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1 #include "util.h"
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2 #include "mmdf.h"
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3 #include "ch.h"
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4 #include <signal.h>
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5
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6 /*
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7 *
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8 * C H _ B B O A R D S . C
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9 *
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10 * the new BBoards channel
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11 *
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12 *
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13 * This is the channel that is used to handle Internet BBoard
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14 * distribution in an intelligent fashion. In order to run it, you
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15 * need the UCI BBoards facility installed. This requires the
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16 * establishment of a special login called ``bboards'', and the
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17 * getbbent() package.
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18 *
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19 * The idea is simple. Distribution lists get aliased to go through
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20 * this channel. Suppose that the relay (or site) using ch_bboards
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21 * subscribes to UNIX-WIZARDS. The maintainer of the list is given
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22 * the address ``dist-unix-wizards'' to send to for this relay and all
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23 * sites that it serves. The site manager then defines the following
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24 * alias in the aliases file:
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25 *
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26 * dist-unix-wizards: unix-wizards@dist-bboards
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27 *
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28 * This channel (and this channel alone) is then defined to serve the
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29 * ``dist-bboards'' host. When it gets invoked, the channel does two
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30 * things: First, if the relay itself subscribes to the BBoard (the
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31 * bb_file entry in the BBoards file is non-empty), then it delivers
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32 * the message to the file. Second, if other sites subscribe to the
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33 * BBoard, then ch_bboards will enter the message back into the queue
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34 * system using the ``bboards'' login as the sender.
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35 *
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36 * This achieves two goals: first, the incoming bandwidth of relays
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37 * is not degraded by many sites subscribing to the same BBoard;
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38 * second, if an address goes bad down the line, the relay's
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39 * ``bboards'' login gets the message back (not the originator). Since
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40 * the relay's PostMaster is assumed to monitor this mailbox, problems
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41 * can be found and corrected.
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42 *
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43 * Finally, ch_bboards can be run by a site that does not relay for
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44 * other sites. In this case, the bb_dist field is empty.
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45 *
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46 */
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47
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48 /* Unlike previous versions of ch_bboards, this version does not change
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49 * the contents of the headers of the message being re-distributed.
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50 * The following changes are made:
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51 *
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52 * Envelope: The failure address is changed to bboards@locname
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53 * Headers: Another Received: is added
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54 *
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55 *
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56 * The local copy going to the BBoard has two entries prepended to the
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57 * headers:
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58 *
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59 * BBoard-ID: n
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60 * BB-Posted: date/time
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61 *
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62 */
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63
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64 /* */
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65
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66 extern char logdfldir[];
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67
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68 extern struct ll_struct chanlog;
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69 struct ll_struct *logptr = &chanlog;
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70
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71 char *dupfpath ();
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72
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73 /* */
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74
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75 main (argc, argv)
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76 int argc;
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77 char **argv;
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78 {
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79 short retval;
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80 Chan * chanptr;
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81
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82 ll_hdinit (logptr, "BB");
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83 logptr -> ll_file = dupfpath (logptr -> ll_file, logdfldir);
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84
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85 siginit ();
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86 signal (SIGINT, SIG_IGN);
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87
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88 if ((chanptr = ch_nm2struct (*argv)) == (Chan *) NOTOK)
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89 err_abrt (RP_PARM, "unknown channel name '%s'", *argv);
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90
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91 retval = ch_bboards (argc, argv, chanptr);
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92 ll_close (logptr);
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93
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94 exit (retval);
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95 }
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96
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97 /* */
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98
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99 ch_bboards (argc, argv, chanptr)
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100 int argc;
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101 char **argv;
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102 Chan * chanptr;
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103 {
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104 #ifdef DEBUG
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105 ll_log (logptr, LLOGBTR, "ch_bboards(argc=%d,*argv='%s')", argc, *argv);
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106 #endif
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107
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108 if (rp_isbad (qu_init (argc, argv)))
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109 return RP_NO;
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110 if (rp_isbad (bb_init (chanptr)))
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111 return RP_NO;
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112
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113 if (rp_isbad (qu2bb_send ()))
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114 return RP_NO;
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115
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116 qu_end (OK);
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117 bb_end (OK);
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118
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119 return RP_OK;
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120 }
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121
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122 /* */
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123
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124 err_abrt (code, fmt, b, c, d)
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125 short code;
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126 char *fmt,
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127 *b,
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128 *c,
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129 *d;
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130 {
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131 char linebuf[LINESIZE];
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132
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133 qu_end (NOTOK);
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134 bb_end (NOTOK);
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135
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136 sprintf (linebuf, "%s%s", "[abend: %s]", fmt);
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137 ll_log (logptr, LLOGFAT, linebuf, rp_valstr (code), b, c, d);
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138 ll_close (logptr);
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139
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140 exit (code);
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141 }
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