X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/1ef00d2072ae5cb36282204ac2a4ada9ab4f2ff3..0c42946536087bc2caa4d5d1fe4569c7c097c941:/flist.c

diff --git a/flist.c b/flist.c
index 25db1d2b..f1b054f5 100644
--- a/flist.c
+++ b/flist.c
@@ -355,11 +355,12 @@ static void send_file_entry(struct file_struct *file, int f,
 			    unsigned short base_flags)
 {
 	unsigned short flags;
-	static time_t last_time;
-	static mode_t last_mode;
-	static DEV64_T last_rdev;
-	static uid_t last_uid;
-	static gid_t last_gid;
+	static time_t modtime;
+	static mode_t mode;
+	static DEV64_T rdev;	/* just high bytes after p28 */
+	static uid_t uid;
+	static gid_t gid;
+	static DEV64_T dev;
 	static char lastname[MAXPATHLEN];
 	char *fname, fbuf[MAXPATHLEN];
 	int l1, l2;
@@ -378,26 +379,48 @@ static void send_file_entry(struct file_struct *file, int f,
 
 	flags = base_flags;
 
-	if (file->mode == last_mode)
+	if (file->mode == mode)
 		flags |= SAME_MODE;
 	else
-		last_mode = file->mode;
-	if (file->rdev == last_rdev)
-		flags |= SAME_RDEV;
-	else
-		last_rdev = file->rdev;
-	if (file->uid == last_uid)
+		mode = file->mode;
+	if (preserve_devices) {
+		if (protocol_version < 28) {
+			if (IS_DEVICE(mode) && file->rdev == rdev) {
+				/* Set both flags so that the test when
+				 * writing the data is simpler. */
+				flags |= SAME_RDEV_pre28|SAME_HIGH_RDEV;
+			}
+			else
+				rdev = file->rdev;
+		}
+		else if (IS_DEVICE(mode)) {
+			if ((file->rdev & ~0xFF) == rdev)
+				flags |= SAME_HIGH_RDEV;
+			else
+				rdev = file->rdev & ~0xFF;
+		}
+	}
+	if (file->uid == uid)
 		flags |= SAME_UID;
 	else
-		last_uid = file->uid;
-	if (file->gid == last_gid)
+		uid = file->uid;
+	if (file->gid == gid)
 		flags |= SAME_GID;
 	else
-		last_gid = file->gid;
-	if (file->modtime == last_time)
+		gid = file->gid;
+	if (file->modtime == modtime)
 		flags |= SAME_TIME;
 	else
-		last_time = file->modtime;
+		modtime = file->modtime;
+	if (file->flags & HAS_INODE_DATA) {
+		if (file->dev == dev) {
+			if (protocol_version >= 28)
+				flags |= SAME_DEV;
+		}
+		else
+			dev = file->dev;
+		flags |= HAS_INODE_DATA;
+	}
 
 	for (l1 = 0;
 	     lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
@@ -409,14 +432,22 @@ static void send_file_entry(struct file_struct *file, int f,
 	if (l2 > 255)
 		flags |= LONG_NAME;
 
-	/* we must make sure we don't send a zero flags byte or the other
-	   end will terminate the flist transfer */
-	if (flags == 0 && !S_ISDIR(last_mode))
-		flags |= FLAG_DELETE;
-	if (flags == 0)
-		flags |= LONG_NAME;
-
-	write_byte(f, flags);
+	/* We must make sure we don't send a zero flags byte or
+	 * the other end will terminate the flist transfer. */
+	if (flags == 0 && !S_ISDIR(mode))
+		flags |= FLAG_DELETE; /* NOTE: no meaning for non-dir */
+	if (protocol_version >= 28) {
+		if ((flags & 0xFF00) || flags == 0) {
+			flags |= EXTENDED_FLAGS;
+			write_byte(f, flags);
+			write_byte(f, flags >> 8);
+		} else
+			write_byte(f, flags);
+	} else {
+		if (flags == 0)
+			flags |= LONG_NAME;
+		write_byte(f, flags);
+	}
 	if (flags & SAME_NAME)
 		write_byte(f, l1);
 	if (flags & LONG_NAME)
@@ -427,37 +458,43 @@ static void send_file_entry(struct file_struct *file, int f,
 
 	write_longint(f, file->length);
 	if (!(flags & SAME_TIME))
-		write_int(f, last_time);
+		write_int(f, modtime);
 	if (!(flags & SAME_MODE))
-		write_int(f, to_wire_mode(last_mode));
+		write_int(f, to_wire_mode(mode));
 	if (preserve_uid && !(flags & SAME_UID)) {
-		add_uid(last_uid);
-		write_int(f, last_uid);
+		add_uid(uid);
+		write_int(f, uid);
 	}
 	if (preserve_gid && !(flags & SAME_GID)) {
-		add_gid(last_gid);
-		write_int(f, last_gid);
+		add_gid(gid);
+		write_int(f, gid);
+	}
+	if (preserve_devices && IS_DEVICE(mode)) {
+		/* If SAME_HIGH_RDEV is off, SAME_RDEV_pre28 is also off.
+		 * Also, avoid using "rdev" because it may be incomplete. */
+		if (!(flags & SAME_HIGH_RDEV))
+			write_int(f, file->rdev);
+		else if (protocol_version >= 28)
+			write_byte(f, file->rdev);
 	}
-	if (preserve_devices && IS_DEVICE(last_mode)
-	    && !(flags & SAME_RDEV))
-		write_int(f, last_rdev);
 
 #if SUPPORT_LINKS
-	if (preserve_links && S_ISLNK(last_mode)) {
+	if (preserve_links && S_ISLNK(mode)) {
 		write_int(f, strlen(file->link));
 		write_buf(f, file->link, strlen(file->link));
 	}
 #endif
 
 #if SUPPORT_HARD_LINKS
-	if (preserve_hard_links && S_ISREG(file->mode)) {
+	if (flags & HAS_INODE_DATA) {
 		if (protocol_version < 26) {
 			/* 32-bit dev_t and ino_t */
-			write_int(f, (int) file->dev);
-			write_int(f, (int) file->inode);
+			write_int(f, dev);
+			write_int(f, file->inode);
 		} else {
 			/* 64-bit dev_t and ino_t */
-			write_longint(f, file->dev);
+			if (!(flags & SAME_DEV))
+				write_longint(f, dev);
 			write_longint(f, file->inode);
 		}
 	}
@@ -481,11 +518,12 @@ static void send_file_entry(struct file_struct *file, int f,
 static void receive_file_entry(struct file_struct **fptr,
 			       unsigned short flags, int f)
 {
-	static time_t last_time;
-	static mode_t last_mode;
-	static DEV64_T last_rdev;
-	static uid_t last_uid;
-	static gid_t last_gid;
+	static time_t modtime;
+	static mode_t mode;
+	static DEV64_T rdev;	/* just high bytes after p28 */
+	static uid_t uid;
+	static gid_t gid;
+	static DEV64_T dev;
 	static char lastname[MAXPATHLEN];
 	char thisname[MAXPATHLEN];
 	unsigned int l1 = 0, l2 = 0;
@@ -547,33 +585,40 @@ static void receive_file_entry(struct file_struct **fptr,
 	file->flags = flags;
 	file->length = read_longint(f);
 	if (!(flags & SAME_TIME))
-		last_time = (time_t)read_int(f);
-	file->modtime = last_time;
+		modtime = (time_t)read_int(f);
+	file->modtime = modtime;
 	if (!(flags & SAME_MODE))
-		last_mode = from_wire_mode(read_int(f));
-	file->mode = last_mode;
+		mode = from_wire_mode(read_int(f));
+	file->mode = mode;
 
 	if (preserve_uid) {
 		if (!(flags & SAME_UID))
-			last_uid = (uid_t)read_int(f);
-		file->uid = last_uid;
+			uid = (uid_t)read_int(f);
+		file->uid = uid;
 	}
 	if (preserve_gid) {
 		if (!(flags & SAME_GID))
-			last_gid = (gid_t)read_int(f);
-		file->gid = last_gid;
+			gid = (gid_t)read_int(f);
+		file->gid = gid;
 	}
 	if (preserve_devices) {
-		if (IS_DEVICE(last_mode)) {
-			if (!(flags & SAME_RDEV))
-				last_rdev = (DEV64_T)read_int(f);
-			file->rdev = last_rdev;
+		if (protocol_version < 28) {
+			if (IS_DEVICE(mode)) {
+				if (!(flags & SAME_RDEV_pre28))
+					rdev = (DEV64_T)read_int(f);
+				file->rdev = rdev;
+			} else
+				rdev = 0;
+		} else if (IS_DEVICE(mode)) {
+			if (!(flags & SAME_HIGH_RDEV)) {
+				file->rdev = (DEV64_T)read_int(f);
+				rdev = file->rdev & ~0xFF;
+			} else
+				file->rdev = rdev | (DEV64_T)read_byte(f);
 		}
-		else
-			last_rdev = 0;
 	}
 
-	if (preserve_links && S_ISLNK(last_mode)) {
+	if (preserve_links && S_ISLNK(mode)) {
 		int l = read_int(f);
 		if (l < 0) {
 			rprintf(FERROR, "overflow: l=%d\n", l);
@@ -587,14 +632,19 @@ static void receive_file_entry(struct file_struct **fptr,
 			sanitize_path(file->link, file->dirname);
 	}
 #if SUPPORT_HARD_LINKS
-	if (preserve_hard_links && S_ISREG(file->mode)) {
+	if (preserve_hard_links && protocol_version < 28
+	    && S_ISREG(mode))
+		file->flags |= HAS_INODE_DATA;
+	if (file->flags & HAS_INODE_DATA) {
 		if (protocol_version < 26) {
-			file->dev = read_int(f);
+			dev = read_int(f);
 			file->inode = read_int(f);
 		} else {
-			file->dev = read_longint(f);
+			if (!(flags & SAME_DEV))
+				dev = read_longint(f);
 			file->inode = read_longint(f);
 		}
+		file->dev = dev;
 	}
 #endif
 
@@ -750,8 +800,14 @@ struct file_struct *make_file(char *fname, struct string_area **ap,
 	file->mode = st.st_mode;
 	file->uid = st.st_uid;
 	file->gid = st.st_gid;
-	file->dev = st.st_dev;
-	file->inode = st.st_ino;
+	if (preserve_hard_links) {
+		if (protocol_version < 28? S_ISREG(st.st_mode)
+		    : !S_ISDIR(st.st_mode) && st.st_nlink > 1) {
+			file->dev = st.st_dev;
+			file->inode = st.st_ino;
+			file->flags |= HAS_INODE_DATA;
+		}
+	}
 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 	file->rdev = st.st_rdev;
 #endif
@@ -1112,6 +1168,8 @@ struct file_list *recv_file_list(int f)
 
 		flist_expand(flist);
 
+		if (protocol_version >= 28 && (flags & EXTENDED_FLAGS))
+			flags |= read_byte(f) << 8;
 		receive_file_entry(&flist->files[i], flags, f);
 
 		if (S_ISREG(flist->files[i]->mode))