Net-Dropbear

 view release on metacpan or  search on metacpan

dropbear/MULTI  view on Meta::CPAN

Multi-binary compilation
========================

To compile for systems without much space (floppy distributions etc), you
can create a single binary. This will save disk space by avoiding repeated
code between the various parts.
If you are familiar with "busybox", it's the same principle.

To compile the multi-binary, first "make clean" (if you've compiled
previously), then

make PROGRAMS="programs you want here" MULTI=1

To use the binary, symlink it from the desired executable:

ln -s dropbearmulti dropbear
ln -s dropbearmulti dbclient

dropbear/cli-session.c  view on Meta::CPAN

static void cli_session_init(pid_t proxy_cmd_pid) {

	cli_ses.state = STATE_NOTHING;
	cli_ses.kex_state = KEX_NOTHING;

	cli_ses.tty_raw_mode = 0;
	cli_ses.winchange = 0;

	/* We store std{in,out,err}'s flags, so we can set them back on exit
	 * (otherwise busybox's ash isn't happy */
	cli_ses.stdincopy = dup(STDIN_FILENO);
	cli_ses.stdinflags = fcntl(STDIN_FILENO, F_GETFL, 0);
	cli_ses.stdoutcopy = dup(STDOUT_FILENO);
	cli_ses.stdoutflags = fcntl(STDOUT_FILENO, F_GETFL, 0);
	cli_ses.stderrcopy = dup(STDERR_FILENO);
	cli_ses.stderrflags = fcntl(STDERR_FILENO, F_GETFL, 0);

	cli_ses.retval = EXIT_SUCCESS; /* Assume it's clean if we don't get a
									  specific exit status */
	cli_ses.proxy_cmd_pid = proxy_cmd_pid;

dropbear/cli-session.c  view on Meta::CPAN

}

static void cli_session_cleanup(void) {

	if (!ses.init_done) {
		return;
	}

	kill_proxy_command();

	/* Set std{in,out,err} back to non-blocking - busybox ash dies nastily if
	 * we don't revert the flags */
	/* Ignore return value since there's nothing we can do */
	(void)fcntl(cli_ses.stdincopy, F_SETFL, cli_ses.stdinflags);
	(void)fcntl(cli_ses.stdoutcopy, F_SETFL, cli_ses.stdoutflags);
	(void)fcntl(cli_ses.stderrcopy, F_SETFL, cli_ses.stderrflags);

	/* Don't leak */
	m_close(cli_ses.stdincopy);
	m_close(cli_ses.stdoutcopy);
	m_close(cli_ses.stderrcopy);

dropbear/loginrec.c  view on Meta::CPAN

  a system exists and needs support, direct analogues of the [uw]tmp
  code should suffice.

  Retrieving the time of last login ('lastlog') is in some ways even
  more problemmatic than login recording. Some systems provide a
  simple table of all users which we seek based on uid and retrieve a
  relatively standard structure. Others record the same information in
  a directory with a separate file, and others don't record the
  information separately at all. For systems in the latter category,
  we look backwards in the wtmp or wtmpx file for the last login entry
  for our user. Naturally this is slower and on busy systems could
  incur a significant performance penalty.

  Calling the new code
  --------------------

  In OpenSSH all login recording and retrieval is performed in
  login.c. Here you'll find working examples. Also, in the logintest.c
  program there are more examples.

  Internal handler calling method