From 998e0bab068d64092214e4e923e518c599faff61 Mon Sep 17 00:00:00 2001
From: Wayne Davison <wayned@samba.org>
Date: Wed, 22 Aug 2007 00:27:21 +0000
Subject: [PATCH] Matt's --copy-devices patch.

---
 copy-devices.diff | 108 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 copy-devices.diff

diff --git a/copy-devices.diff b/copy-devices.diff
new file mode 100644
index 0000000..21a9ceb
--- /dev/null
+++ b/copy-devices.diff
@@ -0,0 +1,108 @@
+This patch adds the --copy-devices option, which will try to copy
+the data inside a device instead of duplicating the device node.
+
+To use this patch, run these commands for a successful build:
+
+    patch -p1 <patches/copy-devices.diff
+    ./prepare-source
+    ./configure                      (optional if already run)
+    make
+
+--- old/generator.c
++++ new/generator.c
+@@ -39,6 +39,7 @@ extern int preserve_acls;
+ extern int preserve_xattrs;
+ extern int preserve_links;
+ extern int preserve_devices;
++extern int copy_devices;
+ extern int preserve_specials;
+ extern int preserve_hard_links;
+ extern int preserve_perms;
+@@ -1477,7 +1478,7 @@ static void recv_generator(char *fname, 
+ 		goto cleanup;
+ 	}
+ 
+-	if (!S_ISREG(file->mode)) {
++	if (!(S_ISREG(file->mode) || (copy_devices && IS_DEVICE(file->mode)))) {
+ 		if (solo_file)
+ 			fname = f_name(file, NULL);
+ 		rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
+--- old/options.c
++++ new/options.c
+@@ -45,6 +45,7 @@ int append_mode = 0;
+ int keep_dirlinks = 0;
+ int copy_dirlinks = 0;
+ int copy_links = 0;
++int copy_devices = 0;
+ int preserve_links = 0;
+ int preserve_hard_links = 0;
+ int preserve_acls = 0;
+@@ -334,6 +335,7 @@ void usage(enum logcode F)
+   rprintf(F," -o, --owner                 preserve owner (super-user only)\n");
+   rprintf(F," -g, --group                 preserve group\n");
+   rprintf(F,"     --devices               preserve device files (super-user only)\n");
++  rprintf(F,"     --copy-devices          copy device contents as regular file\n");
+   rprintf(F,"     --specials              preserve special files\n");
+   rprintf(F," -D                          same as --devices --specials\n");
+   rprintf(F," -t, --times                 preserve modification times\n");
+@@ -488,6 +490,7 @@ static struct poptOption long_options[] 
+   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
+   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
+   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
++  {"copy-devices",     0,  POPT_ARG_NONE,   &copy_devices, 0, 0, 0 },
+   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
+   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
+   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
+@@ -1944,6 +1947,9 @@ void server_options(char **args,int *arg
+ 	else if (remove_source_files)
+ 		args[ac++] = "--remove-sent-files";
+ 
++	if (copy_devices)
++		args[ac++] = "--copy-devices";
++
+ 	*argc = ac;
+ 	return;
+ 
+--- old/rsync.c
++++ new/rsync.c
+@@ -34,6 +34,7 @@ extern int preserve_perms;
+ extern int preserve_executability;
+ extern int preserve_times;
+ extern int omit_dir_times;
++extern int copy_devices;
+ extern int am_root;
+ extern int am_server;
+ extern int am_sender;
+@@ -220,7 +221,8 @@ int read_ndx_and_attrs(int f_in, int *if
+ 
+ 	if (iflags & ITEM_TRANSFER) {
+ 		int i = ndx - cur_flist->ndx_start;
+-		if (i < 0 || !S_ISREG(cur_flist->files[i]->mode)) {
++		struct file_struct *file = cur_flist->files[i];
++		if (i < 0 || !(S_ISREG(file->mode) || (copy_devices && IS_DEVICE(file->mode)))) {
+ 			rprintf(FERROR,
+ 				"received request to transfer non-regular file: %d [%s]\n",
+ 				ndx, who_am_i());
+--- old/sender.c
++++ new/sender.c
+@@ -314,6 +314,20 @@ void send_files(int f_in, int f_out)
+ 			exit_cleanup(RERR_PROTOCOL);
+ 		}
+ 
++		/* On Matt's computer, st_size is falsely 0 for most devices.
++		 * If this happens, try harder to determine the actual device size. */
++		if (IS_DEVICE(st.st_mode) && st.st_size == 0) {
++			OFF_T off = lseek(fd, 0, SEEK_END);
++			if (off == (OFF_T) -1)
++				rsyserr(FERROR, errno, "failed to seek to end of %s to determine size", fname);
++			else {
++				st.st_size = off;
++				off = lseek(fd, 0, SEEK_SET);
++				if (off != 0)
++					rsyserr(FERROR, errno, "failed to seek back to beginning of %s to read it", fname);
++			}
++		}
++
+ 		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);
-- 
2.34.1