From c152ceba090840be100ae6eeb90b639b85420ec7 Mon Sep 17 00:00:00 2001 From: Ryan Lortie Date: Mon, 3 Jun 2013 16:16:25 -0400 Subject: [PATCH] g_file_set_contents(): don't allocate display name g_file_set_contents() sets a GError in the event of various failures that count occur. It uses g_filename_display_name() in order to get the filename to include in the messages. Factor out the error handling to make it easier to allocate the display name only when we need it (instead of allocating it every time). https://bugzilla.gnome.org/show_bug.cgi?id=701560 --- glib/gfileutils.c | 124 ++++++++++++++++++++---------------------------------- 1 file changed, 46 insertions(+), 78 deletions(-) diff --git a/glib/gfileutils.c b/glib/gfileutils.c index d0c1fc9..093a461 100644 --- a/glib/gfileutils.c +++ b/glib/gfileutils.c @@ -1004,6 +1004,27 @@ rename_file (const char *old_name, return TRUE; } +/* format string must have two '%s': + * + * - the place for the filename + * - the place for the strerror + */ +static void +format_error_message (GError **error, + const gchar *filename, + const gchar *format_string) +{ + gint saved_errno = errno; + gchar *display_name; + + display_name = g_filename_display_name (filename); + + g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (saved_errno), + format_string, display_name, g_strerror (saved_errno)); + + g_free (display_name); +} + static gchar * write_to_temp_file (const gchar *contents, gssize length, @@ -1011,30 +1032,20 @@ write_to_temp_file (const gchar *contents, GError **err) { gchar *tmp_name; - gchar *display_name; gchar *retval; FILE *file; gint fd; - int save_errno; retval = NULL; - + tmp_name = g_strdup_printf ("%s.XXXXXX", dest_file); errno = 0; fd = g_mkstemp_full (tmp_name, O_RDWR | O_BINARY, 0666); - save_errno = errno; - display_name = g_filename_display_name (tmp_name); - if (fd == -1) { - g_set_error (err, - G_FILE_ERROR, - g_file_error_from_errno (save_errno), - _("Failed to create file '%s': %s"), - display_name, g_strerror (save_errno)); - + format_error_message (err, tmp_name, _("Failed to create file '%s': %s")); goto out; } @@ -1042,17 +1053,10 @@ write_to_temp_file (const gchar *contents, file = fdopen (fd, "wb"); if (!file) { - save_errno = errno; - g_set_error (err, - G_FILE_ERROR, - g_file_error_from_errno (save_errno), - _("Failed to open file '%s' for writing: fdopen() failed: %s"), - display_name, - g_strerror (save_errno)); - + format_error_message (err, tmp_name, _("Failed to open file '%s' for writing: fdopen() failed: %s")); close (fd); g_unlink (tmp_name); - + goto out; } @@ -1066,44 +1070,27 @@ write_to_temp_file (const gchar *contents, */ (void) posix_fallocate (fd, 0, length); #endif - + errno = 0; n_written = fwrite (contents, 1, length, file); if (n_written < length) - { - save_errno = errno; - - g_set_error (err, - G_FILE_ERROR, - g_file_error_from_errno (save_errno), - _("Failed to write file '%s': fwrite() failed: %s"), - display_name, - g_strerror (save_errno)); - - fclose (file); - g_unlink (tmp_name); - - goto out; - } + { + format_error_message (err, tmp_name, _("Failed to write file '%s': fwrite() failed: %s")); + fclose (file); + g_unlink (tmp_name); + goto out; + } } errno = 0; if (fflush (file) != 0) - { - save_errno = errno; - - g_set_error (err, - G_FILE_ERROR, - g_file_error_from_errno (save_errno), - _("Failed to write file '%s': fflush() failed: %s"), - display_name, - g_strerror (save_errno)); - + { + format_error_message (err, tmp_name, _("Failed to write file '%s': fflush() failed: %s")); fclose (file); g_unlink (tmp_name); - + goto out; } @@ -1120,7 +1107,7 @@ write_to_temp_file (const gchar *contents, goto no_fsync; } #endif - + #ifdef HAVE_FSYNC { struct stat statbuf; @@ -1132,23 +1119,13 @@ write_to_temp_file (const gchar *contents, * the new and the old file on some filesystems. (I.E. those that don't * guarantee the data is written to the disk before the metadata.) */ - if (g_lstat (dest_file, &statbuf) == 0 && - statbuf.st_size > 0 && - fsync (fileno (file)) != 0) + if (g_lstat (dest_file, &statbuf) == 0 && statbuf.st_size > 0 && fsync (fileno (file)) != 0) { - save_errno = errno; - - g_set_error (err, - G_FILE_ERROR, - g_file_error_from_errno (save_errno), - _("Failed to write file '%s': fsync() failed: %s"), - display_name, - g_strerror (save_errno)); - + format_error_message (err, tmp_name, _("Failed to write file '%s': fsync() failed: %s")); fclose (file); - g_unlink (tmp_name); + g_unlink (tmp_name); - goto out; + goto out; } } #endif @@ -1156,30 +1133,21 @@ write_to_temp_file (const gchar *contents, #ifdef BTRFS_SUPER_MAGIC no_fsync: #endif - + errno = 0; if (fclose (file) == EOF) - { - save_errno = errno; - - g_set_error (err, - G_FILE_ERROR, - g_file_error_from_errno (save_errno), - _("Failed to close file '%s': fclose() failed: %s"), - display_name, - g_strerror (save_errno)); - + { + format_error_message (err, tmp_name, _("Failed to close file '%s': fclose() failed: %s")); g_unlink (tmp_name); - + goto out; } retval = g_strdup (tmp_name); - + out: g_free (tmp_name); - g_free (display_name); - + return retval; } -- 2.7.4