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Annotation of src/usr.bin/rsync/client.c, Revision 1.1

1.1     ! benno       1: /*     $Id$ */
        !             2: /*
        !             3:  * Copyright (c) 2019 Kristaps Dzonsons <kristaps@bsd.lv>
        !             4:  *
        !             5:  * Permission to use, copy, modify, and distribute this software for any
        !             6:  * purpose with or without fee is hereby granted, provided that the above
        !             7:  * copyright notice and this permission notice appear in all copies.
        !             8:  *
        !             9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !            10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
        !            15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            16:  */
        !            17: #include <sys/stat.h>
        !            18:
        !            19: #include <assert.h>
        !            20: #include <inttypes.h>
        !            21: #include <stdlib.h>
        !            22: #include <string.h>
        !            23: #include <unistd.h>
        !            24:
        !            25: #include "extern.h"
        !            26:
        !            27: /*
        !            28:  * The rsync client runs on the operator's local machine.
        !            29:  * It can either be in sender or receiver mode.
        !            30:  * In the former, it synchronises local files from a remote sink.
        !            31:  * In the latter, the remote sink synchronses to the local files.
        !            32:  *
        !            33:  * Pledges: stdio, rpath, wpath, cpath, unveil, fattr.
        !            34:  *
        !            35:  * Pledges (dry-run): -cpath, -wpath, -fattr.
        !            36:  * Pledges (!preserve_times): -fattr.
        !            37:  */
        !            38: int
        !            39: rsync_client(const struct opts *opts, int fd, const struct fargs *f)
        !            40: {
        !            41:        struct sess      sess;
        !            42:        int              rc = 0;
        !            43:
        !            44:        /* Standard rsync preamble, sender side. */
        !            45:
        !            46:        memset(&sess, 0, sizeof(struct sess));
        !            47:        sess.opts = opts;
        !            48:        sess.lver = RSYNC_PROTOCOL;
        !            49:
        !            50:        if ( ! io_write_int(&sess, fd, sess.lver)) {
        !            51:                ERRX1(&sess, "io_write_int");
        !            52:                goto out;
        !            53:        } else if ( ! io_read_int(&sess, fd, &sess.rver)) {
        !            54:                ERRX1(&sess, "io_read_int");
        !            55:                goto out;
        !            56:        } else if ( ! io_read_int(&sess, fd, &sess.seed)) {
        !            57:                ERRX1(&sess, "io_read_int");
        !            58:                goto out;
        !            59:        }
        !            60:
        !            61:        if (sess.rver < sess.lver) {
        !            62:                ERRX(&sess, "remote protocol is older "
        !            63:                        "than our own (%" PRId32 " < %" PRId32 "): "
        !            64:                        "this is not supported",
        !            65:                        sess.rver, sess.lver);
        !            66:                goto out;
        !            67:        }
        !            68:
        !            69:        LOG2(&sess, "client detected client version %" PRId32
        !            70:                ", server version %" PRId32 ", seed %" PRId32,
        !            71:                sess.lver, sess.rver, sess.seed);
        !            72:
        !            73:        sess.mplex_reads = 1;
        !            74:
        !            75:        /*
        !            76:         * Now we need to get our list of files.
        !            77:         * Senders (and locals) send; receivers receive.
        !            78:         */
        !            79:
        !            80:        if (FARGS_RECEIVER != f->mode) {
        !            81:                LOG2(&sess, "client starting sender: %s",
        !            82:                        NULL == f->host ? "(local)" : f->host);
        !            83:                if ( ! rsync_sender(&sess, fd, fd,
        !            84:                                f->sourcesz, f->sources)) {
        !            85:                        ERRX1(&sess, "rsync_sender");
        !            86:                        goto out;
        !            87:                }
        !            88:        } else {
        !            89:                LOG2(&sess, "client starting receiver: %s",
        !            90:                        NULL == f->host ? "(local)" : f->host);
        !            91:                if ( ! rsync_receiver(&sess, fd, fd, f->sink)) {
        !            92:                        ERRX1(&sess, "rsync_receiver");
        !            93:                        goto out;
        !            94:                }
        !            95:        }
        !            96:
        !            97: #if 0
        !            98:        /* Probably the EOF. */
        !            99:        if (io_read_check(&sess, fd))
        !           100:                WARNX(&sess, "data remains in read pipe");
        !           101: #endif
        !           102:
        !           103:        rc = 1;
        !           104: out:
        !           105:        return rc;
        !           106: }