diff options
Diffstat (limited to 'app/config/gimpconfig-file.c')
| -rw-r--r-- | app/config/gimpconfig-file.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/app/config/gimpconfig-file.c b/app/config/gimpconfig-file.c new file mode 100644 index 0000000..9823b8f --- /dev/null +++ b/app/config/gimpconfig-file.c @@ -0,0 +1,241 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis + * + * File Utitility functions for GimpConfig. + * Copyright (C) 2001-2003 Sven Neumann <sven@gimp.org> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <errno.h> +#include <sys/types.h> + +#include <gio/gio.h> +#include <glib/gstdio.h> + +#include "libgimpbase/gimpbase.h" +#include "libgimpconfig/gimpconfig.h" + +#ifdef G_OS_WIN32 +#include "libgimpbase/gimpwin32-io.h" +#endif + +#include "config-types.h" + +#include "gimpconfig-file.h" + +#include "gimp-intl.h" + + +gboolean +gimp_config_file_copy (const gchar *source, + const gchar *dest, + const gchar *old_options_pattern, + GRegexEvalCallback update_callback, + GError **error) +{ + gchar buffer[8192]; + FILE *sfile; + FILE *dfile; + GStatBuf stat_buf; + gint nbytes; + gint unwritten_len = 0; + GRegex *old_options_regexp = NULL; + + if (old_options_pattern && update_callback) + { + old_options_regexp = g_regex_new (old_options_pattern, 0, 0, error); + + /* error set by g_regex_new. */ + if (! old_options_regexp) + return FALSE; + } + + sfile = g_fopen (source, "rb"); + if (sfile == NULL) + { + g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno), + _("Could not open '%s' for reading: %s"), + gimp_filename_to_utf8 (source), g_strerror (errno)); + if (old_options_regexp) + g_regex_unref (old_options_regexp); + return FALSE; + } + + dfile = g_fopen (dest, "wb"); + if (dfile == NULL) + { + g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno), + _("Could not open '%s' for writing: %s"), + gimp_filename_to_utf8 (dest), g_strerror (errno)); + fclose (sfile); + if (old_options_regexp) + g_regex_unref (old_options_regexp); + return FALSE; + } + + while ((nbytes = fread (buffer + unwritten_len, 1, + sizeof (buffer) - unwritten_len, sfile)) > 0 || unwritten_len) + { + size_t read_len = nbytes + unwritten_len; + size_t write_len; + gchar* eol = NULL; + gchar* write_bytes = NULL; + + if (old_options_regexp && update_callback) + { + eol = g_strrstr_len (buffer, read_len, "\n"); + if (eol) + { + *eol = '\0'; + read_len = strlen (buffer) + 1; + *eol++ = '\n'; + } + else if (! feof (sfile)) + { + gchar format[256]; + + /* We are in unlikely case where a single config line is + * longer than the buffer! + */ + + g_snprintf (format, sizeof (format), + _("Error parsing '%%s': line longer than %s characters."), + G_GINT64_FORMAT); + + g_set_error (error, GIMP_CONFIG_ERROR, GIMP_CONFIG_ERROR_PARSE, + format, + gimp_filename_to_utf8 (source), + (gint64) sizeof (buffer)); + + fclose (sfile); + fclose (dfile); + g_regex_unref (old_options_regexp); + return FALSE; + } + + write_bytes = g_regex_replace_eval (old_options_regexp, buffer, + read_len, 0, 0, update_callback, + NULL, error); + if (write_bytes == NULL) + { + /* error already set. */ + fclose (sfile); + fclose (dfile); + g_regex_unref (old_options_regexp); + return FALSE; + } + write_len = strlen (write_bytes); + } + else + { + write_bytes = buffer; + write_len = read_len; + } + + if (fwrite (write_bytes, 1, write_len, dfile) < write_len) + { + g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno), + _("Error writing '%s': %s"), + gimp_filename_to_utf8 (dest), g_strerror (errno)); + if (old_options_regexp && update_callback) + { + g_free (write_bytes); + g_regex_unref (old_options_regexp); + } + fclose (sfile); + fclose (dfile); + return FALSE; + } + + if (old_options_regexp && update_callback) + { + g_free (write_bytes); + + if (eol) + { + unwritten_len = nbytes + unwritten_len - read_len; + memmove (buffer, eol, unwritten_len); + } + else + /* EOF */ + break; + } + } + + if (ferror (sfile)) + { + g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno), + _("Error reading '%s': %s"), + gimp_filename_to_utf8 (source), g_strerror (errno)); + fclose (sfile); + fclose (dfile); + if (old_options_regexp) + g_regex_unref (old_options_regexp); + return FALSE; + } + + fclose (sfile); + + if (fclose (dfile) == EOF) + { + g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno), + _("Error writing '%s': %s"), + gimp_filename_to_utf8 (dest), g_strerror (errno)); + if (old_options_regexp) + g_regex_unref (old_options_regexp); + return FALSE; + } + + if (g_stat (source, &stat_buf) == 0) + { + g_chmod (dest, stat_buf.st_mode); + } + + if (old_options_regexp) + g_regex_unref (old_options_regexp); + return TRUE; +} + +gboolean +gimp_config_file_backup_on_error (GFile *file, + const gchar *name, + GError **error) +{ + gchar *path; + gchar *backup; + gboolean success; + + g_return_val_if_fail (G_IS_FILE (file), FALSE); + g_return_val_if_fail (name != NULL, FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + path = g_file_get_path (file); + backup = g_strconcat (path, "~", NULL); + + success = gimp_config_file_copy (path, backup, NULL, NULL, error); + + if (success) + g_message (_("There was an error parsing your '%s' file. " + "Default values will be used. A backup of your " + "configuration has been created at '%s'."), + name, gimp_filename_to_utf8 (backup)); + + g_free (backup); + g_free (path); + + return success; +} |