src/libcaptive/client/file.c

   1 /* $Id$
   2  * captive vfs 'file' interface to reactos
   3  * Copyright (C) 2002-2003 Jan Kratochvil <project-captive@jankratochvil.net>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; exactly version 2 of June 1991 is required
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19
  20 #include "config.h"
  21
  22 #include "captive/client-file.h"        /* self */
  23 #include "lib.h"
  24 #include <glib/gmessages.h>
  25 #include "captive/unicode.h"
  26 #include "reactos/ntos/types.h" /* for HANDLE */
  27 #include "reactos/ddk/iotypes.h"        /* for IO_STATUS_BLOCK */
  28 #include "reactos/ddk/iofuncs.h"        /* for IoCreateFile() */
  29 #include "captive/sandbox.h"
  30
  31
  32 static gpointer captive_file_object_parent_class=NULL;
  33
  34
  35 static GnomeVFSResult captive_file_close(CaptiveFileObject *captive_file_object);
  36
  37 static void captive_file_object_finalize(CaptiveFileObject *captive_file_object)
  38 {
  39 GnomeVFSResult errvfsresult;
  40
  41         g_return_if_fail(captive_file_object!=NULL);
  42
  43         errvfsresult=captive_file_close(captive_file_object);
  44         g_assert(errvfsresult==GNOME_VFS_OK);
  45
  46         G_OBJECT_CLASS(captive_file_object_parent_class)->finalize((GObject *)captive_file_object);
  47 }
  48
  49
  50 static void captive_file_object_class_init(CaptiveFileObjectClass *class)
  51 {
  52 GObjectClass *gobject_class=G_OBJECT_CLASS(class);
  53
  54         captive_file_object_parent_class=g_type_class_ref(G_TYPE_OBJECT);
  55         gobject_class->finalize=(void (*)(GObject *object))captive_file_object_finalize;
  56 }
  57
  58
  59 static void captive_file_object_init(CaptiveFileObject *captive_file_object)
  60 {
  61         captive_file_object->file_Handle=NULL;
  62 }
  63
  64
  65 GType captive_file_object_get_type(void)
  66 {
  67 static GType captive_file_object_type=0;
  68
  69         if (!captive_file_object_type) {
  70 static const GTypeInfo captive_file_object_info={
  71                                 sizeof(CaptiveFileObjectClass),
  72                                 NULL,   /* base_init */
  73                                 NULL,   /* base_finalize */
  74                                 (GClassInitFunc)captive_file_object_class_init,
  75                                 NULL,   /* class_finalize */
  76                                 NULL,   /* class_data */
  77                                 sizeof(CaptiveFileObject),
  78                                 5,      /* n_preallocs */
  79                                 (GInstanceInitFunc)captive_file_object_init,
  80                                 };
  81
  82                 captive_file_object_type=g_type_register_static(G_TYPE_OBJECT,
  83                                 "CaptiveFileObject",&captive_file_object_info,0);
  84                 }
  85
  86         return captive_file_object_type;
  87 }
  88
  89
  90 GnomeVFSResult captive_file_new_open
  91                 (CaptiveFileObject **captive_file_object_return,const gchar *pathname,GnomeVFSOpenMode mode)
  92 {
  93 IO_STATUS_BLOCK file_IoStatusBlock;
  94 GnomeVFSResult errvfsresult;
  95 OBJECT_ATTRIBUTES file_ObjectAttributes;
  96 HANDLE file_Handle;
  97 CaptiveFileObject *captive_file_object;
  98 NTSTATUS err;
  99
 100         if (CAPTIVE_IS_SANDBOX_PARENT())
 101                 return captive_sandbox_parent_file_new_open(captive_file_object_return,pathname,mode);
 102
 103         g_return_val_if_fail(captive_file_object_return!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);
 104         g_return_val_if_fail(pathname!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);
 105
 106         *captive_file_object_return=NULL;
 107
 108         errvfsresult=captive_ObjectAttributes_init(pathname,&file_ObjectAttributes);
 109         g_return_val_if_fail(errvfsresult==GNOME_VFS_OK,errvfsresult);
 110
 111         /* open */
 112         err=IoCreateFile(
 113                         &file_Handle,   /* FileHandle */
 114                         0
 115                                         |(!(mode&GNOME_VFS_OPEN_READ ) ? 0 : FILE_READ_DATA)
 116                                         |(!(mode&GNOME_VFS_OPEN_WRITE) ? 0 : FILE_WRITE_DATA | FILE_APPEND_DATA)
 117                                         ,       /* DesiredAccess */
 118                         &file_ObjectAttributes, /* ObjectAttributes */
 119                         &file_IoStatusBlock,    /* IoStatusBlock */
 120                         NULL,   /* AllocationSize; ignored for open */
 121                         FILE_ATTRIBUTE_NORMAL,  /* FileAttributes; ignored for open */
 122                         FILE_SHARE_WRITE,       /* ShareAccess; 0 means exclusive */
 123                         FILE_OPEN,      /* CreateDisposition */
 124                         /* FILE_SYNCHRONOUS_IO_{,NON}ALERT: We need to allow W32 filesystem
 125                                  * any waits to not to let it return STATUS_CANT_WAIT us.
 126                                  * Alertability should have only effect on asynchronous events
 127                                  * from KeWaitForSingleObject() by setting/clearing its parameter 'Alertable'.
 128                                  */
 129                         FILE_SYNCHRONOUS_IO_ALERT,      /* CreateOptions */
 130                         NULL,   /* EaBuffer */
 131                         0,      /* EaLength */
 132                         CreateFileTypeNone,     /* CreateFileType */
 133                         NULL,   /* ExtraCreateParameters */
 134                         0);     /* Options */
 135         g_free(file_ObjectAttributes.ObjectName);       /* left from captive_file_uri_parent_init() */
 136         g_return_val_if_fail(NT_SUCCESS(err)==NT_SUCCESS(file_IoStatusBlock.Status),GNOME_VFS_ERROR_GENERIC);
 137         g_return_val_if_fail(NT_SUCCESS(err),GNOME_VFS_ERROR_GENERIC);
 138         g_return_val_if_fail(file_IoStatusBlock.Information==FILE_OPENED,GNOME_VFS_ERROR_GENERIC);
 139
 140         captive_file_object=g_object_new(
 141                         CAPTIVE_FILE_TYPE_OBJECT,       /* object_type */
 142                         NULL);  /* first_property_name; FIXME: support properties */
 143
 144         captive_file_object->file_Handle=file_Handle;
 145         captive_file_object->offset=0;
 146
 147         *captive_file_object_return=captive_file_object;
 148         return GNOME_VFS_OK;
 149 }
 150
 151
 152 static GnomeVFSResult captive_file_close(CaptiveFileObject *captive_file_object)
 153 {
 154 NTSTATUS err;
 155 HANDLE file_Handle;
 156
 157         if (CAPTIVE_IS_SANDBOX_PARENT())
 158                 return captive_sandbox_parent_file_close(captive_file_object);
 159
 160         g_return_val_if_fail(captive_file_object!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);
 161         g_return_val_if_fail(captive_file_object->file_Handle!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);    /* already closed */
 162
 163         file_Handle=captive_file_object->file_Handle;
 164         captive_file_object->file_Handle=NULL;
 165         err=NtClose(file_Handle);
 166         g_return_val_if_fail(NT_SUCCESS(err),GNOME_VFS_ERROR_GENERIC);
 167
 168         return GNOME_VFS_OK;
 169 }
 170
 171
 172 GnomeVFSResult captive_file_read
 173                 (CaptiveFileObject *captive_file_object,gpointer buffer,GnomeVFSFileSize num_bytes,GnomeVFSFileSize *bytes_read_return)
 174 {
 175 NTSTATUS err;
 176 IO_STATUS_BLOCK file_IoStatusBlock;
 177 LARGE_INTEGER file_offset;
 178
 179         if (CAPTIVE_IS_SANDBOX_PARENT())
 180                 return captive_sandbox_parent_file_read(captive_file_object,buffer,num_bytes,bytes_read_return);
 181
 182         g_return_val_if_fail(captive_file_object!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);
 183         g_return_val_if_fail(captive_file_object->file_Handle!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);
 184         g_return_val_if_fail(buffer!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);
 185         g_return_val_if_fail(bytes_read_return!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);
 186         g_return_val_if_fail(num_bytes==(ULONG)num_bytes,GNOME_VFS_ERROR_BAD_PARAMETERS);
 187
 188         file_offset.QuadPart=captive_file_object->offset;
 189         err=NtReadFile(
 190                         captive_file_object->file_Handle,       /* FileHandle */
 191                         NULL,   /* EventHandle; completion signalling; optional */
 192                         NULL,   /* ApcRoutine; optional */
 193                         NULL,   /* ApcContext; optional */
 194                         &file_IoStatusBlock,    /* IoStatusBlock */
 195                         buffer, /* Buffer */
 196                         num_bytes,      /* Length */
 197                         &file_offset,   /* ByteOffset */
 198                         NULL);  /* Key; NULL means no file locking key */
 199         if (err==STATUS_END_OF_FILE) {
 200                 g_return_val_if_fail(file_IoStatusBlock.Status==STATUS_END_OF_FILE,GNOME_VFS_ERROR_GENERIC);
 201                 g_return_val_if_fail(file_IoStatusBlock.Information==0,GNOME_VFS_ERROR_GENERIC);
 202                 *bytes_read_return=0;
 203                 return GNOME_VFS_ERROR_EOF;
 204                 }
 205         g_return_val_if_fail(NT_SUCCESS(err)==NT_SUCCESS(file_IoStatusBlock.Status),GNOME_VFS_ERROR_GENERIC);
 206         g_return_val_if_fail(NT_SUCCESS(err),GNOME_VFS_ERROR_GENERIC);
 207         g_return_val_if_fail(file_IoStatusBlock.Information<=num_bytes,GNOME_VFS_ERROR_GENERIC);
 208
 209         captive_file_object->offset+=file_IoStatusBlock.Information;
 210         *bytes_read_return=file_IoStatusBlock.Information;
 211         return GNOME_VFS_OK;
 212 }
 213
 214
 215 GnomeVFSResult captive_file_seek
 216                 (CaptiveFileObject *captive_file_object,GnomeVFSSeekPosition whence,GnomeVFSFileOffset offset)
 217 {
 218         if (CAPTIVE_IS_SANDBOX_PARENT())
 219                 return captive_sandbox_parent_file_seek(captive_file_object,whence,offset);
 220
 221         g_return_val_if_fail(captive_file_object!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);
 222         g_return_val_if_fail(captive_file_object->file_Handle!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);
 223
 224         switch (whence) {
 225                 case GNOME_VFS_SEEK_START:
 226                         captive_file_object->offset=offset;
 227                         break;
 228                 case GNOME_VFS_SEEK_CURRENT:
 229                         if (0
 230                                         || (offset>0 && (captive_file_object->offset+offset)<captive_file_object->offset)
 231                                         || (offset<0 && (captive_file_object->offset+offset)>captive_file_object->offset))
 232                                 return GNOME_VFS_ERROR_BAD_PARAMETERS;
 233                         captive_file_object->offset+=offset;
 234                         break;
 235                 case GNOME_VFS_SEEK_END:
 236                         g_assert_not_reached(); /* NOT IMPLEMENTED YET */
 237                         break;
 238                 default:
 239                         g_return_val_if_reached(GNOME_VFS_ERROR_BAD_PARAMETERS);
 240                 }
 241
 242         return GNOME_VFS_OK;
 243 }
 244
 245
 246 GnomeVFSResult captive_file_tell(CaptiveFileObject *captive_file_object,GnomeVFSFileOffset *offset_return)
 247 {
 248         if (CAPTIVE_IS_SANDBOX_PARENT())
 249                 return captive_sandbox_parent_file_tell(captive_file_object,offset_return);
 250
 251         g_return_val_if_fail(captive_file_object!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);
 252         g_return_val_if_fail(captive_file_object->file_Handle!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);
 253         g_return_val_if_fail(offset_return!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);
 254
 255         *offset_return=captive_file_object->offset;
 256         return GNOME_VFS_OK;
 257 }