NetBSD-5.0.2/usr.bin/mail/collect.c
/* $NetBSD: collect.c,v 1.42 2007/10/29 23:20:38 christos Exp $ */
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)collect.c 8.2 (Berkeley) 4/19/94";
#else
__RCSID("$NetBSD: collect.c,v 1.42 2007/10/29 23:20:38 christos Exp $");
#endif
#endif /* not lint */
/*
* Mail -- a mail program
*
* Collect input from standard input, handling
* ~ escapes.
*/
#include <assert.h>
#include <util.h>
#include "rcv.h"
#include "extern.h"
#include "format.h"
#ifdef MIME_SUPPORT
#include "mime.h"
#endif
#include "thread.h"
/*
* Read a message from standard input and return a read file to it
* or NULL on error.
*/
/*
* The following hokiness with global variables is so that on
* receipt of an interrupt signal, the partial message can be salted
* away on dead.letter.
*/
static sig_t saveint; /* Previous SIGINT value */
static sig_t savehup; /* Previous SIGHUP value */
static sig_t savetstp; /* Previous SIGTSTP value */
static sig_t savettou; /* Previous SIGTTOU value */
static sig_t savettin; /* Previous SIGTTIN value */
static FILE *collf; /* File for saving away */
static int hadintr; /* Have seen one SIGINT so far */
static jmp_buf colljmp; /* To get back to work */
static int colljmp_p; /* whether to long jump */
static jmp_buf collabort; /* To end collection with error */
/*
* Write a file, ex-like if f set.
*/
static int
exwrite(const char name[], FILE *fp, int f)
{
FILE *of;
int c;
long cc;
int lc;
struct stat junk;
if (f) {
(void)printf("\"%s\" ", name);
(void)fflush(stdout);
}
if (stat(name, &junk) >= 0 && S_ISREG(junk.st_mode)) {
if (!f)
(void)fprintf(stderr, "%s: ", name);
(void)fprintf(stderr, "File exists\n");
return -1;
}
if ((of = Fopen(name, "w")) == NULL) {
warn("%s", name);
return -1;
}
lc = 0;
cc = 0;
while ((c = getc(fp)) != EOF) {
cc++;
if (c == '\n')
lc++;
(void)putc(c, of);
if (ferror(of)) {
warn("%s", name);
(void)Fclose(of);
return -1;
}
}
(void)Fclose(of);
(void)printf("%d/%ld\n", lc, cc);
(void)fflush(stdout);
return 0;
}
/*
* Edit the message being collected on fp.
* On return, make the edit file the new temp file.
*/
static void
mesedit(FILE *fp, int c)
{
sig_t sigint = signal(SIGINT, SIG_IGN);
FILE *nf = run_editor(fp, (off_t)-1, c, 0);
if (nf != NULL) {
(void)fseek(nf, 0L, 2);
collf = nf;
(void)Fclose(fp);
}
(void)signal(SIGINT, sigint);
}
/*
* Pipe the message through the command.
* Old message is on stdin of command;
* New message collected from stdout.
* Sh -c must return 0 to accept the new message.
*/
static void
mespipe(FILE *fp, char cmd[])
{
FILE *nf;
sig_t sigint = signal(SIGINT, SIG_IGN);
const char *shellcmd;
int fd;
char tempname[PATHSIZE];
(void)snprintf(tempname, sizeof(tempname),
"%s/mail.ReXXXXXXXXXX", tmpdir);
if ((fd = mkstemp(tempname)) == -1 ||
(nf = Fdopen(fd, "w+")) == NULL) {
if (fd != -1)
(void)close(fd);
warn("%s", tempname);
goto out;
}
(void)unlink(tempname);
/*
* stdin = current message.
* stdout = new message.
*/
if ((shellcmd = value(ENAME_SHELL)) == NULL)
shellcmd = _PATH_CSHELL;
if (run_command(shellcmd,
0, fileno(fp), fileno(nf), "-c", cmd, NULL) < 0) {
(void)Fclose(nf);
goto out;
}
if (fsize(nf) == 0) {
(void)fprintf(stderr, "No bytes from \"%s\" !?\n", cmd);
(void)Fclose(nf);
goto out;
}
/*
* Take new files.
*/
(void)fseek(nf, 0L, 2);
collf = nf;
(void)Fclose(fp);
out:
(void)signal(SIGINT, sigint);
}
/*
* Interpolate the named messages into the current
* message, preceding each line with a tab.
* Return a count of the number of characters now in
* the message, or -1 if an error is encountered writing
* the message temporary. The flag argument is 'm' if we
* should shift over and 'f' if not.
*/
static int
interpolate(char ms[], FILE *fp, char *fn, int f)
{
int *msgvec;
struct ignoretab *ig;
const char *tabst;
#ifdef MIME_SUPPORT
struct mime_info *mip;
int retval;
#endif
msgvec = salloc((get_msgCount() + 1) * sizeof(*msgvec));
if (msgvec == NULL)
return 0;
if (getmsglist(ms, msgvec, 0) < 0)
return 0;
if (*msgvec == 0) {
*msgvec = first(0, MMNORM);
if (*msgvec == 0) {
(void)printf("No appropriate messages\n");
return 0;
}
msgvec[1] = 0;
}
if (f == 'f' || f == 'F')
tabst = NULL;
else if ((tabst = value(ENAME_INDENTPREFIX)) == NULL)
tabst = "\t";
ig = isupper(f) ? NULL : ignore;
(void)printf("Interpolating:");
for (/*EMPTY*/; *msgvec != 0; msgvec++) {
struct message *mp;
char *fmtstr;
mp = get_message(*msgvec);
touch(mp);
(void)printf(" %d", *msgvec);
(void)fflush(stdout); /* flush stdout and the above */
if (tabst && (fmtstr = value(ENAME_INDENT_PREAMBLE)) != NULL)
fmsgprintf(collf, fmtstr, mp);
#ifdef MIME_SUPPORT
mip = NULL;
if (value(ENAME_MIME_DECODE_MSG)) {
if ((tabst == NULL && value(ENAME_MIME_DECODE_INSERT)) ||
(tabst != NULL && value(ENAME_MIME_DECODE_QUOTE)))
mip = mime_decode_open(mp);
}
retval = mime_sendmessage(mp, fp, ig, tabst, mip);
mime_decode_close(mip);
if (retval < 0)
#else
if (sendmessage(mp, fp, ig, tabst, NULL) < 0)
#endif
{
warn("%s", fn);
return -1;
}
if (tabst && (fmtstr = value(ENAME_INDENT_POSTSCRIPT)) != NULL)
fmsgprintf(collf, fmtstr, mp);
}
(void)printf("\n");
return 0;
}
/*
* Print (continue) when continued after ^Z.
*/
/*ARGSUSED*/
static void
collstop(int s)
{
sig_t old_action = signal(s, SIG_DFL);
sigset_t nset;
(void)sigemptyset(&nset);
(void)sigaddset(&nset, s);
(void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
(void)kill(0, s);
(void)sigprocmask(SIG_BLOCK, &nset, NULL);
(void)signal(s, old_action);
if (colljmp_p) {
colljmp_p = 0;
hadintr = 0;
longjmp(colljmp, 1);
}
}
/*
* Append the contents of the file to the end of the deadletter file.
*/
PUBLIC void
savedeadletter(FILE *fp)
{
FILE *dbuf;
mode_t m;
int c;
const char *cp;
if (fsize(fp) == 0)
return;
cp = getdeadletter();
m = umask(077);
dbuf = Fopen(cp, "a");
(void)umask(m);
if (dbuf == NULL)
return;
while ((c = getc(fp)) != EOF)
(void)putc(c, dbuf);
(void)Fclose(dbuf);
rewind(fp);
}
/*
* On interrupt, come here to save the partial message in ~/dead.letter.
* Then jump out of the collection loop.
*/
/*ARGSUSED*/
static void
collint(int s __unused)
{
/*
* the control flow is subtle, because we can be called from ~q.
*/
if (!hadintr) {
if (value(ENAME_IGNORE) != NULL) {
(void)puts("@");
(void)fflush(stdout);
clearerr(stdin);
return;
}
hadintr = 1;
longjmp(colljmp, 1);
}
rewind(collf);
if (value(ENAME_NOSAVE) == NULL)
savedeadletter(collf);
longjmp(collabort, 1);
}
/*ARGSUSED*/
static void
collhup(int s __unused)
{
rewind(collf);
savedeadletter(collf);
/*
* Let's pretend nobody else wants to clean up,
* a true statement at this time.
*/
exit(1);
}
PUBLIC FILE *
collect(struct header *hp, int printheaders)
{
FILE *fbuf;
int lc, cc;
int c, fd, t;
char linebuf[LINESIZE];
const char *cp;
char tempname[PATHSIZE];
char mailtempname[PATHSIZE];
int lastlong, rc; /* So we don't make 2 or more lines
out of a long input line. */
int eofcount;
int longline;
sigset_t nset;
/* The following are declared volatile to avoid longjmp clobbering. */
char volatile getsub;
int volatile escape;
(void)memset(mailtempname, 0, sizeof(mailtempname));
collf = NULL;
/*
* Start catching signals from here, but we're still die on interrupts
* until we're in the main loop.
*/
(void)sigemptyset(&nset);
(void)sigaddset(&nset, SIGINT);
(void)sigaddset(&nset, SIGHUP);
(void)sigprocmask(SIG_BLOCK, &nset, NULL);
if ((saveint = signal(SIGINT, SIG_IGN)) != SIG_IGN)
(void)signal(SIGINT, collint);
if ((savehup = signal(SIGHUP, SIG_IGN)) != SIG_IGN)
(void)signal(SIGHUP, collhup);
savetstp = signal(SIGTSTP, collstop);
savettou = signal(SIGTTOU, collstop);
savettin = signal(SIGTTIN, collstop);
if (setjmp(collabort) || setjmp(colljmp)) {
(void)rm(mailtempname);
goto err;
}
(void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
noreset++;
(void)snprintf(mailtempname, sizeof(mailtempname),
"%s/mail.RsXXXXXXXXXX", tmpdir);
if ((fd = mkstemp(mailtempname)) == -1 ||
(collf = Fdopen(fd, "w+")) == NULL) {
if (fd != -1)
(void)close(fd);
warn("%s", mailtempname);
goto err;
}
(void)rm(mailtempname);
/*
* If we are going to prompt for a subject,
* refrain from printing a newline after
* the headers (since some people mind).
*/
t = GTO|GSUBJECT|GCC|GNL|GSMOPTS;
getsub = 0;
if (hp->h_subject == NULL && value(ENAME_INTERACTIVE) != NULL &&
(value(ENAME_ASK) != NULL || value(ENAME_ASKSUB) != NULL))
t &= ~GNL, getsub++;
if (printheaders) {
(void)puthead(hp, stdout, t);
(void)fflush(stdout);
}
if ((cp = value(ENAME_ESCAPE)) != NULL)
escape = *cp;
else
escape = ESCAPE;
hadintr = 0; /* static - no longjmp problem */
if (!setjmp(colljmp)) {
if (getsub)
(void)grabh(hp, GSUBJECT);
} else {
/*
* Come here for printing the after-signal message.
* Duplicate messages won't be printed because
* the write is aborted if we get a SIGTTOU.
*/
cont:
if (hadintr) {
(void)fflush(stdout);
(void)fprintf(stderr,
"\n(Interrupt -- one more to kill letter)\n");
} else {
(void)printf("(continue)\n");
(void)fflush(stdout);
}
}
eofcount = 0; /* reset after possible longjmp */
longline = 0; /* reset after possible longjmp */
for (;;) {
colljmp_p = 1;
c = mail_readline(stdin, linebuf, LINESIZE);
colljmp_p = 0;
#ifdef USE_EDITLINE
if (c < 0) {
char *p;
if (value(ENAME_INTERACTIVE) != NULL &&
(p = value(ENAME_IGNOREEOF)) != NULL &&
++eofcount < (*p == 0 ? 25 : atoi(p))) {
(void)printf("Use \".\" to terminate letter\n");
continue;
}
break;
}
#else
if (c < 0) {
if (value(ENAME_INTERACTIVE) != NULL &&
value(ENAME_IGNOREEOF) != NULL && ++eofcount < 25) {
(void)printf("Use \".\" to terminate letter\n");
continue;
}
break;
}
#endif
lastlong = longline;
longline = c == LINESIZE-1;
eofcount = 0;
hadintr = 0;
if (linebuf[0] == '.' && linebuf[1] == '\0' &&
value(ENAME_INTERACTIVE) != NULL && !lastlong &&
(value(ENAME_DOT) != NULL || value(ENAME_IGNOREEOF) != NULL))
break;
if (linebuf[0] != escape || value(ENAME_INTERACTIVE) == NULL ||
lastlong) {
if (putline(collf, linebuf, !longline) < 0)
goto err;
continue;
}
c = linebuf[1];
switch (c) {
default:
/*
* On double escape, just send the single one.
* Otherwise, it's an error.
*/
if (c == escape) {
if (putline(collf, &linebuf[1], !longline) < 0)
goto err;
else
break;
}
(void)printf("Unknown tilde escape.\n");
break;
#ifdef MIME_SUPPORT
case '@':
hp->h_attach = mime_attach_files(hp->h_attach, &linebuf[2]);
break;
#endif
case 'C':
/*
* Dump core.
*/
(void)core(NULL);
break;
case '!':
/*
* Shell escape, send the balance of the
* line to sh -c.
*/
(void)shell(&linebuf[2]);
break;
case ':':
case '_':
/*
* Escape to command mode, but be nice!
*/
(void)execute(&linebuf[2], ec_composing);
goto cont;
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;
}