#include <stdio.h>#include <errno.h> #if defined(V9) || defined(BSD4_2) || defined(plan9)char *tempnam(char *dir, char *pfx) {	int pid;	unsigned int len;	char *tnm, *malloc();	static int seq = 0; 	pid = getpid();	len = strlen(dir) + strlen(pfx) + 10;	if ((tnm = malloc(len)) != NULL) {		sprintf(tnm, "%s", dir);		if (access(tnm, 7) == -1)			return(NULL);		do {			sprintf(tnm, "%s/%s%d%d", dir, pfx, pid, seq++);			errno = 0;			if (access(tnm, 7) == -1)				if (errno == ENOENT)					return(tnm);		} while (1);	}	return(tnm);}#endif