1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright (C) 2006-2007 Red Hat, Inc.
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.
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.
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.
20 * Author: Alexander Larsson <alexl@redhat.com>
25 #include <sys/types.h>
35 #include <glib/gstdio.h>
38 #include "gcancellable.h"
39 #include "glocalfileoutputstream.h"
40 #include "glocalfileinfo.h"
43 #include "gfiledescriptorbased.h"
49 #define S_ISDIR(m) (((m) & _S_IFMT) == _S_IFDIR)
52 #define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)
62 static void g_file_descriptor_based_iface_init (GFileDescriptorBasedIface *iface);
65 #define g_local_file_output_stream_get_type _g_local_file_output_stream_get_type
67 G_DEFINE_TYPE_WITH_CODE (GLocalFileOutputStream, g_local_file_output_stream, G_TYPE_FILE_OUTPUT_STREAM,
68 G_IMPLEMENT_INTERFACE (G_TYPE_FILE_DESCRIPTOR_BASED,
69 g_file_descriptor_based_iface_init)
72 G_DEFINE_TYPE_WITH_CODE (GLocalFileOutputStream, g_local_file_output_stream, G_TYPE_FILE_OUTPUT_STREAM,);
76 /* Some of the file replacement code was based on the code from gedit,
77 * relicenced to LGPL with permissions from the authors.
80 #define BACKUP_EXTENSION "~"
82 struct _GLocalFileOutputStreamPrivate {
84 char *original_filename;
85 char *backup_filename;
87 guint sync_on_close : 1;
92 static gssize g_local_file_output_stream_write (GOutputStream *stream,
95 GCancellable *cancellable,
97 static gboolean g_local_file_output_stream_close (GOutputStream *stream,
98 GCancellable *cancellable,
100 static GFileInfo *g_local_file_output_stream_query_info (GFileOutputStream *stream,
101 const char *attributes,
102 GCancellable *cancellable,
104 static char * g_local_file_output_stream_get_etag (GFileOutputStream *stream);
105 static goffset g_local_file_output_stream_tell (GFileOutputStream *stream);
106 static gboolean g_local_file_output_stream_can_seek (GFileOutputStream *stream);
107 static gboolean g_local_file_output_stream_seek (GFileOutputStream *stream,
110 GCancellable *cancellable,
112 static gboolean g_local_file_output_stream_can_truncate (GFileOutputStream *stream);
113 static gboolean g_local_file_output_stream_truncate (GFileOutputStream *stream,
115 GCancellable *cancellable,
118 static int g_local_file_output_stream_get_fd (GFileDescriptorBased *stream);
122 g_local_file_output_stream_finalize (GObject *object)
124 GLocalFileOutputStream *file;
126 file = G_LOCAL_FILE_OUTPUT_STREAM (object);
128 g_free (file->priv->tmp_filename);
129 g_free (file->priv->original_filename);
130 g_free (file->priv->backup_filename);
131 g_free (file->priv->etag);
133 G_OBJECT_CLASS (g_local_file_output_stream_parent_class)->finalize (object);
138 g_local_file_output_stream_class_init (GLocalFileOutputStreamClass *klass)
140 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
141 GOutputStreamClass *stream_class = G_OUTPUT_STREAM_CLASS (klass);
142 GFileOutputStreamClass *file_stream_class = G_FILE_OUTPUT_STREAM_CLASS (klass);
144 g_type_class_add_private (klass, sizeof (GLocalFileOutputStreamPrivate));
146 gobject_class->finalize = g_local_file_output_stream_finalize;
148 stream_class->write_fn = g_local_file_output_stream_write;
149 stream_class->close_fn = g_local_file_output_stream_close;
150 file_stream_class->query_info = g_local_file_output_stream_query_info;
151 file_stream_class->get_etag = g_local_file_output_stream_get_etag;
152 file_stream_class->tell = g_local_file_output_stream_tell;
153 file_stream_class->can_seek = g_local_file_output_stream_can_seek;
154 file_stream_class->seek = g_local_file_output_stream_seek;
155 file_stream_class->can_truncate = g_local_file_output_stream_can_truncate;
156 file_stream_class->truncate_fn = g_local_file_output_stream_truncate;
161 g_file_descriptor_based_iface_init (GFileDescriptorBasedIface *iface)
163 iface->get_fd = g_local_file_output_stream_get_fd;
168 g_local_file_output_stream_init (GLocalFileOutputStream *stream)
170 stream->priv = G_TYPE_INSTANCE_GET_PRIVATE (stream,
171 G_TYPE_LOCAL_FILE_OUTPUT_STREAM,
172 GLocalFileOutputStreamPrivate);
173 stream->priv->do_close = TRUE;
177 g_local_file_output_stream_write (GOutputStream *stream,
180 GCancellable *cancellable,
183 GLocalFileOutputStream *file;
186 file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
190 if (g_cancellable_set_error_if_cancelled (cancellable, error))
192 res = write (file->priv->fd, buffer, count);
200 g_set_error (error, G_IO_ERROR,
201 g_io_error_from_errno (errsv),
202 _("Error writing to file: %s"),
213 _g_local_file_output_stream_set_do_close (GLocalFileOutputStream *out,
216 out->priv->do_close = do_close;
220 _g_local_file_output_stream_really_close (GLocalFileOutputStream *file,
221 GCancellable *cancellable,
224 GLocalFileStat final_stat;
228 if (file->priv->sync_on_close &&
229 fsync (file->priv->fd) != 0)
233 g_set_error (error, G_IO_ERROR,
234 g_io_error_from_errno (errsv),
235 _("Error writing to file: %s"),
243 /* Must close before renaming on Windows, so just do the close first
244 * in all cases for now.
246 if (_fstati64 (file->priv->fd, &final_stat) == 0)
247 file->priv->etag = _g_local_file_info_create_etag (&final_stat);
249 res = close (file->priv->fd);
254 g_set_error (error, G_IO_ERROR,
255 g_io_error_from_errno (errsv),
256 _("Error closing file: %s"),
263 if (file->priv->tmp_filename)
265 /* We need to move the temp file to its final place,
266 * and possibly create the backup file
269 if (file->priv->backup_filename)
271 if (g_cancellable_set_error_if_cancelled (cancellable, error))
275 /* create original -> backup link, the original is then renamed over */
276 if (g_unlink (file->priv->backup_filename) != 0 &&
281 g_set_error (error, G_IO_ERROR,
282 G_IO_ERROR_CANT_CREATE_BACKUP,
283 _("Error removing old backup link: %s"),
288 if (link (file->priv->original_filename, file->priv->backup_filename) != 0)
290 /* link failed or is not supported, try rename */
291 if (g_rename (file->priv->original_filename, file->priv->backup_filename) != 0)
295 g_set_error (error, G_IO_ERROR,
296 G_IO_ERROR_CANT_CREATE_BACKUP,
297 _("Error creating backup copy: %s"),
303 /* If link not supported, just rename... */
304 if (g_rename (file->priv->original_filename, file->priv->backup_filename) != 0)
308 g_set_error (error, G_IO_ERROR,
309 G_IO_ERROR_CANT_CREATE_BACKUP,
310 _("Error creating backup copy: %s"),
318 if (g_cancellable_set_error_if_cancelled (cancellable, error))
321 /* tmp -> original */
322 if (g_rename (file->priv->tmp_filename, file->priv->original_filename) != 0)
326 g_set_error (error, G_IO_ERROR,
327 g_io_error_from_errno (errsv),
328 _("Error renaming temporary file: %s"),
333 g_clear_pointer (&file->priv->tmp_filename, g_free);
336 if (g_cancellable_set_error_if_cancelled (cancellable, error))
339 #ifndef G_OS_WIN32 /* Already did the fstat() and close() above on Win32 */
341 if (fstat (file->priv->fd, &final_stat) == 0)
342 file->priv->etag = _g_local_file_info_create_etag (&final_stat);
346 res = close (file->priv->fd);
351 g_set_error (error, G_IO_ERROR,
352 g_io_error_from_errno (errsv),
353 _("Error closing file: %s"),
370 /* A simple try to close the fd in case we fail before the actual close */
371 close (file->priv->fd);
373 if (file->priv->tmp_filename)
374 g_unlink (file->priv->tmp_filename);
381 g_local_file_output_stream_close (GOutputStream *stream,
382 GCancellable *cancellable,
385 GLocalFileOutputStream *file;
387 file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
389 if (file->priv->do_close)
390 return _g_local_file_output_stream_really_close (file,
397 g_local_file_output_stream_get_etag (GFileOutputStream *stream)
399 GLocalFileOutputStream *file;
401 file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
403 return g_strdup (file->priv->etag);
407 g_local_file_output_stream_tell (GFileOutputStream *stream)
409 GLocalFileOutputStream *file;
412 file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
414 pos = lseek (file->priv->fd, 0, SEEK_CUR);
416 if (pos == (off_t)-1)
423 g_local_file_output_stream_can_seek (GFileOutputStream *stream)
425 GLocalFileOutputStream *file;
428 file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
430 pos = lseek (file->priv->fd, 0, SEEK_CUR);
432 if (pos == (off_t)-1 && errno == ESPIPE)
439 seek_type_to_lseek (GSeekType type)
456 g_local_file_output_stream_seek (GFileOutputStream *stream,
459 GCancellable *cancellable,
462 GLocalFileOutputStream *file;
465 file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
467 pos = lseek (file->priv->fd, offset, seek_type_to_lseek (type));
469 if (pos == (off_t)-1)
473 g_set_error (error, G_IO_ERROR,
474 g_io_error_from_errno (errsv),
475 _("Error seeking in file: %s"),
484 g_local_file_output_stream_can_truncate (GFileOutputStream *stream)
486 /* We can't truncate pipes and stuff where we can't seek */
487 return g_local_file_output_stream_can_seek (stream);
491 g_local_file_output_stream_truncate (GFileOutputStream *stream,
493 GCancellable *cancellable,
496 GLocalFileOutputStream *file;
499 file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
503 res = g_win32_ftruncate (file->priv->fd, size);
505 res = ftruncate (file->priv->fd, size);
514 if (g_cancellable_set_error_if_cancelled (cancellable, error))
519 g_set_error (error, G_IO_ERROR,
520 g_io_error_from_errno (errsv),
521 _("Error truncating file: %s"),
531 g_local_file_output_stream_query_info (GFileOutputStream *stream,
532 const char *attributes,
533 GCancellable *cancellable,
536 GLocalFileOutputStream *file;
538 file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
540 if (g_cancellable_set_error_if_cancelled (cancellable, error))
543 return _g_local_file_info_get_from_fd (file->priv->fd,
549 _g_local_file_output_stream_new (int fd)
551 GLocalFileOutputStream *stream;
553 stream = g_object_new (G_TYPE_LOCAL_FILE_OUTPUT_STREAM, NULL);
554 stream->priv->fd = fd;
555 return G_FILE_OUTPUT_STREAM (stream);
559 _g_local_file_output_stream_open (const char *filename,
561 GCancellable *cancellable,
564 GLocalFileOutputStream *stream;
568 if (g_cancellable_set_error_if_cancelled (cancellable, error))
571 open_flags = O_BINARY;
573 open_flags |= O_RDWR;
575 open_flags |= O_WRONLY;
577 fd = g_open (filename, open_flags, 0666);
583 /* This must be an invalid filename, on e.g. FAT */
584 g_set_error_literal (error, G_IO_ERROR,
585 G_IO_ERROR_INVALID_FILENAME,
586 _("Invalid filename"));
589 char *display_name = g_filename_display_name (filename);
590 g_set_error (error, G_IO_ERROR,
591 g_io_error_from_errno (errsv),
592 _("Error opening file '%s': %s"),
593 display_name, g_strerror (errsv));
594 g_free (display_name);
599 stream = g_object_new (G_TYPE_LOCAL_FILE_OUTPUT_STREAM, NULL);
600 stream->priv->fd = fd;
601 return G_FILE_OUTPUT_STREAM (stream);
605 _g_local_file_output_stream_create (const char *filename,
607 GFileCreateFlags flags,
608 GCancellable *cancellable,
611 GLocalFileOutputStream *stream;
616 if (g_cancellable_set_error_if_cancelled (cancellable, error))
619 if (flags & G_FILE_CREATE_PRIVATE)
624 open_flags = O_CREAT | O_EXCL | O_BINARY;
626 open_flags |= O_RDWR;
628 open_flags |= O_WRONLY;
630 fd = g_open (filename, open_flags, mode);
636 /* This must be an invalid filename, on e.g. FAT */
637 g_set_error_literal (error, G_IO_ERROR,
638 G_IO_ERROR_INVALID_FILENAME,
639 _("Invalid filename"));
642 char *display_name = g_filename_display_name (filename);
643 g_set_error (error, G_IO_ERROR,
644 g_io_error_from_errno (errsv),
645 _("Error opening file '%s': %s"),
646 display_name, g_strerror (errsv));
647 g_free (display_name);
652 stream = g_object_new (G_TYPE_LOCAL_FILE_OUTPUT_STREAM, NULL);
653 stream->priv->fd = fd;
654 return G_FILE_OUTPUT_STREAM (stream);
658 _g_local_file_output_stream_append (const char *filename,
659 GFileCreateFlags flags,
660 GCancellable *cancellable,
663 GLocalFileOutputStream *stream;
667 if (g_cancellable_set_error_if_cancelled (cancellable, error))
670 if (flags & G_FILE_CREATE_PRIVATE)
675 fd = g_open (filename, O_CREAT | O_APPEND | O_WRONLY | O_BINARY, mode);
681 /* This must be an invalid filename, on e.g. FAT */
682 g_set_error_literal (error, G_IO_ERROR,
683 G_IO_ERROR_INVALID_FILENAME,
684 _("Invalid filename"));
687 char *display_name = g_filename_display_name (filename);
688 g_set_error (error, G_IO_ERROR,
689 g_io_error_from_errno (errsv),
690 _("Error opening file '%s': %s"),
691 display_name, g_strerror (errsv));
692 g_free (display_name);
697 stream = g_object_new (G_TYPE_LOCAL_FILE_OUTPUT_STREAM, NULL);
698 stream->priv->fd = fd;
700 return G_FILE_OUTPUT_STREAM (stream);
704 create_backup_filename (const char *filename)
706 return g_strconcat (filename, BACKUP_EXTENSION, NULL);
709 #define BUFSIZE 8192 /* size of normal write buffer */
712 copy_file_data (gint sfd,
718 const gchar *write_buffer;
720 gssize bytes_to_write;
721 gssize bytes_written;
723 buffer = g_malloc (BUFSIZE);
727 bytes_read = read (sfd, buffer, BUFSIZE);
728 if (bytes_read == -1)
735 g_set_error (error, G_IO_ERROR,
736 g_io_error_from_errno (errsv),
737 _("Error reading from file: %s"),
743 bytes_to_write = bytes_read;
744 write_buffer = buffer;
748 bytes_written = write (dfd, write_buffer, bytes_to_write);
749 if (bytes_written == -1)
756 g_set_error (error, G_IO_ERROR,
757 g_io_error_from_errno (errsv),
758 _("Error writing to file: %s"),
764 bytes_to_write -= bytes_written;
765 write_buffer += bytes_written;
767 while (bytes_to_write > 0);
769 } while ((bytes_read != 0) && (ret == TRUE));
777 handle_overwrite_open (const char *filename,
780 gboolean create_backup,
781 char **temp_filename,
782 GFileCreateFlags flags,
783 GCancellable *cancellable,
787 GLocalFileStat original_stat;
794 if (flags & G_FILE_CREATE_PRIVATE)
799 /* We only need read access to the original file if we are creating a backup.
800 * We also add O_CREATE to avoid a race if the file was just removed */
801 if (create_backup || readable)
802 open_flags = O_RDWR | O_CREAT | O_BINARY;
804 open_flags = O_WRONLY | O_CREAT | O_BINARY;
806 /* Some systems have O_NOFOLLOW, which lets us avoid some races
807 * when finding out if the file we opened was a symlink */
810 fd = g_open (filename, open_flags | O_NOFOLLOW, mode);
811 if (fd == -1 && errno == ELOOP)
813 /* Could be a symlink, or it could be a regular ELOOP error,
814 * but then the next open will fail too. */
816 fd = g_open (filename, open_flags, mode);
819 fd = g_open (filename, open_flags, mode);
820 /* This is racy, but we do it as soon as possible to minimize the race */
821 is_symlink = g_file_test (filename, G_FILE_TEST_IS_SYMLINK);
827 char *display_name = g_filename_display_name (filename);
828 g_set_error (error, G_IO_ERROR,
829 g_io_error_from_errno (errsv),
830 _("Error opening file '%s': %s"),
831 display_name, g_strerror (errsv));
832 g_free (display_name);
837 res = _fstati64 (fd, &original_stat);
839 res = fstat (fd, &original_stat);
845 char *display_name = g_filename_display_name (filename);
846 g_set_error (error, G_IO_ERROR,
847 g_io_error_from_errno (errsv),
848 _("Error when getting information for file '%s': %s"),
849 display_name, g_strerror (errsv));
850 g_free (display_name);
854 /* not a regular file */
855 if (!S_ISREG (original_stat.st_mode))
857 if (S_ISDIR (original_stat.st_mode))
858 g_set_error_literal (error,
860 G_IO_ERROR_IS_DIRECTORY,
861 _("Target file is a directory"));
863 g_set_error_literal (error,
865 G_IO_ERROR_NOT_REGULAR_FILE,
866 _("Target file is not a regular file"));
872 current_etag = _g_local_file_info_create_etag (&original_stat);
873 if (strcmp (etag, current_etag) != 0)
875 g_set_error_literal (error,
877 G_IO_ERROR_WRONG_ETAG,
878 _("The file was externally modified"));
879 g_free (current_etag);
882 g_free (current_etag);
885 /* We use two backup strategies.
886 * The first one (which is faster) consist in saving to a
887 * tmp file then rename the original file to the backup and the
888 * tmp file to the original name. This is fast but doesn't work
889 * when the file is a link (hard or symbolic) or when we can't
890 * write to the current dir or can't set the permissions on the
892 * The second strategy consist simply in copying the old file
893 * to a backup file and rewrite the contents of the file.
896 if ((flags & G_FILE_CREATE_REPLACE_DESTINATION) ||
897 (!(original_stat.st_nlink > 1) && !is_symlink))
899 char *dirname, *tmp_filename;
902 dirname = g_path_get_dirname (filename);
903 tmp_filename = g_build_filename (dirname, ".goutputstream-XXXXXX", NULL);
906 tmpfd = g_mkstemp_full (tmp_filename, (readable ? O_RDWR : O_WRONLY) | O_BINARY, mode);
909 g_free (tmp_filename);
910 goto fallback_strategy;
913 /* try to keep permissions (unless replacing) */
915 if ( ! (flags & G_FILE_CREATE_REPLACE_DESTINATION) &&
918 fchown (tmpfd, original_stat.st_uid, original_stat.st_gid) == -1 ||
921 fchmod (tmpfd, original_stat.st_mode) == -1 ||
927 GLocalFileStat tmp_statbuf;
931 tres = _fstati64 (tmpfd, &tmp_statbuf);
933 tres = fstat (tmpfd, &tmp_statbuf);
935 /* Check that we really needed to change something */
937 original_stat.st_uid != tmp_statbuf.st_uid ||
938 original_stat.st_gid != tmp_statbuf.st_gid ||
939 original_stat.st_mode != tmp_statbuf.st_mode)
942 g_unlink (tmp_filename);
943 g_free (tmp_filename);
944 goto fallback_strategy;
949 *temp_filename = tmp_filename;
957 #if defined(HAVE_FCHOWN) && defined(HAVE_FCHMOD)
958 struct stat tmp_statbuf;
960 char *backup_filename;
963 backup_filename = create_backup_filename (filename);
965 if (g_unlink (backup_filename) == -1 && errno != ENOENT)
967 g_set_error_literal (error,
969 G_IO_ERROR_CANT_CREATE_BACKUP,
970 _("Backup file creation failed"));
971 g_free (backup_filename);
975 bfd = g_open (backup_filename,
976 O_WRONLY | O_CREAT | O_EXCL | O_BINARY,
977 original_stat.st_mode & 0777);
981 g_set_error_literal (error,
983 G_IO_ERROR_CANT_CREATE_BACKUP,
984 _("Backup file creation failed"));
985 g_free (backup_filename);
989 /* If needed, Try to set the group of the backup same as the
990 * original file. If this fails, set the protection
991 * bits for the group same as the protection bits for
993 #if defined(HAVE_FCHOWN) && defined(HAVE_FCHMOD)
994 if (fstat (bfd, &tmp_statbuf) != 0)
996 g_set_error_literal (error,
998 G_IO_ERROR_CANT_CREATE_BACKUP,
999 _("Backup file creation failed"));
1000 g_unlink (backup_filename);
1001 g_free (backup_filename);
1005 if ((original_stat.st_gid != tmp_statbuf.st_gid) &&
1006 fchown (bfd, (uid_t) -1, original_stat.st_gid) != 0)
1009 (original_stat.st_mode & 0707) |
1010 ((original_stat.st_mode & 07) << 3)) != 0)
1012 g_set_error_literal (error,
1014 G_IO_ERROR_CANT_CREATE_BACKUP,
1015 _("Backup file creation failed"));
1016 g_unlink (backup_filename);
1018 g_free (backup_filename);
1024 if (!copy_file_data (fd, bfd, NULL))
1026 g_set_error_literal (error,
1028 G_IO_ERROR_CANT_CREATE_BACKUP,
1029 _("Backup file creation failed"));
1030 g_unlink (backup_filename);
1032 g_free (backup_filename);
1038 g_free (backup_filename);
1040 /* Seek back to the start of the file after the backup copy */
1041 if (lseek (fd, 0, SEEK_SET) == -1)
1045 g_set_error (error, G_IO_ERROR,
1046 g_io_error_from_errno (errsv),
1047 _("Error seeking in file: %s"),
1048 g_strerror (errsv));
1053 if (flags & G_FILE_CREATE_REPLACE_DESTINATION)
1057 if (g_unlink (filename) != 0)
1061 g_set_error (error, G_IO_ERROR,
1062 g_io_error_from_errno (errsv),
1063 _("Error removing old file: %s"),
1064 g_strerror (errsv));
1069 open_flags = O_RDWR | O_CREAT | O_BINARY;
1071 open_flags = O_WRONLY | O_CREAT | O_BINARY;
1072 fd = g_open (filename, open_flags, mode);
1076 char *display_name = g_filename_display_name (filename);
1077 g_set_error (error, G_IO_ERROR,
1078 g_io_error_from_errno (errsv),
1079 _("Error opening file '%s': %s"),
1080 display_name, g_strerror (errsv));
1081 g_free (display_name);
1087 /* Truncate the file at the start */
1089 if (g_win32_ftruncate (fd, 0) == -1)
1091 if (ftruncate (fd, 0) == -1)
1096 g_set_error (error, G_IO_ERROR,
1097 g_io_error_from_errno (errsv),
1098 _("Error truncating file: %s"),
1099 g_strerror (errsv));
1113 _g_local_file_output_stream_replace (const char *filename,
1116 gboolean create_backup,
1117 GFileCreateFlags flags,
1118 GCancellable *cancellable,
1121 GLocalFileOutputStream *stream;
1125 gboolean sync_on_close;
1128 if (g_cancellable_set_error_if_cancelled (cancellable, error))
1133 if (flags & G_FILE_CREATE_PRIVATE)
1137 sync_on_close = FALSE;
1139 /* If the file doesn't exist, create it */
1140 open_flags = O_CREAT | O_EXCL | O_BINARY;
1142 open_flags |= O_RDWR;
1144 open_flags |= O_WRONLY;
1145 fd = g_open (filename, open_flags, mode);
1147 if (fd == -1 && errno == EEXIST)
1149 /* The file already exists */
1150 fd = handle_overwrite_open (filename, readable, etag,
1151 create_backup, &temp_file,
1152 flags, cancellable, error);
1156 /* If the final destination exists, we want to sync the newly written
1157 * file to ensure the data is on disk when we rename over the destination.
1158 * otherwise if we get a system crash we can lose both the new and the
1159 * old file on some filesystems. (I.E. those that don't guarantee the
1160 * data is written to the disk before the metadata.)
1162 sync_on_close = TRUE;
1168 if (errsv == EINVAL)
1169 /* This must be an invalid filename, on e.g. FAT */
1170 g_set_error_literal (error, G_IO_ERROR,
1171 G_IO_ERROR_INVALID_FILENAME,
1172 _("Invalid filename"));
1175 char *display_name = g_filename_display_name (filename);
1176 g_set_error (error, G_IO_ERROR,
1177 g_io_error_from_errno (errsv),
1178 _("Error opening file '%s': %s"),
1179 display_name, g_strerror (errsv));
1180 g_free (display_name);
1186 stream = g_object_new (G_TYPE_LOCAL_FILE_OUTPUT_STREAM, NULL);
1187 stream->priv->fd = fd;
1188 stream->priv->sync_on_close = sync_on_close;
1189 stream->priv->tmp_filename = temp_file;
1191 stream->priv->backup_filename = create_backup_filename (filename);
1192 stream->priv->original_filename = g_strdup (filename);
1194 return G_FILE_OUTPUT_STREAM (stream);
1198 _g_local_file_output_stream_get_fd (GLocalFileOutputStream *stream)
1200 g_return_val_if_fail (G_IS_LOCAL_FILE_OUTPUT_STREAM (stream), -1);
1201 return stream->priv->fd;
1206 g_local_file_output_stream_get_fd (GFileDescriptorBased *fd_based)
1208 GLocalFileOutputStream *stream = G_LOCAL_FILE_OUTPUT_STREAM (fd_based);
1209 return _g_local_file_output_stream_get_fd (stream);