xbps/lib/pkgdb.c

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/*-
* Copyright (c) 2012 Juan Romero Pardines.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "xbps_api_impl.h"
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/**
* @file lib/pkgdb.c
* @brief Package database handling routines
* @defgroup pkgdb Package database handling functions
*
* Functions to manipulate the main package database plist file (pkgdb).
*
* The following image shown below shows the proplib structure used
* by the main package database plist:
*
* @image html images/xbps_pkgdb_array.png
*
* Legend:
* - <b>Salmon filled box</b>: \a XBPS_PKGDB file internalized.
* - <b>White filled box</b>: mandatory objects.
* - <b>Grey filled box</b>: optional objects.
* - <b>Green filled box</b>: possible value set in the object, only one
* of them is set.
*
* Text inside of white boxes are the key associated with the object, its
* data type is specified on its edge, i.e array, bool, integer, string,
* dictionary.
*/
int HIDDEN
xbps_pkgdb_init(struct xbps_handle *xhp)
{
int rv;
assert(xhp != NULL);
if (xhp->pkgdb != NULL)
return 0;
if ((rv = xbps_pkgdb_update(xhp, false)) != 0) {
if (rv != ENOENT)
xbps_dbg_printf(xhp, "[pkgdb] cannot internalize "
"pkgdb array: %s\n", strerror(rv));
return rv;
}
xbps_dbg_printf(xhp, "[pkgdb] initialized ok.\n");
return 0;
}
int
xbps_pkgdb_update(struct xbps_handle *xhp, bool flush)
{
prop_array_t pkgdb_storage;
char *plist;
static int cached_rv;
int rv = 0;
if (cached_rv && !flush)
return cached_rv;
plist = xbps_xasprintf("%s/%s", xhp->metadir, XBPS_PKGDB);
assert(plist);
if (xhp->pkgdb && flush) {
pkgdb_storage = prop_array_internalize_from_zfile(plist);
if (pkgdb_storage == NULL ||
!prop_array_equals(xhp->pkgdb, pkgdb_storage)) {
/* flush dictionary to storage */
if (!prop_array_externalize_to_file(xhp->pkgdb, plist)) {
free(plist);
return errno;
}
}
if (pkgdb_storage)
prop_object_release(pkgdb_storage);
prop_object_release(xhp->pkgdb);
xhp->pkgdb = NULL;
cached_rv = 0;
}
/* update copy in memory */
if ((xhp->pkgdb = prop_array_internalize_from_zfile(plist)) == NULL)
cached_rv = rv = errno;
free(plist);
return rv;
}
void HIDDEN
xbps_pkgdb_release(struct xbps_handle *xhp)
{
assert(xhp != NULL);
if (xhp->pkgdb == NULL)
return;
prop_object_release(xhp->pkgdb);
xhp->pkgdb = NULL;
xbps_dbg_printf(xhp, "[pkgdb] released ok.\n");
}
static int
foreach_pkg_cb(struct xbps_handle *xhp,
int (*fn)(struct xbps_handle *, prop_object_t, void *, bool *),
void *arg,
bool reverse)
{
int rv;
if ((rv = xbps_pkgdb_init(xhp)) != 0)
return rv;
if (reverse)
rv = xbps_callback_array_iter_reverse(xhp, xhp->pkgdb, fn, arg);
else
rv = xbps_callback_array_iter(xhp, xhp->pkgdb, fn, arg);
return rv;
}
int
xbps_pkgdb_foreach_reverse_cb(struct xbps_handle *xhp,
int (*fn)(struct xbps_handle *, prop_object_t, void *, bool *),
void *arg)
{
return foreach_pkg_cb(xhp, fn, arg, true);
}
int
xbps_pkgdb_foreach_cb(struct xbps_handle *xhp,
int (*fn)(struct xbps_handle *, prop_object_t, void *, bool *),
void *arg)
{
return foreach_pkg_cb(xhp, fn, arg, false);
}
prop_dictionary_t
xbps_pkgdb_get_pkgd(struct xbps_handle *xhp, const char *pkg, bool bypattern)
{
prop_dictionary_t pkgd = NULL;
if (xbps_pkgdb_init(xhp) != 0)
return NULL;
if (bypattern)
pkgd = xbps_find_pkg_in_array_by_pattern(xhp, xhp->pkgdb, pkg, NULL);
else
pkgd = xbps_find_pkg_in_array_by_name(xhp, xhp->pkgdb, pkg, NULL);
return pkgd;
}
prop_dictionary_t
xbps_pkgdb_get_pkgd_by_pkgver(struct xbps_handle *xhp, const char *pkgver)
{
if (xbps_pkgdb_init(xhp) != 0)
return NULL;
return xbps_find_pkg_in_array_by_pkgver(xhp, xhp->pkgdb, pkgver, NULL);
}
bool
xbps_pkgdb_remove_pkgd(struct xbps_handle *xhp,
const char *pkg,
bool bypattern,
bool flush)
{
bool rv = false;
if (xbps_pkgdb_init(xhp) != 0)
return false;
if (bypattern)
rv = xbps_remove_pkg_from_array_by_pattern(xhp,
xhp->pkgdb, pkg, NULL);
else
rv = xbps_remove_pkg_from_array_by_name(xhp,
xhp->pkgdb, pkg, NULL);
if (!flush || !rv)
return rv;
if ((xbps_pkgdb_update(xhp, true)) != 0)
return false;
return true;
}
bool
xbps_pkgdb_replace_pkgd(struct xbps_handle *xhp,
prop_dictionary_t pkgd,
const char *pkg,
bool bypattern,
bool flush)
{
int rv;
if (xbps_pkgdb_init(xhp) != 0)
return false;
if (bypattern)
rv = xbps_array_replace_dict_by_pattern(xhp->pkgdb, pkgd, pkg);
else
rv = xbps_array_replace_dict_by_name(xhp->pkgdb, pkgd, pkg);
if (!flush)
return rv != 0 ? false : true;
if ((xbps_pkgdb_update(xhp, true)) != 0)
return false;
return true;
}