1 /* $OpenBSD: fargs.c,v 1.26 2023/11/27 11:30:49 claudio 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 <err.h>
21 #include <stdint.h>
22 #include <stdlib.h>
23 #include <string.h>
24
25 #include "extern.h"
26
27 #define RSYNC_PATH "rsync"
28
29 const char *
alt_base_mode(int mode)30 alt_base_mode(int mode)
31 {
32 switch (mode) {
33 case BASE_MODE_COMPARE:
34 return "--compare-dest";
35 case BASE_MODE_COPY:
36 return "--copy-dest";
37 case BASE_MODE_LINK:
38 return "--link-dest";
39 default:
40 errx(1, "unknown base mode %d", mode);
41 }
42 }
43
44 char **
fargs_cmdline(struct sess * sess,const struct fargs * f,size_t * skip)45 fargs_cmdline(struct sess *sess, const struct fargs *f, size_t *skip)
46 {
47 arglist args;
48 size_t j;
49 char *rsync_path, *ap, *arg;
50
51 memset(&args, 0, sizeof args);
52
53 assert(f != NULL);
54 assert(f->sourcesz > 0);
55
56 if ((rsync_path = sess->opts->rsync_path) == NULL)
57 rsync_path = RSYNC_PATH;
58
59 if (f->host != NULL) {
60 /*
61 * Splice arguments from -e "foo bar baz" into array
62 * elements required for execve(2).
63 * This doesn't do anything fancy: it splits along
64 * whitespace into the array.
65 */
66
67 if (sess->opts->ssh_prog) {
68 ap = strdup(sess->opts->ssh_prog);
69 if (ap == NULL)
70 err(ERR_NOMEM, NULL);
71
72 while ((arg = strsep(&ap, " \t")) != NULL) {
73 if (arg[0] == '\0') {
74 ap++; /* skip separators */
75 continue;
76 }
77
78 addargs(&args, "%s", arg);
79 }
80 } else
81 addargs(&args, "ssh");
82
83 addargs(&args, "%s", f->host);
84 addargs(&args, "%s", rsync_path);
85 if (skip)
86 *skip = args.num;
87 addargs(&args, "--server");
88 if (f->mode == FARGS_RECEIVER)
89 addargs(&args, "--sender");
90 } else {
91 addargs(&args, "%s", rsync_path);
92 addargs(&args, "--server");
93 }
94
95 /* Shared arguments. */
96
97 if (sess->opts->del)
98 addargs(&args, "--delete");
99 if (sess->opts->numeric_ids)
100 addargs(&args, "--numeric-ids");
101 if (sess->opts->preserve_gids)
102 addargs(&args, "-g");
103 if (sess->opts->preserve_links)
104 addargs(&args, "-l");
105 if (sess->opts->dry_run)
106 addargs(&args, "-n");
107 if (sess->opts->preserve_uids)
108 addargs(&args, "-o");
109 if (sess->opts->preserve_perms)
110 addargs(&args, "-p");
111 if (sess->opts->devices)
112 addargs(&args, "-D");
113 if (sess->opts->recursive)
114 addargs(&args, "-r");
115 if (sess->opts->preserve_times)
116 addargs(&args, "-t");
117 if (sess->opts->ignore_times)
118 addargs(&args, "-I");
119 if (verbose > 3)
120 addargs(&args, "-v");
121 if (verbose > 2)
122 addargs(&args, "-v");
123 if (verbose > 1)
124 addargs(&args, "-v");
125 if (verbose > 0)
126 addargs(&args, "-v");
127 if (sess->opts->one_file_system > 1)
128 addargs(&args, "-x");
129 if (sess->opts->one_file_system > 0)
130 addargs(&args, "-x");
131 if (sess->opts->specials && !sess->opts->devices)
132 addargs(&args, "--specials");
133 if (!sess->opts->specials && sess->opts->devices)
134 /* --devices is sent as -D --no-specials */
135 addargs(&args, "--no-specials");
136 if (sess->opts->max_size >= 0)
137 addargs(&args, "--max-size=%lld", sess->opts->max_size);
138 if (sess->opts->min_size >= 0)
139 addargs(&args, "--min-size=%lld", sess->opts->min_size);
140
141 /* extra options for the receiver (local is sender) */
142 if (f->mode == FARGS_SENDER) {
143 if (sess->opts->ignore_dir_times)
144 addargs(&args, "-O");
145 if (sess->opts->ignore_link_times)
146 addargs(&args, "-J");
147 if (sess->opts->size_only)
148 addargs(&args, "--size-only");
149
150 /* only add --compare-dest, etc if this is the sender */
151 if (sess->opts->alt_base_mode != 0) {
152 for (j = 0; j < MAX_BASEDIR; j++) {
153 if (sess->opts->basedir[j] == NULL)
154 break;
155 addargs(&args, "%s=%s",
156 alt_base_mode(sess->opts->alt_base_mode),
157 sess->opts->basedir[j]);
158 }
159 }
160 }
161
162 /* Terminate with a full-stop for reasons unknown. */
163
164 addargs(&args, ".");
165
166 if (f->mode == FARGS_RECEIVER) {
167 for (j = 0; j < f->sourcesz; j++)
168 addargs(&args, "%s", f->sources[j]);
169 } else
170 addargs(&args, "%s", f->sink);
171
172 return args.list;
173 }
174