File: [local] / src / usr.bin / rsync / fargs.c (download)
Revision 1.11, Thu Feb 14 18:31:36 2019 UTC (5 years, 3 months ago) by florian
Branch: MAIN
Changes since 1.10: +15 -5 lines
sync with kristaps, commit 69f69c7c7c950d42e02666ac63e3b98ec9c972ec
Document the -e splice, bring long line, put variable at top of
function block.
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/* $Id: fargs.c,v 1.11 2019/02/14 18:31:36 florian Exp $ */
/*
* Copyright (c) 2019 Kristaps Dzonsons <kristaps@bsd.lv>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/stat.h>
#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "extern.h"
#define RSYNC_PATH "rsync"
char **
fargs_cmdline(struct sess *sess, const struct fargs *f)
{
char **args = NULL, **new;
size_t i = 0, n = 1, j, argsz = 0;
char *rsync_path, *ap;
assert(f != NULL);
assert(f->sourcesz > 0);
if ((rsync_path = sess->opts->rsync_path) == NULL)
rsync_path = RSYNC_PATH;
/* Be explicit with array size. */
argsz += 1; /* dot separator */
argsz += 1; /* sink file */
argsz += 5; /* per-mode maximum */
argsz += 12; /* shared args */
argsz += 1; /* NULL pointer */
argsz += f->sourcesz;
args = calloc(argsz, sizeof(char *));
if (args == NULL)
goto out;
if (f->host != NULL) {
assert(f->host != NULL);
/*
* Splice arguments from -e "foo bar baz" into array
* elements required for execve(2).
* This doesn't do anything fancy: it splits along
* whitespace into the array.
*/
if (sess->opts->ssh_prog) {
ap = strdup(sess->opts->ssh_prog);
if (ap == NULL)
goto out;
while ((args[i] = strsep(&ap, " \t")) != NULL) {
if (args[i][0] == '\0') {
ap++; /* skip seperators */
continue;
}
/* Grow command-area of array */
if (i++ < n)
continue;
n += 10;
new = reallocarray(args,
argsz + n, sizeof(char *));
if (new == NULL)
goto out;
args = new;
argsz += n;
}
} else
args[i++] = "ssh";
args[i++] = f->host;
args[i++] = rsync_path;
args[i++] = "--server";
if (f->mode == FARGS_RECEIVER)
args[i++] = "--sender";
} else {
args[i++] = rsync_path;
args[i++] = "--server";
}
/* Shared arguments. */
if (sess->opts->del)
args[i++] = "--delete";
if (sess->opts->preserve_gids)
args[i++] = "-g";
if (sess->opts->preserve_links)
args[i++] = "-l";
if (sess->opts->dry_run)
args[i++] = "-n";
if (sess->opts->preserve_uids)
args[i++] = "-o";
if (sess->opts->preserve_perms)
args[i++] = "-p";
if (sess->opts->recursive)
args[i++] = "-r";
if (sess->opts->preserve_times)
args[i++] = "-t";
if (sess->opts->verbose > 3)
args[i++] = "-v";
if (sess->opts->verbose > 2)
args[i++] = "-v";
if (sess->opts->verbose > 1)
args[i++] = "-v";
if (sess->opts->verbose > 0)
args[i++] = "-v";
/* Terminate with a full-stop for reasons unknown. */
args[i++] = ".";
if (f->mode == FARGS_RECEIVER) {
for (j = 0; j < f->sourcesz; j++)
args[i++] = f->sources[j];
} else
args[i++] = f->sink;
args[i] = NULL;
return args;
out:
free(args);
ERR(sess, "calloc");
return NULL;
}