689 lines
13 KiB
C
689 lines
13 KiB
C
/* $NetBSD: support.c,v 1.1 2001/10/19 02:46:19 tv Exp $ */
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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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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)aux.c 8.1 (Berkeley) 6/6/93";
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#else
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__RCSID("$NetBSD: support.c,v 1.1 2001/10/19 02:46:19 tv Exp $");
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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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/*
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* Mail -- a mail program
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*
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* Auxiliary functions.
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*/
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static char *save2str __P((char *, char *));
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/*
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* Return a pointer to a dynamic copy of the argument.
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*/
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char *
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savestr(str)
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const char *str;
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{
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char *new;
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int size = strlen(str) + 1;
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if ((new = salloc(size)) != NOSTR)
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memmove(new, str, size);
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return new;
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}
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/*
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* Make a copy of new argument incorporating old one.
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*/
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static char *
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save2str(str, old)
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char *str, *old;
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{
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char *new;
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int newsize = strlen(str) + 1;
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int oldsize = old ? strlen(old) + 1 : 0;
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if ((new = salloc(newsize + oldsize)) != NOSTR) {
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if (oldsize) {
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memmove(new, old, oldsize);
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new[oldsize - 1] = ' ';
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}
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memmove(new + oldsize, str, newsize);
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}
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return new;
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}
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/*
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* Touch the named message by setting its MTOUCH flag.
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* Touched messages have the effect of not being sent
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* back to the system mailbox on exit.
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*/
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void
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touch(mp)
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struct message *mp;
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{
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mp->m_flag |= MTOUCH;
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if ((mp->m_flag & MREAD) == 0)
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mp->m_flag |= MREAD|MSTATUS;
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}
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/*
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* Test to see if the passed file name is a directory.
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* Return true if it is.
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*/
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int
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isdir(name)
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char name[];
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{
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struct stat sbuf;
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if (stat(name, &sbuf) < 0)
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return(0);
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return (S_ISDIR(sbuf.st_mode));
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}
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/*
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* Count the number of arguments in the given string raw list.
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*/
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int
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argcount(argv)
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char **argv;
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{
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char **ap;
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for (ap = argv; *ap++ != NOSTR;)
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;
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return ap - argv - 1;
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}
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/*
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* Return the desired header line from the passed message
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* pointer (or NOSTR if the desired header field is not available).
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*/
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char *
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hfield(field, mp)
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char field[];
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struct message *mp;
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{
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FILE *ibuf;
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char linebuf[LINESIZE];
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int lc;
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char *hfield;
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char *colon, *oldhfield = NOSTR;
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ibuf = setinput(mp);
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if ((lc = mp->m_lines - 1) < 0)
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return NOSTR;
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if (readline(ibuf, linebuf, LINESIZE) < 0)
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return NOSTR;
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while (lc > 0) {
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if ((lc = gethfield(ibuf, linebuf, lc, &colon)) < 0)
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return oldhfield;
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if ((hfield = ishfield(linebuf, colon, field)) != NULL)
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oldhfield = save2str(hfield, oldhfield);
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}
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return oldhfield;
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}
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/*
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* Return the next header field found in the given message.
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* Return >= 0 if something found, < 0 elsewise.
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* "colon" is set to point to the colon in the header.
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* Must deal with \ continuations & other such fraud.
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*/
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int
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gethfield(f, linebuf, rem, colon)
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FILE *f;
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char linebuf[];
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int rem;
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char **colon;
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{
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char line2[LINESIZE];
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char *cp, *cp2;
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int c;
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for (;;) {
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if (--rem < 0)
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return -1;
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if ((c = readline(f, linebuf, LINESIZE)) <= 0)
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return -1;
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for (cp = linebuf; isprint((unsigned char)*cp) && *cp != ' ' && *cp != ':';
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cp++)
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;
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if (*cp != ':' || cp == linebuf)
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continue;
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/*
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* I guess we got a headline.
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* Handle wraparounding
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*/
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*colon = cp;
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cp = linebuf + c;
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for (;;) {
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while (--cp >= linebuf && (*cp == ' ' || *cp == '\t'))
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;
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cp++;
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if (rem <= 0)
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break;
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ungetc(c = getc(f), f);
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if (c != ' ' && c != '\t')
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break;
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if ((c = readline(f, line2, LINESIZE)) < 0)
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break;
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rem--;
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for (cp2 = line2; *cp2 == ' ' || *cp2 == '\t'; cp2++)
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;
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c -= cp2 - line2;
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if (cp + c >= linebuf + LINESIZE - 2)
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break;
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*cp++ = ' ';
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memmove(cp, cp2, c);
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cp += c;
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}
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*cp = 0;
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return rem;
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}
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/* NOTREACHED */
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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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ishfield(linebuf, colon, field)
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char linebuf[], field[];
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char *colon;
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{
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char *cp = colon;
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*cp = 0;
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if (strcasecmp(linebuf, field) != 0) {
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*cp = ':';
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return 0;
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}
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*cp = ':';
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for (cp++; *cp == ' ' || *cp == '\t'; cp++)
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;
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return cp;
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}
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/*
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* Copy a string, lowercasing it as we go.
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*/
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void
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istrcpy(dest, src)
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char *dest, *src;
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{
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do {
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if (isupper((unsigned char)*src))
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*dest++ = tolower(*src);
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else
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*dest++ = *src;
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} while (*src++ != 0);
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}
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/*
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* The following code deals with input stacking to do source
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* commands. All but the current file pointer are saved on
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* the stack.
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*/
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static int ssp; /* Top of file stack */
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struct sstack {
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FILE *s_file; /* File we were in. */
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int s_cond; /* Saved state of conditionals */
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int s_loading; /* Loading .mailrc, etc. */
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} sstack[NOFILE];
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/*
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* Pushdown current input file and switch to a new one.
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* Set the global flag "sourcing" so that others will realize
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* that they are no longer reading from a tty (in all probability).
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*/
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int
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source(v)
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void *v;
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{
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char **arglist = v;
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FILE *fi;
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char *cp;
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if ((cp = expand(*arglist)) == NOSTR)
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return(1);
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if ((fi = Fopen(cp, "r")) == NULL) {
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perror(cp);
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return(1);
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}
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if (ssp >= NOFILE - 1) {
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printf("Too much \"sourcing\" going on.\n");
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Fclose(fi);
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return(1);
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}
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sstack[ssp].s_file = input;
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sstack[ssp].s_cond = cond;
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sstack[ssp].s_loading = loading;
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ssp++;
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loading = 0;
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cond = CANY;
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input = fi;
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sourcing++;
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return(0);
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}
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/*
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* Pop the current input back to the previous level.
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* Update the "sourcing" flag as appropriate.
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*/
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int
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unstack()
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{
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if (ssp <= 0) {
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printf("\"Source\" stack over-pop.\n");
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sourcing = 0;
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return(1);
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}
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Fclose(input);
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if (cond != CANY)
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printf("Unmatched \"if\"\n");
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ssp--;
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cond = sstack[ssp].s_cond;
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loading = sstack[ssp].s_loading;
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input = sstack[ssp].s_file;
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if (ssp == 0)
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sourcing = loading;
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return(0);
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}
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/*
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* Touch the indicated file.
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* This is nifty for the shell.
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*/
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void
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alter(name)
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char *name;
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{
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struct stat sb;
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struct timeval tv[2];
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if (stat(name, &sb))
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return;
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(void) gettimeofday(&tv[0], (struct timezone *)0);
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tv[0].tv_sec++;
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TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec);
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(void) utimes(name, tv);
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}
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/*
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* Examine the passed line buffer and
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* return true if it is all blanks and tabs.
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*/
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int
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blankline(linebuf)
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char linebuf[];
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{
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char *cp;
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for (cp = linebuf; *cp; cp++)
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if (*cp != ' ' && *cp != '\t')
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return(0);
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return(1);
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}
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/*
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* Get sender's name from this message. If the message has
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* a bunch of arpanet stuff in it, we may have to skin the name
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* before returning it.
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*/
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char *
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nameof(mp, reptype)
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struct message *mp;
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int reptype;
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{
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char *cp, *cp2;
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cp = skin(name1(mp, reptype));
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if (reptype != 0 || charcount(cp, '!') < 2)
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return(cp);
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cp2 = strrchr(cp, '!');
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cp2--;
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while (cp2 > cp && *cp2 != '!')
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cp2--;
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if (*cp2 == '!')
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return(cp2 + 1);
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return(cp);
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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(cp)
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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 cp;
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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(name)
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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[BUFSIZ];
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if (name == NOSTR)
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return(NOSTR);
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if (strchr(name, '(') == NOSTR && strchr(name, '<') == NOSTR
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&& strchr(name, ' ') == NOSTR)
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return(name);
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gotlt = 0;
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lastsp = 0;
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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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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 != '\\')
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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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else
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lastsp = 1;
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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) && 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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return(savestr(nbuf));
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}
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/*
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* Fetch the sender's name from the passed message.
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* Reptype can be
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* 0 -- get sender's name for display purposes
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* 1 -- get sender's name for reply
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* 2 -- get sender's name for Reply
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*/
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char *
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name1(mp, reptype)
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struct message *mp;
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int reptype;
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{
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char namebuf[LINESIZE];
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char linebuf[LINESIZE];
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char *cp, *cp2;
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FILE *ibuf;
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int first = 1;
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if ((cp = hfield("from", mp)) != NOSTR)
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return cp;
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if (reptype == 0 && (cp = hfield("sender", mp)) != NOSTR)
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return cp;
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ibuf = setinput(mp);
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namebuf[0] = '\0';
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if (readline(ibuf, linebuf, LINESIZE) < 0)
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return(savestr(namebuf));
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newname:
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for (cp = linebuf; *cp && *cp != ' '; cp++)
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;
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for (; *cp == ' ' || *cp == '\t'; cp++)
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;
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for (cp2 = &namebuf[strlen(namebuf)];
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*cp && *cp != ' ' && *cp != '\t' && cp2 < namebuf + LINESIZE - 1;)
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*cp2++ = *cp++;
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*cp2 = '\0';
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if (readline(ibuf, linebuf, LINESIZE) < 0)
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return(savestr(namebuf));
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if ((cp = strchr(linebuf, 'F')) == NULL)
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return(savestr(namebuf));
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if (strncmp(cp, "From", 4) != 0)
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return(savestr(namebuf));
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while ((cp = strchr(cp, 'r')) != NULL) {
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if (strncmp(cp, "remote", 6) == 0) {
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if ((cp = strchr(cp, 'f')) == NULL)
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break;
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if (strncmp(cp, "from", 4) != 0)
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break;
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if ((cp = strchr(cp, ' ')) == NULL)
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break;
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cp++;
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if (first) {
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cp2 = namebuf;
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first = 0;
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} else
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cp2 = strrchr(namebuf, '!') + 1;
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while (*cp && cp2 < namebuf + LINESIZE - 1)
|
|
*cp2++ = *cp++;
|
|
if (cp2 < namebuf + LINESIZE - 1)
|
|
*cp2++ = '!';
|
|
*cp2 = '\0';
|
|
if (cp2 < namebuf + LINESIZE - 1)
|
|
goto newname;
|
|
else
|
|
break;
|
|
}
|
|
cp++;
|
|
}
|
|
return(savestr(namebuf));
|
|
}
|
|
|
|
/*
|
|
* Count the occurances of c in str
|
|
*/
|
|
int
|
|
charcount(str, c)
|
|
char *str;
|
|
int c;
|
|
{
|
|
char *cp;
|
|
int i;
|
|
|
|
for (i = 0, cp = str; *cp; cp++)
|
|
if (*cp == c)
|
|
i++;
|
|
return(i);
|
|
}
|
|
|
|
/*
|
|
* Are any of the characters in the two strings the same?
|
|
*/
|
|
int
|
|
anyof(s1, s2)
|
|
char *s1, *s2;
|
|
{
|
|
|
|
while (*s1)
|
|
if (strchr(s2, *s1++))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Convert c to upper case
|
|
*/
|
|
int
|
|
upcase(c)
|
|
int c;
|
|
{
|
|
|
|
if (islower(c))
|
|
return toupper(c);
|
|
return c;
|
|
}
|
|
|
|
/*
|
|
* Copy s1 to s2, return pointer to null in s2.
|
|
*/
|
|
char *
|
|
copy(s1, s2)
|
|
char *s1, *s2;
|
|
{
|
|
|
|
while ((*s2++ = *s1++) != '\0')
|
|
;
|
|
return s2 - 1;
|
|
}
|
|
|
|
/*
|
|
* See if the given header field is supposed to be ignored.
|
|
*/
|
|
int
|
|
isign(field, ignore)
|
|
char *field;
|
|
struct ignoretab ignore[2];
|
|
{
|
|
char realfld[LINESIZE];
|
|
|
|
if (ignore == ignoreall)
|
|
return 1;
|
|
/*
|
|
* Lower-case the string, so that "Status" and "status"
|
|
* will hash to the same place.
|
|
*/
|
|
istrcpy(realfld, field);
|
|
if (ignore[1].i_count > 0)
|
|
return (!member(realfld, ignore + 1));
|
|
else
|
|
return (member(realfld, ignore));
|
|
}
|
|
|
|
int
|
|
member(realfield, table)
|
|
char *realfield;
|
|
struct ignoretab *table;
|
|
{
|
|
struct ignore *igp;
|
|
|
|
for (igp = table->i_head[hash(realfield)]; igp != 0; igp = igp->i_link)
|
|
if (*igp->i_field == *realfield &&
|
|
equal(igp->i_field, realfield))
|
|
return (1);
|
|
return (0);
|
|
}
|