/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Routines to handle getexec* calls in nscd
 */

#include <string.h>
#include <exec_attr.h>
#include "cache.h"

static int execattr_compar(const void *, const void *);
static uint_t execattr_gethash(nss_XbyY_key_t *, int);
static void execattr_getlogstr(char *, char *, size_t, nss_XbyY_args_t *);

#define nam_db          ctx->nsc_db[0]
#define id_db           ctx->nsc_db[1]
#define nam_id_db       ctx->nsc_db[2]
#define NSC_NAME_EXECATTR_BYNAME        "execattr_byname"
#define NSC_NAME_EXECATTR_BYID          "execattr_byid"
#define NSC_NAME_EXECATTR_BYNAMEID      "execattr_bynameid"

void
exec_init_ctx(nsc_ctx_t *ctx) {
        ctx->dbname = NSS_DBNAM_EXECATTR;
        ctx->file_name = "/etc/security/exec_attr";
        ctx->db_count = 3;
        nam_db = make_cache(nsc_key_other,
                        NSS_DBOP_EXECATTR_BYNAME,
                        NSC_NAME_EXECATTR_BYNAME,
                        execattr_compar,
                        execattr_getlogstr,
                        execattr_gethash, nsc_ht_default, -1);
        id_db = make_cache(nsc_key_other,
                        NSS_DBOP_EXECATTR_BYID,
                        NSC_NAME_EXECATTR_BYID,
                        execattr_compar,
                        execattr_getlogstr,
                        execattr_gethash, nsc_ht_default, -1);
        nam_id_db = make_cache(nsc_key_other,
                        NSS_DBOP_EXECATTR_BYNAMEID,
                        NSC_NAME_EXECATTR_BYNAMEID,
                        execattr_compar,
                        execattr_getlogstr,
                        execattr_gethash, nsc_ht_default, -1);
}

#define EXEC_STR_CMP(s1, s2) \
        if ((a = s1) == NULL) \
                a = z; \
        if ((b = s2) == NULL) \
                b = z; \
        res = strcmp(a, b); \
        if (res != 0) \
                return (res > 0 ? 1 : -1);

static int
execattr_compar(const void *n1, const void *n2) {
        nsc_entry_t     *e1 = (nsc_entry_t *)n1;
        nsc_entry_t     *e2 = (nsc_entry_t *)n2;
        _priv_execattr  *ep1 = (_priv_execattr *)e1->key.attrp;
        _priv_execattr  *ep2 = (_priv_execattr *)e2->key.attrp;
        int             res;
        const char      *a, *b, *z = "";

        /* compare name */
        EXEC_STR_CMP(ep1->name, ep2->name);

        /* compare policy */
        EXEC_STR_CMP(ep1->policy, ep2->policy);

        /* compare type */
        EXEC_STR_CMP(ep1->type, ep2->type);

        /* compare id */
        EXEC_STR_CMP(ep1->id, ep2->id);

        /* compare search flag */
        return (_NSC_INT_KEY_CMP(ep1->search_flag, ep2->search_flag));
}

static uint_t
execattr_gethash(nss_XbyY_key_t *key, int htsize) {
        _priv_execattr  *ep = key->attrp;
        char            keys[1024];
        int             len;

        len = snprintf(keys, sizeof (keys), "%s:%s:%s:%s:%d",
                ep->name ? ep->name : "", ep->type ? ep->type : "",
                ep->id ? ep->id : "", ep->policy ? ep->policy : "",
                ep->search_flag);
        return (db_gethash(keys, len, htsize));
}

static void
execattr_getlogstr(char *name, char *whoami, size_t len,
        nss_XbyY_args_t *argp) {
        _priv_execattr  *ep = argp->key.attrp;

        (void) snprintf(whoami, len,
                "%s [name=%s:type=%s:id=%s:policy=%s:flags=%d]",
                name, check_null(ep->name), check_null(ep->type),
                check_null(ep->id), check_null(ep->policy),
                ep->search_flag);
}