335 lines
6.9 KiB
C
Executable File
335 lines
6.9 KiB
C
Executable File
/*
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* Heirloom mailx - a mail user agent derived from Berkeley Mail.
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*
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* Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
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*/
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/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#ifdef DOSCCS
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static char sccsid[] = "@(#)head.c 2.17 (gritter) 3/4/06";
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#endif
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#endif /* not lint */
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#include "rcv.h"
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#include "extern.h"
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#include <time.h>
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/*
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* Mail -- a mail program
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*
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* Routines for processing and detecting headlines.
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*/
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/*
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* Check whether the passed line is a header line of
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* the desired breed. Return the field body, or 0.
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*/
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char *
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thisfield(const char *linebuf, const char *field)
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{
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while (lowerconv(*linebuf&0377) == lowerconv(*field&0377)) {
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linebuf++;
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field++;
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}
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if (*field != '\0')
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return NULL;
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while (blankchar(*linebuf&0377))
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linebuf++;
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if (*linebuf++ != ':')
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return NULL;
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while (blankchar(*linebuf&0377))
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linebuf++;
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return (char *)linebuf;
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}
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/*
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* Start of a "comment".
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* Ignore it.
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*/
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char *
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skip_comment(const char *cp)
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{
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int nesting = 1;
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for (; nesting > 0 && *cp; cp++) {
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switch (*cp) {
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case '\\':
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if (cp[1])
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cp++;
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break;
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case '(':
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nesting++;
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break;
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case ')':
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nesting--;
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break;
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}
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}
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return (char *)cp;
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}
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/*
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* Return the start of a route-addr (address in angle brackets),
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* if present.
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*/
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char *
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routeaddr(const char *name)
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{
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const char *np, *rp = NULL;
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for (np = name; *np; np++) {
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switch (*np) {
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case '(':
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np = skip_comment(&np[1]) - 1;
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break;
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case '"':
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while (*np) {
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if (*++np == '"')
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break;
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if (*np == '\\' && np[1])
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np++;
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}
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break;
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case '<':
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rp = np;
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break;
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case '>':
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return (char *)rp;
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}
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}
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return NULL;
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}
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/*
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* Skin an arpa net address according to the RFC 822 interpretation
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* of "host-phrase."
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*/
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char *
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skin(char *name)
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{
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int c;
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char *cp, *cp2;
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char *bufend;
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int gotlt, lastsp;
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char *nbuf;
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if (name == NULL)
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return(NULL);
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if (strchr(name, '(') == NULL && strchr(name, '<') == NULL
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&& strchr(name, ' ') == NULL)
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return(name);
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gotlt = 0;
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lastsp = 0;
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nbuf = ac_alloc(strlen(name) + 1);
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bufend = nbuf;
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for (cp = name, cp2 = bufend; (c = *cp++) != '\0'; ) {
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switch (c) {
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case '(':
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cp = skip_comment(cp);
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lastsp = 0;
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break;
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case '"':
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/*
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* Start of a "quoted-string".
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* Copy it in its entirety.
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*/
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*cp2++ = c;
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while ((c = *cp) != '\0') {
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cp++;
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if (c == '"') {
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*cp2++ = c;
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break;
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}
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if (c != '\\')
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*cp2++ = c;
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else if ((c = *cp) != '\0') {
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*cp2++ = c;
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cp++;
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}
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}
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lastsp = 0;
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break;
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case ' ':
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if (cp[0] == 'a' && cp[1] == 't' && cp[2] == ' ')
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cp += 3, *cp2++ = '@';
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else
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if (cp[0] == '@' && cp[1] == ' ')
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cp += 2, *cp2++ = '@';
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#if 0
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/*
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* RFC 822 specifies spaces are STRIPPED when
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* in an adress specifier.
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*/
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else
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lastsp = 1;
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#endif
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break;
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case '<':
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cp2 = bufend;
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gotlt++;
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lastsp = 0;
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break;
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case '>':
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if (gotlt) {
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gotlt = 0;
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while ((c = *cp) != '\0' && c != ',') {
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cp++;
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if (c == '(')
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cp = skip_comment(cp);
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else if (c == '"')
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while ((c = *cp) != '\0') {
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cp++;
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if (c == '"')
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break;
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if (c == '\\' && *cp)
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cp++;
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}
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}
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lastsp = 0;
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break;
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}
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/* Fall into . . . */
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default:
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if (lastsp) {
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lastsp = 0;
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*cp2++ = ' ';
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}
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*cp2++ = c;
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if (c == ',' && !gotlt) {
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*cp2++ = ' ';
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for (; *cp == ' '; cp++)
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;
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lastsp = 0;
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bufend = cp2;
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}
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}
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}
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*cp2 = 0;
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cp = savestr(nbuf);
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ac_free(nbuf);
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return cp;
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}
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char *
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nexttoken(char *cp)
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{
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for (;;) {
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if (*cp == '\0')
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return NULL;
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if (*cp == '(') {
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int nesting = 0;
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while (*cp != '\0') {
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switch (*cp++) {
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case '(':
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nesting++;
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break;
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case ')':
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nesting--;
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break;
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}
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if (nesting <= 0)
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break;
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}
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} else if (blankchar(*cp & 0377) || *cp == ',')
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cp++;
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else
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break;
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}
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return cp;
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}
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#define leapyear(year) ((year % 100 ? year : year / 100) % 4 == 0)
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time_t
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combinetime(int year, int month, int day, int hour, int minute, int second)
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{
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time_t t;
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if (second < 0 || minute < 0 || hour < 0 || day < 1)
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return -1;
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t = second + minute * 60 + hour * 3600 + (day - 1) * 86400;
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if (year < 70)
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year += 2000;
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else if (year < 1900)
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year += 1900;
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if (month > 1)
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t += 86400 * 31;
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if (month > 2)
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t += 86400 * (leapyear(year) ? 29 : 28);
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if (month > 3)
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t += 86400 * 31;
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if (month > 4)
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t += 86400 * 30;
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if (month > 5)
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t += 86400 * 31;
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if (month > 6)
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t += 86400 * 30;
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if (month > 7)
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t += 86400 * 31;
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if (month > 8)
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t += 86400 * 31;
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if (month > 9)
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t += 86400 * 30;
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if (month > 10)
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t += 86400 * 31;
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if (month > 11)
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t += 86400 * 30;
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year -= 1900;
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t += (year - 70) * 31536000 + ((year - 69) / 4) * 86400 -
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((year - 1) / 100) * 86400 + ((year + 299) / 400) * 86400;
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return t;
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}
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int
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check_from_and_sender(struct name *fromfield, struct name *senderfield)
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{
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if (fromfield && fromfield->n_flink && senderfield == NULL) {
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DEBUG_ERROR("A Sender: field is required with multiple "
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"addresses in From: field.\n");
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return 1;
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}
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if (senderfield && senderfield->n_flink) {
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DEBUG_ERROR("The Sender: field may contain "
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"only one address.\n");
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return 2;
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}
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return 0;
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}
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