compat.c

説明を見る。

/* 
   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.
*/

/**
 * @file compat.c
 *
 * Compatibility routines for older rsync protocol versions.
 **/

#include "rsync.h"

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 setup_protocol(int f_out,int f_in)
{
        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);
        }
}

---