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/*-
* Copyright (c) 1988, 1993
* The Regents of the University of California. 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.
* 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
* 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
* 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)logwtmp.c 8.1 (Berkeley) 6/4/93";
#else
static const char rcsid[] =
"$FreeBSD$";
#endif
#endif /* LIBC_SCCS and not lint */
#include <sys/param.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>
void
trimdomain(char *fullhost, int hostsize)
{
static char domain[MAXHOSTNAMELEN];
static int first = 1;
static size_t dlen;
char *s, *end;
int spn, ok;
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 (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;
}
}
}
}
}
}
}
void
logwtmp(line, name, host)
const char *line;
const char *name;
const char *host;
{
struct utmp ut;
struct stat buf;
char fullhost[MAXHOSTNAMELEN];
int fd;
strncpy(fullhost, host, sizeof(fullhost) - 1);
fullhost[sizeof(fullhost) - 1] = '\0';
trimdomain(fullhost, UT_HOSTSIZE);
host = fullhost;
if (strlen(host) > UT_HOSTSIZE) {
struct hostent *hp = gethostbyname(host);
if (hp != NULL) {
struct in_addr in;
memmove(&in, hp->h_addr, sizeof(in));
host = inet_ntoa(in);
} else
host = "invalid hostname";
}
if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0)
return;
if (fstat(fd, &buf) == 0) {
(void) strncpy(ut.ut_line, line, sizeof(ut.ut_line));
(void) strncpy(ut.ut_name, name, sizeof(ut.ut_name));
(void) strncpy(ut.ut_host, host, sizeof(ut.ut_host));
(void) time(&ut.ut_time);
if (write(fd, (char *)&ut, sizeof(struct utmp)) !=
sizeof(struct utmp))
(void) ftruncate(fd, buf.st_size);
}
(void) close(fd);
}
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