libtsnet/common/tsol_gettpent.c

/*
 * 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 (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved.
 */

#include <stdio.h>
#include <string.h>
#include <nss_dbdefs.h>
#include <libtsnet.h>
#include <secdb.h>
#include <nss.h>
#include <libintl.h>

extern void _nss_XbyY_fgets(FILE *, nss_XbyY_args_t *); /* from lib.c */

static int tsol_tp_stayopen;    /* Unsynchronized, but it affects only  */
                /*   efficiency, not correctness    */
static DEFINE_NSS_DB_ROOT(db_root);
static DEFINE_NSS_GETENT(context);


static void
_nss_initf_tsol_tp(nss_db_params_t *p)
{
    p->name = NSS_DBNAM_TSOL_TP;
    p->default_config = NSS_DEFCONF_TSOL_TP;
}

tsol_tpent_t *
tsol_gettpbyname(const char *name)
{
    int     err = 0;
    char        *errstr = NULL;
    char        buf[NSS_BUFLEN_TSOL_TP];
    tsol_tpstr_t    result;
    tsol_tpstr_t    *tpstrp = NULL;
    nss_XbyY_args_t arg;

    NSS_XbyY_INIT(&arg, &result, buf, sizeof (buf), str_to_tpstr);

    arg.key.name    = name;
    arg.stayopen    = tsol_tp_stayopen;
    arg.h_errno = TSOL_NOT_FOUND;
    arg.status = nss_search(&db_root, _nss_initf_tsol_tp,
        NSS_DBOP_TSOL_TP_BYNAME, &arg);
    tpstrp = (tsol_tpstr_t *)NSS_XbyY_FINI(&arg);

#ifdef  DEBUG
    (void) fprintf(stdout, "tsol_gettpbyname %s: %s\n",
        name, tpstrp ? tpstrp->tpstr_template : "NULL");
#endif  /* DEBUG */

    if (tpstrp == NULL)
        return (NULL);

    return (tpstr_to_ent(tpstrp, &err, &errstr));
}

void
tsol_settpent(int stay)
{
    tsol_tp_stayopen |= stay;
    nss_setent(&db_root, _nss_initf_tsol_tp, &context);
}

void
tsol_endtpent(void)
{
    tsol_tp_stayopen = 0;
    nss_endent(&db_root, _nss_initf_tsol_tp, &context);
    nss_delete(&db_root);
}

tsol_tpent_t *
tsol_gettpent(void)
{
    int     err = 0;
    char        *errstr = NULL;
    char        buf[NSS_BUFLEN_TSOL_TP];
    tsol_tpstr_t    result;
    tsol_tpstr_t    *tpstrp = NULL;
    nss_XbyY_args_t arg;

    NSS_XbyY_INIT(&arg, &result, buf, sizeof (buf), str_to_tpstr);
    /* No key, no stayopen */
    arg.status = nss_getent(&db_root, _nss_initf_tsol_tp, &context, &arg);
    tpstrp = (tsol_tpstr_t *)NSS_XbyY_FINI(&arg);

#ifdef  DEBUG
    (void) fprintf(stdout, "tsol_gettpent: %s\n",
        tpstrp ? tpstrp->tpstr_template : "NULL");
#endif  /* DEBUG */

    if (tpstrp == NULL)
        return (NULL);

    return (tpstr_to_ent(tpstrp, &err, &errstr));
}

tsol_tpent_t *
tsol_fgettpent(FILE *f, boolean_t *error)
{
    int     err = 0;
    char        *errstr = NULL;
    char        buf[NSS_BUFLEN_TSOL_TP];
    tsol_tpstr_t    result;
    tsol_tpstr_t    *tpstrp = NULL;
    tsol_tpent_t    *tpentp = NULL;
    nss_XbyY_args_t arg;

    NSS_XbyY_INIT(&arg, &result, buf, sizeof (buf), str_to_tpstr);
    _nss_XbyY_fgets(f, &arg);
    tpstrp = (tsol_tpstr_t *)NSS_XbyY_FINI(&arg);
    if (tpstrp == NULL)
        return (NULL);
    tpentp = tpstr_to_ent(tpstrp, &err, &errstr);
    while (tpentp == NULL) {
        /*
         * Loop until we find a non-blank, non-comment line, or
         * until EOF. No need to log blank lines, comments.
         */
        if (err != LTSNET_EMPTY) {
            (void) fprintf(stderr, "%s: %.32s%s: %s\n",
                gettext("Error parsing tnrhtp file"), errstr,
                (strlen(errstr) > 32)? "...": "",
                (char *)tsol_strerror(err, errno));
            *error = B_TRUE;
        }
        _nss_XbyY_fgets(f, &arg);
        tpstrp = (tsol_tpstr_t *)NSS_XbyY_FINI(&arg);
        if (tpstrp == NULL) /* EOF */
            return (NULL);
        tpentp = tpstr_to_ent(tpstrp, &err, &errstr);
    }
    return (tpentp);
}

/*
 * This is the callback routine for nss.  It just wraps the tsol_sgettpent
 * parser.
 */
int
str_to_tpstr(const char *instr, int lenstr, void *entp, char *buffer,
    int buflen)
{
    int     len;
    char        *last = NULL;
    char        *sep = KV_TOKEN_DELIMIT;
    tsol_tpstr_t    *tpstrp = (tsol_tpstr_t *)entp;

    if ((instr >= buffer && (buffer + buflen) > instr) ||
        (buffer >= instr && (instr + lenstr) > buffer))
        return (NSS_STR_PARSE_PARSE);
    if (lenstr >= buflen)
        return (NSS_STR_PARSE_ERANGE);
    (void) strncpy(buffer, instr, buflen);
    tpstrp->tpstr_template = _strtok_escape(buffer, sep, &last);
    tpstrp->attrs = _strtok_escape(NULL, sep, &last);
    if (tpstrp->attrs != NULL) {
        len = strlen(tpstrp->attrs);
        if (tpstrp->attrs[len - 1] == '\n')
            tpstrp->attrs[len - 1] = '\0';
    }

#ifdef  DEBUG
    (void) fprintf(stdout,
        "str_to_tpstr:\nstr - %s\n\ttemplate - %s\n\tattrs - %s\n",
        instr, tpstrp->tpstr_template ? tpstrp->tpstr_template : "NULL",
        tpstrp->attrs ? tpstrp->attrs : "NULL");
#endif  /* DEBUG */

    return (NSS_STR_PARSE_SUCCESS);
}