#include <stdio.h>
#include <stdlib.h>
#ifdef _WIN32
   #define USERVAR "USERNAME"
#else
   #include <unistd.h>
   #define USERVAR "USER"
#endif
#define chararraysize 2048
int main(void) {
  FILE *outfp = NULL;
  outfp = fopen("${BRLCAD_BINARY_DIR}/include/conf/USER.tmp", "w");
  printf("user name: %s\n", getenv(USERVAR));
  fprintf(outfp, "\"%s\"", getenv(USERVAR));
  fclose(outfp);
  return 0;
}