/*
 * 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 2005 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 "mail.h"
/*
        Parse the command line.
        Return index of first non-option field (i.e. user)
*/
int
parse(int argc, char **argv)
{
        int                     c;
        char                    *tmailsurr;
        static char             pn[] = "parse";

        /*
                "mail +" means to print in reverse order and is
                equivalent to "mail -r"
        */
        if ((argc > 1) && (argv[1][0] == '+')) {
                if (ismail) {
                        argv[1] = "-r";
                } else {
                        goerr++;
                }
        }

        while ((c = getopt(argc, argv, "m:f:x:shrpPqeEdtT:w")) != EOF) {
                switch(c) {
                /*
                        Set debugging level...
                */
                case 'x':
                        debug = atoi(optarg);
                        orig_dbglvl = debug;
                        if (debug < 0) {
                                /* Keep trace file even if successful */
                                keepdbgfile = -1;
                                debug = -debug;
                        }
                        break;

                /*
                        for backwards compatability with mailx...
                */
                case 's':
                        /* ignore this option */
                        break;
                /*
                 * Deliver directly to a mailbox. Do Not go to sendmail
                 */
                case 'd':
                        deliverflag = TRUE;
                        break;

                /*
                        do not print mail
                */
                case 'e':
                        if (ismail) {
                                flge = 1;
                        } else {
                                goerr++;
                        }
                        optcnt++;
                        break;
                /*
                        do not print mail
                */
                case 'E':
                        if (ismail) {
                                flgE = 1;
                        } else {
                                goerr++;
                        }
                        optcnt++;
                        break;
                /*
                 *      use alternate file as mailfile, when reading mail
                 *      use this from user when sending mail.
                 */
                case 'f':
                        flgf = 1;
                        fromflag = TRUE;
                        mailfile = optarg;
                        strncpy(from_user, optarg, sizeof (from_user));
                        from_user[sizeof (from_user) - 1] = '\0';
                        optcnt++;
                        break;

                /*
                        Print headers first
                */
                case 'h':
                        if (ismail) {
                                flgh = 1;
                        } else {
                                goerr++;
                        }
                        optcnt++;
                        break;

                /*
                        print without prompting
                */
                case 'p':
                        if (ismail) {
                                flgp++;
                        } else {
                                goerr++;
                        }
                        optcnt++;
                        break;

                /*
                        override selective display default setting
                        when reading mail...
                */
                case 'P':
                        if (ismail) {
                                flgP++;
                        }
                        optcnt++;
                        break;

                /*
                        terminate on deletes
                */
                case 'q':
                        if (ismail) {
                                delflg = 0;
                        } else {
                                goerr++;
                        }
                        optcnt++;
                        break;

                /*
                        print by first in, first out order
                */
                case 'r':
                        if (ismail) {
                                flgr = 1;
                        } else {
                                goerr++;
                        }
                        optcnt++;
                        break;

                /*
                        add To: line to letters
                */
                case 't':
                        flgt = 1;
                        optcnt++;
                        break;

                /*
                        don't wait on sends
                */
                case 'w':
                        flgw = 1;
                        break;

                /*
                        set message-type:
                */
                case 'm':
                        msgtype = optarg;
                        if (msgtype[0] == '\0' || msgtype[0] == '-') {
                                goerr++;
                        } else {
                                flgm = 1;
                        }
                        break;

                /*
                        bad option
                */
                case '?':
                        goerr++;
                        break;
                }
        }



        if (argc == optind) {

            if (flgm) {
                errmsg(E_SYNTAX,
                        "-m option used but no recipient(s) specified.");
                goerr++;
            }
            if (flgt) {
                errmsg(E_SYNTAX,
                        "-t option used but no recipient(s) specified.");
                goerr++;
            }
            if (flgw) {
                errmsg(E_SYNTAX,
                        "-w option used but no recipient(s) specified.");
                goerr++;
            }
            if (flgf) {
                    if (mailfile[0] == '-') {
                            errmsg(E_SYNTAX,
                                   "Files names must not begin with '-'");
                            done(0);
                    }
                    if (!ismail)
                            goerr++;
            }
        }

        if (ismail && (goerr > 0)) {
                errmsg(E_SYNTAX,"Usage: [-ehpPqr] [-f file] [-x debuglevel]");
                (void) fprintf (stderr, "or\t[-tw] [-m message_type] [-T file] [-x debuglevel] persons\n");
                (void) fprintf (stderr, "or\t[-x debuglevel]\n");
                done(0);
        }

        return (optind);
}