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annotate src/readsock.c @ 410:cff967b2f51e

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Minor comment rework.
author markus schnalke <meillo@marmaro.de>
date Wed, 29 Feb 2012 12:05:47 +0100
parents 9bc3e47b0222
children
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367
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1 /*
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2 ** MasqMail
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3 ** Copyright (C) 2000 Oliver Kurth
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4 **
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5 ** This program is free software; you can redistribute it and/or modify
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6 ** it under the terms of the GNU General Public License as published by
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7 ** the Free Software Foundation; either version 2 of the License, or
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8 ** (at your option) any later version.
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9 **
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10 ** This program is distributed in the hope that it will be useful,
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11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 ** GNU General Public License for more details.
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14 **
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15 ** You should have received a copy of the GNU General Public License
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16 ** along with this program; if not, write to the Free Software
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17 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
0
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18 */
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19
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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
0
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27 #include "readsock.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);
0
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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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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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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,
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135 unsigned int flags)
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136 {
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137 int p = 0, size = *buf_len;
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138 char *buf;
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139
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140 if (setjmp(jmp_timeout) != 0) {
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141 alarm_off();
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142 return -3;
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143 }
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144
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145 alarm_on(timeout);
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146
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147 /* strip leading spaces */
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148 if (flags & READSOCKL_CHUG) {
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149 _read_chug(in);
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150 }
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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151
377
9bc3e47b0222 Various cleanups to remove compiler warnings.
markus schnalke <meillo@marmaro.de>
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152 if (!*pbuf) {
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153 *pbuf = (char *) malloc(size);
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154 if (!*pbuf) {
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markus schnalke <meillo@marmaro.de>
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155 fprintf(stderr, "Out of memory.\n");
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156 exit(1);
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parents: 368
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157 }
9bc3e47b0222 Various cleanups to remove compiler warnings.
markus schnalke <meillo@marmaro.de>
parents: 368
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158 }
10
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parents: 0
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159 buf = *pbuf;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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160
10
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161 while (1) {
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162 int pp;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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163
10
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164 pp = _read_line(in, buf, size, timeout);
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165 if (pp == -2) {
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166 *pbuf = realloc(*pbuf, *buf_len + size);
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167 buf = *pbuf + *buf_len;
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168 *buf_len += size;
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169 p += size;
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parents: 0
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170 } else {
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parents: 0
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171 if (pp > 0)
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172 p += pp;
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173 else
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174 p = pp;
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parents: 0
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175 break;
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parents: 0
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176 }
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177 }
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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178
10
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meillo@marmaro.de
parents: 0
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179 alarm_off();
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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180
10
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meillo@marmaro.de
parents: 0
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181 if (p > 1) {
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meillo@marmaro.de
parents: 0
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182 buf = *pbuf;
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183 /* here we are sure that buf[p-1] == '\n' */
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184 if (flags & READSOCKL_CVT_CRLF) {
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parents: 0
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185 if ((buf[p - 2] == '\r') && (buf[p - 1] == '\n')) {
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186 buf[p - 2] = '\n';
15
f671821d8222 code beautifying; 0 -> \0 if appropriate
meillo@marmaro.de
parents: 10
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187 buf[p - 1] = '\0';
10
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188 p--;
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189 }
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190 }
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191 }
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192 return p;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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193 }