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Annotation of embedaddon/strongswan/src/libimcv/pts/pts_symlinks.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (C) 2020 Andreas Steffen
                      3:  * HSR Hochschule fuer Technik Rapperswil
                      4:  *
                      5:  * This program is free software; you can redistribute it and/or modify it
                      6:  * under the terms of the GNU General Public License as published by the
                      7:  * Free Software Foundation; either version 2 of the License, or (at your
                      8:  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
                      9:  *
                     10:  * This program is distributed in the hope that it will be useful, but
                     11:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     12:  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
                     13:  * for more details.
                     14:  */
                     15: 
                     16: #include "pts_symlinks.h"
                     17: 
                     18: #include <collections/linked_list.h>
                     19: #include <utils/debug.h>
                     20: 
                     21: typedef struct private_pts_symlinks_t private_pts_symlinks_t;
                     22: typedef struct entry_t entry_t;
                     23: 
                     24: /**
                     25:  * Private data of a pts_symlinks_t object.
                     26:  *
                     27:  */
                     28: struct private_pts_symlinks_t {
                     29: 
                     30:        /**
                     31:         * Public pts_symlinks_t interface.
                     32:         */
                     33:        pts_symlinks_t public;
                     34: 
                     35:        /**
                     36:         * List of symbolic links pointing to directories
                     37:         */
                     38:        linked_list_t *list;
                     39: 
                     40:        /**
                     41:         * Reference count
                     42:         */
                     43:        refcount_t ref;
                     44: 
                     45: };
                     46: 
                     47: /**
                     48:  * Symlink entry
                     49:  */
                     50: struct entry_t {
                     51:        chunk_t symlink;
                     52:        chunk_t dir;
                     53: };
                     54: 
                     55: /**
                     56:  * Free an entry_t object
                     57:  */
                     58: static void free_entry(entry_t *entry)
                     59: {
                     60:        if (entry)
                     61:        {
                     62:                free(entry->symlink.ptr);
                     63:                free(entry->dir.ptr);
                     64:                free(entry);
                     65:        }
                     66: }
                     67: 
                     68: METHOD(pts_symlinks_t, get_count, int,
                     69:        private_pts_symlinks_t *this)
                     70: {
                     71:        return this->list->get_count(this->list);
                     72: }
                     73: 
                     74: METHOD(pts_symlinks_t, add, void,
                     75:        private_pts_symlinks_t *this, chunk_t symlink, chunk_t dir)
                     76: {
                     77:        entry_t *entry;
                     78: 
                     79:        entry = malloc_thing(entry_t);
                     80:        entry->symlink = chunk_clone(symlink);
                     81:        entry->dir = chunk_clone(dir);
                     82: 
                     83:        this->list->insert_last(this->list, entry);
                     84: }
                     85: 
                     86: CALLBACK(symlink_filter, bool,
                     87:        void *null, enumerator_t *orig, va_list args)
                     88: {
                     89:        entry_t *entry;
                     90:        chunk_t *symlink;
                     91:        chunk_t *dir;
                     92: 
                     93:        VA_ARGS_VGET(args, symlink, dir);
                     94: 
                     95:        if (orig->enumerate(orig, &entry))
                     96:        {
                     97:                *symlink = entry->symlink;
                     98:                *dir     = entry->dir;
                     99:                return TRUE;
                    100:        }
                    101:        return FALSE;
                    102: }
                    103: 
                    104: METHOD(pts_symlinks_t, create_enumerator, enumerator_t*,
                    105:        private_pts_symlinks_t *this)
                    106: {
                    107:        return enumerator_create_filter(this->list->create_enumerator(this->list),
                    108:                                                                        symlink_filter, NULL, NULL);
                    109: }
                    110: 
                    111: METHOD(pts_symlinks_t, get_ref, pts_symlinks_t*,
                    112:        private_pts_symlinks_t *this)
                    113: {
                    114:        ref_get(&this->ref);
                    115:        return &this->public;
                    116: }
                    117: 
                    118: METHOD(pts_symlinks_t, destroy, void,
                    119:        private_pts_symlinks_t *this)
                    120: {
                    121:        if (ref_put(&this->ref))
                    122:        {
                    123:                this->list->destroy_function(this->list, (void *)free_entry);
                    124:                free(this);
                    125:        }
                    126: }
                    127: 
                    128: /**
                    129:  * See header
                    130:  */
                    131: pts_symlinks_t *pts_symlinks_create()
                    132: {
                    133:        private_pts_symlinks_t *this;
                    134: 
                    135:        INIT(this,
                    136:                .public = {
                    137:                        .get_count = _get_count,
                    138:                        .add = _add,
                    139:                        .create_enumerator = _create_enumerator,
                    140:                        .get_ref = _get_ref,
                    141:                        .destroy = _destroy,
                    142:                },
                    143:                .list = linked_list_create(),
                    144:                .ref = 1,
                    145:        );
                    146: 
                    147:        return &this->public;
                    148: }
                    149: