/*
 * 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.
 */

/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */


#include <stdio.h>
#include <limits.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <pkgstrct.h>
#include <string.h>
#include <locale.h>
#include <libintl.h>
#include <pkglib.h>
#include "install.h"
#include "libadm.h"
#include "libinst.h"

#define ERR_PKGINFO     "unable to access pkginfo file <%s>"
#define ERR_PKGMAP      "unable to access pkgmap file <%s>"
#define ERR_NOPARAM     "%s parameter is not defined in <%s>"
#define ERR_PKGBAD      "PKG parameter is invalid <%s>"
#define ERR_PKGMTCH     "PKG parameter <%s> does not match instance <%s>"

char    *pkgarch;
char    *pkgvers;
char    *pkgabrv;
char    *pkgname;
char    pkgwild[PKGSIZ+1];

/*
 * This function confirms the presence of pkgmap and pkginfo and verifies
 * that the mandatory parameters are available in the environment.
 */
int
pkgenv(char *pkginst, char *p_pkginfo, char *p_pkgmap)
{
        FILE    *fp;
        char    *value,
                path[PATH_MAX],
                param[MAX_PKG_PARAM_LENGTH];
        int     errflg;

        errflg = 0;
        if (access(p_pkgmap, 0)) {
                progerr(gettext(ERR_PKGMAP), p_pkgmap);
                return (1);
        }
        if ((fp = fopen(p_pkginfo, "r")) == NULL) {
                progerr(gettext(ERR_PKGINFO), p_pkginfo);
                return (1);
        }
        param[0] = '\0';
        while (value = fpkgparam(fp, param)) {
                if (strcmp("PATH", param))
                        putparam(param, value);
                free(value);
                param[0] = '\0';
        }
        (void) fclose(fp);
        /*
         * verify that required parameters are now present in
         * the environment
         */
        if ((pkgabrv = getenv("PKG")) == NULL) {
                progerr(gettext(ERR_NOPARAM), "PKG", path);
                errflg++;
        }
        if (pkgnmchk(pkgabrv, NULL, 0) || strchr(pkgabrv, '.')) {
                progerr(gettext(ERR_PKGBAD), pkgabrv);
                errflg++;
        }
        (void) snprintf(pkgwild, sizeof (pkgwild), "%s.*", pkgabrv);
        if ((pkgname = getenv("NAME")) == NULL) {
                progerr(gettext(ERR_NOPARAM), "NAME", path);
                errflg++;
        }
        if ((pkgarch = getenv("ARCH")) == NULL) {
                progerr(gettext(ERR_NOPARAM), "ARCH", path);
                errflg++;
        }
        if ((pkgvers = getenv("VERSION")) == NULL) {
                progerr(gettext(ERR_NOPARAM), "VERSION", path);
                errflg++;
        }
        if (getenv("CATEGORY") == NULL) {
                progerr(gettext(ERR_NOPARAM), "CATEGORY", path);
                errflg++;
        }
        /*
         * verify consistency between PKG parameter and pkginst that
         * was determined from the directory structure
         */
        (void) snprintf(param, sizeof (param), "%s.*", pkgabrv);
        if (pkgnmchk(pkginst, param, 0)) {
                progerr(gettext(ERR_PKGMTCH), pkgabrv, pkginst);
                errflg++;
        }
        return (errflg);
}