cmd/mail/isheader.c

	isheader.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * 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 (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */


#pragma ident   "%Z%%M% %I% %E% SMI"    /* SVr4.0 1.    */
#include "mail.h"
/*
 * isheader(lp, ctf) - check if lp is header line and return type
 *  lp  ->  pointer to line
 *  ctfp    ->  continuation flag (should be FALSE the first time
 *          isheader() is called on a message.  isheader() sets
 *          it for the remaining calls to that message)
 * returns
 *  FALSE   ->  not header line
 *  H_*     ->  type of header line found.
 */
int
isheader(lp, ctfp)
char    *lp;
int *ctfp;
{
    register char   *p, *q;
    register int    i;

    p = lp;
    while((*p) && (*p != '\n') && (isspace(*p))) {
        p++;
    }
    if((*p == NULL) || (*p == '\n')) {
        /* blank line */
        return (FALSE);
    }

    if ((*ctfp) && ((*lp == ' ') || (*lp == '\t'))) {
        return(H_CONT);
    }

    *ctfp = FALSE;
    for (i = 1; i < H_CONT; i++) {
        if (!isit(lp, i)) {
            continue;
        }
        if ((i == H_FROM) || (i == H_FROM1)) {
            /*
             * Should NEVER get 'From ' or '>From ' line on stdin
             * if invoked as mail (rather than rmail) since
             * 'From ' and/or '>From ' lines are generated by
             * program itself. Therefore, if it DOES match and
             * ismail == TRUE, it must be part of the content.
             */
            if (sending && ismail && !deliverflag) {
                return (FALSE);
            }
        }
        *ctfp = TRUE;
        return (i);
    }
    /*
     * Check if name: value pair
     */
    if ((p = strpbrk(lp, ":")) != NULL ) {
        for(q = lp; q < p; q++)  {
            if ((*q == ' ') || (!isprint(*q)))  {
                return(FALSE);
            }
        }
        *ctfp = TRUE;
        return(H_NAMEVALUE);
    }
    return(FALSE);
}