260 lines
6.0 KiB
C
260 lines
6.0 KiB
C
/*
|
|
* Copyright (c) 1980, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "from: @(#)head.c 8.1 (Berkeley) 6/6/93";
|
|
static char rcsid[] = "$Id: head.c,v 1.4 1994/12/18 23:33:48 glass Exp $";
|
|
#endif /* not lint */
|
|
|
|
#include "rcv.h"
|
|
#include "extern.h"
|
|
|
|
/*
|
|
* Mail -- a mail program
|
|
*
|
|
* Routines for processing and detecting headlines.
|
|
*/
|
|
|
|
/*
|
|
* See if the passed line buffer is a mail header.
|
|
* Return true if yes. Note the extreme pains to
|
|
* accomodate all funny formats.
|
|
*/
|
|
int
|
|
ishead(linebuf)
|
|
char linebuf[];
|
|
{
|
|
register char *cp;
|
|
struct headline hl;
|
|
char parbuf[BUFSIZ];
|
|
|
|
cp = linebuf;
|
|
if (*cp++ != 'F' || *cp++ != 'r' || *cp++ != 'o' || *cp++ != 'm' ||
|
|
*cp++ != ' ')
|
|
return (0);
|
|
parse(linebuf, &hl, parbuf);
|
|
if (hl.l_from == NOSTR || hl.l_date == NOSTR) {
|
|
fail(linebuf, "No from or date field");
|
|
return (0);
|
|
}
|
|
if (!isdate(hl.l_date)) {
|
|
fail(linebuf, "Date field not legal date");
|
|
return (0);
|
|
}
|
|
/*
|
|
* I guess we got it!
|
|
*/
|
|
return (1);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
void
|
|
fail(linebuf, reason)
|
|
char linebuf[], reason[];
|
|
{
|
|
|
|
/*
|
|
if (value("debug") == NOSTR)
|
|
return;
|
|
fprintf(stderr, "\"%s\"\nnot a header because %s\n", linebuf, reason);
|
|
*/
|
|
}
|
|
|
|
/*
|
|
* Split a headline into its useful components.
|
|
* Copy the line into dynamic string space, then set
|
|
* pointers into the copied line in the passed headline
|
|
* structure. Actually, it scans.
|
|
*/
|
|
void
|
|
parse(line, hl, pbuf)
|
|
char line[], pbuf[];
|
|
register struct headline *hl;
|
|
{
|
|
register char *cp;
|
|
char *sp;
|
|
char word[LINESIZE];
|
|
|
|
hl->l_from = NOSTR;
|
|
hl->l_tty = NOSTR;
|
|
hl->l_date = NOSTR;
|
|
cp = line;
|
|
sp = pbuf;
|
|
/*
|
|
* Skip over "From" first.
|
|
*/
|
|
cp = nextword(cp, word);
|
|
cp = nextword(cp, word);
|
|
if (*word)
|
|
hl->l_from = copyin(word, &sp);
|
|
if (cp != NOSTR && cp[0] == 't' && cp[1] == 't' && cp[2] == 'y') {
|
|
cp = nextword(cp, word);
|
|
hl->l_tty = copyin(word, &sp);
|
|
}
|
|
if (cp != NOSTR)
|
|
hl->l_date = copyin(cp, &sp);
|
|
}
|
|
|
|
/*
|
|
* Copy the string on the left into the string on the right
|
|
* and bump the right (reference) string pointer by the length.
|
|
* Thus, dynamically allocate space in the right string, copying
|
|
* the left string into it.
|
|
*/
|
|
char *
|
|
copyin(src, space)
|
|
register char *src;
|
|
char **space;
|
|
{
|
|
register char *cp;
|
|
char *top;
|
|
|
|
top = cp = *space;
|
|
while (*cp++ = *src++)
|
|
;
|
|
*space = cp;
|
|
return (top);
|
|
}
|
|
|
|
/*
|
|
* Test to see if the passed string is a ctime(3) generated
|
|
* date string as documented in the manual. The template
|
|
* below is used as the criterion of correctness.
|
|
* Also, we check for a possible trailing time zone using
|
|
* the tmztype template.
|
|
*/
|
|
|
|
/*
|
|
* 'A' An upper case char
|
|
* 'a' A lower case char
|
|
* ' ' A space
|
|
* '0' A digit
|
|
* 'O' An optional digit or space
|
|
* ':' A colon
|
|
* 'N' A new line
|
|
*/
|
|
char ctype[] = "Aaa Aaa O0 00:00:00 0000";
|
|
char ctype_without_secs[] = "Aaa Aaa O0 00:00 0000";
|
|
char tmztype[] = "Aaa Aaa O0 00:00:00 AAA 0000";
|
|
char tmztype_without_secs[] = "Aaa Aaa O0 00:00 AAA 0000";
|
|
|
|
int
|
|
isdate(date)
|
|
char date[];
|
|
{
|
|
|
|
return cmatch(date, ctype_without_secs) ||
|
|
cmatch(date, tmztype_without_secs) ||
|
|
cmatch(date, ctype) || cmatch(date, tmztype);
|
|
}
|
|
|
|
/*
|
|
* Match the given string (cp) against the given template (tp).
|
|
* Return 1 if they match, 0 if they don't
|
|
*/
|
|
int
|
|
cmatch(cp, tp)
|
|
register char *cp, *tp;
|
|
{
|
|
|
|
while (*cp && *tp)
|
|
switch (*tp++) {
|
|
case 'a':
|
|
if (!islower(*cp++))
|
|
return 0;
|
|
break;
|
|
case 'A':
|
|
if (!isupper(*cp++))
|
|
return 0;
|
|
break;
|
|
case ' ':
|
|
if (*cp++ != ' ')
|
|
return 0;
|
|
break;
|
|
case '0':
|
|
if (!isdigit(*cp++))
|
|
return 0;
|
|
break;
|
|
case 'O':
|
|
if (*cp != ' ' && !isdigit(*cp))
|
|
return 0;
|
|
cp++;
|
|
break;
|
|
case ':':
|
|
if (*cp++ != ':')
|
|
return 0;
|
|
break;
|
|
case 'N':
|
|
if (*cp++ != '\n')
|
|
return 0;
|
|
break;
|
|
}
|
|
if (*cp || *tp)
|
|
return 0;
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Collect a liberal (space, tab delimited) word into the word buffer
|
|
* passed. Also, return a pointer to the next word following that,
|
|
* or NOSTR if none follow.
|
|
*/
|
|
char *
|
|
nextword(wp, wbuf)
|
|
register char *wp, *wbuf;
|
|
{
|
|
register c;
|
|
|
|
if (wp == NOSTR) {
|
|
*wbuf = 0;
|
|
return (NOSTR);
|
|
}
|
|
while ((c = *wp++) && c != ' ' && c != '\t') {
|
|
*wbuf++ = c;
|
|
if (c == '"') {
|
|
while ((c = *wp++) && c != '"')
|
|
*wbuf++ = c;
|
|
if (c == '"')
|
|
*wbuf++ = c;
|
|
else
|
|
wp--;
|
|
}
|
|
}
|
|
*wbuf = '\0';
|
|
for (; c == ' ' || c == '\t'; c = *wp++)
|
|
;
|
|
if (c == 0)
|
|
return (NOSTR);
|
|
return (wp - 1);
|
|
}
|