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636 lines
14 KiB
C
636 lines
14 KiB
C
/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)collect.c 8.2 (Berkeley) 4/19/94";
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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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* 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 "extern.h"
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/*
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* Read a message from standard output 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(hp, printheaders)
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struct header *hp;
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int printheaders;
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{
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FILE *fbuf;
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int lc, cc, escape, eofcount;
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register int c, t;
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char linebuf[LINESIZE], *cp;
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extern char tempMail[];
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char getsub;
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int omask;
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void collint(), collhup(), collstop();
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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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omask = sigblock(sigmask(SIGINT) | sigmask(SIGHUP));
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if ((saveint = signal(SIGINT, SIG_IGN)) != SIG_IGN)
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signal(SIGINT, collint);
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if ((savehup = signal(SIGHUP, SIG_IGN)) != SIG_IGN)
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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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rm(tempMail);
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goto err;
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}
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sigsetmask(omask & ~(sigmask(SIGINT) | sigmask(SIGHUP)));
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noreset++;
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if ((collf = Fopen(tempMail, "w+")) == NULL) {
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perror(tempMail);
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goto err;
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}
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unlink(tempMail);
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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 == NOSTR && value("interactive") != NOSTR &&
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(value("ask") != NOSTR || value("asksub") != NOSTR))
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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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fflush(stdout);
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}
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if ((cp = value("escape")) != NOSTR)
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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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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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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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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") != NOSTR &&
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value("ignoreeof") != NOSTR && ++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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eofcount = 0;
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hadintr = 0;
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if (linebuf[0] == '.' && linebuf[1] == '\0' &&
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value("interactive") != NOSTR &&
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(value("dot") != NOSTR || value("ignoreeof") != NOSTR))
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break;
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if (linebuf[0] != escape || value("interactive") == NOSTR) {
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if (putline(collf, linebuf) < 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]) < 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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/*
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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 '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 list.
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*/
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cp = &linebuf[2];
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while (isspace(*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 '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 stuff to blind carbon copies 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 'd':
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strcpy(linebuf + 2, getdeadletter());
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/* fall into . . . */
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case 'r':
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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(*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 == NOSTR)
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break;
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if (isdir(cp)) {
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printf("%s: Directory\n", cp);
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break;
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}
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if ((fbuf = Fopen(cp, "r")) == NULL) {
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perror(cp);
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break;
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}
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printf("\"%s\" ", cp);
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fflush(stdout);
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lc = 0;
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cc = 0;
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while (readline(fbuf, linebuf, LINESIZE) >= 0) {
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lc++;
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if ((t = putline(collf, linebuf)) < 0) {
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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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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)) == NOSTR)
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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, 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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perror(_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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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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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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sigblock(sigmask(SIGINT) | sigmask(SIGHUP));
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signal(SIGINT, saveint);
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signal(SIGHUP, savehup);
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signal(SIGTSTP, savetstp);
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signal(SIGTTOU, savettou);
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signal(SIGTTIN, savettin);
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sigsetmask(omask);
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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(name, fp, f)
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char name[];
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FILE *fp;
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int f;
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{
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register FILE *of;
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register int c;
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long cc;
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int lc;
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struct stat junk;
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if (f) {
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printf("\"%s\" ", name);
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fflush(stdout);
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}
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if (stat(name, &junk) >= 0 && (junk.st_mode & S_IFMT) == S_IFREG) {
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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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perror(NOSTR);
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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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perror(name);
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Fclose(of);
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return(-1);
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}
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}
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Fclose(of);
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printf("%d/%ld\n", lc, cc);
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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(fp, c)
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FILE *fp;
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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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if (nf != NULL) {
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fseek(nf, 0L, 2);
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collf = nf;
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Fclose(fp);
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}
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(void) signal(SIGINT, sigint);
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}
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/*
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* Pipe the message through the command.
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* Old message is on stdin of command;
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* New message collected from stdout.
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* Sh -c must return 0 to accept the new message.
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*/
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void
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mespipe(fp, cmd)
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FILE *fp;
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char cmd[];
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{
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FILE *nf;
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sig_t sigint = signal(SIGINT, SIG_IGN);
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extern char tempEdit[];
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char *shell;
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if ((nf = Fopen(tempEdit, "w+")) == NULL) {
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perror(tempEdit);
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goto out;
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}
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(void) unlink(tempEdit);
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/*
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* stdin = current message.
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* stdout = new message.
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*/
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if ((shell = value("SHELL")) == NOSTR)
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shell = _PATH_CSHELL;
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if (run_command(shell,
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0, fileno(fp), fileno(nf), "-c", cmd, NOSTR) < 0) {
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(void) Fclose(nf);
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goto out;
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}
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if (fsize(nf) == 0) {
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fprintf(stderr, "No bytes from \"%s\" !?\n", cmd);
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(void) Fclose(nf);
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goto out;
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}
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/*
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* Take new files.
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*/
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(void) fseek(nf, 0L, 2);
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collf = nf;
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(void) Fclose(fp);
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out:
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(void) signal(SIGINT, sigint);
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}
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/*
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* Interpolate the named messages into the current
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* message, preceding each line with a tab.
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* Return a count of the number of characters now in
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* the message, or -1 if an error is encountered writing
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* the message temporary. The flag argument is 'm' if we
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* should shift over and 'f' if not.
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*/
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int
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forward(ms, fp, f)
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char ms[];
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FILE *fp;
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int f;
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{
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register int *msgvec;
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extern char tempMail[];
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struct ignoretab *ig;
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char *tabst;
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msgvec = (int *) salloc((msgCount+1) * sizeof *msgvec);
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if (msgvec == (int *) NOSTR)
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return(0);
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if (getmsglist(ms, msgvec, 0) < 0)
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return(0);
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if (*msgvec == 0) {
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*msgvec = first(0, MMNORM);
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if (*msgvec == NULL) {
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printf("No appropriate messages\n");
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return(0);
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}
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msgvec[1] = NULL;
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}
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if (f == 'f' || f == 'F')
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tabst = NOSTR;
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else if ((tabst = value("indentprefix")) == NOSTR)
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tabst = "\t";
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ig = isupper(f) ? NULL : ignore;
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printf("Interpolating:");
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for (; *msgvec != 0; msgvec++) {
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struct message *mp = message + *msgvec - 1;
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touch(mp);
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printf(" %d", *msgvec);
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if (send(mp, fp, ig, tabst) < 0) {
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perror(tempMail);
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return(-1);
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}
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}
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printf("\n");
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return(0);
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}
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/*
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* Print (continue) when continued after ^Z.
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*/
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/*ARGSUSED*/
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void
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collstop(s)
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int s;
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{
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sig_t old_action = signal(s, SIG_DFL);
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|
|
sigsetmask(sigblock(0) & ~sigmask(s));
|
|
kill(0, s);
|
|
sigblock(sigmask(s));
|
|
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(s)
|
|
int s;
|
|
{
|
|
/*
|
|
* the control flow is subtle, because we can be called from ~q.
|
|
*/
|
|
if (!hadintr) {
|
|
if (value("ignore") != NOSTR) {
|
|
puts("@");
|
|
fflush(stdout);
|
|
clearerr(stdin);
|
|
return;
|
|
}
|
|
hadintr = 1;
|
|
longjmp(colljmp, 1);
|
|
}
|
|
rewind(collf);
|
|
if (value("nosave") == NOSTR)
|
|
savedeadletter(collf);
|
|
longjmp(collabort, 1);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
void
|
|
collhup(s)
|
|
int s;
|
|
{
|
|
rewind(collf);
|
|
savedeadletter(collf);
|
|
/*
|
|
* Let's pretend nobody else wants to clean up,
|
|
* a true statement at this time.
|
|
*/
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
savedeadletter(fp)
|
|
register FILE *fp;
|
|
{
|
|
register FILE *dbuf;
|
|
register 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);
|
|
Fclose(dbuf);
|
|
rewind(fp);
|
|
}
|