748 lines
15 KiB
C
748 lines
15 KiB
C
/* $NetBSD: support.c,v 1.23 2011/05/24 12:33:22 joerg 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. 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 1.23 2011/05/24 12:33:22 joerg Exp $");
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#endif
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#endif /* not lint */
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#include <stdarg.h>
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#include <util.h>
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#include "rcv.h"
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#include "extern.h"
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#include "mime.h"
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#include "thread.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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/*
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* Return a pointer to a dynamic copy of the argument.
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*/
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PUBLIC char *
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savestr(const char *str)
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{
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char *new;
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size_t size = strlen(str) + 1;
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if ((new = salloc(size)) != NULL)
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(void)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(char *str, char *old)
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{
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char *new;
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size_t newsize = strlen(str) + 1;
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size_t oldsize = old ? strlen(old) + 1 : 0;
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if ((new = salloc(newsize + oldsize)) != NULL) {
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if (oldsize) {
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(void)memmove(new, old, oldsize);
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new[oldsize - 1] = ' ';
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}
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(void)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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* Like asprintf(), but with result salloc-ed rather than malloc-ed.
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*/
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PUBLIC int
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sasprintf(char **ret, const char *format, ...)
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{
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int rval;
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char *p;
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va_list args;
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va_start(args, format);
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rval = evasprintf(&p, format, args);
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*ret = savestr(p);
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free(p);
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va_end(args);
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return rval;
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}
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struct set_m_flag_args_s {
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int and_bits;
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int xor_bits;
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};
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static int
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set_m_flag_core(struct message *mp, void *v)
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{
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struct set_m_flag_args_s *args;
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args = v;
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mp->m_flag &= args->and_bits;
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mp->m_flag ^= args->xor_bits;
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return 0;
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}
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PUBLIC struct message *
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set_m_flag(int msgnum, int and_bits, int xor_bits)
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{
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struct message *mp;
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struct set_m_flag_args_s args;
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mp = get_message(msgnum);
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args.and_bits = and_bits;
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args.xor_bits = xor_bits;
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(void)thread_recursion(mp, set_m_flag_core, &args);
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return mp;
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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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PUBLIC void
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touch(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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PUBLIC int
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isdir(const 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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PUBLIC int
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argcount(char **argv)
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{
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char **ap;
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for (ap = argv; *ap++ != NULL; /*EMPTY*/)
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continue;
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return (int)(ap - argv - 1);
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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 NULL.
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*/
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static char*
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ishfield(const char linebuf[], char *colon, const char field[])
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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 NULL;
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}
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*cp = ':';
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for (cp++; is_WSP(*cp); cp++)
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continue;
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return cp;
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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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* WARNING - do not call this outside hfield() or decoding will not
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* get done.
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*/
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static int
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gethfield(FILE *f, char linebuf[], int rem, 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)) <= 0)
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return -1;
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for (cp = linebuf;
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isprint((unsigned char)*cp) && *cp != ' ' && *cp != ':';
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cp++)
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continue;
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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 && is_WSP(*cp))
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continue;
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cp++;
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if (rem <= 0)
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break;
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(void)ungetc(c = getc(f), f);
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if (!is_WSP(c))
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break;
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if ((c = readline(f, line2, LINESIZE, 0)) < 0)
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break;
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rem--;
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cp2 = skip_WSP(line2);
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c -= (int)(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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(void)memmove(cp, cp2, (size_t)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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* Return the desired header line from the passed message
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* pointer (or NULL if the desired header field is not available).
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*/
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PUBLIC char *
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hfield(const char field[], const 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 *headerfield;
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char *colon, *oldhfield = NULL;
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#ifdef MIME_SUPPORT
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int decode;
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decode = value(ENAME_MIME_DECODE_MSG) &&
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value(ENAME_MIME_DECODE_HDR);
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#endif
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ibuf = setinput(mp);
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if ((lc = (int)(mp->m_lines - 1)) < 0)
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return NULL;
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if (readline(ibuf, linebuf, LINESIZE, 0) < 0)
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return NULL;
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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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#ifdef MIME_SUPPORT
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if ((headerfield = ishfield(linebuf, colon, field)) != NULL) {
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char linebuf2[LINESIZE];
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if (decode)
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headerfield = mime_decode_hfield(linebuf2,
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sizeof(linebuf2), linebuf, headerfield);
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oldhfield = save2str(headerfield, oldhfield);
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}
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#else
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if ((headerfield = ishfield(linebuf, colon, field)) != NULL)
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oldhfield = save2str(headerfield, oldhfield);
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#endif
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}
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return oldhfield;
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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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PUBLIC void
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istrcpy(char *dest, const char *src)
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{
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do {
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*dest++ = tolower((unsigned char)*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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static 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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#ifdef NEW_CONDITIONAL
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struct cond_stack_s *s_cond_stack; /* Saved conditional stack */
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#endif
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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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PUBLIC int
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source(void *v)
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{
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char **arglist = v;
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FILE *fi;
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const char *cp;
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if ((cp = expand(*arglist)) == NULL)
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return 1;
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if ((fi = Fopen(cp, "r")) == NULL) {
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warn("%s", cp);
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return 1;
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}
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if (ssp >= NOFILE - 1) {
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(void)printf("Too much \"sourcing\" going on.\n");
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(void)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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#ifdef NEW_CONDITIONAL
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sstack[ssp].s_cond_stack = cond_stack;
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#endif
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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 = CNONE;
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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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PUBLIC int
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unstack(void)
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{
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if (ssp <= 0) {
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(void)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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(void)Fclose(input);
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if (cond != CNONE || cond_stack != NULL)
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(void)printf("Unmatched \"if\"\n");
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ssp--;
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input = sstack[ssp].s_file;
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cond = sstack[ssp].s_cond;
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#ifdef NEW_CONDITIONAL
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cond_stack = sstack[ssp].s_cond_stack;
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#endif
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loading = sstack[ssp].s_loading;
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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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PUBLIC void
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alter(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], NULL);
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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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PUBLIC int
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blankline(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 (!is_WSP(*cp))
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return 0;
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return 1;
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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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static char *
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skip_comment(char *cp)
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{
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int nesting = 1;
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for (/*EMPTY*/; 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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/*
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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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PUBLIC 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[LINESIZE];
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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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bufend = nbuf;
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for (cp = name, cp2 = bufend; (c = *cp++) != '\0'; /*EMPTY*/) {
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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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|
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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;
|
|
|
|
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;
|
|
|
|
case '<':
|
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cp2 = bufend;
|
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gotlt++;
|
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lastsp = 0;
|
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break;
|
|
|
|
case '>':
|
|
if (gotlt) {
|
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gotlt = 0;
|
|
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 == '"')
|
|
while ((c = *cp) != '\0') {
|
|
cp++;
|
|
if (c == '"')
|
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break;
|
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if (c == '\\' && *cp)
|
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cp++;
|
|
}
|
|
}
|
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lastsp = 0;
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
|
|
default:
|
|
if (lastsp) {
|
|
lastsp = 0;
|
|
*cp2++ = ' ';
|
|
}
|
|
*cp2++ = c;
|
|
if (c == ',' && !gotlt) {
|
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*cp2++ = ' ';
|
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for (/*EMPTY*/; *cp == ' '; cp++)
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continue;
|
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lastsp = 0;
|
|
bufend = cp2;
|
|
}
|
|
}
|
|
}
|
|
*cp2 = 0;
|
|
|
|
return savestr(nbuf);
|
|
}
|
|
|
|
/*
|
|
* Fetch the sender's name from the passed message.
|
|
* Reptype can be
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|
* 0 -- get sender's name for display purposes
|
|
* 1 -- get sender's name for reply
|
|
* 2 -- get sender's name for Reply
|
|
*/
|
|
static char *
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|
name1(struct message *mp, int reptype)
|
|
{
|
|
char namebuf[LINESIZE];
|
|
char linebuf[LINESIZE];
|
|
char *cp, *cp2;
|
|
FILE *ibuf;
|
|
int firstrun = 1;
|
|
|
|
if ((cp = hfield("from", mp)) != NULL)
|
|
return cp;
|
|
if (reptype == 0 && (cp = hfield("sender", mp)) != NULL)
|
|
return cp;
|
|
ibuf = setinput(mp);
|
|
namebuf[0] = '\0';
|
|
if (readline(ibuf, linebuf, LINESIZE, 0) < 0)
|
|
return savestr(namebuf);
|
|
newname:
|
|
for (cp = linebuf; *cp && *cp != ' '; cp++)
|
|
continue;
|
|
cp = skip_WSP(cp);
|
|
for (cp2 = &namebuf[strlen(namebuf)];
|
|
*cp && !is_WSP(*cp) && cp2 < namebuf + LINESIZE - 1;
|
|
/*EMPTY*/)
|
|
*cp2++ = *cp++;
|
|
*cp2 = '\0';
|
|
if (readline(ibuf, linebuf, LINESIZE, 0) < 0)
|
|
return savestr(namebuf);
|
|
if ((cp = strchr(linebuf, 'F')) == NULL)
|
|
return savestr(namebuf);
|
|
if (strncmp(cp, "From", 4) != 0)
|
|
return savestr(namebuf);
|
|
while ((cp = strchr(cp, 'r')) != NULL) {
|
|
if (strncmp(cp, "remote", 6) == 0) {
|
|
if ((cp = strchr(cp, 'f')) == NULL)
|
|
break;
|
|
if (strncmp(cp, "from", 4) != 0)
|
|
break;
|
|
if ((cp = strchr(cp, ' ')) == NULL)
|
|
break;
|
|
cp++;
|
|
if (firstrun) {
|
|
cp2 = namebuf;
|
|
firstrun = 0;
|
|
} else
|
|
cp2 = strrchr(namebuf, '!') + 1;
|
|
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 occurrences of c in str
|
|
*/
|
|
static int
|
|
charcount(char *str, int c)
|
|
{
|
|
char *cp;
|
|
int i;
|
|
|
|
for (i = 0, cp = str; *cp; cp++)
|
|
if (*cp == c)
|
|
i++;
|
|
return i;
|
|
}
|
|
|
|
/*
|
|
* Get sender's name from this message. If the message has
|
|
* a bunch of arpanet stuff in it, we may have to skin the name
|
|
* before returning it.
|
|
*/
|
|
PUBLIC char *
|
|
nameof(struct message *mp, int reptype)
|
|
{
|
|
char *cp, *cp2;
|
|
|
|
cp = skin(name1(mp, reptype));
|
|
if (reptype != 0 || charcount(cp, '!') < 2)
|
|
return cp;
|
|
cp2 = strrchr(cp, '!');
|
|
cp2--;
|
|
while (cp2 > cp && *cp2 != '!')
|
|
cp2--;
|
|
if (*cp2 == '!')
|
|
return cp2 + 1;
|
|
return cp;
|
|
}
|
|
|
|
/*
|
|
* Copy s1 to s2, return pointer to null in s2.
|
|
*/
|
|
PUBLIC char *
|
|
copy(char *s1, char *s2)
|
|
{
|
|
|
|
while ((*s2++ = *s1++) != '\0')
|
|
continue;
|
|
return s2 - 1;
|
|
}
|
|
|
|
/*
|
|
* The core routine to check the ignore table for a field.
|
|
* Note: realfield should be lower-cased!
|
|
*/
|
|
PUBLIC int
|
|
member(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;
|
|
}
|
|
|
|
/*
|
|
* See if the given header field is supposed to be ignored.
|
|
*/
|
|
PUBLIC int
|
|
isign(const char *field, struct ignoretab ignoretabs[2])
|
|
{
|
|
char realfld[LINESIZE];
|
|
|
|
if (ignoretabs == ignoreall)
|
|
return 1;
|
|
/*
|
|
* Lower-case the string, so that "Status" and "status"
|
|
* will hash to the same place.
|
|
*/
|
|
istrcpy(realfld, field);
|
|
if (ignoretabs[1].i_count > 0)
|
|
return !member(realfld, ignoretabs + 1);
|
|
else
|
|
return member(realfld, ignoretabs);
|
|
}
|
|
|
|
PUBLIC void
|
|
add_ignore(const char *name, struct ignoretab *tab)
|
|
{
|
|
char field[LINESIZE];
|
|
int h;
|
|
struct ignore *igp;
|
|
|
|
istrcpy(field, name);
|
|
if (member(field, tab))
|
|
return;
|
|
h = hash(field);
|
|
igp = ecalloc(1, sizeof(struct ignore));
|
|
igp->i_field = ecalloc(strlen(field) + 1, sizeof(char));
|
|
(void)strcpy(igp->i_field, field);
|
|
igp->i_link = tab->i_head[h];
|
|
tab->i_head[h] = igp;
|
|
tab->i_count++;
|
|
}
|
|
|
|
/*
|
|
* Write a file to stdout, skipping comment lines.
|
|
*/
|
|
PUBLIC void
|
|
cathelp(const char *fname)
|
|
{
|
|
char *line;
|
|
FILE *f;
|
|
size_t len;
|
|
|
|
if ((f = Fopen(fname, "r")) == NULL) {
|
|
warn("%s", fname);
|
|
return;
|
|
}
|
|
while ((line = fgetln(f, &len)) != NULL) {
|
|
if (*line == '#')
|
|
continue;
|
|
if (fwrite(line, 1, len, stdout) != len)
|
|
break;
|
|
}
|
|
(void)Fclose(f);
|
|
return;
|
|
}
|