lib/readutmp.h

   1 /* Declarations for GNU's read utmp module.
   2
   3    Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   4    2001, 2002, 2003 Free Software Foundation, Inc.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software Foundation,
  18    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 /* Written by jla; revised by djm */
  21
  22 #ifndef __READUTMP_H__
  23 # define __READUTMP_H__
  24
  25 # include <sys/types.h>
  26
  27 /* AIX 4.3.3 has both utmp.h and utmpx.h, but only struct utmp
  28    has the ut_exit member.  */
  29 # if (HAVE_UTMPX_H && HAVE_UTMP_H && HAVE_STRUCT_UTMP_UT_EXIT \
  30       && ! HAVE_STRUCT_UTMPX_UT_EXIT)
  31 #  undef HAVE_UTMPX_H
  32 # endif
  33
  34 # ifdef HAVE_UTMPX_H
  35 #  ifdef HAVE_UTMP_H
  36     /* HPUX 10.20 needs utmp.h, for the definition of e.g., UTMP_FILE.  */
  37 #   include <utmp.h>
  38 #  endif
  39 #  include <utmpx.h>
  40 #  define UTMP_STRUCT_NAME utmpx
  41 #  define UT_TIME_MEMBER(UT_PTR) ((UT_PTR)->ut_tv.tv_sec)
  42 #  define SET_UTMP_ENT setutxent
  43 #  define GET_UTMP_ENT getutxent
  44 #  define END_UTMP_ENT endutxent
  45 #  ifdef HAVE_UTMPXNAME
  46 #   define UTMP_NAME_FUNCTION utmpxname
  47 #  endif
  48
  49 #  if HAVE_STRUCT_UTMPX_UT_EXIT_E_TERMINATION
  50 #   define UT_EXIT_E_TERMINATION(U) ((U)->ut_exit.e_termination)
  51 #  else
  52 #   if HAVE_STRUCT_UTMPX_UT_EXIT_UT_TERMINATION
  53 #    define UT_EXIT_E_TERMINATION(U) ((U)->ut_exit.ut_termination)
  54 #   else
  55 #    define UT_EXIT_E_TERMINATION(U) 0
  56 #   endif
  57 #  endif
  58
  59 #  if HAVE_STRUCT_UTMPX_UT_EXIT_E_EXIT
  60 #   define UT_EXIT_E_EXIT(U) ((U)->ut_exit.e_exit)
  61 #  else
  62 #   if HAVE_STRUCT_UTMPX_UT_EXIT_UT_EXIT
  63 #    define UT_EXIT_E_EXIT(U) ((U)->ut_exit.ut_exit)
  64 #   else
  65 #    define UT_EXIT_E_EXIT(U) 0
  66 #   endif
  67 #  endif
  68
  69 # else
  70 #  include <utmp.h>
  71 #  if !HAVE_DECL_GETUTENT
  72     struct utmp *getutent();
  73 #  endif
  74 #  define UTMP_STRUCT_NAME utmp
  75 #  define UT_TIME_MEMBER(UT_PTR) ((UT_PTR)->ut_time)
  76 #  define SET_UTMP_ENT setutent
  77 #  define GET_UTMP_ENT getutent
  78 #  define END_UTMP_ENT endutent
  79 #  ifdef HAVE_UTMPNAME
  80 #   define UTMP_NAME_FUNCTION utmpname
  81 #  endif
  82
  83 #  if HAVE_STRUCT_UTMP_UT_EXIT_E_TERMINATION
  84 #   define UT_EXIT_E_TERMINATION(U) ((U)->ut_exit.e_termination)
  85 #  else
  86 #   if HAVE_STRUCT_UTMP_UT_EXIT_UT_TERMINATION
  87 #    define UT_EXIT_E_TERMINATION(U) ((U)->ut_exit.ut_termination)
  88 #   else
  89 #    define UT_EXIT_E_TERMINATION(U) 0
  90 #   endif
  91 #  endif
  92
  93 #  if HAVE_STRUCT_UTMP_UT_EXIT_E_EXIT
  94 #   define UT_EXIT_E_EXIT(U) ((U)->ut_exit.e_exit)
  95 #  else
  96 #   if HAVE_STRUCT_UTMP_UT_EXIT_UT_EXIT
  97 #    define UT_EXIT_E_EXIT(U) ((U)->ut_exit.ut_exit)
  98 #   else
  99 #    define UT_EXIT_E_EXIT(U) 0
 100 #   endif
 101 #  endif
 102
 103 # endif
 104
 105 /* Accessor macro for the member named ut_user or ut_name.  */
 106 # ifdef HAVE_UTMPX_H
 107
 108 #  if HAVE_STRUCT_UTMPX_UT_USER
 109 #   define UT_USER(Utmp) ((Utmp)->ut_user)
 110 #  endif
 111 #  if HAVE_STRUCT_UTMPX_UT_NAME
 112 #   undef UT_USER
 113 #   define UT_USER(Utmp) ((Utmp)->ut_name)
 114 #  endif
 115
 116 # else
 117
 118 #  if HAVE_STRUCT_UTMP_UT_USER
 119 #   define UT_USER(Utmp) Utmp->ut_user
 120 #  endif
 121 #  if HAVE_STRUCT_UTMP_UT_NAME
 122 #   undef UT_USER
 123 #   define UT_USER(Utmp) Utmp->ut_name
 124 #  endif
 125
 126 # endif
 127
 128 # define HAVE_STRUCT_XTMP_UT_EXIT \
 129     (HAVE_STRUCT_UTMP_UT_EXIT \
 130      || HAVE_STRUCT_UTMPX_UT_EXIT)
 131
 132 # define HAVE_STRUCT_XTMP_UT_ID \
 133     (HAVE_STRUCT_UTMP_UT_ID \
 134      || HAVE_STRUCT_UTMPX_UT_ID)
 135
 136 # define HAVE_STRUCT_XTMP_UT_PID \
 137     (HAVE_STRUCT_UTMP_UT_PID \
 138      || HAVE_STRUCT_UTMPX_UT_PID)
 139
 140 # define HAVE_STRUCT_XTMP_UT_TYPE \
 141     (HAVE_STRUCT_UTMP_UT_TYPE \
 142      || HAVE_STRUCT_UTMPX_UT_TYPE)
 143
 144 typedef struct UTMP_STRUCT_NAME STRUCT_UTMP;
 145
 146 # include <time.h>
 147 # ifdef HAVE_SYS_PARAM_H
 148 #  include <sys/param.h>
 149 # endif
 150
 151 # include <errno.h>
 152 # ifndef errno
 153 extern int errno;
 154 # endif
 155
 156 # if !defined (UTMP_FILE) && defined (_PATH_UTMP)
 157 #  define UTMP_FILE _PATH_UTMP
 158 # endif
 159
 160 # if !defined (WTMP_FILE) && defined (_PATH_WTMP)
 161 #  define WTMP_FILE _PATH_WTMP
 162 # endif
 163
 164 # ifdef UTMPX_FILE /* Solaris, SysVr4 */
 165 #  undef UTMP_FILE
 166 #  define UTMP_FILE UTMPX_FILE
 167 # endif
 168
 169 # ifdef WTMPX_FILE /* Solaris, SysVr4 */
 170 #  undef WTMP_FILE
 171 #  define WTMP_FILE WTMPX_FILE
 172 # endif
 173
 174 # ifndef UTMP_FILE
 175 #  define UTMP_FILE "/etc/utmp"
 176 # endif
 177
 178 # ifndef WTMP_FILE
 179 #  define WTMP_FILE "/etc/wtmp"
 180 # endif
 181
 182 char *extract_trimmed_name (const STRUCT_UTMP *ut);
 183 int read_utmp (const char *filename, int *n_entries, STRUCT_UTMP **utmp_buf);
 184
 185 #endif /* __READUTMP_H__ */