ca13337dfe
- Remove all longjmp(3) calls from signal handlers. Instead, we post to an internal signal queue and check that periodically. All signal related code is now in sig.c, except for the SIGCHLD handler which remains in popen.c as it is intimately tied to routines there. - Handle SIGPIPE in type1() regardless of mime support, or else the handler in execute() will prevent our error code from being returned resulting in 'sawcom' not being set on the first command as it should. This only affected the initial behavior of the "next" command without mime support. - Add the 'T' flag to many commands in cmdtab.c that should not look like the first command. E.g., start mail on a mailbox with multiple messages, run "set foo", then "next", and watch the second message get displayed rather than the first as is the case without the first "set" command. - Add file descriptor and file handle leak detection. Enabled by DEBUG_FILE_LEAK. This will likely disappear in the future. - Fix a long standing (since import in 1993) longjmp() bug in edstop(): the jmpbuf was invalid when quit() is called at the end of main. - Fix a long standing bug (since import in 1993) in snarf() where it didn't strip whitespace correctly if the line consisted only of whitespace. - Lint cleanup. - New Feature: "Header" command. This allows miscellaneous header fields to be added to the header, e.g., "X-Organization:" or "Reply-To:" fields. - New Feature: "page-also" variable. This allows the specification of additional commands to page. It is more flexible than "crt". - Document the "pager-off" variable: if set, it disables paging entirely.
580 lines
13 KiB
C
580 lines
13 KiB
C
/* $NetBSD: quit.c,v 1.27 2009/04/10 13:08:25 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[] = "@(#)quit.c 8.2 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: quit.c,v 1.27 2009/04/10 13:08:25 christos Exp $");
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#endif
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#endif /* not lint */
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#include "rcv.h"
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#include "extern.h"
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#include "thread.h"
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#include "sig.h"
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/*
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* Rcv -- receive mail rationally.
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*
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* Termination processing.
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*/
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/*
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* The "quit" command.
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*/
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/*ARGSUSED*/
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PUBLIC int
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quitcmd(void *v __unused)
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{
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/*
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* If we are sourcing, then return 1 so execute() can handle it.
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* Otherwise, return -1 to abort command loop.
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*/
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if (sourcing)
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return 1;
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return -1;
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}
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/*
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* Preserve all the appropriate messages back in the system
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* mailbox, and print a nice message indicated how many were
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* saved. On any error, just return -1. Else return 0.
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* Incorporate the any new mail that we found.
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*/
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static int
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writeback(FILE *res)
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{
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struct message *mp;
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int p, c;
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FILE *obuf;
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p = 0;
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if ((obuf = Fopen(mailname, "r+")) == NULL) {
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warn("%s", mailname);
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return -1;
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}
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#ifndef APPEND
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if (res != NULL) {
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while ((c = getc(res)) != EOF)
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(void)putc(c, obuf);
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(void)fflush(obuf);
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if (ferror(obuf)) {
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warn("%s", mailname);
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(void)Fclose(obuf);
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return -1;
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}
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}
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#endif
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for (mp = get_message(1); mp; mp = next_message(mp))
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if ((mp->m_flag & MPRESERVE) || (mp->m_flag & MTOUCH)==0) {
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p++;
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if (sendmessage(mp, obuf, NULL, NULL, NULL) < 0) {
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warn("%s", mailname);
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(void)Fclose(obuf);
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return -1;
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}
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}
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#ifdef APPEND
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if (res != NULL)
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while ((c = getc(res)) != EOF)
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(void)putc(c, obuf);
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#endif
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(void)fflush(obuf);
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if (!ferror(obuf))
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trunc(obuf); /* XXX or should we truncate? */
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if (ferror(obuf)) {
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warn("%s", mailname);
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(void)Fclose(obuf);
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return -1;
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}
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if (res != NULL)
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(void)Fclose(res);
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(void)Fclose(obuf);
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alter(mailname);
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if (p == 1)
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(void)printf("Held 1 message in %s\n", mailname);
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else
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(void)printf("Held %d messages in %s\n", p, mailname);
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return 0;
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}
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/*
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* Terminate an editing session by attempting to write out the user's
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* file from the temporary. Save any new stuff appended to the file.
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*/
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static void
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edstop(jmp_buf jmpbuf)
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{
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int gotcha, c;
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struct message *mp;
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FILE *obuf;
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FILE *ibuf;
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FILE *readstat;
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struct stat statb;
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char tempname[PATHSIZE];
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int fd;
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sig_check();
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if (readonly)
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return;
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readstat = NULL;
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if (Tflag != NULL) {
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if ((readstat = Fopen(Tflag, "w")) == NULL)
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Tflag = NULL;
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}
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for (mp = get_message(1), gotcha = 0; mp; mp = next_message(mp)) {
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if (mp->m_flag & MNEW) {
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mp->m_flag &= ~MNEW;
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mp->m_flag |= MSTATUS;
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}
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if (mp->m_flag & (MMODIFY|MDELETED|MSTATUS))
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gotcha++;
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if (Tflag != NULL && (mp->m_flag & (MREAD|MDELETED)) != 0) {
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char *id;
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if ((id = hfield("article-id", mp)) != NULL)
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(void)fprintf(readstat, "%s\n", id);
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}
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}
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if (Tflag != NULL)
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(void)Fclose(readstat);
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if (!gotcha || Tflag != NULL)
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goto done;
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ibuf = NULL;
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if (stat(mailname, &statb) >= 0 && statb.st_size > mailsize) {
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(void)snprintf(tempname, sizeof(tempname),
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"%s/mbox.XXXXXXXXXX", tmpdir);
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if ((fd = mkstemp(tempname)) == -1 ||
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(obuf = Fdopen(fd, "w")) == NULL) {
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warn("%s", tempname);
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if (fd != -1)
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(void)close(fd);
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sig_release();
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longjmp(jmpbuf, -11);
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}
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if ((ibuf = Fopen(mailname, "r")) == NULL) {
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warn("%s", mailname);
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(void)Fclose(obuf);
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(void)rm(tempname);
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sig_release();
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longjmp(jmpbuf, -1);
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}
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(void)fseek(ibuf, (long)mailsize, 0);
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while ((c = getc(ibuf)) != EOF)
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(void)putc(c, obuf);
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(void)fflush(obuf);
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if (ferror(obuf)) {
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warn("%s", tempname);
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(void)Fclose(obuf);
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(void)Fclose(ibuf);
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(void)rm(tempname);
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sig_release();
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longjmp(jmpbuf, -1);
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}
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(void)Fclose(ibuf);
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(void)Fclose(obuf);
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if ((ibuf = Fopen(tempname, "r")) == NULL) {
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warn("%s", tempname);
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(void)rm(tempname);
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sig_release();
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longjmp(jmpbuf, -1);
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}
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(void)rm(tempname);
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}
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(void)printf("\"%s\" ", mailname);
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(void)fflush(stdout);
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if ((obuf = Fopen(mailname, "r+")) == NULL) {
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warn("%s", mailname);
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sig_release();
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longjmp(jmpbuf, -1);
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}
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trunc(obuf);
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c = 0;
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for (mp = get_message(1); mp; mp = next_message(mp)) {
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if ((mp->m_flag & MDELETED) != 0)
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continue;
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c++;
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if (sendmessage(mp, obuf, NULL, NULL, NULL) < 0) {
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warn("%s", mailname);
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sig_release();
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longjmp(jmpbuf, -1);
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}
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}
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gotcha = (c == 0 && ibuf == NULL);
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if (ibuf != NULL) {
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while ((c = getc(ibuf)) != EOF)
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(void)putc(c, obuf);
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(void)Fclose(ibuf);
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}
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(void)fflush(obuf);
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if (ferror(obuf)) {
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warn("%s", mailname);
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sig_release();
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longjmp(jmpbuf, -1);
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}
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(void)Fclose(obuf);
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if (gotcha) {
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(void)rm(mailname);
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(void)printf("removed\n");
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} else
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(void)printf("complete\n");
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(void)fflush(stdout);
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done:
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sig_release();
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sig_check();
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}
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/*
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* Save all of the undetermined messages at the top of "mbox"
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* Save all untouched messages back in the system mailbox.
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* Remove the system mailbox, if none saved there.
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*/
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PUBLIC void
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quit(jmp_buf jmpbuf)
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{
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int mcount, p, modify, autohold, anystat, holdbit, nohold;
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_Bool append;
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FILE *ibuf, *obuf, *fbuf, *rbuf, *readstat, *abuf;
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struct message *mp;
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int c, fd;
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struct stat minfo;
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const char *mbox;
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char tempname[PATHSIZE];
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#ifdef __GNUC__ /* XXX gcc -Wuninitialized */
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ibuf = NULL;
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readstat = NULL;
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#endif
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/*
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* If we are read only, we can't do anything,
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* so just return quickly.
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*/
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if (readonly)
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return;
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#ifdef THREAD_SUPPORT
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(void)showtagscmd(NULL); /* make sure we see tagged messages */
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(void)unthreadcmd(NULL);
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#endif
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/*
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* If editing (not reading system mail box), then do the work
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* in edstop()
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*/
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if (edit) {
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edstop(jmpbuf);
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return;
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}
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/*
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* See if there any messages to save in mbox. If no, we
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* can save copying mbox to /tmp and back.
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*
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* Check also to see if any files need to be preserved.
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* Delete all untouched messages to keep them out of mbox.
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* If all the messages are to be preserved, just exit with
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* a message.
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*/
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fbuf = Fopen(mailname, "r");
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if (fbuf == NULL)
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goto newmail;
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if (flock(fileno(fbuf), LOCK_EX) == -1) {
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nolock:
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warn("Unable to lock mailbox");
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(void)Fclose(fbuf);
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return;
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}
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if (dot_lock(mailname, 1, stdout, ".") == -1)
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goto nolock;
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rbuf = NULL;
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if (fstat(fileno(fbuf), &minfo) >= 0 && minfo.st_size > mailsize) {
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(void)printf("New mail has arrived.\n");
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(void)snprintf(tempname, sizeof(tempname),
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"%s/mail.RqXXXXXXXXXX", tmpdir);
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if ((fd = mkstemp(tempname)) == -1 ||
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(rbuf = Fdopen(fd, "w")) == NULL) {
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if (fd != -1)
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(void)close(fd);
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goto newmail;
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}
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#ifdef APPEND
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(void)fseek(fbuf, (long)mailsize, 0);
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while ((c = getc(fbuf)) != EOF)
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(void)putc(c, rbuf);
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#else
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p = minfo.st_size - mailsize;
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while (p-- > 0) {
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c = getc(fbuf);
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if (c == EOF)
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goto newmail;
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(void)putc(c, rbuf);
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}
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#endif
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(void)fflush(rbuf);
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if (ferror(rbuf)) {
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warn("%s", tempname);
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(void)Fclose(rbuf);
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(void)Fclose(fbuf);
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dot_unlock(mailname);
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return;
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}
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(void)Fclose(rbuf);
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if ((rbuf = Fopen(tempname, "r")) == NULL)
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goto newmail;
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(void)rm(tempname);
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}
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/*
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* Adjust the message flags in each message.
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*/
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anystat = 0;
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autohold = value(ENAME_HOLD) != NULL;
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holdbit = autohold ? MPRESERVE : MBOX;
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nohold = MBOX|MSAVED|MDELETED|MPRESERVE;
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if (value(ENAME_KEEPSAVE) != NULL)
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nohold &= ~MSAVED;
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for (mp = get_message(1); mp; mp = next_message(mp)) {
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if (mp->m_flag & MNEW) {
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mp->m_flag &= ~MNEW;
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mp->m_flag |= MSTATUS;
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}
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if (mp->m_flag & MSTATUS)
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anystat++;
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if ((mp->m_flag & MTOUCH) == 0)
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mp->m_flag |= MPRESERVE;
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if ((mp->m_flag & nohold) == 0)
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mp->m_flag |= holdbit;
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}
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modify = 0;
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if (Tflag != NULL) {
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if ((readstat = Fopen(Tflag, "w")) == NULL)
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Tflag = NULL;
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}
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for (c = 0, p = 0, mp = get_message(1); mp; mp = next_message(mp)) {
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if (mp->m_flag & MBOX)
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c++;
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if (mp->m_flag & MPRESERVE)
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p++;
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if (mp->m_flag & MMODIFY)
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modify++;
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if (Tflag != NULL && (mp->m_flag & (MREAD|MDELETED)) != 0) {
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char *id;
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if ((id = hfield("article-id", mp)) != NULL)
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(void)fprintf(readstat, "%s\n", id);
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}
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}
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if (Tflag != NULL)
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(void)Fclose(readstat);
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if (p == get_msgCount() && !modify && !anystat) {
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(void)printf("Held %d message%s in %s\n",
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p, p == 1 ? "" : "s", mailname);
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(void)Fclose(fbuf);
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dot_unlock(mailname);
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return;
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}
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if (c == 0) {
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if (p != 0) {
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(void)writeback(rbuf);
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(void)Fclose(fbuf);
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dot_unlock(mailname);
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return;
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}
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goto cream;
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}
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/*
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* Create another temporary file and copy user's mbox file
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* darin. If there is no mbox, copy nothing.
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* If he has specified "append" don't copy his mailbox,
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* just copy saveable entries at the end.
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*/
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mbox = expand("&");
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mcount = c;
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append = value(ENAME_APPEND) != NULL;
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if (!append) {
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(void)snprintf(tempname, sizeof(tempname),
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"%s/mail.RmXXXXXXXXXX", tmpdir);
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if ((fd = mkstemp(tempname)) == -1 ||
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(obuf = Fdopen(fd, "w")) == NULL) {
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warn("%s", tempname);
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if (fd != -1)
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(void)close(fd);
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(void)Fclose(fbuf);
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dot_unlock(mailname);
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return;
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}
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if ((ibuf = Fopen(tempname, "r")) == NULL) {
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warn("%s", tempname);
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(void)rm(tempname);
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(void)Fclose(obuf);
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(void)Fclose(fbuf);
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dot_unlock(mailname);
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return;
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}
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(void)rm(tempname);
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if ((abuf = Fopen(mbox, "r")) != NULL) {
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while ((c = getc(abuf)) != EOF)
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(void)putc(c, obuf);
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(void)Fclose(abuf);
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}
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if (ferror(obuf)) {
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warn("%s", tempname);
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(void)Fclose(ibuf);
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(void)Fclose(obuf);
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(void)Fclose(fbuf);
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dot_unlock(mailname);
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return;
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}
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(void)Fclose(obuf);
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if ((fd = creat(mbox, 0600)) != -1)
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(void)close(fd);
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if ((obuf = Fopen(mbox, "r+")) == NULL) {
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warn("%s", mbox);
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(void)Fclose(ibuf);
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(void)Fclose(fbuf);
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dot_unlock(mailname);
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return;
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}
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}
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else {
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if ((obuf = Fopen(mbox, "a")) == NULL) {
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warn("%s", mbox);
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(void)Fclose(fbuf);
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dot_unlock(mailname);
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return;
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}
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(void)fchmod(fileno(obuf), 0600);
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}
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for (mp = get_message(1); mp; mp = next_message(mp))
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if (mp->m_flag & MBOX)
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if (sendmessage(mp, obuf, saveignore, NULL, NULL) < 0) {
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warn("%s", mbox);
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if (!append)
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(void)Fclose(ibuf);
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(void)Fclose(obuf);
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(void)Fclose(fbuf);
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dot_unlock(mailname);
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return;
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}
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/*
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* Copy the user's old mbox contents back
|
|
* to the end of the stuff we just saved.
|
|
* If we are appending, this is unnecessary.
|
|
*/
|
|
|
|
if (!append) {
|
|
rewind(ibuf);
|
|
c = getc(ibuf);
|
|
while (c != EOF) {
|
|
(void)putc(c, obuf);
|
|
if (ferror(obuf))
|
|
break;
|
|
c = getc(ibuf);
|
|
}
|
|
(void)Fclose(ibuf);
|
|
}
|
|
(void)fflush(obuf);
|
|
if (!ferror(obuf))
|
|
trunc(obuf); /* XXX or should we truncate? */
|
|
if (ferror(obuf)) {
|
|
warn("%s", mbox);
|
|
(void)Fclose(obuf);
|
|
(void)Fclose(fbuf);
|
|
dot_unlock(mailname);
|
|
return;
|
|
}
|
|
(void)Fclose(obuf);
|
|
if (mcount == 1)
|
|
(void)printf("Saved 1 message in mbox\n");
|
|
else
|
|
(void)printf("Saved %d messages in mbox\n", mcount);
|
|
|
|
/*
|
|
* Now we are ready to copy back preserved files to
|
|
* the system mailbox, if any were requested.
|
|
*/
|
|
|
|
if (p != 0) {
|
|
(void)writeback(rbuf);
|
|
(void)Fclose(fbuf);
|
|
dot_unlock(mailname);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Finally, remove his /var/mail file.
|
|
* If new mail has arrived, copy it back.
|
|
*/
|
|
|
|
cream:
|
|
if (rbuf != NULL) {
|
|
abuf = Fopen(mailname, "r+");
|
|
if (abuf == NULL)
|
|
goto newmail;
|
|
while ((c = getc(rbuf)) != EOF)
|
|
(void)putc(c, abuf);
|
|
(void)fflush(abuf);
|
|
if (ferror(abuf)) {
|
|
warn("%s", mailname);
|
|
(void)Fclose(abuf);
|
|
(void)Fclose(fbuf);
|
|
dot_unlock(mailname);
|
|
return;
|
|
}
|
|
(void)Fclose(rbuf);
|
|
trunc(abuf);
|
|
(void)Fclose(abuf);
|
|
alter(mailname);
|
|
(void)Fclose(fbuf);
|
|
dot_unlock(mailname);
|
|
return;
|
|
}
|
|
demail();
|
|
(void)Fclose(fbuf);
|
|
dot_unlock(mailname);
|
|
return;
|
|
|
|
newmail:
|
|
(void)printf("Thou hast new mail.\n");
|
|
if (fbuf != NULL) {
|
|
(void)Fclose(fbuf);
|
|
dot_unlock(mailname);
|
|
}
|
|
}
|