gio/gfileattribute.c

   1 /* GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright (C) 2006-2007 Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  *
  20  * Author: Alexander Larsson <alexl@redhat.com>
  21  */
  22
  23 #include "config.h"
  24
  25 #include <string.h>
  26
  27 #include "gfileattribute.h"
  28 #include "gfileattribute-priv.h"
  29 #include <glib-object.h>
  30 #include "glibintl.h"
  31
  32
  33 /**
  34  * SECTION:gfileattribute
  35  * @short_description: Key-Value Paired File Attributes
  36  * @include: gio/gio.h
  37  * @see_also: #GFile, #GFileInfo
  38  *
  39  * File attributes in GIO consist of a list of key-value pairs.
  40  *
  41  * Keys are strings that contain a key namespace and a key name, separated
  42  * by a colon, e.g. "namespace:keyname". Namespaces are included to sort
  43  * key-value pairs by namespaces for relevance. Keys can be retrived
  44  * using wildcards, e.g. "standard::*" will return all of the keys in the
  45  * "standard" namespace.
  46  *
  47  * The list of possible attributes for a filesystem (pointed to by a #GFile) is
  48  * available as a #GFileAttributeInfoList. This list is queryable by key names
  49  * as indicated earlier.
  50  *
  51  * Information is stored within the list in #GFileAttributeInfo structures.
  52  * The info structure can store different types, listed in the enum
  53  * #GFileAttributeType. Upon creation of a #GFileAttributeInfo, the type will
  54  * be set to %G_FILE_ATTRIBUTE_TYPE_INVALID.
  55  *
  56  * Classes that implement #GFileIface will create a #GFileAttributeInfoList and
  57  * install default keys and values for their given file system, architecture,
  58  * and other possible implementation details (e.g., on a UNIX system, a file
  59  * attribute key will be registered for the user id for a given file).
  60  *
  61  * <para>
  62  * <table>
  63  * <title>GFileAttributes Default Namespaces</title>
  64  * <tgroup cols='2' align='left'><thead>
  65  * <row><entry>Namspace</entry><entry>Description</entry></row>
  66  * </thead>
  67  * <tbody>
  68  * <row><entry>"standard"</entry><entry>The "Standard" namespace. General file
  69  * information that any application may need should be put in this namespace.
  70  * Examples include the file's name, type, and size.</entry></row>
  71  * <row><entry>"etag"</entry><entry>The <link linkend="gfile-etag">"Entity Tag"</link>
  72  * namespace. Currently, the only key in this namespace is "value", which contains
  73  * the value of the current entity tag.</entry></row>
  74  * <row><entry>"id"</entry><entry>The "Identification" namespace. This
  75  * namespace is used by file managers and applications that list directories
  76  * to check for loops and to uniquely identify files.</entry></row>
  77  * <row><entry>"access"</entry><entry>The "Access" namespace. Used to check
  78  * if a user has the proper privilidges to access files and perform
  79  * file operations. Keys in this namespace are made to be generic
  80  * and easily understood, e.g. the "can_read" key is %TRUE if
  81  * the current user has permission to read the file. UNIX permissions and
  82  * NTFS ACLs in Windows should be mapped to these values.</entry></row>
  83  * <row><entry>"mountable"</entry><entry>The "Mountable" namespace. Includes
  84  * simple boolean keys for checking if a file or path supports mount operations, e.g.
  85  * mount, unmount, eject. These are used for files of type %G_FILE_TYPE_MOUNTABLE.</entry></row>
  86  * <row><entry>"time"</entry><entry>The "Time" namespace. Includes file
  87  * access, changed, created times. </entry></row>
  88  * <row><entry>"unix"</entry><entry>The "Unix" namespace. Includes UNIX-specific
  89  * information and may not be available for all files. Examples include
  90  * the UNIX "UID", "GID", etc.</entry></row>
  91  * <row><entry>"dos"</entry><entry>The "DOS" namespace. Includes DOS-specific
  92  * information and may not be available for all files. Examples include
  93  * "is_system" for checking if a file is marked as a system file, and "is_archive"
  94  * for checking if a file is marked as an archive file.</entry></row>
  95  * <row><entry>"owner"</entry><entry>The "Owner" namespace. Includes information
  96  * about who owns a file. May not be available for all file systems. Examples include
  97  * "user" for getting the user name of the file owner. This information is often mapped from
  98  * some backend specific data such as a unix UID.</entry></row>
  99  * <row><entry>"thumbnail"</entry><entry>The "Thumbnail" namespace. Includes
 100  * information about file thumbnails and their location within the file system. Examples of
 101  * keys in this namespace include "path" to get the location of a thumbnail, and "failed"
 102  * to check if thumbnailing of the file failed.</entry></row>
 103  * <row><entry>"filesystem"</entry><entry>The "Filesystem" namespace. Gets information
 104  * about the file system where a file is located, such as its type, how much
 105  * space is left available, and the overall size of the file system.</entry></row>
 106  * <row><entry>"gvfs"</entry><entry>The "GVFS" namespace. Keys in this namespace
 107  * contain information about the current GVFS backend in use. </entry></row>
 108  * <row><entry>"xattr"</entry><entry>The "xattr" namespace. Gets information
 109  * about extended user attributes. See attr(5). The "user." prefix of the
 110  * extended user attribute name is stripped away when constructing keys in
 111  * this namespace, e.g. "xattr::mime_type" for the extended attribute with
 112  * the name "user.mime_type". Note that this information is only available
 113  * if GLib has been built with extended attribute support.</entry></row>
 114  * <row><entry>"xattr-sys"</entry><entry>The "xattr-sys" namespace.
 115  * Gets information about extended attributes which are not user-specific.
 116  * See attr(5). Note that this information is only available if GLib
 117  * has been built with extended attribute support.</entry></row>
 118  * <row><entry>"selinux"</entry><entry>The "SELinux" namespace. Includes
 119  * information about the SELinux context of files. Note that this information
 120  * is only available if GLib has been built with SELinux support.</entry></row>
 121  * </tbody>
 122  * </tgroup>
 123  * </table>
 124  * </para>
 125  *
 126  * Please note that these are not all of the possible namespaces.
 127  * More namespaces can be added from GIO modules or by individual applications.
 128  * For more information about writing GIO modules, see #GIOModule.
 129  *
 130  * <!-- TODO: Implementation note about using extended attributes on supported
 131  * file systems -->
 132  *
 133  * <para><table>
 134  * <title>GFileAttributes Built-in Keys and Value Types</title>
 135  * <tgroup cols='3' align='left'><thead>
 136  * <row><entry>Enum Value</entry><entry>Namespace:Key</entry><entry>Value Type</entry></row>
 137  * </thead><tbody>
 138  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_TYPE</entry><entry>standard::type</entry><entry>uint32 (#GFileType)</entry></row>
 139  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN</entry><entry>standard::is-hidden</entry><entry>boolean</entry></row>
 140  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_IS_BACKUP</entry><entry>standard::is-backup</entry><entry>boolean</entry></row>
 141  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_IS_SYMLINK</entry><entry>standard::is-symlink</entry><entry>boolean</entry></row>
 142  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_IS_VIRTUAL</entry><entry>standard::is-virtual</entry><entry>boolean</entry></row>
 143  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_NAME</entry><entry>standard::name</entry><entry>byte string</entry></row>
 144  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_DISPLAY_NAME</entry><entry>standard::display-name</entry><entry>string</entry></row>
 145  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_EDIT_NAME</entry><entry>standard::edit-name</entry><entry>string</entry></row>
 146  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_ICON</entry><entry>standard::icon</entry><entry>object (#GIcon)</entry></row>
 147  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE</entry><entry>standard::content-type</entry><entry>string</entry></row>
 148  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_FAST_CONTENT_TYPE</entry><entry>standard::fast-content-type</entry><entry>string</entry></row>
 149  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_SIZE</entry><entry>standard::size</entry><entry>uint64</entry></row>
 150  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_ALLOCATED_SIZE</entry><entry>standard::allocated-size</entry><entry>uint64</entry></row>
 151  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_SYMLINK_TARGET</entry><entry>standard::symlink-target</entry><entry>byte string</entry></row>
 152  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_TARGET_URI</entry><entry>standard::target-uri</entry><entry>string</entry></row>
 153  * <row><entry>%G_FILE_ATTRIBUTE_STANDARD_SORT_ORDER</entry><entry>standard::sort-order</entry><entry>int32</entry></row>
 154  * <row><entry>%G_FILE_ATTRIBUTE_ETAG_VALUE</entry><entry>etag::value</entry><entry>string</entry></row>
 155  * <row><entry>%G_FILE_ATTRIBUTE_ID_FILE</entry><entry>id::file</entry><entry>string</entry></row>
 156  * <row><entry>%G_FILE_ATTRIBUTE_ID_FILESYSTEM</entry><entry>id::filesystem</entry><entry>string</entry></row>
 157  * <row><entry>%G_FILE_ATTRIBUTE_ACCESS_CAN_READ</entry><entry>access::can-read</entry><entry>boolean</entry></row>
 158  * <row><entry>%G_FILE_ATTRIBUTE_ACCESS_CAN_WRITE</entry><entry>access::can-write</entry><entry>boolean</entry></row>
 159  * <row><entry>%G_FILE_ATTRIBUTE_ACCESS_CAN_EXECUTE</entry><entry>access::can-execute</entry><entry>boolean</entry></row>
 160  * <row><entry>%G_FILE_ATTRIBUTE_ACCESS_CAN_DELETE</entry><entry>access::can-delete</entry><entry>boolean</entry></row>
 161  * <row><entry>%G_FILE_ATTRIBUTE_ACCESS_CAN_TRASH</entry><entry>access::can-trash</entry><entry>boolean</entry></row>
 162  * <row><entry>%G_FILE_ATTRIBUTE_ACCESS_CAN_RENAME</entry><entry>access::can-rename</entry><entry>boolean</entry></row>
 163  * <row><entry>%G_FILE_ATTRIBUTE_MOUNTABLE_CAN_MOUNT</entry><entry>mountable::can-mount</entry><entry>boolean</entry></row>
 164  * <row><entry>%G_FILE_ATTRIBUTE_MOUNTABLE_CAN_UNMOUNT</entry><entry>mountable::can-unmount</entry><entry>boolean</entry></row>
 165  * <row><entry>%G_FILE_ATTRIBUTE_MOUNTABLE_CAN_EJECT</entry><entry>mountable::can-eject</entry><entry>boolean</entry></row>
 166  * <row><entry>%G_FILE_ATTRIBUTE_MOUNTABLE_UNIX_DEVICE</entry><entry>mountable::unix-device</entry><entry>uint32</entry></row>
 167  * <row><entry>%G_FILE_ATTRIBUTE_MOUNTABLE_UNIX_DEVICE_FILE</entry><entry>mountable::unix-device-file</entry><entry>string</entry></row>
 168  * <row><entry>%G_FILE_ATTRIBUTE_MOUNTABLE_HAL_UDI</entry><entry>mountable::hal-udi</entry><entry>string</entry></row>
 169  * <row><entry>%G_FILE_ATTRIBUTE_TIME_MODIFIED</entry><entry>time::modified</entry><entry>uint64</entry></row>
 170  * <row><entry>%G_FILE_ATTRIBUTE_TIME_MODIFIED_USEC</entry><entry>time::modified-usec</entry><entry>uint32</entry></row>
 171  * <row><entry>%G_FILE_ATTRIBUTE_TIME_ACCESS</entry><entry>time::access</entry><entry>uint64</entry></row>
 172  * <row><entry>%G_FILE_ATTRIBUTE_TIME_ACCESS_USEC</entry><entry>time::access-usec</entry><entry>uint32</entry></row>
 173  * <row><entry>%G_FILE_ATTRIBUTE_TIME_CHANGED</entry><entry>time::changed</entry><entry>uint64</entry></row>
 174  * <row><entry>%G_FILE_ATTRIBUTE_TIME_CHANGED_USEC</entry><entry>time::changed-usec</entry><entry>uint32</entry></row>
 175  * <row><entry>%G_FILE_ATTRIBUTE_TIME_CREATED</entry><entry>time::created</entry><entry>uint64</entry></row>
 176  * <row><entry>%G_FILE_ATTRIBUTE_TIME_CREATED_USEC</entry><entry>time::created-usec</entry><entry>uint32</entry></row>
 177  * <row><entry>%G_FILE_ATTRIBUTE_UNIX_DEVICE</entry><entry>unix::device</entry><entry>uint32</entry></row>
 178  * <row><entry>%G_FILE_ATTRIBUTE_UNIX_INODE</entry><entry>unix::inode</entry><entry>uint64</entry></row>
 179  * <row><entry>%G_FILE_ATTRIBUTE_UNIX_MODE</entry><entry>unix::mode</entry><entry>uint32</entry></row>
 180  * <row><entry>%G_FILE_ATTRIBUTE_UNIX_NLINK</entry><entry>unix::nlink</entry><entry>uint32</entry></row>
 181  * <row><entry>%G_FILE_ATTRIBUTE_UNIX_UID</entry><entry>unix::uid</entry><entry>uint32</entry></row>
 182  * <row><entry>%G_FILE_ATTRIBUTE_UNIX_GID</entry><entry>unix::gid</entry><entry>uint32</entry></row>
 183  * <row><entry>%G_FILE_ATTRIBUTE_UNIX_RDEV</entry><entry>unix::rdev</entry><entry>uint32</entry></row>
 184  * <row><entry>%G_FILE_ATTRIBUTE_UNIX_BLOCK_SIZE</entry><entry>unix::block-size</entry><entry>uint32</entry></row>
 185  * <row><entry>%G_FILE_ATTRIBUTE_UNIX_BLOCKS</entry><entry>unix::blocks</entry><entry>uint64</entry></row>
 186  * <row><entry>%G_FILE_ATTRIBUTE_UNIX_IS_MOUNTPOINT</entry><entry>unix::is-mountpoint</entry><entry>boolean</entry></row>
 187  * <row><entry>%G_FILE_ATTRIBUTE_DOS_IS_ARCHIVE</entry><entry>dos::is-archive</entry><entry>boolean</entry></row>
 188  * <row><entry>%G_FILE_ATTRIBUTE_DOS_IS_SYSTEM</entry><entry>dos::is-system</entry><entry>boolean</entry></row>
 189  * <row><entry>%G_FILE_ATTRIBUTE_OWNER_USER</entry><entry>owner::user</entry><entry>string</entry></row>
 190  * <row><entry>%G_FILE_ATTRIBUTE_OWNER_USER_REAL</entry><entry>owner::user-real</entry><entry>string</entry></row>
 191  * <row><entry>%G_FILE_ATTRIBUTE_OWNER_GROUP</entry><entry>owner::group</entry><entry>string</entry></row>
 192  * <row><entry>%G_FILE_ATTRIBUTE_THUMBNAIL_PATH</entry><entry>thumbnail::path</entry><entry>bytestring</entry></row>
 193  * <row><entry>%G_FILE_ATTRIBUTE_THUMBNAILING_FAILED</entry><entry>thumbnail::failed</entry><entry>boolean</entry></row>
 194  * <row><entry>%G_FILE_ATTRIBUTE_PREVIEW_ICON</entry><entry>preview::icon</entry><entry>object (#GIcon)</entry></row>
 195  * <row><entry>%G_FILE_ATTRIBUTE_FILESYSTEM_SIZE</entry><entry>filesystem::size</entry><entry>uint64</entry></row>
 196  * <row><entry>%G_FILE_ATTRIBUTE_FILESYSTEM_FREE</entry><entry>filesystem::free</entry><entry>uint64</entry></row>
 197  * <row><entry>%G_FILE_ATTRIBUTE_FILESYSTEM_USED</entry><entry>filesystem::used</entry><entry>uint64</entry></row>
 198  * <row><entry>%G_FILE_ATTRIBUTE_FILESYSTEM_TYPE</entry><entry>filesystem::type</entry><entry>string</entry></row>
 199  * <row><entry>%G_FILE_ATTRIBUTE_FILESYSTEM_READONLY</entry><entry>filesystem::readonly</entry><entry>boolean</entry></row>
 200  * <row><entry>%G_FILE_ATTRIBUTE_GVFS_BACKEND</entry><entry>gvfs::backend</entry><entry>string</entry></row>
 201  * <row><entry>%G_FILE_ATTRIBUTE_SELINUX_CONTEXT</entry><entry>selinux::context</entry><entry>string</entry></row>
 202  * </tbody></tgroup></table></para>
 203  *
 204  * Note that there are no predefined keys in the "xattr" and "xattr-sys"
 205  * namespaces. Keys for the "xattr" namespace are constructed by stripping
 206  * away the "user." prefix from the extended user attribute, and prepending
 207  * "xattr::". Keys for the "xattr-sys" namespace are constructed by
 208  * concatenating "xattr-sys::" with the extended attribute name. All extended
 209  * attribute values are returned as hex-encoded strings in which bytes outside
 210  * the ASCII range are encoded as hexadecimal escape sequences of the form
 211  * \x<replaceable>nn</replaceable>.
 212  **/
 213
 214 /*
 215  * _g_file_attribute_value_free:
 216  * @attr: a #GFileAttributeValue.
 217  *
 218  * Frees the memory used by @attr.
 219  *
 220  **/
 221 void
 222 _g_file_attribute_value_free (GFileAttributeValue *attr)
 223 {
 224   g_return_if_fail (attr != NULL);
 225
 226   _g_file_attribute_value_clear (attr);
 227   g_free (attr);
 228 }
 229
 230 /*
 231  * _g_file_attribute_value_clear:
 232  * @attr: a #GFileAttributeValue.
 233  *
 234  * Clears the value of @attr and sets its type to
 235  * %G_FILE_ATTRIBUTE_TYPE_INVALID.
 236  *
 237  **/
 238 void
 239 _g_file_attribute_value_clear (GFileAttributeValue *attr)
 240 {
 241   g_return_if_fail (attr != NULL);
 242
 243   if (attr->type == G_FILE_ATTRIBUTE_TYPE_STRING ||
 244       attr->type == G_FILE_ATTRIBUTE_TYPE_BYTE_STRING)
 245     g_free (attr->u.string);
 246
 247   if (attr->type == G_FILE_ATTRIBUTE_TYPE_STRINGV)
 248     g_strfreev (attr->u.stringv);
 249
 250   if (attr->type == G_FILE_ATTRIBUTE_TYPE_OBJECT &&
 251       attr->u.obj != NULL)
 252     g_object_unref (attr->u.obj);
 253
 254   attr->type = G_FILE_ATTRIBUTE_TYPE_INVALID;
 255 }
 256
 257 /*
 258  * g_file_attribute_value_set:
 259  * @attr: a #GFileAttributeValue to set the value in.
 260  * @new_value: a #GFileAttributeValue to get the value from.
 261  *
 262  * Sets an attribute's value from another attribute.
 263  **/
 264 void
 265 _g_file_attribute_value_set (GFileAttributeValue        *attr,
 266                              const GFileAttributeValue *new_value)
 267 {
 268   g_return_if_fail (attr != NULL);
 269   g_return_if_fail (new_value != NULL);
 270
 271   _g_file_attribute_value_clear (attr);
 272   *attr = *new_value;
 273
 274   if (attr->type == G_FILE_ATTRIBUTE_TYPE_STRING ||
 275       attr->type == G_FILE_ATTRIBUTE_TYPE_BYTE_STRING)
 276     attr->u.string = g_strdup (attr->u.string);
 277
 278   if (attr->type == G_FILE_ATTRIBUTE_TYPE_STRINGV)
 279     attr->u.stringv = g_strdupv (attr->u.stringv);
 280
 281   if (attr->type == G_FILE_ATTRIBUTE_TYPE_OBJECT &&
 282       attr->u.obj != NULL)
 283     g_object_ref (attr->u.obj);
 284 }
 285
 286 /*
 287  * _g_file_attribute_value_new:
 288  *
 289  * Creates a new file attribute.
 290  *
 291  * Returns: a #GFileAttributeValue.
 292  **/
 293 GFileAttributeValue *
 294 _g_file_attribute_value_new (void)
 295 {
 296   GFileAttributeValue *attr;
 297
 298   attr = g_new (GFileAttributeValue, 1);
 299   attr->type = G_FILE_ATTRIBUTE_TYPE_INVALID;
 300   return attr;
 301 }
 302
 303 gpointer
 304 _g_file_attribute_value_peek_as_pointer (GFileAttributeValue *attr)
 305 {
 306   switch (attr->type) {
 307   case G_FILE_ATTRIBUTE_TYPE_STRING:
 308   case G_FILE_ATTRIBUTE_TYPE_BYTE_STRING:
 309     return attr->u.string;
 310   case G_FILE_ATTRIBUTE_TYPE_STRINGV:
 311     return attr->u.stringv;
 312   case G_FILE_ATTRIBUTE_TYPE_OBJECT:
 313     return attr->u.obj;
 314   default:
 315     return (gpointer) &attr->u;
 316   }
 317 }
 318
 319 /*
 320  * g_file_attribute_value_dup:
 321  * @other: a #GFileAttributeValue to duplicate.
 322  *
 323  * Duplicates a file attribute.
 324  *
 325  * Returns: a duplicate of the @other.
 326  **/
 327 GFileAttributeValue *
 328 _g_file_attribute_value_dup (const GFileAttributeValue *other)
 329 {
 330   GFileAttributeValue *attr;
 331
 332   g_return_val_if_fail (other != NULL, NULL);
 333
 334   attr = g_new (GFileAttributeValue, 1);
 335   attr->type = G_FILE_ATTRIBUTE_TYPE_INVALID;
 336   _g_file_attribute_value_set (attr, other);
 337   return attr;
 338 }
 339
 340 G_DEFINE_BOXED_TYPE (GFileAttributeInfoList, g_file_attribute_info_list,
 341                      g_file_attribute_info_list_dup,
 342                      g_file_attribute_info_list_unref)
 343
 344 static gboolean
 345 valid_char (char c)
 346 {
 347   return c >= 32 && c <= 126 && c != '\\';
 348 }
 349
 350 static char *
 351 escape_byte_string (const char *str)
 352 {
 353   size_t len;
 354   int num_invalid, i;
 355   char *escaped_val, *p;
 356   unsigned char c;
 357   const char hex_digits[] = "0123456789abcdef";
 358
 359   len = strlen (str);
 360
 361   num_invalid = 0;
 362   for (i = 0; i < len; i++)
 363     {
 364       if (!valid_char (str[i]))
 365         num_invalid++;
 366     }
 367
 368   if (num_invalid == 0)
 369     return g_strdup (str);
 370   else
 371     {
 372       escaped_val = g_malloc (len + num_invalid*3 + 1);
 373
 374       p = escaped_val;
 375       for (i = 0; i < len; i++)
 376         {
 377           c = str[i];
 378           if (valid_char (c))
 379             *p++ = c;
 380           else
 381             {
 382               *p++ = '\\';
 383               *p++ = 'x';
 384               *p++ = hex_digits[(c >> 4) & 0xf];
 385               *p++ = hex_digits[c & 0xf];
 386             }
 387         }
 388       *p++ = 0;
 389       return escaped_val;
 390     }
 391 }
 392
 393 /*
 394  * _g_file_attribute_value_as_string:
 395  * @attr: a #GFileAttributeValue.
 396  *
 397  * Converts a #GFileAttributeValue to a string for display.
 398  * The returned string should be freed when no longer needed.
 399  *
 400  * Returns: a string from the @attr, %NULL on error, or "&lt;invalid&gt;"
 401  * if @attr is of type %G_FILE_ATTRIBUTE_TYPE_INVALID.
 402  */
 403 char *
 404 _g_file_attribute_value_as_string (const GFileAttributeValue *attr)
 405 {
 406   GString *s;
 407   int i;
 408   char *str;
 409
 410   g_return_val_if_fail (attr != NULL, NULL);
 411
 412   switch (attr->type)
 413     {
 414     case G_FILE_ATTRIBUTE_TYPE_STRING:
 415       str = g_strdup (attr->u.string);
 416       break;
 417     case G_FILE_ATTRIBUTE_TYPE_STRINGV:
 418       s = g_string_new ("[");
 419       for (i = 0; attr->u.stringv[i] != NULL; i++)
 420         {
 421           g_string_append (s, attr->u.stringv[i]);
 422           if (attr->u.stringv[i+1] != NULL)
 423             g_string_append (s, ", ");
 424         }
 425       g_string_append (s, "]");
 426       str = g_string_free (s, FALSE);
 427       break;
 428     case G_FILE_ATTRIBUTE_TYPE_BYTE_STRING:
 429       str = escape_byte_string (attr->u.string);
 430       break;
 431     case G_FILE_ATTRIBUTE_TYPE_BOOLEAN:
 432       str = g_strdup_printf ("%s", attr->u.boolean?"TRUE":"FALSE");
 433       break;
 434     case G_FILE_ATTRIBUTE_TYPE_UINT32:
 435       str = g_strdup_printf ("%u", (unsigned int)attr->u.uint32);
 436       break;
 437     case G_FILE_ATTRIBUTE_TYPE_INT32:
 438       str = g_strdup_printf ("%i", (int)attr->u.int32);
 439       break;
 440     case G_FILE_ATTRIBUTE_TYPE_UINT64:
 441       str = g_strdup_printf ("%"G_GUINT64_FORMAT, attr->u.uint64);
 442       break;
 443     case G_FILE_ATTRIBUTE_TYPE_INT64:
 444       str = g_strdup_printf ("%"G_GINT64_FORMAT, attr->u.int64);
 445       break;
 446     case G_FILE_ATTRIBUTE_TYPE_OBJECT:
 447       str = g_strdup_printf ("%s:%p", g_type_name_from_instance
 448                                           ((GTypeInstance *) attr->u.obj),
 449                                       attr->u.obj);
 450       break;
 451     case G_FILE_ATTRIBUTE_TYPE_INVALID:
 452       str = g_strdup ("<unset>");
 453       break;
 454     default:
 455       g_warning ("Invalid type in GFileInfo attribute");
 456       str = g_strdup ("<invalid>");
 457       break;
 458     }
 459
 460   return str;
 461 }
 462
 463 /*
 464  * _g_file_attribute_value_get_string:
 465  * @attr: a #GFileAttributeValue.
 466  *
 467  * Gets the string from a file attribute value. If the value is not the
 468  * right type then %NULL will be returned.
 469  *
 470  * Returns: the UTF-8 string value contained within the attribute, or %NULL.
 471  */
 472 const char *
 473 _g_file_attribute_value_get_string (const GFileAttributeValue *attr)
 474 {
 475   if (attr == NULL)
 476     return NULL;
 477
 478   g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_STRING, NULL);
 479
 480   return attr->u.string;
 481 }
 482
 483 /*
 484  * _g_file_attribute_value_get_byte_string:
 485  * @attr: a #GFileAttributeValue.
 486  *
 487  * Gets the byte string from a file attribute value. If the value is not the
 488  * right type then %NULL will be returned.
 489  *
 490  * Returns: the byte string contained within the attribute or %NULL.
 491  */
 492 const char *
 493 _g_file_attribute_value_get_byte_string (const GFileAttributeValue *attr)
 494 {
 495   if (attr == NULL)
 496     return NULL;
 497
 498   g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_BYTE_STRING, NULL);
 499
 500   return attr->u.string;
 501 }
 502
 503 char **
 504 _g_file_attribute_value_get_stringv (const GFileAttributeValue *attr)
 505 {
 506   if (attr == NULL)
 507     return NULL;
 508
 509   g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_STRINGV, NULL);
 510
 511   return attr->u.stringv;
 512 }
 513
 514 /*
 515  * _g_file_attribute_value_get_boolean:
 516  * @attr: a #GFileAttributeValue.
 517  *
 518  * Gets the boolean value from a file attribute value. If the value is not the
 519  * right type then %FALSE will be returned.
 520  *
 521  * Returns: the boolean value contained within the attribute, or %FALSE.
 522  */
 523 gboolean
 524 _g_file_attribute_value_get_boolean (const GFileAttributeValue *attr)
 525 {
 526   if (attr == NULL)
 527     return FALSE;
 528
 529   g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_BOOLEAN, FALSE);
 530
 531   return attr->u.boolean;
 532 }
 533
 534 /*
 535  * _g_file_attribute_value_get_uint32:
 536  * @attr: a #GFileAttributeValue.
 537  *
 538  * Gets the unsigned 32-bit integer from a file attribute value. If the value
 539  * is not the right type then 0 will be returned.
 540  *
 541  * Returns: the unsigned 32-bit integer from the attribute, or 0.
 542  */
 543 guint32
 544 _g_file_attribute_value_get_uint32 (const GFileAttributeValue *attr)
 545 {
 546   if (attr == NULL)
 547     return 0;
 548
 549   g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_UINT32, 0);
 550
 551   return attr->u.uint32;
 552 }
 553
 554 /*
 555  * _g_file_attribute_value_get_int32:
 556  * @attr: a #GFileAttributeValue.
 557  *
 558  * Gets the signed 32-bit integer from a file attribute value. If the value
 559  * is not the right type then 0 will be returned.
 560  *
 561  * Returns: the signed 32-bit integer from the attribute, or 0.
 562  */
 563 gint32
 564 _g_file_attribute_value_get_int32 (const GFileAttributeValue *attr)
 565 {
 566   if (attr == NULL)
 567     return 0;
 568
 569   g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_INT32, 0);
 570
 571   return attr->u.int32;
 572 }
 573
 574 /*
 575  * _g_file_attribute_value_get_uint64:
 576  * @attr: a #GFileAttributeValue.
 577  *
 578  * Gets the unsigned 64-bit integer from a file attribute value. If the value
 579  * is not the right type then 0 will be returned.
 580  *
 581  * Returns: the unsigned 64-bit integer from the attribute, or 0.
 582  */
 583 guint64
 584 _g_file_attribute_value_get_uint64 (const GFileAttributeValue *attr)
 585 {
 586   if (attr == NULL)
 587     return 0;
 588
 589   g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_UINT64, 0);
 590
 591   return attr->u.uint64;
 592 }
 593
 594 /*
 595  * _g_file_attribute_value_get_int64:
 596  * @attr: a #GFileAttributeValue.
 597  *
 598  * Gets the signed 64-bit integer from a file attribute value. If the value
 599  * is not the right type then 0 will be returned.
 600  *
 601  * Returns: the signed 64-bit integer from the attribute, or 0.
 602  */
 603 gint64
 604 _g_file_attribute_value_get_int64 (const GFileAttributeValue *attr)
 605 {
 606   if (attr == NULL)
 607     return 0;
 608
 609   g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_INT64, 0);
 610
 611   return attr->u.int64;
 612 }
 613
 614 /*
 615  * _g_file_attribute_value_get_object:
 616  * @attr: a #GFileAttributeValue.
 617  *
 618  * Gets the GObject from a file attribute value. If the value
 619  * is not the right type then %NULL will be returned.
 620  *
 621  * Returns: the GObject from the attribute, or %NULL.
 622  **/
 623 GObject *
 624 _g_file_attribute_value_get_object (const GFileAttributeValue *attr)
 625 {
 626   if (attr == NULL)
 627     return NULL;
 628
 629   g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_OBJECT, NULL);
 630
 631   return attr->u.obj;
 632 }
 633
 634
 635 void
 636 _g_file_attribute_value_set_from_pointer (GFileAttributeValue *value,
 637                                           GFileAttributeType   type,
 638                                           gpointer             value_p,
 639                                           gboolean             dup)
 640 {
 641   _g_file_attribute_value_clear (value);
 642   value->type = type;
 643   switch (type)
 644     {
 645     case G_FILE_ATTRIBUTE_TYPE_STRING:
 646     case G_FILE_ATTRIBUTE_TYPE_BYTE_STRING:
 647       if (dup)
 648         value->u.string = g_strdup (value_p);
 649       else
 650         value->u.string = value_p;
 651       break;
 652
 653     case G_FILE_ATTRIBUTE_TYPE_STRINGV:
 654       if (dup)
 655         value->u.stringv = g_strdupv (value_p);
 656       else
 657         value->u.stringv = value_p;
 658       break;
 659
 660     case G_FILE_ATTRIBUTE_TYPE_OBJECT:
 661       if (dup)
 662         value->u.obj = g_object_ref (value_p);
 663       else
 664         value->u.obj = value_p;
 665       break;
 666
 667     case G_FILE_ATTRIBUTE_TYPE_BOOLEAN:
 668       value->u.boolean = *(gboolean *)value_p;
 669       break;
 670
 671     case G_FILE_ATTRIBUTE_TYPE_UINT32:
 672       value->u.uint32 = *(guint32 *)value_p;
 673       break;
 674
 675     case G_FILE_ATTRIBUTE_TYPE_INT32:
 676       value->u.int32 = *(gint32 *)value_p;
 677       break;
 678
 679     case G_FILE_ATTRIBUTE_TYPE_UINT64:
 680       value->u.uint64 = *(guint64 *)value_p;
 681       break;
 682
 683     case G_FILE_ATTRIBUTE_TYPE_INT64:
 684       value->u.int64 = *(gint64 *)value_p;
 685       break;
 686
 687     case G_FILE_ATTRIBUTE_TYPE_INVALID:
 688       break;
 689
 690     default:
 691       g_warning ("Unknown type specified in g_file_info_set_attribute\n");
 692       break;
 693     }
 694 }
 695
 696 /*
 697  * _g_file_attribute_value_set_string:
 698  * @attr: a #GFileAttributeValue.
 699  * @string: a UTF-8 string to set within the type.
 700  *
 701  * Sets the attribute value to a given UTF-8 string.
 702  */
 703 void
 704 _g_file_attribute_value_set_string (GFileAttributeValue *attr,
 705                                     const char          *string)
 706 {
 707   g_return_if_fail (attr != NULL);
 708   g_return_if_fail (string != NULL);
 709
 710   _g_file_attribute_value_clear (attr);
 711   attr->type = G_FILE_ATTRIBUTE_TYPE_STRING;
 712   attr->u.string = g_strdup (string);
 713 }
 714
 715 /*
 716  * _g_file_attribute_value_set_byte_string:
 717  * @attr: a #GFileAttributeValue.
 718  * @string: a byte string to set within the type.
 719  *
 720  * Sets the attribute value to a given byte string.
 721  */
 722 void
 723 _g_file_attribute_value_set_byte_string (GFileAttributeValue *attr,
 724                                          const char          *string)
 725 {
 726   g_return_if_fail (attr != NULL);
 727   g_return_if_fail (string != NULL);
 728
 729   _g_file_attribute_value_clear (attr);
 730   attr->type = G_FILE_ATTRIBUTE_TYPE_BYTE_STRING;
 731   attr->u.string = g_strdup (string);
 732 }
 733
 734 void
 735 _g_file_attribute_value_set_stringv (GFileAttributeValue *attr,
 736                                      char               **value)
 737 {
 738   g_return_if_fail (attr != NULL);
 739   g_return_if_fail (value != NULL);
 740
 741   _g_file_attribute_value_clear (attr);
 742   attr->type = G_FILE_ATTRIBUTE_TYPE_STRINGV;
 743   attr->u.stringv = g_strdupv (value);
 744 }
 745
 746
 747 /*
 748  * _g_file_attribute_value_set_boolean:
 749  * @attr: a #GFileAttributeValue.
 750  * @value: a #gboolean to set within the type.
 751  *
 752  * Sets the attribute value to the given boolean value.
 753  */
 754 void
 755 _g_file_attribute_value_set_boolean (GFileAttributeValue *attr,
 756                                      gboolean             value)
 757 {
 758   g_return_if_fail (attr != NULL);
 759
 760   _g_file_attribute_value_clear (attr);
 761   attr->type = G_FILE_ATTRIBUTE_TYPE_BOOLEAN;
 762   attr->u.boolean = !!value;
 763 }
 764
 765 /*
 766  * _g_file_attribute_value_set_uint32:
 767  * @attr: a #GFileAttributeValue.
 768  * @value: a #guint32 to set within the type.
 769  *
 770  * Sets the attribute value to the given unsigned 32-bit integer.
 771  */
 772 void
 773 _g_file_attribute_value_set_uint32 (GFileAttributeValue *attr,
 774                                     guint32              value)
 775 {
 776   g_return_if_fail (attr != NULL);
 777
 778   _g_file_attribute_value_clear (attr);
 779   attr->type = G_FILE_ATTRIBUTE_TYPE_UINT32;
 780   attr->u.uint32 = value;
 781 }
 782
 783 /*
 784  * _g_file_attribute_value_set_int32:
 785  * @attr: a #GFileAttributeValue.
 786  * @value: a #gint32 to set within the type.
 787  *
 788  * Sets the attribute value to the given signed 32-bit integer.
 789  */
 790 void
 791 _g_file_attribute_value_set_int32 (GFileAttributeValue *attr,
 792                                    gint32               value)
 793 {
 794   g_return_if_fail (attr != NULL);
 795
 796   _g_file_attribute_value_clear (attr);
 797   attr->type = G_FILE_ATTRIBUTE_TYPE_INT32;
 798   attr->u.int32 = value;
 799 }
 800
 801 /*
 802  * _g_file_attribute_value_set_uint64:
 803  * @attr: a #GFileAttributeValue.
 804  * @value: a #guint64 to set within the type.
 805  *
 806  * Sets the attribute value to a given unsigned 64-bit integer.
 807  */
 808 void
 809 _g_file_attribute_value_set_uint64 (GFileAttributeValue *attr,
 810                                     guint64              value)
 811 {
 812   g_return_if_fail (attr != NULL);
 813
 814   _g_file_attribute_value_clear (attr);
 815   attr->type = G_FILE_ATTRIBUTE_TYPE_UINT64;
 816   attr->u.uint64 = value;
 817 }
 818
 819 /*
 820  * _g_file_attribute_value_set_int64:
 821  * @attr: a #GFileAttributeValue.
 822  * @value: a #gint64 to set within the type.
 823  *
 824  * Sets the attribute value to a given signed 64-bit integer.
 825  */
 826 void
 827 _g_file_attribute_value_set_int64 (GFileAttributeValue *attr,
 828                                    gint64               value)
 829 {
 830   g_return_if_fail (attr != NULL);
 831
 832   _g_file_attribute_value_clear (attr);
 833   attr->type = G_FILE_ATTRIBUTE_TYPE_INT64;
 834   attr->u.int64 = value;
 835 }
 836
 837 /*
 838  * _g_file_attribute_value_set_object:
 839  * @attr: a #GFileAttributeValue.
 840  * @obj: a #GObject.
 841  *
 842  * Sets the attribute to contain the value @obj.
 843  * The @attr references the GObject internally.
 844  */
 845 void
 846 _g_file_attribute_value_set_object (GFileAttributeValue *attr,
 847                                     GObject             *obj)
 848 {
 849   g_return_if_fail (attr != NULL);
 850   g_return_if_fail (obj != NULL);
 851
 852   _g_file_attribute_value_clear (attr);
 853   attr->type = G_FILE_ATTRIBUTE_TYPE_OBJECT;
 854   attr->u.obj = g_object_ref (obj);
 855 }
 856
 857 typedef struct {
 858   GFileAttributeInfoList public;
 859   GArray *array;
 860   int ref_count;
 861 } GFileAttributeInfoListPriv;
 862
 863 static void
 864 list_update_public (GFileAttributeInfoListPriv *priv)
 865 {
 866   priv->public.infos = (GFileAttributeInfo *)priv->array->data;
 867   priv->public.n_infos = priv->array->len;
 868 }
 869
 870 /**
 871  * g_file_attribute_info_list_new:
 872  *
 873  * Creates a new file attribute info list.
 874  *
 875  * Returns: a #GFileAttributeInfoList.
 876  */
 877 GFileAttributeInfoList *
 878 g_file_attribute_info_list_new (void)
 879 {
 880   GFileAttributeInfoListPriv *priv;
 881
 882   priv = g_new0 (GFileAttributeInfoListPriv, 1);
 883
 884   priv->ref_count = 1;
 885   priv->array = g_array_new (TRUE, FALSE, sizeof (GFileAttributeInfo));
 886
 887   list_update_public (priv);
 888
 889   return (GFileAttributeInfoList *)priv;
 890 }
 891
 892 /**
 893  * g_file_attribute_info_list_dup:
 894  * @list: a #GFileAttributeInfoList to duplicate.
 895  *
 896  * Makes a duplicate of a file attribute info list.
 897  *
 898  * Returns: a copy of the given @list.
 899  */
 900 GFileAttributeInfoList *
 901 g_file_attribute_info_list_dup (GFileAttributeInfoList *list)
 902 {
 903   GFileAttributeInfoListPriv *new;
 904   int i;
 905
 906   g_return_val_if_fail (list != NULL, NULL);
 907
 908   new = g_new0 (GFileAttributeInfoListPriv, 1);
 909   new->ref_count = 1;
 910   new->array = g_array_new (TRUE, FALSE, sizeof (GFileAttributeInfo));
 911
 912   g_array_set_size (new->array, list->n_infos);
 913   list_update_public (new);
 914   for (i = 0; i < list->n_infos; i++)
 915     {
 916       new->public.infos[i].name = g_strdup (list->infos[i].name);
 917       new->public.infos[i].type = list->infos[i].type;
 918       new->public.infos[i].flags = list->infos[i].flags;
 919     }
 920
 921   return (GFileAttributeInfoList *)new;
 922 }
 923
 924 /**
 925  * g_file_attribute_info_list_ref:
 926  * @list: a #GFileAttributeInfoList to reference.
 927  *
 928  * References a file attribute info list.
 929  *
 930  * Returns: #GFileAttributeInfoList or %NULL on error.
 931  */
 932 GFileAttributeInfoList *
 933 g_file_attribute_info_list_ref (GFileAttributeInfoList *list)
 934 {
 935   GFileAttributeInfoListPriv *priv = (GFileAttributeInfoListPriv *)list;
 936
 937   g_return_val_if_fail (list != NULL, NULL);
 938   g_return_val_if_fail (priv->ref_count > 0, NULL);
 939
 940   g_atomic_int_inc (&priv->ref_count);
 941
 942   return list;
 943 }
 944
 945 /**
 946  * g_file_attribute_info_list_unref:
 947  * @list: The #GFileAttributeInfoList to unreference.
 948  *
 949  * Removes a reference from the given @list. If the reference count
 950  * falls to zero, the @list is deleted.
 951  */
 952 void
 953 g_file_attribute_info_list_unref (GFileAttributeInfoList *list)
 954 {
 955   GFileAttributeInfoListPriv *priv = (GFileAttributeInfoListPriv *)list;
 956   int i;
 957
 958   g_return_if_fail (list != NULL);
 959   g_return_if_fail (priv->ref_count > 0);
 960
 961   if (g_atomic_int_dec_and_test (&priv->ref_count))
 962     {
 963       for (i = 0; i < list->n_infos; i++)
 964         g_free (list->infos[i].name);
 965       g_array_free (priv->array, TRUE);
 966     }
 967 }
 968
 969 static int
 970 g_file_attribute_info_list_bsearch (GFileAttributeInfoList *list,
 971                                     const char             *name)
 972 {
 973   int start, end, mid;
 974
 975   start = 0;
 976   end = list->n_infos;
 977
 978   while (start != end)
 979     {
 980       mid = start + (end - start) / 2;
 981
 982       if (strcmp (name, list->infos[mid].name) < 0)
 983         end = mid;
 984       else if (strcmp (name, list->infos[mid].name) > 0)
 985         start = mid + 1;
 986       else
 987         return mid;
 988     }
 989   return start;
 990 }
 991
 992 /**
 993  * g_file_attribute_info_list_lookup:
 994  * @list: a #GFileAttributeInfoList.
 995  * @name: the name of the attribute to lookup.
 996  *
 997  * Gets the file attribute with the name @name from @list.
 998  *
 999  * Returns: a #GFileAttributeInfo for the @name, or %NULL if an
1000  * attribute isn't found.
1001  */
1002 const GFileAttributeInfo *
1003 g_file_attribute_info_list_lookup (GFileAttributeInfoList *list,
1004                                    const char             *name)
1005 {
1006   int i;
1007
1008   g_return_val_if_fail (list != NULL, NULL);
1009   g_return_val_if_fail (name != NULL, NULL);
1010
1011   i = g_file_attribute_info_list_bsearch (list, name);
1012
1013   if (i < list->n_infos && strcmp (list->infos[i].name, name) == 0)
1014     return &list->infos[i];
1015
1016   return NULL;
1017 }
1018
1019 /**
1020  * g_file_attribute_info_list_add:
1021  * @list: a #GFileAttributeInfoList.
1022  * @name: the name of the attribute to add.
1023  * @type: the #GFileAttributeType for the attribute.
1024  * @flags: #GFileAttributeInfoFlags for the attribute.
1025  *
1026  * Adds a new attribute with @name to the @list, setting
1027  * its @type and @flags.
1028  */
1029 void
1030 g_file_attribute_info_list_add (GFileAttributeInfoList *list,
1031                                 const char             *name,
1032                                 GFileAttributeType      type,
1033                                 GFileAttributeInfoFlags flags)
1034 {
1035   GFileAttributeInfoListPriv *priv = (GFileAttributeInfoListPriv *)list;
1036   GFileAttributeInfo info;
1037   int i;
1038
1039   g_return_if_fail (list != NULL);
1040   g_return_if_fail (name != NULL);
1041
1042   i = g_file_attribute_info_list_bsearch (list, name);
1043
1044   if (i < list->n_infos && strcmp (list->infos[i].name, name) == 0)
1045     {
1046       list->infos[i].type = type;
1047       return;
1048     }
1049
1050   info.name = g_strdup (name);
1051   info.type = type;
1052   info.flags = flags;
1053   g_array_insert_vals (priv->array, i, &info, 1);
1054
1055   list_update_public (priv);
1056 }