src/server/util/io.c

Sun, 23 Jun 2013 13:51:49 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 23 Jun 2013 13:51:49 +0200
changeset 75
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parent 71
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child 80
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merge

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2013 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #ifdef __gnu_linux__
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30 #define _GNU_SOURCE
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31 #endif
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32
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33 #include <unistd.h>
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34 #include <stdlib.h>
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35 #include <sys/uio.h>
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36 #include <sys/uio.h>
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37 #ifndef BSD
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38 #include <sys/sendfile.h>
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39 #endif
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40 #include <limits.h> /* asprintf */
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41
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42 #include "../daemon/vfs.h"
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43 #include "io.h"
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44 #include "pool.h"
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45
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46 IOStream native_io_funcs = {
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47 system_write,
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48 system_writev,
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49 system_read,
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50 NULL
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51 };
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52
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53 IOStream net_io_funcs = {
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54 (io_write_f)net_stream_write,
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55 (io_writev_f)net_stream_writev,
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56 (io_read_f)net_stream_read,
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57 (io_sendfile_f)net_stream_sendfile
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58 };
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59
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60
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61 IOStream* stream_new_from_fd(pool_handle_t *pool, int fd) {
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62 SystemIOStream *st = pool_malloc(pool, sizeof(SystemIOStream));
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63 st->st = native_io_funcs;
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64 st->fd = fd;
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65 return (IOStream*)st;
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66 }
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67
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68 ssize_t system_write(IOStream *st, void *buf, size_t nbytes) {
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69 return write(((SystemIOStream*)st)->fd, buf, nbytes);
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70 }
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72 ssize_t system_writev(IOStream *st, struct iovec *iovec, int iovcnt) {
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73 return writev(((SystemIOStream*)st)->fd, iovec, iovcnt);
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74 }
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75
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76 ssize_t system_read(IOStream *st, void *buf, size_t nbytes) {
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77 return read(((SystemIOStream*)st)->fd, buf, nbytes);
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78 }
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80
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81 IOStream* net_stream_from_fd(pool_handle_t *pool, int fd) {
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82 NetIOStream *st = pool_malloc(pool, sizeof(NetIOStream));
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83 st->st = net_io_funcs;
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84 st->fd = fd;
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85 st->max_read = 0;
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86 st->read = 0;
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87 st->chunked_enc = 0;
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88 st->buffered = 0;
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89 return (IOStream*)st;
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90 }
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91
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92 ssize_t net_stream_write(NetIOStream *st, void *buf, size_t nbytes) {
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93 if(st->chunked_enc) {
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94 // TODO: on some plattforms iov_len is smaller than size_t
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95 struct iovec io[2];
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96 char chunk_len[16];
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97 io[0].iov_base = chunk_len;
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98 io[0].iov_len = snprintf(chunk_len, 16, "\r\n%zx\r\n", nbytes);
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99 io[1].iov_base = buf;
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100 io[1].iov_len = nbytes;
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101 ssize_t r = writev(st->fd, io, 2);
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102 return r - io[0].iov_len;
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103 } else {
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104 return write(st->fd, buf, nbytes);
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105 }
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106 }
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107
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108 ssize_t net_stream_writev(NetIOStream *st, struct iovec *iovec, int iovcnt) {
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109 if(st->chunked_enc) {
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110 struct iovec *io = calloc(iovcnt + 1, sizeof(struct iovec));
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111 char chunk_len[16];
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112 io[0].iov_base = chunk_len;
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113 size_t len = 0;
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114 for(int i=0;i<iovcnt;i++) {
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115 len += iovec[i].iov_len;
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116 }
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117 io[0].iov_len = snprintf(chunk_len, 16, "\r\n%zx\r\n", len);
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118 memcpy(io + 1, iovec, iovcnt * sizeof(struct iovec));
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119 ssize_t r = writev(st->fd, io, iovcnt + 1);
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120 return r - io[0].iov_len;
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121 } else {
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122 return writev(st->fd, iovec, iovcnt);
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123 }
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124 }
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125
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126 ssize_t net_stream_read(NetIOStream *st, void *buf, size_t nbytes) {
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127 if(st->max_read != 0 && st->read >= st->max_read) {
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128 return 0;
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129 }
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130 ssize_t r = read(st->fd, buf, nbytes);
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131 st->read += r;
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132 return r;
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133 }
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134
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135 ssize_t net_stream_sendfile(NetIOStream *st, sendfiledata *sfd) {
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136 // TODO: header and trailer
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137 ssize_t ret = 0;
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138 off_t fileoffset = sfd->offset;
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139 if(sfd->fd->fd != -1) {
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140 #ifdef BSD
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141 struct iovec hdvec;
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142 hdvec.iov_base = (void*)sfd->header;
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143 hdvec.iov_len = sfd->hlen;
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144 struct iovec trvec;
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145 trvec.iov_base = (void*)sfd->trailer;
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146 trvec.iov_len = sfd->tlen;
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147 struct sf_hdtr hdtr;
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148 hdtr.headers = &hdvec;
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diff changeset
149 hdtr.hdr_cnt = 1;
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150 hdtr.trailers = &trvec;
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diff changeset
151 hdtr.trl_cnt = 1;
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diff changeset
152
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153 off_t len = sfd->len;
71
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diff changeset
154 #ifdef OSX
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155 ret = sendfile(sfd->fd->fd, st->fd, fileoffset, &len, &hdtr, 0);
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diff changeset
156 #else // BSD
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157 ret = sendfile(
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158 sfd->fd->fd,
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159 st->fd,
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160 fileoffset,
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161 sfd->len,
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162 &hdtr,
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diff changeset
163 NULL,
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diff changeset
164 0);
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diff changeset
165 #endif
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diff changeset
166 #else // Solaris/Linux
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diff changeset
167 ret = sendfile(st->fd, sfd->fd->fd, &fileoffset, sfd->len);
69
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diff changeset
168 #endif
54
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169 } else {
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diff changeset
170 // TODO: regular copy
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diff changeset
171 fprintf(stderr, "sendfile not implemented for SYS_FILE\n");
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172 }
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173
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diff changeset
174 return ret;
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175 }
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176
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177
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diff changeset
178 ssize_t net_read(SYS_NETFD fd, void *buf, size_t nbytes) {
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179 ssize_t r = ((IOStream*)fd)->read(fd, buf, nbytes);
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180 if(r == 0) {
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181 return IO_EOF;
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182 }
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183 return r;
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184 }
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185
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186 ssize_t net_write(SYS_NETFD fd, void *buf, size_t nbytes) {
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187 ssize_t r = ((IOStream*)fd)->write(fd, buf, nbytes);
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188 if(r < 0) {
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189 return IO_ERROR;
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190 }
9
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diff changeset
191 return r;
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diff changeset
192 }
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diff changeset
193
64
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diff changeset
194 ssize_t net_writev(SYS_NETFD fd, struct iovec *iovec, int iovcnt) {
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195 ssize_t r = ((IOStream*)fd)->writev(fd, iovec, iovcnt);
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196 if(r < 0) {
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197 return IO_ERROR;
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198 }
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diff changeset
199 return r;
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diff changeset
200 }
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diff changeset
201
23
a2c8fc23c90e Added basic authentication
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diff changeset
202 ssize_t net_printf(SYS_NETFD fd, char *format, ...) {
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203 va_list arg;
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204 va_start(arg, format);
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205 char *buf;
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206 ssize_t len = vasprintf(&buf, format, arg);
64
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diff changeset
207 ssize_t r = net_write(fd, buf, len);
23
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208 free(buf);
64
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diff changeset
209 return r;
23
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210 }
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diff changeset
211
54
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diff changeset
212 ssize_t net_sendfile(SYS_NETFD fd, sendfiledata *sfd) {
66
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213 NetIOStream *out = fd;
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214 if(out->st.sendfile && sfd->fd && sfd->fd->fd != -1) {
54
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215 ssize_t r = ((IOStream*)fd)->sendfile(fd, sfd);
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216 if(r < 0) {
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217 return IO_ERROR;
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218 }
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diff changeset
219 } else {
66
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diff changeset
220 // stream/file does not support sendfile
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221 // do regular copy
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diff changeset
222 char *buf = malloc(4096);
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223 if(!buf) {
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diff changeset
224 // TODO: out of memory error
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225 return IO_ERROR;
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diff changeset
226 }
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diff changeset
227 char *header = (char*)sfd->header;
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diff changeset
228 int hlen = sfd->hlen;
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diff changeset
229 char *trailer = (char*)sfd->trailer;
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diff changeset
230 int tlen = sfd->tlen;
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diff changeset
231 if(header == NULL) {
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diff changeset
232 hlen = 0;
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diff changeset
233 }
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diff changeset
234 if(trailer == NULL) {
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diff changeset
235 tlen = 0;
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diff changeset
236 }
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diff changeset
237
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diff changeset
238 ssize_t r;
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diff changeset
239 while(hlen > 0) {
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diff changeset
240 r = out->st.write(fd, header, hlen);
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diff changeset
241 header += r;
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diff changeset
242 hlen -= r;
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diff changeset
243 if(r <= 0) {
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diff changeset
244 free(buf);
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diff changeset
245 return IO_ERROR;
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parents: 65
diff changeset
246 }
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diff changeset
247 }
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diff changeset
248
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diff changeset
249 if(system_lseek(sfd->fd, sfd->offset, SEEK_SET) == -1) {
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diff changeset
250 free(buf);
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diff changeset
251 return IO_ERROR;
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parents: 65
diff changeset
252 }
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diff changeset
253
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diff changeset
254 size_t length = sfd->len;
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diff changeset
255 while(length > 0) {
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parents: 65
diff changeset
256 if((r = system_fread(sfd->fd, buf, 4096)) <= 0) {
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diff changeset
257 break;
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diff changeset
258 }
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diff changeset
259 char *write_buf = buf;
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diff changeset
260 while(r > 0) {
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parents: 65
diff changeset
261 ssize_t w = out->st.write(fd, write_buf, r);
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diff changeset
262 r -= w;
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parents: 65
diff changeset
263 length -= w;
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parents: 65
diff changeset
264 write_buf += w;
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parents: 65
diff changeset
265 }
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parents: 65
diff changeset
266 }
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parents: 65
diff changeset
267 free(buf);
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parents: 65
diff changeset
268 if(length > 0) {
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parents: 65
diff changeset
269 return IO_ERROR;
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parents: 65
diff changeset
270 }
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parents: 65
diff changeset
271
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parents: 65
diff changeset
272 while(tlen > 0) {
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parents: 65
diff changeset
273 r = out->st.write(fd, trailer, tlen);
74babc0082b7 added authentication cache
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parents: 65
diff changeset
274 trailer += r;
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parents: 65
diff changeset
275 tlen -= r;
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parents: 65
diff changeset
276 if(r <= 0) {
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diff changeset
277 return IO_ERROR;
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parents: 65
diff changeset
278 }
74babc0082b7 added authentication cache
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parents: 65
diff changeset
279 }
74babc0082b7 added authentication cache
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parents: 65
diff changeset
280
74babc0082b7 added authentication cache
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parents: 65
diff changeset
281 return sfd->hlen + sfd->len + sfd->tlen;
54
3a1d5a52adfc new vfs api
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parents: 46
diff changeset
282 }
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parents: 46
diff changeset
283 return IO_ERROR;
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parents: 46
diff changeset
284 }
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parents: 46
diff changeset
285
8
f4d56bf9de40 Added request body reader
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parents: 4
diff changeset
286
4
998844b5ed25 Added some protocol functions
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parents: 1
diff changeset
287 /* iovec buffer */
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parents: 1
diff changeset
288 iovec_buf_t *iovec_buf_create(pool_handle_t *pool) {
998844b5ed25 Added some protocol functions
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parents: 1
diff changeset
289 iovec_buf_t *buf = pool_malloc(pool, sizeof(iovec_buf_t));
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parents: 1
diff changeset
290
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parents: 1
diff changeset
291 buf->pool = pool;
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parents: 1
diff changeset
292 buf->iov = pool_calloc(pool, 32, sizeof(struct iovec));
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parents: 1
diff changeset
293 buf->maxiovec = 32;
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parents: 1
diff changeset
294 buf->iovctn = 0;
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parents: 1
diff changeset
295
998844b5ed25 Added some protocol functions
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parents: 1
diff changeset
296 return buf;
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parents: 1
diff changeset
297 }
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parents: 1
diff changeset
298
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parents: 1
diff changeset
299 void iovec_buf_write(iovec_buf_t *io, void *buf, size_t nbyte) {
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parents: 1
diff changeset
300 if(io->iovctn >= io->maxiovec) {
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parents: 1
diff changeset
301 io->iov = pool_realloc(
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parents: 1
diff changeset
302 io->pool,
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parents: 1
diff changeset
303 io->iov,
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parents: 1
diff changeset
304 (io->maxiovec + 16) * sizeof(struct iovec));
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parents: 1
diff changeset
305 }
998844b5ed25 Added some protocol functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 1
diff changeset
306
998844b5ed25 Added some protocol functions
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307 io->iov[io->iovctn].iov_base = buf;
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308 io->iov[io->iovctn].iov_len = nbyte;
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309 io->iovctn++;
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310 }
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311
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312 ssize_t iovec_buf_flush(iovec_buf_t *io, int fd) {
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313 return writev(fd, io->iov, io->iovctn);
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314 }
32
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315
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316
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317 /* TODO: add asprintf to new file */
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318
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319 /*
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320 * asprintf implementation for Solaris 10
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321 * source from OpenSolaris
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322 * file: /onnv/onnv-gate/usr/src/lib/libc/port/print/asprintf.c
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323 */
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324
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325 /*
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326 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
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327 * Use is subject to license terms.
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328 */
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329
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330 /*
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331 * Copyright (c) 2004 Darren Tucker.
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332 *
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333 * Based originally on asprintf.c from OpenBSD:
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334 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
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335 *
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336 * Permission to use, copy, modify, and distribute this software for any
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337 * purpose with or without fee is hereby granted, provided that the above
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338 * copyright notice and this permission notice appear in all copies.
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339 *
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340 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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341 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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342 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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343 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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344 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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345 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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346 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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347 */
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348
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349 #ifdef __SunOS_5_10
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350
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351 #define INIT_SZ 128
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352
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353 /* VARARGS2 */
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354 int
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355 vasprintf(char **str, const char *format, va_list ap)
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356 {
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357 char string[INIT_SZ];
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358 char *newstr;
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359 int ret;
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360 size_t len;
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361
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362 *str = NULL;
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363 ret = vsnprintf(string, INIT_SZ, format, ap);
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364 if (ret < 0) /* retain the value of errno from vsnprintf() */
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365 return (-1);
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366 if (ret < INIT_SZ) {
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367 len = ret + 1;
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368 if ((newstr = malloc(len)) == NULL)
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369 return (-1); /* retain errno from malloc() */
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370 (void) strlcpy(newstr, string, len);
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371 *str = newstr;
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372 return (ret);
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373 }
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374 /*
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375 * We will perform this loop more than once only if some other
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376 * thread modifies one of the vasprintf() arguments after our
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377 * previous call to vsnprintf().
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378 */
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379 for (;;) {
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380 if (ret == INT_MAX) { /* Bad length */
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381 errno = ENOMEM;
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382 return (-1);
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383 }
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384 len = ret + 1;
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385 if ((newstr = malloc(len)) == NULL)
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386 return (-1); /* retain errno from malloc() */
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387 ret = vsnprintf(newstr, len, format, ap);
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388 if (ret < 0) { /* retain errno from vsnprintf() */
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389 free(newstr);
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390 return (-1);
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391 }
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392 if (ret < len) {
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393 *str = newstr;
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394 return (ret);
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395 }
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396 free(newstr);
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397 }
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398 }
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399
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400 int
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401 asprintf(char **str, const char *format, ...)
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402 {
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403 va_list ap;
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404 int ret;
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405
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406 *str = NULL;
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407 va_start(ap, format);
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408 ret = vasprintf(str, format, ap);
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409 va_end(ap);
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410
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411 return (ret);
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412 }
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413
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414 #endif

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