725 lines
15 KiB
C
725 lines
15 KiB
C
/* $NetBSD: names.c,v 1.33 2017/11/09 20:27:50 christos 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[] = "@(#)names.c 8.1 (Berkeley) 6/6/93";
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#else
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__RCSID("$NetBSD: names.c,v 1.33 2017/11/09 20:27:50 christos Exp $");
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#endif
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#endif /* not lint */
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/*
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* Mail -- a mail program
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*
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* Handle name lists.
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*/
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#include "rcv.h"
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#include "extern.h"
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/*
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* Allocate a single element of a name list,
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* initialize its name field to the passed
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* name and return it.
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*/
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PUBLIC struct name *
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nalloc(char str[], int ntype)
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{
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struct name *np;
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np = salloc(sizeof(*np));
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np->n_flink = NULL;
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np->n_blink = NULL;
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np->n_type = ntype;
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np->n_name = savestr(str);
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return np;
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}
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/*
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* Find the tail of a list and return it.
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*/
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static struct name *
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tailof(struct name *name)
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{
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struct name *np;
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np = name;
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if (np == NULL)
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return NULL;
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while (np->n_flink != NULL)
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np = np->n_flink;
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return np;
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}
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/*
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* Grab a single word (liberal word)
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* Throw away things between ()'s, and take anything between <>.
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*/
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static char *
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yankword(char *ap, char wbuf[])
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{
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char *cp, *cp2;
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cp = ap;
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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 (is_WSP(*cp) || *cp == ',')
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cp++;
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else
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break;
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}
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if (*cp == '<')
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for (cp2 = wbuf; *cp && (*cp2++ = *cp++) != '>'; /*EMPTY*/)
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continue;
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else
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for (cp2 = wbuf; *cp && !strchr(" \t,(", *cp); *cp2++ = *cp++)
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continue;
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*cp2 = '\0';
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return cp;
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}
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/*
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* Extract a list of names from a line,
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* and make a list of names from it.
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* Return the list or NULL if none found.
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*/
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PUBLIC struct name *
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extract(char line[], int ntype)
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{
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char *cp;
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struct name *begin, *np, *t;
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char nbuf[LINESIZE];
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if (line == NULL || *line == '\0')
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return NULL;
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begin = NULL;
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np = NULL;
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cp = line;
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while ((cp = yankword(cp, nbuf)) != NULL) {
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t = nalloc(nbuf, ntype);
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if (begin == NULL)
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begin = t;
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else
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np->n_flink = t;
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t->n_blink = np;
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np = t;
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}
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return begin;
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}
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/* XXX - is this really sufficient? */
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static int need_quotes(char *str)
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{
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return strpbrk(str, " \t") != NULL;
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}
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/*
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* Turn a list of names into a string of the same names.
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*/
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PUBLIC char *
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detract(struct name *np, int ntype)
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{
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size_t s;
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char *cp, *begin;
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struct name *p;
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int comma;
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int quote;
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quote = ntype & GSMOPTS;
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comma = ntype & GCOMMA;
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if (np == NULL)
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return NULL;
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ntype &= ~GCOMMA;
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s = 0;
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if (debug && comma)
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(void)fprintf(stderr, "detract asked to insert commas\n");
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for (p = np; p != NULL; p = p->n_flink) {
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if (ntype && (p->n_type & GMASK) != ntype)
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continue;
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s += strlen(p->n_name) + 1;
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if (comma)
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s++;
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if (quote && need_quotes(p->n_name))
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s += 2;
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}
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if (s == 0)
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return NULL;
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s += 2;
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begin = salloc(s);
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cp = begin;
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for (p = np; p != NULL; p = p->n_flink) {
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int do_quotes;
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if (ntype && (p->n_type & GMASK) != ntype)
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continue;
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do_quotes = (quote && need_quotes(p->n_name));
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if (do_quotes)
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*cp++ = '"';
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cp = copy(p->n_name, cp);
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if (comma && p->n_flink != NULL)
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*cp++ = ',';
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if (do_quotes)
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*cp++ = '"';
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*cp++ = ' ';
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}
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*--cp = 0;
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if (comma && *--cp == ',')
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*cp = 0;
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return begin;
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}
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/*
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* Determine if the passed address is a local "send to file" address.
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* If any of the network metacharacters precedes any slashes, it can't
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* be a filename. We cheat with .'s to allow path names like ./...
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*/
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static int
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isfileaddr(char *name)
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{
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char *cp;
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if (*name == '+')
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return 1;
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for (cp = name; *cp; cp++) {
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if (*cp == '!' || *cp == '%' || *cp == '@')
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return 0;
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if (*cp == '/')
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return 1;
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}
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return 0;
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}
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/*
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* For each recipient in the passed name list with a /
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* in the name, append the message to the end of the named file
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* and remove him from the recipient list.
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*
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* Recipients whose name begins with | are piped through the given
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* program and removed.
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*/
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PUBLIC struct name *
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outof(struct name *names, FILE *fo, struct header *hp)
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{
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int c, fd;
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struct name *np, *begin;
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time_t now;
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char *date;
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const char *fname;
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FILE *fout, *fin;
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int ispipe;
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char tempname[PATHSIZE];
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if (value("expandaddr") == NULL)
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return names;
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begin = names;
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np = names;
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(void)time(&now);
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date = ctime(&now);
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while (np != NULL) {
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if (!isfileaddr(np->n_name) && np->n_name[0] != '|') {
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np = np->n_flink;
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continue;
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}
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ispipe = np->n_name[0] == '|';
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if (ispipe)
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fname = np->n_name+1;
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else {
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fname = expand(np->n_name);
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if (fname == NULL) {
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warnx("Filename expansion of %s failed",
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np->n_name);
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senderr++;
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goto cant;
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}
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}
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/*
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* See if we have copied the complete message out yet.
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* If not, do so.
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*/
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if (image < 0) {
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(void)snprintf(tempname, sizeof(tempname),
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"%s/mail.ReXXXXXXXXXXXX", tmpdir);
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if ((fd = mkstemp(tempname)) == -1 ||
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(fout = Fdopen(fd, "aef")) == NULL) {
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if (fd != -1)
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(void)close(fd);
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warn("%s", tempname);
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senderr++;
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goto cant;
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}
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image = open(tempname, O_RDWR | O_CLOEXEC);
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(void)unlink(tempname);
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if (image < 0) {
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warn("%s", tempname);
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senderr++;
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(void)Fclose(fout);
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goto cant;
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}
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(void)fprintf(fout, "From %s %s", myname, date);
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#ifdef MIME_SUPPORT
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(void)puthead(hp, fout, GTO|GSUBJECT|GCC|GMISC|GMIME|GNL);
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#else
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(void)puthead(hp, fout, GTO|GSUBJECT|GCC|GMISC|GNL);
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#endif
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while ((c = getc(fo)) != EOF)
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(void)putc(c, fout);
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rewind(fo);
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(void)putc('\n', fout);
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(void)fflush(fout);
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if (ferror(fout)) {
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warn("%s", tempname);
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senderr++;
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(void)Fclose(fout);
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goto cant;
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}
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(void)Fclose(fout);
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}
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/*
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* Now either copy "image" to the desired file
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* or give it as the standard input to the desired
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* program as appropriate.
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*/
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if (ispipe) {
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int pid;
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const char *shellcmd;
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sigset_t nset;
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/*
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* XXX
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* We can't really reuse the same image file,
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* because multiple piped recipients will
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* share the same lseek location and trample
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* on one another.
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*/
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if ((shellcmd = value(ENAME_SHELL)) == NULL)
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shellcmd = _PATH_CSHELL;
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(void)sigemptyset(&nset);
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(void)sigaddset(&nset, SIGHUP);
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(void)sigaddset(&nset, SIGINT);
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(void)sigaddset(&nset, SIGQUIT);
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pid = start_command(shellcmd, &nset,
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image, -1, "-c", fname, NULL);
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if (pid < 0) {
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senderr++;
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goto cant;
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}
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free_child(pid);
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} else {
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int f;
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if ((fout = Fopen(fname, "aef")) == NULL) {
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warn("%s", fname);
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senderr++;
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goto cant;
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}
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if ((f = dup(image)) < 0) {
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warn("dup");
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fin = NULL;
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} else
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fin = Fdopen(f, "ref");
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if (fin == NULL) {
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(void)fprintf(stderr, "Can't reopen image\n");
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(void)Fclose(fout);
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senderr++;
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goto cant;
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}
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rewind(fin);
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while ((c = getc(fin)) != EOF)
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(void)putc(c, fout);
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if (ferror(fout)) {
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warn("%s", fname);
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senderr++;
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(void)Fclose(fout);
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(void)Fclose(fin);
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goto cant;
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}
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(void)Fclose(fout);
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(void)Fclose(fin);
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}
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cant:
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/*
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* In days of old we removed the entry from the
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* the list; now for sake of header expansion
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* we leave it in and mark it as deleted.
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*/
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np->n_type |= GDEL;
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np = np->n_flink;
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}
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if (image >= 0) {
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(void)close(image);
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image = -1;
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}
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return begin;
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}
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/*
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* Put another node onto a list of names and return
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* the list.
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*/
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static struct name *
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put(struct name *list, struct name *node)
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{
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node->n_flink = list;
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node->n_blink = NULL;
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if (list != NULL)
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list->n_blink = node;
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return node;
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}
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/*
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* Recursively expand a group name. We limit the expansion to some
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* fixed level to keep things from going haywire.
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* Direct recursion is not expanded for convenience.
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*/
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PUBLIC struct name *
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gexpand(struct name *nlist, struct grouphead *gh, int metoo, int ntype)
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{
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struct group *gp;
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struct grouphead *ngh;
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struct name *np;
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static int depth;
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char *cp;
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if (depth > MAXEXP) {
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(void)printf("Expanding alias to depth larger than %d\n", MAXEXP);
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return nlist;
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}
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depth++;
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for (gp = gh->g_list; gp != NULL; gp = gp->ge_link) {
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cp = gp->ge_name;
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if (*cp == '\\')
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goto quote;
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if (strcmp(cp, gh->g_name) == 0)
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goto quote;
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if ((ngh = findgroup(cp)) != NULL) {
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nlist = gexpand(nlist, ngh, metoo, ntype);
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continue;
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}
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quote:
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np = nalloc(cp, ntype);
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/*
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* At this point should allow to expand
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* to self if only person in group
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*/
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if (gp == gh->g_list && gp->ge_link == NULL)
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goto skip;
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if (!metoo && strcmp(cp, myname) == 0)
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np->n_type |= GDEL;
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skip:
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nlist = put(nlist, np);
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}
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depth--;
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return nlist;
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}
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/*
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* Map all of the aliased users in the invoker's mailrc
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* file and insert them into the list.
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* Changed after all these months of service to recursively
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* expand names (2/14/80).
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*/
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PUBLIC struct name *
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usermap(struct name *names)
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{
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struct name *new, *np, *cp;
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struct grouphead *gh;
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int metoo;
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new = NULL;
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np = names;
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metoo = (value(ENAME_METOO) != NULL);
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while (np != NULL) {
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if (np->n_name[0] == '\\') {
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cp = np->n_flink;
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new = put(new, np);
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np = cp;
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continue;
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}
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gh = findgroup(np->n_name);
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cp = np->n_flink;
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if (gh != NULL)
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new = gexpand(new, gh, metoo, np->n_type);
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else
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new = put(new, np);
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np = cp;
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}
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return new;
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}
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/*
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* Concatenate the two passed name lists, return the result.
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*/
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PUBLIC struct name *
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cat(struct name *n1, struct name *n2)
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{
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struct name *tail;
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if (n1 == NULL)
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return n2;
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if (n2 == NULL)
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return n1;
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tail = tailof(n1);
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tail->n_flink = n2;
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n2->n_blink = tail;
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return n1;
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}
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/*
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* Determine the number of undeleted elements in
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* a name list and return it.
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*/
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PUBLIC int
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count(struct name *np)
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{
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int c;
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for (c = 0; np != NULL; np = np->n_flink)
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if ((np->n_type & GDEL) == 0)
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c++;
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return c;
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}
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/*
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* Unpack the name list onto a vector of strings.
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* Return an error if the name list won't fit.
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*/
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PUBLIC const char **
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unpack(struct name *smopts, struct name *np)
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{
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const char **ap, **begin;
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struct name *n;
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int t, extra, metoo, verbose;
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n = np;
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if ((t = count(n)) == 0)
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errx(EXIT_FAILURE, "No names to unpack");
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/*
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* Compute the number of extra arguments we will need.
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* We need at least two extra -- one for "mail" and one for
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* the terminating 0 pointer. Additional spots may be needed
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* to pass along -f to the host mailer.
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*/
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extra = 3 + count(smopts);
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extra++;
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metoo = value(ENAME_METOO) != NULL;
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if (metoo)
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extra++;
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verbose = value(ENAME_VERBOSE) != NULL;
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if (verbose)
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extra++;
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begin = salloc((t + extra) * sizeof(*begin));
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ap = begin;
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*ap++ = "sendmail";
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*ap++ = "-i";
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if (metoo)
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*ap++ = "-m";
|
|
if (verbose)
|
|
*ap++ = "-v";
|
|
for (/*EMPTY*/; smopts != NULL; smopts = smopts->n_flink)
|
|
if ((smopts->n_type & GDEL) == 0)
|
|
*ap++ = smopts->n_name;
|
|
*ap++ = "--";
|
|
for (/*EMPTY*/; n != NULL; n = n->n_flink)
|
|
if ((n->n_type & GDEL) == 0)
|
|
*ap++ = n->n_name;
|
|
*ap = NULL;
|
|
return begin;
|
|
}
|
|
|
|
/*
|
|
* Remove all of the duplicates from the passed name list by
|
|
* insertion sorting them, then checking for dups.
|
|
* Return the head of the new list.
|
|
*/
|
|
PUBLIC struct name *
|
|
elide(struct name *names)
|
|
{
|
|
struct name *np, *t, *new;
|
|
struct name *x;
|
|
|
|
if (names == NULL)
|
|
return NULL;
|
|
new = names;
|
|
np = names;
|
|
np = np->n_flink;
|
|
if (np != NULL)
|
|
np->n_blink = NULL;
|
|
new->n_flink = NULL;
|
|
while (np != NULL) {
|
|
t = new;
|
|
while (strcasecmp(t->n_name, np->n_name) < 0) {
|
|
if (t->n_flink == NULL)
|
|
break;
|
|
t = t->n_flink;
|
|
}
|
|
|
|
/*
|
|
* If we ran out of t's, put the new entry after
|
|
* the current value of t.
|
|
*/
|
|
|
|
if (strcasecmp(t->n_name, np->n_name) < 0) {
|
|
t->n_flink = np;
|
|
np->n_blink = t;
|
|
t = np;
|
|
np = np->n_flink;
|
|
t->n_flink = NULL;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Otherwise, put the new entry in front of the
|
|
* current t. If at the front of the list,
|
|
* the new guy becomes the new head of the list.
|
|
*/
|
|
|
|
if (t == new) {
|
|
t = np;
|
|
np = np->n_flink;
|
|
t->n_flink = new;
|
|
new->n_blink = t;
|
|
t->n_blink = NULL;
|
|
new = t;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* The normal case -- we are inserting into the
|
|
* middle of the list.
|
|
*/
|
|
|
|
x = np;
|
|
np = np->n_flink;
|
|
x->n_flink = t;
|
|
x->n_blink = t->n_blink;
|
|
t->n_blink->n_flink = x;
|
|
t->n_blink = x;
|
|
}
|
|
|
|
/*
|
|
* Now the list headed up by new is sorted.
|
|
* Go through it and remove duplicates.
|
|
*/
|
|
|
|
np = new;
|
|
while (np != NULL) {
|
|
t = np;
|
|
while (t->n_flink != NULL &&
|
|
strcasecmp(np->n_name, t->n_flink->n_name) == 0)
|
|
t = t->n_flink;
|
|
if (t == np || t == NULL) {
|
|
np = np->n_flink;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Now t points to the last entry with the same name
|
|
* as np. Make np point beyond t.
|
|
*/
|
|
|
|
np->n_flink = t->n_flink;
|
|
if (t->n_flink != NULL)
|
|
t->n_flink->n_blink = np;
|
|
np = np->n_flink;
|
|
}
|
|
return new;
|
|
}
|
|
|
|
/*
|
|
* Delete the given name from a namelist.
|
|
*/
|
|
PUBLIC struct name *
|
|
delname(struct name *np, char name[])
|
|
{
|
|
struct name *p;
|
|
|
|
for (p = np; p != NULL; p = p->n_flink)
|
|
if (strcasecmp(p->n_name, name) == 0) {
|
|
if (p->n_blink == NULL) {
|
|
if (p->n_flink != NULL)
|
|
p->n_flink->n_blink = NULL;
|
|
np = p->n_flink;
|
|
continue;
|
|
}
|
|
if (p->n_flink == NULL) {
|
|
if (p->n_blink != NULL)
|
|
p->n_blink->n_flink = NULL;
|
|
continue;
|
|
}
|
|
p->n_blink->n_flink = p->n_flink;
|
|
p->n_flink->n_blink = p->n_blink;
|
|
}
|
|
return np;
|
|
}
|
|
|
|
/*
|
|
* Pretty print a name list
|
|
* Uncomment it if you need it.
|
|
*/
|
|
#if 0
|
|
PUBLIC void
|
|
prettyprint(name)
|
|
struct name *name;
|
|
{
|
|
struct name *np;
|
|
|
|
np = name;
|
|
while (np != NULL) {
|
|
(void)fprintf(stderr, "%s(%d) ", np->n_name, np->n_type);
|
|
np = np->n_flink;
|
|
}
|
|
(void)fprintf(stderr, "\n");
|
|
}
|
|
#endif
|