/*
 * |-----------------------------------------------------------|
 * | Copyright (c) 1991, 1990 MIPS Computer Systems, Inc.      |
 * | All Rights Reserved                                       |
 * |-----------------------------------------------------------|
 * |          Restricted Rights Legend                         |
 * | Use, duplication, or disclosure by the Government is      |
 * | subject to restrictions as set forth in                   |
 * | subparagraph (c)(1)(ii) of the Rights in Technical        |
 * | Data and Computer Software Clause of DFARS 252.227-7013.  |
 * |         MIPS Computer Systems, Inc.                       |
 * |         950 DeGuigne Avenue                               |
 * |         Sunnyvale, California 94088-3650, USA             |
 * |-----------------------------------------------------------|
 */
#ident	"$Header: send.c,v 1.8.2.1 92/06/24 13:37:00 marker Exp $"
/*	Copyright (c) 1984 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

#

#include "rcv.h"
typedef	SIG	(*sigtype)();
extern time_t time();

#ifdef VMUNIX
#include <wait.h>
#endif
#include <ctype.h>

/*
 * mailx -- a modified version of a University of California at Berkeley
 *	mail program
 *
 * Mail to others.
 */


/*
 * Send message described by the passed pointer to the
 * passed output buffer.  Return -1 on error, but normally
 * the number of lines written.  Adjust the status: field
 * if need be.  If doign is set, suppress ignored header fields.
 */
send(mailp, obuf, doign)
	struct message *mailp;
	FILE *obuf;
{
	register struct message *mp;
	register int t;
	long c;
	FILE *ibuf;
	char line[LINESIZE], field[BUFSIZ];
	int lc, ishead, infld, fline, dostat;
	char *cp, *cp2;
	int oldign = 0;	/* previous line was ignored */

	mp = mailp;
	ibuf = setinput(mp);
	c = mp->m_size;
	ishead = 1;
	dostat = 1;
	infld = 0;
	fline = 1;
	lc = 0;
	clearerr(obuf);
	while (c > 0L) {
		fgets(line, LINESIZE, ibuf);
		c -= (long) strlen(line);
		lc++;
		if (ishead) {
			/* 
			 * First line is the From line, so no headers
			 * there to worry about
			 */
			if (fline) {
				fline = 0;
				goto writeit;
			}
			/*
			 * If line is blank, we've reached end of
			 * headers, so force out status: field
			 * and note that we are no longer in header
			 * fields
			 */
			if (line[0] == '\n') {
				if (dostat) {
					statusput(mailp, obuf, doign);
					dostat = 0;
				}
				ishead = 0;
				goto writeit;
			}
			/*
			 * If this line is a continuation
			 * of a previous header field, just echo it.
			 */
			if (isspace(line[0]) && infld)
				if (oldign)
					continue;
				else
					goto writeit;
			infld = 0;
			/*
			 * If we are no longer looking at real
			 * header lines, force out status:
			 * This happens in uucp style mail where
			 * there are no headers at all.
			 */
			if (!headerp(line)) {
				if (dostat) {
					statusput(mailp, obuf, doign);
					dostat = 0;
				}
				putc('\n', obuf);
				ishead = 0;
				goto writeit;
			}
			infld++;
			/*
			 * Pick up the header field.
			 * If it is an ignored field and
			 * we care about such things, skip it.
			 */
			cp = line;
			cp2 = field;
			while (*cp && *cp != ':' && !isspace(*cp))
				*cp2++ = *cp++;
			*cp2 = 0;
			oldign = doign && isign(field);
			if (oldign)
				continue;
			/*
			 * If the field is "status," go compute and print the
			 * real Status: field
			 */
			if (icequal(field, "status")) {
				if (dostat) {
					statusput(mailp, obuf, doign);
					dostat = 0;
				}
				continue;
			}
		}
writeit:
		fputs(line, obuf);
		if (ferror(obuf))
			return(-1);
	}
	fflush(obuf);
	if (ferror(obuf))
		return(-1);
	if (ishead && (mailp->m_flag & MSTATUS))
		printf(gettxt("mailx:167", "failed to fix up status field\n"));
	return(lc);
}

/*
 * Test if the passed line is a header line, RFC 733 style.
 */
headerp(line)
	register char *line;
{
	register char *cp = line;

	if (*cp=='>' && strncmp(cp+1, "From", 4)==0)
		return(1);
	while (*cp && !isspace(*cp) && *cp != ':')
		cp++;
	while (*cp && isspace(*cp))
		cp++;
	return(*cp == ':');
}

/*
 * Output a reasonable looking status field.
 * But if "status" is ignored and doign, forget it.
 */
statusput(mp, obuf, doign)
	register struct message *mp;
	register FILE *obuf;
{
	char statout[3];

	if (doign && isign("status"))
		return;
	if ((mp->m_flag & (MNEW|MREAD)) == MNEW)
		return;
	if (mp->m_flag & MREAD)
		strcpy(statout, "R");
	else
		strcpy(statout, "");
	if ((mp->m_flag & MNEW) == 0)
		strcat(statout, "O");
/*	Start for MNLS by Unix Pacific on Feb. 23 1989	*/
/*	fprintf(obuf, "Status: %s\n", statout); */
	fprintf(obuf, gettxt("colon:66", "Status: %s\n"), statout);
/*	end for MNLS 	*/
}


/*
 * Interface between the argument list and the mail1 routine
 * which does all the dirty work.
 */

mail(people)
	char **people;
{
	register char *cp2;
	register int s;
	char *buf, **ap;
	char *person;
	struct header head;
	char *unuucp();
	char recfile[128];

	for (s = 0, ap = people; *ap != (char *) -1; ap++)
		s += strlen(*ap) + 1;
	buf = salloc(s+1);
	cp2 = buf;
	for (ap = people; *ap != (char *) -1; ap++) {
		cp2 = copy(*ap, cp2);
		*cp2++ = ' ';
	}
	if (cp2 != buf)
		cp2--;
	*cp2 = '\0';
	head.h_to = buf;
	if (Fflag) {
		char *tp, *bp, tbuf[128];
		struct name *to;
		/*
		 * peel off the first recipient and expand a possible alias
		 */
		for (tp=tbuf, bp=buf; *bp && *bp!=' '; bp++, tp++)
			*tp = *bp;
		*tp = '\0';
		if (debug)
			fprintf(stderr, gettxt("mailx:168", "First recipient is '%s'\n"), tbuf);
		if ((to = usermap(extract(tbuf, GTO)))==NIL) {
			printf(gettxt("mailx:169", "No recipients specified\n"));
			return(1);
		}
		getrecf(to->n_name, recfile, Fflag);
	} else
		getrecf(buf, recfile, Fflag);
	head.h_subject = NOSTR;
	head.h_cc = NOSTR;
	head.h_bcc = NOSTR;
	head.h_seq = 0;
	mail1(&head, recfile);
	return(0);
}

sendm(str)
char *str;
{
	if (value("flipm") != NOSTR) 
		return(Sendmail(str));
	else return(sendmail(str));
}

Sendm(str)
char *str;
{
	if (value("flipm") != NOSTR) 
		return(sendmail(str));
	else return(Sendmail(str));
}

/*
 * Send mail to a bunch of user names.  The interface is through
 * the mail routine below.
 */

sendmail(str)
	char *str;
{
	register char **ap;
	char *bufp;
	register int t;
	struct header head;
	char recfile[128];

	if (blankline(str))
		head.h_to = NOSTR;
	else
		head.h_to = str;
	head.h_subject = NOSTR;
	head.h_cc = NOSTR;
	head.h_bcc = NOSTR;
	head.h_seq = 0;
	getrecf(head.h_to, recfile, 0);
	mail1(&head, recfile);
	return(0);
}

/*
 * Send mail to a bunch of user names.  The interface is through
 * the mail routine below.
 * save a copy of the letter
 */

Sendmail(str)
	char *str;
{
	register char **ap;
	char *bufp,recfile[128];
	register int t;
	struct header head;

	if (blankline(str))
		head.h_to = NOSTR;
	else
		head.h_to = str;
	getrecf(head.h_to,recfile,1);
	head.h_subject = NOSTR;
	head.h_cc = NOSTR;
	head.h_bcc = NOSTR;
	head.h_seq = 0;
	mail1(&head, recfile);
	return(0);
}

/*
 * Mail a message on standard input to the people indicated
 * in the passed header.  (Internal interface).
 */

mail1(hp, recfile)
	struct header *hp;
	char *recfile;
{
	int pid, i, s, p, gotcha;
	char **namelist, *deliver;
	struct name *to, *np;
	FILE *mtf;
	int remote = rflag != NOSTR || rmail;
	char **t;
	char *deadletter = Getf("DEAD");

	/*
	 * Collect user's mail from standard input.
	 * Get the result as mtf.
	 */

	pid = -1;
	if ((mtf = collect(hp)) == NULL)
		return(-1);
	hp->h_seq = 1;
	if (hp->h_subject == NOSTR)
		hp->h_subject = sflag;
	if (fsize(mtf) == 0 && hp->h_subject == NOSTR) {
		printf(gettxt("mailx:170", "No message !?!\n"));
		goto out;
	}

	if (intty && value("askbcc") != NOSTR)
		grabh(hp, GBCC);

	if (intty && value("askcc") != NOSTR)
		grabh(hp, GCC);
	else if (intty) {
		printf(gettxt("mailx:171", "EOT\n"));
		flush();
	}

	/*
	 * Now, take the user names from the combined
	 * to and cc lists and do all the alias
	 * processing.
	 */

	senderr = 0;
	to = usermap(cat(extract(hp->h_bcc, GBCC),
	    cat(extract(hp->h_to, GTO), extract(hp->h_cc, GCC))));
	if (to == NIL) {
		printf(gettxt("mailx:169", "No recipients specified\n"));
		goto topdog;
	}

	/*
	 * Look through the recipient list for names with /'s
	 * in them which we write to as files directly.
	 */

	to = outof(to, mtf, hp);
	rewind(mtf);
/*	to = verify(to); */
	if (senderr && !remote) {
topdog:

		if (fsize(mtf) != 0) {
			remove(deadletter);
			exwrite(deadletter, mtf, 1);
			rewind(mtf);
		}
	}
	for (gotcha = 0, np = to; np != NIL; np = np->n_flink)
		if ((np->n_type & GDEL) == 0) {
			gotcha++;
			np->n_name = unuucp(np->n_name);
		}
	if (!gotcha)
		goto out;
	to = elide(to);
	mechk(to);
	if (count(to) > 1)
		hp->h_seq++;
	if (hp->h_seq > 0 && !remote) {
		fixhead(hp, to);
		if (fsize(mtf) == 0)
			printf(gettxt("mailx:172", "Null message body; hope that's ok\n"));
		if ((mtf = infix(hp, mtf)) == NULL) {
			fprintf(stderr, gettxt("mailx:173", ". . . message lost, sorry.\n"));
			return(-1);
		}
	}
	namelist = unpack(to);
	if (debug) {
		fprintf(stderr, gettxt("mailx:174", "Recipients of message:\n"));
		for (t = namelist; *t != NOSTR; t++)
			fprintf(stderr, " \"%s\"", *t);
		fprintf(stderr, "\n");
		return;
	}
	if (recfile != NOSTR && *recfile)
		savemail(expand(recfile), hp, mtf);

	/*
	 * Wait, to absorb a potential zombie, then
	 * fork, set up the temporary mail file as standard
	 * input for "mail" and exec with the user list we generated
	 * far above. Return the process id to caller in case he
	 * wants to await the completion of mail.
	 */

#ifdef VMUNIX
	while (wait3(&s, WNOHANG, 0) > 0)
		;
#else
	wait(&s);
#endif
	rewind(mtf);
	pid = fork();
	if (pid == -1) {
		perror("fork");
		remove(deadletter);
		exwrite(deadletter, mtf, 1);
		goto out;
	}
	if (pid == 0) {
		sigchild();
#ifdef SIGTSTP
		if (remote == 0) {
			sigset(SIGTSTP, SIG_IGN);
			sigset(SIGTTIN, SIG_IGN);
			sigset(SIGTTOU, SIG_IGN);
		}
#endif
		sigignore(SIGHUP);
		sigignore(SIGINT);
		sigignore(SIGQUIT);
		s = fileno(mtf);
		for (i = 3; i < 15; i++)
			if (i != s)
				close(i);
		close(0);
		dup(s);
		close(s);
#ifdef CC
		submit(getpid());
#endif /* CC */
		if ((deliver = value("sendmail")) == NOSTR)
			deliver = MAIL;
		setuid(getuid());
		setgid(getgid());
		execvp(deliver, namelist);
		perror(deliver);
		exit(1);
	}

	if (value("sendwait")!=NOSTR)
		remote++;
out:
	if (remote) {
		while ((p = wait(&s)) != pid && p != -1)
			;
		if (s != 0)
			senderr++;
		pid = 0;
	}
	fclose(mtf);
	return(pid);
}

/*
 * Fix the header by glopping all of the expanded names from
 * the distribution list into the appropriate fields.
 * If there are any ARPA net recipients in the message,
 * we must insert commas, alas.
 */

fixhead(hp, tolist)
	struct header *hp;
	struct name *tolist;
{
	register struct name *nlist;
	register int f;
	register struct name *np;

	for (f = 0, np = tolist; np != NIL; np = np->n_flink)
		if (any('@', np->n_name)) {
			f |= GCOMMA;
			break;
		}

	if (debug && (f & GCOMMA))
		fprintf(stderr, gettxt("mailx:175", "Should be inserting commas in recip lists\n"));
	hp->h_to = detract(tolist, GTO|f);
	hp->h_cc = detract(tolist, GCC|f);
}

/*
 * Prepend a header in front of the collected stuff
 * and return the new file.
 */

FILE *
infix(hp, fi)
	struct header *hp;
	FILE *fi;
{
	extern char tempMail[];
	register FILE *nfo, *nfi;
	register int c;

	rewind(fi);
	if ((nfo = fopen(tempMail, "w")) == NULL) {
		perror(tempMail);
		return(fi);
	}
	if ((nfi = fopen(tempMail, "r")) == NULL) {
		perror(tempMail);
		fclose(nfo);
		return(fi);
	}
	remove(tempMail);
	puthead(hp, nfo, GTO|GSUBJECT|GCC|GNL);
	c = getc(fi);
	while (c != EOF) {
		putc(c, nfo);
		c = getc(fi);
	}
	if (ferror(fi)) {
		perror("read");
		return(fi);
	}
	fflush(nfo);
	if (ferror(nfo)) {
		perror(tempMail);
		fclose(nfo);
		fclose(nfi);
		return(fi);
	}
	fclose(nfo);
	fclose(fi);
	rewind(nfi);
	return(nfi);
}

/*
 * Dump the to, subject, cc header on the
 * passed file buffer.
 */

puthead(hp, fo, w)
	struct header *hp;
	FILE *fo;
{
	register int gotcha;

	gotcha = 0;
	if (hp->h_to != NOSTR && w & GTO)
/*	 Start for MNLS by Unix Pacific on Feb. 23 1989	*/
/*		fprintf(fo, "To: "), fmt(hp->h_to, fo), gotcha++; */
		fprintf(fo, gettxt("colon:67", "To: ")), fmt(hp->h_to, fo), gotcha++;
/*	 end for MNLS 	*/
	if (w & GSUBJECT)
		if (hp->h_subject != NOSTR && *hp->h_subject)
/*	 Start for MNLS by Unix Pacific on Feb. 23 1989	*/
/*			fprintf(fo, "Subject: %s\n", hp->h_subject), gotcha++;*/
			fprintf(fo, gettxt("colon:68", "Subject: %s\n"), hp->h_subject), gotcha++;
/*	 end for MNLS 	*/
		else
			if (sflag && *sflag)
/*	 Start for MNLS by Unix Pacific on Feb. 23 1989	*/
/*				fprintf(fo, "Subject: %s\n", sflag), gotcha++;*/
				fprintf(fo, gettxt("colon:68", "Subject: %s\n"), sflag), gotcha++;
/*	 end for MNLS 	*/
	if (hp->h_cc != NOSTR && w & GCC)
/*	 Start for MNLS by Unix Pacific on Feb. 23 1989	*/
/*		fprintf(fo, "Cc: "), fmt(hp->h_cc, fo), gotcha++; */
		fprintf(fo, gettxt("colon:70", "Cc: ")), fmt(hp->h_cc, fo), gotcha++;
/*	 end for MNLS 	*/
	if (hp->h_bcc != NOSTR && w & GBCC)
/*	 Start for MNLS by Unix Pacific on Feb. 23 1989	*/
/*		fprintf(fo, "Bcc: "), fmt(hp->h_bcc, fo), gotcha++; */
		fprintf(fo, gettxt("colon:71", "Bcc: ")), fmt(hp->h_bcc, fo), gotcha++;
/*	 end for MNLS 	*/
	if (gotcha && w & GNL)
		putc('\n', fo);
	return(0);
}

/*
 * Format the given text to not exceed 72 characters.
 */

fmt(str, fo)
	register char *str;
	register FILE *fo;
{
	register int col;
	register char *cp;

	cp = str;
	col = 0;
	while (*cp) {
		if (*cp == ' ' && col > 65) {
			fprintf(fo, "\n    ");
			col = 4;
			cp++;
			continue;
		}
		putc(*cp++, fo);
		col++;
	}
	putc('\n', fo);
}

/*
 * Save the outgoing mail on the passed file.
 */

savemail(name, hp, fi)
	char name[];
	struct header *hp;
	FILE *fi;
{
	register FILE *fo;
	register int c;
	long now;
	char *n;

	if (debug)
		fprintf(stderr, gettxt("mailx:176", "save in '%s'\n"), name);
	if ((fo = fopen(name, "a")) == NULL) {
		perror(name);
		return(-1);
	}
	time(&now);
	n = rflag;
	if (n == NOSTR)
		n = myname;
	fprintf(fo, "From %s %s", n, ctime(&now));
	rewind(fi);
	for (c = getc(fi); c != EOF; c = getc(fi))
		putc(c, fo);
	fprintf(fo, "\n");
	fflush(fo);
	if (ferror(fo))
		perror(name);
	fclose(fo);
	return(0);
}
