/* $Id: child.c,v 1.1 2019/02/10 23:18:28 benno 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "extern.h"
/*
* This is run on the client machine to initiate a connection with the
* remote machine in --server mode.
* It does not return, as it executes into the remote shell.
*
* Pledges: exec, stdio.
*/
void
rsync_child(const struct opts *opts, int fd, const struct fargs *f)
{
struct sess sess;
char **args;
size_t i;
memset(&sess, 0, sizeof(struct sess));
sess.opts = opts;
/* Construct the remote shell command. */
if (NULL == (args = fargs_cmdline(&sess, f))) {
ERRX1(&sess, "fargs_cmdline");
exit(EXIT_FAILURE);
}
for (i = 0; NULL != args[i]; i++)
LOG2(&sess, "exec[%zu] = %s", i, args[i]);
/* Make sure the child's stdin is from the sender. */
if (-1 == dup2(fd, STDIN_FILENO)) {
ERR(&sess, "dup2");
exit(EXIT_FAILURE);
} if (-1 == dup2(fd, STDOUT_FILENO)) {
ERR(&sess, "dup2");
exit(EXIT_FAILURE);
}
/* Here we go... */
execvp(args[0], args);
ERR(&sess, "%s: execvp", args[0]);
exit(EXIT_FAILURE);
/* NOTREACHED */
}