Annotation of src/usr.bin/rsync/fargs.c, Revision 1.13
1.13 ! benno 1: /* $Id: fargs.c,v 1.12 2019/02/16 10:48:05 florian 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 <stdint.h>
21: #include <stdlib.h>
1.9 deraadt 22: #include <string.h>
1.1 benno 23:
24: #include "extern.h"
25:
1.2 benno 26: #define RSYNC_PATH "rsync"
1.1 benno 27:
28: char **
29: fargs_cmdline(struct sess *sess, const struct fargs *f)
30: {
1.9 deraadt 31: char **args = NULL, **new;
32: size_t i = 0, n = 1, j, argsz = 0;
1.11 florian 33: char *rsync_path, *ap;
1.1 benno 34:
1.3 deraadt 35: assert(f != NULL);
1.1 benno 36: assert(f->sourcesz > 0);
37:
1.3 deraadt 38: if ((rsync_path = sess->opts->rsync_path) == NULL)
1.1 benno 39: rsync_path = RSYNC_PATH;
40:
41: /* Be explicit with array size. */
42:
1.2 benno 43: argsz += 1; /* dot separator */
44: argsz += 1; /* sink file */
45: argsz += 5; /* per-mode maximum */
1.13 ! benno 46: argsz += 15; /* shared args */
1.1 benno 47: argsz += 1; /* NULL pointer */
48: argsz += f->sourcesz;
49:
50: args = calloc(argsz, sizeof(char *));
1.9 deraadt 51: if (args == NULL)
52: goto out;
1.1 benno 53:
1.3 deraadt 54: if (f->host != NULL) {
55: assert(f->host != NULL);
1.8 benno 56:
1.11 florian 57: /*
58: * Splice arguments from -e "foo bar baz" into array
59: * elements required for execve(2).
60: * This doesn't do anything fancy: it splits along
61: * whitespace into the array.
62: */
63:
1.9 deraadt 64: if (sess->opts->ssh_prog) {
1.11 florian 65: ap = strdup(sess->opts->ssh_prog);
1.9 deraadt 66: if (ap == NULL)
67: goto out;
1.11 florian 68:
1.9 deraadt 69: while ((args[i] = strsep(&ap, " \t")) != NULL) {
70: if (args[i][0] == '\0') {
71: ap++; /* skip seperators */
72: continue;
73: }
74:
75: /* Grow command-area of array */
1.11 florian 76:
1.9 deraadt 77: if (i++ < n)
78: continue;
79: n += 10;
1.11 florian 80: new = reallocarray(args,
81: argsz + n, sizeof(char *));
1.9 deraadt 82: if (new == NULL)
83: goto out;
84: args = new;
85: argsz += n;
86: }
87: } else
88: args[i++] = "ssh";
1.11 florian 89:
1.1 benno 90: args[i++] = f->host;
1.5 deraadt 91: args[i++] = rsync_path;
1.1 benno 92: args[i++] = "--server";
1.3 deraadt 93: if (f->mode == FARGS_RECEIVER)
1.1 benno 94: args[i++] = "--sender";
95: } else {
1.5 deraadt 96: args[i++] = rsync_path;
1.1 benno 97: args[i++] = "--server";
98: }
99:
100: /* Shared arguments. */
101:
1.7 benno 102: if (sess->opts->del)
103: args[i++] = "--delete";
1.13 ! benno 104: if (sess->opts->numeric_ids)
! 105: args[i++] = "--numeric-ids";
1.7 benno 106: if (sess->opts->preserve_gids)
107: args[i++] = "-g";
108: if (sess->opts->preserve_links)
109: args[i++] = "-l";
110: if (sess->opts->dry_run)
111: args[i++] = "-n";
1.10 florian 112: if (sess->opts->preserve_uids)
113: args[i++] = "-o";
1.7 benno 114: if (sess->opts->preserve_perms)
115: args[i++] = "-p";
1.12 florian 116: if (sess->opts->devices)
117: args[i++] = "-D";
1.7 benno 118: if (sess->opts->recursive)
119: args[i++] = "-r";
120: if (sess->opts->preserve_times)
121: args[i++] = "-t";
1.1 benno 122: if (sess->opts->verbose > 3)
123: args[i++] = "-v";
124: if (sess->opts->verbose > 2)
125: args[i++] = "-v";
126: if (sess->opts->verbose > 1)
127: args[i++] = "-v";
128: if (sess->opts->verbose > 0)
129: args[i++] = "-v";
1.12 florian 130: if (sess->opts->specials && !sess->opts->devices)
131: args[i++] = "--specials";
132: if (!sess->opts->specials && sess->opts->devices)
133: /* --devices is sent as -D --no-specials */
134: args[i++] = "--no-specials";
1.1 benno 135:
136: /* Terminate with a full-stop for reasons unknown. */
137:
138: args[i++] = ".";
139:
1.3 deraadt 140: if (f->mode == FARGS_RECEIVER) {
1.1 benno 141: for (j = 0; j < f->sourcesz; j++)
142: args[i++] = f->sources[j];
143: } else
144: args[i++] = f->sink;
145:
146: args[i] = NULL;
147: return args;
1.9 deraadt 148: out:
149: free(args);
150: ERR(sess, "calloc");
151: return NULL;
1.1 benno 152: }
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