641     char_u	    *backup = NULL;  in buf_write()  local
1350 			backup = modname(p, backup_ext, FALSE);  in buf_write()
1369 		    if (backup == NULL)  in buf_write()
1370 			backup = buf_modname((buf->b_p_sn || buf->b_shortname),  in buf_write()
1372 		    if (backup == NULL)  in buf_write()
1380 		    if (mch_stat((char *)backup, &st_new) >= 0)  in buf_write()
1391 			    VIM_CLEAR(backup);	// no backup file to delete  in buf_write()
1411 			    wp = backup + STRLEN(backup) - 1  in buf_write()
1413 			    if (wp < backup)	// empty file name ???  in buf_write()
1414 				wp = backup;  in buf_write()
1417 				    && mch_stat((char *)backup, &st_new) >= 0)  in buf_write()
1421 				VIM_CLEAR(backup);  in buf_write()
1429 		if (backup != NULL)  in buf_write()
1432 		    mch_remove(backup);  in buf_write()
1439 		    bfd = mch_open((char *)backup,  in buf_write()
1446 			VIM_CLEAR(backup);  in buf_write()
1453 			(void)mch_setperm(backup, perm & 0777);  in buf_write()
1464 			    mch_setperm(backup,  in buf_write()
1467 			mch_copy_sec(fname, backup);  in buf_write()
1496 			set_file_time(backup, st_old.st_atime, st_old.st_mtime);  in buf_write()
1499 			mch_set_acl(backup, acl);  in buf_write()
1502 			mch_copy_sec(fname, backup);  in buf_write()
1505 			(void)mch_copy_file_attribute(fname, backup);  in buf_write()
1515 	    if (backup == NULL && errmsg == NULL)  in buf_write()
1558 			backup = modname(p, backup_ext, FALSE);  in buf_write()
1562 		if (backup == NULL)  in buf_write()
1566 			backup = NULL;  in buf_write()
1569 			backup = buf_modname(  in buf_write()
1576 		if (backup != NULL)  in buf_write()
1581 		    if (!p_bk && mch_getperm(backup) >= 0)  in buf_write()
1583 			p = backup + STRLEN(backup) - 1 - STRLEN(backup_ext);  in buf_write()
1584 			if (p < backup)	// empty file name ???  in buf_write()
1585 			    p = backup;  in buf_write()
1587 			while (*p > 'a' && mch_getperm(backup) >= 0)  in buf_write()
1591 			    VIM_CLEAR(backup);  in buf_write()
1594 		if (backup != NULL)  in buf_write()
1603 		    if (vim_rename(fname, backup) == 0)  in buf_write()
1606 		    VIM_CLEAR(backup);   // don't do the rename below  in buf_write()
1609 	    if (backup == NULL && !forceit)  in buf_write()
1650 					      && !(exiting && backup != NULL))  in buf_write()
1858 		    if (backup != NULL && wfname == fname)  in buf_write()
1870 				vim_rename(backup, fname);  in buf_write()
1873 				mch_remove(backup);  in buf_write()
1878 			    vim_rename(backup, fname);  in buf_write()
1918 	    if (backup != NULL && overwriting && !append)  in buf_write()
1919 		(void)mch_copy_file_attribute(backup, wfname);  in buf_write()
2191 	    mch_copy_sec(backup, wfname);  in buf_write()
2197 	if (backup != NULL && !backup_copy)  in buf_write()
2312 	if (backup != NULL)  in buf_write()
2323 		if ((fd = mch_open((char *)backup, O_RDONLY | O_EXTRA, 0)) >= 0)  in buf_write()
2346 		if (vim_rename(backup, fname) == 0)  in buf_write()
2451 	if (backup != NULL)  in buf_write()
2461 		vim_rename(backup, (char_u *)org);  in buf_write()
2462 		VIM_CLEAR(backup);	    // don't delete the file  in buf_write()
2491     if (!p_bk && backup != NULL && !write_info.bw_conv_error  in buf_write()
2492 	    && mch_remove(backup) != 0)  in buf_write()
2505     vim_free(backup);  in buf_write()