src/server/plugins/postgresql/vfs.c

Tue, 26 Apr 2022 14:33:58 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Tue, 26 Apr 2022 14:33:58 +0200
branch
webdav
changeset 315
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parent 311
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child 341
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permissions
-rw-r--r--

fix sql query for selecting specific properties

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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 };
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56
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57 static VFS_DIRIO pg_vfs_dirio_class = {
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58 pg_vfs_dirio_readdir,
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59 pg_vfs_dirio_close
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60 };
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61
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62
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63 /*
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64 * SQL Queries
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65 */
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66
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67 // Resolves a path into resource_id and parent_id
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68 // params: $1: path string
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69 static const char *sql_resolve_path =
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70 "with recursive resolvepath as (\n\
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71 select\n\
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72 resource_id,\n\
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73 parent_id,\n\
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74 '' as fullpath,\n\
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75 resoid,\n\
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76 iscollection,\n\
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77 lastmodified,\n\
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78 creationdate,\n\
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79 contentlength,\n\
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80 regexp_split_to_array($1, '/') as pathelm,\n\
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81 1 as pathdepth\n\
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82 from Resource\n\
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83 where parent_id is null\n\
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84 union\n\
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85 select\n\
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86 r.resource_id,\n\
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87 r.parent_id,\n\
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88 p.fullpath || '/' || r.nodename,\n\
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89 r.resoid,\n\
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90 r.iscollection,\n\
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91 r.lastmodified,\n\
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92 r.creationdate,\n\
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93 r.contentlength,\n\
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94 p.pathelm,\n\
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95 p.pathdepth + 1\n\
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96 from Resource r\n\
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97 inner join resolvepath p on r.parent_id = p.resource_id\n\
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98 where p.pathelm[p.pathdepth+1] = r.nodename\n\
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99 )\n\
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100 select resource_id, parent_id, fullpath, resoid, iscollection, lastmodified, creationdate, contentlength from resolvepath\n\
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101 where fullpath = $1 ;";
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102
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103 // Same as sql_resolve_path, but it returns the root collection
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104 // params: $1: path string (should be '/')
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105 static const char *sql_get_root = "select resource_id, parent_id, $1 as fullpath, resoid, true as iscollection, lastmodified, creationdate, contentlength from Resource where parent_id is null;";
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106
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107 // Get all children of a specific collection
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108 // params: $1: parent resource_id
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109 static const char *sql_get_children = "select resource_id, nodename, iscollection, lastmodified, creationdate, contentlength from Resource where parent_id = $1;";
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110
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111 // Get resource
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112 // params: $1: resource_id
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113 static const char *sql_get_resource = "select resource_id, nodename, iscollection, lastmodified, creationdate, contentlength from Resource where resource_id = $1;";
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114
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115 // Create resource
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116 // params: $1: parent_id
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117 // $2: node name
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118 static const char *sql_create_resource =
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119 "insert into Resource (parent_id, nodename, iscollection, lastmodified, creationdate, contentlength, resoid) values\n\
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120 ($1, $2, false, now(), now(), 0, lo_creat(-1))\n\
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121 returning resource_id, resoid, lastmodified, creationdate;";
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122
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123 // Create collection
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124 // params: $1: parent_id
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125 // $2: node name
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126 static const char *sql_create_collection =
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127 "insert into Resource (parent_id, nodename, iscollection, lastmodified, creationdate, contentlength) values\n\
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128 ($1, $2, true, now(), now(), 0)\n\
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129 returning resource_id, lastmodified, creationdate;";
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130
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131 // Update resource metadata
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132 // params: $1: resource_id
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133 // $2: contentlength
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134 static const char *sql_update_resource = "update Resource set contentlength = $2, lastmodified = now() where resource_id = $1;";
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135
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136 // Delete a resource
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137 // params: $1: resource_id
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138 static const char *sql_delete_res = "delete from Resource where parent_id is not null and resource_id = $1;";
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139
276
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140 VFS* pg_vfs_create(Session *sn, Request *rq, pblock *pb) {
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141 // resourcepool is required
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142 char *resource_pool = pblock_findval("resourcepool", pb);
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143 if(!resource_pool) {
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144 log_ereport(LOG_MISCONFIG, "pg_vfs_create: missing resourcepool parameter");
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145 return NULL;
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146 }
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147
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148 // get the resource first (most likely to fail due to misconfig)
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149 ResourceData *resdata = resourcepool_lookup(sn, rq, resource_pool, 0);
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150 if(!resdata) {
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151 log_ereport(LOG_MISCONFIG, "postgresql vfs: resource pool %s not found", resource_pool);
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152 return NULL;
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153 }
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154 // resdata will be freed automatically when the request is finished
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155
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156 return pg_vfs_create_from_resourcedata(sn, rq, resdata);
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157 }
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158
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159 VFS* pg_vfs_create_from_resourcedata(Session *sn, Request *rq, ResourceData *resdata) {
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160 // Create a new VFS object and a separate instance object
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161 // VFS contains fptrs that can be copied from pg_vfs_class
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162 // instance contains request specific data (PGconn)
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163 VFS *vfs = pool_malloc(sn->pool, sizeof(VFS));
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164 if(!vfs) {
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165 return NULL;
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166 }
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167
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168 PgVFS *vfs_priv = pool_malloc(sn->pool, sizeof(PgVFS));
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169 if(!vfs_priv) {
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170 pool_free(sn->pool, vfs);
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171 return NULL;
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172 }
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173 vfs_priv->connection = resdata->data;
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174 vfs_priv->pg_resource = resdata;
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175
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176 memcpy(vfs, &pg_vfs_class, sizeof(VFS));
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177 vfs->flags = 0;
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178 vfs->instance = vfs_priv;
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179
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180 return vfs;
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181 }
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182
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183
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184 int pg_resolve_path(
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185 PGconn *connection,
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186 const char *path,
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187 int64_t *parent_id,
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188 int64_t *resource_id,
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189 Oid *oid,
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190 const char **resource_name,
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191 WSBool *iscollection,
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192 struct stat *s,
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193 int *res_errno)
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194 {
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195 // basic path validation
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196 if(!path) return 1;
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197 size_t pathlen = strlen(path);
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198 if(pathlen == 0) return 1;
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199 if(path[0] != '/') {
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200 return 1;
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201 }
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202
281
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203 char *pathf = NULL;
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204 if(pathlen > 1 && path[pathlen-1] == '/') {
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205 pathf = malloc(pathlen);
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206 memcpy(pathf, path, pathlen);
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207 pathf[pathlen-1] = 0; // remove trailing '/'
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208 path = pathf;
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209 }
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210
278
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211 // get last node of path
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212 *resource_name = util_resource_name(path);
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213
281
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214 const char *sql = pathlen == 1 ? sql_get_root : sql_resolve_path;
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215 PGresult *result = PQexecParams(
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216 connection,
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217 sql,
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218 1, // number of parameters
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219 NULL,
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220 &path, // parameter value
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221 NULL,
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222 NULL,
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223 0); // 0: result in text format
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224
281
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225 if(pathf) {
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226 free(pathf);
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227 }
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228
278
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229 if(!result) return 1;
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230
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231 int ret = 1;
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232 //int nfields = PQnfields(result);
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233 int nrows = PQntuples(result);
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234 if(nrows == 1) {
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235 char *resource_id_str = PQgetvalue(result, 0, 0);
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236 char *parent_id_str = PQgetvalue(result, 0, 1);
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237 char *iscol = PQgetvalue(result, 0, 4);
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238 char *lastmodified = PQgetvalue(result, 0, 5);
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239 char *creationdate = PQgetvalue(result, 0, 6);
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240 char *contentlength = PQgetvalue(result, 0, 7);
278
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241 if(resource_id_str && parent_id_str) {
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242 if(util_strtoint(resource_id_str, resource_id)) {
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243 ret = 0; // success
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244 }
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245 // optionally get parent_id
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246 util_strtoint(parent_id_str, parent_id);
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247 }
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248
283
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249 if(oid) {
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250 char *resoid = PQgetvalue(result, 0, 3);
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251 int64_t roid;
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252 if(resoid && util_strtoint(resoid, &roid)) {
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253 *oid = roid;
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254 }
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255 }
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256
281
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257 if(iscollection && iscol) {
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258 *iscollection = iscol[0] == 't' ? TRUE : FALSE;
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259 }
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260
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261 if(s) {
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262 pg_set_stat(s, iscol, lastmodified, creationdate, contentlength);
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263 }
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264 } else if(res_errno) {
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265 *res_errno = ENOENT;
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266 }
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267
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268 PQclear(result);
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269
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270 return ret;
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271 }
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272
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273
282
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274 void pg_set_stat(
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275 struct stat *s,
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276 const char *iscollection,
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277 const char *lastmodified,
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278 const char *creationdate,
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279 const char *contentlength)
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280 {
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281 memset(s, 0, sizeof(struct stat));
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282 if(iscollection) {
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283 WSBool iscol = iscollection[0] == 't' ? TRUE : FALSE;
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284 if(iscol) {
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285 s->st_mode |= 0x4000;
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286 }
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287 }
304
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288 s->st_mtime = pg_convert_timestamp(lastmodified);
283
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289
282
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290 if(contentlength) {
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291 int64_t len;
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292 if(util_strtoint(contentlength, &len)) {
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293 s->st_size = len;
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294 }
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295 }
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296 }
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297
290
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298 static int pg_create_res(
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299 PgVFS *pg,
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300 const char *resparentid_str,
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301 const char *nodename,
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302 int64_t *new_resource_id,
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303 Oid *oid,
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304 const char **resource_name,
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305 struct stat *s)
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306 {
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307 const char* params[2] = { resparentid_str, nodename };
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308 PGresult *result = PQexecParams(
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309 pg->connection,
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310 sql_create_resource,
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311 2, // number of parameters
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312 NULL,
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313 params, // parameter value
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314 NULL,
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315 NULL,
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316 0); // 0: result in text format
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317
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318 if(!result) return 1;
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319
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320 int ret = 1;
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321 if(PQntuples(result) == 1) {
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322 // sql insert succesful
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323 ret = 0;
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324
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325 char *id_str = PQgetvalue(result, 0, 0);
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326 char *oid_str = PQgetvalue(result, 0, 1);
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327 char *lastmodified = PQgetvalue(result, 0, 2);
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328 char *creationdate = PQgetvalue(result, 0, 3);
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329
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330 if(new_resource_id) {
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331 if(!id_str || !util_strtoint(id_str, new_resource_id)) {
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332 ret = 1; // shouldn't happen
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333 log_ereport(LOG_FAILURE, "Postgresql VFS: sql_create_resource: Could not convert resource_id to int");
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334 }
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335 }
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336 if(oid) {
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337 int64_t i;
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338 if(!oid_str || !util_strtoint(oid_str, &i)) {
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339 ret = 1; // shouldn't happen
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340 log_ereport(LOG_FAILURE, "Postgresql VFS: sql_create_resource: Could not convert oid to int");
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341 } else {
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342 *oid = i;
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343 }
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344 }
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345 if(resource_name) {
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346 *resource_name = nodename;
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347 }
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348 if(s) {
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349 pg_set_stat(s, 0, lastmodified, creationdate, NULL);
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350 }
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351 }
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352
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353 PQclear(result);
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354
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355 return ret;
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356 }
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357
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358
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359 static int pg_create_col(
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360 PgVFS *pg,
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361 const char *resparentid_str,
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362 const char *nodename,
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363 int64_t *new_resource_id,
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364 const char **resource_name,
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365 struct stat *s)
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366 {
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367 const char* params[2] = { resparentid_str, nodename };
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368 PGresult *result = PQexecParams(
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369 pg->connection,
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370 sql_create_collection,
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371 2, // number of parameters
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372 NULL,
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373 params, // parameter value
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374 NULL,
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375 NULL,
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376 0); // 0: result in text format
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377
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378 if(!result) return 1;
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379
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380 int ret = 1;
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381 if(PQntuples(result) == 1) {
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382 // sql insert succesful
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383 ret = 0;
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384
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385 char *id_str = PQgetvalue(result, 0, 0);
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386 char *lastmodified = PQgetvalue(result, 0, 1);
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387 char *creationdate = PQgetvalue(result, 0, 2);
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388
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389 if(new_resource_id) {
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390 if(!id_str || !util_strtoint(id_str, new_resource_id)) {
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391 ret = 1; // shouldn't happen
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392 log_ereport(LOG_FAILURE, "Postgresql VFS: sql_create_collection: Could not convert resource_id to int");
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393 }
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394 }
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395 if(resource_name) {
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396 *resource_name = nodename;
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397 }
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398 if(s) {
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399 pg_set_stat(s, 0, lastmodified, creationdate, NULL);
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400 }
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401 }
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402
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403 PQclear(result);
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404
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405 return ret;
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406 }
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407
285
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408 int pg_create_file(
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409 VFSContext *ctx,
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410 PgVFS *pg,
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411 const char *path,
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412 int64_t *new_resource_id,
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413 int64_t *res_parent_id,
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414 Oid *oid,
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415 const char **resource_name,
290
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416 struct stat *s,
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417 WSBool collection)
285
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418 {
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419 char *parent_path = util_parent_path(path);
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420 if(!parent_path) return 1;
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421
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422 const char *nodename = util_resource_name(path);
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423
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424 // resolve the parent path
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425 // if the parent path can't be resolved, we are done
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426 const char *resname;
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427 int64_t resource_id, parent_id;
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428 resource_id = -1;
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429 parent_id = -1;
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430 WSBool iscollection;
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431 Oid unused_oid = 0;
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432
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433 int err = pg_resolve_path(pg->connection, parent_path, &parent_id, &resource_id, &unused_oid, &resname, &iscollection, NULL, &ctx->vfs_errno);
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434 FREE(parent_path);
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435 if(err) {
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436 return 1;
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437 }
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438
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439 // parent path exists, check if it is a collection
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440 if(!iscollection) {
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441 return 1;
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442 }
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443
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444 // create new Resource
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445 char resid_str[32];
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446 snprintf(resid_str, 32, "%" PRId64, resource_id); // convert parent resource_id to string
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447
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448 int ret;
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449 if(collection) {
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450 ret = pg_create_col(pg, resid_str, nodename, new_resource_id, resource_name, s);
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451 } else {
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452 ret = pg_create_res(pg, resid_str, nodename, new_resource_id, oid, resource_name, s);
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453 }
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454
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455 if(res_parent_id) {
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456 // resource_id is still the id of the parent from previous pg_resolve_path call
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457 *res_parent_id = resource_id;
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458 }
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459
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460 return ret;
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461 }
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462
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463 int pg_remove_res(
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464 VFSContext *ctx,
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465 PgVFS *pg,
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466 int64_t resource_id,
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467 Oid oid)
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468 {
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469 // create transaction savepoint
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470 PGresult *result = PQexec(pg->connection, "savepoint del_res;");
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471 ExecStatusType execStatus = PQresultStatus(result);
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472 PQclear(result);
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473 if(execStatus != PGRES_COMMAND_OK) {
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474 return 1;
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475 }
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476
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477 if(oid > 0) {
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478 if(lo_unlink(pg->connection, oid) != 1) {
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479 // restore savepoint
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480 result = PQexec(pg->connection, "rollback to savepoint del_res;");
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481 PQclear(result);
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482 return 1; // error
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483 }
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484 }
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485
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486 char resid_str[32];
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487 snprintf(resid_str, 32, "%" PRId64, resource_id);
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488
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489 const char* params[1] = { resid_str };
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490 result = PQexecParams(
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491 pg->connection,
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492 sql_delete_res,
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493 1, // number of parameters
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494 NULL,
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495 params, // parameter value
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496 NULL,
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497 NULL,
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498 0); // 0: result in text format
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499
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500 execStatus = PQresultStatus(result);
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501 PQclear(result);
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502 int ret = 0;
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503
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504 if(execStatus != PGRES_COMMAND_OK) {
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505 ret = 1;
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506 // restore savepoint
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507 result = PQexec(pg->connection, "rollback to savepoint del_res;");
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508 PQclear(result);
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509 } else {
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510 // we don't need the savepoint anymore
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511 result = PQexec(pg->connection, "release savepoint del_res;");
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512 PQclear(result);
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513 }
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514
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515 return ret;
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516 }
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517
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518 int pg_update_resource(PgVFS *pg, int64_t resource_id, int64_t contentlength) {
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519 char resid_str[32];
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520 char ctlen_str[32];
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521 snprintf(resid_str, 32, "%" PRId64, resource_id);
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522 snprintf(ctlen_str, 32, "%" PRId64, contentlength);
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523
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524 const char* params[2] = { resid_str, ctlen_str };
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525 PGresult *result = PQexecParams(
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526 pg->connection,
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527 sql_update_resource,
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528 2, // number of parameters
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529 NULL,
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530 params, // parameter value
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531 NULL,
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532 NULL,
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533 0); // 0: result in text format
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534
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535 int ret = PQresultStatus(result) == PGRES_COMMAND_OK ? 0 : 1;
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536 PQclear(result);
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537 return ret;
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538 }
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539
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540 /* -------------------------- VFS functions -------------------------- */
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541
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542 SYS_FILE pg_vfs_open(VFSContext *ctx, const char *path, int oflags) {
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543 VFS *vfs = ctx->vfs;
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544 PgVFS *pg = vfs->instance;
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545
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546 const char *resname;
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547 int64_t resource_id, parent_id;
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548 resource_id = -1;
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549 parent_id = -1;
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550 WSBool iscollection;
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551 struct stat s;
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552 Oid oid = 0;
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553 if(pg_resolve_path(pg->connection, path, &parent_id, &resource_id, &oid, &resname, &iscollection, &s, &ctx->vfs_errno)) {
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554 if((oflags & O_CREAT) == O_CREAT) {
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555 if(pg_create_file(ctx, pg, path, &resource_id, &parent_id, &oid, &resname, &s, FALSE)) {
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556 return NULL;
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557 }
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558 iscollection = 0;
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559 } else {
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560 return NULL;
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561 }
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562 }
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563
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564 VFSFile *file = pool_malloc(ctx->pool, sizeof(VFSFile));
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565 if(!file) {
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566 return NULL;
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567 }
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568 PgFile *pgfile = pool_malloc(ctx->pool, sizeof(PgFile));
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569 if(!pgfile) {
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570 pool_free(ctx->pool, file);
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571 return NULL;
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572 }
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573
283
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574 int fd = -1;
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575 if(!iscollection) {
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diff changeset
576 if (PQstatus(pg->connection) != CONNECTION_OK) {
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577 fd = -2;
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578 }
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579
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diff changeset
580 int lo_mode = INV_READ;
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parents: 285
diff changeset
581 if((oflags & O_RDWR) == O_RDWR) {
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diff changeset
582 lo_mode = INV_READ|INV_WRITE;
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diff changeset
583 } else if((oflags & O_WRONLY) == O_WRONLY) {
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584 lo_mode = INV_WRITE;
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585 }
283
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diff changeset
586 fd = lo_open(pg->connection, oid, lo_mode);
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587 }
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588
278
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diff changeset
589 pgfile->iscollection = iscollection;
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590 pgfile->resource_id = resource_id;
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591 pgfile->parent_id = parent_id;
283
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diff changeset
592 pgfile->oid = oid;
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diff changeset
593 pgfile->fd = fd;
292
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diff changeset
594 pgfile->oflags = oflags;
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diff changeset
595 pgfile->s = s;
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596
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diff changeset
597 file->ctx = ctx;
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598 file->io = iscollection ? &pg_vfs_io_class : &pg_vfs_io_class;
278
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599 file->fd = -1;
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diff changeset
600 file->data = pgfile;
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diff changeset
601
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602 return file;
275
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603 }
535004faa1a5 add empty postgresql VFS functions
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parents:
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604
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605 int pg_vfs_stat(VFSContext *ctx, const char *path, struct stat *buf) {
305
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606 VFS *vfs = ctx->vfs;
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diff changeset
607 PgVFS *pg = vfs->instance;
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608
281
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609 int64_t parent_id, resource_id;
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610 const char *resname;
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diff changeset
611 WSBool iscollection;
305
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612 return pg_resolve_path(pg->connection, path, &parent_id, &resource_id, NULL, &resname, &iscollection, buf, &ctx->vfs_errno);
275
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613 }
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parents:
diff changeset
614
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parents:
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615 int pg_vfs_fstat(VFSContext *ctx, SYS_FILE fd, struct stat *buf) {
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616 PgFile *pgfile = fd->data;
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617 memcpy(buf, &pgfile->s, sizeof(struct stat));
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618 return 0;
275
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619 }
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parents:
diff changeset
620
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diff changeset
621 VFS_DIR pg_vfs_opendir(VFSContext *ctx, const char *path) {
279
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622 VFSFile *file = pg_vfs_open(ctx, path, O_RDONLY);
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623 if(!file) return NULL;
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624 return pg_vfs_fdopendir(ctx, file);
275
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625 }
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parents:
diff changeset
626
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parents:
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627 VFS_DIR pg_vfs_fdopendir(VFSContext *ctx, SYS_FILE fd) {
279
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628 PgFile *pg = fd->data;
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629 if(!pg->iscollection) {
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630 ctx->vfs_errno = ENOTDIR;
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631 return NULL;
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632 }
275
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diff changeset
633
279
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diff changeset
634 VFSDir *dir = pool_malloc(ctx->pool, sizeof(VFSDir));
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diff changeset
635 if(!dir) {
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diff changeset
636 fd->io->close(fd);
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diff changeset
637 ctx->vfs_errno = ENOMEM;
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638 return NULL;
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diff changeset
639 }
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640
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diff changeset
641 PgDir *pgdir = pool_malloc(ctx->pool, sizeof(PgDir));
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642 if(!pgdir) {
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643 fd->io->close(fd);
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644 pool_free(ctx->pool, dir);
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645 ctx->vfs_errno = ENOMEM;
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646 return NULL;
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diff changeset
647 }
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diff changeset
648 memset(pgdir, 0, sizeof(PgDir));
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diff changeset
649 pgdir->file = fd;
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diff changeset
650
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diff changeset
651 dir->ctx = ctx;
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diff changeset
652 dir->io = &pg_vfs_dirio_class;
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diff changeset
653 dir->data = pgdir;
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diff changeset
654 dir->fd = -1;
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diff changeset
655
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656 return dir;
275
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parents:
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657 }
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parents:
diff changeset
658
535004faa1a5 add empty postgresql VFS functions
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659 int pg_vfs_mkdir(VFSContext *ctx, const char *path) {
290
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diff changeset
660 VFS *vfs = ctx->vfs;
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diff changeset
661 PgVFS *pg = vfs->instance;
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662
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diff changeset
663 const char *resname;
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diff changeset
664 int64_t resource_id, parent_id;
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diff changeset
665 resource_id = -1;
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666 parent_id = -1;
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diff changeset
667 WSBool iscollection;
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diff changeset
668 struct stat s;
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diff changeset
669 Oid oid = 0;
305
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diff changeset
670 if(!pg_resolve_path(pg->connection, path, &parent_id, &resource_id, &oid, &resname, &iscollection, &s, &ctx->vfs_errno)) {
290
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diff changeset
671 ctx->vfs_errno = EEXIST;
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diff changeset
672 return 1;
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diff changeset
673 }
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diff changeset
674
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diff changeset
675 if(pg_create_file(ctx, pg, path, NULL, NULL, NULL, NULL, NULL, TRUE)) {
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diff changeset
676 return 1;
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parents: 289
diff changeset
677 }
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parents: 289
diff changeset
678
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diff changeset
679 return 0;
275
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parents:
diff changeset
680 }
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parents:
diff changeset
681
535004faa1a5 add empty postgresql VFS functions
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parents:
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682 int pg_vfs_unlink(VFSContext *ctx, const char *path) {
294
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diff changeset
683 VFS *vfs = ctx->vfs;
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diff changeset
684 PgVFS *pg = vfs->instance;
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diff changeset
685
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diff changeset
686 const char *resname;
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diff changeset
687 int64_t resource_id, parent_id;
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diff changeset
688 resource_id = -1;
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diff changeset
689 parent_id = -1;
277a5896a2ec implement pg unlink
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diff changeset
690 WSBool iscollection;
277a5896a2ec implement pg unlink
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diff changeset
691 Oid oid = 0;
305
4db64fe30588 change pg_resolve_path signature to be useable without VFS
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diff changeset
692 if(pg_resolve_path(pg->connection, path, &parent_id, &resource_id, &oid, &resname, &iscollection, NULL, &ctx->vfs_errno)) {
294
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diff changeset
693 return 1;
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parents: 292
diff changeset
694 }
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parents: 292
diff changeset
695
277a5896a2ec implement pg unlink
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diff changeset
696 if(iscollection) {
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diff changeset
697 ctx->vfs_errno = EISDIR;
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diff changeset
698 return 1;
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parents: 292
diff changeset
699 }
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
700
296
78e92337fa4e implement pg rmdir
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diff changeset
701 return pg_remove_res(ctx, pg, resource_id, oid);
275
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parents:
diff changeset
702 }
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parents:
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703
295
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diff changeset
704 int pg_vfs_rmdir(VFSContext *ctx, const char *path) {
296
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diff changeset
705 VFS *vfs = ctx->vfs;
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diff changeset
706 PgVFS *pg = vfs->instance;
295
73a1243fce15 add pg mkdir tests
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diff changeset
707
296
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diff changeset
708 const char *resname;
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diff changeset
709 int64_t resource_id, parent_id;
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diff changeset
710 resource_id = -1;
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diff changeset
711 parent_id = -1;
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diff changeset
712 WSBool iscollection;
305
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parents: 304
diff changeset
713 if(pg_resolve_path(pg->connection, path, &parent_id, &resource_id, NULL, &resname, &iscollection, NULL, &ctx->vfs_errno)) {
296
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diff changeset
714 return 1;
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diff changeset
715 }
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716
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diff changeset
717 if(!iscollection) {
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diff changeset
718 ctx->vfs_errno = ENOTDIR;
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719 return 1;
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720 }
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diff changeset
721
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diff changeset
722 return pg_remove_res(ctx, pg, resource_id, 0);
275
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723 }
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parents:
diff changeset
724
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
725
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
726 /* -------------------------- VFS_IO functions -------------------------- */
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
727
535004faa1a5 add empty postgresql VFS functions
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diff changeset
728 ssize_t pg_vfs_io_read(SYS_FILE fd, void *buf, size_t nbyte) {
283
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729 PgVFS *pgvfs = fd->ctx->vfs->instance;
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730 PgFile *pg = fd->data;
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731 return lo_read(pgvfs->connection, pg->fd, buf, nbyte);
275
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732 }
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parents:
diff changeset
733
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734 ssize_t pg_vfs_io_write(SYS_FILE fd, const void *buf, size_t nbyte) {
283
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735 PgVFS *pgvfs = fd->ctx->vfs->instance;
284
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736 PgFile *pg = fd->data;
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737 return lo_write(pgvfs->connection, pg->fd, buf, nbyte);
275
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738 }
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parents:
diff changeset
739
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740 ssize_t pg_vfs_io_pread(SYS_FILE fd, void *buf, size_t nbyte, off_t offset) {
283
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741 PgVFS *pgvfs = fd->ctx->vfs->instance;
284
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742 PgFile *pg = fd->data;
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743 if(lo_lseek64(pgvfs->connection, pg->fd, offset, SEEK_SET) == -1) {
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744 return -1;
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745 }
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746 return lo_read(pgvfs->connection, pg->fd, buf, nbyte);
275
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747 }
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parents:
diff changeset
748
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749 ssize_t pg_vfs_io_pwrite(SYS_FILE fd, const void *buf, size_t nbyte, off_t offset) {
283
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750 PgVFS *pgvfs = fd->ctx->vfs->instance;
284
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751 PgFile *pg = fd->data;
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752 if(lo_lseek64(pgvfs->connection, pg->fd, offset, SEEK_SET) == -1) {
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753 return -1;
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754 }
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755 return lo_write(pgvfs->connection, pg->fd, buf, nbyte);
275
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756 }
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parents:
diff changeset
757
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758 off_t pg_vfs_io_seek(SYS_FILE fd, off_t offset, int whence) {
283
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759 PgVFS *pgvfs = fd->ctx->vfs->instance;
284
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760 PgFile *pg = fd->data;
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761 return lo_lseek64(pgvfs->connection, pg->fd, offset, whence);
275
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762 }
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parents:
diff changeset
763
291
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diff changeset
764 off_t pg_vfs_io_tell(SYS_FILE fd) {
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765 PgVFS *pgvfs = fd->ctx->vfs->instance;
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766 PgFile *pg = fd->data;
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diff changeset
767 return lo_tell64(pgvfs->connection, pg->fd);
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768 }
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diff changeset
769
275
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770 void pg_vfs_io_close(SYS_FILE fd) {
282
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771 pool_handle_t *pool = fd->ctx->pool;
292
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772 PgVFS *pgvfs = fd->ctx->vfs->instance;
282
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diff changeset
773 PgFile *pg = fd->data;
275
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774
283
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775 if(pg->fd >= 0) {
292
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diff changeset
776 if((pg->oflags & (O_WRONLY|O_RDWR)) > 0) {
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diff changeset
777 // file modified, update length and lastmodified
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diff changeset
778 off_t len = pg_vfs_io_seek(fd, 0, SEEK_END);
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parents: 291
diff changeset
779 if(len < 0) len = 0;
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diff changeset
780
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diff changeset
781 pg_update_resource(pgvfs, pg->resource_id, len);
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diff changeset
782 }
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diff changeset
783
283
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diff changeset
784 PgVFS *pgvfs = fd->ctx->vfs->instance;
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diff changeset
785 lo_close(pgvfs->connection, pg->fd);
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diff changeset
786 }
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diff changeset
787
282
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diff changeset
788 pool_free(pool, pg);
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diff changeset
789 pool_free(pool, fd);
275
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parents:
diff changeset
790 }
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
791
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
792
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
793 /* -------------------------- VFS_DIRIO functions -------------------------- */
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parents:
diff changeset
794
279
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diff changeset
795 static int load_dir(VFSDir *dir, PgDir *pg) {
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diff changeset
796 VFS *vfs = dir->ctx->vfs;
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diff changeset
797 PgVFS *pgvfs = vfs->instance;
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diff changeset
798 PgFile *pgfd = pg->file->data;
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diff changeset
799 PgDir *pgdir = dir->data;
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diff changeset
800
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diff changeset
801 char resid_param[32];
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diff changeset
802 snprintf(resid_param, 32, "%" PRId64, pgfd->resource_id);
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diff changeset
803
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diff changeset
804 const char *param = resid_param;
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diff changeset
805
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parents: 278
diff changeset
806 PGresult *result = PQexecParams(
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diff changeset
807 pgvfs->connection,
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diff changeset
808 sql_get_children,
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diff changeset
809 1, // number of parameters
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diff changeset
810 NULL,
281
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diff changeset
811 &param, // param: parent resource_id
279
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diff changeset
812 NULL,
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diff changeset
813 NULL,
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diff changeset
814 0); // 0: result in text format
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diff changeset
815 if(!result) return 1;
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diff changeset
816
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diff changeset
817 pgdir->result = result;
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diff changeset
818 pgdir->nrows = PQntuples(result);
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diff changeset
819 return 0;
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diff changeset
820 }
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diff changeset
821
275
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822 int pg_vfs_dirio_readdir(VFS_DIR dir, VFS_ENTRY *entry, int getstat) {
279
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diff changeset
823 PgDir *pg = dir->data;
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diff changeset
824 if(!pg->result) {
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diff changeset
825 if(load_dir(dir, pg)) {
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diff changeset
826 return 0;
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diff changeset
827 }
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diff changeset
828 }
275
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829
279
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diff changeset
830 if(pg->row >= pg->nrows) {
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diff changeset
831 return 0; // EOF
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diff changeset
832 }
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diff changeset
833
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diff changeset
834 entry->name = PQgetvalue(pg->result, pg->row, 1);
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diff changeset
835
282
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diff changeset
836 if(getstat) {
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diff changeset
837 memset(&entry->stat, 0, sizeof(struct stat));
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diff changeset
838
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diff changeset
839 char *iscollection = PQgetvalue(pg->result, pg->row, 2);
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parents: 281
diff changeset
840 char *lastmodified = PQgetvalue(pg->result, pg->row, 3);
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diff changeset
841 char *creationdate = PQgetvalue(pg->result, pg->row, 4);
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diff changeset
842 char *contentlength = PQgetvalue(pg->result, pg->row, 5);
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diff changeset
843 pg_set_stat(&entry->stat, iscollection, lastmodified, creationdate, contentlength);
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844 }
279
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845
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diff changeset
846 pg->row++;
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diff changeset
847 return 1;
275
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parents:
diff changeset
848 }
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parents:
diff changeset
849
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parents:
diff changeset
850 void pg_vfs_dirio_close(VFS_DIR dir) {
280
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diff changeset
851 pool_handle_t *pool = dir->ctx->pool;
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diff changeset
852 PgDir *pg = dir->data;
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diff changeset
853 if(pg->result) {
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854 PQclear(pg->result);
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855 }
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856 PgFile *pgfile = pg->file->data;
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857
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858 pool_free(pool, pgfile);
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859 pool_free(pool, pg->file);
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860 pool_free(pool, pg);
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861 pool_free(pool, dir);
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862 }
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863
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864 time_t pg_convert_timestamp(const char *timestamp) {
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865 struct tm tm;
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866 if(pg_convert_timestamp_tm(timestamp, &tm)) {
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867 return 0;
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868 }
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869 #ifdef __FreeBSD__
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870 return timelocal(&tm);
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871 #else
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872 return mktime(&tparts) - timezone;
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873 #endif
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874 }
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875
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876 int pg_convert_timestamp_tm(const char *timestamp, struct tm *tm) {
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877 // TODO: this is a very basic implementation that needs some work
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878 // format yyyy-mm-dd HH:MM:SS
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879
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880 memset(tm, 0, sizeof(struct tm));
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881 size_t len = timestamp ? strlen(timestamp) : 0;
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882 if(len < 19) {
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883 return 1;
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884 } else if(len > 63) {
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885 return 1;
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886 }
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887
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888 char buf[64];
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889 memcpy(buf, timestamp, len);
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890
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891 char *year_str = buf;
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892 year_str[4] = '\0';
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893
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894 char *month_str = buf + 5;
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895 month_str[2] = '\0';
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896
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897 char *day_str = buf + 8;
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898 day_str[2] = '\0';
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899
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900 char *hour_str = buf + 11;
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901 hour_str[2] = '\0';
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902
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903 char *minute_str = buf + 14;
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904 minute_str[2] = '\0';
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905
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906 char *second_str = buf + 17;
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907 second_str[2] = '\0';
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908
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909 tm->tm_year = atoi(year_str) - 1900;
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910 tm->tm_mon = atoi(month_str) - 1;
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911 tm->tm_mday = atoi(day_str);
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912 tm->tm_hour = atoi(hour_str);
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913 tm->tm_min = atoi(minute_str);
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914 tm->tm_sec = atoi(second_str);
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915
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916 return 0;
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917 }

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