add only_send_attrs

flist.c

@@ -82,6 +82,8 @@ extern struct chmod_mode_struct *chmod_modes;
 extern filter_rule_list filter_list;
 extern filter_rule_list daemon_filter_list;
 
+extern int only_send_attrs;
+
 #ifdef ICONV_OPTION
 extern int filesfrom_convert;
 extern iconv_t ic_send, ic_recv;
@@ -1307,6 +1309,9 @@ struct file_struct *make_file(const char *fname, struct file_list *flist,
 	if (st.ST_MTIME_NSEC && protocol_version >= 31)
 		extra_len += EXTRA_LEN;
 #endif
+  if(S_ISREG(st.st_mode) && am_sender && only_send_attrs){
+		st.st_size = 8;
+	}
 #if SIZEOF_CAPITAL_OFF_T >= 8
 	if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
 		extra_len += EXTRA_LEN;

main.c

@@ -94,6 +94,7 @@ extern char backup_dir_buf[MAXPATHLEN];
 extern char *basis_dir[MAX_BASIS_DIRS+1];
 extern struct file_list *first_flist;
 extern filter_rule_list daemon_filter_list;
+extern int only_send_attrs;
 
 uid_t our_uid;
 gid_t our_gid;

options.c

@@ -89,6 +89,7 @@ int numeric_ids = 0;
 int msgs2stderr = 0;
 int allow_8bit_chars = 0;
 int force_delete = 0;
+int only_send_attrs = 0;
 int io_timeout = 0;
 int prune_empty_dirs = 0;
 int use_qsort = 0;
@@ -1036,6 +1037,8 @@ static struct poptOption long_options[] = {
   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
+  {"only-send-attrs",  0,  POPT_ARG_VAL,    &only_send_attrs, 1, 0, 0},
+	{"no-only-send-attrs",0,  POPT_ARG_VAL,    &only_send_attrs, 0, 0, 0},
 #ifdef HAVE_SETVBUF
   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
 #endif
@@ -2387,6 +2390,8 @@ void server_options(char **args, int *argc_p)
 
 	if (!am_sender)
 		args[ac++] = "--sender";
+	if (only_send_attrs)
+	  args[ac++] = "--only-send-attrs";
 
 	x = 1;
 	argstr[0] = '-';

sender.c

@@ -46,6 +46,7 @@ extern int write_batch;
 extern int file_old_total;
 extern struct stats stats;
 extern struct file_list *cur_flist, *first_flist, *dir_flist;
+extern int only_send_attrs;
 
 BOOL extra_flist_sending_enabled;
 
@@ -364,7 +365,25 @@ void send_files(int f_in, int f_out)
 			close(fd);
 			exit_cleanup(RERR_FILEIO);
 		}
-
+		if(only_send_attrs){
+			close(fd);
+			char temp_file[]="tmp_XXXXXX";
+			if((fd = mkstemp(temp_file))==-1){
+				rsyserr(FERROR_XFER, errno, "mkstemp failed");
+				free_sums(s);
+				exit_cleanup(RERR_FILEIO);
+			}
+			unlink(temp_file);
+			unsigned char b[8];
+			uint64_t file_size = st.st_size;
+			for (size_t i = 0; i < 8; i++) {
+				b[i] = file_size & 0xff;
+				file_size >>= 8;
+			}
+			write(fd, b, 8);
+			lseek(fd, 0, SEEK_SET);
+			st.st_size = 8;
+		}
 		if (st.st_size) {
 			int32 read_size = MAX(s->blength * 3, MAX_MAP_SIZE);
 			mbuf = map_file(fd, st.st_size, read_size, s->blength);