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0
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1 /* rmail.c - replacement for /bin/rmail */
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2 #ifndef lint
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3 static char ident[] = "@(#)$Id$";
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4 #endif lint
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5
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6 /* This program has a long, long history. It started as UCB's rmail, and
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7 was then modified by OBrien@Rand-Unix to run with MMDF. Then DpK@Brl
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8 re-wrote it, and SmB@Unc hacked it up a bit. After that
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9 MRose.UCI@Rand-Relay upgraded it to use the nifty MF (mail filtering)
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10 system. Finally, the latter stripped it down to work with MH.
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11
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12 This program should be used ONLY if you have both "mts mh" and "uucp on"
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13 set in your MH configuration.
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14 */
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15
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16
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17 #include "../h/mh.h"
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18 #include "../h/addrsbr.h"
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19 #include "../zotnet/mf.h"
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20 #include "../zotnet/tws.h"
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21 #include <stdio.h>
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22 #include "../zotnet/mts.h"
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23 #include <signal.h>
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24 #ifdef LOCALE
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25 #include <locale.h>
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26 #endif
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27
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28
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29 #define ADDROK 0 /* okay to use post to deliver message */
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30 #define UUCP 1 /* okay to use uux to deliver message */
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31 #define RETURN 2 /* message loses */
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32
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33 /* */
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34 int pbroke; /* broken-pipe flag */
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35 int rtnflag; /* note was sent back */
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36
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37 char date[BUFSIZ]; /* date of origination from uucp header */
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38 char from[BUFSIZ]; /* accumulated path of sender */
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39 char origsys[BUFSIZ]; /* originating system */
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40 char origpath[BUFSIZ]; /* path from us to originating system */
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41 char usrfrm[BUFSIZ]; /* the 822 version of from[] */
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42 char Mailsys[BUFSIZ]; /* address of the mail agent */
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43 char overseer[BUFSIZ]; /* address of the watchdog */
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44
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45 char mmdf[BUFSIZ]; /* filtered mail file */
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46
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47 char *rtnmessage[] = {
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48 " Your message has been intercepted trying to access\n",
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49 "a restricted access host (e.g. an ARPANET host). A copy\n",
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50 "of your message has been sent to the system administrators.\n",
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51 "The text of your message follows.\n\n",
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52 NULL
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53 };
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54
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55 char rtnbegin[] =
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56 " ---------------- Returned Mail Follows --------------\n";
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57 char rtnend[] =
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58 " --------------- End of Returned Mail ---------------\n";
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59
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60 char *oopsmessage[] = {
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61 "\n\n\tThe system administrators (%s) have been informed of\n",
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62 "the problem, but have not been given a copy of your message.\n\n",
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63 NULL
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64 };
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65
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66 FILE * fromf; /* UUCP "From lines */
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67 FILE * msgf; /* message text */
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68 FILE * pipef; /* output for "post" or "uux" */
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69
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70
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71 int pipeser ();
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72
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73
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74 off_t lseek ();
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75
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76 /* */
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77
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78 main (argc, argv)
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79 int argc;
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80 char **argv;
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81 {
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82 int cpyback;
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83 char *cp,
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84 *fromptr,
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85 fromwhom[BUFSIZ],
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86 linebuf[BUFSIZ],
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87 sys[BUFSIZ];
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88
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89 #ifdef LOCALE
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90 setlocale(LC_ALL, "");
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91 #endif
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92 #ifdef JAPAN
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93 ml_init();
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94 #endif /* JAPAN */
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95 invo_name = r1bindex (*argv, '/');
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96 m_foil (NULLCP);
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97 mts_init (invo_name);
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98
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99 if (argc < 2)
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100 adios (NULLCP, "usage: %s user [user ...]", invo_name);
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101 (void) umask (0);
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102 (void) setgid (1);
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103 (void) setuid (1);
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104
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105 (void) sprintf (Mailsys, "%s@%s", Mailer, LocalName ());
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106 if (Overseer == NULL)
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107 Overseer = Mailsys;
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108 if (index (Overseer, '@') == NULL) {
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109 (void) sprintf (overseer, "%s@%s", Overseer, LocalName ());
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110 Overseer = overseer;
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111 }
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112
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113 (void) mktemp (Errtmp);
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114 if (freopen (Errtmp, "w", stderr) == NULL)
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115 adios (Errtmp, "unable to create");
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116 (void) dup2 (fileno (stderr), fileno (stdout));
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117
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118 (void) mktemp (Msgtmp);
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119 if ((msgf = fdopen (creat (Msgtmp, Tmpmode), "w")) == NULL)
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120 adios (Msgtmp, "unable to create");
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121
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122 (void) mktemp (Fromtmp);
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123 if ((fromf = fdopen (creat (Fromtmp, Tmpmode), "w")) == NULL)
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124 adios (Fromtmp, "unable to create");
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125
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126 /* */
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127
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128 for (;;) {
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129 if (fgets (linebuf, sizeof linebuf, stdin) == NULL)
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130 break;
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131 if (strncmp (linebuf, "From ", 5)
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132 && strncmp (linebuf, ">From ", 6))
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133 break;
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134
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135 if (linebuf[0] != '>')
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136 fputs (">", fromf);
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137 fputs (linebuf, fromf);
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138 cp = index (linebuf, ' ');
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139 fromptr = ++cp;
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140 cp = index (cp, ' ');
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141 *cp++ = NULL;
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142 (void) strcpy (fromwhom, fromptr);
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143 (void) strncpy (date, cp, 24);
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144
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145 for (;;) {
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146 if ((cp = index (cp + 1, 'r')) == NULL) {
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147 if ((cp = rindex (fromwhom, '!')) != NULL) {
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148 char *p;
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149 *cp = NULL;
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150 if ((p = rindex (fromwhom, '!')) != NULL)
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151 (void) strcpy (origsys, p + 1);
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152 else
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153 (void) strcpy (origsys, fromwhom);
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154 (void) strcat (from, fromwhom);
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155 (void) strcat (from, "!");
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156 (void) strcpy (fromwhom, cp + 1);
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157 goto out;
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158 }
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159 (void) strcpy (sys, SystemName ());
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160 (void) strcat (from, sys);
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161 (void) strcpy (origsys, sys);
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162 (void) strcat (from, "!");
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163 goto out;
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164 }
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165 if (strncmp (cp, "remote from ", 12) == 0)
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166 break;
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167 }
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168
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169 (void) sscanf (cp, "remote from %s", sys);
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170 (void) strcat (from, sys);
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171 (void) strcpy (origsys, sys);
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172 (void) strcat (from, "!");
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173 out: ;
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174 }
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175 if (fromwhom[0] == NULL)
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176 adios (NULLCP, "no from line");
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177
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178 /* */
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179
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180 (void) strcpy (origpath, from);
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181 (void) strcat (from, fromwhom);
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182 get_mmdf_addr (from, usrfrm);
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183 if ((cp = rindex (usrfrm, '<')) != NULL) {
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184 (void) strcpy (usrfrm, ++cp); /* sigh */
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185 if ((cp = rindex (usrfrm, '>')) != NULL)
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186 *cp = NULL;
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187 }
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188 if (usrfrm[0] == NULL)
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189 (void) sprintf (usrfrm, "%s!%s%%%s@%s%c",
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190 SystemName (), from, UucpChan (), LocalName (), NULL);
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191
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192 fputs (linebuf, msgf);
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193 if (txtcpy (stdin, msgf) == NOTOK)
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194 fputs ("\n *** Problem during receipt from UUCP ***\n", msgf);
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195
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196 (void) freopen (Msgtmp, "r", msgf);
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197 (void) freopen (Fromtmp, "r", fromf);
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198 (void) unlink (Fromtmp);
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199 mmdf[0] = NULL;
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200
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201 cpyback = 0;
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202 for (argv++; --argc > 0;) {
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203 rewind (fromf);
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204 rewind (msgf);
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205 rtnflag = 0;
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206 if (deliver (*argv++) == NOTOK && !rtnflag)
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207 cpyback++;
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208 }
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209
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210 (void) fflush (stderr);
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211 (void) fflush (stdout);
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212
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213 if (cpyback) {
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214 rcpy ();
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215 zcpy ();
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216 }
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217
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218 (void) unlink (Msgtmp);
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219 if (mmdf[0])
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220 (void) unlink (mmdf);
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221 (void) unlink (Errtmp);
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222
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223 exit (0);
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224 }
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225
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226 /* */
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227
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228 deliver (to)
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229 char *to;
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230 {
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231 int i,
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232 replyval;
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233 char tmpfil[BUFSIZ];
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234
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235 switch (adrcheck (to)) {
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236 case ADDROK:
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237 if (mmdf[0] == NULL && filter () == NOTOK)
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238 (void) strcpy (mmdf, Msgtmp);
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239 replyval = xpost (to, mmdf);
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240 break;
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241
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242 case UUCP:
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243 if ((replyval = xuucp (to)) == NOTOK)
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244 break;
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245
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246 if ((replyval = txtcpy (fromf, pipef)) != NOTOK)
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247 replyval = txtcpy (msgf, pipef);
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248 i = (pclose (pipef) >> 8) & 0xff;
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249 if (replyval != NOTOK)
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250 replyval = (i != 0 ? NOTOK : OK);
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251 break;
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252
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253 /* */
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254
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255 case RETURN:
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256 rtnflag++;
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257 switch (adrcheck (from)) {
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258 case ADDROK:
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259 case RETURN:
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260 (void) strcpy (tmpfil, "/tmp/rmailXXXXXX");
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261 (void) unlink (mktemp (tmpfil));
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262 if ((pipef = fdopen (creat (tmpfil, Tmpmode), "w")) == NULL)
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263 return NOTOK;
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264
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265 fprintf (pipef, "Date: %s\nFrom: %s\n",
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266 dtimenow (), Mailsys);
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267 fprintf (pipef, "To: %s\ncc: %s\n", from, Overseer);
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268 rtnmesg (to);
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269 (void) fclose (pipef);
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270
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271 replyval = xpost (from, tmpfil);
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272 (void) unlink (tmpfil);
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273 break;
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274
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275 case UUCP:
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276 if ((replyval = xuucp (from)) == NOTOK)
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277 break;
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278
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279 fprintf (pipef, "To: %s\ncc: %s\n", from, Overseer);
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280 rtnmesg (to);
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281 i = (pclose (pipef) >> 8) & 0xff;
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282 if (replyval != NOTOK)
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283 replyval = (i != 0 ? NOTOK : OK);
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284 break;
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285 }
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286 if (Syscpy) {
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287 (void) strcpy (tmpfil, "/tmp/rmailXXXXXX");
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288 (void) unlink (mktemp (tmpfil));
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289 if ((pipef = fdopen (creat (tmpfil, Tmpmode), "w")) == NULL)
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290 return NOTOK;
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291
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292 fprintf (pipef, "Date: %s\nFrom: %s\n",
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293 dtimenow (), Mailsys);
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294 fprintf (pipef, "To: %s\ncc: %s\n", usrfrm, Overseer);
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295 rtnmesg (to);
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296 (void) fclose (pipef);
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297
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298 replyval = xpost (Overseer, tmpfil);
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299 (void) unlink (tmpfil);
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300 }
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301 break;
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302 }
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303
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304 return replyval;
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305 }
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306
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307 /* */
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308
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309 adrcheck (adr)
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310 char *adr;
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311 {
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312 int type;
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313 char *cp,
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314 host[BUFSIZ];
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315 struct mailname *mp;
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316
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317 if ((cp = getname (adr)) == NULL)
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318 return RETURN;
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319 mp = getm (cp, NULLCP, 0, AD_HOST, NULLCP);
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320 while (getname (""))
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321 continue;
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322 if (mp == NULL)
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323 return RETURN;
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324
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325 type = mp -> m_type;
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326 (void) strcpy (host, mp -> m_host);
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327 mnfree (mp);
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328 if (mp -> m_mbox == NULL)
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329 return RETURN;
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330
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331 switch (type) {
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332 case LOCALHOST:
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333 return ADDROK;
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334
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335 case UUCPHOST:
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336 return (strcmp (host, SystemName ()) ? UUCP : ADDROK);
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337
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338 default:
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339 if (lookup (origsys, Okhosts) == OK)
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340 return ADDROK;
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341 return (okhost (host) == NOTOK ? RETURN : ADDROK);
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342 }
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343 }
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344
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345 /* */
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346
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347 okhost (host)
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348 char *host;
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349 {
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350 return (lookup (origsys, Okhosts) == OK
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351 || lookup (host, Okhosts) == OK
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352 || lookup (host, Okdests) == OK ? OK : NOTOK);
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353 }
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354
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355
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356 lookup (what, where)
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357 char *what,
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358 *where;
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359 {
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360 char *cp,
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361 entry[BUFSIZ];
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362 FILE * lookf;
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363
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364 if ((lookf = fopen (where, "r")) == NULL)
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365 return NOTOK;
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366 while (fgets (entry, sizeof entry, lookf) != NULL) {
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367 cp = entry;
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368 while (*cp != '\n' && *cp != ' ' && *cp != '\t')
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369 cp++;
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370 *cp = NULL;
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371 if (uleq (what, entry)) {
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372 (void) fclose (lookf);
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373 return OK;
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374 }
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375 }
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376 (void) fclose (lookf);
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377
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378 return NOTOK;
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379 }
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380
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381
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382 /* */
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383
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384 rtnmesg (badadr)
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385 char *badadr;
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386 {
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387 int i;
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388
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389 fprintf (pipef, "Subject: Illegal Address (%s)\n\n", badadr);
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390 for (i = 0; rtnmessage[i]; i++)
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391 fputs (rtnmessage[i], pipef);
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392 fputs (rtnbegin, pipef);
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393
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394 rewind (fromf);
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395 (void) txtcpy (fromf, pipef);
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396 rewind (msgf);
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397 (void) txtcpy (msgf, pipef);
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398
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399 fputs (rtnend, pipef);
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400 }
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401
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402
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403 txtcpy (frm, to)
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404 FILE * frm, *to;
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405 {
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406 int nread;
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407 char buffer[BUFSIZ];
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408
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409 while (!pbroke
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410 && (nread = fread (buffer, sizeof (*buffer), BUFSIZ, frm)) > 0)
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411 (void) fwrite (buffer, sizeof (*buffer), nread, to);
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412
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413 return (ferror (frm) ? NOTOK : OK);
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414 }
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415
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416 /* */
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417
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418 xpost (addr, file)
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419 char *addr,
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420 *file;
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421 {
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422 int i,
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423 child_id;
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424
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425 for (i = 0; (child_id = fork ()) == NOTOK && i < 5; i++)
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426 sleep (5);
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|
427 switch (child_id) {
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|
|
428 case NOTOK:
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|
429 return NOTOK;
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|
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430
|
|
|
431 case OK:
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|
|
432 execlp (postproc, r1bindex (postproc, '/'),
|
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433 "-deliver", addr, file, NULLCP);
|
|
|
434 fprintf (stderr, "unable to exec ");
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|
|
435 perror (postproc);
|
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|
436 _exit (1);
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|
|
437
|
|
|
438 default:
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|
|
439 return (pidwait (child_id, OK) ? NOTOK : OK);
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|
440 }
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|
|
441 }
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|
|
442
|
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|
443 /* */
|
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|
444
|
|
|
445 xuucp (to)
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|
446 char *to;
|
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|
447 {
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448 char *cp,
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|
449 buffer[BUFSIZ],
|
|
|
450 cmdstr[BUFSIZ];
|
|
|
451
|
|
|
452 (void) strcpy (buffer, to);
|
|
|
453 if (cp = index (buffer, '!'))
|
|
|
454 *cp++ = NULL;
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|
|
455 else {
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|
|
456 fprintf (stderr, "internal error -- %s has no host\n", to);
|
|
|
457 return NOTOK;
|
|
|
458 }
|
|
|
459 (void) sprintf (cmdstr, "uux -p %s!rmail \\(%s\\)", buffer, cp);
|
|
|
460
|
|
|
461 if ((pipef = popen (cmdstr, "w")) == NULL)
|
|
|
462 return NOTOK;
|
|
|
463
|
|
|
464 (void) signal (SIGPIPE, pipeser);
|
|
|
465 pbroke = 0;
|
|
|
466
|
|
|
467 return OK;
|
|
|
468 }
|
|
|
469
|
|
|
470 /* */
|
|
|
471
|
|
|
472 #ifdef BSD42
|
|
|
473 /* ARGSUSED */
|
|
|
474 #endif BSD42
|
|
|
475
|
|
|
476 static int pipeser (i)
|
|
|
477 int i;
|
|
|
478 {
|
|
|
479 #ifndef BSD42
|
|
|
480 (void) signal (i, SIG_IGN);
|
|
|
481 #endif BSD42
|
|
|
482
|
|
|
483 pbroke = 1;
|
|
|
484 }
|
|
|
485
|
|
|
486 /* */
|
|
|
487
|
|
|
488 rcpy () {
|
|
|
489 int i;
|
|
|
490 char buffer[BUFSIZ],
|
|
|
491 tmpfil[BUFSIZ];
|
|
|
492 FILE * fp;
|
|
|
493
|
|
|
494 (void) strcpy (tmpfil, "/tmp/rmailXXXXXX");
|
|
|
495 (void) unlink (mktemp (tmpfil));
|
|
|
496 if ((pipef = fdopen (creat (tmpfil, Tmpmode), "w")) == NULL)
|
|
|
497 return;
|
|
|
498
|
|
|
499 fprintf (pipef, "Date: %s\nFrom: %s\n", dtimenow (), Mailsys);
|
|
|
500 fprintf (pipef, "To: %s\n", usrfrm);
|
|
|
501 fprintf (pipef, "\nProblems sending mail:\n\n");
|
|
|
502 i = 0;
|
|
|
503 if ((fp = fopen (Errtmp, "r")) != NULL) {
|
|
|
504 while (fgets (buffer, sizeof buffer, fp) != NULL) {
|
|
|
505 if (ferror (pipef))
|
|
|
506 break;
|
|
|
507 fputs (buffer, pipef);
|
|
|
508 i++;
|
|
|
509 }
|
|
|
510 }
|
|
|
511 if (i == 0)
|
|
|
512 fprintf (pipef, "\tunknown problem\n");
|
|
|
513 for (i = 0; oopsmessage[i]; i++)
|
|
|
514 fprintf (pipef, oopsmessage[i], Overseer);
|
|
|
515 fputs (rtnbegin, pipef);
|
|
|
516
|
|
|
517 rewind (fromf);
|
|
|
518 (void) txtcpy (fromf, pipef);
|
|
|
519 rewind (msgf);
|
|
|
520 (void) txtcpy (msgf, pipef);
|
|
|
521
|
|
|
522 fputs (rtnend, pipef);
|
|
|
523 (void) fclose (pipef);
|
|
|
524
|
|
|
525 (void) xpost (usrfrm, tmpfil);
|
|
|
526 (void) unlink (tmpfil);
|
|
|
527 }
|
|
|
528
|
|
|
529 /* */
|
|
|
530
|
|
|
531 zcpy () {
|
|
|
532 int i;
|
|
|
533 char buffer[BUFSIZ],
|
|
|
534 tmpfil[BUFSIZ];
|
|
|
535 FILE * fp;
|
|
|
536
|
|
|
537 (void) strcpy (tmpfil, "/tmp/rmailXXXXXX");
|
|
|
538 (void) unlink (mktemp (tmpfil));
|
|
|
539 if ((pipef = fdopen (creat (tmpfil, Tmpmode), "w")) == NULL)
|
|
|
540 return;
|
|
|
541
|
|
|
542 fprintf (pipef, "Date: %s\nFrom: %s\n", dtimenow (), Mailsys);
|
|
|
543 fprintf (pipef, "To: %s\n", Mailsys);
|
|
|
544 fprintf (pipef, "\nProblems sending mail for %s (aka %s):\n\n",
|
|
|
545 from, usrfrm);
|
|
|
546
|
|
|
547 i = 0;
|
|
|
548 if ((fp = fopen (Errtmp, "r")) != NULL) {
|
|
|
549 while (fgets (buffer, sizeof buffer, fp) != NULL) {
|
|
|
550 if (ferror (pipef))
|
|
|
551 break;
|
|
|
552 fputs (buffer, pipef);
|
|
|
553 i = 1;
|
|
|
554 }
|
|
|
555 (void) fclose (fp);
|
|
|
556 if (i == 0)
|
|
|
557 fprintf (pipef, "\tunknown problem\n");
|
|
|
558 }
|
|
|
559 else
|
|
|
560 fprintf (pipef, "\tunable to open %s\n", Errtmp);
|
|
|
561 (void) fclose (pipef);
|
|
|
562
|
|
|
563 (void) xpost (Mailsys, tmpfil);
|
|
|
564 (void) unlink (tmpfil);
|
|
|
565 }
|
|
|
566
|
|
|
567 /* */
|
|
|
568
|
|
|
569 filter () {
|
|
|
570 int i,
|
|
|
571 fd,
|
|
|
572 td;
|
|
|
573 char tmpfil[BUFSIZ],
|
|
|
574 mmdfil[BUFSIZ];
|
|
|
575 FILE * out;
|
|
|
576
|
|
|
577 (void) strcpy (tmpfil, "/tmp/rmailXXXXXX");
|
|
|
578 (void) unlink (mktemp (tmpfil));
|
|
|
579 if ((fd = creat (tmpfil, Tmpmode)) == NOTOK)
|
|
|
580 return NOTOK;
|
|
|
581 (void) close (fd);
|
|
|
582 if ((fd = open (tmpfil, 2)) == NOTOK)
|
|
|
583 return NOTOK;
|
|
|
584 if ((out = fdopen (fd, "w")) == NULL) {
|
|
|
585 (void) close (fd);
|
|
|
586 return NOTOK;
|
|
|
587 }
|
|
|
588 if ((td = dup (fd)) == NOTOK) {
|
|
|
589 (void) close (fd);
|
|
|
590 return NOTOK;
|
|
|
591 }
|
|
|
592
|
|
|
593 fprintf (out, "From %s %s\n", from, date);
|
|
|
594 if (txtcpy (msgf, out) == NOTOK) {
|
|
|
595 (void) close (fd);
|
|
|
596 (void) close (td);
|
|
|
597 return NOTOK;
|
|
|
598 }
|
|
|
599 (void) fclose (out);
|
|
|
600 (void) lseek (td, (off_t)0, 0);
|
|
|
601
|
|
|
602 (void) strcpy (mmdfil, "/tmp/mmdfXXXXXX");
|
|
|
603 (void) unlink (mktemp (mmdfil));
|
|
|
604 if ((fd = creat (mmdfil, Tmpmode)) == NOTOK) {
|
|
|
605 (void) close (td);
|
|
|
606 (void) unlink (tmpfil);
|
|
|
607 return NOTOK;
|
|
|
608 }
|
|
|
609 if ((fd = open (mmdfil, 2)) == NOTOK) {
|
|
|
610 (void) close (td);
|
|
|
611 (void) unlink (tmpfil);
|
|
|
612 return NOTOK;
|
|
|
613 }
|
|
|
614
|
|
|
615 /* */
|
|
|
616
|
|
|
617 switch (i = uucp2mmdf (td, fd, TRUE)) {
|
|
|
618 case OK:
|
|
|
619 (void) strcpy (mmdf, mmdfil);
|
|
|
620 break;
|
|
|
621
|
|
|
622 default:
|
|
|
623 mmdf[0] = NULL;
|
|
|
624 break;
|
|
|
625 }
|
|
|
626 (void) close (td);
|
|
|
627 (void) unlink (tmpfil);
|
|
|
628 (void) close (fd);
|
|
|
629
|
|
|
630 return (i != OK ? NOTOK : OK);
|
|
|
631 }
|
|
|
632
|
|
|
633 /* */
|
|
|
634
|
|
|
635 get_mmdf_addr (addr, to)
|
|
|
636 char *addr,
|
|
|
637 *to;
|
|
|
638 {
|
|
|
639 struct adrx *adrxp;
|
|
|
640
|
|
|
641 *to = NULL;
|
|
|
642 if ((adrxp = seekadrx (addr)) == NULL)
|
|
|
643 return;
|
|
|
644
|
|
|
645 addr_convert (adrxp, to, TRUE);
|
|
|
646 while (seekadrx (NULLCP))
|
|
|
647 continue;
|
|
|
648 }
|
