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/*
* Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* 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. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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 "login_locl.h"
RCSID("$Id: utmp_login.c 9661 2001-02-08 16:08:47Z assar $");
/* try to put something useful from hostname into dst, dst_sz:
* full name, first component or address */
void
shrink_hostname (const char *hostname,
char *dst, size_t dst_sz)
{
char local_hostname[MaxHostNameLen];
char *ld, *hd;
int ret;
struct addrinfo *ai;
if (strlen(hostname) < dst_sz) {
strlcpy (dst, hostname, dst_sz);
return;
}
gethostname (local_hostname, sizeof(local_hostname));
hd = strchr (hostname, '.');
ld = strchr (local_hostname, '.');
if (hd != NULL && ld != NULL && strcmp(hd, ld) == 0
&& hd - hostname < dst_sz) {
strlcpy (dst, hostname, dst_sz);
dst[hd - hostname] = '\0';
return;
}
ret = getaddrinfo (hostname, NULL, NULL, &ai);
if (ret) {
strncpy (dst, hostname, dst_sz);
return;
}
ret = getnameinfo (ai->ai_addr, ai->ai_addrlen,
dst, dst_sz,
NULL, 0,
NI_NUMERICHOST);
freeaddrinfo (ai);
if (ret) {
strncpy (dst, hostname, dst_sz);
return;
}
}
void
prepare_utmp (struct utmp *utmp, char *tty,
const char *username, const char *hostname)
{
char *ttyx = clean_ttyname (tty);
memset(utmp, 0, sizeof(*utmp));
utmp->ut_time = time(NULL);
strncpy(utmp->ut_line, ttyx, sizeof(utmp->ut_line));
strncpy(utmp->ut_name, username, sizeof(utmp->ut_name));
# ifdef HAVE_STRUCT_UTMP_UT_USER
strncpy(utmp->ut_user, username, sizeof(utmp->ut_user));
# endif
# ifdef HAVE_STRUCT_UTMP_UT_ADDR
if (hostname[0]) {
struct hostent *he;
if ((he = gethostbyname(hostname)))
memcpy(&utmp->ut_addr, he->h_addr_list[0],
sizeof(utmp->ut_addr));
}
# endif
# ifdef HAVE_STRUCT_UTMP_UT_HOST
shrink_hostname (hostname, utmp->ut_host, sizeof(utmp->ut_host));
# endif
# ifdef HAVE_STRUCT_UTMP_UT_TYPE
utmp->ut_type = USER_PROCESS;
# endif
# ifdef HAVE_STRUCT_UTMP_UT_PID
utmp->ut_pid = getpid();
# endif
# ifdef HAVE_STRUCT_UTMP_UT_ID
strncpy(utmp->ut_id, make_id(ttyx), sizeof(utmp->ut_id));
# endif
}
#ifdef HAVE_UTMPX_H
void utmp_login(char *tty, const char *username, const char *hostname)
{
return;
}
#else
/* update utmp and wtmp - the BSD way */
void utmp_login(char *tty, const char *username, const char *hostname)
{
struct utmp utmp;
int fd;
prepare_utmp (&utmp, tty, username, hostname);
#ifdef HAVE_SETUTENT
utmpname(_PATH_UTMP);
setutent();
pututline(&utmp);
endutent();
#else
#ifdef HAVE_TTYSLOT
{
int ttyno;
ttyno = ttyslot();
if (ttyno > 0 && (fd = open(_PATH_UTMP, O_WRONLY, 0)) >= 0) {
lseek(fd, (long)(ttyno * sizeof(struct utmp)), SEEK_SET);
write(fd, &utmp, sizeof(struct utmp));
close(fd);
}
}
#endif /* HAVE_TTYSLOT */
#endif /* HAVE_SETUTENT */
if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) >= 0) {
write(fd, &utmp, sizeof(struct utmp));
close(fd);
}
}
#endif /* !HAVE_UTMPX_H */
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