PIKApp/app/plug-in/pikaenvirontable.c

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2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pikaenvirontable.c
* (C) 2002 Manish Singh <yosh@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 <string.h>
#include <gio/gio.h>
#include "libpikabase/pikabase.h"
#include "libpikaconfig/pikaconfig.h"
#include "plug-in-types.h"
#include "pikaenvirontable.h"
#include "pika-intl.h"
typedef struct _PikaEnvironValue PikaEnvironValue;
struct _PikaEnvironValue
{
gchar *value;
gchar *separator;
};
static void pika_environ_table_finalize (GObject *object);
static void pika_environ_table_load_env_file (PikaEnvironTable *environ_table,
GFile *file);
static gboolean pika_environ_table_legal_name (gchar *name);
static void pika_environ_table_populate (PikaEnvironTable *environ_table);
static void pika_environ_table_populate_one (const gchar *name,
PikaEnvironValue *val,
GPtrArray *env_array);
static gboolean pika_environ_table_pass_through (PikaEnvironTable *environ_table,
const gchar *name);
static void pika_environ_table_clear_vars (PikaEnvironTable *environ_table);
static void pika_environ_table_clear_internal (PikaEnvironTable *environ_table);
static void pika_environ_table_clear_envp (PikaEnvironTable *environ_table);
static void pika_environ_table_free_value (PikaEnvironValue *val);
G_DEFINE_TYPE (PikaEnvironTable, pika_environ_table, G_TYPE_OBJECT)
#define parent_class pika_environ_table_parent_class
static void
pika_environ_table_class_init (PikaEnvironTableClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->finalize = pika_environ_table_finalize;
}
static void
pika_environ_table_init (PikaEnvironTable *environ_table)
{
}
static void
pika_environ_table_finalize (GObject *object)
{
PikaEnvironTable *environ_table = PIKA_ENVIRON_TABLE (object);
pika_environ_table_clear_all (environ_table);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
PikaEnvironTable *
pika_environ_table_new (gboolean verbose)
{
PikaEnvironTable *table = g_object_new (PIKA_TYPE_ENVIRON_TABLE, NULL);
table->verbose = verbose;
return table;
}
static guint
pika_environ_table_str_hash (gconstpointer v)
{
#ifdef G_OS_WIN32
gchar *p = g_ascii_strup ((const gchar *) v, -1);
guint retval = g_str_hash (p);
g_free (p);
return retval;
#else
return g_str_hash (v);
#endif
}
static gboolean
pika_environ_table_str_equal (gconstpointer v1,
gconstpointer v2)
{
#ifdef G_OS_WIN32
gchar *string1 = g_ascii_strup ((const gchar *) v1, -1);
gchar *string2 = g_ascii_strup ((const gchar *) v2, -1);
gboolean retval = g_str_equal (string1, string2);
g_free (string1);
g_free (string2);
return retval;
#else
return g_str_equal (v1, v2);
#endif
}
void
pika_environ_table_load (PikaEnvironTable *environ_table,
GList *path)
{
GList *list;
g_return_if_fail (PIKA_IS_ENVIRON_TABLE (environ_table));
pika_environ_table_clear (environ_table);
environ_table->vars =
g_hash_table_new_full (pika_environ_table_str_hash,
pika_environ_table_str_equal,
g_free,
(GDestroyNotify) pika_environ_table_free_value);
for (list = path; list; list = g_list_next (list))
{
GFile *dir = list->data;
GFileEnumerator *enumerator;
enumerator =
g_file_enumerate_children (dir,
G_FILE_ATTRIBUTE_STANDARD_NAME ","
G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN ","
G_FILE_ATTRIBUTE_STANDARD_TYPE,
G_FILE_QUERY_INFO_NONE,
NULL, NULL);
if (enumerator)
{
GFileInfo *info;
while ((info = g_file_enumerator_next_file (enumerator,
NULL, NULL)))
{
if (! g_file_info_get_is_hidden (info) &&
g_file_info_get_file_type (info) == G_FILE_TYPE_REGULAR)
{
GFile *file = g_file_enumerator_get_child (enumerator, info);
pika_environ_table_load_env_file (environ_table, file);
g_object_unref (file);
}
g_object_unref (info);
}
g_object_unref (enumerator);
}
}
}
void
pika_environ_table_add (PikaEnvironTable *environ_table,
const gchar *name,
const gchar *value,
const gchar *separator)
{
PikaEnvironValue *val;
g_return_if_fail (PIKA_IS_ENVIRON_TABLE (environ_table));
pika_environ_table_clear_envp (environ_table);
if (! environ_table->internal)
environ_table->internal =
g_hash_table_new_full (g_str_hash, g_str_equal,
g_free,
(GDestroyNotify) pika_environ_table_free_value);
val = g_slice_new (PikaEnvironValue);
val->value = g_strdup (value);
val->separator = g_strdup (separator);
g_hash_table_insert (environ_table->internal, g_strdup (name), val);
}
void
pika_environ_table_remove (PikaEnvironTable *environ_table,
const gchar *name)
{
g_return_if_fail (PIKA_IS_ENVIRON_TABLE (environ_table));
if (! environ_table->internal)
return;
pika_environ_table_clear_envp (environ_table);
g_hash_table_remove (environ_table->internal, name);
if (g_hash_table_size (environ_table->internal) == 0)
pika_environ_table_clear_internal (environ_table);
}
void
pika_environ_table_clear (PikaEnvironTable *environ_table)
{
g_return_if_fail (PIKA_IS_ENVIRON_TABLE (environ_table));
pika_environ_table_clear_envp (environ_table);
pika_environ_table_clear_vars (environ_table);
}
void
pika_environ_table_clear_all (PikaEnvironTable *environ_table)
{
g_return_if_fail (PIKA_IS_ENVIRON_TABLE (environ_table));
pika_environ_table_clear_envp (environ_table);
pika_environ_table_clear_vars (environ_table);
pika_environ_table_clear_internal (environ_table);
}
gchar **
pika_environ_table_get_envp (PikaEnvironTable *environ_table)
{
g_return_val_if_fail (PIKA_IS_ENVIRON_TABLE (environ_table), NULL);
/* Hmm.. should we return a copy here in the future? Not thread safe atm,
* but the rest of it isn't either.
*/
if (! environ_table->envp)
pika_environ_table_populate (environ_table);
return environ_table->envp;
}
/* private */
static void
pika_environ_table_load_env_file (PikaEnvironTable *environ_table,
GFile *file)
{
GInputStream *input;
GDataInputStream *data_input;
gchar *buffer;
gsize buffer_len;
GError *error = NULL;
if (environ_table->verbose)
g_print ("Parsing '%s'\n", pika_file_get_utf8_name (file));
input = G_INPUT_STREAM (g_file_read (file, NULL, &error));
if (! input)
{
g_message (_("Could not open '%s' for reading: %s"),
pika_file_get_utf8_name (file),
error->message);
g_clear_error (&error);
return;
}
data_input = g_data_input_stream_new (input);
g_object_unref (input);
while ((buffer = g_data_input_stream_read_line (data_input, &buffer_len,
NULL, &error)))
{
gchar *name;
gchar *value;
gchar *separator;
gchar *p;
gchar *q;
/* Skip comments */
if (buffer[0] == '#')
{
g_free (buffer);
continue;
}
p = strchr (buffer, '=');
if (! p)
{
g_free (buffer);
continue;
}
*p = '\0';
name = buffer;
value = p + 1;
if (name[0] == '\0')
{
g_message (_("Empty variable name in environment file %s"),
pika_file_get_utf8_name (file));
g_free (buffer);
continue;
}
separator = NULL;
q = strchr (name, ' ');
if (q)
{
*q = '\0';
separator = name;
name = q + 1;
}
if (! pika_environ_table_legal_name (name))
{
g_message (_("Illegal variable name in environment file %s: %s"),
pika_file_get_utf8_name (file), name);
g_free (buffer);
continue;
}
if (! g_hash_table_lookup (environ_table->vars, name))
{
PikaEnvironValue *val = g_slice_new (PikaEnvironValue);
val->value = pika_config_path_expand (value, FALSE, NULL);
val->separator = g_strdup (separator);
g_hash_table_insert (environ_table->vars, g_strdup (name), val);
}
g_free (buffer);
}
if (error)
{
g_message (_("Error reading '%s': %s"),
pika_file_get_utf8_name (file),
error->message);
g_clear_error (&error);
}
g_object_unref (data_input);
}
static gboolean
pika_environ_table_legal_name (gchar *name)
{
gchar *s;
if (! g_ascii_isalpha (*name) && (*name != '_'))
return FALSE;
for (s = name + 1; *s; s++)
if (! g_ascii_isalnum (*s) && (*s != '_'))
return FALSE;
return TRUE;
}
static void
pika_environ_table_populate (PikaEnvironTable *environ_table)
{
gchar **env = g_listenv ();
gchar **var;
GPtrArray *env_array;
var = env;
env_array = g_ptr_array_new ();
while (*var)
{
/* g_listenv() only returns the names of environment variables
* that are correctly specified (name=value) in the environ
* array (Unix) or the process environment string table (Win32).
*/
if (pika_environ_table_pass_through (environ_table, *var))
g_ptr_array_add (env_array, g_strconcat (*var, "=", g_getenv (*var), NULL));
var++;
}
g_strfreev (env);
if (environ_table->vars)
g_hash_table_foreach (environ_table->vars,
(GHFunc) pika_environ_table_populate_one,
env_array);
if (environ_table->internal)
g_hash_table_foreach (environ_table->internal,
(GHFunc) pika_environ_table_populate_one,
env_array);
g_ptr_array_add (env_array, NULL);
environ_table->envp = (gchar **) g_ptr_array_free (env_array, FALSE);
#ifdef ENVP_DEBUG
var = environ_table->envp;
g_print ("PikaEnvironTable:\n");
while (*var)
{
g_print ("%s\n", *var);
var++;
}
#endif /* ENVP_DEBUG */
}
static void
pika_environ_table_populate_one (const gchar *name,
PikaEnvironValue *val,
GPtrArray *env_array)
{
const gchar *old;
gchar *var = NULL;
if (val->separator)
{
old = g_getenv (name);
if (old)
var = g_strconcat (name, "=", val->value, val->separator, old, NULL);
}
if (! var)
var = g_strconcat (name, "=", val->value, NULL);
g_ptr_array_add (env_array, var);
}
static gboolean
pika_environ_table_pass_through (PikaEnvironTable *environ_table,
const gchar *name)
{
gboolean vars, internal;
vars = environ_table->vars &&
g_hash_table_lookup (environ_table->vars, name);
internal = environ_table->internal &&
g_hash_table_lookup (environ_table->internal, name);
return (!vars && !internal);
}
static void
pika_environ_table_clear_vars (PikaEnvironTable *environ_table)
{
if (environ_table->vars)
{
g_hash_table_destroy (environ_table->vars);
environ_table->vars = NULL;
}
}
static void
pika_environ_table_clear_internal (PikaEnvironTable *environ_table)
{
if (environ_table->internal)
{
g_hash_table_destroy (environ_table->internal);
environ_table->internal = NULL;
}
}
static void
pika_environ_table_clear_envp (PikaEnvironTable *environ_table)
{
if (environ_table->envp)
{
g_strfreev (environ_table->envp);
environ_table->envp = NULL;
}
}
static void
pika_environ_table_free_value (PikaEnvironValue *val)
{
g_free (val->value);
g_free (val->separator);
g_slice_free (PikaEnvironValue, val);
}