static void
_ostree_bootloader_syslinux_finalize (GObject *object)
{
OstreeBootloaderSyslinux *self = OSTREE_BOOTLOADER_SYSLINUX (object);
g_clear_object (&self->sysroot);
G_OBJECT_CLASS (_ostree_bootloader_syslinux_parent_class)->finalize (object);
}
static gboolean
_ostree_bootloader_syslinux_query (OstreeBootloader *bootloader,
gboolean *out_is_active,
GCancellable *cancellable,
GError **error)
{
OstreeBootloaderSyslinux *self = OSTREE_BOOTLOADER_SYSLINUX (bootloader);
*out_is_active = g_file_query_file_type (self->config_path, G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS, NULL) == G_FILE_TYPE_SYMBOLIC_LINK;
return TRUE;
}
static gboolean
_ostree_bootloader_syslinux_query (OstreeBootloader *bootloader,
gboolean *out_is_active,
GCancellable *cancellable,
GError **error)
{
OstreeBootloaderSyslinux *self = OSTREE_BOOTLOADER_SYSLINUX (bootloader);
struct stat stbuf;
if (!glnx_fstatat_allow_noent (self->sysroot->sysroot_fd, syslinux_config_path, &stbuf, AT_SYMLINK_NOFOLLOW, error))
return FALSE;
*out_is_active = (errno == 0);
return TRUE;
}
static gboolean
_ostree_bootloader_syslinux_write_config (OstreeBootloader *bootloader,
int bootversion,
GCancellable *cancellable,
GError **error)
{
OstreeBootloaderSyslinux *self = OSTREE_BOOTLOADER_SYSLINUX (bootloader);
g_autofree char *new_config_path =
g_strdup_printf ("boot/loader.%d/syslinux.cfg", bootversion);
/* This should follow the symbolic link to the current bootversion. */
g_autofree char *config_contents =
glnx_file_get_contents_utf8_at (self->sysroot->sysroot_fd, syslinux_config_path, NULL,
cancellable, error);
if (!config_contents)
return FALSE;
g_auto(GStrv) lines = g_strsplit (config_contents, "\n", -1);
g_autoptr(GPtrArray) new_lines = g_ptr_array_new_with_free_func (g_free);
g_autoptr(GPtrArray) tmp_lines = g_ptr_array_new_with_free_func (g_free);
g_autofree char *kernel_arg = NULL;
gboolean saw_default = FALSE;
gboolean regenerate_default = FALSE;
gboolean parsing_label = FALSE;
/* Note special iteration condition here; we want to also loop one
* more time at the end where line = NULL to ensure we finish off
* processing the last LABEL.
*/
for (char **iter = lines; iter; iter++)
{
const char *line = *iter;
gboolean skip = FALSE;
if (parsing_label &&
(line == NULL || !g_str_has_prefix (line, "\t")))
{
parsing_label = FALSE;
if (kernel_arg == NULL)
return glnx_throw (error, "No KERNEL argument found after LABEL");
/* If this is a non-ostree kernel, just emit the lines
* we saw.
*/
if (!g_str_has_prefix (kernel_arg, "/ostree/"))
{
for (guint i = 0; i < tmp_lines->len; i++)
{
g_ptr_array_add (new_lines, tmp_lines->pdata[i]);
tmp_lines->pdata[i] = NULL; /* Transfer ownership */
}
}
else
{
/* Otherwise, we drop the config on the floor - it
* will be regenerated.
*/
g_ptr_array_set_size (tmp_lines, 0);
}
}
if (line == NULL)
break;
if (!parsing_label &&
(g_str_has_prefix (line, "LABEL ")))
{
parsing_label = TRUE;
g_ptr_array_set_size (tmp_lines, 0);
}
else if (parsing_label && g_str_has_prefix (line, "\tKERNEL "))
{
g_free (kernel_arg);
kernel_arg = g_strdup (line + strlen ("\tKERNEL "));
}
else if (!parsing_label &&
(g_str_has_prefix (line, "DEFAULT ")))
{
saw_default = TRUE;
/* XXX Searching for patterns in the title is rather brittle,
* but this hack is at least noted in the code that builds
* the title to hopefully avoid regressions. */
if (g_str_has_prefix (line, "DEFAULT ostree:") || /* old format */
strstr (line, "(ostree") != NULL) /* new format */
regenerate_default = TRUE;
skip = TRUE;
}
if (!skip)
{
if (parsing_label)
g_ptr_array_add (tmp_lines, g_strdup (line));
else
g_ptr_array_add (new_lines, g_strdup (line));
}
}
if (!saw_default)
regenerate_default = TRUE;
if (!append_config_from_loader_entries (self, regenerate_default,
bootversion, new_lines,
cancellable, error))
return FALSE;
g_autofree char *new_config_contents = _ostree_sysroot_join_lines (new_lines);
if (!glnx_file_replace_contents_at (self->sysroot->sysroot_fd, new_config_path,
(guint8*)new_config_contents, strlen (new_config_contents),
GLNX_FILE_REPLACE_DATASYNC_NEW,
cancellable, error))
return FALSE;
return TRUE;
}
static gboolean
_ostree_bootloader_syslinux_write_config (OstreeBootloader *bootloader,
int bootversion,
GCancellable *cancellable,
GError **error)
{
gboolean ret = FALSE;
OstreeBootloaderSyslinux *self = OSTREE_BOOTLOADER_SYSLINUX (bootloader);
gs_unref_object GFile *new_config_path = NULL;
gs_free char *config_contents = NULL;
gs_free char *new_config_contents = NULL;
gs_unref_ptrarray GPtrArray *new_lines = NULL;
gs_unref_ptrarray GPtrArray *tmp_lines = NULL;
gs_free char *kernel_arg = NULL;
gboolean saw_default = FALSE;
gboolean regenerate_default = FALSE;
gboolean parsing_label = FALSE;
char **lines = NULL;
char **iter;
guint i;
new_config_path = ot_gfile_resolve_path_printf (self->sysroot->path, "boot/loader.%d/syslinux.cfg",
bootversion);
/* This should follow the symbolic link to the current bootversion. */
config_contents = gs_file_load_contents_utf8 (self->config_path, cancellable, error);
if (!config_contents)
goto out;
lines = g_strsplit (config_contents, "\n", -1);
new_lines = g_ptr_array_new_with_free_func (g_free);
tmp_lines = g_ptr_array_new_with_free_func (g_free);
/* Note special iteration condition here; we want to also loop one
* more time at the end where line = NULL to ensure we finish off
* processing the last LABEL.
*/
iter = lines;
while (TRUE)
{
char *line = *iter;
gboolean skip = FALSE;
if (parsing_label &&
(line == NULL || !g_str_has_prefix (line, "\t")))
{
parsing_label = FALSE;
if (kernel_arg == NULL)
{
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"No KERNEL argument found after LABEL");
goto out;
}
/* If this is a non-ostree kernel, just emit the lines
* we saw.
*/
if (!g_str_has_prefix (kernel_arg, "/ostree/"))
{
for (i = 0; i < tmp_lines->len; i++)
{
g_ptr_array_add (new_lines, tmp_lines->pdata[i]);
tmp_lines->pdata[i] = NULL; /* Transfer ownership */
}
}
else
{
/* Otherwise, we drop the config on the floor - it
* will be regenerated.
*/
g_ptr_array_set_size (tmp_lines, 0);
}
}
if (line == NULL)
break;
if (!parsing_label &&
(g_str_has_prefix (line, "LABEL ")))
{
parsing_label = TRUE;
g_ptr_array_set_size (tmp_lines, 0);
}
else if (parsing_label && g_str_has_prefix (line, "\tKERNEL "))
{
g_free (kernel_arg);
kernel_arg = g_strdup (line + strlen ("\tKERNEL "));
}
else if (!parsing_label &&
(g_str_has_prefix (line, "DEFAULT ")))
{
saw_default = TRUE;
/* XXX Searching for patterns in the title is rather brittle,
* but this hack is at least noted in the code that builds
* the title to hopefully avoid regressions. */
if (g_str_has_prefix (line, "DEFAULT ostree:") || /* old format */
strstr (line, "(ostree") != NULL) /* new format */
{
regenerate_default = TRUE;
}
skip = TRUE;
}
if (skip)
{
g_free (line);
}
else
{
if (parsing_label)
{
g_ptr_array_add (tmp_lines, line);
}
else
{
g_ptr_array_add (new_lines, line);
}
}
/* Transfer ownership */
*iter = NULL;
iter++;
}
if (!saw_default)
regenerate_default = TRUE;
if (!append_config_from_boostree_loader_entries (self, regenerate_default,
bootversion, new_lines,
cancellable, error))
goto out;
new_config_contents = _ostree_sysroot_join_lines (new_lines);
{
gs_unref_bytes GBytes *new_config_contents_bytes =
g_bytes_new_static (new_config_contents,
strlen (new_config_contents));
if (!ot_gfile_replace_contents_fsync (new_config_path, new_config_contents_bytes,
cancellable, error))
goto out;
}
ret = TRUE;
out:
g_free (lines); /* Note we freed elements individually */
return ret;
}
