[134] | 1 | /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- |
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| 2 | * |
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| 3 | * Copyright (C) 2006 Ray Strode <rstrode@redhat.com> |
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| 4 | * Copyright (C) 2007 William Jon McCann <mccann@jhu.edu> |
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| 5 | * |
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| 6 | * This program is free software; you can redistribute it and/or modify |
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| 7 | * it under the terms of the GNU General Public License as published by |
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| 8 | * the Free Software Foundation; either version 2, or (at your option) |
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| 9 | * any later version. |
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| 10 | * |
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| 11 | * This program is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | * GNU General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU General Public License |
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| 17 | * along with this program; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
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| 19 | * 02111-1307, USA. |
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| 20 | */ |
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| 21 | |
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| 22 | #include "config.h" |
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| 23 | |
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| 24 | #include <stdlib.h> |
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| 25 | #include <string.h> |
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| 26 | #include <unistd.h> |
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| 27 | |
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| 28 | #if defined(HAVE_UTMPX_H) |
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| 29 | #include <utmpx.h> |
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| 30 | #endif |
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| 31 | |
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| 32 | #if defined(HAVE_UTMP_H) |
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| 33 | #include <utmp.h> |
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| 34 | #endif |
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| 35 | |
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| 36 | #include <glib.h> |
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| 37 | #include <glib/gi18n.h> |
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| 38 | #include <glib/gstdio.h> |
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| 39 | |
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| 40 | #include "gdm-session-record.h" |
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| 41 | |
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| 42 | #ifndef GDM_BAD_SESSION_RECORDS_FILE |
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| 43 | #define GDM_BAD_SESSION_RECORDS_FILE "/var/log/btmp" |
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| 44 | #endif |
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| 45 | |
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| 46 | #if !defined(GDM_NEW_SESSION_RECORDS_FILE) |
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| 47 | # if defined(WTMPX_FILE) |
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| 48 | # define GDM_NEW_SESSION_RECORDS_FILE WTMPX_FILE |
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| 49 | # elif defined(_PATH_WTMPX) |
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| 50 | # define GDM_NEW_SESSION_RECORDS_FILE _PATH_WTMPX |
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| 51 | # elif defined(WTMPX_FILENAME) |
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| 52 | # define GDM_NEW_SESSION_RECORDS_FILE WTMPX_FILENAME |
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| 53 | # elif defined(WTMP_FILE) |
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| 54 | # define GDM_NEW_SESSION_RECORDS_FILE WTMP_FILE |
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| 55 | # elif defined(_PATH_WTMP) /* BSD systems */ |
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| 56 | # define GDM_NEW_SESSION_RECORDS_FILE _PATH_WTMP |
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| 57 | # else |
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| 58 | # define GDM_NEW_SESSION_RECORDS_FILE "/var/log/wtmp" |
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| 59 | # endif |
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| 60 | #endif |
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| 61 | |
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| 62 | static void |
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| 63 | record_set_username (UTMP *u, |
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| 64 | const char *user_name) |
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| 65 | { |
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| 66 | const char *username; |
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| 67 | |
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| 68 | /* |
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| 69 | * It is possible that PAM failed before it mapped the user |
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| 70 | * input into a valid username, so we fallback to try using |
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| 71 | * "(unknown)" |
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| 72 | */ |
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| 73 | if (user_name != NULL) { |
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| 74 | username = user_name; |
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| 75 | } else { |
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| 76 | username = "(unknown)"; |
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| 77 | } |
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| 78 | |
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| 79 | #if defined(HAVE_UT_UT_USER) |
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| 80 | strncpy (u->ut_user, |
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| 81 | username, |
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| 82 | sizeof (u->ut_user)); |
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| 83 | g_debug ("using ut_user %.*s", |
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| 84 | (int) sizeof (u->ut_user), |
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| 85 | u->ut_user); |
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| 86 | #elif defined(HAVE_UT_UT_NAME) |
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| 87 | strncpy (u->ut_name, |
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| 88 | username, |
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| 89 | sizeof (u->ut_name)); |
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| 90 | g_debug ("using ut_name %.*s", |
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| 91 | (int) sizeof (u->ut_name), |
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| 92 | u->ut_name); |
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| 93 | #endif |
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| 94 | } |
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| 95 | |
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| 96 | static void |
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| 97 | record_set_timestamp (UTMP *u) |
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| 98 | { |
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| 99 | #if defined(HAVE_UT_UT_TV) |
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| 100 | GTimeVal now = { 0 }; |
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| 101 | |
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| 102 | /* Set time in TV format */ |
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| 103 | g_get_current_time (&now); |
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| 104 | u->ut_tv.tv_sec = now.tv_sec; |
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| 105 | u->ut_tv.tv_usec = now.tv_usec; |
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| 106 | g_debug ("using ut_tv time %ld", |
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| 107 | (glong) u->ut_tv.tv_sec); |
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| 108 | #elif defined(HAVE_UT_UT_TIME) |
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| 109 | /* Set time in time format */ |
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| 110 | time (&u->ut_time); |
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| 111 | g_debug ("using ut_time %ld", |
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| 112 | (glong) u->ut_time); |
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| 113 | #endif |
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| 114 | } |
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| 115 | |
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| 116 | static void |
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| 117 | record_set_pid (UTMP *u, |
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| 118 | GPid pid) |
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| 119 | { |
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| 120 | #if defined(HAVE_UT_UT_PID) |
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| 121 | /* Set pid */ |
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| 122 | if (pid != 0) { |
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| 123 | u->ut_pid = pid; |
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| 124 | } |
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| 125 | g_debug ("using ut_pid %d", (int) u->ut_pid); |
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| 126 | #endif |
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| 127 | } |
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| 128 | |
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| 129 | static void |
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| 130 | record_set_id (UTMP *u, |
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| 131 | const char *id) |
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| 132 | { |
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| 133 | #if defined(HAVE_UT_UT_ID) |
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| 134 | strncpy (u->ut_id, id, sizeof (u->ut_id)); |
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| 135 | g_debug ("using ut_id %.*s", (int) sizeof (u->ut_id), u->ut_id); |
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| 136 | #endif |
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| 137 | } |
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| 138 | |
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| 139 | static void |
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| 140 | record_set_host (UTMP *u, |
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| 141 | const char *x11_display_name, |
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| 142 | const char *host_name) |
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| 143 | { |
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| 144 | char *hostname; |
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| 145 | |
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| 146 | #if defined(HAVE_UT_UT_HOST) |
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| 147 | hostname = NULL; |
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| 148 | |
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| 149 | /* |
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| 150 | * Set ut_host to hostname:$DISPLAY if remote, otherwise set |
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| 151 | * to $DISPLAY |
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| 152 | */ |
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| 153 | if (host_name != NULL |
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| 154 | && x11_display_name != NULL |
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| 155 | && g_str_has_prefix (x11_display_name, ":")) { |
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| 156 | hostname = g_strdup_printf ("%s%s", host_name, x11_display_name); |
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| 157 | } else { |
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| 158 | hostname = g_strdup (x11_display_name); |
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| 159 | } |
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| 160 | |
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| 161 | if (hostname != NULL) { |
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| 162 | strncpy (u->ut_host, hostname, sizeof (u->ut_host)); |
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| 163 | g_debug ("using ut_host %.*s", (int) sizeof (u->ut_host), u->ut_host); |
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| 164 | g_free (hostname); |
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| 165 | |
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| 166 | #ifdef HAVE_UT_UT_SYSLEN |
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| 167 | u->ut_syslen = MIN (strlen (hostname), sizeof (u->ut_host)); |
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| 168 | #endif |
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| 169 | } |
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| 170 | #endif |
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| 171 | } |
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| 172 | |
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| 173 | static void |
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| 174 | record_set_line (UTMP *u, |
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| 175 | const char *display_device, |
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| 176 | const char *x11_display_name) |
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| 177 | { |
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| 178 | /* |
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| 179 | * Set ut_line to the device name associated with this display |
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| 180 | * but remove the "/dev/" prefix. If no device, then use the |
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| 181 | * $DISPLAY value. |
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| 182 | */ |
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| 183 | if (display_device != NULL |
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| 184 | && g_str_has_prefix (display_device, "/dev/")) { |
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| 185 | strncpy (u->ut_line, |
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| 186 | display_device + strlen ("/dev/"), |
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| 187 | sizeof (u->ut_line)); |
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| 188 | } else if (x11_display_name != NULL |
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| 189 | && g_str_has_prefix (x11_display_name, ":")) { |
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| 190 | strncpy (u->ut_line, |
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| 191 | x11_display_name, |
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| 192 | sizeof (u->ut_line)); |
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| 193 | } |
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| 194 | |
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| 195 | g_debug ("using ut_line %.*s", (int) sizeof (u->ut_line), u->ut_line); |
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| 196 | } |
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| 197 | |
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| 198 | void |
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| 199 | gdm_session_record_login (GPid session_pid, |
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| 200 | const char *user_name, |
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| 201 | const char *host_name, |
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| 202 | const char *x11_display_name, |
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| 203 | const char *display_device) |
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| 204 | { |
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| 205 | UTMP session_record = { 0 }; |
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| 206 | UTMP *u; |
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| 207 | |
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| 208 | record_set_username (&session_record, user_name); |
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| 209 | |
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| 210 | g_debug ("Writing login record"); |
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| 211 | |
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| 212 | #if defined(HAVE_UT_UT_TYPE) |
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| 213 | session_record.ut_type = USER_PROCESS; |
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| 214 | g_debug ("using ut_type USER_PROCESS"); |
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| 215 | #endif |
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| 216 | |
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| 217 | record_set_timestamp (&session_record); |
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| 218 | record_set_pid (&session_record, session_pid); |
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| 219 | |
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| 220 | /* Set ut_id to the $DISPLAY value */ |
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| 221 | record_set_id (&session_record, x11_display_name); |
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| 222 | record_set_host (&session_record, x11_display_name, host_name); |
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| 223 | record_set_line (&session_record, display_device, x11_display_name); |
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| 224 | |
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| 225 | /* Handle wtmp */ |
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| 226 | g_debug ("Writing wtmp session record to " GDM_NEW_SESSION_RECORDS_FILE); |
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| 227 | #if defined(HAVE_UPDWTMPX) |
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| 228 | updwtmpx (GDM_NEW_SESSION_RECORDS_FILE, &session_record); |
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| 229 | #elif defined(HAVE_UPDWTMP) |
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| 230 | updwtmp (GDM_NEW_SESSION_RECORDS_FILE, &session_record); |
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| 231 | #elif defined(HAVE_LOGWTMP) && defined(HAVE_UT_UT_HOST) |
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| 232 | #if defined(HAVE_UT_UT_USER) |
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| 233 | logwtmp (session_record.ut_line, session_record.ut_user, session_record.ut_host); |
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| 234 | #elif defined(HAVE_UT_UT_NAME) |
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| 235 | logwtmp (session_record.ut_line, session_record.ut_name, session_record.ut_host); |
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| 236 | #endif |
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| 237 | #endif |
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| 238 | |
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| 239 | /* |
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| 240 | * Handle utmp |
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| 241 | * Update if entry already exists |
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| 242 | */ |
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| 243 | #if defined(HAVE_GETUTXENT) |
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| 244 | setutxent (); |
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| 245 | |
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| 246 | while ((u = getutxent ()) != NULL) { |
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| 247 | if (u->ut_type == USER_PROCESS && |
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| 248 | (session_record.ut_line != NULL && |
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| 249 | (strncmp (u->ut_line, session_record.ut_line, |
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| 250 | sizeof (u->ut_line)) == 0 || |
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| 251 | u->ut_pid == session_record.ut_pid))) { |
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| 252 | g_debug ("Updating existing utmp record"); |
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| 253 | pututxline (&session_record); |
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| 254 | break; |
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| 255 | } |
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| 256 | } |
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| 257 | endutxent (); |
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| 258 | |
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| 259 | /* Add new entry if update did not work */ |
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| 260 | if (u == NULL) { |
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| 261 | g_debug ("Adding new utmp record"); |
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| 262 | pututxline (&session_record); |
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| 263 | } |
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| 264 | #elif defined(HAVE_LOGIN) |
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| 265 | login (&session_record); |
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| 266 | #endif |
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| 267 | } |
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| 268 | |
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| 269 | void |
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| 270 | gdm_session_record_logout (GPid session_pid, |
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| 271 | const char *user_name, |
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| 272 | const char *host_name, |
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| 273 | const char *x11_display_name, |
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| 274 | const char *display_device) |
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| 275 | { |
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| 276 | UTMP session_record = { 0 }; |
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| 277 | UTMP *u; |
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| 278 | |
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| 279 | g_debug ("Writing logout record"); |
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| 280 | |
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| 281 | #if defined(HAVE_UT_UT_TYPE) |
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| 282 | session_record.ut_type = DEAD_PROCESS; |
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| 283 | g_debug ("using ut_type DEAD_PROCESS"); |
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| 284 | #endif |
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| 285 | |
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| 286 | record_set_timestamp (&session_record); |
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| 287 | record_set_pid (&session_record, session_pid); |
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| 288 | /* Set ut_id to the $DISPLAY value */ |
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| 289 | record_set_id (&session_record, x11_display_name); |
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| 290 | record_set_host (&session_record, x11_display_name, host_name); |
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| 291 | record_set_line (&session_record, display_device, x11_display_name); |
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| 292 | |
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| 293 | |
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| 294 | /* Handle wtmp */ |
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| 295 | g_debug ("Writing wtmp logout record to " GDM_NEW_SESSION_RECORDS_FILE); |
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| 296 | #if defined(HAVE_UPDWTMPX) |
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| 297 | updwtmpx (GDM_NEW_SESSION_RECORDS_FILE, &session_record); |
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| 298 | #elif defined (HAVE_UPDWTMP) |
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| 299 | updwtmp (GDM_NEW_SESSION_RECORDS_FILE, &session_record); |
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| 300 | #elif defined(HAVE_LOGWTMP) |
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| 301 | logwtmp (session_record.ut_line, "", ""); |
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| 302 | #endif |
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| 303 | |
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| 304 | /* Handle utmp */ |
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| 305 | #if defined(HAVE_GETUTXENT) |
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| 306 | setutxent (); |
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| 307 | |
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| 308 | while ((u = getutxent ()) != NULL && |
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| 309 | (u = getutxid (&session_record)) != NULL) { |
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| 310 | |
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| 311 | g_debug ("Removing utmp record"); |
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| 312 | if (u->ut_pid == session_pid && |
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| 313 | u->ut_type == DEAD_PROCESS) { |
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| 314 | /* Already done */ |
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| 315 | break; |
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| 316 | } |
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| 317 | |
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| 318 | u->ut_type = DEAD_PROCESS; |
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| 319 | #if defined(HAVE_UT_UT_TV) |
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| 320 | u->ut_tv.tv_sec = session_record.ut_tv.tv_sec; |
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| 321 | u->ut_tv.tv_usec = session_record.ut_tv.tv_usec; |
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| 322 | #elif defined(HAVE_UT_UT_TIME) |
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| 323 | u->ut_time = session_record.ut_time; |
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| 324 | #endif |
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| 325 | #ifdef HAVE_UT_UT_EXIT_E_TERMINATION |
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| 326 | u->ut_exit.e_termination = 0; |
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| 327 | u->ut_exit.e_exit = 0; |
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| 328 | #endif |
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| 329 | |
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| 330 | pututxline (u); |
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| 331 | |
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| 332 | break; |
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| 333 | } |
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| 334 | |
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| 335 | endutxent (); |
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| 336 | #elif defined(HAVE_LOGOUT) |
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| 337 | logout (session_record.ut_line); |
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| 338 | #endif |
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| 339 | } |
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| 340 | |
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| 341 | void |
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| 342 | gdm_session_record_failed (GPid session_pid, |
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| 343 | const char *user_name, |
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| 344 | const char *host_name, |
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| 345 | const char *x11_display_name, |
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| 346 | const char *display_device) |
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| 347 | { |
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| 348 | UTMP session_record = { 0 }; |
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| 349 | |
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| 350 | record_set_username (&session_record, user_name); |
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| 351 | |
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| 352 | g_debug ("Writing failed session attempt record"); |
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| 353 | |
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| 354 | #if defined(HAVE_UT_UT_TYPE) |
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| 355 | session_record.ut_type = USER_PROCESS; |
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| 356 | g_debug ("using ut_type USER_PROCESS"); |
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| 357 | #endif |
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| 358 | |
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| 359 | record_set_timestamp (&session_record); |
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| 360 | record_set_pid (&session_record, session_pid); |
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| 361 | /* Set ut_id to the $DISPLAY value */ |
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| 362 | record_set_id (&session_record, x11_display_name); |
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| 363 | record_set_host (&session_record, x11_display_name, host_name); |
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| 364 | record_set_line (&session_record, display_device, x11_display_name); |
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| 365 | |
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| 366 | /* Handle btmp */ |
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| 367 | g_debug ("Writing btmp failed session attempt record to " |
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| 368 | GDM_BAD_SESSION_RECORDS_FILE); |
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| 369 | |
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| 370 | #if defined(HAVE_UPDWTMPX) |
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| 371 | updwtmpx (GDM_BAD_SESSION_RECORDS_FILE, &session_record); |
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| 372 | #elif defined(HAVE_UPDWTMP) |
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| 373 | updwtmp(GDM_BAD_SESSION_RECORDS_FILE, &session_record); |
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| 374 | #endif |
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| 375 | |
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| 376 | } |
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