src/server/plugins/postgresql/vfs.c

Tue, 19 Apr 2022 18:23:54 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Tue, 19 Apr 2022 18:23:54 +0200
branch
webdav
changeset 299
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parent 298
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child 304
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permissions
-rw-r--r--

add empty pg webdav funcs

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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
281
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184 int pg_resolve_path(
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185 VFSContext *ctx,
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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 {
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194 // basic path validation
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195 if(!path) return 1;
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196 size_t pathlen = strlen(path);
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197 if(pathlen == 0) return 1;
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198 if(path[0] != '/') {
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199 return 1;
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200 }
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201
281
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202 char *pathf = NULL;
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203 if(pathlen > 1 && path[pathlen-1] == '/') {
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204 pathf = malloc(pathlen);
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205 memcpy(pathf, path, pathlen);
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206 pathf[pathlen-1] = 0; // remove trailing '/'
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207 path = pathf;
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208 }
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209
278
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210 // get last node of path
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211 *resource_name = util_resource_name(path);
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212
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213 VFS *vfs = ctx->vfs;
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214 PgVFS *pg = vfs->instance;
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215
281
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216 const char *sql = pathlen == 1 ? sql_get_root : sql_resolve_path;
278
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217 PGresult *result = PQexecParams(
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218 pg->connection,
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219 sql,
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220 1, // number of parameters
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221 NULL,
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222 &path, // parameter value
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223 NULL,
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224 NULL,
279
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225 0); // 0: result in text format
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226
281
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227 if(pathf) {
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228 free(pathf);
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229 }
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230
278
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231 if(!result) return 1;
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232
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233 int ret = 1;
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234 //int nfields = PQnfields(result);
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235 int nrows = PQntuples(result);
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236 if(nrows == 1) {
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237 char *resource_id_str = PQgetvalue(result, 0, 0);
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238 char *parent_id_str = PQgetvalue(result, 0, 1);
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239 char *iscol = PQgetvalue(result, 0, 4);
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240 char *lastmodified = PQgetvalue(result, 0, 5);
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241 char *creationdate = PQgetvalue(result, 0, 6);
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242 char *contentlength = PQgetvalue(result, 0, 7);
278
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243 if(resource_id_str && parent_id_str) {
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244 if(util_strtoint(resource_id_str, resource_id)) {
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245 ret = 0; // success
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246 }
279
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247 // optionally get parent_id
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248 util_strtoint(parent_id_str, parent_id);
278
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249 }
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250
283
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251 if(oid) {
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252 char *resoid = PQgetvalue(result, 0, 3);
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253 int64_t roid;
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254 if(resoid && util_strtoint(resoid, &roid)) {
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255 *oid = roid;
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256 }
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257 }
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258
281
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259 if(iscollection && iscol) {
278
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260 *iscollection = iscol[0] == 't' ? TRUE : FALSE;
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261 }
281
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262
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263 if(s) {
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264 pg_set_stat(s, iscol, lastmodified, creationdate, contentlength);
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265 }
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266 } else {
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267 ctx->vfs_errno = ENOENT;
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268 }
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269
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270 PQclear(result);
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271
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272 return ret;
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273 }
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274
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275
282
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276 void pg_set_stat(
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277 struct stat *s,
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278 const char *iscollection,
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279 const char *lastmodified,
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280 const char *creationdate,
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281 const char *contentlength)
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282 {
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283 memset(s, 0, sizeof(struct stat));
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284 if(iscollection) {
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285 WSBool iscol = iscollection[0] == 't' ? TRUE : FALSE;
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286 if(iscol) {
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287 s->st_mode |= 0x4000;
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288 }
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289 }
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290 // TODO: lastmodified, creationdate
283
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291 // set some test values != 0
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292 s->st_mtime = time(NULL);
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293
282
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294 if(contentlength) {
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295 int64_t len;
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296 if(util_strtoint(contentlength, &len)) {
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297 s->st_size = len;
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298 }
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299 }
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300 }
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301
290
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302 static int pg_create_res(
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303 PgVFS *pg,
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304 const char *resparentid_str,
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305 const char *nodename,
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306 int64_t *new_resource_id,
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307 Oid *oid,
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308 const char **resource_name,
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309 struct stat *s)
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310 {
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311 const char* params[2] = { resparentid_str, nodename };
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312 PGresult *result = PQexecParams(
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313 pg->connection,
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314 sql_create_resource,
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315 2, // number of parameters
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316 NULL,
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317 params, // parameter value
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318 NULL,
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319 NULL,
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320 0); // 0: result in text format
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321
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322 if(!result) return 1;
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323
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324 int ret = 1;
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325 if(PQntuples(result) == 1) {
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326 // sql insert succesful
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327 ret = 0;
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328
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329 char *id_str = PQgetvalue(result, 0, 0);
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330 char *oid_str = PQgetvalue(result, 0, 1);
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331 char *lastmodified = PQgetvalue(result, 0, 2);
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332 char *creationdate = PQgetvalue(result, 0, 3);
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333
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334 if(new_resource_id) {
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335 if(!id_str || !util_strtoint(id_str, new_resource_id)) {
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336 ret = 1; // shouldn't happen
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337 log_ereport(LOG_FAILURE, "Postgresql VFS: sql_create_resource: Could not convert resource_id to int");
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338 }
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339 }
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340 if(oid) {
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341 int64_t i;
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342 if(!oid_str || !util_strtoint(oid_str, &i)) {
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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 oid to int");
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345 } else {
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346 *oid = i;
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347 }
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348 }
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349 if(resource_name) {
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350 *resource_name = nodename;
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351 }
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352 if(s) {
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353 pg_set_stat(s, 0, lastmodified, creationdate, NULL);
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354 }
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355 }
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356
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357 PQclear(result);
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358
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359 return ret;
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360 }
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361
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362
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363 static int pg_create_col(
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364 PgVFS *pg,
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365 const char *resparentid_str,
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366 const char *nodename,
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367 int64_t *new_resource_id,
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368 const char **resource_name,
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369 struct stat *s)
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370 {
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371 const char* params[2] = { resparentid_str, nodename };
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372 PGresult *result = PQexecParams(
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373 pg->connection,
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374 sql_create_collection,
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375 2, // number of parameters
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376 NULL,
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377 params, // parameter value
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378 NULL,
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379 NULL,
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380 0); // 0: result in text format
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381
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382 if(!result) return 1;
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383
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384 int ret = 1;
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385 if(PQntuples(result) == 1) {
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386 // sql insert succesful
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387 ret = 0;
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388
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389 char *id_str = PQgetvalue(result, 0, 0);
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390 char *lastmodified = PQgetvalue(result, 0, 1);
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391 char *creationdate = PQgetvalue(result, 0, 2);
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392
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393 if(new_resource_id) {
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394 if(!id_str || !util_strtoint(id_str, new_resource_id)) {
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395 ret = 1; // shouldn't happen
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396 log_ereport(LOG_FAILURE, "Postgresql VFS: sql_create_collection: Could not convert resource_id to int");
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397 }
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398 }
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399 if(resource_name) {
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400 *resource_name = nodename;
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401 }
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402 if(s) {
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403 pg_set_stat(s, 0, lastmodified, creationdate, NULL);
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404 }
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405 }
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406
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407 PQclear(result);
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408
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409 return ret;
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410 }
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411
285
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412 int pg_create_file(
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413 VFSContext *ctx,
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414 PgVFS *pg,
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415 const char *path,
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416 int64_t *new_resource_id,
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417 int64_t *res_parent_id,
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418 Oid *oid,
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419 const char **resource_name,
290
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420 struct stat *s,
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421 WSBool collection)
285
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422 {
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423 char *parent_path = util_parent_path(path);
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424 if(!parent_path) return 1;
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425
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426 const char *nodename = util_resource_name(path);
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427
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428 // resolve the parent path
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429 // if the parent path can't be resolved, we are done
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430 const char *resname;
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431 int64_t resource_id, parent_id;
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432 resource_id = -1;
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433 parent_id = -1;
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434 WSBool iscollection;
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435 Oid unused_oid = 0;
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436
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437 int err = pg_resolve_path(ctx, parent_path, &parent_id, &resource_id, &unused_oid, &resname, &iscollection, NULL);
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438 FREE(parent_path);
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439 if(err) {
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440 return 1;
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441 }
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442
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443 // parent path exists, check if it is a collection
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444 if(!iscollection) {
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445 return 1;
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446 }
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447
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448 // create new Resource
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449 char resid_str[32];
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450 snprintf(resid_str, 32, "%" PRId64, resource_id); // convert parent resource_id to string
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451
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452 int ret;
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453 if(collection) {
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454 ret = pg_create_col(pg, resid_str, nodename, new_resource_id, resource_name, s);
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455 } else {
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456 ret = pg_create_res(pg, resid_str, nodename, new_resource_id, oid, resource_name, s);
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457 }
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458
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459 if(res_parent_id) {
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460 // resource_id is still the id of the parent from previous pg_resolve_path call
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461 *res_parent_id = resource_id;
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462 }
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463
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464 return ret;
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465 }
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466
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467 int pg_remove_res(
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468 VFSContext *ctx,
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469 PgVFS *pg,
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470 int64_t resource_id,
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471 Oid oid)
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472 {
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473 // create transaction savepoint
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474 PGresult *result = PQexec(pg->connection, "savepoint del_res;");
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475 ExecStatusType execStatus = PQresultStatus(result);
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476 PQclear(result);
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477 if(execStatus != PGRES_COMMAND_OK) {
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478 return 1;
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479 }
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480
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481 if(oid > 0) {
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482 if(lo_unlink(pg->connection, oid) != 1) {
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483 // restore savepoint
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484 result = PQexec(pg->connection, "rollback to savepoint del_res;");
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485 PQclear(result);
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486 return 1; // error
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487 }
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488 }
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489
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490 char resid_str[32];
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491 snprintf(resid_str, 32, "%" PRId64, resource_id);
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492
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493 const char* params[1] = { resid_str };
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494 result = PQexecParams(
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495 pg->connection,
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496 sql_delete_res,
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497 1, // number of parameters
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498 NULL,
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499 params, // parameter value
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500 NULL,
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501 NULL,
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502 0); // 0: result in text format
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503
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504 execStatus = PQresultStatus(result);
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505 PQclear(result);
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506 int ret = 0;
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507
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508 if(execStatus != PGRES_COMMAND_OK) {
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509 ret = 1;
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510 // restore savepoint
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511 result = PQexec(pg->connection, "rollback to savepoint del_res;");
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512 PQclear(result);
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513 } else {
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514 // we don't need the savepoint anymore
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515 result = PQexec(pg->connection, "release savepoint del_res;");
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516 PQclear(result);
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517 }
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518
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519 return ret;
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520 }
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521
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522 int pg_update_resource(PgVFS *pg, int64_t resource_id, int64_t contentlength) {
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523 char resid_str[32];
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524 char ctlen_str[32];
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525 snprintf(resid_str, 32, "%" PRId64, resource_id);
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526 snprintf(ctlen_str, 32, "%" PRId64, contentlength);
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527
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528 const char* params[2] = { resid_str, ctlen_str };
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529 PGresult *result = PQexecParams(
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530 pg->connection,
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531 sql_update_resource,
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532 2, // number of parameters
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533 NULL,
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534 params, // parameter value
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535 NULL,
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536 NULL,
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537 0); // 0: result in text format
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538
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539 int ret = PQresultStatus(result) == PGRES_COMMAND_OK ? 0 : 1;
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540 PQclear(result);
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541 return ret;
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542 }
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543
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544 /* -------------------------- VFS functions -------------------------- */
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545
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546 SYS_FILE pg_vfs_open(VFSContext *ctx, const char *path, int oflags) {
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547 VFS *vfs = ctx->vfs;
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548 PgVFS *pg = vfs->instance;
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549
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550 const char *resname;
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551 int64_t resource_id, parent_id;
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552 resource_id = -1;
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553 parent_id = -1;
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554 WSBool iscollection;
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555 struct stat s;
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556 Oid oid = 0;
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557 if(pg_resolve_path(ctx, path, &parent_id, &resource_id, &oid, &resname, &iscollection, &s)) {
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558 if((oflags & O_CREAT) == O_CREAT) {
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559 if(pg_create_file(ctx, pg, path, &resource_id, &parent_id, &oid, &resname, &s, FALSE)) {
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560 return NULL;
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561 }
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562 iscollection = 0;
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563 } else {
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564 return NULL;
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565 }
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566 }
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567
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568 VFSFile *file = pool_malloc(ctx->pool, sizeof(VFSFile));
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569 if(!file) {
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570 return NULL;
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571 }
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572 PgFile *pgfile = pool_malloc(ctx->pool, sizeof(PgFile));
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573 if(!pgfile) {
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574 pool_free(ctx->pool, file);
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575 return NULL;
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576 }
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577
283
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578 int fd = -1;
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579 if(!iscollection) {
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580 if (PQstatus(pg->connection) != CONNECTION_OK) {
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581 fd = -2;
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582 }
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583
289
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584 int lo_mode = INV_READ;
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585 if((oflags & O_RDWR) == O_RDWR) {
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diff changeset
586 lo_mode = INV_READ|INV_WRITE;
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diff changeset
587 } else if((oflags & O_WRONLY) == O_WRONLY) {
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diff changeset
588 lo_mode = INV_WRITE;
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589 }
283
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diff changeset
590 fd = lo_open(pg->connection, oid, lo_mode);
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591 }
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diff changeset
592
278
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diff changeset
593 pgfile->iscollection = iscollection;
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594 pgfile->resource_id = resource_id;
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595 pgfile->parent_id = parent_id;
283
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596 pgfile->oid = oid;
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597 pgfile->fd = fd;
292
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diff changeset
598 pgfile->oflags = oflags;
281
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599 pgfile->s = s;
278
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600
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601 file->ctx = ctx;
281
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602 file->io = iscollection ? &pg_vfs_io_class : &pg_vfs_io_class;
278
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diff changeset
603 file->fd = -1;
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diff changeset
604 file->data = pgfile;
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605
38bf7b42b58c implement pg_vfs_open
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606 return file;
275
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607 }
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parents:
diff changeset
608
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609 int pg_vfs_stat(VFSContext *ctx, const char *path, struct stat *buf) {
281
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610 int64_t parent_id, resource_id;
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611 const char *resname;
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612 WSBool iscollection;
283
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613 return pg_resolve_path(ctx, path, &parent_id, &resource_id, NULL, &resname, &iscollection, buf);
275
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parents:
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614 }
535004faa1a5 add empty postgresql VFS functions
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parents:
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615
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616 int pg_vfs_fstat(VFSContext *ctx, SYS_FILE fd, struct stat *buf) {
281
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617 PgFile *pgfile = fd->data;
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diff changeset
618 memcpy(buf, &pgfile->s, sizeof(struct stat));
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619 return 0;
275
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620 }
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parents:
diff changeset
621
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622 VFS_DIR pg_vfs_opendir(VFSContext *ctx, const char *path) {
279
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623 VFSFile *file = pg_vfs_open(ctx, path, O_RDONLY);
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624 if(!file) return NULL;
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625 return pg_vfs_fdopendir(ctx, file);
275
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626 }
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parents:
diff changeset
627
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628 VFS_DIR pg_vfs_fdopendir(VFSContext *ctx, SYS_FILE fd) {
279
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629 PgFile *pg = fd->data;
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630 if(!pg->iscollection) {
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631 ctx->vfs_errno = ENOTDIR;
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632 return NULL;
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633 }
275
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634
279
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diff changeset
635 VFSDir *dir = pool_malloc(ctx->pool, sizeof(VFSDir));
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636 if(!dir) {
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637 fd->io->close(fd);
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638 ctx->vfs_errno = ENOMEM;
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639 return NULL;
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diff changeset
640 }
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diff changeset
641
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diff changeset
642 PgDir *pgdir = pool_malloc(ctx->pool, sizeof(PgDir));
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643 if(!pgdir) {
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644 fd->io->close(fd);
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645 pool_free(ctx->pool, dir);
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646 ctx->vfs_errno = ENOMEM;
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647 return NULL;
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648 }
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649 memset(pgdir, 0, sizeof(PgDir));
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650 pgdir->file = fd;
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651
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652 dir->ctx = ctx;
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653 dir->io = &pg_vfs_dirio_class;
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654 dir->data = pgdir;
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655 dir->fd = -1;
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diff changeset
656
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657 return dir;
275
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658 }
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parents:
diff changeset
659
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660 int pg_vfs_mkdir(VFSContext *ctx, const char *path) {
290
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diff changeset
661 VFS *vfs = ctx->vfs;
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662 PgVFS *pg = vfs->instance;
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663
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diff changeset
664 const char *resname;
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665 int64_t resource_id, parent_id;
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diff changeset
666 resource_id = -1;
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667 parent_id = -1;
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diff changeset
668 WSBool iscollection;
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diff changeset
669 struct stat s;
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670 Oid oid = 0;
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diff changeset
671 if(!pg_resolve_path(ctx, path, &parent_id, &resource_id, &oid, &resname, &iscollection, &s)) {
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diff changeset
672 ctx->vfs_errno = EEXIST;
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673 return 1;
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diff changeset
674 }
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diff changeset
675
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diff changeset
676 if(pg_create_file(ctx, pg, path, NULL, NULL, NULL, NULL, NULL, TRUE)) {
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677 return 1;
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diff changeset
678 }
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diff changeset
679
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diff changeset
680 return 0;
275
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parents:
diff changeset
681 }
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parents:
diff changeset
682
535004faa1a5 add empty postgresql VFS functions
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parents:
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683 int pg_vfs_unlink(VFSContext *ctx, const char *path) {
294
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diff changeset
684 VFS *vfs = ctx->vfs;
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diff changeset
685 PgVFS *pg = vfs->instance;
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diff changeset
686
277a5896a2ec implement pg unlink
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diff changeset
687 const char *resname;
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diff changeset
688 int64_t resource_id, parent_id;
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diff changeset
689 resource_id = -1;
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diff changeset
690 parent_id = -1;
277a5896a2ec implement pg unlink
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diff changeset
691 WSBool iscollection;
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
692 Oid oid = 0;
277a5896a2ec implement pg unlink
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diff changeset
693 if(pg_resolve_path(ctx, path, &parent_id, &resource_id, &oid, &resname, &iscollection, NULL)) {
277a5896a2ec implement pg unlink
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diff changeset
694 ctx->vfs_errno = ENOENT;
277a5896a2ec implement pg unlink
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diff changeset
695 return 1;
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
696 }
277a5896a2ec implement pg unlink
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 292
diff changeset
697
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
698 if(iscollection) {
277a5896a2ec implement pg unlink
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diff changeset
699 ctx->vfs_errno = EISDIR;
277a5896a2ec implement pg unlink
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diff changeset
700 return 1;
277a5896a2ec implement pg unlink
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parents: 292
diff changeset
701 }
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parents: 292
diff changeset
702
296
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diff changeset
703 return pg_remove_res(ctx, pg, resource_id, oid);
275
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parents:
diff changeset
704 }
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parents:
diff changeset
705
295
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diff changeset
706 int pg_vfs_rmdir(VFSContext *ctx, const char *path) {
296
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parents: 295
diff changeset
707 VFS *vfs = ctx->vfs;
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diff changeset
708 PgVFS *pg = vfs->instance;
295
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diff changeset
709
296
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diff changeset
710 const char *resname;
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diff changeset
711 int64_t resource_id, parent_id;
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diff changeset
712 resource_id = -1;
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diff changeset
713 parent_id = -1;
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diff changeset
714 WSBool iscollection;
78e92337fa4e implement pg rmdir
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diff changeset
715 if(pg_resolve_path(ctx, path, &parent_id, &resource_id, NULL, &resname, &iscollection, NULL)) {
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diff changeset
716 ctx->vfs_errno = ENOENT;
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diff changeset
717 return 1;
78e92337fa4e implement pg rmdir
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diff changeset
718 }
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diff changeset
719
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720 if(!iscollection) {
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721 ctx->vfs_errno = ENOTDIR;
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diff changeset
722 return 1;
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diff changeset
723 }
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diff changeset
724
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diff changeset
725 return pg_remove_res(ctx, pg, resource_id, 0);
275
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parents:
diff changeset
726 }
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parents:
diff changeset
727
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
728
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
729 /* -------------------------- VFS_IO functions -------------------------- */
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
730
535004faa1a5 add empty postgresql VFS functions
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731 ssize_t pg_vfs_io_read(SYS_FILE fd, void *buf, size_t nbyte) {
283
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732 PgVFS *pgvfs = fd->ctx->vfs->instance;
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diff changeset
733 PgFile *pg = fd->data;
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734 return lo_read(pgvfs->connection, pg->fd, buf, nbyte);
275
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735 }
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parents:
diff changeset
736
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737 ssize_t pg_vfs_io_write(SYS_FILE fd, const void *buf, size_t nbyte) {
283
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738 PgVFS *pgvfs = fd->ctx->vfs->instance;
284
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739 PgFile *pg = fd->data;
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diff changeset
740 return lo_write(pgvfs->connection, pg->fd, buf, nbyte);
275
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741 }
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parents:
diff changeset
742
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743 ssize_t pg_vfs_io_pread(SYS_FILE fd, void *buf, size_t nbyte, off_t offset) {
283
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744 PgVFS *pgvfs = fd->ctx->vfs->instance;
284
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745 PgFile *pg = fd->data;
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746 if(lo_lseek64(pgvfs->connection, pg->fd, offset, SEEK_SET) == -1) {
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747 return -1;
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diff changeset
748 }
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diff changeset
749 return lo_read(pgvfs->connection, pg->fd, buf, nbyte);
275
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diff changeset
750 }
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parents:
diff changeset
751
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752 ssize_t pg_vfs_io_pwrite(SYS_FILE fd, const void *buf, size_t nbyte, off_t offset) {
283
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753 PgVFS *pgvfs = fd->ctx->vfs->instance;
284
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754 PgFile *pg = fd->data;
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755 if(lo_lseek64(pgvfs->connection, pg->fd, offset, SEEK_SET) == -1) {
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756 return -1;
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diff changeset
757 }
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758 return lo_write(pgvfs->connection, pg->fd, buf, nbyte);
275
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759 }
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parents:
diff changeset
760
535004faa1a5 add empty postgresql VFS functions
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parents:
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761 off_t pg_vfs_io_seek(SYS_FILE fd, off_t offset, int whence) {
283
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diff changeset
762 PgVFS *pgvfs = fd->ctx->vfs->instance;
284
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diff changeset
763 PgFile *pg = fd->data;
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diff changeset
764 return lo_lseek64(pgvfs->connection, pg->fd, offset, whence);
275
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parents:
diff changeset
765 }
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parents:
diff changeset
766
291
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diff changeset
767 off_t pg_vfs_io_tell(SYS_FILE fd) {
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diff changeset
768 PgVFS *pgvfs = fd->ctx->vfs->instance;
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diff changeset
769 PgFile *pg = fd->data;
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diff changeset
770 return lo_tell64(pgvfs->connection, pg->fd);
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diff changeset
771 }
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diff changeset
772
275
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773 void pg_vfs_io_close(SYS_FILE fd) {
282
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diff changeset
774 pool_handle_t *pool = fd->ctx->pool;
292
7c31bcd5b4be update pg resource metadata on close
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diff changeset
775 PgVFS *pgvfs = fd->ctx->vfs->instance;
282
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diff changeset
776 PgFile *pg = fd->data;
275
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777
283
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diff changeset
778 if(pg->fd >= 0) {
292
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diff changeset
779 if((pg->oflags & (O_WRONLY|O_RDWR)) > 0) {
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parents: 291
diff changeset
780 // file modified, update length and lastmodified
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diff changeset
781 off_t len = pg_vfs_io_seek(fd, 0, SEEK_END);
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diff changeset
782 if(len < 0) len = 0;
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diff changeset
783
7c31bcd5b4be update pg resource metadata on close
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diff changeset
784 pg_update_resource(pgvfs, pg->resource_id, len);
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diff changeset
785 }
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parents: 291
diff changeset
786
283
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diff changeset
787 PgVFS *pgvfs = fd->ctx->vfs->instance;
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diff changeset
788 lo_close(pgvfs->connection, pg->fd);
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diff changeset
789 }
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diff changeset
790
282
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diff changeset
791 pool_free(pool, pg);
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diff changeset
792 pool_free(pool, fd);
275
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parents:
diff changeset
793 }
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
794
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
795
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
796 /* -------------------------- VFS_DIRIO functions -------------------------- */
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
797
279
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diff changeset
798 static int load_dir(VFSDir *dir, PgDir *pg) {
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parents: 278
diff changeset
799 VFS *vfs = dir->ctx->vfs;
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diff changeset
800 PgVFS *pgvfs = vfs->instance;
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diff changeset
801 PgFile *pgfd = pg->file->data;
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parents: 278
diff changeset
802 PgDir *pgdir = dir->data;
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diff changeset
803
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parents: 278
diff changeset
804 char resid_param[32];
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diff changeset
805 snprintf(resid_param, 32, "%" PRId64, pgfd->resource_id);
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parents: 278
diff changeset
806
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parents: 278
diff changeset
807 const char *param = resid_param;
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diff changeset
808
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parents: 278
diff changeset
809 PGresult *result = PQexecParams(
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diff changeset
810 pgvfs->connection,
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diff changeset
811 sql_get_children,
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parents: 278
diff changeset
812 1, // number of parameters
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diff changeset
813 NULL,
281
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diff changeset
814 &param, // param: parent resource_id
279
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diff changeset
815 NULL,
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diff changeset
816 NULL,
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diff changeset
817 0); // 0: result in text format
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parents: 278
diff changeset
818 if(!result) return 1;
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diff changeset
819
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diff changeset
820 pgdir->result = result;
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diff changeset
821 pgdir->nrows = PQntuples(result);
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diff changeset
822 return 0;
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diff changeset
823 }
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diff changeset
824
275
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parents:
diff changeset
825 int pg_vfs_dirio_readdir(VFS_DIR dir, VFS_ENTRY *entry, int getstat) {
279
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diff changeset
826 PgDir *pg = dir->data;
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diff changeset
827 if(!pg->result) {
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diff changeset
828 if(load_dir(dir, pg)) {
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diff changeset
829 return 0;
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diff changeset
830 }
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diff changeset
831 }
275
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832
279
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diff changeset
833 if(pg->row >= pg->nrows) {
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diff changeset
834 return 0; // EOF
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diff changeset
835 }
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diff changeset
836
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diff changeset
837 entry->name = PQgetvalue(pg->result, pg->row, 1);
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diff changeset
838
282
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diff changeset
839 if(getstat) {
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diff changeset
840 memset(&entry->stat, 0, sizeof(struct stat));
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diff changeset
841
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diff changeset
842 char *iscollection = PQgetvalue(pg->result, pg->row, 2);
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parents: 281
diff changeset
843 char *lastmodified = PQgetvalue(pg->result, pg->row, 3);
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parents: 281
diff changeset
844 char *creationdate = PQgetvalue(pg->result, pg->row, 4);
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parents: 281
diff changeset
845 char *contentlength = PQgetvalue(pg->result, pg->row, 5);
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parents: 281
diff changeset
846 pg_set_stat(&entry->stat, iscollection, lastmodified, creationdate, contentlength);
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diff changeset
847 }
279
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diff changeset
848
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diff changeset
849 pg->row++;
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diff changeset
850 return 1;
275
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parents:
diff changeset
851 }
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
852
535004faa1a5 add empty postgresql VFS functions
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parents:
diff changeset
853 void pg_vfs_dirio_close(VFS_DIR dir) {
280
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diff changeset
854 pool_handle_t *pool = dir->ctx->pool;
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diff changeset
855 PgDir *pg = dir->data;
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diff changeset
856 if(pg->result) {
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diff changeset
857 PQclear(pg->result);
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858 }
d0d5a970292f implement pg_vfs_dirio_close
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 279
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859 PgFile *pgfile = pg->file->data;
275
535004faa1a5 add empty postgresql VFS functions
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
860
280
d0d5a970292f implement pg_vfs_dirio_close
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 279
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861 pool_free(pool, pgfile);
d0d5a970292f implement pg_vfs_dirio_close
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 279
diff changeset
862 pool_free(pool, pg->file);
d0d5a970292f implement pg_vfs_dirio_close
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 279
diff changeset
863 pool_free(pool, pg);
d0d5a970292f implement pg_vfs_dirio_close
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 279
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864 pool_free(pool, dir);
275
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
865 }

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