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/*-
* Copyright (c) 2011 Ed Schouten <ed@FreeBSD.org>
* All rights reserved.
*
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <errno.h>
#include <paths.h>
#include <stdio.h>
#include <string.h>
#define LEN_PATH_DEV (sizeof(_PATH_DEV) - 1)
char *
ctermid(char *s)
{
static char def[sizeof(_PATH_DEV) + SPECNAMELEN];
struct stat sb;
size_t dlen;
int sverrno;
if (s == NULL) {
s = def;
dlen = sizeof(def) - LEN_PATH_DEV;
} else
dlen = L_ctermid - LEN_PATH_DEV;
strcpy(s, _PATH_TTY);
/* Attempt to perform a lookup of the actual TTY pathname. */
sverrno = errno;
if (stat(_PATH_TTY, &sb) == 0 && S_ISCHR(sb.st_mode))
(void)sysctlbyname("kern.devname", s + LEN_PATH_DEV,
&dlen, &sb.st_rdev, sizeof(sb.st_rdev));
errno = sverrno;
return (s);
}
char *
ctermid_r(char *s)
{
return (s != NULL ? ctermid(s) : NULL);
}
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