1106065Swollman/* 2106065Swollman * Copyright 2002 Massachusetts Institute of Technology 3106065Swollman * 4106065Swollman * Permission to use, copy, modify, and distribute this software and 5106065Swollman * its documentation for any purpose and without fee is hereby 6106065Swollman * granted, provided that both the above copyright notice and this 7106065Swollman * permission notice appear in all copies, that both the above 8106065Swollman * copyright notice and this permission notice appear in all 9106065Swollman * supporting documentation, and that the name of M.I.T. not be used 10106065Swollman * in advertising or publicity pertaining to distribution of the 11106065Swollman * software without specific, written prior permission. M.I.T. makes 12106065Swollman * no representations about the suitability of this software for any 13106065Swollman * purpose. It is provided "as is" without express or implied 14106065Swollman * warranty. 15106065Swollman * 16106065Swollman * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 17106065Swollman * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 18106065Swollman * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19106065Swollman * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 20106065Swollman * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21106065Swollman * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22106065Swollman * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23106065Swollman * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24106065Swollman * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25106065Swollman * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26106065Swollman * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27106065Swollman * SUCH DAMAGE. 28106065Swollman */ 29106065Swollman 30106065Swollman#include <sys/cdefs.h> 31106065Swollman__FBSDID("$FreeBSD$"); 32106065Swollman 33114443Snectar/* 34114443Snectar * I din't use "namespace.h" here because none of the relevant utilities 35114443Snectar * are threaded, so I'm not concerned about cancellation points or other 36114443Snectar * niceties. 37114443Snectar */ 38244568Sdelphij#include <sys/limits.h> 39244568Sdelphij 40106065Swollman#include <limits.h> 41106065Swollman#include <stdlib.h> 42106065Swollman#include <string.h> 43106065Swollman#include <unistd.h> 44106065Swollman 45106065Swollman#define _PATH_UTIL_COMPAT "/etc/compat-FreeBSD-4-util" 46106065Swollman#define _ENV_UTIL_COMPAT "_COMPAT_FreeBSD_4" 47106065Swollman 48106065Swollmanint 49106065Swollmancheck_utility_compat(const char *utility) 50106065Swollman{ 51244568Sdelphij char buf[PATH_MAX]; 52106065Swollman char *p, *bp; 53106065Swollman int len; 54106065Swollman 55106065Swollman if ((p = getenv(_ENV_UTIL_COMPAT)) != NULL) { 56114443Snectar strlcpy(buf, p, sizeof buf); 57106065Swollman } else { 58244568Sdelphij if ((len = readlink(_PATH_UTIL_COMPAT, buf, sizeof(buf) - 1)) < 0) 59106065Swollman return 0; 60106065Swollman buf[len] = '\0'; 61106065Swollman } 62106065Swollman if (buf[0] == '\0') 63106065Swollman return 1; 64106065Swollman 65106065Swollman bp = buf; 66106065Swollman while ((p = strsep(&bp, ",")) != NULL) { 67106065Swollman if (strcmp(p, utility) == 0) 68106065Swollman return 1; 69106065Swollman } 70106065Swollman return 0; 71106065Swollman} 72