src/server/plugins/postgresql/vfs.c

Sat, 14 May 2022 15:21:59 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sat, 14 May 2022 15:21:59 +0200
branch
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changeset 359
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parent 353
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child 366
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permissions
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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 2022 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 #include "vfs.h"
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30
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31 #include <inttypes.h>
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32
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33 #include "../../util/util.h"
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34
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35 static VFS pg_vfs_class = {
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36 pg_vfs_open,
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37 pg_vfs_stat,
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38 pg_vfs_fstat,
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39 pg_vfs_opendir,
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40 pg_vfs_fdopendir,
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41 pg_vfs_mkdir,
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42 pg_vfs_unlink,
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43 pg_vfs_rmdir
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44 };
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45
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46 static VFS_IO pg_vfs_io_class = {
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47 pg_vfs_io_read,
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48 pg_vfs_io_write,
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49 pg_vfs_io_pread,
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50 pg_vfs_io_pwrite,
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51 pg_vfs_io_seek,
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52 pg_vfs_io_close,
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53 NULL, // no pg aio implementation yet
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54 NULL,
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55 pg_vfs_io_getetag
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56 };
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57
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58 static VFS_DIRIO pg_vfs_dirio_class = {
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59 pg_vfs_dirio_readdir,
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60 pg_vfs_dirio_close
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61 };
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62
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63
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64 /*
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65 * SQL Queries
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66 */
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67
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68 // Resolves a path into resource_id and parent_id
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69 // params: $1: path string
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70 static const char *sql_resolve_path =
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71 "with recursive resolvepath as (\n\
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72 select\n\
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73 resource_id,\n\
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74 parent_id,\n\
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75 '' as fullpath,\n\
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76 resoid,\n\
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77 iscollection,\n\
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78 lastmodified,\n\
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79 creationdate,\n\
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80 contentlength,\n\
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81 etag,\n\
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82 regexp_split_to_array($1, '/') as pathelm,\n\
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83 1 as pathdepth\n\
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84 from Resource\n\
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85 where parent_id is null\n\
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86 union\n\
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87 select\n\
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88 r.resource_id,\n\
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89 r.parent_id,\n\
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90 p.fullpath || '/' || r.nodename,\n\
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91 r.resoid,\n\
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92 r.iscollection,\n\
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93 r.lastmodified,\n\
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94 r.creationdate,\n\
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95 r.contentlength,\n\
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96 r.etag,\n\
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97 p.pathelm,\n\
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98 p.pathdepth + 1\n\
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99 from Resource r\n\
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100 inner join resolvepath p on r.parent_id = p.resource_id\n\
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101 where p.pathelm[p.pathdepth+1] = r.nodename\n\
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102 )\n\
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103 select resource_id, parent_id, fullpath, resoid, iscollection, lastmodified, creationdate, contentlength, etag from resolvepath\n\
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104 where fullpath = $1 ;";
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105
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106 // Same as sql_resolve_path, but it returns the root collection
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107 // params: $1: path string (should be '/')
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108 static const char *sql_get_root = "select resource_id, parent_id, $1 as fullpath, resoid, true as iscollection, lastmodified, creationdate, contentlength, etag from Resource where parent_id is null;";
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109
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110 // Get all children of a specific collection
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111 // params: $1: parent resource_id
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112 static const char *sql_get_children = "select resource_id, nodename, iscollection, lastmodified, creationdate, contentlength, etag from Resource where parent_id = $1;";
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113
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114 // Get resource
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115 // params: $1: resource_id
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116 static const char *sql_get_resource = "select resource_id, nodename, iscollection, lastmodified, creationdate, contentlength, etag from Resource where resource_id = $1;";
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117
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118 // Create resource
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119 // params: $1: parent_id
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120 // $2: node name
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121 static const char *sql_create_resource =
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122 "insert into Resource (parent_id, nodename, iscollection, lastmodified, creationdate, contentlength, resoid) values\n\
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123 ($1, $2, false, now(), now(), 0, lo_creat(-1))\n\
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124 returning resource_id, resoid, lastmodified, creationdate;";
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125
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126 // Create collection
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127 // params: $1: parent_id
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128 // $2: node name
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129 static const char *sql_create_collection =
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130 "insert into Resource (parent_id, nodename, iscollection, lastmodified, creationdate, contentlength) values\n\
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131 ($1, $2, true, now(), now(), 0)\n\
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132 returning resource_id, lastmodified, creationdate;";
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133
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134 // Update resource metadata
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135 // params: $1: resource_id
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136 // $2: contentlength
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137 static const char *sql_update_resource = "update Resource set contentlength = $2, lastmodified = now(), etag = gen_random_uuid() where resource_id = $1;";
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138
294
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139 // Delete a resource
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140 // params: $1: resource_id
296
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141 static const char *sql_delete_res = "delete from Resource where parent_id is not null and resource_id = $1;";
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142
276
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143 VFS* pg_vfs_create(Session *sn, Request *rq, pblock *pb) {
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144 // resourcepool is required
278
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145 char *resource_pool = pblock_findval("resourcepool", pb);
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146 if(!resource_pool) {
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147 log_ereport(LOG_MISCONFIG, "pg_vfs_create: missing resourcepool parameter");
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148 return NULL;
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149 }
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150
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151 // get the resource first (most likely to fail due to misconfig)
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152 ResourceData *resdata = resourcepool_lookup(sn, rq, resource_pool, 0);
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153 if(!resdata) {
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154 log_ereport(LOG_MISCONFIG, "postgresql vfs: resource pool %s not found", resource_pool);
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155 return NULL;
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156 }
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157 // resdata will be freed automatically when the request is finished
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158
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159 return pg_vfs_create_from_resourcedata(sn, rq, resdata);
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160 }
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161
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162 VFS* pg_vfs_create_from_resourcedata(Session *sn, Request *rq, ResourceData *resdata) {
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163 // Create a new VFS object and a separate instance object
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164 // VFS contains fptrs that can be copied from pg_vfs_class
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165 // instance contains request specific data (PGconn)
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166 VFS *vfs = pool_malloc(sn->pool, sizeof(VFS));
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167 if(!vfs) {
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168 return NULL;
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169 }
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170
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171 PgVFS *vfs_priv = pool_malloc(sn->pool, sizeof(PgVFS));
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172 if(!vfs_priv) {
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173 pool_free(sn->pool, vfs);
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174 return NULL;
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175 }
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176 vfs_priv->connection = resdata->data;
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177 vfs_priv->pg_resource = resdata;
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178
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179 memcpy(vfs, &pg_vfs_class, sizeof(VFS));
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180 vfs->flags = 0;
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181 vfs->instance = vfs_priv;
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182
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183 return vfs;
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184 }
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185
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186
281
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187 int pg_resolve_path(
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188 PGconn *connection,
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189 const char *path,
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190 int64_t *parent_id,
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191 int64_t *resource_id,
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192 Oid *oid,
281
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193 const char **resource_name,
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194 WSBool *iscollection,
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195 struct stat *s,
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196 char *etag,
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197 int *res_errno)
281
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198 {
278
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199 // basic path validation
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200 if(!path) return 1;
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201 size_t pathlen = strlen(path);
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202 if(pathlen == 0) return 1;
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203 if(path[0] != '/') {
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204 return 1;
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205 }
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206
281
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207 char *pathf = NULL;
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208 if(pathlen > 1 && path[pathlen-1] == '/') {
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209 pathf = malloc(pathlen);
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210 memcpy(pathf, path, pathlen);
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211 pathf[pathlen-1] = 0; // remove trailing '/'
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212 path = pathf;
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213 }
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214
278
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215 // get last node of path
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216 *resource_name = util_resource_name(path);
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217
281
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218 const char *sql = pathlen == 1 ? sql_get_root : sql_resolve_path;
278
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219 PGresult *result = PQexecParams(
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220 connection,
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221 sql,
278
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222 1, // number of parameters
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223 NULL,
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224 &path, // parameter value
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225 NULL,
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226 NULL,
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227 0); // 0: result in text format
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228
281
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229 if(pathf) {
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230 free(pathf);
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231 }
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232
278
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233 if(!result) return 1;
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234
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235 int ret = 1;
281
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236 //int nfields = PQnfields(result);
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237 int nrows = PQntuples(result);
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238 if(nrows == 1) {
278
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239 char *resource_id_str = PQgetvalue(result, 0, 0);
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240 char *parent_id_str = PQgetvalue(result, 0, 1);
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241 char *iscol = PQgetvalue(result, 0, 4);
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242 char *lastmodified = PQgetvalue(result, 0, 5);
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243 char *creationdate = PQgetvalue(result, 0, 6);
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244 char *contentlength = PQgetvalue(result, 0, 7);
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245 char *res_etag = PQgetvalue(result, 0, 8);
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246 if(resource_id_str && parent_id_str) {
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247 if(util_strtoint(resource_id_str, resource_id)) {
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248 ret = 0; // success
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249 }
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250 // optionally get parent_id
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251 util_strtoint(parent_id_str, parent_id);
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252 }
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253
283
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254 if(oid) {
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255 char *resoid = PQgetvalue(result, 0, 3);
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256 int64_t roid;
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257 if(resoid && util_strtoint(resoid, &roid)) {
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258 *oid = roid;
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259 }
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260 }
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261
281
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262 if(iscollection && iscol) {
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263 *iscollection = iscol[0] == 't' ? TRUE : FALSE;
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264 }
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265
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266 if(s) {
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267 pg_set_stat(s, iscol, lastmodified, creationdate, contentlength);
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268 }
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269
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270 if(etag) {
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271 size_t etag_len = strlen(res_etag);
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272 if(etag_len < PG_ETAG_MAXLEN)
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273 memcpy(etag, res_etag, etag_len+1);
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274 }
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275 } else if(res_errno) {
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276 *res_errno = ENOENT;
278
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277 }
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278
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279 PQclear(result);
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280
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281 return ret;
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282 }
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283
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284
282
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285 void pg_set_stat(
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286 struct stat *s,
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287 const char *iscollection,
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288 const char *lastmodified,
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289 const char *creationdate,
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290 const char *contentlength)
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291 {
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292 memset(s, 0, sizeof(struct stat));
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293 if(iscollection) {
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294 WSBool iscol = iscollection[0] == 't' ? TRUE : FALSE;
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295 if(iscol) {
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296 s->st_mode |= 0x4000;
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297 }
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298 }
304
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299 s->st_mtime = pg_convert_timestamp(lastmodified);
283
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300
282
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301 if(contentlength) {
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302 int64_t len;
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303 if(util_strtoint(contentlength, &len)) {
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304 s->st_size = len;
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305 }
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306 }
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307 }
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308
290
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309 static int pg_create_res(
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310 PgVFS *pg,
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311 const char *resparentid_str,
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312 const char *nodename,
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313 int64_t *new_resource_id,
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314 Oid *oid,
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315 const char **resource_name,
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316 struct stat *s)
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317 {
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318 const char* params[2] = { resparentid_str, nodename };
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319 PGresult *result = PQexecParams(
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320 pg->connection,
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321 sql_create_resource,
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322 2, // number of parameters
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323 NULL,
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324 params, // parameter value
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325 NULL,
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326 NULL,
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327 0); // 0: result in text format
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328
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329 if(!result) return 1;
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330
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331 int ret = 1;
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332 if(PQntuples(result) == 1) {
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333 // sql insert succesful
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334 ret = 0;
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335
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336 char *id_str = PQgetvalue(result, 0, 0);
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337 char *oid_str = PQgetvalue(result, 0, 1);
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338 char *lastmodified = PQgetvalue(result, 0, 2);
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339 char *creationdate = PQgetvalue(result, 0, 3);
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340
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341 if(new_resource_id) {
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342 if(!id_str || !util_strtoint(id_str, new_resource_id)) {
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343 ret = 1; // shouldn't happen
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344 log_ereport(LOG_FAILURE, "Postgresql VFS: sql_create_resource: Could not convert resource_id to int");
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345 }
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346 }
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347 if(oid) {
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348 int64_t i;
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349 if(!oid_str || !util_strtoint(oid_str, &i)) {
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350 ret = 1; // shouldn't happen
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351 log_ereport(LOG_FAILURE, "Postgresql VFS: sql_create_resource: Could not convert oid to int");
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352 } else {
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353 *oid = i;
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354 }
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355 }
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356 if(resource_name) {
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357 *resource_name = nodename;
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358 }
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359 if(s) {
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360 pg_set_stat(s, 0, lastmodified, creationdate, NULL);
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361 }
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362 }
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363
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364 PQclear(result);
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365
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366 return ret;
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367 }
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368
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369
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370 static int pg_create_col(
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371 PgVFS *pg,
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372 const char *resparentid_str,
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373 const char *nodename,
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374 int64_t *new_resource_id,
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375 const char **resource_name,
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376 struct stat *s)
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377 {
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378 const char* params[2] = { resparentid_str, nodename };
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379 PGresult *result = PQexecParams(
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380 pg->connection,
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381 sql_create_collection,
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382 2, // number of parameters
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383 NULL,
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diff changeset
384 params, // parameter value
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385 NULL,
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386 NULL,
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387 0); // 0: result in text format
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388
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389 if(!result) return 1;
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390
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391 int ret = 1;
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392 if(PQntuples(result) == 1) {
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393 // sql insert succesful
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394 ret = 0;
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395
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396 char *id_str = PQgetvalue(result, 0, 0);
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397 char *lastmodified = PQgetvalue(result, 0, 1);
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398 char *creationdate = PQgetvalue(result, 0, 2);
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399
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400 if(new_resource_id) {
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diff changeset
401 if(!id_str || !util_strtoint(id_str, new_resource_id)) {
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402 ret = 1; // shouldn't happen
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403 log_ereport(LOG_FAILURE, "Postgresql VFS: sql_create_collection: Could not convert resource_id to int");
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404 }
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405 }
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406 if(resource_name) {
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407 *resource_name = nodename;
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408 }
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409 if(s) {
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410 pg_set_stat(s, 0, lastmodified, creationdate, NULL);
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411 }
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412 }
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diff changeset
413
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414 PQclear(result);
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415
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416 return ret;
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417 }
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418
285
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419 int pg_create_file(
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420 VFSContext *ctx,
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421 PgVFS *pg,
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422 const char *path,
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423 int64_t *new_resource_id,
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424 int64_t *res_parent_id,
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425 Oid *oid,
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426 const char **resource_name,
290
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diff changeset
427 struct stat *s,
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428 WSBool collection)
285
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429 {
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430 char *parent_path = util_parent_path(path);
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431 if(!parent_path) return 1;
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432
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433 size_t pathlen = strlen(path);
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434 char *pathf = NULL;
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435 if(pathlen > 1 && path[pathlen-1] == '/') {
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436 pathf = malloc(pathlen);
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437 memcpy(pathf, path, pathlen);
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438 pathf[pathlen-1] = 0; // remove trailing '/'
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439 path = pathf;
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440 }
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441
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442 const char *nodename = util_resource_name(path);
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443
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444 // resolve the parent path
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445 // if the parent path can't be resolved, we are done
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446 const char *resname;
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447 int64_t resource_id, parent_id;
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448 resource_id = -1;
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449 parent_id = -1;
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450 WSBool iscollection;
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451 Oid unused_oid = 0;
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452
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453 int err = pg_resolve_path(pg->connection, parent_path, &parent_id, &resource_id, &unused_oid, &resname, &iscollection, NULL, NULL, &ctx->vfs_errno);
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454 FREE(parent_path);
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455 if(err) {
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456 ctx->vfs_errno = ENOENT;
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457 if(pathf) free(pathf);
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458 return 1;
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459 }
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460
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461 // parent path exists, check if it is a collection
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462 if(!iscollection) {
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463 if(pathf) free(pathf);
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464 return 1;
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465 }
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466
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467 // create new Resource
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468 char resid_str[32];
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469 snprintf(resid_str, 32, "%" PRId64, resource_id); // convert parent resource_id to string
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470
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471 int ret;
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472 if(collection) {
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473 ret = pg_create_col(pg, resid_str, nodename, new_resource_id, resource_name, s);
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474 } else {
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475 ret = pg_create_res(pg, resid_str, nodename, new_resource_id, oid, resource_name, s);
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476 }
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477
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478 if(pathf) free(pathf);
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479
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480 if(res_parent_id) {
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481 // resource_id is still the id of the parent from previous pg_resolve_path call
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482 *res_parent_id = resource_id;
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483 }
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484
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485 return ret;
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486 }
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487
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488 int pg_remove_res(
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489 VFSContext *ctx,
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490 PgVFS *pg,
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491 int64_t resource_id,
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492 Oid oid)
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493 {
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494 // create transaction savepoint
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495 PGresult *result = PQexec(pg->connection, "savepoint del_res;");
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496 ExecStatusType execStatus = PQresultStatus(result);
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497 PQclear(result);
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498 if(execStatus != PGRES_COMMAND_OK) {
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499 return 1;
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500 }
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501
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502 if(oid > 0) {
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503 if(lo_unlink(pg->connection, oid) != 1) {
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504 // restore savepoint
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505 result = PQexec(pg->connection, "rollback to savepoint del_res;");
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506 PQclear(result);
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507 return 1; // error
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508 }
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509 }
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510
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511 char resid_str[32];
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512 snprintf(resid_str, 32, "%" PRId64, resource_id);
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513
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514 const char* params[1] = { resid_str };
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515 result = PQexecParams(
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516 pg->connection,
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517 sql_delete_res,
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518 1, // number of parameters
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519 NULL,
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520 params, // parameter value
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521 NULL,
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522 NULL,
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523 0); // 0: result in text format
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524
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525 execStatus = PQresultStatus(result);
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526 PQclear(result);
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527 int ret = 0;
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528
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529 if(execStatus != PGRES_COMMAND_OK) {
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530 ret = 1;
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531 // restore savepoint
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532 result = PQexec(pg->connection, "rollback to savepoint del_res;");
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533 PQclear(result);
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534 } else {
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535 // we don't need the savepoint anymore
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536 result = PQexec(pg->connection, "release savepoint del_res;");
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537 PQclear(result);
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538 }
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539
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540 return ret;
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541 }
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542
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543 int pg_update_resource(PgVFS *pg, int64_t resource_id, int64_t contentlength) {
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544 char resid_str[32];
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545 char ctlen_str[32];
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546 snprintf(resid_str, 32, "%" PRId64, resource_id);
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547 snprintf(ctlen_str, 32, "%" PRId64, contentlength);
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548
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549 const char* params[2] = { resid_str, ctlen_str };
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550 PGresult *result = PQexecParams(
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551 pg->connection,
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552 sql_update_resource,
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553 2, // number of parameters
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554 NULL,
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555 params, // parameter value
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556 NULL,
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557 NULL,
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558 0); // 0: result in text format
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559
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560 int ret = PQresultStatus(result) == PGRES_COMMAND_OK ? 0 : 1;
297
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561 PQclear(result);
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562 return ret;
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563 }
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564
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565 /* -------------------------- VFS functions -------------------------- */
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566
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567 SYS_FILE pg_vfs_open(VFSContext *ctx, const char *path, int oflags) {
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568 VFS *vfs = ctx->vfs;
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569 PgVFS *pg = vfs->instance;
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570
278
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571 const char *resname;
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572 int64_t resource_id, parent_id;
279
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573 resource_id = -1;
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574 parent_id = -1;
278
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575 WSBool iscollection;
281
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576 struct stat s;
346
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577 char etag[PG_ETAG_MAXLEN];
283
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578 Oid oid = 0;
346
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579 if(pg_resolve_path(pg->connection, path, &parent_id, &resource_id, &oid, &resname, &iscollection, &s, etag, &ctx->vfs_errno)) {
285
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580 if((oflags & O_CREAT) == O_CREAT) {
290
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581 if(pg_create_file(ctx, pg, path, &resource_id, &parent_id, &oid, &resname, &s, FALSE)) {
285
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582 return NULL;
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583 }
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584 iscollection = 0;
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585 } else {
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586 return NULL;
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587 }
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588 }
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589
278
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diff changeset
590 VFSFile *file = pool_malloc(ctx->pool, sizeof(VFSFile));
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591 if(!file) {
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592 return NULL;
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593 }
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594 PgFile *pgfile = pool_malloc(ctx->pool, sizeof(PgFile));
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595 if(!pgfile) {
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596 pool_free(ctx->pool, file);
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597 return NULL;
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598 }
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599
283
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diff changeset
600 int fd = -1;
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601 if(!iscollection) {
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602 if (PQstatus(pg->connection) != CONNECTION_OK) {
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603 fd = -2;
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604 }
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605
289
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606 int lo_mode = INV_READ;
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diff changeset
607 if((oflags & O_RDWR) == O_RDWR) {
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608 lo_mode = INV_READ|INV_WRITE;
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609 } else if((oflags & O_WRONLY) == O_WRONLY) {
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610 lo_mode = INV_WRITE;
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611 }
283
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612 fd = lo_open(pg->connection, oid, lo_mode);
341
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diff changeset
613 int err = 0;
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614 if(fd < 0) {
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615 err = 1;
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616 } else if((oflags & O_TRUNC) == O_TRUNC) {
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diff changeset
617 if(lo_truncate(pg->connection, fd, 0)) {
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618 lo_close(pg->connection, fd);
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619 err = 1;
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620 }
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621 }
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622
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diff changeset
623 if(err) {
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624 pool_free(ctx->pool, file);
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625 pool_free(ctx->pool, pgfile);
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626 return NULL;
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627 }
283
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628 }
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629
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630 pgfile->iscollection = iscollection;
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631 pgfile->resource_id = resource_id;
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632 pgfile->parent_id = parent_id;
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633 pgfile->oid = oid;
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634 pgfile->fd = fd;
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635 pgfile->oflags = oflags;
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636 pgfile->s = s;
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637 memcpy(pgfile->etag, etag, PG_ETAG_MAXLEN);
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638
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639 file->ctx = ctx;
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640 file->io = iscollection ? &pg_vfs_io_class : &pg_vfs_io_class;
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641 file->fd = -1;
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642 file->data = pgfile;
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643
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644 return file;
275
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645 }
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parents:
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646
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647 int pg_vfs_stat(VFSContext *ctx, const char *path, struct stat *buf) {
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648 VFS *vfs = ctx->vfs;
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649 PgVFS *pg = vfs->instance;
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650
281
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651 int64_t parent_id, resource_id;
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652 const char *resname;
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653 WSBool iscollection;
346
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654 return pg_resolve_path(pg->connection, path, &parent_id, &resource_id, NULL, &resname, &iscollection, buf, NULL, &ctx->vfs_errno);
275
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655 }
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parents:
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656
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657 int pg_vfs_fstat(VFSContext *ctx, SYS_FILE fd, struct stat *buf) {
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658 PgFile *pgfile = fd->data;
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659 memcpy(buf, &pgfile->s, sizeof(struct stat));
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660 return 0;
275
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661 }
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parents:
diff changeset
662
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663 VFS_DIR pg_vfs_opendir(VFSContext *ctx, const char *path) {
279
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664 VFSFile *file = pg_vfs_open(ctx, path, O_RDONLY);
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665 if(!file) return NULL;
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666 return pg_vfs_fdopendir(ctx, file);
275
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667 }
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parents:
diff changeset
668
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669 VFS_DIR pg_vfs_fdopendir(VFSContext *ctx, SYS_FILE fd) {
279
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670 PgFile *pg = fd->data;
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671 if(!pg->iscollection) {
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672 ctx->vfs_errno = ENOTDIR;
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673 return NULL;
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674 }
275
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675
279
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676 VFSDir *dir = pool_malloc(ctx->pool, sizeof(VFSDir));
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diff changeset
677 if(!dir) {
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678 fd->io->close(fd);
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679 ctx->vfs_errno = ENOMEM;
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680 return NULL;
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681 }
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682
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diff changeset
683 PgDir *pgdir = pool_malloc(ctx->pool, sizeof(PgDir));
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684 if(!pgdir) {
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diff changeset
685 fd->io->close(fd);
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diff changeset
686 pool_free(ctx->pool, dir);
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687 ctx->vfs_errno = ENOMEM;
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688 return NULL;
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diff changeset
689 }
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diff changeset
690 memset(pgdir, 0, sizeof(PgDir));
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diff changeset
691 pgdir->file = fd;
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692
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diff changeset
693 dir->ctx = ctx;
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diff changeset
694 dir->io = &pg_vfs_dirio_class;
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diff changeset
695 dir->data = pgdir;
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diff changeset
696 dir->fd = -1;
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697
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698 return dir;
275
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parents:
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699 }
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parents:
diff changeset
700
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parents:
diff changeset
701 int pg_vfs_mkdir(VFSContext *ctx, const char *path) {
290
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diff changeset
702 VFS *vfs = ctx->vfs;
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703 PgVFS *pg = vfs->instance;
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704
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diff changeset
705 const char *resname;
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diff changeset
706 int64_t resource_id, parent_id;
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diff changeset
707 resource_id = -1;
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diff changeset
708 parent_id = -1;
efc10acf539f implement pg vfs mkdir
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parents: 289
diff changeset
709 WSBool iscollection;
efc10acf539f implement pg vfs mkdir
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diff changeset
710 struct stat s;
efc10acf539f implement pg vfs mkdir
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parents: 289
diff changeset
711 Oid oid = 0;
346
784b24381bed extend postgresql vfs to store an etag in the file
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parents: 345
diff changeset
712 if(!pg_resolve_path(pg->connection, path, &parent_id, &resource_id, &oid, &resname, &iscollection, &s, NULL, &ctx->vfs_errno)) {
290
efc10acf539f implement pg vfs mkdir
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parents: 289
diff changeset
713 ctx->vfs_errno = EEXIST;
efc10acf539f implement pg vfs mkdir
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parents: 289
diff changeset
714 return 1;
efc10acf539f implement pg vfs mkdir
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parents: 289
diff changeset
715 }
efc10acf539f implement pg vfs mkdir
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 289
diff changeset
716
efc10acf539f implement pg vfs mkdir
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 289
diff changeset
717 if(pg_create_file(ctx, pg, path, NULL, NULL, NULL, NULL, NULL, TRUE)) {
efc10acf539f implement pg vfs mkdir
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parents: 289
diff changeset
718 return 1;
efc10acf539f implement pg vfs mkdir
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parents: 289
diff changeset
719 }
efc10acf539f implement pg vfs mkdir
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 289
diff changeset
720
efc10acf539f implement pg vfs mkdir
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parents: 289
diff changeset
721 return 0;
275
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parents:
diff changeset
722 }
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
723
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
724 int pg_vfs_unlink(VFSContext *ctx, const char *path) {
294
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diff changeset
725 VFS *vfs = ctx->vfs;
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
726 PgVFS *pg = vfs->instance;
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
727
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
728 const char *resname;
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
729 int64_t resource_id, parent_id;
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
730 resource_id = -1;
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
731 parent_id = -1;
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
732 WSBool iscollection;
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
733 Oid oid = 0;
346
784b24381bed extend postgresql vfs to store an etag in the file
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parents: 345
diff changeset
734 if(pg_resolve_path(pg->connection, path, &parent_id, &resource_id, &oid, &resname, &iscollection, NULL, NULL, &ctx->vfs_errno)) {
294
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
735 return 1;
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
736 }
277a5896a2ec implement pg unlink
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 292
diff changeset
737
277a5896a2ec implement pg unlink
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 292
diff changeset
738 if(iscollection) {
277a5896a2ec implement pg unlink
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 292
diff changeset
739 ctx->vfs_errno = EISDIR;
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
740 return 1;
277a5896a2ec implement pg unlink
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 292
diff changeset
741 }
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
742
296
78e92337fa4e implement pg rmdir
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diff changeset
743 return pg_remove_res(ctx, pg, resource_id, oid);
275
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parents:
diff changeset
744 }
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
745
295
73a1243fce15 add pg mkdir tests
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diff changeset
746 int pg_vfs_rmdir(VFSContext *ctx, const char *path) {
296
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parents: 295
diff changeset
747 VFS *vfs = ctx->vfs;
78e92337fa4e implement pg rmdir
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parents: 295
diff changeset
748 PgVFS *pg = vfs->instance;
295
73a1243fce15 add pg mkdir tests
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parents: 294
diff changeset
749
296
78e92337fa4e implement pg rmdir
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diff changeset
750 const char *resname;
78e92337fa4e implement pg rmdir
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parents: 295
diff changeset
751 int64_t resource_id, parent_id;
78e92337fa4e implement pg rmdir
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parents: 295
diff changeset
752 resource_id = -1;
78e92337fa4e implement pg rmdir
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parents: 295
diff changeset
753 parent_id = -1;
78e92337fa4e implement pg rmdir
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parents: 295
diff changeset
754 WSBool iscollection;
346
784b24381bed extend postgresql vfs to store an etag in the file
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parents: 345
diff changeset
755 if(pg_resolve_path(pg->connection, path, &parent_id, &resource_id, NULL, &resname, &iscollection, NULL, NULL, &ctx->vfs_errno)) {
296
78e92337fa4e implement pg rmdir
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parents: 295
diff changeset
756 return 1;
78e92337fa4e implement pg rmdir
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 295
diff changeset
757 }
78e92337fa4e implement pg rmdir
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 295
diff changeset
758
78e92337fa4e implement pg rmdir
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 295
diff changeset
759 if(!iscollection) {
78e92337fa4e implement pg rmdir
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 295
diff changeset
760 ctx->vfs_errno = ENOTDIR;
78e92337fa4e implement pg rmdir
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parents: 295
diff changeset
761 return 1;
78e92337fa4e implement pg rmdir
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 295
diff changeset
762 }
78e92337fa4e implement pg rmdir
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 295
diff changeset
763
78e92337fa4e implement pg rmdir
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parents: 295
diff changeset
764 return pg_remove_res(ctx, pg, resource_id, 0);
275
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parents:
diff changeset
765 }
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
766
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
767
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
768 /* -------------------------- VFS_IO functions -------------------------- */
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
769
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
770 ssize_t pg_vfs_io_read(SYS_FILE fd, void *buf, size_t nbyte) {
283
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diff changeset
771 PgVFS *pgvfs = fd->ctx->vfs->instance;
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diff changeset
772 PgFile *pg = fd->data;
25e5b771677d minimal working send_file with postgresql vfs
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diff changeset
773 return lo_read(pgvfs->connection, pg->fd, buf, nbyte);
275
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parents:
diff changeset
774 }
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
775
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
776 ssize_t pg_vfs_io_write(SYS_FILE fd, const void *buf, size_t nbyte) {
283
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diff changeset
777 PgVFS *pgvfs = fd->ctx->vfs->instance;
284
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diff changeset
778 PgFile *pg = fd->data;
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diff changeset
779 return lo_write(pgvfs->connection, pg->fd, buf, nbyte);
275
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parents:
diff changeset
780 }
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
781
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
782 ssize_t pg_vfs_io_pread(SYS_FILE fd, void *buf, size_t nbyte, off_t offset) {
283
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diff changeset
783 PgVFS *pgvfs = fd->ctx->vfs->instance;
284
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diff changeset
784 PgFile *pg = fd->data;
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parents: 283
diff changeset
785 if(lo_lseek64(pgvfs->connection, pg->fd, offset, SEEK_SET) == -1) {
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parents: 283
diff changeset
786 return -1;
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parents: 283
diff changeset
787 }
eab579b8c80d add missing postgresql vfs io functions
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parents: 283
diff changeset
788 return lo_read(pgvfs->connection, pg->fd, buf, nbyte);
275
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
789 }
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
790
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
791 ssize_t pg_vfs_io_pwrite(SYS_FILE fd, const void *buf, size_t nbyte, off_t offset) {
283
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diff changeset
792 PgVFS *pgvfs = fd->ctx->vfs->instance;
284
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diff changeset
793 PgFile *pg = fd->data;
eab579b8c80d add missing postgresql vfs io functions
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parents: 283
diff changeset
794 if(lo_lseek64(pgvfs->connection, pg->fd, offset, SEEK_SET) == -1) {
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parents: 283
diff changeset
795 return -1;
eab579b8c80d add missing postgresql vfs io functions
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parents: 283
diff changeset
796 }
eab579b8c80d add missing postgresql vfs io functions
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parents: 283
diff changeset
797 return lo_write(pgvfs->connection, pg->fd, buf, nbyte);
275
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
798 }
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
799
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
800 off_t pg_vfs_io_seek(SYS_FILE fd, off_t offset, int whence) {
283
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diff changeset
801 PgVFS *pgvfs = fd->ctx->vfs->instance;
284
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diff changeset
802 PgFile *pg = fd->data;
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diff changeset
803 return lo_lseek64(pgvfs->connection, pg->fd, offset, whence);
275
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
804 }
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
805
291
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parents: 290
diff changeset
806 off_t pg_vfs_io_tell(SYS_FILE fd) {
0f46b645aea4 add pg_vfs_io_tell
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parents: 290
diff changeset
807 PgVFS *pgvfs = fd->ctx->vfs->instance;
0f46b645aea4 add pg_vfs_io_tell
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diff changeset
808 PgFile *pg = fd->data;
0f46b645aea4 add pg_vfs_io_tell
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parents: 290
diff changeset
809 return lo_tell64(pgvfs->connection, pg->fd);
0f46b645aea4 add pg_vfs_io_tell
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diff changeset
810 }
0f46b645aea4 add pg_vfs_io_tell
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parents: 290
diff changeset
811
275
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diff changeset
812 void pg_vfs_io_close(SYS_FILE fd) {
282
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parents: 281
diff changeset
813 pool_handle_t *pool = fd->ctx->pool;
292
7c31bcd5b4be update pg resource metadata on close
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diff changeset
814 PgVFS *pgvfs = fd->ctx->vfs->instance;
282
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diff changeset
815 PgFile *pg = fd->data;
275
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diff changeset
816
283
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diff changeset
817 if(pg->fd >= 0) {
292
7c31bcd5b4be update pg resource metadata on close
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parents: 291
diff changeset
818 if((pg->oflags & (O_WRONLY|O_RDWR)) > 0) {
7c31bcd5b4be update pg resource metadata on close
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parents: 291
diff changeset
819 // file modified, update length and lastmodified
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parents: 291
diff changeset
820 off_t len = pg_vfs_io_seek(fd, 0, SEEK_END);
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parents: 291
diff changeset
821 if(len < 0) len = 0;
7c31bcd5b4be update pg resource metadata on close
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parents: 291
diff changeset
822
7c31bcd5b4be update pg resource metadata on close
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parents: 291
diff changeset
823 pg_update_resource(pgvfs, pg->resource_id, len);
7c31bcd5b4be update pg resource metadata on close
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parents: 291
diff changeset
824 }
7c31bcd5b4be update pg resource metadata on close
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parents: 291
diff changeset
825
283
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diff changeset
826 PgVFS *pgvfs = fd->ctx->vfs->instance;
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parents: 282
diff changeset
827 lo_close(pgvfs->connection, pg->fd);
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diff changeset
828 }
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parents: 282
diff changeset
829
282
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parents: 281
diff changeset
830 pool_free(pool, pg);
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parents: 281
diff changeset
831 pool_free(pool, fd);
275
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parents:
diff changeset
832 }
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
833
345
5832e10fc59a add optional getetag function to VFS API
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parents: 344
diff changeset
834 const char *pg_vfs_io_getetag(SYS_FILE fd) {
346
784b24381bed extend postgresql vfs to store an etag in the file
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parents: 345
diff changeset
835 PgFile *pg = fd->data;
784b24381bed extend postgresql vfs to store an etag in the file
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parents: 345
diff changeset
836 return pg->etag;
345
5832e10fc59a add optional getetag function to VFS API
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parents: 344
diff changeset
837 }
275
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parents:
diff changeset
838
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
839 /* -------------------------- VFS_DIRIO functions -------------------------- */
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
840
279
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parents: 278
diff changeset
841 static int load_dir(VFSDir *dir, PgDir *pg) {
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parents: 278
diff changeset
842 VFS *vfs = dir->ctx->vfs;
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diff changeset
843 PgVFS *pgvfs = vfs->instance;
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parents: 278
diff changeset
844 PgFile *pgfd = pg->file->data;
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parents: 278
diff changeset
845 PgDir *pgdir = dir->data;
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parents: 278
diff changeset
846
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diff changeset
847 char resid_param[32];
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848 snprintf(resid_param, 32, "%" PRId64, pgfd->resource_id);
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849
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diff changeset
850 const char *param = resid_param;
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851
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diff changeset
852 PGresult *result = PQexecParams(
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diff changeset
853 pgvfs->connection,
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854 sql_get_children,
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855 1, // number of parameters
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856 NULL,
281
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857 &param, // param: parent resource_id
279
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858 NULL,
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diff changeset
859 NULL,
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860 0); // 0: result in text format
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861 if(!result) return 1;
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862
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863 pgdir->result = result;
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864 pgdir->nrows = PQntuples(result);
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865 return 0;
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866 }
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867
275
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868 int pg_vfs_dirio_readdir(VFS_DIR dir, VFS_ENTRY *entry, int getstat) {
279
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869 PgDir *pg = dir->data;
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870 if(!pg->result) {
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871 if(load_dir(dir, pg)) {
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872 return 0;
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873 }
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874 }
275
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diff changeset
875
279
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876 if(pg->row >= pg->nrows) {
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877 return 0; // EOF
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878 }
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879
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diff changeset
880 entry->name = PQgetvalue(pg->result, pg->row, 1);
353
382d6c221807 fix pg_vfs_dirio_readdir not initializing some VFS_ENTRY fields
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881 entry->stat_errno = 0;
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882 entry->stat_extra = NULL;
279
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883
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884 if(getstat) {
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885 memset(&entry->stat, 0, sizeof(struct stat));
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886
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887 char *iscollection = PQgetvalue(pg->result, pg->row, 2);
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888 char *lastmodified = PQgetvalue(pg->result, pg->row, 3);
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889 char *creationdate = PQgetvalue(pg->result, pg->row, 4);
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890 char *contentlength = PQgetvalue(pg->result, pg->row, 5);
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891 pg_set_stat(&entry->stat, iscollection, lastmodified, creationdate, contentlength);
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892 }
279
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893
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894 pg->row++;
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895 return 1;
275
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896 }
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parents:
diff changeset
897
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diff changeset
898 void pg_vfs_dirio_close(VFS_DIR dir) {
280
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899 pool_handle_t *pool = dir->ctx->pool;
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900 PgDir *pg = dir->data;
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901 if(pg->result) {
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902 PQclear(pg->result);
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903 }
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904 PgFile *pgfile = pg->file->data;
275
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905
280
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906 pool_free(pool, pgfile);
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diff changeset
907 pool_free(pool, pg->file);
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diff changeset
908 pool_free(pool, pg);
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909 pool_free(pool, dir);
275
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diff changeset
910 }
304
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911
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diff changeset
912 time_t pg_convert_timestamp(const char *timestamp) {
311
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913 struct tm tm;
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914 if(pg_convert_timestamp_tm(timestamp, &tm)) {
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915 return 0;
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916 }
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917 #ifdef __FreeBSD__
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918 return timelocal(&tm);
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919 #else
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920 return mktime(&tparts) - timezone;
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921 #endif
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922 }
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923
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924 int pg_convert_timestamp_tm(const char *timestamp, struct tm *tm) {
304
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925 // TODO: this is a very basic implementation that needs some work
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926 // format yyyy-mm-dd HH:MM:SS
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diff changeset
927
311
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diff changeset
928 memset(tm, 0, sizeof(struct tm));
304
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diff changeset
929 size_t len = timestamp ? strlen(timestamp) : 0;
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930 if(len < 19) {
311
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diff changeset
931 return 1;
304
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932 } else if(len > 63) {
311
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diff changeset
933 return 1;
304
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diff changeset
934 }
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diff changeset
935
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diff changeset
936 char buf[64];
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diff changeset
937 memcpy(buf, timestamp, len);
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diff changeset
938
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diff changeset
939 char *year_str = buf;
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diff changeset
940 year_str[4] = '\0';
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diff changeset
941
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942 char *month_str = buf + 5;
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diff changeset
943 month_str[2] = '\0';
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diff changeset
944
33911d44111d add basic parser for pg timestamps
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diff changeset
945 char *day_str = buf + 8;
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diff changeset
946 day_str[2] = '\0';
33911d44111d add basic parser for pg timestamps
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diff changeset
947
33911d44111d add basic parser for pg timestamps
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parents: 298
diff changeset
948 char *hour_str = buf + 11;
33911d44111d add basic parser for pg timestamps
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diff changeset
949 hour_str[2] = '\0';
33911d44111d add basic parser for pg timestamps
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parents: 298
diff changeset
950
33911d44111d add basic parser for pg timestamps
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parents: 298
diff changeset
951 char *minute_str = buf + 14;
33911d44111d add basic parser for pg timestamps
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parents: 298
diff changeset
952 minute_str[2] = '\0';
33911d44111d add basic parser for pg timestamps
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parents: 298
diff changeset
953
33911d44111d add basic parser for pg timestamps
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parents: 298
diff changeset
954 char *second_str = buf + 17;
33911d44111d add basic parser for pg timestamps
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parents: 298
diff changeset
955 second_str[2] = '\0';
33911d44111d add basic parser for pg timestamps
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diff changeset
956
311
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diff changeset
957 tm->tm_year = atoi(year_str) - 1900;
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parents: 305
diff changeset
958 tm->tm_mon = atoi(month_str) - 1;
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parents: 305
diff changeset
959 tm->tm_mday = atoi(day_str);
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parents: 305
diff changeset
960 tm->tm_hour = atoi(hour_str);
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parents: 305
diff changeset
961 tm->tm_min = atoi(minute_str);
e676ed461b5b implement pg getlastmodified propfind (and prepare creationdate)
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parents: 305
diff changeset
962 tm->tm_sec = atoi(second_str);
304
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parents: 298
diff changeset
963
311
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parents: 305
diff changeset
964 return 0;
304
33911d44111d add basic parser for pg timestamps
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parents: 298
diff changeset
965 }

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