minix/usr.bin/su/suutil.c
2012-03-27 02:19:46 +02:00

63 lines
2.1 KiB
C

/* $NetBSD: suutil.c,v 1.1 2007/10/17 21:05:39 christos Exp $ */
/*
* Copyright (c) 1988 The Regents of the University of California.
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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>
__RCSID("$NetBSD: suutil.c,v 1.1 2007/10/17 21:05:39 christos Exp $");
#include <sys/param.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include "suutil.h"
int
chshell(const char *sh)
{
const char *cp;
setusershell();
while ((cp = getusershell()) != NULL)
if (strcmp(cp, sh) == 0)
return 1;
return 0;
}
char *
ontty(void)
{
char *p;
static char buf[MAXPATHLEN + 4];
buf[0] = 0;
if ((p = ttyname(STDERR_FILENO)) != NULL)
(void)snprintf(buf, sizeof buf, " on %s", p);
return buf;
}