OpenBSD-4.6/usr.bin/mail/collect.c
/* $OpenBSD: collect.c,v 1.30 2008/11/03 15:42:35 martynas Exp $ */
/* $NetBSD: collect.c,v 1.9 1997/07/09 05:25:45 mikel 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.
*/
#ifndef lint
#if 0
static const char sccsid[] = "@(#)collect.c 8.2 (Berkeley) 4/19/94";
#else
static const char rcsid[] = "$OpenBSD: collect.c,v 1.30 2008/11/03 15:42:35 martynas Exp $";
#endif
#endif /* not lint */
/*
* Mail -- a mail program
*
* Collect input from standard input, handling
* ~ escapes.
*/
#include "rcv.h"
#include "extern.h"
/*
* Read a message from standard output 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 FILE *collf; /* File for saving away */
static int hadintr; /* Have seen one SIGINT so far */
FILE *
collect(struct header *hp, int printheaders)
{
FILE *fbuf;
int lc, cc, fd, c, t, lastlong, rc, sig;
int escape, eofcount, longline;
char getsub;
char linebuf[LINESIZE], tempname[PATHSIZE], *cp;
collf = NULL;
eofcount = 0;
hadintr = 0;
lastlong = 0;
longline = 0;
if ((cp = value("escape")) != NULL)
escape = *cp;
else
escape = ESCAPE;
noreset++;
(void)snprintf(tempname, sizeof(tempname),
"%s/mail.RsXXXXXXXXXX", tmpdir);
if ((fd = mkstemp(tempname)) == -1 ||
(collf = Fdopen(fd, "w+")) == NULL) {
warn("%s", tempname);
goto err;
}
(void)rm(tempname);
/*
* 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;
getsub = 0;
if (hp->h_subject == NULL && value("interactive") != NULL &&
(value("ask") != NULL || value("asksub") != NULL))
t &= ~GNL, getsub++;
if (printheaders) {
puthead(hp, stdout, t);
fflush(stdout);
}
if (getsub && gethfromtty(hp, GSUBJECT) == -1)
goto err;
if (0) {
cont:
/* Come here for printing the after-suspend message. */
if (isatty(0)) {
puts("(continue)");
fflush(stdout);
}
}
for (;;) {
c = readline(stdin, linebuf, LINESIZE, &sig);
/* Act on any signal caught during readline() ignoring 'c' */
switch (sig) {
case 0:
break;
case SIGINT:
if (collabort())
goto err;
continue;
case SIGHUP:
rewind(collf);
savedeadletter(collf);
/*
* Let's pretend nobody else wants to clean up,
* a true statement at this time.
*/
exit(1);
default:
/* Stopped due to job control */
(void)kill(0, sig);
goto cont;
}
/* No signal, check for error */
if (c < 0) {
if (value("interactive") != NULL &&
value("ignoreeof") != NULL && ++eofcount < 25) {
puts("Use \".\" to terminate letter");
continue;
}
break;
}
lastlong = longline;
longline = (c == LINESIZE - 1);
eofcount = 0;
hadintr = 0;
if (linebuf[0] == '.' && linebuf[1] == '\0' &&
value("interactive") != NULL && !lastlong &&
(value("dot") != NULL || value("ignoreeof") != NULL))
break;
if (linebuf[0] != escape || value("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;
}
puts("Unknown tilde escape.");
break;
case 'C':
/*
* Dump core.
*/
core(NULL);
break;
case '!':
/*
* Shell escape, send the balance of the
* line to sh -c.
*/
shell(&linebuf[2]);
break;
case ':':
case '_':
/*
* Escape to command mode, but be nice!
*/
execute(&linebuf[2], 1);
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++;
collabort();
fputs("Interrupt\n", stderr);
goto err;
case 'x':
/*
* Force a quit of sending mail.
* Do not save the message.
*/
goto err;
case 'h':
/*
* Grab a bunch of headers.
*/
grabh(hp, GTO|GSUBJECT|GCC|GBCC);
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 = &linebuf[2];
while (isspace(*cp))
cp++;
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 'd':
linebuf[2] = '\0';
strlcat(linebuf, getdeadletter(), sizeof(linebuf));
/* fall into . . . */
case 'r':
case '<':
/*
* Invoke a file:
* Search for the file name,
* then open it and copy the contents to collf.
*/
cp = &linebuf[2];
while (isspace(*cp))
cp++;
if (*cp == '\0') {
puts("Interpolate what file?");
break;
}
cp = expand(cp);
if (cp == NULL)
break;
if (isdir(cp)) {
printf("%s: Directory\n", cp);
break;
}
if ((fbuf = Fopen(cp, "r")) == NULL) {
warn("%s", cp);
break;
}
printf("\"%s\" ", cp);
fflush(stdout);
lc = 0;
cc = 0;
while ((rc = readline(fbuf, linebuf, LINESIZE, NULL)) >= 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);
printf("%d/%d\n", lc, cc);
break;
case 'w':
/*
* Write the message on a file.
*/
cp = &linebuf[2];
while (*cp == ' ' || *cp == '\t')
cp++;
if (*cp == '\0') {
fputs("Write what file!?\n", stderr);
break;
}
if ((cp = expand(cp)) == NULL)
break;
rewind(collf);
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 (forward(linebuf + 2, collf, tempname, c) < 0)
goto err;
goto cont;
case '?':
if ((fbuf = Fopen(_PATH_TILDE, "r")) == NULL) {
warn(_PATH_TILDE);
break;
}
while ((t = getc(fbuf)) != EOF)
(void)putchar(t);
(void)Fclose(fbuf);
break;
case 'p':
/*
* Print out the current state of the
* message without altering anything.
*/
rewind(collf);
puts("-------\nMessage contains:");
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;
}
}
if (value("interactive") != NULL) {
if (value("askcc") != NULL || value("askbcc") != NULL) {
if (value("askcc") != NULL) {
if (gethfromtty(hp, GCC) == -1)
goto err;
}
if (value("askbcc") != NULL) {
if (gethfromtty(hp, GBCC) == -1)
goto err;
}
} else {
puts("EOT");
(void)fflush(stdout);
}
}
goto out;
err:
if (collf != NULL) {
(void)Fclose(collf);
collf = NULL;
}
out:
if (collf != NULL)
rewind(collf);
noreset--;
return(collf);
}
/*
* Write a file, ex-like if f set.
*/
int
exwrite(char *name, FILE *fp, int f)
{
FILE *of;
int c;
ssize_t cc, lc;
struct stat junk;
if (f) {
printf("\"%s\" ", name);
fflush(stdout);
}
if (stat(name, &junk) >= 0 && S_ISREG(junk.st_mode)) {
if (!f)
fprintf(stderr, "%s: ", name);
fputs("File exists\n", stderr);
return(-1);
}
if ((of = Fopen(name, "w")) == NULL) {
warn(NULL);
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);
printf("%lld/%lld\n", (long long)lc, (long long)cc);
fflush(stdout);
return(0);
}
/*
* Edit the message being collected on fp.
* On return, make the edit file the new temp file.
*/
void
mesedit(FILE *fp, int c)
{
FILE *nf;
struct sigaction oact;
sigset_t oset;
(void)ignoresig(SIGINT, &oact, &oset);
nf = run_editor(fp, (off_t)-1, c, 0);
if (nf != NULL) {
fseek(nf, 0L, SEEK_END);
collf = nf;
(void)Fclose(fp);
}
(void)sigprocmask(SIG_SETMASK, &oset, NULL);
(void)sigaction(SIGINT, &oact, NULL);
}
/*
* Pipe the message through the command.
* Old message is on stdin of command;
* New message collected from stdout.
* Sh -c must return 0 to accept the new message.
*/
void
mespipe(FILE *fp, char *cmd)
{
FILE *nf;
int fd;
char *shell, tempname[PATHSIZE];
struct sigaction oact;
sigset_t oset;
(void)ignoresig(SIGINT, &oact, &oset);
(void)snprintf(tempname, sizeof(tempname),
"%s/mail.ReXXXXXXXXXX", tmpdir);
if ((fd = mkstemp(tempname)) == -1 ||
(nf = Fdopen(fd, "w+")) == NULL) {
warn("%s", tempname);
goto out;
}
(void)rm(tempname);
/*
* stdin = current message.
* stdout = new message.
*/
shell = value("SHELL");
if (run_command(shell,
0, fileno(fp), fileno(nf), "-c", cmd, NULL) < 0) {
(void)Fclose(nf);
goto out;
}
if (fsize(nf) == 0) {
fprintf(stderr, "No bytes from \"%s\" !?\n", cmd);
(void)Fclose(nf);
goto out;
}
/*
* Take new files.
*/
(void)fseek(nf, 0L, SEEK_END);
collf = nf;
(void)Fclose(fp);
out:
(void)sigprocmask(SIG_SETMASK, &oset, NULL);
(void)sigaction(SIGINT, &oact, NULL);
}
/*
* Interpolate the named messages into the current
* message, preceding each line with a tab.
* Return a count of the number of characters now in
* the message, or -1 if an error is encountered writing
* the message temporary. The flag argument is 'm' if we
* should shift over and 'f' if not.
*/
int
forward(char *ms, FILE *fp, char *fn, int f)
{
int *msgvec;
struct ignoretab *ig;
char *tabst;
msgvec = (int *)salloc((msgCount+1) * sizeof(*msgvec));
if (msgvec == NULL)
return(0);
if (getmsglist(ms, msgvec, 0) < 0)
return(0);
if (*msgvec == 0) {
*msgvec = first(0, MMNORM);
if (*msgvec == 0) {
puts("No appropriate messages");
return(0);
}
msgvec[1] = NULL;
}
if (tolower(f) == 'f')
tabst = NULL;
else if ((tabst = value("indentprefix")) == NULL)
tabst = "\t";
ig = isupper(f) ? NULL : ignore;
fputs("Interpolating:", stdout);
for (; *msgvec != 0; msgvec++) {
struct message *mp = message + *msgvec - 1;
touch(mp);
printf(" %d", *msgvec);
if (sendmessage(mp, fp, ig, tabst) < 0) {
warn("%s", fn);
return(-1);
}
}
putchar('\n');
return(0);
}
/*
* User aborted during message composition.
* Save the partial message in ~/dead.letter.
*/
int
collabort(void)
{
/*
* the control flow is subtle, because we can be called from ~q.
*/
if (hadintr == 0 && isatty(0)) {
if (value("ignore") != NULL) {
puts("@");
fflush(stdout);
clearerr(stdin);
} else {
fflush(stdout);
fputs("\n(Interrupt -- one more to kill letter)\n",
stderr);
hadintr++;
}
return(0);
}
fflush(stdout);
rewind(collf);
if (value("nosave") == NULL)
savedeadletter(collf);
return(1);
}
void
savedeadletter(FILE *fp)
{
FILE *dbuf;
int c;
char *cp;
if (fsize(fp) == 0)
return;
cp = getdeadletter();
c = umask(077);
dbuf = Fopen(cp, "a");
(void)umask(c);
if (dbuf == NULL)
return;
while ((c = getc(fp)) != EOF)
(void)putc(c, dbuf);
(void)Fclose(dbuf);
rewind(fp);
}
int
gethfromtty(struct header *hp, int gflags)
{
hadintr = 0;
while (grabh(hp, gflags) != 0) {
if (collabort())
return(-1);
}
return(0);
}