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trivial: Add fu_udev_device_seek() for future code

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This commit is contained in:
Richard Hughes 2021-11-04 14:45:31 +00:00
parent fe180cbf5d
commit 0fb2ef3aae
3 changed files with 54 additions and 0 deletions
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51
libfwupdplugin/fu-udev-device.c
View File

@ -1447,6 +1447,57 @@ fu_udev_device_pread_full(FuUdevDevice *self,
#endif
}
/**
* fu_udev_device_seek:
* @self: a #FuUdevDevice
* @offset: offset address
* @error: (nullable): optional return location for an error
*
* Seeks a file descriptor to a given offset.
*
* Returns: %TRUE for success
*
* Since: 1.7.2
**/
gboolean
fu_udev_device_seek(FuUdevDevice *self, goffset offset, GError **error)
{
FuUdevDevicePrivate *priv = GET_PRIVATE(self);
g_return_val_if_fail(FU_IS_UDEV_DEVICE(self), FALSE);
g_return_val_if_fail(error == NULL || *error == NULL, FALSE);
/* not open! */
if (priv->fd == 0) {
g_set_error(error,
FWUPD_ERROR,
FWUPD_ERROR_INTERNAL,
"%s [%s] has not been opened",
fu_device_get_id(FU_DEVICE(self)),
fu_device_get_name(FU_DEVICE(self)));
return FALSE;
}
#ifdef HAVE_PWRITE
if (lseek(priv->fd, offset, SEEK_SET) < 0) {
g_set_error(error,
G_IO_ERROR,
G_IO_ERROR_FAILED,
"failed to seek to 0x%04x: %s",
(guint)offset,
strerror(errno));
return FALSE;
}
return TRUE;
#else
g_set_error_literal(error,
FWUPD_ERROR,
FWUPD_ERROR_NOT_SUPPORTED,
"Not supported as lseek() is unavailable");
return FALSE;
#endif
}
/**
* fu_udev_device_pwrite_full:
* @self: a #FuUdevDevice

2
libfwupdplugin/fu-udev-device.h
View File

@ -113,6 +113,8 @@ fu_udev_device_pread_full(FuUdevDevice *self,
guint8 *buf,
gsize bufsz,
GError **error) G_GNUC_WARN_UNUSED_RESULT;
gboolean
fu_udev_device_seek(FuUdevDevice *self, goffset offset, GError **error) G_GNUC_WARN_UNUSED_RESULT;
const gchar *
fu_udev_device_get_sysfs_attr(FuUdevDevice *self, const gchar *attr, GError **error);
gboolean

1
libfwupdplugin/fwupdplugin.map
View File

@ -950,5 +950,6 @@ LIBFWUPDPLUGIN_1.7.2 {
global:
fu_context_has_hwid_flag;
fu_udev_device_get_sysfs_attr_uint64;
fu_udev_device_seek;
local: *;
} LIBFWUPDPLUGIN_1.7.1;