Mercurial > masqmail

annotate src/readsock.c @ 13:49dab67fe461

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code beautifying
author meillo@marmaro.de
date Wed, 29 Oct 2008 21:10:18 +0100
parents 26e34ae9a3e3
children f671821d8222
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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
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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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
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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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 "masqmail.h"*/
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20 #include <signal.h>
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21 #include <stdio.h>
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22 #include <stdlib.h>
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23 #include <setjmp.h>
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24 #include <unistd.h>
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25 #include <ctype.h>
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26 #include "readsock.h"
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27
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28 jmp_buf jmp_timeout;
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29
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30 static void
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31 sig_timeout_handler(int sig)
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32 {
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33 longjmp(jmp_timeout, 1);
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34 }
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35
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36 static struct sigaction old_sa_alrm;
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37
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38 static void
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39 alarm_on(int timeout)
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40 {
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41 struct sigaction sa;
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42
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43 sa.sa_handler = sig_timeout_handler;
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44 sigemptyset(&(sa.sa_mask));
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45 sa.sa_flags = 0;
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46 sigaction(SIGALRM, &sa, &old_sa_alrm);
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47
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48 if (timeout > 0)
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49 alarm(timeout);
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50 }
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51
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52 static void
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53 alarm_off()
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54 {
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55 alarm(0);
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56
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57 sigaction(SIGALRM, &old_sa_alrm, NULL);
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58 }
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59
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60 static void
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61 _read_chug(FILE * in)
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62 {
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63 int c = 0;
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64
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65 c = fgetc(in);
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66 while (isspace(c) && (c != EOF))
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67 c = fgetc(in);
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68 ungetc(c, in);
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69 }
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70
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71 static int
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72 _read_line(FILE * in, char *buf, int buf_len, int timeout)
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73 {
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74 int p = 0;
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75 int c = 0;
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76
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77 c = fgetc(in);
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78 while ((c != '\n') && (c != EOF) && (p < buf_len - 1)) {
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79 buf[p++] = c;
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80 c = fgetc(in);
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81 }
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82
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83 buf[p] = 0;
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84
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85 if (c == EOF)
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86 return -1;
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87 else if (p >= buf_len) {
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88 ungetc(c, in);
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89 return -2;
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90 }
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91
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92 buf[p++] = c; /* \n */
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93 buf[p] = 0;
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94
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95 return p;
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96 }
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97
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98 int
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99 read_sockline(FILE * in, char *buf, int buf_len, int timeout, unsigned int flags)
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100 {
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101 int p = 0;
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102
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103 if (setjmp(jmp_timeout) != 0) {
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104 alarm_off();
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105 return -3;
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106 }
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107
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108 alarm_on(timeout);
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109
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110 /* strip leading spaces */
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111 if (flags & READSOCKL_CHUG) {
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112 _read_chug(in);
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113 }
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114
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115 p = _read_line(in, buf, buf_len, timeout);
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116
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117 alarm_off();
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118
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119 if (p > 1) {
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120 /* here we are sure that buf[p-1] == '\n' */
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121 if (flags & READSOCKL_CVT_CRLF) {
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122 if ((buf[p - 2] == '\r') && (buf[p - 1] == '\n')) {
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123 buf[p - 2] = '\n';
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124 buf[p - 1] = 0;
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125 p--;
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126 }
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127 }
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128 }
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129 return p;
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130 }
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131
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132 int
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133 read_sockline1(FILE * in, char **pbuf, int *buf_len, int timeout, unsigned int flags)
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134 {
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135 int p = 0, size = *buf_len;
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136 char *buf;
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137
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138 if (setjmp(jmp_timeout) != 0) {
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139 alarm_off();
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140 return -3;
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141 }
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142
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143 alarm_on(timeout);
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144
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145 /* strip leading spaces */
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146 if (flags & READSOCKL_CHUG) {
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147 _read_chug(in);
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148 }
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149
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150 if (!*pbuf)
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151 *pbuf = malloc(size);
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152 buf = *pbuf;
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153
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154 while (1) {
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155 int pp;
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156
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157 pp = _read_line(in, buf, size, timeout);
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158 if (pp == -2) {
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159 *pbuf = realloc(*pbuf, *buf_len + size);
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160 buf = *pbuf + *buf_len;
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161 *buf_len += size;
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162 p += size;
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163 } else {
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164 if (pp > 0)
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165 p += pp;
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166 else
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167 p = pp;
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168 break;
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169 }
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170 }
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171
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172 alarm_off();
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173
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174 if (p > 1) {
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175 buf = *pbuf;
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176 /* here we are sure that buf[p-1] == '\n' */
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177 if (flags & READSOCKL_CVT_CRLF) {
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178 if ((buf[p - 2] == '\r') && (buf[p - 1] == '\n')) {
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179 buf[p - 2] = '\n';
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180 buf[p - 1] = 0;
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181 p--;
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182 }
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183 }
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184 }
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185 return p;
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186 }