Wine: запустить unix process и подождать

#include <stdio.h>
#include <windows.h>
int main(int argc, char **argv)
{
        printf("winegcc test\n");
        void *dll = LoadLibraryA("wine-wrap.dll.so");
        printf("dll %x\n", dll);
        int (*wrap)(const char*) = (void*)GetProcAddress(dll, "wrap");
        int r = wrap(argv[1]);
        printf("ret %d\n", r);
        return r;
}

#include <stdlib.h>
#include <stdio.h>
int unix_wrap(char *arg)
{
    printf("unix_wrap %s\n", arg);
    return system(arg);
}

@ cdecl -arch=x86_64 wrap(ptr) wrap

#include <windef.h>
#include <stdio.h>
BOOL WINAPI DllMain(INT par1, INT par2)
{
        printf("Here is DllMain, par1=%d, par2=%d\n", par1, par2);
        return TRUE;
}

extern int unix_wrap(char *arg);
int WINAPI wrap(char *arg)
{
        printf("wrap %s", arg);
        return unix_wrap(arg);
}

#include <stdio.h>
#include <spawn.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>

int main(int argc, char *argv[], char *envp[])
{
  
  char *me = argv[0];
  size_t len = strlen(me);

  if (len>65535) {
    return 255;
  }

  int dot = (int)len, slash = 0;

  for (int i = (int)len-1; i>0; i--) {
    if (me[i]=='/' || me[i]=='\\') {
      slash = i;
      break;
    }
    if (me[i]=='.') {
      dot = i;
    }
  }

  me[dot] = '\0';
  argv[0] = me+slash;

  pid_t child;
  int rc = posix_spawnp(&child, argv[0], NULL, NULL, argv, envp);
  // printf("posix_spawn: %d\n", rc);
  if (rc) {
    errno = rc;
    perror("posix_spawn");
    return 255;
  }
  int wstatus;
  for (;;) {
    pid_t wr = waitpid(child, &wstatus,0);
    if (wr == -1) {
      if (errno!=EINTR)
	return 255;
    }
    if (WIFEXITED(wstatus)) {
      return WEXITSTATUS(wstatus);
    }
  }
}