~ubuntu-branches/debian/stretch/lvm2/stretch

/*

 * Copyright (C) 2008-2013 Red Hat, Inc. All rights reserved.

 *

 * This file is part of LVM2.

 *

 * This copyrighted material is made available to anyone wishing to use,

 * modify, copy, or redistribute it subject to the terms and conditions

 * of the GNU Lesser General Public License v.2.1.

 *

 * You should have received a copy of the GNU Lesser 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

 */

#include "lib.h"

#include "properties.h"

#include "lvm_misc.h"

#include "lvm2app.h"

#include "lvm_prop.h"

struct dm_list *tag_list_copy(struct dm_pool *p, struct dm_list *tag_list)

{

	struct dm_list *list;

	lvm_str_list_t *lsl;

	struct dm_str_list *sl;

	if (!(list = dm_pool_zalloc(p, sizeof(*list)))) {

		log_errno(ENOMEM, "Memory allocation fail for dm_list.");

		return NULL;

	}

	dm_list_init(list);

	dm_list_iterate_items(sl, tag_list) {

		if (!(lsl = dm_pool_zalloc(p, sizeof(*lsl)))) {

			log_errno(ENOMEM,

				"Memory allocation fail for lvm_lv_list.");

			return NULL;

		}

		if (!(lsl->str = dm_pool_strdup(p, sl->str))) {

			log_errno(ENOMEM,

				"Memory allocation fail for lvm_lv_list->str.");

			return NULL;

		}

		dm_list_add(list, &lsl->list);

	}

	return list;

}

struct lvm_property_value get_property(const pv_t pv, const vg_t vg,

				       const lv_t lv,

				       const lvseg_t lvseg,

				       const pvseg_t pvseg,

				       const struct lvcreate_params *lvcp,

				       const struct pvcreate_params *pvcp,

				       const char *name)

{

	struct lvm_property_type prop;

	struct lvm_property_value v = { 0 };

	prop.id = name;

	if (pv) {

		if (!pv_get_property(pv, &prop))

			return v;

	} else if (vg) {

		if (!vg_get_property(vg, &prop))

			return v;

	} else if (lv) {

		if (!lv_get_property(lv, &prop))

			return v;

	} else if (lvseg) {

		if (!lvseg_get_property(lvseg, &prop))

			return v;

	} else if (pvseg) {

		if (!pvseg_get_property(pvseg, &prop))

			return v;

	} else if (lvcp) {

		if (!lv_create_param_get_property(lvcp, &prop))

			return v;

	} else if (pvcp) {

		if (!pv_create_param_get_property(pvcp, &prop))

			return v;

	} else {

		log_errno(EINVAL, "Invalid NULL handle passed to library function.");

		return v;

	}

	v.is_settable = prop.is_settable;

	v.is_string = prop.is_string;

	v.is_integer = prop.is_integer;

	if (v.is_string)

		v.value.string = prop.value.string;

	if (v.is_integer)

		v.value.integer = prop.value.integer;

	v.is_valid = 1;

	return v;

}

int set_property(const pv_t pv, const vg_t vg, const lv_t lv,

		struct lvcreate_params *lvcp,

		struct pvcreate_params *pvcp,

		const char *name,

		struct lvm_property_value *v)

{

	struct lvm_property_type prop;

	prop.id = name;

	if (v->is_string)

		prop.value.string = v->value.string;

	else

		prop.value.integer = v->value.integer;

	if (pv) {

		if (!pv_set_property(pv, &prop)) {

			v->is_valid = 0;

			return -1;

		}

	} else if (vg) {

		if (!vg_set_property(vg, &prop)) {

			v->is_valid = 0;

			return -1;

		}

	} else if (lv) {

		if (!lv_set_property(lv, &prop)) {

			v->is_valid = 0;

			return -1;

		}

	} else if (lvcp) {

		if (!lv_create_param_set_property(lvcp, &prop)) {

			v->is_valid = 0;

			return -1;

		}

	} else if (pvcp) {

		if (!pv_create_param_set_property(pvcp, &prop)) {

			v->is_valid = 0;

			return -1;

		}

	} else {

		return -1;

	}

	return 0;

}

/*

 * Store anything that may need to be restored back to the user on library

 * call exit.  Currently the only thing we are preserving is the users umask.

 */

struct saved_env store_user_env(struct cmd_context *cmd)

{

	struct saved_env env = {0};

	if (cmd) {

		env.user_umask = umask(cmd->default_settings.umask);

	} else {

		env.user_umask = umask(0);

		umask(env.user_umask);

	}

	return env;

}

void restore_user_env(const struct saved_env *env)

{

	if (env) {

		umask(env->user_umask);

	}

}