hal/hald pstore.c,NONE,1.1 pstore.h,NONE,1.1
David Zeuthen
david at pdx.freedesktop.org
Sun Jun 20 07:05:14 PDT 2004
Update of /cvs/hal/hal/hald
In directory pdx:/tmp/cvs-serv21763
Added Files:
pstore.c pstore.h
Log Message:
Forgot to add pstore.[ch]
--- NEW FILE: pstore.c ---
/***************************************************************************
* CVSID: $Id: pstore.c,v 1.1 2004/06/20 14:05:12 david Exp $
*
* pstore.c : persistent property store on disk
*
* Copyright (C) 2004 Kay Sievers, <kay.sievers at vrfy.org>
*
* Licensed under the Academic Free License version 2.0
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
**************************************************************************/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include <sys/stat.h>
#include <glib.h>
#include "logger.h"
#include "pstore.h"
#define PSTR "String:"
#define PINT32 "Int32:"
#define PBOOL "Bool:"
#define PDOUBLE "Double:"
#define UDI_STRIP "/org/freedesktop/Hal"
static char *pstore_uuid = NULL;
struct _HalPStore {
char *path;
const char *uuid;
};
/** Create relative or absolute path.
*
*/
static int
create_path(const char *path)
{
char *p;
char *pos;
struct stat stats;
if (stat (path, &stats) == 0)
return 0;
p = g_strdup (path);
pos = strrchr (p, '/');
if (pos != NULL && pos != p) {
pos[0] = '\0';
create_path (p);
}
g_free (p);
return mkdir(path, 0755);
}
/** Return absolute filename with simplified udi string.
*
*/
static char
*build_path (HalPStore *pstore,
const char *udi, const char *file)
{
char *path;
const char *udi_s;
udi_s = udi;
/* strip namespace part of udi string */
if (udi != NULL &&
g_ascii_strncasecmp(udi, UDI_STRIP, sizeof(UDI_STRIP)-1) == 0)
udi_s = &udi[sizeof(UDI_STRIP)-1];
path = g_build_filename (G_DIR_SEPARATOR_S,
pstore->path, pstore->uuid,
udi_s, file, NULL);
return path;
}
/** Init pstore system by reading or generating our uuid.
*
*/
void
hal_pstore_init (const char *uuid_file)
{
char *uuid;
char hostname[HOST_NAME_MAX];
char *p;
GIOChannel *io;
GError *error = NULL;
int written;
g_file_get_contents (uuid_file, &uuid, NULL, NULL);
if (uuid == NULL) {
/* create new uuid and save it to disk */
gethostname (hostname, HOST_NAME_MAX);
uuid = g_strdup_printf ("%s-%lx", hostname, time(NULL));
p = g_path_get_dirname (uuid_file);
create_path(p);
g_free(p);
io = g_io_channel_new_file (uuid_file, "w", &error);
if (error != NULL) {
HAL_WARNING (("error creating file %s", error->message));
g_error_free (error);
return;
}
g_io_channel_write_chars (io, uuid, -1, &written, &error);
g_io_channel_shutdown (io, TRUE, NULL);
if (error != NULL) {
HAL_WARNING (("error writing to file %s", error->message));
g_error_free (error);
return;
}
}
HAL_DEBUG (("uuid is %s", uuid));
pstore_uuid = uuid;
}
/** Open pstore on the given location.
*
*/
HalPStore
*hal_pstore_open (const char *path)
{
HalPStore *pstore;
char *p;
g_return_val_if_fail (pstore_uuid != NULL, NULL);
g_return_val_if_fail (path != NULL, NULL);
pstore = g_new0 (HalPStore, 1);
pstore->path = g_strdup (path);
pstore->uuid = pstore_uuid;
p = g_build_path (G_DIR_SEPARATOR_S,
pstore->path, pstore->uuid, NULL);
create_path(p);
g_free(p);
HAL_DEBUG (("opened pstore at %s/%s/", pstore->path, pstore->uuid));
return pstore;
}
/** Turn around the OPEN sign, in the store's entrance :)
*
*/
void
hal_pstore_close (HalPStore *pstore)
{
g_return_if_fail (pstore != NULL);
g_free (pstore->path);
g_free (pstore);
}
/** Save a property value to the disk.
*
*/
void
hal_pstore_save_property (HalPStore *pstore,
HalDevice *device, HalProperty *prop)
{
char *path;
char *file;
GIOChannel *io;
GError *error = NULL;
char *id;
char *value;
char *buf;
int written;
g_return_if_fail (pstore != NULL);
g_return_if_fail (device != NULL);
g_return_if_fail (prop != NULL);
switch (hal_property_get_type (prop)) {
case DBUS_TYPE_STRING:
id = PSTR;
break;
case DBUS_TYPE_INT32:
id = PINT32;
break;
case DBUS_TYPE_BOOLEAN:
id = PBOOL;
break;
case DBUS_TYPE_DOUBLE:
id = PDOUBLE;
break;
default:
HAL_WARNING (("unknown property type %s",
hal_property_get_key (prop)));
return;
}
path = build_path (pstore, hal_device_get_udi (device), NULL);
create_path(path);
g_free(path);
file = build_path (pstore,
hal_device_get_udi (device),
hal_property_get_key (prop));
io = g_io_channel_new_file (file, "w", &error);
if (error != NULL) {
HAL_WARNING (("error creating file %s (%s)", file, error->message));
g_error_free (error);
g_free (file);
return;
}
value = hal_property_to_string (prop);
buf = g_strconcat (id, value, NULL);
g_free (value);
HAL_DEBUG (("write %s to disk", hal_property_get_key (prop)));
g_io_channel_write_chars (io, buf, -1, &written, &error);
if (error != NULL) {
HAL_WARNING (("error writing to file %s (%s)", file, error->message));
g_error_free (error);
}
g_io_channel_shutdown (io, TRUE, NULL);
g_free (buf);
g_free (file);
}
/** Load a stored property value from the disk.
*
*/
void
hal_pstore_load_property (HalPStore *pstore,
HalDevice *device, const char *key)
{
char *file;
char *buf;
char *str;
int i;
double d;
g_return_if_fail (pstore != NULL);
g_return_if_fail (device != NULL);
g_return_if_fail (key != NULL);
file = build_path (pstore, hal_device_get_udi (device), key);
g_file_get_contents (file, &buf, NULL, NULL);
g_free (file);
if (buf == NULL) {
HAL_DEBUG (("error reading file %s", file));
return;
}
if (g_ascii_strncasecmp (buf, PSTR, sizeof (PSTR)-1) == 0) {
str = &buf[sizeof (PSTR)-1];
hal_device_property_set_string (device, key, str);
HAL_INFO (("STRING %s read for %s", str, key));
goto exit;
}
if (g_ascii_strncasecmp (buf, PINT32, sizeof (PINT32)-1) == 0) {
str = &buf[sizeof (PINT32)-1];
i = strtol (str, NULL, 10);
hal_device_property_set_int (device, key, i);
goto exit;
}
if (g_ascii_strncasecmp (buf, PBOOL, sizeof (PBOOL)-1) == 0) {
str = &buf[sizeof (PBOOL)-1];
if (g_ascii_strcasecmp (str, "true") == 0)
i = TRUE;
else
i = FALSE;
hal_device_property_set_bool (device, key, i);
goto exit;
}
if (g_ascii_strncasecmp (buf, PDOUBLE, sizeof (PDOUBLE)-1) == 0) {
str = &buf[sizeof (PDOUBLE)-1];
d = atof (str);
hal_device_property_set_double (device, key, d);
goto exit;
}
HAL_WARNING (("error determining pstore property type %s", key));
exit:
g_free (buf);
}
/** Delete a stored property from the disk.
*
*/
void
hal_pstore_delete_property (HalPStore *pstore,
HalDevice *device, HalProperty *prop)
{
char *file;
g_return_if_fail (pstore != NULL);
g_return_if_fail (device != NULL);
g_return_if_fail (prop != NULL);
file = build_path (pstore,
hal_device_get_udi (device),
hal_property_get_key (prop));
HAL_DEBUG (("unlinking %s", file));
unlink(file);
g_free(file);
}
/** Load all stored properties of a device from the disk.
*
*/
void
hal_pstore_load_device (HalPStore *pstore,
HalDevice *device)
{
GDir *dir;
GError *error = NULL;
const char *dirname;
char *path;
g_return_if_fail (pstore != NULL);
g_return_if_fail (device != NULL);
path = build_path (pstore,
hal_device_get_udi (device),
NULL);
HAL_DEBUG (("reading directory %s", path));
dir = g_dir_open (path, 0, &error);
if (error)
goto exit;
while (1) {
dirname = g_dir_read_name (dir);
if (dirname == NULL)
break;
hal_pstore_load_property (pstore, device, dirname);
}
g_dir_close (dir);
exit:
g_free (path);
}
--- NEW FILE: pstore.h ---
/***************************************************************************
* CVSID: $Id: pstore.h,v 1.1 2004/06/20 14:05:12 david Exp $
*
* pstore.h : persistent property store on disk
*
* Copyright (C) 2004 Kay Sievers, <kay.sievers at vrfy.org>
*
* Licensed under the Academic Free License version 2.0
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
**************************************************************************/
#ifndef PSTORE_H
#define PSTORE_H
#include "device.h"
#include "property.h"
typedef struct _HalPStore HalPStore;
void hal_pstore_init (const char *path);
HalPStore *hal_pstore_open (const char *path);
void hal_pstore_close (HalPStore *pstore);
void hal_pstore_save_property (HalPStore *pstore,
HalDevice *device,
HalProperty *prop);
void hal_pstore_load_property (HalPStore *pstore,
HalDevice *device,
const char *key);
void hal_pstore_delete_property (HalPStore *pstore,
HalDevice *device,
HalProperty *prop);
void hal_pstore_load_device (HalPStore *pstore,
HalDevice *device);
#endif /* PSTORE_H */
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