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