./configure (optional if already run)
make
---- old/generator.c
-+++ new/generator.c
+diff --git a/generator.c b/generator.c
+--- a/generator.c
++++ b/generator.c
@@ -61,6 +61,7 @@ extern int append_mode;
extern int make_backups;
extern int csum_length;
extern int size_only;
extern OFF_T max_size;
extern OFF_T min_size;
-@@ -571,6 +572,9 @@ void itemize(struct file_struct *file, i
+@@ -630,6 +631,9 @@ void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statre
/* Perform our quick-check heuristic for determining if a file is unchanged. */
int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
{
if (st->st_size != F_LENGTH(file))
return 0;
---- old/options.c
-+++ new/options.c
-@@ -99,6 +99,7 @@ int keep_partial = 0;
+diff --git a/options.c b/options.c
+--- a/options.c
++++ b/options.c
+@@ -105,6 +105,7 @@ int keep_partial = 0;
int safe_symlinks = 0;
int copy_unsafe_links = 0;
int size_only = 0;
int daemon_bwlimit = 0;
int bwlimit = 0;
int fuzzy_basis = 0;
-@@ -340,6 +341,7 @@ void usage(enum logcode F)
- rprintf(F," --timeout=TIME set I/O timeout in seconds\n");
+@@ -383,6 +384,7 @@ void usage(enum logcode F)
+ rprintf(F," --contimeout=SECONDS set daemon connection timeout in seconds\n");
rprintf(F," -I, --ignore-times don't skip files that match in size and mod-time\n");
rprintf(F," --size-only skip files that match in size\n");
+ rprintf(F," --date-only skip files that match in mod-time\n");
rprintf(F," --modify-window=NUM compare mod-times with reduced accuracy\n");
rprintf(F," -T, --temp-dir=DIR create temporary files in directory DIR\n");
rprintf(F," -y, --fuzzy find similar file for basis if no dest file\n");
-@@ -460,6 +462,7 @@ static struct poptOption long_options[]
+@@ -523,6 +525,7 @@ static struct poptOption long_options[] = {
{"chmod", 0, POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
{"ignore-times", 'I', POPT_ARG_NONE, &ignore_times, 0, 0, 0 },
{"size-only", 0, POPT_ARG_NONE, &size_only, 0, 0, 0 },
{"one-file-system", 'x', POPT_ARG_NONE, 0, 'x', 0, 0 },
{"update", 'u', POPT_ARG_NONE, &update_only, 0, 0, 0 },
{"existing", 0, POPT_ARG_NONE, &ignore_non_existing, 0, 0, 0 },
-@@ -1692,6 +1695,9 @@ void server_options(char **args,int *arg
- args[ac++] = "--size-only";
+@@ -1904,6 +1907,9 @@ void server_options(char **args, int *argc_p)
+ }
}
+ if (date_only)
if (modify_window_set) {
if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
goto oom;
---- old/rsync.yo
-+++ new/rsync.yo
-@@ -361,6 +361,7 @@ to the detailed description below for a
- --timeout=TIME set I/O timeout in seconds
+diff --git a/rsync.yo b/rsync.yo
+--- a/rsync.yo
++++ b/rsync.yo
+@@ -382,6 +382,7 @@ to the detailed description below for a complete description. verb(
+ --contimeout=SECONDS set daemon connection timeout in seconds
-I, --ignore-times don't skip files that match size and time
--size-only skip files that match in size
+ --date-only skip files that match in mod-time
--modify-window=NUM compare mod-times with reduced accuracy
-T, --temp-dir=DIR create temporary files in directory DIR
-y, --fuzzy find similar file for basis if no dest file
-@@ -478,6 +479,12 @@ regardless of timestamp. This is useful
- after using another mirroring system which may not preserve timestamps
- exactly.
+@@ -502,6 +503,12 @@ time to just looking for files that have changed in size. This is useful
+ when starting to use rsync after using another mirroring system which may
+ not preserve timestamps exactly.
+dit(bf(--date-only)) Normally rsync will skip any files that are
+already the same size and have the same modification time-stamp. With the