/*
 * 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 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */


/*
 *      hextoalabel - Convert an internal label to its human readable
 *                    equivalent.
 */

#include <errno.h>
#include <libintl.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stropts.h>

#include <sys/param.h>

#include <tsol/label.h>

#if !defined(TEXT_DOMAIN)
#define TEXT_DOMAIN     "SYS_TEST"
#endif  /* !defined(TEXT_DOMAIN) */

static void
label_error(const char *hex, const int err)
{
        if (errno == EINVAL) {
                switch (err) {
                case M_BAD_STRING:
                        (void) fprintf(stderr,
                            gettext("hextoalabel: bad string %s\n"), hex);
                break;
                case M_BAD_LABEL:
                        (void) fprintf(stderr,
                            gettext("hextoalabel: bad previous label\n"));
                break;
                default:
                        (void) fprintf(stderr,
                            gettext("hextoalabel: parsing error found in "
                            "\"%s\" at position %d\n"), hex, err);
                break;
                }
        } else {
                perror("hextoalabel");
        }
        exit(1);
        /*NOTREACHED*/
}

int
main(int argc, char **argv)
{
        int cflg = 0;                   /* true if Clearance only */
        int errflg = 0;                 /* true if arg error */
        m_label_t *label = NULL;
        char hex[PIPE_BUF];             /* internal label */
        char *ascii = NULL;             /* human readable label to print */
        int err = 0;                    /* label error */
        int c;

        (void) setlocale(LC_ALL, "");
        (void) textdomain(TEXT_DOMAIN);

        opterr = 0;
        while ((c = getopt(argc, argv, "c")) != EOF) {

                switch (c) {
                case 'c':
                        cflg++;
                        break;
                default:
                        errflg++;
                        break;
                }
        }

        argc -= optind - 1;
        if (errflg || argc > 2) {

                (void) fprintf(stderr,
                    gettext("usage: %s [-c] [hexadecimal label]\n"), argv[0]);
                exit(1);
                /*NOTREACHED*/
        }

        if (argc == 2) {
                /* use label on command line */

                (void) strlcpy(hex, argv[optind], sizeof (hex));
        } else {
                /* read label from standard input */

                if ((c = read(STDIN_FILENO, hex, sizeof (hex))) <= 0) {

                        perror(gettext("reading hexadecimal label"));
                        exit(1);
                        /*NOTREACHED*/
                }

                /*
                 * replace '\n' or (end of buffer) with end of string.
                 */
                hex[c-1] = '\0';

                /*
                 * flush any remaining input past the size of the buffer.
                 */
                (void) ioctl(STDIN_FILENO, I_FLUSH, FLUSHR);
        }

        if (cflg) {
                if (str_to_label(hex, &label, USER_CLEAR, L_NO_CORRECTION,
                    &err) == -1) {
                        label_error(hex, err);
                }
                if (label_to_str(label, &ascii, M_LABEL, DEF_NAMES) != 0) {
                        perror("label_to_str");
                        exit(1);
                }
                (void) printf("%s\n", ascii);
                m_label_free(label);
                free(ascii);
        } else {
                if (str_to_label(hex, &label, MAC_LABEL, L_NO_CORRECTION,
                    &err) == -1) {
                        label_error(hex, err);
                }
                if (label_to_str(label, &ascii, M_LABEL, DEF_NAMES) != 0) {
                        perror("label_to_str");
                        exit(1);
                }
                (void) printf("%s\n", ascii);
                m_label_free(label);
                free(ascii);
        }

        return (0);     /* really exit(0); */
}