早期freebsd实现

				/*	@(#)rename.c	1.2 90/01/03 NFS Rev 2 Testsuite				 *	1.3 Lachman ONC Test Suite source				 *				 * rename a file n times				 */				#include 				#ifdef SVR3				#include 				#else				#include 				#endif								main(argc, argv)					int argc;					char *argv[];				{					int count;					int i;					int fd;									if (argc != 2) {						fprintf(stderr, "usage: %s \n", argv[0]);						exit(1);					}					if ((fd = open("rename1", O_CREAT, 0666)) < 0) {						perror("rename1");						exit(1);					}					close(fd);									count = atoi(argv[1]);					for (i=0; i						if (rename("rename1", "rename2") < 0) {							perror("rename rename1 to rename2");							fprintf(stderr, "%d of %d\n", i, count);							exit(1);						}						if (rename("rename2", "rename1") < 0) {							perror("rename rename2 to rename1");							fprintf(stderr, "%d of %d\n", i, count);							exit(1);						}					}				cleanup:					unlink("rename1");					unlink("rename2");					exit(0);				}