citadel/modules/rwho/serv_rwho.c

   1 /*
   2  * This module implements server commands related to the display and
   3  * manipulation of the "Who's online" list.
   4  *
   5  * Copyright (c) 1987-2019 by the citadel.org team
   6  *
   7  * This program is open source software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 3.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  */
  16
  17 #include "sysdep.h"
  18 #include <stdlib.h>
  19 #include <unistd.h>
  20 #include <stdio.h>
  21 #include <fcntl.h>
  22 #include <signal.h>
  23 #include <pwd.h>
  24 #include <errno.h>
  25 #include <sys/types.h>
  26
  27 #if TIME_WITH_SYS_TIME
  28 # include <sys/time.h>
  29 # include <time.h>
  30 #else
  31 # if HAVE_SYS_TIME_H
  32 #  include <sys/time.h>
  33 # else
  34 #  include <time.h>
  35 # endif
  36 #endif
  37
  38 #include <sys/wait.h>
  39 #include <string.h>
  40 #include <limits.h>
  41 #include <libcitadel.h>
  42 #include "citadel.h"
  43 #include "server.h"
  44 #include "citserver.h"
  45 #include "support.h"
  46 #include "config.h"
  47 #include "control.h"
  48 #include "user_ops.h"
  49 #include "database.h"
  50 #include "msgbase.h"
  51
  52
  53 #include "ctdl_module.h"
  54
  55 /* Don't show the names of private rooms unless the viewing
  56  * user also knows the rooms.
  57  */
  58 void GenerateRoomDisplay(char *real_room,
  59                         CitContext *viewed,
  60                         CitContext *viewer) {
  61
  62         int ra;
  63
  64         strcpy(real_room, viewed->room.QRname);
  65         if (viewed->room.QRflags & QR_MAILBOX) {
  66                 strcpy(real_room, &real_room[11]);
  67         }
  68         if (viewed->room.QRflags & QR_PRIVATE) {
  69                 CtdlRoomAccess(&viewed->room, &viewer->user, &ra, NULL);
  70                 if ( (ra & UA_KNOWN) == 0) {
  71                         strcpy(real_room, " ");
  72                 }
  73         }
  74
  75         if (viewed->cs_flags & CS_CHAT) {
  76                 while (strlen(real_room) < 14) {
  77                         strcat(real_room, " ");
  78                 }
  79                 strcpy(&real_room[14], "<chat>");
  80         }
  81
  82 }
  83
  84
  85
  86 /*
  87  * display who's online
  88  */
  89 void cmd_rwho(char *argbuf) {
  90         struct CitContext *nptr;
  91         int nContexts, i;
  92         int spoofed = 0;
  93         int aide;
  94         char room[ROOMNAMELEN];
  95         char flags[5];
  96
  97         /* So that we don't keep the context list locked for a long time
  98          * we create a copy of it first
  99          */
 100         nptr = CtdlGetContextArray(&nContexts) ;
 101         if (!nptr)
 102         {
 103                 /* Couldn't malloc so we have to bail but stick to the protocol */
 104                 cprintf("%d%c \n", LISTING_FOLLOWS, CtdlCheckExpress() );
 105                 cprintf("000\n");
 106                 return;
 107         }
 108
 109         aide = ( (CC->user.axlevel >= AxAideU) || (CC->internal_pgm) ) ;
 110         cprintf("%d%c \n", LISTING_FOLLOWS, CtdlCheckExpress() );
 111
 112         for (i=0; i<nContexts; i++)  {
 113                 flags[0] = '\0';
 114                 spoofed = 0;
 115
 116                 if (!aide && nptr[i].state == CON_SYS)
 117                         continue;
 118
 119                 if (!aide && nptr[i].kill_me != 0)
 120                         continue;
 121
 122                 if (nptr[i].cs_flags & CS_POSTING) {
 123                         strcat(flags, "*");
 124                 }
 125                 else {
 126                         strcat(flags, ".");
 127                 }
 128
 129                 GenerateRoomDisplay(room, &nptr[i], CC);
 130
 131                 if ((aide) && (spoofed)) {
 132                         strcat(flags, "+");
 133                 }
 134
 135                 if ((nptr[i].cs_flags & CS_STEALTH) && (aide)) {
 136                         strcat(flags, "-");
 137                 }
 138
 139                 if (((nptr[i].cs_flags&CS_STEALTH)==0) || (aide)) {
 140
 141                         cprintf("%d|%s|%s|%s|%s|%ld|%s|%s|",
 142                                 nptr[i].cs_pid, nptr[i].curr_user, room,
 143                                 nptr[i].cs_host, nptr[i].cs_clientname,
 144                                 (long)(nptr[i].lastidle),
 145                                 nptr[i].lastcmdname, flags
 146                         );
 147
 148                         cprintf("|");   // no spoofed user names anymore
 149                         cprintf("|");   // no spoofed room names anymore
 150                         cprintf("|");   // no spoofed host names anymore
 151
 152                         cprintf("%d\n", nptr[i].logged_in);
 153                 }
 154         }
 155
 156         /* release our copy of the context list */
 157         free(nptr);
 158
 159         /* Now it's magic time.  Before we finish, call any EVT_RWHO hooks
 160          * so that external paging modules such as serv_icq can add more
 161          * content to the Wholist.
 162          */
 163         PerformSessionHooks(EVT_RWHO);
 164         cprintf("000\n");
 165 }
 166
 167
 168 /*
 169  * enter or exit "stealth mode"
 170  */
 171 void cmd_stel(char *cmdbuf)
 172 {
 173         int requested_mode;
 174
 175         requested_mode = extract_int(cmdbuf,0);
 176
 177         if (CtdlAccessCheck(ac_logged_in)) return;
 178
 179         if (requested_mode == 1) {
 180                 CC->cs_flags = CC->cs_flags | CS_STEALTH;
 181                 PerformSessionHooks(EVT_STEALTH);
 182         }
 183         if (requested_mode == 0) {
 184                 CC->cs_flags = CC->cs_flags & ~CS_STEALTH;
 185                 PerformSessionHooks(EVT_UNSTEALTH);
 186         }
 187
 188         cprintf("%d %d\n", CIT_OK,
 189                 ((CC->cs_flags & CS_STEALTH) ? 1 : 0) );
 190 }
 191
 192
 193 CTDL_MODULE_INIT(rwho)
 194 {
 195         if(!threading)
 196         {
 197                 CtdlRegisterProtoHook(cmd_rwho, "RWHO", "Display who is online");
 198                 CtdlRegisterProtoHook(cmd_stel, "STEL", "Enter/exit stealth mode");
 199                 //CtdlRegisterSessionHook(dead_io_check, EVT_TIMER, PRIO_QUEUE + 50);
 200
 201         }
 202
 203         /* return our module name for the log */
 204         return "rwho";
 205 }