5e53a4f90f
Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
118 lines
3.4 KiB
C
118 lines
3.4 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2001 Brian Somers <brian@Awfulhak.org>
|
|
* Based on original work by Atsushi Murai <amurai@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 <libutil.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
static int isDISP(const char *);
|
|
|
|
/*-
|
|
* Trim the current domain name from fullhost, but only if the result
|
|
* is less than or equal to hostsize in length.
|
|
*
|
|
* This function understands $DISPLAY type fullhosts.
|
|
*
|
|
* For example:
|
|
*
|
|
* trimdomain("abcde.my.domain", 5) -> "abcde"
|
|
* trimdomain("abcde.my.domain", 4) -> "abcde.my.domain"
|
|
* trimdomain("abcde.my.domain:0.0", 9) -> "abcde:0.0"
|
|
* trimdomain("abcde.my.domain:0.0", 8) -> "abcde.my.domain:0.0"
|
|
*/
|
|
void
|
|
trimdomain(char *fullhost, int hostsize)
|
|
{
|
|
static size_t dlen;
|
|
static int first = 1;
|
|
static char domain[MAXHOSTNAMELEN];
|
|
char *end, *s;
|
|
size_t len;
|
|
|
|
if (first) {
|
|
/* XXX: Should we assume that our domain is this persistent ? */
|
|
first = 0;
|
|
if (gethostname(domain, sizeof(domain) - 1) == 0 &&
|
|
(s = strchr(domain, '.')) != NULL)
|
|
memmove(domain, s + 1, strlen(s + 1) + 1);
|
|
else
|
|
domain[0] = '\0';
|
|
dlen = strlen(domain);
|
|
}
|
|
|
|
if (domain[0] == '\0')
|
|
return;
|
|
|
|
s = fullhost;
|
|
end = s + hostsize + 1;
|
|
if ((s = memchr(s, '.', (size_t)(end - s))) != NULL) {
|
|
if (strncasecmp(s + 1, domain, dlen) == 0) {
|
|
if (s[dlen + 1] == '\0') {
|
|
/* Found -- lose the domain. */
|
|
*s = '\0';
|
|
} else if (s[dlen + 1] == ':' &&
|
|
isDISP(s + dlen + 2) &&
|
|
(len = strlen(s + dlen + 1)) < (size_t)(end - s)) {
|
|
/* Found -- shuffle the DISPLAY back. */
|
|
memmove(s, s + dlen + 1, len + 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Is the given string NN or NN.NN where ``NN'' is an all-numeric string ?
|
|
*/
|
|
static int
|
|
isDISP(const char *disp)
|
|
{
|
|
size_t w;
|
|
int res;
|
|
|
|
w = strspn(disp, "0123456789");
|
|
res = 0;
|
|
if (w > 0) {
|
|
if (disp[w] == '\0')
|
|
res = 1; /* NN */
|
|
else if (disp[w] == '.') {
|
|
disp += w + 1;
|
|
w = strspn(disp, "0123456789");
|
|
if (w > 0 && disp[w] == '\0')
|
|
res = 1; /* NN.NN */
|
|
}
|
|
}
|
|
return (res);
|
|
}
|