citadel/whobbs.c

   1 /*
   2  * $Id$
   3  *
   4  * Command-line "who is online?" utility
   5  *
   6  */
   7
   8 #include "sysdep.h"
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <string.h>
  13 #include <errno.h>
  14 #include "citadel.h"
  15 #include "citadel_ipc.h"
  16 #include "citadel_dirs.h"
  17 #include "tools.h"
  18
  19 void logoff(int code)
  20 {
  21         exit(code);
  22         }
  23
  24 static void escapize(char *buf, size_t n) {
  25         char hold[512];
  26         int i;
  27
  28         strcpy(hold, buf);
  29         strcpy(buf, "");
  30
  31         for (i=0; i<strlen(hold); ++i) {
  32                 size_t tmp = strlen(buf);
  33
  34                 if (hold[i]=='<')
  35                         snprintf(&buf[tmp], n - tmp, "&lt;");
  36                 else if (hold[i]=='>')
  37                         snprintf(&buf[tmp], n - tmp, "&gt;");
  38                 else if (hold[i]==34)
  39                         snprintf(&buf[tmp], n - tmp, "&quot;");
  40                 else
  41                         snprintf(&buf[tmp], n - tmp, "%c", hold[i]);
  42         }
  43 }
  44
  45
  46
  47
  48 int main(int argc, char **argv)
  49 {
  50         char buf[512];
  51         char nodetitle[SIZ];
  52         int www = 0;
  53         int s_pid = 0;
  54         int my_pid = 0;
  55         char hostbuf[SIZ];
  56         char portbuf[SIZ];
  57         char s_user[SIZ];
  58         char s_room[SIZ];
  59         char s_host[SIZ];
  60         char s_client[SIZ];
  61         int r;                  /* IPC response code */
  62         time_t timenow;
  63         char *listing = NULL;
  64         CtdlIPC *ipc = NULL;
  65         int relh=0;
  66         int home=0;
  67         char relhome[PATH_MAX]="";
  68         char ctdldir[PATH_MAX]=CTDLDIR;
  69
  70
  71         calc_dirs_n_files(relh, home, relhome, ctdldir);
  72
  73         /* If this environment variable is set, we assume that the program
  74          * is being called as a cgi-bin from a webserver and will output
  75          * everything as HTML.
  76          */
  77         if (getenv("REQUEST_METHOD") != NULL) www = 1;
  78
  79         ipc = CtdlIPC_new(argc, argv, hostbuf, portbuf);
  80         if (!ipc) {
  81                 fprintf(stderr, "Server not available: %s\n", strerror(errno));
  82                 logoff(errno);
  83         }
  84         CtdlIPC_chat_recv(ipc, buf);
  85         if ((buf[0]!='2')&&(strncmp(buf,"551",3))) {
  86                 fprintf(stderr,"%s: %s\n",argv[0],&buf[4]);
  87                 logoff(atoi(buf));
  88                 }
  89         strcpy(nodetitle, "this Citadel site");
  90         r = CtdlIPCServerInfo(ipc, buf);
  91         if (r / 100 == 1) {
  92                 my_pid = ipc->ServInfo.pid;
  93                 strcpy(nodetitle, ipc->ServInfo.humannode);
  94         }
  95
  96         if (www) {
  97                 printf( "Content-type: text/html\n"
  98                         "\n"
  99                         "<HTML><HEAD>"
 100                         "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"60\">\n"
 101                         "<TITLE>");
 102                 printf("%s: who is online", nodetitle);
 103                 printf( "</TITLE></HEAD><BODY><H1>");
 104         } else {
 105                 printf("            ");
 106         }
 107
 108         if (www) {
 109                 printf("<CENTER><H1>");
 110         }
 111
 112         printf("Users currently logged on to %s\n", nodetitle);
 113
 114         if (www) {
 115                 printf("</H1>\n");
 116         }
 117
 118         r = CtdlIPCOnlineUsers(ipc, &listing, &timenow, buf);
 119         if (r / 100 != 1) {
 120                 fprintf(stderr,"%s: %s\n",argv[0], buf);
 121                 logoff(atoi(buf));
 122         }
 123
 124         if (www) {
 125                 printf( "<TABLE BORDER=1 WIDTH=100%%>"
 126                         "<TR><TH>Session</TH><TH>User name</TH>"
 127                         "<TH>Room</TH><TH>From host</TH>"
 128                         "<TH>Client software</TH></TR>\n");
 129         } else {
 130
 131                 printf( "Session         User name               "
 132                         "Room                  From host\n");
 133                 printf( "------- ------------------------- "
 134                         "------------------- ------------------------\n");
 135         }
 136
 137
 138         while (strlen(listing) > 0) {
 139                 extract_token(buf, listing, 0, '\n', sizeof buf);
 140                 remove_token(listing, 0, '\n');
 141
 142                 /* Escape some stuff if we're using www mode */
 143                 if (www) escapize(buf, sizeof buf);
 144
 145                 s_pid = extract_int(buf,0);
 146                 extract_token(s_user, buf, 1, '|', sizeof s_user);
 147                 extract_token(s_room, buf, 2, '|', sizeof s_room);
 148                 extract_token(s_host, buf, 3, '|', sizeof s_host);
 149                 extract_token(s_client, buf, 4, '|', sizeof s_client);
 150                 if (s_pid != my_pid) {
 151
 152                         if (www) printf("<TR><TD>");
 153                         printf("%-7d", s_pid);
 154                         printf("%c",
 155                                 ((s_pid == my_pid) ? '*' : ' '));
 156                         if (www) printf("</TD><TD>");
 157                         printf("%-26s", s_user);
 158                         if (www) printf("</TD><TD>");
 159                         printf("%-19s ", s_room);
 160                         if (www) printf("</TD><TD>");
 161                         printf("%-24s\n", s_host);
 162                         if (www) printf("</TD><TD>%s</TD></TR>\n", s_client);
 163                         }
 164                 }
 165         free(listing);
 166
 167         if (www) printf("</TABLE></CENTER>\n"
 168                         "<FONT SIZE=-1>"
 169                         "(This display will automatically refresh "
 170                         "once per minute)</FONT>\n"
 171                         "</BODY></HTML>\n");
 172
 173         r = CtdlIPCQuit(ipc);
 174         return (r / 100 == 2) ? 0 : r;
 175 }
 176
 177
 178 #ifndef HAVE_STRERROR
 179 /*
 180  * replacement strerror() for systems that don't have it
 181  */
 182 char *strerror(int e)
 183 {
 184         static char buf[32];
 185
 186         snprintf(buf, sizeof buf, "errno = %d",e);
 187         return(buf);
 188         }
 189 #endif