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fu-smbios.c: Add kenv support

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Signed-off-by: Norbert Kamiński <norbert.kaminski@3mdeb.com>
This commit is contained in:
Norbert Kamiński 2021-05-18 13:15:31 +02:00 committed by Richard Hughes
parent 99f40fa7a7
commit 80ba3f07f2
2 changed files with 123 additions and 0 deletions
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120
libfwupdplugin/fu-smbios.c
View File

@ -11,6 +11,10 @@
#include <gio/gio.h>
#include <string.h>
#ifdef HAVE_KENV_H
#include <kenv.h>
#endif
#include "fu-common.h"
#include "fu-smbios-private.h"
#include "fwupd-error.h"
@ -89,6 +93,117 @@ fu_smbios_convert_dt_string (FuSmbios *self, guint8 type, guint8 offset,
fu_smbios_convert_dt_value (self, type, offset, item->strings->len);
}
#ifdef HAVE_KENV_H
static void
fu_smbios_kenv_sysctl_string (FuSmbios *self, guint8 type, guint8 offset,
const gchar *buf, gsize bufsz)
{
FuSmbiosItem *item = g_ptr_array_index (self->items, type);
/* add to strtab */
g_ptr_array_add (item->strings, g_strndup (buf, bufsz));
fu_smbios_convert_dt_value (self, type, offset, item->strings->len);
}
static gboolean
fu_smbios_kenv_lookup (const gchar *sminfo, gchar *buf, gsize bufsz, GError **error)
{
if (kenv (KENV_GET, sminfo, buf, bufsz - 1) == -1) {
g_set_error (error,
FWUPD_ERROR,
FWUPD_ERROR_READ,
"cannot get DMI request for %s",
sminfo);
return FALSE;
}
return TRUE;
}
static gboolean
fu_smbios_convert_kenv_string (FuSmbios *self, guint8 type, guint8 offset,
const gchar *sminfo, GError **error)
{
gchar buf[128] = { '\0' }; /* maximum value length - 128 */
if (!fu_smbios_kenv_lookup (sminfo, buf, sizeof(buf), error))
return FALSE;
fu_smbios_kenv_sysctl_string (self, type, offset, buf, sizeof(buf));
return TRUE;
}
static gboolean
fu_smbios_setup_from_kenv (FuSmbios *self, GError **error)
{
gboolean is_valid = FALSE;
g_autoptr(GError) error_local = NULL;
/* add all four faked structures */
for (guint i = 0; i < FU_SMBIOS_STRUCTURE_TYPE_LAST; i++) {
FuSmbiosItem *item = g_new0 (FuSmbiosItem, 1);
item->type = i;
item->buf = g_byte_array_new ();
item->strings = g_ptr_array_new_with_free_func (g_free);
g_ptr_array_add (self->items, item);
}
/* DMI:Manufacturer */
if (!fu_smbios_convert_kenv_string (self, FU_SMBIOS_STRUCTURE_TYPE_SYSTEM,
0x04, "smbios.bios.vendor", &error_local)) {
g_debug ("ignoring: %s", error_local->message);
g_clear_error (&error_local);
} else {
is_valid = TRUE;
}
/* DMI:BiosVersion */
if (!fu_smbios_convert_kenv_string (self, FU_SMBIOS_STRUCTURE_TYPE_BIOS,
0x05, "smbios.bios.version", &error_local)) {
g_debug ("ignoring: %s", error_local->message);
g_clear_error (&error_local);
} else {
is_valid = TRUE;
}
/* DMI:Family */
if (!fu_smbios_convert_kenv_string (self, FU_SMBIOS_STRUCTURE_TYPE_SYSTEM,
0x1a, "smbios.system.family", &error_local)) {
g_debug ("ignoring: %s", error_local->message);
g_clear_error (&error_local);
} else {
is_valid = TRUE;
}
/* DMI:ProductName */
if (!fu_smbios_convert_kenv_string (self, FU_SMBIOS_STRUCTURE_TYPE_SYSTEM,
0x05, "smbios.planar.product", &error_local)) {
g_debug ("ignoring: %s", error_local->message);
g_clear_error (&error_local);
} else {
is_valid = TRUE;
}
/* DMI:BaseboardManufacturer */
if (!fu_smbios_convert_kenv_string (self, FU_SMBIOS_STRUCTURE_TYPE_BASEBOARD,
0x04, "smbios.planar.maker", &error_local)) {
g_debug ("ignoring: %s", error_local->message);
g_clear_error (&error_local);
} else {
is_valid = TRUE;
}
/* we got no data */
if (!is_valid) {
g_set_error (error,
FWUPD_ERROR,
FWUPD_ERROR_READ,
"no SMBIOS information provided");
return FALSE;
}
/* success */
return TRUE;
}
#endif
static gboolean
fu_smbios_setup_from_path_dt (FuSmbios *self, const gchar *path, GError **error)
{
@ -469,6 +584,11 @@ fu_smbios_setup (FuSmbios *self, GError **error)
if (g_file_test (path_dt, G_FILE_TEST_EXISTS))
return fu_smbios_setup_from_path (self, path_dt, error);
#ifdef HAVE_KENV_H
/* kenv */
return fu_smbios_setup_from_kenv (self, error);
#endif
/* neither found */
g_set_error_literal (error,
FWUPD_ERROR,

3
meson.build
View File

@ -318,6 +318,9 @@ endif
if cc.has_header('fnmatch.h')
conf.set('HAVE_FNMATCH_H', '1')
endif
if cc.has_header('kenv.h')
conf.set('HAVE_KENV_H', '1')
endif
if cc.has_header('malloc.h')
conf.set('HAVE_MALLOC_H', '1')
if cc.has_function('malloc_trim', prefix: '#include <malloc.h>')