163 lines
4.5 KiB
C
163 lines
4.5 KiB
C
/*
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* Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT 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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#include "login_locl.h"
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RCSID("$Id: utmp_login.c,v 1.18 2001/02/08 16:08:26 assar Exp $");
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/* try to put something useful from hostname into dst, dst_sz:
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* full name, first component or address */
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void
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shrink_hostname (const char *hostname,
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char *dst, size_t dst_sz)
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{
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char local_hostname[MaxHostNameLen];
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char *ld, *hd;
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int ret;
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struct addrinfo *ai;
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if (strlen(hostname) < dst_sz) {
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strlcpy (dst, hostname, dst_sz);
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return;
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}
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gethostname (local_hostname, sizeof(local_hostname));
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hd = strchr (hostname, '.');
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ld = strchr (local_hostname, '.');
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if (hd != NULL && ld != NULL && strcmp(hd, ld) == 0
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&& hd - hostname < dst_sz) {
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strlcpy (dst, hostname, dst_sz);
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dst[hd - hostname] = '\0';
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return;
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}
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ret = getaddrinfo (hostname, NULL, NULL, &ai);
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if (ret) {
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strncpy (dst, hostname, dst_sz);
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return;
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}
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ret = getnameinfo (ai->ai_addr, ai->ai_addrlen,
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dst, dst_sz,
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NULL, 0,
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NI_NUMERICHOST);
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freeaddrinfo (ai);
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if (ret) {
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strncpy (dst, hostname, dst_sz);
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return;
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}
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}
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void
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prepare_utmp (struct utmp *utmp, char *tty,
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const char *username, const char *hostname)
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{
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char *ttyx = clean_ttyname (tty);
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memset(utmp, 0, sizeof(*utmp));
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utmp->ut_time = time(NULL);
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strncpy(utmp->ut_line, ttyx, sizeof(utmp->ut_line));
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strncpy(utmp->ut_name, username, sizeof(utmp->ut_name));
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# ifdef HAVE_STRUCT_UTMP_UT_USER
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strncpy(utmp->ut_user, username, sizeof(utmp->ut_user));
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# endif
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# ifdef HAVE_STRUCT_UTMP_UT_ADDR
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if (hostname[0]) {
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struct hostent *he;
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if ((he = gethostbyname(hostname)))
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memcpy(&utmp->ut_addr, he->h_addr_list[0],
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sizeof(utmp->ut_addr));
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}
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# endif
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# ifdef HAVE_STRUCT_UTMP_UT_HOST
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shrink_hostname (hostname, utmp->ut_host, sizeof(utmp->ut_host));
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# endif
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# ifdef HAVE_STRUCT_UTMP_UT_TYPE
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utmp->ut_type = USER_PROCESS;
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# endif
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# ifdef HAVE_STRUCT_UTMP_UT_PID
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utmp->ut_pid = getpid();
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# endif
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# ifdef HAVE_STRUCT_UTMP_UT_ID
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strncpy(utmp->ut_id, make_id(ttyx), sizeof(utmp->ut_id));
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# endif
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}
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#ifdef HAVE_UTMPX_H
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void utmp_login(char *tty, const char *username, const char *hostname)
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{
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return;
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}
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#else
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/* update utmp and wtmp - the BSD way */
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void utmp_login(char *tty, const char *username, const char *hostname)
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{
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struct utmp utmp;
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int fd;
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prepare_utmp (&utmp, tty, username, hostname);
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#ifdef HAVE_SETUTENT
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utmpname(_PATH_UTMP);
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setutent();
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pututline(&utmp);
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endutent();
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#else
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#ifdef HAVE_TTYSLOT
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{
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int ttyno;
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ttyno = ttyslot();
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if (ttyno > 0 && (fd = open(_PATH_UTMP, O_WRONLY, 0)) >= 0) {
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lseek(fd, (long)(ttyno * sizeof(struct utmp)), SEEK_SET);
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write(fd, &utmp, sizeof(struct utmp));
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close(fd);
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}
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}
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#endif /* HAVE_TTYSLOT */
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#endif /* HAVE_SETUTENT */
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if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) >= 0) {
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write(fd, &utmp, sizeof(struct utmp));
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close(fd);
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}
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}
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#endif /* !HAVE_UTMPX_H */
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