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annotate lib/readutmp.h @ 40231:9b3c79fdfe0b

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strtod: fix clash with strtold Problem reported for RHEL 5 by Jesse Caldwell (Bug#34817). * lib/strtod.c (compute_minus_zero, minus_zero): Simplify by remving the macro / external variable, and having just a function. User changed. This avoids the need for an external variable that might clash.
author Paul Eggert <eggert@cs.ucla.edu>
date Mon, 11 Mar 2019 16:40:29 -0700
parents b06060465f09
children
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1 /* Declarations for GNU's read utmp module.
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2
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3 Copyright (C) 1992-2007, 2009-2019 Free Software Foundation, Inc.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
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17
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18 /* Written by jla; revised by djm */
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19
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20 #ifndef __READUTMP_H__
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21 # define __READUTMP_H__
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22
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23 # include <sys/types.h>
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24
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25 /* AIX 4.3.3 has both utmp.h and utmpx.h, but only struct utmp
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26 has the ut_exit member. */
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27 # if (HAVE_UTMPX_H && HAVE_UTMP_H && HAVE_STRUCT_UTMP_UT_EXIT \
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28 && ! HAVE_STRUCT_UTMPX_UT_EXIT)
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29 # undef HAVE_UTMPX_H
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30 # endif
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31
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32 # if HAVE_UTMPX_H
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33 # if HAVE_UTMP_H
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34 /* HPUX 10.20 needs utmp.h, for the definition of e.g., UTMP_FILE. */
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35 # include <utmp.h>
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36 # endif
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37 # if defined _THREAD_SAFE && defined UTMP_DATA_INIT
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38 /* When including both utmp.h and utmpx.h on AIX 4.3, with _THREAD_SAFE
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39 defined, work around the duplicate struct utmp_data declaration. */
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40 # define utmp_data gl_aix_4_3_workaround_utmp_data
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41 # endif
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42 # include <utmpx.h>
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43 # define UTMP_STRUCT_NAME utmpx
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44 # define UT_TIME_MEMBER(UT_PTR) ((UT_PTR)->ut_tv.tv_sec)
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45 # define SET_UTMP_ENT setutxent
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46 # define GET_UTMP_ENT getutxent
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47 # define END_UTMP_ENT endutxent
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48 # ifdef HAVE_UTMPXNAME
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49 # define UTMP_NAME_FUNCTION utmpxname
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50 # elif defined UTXDB_ACTIVE
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51 # define UTMP_NAME_FUNCTION(x) setutxdb (UTXDB_ACTIVE, x)
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52 # endif
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53
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54 # if HAVE_STRUCT_UTMPX_UT_EXIT_E_TERMINATION
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55 # define UT_EXIT_E_TERMINATION(U) ((U)->ut_exit.e_termination)
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56 # else
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57 # if HAVE_STRUCT_UTMPX_UT_EXIT_UT_TERMINATION
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58 # define UT_EXIT_E_TERMINATION(U) ((U)->ut_exit.ut_termination)
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59 # else
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60 # define UT_EXIT_E_TERMINATION(U) 0
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61 # endif
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62 # endif
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63
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64 # if HAVE_STRUCT_UTMPX_UT_EXIT_E_EXIT
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65 # define UT_EXIT_E_EXIT(U) ((U)->ut_exit.e_exit)
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66 # else
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67 # if HAVE_STRUCT_UTMPX_UT_EXIT_UT_EXIT
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68 # define UT_EXIT_E_EXIT(U) ((U)->ut_exit.ut_exit)
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69 # else
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70 # define UT_EXIT_E_EXIT(U) 0
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71 # endif
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72 # endif
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73
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74 # elif HAVE_UTMP_H
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75
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76 # include <utmp.h>
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77 # if !HAVE_DECL_GETUTENT
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78 struct utmp *getutent (void);
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79 # endif
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80 # define UTMP_STRUCT_NAME utmp
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81 # define UT_TIME_MEMBER(UT_PTR) ((UT_PTR)->ut_time)
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82 # define SET_UTMP_ENT setutent
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83 # define GET_UTMP_ENT getutent
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84 # define END_UTMP_ENT endutent
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85 # ifdef HAVE_UTMPNAME
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86 # define UTMP_NAME_FUNCTION utmpname
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87 # endif
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88
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89 # if HAVE_STRUCT_UTMP_UT_EXIT_E_TERMINATION
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90 # define UT_EXIT_E_TERMINATION(U) ((U)->ut_exit.e_termination)
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91 # else
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92 # if HAVE_STRUCT_UTMP_UT_EXIT_UT_TERMINATION
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93 # define UT_EXIT_E_TERMINATION(U) ((U)->ut_exit.ut_termination)
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94 # else
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95 # define UT_EXIT_E_TERMINATION(U) 0
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96 # endif
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97 # endif
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98
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99 # if HAVE_STRUCT_UTMP_UT_EXIT_E_EXIT
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100 # define UT_EXIT_E_EXIT(U) ((U)->ut_exit.e_exit)
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101 # else
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102 # if HAVE_STRUCT_UTMP_UT_EXIT_UT_EXIT
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103 # define UT_EXIT_E_EXIT(U) ((U)->ut_exit.ut_exit)
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104 # else
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105 # define UT_EXIT_E_EXIT(U) 0
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106 # endif
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107 # endif
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108
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109 # endif
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110
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111 /* Accessor macro for the member named ut_user or ut_name. */
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112 # if HAVE_UTMPX_H
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113
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114 # if HAVE_STRUCT_UTMPX_UT_USER
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115 # define UT_USER(Utmp) ((Utmp)->ut_user)
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116 # endif
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117 # if HAVE_STRUCT_UTMPX_UT_NAME
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118 # undef UT_USER
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119 # define UT_USER(Utmp) ((Utmp)->ut_name)
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120 # endif
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121
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122 # elif HAVE_UTMP_H
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123
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124 # if HAVE_STRUCT_UTMP_UT_USER
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125 # define UT_USER(Utmp) ((Utmp)->ut_user)
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126 # endif
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127 # if HAVE_STRUCT_UTMP_UT_NAME
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128 # undef UT_USER
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129 # define UT_USER(Utmp) ((Utmp)->ut_name)
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130 # endif
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131
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132 # endif
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133
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134 # define HAVE_STRUCT_XTMP_UT_EXIT \
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135 (HAVE_STRUCT_UTMP_UT_EXIT \
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136 || HAVE_STRUCT_UTMPX_UT_EXIT)
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137
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138 # define HAVE_STRUCT_XTMP_UT_ID \
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139 (HAVE_STRUCT_UTMP_UT_ID \
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140 || HAVE_STRUCT_UTMPX_UT_ID)
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141
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142 # define HAVE_STRUCT_XTMP_UT_PID \
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143 (HAVE_STRUCT_UTMP_UT_PID \
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144 || HAVE_STRUCT_UTMPX_UT_PID)
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145
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146 typedef struct UTMP_STRUCT_NAME STRUCT_UTMP;
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147
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148 enum { UT_USER_SIZE = sizeof UT_USER ((STRUCT_UTMP *) 0) };
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149
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150 # if !defined UTMP_FILE && defined _PATH_UTMP
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151 # define UTMP_FILE _PATH_UTMP
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152 # endif
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153
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154 # if !defined WTMP_FILE && defined _PATH_WTMP
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155 # define WTMP_FILE _PATH_WTMP
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156 # endif
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157
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158 # ifdef UTMPX_FILE /* Solaris, SysVr4 */
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159 # undef UTMP_FILE
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160 # define UTMP_FILE UTMPX_FILE
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161 # endif
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162
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163 # ifdef WTMPX_FILE /* Solaris, SysVr4 */
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164 # undef WTMP_FILE
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165 # define WTMP_FILE WTMPX_FILE
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166 # endif
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167
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168 # ifndef UTMP_FILE
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169 # define UTMP_FILE "/etc/utmp"
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170 # endif
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171
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172 # ifndef WTMP_FILE
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173 # define WTMP_FILE "/etc/wtmp"
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174 # endif
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175
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176 # if HAVE_STRUCT_XTMP_UT_PID
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177 # define UT_PID(U) ((U)->ut_pid)
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178 # else
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179 # define UT_PID(U) 0
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180 # endif
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181
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182 # if HAVE_STRUCT_UTMP_UT_TYPE || HAVE_STRUCT_UTMPX_UT_TYPE
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183 # define UT_TYPE_EQ(U, V) ((U)->ut_type == (V))
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184 # define UT_TYPE_NOT_DEFINED 0
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185 # else
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186 # define UT_TYPE_EQ(U, V) 0
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187 # define UT_TYPE_NOT_DEFINED 1
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188 # endif
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189
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190 # ifdef BOOT_TIME
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191 # define UT_TYPE_BOOT_TIME(U) UT_TYPE_EQ (U, BOOT_TIME)
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192 # else
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193 # define UT_TYPE_BOOT_TIME(U) 0
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194 # endif
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195
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196 # ifdef USER_PROCESS
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197 # define UT_TYPE_USER_PROCESS(U) UT_TYPE_EQ (U, USER_PROCESS)
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198 # else
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199 # define UT_TYPE_USER_PROCESS(U) 0
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200 # endif
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201
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202 # define IS_USER_PROCESS(U) \
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203 (UT_USER (U)[0] \
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204 && (UT_TYPE_USER_PROCESS (U) \
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205 || (UT_TYPE_NOT_DEFINED && UT_TIME_MEMBER (U) != 0)))
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206
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207 /* Options for read_utmp. */
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208 enum
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209 {
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210 READ_UTMP_CHECK_PIDS = 1,
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211 READ_UTMP_USER_PROCESS = 2
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212 };
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213
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214 char *extract_trimmed_name (const STRUCT_UTMP *ut);
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215 int read_utmp (char const *file, size_t *n_entries, STRUCT_UTMP **utmp_buf,
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216 int options);
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217
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218 #endif /* __READUTMP_H__ */