154 lines
4.4 KiB
C
154 lines
4.4 KiB
C
/*-
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* Copyright (c) 2009-2011 Juan Romero Pardines.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <xbps_api.h>
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#include "xbps_api_impl.h"
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/**
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* @file lib/package_orphans.c
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* @brief Package orphans handling routines
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* @defgroup pkg_orphans Package orphans handling functions
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*
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* Functions to find installed package orphans.
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*
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* Package orphans were installed automatically by another package,
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* but currently no other packages are depending on.
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*
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* The following image shown below shows the registered packages database
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* dictionary (the array returned by xbps_find_pkg_orphans() will
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* contain a package dictionary per orphan found):
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*
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* @image html images/xbps_regpkgdb_dictionary.png
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*
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* Legend:
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* - <b>Salmon filled box</b>: \a XBPS_REGPKGDB_PLIST file internalized.
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* - <b>White filled box</b>: mandatory objects.
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* - <b>Grey filled box</b>: optional objects.
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* - <b>Green filled box</b>: possible value set in the object, only one
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* of them is set.
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*
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* Text inside of white boxes are the key associated with the object, its
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* data type is specified on its edge, i.e array, bool, integer, string,
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* dictionary.
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*/
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static int
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find_orphan_pkg(prop_object_t obj, void *arg, bool *loop_done)
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{
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prop_array_t reqby, orphans = arg;
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prop_object_t obj2;
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prop_object_iterator_t iter;
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const char *pkgdep;
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unsigned int ndep = 0, cnt = 0;
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bool automatic = false;
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int rv = 0;
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pkg_state_t state;
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(void)loop_done;
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/*
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* Skip packages that were not installed automatically.
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*/
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prop_dictionary_get_bool(obj, "automatic-install", &automatic);
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if (!automatic)
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return 0;
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if ((rv = xbps_get_pkg_state_dictionary(obj, &state)) != 0)
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return rv;
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/*
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* Skip packages that aren't fully installed.
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*/
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if (state != XBPS_PKG_STATE_INSTALLED)
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return 0;
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reqby = prop_dictionary_get(obj, "requiredby");
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if (prop_object_type(reqby) != PROP_TYPE_ARRAY)
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return EINVAL;
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if ((cnt = prop_array_count(reqby)) == 0) {
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prop_array_add(orphans, obj);
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return 0;
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}
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iter = prop_array_iterator(reqby);
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if (iter == NULL)
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return ENOMEM;
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while ((obj2 = prop_object_iterator_next(iter)) != NULL) {
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pkgdep = prop_string_cstring_nocopy(obj2);
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if (pkgdep == NULL) {
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prop_object_iterator_release(iter);
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return EINVAL;
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}
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if (xbps_find_pkg_in_array_by_pattern(orphans, pkgdep))
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ndep++;
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}
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prop_object_iterator_release(iter);
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if (ndep != cnt)
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return 0;
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if (!prop_array_add(orphans, obj))
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return EINVAL;
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return 0;
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}
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prop_array_t
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xbps_find_pkg_orphans(void)
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{
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prop_array_t array = NULL;
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prop_dictionary_t dict;
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int rv = 0;
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if ((dict = xbps_regpkgdb_dictionary_get()) == NULL)
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return NULL;
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/*
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* Prepare an array with all packages previously found.
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*/
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if ((array = prop_array_create()) == NULL)
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goto out;
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/*
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* Find out all orphans by looking at the
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* regpkgdb dictionary and iterate in reverse order
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* in which packages were installed.
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*/
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rv = xbps_callback_array_iter_reverse_in_dict(dict, "packages",
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find_orphan_pkg, array);
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if (rv != 0) {
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errno = rv;
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prop_object_release(array);
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array = NULL;
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}
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out:
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xbps_regpkgdb_dictionary_release();
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return array;
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}
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