/*
 * 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 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/ctfs.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <assert.h>
#include <libuutil.h>
#include <libintl.h>
#include <string.h>
#include <procfs.h>
#include <libcontract.h>
#include <libcontract_priv.h>
#include "libcontract_impl.h"
#include "process_dump.h"
#include "device_dump.h"


contract_type_t types[CTT_MAXTYPE] = {
        { "process", event_process },
        { "device", event_device }
};

static int
close_on_exec(int fd)
{
        int flags = fcntl(fd, F_GETFD, 0);
        if ((flags != -1) && (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) != -1))
                return (0);
        return (-1);
}

int
contract_latest(ctid_t *id)
{
        int cfd, r;
        ct_stathdl_t st;
        ctid_t result;

        if ((cfd = open64(CTFS_ROOT "/process/latest", O_RDONLY)) == -1)
                return (errno);

        if ((r = ct_status_read(cfd, CTD_COMMON, &st)) != 0) {
                (void) close(cfd);
                return (r);
        }

        result = ct_status_get_id(st);
        ct_status_free(st);
        (void) close(cfd);

        *id = result;
        return (0);
}

int
contract_open(ctid_t ctid, const char *type, const char *file, int oflag)
{
        char path[PATH_MAX];
        int n, fd;

        assert((oflag & O_CREAT) == 0);

        if (type == NULL)
                type = "all";

        n = snprintf(path, PATH_MAX, CTFS_ROOT "/%s/%ld/%s", type, ctid, file);
        if (n >= PATH_MAX) {
                errno = ENAMETOOLONG;
                return (-1);
        }

        fd = open64(path, oflag);
        if (fd != -1) {
                if (close_on_exec(fd) == -1) {
                        int err = errno;
                        (void) close(fd);
                        errno = err;
                        return (-1);
                }
        }
        return (fd);
}

int
contract_abandon_id(ctid_t ctid)
{
        int fd, err;

        fd = contract_open(ctid, "all", "ctl", O_WRONLY);
        if (fd == -1)
                return (errno);

        err = ct_ctl_abandon(fd);
        (void) close(fd);

        return (err);
}

ctid_t
getctid(void)
{
        int fd;
        psinfo_t ps;

        if ((fd = open("/proc/self/psinfo", O_RDONLY)) == -1)
                return (-1);
        if (read(fd, &ps, sizeof (ps)) != sizeof (ps)) {
                (void) close(fd);
                return (-1);
        }
        (void) close(fd);
        return (ps.pr_contract);
}

void
contract_event_dump(FILE *file, ct_evthdl_t hdl, int verbose)
{
        ct_typeid_t type;
        struct ctlib_event_info *info = hdl;

        type = info->event.ctev_cttype;
        types[type].type_event(file, hdl, verbose);
}

void
contract_negend_dump(FILE *file, ct_evthdl_t ev)
{
        ctevid_t nevid = 0;
        ctid_t my_ctid = ct_event_get_ctid(ev);
        ctid_t new_ctid = 0;
        char *s;

        (void) ct_event_get_nevid(ev, &nevid);
        (void) ct_event_get_newct(ev, &new_ctid);

        if (new_ctid != my_ctid) {
                s = dgettext(TEXT_DOMAIN, "negotiation %llu succeeded\n");
        } else {
                s = dgettext(TEXT_DOMAIN, "negotiation %llu failed\n");
        }
        /*LINTED*/
        (void) fprintf(file, s, (unsigned long long)nevid);
}