/*
 * 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.
 */

/*
 *      Change the label of a file
 */

#include <ctype.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <errno.h>

#include <tsol/label.h>

#include "labeld.h"
#include <sys/tsol/label_macro.h>

#include <sys/types.h>

#include <zone.h>
#include <sys/zone.h>
#include <sys/param.h>
#include <string.h>

static int abspath(char *, const char *, char *);

/*
 * setflabel(3TSOL) - set file label
 *
 * This is the library interface to the door call.
 */

#define clcall callp->param.acall.cargs.setfbcl_arg
#define clret callp->param.aret.rvals.setfbcl_ret
/*
 *
 *      Exit    error = If error reported, the error indicator,
 *                              -1, Unable to access label encodings file;
 *                               0, Invalid binary label passed;
 *                              >0, Position after the first character in
 *                                  string of error, 1 indicates entire string.
 *                      Otherwise, unchanged.
 *
 *      Returns 0, If error.
 *              1, If successful.
 *
 *      Calls   __call_labeld(SETFLABEL)
 *
 */

int
setflabel(const char *path, m_label_t *label)
{
        labeld_data_t   call;
        labeld_data_t   *callp = &call;
        size_t  bufsize = sizeof (labeld_data_t);
        size_t  datasize;
        size_t  path_len;
        static char     cwd[MAXPATHLEN];
        char            canon[MAXPATHLEN];


        /*
         * If path is relative and we haven't already determined the current
         * working directory, do so now.  Calculating the working directory
         * here lets us do the work once, instead of (potentially) repeatedly
         * in realpath().
         */
        if (*path != '/' && cwd[0] == '\0') {
                if (getcwd(cwd, MAXPATHLEN) == NULL) {
                        cwd[0] = '\0';
                        return (-1);
                }
        }
        /*
         * Find an absolute pathname in the native file system name space that
         * corresponds to path, stuffing it into canon.
         */
        if (abspath(cwd, path, canon) < 0)
                return (-1);

        path_len = strlen(canon) + 1;

        datasize = CALL_SIZE(setfbcl_call_t, path_len - BUFSIZE);
        datasize += 2; /* PAD */

        if (datasize > bufsize) {
                if ((callp = (labeld_data_t *)malloc(datasize)) == NULL) {
                        return (-1);
                }
                bufsize = datasize;
        }

        callp->callop = SETFLABEL;

        clcall.sl = *label;
        (void) strcpy(clcall.pathname, canon);

        if (__call_labeld(&callp, &bufsize, &datasize) == SUCCESS) {
                int err = callp->reterr;

                if (callp != &call) {
                        /* free allocated buffer */
                        free(callp);
                }
                /*
                 * reterr == 0, OK,
                 * reterr < 0, invalid binary label,
                 */
                if (err == 0) {
                        if (clret.status > 0) {
                                errno = clret.status;
                                return (-1);
                        } else {
                                return (0);
                        }
                } else if (err < 0) {
                        err = 0;
                }
                errno = ECONNREFUSED;
                return (-1);
        } else {
                if (callp != &call) {
                        /* free allocated buffer */
                        free(callp);
                }
                /* server not present */
                errno = ECONNREFUSED;
                return (-1);
        }
}  /* setflabel */

#undef  clcall
#undef  clret

#define clcall callp->param.acall.cargs.zcopy_arg
#define clret callp->param.aret.rvals.zcopy_ret
/*
 *
 *      Exit    status = result of zone copy request
 *                              -1, Copy not confirmed
 *                      Otherwise, unchanged.
 *
 *      Returns 0, If error.
 *              1, If successful.
 *
 *      Calls   __call_labeld(ZCOPY)
 *
 */
int
zonecopy(m_label_t *src_win_sl, char *remote_dir, char *filename,
    char *local_dir, int  transfer_mode)
{
        labeld_data_t   call;
        labeld_data_t   *callp = &call;
        size_t          bufsize = sizeof (labeld_data_t);
        size_t          datasize;
        size_t          strings;
        size_t          remote_dir_len;
        size_t          filename_len;
        size_t          local_dir_len;
        size_t          display_len;
        char            *display;

        remote_dir_len = strlen(remote_dir) + 1;
        filename_len = strlen(filename) + 1;
        local_dir_len = strlen(local_dir) + 1;

        if ((display = getenv("DISPLAY")) == NULL)
                display = "";
        display_len = strlen(display) + 1;

        strings = remote_dir_len + filename_len + local_dir_len + display_len;

        datasize = CALL_SIZE(zcopy_call_t, strings - BUFSIZE);

        datasize += 4; /* PAD */

        if (datasize > bufsize) {
                if ((callp = (labeld_data_t *)malloc(datasize)) == NULL) {
                        return (0);
                }
                bufsize = datasize;
        }

        strings = 0;
        callp->callop = ZCOPY;

        clcall.src_win_sl = *src_win_sl;
        clcall.transfer_mode = transfer_mode;
        clcall.remote_dir = strings;
        strings += remote_dir_len;
        clcall.filename = strings;
        strings += filename_len;
        clcall.local_dir = strings;
        strings += local_dir_len;
        clcall.display = strings;

        (void) strcpy(&clcall.buf[clcall.remote_dir], remote_dir);
        (void) strcpy(&clcall.buf[clcall.filename], filename);
        (void) strcpy(&clcall.buf[clcall.local_dir], local_dir);
        (void) strcpy(&clcall.buf[clcall.display], display);

        if (__call_labeld(&callp, &bufsize, &datasize) == SUCCESS) {
                int err = callp->reterr;

                if (callp != &call) {
                        /* free allocated buffer */
                        free(callp);
                }
                /*
                 * reterr == 0, OK,
                 * reterr < 0, transer not confirmed
                 */
                if (err == 0) {
                        return (clret.status);
                } else if (err < 0) {
                        err = 0;
                }
                return (PIPEMSG_CANCEL);
        } else {
                if (callp != &call) {
                        /* free allocated buffer */
                        free(callp);
                }
                /* server not present */
                return (PIPEMSG_CANCEL);
        }
}

/*
 * Convert the path given in raw to canonical, absolute, symlink-free
 * form, storing the result in the buffer named by canon, which must be
 * at least MAXPATHLEN bytes long.  If wd is non-NULL, assume that it
 * points to a path for the current working directory and use it instead
 * of invoking getcwd; accepting this value as an argument lets our caller
 * cache the value, so that realpath (called from this routine) doesn't have
 * to recalculate it each time it's given a relative pathname.
 *
 * Return 0 on success, -1 on failure.
 */
int
abspath(char *wd, const char *raw, char *canon)
{
        char            absbuf[MAXPATHLEN];

        /*
         * Preliminary sanity check.
         */
        if (raw == NULL || canon == NULL)
                return (-1);

        /*
         * If the path is relative, convert it to absolute form,
         * using wd if it's been supplied.
         */
        if (raw[0] != '/') {
                char    *limit = absbuf + sizeof (absbuf);
                char    *d;

                /* Fill in working directory. */
                if (wd != NULL)
                        (void) strncpy(absbuf, wd, sizeof (absbuf));
                else if (getcwd(absbuf, strlen(absbuf)) == NULL)
                        return (-1);

                /* Add separating slash. */
                d = absbuf + strlen(absbuf);
                if (d < limit)
                        *d++ = '/';

                /* Glue on the relative part of the path. */
                while (d < limit && (*d++ = *raw++))
                        continue;

                raw = absbuf;
        }

        /*
         * Call realpath to canonicalize and resolve symlinks.
         */
        return (realpath(raw, canon) == NULL ? -1 : 0);
}