file = argument0;
return FreeExecutedProcessStandardOutput(file);