xref: /freebsd-11-stable/crypto/openssh/openbsd-compat/bsd-cygwin_util.c

/*
 * Copyright (c) 2000, 2001, 2011, 2013 Corinna Vinschen <vinschen@redhat.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Created: Sat Sep 02 12:17:00 2000 cv
 *
 * This file contains functions for forcing opened file descriptors to
 * binary mode on Windows systems.
 */

#define NO_BINARY_OPEN	/* Avoid redefining open to binary_open for this file */
#include "includes.h"

#ifdef HAVE_CYGWIN

#include <sys/types.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>

#include "xmalloc.h"

int
binary_open(const char *filename, int flags, ...)
{
	va_list ap;
	mode_t mode;

	va_start(ap, flags);
	mode = va_arg(ap, mode_t);
	va_end(ap);
	return (open(filename, flags | O_BINARY, mode));
}

int
check_ntsec(const char *filename)
{
	return (pathconf(filename, _PC_POSIX_PERMISSIONS));
}

const char *
cygwin_ssh_privsep_user()
{
  static char cyg_privsep_user[DNLEN + UNLEN + 2];

  if (!cyg_privsep_user[0])
    {
#ifdef CW_CYGNAME_FROM_WINNAME
      if (cygwin_internal (CW_CYGNAME_FROM_WINNAME, "sshd", cyg_privsep_user,
			   sizeof cyg_privsep_user) != 0)
#endif
	strlcpy(cyg_privsep_user, "sshd", sizeof(cyg_privsep_user));
    }
  return cyg_privsep_user;
}

#define NL(x) x, (sizeof (x) - 1)
#define WENV_SIZ (sizeof (wenv_arr) / sizeof (wenv_arr[0]))

static struct wenv {
	const char *name;
	size_t namelen;
} wenv_arr[] = {
	{ NL("ALLUSERSPROFILE=") },
	{ NL("COMPUTERNAME=") },
	{ NL("COMSPEC=") },
	{ NL("CYGWIN=") },
	{ NL("OS=") },
	{ NL("PATH=") },
	{ NL("PATHEXT=") },
	{ NL("PROGRAMFILES=") },
	{ NL("SYSTEMDRIVE=") },
	{ NL("SYSTEMROOT=") },
	{ NL("WINDIR=") }
};

char **
fetch_windows_environment(void)
{
	char **e, **p;
	unsigned int i, idx = 0;

	p = xcalloc(WENV_SIZ + 1, sizeof(char *));
	for (e = environ; *e != NULL; ++e) {
		for (i = 0; i < WENV_SIZ; ++i) {
			if (!strncmp(*e, wenv_arr[i].name, wenv_arr[i].namelen))
				p[idx++] = *e;
		}
	}
	p[idx] = NULL;
	return p;
}

void
free_windows_environment(char **p)
{
	free(p);
}

#endif /* HAVE_CYGWIN */