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/* $OpenBSD: client.c,v 1.17 2021/06/30 13:10:04 claudio Exp $ */
/*
* Copyright (c) 2019 Kristaps Dzonsons <kristaps@bsd.lv>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/stat.h>
#include <assert.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <err.h>
#include "extern.h"
/*
* The rsync client runs on the operator's local machine.
* It can either be in sender or receiver mode.
* In the former, it synchronises local files from a remote sink.
* In the latter, the remote sink synchronses to the local files.
* Returns exit code 0 on success, 1 on failure, 2 on failure with
* incompatible protocols.
*/
int
rsync_client(const struct opts *opts, int fd, const struct fargs *f)
{
struct sess sess;
int rc = 1;
/* Standard rsync preamble, sender side. */
if (pledge("stdio unix rpath wpath cpath dpath fattr chown getpw unveil",
NULL) == -1)
err(ERR_IPC, "pledge");
memset(&sess, 0, sizeof(struct sess));
sess.opts = opts;
sess.lver = RSYNC_PROTOCOL;
if (!io_write_int(&sess, fd, sess.lver)) {
ERRX1("io_write_int");
goto out;
} else if (!io_read_int(&sess, fd, &sess.rver)) {
ERRX1("io_read_int");
goto out;
} else if (!io_read_int(&sess, fd, &sess.seed)) {
ERRX1("io_read_int");
goto out;
}
if (sess.rver < sess.lver) {
ERRX("remote protocol %d is older than our own %d: unsupported",
sess.rver, sess.lver);
rc = 2;
goto out;
}
LOG2("client detected client version %d, server version %d, seed %d",
sess.lver, sess.rver, sess.seed);
sess.mplex_reads = 1;
/*
* Now we need to get our list of files.
* Senders (and locals) send; receivers receive.
*/
if (f->mode != FARGS_RECEIVER) {
LOG2("client starting sender: %s",
f->host == NULL ? "(local)" : f->host);
if (!rsync_sender(&sess, fd, fd, f->sourcesz,
f->sources)) {
ERRX1("rsync_sender");
goto out;
}
} else {
LOG2("client starting receiver: %s",
f->host == NULL ? "(local)" : f->host);
if (!rsync_receiver(&sess, fd, fd, f->sink)) {
ERRX1("rsync_receiver");
goto out;
}
}
#if 0
/* Probably the EOF. */
if (io_read_check(&sess, fd))
WARNX("data remains in read pipe");
#endif
rc = 0;
out:
return rc;
}
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