/* execvp_env.c -- exec from vector using PATH, expand environment args */

#include <stdlib.h>		/* for getenv,etc. */ 
#include <string.h>		/* for strdup,etc. */
#include <unistd.h>		/* for execvp */

/* execvp_env -- exec from vector using PATH, expand environment args */
int execvp_env (const char *file, char *const argv[]) 
{
#if defined (__MINGW32__)
  const char *args[50];
#else
  char *args[50];
#endif
  int i;

  for (i=0; argv[i]; i++)
    {
      char* expansion=0;
      if (*argv[i] == '$' && (expansion = getenv(argv[i]+1)))
        args[i] = strdup(expansion);
      else
	args[i] = argv[i];
    }
  args[i] = 0;
  return execvp(args[0],args);
}