lib/readutmp.h

   1 /* Declarations for GNU's read utmp module.
   2    Copyright (C) 1992-2000 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 /* Written by jla; revised by djm */
  19
  20 #ifndef __READUTMP_H__
  21 # define __READUTMP_H__
  22
  23 # ifndef PARAMS
  24 #  if defined PROTOTYPES || (defined __STDC__ && __STDC__)
  25 #   define PARAMS(Args) Args
  26 #  else
  27 #   define PARAMS(Args) ()
  28 #  endif
  29 # endif
  30
  31 # include <sys/types.h>
  32
  33 # ifdef HAVE_UTMPX_H
  34 #  ifdef HAVE_UTMP_H
  35     /* HPUX 10.20 needs utmp.h, for the definition of e.g., UTMP_FILE.  */
  36 #   include <utmp.h>
  37 #  endif
  38 #  include <utmpx.h>
  39 #  define UTMP_STRUCT_NAME utmpx
  40 #  define UT_TIME_MEMBER(UT_PTR) ((UT_PTR)->ut_tv.tv_sec)
  41 #  define SET_UTMP_ENT setutxent
  42 #  define GET_UTMP_ENT getutxent
  43 #  define END_UTMP_ENT endutxent
  44 #  ifdef HAVE_UTMPXNAME
  45 #   define UTMP_NAME_FUNCTION utmpxname
  46 #  endif
  47 # else
  48 #  include <utmp.h>
  49 #  if !HAVE_DECL_GETUTENT
  50     struct utmp *getutent();
  51 #  endif
  52 #  define UTMP_STRUCT_NAME utmp
  53 #  define UT_TIME_MEMBER(UT_PTR) ((UT_PTR)->ut_time)
  54 #  define SET_UTMP_ENT setutent
  55 #  define GET_UTMP_ENT getutent
  56 #  define END_UTMP_ENT endutent
  57 #  ifdef HAVE_UTMPNAME
  58 #   define UTMP_NAME_FUNCTION utmpname
  59 #  endif
  60 # endif
  61
  62 /* Accessor macro for the member named ut_user or ut_name.  */
  63 # ifdef HAVE_UTMPX_H
  64
  65 #  if HAVE_STRUCT_UTMPX_UT_USER
  66 #   define UT_USER(Utmp) ((Utmp)->ut_user)
  67 #  endif
  68 #  if HAVE_STRUCT_UTMPX_UT_NAME
  69 #   undef UT_USER
  70 #   define UT_USER(Utmp) ((Utmp)->ut_name)
  71 #  endif
  72
  73 # else
  74
  75 #  if HAVE_STRUCT_UTMP_UT_USER
  76 #   define UT_USER(Utmp) Utmp->ut_user
  77 #  endif
  78 #  if HAVE_STRUCT_UTMP_UT_NAME
  79 #   undef UT_USER
  80 #   define UT_USER(Utmp) Utmp->ut_name
  81 #  endif
  82
  83 # endif
  84
  85 typedef struct UTMP_STRUCT_NAME STRUCT_UTMP;
  86
  87 # include <time.h>
  88 # ifdef HAVE_SYS_PARAM_H
  89 #  include <sys/param.h>
  90 # endif
  91
  92 # include <errno.h>
  93 # ifndef errno
  94 extern int errno;
  95 # endif
  96
  97 # if !defined (UTMP_FILE) && defined (_PATH_UTMP)
  98 #  define UTMP_FILE _PATH_UTMP
  99 # endif
 100
 101 # if !defined (WTMP_FILE) && defined (_PATH_WTMP)
 102 #  define WTMP_FILE _PATH_WTMP
 103 # endif
 104
 105 # ifdef UTMPX_FILE /* Solaris, SysVr4 */
 106 #  undef UTMP_FILE
 107 #  define UTMP_FILE UTMPX_FILE
 108 # endif
 109
 110 # ifdef WTMPX_FILE /* Solaris, SysVr4 */
 111 #  undef WTMP_FILE
 112 #  define WTMP_FILE WTMPX_FILE
 113 # endif
 114
 115 # ifndef UTMP_FILE
 116 #  define UTMP_FILE "/etc/utmp"
 117 # endif
 118
 119 # ifndef WTMP_FILE
 120 #  define WTMP_FILE "/etc/wtmp"
 121 # endif
 122
 123 # undef PARAMS
 124 # if defined (__STDC__) && __STDC__
 125 #  define PARAMS(Args) Args
 126 # else
 127 #  define PARAMS(Args) ()
 128 # endif
 129
 130 extern char *extract_trimmed_name PARAMS ((const STRUCT_UTMP *ut));
 131 extern int read_utmp PARAMS ((const char *filename,
 132                               int *n_entries, STRUCT_UTMP **utmp_buf));
 133
 134 #endif /* __READUTMP_H__ */