Annotation of src/usr.bin/rsync/client.c, Revision 1.17
1.17 ! claudio 1: /* $OpenBSD: client.c,v 1.16 2021/05/17 11:59:09 claudio Exp $ */
1.1 benno 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>
1.11 deraadt 24: #include <err.h>
1.1 benno 25:
26: #include "extern.h"
27:
28: /*
29: * The rsync client runs on the operator's local machine.
30: * It can either be in sender or receiver mode.
31: * In the former, it synchronises local files from a remote sink.
32: * In the latter, the remote sink synchronses to the local files.
1.13 deraadt 33: * Returns exit code 0 on success, 1 on failure, 2 on failure with
34: * incompatible protocols.
1.1 benno 35: */
36: int
37: rsync_client(const struct opts *opts, int fd, const struct fargs *f)
38: {
39: struct sess sess;
1.13 deraadt 40: int rc = 1;
1.1 benno 41:
42: /* Standard rsync preamble, sender side. */
1.11 deraadt 43:
44: if (pledge("stdio unix rpath wpath cpath dpath fattr chown getpw unveil",
45: NULL) == -1)
1.16 claudio 46: err(ERR_IPC, "pledge");
1.1 benno 47:
48: memset(&sess, 0, sizeof(struct sess));
49: sess.opts = opts;
50: sess.lver = RSYNC_PROTOCOL;
51:
1.3 deraadt 52: if (!io_write_int(&sess, fd, sess.lver)) {
1.15 benno 53: ERRX1("io_write_int");
1.1 benno 54: goto out;
1.3 deraadt 55: } else if (!io_read_int(&sess, fd, &sess.rver)) {
1.15 benno 56: ERRX1("io_read_int");
1.1 benno 57: goto out;
1.3 deraadt 58: } else if (!io_read_int(&sess, fd, &sess.seed)) {
1.15 benno 59: ERRX1("io_read_int");
1.1 benno 60: goto out;
61: }
62:
63: if (sess.rver < sess.lver) {
1.15 benno 64: ERRX("remote protocol %d is older than our own %d: unsupported",
1.13 deraadt 65: sess.rver, sess.lver);
66: rc = 2;
1.1 benno 67: goto out;
68: }
69:
1.15 benno 70: LOG2("client detected client version %d, server version %d, seed %d",
1.14 deraadt 71: sess.lver, sess.rver, sess.seed);
1.1 benno 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:
1.12 deraadt 80: if (f->mode != FARGS_RECEIVER) {
1.15 benno 81: LOG2("client starting sender: %s",
1.4 deraadt 82: f->host == NULL ? "(local)" : f->host);
1.5 deraadt 83: if (!rsync_sender(&sess, fd, fd, f->sourcesz,
84: f->sources)) {
1.15 benno 85: ERRX1("rsync_sender");
1.1 benno 86: goto out;
87: }
88: } else {
1.15 benno 89: LOG2("client starting receiver: %s",
1.4 deraadt 90: f->host == NULL ? "(local)" : f->host);
1.3 deraadt 91: if (!rsync_receiver(&sess, fd, fd, f->sink)) {
1.15 benno 92: ERRX1("rsync_receiver");
1.1 benno 93: goto out;
94: }
95: }
96:
97: #if 0
98: /* Probably the EOF. */
99: if (io_read_check(&sess, fd))
1.15 benno 100: WARNX("data remains in read pipe");
1.1 benno 101: #endif
102:
1.13 deraadt 103: rc = 0;
1.1 benno 104: out:
105: return rc;
106: }