d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Actually commit the new version of trimdomain *blush*

Browse Source 
Thanks for covering my blunder to:	peter
This commit is contained in:
brian 2001-03-15 08:30:05 +00:00
parent 63f7af882b
commit bb83c51dcc
1 changed files with 80 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

150
lib/libutil/trimdomain.c
View File

@ -1,6 +1,7 @@
/*-
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
* 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
@ -10,18 +11,11 @@
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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
* 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 REGENTS OR CONTRIBUTORS BE LIABLE
* 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)
@ -29,77 +23,93 @@
* 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.
*
* $FreeBSD$
*/
#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] =
"$FreeBSD$";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <libutil.h>
#include <netdb.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <utmp.h>
#include <stdio.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 char domain[MAXHOSTNAMELEN];
static int first = 1;
static size_t dlen;
char *s, *end;
int spn, ok;
static char domain[MAXHOSTNAMELEN];
static int first = 1;
static size_t dlen;
char *s, *end;
size_t len;
if (first) {
first = 0;
if (gethostname(domain, sizeof(domain) - 1) == 0 &&
(s = strchr(domain, '.')))
memmove(domain, s + 1, strlen(s + 1) + 1);
else
domain[0] = '\0';
dlen = strlen(domain);
}
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;
if (domain[0] != '\0') {
s = fullhost;
end = s + hostsize + 1;
for (; (s = memchr(s, '.', end - s)) != NULL; s++)
if (!strncasecmp(s + 1, domain, dlen)) {
if (s[dlen + 1] == '\0') {
*s = '\0'; /* Found - lose the domain */
break;
} else if (s[dlen + 1] == ':') { /* $DISPLAY ? */
ok = dlen + 2;
spn = strspn(s + ok, "0123456789");
if (spn > 0 && ok + spn - dlen <= end - s) {
ok += spn;
if (s[ok] == '\0') {
/* host.domain:nn */
memmove(s, s + dlen + 1, ok - dlen);
break;
} else if (s[ok] == '.') {
ok++;
spn = strspn(s + ok, "0123456789");
if (spn > 0 && s[ok + spn] == '\0' &&
ok + spn - dlen <= end - s) {
/* host.domain:nn.nn */
memmove(s, s + dlen + 1, ok + spn - dlen);
break;
}
}
}
}
}
}
end = s + hostsize + 1;
for (; (s = memchr(s, '.', end - s)) != NULL; s++) {
if (strncasecmp(s + 1, domain, dlen) == 0) {
if (s[dlen + 1] == '\0') {
/* Found -- lose the domain. */
*s = '\0';
break;
} else if (s[dlen + 1] == ':' &&
isDISP(s + dlen + 2) &&
(len = strlen(s + dlen + 1)) < end - s) {
/* Found -- shuffle the DISPLAY back. */
memmove(s, s + dlen + 1, len + 1);
break;
}
}
}
}
/*
* Is the given string NN or NN.NN where ``NN'' is an all-numeric string ?
*/
static int
isDISP(const char *disp)
{
int res, w;
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);
}