1 /* $Id: client.c,v 1.4 2019/02/11 21:41:22 deraadt Exp $ */ 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 f->host == NULL ? "(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 f->host == NULL ? "(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 } 107