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annotate src/readsock.c @ 371:f122535c589e

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Refactoring: early failure exit.
author markus schnalke <meillo@marmaro.de>
date Tue, 25 Oct 2011 13:51:43 +0200
parents b35c17fcf69d
children 9bc3e47b0222
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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 /*#include "masqmail.h"*/
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29
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30 jmp_buf jmp_timeout;
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31
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32 static void
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33 sig_timeout_handler(int sig)
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34 {
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35 longjmp(jmp_timeout, 1);
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36 }
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37
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38 static struct sigaction old_sa_alrm;
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39
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40 static void
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41 alarm_on(int timeout)
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42 {
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43 struct sigaction sa;
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44
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45 sa.sa_handler = sig_timeout_handler;
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46 sigemptyset(&(sa.sa_mask));
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47 sa.sa_flags = 0;
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48 sigaction(SIGALRM, &sa, &old_sa_alrm);
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49
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50 if (timeout > 0)
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51 alarm(timeout);
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52 }
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53
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54 static void
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55 alarm_off()
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56 {
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57 alarm(0);
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58
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59 sigaction(SIGALRM, &old_sa_alrm, NULL);
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60 }
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61
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62 static void
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63 _read_chug(FILE *in)
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64 {
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65 int c = 0;
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66
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67 c = fgetc(in);
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68 while (isspace(c) && (c != EOF))
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69 c = fgetc(in);
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70 ungetc(c, in);
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71 }
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73 static int
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74 _read_line(FILE *in, char *buf, int buf_len, int timeout)
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75 {
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76 int p = 0;
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77 int c = 0;
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78
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79 c = fgetc(in);
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80 while ((c != '\n') && (c != EOF) && (p < buf_len - 1)) {
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81 buf[p++] = c;
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82 c = fgetc(in);
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83 }
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84
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85 buf[p] = '\0';
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86
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87 if (c == EOF)
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88 return -1;
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89 else if (p >= buf_len) {
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90 ungetc(c, in);
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91 return -2;
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92 }
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93
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94 buf[p++] = c; /* \n */
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95 buf[p] = '\0';
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96
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97 return p;
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98 }
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99
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100 int
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101 read_sockline(FILE *in, char *buf, int buf_len, int timeout, unsigned int flags)
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102 {
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103 int p = 0;
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104
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105 if (setjmp(jmp_timeout) != 0) {
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106 alarm_off();
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107 return -3;
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108 }
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109
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110 alarm_on(timeout);
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111
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112 /* strip leading spaces */
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113 if (flags & READSOCKL_CHUG) {
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114 _read_chug(in);
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115 }
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116
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117 p = _read_line(in, buf, buf_len, timeout);
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118
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119 alarm_off();
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120
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121 if (p > 1) {
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122 /* here we are sure that buf[p-1] == '\n' */
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123 if (flags & READSOCKL_CVT_CRLF) {
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124 if ((buf[p - 2] == '\r') && (buf[p - 1] == '\n')) {
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125 buf[p - 2] = '\n';
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126 buf[p - 1] = 0;
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127 p--;
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128 }
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129 }
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130 }
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131 return p;
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132 }
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133
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134 int
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135 read_sockline1(FILE *in, char **pbuf, int *buf_len, int timeout,
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136 unsigned int flags)
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137 {
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138 int p = 0, size = *buf_len;
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139 char *buf;
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140
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141 if (setjmp(jmp_timeout) != 0) {
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142 alarm_off();
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143 return -3;
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144 }
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145
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146 alarm_on(timeout);
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147
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148 /* strip leading spaces */
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149 if (flags & READSOCKL_CHUG) {
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meillo@marmaro.de
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150 _read_chug(in);
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151 }
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
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152
10
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meillo@marmaro.de
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153 if (!*pbuf)
368
b35c17fcf69d Added cast to avoid compiler warning.
markus schnalke <meillo@marmaro.de>
parents: 367
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154 *pbuf = (char *) g_malloc(size);
10
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155 buf = *pbuf;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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156
10
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157 while (1) {
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158 int pp;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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159
10
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meillo@marmaro.de
parents: 0
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160 pp = _read_line(in, buf, size, timeout);
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meillo@marmaro.de
parents: 0
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161 if (pp == -2) {
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meillo@marmaro.de
parents: 0
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162 *pbuf = realloc(*pbuf, *buf_len + size);
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meillo@marmaro.de
parents: 0
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163 buf = *pbuf + *buf_len;
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164 *buf_len += size;
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165 p += size;
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meillo@marmaro.de
parents: 0
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166 } else {
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meillo@marmaro.de
parents: 0
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167 if (pp > 0)
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meillo@marmaro.de
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168 p += pp;
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meillo@marmaro.de
parents: 0
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169 else
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meillo@marmaro.de
parents: 0
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170 p = pp;
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meillo@marmaro.de
parents: 0
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171 break;
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meillo@marmaro.de
parents: 0
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172 }
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meillo@marmaro.de
parents: 0
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173 }
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
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174
10
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meillo@marmaro.de
parents: 0
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175 alarm_off();
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
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176
10
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meillo@marmaro.de
parents: 0
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177 if (p > 1) {
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meillo@marmaro.de
parents: 0
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178 buf = *pbuf;
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meillo@marmaro.de
parents: 0
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179 /* here we are sure that buf[p-1] == '\n' */
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meillo@marmaro.de
parents: 0
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180 if (flags & READSOCKL_CVT_CRLF) {
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meillo@marmaro.de
parents: 0
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181 if ((buf[p - 2] == '\r') && (buf[p - 1] == '\n')) {
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meillo@marmaro.de
parents: 0
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182 buf[p - 2] = '\n';
15
f671821d8222 code beautifying; 0 -> \0 if appropriate
meillo@marmaro.de
parents: 10
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183 buf[p - 1] = '\0';
10
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meillo@marmaro.de
parents: 0
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184 p--;
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parents: 0
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185 }
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186 }
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187 }
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parents: 0
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188 return p;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
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189 }