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https://github.com/freebsd/freebsd-src
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559a218c9b
These sys/cdefs.h are not needed. Purge them. They are mostly left-over from the $FreeBSD$ removal. A few in libc are still required for macros that cdefs.h defines. Keep those. Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D42385
69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/*
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* Copyright 2002 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* I din't use "namespace.h" here because none of the relevant utilities
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* are threaded, so I'm not concerned about cancellation points or other
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* niceties.
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*/
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#include <sys/limits.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define _PATH_UTIL_COMPAT "/etc/compat-FreeBSD-4-util"
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#define _ENV_UTIL_COMPAT "_COMPAT_FreeBSD_4"
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int
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check_utility_compat(const char *utility)
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{
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char buf[PATH_MAX];
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char *p, *bp;
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int len;
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if ((p = getenv(_ENV_UTIL_COMPAT)) != NULL) {
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strlcpy(buf, p, sizeof buf);
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} else {
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if ((len = readlink(_PATH_UTIL_COMPAT, buf, sizeof(buf) - 1)) < 0)
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return 0;
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buf[len] = '\0';
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}
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if (buf[0] == '\0')
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return 1;
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bp = buf;
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while ((p = strsep(&bp, ",")) != NULL) {
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if (strcmp(p, utility) == 0)
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return 1;
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}
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return 0;
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}
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