/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2004 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 <string.h>
#include <signal.h>
#include <stdlib.h>
#include <locale.h>
#include <libintl.h>
#include <limits.h>
#include "usage.h"
#include "libadm.h"

#define BADPID  (-2)

static char     *prog;
static char     *deflt = NULL, *prompt = NULL, *error = NULL, *help = NULL;
static int      signo = 0;
static int      kpid = BADPID;
static char     *fmt = NULL;

static const char       vusage[] = "f";
static const char       husage[] = "fWh";
static const char       eusage[] = "fWe";

#define MYFMT "%s:ERROR:invalid format\n" \
        "valid format descriptors are:\n" \
        "\t%%b  #abbreviated month name\n" \
        "\t%%B  #full month name\n" \
        "\t%%d  #day of month (01-31)\n" \
        "\t%%D  #date as %%m/%%d/%%y or %%m-%%d-%%y (default)\n" \
        "\t%%e  #day of month (1-31)\n" \
        "\t%%m  #month of year (01-12)\n" \
        "\t%%y  #year within century (YY)\n" \
        "\t%%Y  #year as CCYY\n"

static void
usage(void)
{
        switch (*prog) {
        default:
                (void) fprintf(stderr,
                        gettext("usage: %s [options] [-f format]\n"), prog);
                (void) fprintf(stderr, gettext(OPTMESG));
                (void) fprintf(stderr, gettext(STDOPTS));
                break;

        case 'v':
                (void) fprintf(stderr,
                        gettext("usage: %s [-f format] input\n"), prog);
                break;

        case 'h':
                (void) fprintf(stderr,
                        gettext("usage: %s [options] [-f format]\n"), prog);
                (void) fprintf(stderr, gettext(OPTMESG));
                (void) fprintf(stderr,
                        gettext("\t-W width\n\t-h help\n"));
                break;

        case 'e':
                (void) fprintf(stderr,
                        gettext("usage: %s [options] [-f format]\n"), prog);
                (void) fprintf(stderr, gettext(OPTMESG));
                (void) fprintf(stderr,
                        gettext("\t-W width\n\t-h error\n"));
                break;
        }
        exit(1);
}

/*
 * Given argv[0], return a pointer to the basename of the program.
 */
static char *
prog_name(char *arg0)
{
        char *str;

        /* first strip trailing '/' characters (exec() allows these!) */
        str = arg0 + strlen(arg0);
        while (str > arg0 && *--str == '/')
                *str = '\0';
        if ((str = strrchr(arg0, '/')) != NULL)
                return (str + 1);
        return (arg0);
}

int
main(int argc, char **argv)
{
        int     c, n;
        char    *date;
        size_t  len;

        (void) setlocale(LC_ALL, "");

#if     !defined(TEXT_DOMAIN)
#define TEXT_DOMAIN     "SYS_TEST"
#endif
        (void) textdomain(TEXT_DOMAIN);

        prog = prog_name(argv[0]);

        while ((c = getopt(argc, argv, "f:d:p:e:h:k:s:QW:?")) != EOF) {
                /* check for invalid option */
                if ((*prog == 'v') && !strchr(vusage, c))
                        usage();
                if ((*prog == 'e') && !strchr(eusage, c))
                        usage();
                if ((*prog == 'h') && !strchr(husage, c))
                        usage();

                switch (c) {
                case 'Q':
                        ckquit = 0;
                        break;

                case 'W':
                        ckwidth = atoi(optarg);
                        if (ckwidth < 0) {
                                (void) fprintf(stderr,
                gettext("%s: ERROR: negative display width specified\n"),
                                        prog);
                                exit(1);
                        }
                        break;

                case 'f':
                        fmt = optarg;
                        break;

                case 'd':
                        deflt = optarg;
                        break;

                case 'p':
                        prompt = optarg;
                        break;

                case 'e':
                        error = optarg;
                        break;

                case 'h':
                        help = optarg;
                        break;

                case 'k':
                        kpid = atoi(optarg);
                        break;

                case 's':
                        signo = atoi(optarg);
                        break;

                default:
                        usage();
                }
        }

        if (signo) {
                if (kpid == BADPID)
                        usage();
        } else
                signo = SIGTERM;

        if (*prog == 'v') {
                if (argc != (optind + 1))
                        usage();
                n = (ckdate_val(fmt, argv[optind]));
                if (n == 4)
                        (void) fprintf(stderr, gettext(MYFMT), prog);
                exit(n);
        }

        if (optind != argc)
                usage();

        if (*prog == 'e') {
                ckindent = 0;
                if (ckdate_err(fmt, error)) {
                        (void) fprintf(stderr, gettext(MYFMT), prog);
                        exit(4);
                } else
                        exit(0);

        } else if (*prog == 'h') {
                ckindent = 0;
                if (ckdate_hlp(fmt, help)) {
                        (void) fprintf(stderr, gettext(MYFMT), prog);
                        exit(4);
                } else
                        exit(0);

        }

        if (deflt) {
                len = strlen(deflt) + 1;
                if (len < MAX_INPUT)
                        len = MAX_INPUT;
        } else {
                len = MAX_INPUT;
        }
        date = (char *)malloc(len);
        if (!date) {
                (void) fprintf(stderr,
                        gettext("Not enough memory\n"));
                exit(1);
        }
        n = ckdate(date, fmt, deflt, error, help, prompt);
        if (n == 3) {
                if (kpid > -2)
                        (void) kill(kpid, signo);
                (void) puts("q");
        } else if (n == 0)
                (void) printf("%s", date);
        if (n == 4)
                (void) fprintf(stderr, gettext(MYFMT), prog);
        return (n);
}