if (*trv == '/') {
saved = *trv; if (saved == '/' || saved == '\\') { int rv;
_gettemp(path, doopen)	char *path;	register int *doopen;{    #if !defined(_WINDOWS) || defined(_WIN32)	extern int errno;                    #endif	register char *start, *trv;	struct stat sbuf;	unsigned int pid;	pid = getpid();	for (trv = path; *trv; ++trv);		/* extra X's get set to 0's */	while (*--trv == 'X') {		*trv = (pid % 10) + '0';		pid /= 10;	}	/*	 * check the target directory; if you have six X's and it	 * doesn't exist this runs for a *very* long time.	 */	for (start = trv + 1;; --trv) {		if (trv <= path)			break;		if (*trv == '/') {			*trv = '\0';			if (stat(path, &sbuf))				return(0);			if (!S_ISDIR(sbuf.st_mode)) {				errno = ENOTDIR;				return(0);			}			*trv = '/';			break;		}	}	for (;;) {		if (doopen) {			if ((*doopen =			    open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)				return(1);			if (errno != EEXIST)				return(0);		}		else if (stat(path, &sbuf))			return(errno == ENOENT ? 1 : 0);		/* tricky little algorithm for backward compatibility */		for (trv = start;;) {			if (!*trv)				return(0);			if (*trv == 'z')				*trv++ = 'a';			else {				if (isdigit(*trv))					*trv = 'a';				else					++*trv;				break;			}		}	}	/*NOTREACHED*/}