appl/login/utmp_login.c

   1 /*
   2  * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by the Kungliga Tekniska
  20  *      Högskolan and its contributors.
  21  *
  22  * 4. Neither the name of the Institute nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include "bsd_locl.h"
  40
  41 RCSID("$Id$");
  42
  43 void
  44 prepare_utmp (struct utmp *utmp, char *tty, char *username, char *hostname)
  45 {
  46     char *ttyx = clean_ttyname (tty);
  47
  48     memset(utmp, 0, sizeof(*utmp));
  49     utmp->ut_time = time(NULL);
  50     strncpy(utmp->ut_line, ttyx, sizeof(utmp->ut_line));
  51     strncpy(utmp->ut_name, username, sizeof(utmp->ut_name));
  52
  53 # ifdef HAVE_UT_USER
  54     strncpy(utmp->ut_user, username, sizeof(utmp->ut_user));
  55 # endif
  56
  57 # ifdef HAVE_UT_ADDR
  58     if (hostname[0]) {
  59         struct hostent *he;
  60         if ((he = gethostbyname(hostname)))
  61             memcpy(&utmp->ut_addr, he->h_addr_list[0],
  62                    sizeof(utmp->ut_addr));
  63     }
  64 # endif
  65
  66 # ifdef HAVE_UT_HOST
  67     strncpy(utmp->ut_host, hostname, sizeof(utmp->ut_host));
  68 # endif
  69
  70 # ifdef HAVE_UT_TYPE
  71     utmp->ut_type = USER_PROCESS;
  72 # endif
  73
  74 # ifdef HAVE_UT_PID
  75     utmp->ut_pid = getpid();
  76 # endif
  77
  78 # ifdef HAVE_UT_ID
  79     strncpy(utmp->ut_id, make_id(ttyx), sizeof(utmp->ut_id));
  80 # endif
  81 }
  82
  83 #ifdef HAVE_UTMPX_H
  84 void utmp_login(char *tty, char *username, char *hostname) { return; }
  85 #else
  86
  87 /* update utmp and wtmp - the BSD way */
  88
  89 void utmp_login(char *tty, char *username, char *hostname)
  90 {
  91     struct utmp utmp;
  92     int fd;
  93
  94     prepare_utmp (&utmp, tty, username, hostname);
  95
  96 #ifdef HAVE_SETUTENT
  97     utmpname(_PATH_UTMP);
  98     setutent();
  99     pututline(&utmp);
 100     endutent();
 101 #else
 102
 103 #ifdef HAVE_TTYSLOT
 104     {
 105       int ttyno;
 106       ttyno = ttyslot();
 107       if (ttyno > 0 && (fd = open(_PATH_UTMP, O_WRONLY, 0)) >= 0) {
 108         lseek(fd, (long)(ttyno * sizeof(struct utmp)), SEEK_SET);
 109         write(fd, &utmp, sizeof(struct utmp));
 110         close(fd);
 111       }
 112     }
 113 #endif /* HAVE_TTYSLOT */
 114 #endif /* HAVE_SETUTENT */
 115
 116     if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) >= 0) {
 117         write(fd, &utmp, sizeof(struct utmp));
 118         close(fd);
 119     }
 120 }
 121 #endif /* !HAVE_UTMPX_H */