path: root/lib/libalpm/trans.c

/*
 *  trans.c
 *
 *  Copyright (c) 2002-2007 by Judd Vinet <jvinet@zeroflux.org>
 *  Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
 *  Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
 *  Copyright (c) 2005, 2006 by Miklos Vajna <vmiklos@frugalware.org>
 *
 *  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, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <unistd.h>
#include <errno.h>

/* libalpm */
#include "trans.h"
#include "alpm_list.h"
#include "package.h"
#include "util.h"
#include "log.h"
#include "handle.h"
#include "add.h"
#include "remove.h"
#include "sync.h"
#include "alpm.h"
#include "deps.h"
#include "cache.h"

/** \addtogroup alpm_trans Transaction Functions
 * @brief Functions to manipulate libalpm transactions
 * @{
 */

/** Initialize the transaction.
 * @param type type of the transaction
 * @param flags flags of the transaction (like nodeps, etc)
 * @param event event callback function pointer
 * @param conv question callback function pointer
 * @param progress progress callback function pointer
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int SYMEXPORT alpm_trans_init(pmtranstype_t type, pmtransflag_t flags,
                              alpm_trans_cb_event event, alpm_trans_cb_conv conv,
                              alpm_trans_cb_progress progress)
{
  ALPM_LOG_FUNC;

  /* Sanity checks */
  ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));

  ASSERT(handle->trans == NULL, RET_ERR(PM_ERR_TRANS_NOT_NULL, -1));

  /* lock db */
  handle->lckfd = _alpm_lckmk();
  if(handle->lckfd == -1) {
    RET_ERR(PM_ERR_HANDLE_LOCK, -1);
  }

  handle->trans = _alpm_trans_new();
  if(handle->trans == NULL) {
    RET_ERR(PM_ERR_MEMORY, -1);
  }

  return(_alpm_trans_init(handle->trans, type, flags, event, conv, progress));
}

/** Search for packages to upgrade and add them to the transaction.
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int SYMEXPORT alpm_trans_sysupgrade()
{
  pmtrans_t *trans;

  ALPM_LOG_FUNC;

  ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));

  trans = handle->trans;
  ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
  ASSERT(trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1));
  ASSERT(trans->type == PM_TRANS_TYPE_SYNC, RET_ERR(PM_ERR_TRANS_TYPE, -1));

  return(_alpm_trans_sysupgrade(trans));
}

/** Add a target to the transaction.
 * @param target the name of the target to add
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int SYMEXPORT alpm_trans_addtarget(char *target)
{
  pmtrans_t *trans;

  ALPM_LOG_FUNC;

  /* Sanity checks */
  ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
  ASSERT(target != NULL && strlen(target) != 0, RET_ERR(PM_ERR_WRONG_ARGS, -1));

  trans = handle->trans;
  ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
  ASSERT(trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1));

  return(_alpm_trans_addtarget(trans, target));
}

/** Prepare a transaction.
 * @param data the address of an alpm_list where detailed description
 * of an error can be dumped (ie. list of conflicting files)
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int SYMEXPORT alpm_trans_prepare(alpm_list_t **data)
{
  ALPM_LOG_FUNC;

  /* Sanity checks */
  ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
  ASSERT(data != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));

  ASSERT(handle->trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
  ASSERT(handle->trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1));

  return(_alpm_trans_prepare(handle->trans, data));
}

/** Commit a transaction.
 * @param data the address of an alpm_list where detailed description
 * of an error can be dumped (ie. list of conflicting files)
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int SYMEXPORT alpm_trans_commit(alpm_list_t **data)
{
  ALPM_LOG_FUNC;

  /* Sanity checks */
  ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));

  ASSERT(handle->trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
  ASSERT(handle->trans->state == STATE_PREPARED, RET_ERR(PM_ERR_TRANS_NOT_PREPARED, -1));

  return(_alpm_trans_commit(handle->trans, data));
}