76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/*
|
|
* Copyright 2002 Massachusetts Institute of Technology
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software and
|
|
* its documentation for any purpose and without fee is hereby
|
|
* granted, provided that both the above copyright notice and this
|
|
* permission notice appear in all copies, that both the above
|
|
* copyright notice and this permission notice appear in all
|
|
* supporting documentation, and that the name of M.I.T. not be used
|
|
* in advertising or publicity pertaining to distribution of the
|
|
* software without specific, written prior permission. M.I.T. makes
|
|
* no representations about the suitability of this software for any
|
|
* purpose. It is provided "as is" without express or implied
|
|
* warranty.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
|
|
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
|
|
* SHALL M.I.T. 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("$FreeBSD$");
|
|
|
|
/*
|
|
* I din't use "namespace.h" here because none of the relevant utilities
|
|
* are threaded, so I'm not concerned about cancellation points or other
|
|
* niceties.
|
|
*/
|
|
#include <limits.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#ifndef LINE_MAX
|
|
#define LINE_MAX _POSIX2_LINE_MAX
|
|
#endif
|
|
|
|
#define _PATH_UTIL_COMPAT "/etc/compat-FreeBSD-4-util"
|
|
#define _ENV_UTIL_COMPAT "_COMPAT_FreeBSD_4"
|
|
|
|
int
|
|
check_utility_compat(const char *utility)
|
|
{
|
|
char buf[LINE_MAX];
|
|
char *p, *bp;
|
|
int len;
|
|
|
|
if ((p = getenv(_ENV_UTIL_COMPAT)) != NULL) {
|
|
strlcpy(buf, p, sizeof buf);
|
|
} else {
|
|
if ((len = readlink(_PATH_UTIL_COMPAT, buf, sizeof buf)) < 0)
|
|
return 0;
|
|
if (len > sizeof buf)
|
|
len = sizeof buf;
|
|
buf[len] = '\0';
|
|
}
|
|
if (buf[0] == '\0')
|
|
return 1;
|
|
|
|
bp = buf;
|
|
while ((p = strsep(&bp, ",")) != NULL) {
|
|
if (strcmp(p, utility) == 0)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|