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BSD 4_3 release
[unix-history] / usr / src / ucb / Mail / collect.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
static char *sccsid = "@(#)collect.c 5.2 (Berkeley) 6/21/85";
#endif not lint
/*
* Mail -- a mail program
*
* Collect input from standard input, handling
* ~ escapes.
*/
#include "rcv.h"
#include <sys/stat.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. The output file must be available to flush,
* and the input to read. Several open files could be saved all through
* Mail if stdio allowed simultaneous read/write access.
*/
static int (*savesig)(); /* Previous SIGINT value */
static int (*savehup)(); /* Previous SIGHUP value */
# ifdef VMUNIX
static int (*savecont)(); /* Previous SIGCONT value */
# endif VMUNIX
static FILE *newi; /* File for saving away */
static FILE *newo; /* Output side of same */
static int hf; /* Ignore interrups */
static int hadintr; /* Have seen one SIGINT so far */
static jmp_buf coljmp; /* To get back to work */
FILE *
collect(hp)
struct header *hp;
{
FILE *ibuf, *fbuf, *obuf;
int lc, cc, escape, collrub(), intack(), collhup, collcont(), eof;
register int c, t;
char linebuf[LINESIZE], *cp;
extern char tempMail[];
int notify();
extern collintsig(), collhupsig();
char getsub;
noreset++;
ibuf = obuf = NULL;
if (value("ignore") != NOSTR)
hf = 1;
else
hf = 0;
hadintr = 0;
# ifdef VMUNIX
if ((savesig = sigset(SIGINT, SIG_IGN)) != SIG_IGN)
sigset(SIGINT, hf ? intack : collrub), sigblock(sigmask(SIGINT));
if ((savehup = sigset(SIGHUP, SIG_IGN)) != SIG_IGN)
sigset(SIGHUP, collrub), sigblock(sigmask(SIGHUP));
savecont = sigset(SIGCONT, collcont);
# else VMUNIX
savesig = signal(SIGINT, SIG_IGN);
savehup = signal(SIGHUP, SIG_IGN);
# endif VMUNIX
newi = NULL;
newo = NULL;
if ((obuf = fopen(tempMail, "w")) == NULL) {
perror(tempMail);
goto err;
}
newo = obuf;
if ((ibuf = fopen(tempMail, "r")) == NULL) {
perror(tempMail);
newo = NULL;
fclose(obuf);
goto err;
}
newi = ibuf;
remove(tempMail);
/*
* 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 (intty && sflag == NOSTR && hp->h_subject == NOSTR && value("ask"))
t &= ~GNL, getsub++;
if (hp->h_seq != 0) {
puthead(hp, stdout, t);
fflush(stdout);
}
escape = ESCAPE;
if ((cp = value("escape")) != NOSTR)
escape = *cp;
eof = 0;
for (;;) {
int omask = sigblock(0) &~ (sigmask(SIGINT)|sigmask(SIGHUP));
setjmp(coljmp);
# ifdef VMUNIX
sigsetmask(omask);
# else VMUNIX
if (savesig != SIG_IGN)
signal(SIGINT, hf ? intack : collintsig);
if (savehup != SIG_IGN)
signal(SIGHUP, collhupsig);
# endif VMUNIX
fflush(stdout);
if (getsub) {
grabh(hp, GSUBJECT);
getsub = 0;
continue;
}
if (readline(stdin, linebuf) <= 0) {
if (intty && value("ignoreeof") != NOSTR) {
if (++eof > 35)
break;
printf("Use \".\" to terminate letter\n",
escape);
continue;
}
break;
}
eof = 0;
hadintr = 0;
if (intty && equal(".", linebuf) &&
(value("dot") != NOSTR || value("ignoreeof") != NOSTR))
break;
if (linebuf[0] != escape || rflag != NOSTR) {
if ((t = putline(obuf, linebuf)) < 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(obuf, &linebuf[1]) < 0)
goto err;
else
break;
}
printf("Unknown tilde escape.\n");
break;
case 'C':
/*
* Dump core.
*/
core();
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);
printf("(continue)\n");
break;
case '.':
/*
* Simulate end of file on input.
*/
goto eofl;
case 'q':
case 'Q':
/*
* Force a quit of sending mail.
* Act like an interrupt happened.
*/
hadintr++;
collrub(SIGINT);
exit(1);
case 'h':
/*
* Grab a bunch of headers.
*/
if (!intty || !outtty) {
printf("~h: no can do!?\n");
break;
}
grabh(hp, GTO|GSUBJECT|GCC|GBCC);
printf("(continue)\n");
break;
case 't':
/*
* Add to the To list.
*/
hp->h_to = addto(hp->h_to, &linebuf[2]);
hp->h_seq++;
break;
case 's':
/*
* Set the Subject list.
*/
cp = &linebuf[2];
while (any(*cp, " \t"))
cp++;
hp->h_subject = savestr(cp);
hp->h_seq++;
break;
case 'c':
/*
* Add to the CC list.
*/
hp->h_cc = addto(hp->h_cc, &linebuf[2]);
hp->h_seq++;
break;
case 'b':
/*
* Add stuff to blind carbon copies list.
*/
hp->h_bcc = addto(hp->h_bcc, &linebuf[2]);
hp->h_seq++;
break;
case 'd':
copy(deadletter, &linebuf[2]);
/* fall into . . . */
case 'r':
/*
* Invoke a file:
* Search for the file name,
* then open it and copy the contents to obuf.
*/
cp = &linebuf[2];
while (any(*cp, " \t"))
cp++;
if (*cp == '\0') {
printf("Interpolate what file?\n");
break;
}
cp = expand(cp);
if (cp == NOSTR)
break;
if (isdir(cp)) {
printf("%s: directory\n");
break;
}
if ((fbuf = fopen(cp, "r")) == NULL) {
perror(cp);
break;
}
printf("\"%s\" ", cp);
fflush(stdout);
lc = 0;
cc = 0;
while (readline(fbuf, linebuf) > 0) {
lc++;
if ((t = putline(obuf, linebuf)) < 0) {
fclose(fbuf);
goto err;
}
cc += t;
}
fclose(fbuf);
printf("%d/%d\n", lc, cc);
break;
case 'w':
/*
* Write the message on a file.
*/
cp = &linebuf[2];
while (any(*cp, " \t"))
cp++;
if (*cp == '\0') {
fprintf(stderr, "Write what file!?\n");
break;
}
if ((cp = expand(cp)) == NOSTR)
break;
fflush(obuf);
rewind(ibuf);
exwrite(cp, ibuf, 1);
break;
case 'm':
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 (!rcvmode) {
printf("No messages to send from!?!\n");
break;
}
cp = &linebuf[2];
while (any(*cp, " \t"))
cp++;
if (forward(cp, obuf, c) < 0)
goto err;
printf("(continue)\n");
break;
case '?':
if ((fbuf = fopen(THELPFILE, "r")) == NULL) {
perror(THELPFILE);
break;
}
t = getc(fbuf);
while (t != -1) {
putchar(t);
t = getc(fbuf);
}
fclose(fbuf);
break;
case 'p':
/*
* Print out the current state of the
* message without altering anything.
*/
fflush(obuf);
rewind(ibuf);
printf("-------\nMessage contains:\n");
puthead(hp, stdout, GTO|GSUBJECT|GCC|GBCC|GNL);
t = getc(ibuf);
while (t != EOF) {
putchar(t);
t = getc(ibuf);
}
printf("(continue)\n");
break;
case '^':
case '|':
/*
* Pipe message through command.
* Collect output as new message.
*/
obuf = mespipe(ibuf, obuf, &linebuf[2]);
newo = obuf;
ibuf = newi;
newi = ibuf;
printf("(continue)\n");
break;
case 'v':
case 'e':
/*
* Edit the current message.
* 'e' means to use EDITOR
* 'v' means to use VISUAL
*/
if ((obuf = mesedit(ibuf, obuf, c)) == NULL)
goto err;
newo = obuf;
ibuf = newi;
printf("(continue)\n");
break;
}
}
eofl:
fclose(obuf);
rewind(ibuf);
sigset(SIGINT, savesig);
sigset(SIGHUP, savehup);
# ifdef VMUNIX
sigset(SIGCONT, savecont);
sigsetmask(0);
# endif VMUNIX
noreset = 0;
return(ibuf);
err:
if (ibuf != NULL)
fclose(ibuf);
if (obuf != NULL)
fclose(obuf);
sigset(SIGINT, savesig);
sigset(SIGHUP, savehup);
# ifdef VMUNIX
sigset(SIGCONT, savecont);
sigsetmask(0);
# endif VMUNIX
noreset = 0;
return(NULL);
}
/*
* Non destructively interrogate the value of the given signal.
*/
psig(n)
{
register (*wassig)();
wassig = sigset(n, SIG_IGN);
sigset(n, wassig);
return((int) wassig);
}
/*
* Write a file, ex-like if f set.
*/
exwrite(name, ibuf, f)
char name[];
FILE *ibuf;
{
register FILE *of;
register int c;
long cc;
int lc;
struct stat junk;
if (f) {
printf("\"%s\" ", name);
fflush(stdout);
}
if (stat(name, &junk) >= 0 && (junk.st_mode & S_IFMT) == S_IFREG) {
if (!f)
fprintf(stderr, "%s: ", name);
fprintf(stderr, "File exists\n", name);
return(-1);
}
if ((of = fopen(name, "w")) == NULL) {
perror(NOSTR);
return(-1);
}
lc = 0;
cc = 0;
while ((c = getc(ibuf)) != EOF) {
cc++;
if (c == '\n')
lc++;
putc(c, of);
if (ferror(of)) {
perror(name);
fclose(of);
return(-1);
}
}
fclose(of);
printf("%d/%ld\n", lc, cc);
fflush(stdout);
return(0);
}
/*
* Edit the message being collected on ibuf and obuf.
* Write the message out onto some poorly-named temp file
* and point an editor at it.
*
* On return, make the edit file the new temp file.
*/
FILE *
mesedit(ibuf, obuf, c)
FILE *ibuf, *obuf;
{
int pid, s;
FILE *fbuf;
register int t;
int (*sig)(), (*scont)(), signull();
struct stat sbuf;
extern char tempMail[], tempEdit[];
register char *edit;
sig = sigset(SIGINT, SIG_IGN);
# ifdef VMUNIX
scont = sigset(SIGCONT, signull);
# endif VMUNIX
if (stat(tempEdit, &sbuf) >= 0) {
printf("%s: file exists\n", tempEdit);
goto out;
}
close(creat(tempEdit, 0600));
if ((fbuf = fopen(tempEdit, "w")) == NULL) {
perror(tempEdit);
goto out;
}
fflush(obuf);
rewind(ibuf);
t = getc(ibuf);
while (t != EOF) {
putc(t, fbuf);
t = getc(ibuf);
}
fflush(fbuf);
if (ferror(fbuf)) {
perror(tempEdit);
remove(tempEdit);
goto fix;
}
fclose(fbuf);
if ((edit = value(c == 'e' ? "EDITOR" : "VISUAL")) == NOSTR)
edit = c == 'e' ? EDITOR : VISUAL;
pid = vfork();
if (pid == 0) {
sigchild();
if (sig != SIG_IGN)
sigsys(SIGINT, SIG_DFL);
execl(edit, edit, tempEdit, 0);
perror(edit);
_exit(1);
}
if (pid == -1) {
perror("fork");
remove(tempEdit);
goto out;
}
while (wait(&s) != pid)
;
if ((s & 0377) != 0) {
printf("Fatal error in \"%s\"\n", edit);
remove(tempEdit);
goto out;
}
/*
* Now switch to new file.
*/
if ((fbuf = fopen(tempEdit, "a")) == NULL) {
perror(tempEdit);
remove(tempEdit);
goto out;
}
if ((ibuf = fopen(tempEdit, "r")) == NULL) {
perror(tempEdit);
fclose(fbuf);
remove(tempEdit);
goto out;
}
remove(tempEdit);
fclose(obuf);
fclose(newi);
obuf = fbuf;
goto out;
fix:
perror(tempEdit);
out:
# ifdef VMUNIX
sigset(SIGCONT, scont);
# endif VMUNIX
sigset(SIGINT, sig);
newi = ibuf;
return(obuf);
}
/*
* 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.
*/
FILE *
mespipe(ibuf, obuf, cmd)
FILE *ibuf, *obuf;
char cmd[];
{
register FILE *ni, *no;
int pid, s;
int (*savesig)();
char *Shell;
newi = ibuf;
if ((no = fopen(tempEdit, "w")) == NULL) {
perror(tempEdit);
return(obuf);
}
if ((ni = fopen(tempEdit, "r")) == NULL) {
perror(tempEdit);
fclose(no);
remove(tempEdit);
return(obuf);
}
remove(tempEdit);
savesig = sigset(SIGINT, SIG_IGN);
fflush(obuf);
rewind(ibuf);
if ((Shell = value("SHELL")) == NULL)
Shell = "/bin/sh";
if ((pid = vfork()) == -1) {
perror("fork");
goto err;
}
if (pid == 0) {
/*
* stdin = current message.
* stdout = new message.
*/
sigchild();
close(0);
dup(fileno(ibuf));
close(1);
dup(fileno(no));
for (s = 4; s < 15; s++)
close(s);
execl(Shell, Shell, "-c", cmd, 0);
perror(Shell);
_exit(1);
}
while (wait(&s) != pid)
;
if (s != 0 || pid == -1) {
fprintf(stderr, "\"%s\" failed!?\n", cmd);
goto err;
}
if (fsize(ni) == 0) {
fprintf(stderr, "No bytes from \"%s\" !?\n", cmd);
goto err;
}
/*
* Take new files.
*/
newi = ni;
fclose(ibuf);
fclose(obuf);
sigset(SIGINT, savesig);
return(no);
err:
fclose(no);
fclose(ni);
sigset(SIGINT, savesig);
return(obuf);
}
/*
* 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.
*/
forward(ms, obuf, f)
char ms[];
FILE *obuf;
{
register int *msgvec, *ip;
extern char tempMail[];
msgvec = (int *) salloc((msgCount+1) * sizeof *msgvec);
if (msgvec == (int *) NOSTR)
return(0);
if (getmsglist(ms, msgvec, 0) < 0)
return(0);
if (*msgvec == NULL) {
*msgvec = first(0, MMNORM);
if (*msgvec == NULL) {
printf("No appropriate messages\n");
return(0);
}
msgvec[1] = NULL;
}
printf("Interpolating:");
for (ip = msgvec; *ip != NULL; ip++) {
touch(*ip);
printf(" %d", *ip);
if (f == 'm') {
if (transmit(&message[*ip-1], obuf) < 0L) {
perror(tempMail);
return(-1);
}
} else
if (send(&message[*ip-1], obuf, 0) < 0) {
perror(tempMail);
return(-1);
}
}
printf("\n");
return(0);
}
/*
* Send message described by the passed pointer to the
* passed output buffer. Insert a tab in front of each
* line. Return a count of the characters sent, or -1
* on error.
*/
long
transmit(mailp, obuf)
struct message *mailp;
FILE *obuf;
{
register struct message *mp;
register int ch;
long c, n;
int bol;
FILE *ibuf;
mp = mailp;
ibuf = setinput(mp);
c = mp->m_size;
n = c;
bol = 1;
while (c-- > 0L) {
if (bol) {
bol = 0;
putc('\t', obuf);
n++;
if (ferror(obuf)) {
perror("/tmp");
return(-1L);
}
}
ch = getc(ibuf);
if (ch == '\n')
bol++;
putc(ch, obuf);
if (ferror(obuf)) {
perror("/tmp");
return(-1L);
}
}
return(n);
}
/*
* Print (continue) when continued after ^Z.
*/
collcont(s)
{
printf("(continue)\n");
fflush(stdout);
}
/*
* On interrupt, go here to save the partial
* message on ~/dead.letter.
* Then restore signals and execute the normal
* signal routine. We only come here if signals
* were previously set anyway.
*/
# ifndef VMUNIX
collintsig()
{
signal(SIGINT, SIG_IGN);
collrub(SIGINT);
}
collhupsig()
{
signal(SIGHUP, SIG_IGN);
collrub(SIGHUP);
}
# endif VMUNIX
collrub(s)
{
register FILE *dbuf;
register int c;
if (s == SIGINT && hadintr == 0) {
hadintr++;
fflush(stdout);
fprintf(stderr, "\n(Interrupt -- one more to kill letter)\n");
longjmp(coljmp, 1);
}
fclose(newo);
rewind(newi);
if (s == SIGINT && value("nosave") != NOSTR || fsize(newi) == 0)
goto done;
if ((dbuf = fopen(deadletter, "w")) == NULL)
goto done;
chmod(deadletter, 0600);
while ((c = getc(newi)) != EOF)
putc(c, dbuf);
fclose(dbuf);
done:
fclose(newi);
sigset(SIGINT, savesig);
sigset(SIGHUP, savehup);
# ifdef VMUNIX
sigset(SIGCONT, savecont);
# endif VMUNIX
if (rcvmode) {
if (s == SIGHUP)
hangup(SIGHUP);
else
stop(s);
}
else
exit(1);
}
/*
* Acknowledge an interrupt signal from the tty by typing an @
*/
intack(s)
{
puts("@");
fflush(stdout);
clearerr(stdin);
}
/*
* Add a string to the end of a header entry field.
*/
char *
addto(hf, news)
char hf[], news[];
{
register char *cp, *cp2, *linebuf;
if (hf == NOSTR)
hf = "";
if (*news == '\0')
return(hf);
linebuf = salloc(strlen(hf) + strlen(news) + 2);
for (cp = hf; any(*cp, " \t"); cp++)
;
for (cp2 = linebuf; *cp;)
*cp2++ = *cp++;
*cp2++ = ' ';
for (cp = news; any(*cp, " \t"); cp++)
;
while (*cp != '\0')
*cp2++ = *cp++;
*cp2 = '\0';
return(linebuf);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.