citadel/whobbs.c

   1 /*
   2  * $Id$
   3  *
   4  * Command-line "who is online?" utility
   5  *
   6  */
   7
   8 #include <stdlib.h>
   9 #include <unistd.h>
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include "citadel.h"
  13 #include "ipc.h"
  14 #include "tools.h"
  15
  16 void logoff(int code)
  17 {
  18         exit(code);
  19         }
  20
  21 static void escapize(char *buf, size_t n) {
  22         char hold[512];
  23         int i;
  24
  25         strcpy(hold, buf);
  26         strcpy(buf, "");
  27
  28         for (i=0; i<strlen(hold); ++i) {
  29                 size_t tmp = strlen(buf);
  30
  31                 if (hold[i]=='<')
  32                         snprintf(&buf[tmp], n - tmp, "&lt;");
  33                 else if (hold[i]=='>')
  34                         snprintf(&buf[tmp], n - tmp, "&gt;");
  35                 else if (hold[i]==34)
  36                         snprintf(&buf[tmp], n - tmp, "&quot;");
  37                 else
  38                         snprintf(&buf[tmp], n - tmp, "%c", hold[i]);
  39         }
  40 }
  41
  42
  43
  44
  45 int main(int argc, char **argv)
  46 {
  47         char buf[512];
  48         char nodetitle[SIZ];
  49         int a;
  50         int www = 0;
  51         int s_pid = 0;
  52         int my_pid = 0;
  53         char hostbuf[SIZ];
  54         char portbuf[SIZ];
  55         char s_user[SIZ];
  56         char s_room[SIZ];
  57         char s_host[SIZ];
  58         char s_client[SIZ];
  59
  60         /* If this environment variable is set, we assume that the program
  61          * is being called as a cgi-bin from a webserver and will output
  62          * everything as HTML.
  63          */
  64         if (getenv("REQUEST_METHOD") != NULL) www = 1;
  65
  66         attach_to_server(argc, argv, hostbuf, portbuf);
  67         serv_gets(buf);
  68         if ((buf[0]!='2')&&(strncmp(buf,"551",3))) {
  69                 fprintf(stderr,"%s: %s\n",argv[0],&buf[4]);
  70                 logoff(atoi(buf));
  71                 }
  72         strcpy(nodetitle, "this BBS");
  73         serv_puts("INFO");
  74         serv_gets(buf);
  75         if (buf[0]=='1') {
  76                 a = 0;
  77                 while (serv_gets(buf), strcmp(buf,"000")) {
  78                         if (a==0) my_pid = atoi(buf);
  79                         if (a==2) strcpy(nodetitle, buf);
  80                         ++a;
  81                         }
  82                 }
  83
  84         if (www) {
  85                 printf( "Content-type: text/html\n"
  86                         "\n"
  87                         "<HTML><HEAD>"
  88                         "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"60\">\n"
  89                         "<TITLE>");
  90                 printf("%s: who is online", nodetitle);
  91                 printf( "</TITLE></HEAD><BODY><H1>");
  92         } else {
  93                 printf("            ");
  94         }
  95
  96         if (www) {
  97                 printf("<CENTER><H1>");
  98         }
  99
 100         printf("Users currently logged on to %s\n", nodetitle);
 101
 102         if (www) {
 103                 printf("</H1>\n");
 104         }
 105
 106         serv_puts("RWHO");
 107         serv_gets(buf);
 108         if (buf[0]!='1') {
 109                 fprintf(stderr,"%s: %s\n",argv[0],&buf[4]);
 110                 logoff(atoi(buf));
 111         }
 112
 113         if (www) {
 114                 printf( "<TABLE BORDER=1 WIDTH=100%%>"
 115                         "<TR><TH>Session</TH><TH>User name</TH>"
 116                         "<TH>Room</TH><TH>From host</TH>"
 117                         "<TH>Client software</TH></TR>\n");
 118         } else {
 119
 120                 printf( "Session         User name               "
 121                         "Room                  From host\n");
 122                 printf( "------- ------------------------- "
 123                         "-------------------- ------------------------\n");
 124         }
 125
 126
 127         while (serv_gets(buf), strcmp(buf,"000")) {
 128
 129                 /* Escape some stuff if we're using www mode */
 130                 if (www) escapize(buf, sizeof buf);
 131
 132                 s_pid = extract_int(buf,0);
 133                 extract(s_user,buf,1);
 134                 extract(s_room,buf,2);
 135                 extract(s_host,buf,3);
 136                 extract(s_client,buf,4);
 137                 if (s_pid != my_pid) {
 138
 139                         if (www) printf("<TR><TD>");
 140                         printf("%-7d", s_pid);
 141                         printf("%c",
 142                                 ((s_pid == my_pid) ? '*' : ' '));
 143                         if (www) printf("</TD><TD>");
 144                         printf("%-25s", s_user);
 145                         if (www) printf("</TD><TD>");
 146                         printf("%-20s ", s_room);
 147                         if (www) printf("</TD><TD>");
 148                         printf("%-24s\n", s_host);
 149                         if (www) printf("</TD><TD>%s</TD></TR>\n", s_client);
 150                         }
 151                 }
 152
 153         if (www) printf("</TABLE></CENTER>\n"
 154                         "<FONT SIZE=-1>"
 155                         "(This display will automatically refresh "
 156                         "once per minute)</FONT>\n"
 157                         "</BODY></HTML>\n");
 158
 159         serv_puts("QUIT");
 160         serv_gets(buf);
 161         return 0;
 162         }
 163
 164
 165 #ifndef HAVE_STRERROR
 166 /*
 167  * replacement strerror() for systems that don't have it
 168  */
 169 char *strerror(int e)
 170 {
 171         static char buf[32];
 172
 173         snprintf(buf, sizeof buf, "errno = %d",e);
 174         return(buf);
 175         }
 176 #endif