/*
* Compatibility routines for older rsync protocol versions.
*
* Copyright (C) Andrew Tridgell 1996
* Copyright (C) Paul Mackerras 1996
* Copyright (C) 2004-2020 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 3 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, visit the http://fsf.org website.
*/
#include "rsync.h"
#include "itypes.h"
extern int am_server;
extern int am_sender;
extern int local_server;
extern int inplace;
extern int recurse;
extern int use_qsort;
extern int allow_inc_recurse;
extern int preallocate_files;
extern int append_mode;
extern int fuzzy_basis;
extern int read_batch;
extern int write_batch;
extern int delay_updates;
extern int checksum_seed;
extern int basis_dir_cnt;
extern int prune_empty_dirs;
extern int protocol_version;
extern int detect_renamed;
extern int protect_args;
extern int preserve_uid;
extern int preserve_gid;
extern int preserve_atimes;
extern int preserve_crtimes;
extern int preserve_acls;
extern int preserve_xattrs;
extern int preserve_fileflags;
extern int xfer_flags_as_varint;
extern int need_messages_from_generator;
extern int delete_mode, delete_before, delete_during, delete_after;
extern int do_compression;
extern int do_compression_level;
extern char *shell_cmd;
extern char *partial_dir;
extern char *files_from;
extern char *filesfrom_host;
extern const char *checksum_choice;
extern const char *compress_choice;
extern filter_rule_list filter_list;
extern int need_unsorted_flist;
#ifdef ICONV_OPTION
extern iconv_t ic_send, ic_recv;
extern char *iconv_opt;
#endif
extern struct name_num_obj valid_checksums;
int remote_protocol = 0;
int file_extra_cnt = 0; /* count of file-list extras that everyone gets */
int inc_recurse = 0;
int compat_flags = 0;
int use_safe_inc_flist = 0;
int want_xattr_optim = 0;
int proper_seed_order = 0;
int inplace_partial = 0;
int do_negotiated_strings = 0;
int xmit_id0_names = 0;
/* These index values are for the file-list's extra-attribute array. */
int pathname_ndx, depth_ndx, atimes_ndx, crtimes_ndx, uid_ndx, gid_ndx, fileflags_ndx, acls_ndx, xattrs_ndx, unsort_ndx;
int receiver_symlink_times = 0; /* receiver can set the time on a symlink */
int sender_symlink_iconv = 0; /* sender should convert symlink content */
#ifdef ICONV_OPTION
int filesfrom_convert = 0;
#endif
#define MAX_NSTR_STRLEN 256
struct name_num_obj valid_compressions = {
"compress", NULL, NULL, 0, 0, {
#ifdef SUPPORT_ZSTD
{ CPRES_ZSTD, "zstd", NULL },
#endif
#ifdef SUPPORT_LZ4
{ CPRES_LZ4, "lz4", NULL },
#endif
{ CPRES_ZLIBX, "zlibx", NULL },
{ CPRES_ZLIB, "zlib", NULL },
{ CPRES_NONE, "none", NULL },
{ 0, NULL, NULL }
}
};
#define CF_INC_RECURSE (1<<0)
#define CF_SYMLINK_TIMES (1<<1)
#define CF_SYMLINK_ICONV (1<<2)
#define CF_SAFE_FLIST (1<<3)
#define CF_AVOID_XATTR_OPTIM (1<<4)
#define CF_CHKSUM_SEED_FIX (1<<5)
#define CF_INPLACE_PARTIAL_DIR (1<<6)
#define CF_VARINT_FLIST_FLAGS (1<<7)
#define CF_ID0_NAMES (1<<8)
static const char *client_info;
/* The server makes sure that if either side only supports a pre-release
* version of a protocol, that both sides must speak a compatible version
* of that protocol for it to be advertised as available. */
static void check_sub_protocol(void)
{
char *dot;
int their_protocol, their_sub;
#if SUBPROTOCOL_VERSION != 0
int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
#else
int our_sub = 0;
#endif
/* client_info starts with VER.SUB string if client is a pre-release. */
if (!(their_protocol = atoi(client_info))
|| !(dot = strchr(client_info, '.'))
|| !(their_sub = atoi(dot+1))) {
#if SUBPROTOCOL_VERSION != 0
if (our_sub)
protocol_version--;
#endif
return;
}
if (their_protocol < protocol_version) {
if (their_sub)
protocol_version = their_protocol - 1;
return;
}
if (their_protocol > protocol_version)
their_sub = 0; /* 0 == final version of older protocol */
if (their_sub != our_sub)
protocol_version--;
}
void set_allow_inc_recurse(void)
{
client_info = shell_cmd ? shell_cmd : "";
if (!recurse || use_qsort)
allow_inc_recurse = 0;
else if (!am_sender
&& (delete_before || delete_after
|| detect_renamed
|| delay_updates || prune_empty_dirs))
allow_inc_recurse = 0;
else if (am_server && !local_server
&& (strchr(client_info, 'i') == NULL))
allow_inc_recurse = 0;
}
void parse_compress_choice(int final_call)
{
if (valid_compressions.negotiated_name)
do_compression = valid_compressions.negotiated_num;
else if (compress_choice) {
struct name_num_item *nni = get_nni_by_name(&valid_compressions, compress_choice, -1);
if (!nni) {
rprintf(FERROR, "unknown compress name: %s\n", compress_choice);
exit_cleanup(RERR_UNSUPPORTED);
}
do_compression = nni->num;
if (am_server)
validate_choice_vs_env(NSTR_COMPRESS, do_compression, -1);
} else if (do_compression)
do_compression = CPRES_ZLIB;
else
do_compression = CPRES_NONE;
if (do_compression != CPRES_NONE && final_call)
init_compression_level(); /* There's a chance this might turn compression off! */
if (do_compression == CPRES_NONE)
compress_choice = NULL;
/* Snag the compression name for both write_batch's option output & the following debug output. */
if (valid_compressions.negotiated_name)
compress_choice = valid_compressions.negotiated_name;
else if (compress_choice == NULL) {
struct name_num_item *nni = get_nni_by_num(&valid_compressions, do_compression);
compress_choice = nni ? nni->name : "UNKNOWN";
}
if (final_call && DEBUG_GTE(NSTR, am_server ? 3 : 1)
&& (do_compression != CPRES_NONE || do_compression_level != CLVL_NOT_SPECIFIED)) {
rprintf(FINFO, "%s%s compress: %s (level %d)\n",
am_server ? "Server" : "Client",
valid_compressions.negotiated_name ? " negotiated" : "",
compress_choice, do_compression_level);
}
}
struct name_num_item *get_nni_by_name(struct name_num_obj *nno, const char *name, int len)
{
struct name_num_item *nni;
if (len < 0)
len = strlen(name);
for (nni = nno->list; nni->name; nni++) {
if (strncasecmp(name, nni->name, len) == 0 && nni->name[len] == '\0')
return nni;
}
return NULL;
}
struct name_num_item *get_nni_by_num(struct name_num_obj *nno, int num)
{
struct name_num_item *nni;
for (nni = nno->list; nni->name; nni++) {
if (num == nni->num)
return nni;
}
return NULL;
}
static void init_nno_saw(struct name_num_obj *nno, int val)
{
struct name_num_item *nni;
int cnt;
if (!nno->saw_len) {
for (nni = nno->list; nni->name; nni++) {
if (nni->num >= nno->saw_len)
nno->saw_len = nni->num + 1;
}
}
if (!nno->saw) {
nno->saw = new_array0(uchar, nno->saw_len);
/* We'll take this opportunity to make sure that the main_name values are set right. */
for (cnt = 1, nni = nno->list; nni->name; nni++, cnt++) {
if (nno->saw[nni->num])
nni->main_name = nno->list[nno->saw[nni->num]-1].name;
else
nno->saw[nni->num] = cnt;
}
}
memset(nno->saw, val, nno->saw_len);
}
/* Simplify the user-provided string so that it contains valid names without any duplicates.
* It also sets the "saw" flags to a 1-relative count of which name was seen first. */
static int parse_nni_str(struct name_num_obj *nno, const char *from, char *tobuf, int tobuf_len)
{
char *to = tobuf, *tok = NULL;
int saw_tok = 0, cnt = 0;
while (1) {
int at_space = isSpace(from);
char ch = *from++;
if (ch == '&')
ch = '\0';
if (!ch || at_space) {
if (tok) {
struct name_num_item *nni = get_nni_by_name(nno, tok, to - tok);
if (nni && !nno->saw[nni->num]) {
nno->saw[nni->num] = ++cnt;
if (nni->main_name) {
to = tok + strlcpy(tok, nni->main_name, tobuf_len - (tok - tobuf));
if (to - tobuf >= tobuf_len) {
to = tok - 1;
break;
}
}
} else
to = tok - (tok != tobuf);
saw_tok = 1;
tok = NULL;
}
if (!ch)
break;
continue;
}
if (!tok) {
if (to != tobuf)
*to++ = ' ';
tok = to;
}
if (to - tobuf >= tobuf_len - 1) {
to = tok - (tok != tobuf);
break;
}
*to++ = ch;
}
*to = '\0';
if (saw_tok && to == tobuf)
return strlcpy(tobuf, "INVALID", MAX_NSTR_STRLEN);
return to - tobuf;
}
/* This routine is always called with a tmpbuf of MAX_NSTR_STRLEN length, but the
* buffer may be pre-populated with a "len" length string to use OR a len of -1
* to tell us to read a string from the fd. */
static void recv_negotiate_str(int f_in, struct name_num_obj *nno, char *tmpbuf, int len)
{
struct name_num_item *ret = NULL;
if (len < 0)
len = read_vstring(f_in, tmpbuf, MAX_NSTR_STRLEN);
if (DEBUG_GTE(NSTR, am_server ? 3 : 2)) {
if (am_server)
rprintf(FINFO, "Client %s list (on server): %s\n", nno->type, tmpbuf);
else
rprintf(FINFO, "Server %s list (on client): %s\n", nno->type, tmpbuf);
}
if (len > 0) {
struct name_num_item *nni;
int best = nno->saw_len; /* We want best == 1 from the client list, so start with a big number. */
char *space, *tok = tmpbuf;
while (tok) {
while (*tok == ' ') tok++; /* Should be unneeded... */
if (!*tok)
break;
if ((space = strchr(tok, ' ')) != NULL)
*space = '\0';
nni = get_nni_by_name(nno, tok, -1);
if (space) {
*space = ' ';
tok = space + 1;
} else
tok = NULL;
if (!nni || !nno->saw[nni->num] || best <= nno->saw[nni->num])
continue;
ret = nni;
best = nno->saw[nni->num];
if (best == 1 || am_server) /* The server side stops at the first acceptable client choice */
break;
}
if (ret) {
free(nno->saw);
nno->saw = NULL;
nno->negotiated_name = ret->main_name ? ret->main_name : ret->name;
nno->negotiated_num = ret->num;
return;
}
}
if (!am_server || !do_negotiated_strings) {
char *cp = tmpbuf;
int j;
rprintf(FERROR, "Failed to negotiate a %s choice.\n", nno->type);
rprintf(FERROR, "%s list: %s\n", am_server ? "Client" : "Server", tmpbuf);
/* Recreate our original list from the saw values. This can't overflow our huge
* buffer because we don't have enough valid entries to get anywhere close. */
for (j = 1, *cp = '\0'; j <= nno->saw_len; j++) {
struct name_num_item *nni;
for (nni = nno->list; nni->name; nni++) {
if (nno->saw[nni->num] == j) {
*cp++ = ' ';
cp += strlcpy(cp, nni->name, MAX_NSTR_STRLEN - (cp - tmpbuf));
break;
}
}
}
if (!*tmpbuf)
strlcpy(cp, " INVALID", MAX_NSTR_STRLEN);
rprintf(FERROR, "%s list:%s\n", am_server ? "Server" : "Client", tmpbuf);
}
exit_cleanup(RERR_UNSUPPORTED);
}
static const char *getenv_nstr(int ntype)
{
const char *env_str = getenv(ntype == NSTR_COMPRESS ? "RSYNC_COMPRESS_LIST" : "RSYNC_CHECKSUM_LIST");
/* When writing a batch file, we always negotiate an old-style choice. */
if (write_batch)
env_str = ntype == NSTR_COMPRESS ? "zlib" : protocol_version >= 30 ? "md5" : "md4";
if (am_server && env_str) {
char *cp = strchr(env_str, '&');
if (cp)
env_str = cp + 1;
}
return env_str;
}
void validate_choice_vs_env(int ntype, int num1, int num2)
{
struct name_num_obj *nno = ntype == NSTR_COMPRESS ? &valid_compressions : &valid_checksums;
const char *list_str = getenv_nstr(ntype);
char tmpbuf[MAX_NSTR_STRLEN];
if (!list_str)
return;
while (isSpace(list_str)) list_str++;
if (!*list_str)
return;
init_nno_saw(nno, 0);
parse_nni_str(nno, list_str, tmpbuf, MAX_NSTR_STRLEN);
if (ntype == NSTR_CHECKSUM) /* If "md4" is in the env list, all the old MD4 choices are OK too. */
nno->saw[CSUM_MD4_ARCHAIC] = nno->saw[CSUM_MD4_BUSTED] = nno->saw[CSUM_MD4_OLD] = nno->saw[CSUM_MD4];
if (!nno->saw[num1] || (num2 >= 0 && !nno->saw[num2])) {
rprintf(FERROR, "Your --%s-choice value (%s) was refused by the server.\n",
ntype == NSTR_COMPRESS ? "compress" : "checksum",
ntype == NSTR_COMPRESS ? compress_choice : checksum_choice);
exit_cleanup(RERR_UNSUPPORTED);
}
free(nno->saw);
nno->saw = NULL;
}
/* The saw buffer is initialized and used to store ordinal values from 1 to N
* for the order of the args in the array. If dup_markup == '\0', duplicates
* are removed otherwise the char is prefixed to the duplicate term and, if it
* is an opening paren/bracket/brace, the matching closing char is suffixed.
* "none" is removed on the client side unless dup_markup != '\0'. */
int get_default_nno_list(struct name_num_obj *nno, char *to_buf, int to_buf_len, char dup_markup)
{
struct name_num_item *nni;
int len = 0, cnt = 0;
char delim = '\0', post_delim;
switch (dup_markup) {
case '(': post_delim = ')'; break;
case '[': post_delim = ']'; break;
case '{': post_delim = '}'; break;
default: post_delim = '\0'; break;
}
init_nno_saw(nno, 0);
for (nni = nno->list, len = 0; nni->name; nni++) {
if (nni->main_name) {
if (!dup_markup)
continue;
delim = dup_markup;
}
if (nni->num == 0 && !am_server && !dup_markup)
continue;
if (len)
to_buf[len++]= ' ';
if (delim) {
to_buf[len++]= delim;
delim = post_delim;
}
len += strlcpy(to_buf+len, nni->name, to_buf_len - len);
if (len >= to_buf_len - 3)
exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE... */
if (delim) {
to_buf[len++]= delim;
delim = '\0';
}
nno->saw[nni->num] = ++cnt;
}
return len;
}
static void send_negotiate_str(int f_out, struct name_num_obj *nno, int ntype)
{
char tmpbuf[MAX_NSTR_STRLEN];
const char *list_str = getenv_nstr(ntype);
int len;
if (list_str && *list_str) {
init_nno_saw(nno, 0);
len = parse_nni_str(nno, list_str, tmpbuf, MAX_NSTR_STRLEN);
list_str = tmpbuf;
} else
list_str = NULL;
if (!list_str || !*list_str)
len = get_default_nno_list(nno, tmpbuf, MAX_NSTR_STRLEN, '\0');
if (DEBUG_GTE(NSTR, am_server ? 3 : 2)) {
if (am_server)
rprintf(FINFO, "Server %s list (on server): %s\n", nno->type, tmpbuf);
else
rprintf(FINFO, "Client %s list (on client): %s\n", nno->type, tmpbuf);
}
/* Each side sends their list of valid names to the other side and then both sides
* pick the first name in the client's list that is also in the server's list. */
if (do_negotiated_strings)
write_vstring(f_out, tmpbuf, len);
}
static void negotiate_the_strings(int f_in, int f_out)
{
/* We send all the negotiation strings before we start to read them to help avoid a slow startup. */
if (!checksum_choice)
send_negotiate_str(f_out, &valid_checksums, NSTR_CHECKSUM);
if (do_compression && !compress_choice)
send_negotiate_str(f_out, &valid_compressions, NSTR_COMPRESS);
if (valid_checksums.saw) {
char tmpbuf[MAX_NSTR_STRLEN];
int len;
if (do_negotiated_strings)
len = -1;
else
len = strlcpy(tmpbuf, protocol_version >= 30 ? "md5" : "md4", MAX_NSTR_STRLEN);
recv_negotiate_str(f_in, &valid_checksums, tmpbuf, len);
}
if (valid_compressions.saw) {
char tmpbuf[MAX_NSTR_STRLEN];
int len;
if (do_negotiated_strings)
len = -1;
else
len = strlcpy(tmpbuf, "zlib", MAX_NSTR_STRLEN);
recv_negotiate_str(f_in, &valid_compressions, tmpbuf, len);
}
/* If the other side is too old to negotiate, the above steps just made sure that
* the env didn't disallow the old algorithm. Mark things as non-negotiated. */
if (!do_negotiated_strings)
valid_checksums.negotiated_name = valid_compressions.negotiated_name = NULL;
}
void setup_protocol(int f_out,int f_in)
{
assert(file_extra_cnt == 0);
assert(EXTRA64_CNT == 2 || EXTRA64_CNT == 1);
/* All int64 values must be set first so that they are guaranteed to be
* aligned for direct int64-pointer memory access. */
if (preserve_atimes)
atimes_ndx = (file_extra_cnt += EXTRA64_CNT);
if (preserve_crtimes)
crtimes_ndx = (file_extra_cnt += EXTRA64_CNT);
if (am_sender) /* This is most likely in the in64 union as well. */
pathname_ndx = (file_extra_cnt += PTR_EXTRA_CNT);
else
depth_ndx = ++file_extra_cnt;
if (preserve_uid)
uid_ndx = ++file_extra_cnt;
if (preserve_gid)
gid_ndx = ++file_extra_cnt;
if (preserve_fileflags || (force_change && !am_sender))
fileflags_ndx = ++file_extra_cnt;
if (preserve_acls && !am_sender)
acls_ndx = ++file_extra_cnt;
if (preserve_xattrs)
xattrs_ndx = ++file_extra_cnt;
if (am_server)
set_allow_inc_recurse();
if (remote_protocol == 0) {
if (am_server && !local_server)
check_sub_protocol();
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 (DEBUG_GTE(PROTO, 1)) {
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 (read_batch)
check_batch_flags();
#ifndef SUPPORT_PREALLOCATION
if (preallocate_files && !am_sender) {
rprintf(FERROR, "preallocation is not supported on this %s\n",
am_server ? "Server" : "Client");
exit_cleanup(RERR_SYNTAX);
}
#endif
if (protocol_version < 30) {
if (append_mode == 1)
append_mode = 2;
if (preserve_acls && !local_server) {
rprintf(FERROR,
"--acls requires protocol 30 or higher"
" (negotiated %d).\n",
protocol_version);
exit_cleanup(RERR_PROTOCOL);
}
if (preserve_xattrs && !local_server) {
rprintf(FERROR,
"--xattrs requires protocol 30 or higher"
" (negotiated %d).\n",
protocol_version);
exit_cleanup(RERR_PROTOCOL);
}
}
if (delete_mode && !(delete_before+delete_during+delete_after)) {
if (protocol_version < 30)
delete_before = 1;
else
delete_during = 1;
}
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",
alt_dest_opt(0), 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",
alt_dest_opt(0), 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);
}
} else if (protocol_version >= 30) {
if (am_server) {
compat_flags = allow_inc_recurse ? CF_INC_RECURSE : 0;
#ifdef CAN_SET_SYMLINK_TIMES
compat_flags |= CF_SYMLINK_TIMES;
#endif
#ifdef ICONV_OPTION
compat_flags |= CF_SYMLINK_ICONV;
#endif
if (local_server || strchr(client_info, 'f') != NULL)
compat_flags |= CF_SAFE_FLIST;
if (local_server || strchr(client_info, 'x') != NULL)
compat_flags |= CF_AVOID_XATTR_OPTIM;
if (local_server || strchr(client_info, 'C') != NULL)
compat_flags |= CF_CHKSUM_SEED_FIX;
if (local_server || strchr(client_info, 'I') != NULL)
compat_flags |= CF_INPLACE_PARTIAL_DIR;
if (local_server || strchr(client_info, 'u') != NULL)
compat_flags |= CF_ID0_NAMES;
if (local_server || strchr(client_info, 'v') != NULL) {
do_negotiated_strings = 1;
compat_flags |= CF_VARINT_FLIST_FLAGS;
}
if (strchr(client_info, 'V') != NULL) { /* Support a pre-release 'V' that got superseded */
if (!write_batch)
compat_flags |= CF_VARINT_FLIST_FLAGS;
write_byte(f_out, compat_flags);
} else
write_varint(f_out, compat_flags);
} else { /* read_varint() is compatible with the older write_byte() when the 0x80 bit isn't on. */
compat_flags = read_varint(f_in);
if (compat_flags & CF_VARINT_FLIST_FLAGS)
do_negotiated_strings = 1;
}
/* The inc_recurse var MUST be set to 0 or 1. */
inc_recurse = compat_flags & CF_INC_RECURSE ? 1 : 0;
want_xattr_optim = protocol_version >= 31 && !(compat_flags & CF_AVOID_XATTR_OPTIM);
proper_seed_order = compat_flags & CF_CHKSUM_SEED_FIX ? 1 : 0;
xfer_flags_as_varint = compat_flags & CF_VARINT_FLIST_FLAGS ? 1 : 0;
xmit_id0_names = compat_flags & CF_ID0_NAMES ? 1 : 0;
if (!xfer_flags_as_varint && preserve_crtimes) {
fprintf(stderr, "Both rsync versions must be at least 3.2.0 for --crtimes.\n");
exit_cleanup(RERR_PROTOCOL);
}
if (!xfer_flags_as_varint && preserve_fileflags) {
fprintf(stderr, "Both rsync versions must be at least 3.2.0 for --fileflags.\n");
exit_cleanup(RERR_PROTOCOL);
}
if (am_sender) {
receiver_symlink_times = am_server
? strchr(client_info, 'L') != NULL
: !!(compat_flags & CF_SYMLINK_TIMES);
}
#ifdef CAN_SET_SYMLINK_TIMES
else
receiver_symlink_times = 1;
#endif
#ifdef ICONV_OPTION
sender_symlink_iconv = iconv_opt && (am_server
? local_server || strchr(client_info, 's') != NULL
: !!(compat_flags & CF_SYMLINK_ICONV));
#endif
if (inc_recurse && !allow_inc_recurse) {
/* This should only be able to happen in a batch. */
fprintf(stderr,
"Incompatible options specified for inc-recursive %s.\n",
read_batch ? "batch file" : "connection");
exit_cleanup(RERR_SYNTAX);
}
use_safe_inc_flist = (compat_flags & CF_SAFE_FLIST) || protocol_version >= 31;
need_messages_from_generator = 1;
if (compat_flags & CF_INPLACE_PARTIAL_DIR)
inplace_partial = 1;
#ifdef CAN_SET_SYMLINK_TIMES
} else if (!am_sender) {
receiver_symlink_times = 1;
#endif
}
if (read_batch)
do_negotiated_strings = 0;
if (need_unsorted_flist && (!am_sender || inc_recurse))
unsort_ndx = ++file_extra_cnt;
if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
int rflags = FILTRULE_NO_PREFIXES | FILTRULE_DIRECTORY;
if (!am_sender || protocol_version >= 30)
rflags |= FILTRULE_PERISHABLE;
parse_filter_str(&filter_list, partial_dir, rule_template(rflags), 0);
}
#ifdef ICONV_OPTION
if (protect_args && files_from) {
if (am_sender)
filesfrom_convert = filesfrom_host && ic_send != (iconv_t)-1;
else
filesfrom_convert = !filesfrom_host && ic_recv != (iconv_t)-1;
}
#endif
negotiate_the_strings(f_in, f_out);
if (am_server) {
if (!checksum_seed)
checksum_seed = time(NULL) ^ (getpid() << 6);
write_int(f_out, checksum_seed);
} else {
checksum_seed = read_int(f_in);
}
parse_checksum_choice(1); /* Sets checksum_type & xfersum_type */
parse_compress_choice(1); /* Sets do_compression */
if (write_batch && !am_server)
write_batch_shell_file();
init_flist();
}
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