8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
735 lines
16 KiB
C
735 lines
16 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)collect.c 8.2 (Berkeley) 4/19/94";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Mail -- a mail program
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*
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* Collect input from standard input, handling
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* ~ escapes.
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*/
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#include "rcv.h"
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#include <fcntl.h>
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#include "extern.h"
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/*
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* Read a message from standard input and return a read file to it
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* or NULL on error.
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*/
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/*
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* The following hokiness with global variables is so that on
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* receipt of an interrupt signal, the partial message can be salted
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* away on dead.letter.
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*/
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static sig_t saveint; /* Previous SIGINT value */
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static sig_t savehup; /* Previous SIGHUP value */
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static sig_t savetstp; /* Previous SIGTSTP value */
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static sig_t savettou; /* Previous SIGTTOU value */
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static sig_t savettin; /* Previous SIGTTIN value */
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static FILE *collf; /* File for saving away */
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static int hadintr; /* Have seen one SIGINT so far */
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static jmp_buf colljmp; /* To get back to work */
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static int colljmp_p; /* whether to long jump */
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static jmp_buf collabort; /* To end collection with error */
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FILE *
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collect(struct header *hp, int printheaders)
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{
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FILE *fbuf;
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int lc, cc, escape, eofcount, fd, c, t;
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char linebuf[LINESIZE], tempname[PATHSIZE], *cp, getsub;
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sigset_t nset;
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int longline, lastlong, rc; /* So we don't make 2 or more lines
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out of a long input line. */
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collf = NULL;
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/*
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* Start catching signals from here, but we're still die on interrupts
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* until we're in the main loop.
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*/
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(void)sigemptyset(&nset);
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(void)sigaddset(&nset, SIGINT);
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(void)sigaddset(&nset, SIGHUP);
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(void)sigprocmask(SIG_BLOCK, &nset, NULL);
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if ((saveint = signal(SIGINT, SIG_IGN)) != SIG_IGN)
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(void)signal(SIGINT, collint);
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if ((savehup = signal(SIGHUP, SIG_IGN)) != SIG_IGN)
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(void)signal(SIGHUP, collhup);
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savetstp = signal(SIGTSTP, collstop);
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savettou = signal(SIGTTOU, collstop);
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savettin = signal(SIGTTIN, collstop);
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if (setjmp(collabort) || setjmp(colljmp)) {
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(void)rm(tempname);
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goto err;
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}
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(void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
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noreset++;
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(void)snprintf(tempname, sizeof(tempname),
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"%s/mail.RsXXXXXXXXXX", tmpdir);
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if ((fd = mkstemp(tempname)) == -1 ||
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(collf = Fdopen(fd, "w+")) == NULL) {
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warn("%s", tempname);
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goto err;
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}
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(void)rm(tempname);
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/*
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* If we are going to prompt for a subject,
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* refrain from printing a newline after
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* the headers (since some people mind).
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*/
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t = GTO|GSUBJECT|GCC|GNL;
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getsub = 0;
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if (hp->h_subject == NULL && value("interactive") != NULL &&
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(value("ask") != NULL || value("asksub") != NULL))
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t &= ~GNL, getsub++;
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if (printheaders) {
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puthead(hp, stdout, t);
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(void)fflush(stdout);
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}
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if ((cp = value("escape")) != NULL)
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escape = *cp;
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else
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escape = ESCAPE;
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eofcount = 0;
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hadintr = 0;
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lastlong = 0;
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longline = 0;
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if (!setjmp(colljmp)) {
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if (getsub)
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grabh(hp, GSUBJECT);
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} else {
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/*
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* Come here for printing the after-signal message.
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* Duplicate messages won't be printed because
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* the write is aborted if we get a SIGTTOU.
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*/
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cont:
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if (hadintr) {
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(void)fflush(stdout);
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fprintf(stderr,
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"\n(Interrupt -- one more to kill letter)\n");
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} else {
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printf("(continue)\n");
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(void)fflush(stdout);
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}
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}
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for (;;) {
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colljmp_p = 1;
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c = readline(stdin, linebuf, LINESIZE);
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colljmp_p = 0;
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if (c < 0) {
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if (value("interactive") != NULL &&
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value("ignoreeof") != NULL && ++eofcount < 25) {
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printf("Use \".\" to terminate letter\n");
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continue;
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}
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break;
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}
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lastlong = longline;
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longline = c == LINESIZE - 1;
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eofcount = 0;
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hadintr = 0;
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if (linebuf[0] == '.' && linebuf[1] == '\0' &&
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value("interactive") != NULL && !lastlong &&
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(value("dot") != NULL || value("ignoreeof") != NULL))
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break;
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if (linebuf[0] != escape || value("interactive") == NULL ||
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lastlong) {
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if (putline(collf, linebuf, !longline) < 0)
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goto err;
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continue;
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}
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c = linebuf[1];
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switch (c) {
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default:
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/*
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* On double escape, just send the single one.
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* Otherwise, it's an error.
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*/
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if (c == escape) {
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if (putline(collf, &linebuf[1], !longline) < 0)
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goto err;
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else
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break;
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}
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printf("Unknown tilde escape.\n");
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break;
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case 'C':
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/*
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* Dump core.
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*/
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core();
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break;
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case '!':
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/*
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* Shell escape, send the balance of the
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* line to sh -c.
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*/
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shell(&linebuf[2]);
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break;
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case ':':
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case '_':
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/*
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* Escape to command mode, but be nice!
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*/
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execute(&linebuf[2], 1);
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goto cont;
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case '.':
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/*
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* Simulate end of file on input.
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*/
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goto out;
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case 'q':
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/*
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* Force a quit of sending mail.
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* Act like an interrupt happened.
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*/
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hadintr++;
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collint(SIGINT);
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exit(1);
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case 'x':
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/*
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* Exit, do not save in dead.letter.
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*/
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goto err;
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case 'h':
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/*
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* Grab a bunch of headers.
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*/
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grabh(hp, GTO|GSUBJECT|GCC|GBCC);
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goto cont;
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case 't':
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/*
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* Add to the To list.
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*/
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hp->h_to = cat(hp->h_to, extract(&linebuf[2], GTO));
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break;
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case 's':
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/*
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* Set the Subject line.
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*/
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cp = &linebuf[2];
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while (isspace((unsigned char)*cp))
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cp++;
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hp->h_subject = savestr(cp);
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break;
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case 'R':
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/*
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* Set the Reply-To line.
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*/
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cp = &linebuf[2];
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while (isspace((unsigned char)*cp))
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cp++;
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hp->h_replyto = savestr(cp);
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break;
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case 'c':
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/*
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* Add to the CC list.
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*/
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hp->h_cc = cat(hp->h_cc, extract(&linebuf[2], GCC));
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break;
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case 'b':
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/*
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* Add to the BCC list.
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*/
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hp->h_bcc = cat(hp->h_bcc, extract(&linebuf[2], GBCC));
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break;
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case 'i':
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case 'A':
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case 'a':
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/*
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* Insert named variable in message.
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*/
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switch(c) {
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case 'i':
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cp = &linebuf[2];
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while(isspace((unsigned char)*cp))
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cp++;
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break;
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case 'a':
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cp = "sign";
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break;
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case 'A':
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cp = "Sign";
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break;
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default:
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goto err;
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}
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if(*cp != '\0' && (cp = value(cp)) != NULL) {
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printf("%s\n", cp);
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if(putline(collf, cp, 1) < 0)
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goto err;
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}
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break;
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case 'd':
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/*
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* Read in the dead letter file.
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*/
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if (strlcpy(linebuf + 2, getdeadletter(),
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sizeof(linebuf) - 2)
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>= sizeof(linebuf) - 2) {
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printf("Line buffer overflow\n");
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break;
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}
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/* FALLTHROUGH */
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case 'r':
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case '<':
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/*
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* Invoke a file:
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* Search for the file name,
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* then open it and copy the contents to collf.
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*/
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cp = &linebuf[2];
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while (isspace((unsigned char)*cp))
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cp++;
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if (*cp == '\0') {
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printf("Interpolate what file?\n");
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break;
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}
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cp = expand(cp);
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if (cp == NULL)
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break;
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if (*cp == '!') {
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/*
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* Insert stdout of command.
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*/
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char *sh;
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int nullfd, tempfd, rc;
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char tempname2[PATHSIZE];
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if ((nullfd = open(_PATH_DEVNULL, O_RDONLY, 0))
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== -1) {
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warn(_PATH_DEVNULL);
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break;
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}
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(void)snprintf(tempname2, sizeof(tempname2),
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"%s/mail.ReXXXXXXXXXX", tmpdir);
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if ((tempfd = mkstemp(tempname2)) == -1 ||
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(fbuf = Fdopen(tempfd, "w+")) == NULL) {
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warn("%s", tempname2);
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break;
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}
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(void)unlink(tempname2);
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if ((sh = value("SHELL")) == NULL)
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sh = _PATH_CSHELL;
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rc = run_command(sh, 0, nullfd, fileno(fbuf),
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"-c", cp+1, NULL);
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close(nullfd);
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if (rc < 0) {
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(void)Fclose(fbuf);
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break;
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}
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if (fsize(fbuf) == 0) {
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fprintf(stderr,
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"No bytes from command \"%s\"\n",
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cp+1);
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(void)Fclose(fbuf);
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break;
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}
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rewind(fbuf);
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} else if (isdir(cp)) {
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printf("%s: Directory\n", cp);
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break;
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} else if ((fbuf = Fopen(cp, "r")) == NULL) {
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warn("%s", cp);
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break;
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}
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printf("\"%s\" ", cp);
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(void)fflush(stdout);
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lc = 0;
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cc = 0;
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while ((rc = readline(fbuf, linebuf, LINESIZE)) >= 0) {
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if (rc != LINESIZE - 1)
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lc++;
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if ((t = putline(collf, linebuf,
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rc != LINESIZE - 1)) < 0) {
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(void)Fclose(fbuf);
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goto err;
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}
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cc += t;
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}
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(void)Fclose(fbuf);
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printf("%d/%d\n", lc, cc);
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break;
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case 'w':
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/*
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* Write the message on a file.
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*/
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cp = &linebuf[2];
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while (*cp == ' ' || *cp == '\t')
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cp++;
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if (*cp == '\0') {
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fprintf(stderr, "Write what file!?\n");
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break;
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}
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if ((cp = expand(cp)) == NULL)
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break;
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rewind(collf);
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exwrite(cp, collf, 1);
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break;
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case 'm':
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case 'M':
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case 'f':
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case 'F':
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/*
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* Interpolate the named messages, if we
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* are in receiving mail mode. Does the
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* standard list processing garbage.
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* If ~f is given, we don't shift over.
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*/
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if (forward(linebuf + 2, collf, tempname, c) < 0)
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goto err;
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goto cont;
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case '?':
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if ((fbuf = Fopen(_PATH_TILDE, "r")) == NULL) {
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warn("%s", _PATH_TILDE);
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break;
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}
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while ((t = getc(fbuf)) != EOF)
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(void)putchar(t);
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(void)Fclose(fbuf);
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break;
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case 'p':
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/*
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* Print out the current state of the
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* message without altering anything.
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*/
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rewind(collf);
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printf("-------\nMessage contains:\n");
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puthead(hp, stdout, GTO|GSUBJECT|GCC|GBCC|GNL);
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while ((t = getc(collf)) != EOF)
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(void)putchar(t);
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goto cont;
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case '|':
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/*
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* Pipe message through command.
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* Collect output as new message.
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*/
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rewind(collf);
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mespipe(collf, &linebuf[2]);
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goto cont;
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case 'v':
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case 'e':
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/*
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* Edit the current message.
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* 'e' means to use EDITOR
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* 'v' means to use VISUAL
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*/
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rewind(collf);
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mesedit(collf, c);
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goto cont;
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}
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}
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goto out;
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err:
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if (collf != NULL) {
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(void)Fclose(collf);
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collf = NULL;
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}
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out:
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if (collf != NULL)
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rewind(collf);
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noreset--;
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(void)sigprocmask(SIG_BLOCK, &nset, NULL);
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(void)signal(SIGINT, saveint);
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(void)signal(SIGHUP, savehup);
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(void)signal(SIGTSTP, savetstp);
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(void)signal(SIGTTOU, savettou);
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(void)signal(SIGTTIN, savettin);
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(void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
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return (collf);
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}
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/*
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* Write a file, ex-like if f set.
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*/
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int
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exwrite(char name[], FILE *fp, int f)
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{
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FILE *of;
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int c, lc;
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long cc;
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struct stat junk;
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if (f) {
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printf("\"%s\" ", name);
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(void)fflush(stdout);
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}
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if (stat(name, &junk) >= 0 && S_ISREG(junk.st_mode)) {
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if (!f)
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fprintf(stderr, "%s: ", name);
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fprintf(stderr, "File exists\n");
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return (-1);
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}
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if ((of = Fopen(name, "w")) == NULL) {
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warn((char *)NULL);
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return (-1);
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}
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lc = 0;
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cc = 0;
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while ((c = getc(fp)) != EOF) {
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cc++;
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if (c == '\n')
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lc++;
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(void)putc(c, of);
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if (ferror(of)) {
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warnx("%s", name);
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(void)Fclose(of);
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return (-1);
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}
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}
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(void)Fclose(of);
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printf("%d/%ld\n", lc, cc);
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(void)fflush(stdout);
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return (0);
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}
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/*
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* Edit the message being collected on fp.
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* On return, make the edit file the new temp file.
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*/
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void
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mesedit(FILE *fp, int c)
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{
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sig_t sigint = signal(SIGINT, SIG_IGN);
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FILE *nf = run_editor(fp, (off_t)-1, c, 0);
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|
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if (nf != NULL) {
|
|
(void)fseeko(nf, (off_t)0, SEEK_END);
|
|
collf = nf;
|
|
(void)Fclose(fp);
|
|
}
|
|
(void)signal(SIGINT, sigint);
|
|
}
|
|
|
|
/*
|
|
* Pipe the message through the command.
|
|
* Old message is on stdin of command;
|
|
* New message collected from stdout.
|
|
* Sh -c must return 0 to accept the new message.
|
|
*/
|
|
void
|
|
mespipe(FILE *fp, char cmd[])
|
|
{
|
|
FILE *nf;
|
|
int fd;
|
|
sig_t sigint = signal(SIGINT, SIG_IGN);
|
|
char *sh, tempname[PATHSIZE];
|
|
|
|
(void)snprintf(tempname, sizeof(tempname),
|
|
"%s/mail.ReXXXXXXXXXX", tmpdir);
|
|
if ((fd = mkstemp(tempname)) == -1 ||
|
|
(nf = Fdopen(fd, "w+")) == NULL) {
|
|
warn("%s", tempname);
|
|
goto out;
|
|
}
|
|
(void)rm(tempname);
|
|
/*
|
|
* stdin = current message.
|
|
* stdout = new message.
|
|
*/
|
|
if ((sh = value("SHELL")) == NULL)
|
|
sh = _PATH_CSHELL;
|
|
if (run_command(sh,
|
|
0, fileno(fp), fileno(nf), "-c", cmd, NULL) < 0) {
|
|
(void)Fclose(nf);
|
|
goto out;
|
|
}
|
|
if (fsize(nf) == 0) {
|
|
fprintf(stderr, "No bytes from \"%s\" !?\n", cmd);
|
|
(void)Fclose(nf);
|
|
goto out;
|
|
}
|
|
/*
|
|
* Take new files.
|
|
*/
|
|
(void)fseeko(nf, (off_t)0, SEEK_END);
|
|
collf = nf;
|
|
(void)Fclose(fp);
|
|
out:
|
|
(void)signal(SIGINT, sigint);
|
|
}
|
|
|
|
/*
|
|
* Interpolate the named messages into the current
|
|
* message, preceding each line with a tab.
|
|
* Return a count of the number of characters now in
|
|
* the message, or -1 if an error is encountered writing
|
|
* the message temporary. The flag argument is 'm' if we
|
|
* should shift over and 'f' if not.
|
|
*/
|
|
int
|
|
forward(char ms[], FILE *fp, char *fn, int f)
|
|
{
|
|
int *msgvec;
|
|
struct ignoretab *ig;
|
|
char *tabst;
|
|
|
|
msgvec = (int *)salloc((msgCount+1) * sizeof(*msgvec));
|
|
if (msgvec == NULL)
|
|
return (0);
|
|
if (getmsglist(ms, msgvec, 0) < 0)
|
|
return (0);
|
|
if (*msgvec == 0) {
|
|
*msgvec = first(0, MMNORM);
|
|
if (*msgvec == 0) {
|
|
printf("No appropriate messages\n");
|
|
return (0);
|
|
}
|
|
msgvec[1] = 0;
|
|
}
|
|
if (f == 'f' || f == 'F')
|
|
tabst = NULL;
|
|
else if ((tabst = value("indentprefix")) == NULL)
|
|
tabst = "\t";
|
|
ig = isupper((unsigned char)f) ? NULL : ignore;
|
|
printf("Interpolating:");
|
|
for (; *msgvec != 0; msgvec++) {
|
|
struct message *mp = message + *msgvec - 1;
|
|
|
|
touch(mp);
|
|
printf(" %d", *msgvec);
|
|
if (sendmessage(mp, fp, ig, tabst) < 0) {
|
|
warnx("%s", fn);
|
|
return (-1);
|
|
}
|
|
}
|
|
printf("\n");
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Print (continue) when continued after ^Z.
|
|
*/
|
|
/*ARGSUSED*/
|
|
void
|
|
collstop(int s)
|
|
{
|
|
sig_t old_action = signal(s, SIG_DFL);
|
|
sigset_t nset;
|
|
|
|
(void)sigemptyset(&nset);
|
|
(void)sigaddset(&nset, s);
|
|
(void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
|
|
(void)kill(0, s);
|
|
(void)sigprocmask(SIG_BLOCK, &nset, NULL);
|
|
(void)signal(s, old_action);
|
|
if (colljmp_p) {
|
|
colljmp_p = 0;
|
|
hadintr = 0;
|
|
longjmp(colljmp, 1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* On interrupt, come here to save the partial message in ~/dead.letter.
|
|
* Then jump out of the collection loop.
|
|
*/
|
|
/*ARGSUSED*/
|
|
void
|
|
collint(int s __unused)
|
|
{
|
|
/*
|
|
* the control flow is subtle, because we can be called from ~q.
|
|
*/
|
|
if (!hadintr) {
|
|
if (value("ignore") != NULL) {
|
|
printf("@");
|
|
(void)fflush(stdout);
|
|
clearerr(stdin);
|
|
return;
|
|
}
|
|
hadintr = 1;
|
|
longjmp(colljmp, 1);
|
|
}
|
|
rewind(collf);
|
|
if (value("nosave") == NULL)
|
|
savedeadletter(collf);
|
|
longjmp(collabort, 1);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
void
|
|
collhup(int s __unused)
|
|
{
|
|
rewind(collf);
|
|
savedeadletter(collf);
|
|
/*
|
|
* Let's pretend nobody else wants to clean up,
|
|
* a true statement at this time.
|
|
*/
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
savedeadletter(FILE *fp)
|
|
{
|
|
FILE *dbuf;
|
|
int c;
|
|
char *cp;
|
|
|
|
if (fsize(fp) == 0)
|
|
return;
|
|
cp = getdeadletter();
|
|
c = umask(077);
|
|
dbuf = Fopen(cp, "a");
|
|
(void)umask(c);
|
|
if (dbuf == NULL)
|
|
return;
|
|
while ((c = getc(fp)) != EOF)
|
|
(void)putc(c, dbuf);
|
|
(void)Fclose(dbuf);
|
|
rewind(fp);
|
|
}
|