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annotate src/readsock.c @ 214:ecd8d737d78e

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removed the old manual because it is really outdated now In masqmail's 0.3 branch, so much changed that the old manual causes more harm than it improves the distribution. Most content is covered by the man pages anyway. You'll still find the old manual on masqmail's homepage.
author meillo@marmaro.de
date Mon, 19 Jul 2010 14:06:08 +0200
parents 3654c502a4df
children 41958685480d
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0
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1 /* MasqMail
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2 Copyright (C) 2000 Oliver Kurth
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3
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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4 This program is free software; you can redistribute it and/or modify
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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5 it under the terms of the GNU General Public License as published by
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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6 the Free Software Foundation; either version 2 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program; if not, write to the Free Software
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16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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17 */
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18
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19 #include <signal.h>
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20 #include <stdio.h>
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21 #include <stdlib.h>
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22 #include <setjmp.h>
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23 #include <unistd.h>
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24 #include <ctype.h>
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25
0
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26 #include "readsock.h"
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27 /*#include "masqmail.h"*/
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28
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29 jmp_buf jmp_timeout;
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30
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31 static void
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32 sig_timeout_handler(int sig)
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33 {
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34 longjmp(jmp_timeout, 1);
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35 }
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36
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37 static struct sigaction old_sa_alrm;
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38
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39 static void
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40 alarm_on(int timeout)
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41 {
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42 struct sigaction sa;
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43
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44 sa.sa_handler = sig_timeout_handler;
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45 sigemptyset(&(sa.sa_mask));
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46 sa.sa_flags = 0;
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47 sigaction(SIGALRM, &sa, &old_sa_alrm);
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48
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49 if (timeout > 0)
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50 alarm(timeout);
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51 }
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52
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53 static void
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54 alarm_off()
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55 {
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56 alarm(0);
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57
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58 sigaction(SIGALRM, &old_sa_alrm, NULL);
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59 }
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61 static void
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62 _read_chug(FILE * in)
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63 {
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64 int c = 0;
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65
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66 c = fgetc(in);
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67 while (isspace(c) && (c != EOF))
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68 c = fgetc(in);
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69 ungetc(c, in);
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70 }
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71
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72 static int
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73 _read_line(FILE * in, char *buf, int buf_len, int timeout)
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74 {
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75 int p = 0;
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76 int c = 0;
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77
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78 c = fgetc(in);
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79 while ((c != '\n') && (c != EOF) && (p < buf_len - 1)) {
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80 buf[p++] = c;
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81 c = fgetc(in);
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82 }
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83
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84 buf[p] = '\0';
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85
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86 if (c == EOF)
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87 return -1;
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88 else if (p >= buf_len) {
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89 ungetc(c, in);
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90 return -2;
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91 }
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92
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93 buf[p++] = c; /* \n */
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94 buf[p] = '\0';
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95
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96 return p;
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97 }
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98
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99 int
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100 read_sockline(FILE * in, char *buf, int buf_len, int timeout, unsigned int flags)
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101 {
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102 int p = 0;
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103
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104 if (setjmp(jmp_timeout) != 0) {
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105 alarm_off();
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106 return -3;
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107 }
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108
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109 alarm_on(timeout);
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110
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111 /* strip leading spaces */
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112 if (flags & READSOCKL_CHUG) {
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113 _read_chug(in);
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114 }
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115
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116 p = _read_line(in, buf, buf_len, timeout);
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117
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118 alarm_off();
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119
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120 if (p > 1) {
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121 /* here we are sure that buf[p-1] == '\n' */
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122 if (flags & READSOCKL_CVT_CRLF) {
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123 if ((buf[p - 2] == '\r') && (buf[p - 1] == '\n')) {
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124 buf[p - 2] = '\n';
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125 buf[p - 1] = 0;
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126 p--;
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127 }
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128 }
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129 }
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130 return p;
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131 }
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132
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133 int
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134 read_sockline1(FILE * in, char **pbuf, int *buf_len, int timeout, unsigned int flags)
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135 {
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136 int p = 0, size = *buf_len;
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137 char *buf;
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138
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139 if (setjmp(jmp_timeout) != 0) {
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140 alarm_off();
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141 return -3;
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142 }
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143
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144 alarm_on(timeout);
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145
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146 /* strip leading spaces */
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147 if (flags & READSOCKL_CHUG) {
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148 _read_chug(in);
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149 }
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150
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151 if (!*pbuf)
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152 *pbuf = g_malloc(size);
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153 buf = *pbuf;
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154
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155 while (1) {
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156 int pp;
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157
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158 pp = _read_line(in, buf, size, timeout);
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159 if (pp == -2) {
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160 *pbuf = realloc(*pbuf, *buf_len + size);
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161 buf = *pbuf + *buf_len;
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162 *buf_len += size;
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163 p += size;
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164 } else {
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165 if (pp > 0)
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166 p += pp;
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167 else
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168 p = pp;
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169 break;
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170 }
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171 }
0
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172
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173 alarm_off();
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174
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175 if (p > 1) {
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176 buf = *pbuf;
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177 /* here we are sure that buf[p-1] == '\n' */
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178 if (flags & READSOCKL_CVT_CRLF) {
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179 if ((buf[p - 2] == '\r') && (buf[p - 1] == '\n')) {
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180 buf[p - 2] = '\n';
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f671821d8222 code beautifying; 0 -> \0 if appropriate
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181 buf[p - 1] = '\0';
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182 p--;
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183 }
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184 }
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185 }
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186 return p;
0
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187 }