1 | /* |
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2 | * Copyright (c) 1998-2003 Sendmail, Inc. and its suppliers. |
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3 | * All rights reserved. |
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4 | * Copyright (c) 1995-1997 Eric P. Allman. All rights reserved. |
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5 | * Copyright (c) 1988, 1993 |
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6 | * The Regents of the University of California. All rights reserved. |
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7 | * |
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8 | * By using this file, you agree to the terms and conditions set |
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9 | * forth in the LICENSE file which can be found at the top level of |
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10 | * the sendmail distribution. |
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11 | * |
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12 | */ |
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13 | |
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14 | #include <sendmail.h> |
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15 | |
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16 | SM_RCSID("@(#)$Id: mci.c,v 1.1.1.1 2003-04-08 15:08:45 zacheiss Exp $") |
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17 | |
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18 | #if NETINET || NETINET6 |
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19 | # include <arpa/inet.h> |
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20 | #endif /* NETINET || NETINET6 */ |
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21 | |
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22 | #include <dirent.h> |
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23 | |
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24 | static int mci_generate_persistent_path __P((const char *, char *, |
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25 | int, bool)); |
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26 | static bool mci_load_persistent __P((MCI *)); |
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27 | static void mci_uncache __P((MCI **, bool)); |
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28 | static int mci_lock_host_statfile __P((MCI *)); |
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29 | static int mci_read_persistent __P((SM_FILE_T *, MCI *)); |
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30 | |
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31 | /* |
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32 | ** Mail Connection Information (MCI) Caching Module. |
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33 | ** |
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34 | ** There are actually two separate things cached. The first is |
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35 | ** the set of all open connections -- these are stored in a |
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36 | ** (small) list. The second is stored in the symbol table; it |
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37 | ** has the overall status for all hosts, whether or not there |
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38 | ** is a connection open currently. |
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39 | ** |
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40 | ** There should never be too many connections open (since this |
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41 | ** could flood the socket table), nor should a connection be |
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42 | ** allowed to sit idly for too long. |
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43 | ** |
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44 | ** MaxMciCache is the maximum number of open connections that |
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45 | ** will be supported. |
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46 | ** |
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47 | ** MciCacheTimeout is the time (in seconds) that a connection |
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48 | ** is permitted to survive without activity. |
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49 | ** |
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50 | ** We actually try any cached connections by sending a NOOP |
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51 | ** before we use them; if the NOOP fails we close down the |
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52 | ** connection and reopen it. Note that this means that a |
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53 | ** server SMTP that doesn't support NOOP will hose the |
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54 | ** algorithm -- but that doesn't seem too likely. |
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55 | ** |
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56 | ** The persistent MCI code is donated by Mark Lovell and Paul |
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57 | ** Vixie. It is based on the long term host status code in KJS |
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58 | ** written by Paul but has been adapted by Mark to fit into the |
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59 | ** MCI structure. |
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60 | */ |
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61 | |
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62 | static MCI **MciCache; /* the open connection cache */ |
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63 | |
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64 | /* |
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65 | ** MCI_CACHE -- enter a connection structure into the open connection cache |
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66 | ** |
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67 | ** This may cause something else to be flushed. |
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68 | ** |
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69 | ** Parameters: |
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70 | ** mci -- the connection to cache. |
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71 | ** |
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72 | ** Returns: |
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73 | ** none. |
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74 | */ |
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75 | |
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76 | void |
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77 | mci_cache(mci) |
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78 | register MCI *mci; |
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79 | { |
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80 | register MCI **mcislot; |
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81 | |
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82 | /* |
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83 | ** Find the best slot. This may cause expired connections |
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84 | ** to be closed. |
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85 | */ |
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86 | |
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87 | mcislot = mci_scan(mci); |
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88 | if (mcislot == NULL) |
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89 | { |
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90 | /* we don't support caching */ |
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91 | return; |
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92 | } |
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93 | |
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94 | if (mci->mci_host == NULL) |
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95 | return; |
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96 | |
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97 | /* if this is already cached, we are done */ |
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98 | if (bitset(MCIF_CACHED, mci->mci_flags)) |
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99 | return; |
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100 | |
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101 | /* otherwise we may have to clear the slot */ |
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102 | if (*mcislot != NULL) |
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103 | mci_uncache(mcislot, true); |
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104 | |
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105 | if (tTd(42, 5)) |
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106 | sm_dprintf("mci_cache: caching %p (%s) in slot %d\n", |
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107 | mci, mci->mci_host, (int) (mcislot - MciCache)); |
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108 | if (tTd(91, 100)) |
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109 | sm_syslog(LOG_DEBUG, CurEnv->e_id, |
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110 | "mci_cache: caching %lx (%.100s) in slot %d", |
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111 | (unsigned long) mci, mci->mci_host, |
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112 | (int) (mcislot - MciCache)); |
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113 | |
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114 | *mcislot = mci; |
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115 | mci->mci_flags |= MCIF_CACHED; |
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116 | } |
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117 | /* |
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118 | ** MCI_SCAN -- scan the cache, flush junk, and return best slot |
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119 | ** |
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120 | ** Parameters: |
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121 | ** savemci -- never flush this one. Can be null. |
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122 | ** |
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123 | ** Returns: |
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124 | ** The LRU (or empty) slot. |
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125 | */ |
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126 | |
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127 | MCI ** |
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128 | mci_scan(savemci) |
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129 | MCI *savemci; |
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130 | { |
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131 | time_t now; |
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132 | register MCI **bestmci; |
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133 | register MCI *mci; |
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134 | register int i; |
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135 | |
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136 | if (MaxMciCache <= 0) |
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137 | { |
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138 | /* we don't support caching */ |
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139 | return NULL; |
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140 | } |
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141 | |
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142 | if (MciCache == NULL) |
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143 | { |
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144 | /* first call */ |
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145 | MciCache = (MCI **) sm_pmalloc_x(MaxMciCache * sizeof *MciCache); |
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146 | memset((char *) MciCache, '\0', MaxMciCache * sizeof *MciCache); |
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147 | return &MciCache[0]; |
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148 | } |
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149 | |
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150 | now = curtime(); |
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151 | bestmci = &MciCache[0]; |
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152 | for (i = 0; i < MaxMciCache; i++) |
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153 | { |
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154 | mci = MciCache[i]; |
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155 | if (mci == NULL || mci->mci_state == MCIS_CLOSED) |
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156 | { |
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157 | bestmci = &MciCache[i]; |
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158 | continue; |
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159 | } |
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160 | if ((mci->mci_lastuse + MciCacheTimeout <= now || |
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161 | (mci->mci_mailer != NULL && |
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162 | mci->mci_mailer->m_maxdeliveries > 0 && |
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163 | mci->mci_deliveries + 1 >= mci->mci_mailer->m_maxdeliveries))&& |
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164 | mci != savemci) |
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165 | { |
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166 | /* connection idle too long or too many deliveries */ |
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167 | bestmci = &MciCache[i]; |
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168 | |
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169 | /* close it */ |
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170 | mci_uncache(bestmci, true); |
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171 | continue; |
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172 | } |
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173 | if (*bestmci == NULL) |
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174 | continue; |
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175 | if (mci->mci_lastuse < (*bestmci)->mci_lastuse) |
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176 | bestmci = &MciCache[i]; |
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177 | } |
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178 | return bestmci; |
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179 | } |
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180 | /* |
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181 | ** MCI_UNCACHE -- remove a connection from a slot. |
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182 | ** |
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183 | ** May close a connection. |
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184 | ** |
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185 | ** Parameters: |
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186 | ** mcislot -- the slot to empty. |
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187 | ** doquit -- if true, send QUIT protocol on this connection. |
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188 | ** if false, we are assumed to be in a forked child; |
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189 | ** all we want to do is close the file(s). |
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190 | ** |
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191 | ** Returns: |
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192 | ** none. |
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193 | */ |
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194 | |
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195 | static void |
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196 | mci_uncache(mcislot, doquit) |
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197 | register MCI **mcislot; |
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198 | bool doquit; |
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199 | { |
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200 | register MCI *mci; |
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201 | extern ENVELOPE BlankEnvelope; |
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202 | |
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203 | mci = *mcislot; |
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204 | if (mci == NULL) |
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205 | return; |
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206 | *mcislot = NULL; |
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207 | if (mci->mci_host == NULL) |
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208 | return; |
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209 | |
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210 | mci_unlock_host(mci); |
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211 | |
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212 | if (tTd(42, 5)) |
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213 | sm_dprintf("mci_uncache: uncaching %p (%s) from slot %d (%d)\n", |
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214 | mci, mci->mci_host, (int) (mcislot - MciCache), |
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215 | doquit); |
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216 | if (tTd(91, 100)) |
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217 | sm_syslog(LOG_DEBUG, CurEnv->e_id, |
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218 | "mci_uncache: uncaching %lx (%.100s) from slot %d (%d)", |
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219 | (unsigned long) mci, mci->mci_host, |
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220 | (int) (mcislot - MciCache), doquit); |
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221 | |
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222 | mci->mci_deliveries = 0; |
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223 | if (doquit) |
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224 | { |
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225 | message("Closing connection to %s", mci->mci_host); |
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226 | |
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227 | mci->mci_flags &= ~MCIF_CACHED; |
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228 | |
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229 | /* only uses the envelope to flush the transcript file */ |
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230 | if (mci->mci_state != MCIS_CLOSED) |
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231 | smtpquit(mci->mci_mailer, mci, &BlankEnvelope); |
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232 | #if XLA |
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233 | xla_host_end(mci->mci_host); |
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234 | #endif /* XLA */ |
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235 | } |
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236 | else |
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237 | { |
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238 | if (mci->mci_in != NULL) |
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239 | (void) sm_io_close(mci->mci_in, SM_TIME_DEFAULT); |
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240 | if (mci->mci_out != NULL) |
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241 | (void) sm_io_close(mci->mci_out, SM_TIME_DEFAULT); |
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242 | mci->mci_in = mci->mci_out = NULL; |
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243 | mci->mci_state = MCIS_CLOSED; |
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244 | mci->mci_exitstat = EX_OK; |
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245 | mci->mci_errno = 0; |
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246 | mci->mci_flags = 0; |
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247 | |
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248 | mci->mci_retryrcpt = false; |
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249 | mci->mci_tolist = NULL; |
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250 | #if PIPELINING |
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251 | mci->mci_okrcpts = 0; |
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252 | #endif /* PIPELINING */ |
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253 | } |
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254 | |
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255 | SM_FREE_CLR(mci->mci_status); |
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256 | SM_FREE_CLR(mci->mci_rstatus); |
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257 | SM_FREE_CLR(mci->mci_heloname); |
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258 | if (mci->mci_rpool != NULL) |
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259 | { |
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260 | sm_rpool_free(mci->mci_rpool); |
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261 | mci->mci_macro.mac_rpool = NULL; |
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262 | mci->mci_rpool = NULL; |
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263 | } |
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264 | } |
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265 | /* |
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266 | ** MCI_FLUSH -- flush the entire cache |
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267 | ** |
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268 | ** Parameters: |
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269 | ** doquit -- if true, send QUIT protocol. |
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270 | ** if false, just close the connection. |
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271 | ** allbut -- but leave this one open. |
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272 | ** |
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273 | ** Returns: |
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274 | ** none. |
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275 | */ |
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276 | |
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277 | void |
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278 | mci_flush(doquit, allbut) |
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279 | bool doquit; |
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280 | MCI *allbut; |
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281 | { |
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282 | register int i; |
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283 | |
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284 | if (MciCache == NULL) |
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285 | return; |
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286 | |
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287 | for (i = 0; i < MaxMciCache; i++) |
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288 | { |
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289 | if (allbut != MciCache[i]) |
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290 | mci_uncache(&MciCache[i], doquit); |
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291 | } |
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292 | } |
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293 | /* |
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294 | ** MCI_GET -- get information about a particular host |
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295 | ** |
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296 | ** Parameters: |
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297 | ** host -- host to look for. |
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298 | ** m -- mailer. |
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299 | ** |
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300 | ** Returns: |
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301 | ** mci for this host (might be new). |
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302 | */ |
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303 | |
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304 | MCI * |
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305 | mci_get(host, m) |
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306 | char *host; |
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307 | MAILER *m; |
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308 | { |
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309 | register MCI *mci; |
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310 | register STAB *s; |
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311 | extern SOCKADDR CurHostAddr; |
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312 | |
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313 | /* clear CurHostAddr so we don't get a bogus address with this name */ |
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314 | memset(&CurHostAddr, '\0', sizeof CurHostAddr); |
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315 | |
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316 | /* clear out any expired connections */ |
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317 | (void) mci_scan(NULL); |
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318 | |
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319 | if (m->m_mno < 0) |
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320 | syserr("!negative mno %d (%s)", m->m_mno, m->m_name); |
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321 | |
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322 | s = stab(host, ST_MCI + m->m_mno, ST_ENTER); |
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323 | mci = &s->s_mci; |
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324 | |
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325 | /* initialize per-message data */ |
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326 | mci->mci_retryrcpt = false; |
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327 | mci->mci_tolist = NULL; |
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328 | #if PIPELINING |
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329 | mci->mci_okrcpts = 0; |
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330 | #endif /* PIPELINING */ |
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331 | |
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332 | if (mci->mci_rpool == NULL) |
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333 | mci->mci_rpool = sm_rpool_new_x(NULL); |
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334 | |
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335 | if (mci->mci_macro.mac_rpool == NULL) |
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336 | mci->mci_macro.mac_rpool = mci->mci_rpool; |
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337 | |
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338 | /* |
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339 | ** We don't need to load the persistent data if we have data |
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340 | ** already loaded in the cache. |
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341 | */ |
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342 | |
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343 | if (mci->mci_host == NULL && |
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344 | (mci->mci_host = s->s_name) != NULL && |
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345 | !mci_load_persistent(mci)) |
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346 | { |
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347 | if (tTd(42, 2)) |
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348 | sm_dprintf("mci_get(%s %s): lock failed\n", |
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349 | host, m->m_name); |
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350 | mci->mci_exitstat = EX_TEMPFAIL; |
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351 | mci->mci_state = MCIS_CLOSED; |
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352 | mci->mci_statfile = NULL; |
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353 | return mci; |
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354 | } |
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355 | |
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356 | if (tTd(42, 2)) |
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357 | { |
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358 | sm_dprintf("mci_get(%s %s): mci_state=%d, _flags=%lx, _exitstat=%d, _errno=%d\n", |
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359 | host, m->m_name, mci->mci_state, mci->mci_flags, |
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360 | mci->mci_exitstat, mci->mci_errno); |
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361 | } |
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362 | |
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363 | if (mci->mci_state == MCIS_OPEN) |
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364 | { |
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365 | /* poke the connection to see if it's still alive */ |
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366 | (void) smtpprobe(mci); |
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367 | |
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368 | /* reset the stored state in the event of a timeout */ |
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369 | if (mci->mci_state != MCIS_OPEN) |
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370 | { |
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371 | mci->mci_errno = 0; |
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372 | mci->mci_exitstat = EX_OK; |
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373 | mci->mci_state = MCIS_CLOSED; |
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374 | } |
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375 | else |
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376 | { |
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377 | /* get peer host address */ |
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378 | /* (this should really be in the mci struct) */ |
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379 | SOCKADDR_LEN_T socklen = sizeof CurHostAddr; |
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380 | |
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381 | (void) getpeername(sm_io_getinfo(mci->mci_in, |
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382 | SM_IO_WHAT_FD, NULL), |
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383 | (struct sockaddr *) &CurHostAddr, &socklen); |
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384 | } |
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385 | } |
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386 | if (mci->mci_state == MCIS_CLOSED) |
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387 | { |
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388 | time_t now = curtime(); |
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389 | |
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390 | /* if this info is stale, ignore it */ |
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391 | if (mci->mci_lastuse + MciInfoTimeout <= now) |
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392 | { |
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393 | mci->mci_lastuse = now; |
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394 | mci->mci_errno = 0; |
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395 | mci->mci_exitstat = EX_OK; |
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396 | } |
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397 | } |
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398 | |
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399 | return mci; |
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400 | } |
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401 | /* |
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402 | ** MCI_NEW -- allocate new MCI structure |
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403 | ** |
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404 | ** Parameters: |
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405 | ** rpool -- if non-NULL: allocate from that rpool. |
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406 | ** |
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407 | ** Returns: |
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408 | ** mci (new). |
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409 | */ |
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410 | |
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411 | MCI * |
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412 | mci_new(rpool) |
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413 | SM_RPOOL_T *rpool; |
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414 | { |
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415 | register MCI *mci; |
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416 | |
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417 | if (rpool == NULL) |
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418 | mci = (MCI *) sm_malloc_x(sizeof *mci); |
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419 | else |
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420 | mci = (MCI *) sm_rpool_malloc_x(rpool, sizeof *mci); |
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421 | memset((char *) mci, '\0', sizeof *mci); |
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422 | mci->mci_rpool = sm_rpool_new_x(NULL); |
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423 | mci->mci_macro.mac_rpool = mci->mci_rpool; |
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424 | return mci; |
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425 | } |
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426 | /* |
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427 | ** MCI_MATCH -- check connection cache for a particular host |
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428 | ** |
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429 | ** Parameters: |
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430 | ** host -- host to look for. |
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431 | ** m -- mailer. |
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432 | ** |
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433 | ** Returns: |
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434 | ** true iff open connection exists. |
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435 | */ |
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436 | |
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437 | bool |
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438 | mci_match(host, m) |
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439 | char *host; |
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440 | MAILER *m; |
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441 | { |
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442 | register MCI *mci; |
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443 | register STAB *s; |
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444 | |
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445 | if (m->m_mno < 0 || m->m_mno > MAXMAILERS) |
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446 | return false; |
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447 | s = stab(host, ST_MCI + m->m_mno, ST_FIND); |
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448 | if (s == NULL) |
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449 | return false; |
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450 | |
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451 | mci = &s->s_mci; |
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452 | return mci->mci_state == MCIS_OPEN; |
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453 | } |
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454 | /* |
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455 | ** MCI_SETSTAT -- set status codes in MCI structure. |
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456 | ** |
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457 | ** Parameters: |
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458 | ** mci -- the MCI structure to set. |
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459 | ** xstat -- the exit status code. |
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460 | ** dstat -- the DSN status code. |
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461 | ** rstat -- the SMTP status code. |
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462 | ** |
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463 | ** Returns: |
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464 | ** none. |
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465 | */ |
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466 | |
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467 | void |
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468 | mci_setstat(mci, xstat, dstat, rstat) |
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469 | MCI *mci; |
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470 | int xstat; |
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471 | char *dstat; |
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472 | char *rstat; |
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473 | { |
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474 | /* protocol errors should never be interpreted as sticky */ |
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475 | if (xstat != EX_NOTSTICKY && xstat != EX_PROTOCOL) |
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476 | mci->mci_exitstat = xstat; |
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477 | |
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478 | SM_FREE_CLR(mci->mci_status); |
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479 | if (dstat != NULL) |
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480 | mci->mci_status = sm_strdup_x(dstat); |
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481 | |
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482 | SM_FREE_CLR(mci->mci_rstatus); |
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483 | if (rstat != NULL) |
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484 | mci->mci_rstatus = sm_strdup_x(rstat); |
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485 | } |
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486 | /* |
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487 | ** MCI_DUMP -- dump the contents of an MCI structure. |
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488 | ** |
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489 | ** Parameters: |
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490 | ** mci -- the MCI structure to dump. |
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491 | ** |
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492 | ** Returns: |
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493 | ** none. |
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494 | ** |
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495 | ** Side Effects: |
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496 | ** none. |
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497 | */ |
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498 | |
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499 | struct mcifbits |
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500 | { |
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501 | int mcif_bit; /* flag bit */ |
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502 | char *mcif_name; /* flag name */ |
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503 | }; |
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504 | static struct mcifbits MciFlags[] = |
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505 | { |
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506 | { MCIF_VALID, "VALID" }, |
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507 | { MCIF_CACHED, "CACHED" }, |
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508 | { MCIF_ESMTP, "ESMTP" }, |
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509 | { MCIF_EXPN, "EXPN" }, |
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510 | { MCIF_SIZE, "SIZE" }, |
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511 | { MCIF_8BITMIME, "8BITMIME" }, |
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512 | { MCIF_7BIT, "7BIT" }, |
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513 | { MCIF_INHEADER, "INHEADER" }, |
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514 | { MCIF_CVT8TO7, "CVT8TO7" }, |
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515 | { MCIF_DSN, "DSN" }, |
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516 | { MCIF_8BITOK, "8BITOK" }, |
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517 | { MCIF_CVT7TO8, "CVT7TO8" }, |
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518 | { MCIF_INMIME, "INMIME" }, |
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519 | { MCIF_AUTH, "AUTH" }, |
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520 | { MCIF_AUTHACT, "AUTHACT" }, |
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521 | { MCIF_ENHSTAT, "ENHSTAT" }, |
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522 | { MCIF_PIPELINED, "PIPELINED" }, |
---|
523 | #if STARTTLS |
---|
524 | { MCIF_TLS, "TLS" }, |
---|
525 | { MCIF_TLSACT, "TLSACT" }, |
---|
526 | #endif /* STARTTLS */ |
---|
527 | { MCIF_DLVR_BY, "DLVR_BY" }, |
---|
528 | { 0, NULL } |
---|
529 | }; |
---|
530 | |
---|
531 | void |
---|
532 | mci_dump(mci, logit) |
---|
533 | register MCI *mci; |
---|
534 | bool logit; |
---|
535 | { |
---|
536 | register char *p; |
---|
537 | char *sep; |
---|
538 | char buf[4000]; |
---|
539 | |
---|
540 | sep = logit ? " " : "\n\t"; |
---|
541 | p = buf; |
---|
542 | (void) sm_snprintf(p, SPACELEFT(buf, p), "MCI@%p: ", mci); |
---|
543 | p += strlen(p); |
---|
544 | if (mci == NULL) |
---|
545 | { |
---|
546 | (void) sm_snprintf(p, SPACELEFT(buf, p), "NULL"); |
---|
547 | goto printit; |
---|
548 | } |
---|
549 | (void) sm_snprintf(p, SPACELEFT(buf, p), "flags=%lx", mci->mci_flags); |
---|
550 | p += strlen(p); |
---|
551 | if (mci->mci_flags != 0) |
---|
552 | { |
---|
553 | struct mcifbits *f; |
---|
554 | |
---|
555 | *p++ = '<'; |
---|
556 | for (f = MciFlags; f->mcif_bit != 0; f++) |
---|
557 | { |
---|
558 | if (!bitset(f->mcif_bit, mci->mci_flags)) |
---|
559 | continue; |
---|
560 | (void) sm_strlcpyn(p, SPACELEFT(buf, p), 2, |
---|
561 | f->mcif_name, ","); |
---|
562 | p += strlen(p); |
---|
563 | } |
---|
564 | p[-1] = '>'; |
---|
565 | } |
---|
566 | |
---|
567 | /* Note: sm_snprintf() takes care of NULL arguments for %s */ |
---|
568 | (void) sm_snprintf(p, SPACELEFT(buf, p), |
---|
569 | ",%serrno=%d, herrno=%d, exitstat=%d, state=%d, pid=%d,%s", |
---|
570 | sep, mci->mci_errno, mci->mci_herrno, |
---|
571 | mci->mci_exitstat, mci->mci_state, (int) mci->mci_pid, sep); |
---|
572 | p += strlen(p); |
---|
573 | (void) sm_snprintf(p, SPACELEFT(buf, p), |
---|
574 | "maxsize=%ld, phase=%s, mailer=%s,%s", |
---|
575 | mci->mci_maxsize, mci->mci_phase, |
---|
576 | mci->mci_mailer == NULL ? "NULL" : mci->mci_mailer->m_name, |
---|
577 | sep); |
---|
578 | p += strlen(p); |
---|
579 | (void) sm_snprintf(p, SPACELEFT(buf, p), |
---|
580 | "status=%s, rstatus=%s,%s", |
---|
581 | mci->mci_status, mci->mci_rstatus, sep); |
---|
582 | p += strlen(p); |
---|
583 | (void) sm_snprintf(p, SPACELEFT(buf, p), |
---|
584 | "host=%s, lastuse=%s", |
---|
585 | mci->mci_host, ctime(&mci->mci_lastuse)); |
---|
586 | printit: |
---|
587 | if (logit) |
---|
588 | sm_syslog(LOG_DEBUG, CurEnv->e_id, "%.1000s", buf); |
---|
589 | else |
---|
590 | (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "%s\n", buf); |
---|
591 | } |
---|
592 | /* |
---|
593 | ** MCI_DUMP_ALL -- print the entire MCI cache |
---|
594 | ** |
---|
595 | ** Parameters: |
---|
596 | ** logit -- if set, log the result instead of printing |
---|
597 | ** to stdout. |
---|
598 | ** |
---|
599 | ** Returns: |
---|
600 | ** none. |
---|
601 | */ |
---|
602 | |
---|
603 | void |
---|
604 | mci_dump_all(logit) |
---|
605 | bool logit; |
---|
606 | { |
---|
607 | register int i; |
---|
608 | |
---|
609 | if (MciCache == NULL) |
---|
610 | return; |
---|
611 | |
---|
612 | for (i = 0; i < MaxMciCache; i++) |
---|
613 | mci_dump(MciCache[i], logit); |
---|
614 | } |
---|
615 | /* |
---|
616 | ** MCI_LOCK_HOST -- Lock host while sending. |
---|
617 | ** |
---|
618 | ** If we are contacting a host, we'll need to |
---|
619 | ** update the status information in the host status |
---|
620 | ** file, and if we want to do that, we ought to have |
---|
621 | ** locked it. This has the (according to some) |
---|
622 | ** desirable effect of serializing connectivity with |
---|
623 | ** remote hosts -- i.e.: one connection to a given |
---|
624 | ** host at a time. |
---|
625 | ** |
---|
626 | ** Parameters: |
---|
627 | ** mci -- containing the host we want to lock. |
---|
628 | ** |
---|
629 | ** Returns: |
---|
630 | ** EX_OK -- got the lock. |
---|
631 | ** EX_TEMPFAIL -- didn't get the lock. |
---|
632 | */ |
---|
633 | |
---|
634 | int |
---|
635 | mci_lock_host(mci) |
---|
636 | MCI *mci; |
---|
637 | { |
---|
638 | if (mci == NULL) |
---|
639 | { |
---|
640 | if (tTd(56, 1)) |
---|
641 | sm_dprintf("mci_lock_host: NULL mci\n"); |
---|
642 | return EX_OK; |
---|
643 | } |
---|
644 | |
---|
645 | if (!SingleThreadDelivery) |
---|
646 | return EX_OK; |
---|
647 | |
---|
648 | return mci_lock_host_statfile(mci); |
---|
649 | } |
---|
650 | |
---|
651 | static int |
---|
652 | mci_lock_host_statfile(mci) |
---|
653 | MCI *mci; |
---|
654 | { |
---|
655 | int save_errno = errno; |
---|
656 | int retVal = EX_OK; |
---|
657 | char fname[MAXPATHLEN]; |
---|
658 | |
---|
659 | if (HostStatDir == NULL || mci->mci_host == NULL) |
---|
660 | return EX_OK; |
---|
661 | |
---|
662 | if (tTd(56, 2)) |
---|
663 | sm_dprintf("mci_lock_host: attempting to lock %s\n", |
---|
664 | mci->mci_host); |
---|
665 | |
---|
666 | if (mci_generate_persistent_path(mci->mci_host, fname, sizeof fname, |
---|
667 | true) < 0) |
---|
668 | { |
---|
669 | /* of course this should never happen */ |
---|
670 | if (tTd(56, 2)) |
---|
671 | sm_dprintf("mci_lock_host: Failed to generate host path for %s\n", |
---|
672 | mci->mci_host); |
---|
673 | |
---|
674 | retVal = EX_TEMPFAIL; |
---|
675 | goto cleanup; |
---|
676 | } |
---|
677 | |
---|
678 | mci->mci_statfile = safefopen(fname, O_RDWR, FileMode, |
---|
679 | SFF_NOLOCK|SFF_NOLINK|SFF_OPENASROOT|SFF_REGONLY|SFF_SAFEDIRPATH|SFF_CREAT); |
---|
680 | |
---|
681 | if (mci->mci_statfile == NULL) |
---|
682 | { |
---|
683 | syserr("mci_lock_host: cannot create host lock file %s", fname); |
---|
684 | goto cleanup; |
---|
685 | } |
---|
686 | |
---|
687 | if (!lockfile(sm_io_getinfo(mci->mci_statfile, SM_IO_WHAT_FD, NULL), |
---|
688 | fname, "", LOCK_EX|LOCK_NB)) |
---|
689 | { |
---|
690 | if (tTd(56, 2)) |
---|
691 | sm_dprintf("mci_lock_host: couldn't get lock on %s\n", |
---|
692 | fname); |
---|
693 | (void) sm_io_close(mci->mci_statfile, SM_TIME_DEFAULT); |
---|
694 | mci->mci_statfile = NULL; |
---|
695 | retVal = EX_TEMPFAIL; |
---|
696 | goto cleanup; |
---|
697 | } |
---|
698 | |
---|
699 | if (tTd(56, 12) && mci->mci_statfile != NULL) |
---|
700 | sm_dprintf("mci_lock_host: Sanity check -- lock is good\n"); |
---|
701 | |
---|
702 | cleanup: |
---|
703 | errno = save_errno; |
---|
704 | return retVal; |
---|
705 | } |
---|
706 | /* |
---|
707 | ** MCI_UNLOCK_HOST -- unlock host |
---|
708 | ** |
---|
709 | ** Clean up the lock on a host, close the file, let |
---|
710 | ** someone else use it. |
---|
711 | ** |
---|
712 | ** Parameters: |
---|
713 | ** mci -- us. |
---|
714 | ** |
---|
715 | ** Returns: |
---|
716 | ** nothing. |
---|
717 | */ |
---|
718 | |
---|
719 | void |
---|
720 | mci_unlock_host(mci) |
---|
721 | MCI *mci; |
---|
722 | { |
---|
723 | int save_errno = errno; |
---|
724 | |
---|
725 | if (mci == NULL) |
---|
726 | { |
---|
727 | if (tTd(56, 1)) |
---|
728 | sm_dprintf("mci_unlock_host: NULL mci\n"); |
---|
729 | return; |
---|
730 | } |
---|
731 | |
---|
732 | if (HostStatDir == NULL || mci->mci_host == NULL) |
---|
733 | return; |
---|
734 | |
---|
735 | if (!SingleThreadDelivery && mci_lock_host_statfile(mci) == EX_TEMPFAIL) |
---|
736 | { |
---|
737 | if (tTd(56, 1)) |
---|
738 | sm_dprintf("mci_unlock_host: stat file already locked\n"); |
---|
739 | } |
---|
740 | else |
---|
741 | { |
---|
742 | if (tTd(56, 2)) |
---|
743 | sm_dprintf("mci_unlock_host: store prior to unlock\n"); |
---|
744 | mci_store_persistent(mci); |
---|
745 | } |
---|
746 | |
---|
747 | if (mci->mci_statfile != NULL) |
---|
748 | { |
---|
749 | (void) sm_io_close(mci->mci_statfile, SM_TIME_DEFAULT); |
---|
750 | mci->mci_statfile = NULL; |
---|
751 | } |
---|
752 | |
---|
753 | errno = save_errno; |
---|
754 | } |
---|
755 | /* |
---|
756 | ** MCI_LOAD_PERSISTENT -- load persistent host info |
---|
757 | ** |
---|
758 | ** Load information about host that is kept |
---|
759 | ** in common for all running sendmails. |
---|
760 | ** |
---|
761 | ** Parameters: |
---|
762 | ** mci -- the host/connection to load persistent info for. |
---|
763 | ** |
---|
764 | ** Returns: |
---|
765 | ** true -- lock was successful |
---|
766 | ** false -- lock failed |
---|
767 | */ |
---|
768 | |
---|
769 | static bool |
---|
770 | mci_load_persistent(mci) |
---|
771 | MCI *mci; |
---|
772 | { |
---|
773 | int save_errno = errno; |
---|
774 | bool locked = true; |
---|
775 | SM_FILE_T *fp; |
---|
776 | char fname[MAXPATHLEN]; |
---|
777 | |
---|
778 | if (mci == NULL) |
---|
779 | { |
---|
780 | if (tTd(56, 1)) |
---|
781 | sm_dprintf("mci_load_persistent: NULL mci\n"); |
---|
782 | return true; |
---|
783 | } |
---|
784 | |
---|
785 | if (IgnoreHostStatus || HostStatDir == NULL || mci->mci_host == NULL) |
---|
786 | return true; |
---|
787 | |
---|
788 | /* Already have the persistent information in memory */ |
---|
789 | if (SingleThreadDelivery && mci->mci_statfile != NULL) |
---|
790 | return true; |
---|
791 | |
---|
792 | if (tTd(56, 1)) |
---|
793 | sm_dprintf("mci_load_persistent: Attempting to load persistent information for %s\n", |
---|
794 | mci->mci_host); |
---|
795 | |
---|
796 | if (mci_generate_persistent_path(mci->mci_host, fname, sizeof fname, |
---|
797 | false) < 0) |
---|
798 | { |
---|
799 | /* Not much we can do if the file isn't there... */ |
---|
800 | if (tTd(56, 1)) |
---|
801 | sm_dprintf("mci_load_persistent: Couldn't generate host path\n"); |
---|
802 | goto cleanup; |
---|
803 | } |
---|
804 | |
---|
805 | fp = safefopen(fname, O_RDONLY, FileMode, |
---|
806 | SFF_NOLOCK|SFF_NOLINK|SFF_OPENASROOT|SFF_REGONLY|SFF_SAFEDIRPATH); |
---|
807 | if (fp == NULL) |
---|
808 | { |
---|
809 | /* I can't think of any reason this should ever happen */ |
---|
810 | if (tTd(56, 1)) |
---|
811 | sm_dprintf("mci_load_persistent: open(%s): %s\n", |
---|
812 | fname, sm_errstring(errno)); |
---|
813 | goto cleanup; |
---|
814 | } |
---|
815 | |
---|
816 | FileName = fname; |
---|
817 | locked = lockfile(sm_io_getinfo(fp, SM_IO_WHAT_FD, NULL), fname, "", |
---|
818 | LOCK_SH|LOCK_NB); |
---|
819 | if (locked) |
---|
820 | { |
---|
821 | (void) mci_read_persistent(fp, mci); |
---|
822 | (void) lockfile(sm_io_getinfo(fp, SM_IO_WHAT_FD, NULL), fname, |
---|
823 | "", LOCK_UN); |
---|
824 | } |
---|
825 | FileName = NULL; |
---|
826 | (void) sm_io_close(fp, SM_TIME_DEFAULT); |
---|
827 | |
---|
828 | cleanup: |
---|
829 | errno = save_errno; |
---|
830 | return locked; |
---|
831 | } |
---|
832 | /* |
---|
833 | ** MCI_READ_PERSISTENT -- read persistent host status file |
---|
834 | ** |
---|
835 | ** Parameters: |
---|
836 | ** fp -- the file pointer to read. |
---|
837 | ** mci -- the pointer to fill in. |
---|
838 | ** |
---|
839 | ** Returns: |
---|
840 | ** -1 -- if the file was corrupt. |
---|
841 | ** 0 -- otherwise. |
---|
842 | ** |
---|
843 | ** Warning: |
---|
844 | ** This code makes the assumption that this data |
---|
845 | ** will be read in an atomic fashion, and that the data |
---|
846 | ** was written in an atomic fashion. Any other functioning |
---|
847 | ** may lead to some form of insanity. This should be |
---|
848 | ** perfectly safe due to underlying stdio buffering. |
---|
849 | */ |
---|
850 | |
---|
851 | static int |
---|
852 | mci_read_persistent(fp, mci) |
---|
853 | SM_FILE_T *fp; |
---|
854 | register MCI *mci; |
---|
855 | { |
---|
856 | int ver; |
---|
857 | register char *p; |
---|
858 | int saveLineNumber = LineNumber; |
---|
859 | char buf[MAXLINE]; |
---|
860 | |
---|
861 | if (fp == NULL) |
---|
862 | syserr("mci_read_persistent: NULL fp"); |
---|
863 | if (mci == NULL) |
---|
864 | syserr("mci_read_persistent: NULL mci"); |
---|
865 | if (tTd(56, 93)) |
---|
866 | { |
---|
867 | sm_dprintf("mci_read_persistent: fp=%lx, mci=", |
---|
868 | (unsigned long) fp); |
---|
869 | } |
---|
870 | |
---|
871 | SM_FREE_CLR(mci->mci_status); |
---|
872 | SM_FREE_CLR(mci->mci_rstatus); |
---|
873 | |
---|
874 | sm_io_rewind(fp, SM_TIME_DEFAULT); |
---|
875 | ver = -1; |
---|
876 | LineNumber = 0; |
---|
877 | while (sm_io_fgets(fp, SM_TIME_DEFAULT, buf, sizeof buf) != NULL) |
---|
878 | { |
---|
879 | LineNumber++; |
---|
880 | p = strchr(buf, '\n'); |
---|
881 | if (p != NULL) |
---|
882 | *p = '\0'; |
---|
883 | switch (buf[0]) |
---|
884 | { |
---|
885 | case 'V': /* version stamp */ |
---|
886 | ver = atoi(&buf[1]); |
---|
887 | if (ver < 0 || ver > 0) |
---|
888 | syserr("Unknown host status version %d: %d max", |
---|
889 | ver, 0); |
---|
890 | break; |
---|
891 | |
---|
892 | case 'E': /* UNIX error number */ |
---|
893 | mci->mci_errno = atoi(&buf[1]); |
---|
894 | break; |
---|
895 | |
---|
896 | case 'H': /* DNS error number */ |
---|
897 | mci->mci_herrno = atoi(&buf[1]); |
---|
898 | break; |
---|
899 | |
---|
900 | case 'S': /* UNIX exit status */ |
---|
901 | mci->mci_exitstat = atoi(&buf[1]); |
---|
902 | break; |
---|
903 | |
---|
904 | case 'D': /* DSN status */ |
---|
905 | mci->mci_status = newstr(&buf[1]); |
---|
906 | break; |
---|
907 | |
---|
908 | case 'R': /* SMTP status */ |
---|
909 | mci->mci_rstatus = newstr(&buf[1]); |
---|
910 | break; |
---|
911 | |
---|
912 | case 'U': /* last usage time */ |
---|
913 | mci->mci_lastuse = atol(&buf[1]); |
---|
914 | break; |
---|
915 | |
---|
916 | case '.': /* end of file */ |
---|
917 | if (tTd(56, 93)) |
---|
918 | mci_dump(mci, false); |
---|
919 | return 0; |
---|
920 | |
---|
921 | default: |
---|
922 | sm_syslog(LOG_CRIT, NOQID, |
---|
923 | "%s: line %d: Unknown host status line \"%s\"", |
---|
924 | FileName == NULL ? mci->mci_host : FileName, |
---|
925 | LineNumber, buf); |
---|
926 | LineNumber = saveLineNumber; |
---|
927 | return -1; |
---|
928 | } |
---|
929 | } |
---|
930 | LineNumber = saveLineNumber; |
---|
931 | if (tTd(56, 93)) |
---|
932 | sm_dprintf("incomplete (missing dot for EOF)\n"); |
---|
933 | if (ver < 0) |
---|
934 | return -1; |
---|
935 | return 0; |
---|
936 | } |
---|
937 | /* |
---|
938 | ** MCI_STORE_PERSISTENT -- Store persistent MCI information |
---|
939 | ** |
---|
940 | ** Store information about host that is kept |
---|
941 | ** in common for all running sendmails. |
---|
942 | ** |
---|
943 | ** Parameters: |
---|
944 | ** mci -- the host/connection to store persistent info for. |
---|
945 | ** |
---|
946 | ** Returns: |
---|
947 | ** none. |
---|
948 | */ |
---|
949 | |
---|
950 | void |
---|
951 | mci_store_persistent(mci) |
---|
952 | MCI *mci; |
---|
953 | { |
---|
954 | int save_errno = errno; |
---|
955 | |
---|
956 | if (mci == NULL) |
---|
957 | { |
---|
958 | if (tTd(56, 1)) |
---|
959 | sm_dprintf("mci_store_persistent: NULL mci\n"); |
---|
960 | return; |
---|
961 | } |
---|
962 | |
---|
963 | if (HostStatDir == NULL || mci->mci_host == NULL) |
---|
964 | return; |
---|
965 | |
---|
966 | if (tTd(56, 1)) |
---|
967 | sm_dprintf("mci_store_persistent: Storing information for %s\n", |
---|
968 | mci->mci_host); |
---|
969 | |
---|
970 | if (mci->mci_statfile == NULL) |
---|
971 | { |
---|
972 | if (tTd(56, 1)) |
---|
973 | sm_dprintf("mci_store_persistent: no statfile\n"); |
---|
974 | return; |
---|
975 | } |
---|
976 | |
---|
977 | sm_io_rewind(mci->mci_statfile, SM_TIME_DEFAULT); |
---|
978 | #if !NOFTRUNCATE |
---|
979 | (void) ftruncate(sm_io_getinfo(mci->mci_statfile, SM_IO_WHAT_FD, NULL), |
---|
980 | (off_t) 0); |
---|
981 | #endif /* !NOFTRUNCATE */ |
---|
982 | |
---|
983 | (void) sm_io_fprintf(mci->mci_statfile, SM_TIME_DEFAULT, "V0\n"); |
---|
984 | (void) sm_io_fprintf(mci->mci_statfile, SM_TIME_DEFAULT, "E%d\n", |
---|
985 | mci->mci_errno); |
---|
986 | (void) sm_io_fprintf(mci->mci_statfile, SM_TIME_DEFAULT, "H%d\n", |
---|
987 | mci->mci_herrno); |
---|
988 | (void) sm_io_fprintf(mci->mci_statfile, SM_TIME_DEFAULT, "S%d\n", |
---|
989 | mci->mci_exitstat); |
---|
990 | if (mci->mci_status != NULL) |
---|
991 | (void) sm_io_fprintf(mci->mci_statfile, SM_TIME_DEFAULT, |
---|
992 | "D%.80s\n", |
---|
993 | denlstring(mci->mci_status, true, false)); |
---|
994 | if (mci->mci_rstatus != NULL) |
---|
995 | (void) sm_io_fprintf(mci->mci_statfile, SM_TIME_DEFAULT, |
---|
996 | "R%.80s\n", |
---|
997 | denlstring(mci->mci_rstatus, true, false)); |
---|
998 | (void) sm_io_fprintf(mci->mci_statfile, SM_TIME_DEFAULT, "U%ld\n", |
---|
999 | (long)(mci->mci_lastuse)); |
---|
1000 | (void) sm_io_fprintf(mci->mci_statfile, SM_TIME_DEFAULT, ".\n"); |
---|
1001 | |
---|
1002 | (void) sm_io_flush(mci->mci_statfile, SM_TIME_DEFAULT); |
---|
1003 | |
---|
1004 | errno = save_errno; |
---|
1005 | return; |
---|
1006 | } |
---|
1007 | /* |
---|
1008 | ** MCI_TRAVERSE_PERSISTENT -- walk persistent status tree |
---|
1009 | ** |
---|
1010 | ** Recursively find all the mci host files in `pathname'. Default to |
---|
1011 | ** main host status directory if no path is provided. |
---|
1012 | ** Call (*action)(pathname, host) for each file found. |
---|
1013 | ** |
---|
1014 | ** Note: all information is collected in a list before it is processed. |
---|
1015 | ** This may not be the best way to do it, but it seems safest, since |
---|
1016 | ** the file system would be touched while we are attempting to traverse |
---|
1017 | ** the directory tree otherwise (during purges). |
---|
1018 | ** |
---|
1019 | ** Parameters: |
---|
1020 | ** action -- function to call on each node. If returns < 0, |
---|
1021 | ** return immediately. |
---|
1022 | ** pathname -- root of tree. If null, use main host status |
---|
1023 | ** directory. |
---|
1024 | ** |
---|
1025 | ** Returns: |
---|
1026 | ** < 0 -- if any action routine returns a negative value, that |
---|
1027 | ** value is returned. |
---|
1028 | ** 0 -- if we successfully went to completion. |
---|
1029 | ** > 0 -- return status from action() |
---|
1030 | */ |
---|
1031 | |
---|
1032 | int |
---|
1033 | mci_traverse_persistent(action, pathname) |
---|
1034 | int (*action)(); |
---|
1035 | char *pathname; |
---|
1036 | { |
---|
1037 | struct stat statbuf; |
---|
1038 | DIR *d; |
---|
1039 | int ret; |
---|
1040 | |
---|
1041 | if (pathname == NULL) |
---|
1042 | pathname = HostStatDir; |
---|
1043 | if (pathname == NULL) |
---|
1044 | return -1; |
---|
1045 | |
---|
1046 | if (tTd(56, 1)) |
---|
1047 | sm_dprintf("mci_traverse: pathname is %s\n", pathname); |
---|
1048 | |
---|
1049 | ret = stat(pathname, &statbuf); |
---|
1050 | if (ret < 0) |
---|
1051 | { |
---|
1052 | if (tTd(56, 2)) |
---|
1053 | sm_dprintf("mci_traverse: Failed to stat %s: %s\n", |
---|
1054 | pathname, sm_errstring(errno)); |
---|
1055 | return ret; |
---|
1056 | } |
---|
1057 | if (S_ISDIR(statbuf.st_mode)) |
---|
1058 | { |
---|
1059 | bool leftone, removedone; |
---|
1060 | size_t len; |
---|
1061 | char *newptr; |
---|
1062 | struct dirent *e; |
---|
1063 | char newpath[MAXPATHLEN]; |
---|
1064 | |
---|
1065 | if ((d = opendir(pathname)) == NULL) |
---|
1066 | { |
---|
1067 | if (tTd(56, 2)) |
---|
1068 | sm_dprintf("mci_traverse: opendir %s: %s\n", |
---|
1069 | pathname, sm_errstring(errno)); |
---|
1070 | return -1; |
---|
1071 | } |
---|
1072 | len = sizeof(newpath) - MAXNAMLEN - 3; |
---|
1073 | if (sm_strlcpy(newpath, pathname, len) >= len) |
---|
1074 | { |
---|
1075 | if (tTd(56, 2)) |
---|
1076 | sm_dprintf("mci_traverse: path \"%s\" too long", |
---|
1077 | pathname); |
---|
1078 | return -1; |
---|
1079 | } |
---|
1080 | newptr = newpath + strlen(newpath); |
---|
1081 | *newptr++ = '/'; |
---|
1082 | |
---|
1083 | /* |
---|
1084 | ** repeat until no file has been removed |
---|
1085 | ** this may become ugly when several files "expire" |
---|
1086 | ** during these loops, but it's better than doing |
---|
1087 | ** a rewinddir() inside the inner loop |
---|
1088 | */ |
---|
1089 | |
---|
1090 | do |
---|
1091 | { |
---|
1092 | leftone = removedone = false; |
---|
1093 | while ((e = readdir(d)) != NULL) |
---|
1094 | { |
---|
1095 | if (e->d_name[0] == '.') |
---|
1096 | continue; |
---|
1097 | |
---|
1098 | (void) sm_strlcpy(newptr, e->d_name, |
---|
1099 | sizeof newpath - |
---|
1100 | (newptr - newpath)); |
---|
1101 | |
---|
1102 | if (StopRequest) |
---|
1103 | stop_sendmail(); |
---|
1104 | ret = mci_traverse_persistent(action, newpath); |
---|
1105 | if (ret < 0) |
---|
1106 | break; |
---|
1107 | if (ret == 1) |
---|
1108 | leftone = true; |
---|
1109 | if (!removedone && ret == 0 && |
---|
1110 | action == mci_purge_persistent) |
---|
1111 | removedone = true; |
---|
1112 | } |
---|
1113 | if (ret < 0) |
---|
1114 | break; |
---|
1115 | |
---|
1116 | /* |
---|
1117 | ** The following appears to be |
---|
1118 | ** necessary during purges, since |
---|
1119 | ** we modify the directory structure |
---|
1120 | */ |
---|
1121 | |
---|
1122 | if (removedone) |
---|
1123 | rewinddir(d); |
---|
1124 | if (tTd(56, 40)) |
---|
1125 | sm_dprintf("mci_traverse: path %s: ret %d removed %d left %d\n", |
---|
1126 | pathname, ret, removedone, leftone); |
---|
1127 | } while (removedone); |
---|
1128 | |
---|
1129 | /* purge (or whatever) the directory proper */ |
---|
1130 | if (!leftone) |
---|
1131 | { |
---|
1132 | *--newptr = '\0'; |
---|
1133 | ret = (*action)(newpath, NULL); |
---|
1134 | } |
---|
1135 | (void) closedir(d); |
---|
1136 | } |
---|
1137 | else if (S_ISREG(statbuf.st_mode)) |
---|
1138 | { |
---|
1139 | char *end = pathname + strlen(pathname) - 1; |
---|
1140 | char *start; |
---|
1141 | char *scan; |
---|
1142 | char host[MAXHOSTNAMELEN]; |
---|
1143 | char *hostptr = host; |
---|
1144 | |
---|
1145 | /* |
---|
1146 | ** Reconstruct the host name from the path to the |
---|
1147 | ** persistent information. |
---|
1148 | */ |
---|
1149 | |
---|
1150 | do |
---|
1151 | { |
---|
1152 | if (hostptr != host) |
---|
1153 | *(hostptr++) = '.'; |
---|
1154 | start = end; |
---|
1155 | while (*(start - 1) != '/') |
---|
1156 | start--; |
---|
1157 | |
---|
1158 | if (*end == '.') |
---|
1159 | end--; |
---|
1160 | |
---|
1161 | for (scan = start; scan <= end; scan++) |
---|
1162 | *(hostptr++) = *scan; |
---|
1163 | |
---|
1164 | end = start - 2; |
---|
1165 | } while (*end == '.'); |
---|
1166 | |
---|
1167 | *hostptr = '\0'; |
---|
1168 | |
---|
1169 | /* |
---|
1170 | ** Do something with the file containing the persistent |
---|
1171 | ** information. |
---|
1172 | */ |
---|
1173 | |
---|
1174 | ret = (*action)(pathname, host); |
---|
1175 | } |
---|
1176 | |
---|
1177 | return ret; |
---|
1178 | } |
---|
1179 | /* |
---|
1180 | ** MCI_PRINT_PERSISTENT -- print persistent info |
---|
1181 | ** |
---|
1182 | ** Dump the persistent information in the file 'pathname' |
---|
1183 | ** |
---|
1184 | ** Parameters: |
---|
1185 | ** pathname -- the pathname to the status file. |
---|
1186 | ** hostname -- the corresponding host name. |
---|
1187 | ** |
---|
1188 | ** Returns: |
---|
1189 | ** 0 |
---|
1190 | */ |
---|
1191 | |
---|
1192 | int |
---|
1193 | mci_print_persistent(pathname, hostname) |
---|
1194 | char *pathname; |
---|
1195 | char *hostname; |
---|
1196 | { |
---|
1197 | static bool initflag = false; |
---|
1198 | SM_FILE_T *fp; |
---|
1199 | int width = Verbose ? 78 : 25; |
---|
1200 | bool locked; |
---|
1201 | MCI mcib; |
---|
1202 | |
---|
1203 | /* skip directories */ |
---|
1204 | if (hostname == NULL) |
---|
1205 | return 0; |
---|
1206 | |
---|
1207 | if (StopRequest) |
---|
1208 | stop_sendmail(); |
---|
1209 | |
---|
1210 | if (!initflag) |
---|
1211 | { |
---|
1212 | initflag = true; |
---|
1213 | (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, |
---|
1214 | " -------------- Hostname --------------- How long ago ---------Results---------\n"); |
---|
1215 | } |
---|
1216 | |
---|
1217 | fp = safefopen(pathname, O_RDONLY, FileMode, |
---|
1218 | SFF_NOLOCK|SFF_NOLINK|SFF_OPENASROOT|SFF_REGONLY|SFF_SAFEDIRPATH); |
---|
1219 | |
---|
1220 | if (fp == NULL) |
---|
1221 | { |
---|
1222 | if (tTd(56, 1)) |
---|
1223 | sm_dprintf("mci_print_persistent: cannot open %s: %s\n", |
---|
1224 | pathname, sm_errstring(errno)); |
---|
1225 | return 0; |
---|
1226 | } |
---|
1227 | |
---|
1228 | FileName = pathname; |
---|
1229 | memset(&mcib, '\0', sizeof mcib); |
---|
1230 | if (mci_read_persistent(fp, &mcib) < 0) |
---|
1231 | { |
---|
1232 | syserr("%s: could not read status file", pathname); |
---|
1233 | (void) sm_io_close(fp, SM_TIME_DEFAULT); |
---|
1234 | FileName = NULL; |
---|
1235 | return 0; |
---|
1236 | } |
---|
1237 | |
---|
1238 | locked = !lockfile(sm_io_getinfo(fp, SM_IO_WHAT_FD, NULL), pathname, |
---|
1239 | "", LOCK_SH|LOCK_NB); |
---|
1240 | (void) sm_io_close(fp, SM_TIME_DEFAULT); |
---|
1241 | FileName = NULL; |
---|
1242 | |
---|
1243 | (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "%c%-39s %12s ", |
---|
1244 | locked ? '*' : ' ', hostname, |
---|
1245 | pintvl(curtime() - mcib.mci_lastuse, true)); |
---|
1246 | if (mcib.mci_rstatus != NULL) |
---|
1247 | (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "%.*s\n", width, |
---|
1248 | mcib.mci_rstatus); |
---|
1249 | else if (mcib.mci_exitstat == EX_TEMPFAIL && mcib.mci_errno != 0) |
---|
1250 | (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, |
---|
1251 | "Deferred: %.*s\n", width - 10, |
---|
1252 | sm_errstring(mcib.mci_errno)); |
---|
1253 | else if (mcib.mci_exitstat != 0) |
---|
1254 | { |
---|
1255 | char *exmsg = sm_sysexmsg(mcib.mci_exitstat); |
---|
1256 | |
---|
1257 | if (exmsg == NULL) |
---|
1258 | { |
---|
1259 | char buf[80]; |
---|
1260 | |
---|
1261 | (void) sm_snprintf(buf, sizeof buf, |
---|
1262 | "Unknown mailer error %d", |
---|
1263 | mcib.mci_exitstat); |
---|
1264 | (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "%.*s\n", |
---|
1265 | width, buf); |
---|
1266 | } |
---|
1267 | else |
---|
1268 | (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "%.*s\n", |
---|
1269 | width, &exmsg[5]); |
---|
1270 | } |
---|
1271 | else if (mcib.mci_errno == 0) |
---|
1272 | (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "OK\n"); |
---|
1273 | else |
---|
1274 | (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "OK: %.*s\n", |
---|
1275 | width - 4, sm_errstring(mcib.mci_errno)); |
---|
1276 | |
---|
1277 | return 0; |
---|
1278 | } |
---|
1279 | /* |
---|
1280 | ** MCI_PURGE_PERSISTENT -- Remove a persistence status file. |
---|
1281 | ** |
---|
1282 | ** Parameters: |
---|
1283 | ** pathname -- path to the status file. |
---|
1284 | ** hostname -- name of host corresponding to that file. |
---|
1285 | ** NULL if this is a directory (domain). |
---|
1286 | ** |
---|
1287 | ** Returns: |
---|
1288 | ** 0 -- ok |
---|
1289 | ** 1 -- file not deleted (too young, incorrect format) |
---|
1290 | ** < 0 -- some error occurred |
---|
1291 | */ |
---|
1292 | |
---|
1293 | int |
---|
1294 | mci_purge_persistent(pathname, hostname) |
---|
1295 | char *pathname; |
---|
1296 | char *hostname; |
---|
1297 | { |
---|
1298 | struct stat statbuf; |
---|
1299 | char *end = pathname + strlen(pathname) - 1; |
---|
1300 | int ret; |
---|
1301 | |
---|
1302 | if (tTd(56, 1)) |
---|
1303 | sm_dprintf("mci_purge_persistent: purging %s\n", pathname); |
---|
1304 | |
---|
1305 | ret = stat(pathname, &statbuf); |
---|
1306 | if (ret < 0) |
---|
1307 | { |
---|
1308 | if (tTd(56, 2)) |
---|
1309 | sm_dprintf("mci_purge_persistent: Failed to stat %s: %s\n", |
---|
1310 | pathname, sm_errstring(errno)); |
---|
1311 | return ret; |
---|
1312 | } |
---|
1313 | if (curtime() - statbuf.st_mtime <= MciInfoTimeout) |
---|
1314 | return 1; |
---|
1315 | if (hostname != NULL) |
---|
1316 | { |
---|
1317 | /* remove the file */ |
---|
1318 | ret = unlink(pathname); |
---|
1319 | if (ret < 0) |
---|
1320 | { |
---|
1321 | if (LogLevel > 8) |
---|
1322 | sm_syslog(LOG_ERR, NOQID, |
---|
1323 | "mci_purge_persistent: failed to unlink %s: %s", |
---|
1324 | pathname, sm_errstring(errno)); |
---|
1325 | if (tTd(56, 2)) |
---|
1326 | sm_dprintf("mci_purge_persistent: failed to unlink %s: %s\n", |
---|
1327 | pathname, sm_errstring(errno)); |
---|
1328 | return ret; |
---|
1329 | } |
---|
1330 | } |
---|
1331 | else |
---|
1332 | { |
---|
1333 | /* remove the directory */ |
---|
1334 | if (*end != '.') |
---|
1335 | return 1; |
---|
1336 | |
---|
1337 | if (tTd(56, 1)) |
---|
1338 | sm_dprintf("mci_purge_persistent: dpurge %s\n", pathname); |
---|
1339 | |
---|
1340 | ret = rmdir(pathname); |
---|
1341 | if (ret < 0) |
---|
1342 | { |
---|
1343 | if (tTd(56, 2)) |
---|
1344 | sm_dprintf("mci_purge_persistent: rmdir %s: %s\n", |
---|
1345 | pathname, sm_errstring(errno)); |
---|
1346 | return ret; |
---|
1347 | } |
---|
1348 | } |
---|
1349 | |
---|
1350 | return 0; |
---|
1351 | } |
---|
1352 | /* |
---|
1353 | ** MCI_GENERATE_PERSISTENT_PATH -- generate path from hostname |
---|
1354 | ** |
---|
1355 | ** Given `host', convert from a.b.c to $QueueDir/.hoststat/c./b./a, |
---|
1356 | ** putting the result into `path'. if `createflag' is set, intervening |
---|
1357 | ** directories will be created as needed. |
---|
1358 | ** |
---|
1359 | ** Parameters: |
---|
1360 | ** host -- host name to convert from. |
---|
1361 | ** path -- place to store result. |
---|
1362 | ** pathlen -- length of path buffer. |
---|
1363 | ** createflag -- if set, create intervening directories as |
---|
1364 | ** needed. |
---|
1365 | ** |
---|
1366 | ** Returns: |
---|
1367 | ** 0 -- success |
---|
1368 | ** -1 -- failure |
---|
1369 | */ |
---|
1370 | |
---|
1371 | static int |
---|
1372 | mci_generate_persistent_path(host, path, pathlen, createflag) |
---|
1373 | const char *host; |
---|
1374 | char *path; |
---|
1375 | int pathlen; |
---|
1376 | bool createflag; |
---|
1377 | { |
---|
1378 | char *elem, *p, *x, ch; |
---|
1379 | int ret = 0; |
---|
1380 | int len; |
---|
1381 | char t_host[MAXHOSTNAMELEN]; |
---|
1382 | #if NETINET6 |
---|
1383 | struct in6_addr in6_addr; |
---|
1384 | #endif /* NETINET6 */ |
---|
1385 | |
---|
1386 | /* |
---|
1387 | ** Rationality check the arguments. |
---|
1388 | */ |
---|
1389 | |
---|
1390 | if (host == NULL) |
---|
1391 | { |
---|
1392 | syserr("mci_generate_persistent_path: null host"); |
---|
1393 | return -1; |
---|
1394 | } |
---|
1395 | if (path == NULL) |
---|
1396 | { |
---|
1397 | syserr("mci_generate_persistent_path: null path"); |
---|
1398 | return -1; |
---|
1399 | } |
---|
1400 | |
---|
1401 | if (tTd(56, 80)) |
---|
1402 | sm_dprintf("mci_generate_persistent_path(%s): ", host); |
---|
1403 | |
---|
1404 | if (*host == '\0' || *host == '.') |
---|
1405 | return -1; |
---|
1406 | |
---|
1407 | /* make certain this is not a bracketed host number */ |
---|
1408 | if (strlen(host) > sizeof t_host - 1) |
---|
1409 | return -1; |
---|
1410 | if (host[0] == '[') |
---|
1411 | (void) sm_strlcpy(t_host, host + 1, sizeof t_host); |
---|
1412 | else |
---|
1413 | (void) sm_strlcpy(t_host, host, sizeof t_host); |
---|
1414 | |
---|
1415 | /* |
---|
1416 | ** Delete any trailing dots from the hostname. |
---|
1417 | ** Leave 'elem' pointing at the \0. |
---|
1418 | */ |
---|
1419 | |
---|
1420 | elem = t_host + strlen(t_host); |
---|
1421 | while (elem > t_host && |
---|
1422 | (elem[-1] == '.' || (host[0] == '[' && elem[-1] == ']'))) |
---|
1423 | *--elem = '\0'; |
---|
1424 | |
---|
1425 | /* check for bogus bracketed address */ |
---|
1426 | if (host[0] == '[') |
---|
1427 | { |
---|
1428 | bool good = false; |
---|
1429 | # if NETINET6 |
---|
1430 | if (anynet_pton(AF_INET6, t_host, &in6_addr) == 1) |
---|
1431 | good = true; |
---|
1432 | # endif /* NETINET6 */ |
---|
1433 | # if NETINET |
---|
1434 | if (inet_addr(t_host) != INADDR_NONE) |
---|
1435 | good = true; |
---|
1436 | # endif /* NETINET */ |
---|
1437 | if (!good) |
---|
1438 | return -1; |
---|
1439 | } |
---|
1440 | |
---|
1441 | /* check for what will be the final length of the path */ |
---|
1442 | len = strlen(HostStatDir) + 2; |
---|
1443 | for (p = (char *) t_host; *p != '\0'; p++) |
---|
1444 | { |
---|
1445 | if (*p == '.') |
---|
1446 | len++; |
---|
1447 | len++; |
---|
1448 | if (p[0] == '.' && p[1] == '.') |
---|
1449 | return -1; |
---|
1450 | } |
---|
1451 | if (len > pathlen || len < 1) |
---|
1452 | return -1; |
---|
1453 | (void) sm_strlcpy(path, HostStatDir, pathlen); |
---|
1454 | p = path + strlen(path); |
---|
1455 | while (elem > t_host) |
---|
1456 | { |
---|
1457 | if (!path_is_dir(path, createflag)) |
---|
1458 | { |
---|
1459 | ret = -1; |
---|
1460 | break; |
---|
1461 | } |
---|
1462 | elem--; |
---|
1463 | while (elem >= t_host && *elem != '.') |
---|
1464 | elem--; |
---|
1465 | *p++ = '/'; |
---|
1466 | x = elem + 1; |
---|
1467 | while ((ch = *x++) != '\0' && ch != '.') |
---|
1468 | { |
---|
1469 | if (isascii(ch) && isupper(ch)) |
---|
1470 | ch = tolower(ch); |
---|
1471 | if (ch == '/') |
---|
1472 | ch = ':'; /* / -> : */ |
---|
1473 | *p++ = ch; |
---|
1474 | } |
---|
1475 | if (elem >= t_host) |
---|
1476 | *p++ = '.'; |
---|
1477 | *p = '\0'; |
---|
1478 | } |
---|
1479 | if (tTd(56, 80)) |
---|
1480 | { |
---|
1481 | if (ret < 0) |
---|
1482 | sm_dprintf("FAILURE %d\n", ret); |
---|
1483 | else |
---|
1484 | sm_dprintf("SUCCESS %s\n", path); |
---|
1485 | } |
---|
1486 | return ret; |
---|
1487 | } |
---|