X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/43a481dc5586a16af249fbae611b36442bed6a8c..0f78b81511be65d8fe21af1e6ac674f9e80ac29d:/compat.c

diff --git a/compat.c b/compat.c
index 64808a04..c8066bda 100644
--- a/compat.c
+++ b/compat.c
@@ -1,193 +1,119 @@
-/* 
-   Copyright (C) Andrew Tridgell 1996
-   Copyright (C) Paul Mackerras 1996
-   
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-   
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-   
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-/* compatability routines for older rsync protocol versions */
+/*
+ * Compatibility routines for older rsync protocol versions.
+ *
+ * Copyright (C) Andrew Tridgell 1996
+ * Copyright (C) Paul Mackerras 1996
+ * Copyright (C) 2004, 2005, 2006 Wayne Davison
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
 
 #include "rsync.h"
 
-extern int csum_length;
-
-extern int preserve_links;
-extern int preserve_perms;
-extern int preserve_devices;
-extern int preserve_uid;
-extern int preserve_gid;
-extern int preserve_times;
-extern int always_checksum;
-
-
-extern int remote_version;
-
- void (*send_file_entry)(struct file_struct *file,int f) = NULL;
- void (*receive_file_entry)(struct file_struct *file,
-			    unsigned char flags,int f) = NULL;
-
-
-void send_file_entry_v10(struct file_struct *file,int f)
-{
-  unsigned char flags;
-  static mode_t last_mode=0;
-  static dev_t last_dev=0;
-  static uid_t last_uid=0;
-  static gid_t last_gid=0;
-  static char lastdir[MAXPATHLEN]="";
-  char *p=NULL;
-
-  if (f == -1) return;
-
-  if (!file) {
-    write_byte(f,0);
-    return;
-  }
-
-  flags = FILE_VALID;
-
-  if (file->mode == last_mode) flags |= SAME_MODE;
-  if (file->dev == last_dev) flags |= SAME_DEV;
-  if (file->uid == last_uid) flags |= SAME_UID;
-  if (file->gid == last_gid) flags |= SAME_GID;
-    
-  if (strncmp(file->name,lastdir,strlen(lastdir)) == 0) {
-    flags |= SAME_DIR;
-    p = file->name + strlen(lastdir);
-  } else {
-    p = file->name;
-  }
-
-  write_byte(f,flags);
-  if (flags & SAME_DIR)
-    write_byte(f,strlen(p));
-  else
-    write_int(f,strlen(p));
-  write_buf(f,p,strlen(p));
-  write_int(f,(int)file->modtime);
-  write_int(f,(int)file->length);
-  if (!(flags & SAME_MODE))
-    write_int(f,(int)file->mode);
-  if (preserve_uid && !(flags & SAME_UID))
-    write_int(f,(int)file->uid);
-  if (preserve_gid && !(flags & SAME_GID))
-    write_int(f,(int)file->gid);
-  if (preserve_devices && IS_DEVICE(file->mode) && !(flags & SAME_DEV))
-    write_int(f,(int)file->dev);
-
-#if SUPPORT_LINKS
-  if (preserve_links && S_ISLNK(file->mode)) {
-    write_int(f,strlen(file->link));
-    write_buf(f,file->link,strlen(file->link));
-  }
-#endif
-
-  if (always_checksum) {
-    write_buf(f,file->sum,csum_length);
-  }       
-
-  last_mode = file->mode;
-  last_dev = file->dev;
-  last_uid = file->uid;
-  last_gid = file->gid;
-  p = strrchr(file->name,'/');
-  if (p) {
-    int l = (int)(p - file->name) + 1;
-    strncpy(lastdir,file->name,l);
-    lastdir[l] = 0;
-  } else {
-    strcpy(lastdir,"");
-  }
-}
+int remote_protocol = 0;
 
+extern int verbose;
+extern int am_server;
+extern int inplace;
+extern int fuzzy_basis;
+extern int read_batch;
+extern int checksum_seed;
+extern int basis_dir_cnt;
+extern int prune_empty_dirs;
+extern int protocol_version;
+extern char *dest_option;
 
-
-void receive_file_entry_v10(struct file_struct *file,
-			    unsigned char flags,int f)
+void setup_protocol(int f_out,int f_in)
 {
-  static mode_t last_mode=0;
-  static dev_t last_dev=0;
-  static uid_t last_uid=0;
-  static gid_t last_gid=0;
-  static char lastdir[MAXPATHLEN]="";
-  char *p=NULL;
-  int l1,l2;
-
-  if (flags & SAME_DIR) {
-    l1 = read_byte(f);
-    l2 = strlen(lastdir);
-  } else {
-    l1 = read_int(f);
-    l2 = 0;
-  }
-
-  file->name = (char *)malloc(l1+l2+1);
-  if (!file->name) out_of_memory("receive_file_entry");
-
-  strncpy(file->name,lastdir,l2);
-  read_buf(f,file->name+l2,l1);
-  file->name[l1+l2] = 0;
-
-  file->modtime = (time_t)read_int(f);
-  file->length = (off_t)read_int(f);
-  file->mode = (flags & SAME_MODE) ? last_mode : (mode_t)read_int(f);
-  if (preserve_uid)
-    file->uid = (flags & SAME_UID) ? last_uid : (uid_t)read_int(f);
-  if (preserve_gid)
-    file->gid = (flags & SAME_GID) ? last_gid : (gid_t)read_int(f);
-  if (preserve_devices && IS_DEVICE(file->mode))
-    file->dev = (flags & SAME_DEV) ? last_dev : (dev_t)read_int(f);
-
-#if SUPPORT_LINKS
-  if (preserve_links && S_ISLNK(file->mode)) {
-    int l = read_int(f);
-    file->link = (char *)malloc(l+1);
-    if (!file->link) out_of_memory("receive_file_entry");
-    read_buf(f,file->link,l);
-    file->link[l] = 0;
-  }
-#endif
-  
-  if (always_checksum)
-    read_buf(f,file->sum,csum_length);
-  
-  last_mode = file->mode;
-  last_dev = file->dev;
-  last_uid = file->uid;
-  last_gid = file->gid;
-  p = strrchr(file->name,'/');
-  if (p) {
-    int l = (int)(p - file->name) + 1;
-    strncpy(lastdir,file->name,l);
-    lastdir[l] = 0;
-  } else {
-    strcpy(lastdir,"");
-  }
+	if (remote_protocol == 0) {
+		if (!read_batch)
+			write_int(f_out, protocol_version);
+		remote_protocol = read_int(f_in);
+		if (protocol_version > remote_protocol)
+			protocol_version = remote_protocol;
+	}
+	if (read_batch && remote_protocol > protocol_version) {
+	        rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
+			remote_protocol, protocol_version);
+		exit_cleanup(RERR_PROTOCOL);
+	}
+
+	if (verbose > 3) {
+		rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
+			am_server? "Server" : "Client", remote_protocol, protocol_version);
+	}
+	if (remote_protocol < MIN_PROTOCOL_VERSION
+	 || remote_protocol > MAX_PROTOCOL_VERSION) {
+		rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
+		rprintf(FERROR,"(see the rsync man page for an explanation)\n");
+		exit_cleanup(RERR_PROTOCOL);
+	}
+	if (remote_protocol < OLD_PROTOCOL_VERSION) {
+		rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
+			am_server? "Client" : "Server");
+	}
+	if (protocol_version < MIN_PROTOCOL_VERSION) {
+		rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
+			MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
+		exit_cleanup(RERR_PROTOCOL);
+	}
+	if (protocol_version > PROTOCOL_VERSION) {
+		rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
+			PROTOCOL_VERSION, am_server? "Server" : "Client");
+		exit_cleanup(RERR_PROTOCOL);
+	}
+
+	if (protocol_version < 29) {
+		if (fuzzy_basis) {
+			rprintf(FERROR,
+			    "--fuzzy requires protocol 29 or higher"
+			    " (negotiated %d).\n",
+			    protocol_version);
+			exit_cleanup(RERR_PROTOCOL);
+		}
+
+		if (basis_dir_cnt && inplace) {
+			rprintf(FERROR,
+			    "%s with --inplace requires protocol 29 or higher"
+			    " (negotiated %d).\n",
+			    dest_option, protocol_version);
+			exit_cleanup(RERR_PROTOCOL);
+		}
+
+		if (basis_dir_cnt > 1) {
+			rprintf(FERROR,
+			    "Using more than one %s option requires protocol"
+			    " 29 or higher (negotiated %d).\n",
+			    dest_option, protocol_version);
+			exit_cleanup(RERR_PROTOCOL);
+		}
+
+		if (prune_empty_dirs) {
+			rprintf(FERROR,
+			    "--prune-empty-dirs requires protocol 29 or higher"
+			    " (negotiated %d).\n",
+			    protocol_version);
+			exit_cleanup(RERR_PROTOCOL);
+		}
+	}
+
+	if (am_server) {
+		if (!checksum_seed)
+			checksum_seed = time(NULL);
+		write_int(f_out, checksum_seed);
+	} else {
+		checksum_seed = read_int(f_in);
+	}
 }
-
-
-
-
-void setup_protocol(void)
-{
-  if (remote_version == 10) {
-    send_file_entry = send_file_entry_v10;
-    receive_file_entry = receive_file_entry_v10;
-  } else {
-    send_file_entry = send_file_entry_v11;
-    receive_file_entry = receive_file_entry_v11;
-  }
-}
-