| /* GIO - GLib Input, Output and Streaming Library |
| * |
| * Copyright (C) 2006-2007 Red Hat, Inc. |
| * |
| * SPDX-License-Identifier: LGPL-2.1-or-later |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General |
| * Public License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| * |
| * Author: Alexander Larsson <alexl@redhat.com> |
| */ |
| |
| #include "config.h" |
| |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| |
| #include <glib.h> |
| #include <glib/gstdio.h> |
| #include "gcancellable.h" |
| #include "gioerror.h" |
| #include "glocalfileinputstream.h" |
| #include "glocalfileinfo.h" |
| #include "glibintl.h" |
| |
| #ifdef G_OS_UNIX |
| #include <unistd.h> |
| #include "glib-unix.h" |
| #include "gfiledescriptorbased.h" |
| #endif |
| |
| #ifdef G_OS_WIN32 |
| #include <io.h> |
| #endif |
| |
| struct _GLocalFileInputStreamPrivate { |
| int fd; |
| guint do_close : 1; |
| }; |
| |
| #ifdef G_OS_UNIX |
| static void g_file_descriptor_based_iface_init (GFileDescriptorBasedIface *iface); |
| #endif |
| |
| #define g_local_file_input_stream_get_type _g_local_file_input_stream_get_type |
| #ifdef G_OS_UNIX |
| G_DEFINE_TYPE_WITH_CODE (GLocalFileInputStream, g_local_file_input_stream, G_TYPE_FILE_INPUT_STREAM, |
| G_ADD_PRIVATE (GLocalFileInputStream) |
| G_IMPLEMENT_INTERFACE (G_TYPE_FILE_DESCRIPTOR_BASED, |
| g_file_descriptor_based_iface_init)) |
| #else |
| G_DEFINE_TYPE_WITH_CODE (GLocalFileInputStream, g_local_file_input_stream, G_TYPE_FILE_INPUT_STREAM, |
| G_ADD_PRIVATE (GLocalFileInputStream)) |
| #endif |
| |
| static gssize g_local_file_input_stream_read (GInputStream *stream, |
| void *buffer, |
| gsize count, |
| GCancellable *cancellable, |
| GError **error); |
| static gboolean g_local_file_input_stream_close (GInputStream *stream, |
| GCancellable *cancellable, |
| GError **error); |
| static goffset g_local_file_input_stream_tell (GFileInputStream *stream); |
| static gboolean g_local_file_input_stream_can_seek (GFileInputStream *stream); |
| static gboolean g_local_file_input_stream_seek (GFileInputStream *stream, |
| goffset offset, |
| GSeekType type, |
| GCancellable *cancellable, |
| GError **error); |
| static GFileInfo *g_local_file_input_stream_query_info (GFileInputStream *stream, |
| const char *attributes, |
| GCancellable *cancellable, |
| GError **error); |
| #ifdef G_OS_UNIX |
| static int g_local_file_input_stream_get_fd (GFileDescriptorBased *stream); |
| #endif |
| |
| void |
| _g_local_file_input_stream_set_do_close (GLocalFileInputStream *in, |
| gboolean do_close) |
| { |
| in->priv->do_close = do_close; |
| } |
| |
| static void |
| g_local_file_input_stream_class_init (GLocalFileInputStreamClass *klass) |
| { |
| GInputStreamClass *stream_class = G_INPUT_STREAM_CLASS (klass); |
| GFileInputStreamClass *file_stream_class = G_FILE_INPUT_STREAM_CLASS (klass); |
| |
| stream_class->read_fn = g_local_file_input_stream_read; |
| stream_class->close_fn = g_local_file_input_stream_close; |
| file_stream_class->tell = g_local_file_input_stream_tell; |
| file_stream_class->can_seek = g_local_file_input_stream_can_seek; |
| file_stream_class->seek = g_local_file_input_stream_seek; |
| file_stream_class->query_info = g_local_file_input_stream_query_info; |
| } |
| |
| #ifdef G_OS_UNIX |
| static void |
| g_file_descriptor_based_iface_init (GFileDescriptorBasedIface *iface) |
| { |
| iface->get_fd = g_local_file_input_stream_get_fd; |
| } |
| #endif |
| |
| static void |
| g_local_file_input_stream_init (GLocalFileInputStream *info) |
| { |
| info->priv = g_local_file_input_stream_get_instance_private (info); |
| info->priv->do_close = TRUE; |
| } |
| |
| GFileInputStream * |
| _g_local_file_input_stream_new (int fd) |
| { |
| GLocalFileInputStream *stream; |
| |
| stream = g_object_new (G_TYPE_LOCAL_FILE_INPUT_STREAM, NULL); |
| stream->priv->fd = fd; |
| |
| return G_FILE_INPUT_STREAM (stream); |
| } |
| |
| static gssize |
| g_local_file_input_stream_read (GInputStream *stream, |
| void *buffer, |
| gsize count, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| GLocalFileInputStream *file; |
| gssize res; |
| |
| file = G_LOCAL_FILE_INPUT_STREAM (stream); |
| |
| res = -1; |
| while (1) |
| { |
| if (g_cancellable_set_error_if_cancelled (cancellable, error)) |
| break; |
| res = read (file->priv->fd, buffer, count); |
| if (res == -1) |
| { |
| int errsv = errno; |
| |
| if (errsv == EINTR) |
| continue; |
| |
| g_set_error (error, G_IO_ERROR, |
| g_io_error_from_errno (errsv), |
| _("Error reading from file: %s"), |
| g_strerror (errsv)); |
| } |
| |
| break; |
| } |
| |
| return res; |
| } |
| |
| static gboolean |
| g_local_file_input_stream_close (GInputStream *stream, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| GLocalFileInputStream *file; |
| |
| file = G_LOCAL_FILE_INPUT_STREAM (stream); |
| |
| if (!file->priv->do_close) |
| return TRUE; |
| |
| if (file->priv->fd == -1) |
| return TRUE; |
| |
| if (!g_close (file->priv->fd, NULL)) |
| { |
| int errsv = errno; |
| |
| g_set_error (error, G_IO_ERROR, |
| g_io_error_from_errno (errsv), |
| _("Error closing file: %s"), |
| g_strerror (errsv)); |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| |
| static goffset |
| g_local_file_input_stream_tell (GFileInputStream *stream) |
| { |
| GLocalFileInputStream *file; |
| off_t pos; |
| |
| file = G_LOCAL_FILE_INPUT_STREAM (stream); |
| |
| pos = lseek (file->priv->fd, 0, SEEK_CUR); |
| |
| if (pos == (off_t)-1) |
| return 0; |
| |
| return pos; |
| } |
| |
| static gboolean |
| g_local_file_input_stream_can_seek (GFileInputStream *stream) |
| { |
| GLocalFileInputStream *file; |
| off_t pos; |
| |
| file = G_LOCAL_FILE_INPUT_STREAM (stream); |
| |
| pos = lseek (file->priv->fd, 0, SEEK_CUR); |
| |
| if (pos == (off_t)-1 && errno == ESPIPE) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| static int |
| seek_type_to_lseek (GSeekType type) |
| { |
| switch (type) |
| { |
| default: |
| case G_SEEK_CUR: |
| return SEEK_CUR; |
| |
| case G_SEEK_SET: |
| return SEEK_SET; |
| |
| case G_SEEK_END: |
| return SEEK_END; |
| } |
| } |
| |
| static gboolean |
| g_local_file_input_stream_seek (GFileInputStream *stream, |
| goffset offset, |
| GSeekType type, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| GLocalFileInputStream *file; |
| off_t pos; |
| |
| file = G_LOCAL_FILE_INPUT_STREAM (stream); |
| |
| pos = lseek (file->priv->fd, offset, seek_type_to_lseek (type)); |
| |
| if (pos == (off_t)-1) |
| { |
| int errsv = errno; |
| |
| g_set_error (error, G_IO_ERROR, |
| g_io_error_from_errno (errsv), |
| _("Error seeking in file: %s"), |
| g_strerror (errsv)); |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| static GFileInfo * |
| g_local_file_input_stream_query_info (GFileInputStream *stream, |
| const char *attributes, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| GLocalFileInputStream *file; |
| |
| file = G_LOCAL_FILE_INPUT_STREAM (stream); |
| |
| if (g_cancellable_set_error_if_cancelled (cancellable, error)) |
| return NULL; |
| |
| return _g_local_file_info_get_from_fd (file->priv->fd, |
| attributes, |
| error); |
| } |
| |
| #ifdef G_OS_UNIX |
| static int |
| g_local_file_input_stream_get_fd (GFileDescriptorBased *fd_based) |
| { |
| GLocalFileInputStream *stream = G_LOCAL_FILE_INPUT_STREAM (fd_based); |
| return stream->priv->fd; |
| } |
| #endif |