775 lines
17 KiB
C
775 lines
17 KiB
C
/* $NetBSD: collect.c,v 1.42 2007/10/29 23:20:38 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[] = "@(#)collect.c 8.2 (Berkeley) 4/19/94";
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#else
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__RCSID("$NetBSD: collect.c,v 1.42 2007/10/29 23:20:38 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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* Collect input from standard input, handling
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* ~ escapes.
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*/
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#include <assert.h>
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#include <util.h>
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#include "rcv.h"
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#include "extern.h"
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#include "format.h"
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#ifdef MIME_SUPPORT
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#include "mime.h"
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#endif
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#include "thread.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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/*
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* Write a file, ex-like if f set.
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*/
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static int
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exwrite(const char name[], FILE *fp, int f)
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{
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FILE *of;
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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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(void)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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(void)fprintf(stderr, "%s: ", name);
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(void)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("%s", name);
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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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warn("%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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(void)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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static 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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if (nf != NULL) {
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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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}
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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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static void
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mespipe(FILE *fp, 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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const char *shellcmd;
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int fd;
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char tempname[PATHSIZE];
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(void)snprintf(tempname, sizeof(tempname),
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"%s/mail.ReXXXXXXXXXX", tmpdir);
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if ((fd = mkstemp(tempname)) == -1 ||
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(nf = Fdopen(fd, "w+")) == 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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goto out;
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}
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(void)unlink(tempname);
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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 ((shellcmd = value(ENAME_SHELL)) == NULL)
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shellcmd = _PATH_CSHELL;
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if (run_command(shellcmd,
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0, fileno(fp), fileno(nf), "-c", cmd, NULL) < 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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(void)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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static int
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interpolate(char ms[], FILE *fp, char *fn, int f)
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{
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int *msgvec;
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struct ignoretab *ig;
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const char *tabst;
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#ifdef MIME_SUPPORT
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struct mime_info *mip;
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int retval;
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#endif
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msgvec = salloc((get_msgCount() + 1) * sizeof(*msgvec));
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if (msgvec == NULL)
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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 == 0) {
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(void)printf("No appropriate messages\n");
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return 0;
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}
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msgvec[1] = 0;
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}
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if (f == 'f' || f == 'F')
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tabst = NULL;
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else if ((tabst = value(ENAME_INDENTPREFIX)) == NULL)
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tabst = "\t";
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ig = isupper(f) ? NULL : ignore;
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(void)printf("Interpolating:");
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for (/*EMPTY*/; *msgvec != 0; msgvec++) {
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struct message *mp;
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char *fmtstr;
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mp = get_message(*msgvec);
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touch(mp);
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(void)printf(" %d", *msgvec);
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(void)fflush(stdout); /* flush stdout and the above */
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if (tabst && (fmtstr = value(ENAME_INDENT_PREAMBLE)) != NULL)
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fmsgprintf(collf, fmtstr, mp);
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#ifdef MIME_SUPPORT
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mip = NULL;
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if (value(ENAME_MIME_DECODE_MSG)) {
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if ((tabst == NULL && value(ENAME_MIME_DECODE_INSERT)) ||
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(tabst != NULL && value(ENAME_MIME_DECODE_QUOTE)))
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mip = mime_decode_open(mp);
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}
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retval = mime_sendmessage(mp, fp, ig, tabst, mip);
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mime_decode_close(mip);
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if (retval < 0)
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#else
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if (sendmessage(mp, fp, ig, tabst, NULL) < 0)
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#endif
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{
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warn("%s", fn);
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return -1;
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}
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if (tabst && (fmtstr = value(ENAME_INDENT_POSTSCRIPT)) != NULL)
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fmsgprintf(collf, fmtstr, mp);
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}
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(void)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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static void
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collstop(int s)
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{
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sig_t old_action = signal(s, SIG_DFL);
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sigset_t nset;
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(void)sigemptyset(&nset);
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(void)sigaddset(&nset, s);
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(void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
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(void)kill(0, s);
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(void)sigprocmask(SIG_BLOCK, &nset, NULL);
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(void)signal(s, old_action);
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if (colljmp_p) {
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colljmp_p = 0;
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hadintr = 0;
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longjmp(colljmp, 1);
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}
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}
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/*
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* Append the contents of the file to the end of the deadletter file.
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*/
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PUBLIC void
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savedeadletter(FILE *fp)
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{
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FILE *dbuf;
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mode_t m;
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int c;
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const char *cp;
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if (fsize(fp) == 0)
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return;
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cp = getdeadletter();
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m = umask(077);
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dbuf = Fopen(cp, "a");
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(void)umask(m);
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if (dbuf == NULL)
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return;
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while ((c = getc(fp)) != EOF)
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(void)putc(c, dbuf);
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(void)Fclose(dbuf);
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rewind(fp);
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}
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/*
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* On interrupt, come here to save the partial message in ~/dead.letter.
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* Then jump out of the collection loop.
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*/
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/*ARGSUSED*/
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static void
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collint(int s __unused)
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{
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/*
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* the control flow is subtle, because we can be called from ~q.
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*/
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if (!hadintr) {
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if (value(ENAME_IGNORE) != NULL) {
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(void)puts("@");
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(void)fflush(stdout);
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clearerr(stdin);
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return;
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}
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hadintr = 1;
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longjmp(colljmp, 1);
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}
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rewind(collf);
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if (value(ENAME_NOSAVE) == NULL)
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savedeadletter(collf);
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longjmp(collabort, 1);
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}
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/*ARGSUSED*/
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static void
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collhup(int s __unused)
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{
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rewind(collf);
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savedeadletter(collf);
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/*
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* Let's pretend nobody else wants to clean up,
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* a true statement at this time.
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*/
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exit(1);
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}
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PUBLIC 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;
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int c, fd, t;
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char linebuf[LINESIZE];
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const char *cp;
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char tempname[PATHSIZE];
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char mailtempname[PATHSIZE];
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int 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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int eofcount;
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int longline;
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sigset_t nset;
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/* The following are declared volatile to avoid longjmp clobbering. */
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char volatile getsub;
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int volatile escape;
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(void)memset(mailtempname, 0, sizeof(mailtempname));
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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(mailtempname);
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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(mailtempname, sizeof(mailtempname),
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"%s/mail.RsXXXXXXXXXX", tmpdir);
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if ((fd = mkstemp(mailtempname)) == -1 ||
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(collf = Fdopen(fd, "w+")) == NULL) {
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if (fd != -1)
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(void)close(fd);
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warn("%s", mailtempname);
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goto err;
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}
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(void)rm(mailtempname);
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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|GSMOPTS;
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getsub = 0;
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if (hp->h_subject == NULL && value(ENAME_INTERACTIVE) != NULL &&
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(value(ENAME_ASK) != NULL || value(ENAME_ASKSUB) != NULL))
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t &= ~GNL, getsub++;
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if (printheaders) {
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(void)puthead(hp, stdout, t);
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(void)fflush(stdout);
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}
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if ((cp = value(ENAME_ESCAPE)) != NULL)
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escape = *cp;
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else
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escape = ESCAPE;
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hadintr = 0; /* static - no longjmp problem */
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if (!setjmp(colljmp)) {
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if (getsub)
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(void)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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(void)fprintf(stderr,
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"\n(Interrupt -- one more to kill letter)\n");
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} else {
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(void)printf("(continue)\n");
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(void)fflush(stdout);
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}
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}
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eofcount = 0; /* reset after possible longjmp */
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longline = 0; /* reset after possible longjmp */
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for (;;) {
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colljmp_p = 1;
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c = mail_readline(stdin, linebuf, LINESIZE);
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colljmp_p = 0;
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#ifdef USE_EDITLINE
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if (c < 0) {
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char *p;
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if (value(ENAME_INTERACTIVE) != NULL &&
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(p = value(ENAME_IGNOREEOF)) != NULL &&
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++eofcount < (*p == 0 ? 25 : atoi(p))) {
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(void)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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#else
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if (c < 0) {
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if (value(ENAME_INTERACTIVE) != NULL &&
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value(ENAME_IGNOREEOF) != NULL && ++eofcount < 25) {
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(void)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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#endif
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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(ENAME_INTERACTIVE) != NULL && !lastlong &&
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(value(ENAME_DOT) != NULL || value(ENAME_IGNOREEOF) != NULL))
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break;
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if (linebuf[0] != escape || value(ENAME_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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(void)printf("Unknown tilde escape.\n");
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break;
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#ifdef MIME_SUPPORT
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case '@':
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hp->h_attach = mime_attach_files(hp->h_attach, &linebuf[2]);
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break;
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#endif
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case 'C':
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/*
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* Dump core.
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*/
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(void)core(NULL);
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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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(void)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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(void)execute(&linebuf[2], ec_composing);
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goto cont;
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case '.':
|
|
/*
|
|
* Simulate end of file on input.
|
|
*/
|
|
goto out;
|
|
case 'q':
|
|
/*
|
|
* Force a quit of sending mail.
|
|
* Act like an interrupt happened.
|
|
*/
|
|
hadintr++;
|
|
collint(SIGINT);
|
|
exit(1);
|
|
/*NOTREACHED*/
|
|
|
|
case 'x': /* exit, do not save in dead.letter */
|
|
goto err;
|
|
|
|
case 'h':
|
|
/*
|
|
* Grab a bunch of headers.
|
|
*/
|
|
(void)grabh(hp, GTO|GSUBJECT|GCC|GBCC|GSMOPTS);
|
|
goto cont;
|
|
case 't':
|
|
/*
|
|
* Add to the To list.
|
|
*/
|
|
hp->h_to = cat(hp->h_to, extract(&linebuf[2], GTO));
|
|
break;
|
|
case 's':
|
|
/*
|
|
* Set the Subject list.
|
|
*/
|
|
cp = skip_WSP(&linebuf[2]);
|
|
hp->h_subject = savestr(cp);
|
|
break;
|
|
case 'c':
|
|
/*
|
|
* Add to the CC list.
|
|
*/
|
|
hp->h_cc = cat(hp->h_cc, extract(&linebuf[2], GCC));
|
|
break;
|
|
case 'b':
|
|
/*
|
|
* Add stuff to blind carbon copies list.
|
|
*/
|
|
hp->h_bcc = cat(hp->h_bcc, extract(&linebuf[2], GBCC));
|
|
break;
|
|
case 'i':
|
|
case 'A':
|
|
case 'a':
|
|
/*
|
|
* Insert named variable in message
|
|
*/
|
|
|
|
switch(c) {
|
|
case 'i':
|
|
cp = skip_WSP(&linebuf[2]);
|
|
break;
|
|
case 'a':
|
|
cp = "sign";
|
|
break;
|
|
case 'A':
|
|
cp = "Sign";
|
|
break;
|
|
default:
|
|
goto err;
|
|
}
|
|
|
|
if (*cp && (cp = value(cp)) != NULL) {
|
|
(void)printf("%s\n", cp);
|
|
if (putline(collf, cp, 1) < 0)
|
|
goto err;
|
|
}
|
|
|
|
break;
|
|
|
|
case 'd':
|
|
(void)strcpy(linebuf + 2, getdeadletter());
|
|
/* FALLTHROUGH */
|
|
case 'r':
|
|
case '<':
|
|
/*
|
|
* Invoke a file:
|
|
* Search for the file name,
|
|
* then open it and copy the contents to collf.
|
|
*/
|
|
cp = skip_WSP(&linebuf[2]);
|
|
if (*cp == '\0') {
|
|
(void)printf("Interpolate what file?\n");
|
|
break;
|
|
}
|
|
|
|
cp = expand(cp);
|
|
if (cp == NULL)
|
|
break;
|
|
|
|
if (*cp == '!') { /* insert stdout of command */
|
|
const char *shellcmd;
|
|
int nullfd;
|
|
int rc2;
|
|
|
|
if ((nullfd = open("/dev/null", O_RDONLY, 0)) == -1) {
|
|
warn("/dev/null");
|
|
break;
|
|
}
|
|
|
|
(void)snprintf(tempname, sizeof(tempname),
|
|
"%s/mail.ReXXXXXXXXXX", tmpdir);
|
|
if ((fd = mkstemp(tempname)) == -1 ||
|
|
(fbuf = Fdopen(fd, "w+")) == NULL) {
|
|
if (fd != -1)
|
|
(void)close(fd);
|
|
warn("%s", tempname);
|
|
break;
|
|
}
|
|
(void)unlink(tempname);
|
|
|
|
if ((shellcmd = value(ENAME_SHELL)) == NULL)
|
|
shellcmd = _PATH_CSHELL;
|
|
|
|
rc2 = run_command(shellcmd, 0, nullfd, fileno(fbuf), "-c", cp + 1, NULL);
|
|
|
|
(void)close(nullfd);
|
|
|
|
if (rc2 < 0) {
|
|
(void)Fclose(fbuf);
|
|
break;
|
|
}
|
|
|
|
if (fsize(fbuf) == 0) {
|
|
(void)fprintf(stderr, "No bytes from command \"%s\"\n", cp + 1);
|
|
(void)Fclose(fbuf);
|
|
break;
|
|
}
|
|
|
|
rewind(fbuf);
|
|
}
|
|
else if (isdir(cp)) {
|
|
(void)printf("%s: Directory\n", cp);
|
|
break;
|
|
}
|
|
else if ((fbuf = Fopen(cp, "r")) == NULL) {
|
|
warn("%s", cp);
|
|
break;
|
|
}
|
|
(void)printf("\"%s\" ", cp);
|
|
(void)fflush(stdout);
|
|
lc = 0;
|
|
cc = 0;
|
|
while ((rc = mail_readline(fbuf, linebuf, LINESIZE)) >= 0) {
|
|
if (rc != LINESIZE-1) lc++;
|
|
if ((t = putline(collf, linebuf,
|
|
rc != LINESIZE-1)) < 0) {
|
|
(void)Fclose(fbuf);
|
|
goto err;
|
|
}
|
|
cc += t;
|
|
}
|
|
(void)Fclose(fbuf);
|
|
(void)printf("%d/%d\n", lc, cc);
|
|
break;
|
|
case 'w':
|
|
/*
|
|
* Write the message on a file.
|
|
*/
|
|
cp = skip_WSP(&linebuf[2]);
|
|
if (*cp == '\0') {
|
|
(void)fprintf(stderr, "Write what file!?\n");
|
|
break;
|
|
}
|
|
if ((cp = expand(cp)) == NULL)
|
|
break;
|
|
rewind(collf);
|
|
(void)exwrite(cp, collf, 1);
|
|
break;
|
|
case 'm':
|
|
case 'M':
|
|
case 'f':
|
|
case 'F':
|
|
/*
|
|
* Interpolate the named messages, if we
|
|
* are in receiving mail mode. Does the
|
|
* standard list processing garbage.
|
|
* If ~f is given, we don't shift over.
|
|
*/
|
|
if (interpolate(linebuf + 2, collf, mailtempname, c) < 0)
|
|
goto err;
|
|
goto cont;
|
|
case '?':
|
|
cathelp(_PATH_TILDE);
|
|
break;
|
|
case 'p':
|
|
/*
|
|
* Print out the current state of the
|
|
* message without altering anything.
|
|
*/
|
|
rewind(collf);
|
|
(void)printf("-------\nMessage contains:\n");
|
|
(void)puthead(hp, stdout, GTO|GSUBJECT|GCC|GBCC|GNL);
|
|
while ((t = getc(collf)) != EOF)
|
|
(void)putchar(t);
|
|
goto cont;
|
|
case '|':
|
|
/*
|
|
* Pipe message through command.
|
|
* Collect output as new message.
|
|
*/
|
|
rewind(collf);
|
|
mespipe(collf, &linebuf[2]);
|
|
goto cont;
|
|
case 'v':
|
|
case 'e':
|
|
/*
|
|
* Edit the current message.
|
|
* 'e' means to use EDITOR
|
|
* 'v' means to use VISUAL
|
|
*/
|
|
rewind(collf);
|
|
mesedit(collf, c);
|
|
goto cont;
|
|
}
|
|
}
|
|
goto out;
|
|
err:
|
|
if (collf != NULL) {
|
|
(void)Fclose(collf);
|
|
collf = NULL;
|
|
}
|
|
out:
|
|
if (collf != NULL)
|
|
rewind(collf);
|
|
noreset--;
|
|
(void)sigprocmask(SIG_BLOCK, &nset, NULL);
|
|
(void)signal(SIGINT, saveint);
|
|
(void)signal(SIGHUP, savehup);
|
|
(void)signal(SIGTSTP, savetstp);
|
|
(void)signal(SIGTTOU, savettou);
|
|
(void)signal(SIGTTIN, savettin);
|
|
(void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
|
|
return collf;
|
|
}
|