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hooks.c
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hooks.c
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/*
* This file is part of cc-oci-runtime.
*
* Copyright (C) 2016 Intel Corporation
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include "spec_handler.h"
#include "util.h"
#include "../src/oci-config.h"
static struct oci_cfg_hook* current_hook = NULL;
static bool error_detected = false;
static void
save_current_hook(GSList** hooks_list) {
if (! current_hook) {
return;
}
/* Required:
* - path
* Optional:
* - args
* - env
* - timeout
*/
if (! current_hook->path[0]) {
g_critical("missing hook path");
goto err;
}
*hooks_list = g_slist_append((*hooks_list), current_hook);
current_hook = NULL;
return;
err:
cc_oci_hook_free(current_hook);
error_detected = true;
current_hook = NULL;
}
static void
handle_hook(GNode* root, GSList** list) {
gchar* endptr = NULL;
if ((!root) || error_detected) {
return;
}
/* null separator */
if(!root->data) {
/* save current hook */
save_current_hook(list);
} else if (root->children) {
/* create a new hook and fill it */
if (!current_hook) {
current_hook = g_new0 (struct oci_cfg_hook, 1);
}
if (g_strcmp0(root->data, "path") == 0) {
g_snprintf(current_hook->path, sizeof(current_hook->path),
"%s", (char*)root->children->data);
} else if (g_strcmp0(root->data, "args") == 0) {
current_hook->args = node_to_strv(root);
} else if (g_strcmp0(root->data, "env") == 0) {
current_hook->env = node_to_strv(root);
} else if (g_strcmp0(root->data, "timeout") == 0) {
current_hook->timeout =
(gint)g_ascii_strtoll((char*)root->children->data, &endptr, 10);
if (endptr == root->children->data) {
g_critical("failed to convert '%s' to int",
(char*)root->children->data);
}
}
}
}
static void
handle_hooks_section(GNode* root, struct cc_oci_config* config) {
GSList** current_list = NULL;
if (! (root && root->children) || error_detected) {
return;
}
if (g_strcmp0(root->data, "prestart") == 0) {
current_list = &(config->oci.hooks.prestart);
} else if (g_strcmp0(root->data, "poststart") == 0) {
current_list = &(config->oci.hooks.poststart);
} else if (g_strcmp0(root->data, "poststop") == 0) {
current_list = &config->oci.hooks.poststop;
} else {
g_critical("Unknown hook: %s", (char*)root->data);
return;
}
g_node_children_foreach(root, G_TRAVERSE_ALL,
(GNodeForeachFunc)handle_hook, current_list);
/* save last hook */
save_current_hook(current_list);
}
static bool
hooks_handle_section(GNode* root, struct cc_oci_config* config) {
error_detected = false;
if (! root) {
g_critical("root node is NULL");
return false;
}
if (! config ) {
g_critical("oci config is NULL");
return false;
}
g_node_children_foreach(root, G_TRAVERSE_ALL,
(GNodeForeachFunc)handle_hooks_section, config);
return !error_detected;
}
struct spec_handler hooks_spec_handler = {
.name = "hooks",
.handle_section = hooks_handle_section
};