523 lines
13 KiB
C
523 lines
13 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pikaenvirontable.c
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* (C) 2002 Manish Singh <yosh@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <gio/gio.h>
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#include "libpikabase/pikabase.h"
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#include "libpikaconfig/pikaconfig.h"
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#include "plug-in-types.h"
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#include "pikaenvirontable.h"
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#include "pika-intl.h"
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typedef struct _PikaEnvironValue PikaEnvironValue;
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struct _PikaEnvironValue
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{
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gchar *value;
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gchar *separator;
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};
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static void pika_environ_table_finalize (GObject *object);
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static void pika_environ_table_load_env_file (PikaEnvironTable *environ_table,
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GFile *file);
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static gboolean pika_environ_table_legal_name (gchar *name);
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static void pika_environ_table_populate (PikaEnvironTable *environ_table);
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static void pika_environ_table_populate_one (const gchar *name,
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PikaEnvironValue *val,
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GPtrArray *env_array);
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static gboolean pika_environ_table_pass_through (PikaEnvironTable *environ_table,
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const gchar *name);
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static void pika_environ_table_clear_vars (PikaEnvironTable *environ_table);
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static void pika_environ_table_clear_internal (PikaEnvironTable *environ_table);
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static void pika_environ_table_clear_envp (PikaEnvironTable *environ_table);
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static void pika_environ_table_free_value (PikaEnvironValue *val);
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G_DEFINE_TYPE (PikaEnvironTable, pika_environ_table, G_TYPE_OBJECT)
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#define parent_class pika_environ_table_parent_class
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static void
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pika_environ_table_class_init (PikaEnvironTableClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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object_class->finalize = pika_environ_table_finalize;
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}
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static void
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pika_environ_table_init (PikaEnvironTable *environ_table)
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{
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}
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static void
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pika_environ_table_finalize (GObject *object)
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{
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PikaEnvironTable *environ_table = PIKA_ENVIRON_TABLE (object);
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pika_environ_table_clear_all (environ_table);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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PikaEnvironTable *
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pika_environ_table_new (gboolean verbose)
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{
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PikaEnvironTable *table = g_object_new (PIKA_TYPE_ENVIRON_TABLE, NULL);
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table->verbose = verbose;
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return table;
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}
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static guint
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pika_environ_table_str_hash (gconstpointer v)
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{
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#ifdef G_OS_WIN32
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gchar *p = g_ascii_strup ((const gchar *) v, -1);
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guint retval = g_str_hash (p);
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g_free (p);
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return retval;
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#else
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return g_str_hash (v);
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#endif
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}
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static gboolean
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pika_environ_table_str_equal (gconstpointer v1,
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gconstpointer v2)
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{
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#ifdef G_OS_WIN32
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gchar *string1 = g_ascii_strup ((const gchar *) v1, -1);
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gchar *string2 = g_ascii_strup ((const gchar *) v2, -1);
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gboolean retval = g_str_equal (string1, string2);
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g_free (string1);
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g_free (string2);
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return retval;
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#else
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return g_str_equal (v1, v2);
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#endif
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}
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void
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pika_environ_table_load (PikaEnvironTable *environ_table,
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GList *path)
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{
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GList *list;
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g_return_if_fail (PIKA_IS_ENVIRON_TABLE (environ_table));
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pika_environ_table_clear (environ_table);
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environ_table->vars =
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g_hash_table_new_full (pika_environ_table_str_hash,
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pika_environ_table_str_equal,
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g_free,
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(GDestroyNotify) pika_environ_table_free_value);
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for (list = path; list; list = g_list_next (list))
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{
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GFile *dir = list->data;
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GFileEnumerator *enumerator;
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enumerator =
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g_file_enumerate_children (dir,
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G_FILE_ATTRIBUTE_STANDARD_NAME ","
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G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN ","
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G_FILE_ATTRIBUTE_STANDARD_TYPE,
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G_FILE_QUERY_INFO_NONE,
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NULL, NULL);
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if (enumerator)
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{
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GFileInfo *info;
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while ((info = g_file_enumerator_next_file (enumerator,
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NULL, NULL)))
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{
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if (! g_file_info_get_attribute_boolean (info, G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN) &&
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g_file_info_get_attribute_uint32 (info, G_FILE_ATTRIBUTE_STANDARD_TYPE) == G_FILE_TYPE_REGULAR)
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{
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GFile *file = g_file_enumerator_get_child (enumerator, info);
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pika_environ_table_load_env_file (environ_table, file);
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g_object_unref (file);
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}
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g_object_unref (info);
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}
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g_object_unref (enumerator);
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}
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}
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}
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void
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pika_environ_table_add (PikaEnvironTable *environ_table,
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const gchar *name,
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const gchar *value,
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const gchar *separator)
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{
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PikaEnvironValue *val;
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g_return_if_fail (PIKA_IS_ENVIRON_TABLE (environ_table));
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pika_environ_table_clear_envp (environ_table);
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if (! environ_table->internal)
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environ_table->internal =
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g_hash_table_new_full (g_str_hash, g_str_equal,
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g_free,
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(GDestroyNotify) pika_environ_table_free_value);
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val = g_slice_new (PikaEnvironValue);
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val->value = g_strdup (value);
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val->separator = g_strdup (separator);
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g_hash_table_insert (environ_table->internal, g_strdup (name), val);
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}
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void
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pika_environ_table_remove (PikaEnvironTable *environ_table,
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const gchar *name)
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{
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g_return_if_fail (PIKA_IS_ENVIRON_TABLE (environ_table));
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if (! environ_table->internal)
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return;
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pika_environ_table_clear_envp (environ_table);
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g_hash_table_remove (environ_table->internal, name);
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if (g_hash_table_size (environ_table->internal) == 0)
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pika_environ_table_clear_internal (environ_table);
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}
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void
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pika_environ_table_clear (PikaEnvironTable *environ_table)
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{
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g_return_if_fail (PIKA_IS_ENVIRON_TABLE (environ_table));
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pika_environ_table_clear_envp (environ_table);
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pika_environ_table_clear_vars (environ_table);
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}
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void
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pika_environ_table_clear_all (PikaEnvironTable *environ_table)
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{
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g_return_if_fail (PIKA_IS_ENVIRON_TABLE (environ_table));
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pika_environ_table_clear_envp (environ_table);
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pika_environ_table_clear_vars (environ_table);
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pika_environ_table_clear_internal (environ_table);
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}
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gchar **
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pika_environ_table_get_envp (PikaEnvironTable *environ_table)
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{
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g_return_val_if_fail (PIKA_IS_ENVIRON_TABLE (environ_table), NULL);
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/* Hmm.. should we return a copy here in the future? Not thread safe atm,
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* but the rest of it isn't either.
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*/
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if (! environ_table->envp)
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pika_environ_table_populate (environ_table);
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return environ_table->envp;
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}
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/* private */
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static void
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pika_environ_table_load_env_file (PikaEnvironTable *environ_table,
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GFile *file)
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{
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GInputStream *input;
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GDataInputStream *data_input;
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gchar *buffer;
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gsize buffer_len;
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GError *error = NULL;
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if (environ_table->verbose)
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g_print ("Parsing '%s'\n", pika_file_get_utf8_name (file));
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input = G_INPUT_STREAM (g_file_read (file, NULL, &error));
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if (! input)
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{
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g_message (_("Could not open '%s' for reading: %s"),
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pika_file_get_utf8_name (file),
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error->message);
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g_clear_error (&error);
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return;
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}
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data_input = g_data_input_stream_new (input);
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g_object_unref (input);
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while ((buffer = g_data_input_stream_read_line (data_input, &buffer_len,
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NULL, &error)))
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{
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gchar *name;
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gchar *value;
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gchar *separator;
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gchar *p;
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gchar *q;
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/* Skip comments */
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if (buffer[0] == '#')
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{
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g_free (buffer);
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continue;
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}
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p = strchr (buffer, '=');
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if (! p)
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{
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g_free (buffer);
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continue;
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}
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*p = '\0';
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name = buffer;
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value = p + 1;
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if (name[0] == '\0')
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{
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g_message (_("Empty variable name in environment file %s"),
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pika_file_get_utf8_name (file));
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g_free (buffer);
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continue;
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}
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separator = NULL;
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q = strchr (name, ' ');
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if (q)
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{
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*q = '\0';
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separator = name;
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name = q + 1;
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}
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if (! pika_environ_table_legal_name (name))
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{
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g_message (_("Illegal variable name in environment file %s: %s"),
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pika_file_get_utf8_name (file), name);
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g_free (buffer);
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continue;
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}
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if (! g_hash_table_lookup (environ_table->vars, name))
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{
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PikaEnvironValue *val = g_slice_new (PikaEnvironValue);
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val->value = pika_config_path_expand (value, FALSE, NULL);
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val->separator = g_strdup (separator);
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g_hash_table_insert (environ_table->vars, g_strdup (name), val);
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}
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g_free (buffer);
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}
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if (error)
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{
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g_message (_("Error reading '%s': %s"),
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pika_file_get_utf8_name (file),
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error->message);
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g_clear_error (&error);
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}
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g_object_unref (data_input);
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}
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static gboolean
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pika_environ_table_legal_name (gchar *name)
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{
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gchar *s;
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if (! g_ascii_isalpha (*name) && (*name != '_'))
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return FALSE;
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for (s = name + 1; *s; s++)
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if (! g_ascii_isalnum (*s) && (*s != '_'))
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return FALSE;
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return TRUE;
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}
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static void
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pika_environ_table_populate (PikaEnvironTable *environ_table)
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{
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gchar **env = g_listenv ();
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gchar **var;
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GPtrArray *env_array;
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var = env;
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env_array = g_ptr_array_new ();
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while (*var)
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{
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/* g_listenv() only returns the names of environment variables
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* that are correctly specified (name=value) in the environ
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* array (Unix) or the process environment string table (Win32).
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*/
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if (pika_environ_table_pass_through (environ_table, *var))
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g_ptr_array_add (env_array, g_strconcat (*var, "=", g_getenv (*var), NULL));
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var++;
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}
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g_strfreev (env);
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if (environ_table->vars)
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g_hash_table_foreach (environ_table->vars,
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(GHFunc) pika_environ_table_populate_one,
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env_array);
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if (environ_table->internal)
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g_hash_table_foreach (environ_table->internal,
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(GHFunc) pika_environ_table_populate_one,
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env_array);
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g_ptr_array_add (env_array, NULL);
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environ_table->envp = (gchar **) g_ptr_array_free (env_array, FALSE);
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#ifdef ENVP_DEBUG
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var = environ_table->envp;
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g_print ("PikaEnvironTable:\n");
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while (*var)
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{
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g_print ("%s\n", *var);
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var++;
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}
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#endif /* ENVP_DEBUG */
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}
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static void
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pika_environ_table_populate_one (const gchar *name,
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PikaEnvironValue *val,
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GPtrArray *env_array)
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{
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const gchar *old;
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gchar *var = NULL;
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if (val->separator)
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{
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old = g_getenv (name);
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if (old)
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var = g_strconcat (name, "=", val->value, val->separator, old, NULL);
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}
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if (! var)
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var = g_strconcat (name, "=", val->value, NULL);
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g_ptr_array_add (env_array, var);
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}
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static gboolean
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pika_environ_table_pass_through (PikaEnvironTable *environ_table,
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const gchar *name)
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{
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gboolean vars, internal;
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vars = environ_table->vars &&
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g_hash_table_lookup (environ_table->vars, name);
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internal = environ_table->internal &&
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g_hash_table_lookup (environ_table->internal, name);
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return (!vars && !internal);
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}
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static void
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pika_environ_table_clear_vars (PikaEnvironTable *environ_table)
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{
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if (environ_table->vars)
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{
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g_hash_table_destroy (environ_table->vars);
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environ_table->vars = NULL;
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}
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}
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static void
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pika_environ_table_clear_internal (PikaEnvironTable *environ_table)
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{
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if (environ_table->internal)
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{
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g_hash_table_destroy (environ_table->internal);
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environ_table->internal = NULL;
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}
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}
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static void
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pika_environ_table_clear_envp (PikaEnvironTable *environ_table)
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{
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if (environ_table->envp)
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{
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g_strfreev (environ_table->envp);
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environ_table->envp = NULL;
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}
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}
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static void
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pika_environ_table_free_value (PikaEnvironValue *val)
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{
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g_free (val->value);
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g_free (val->separator);
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g_slice_free (PikaEnvironValue, val);
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}
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