X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=citadel%2Fcitmail.c;h=f1c6ae8c780b1e85708f8a378520dae8d1328151;hb=5b4f25945be356aa3a8797e70bbe16355538a967;hp=4dec56b212d4846182f005687933e4f8eb226710;hpb=54b54a07b29cd57a19728f468e19cf887cda3873;p=citadel.git

diff --git a/citadel/citmail.c b/citadel/citmail.c
index 4dec56b21..f1c6ae8c7 100644
--- a/citadel/citmail.c
+++ b/citadel/citmail.c
@@ -1,796 +1,342 @@
-/*
- * citmail.c v4.0
- *
- * This program may be used as a local mail delivery agent, which will allow
- * all Citadel users to receive Internet e-mail.  To enable this functionality,
- * you must tell sendmail, smail, or whatever mailer you are using, that this
- * program is your local mail delivery agent.  This program is a direct
- * replacement for lmail, deliver, or whatever.
- *
- * Usage:
- *
- * citmail <recipient>       - Deliver a message
- * citmail -t <recipient>    - Address test mode (will not deliver)
- * citmail -i                - Run as an SMTP daemon (typically from inetd)
- *
- */
+// This program attempts to act like a local MDA if you're using sendmail or
+// some other non-Citadel MTA.  It basically just contacts the Citadel LMTP
+// listener on a unix domain socket and transmits the message.  Really though,
+// if your MTA supports LMTP then you definitely should be using that instead.
+//
+// Copyright (c) 1987-2021 by the citadel.org team
+//
+// This program is open source software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 3.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
 
 #include "sysdep.h"
 #include <stdlib.h>
 #include <unistd.h>
-#include <stdio.h>
-#include <fcntl.h>
 #include <ctype.h>
+#include <stdio.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <netdb.h>
 #include <string.h>
-#include <time.h>
 #include <pwd.h>
 #include <errno.h>
-#include <syslog.h>
+#include <stdarg.h>
+#include <limits.h>
+#include <libcitadel.h>
 #include "citadel.h"
+#include "citadel_dirs.h"
 
-#define LOCAL 0
-#define REMOTE 1
-#define UUCP 2
-#define CCITADEL 3
-
-#undef tolower
-#define tolower(x) isupper(x) ? (x+'a'-'A') : x
-
-char *monthdesc[] = {	"Jan","Feb","Mar","Apr","May","Jun",
-			"Jul","Aug","Sep","Oct","Nov","Dec" };
-
-
-
-void LoadInternetConfig();
-void get_config();
-int IsHostLocal();
-struct config config;
-
-char ALIASES[128];
-char CIT86NET[128];
-char SENDMAIL[128];
-char FALLBACK[128];
-char GW_DOMAIN[128];
-char TABLEFILE[128];
-char OUTGOING_FQDN[128];
-int RUN_NETPROC = 1;
-
-int struncmp(lstr,rstr,l)
-char lstr[],rstr[]; {
-	int pos = 0;
-	char lc,rc;
-	while (1) {
-		if (pos==l) return(0);
-		lc=tolower(lstr[pos]);
-		rc=tolower(rstr[pos]);
-		if ((lc==0)&&(rc==0)) return(0);
-		if (lc<rc) return(-1);
-		if (lc>rc) return(1);
-		pos=pos+1;
-		}
-	}
+int serv_sock;
+int debug = 0;
 
-long conv_date(sdbuf)
-char sdbuf[]; {
-	int a,b,cpos,tend,tval;
-	long now;
-	struct tm *tmbuf;
-	char dbuf[128];
-
-	strcpy(dbuf,sdbuf);
-	time(&now);
-	tmbuf = (struct tm *)localtime(&now);
-
-	/* get rid of + or - timezone mods */
-	for (a=0; a<strlen(dbuf); ++a) 
-		if ((dbuf[a]=='+')||(dbuf[a]=='-'))
-			do {
-				strcpy(&dbuf[a],&dbuf[a+1]);
-				} while ((dbuf[a]!=32)&&(dbuf[a]!=0));
-
-	/* try and extract the time by looking for colons */
-	cpos = (-1);
-	for (a=strlen(dbuf); a>=0; --a)
-		if ((dbuf[a]==':')&&(atoi(&dbuf[a-1])!=0)) cpos=a;
-	if (cpos>=0) {
-		cpos = cpos - 2;
-		tend = strlen(dbuf);
-		for (a=tend; a>=cpos; --a) if (dbuf[a]==' ') tend=a;
-
-		tmbuf->tm_hour = atoi(&dbuf[cpos]);
-		tmbuf->tm_min = atoi(&dbuf[cpos+3]);
-		tmbuf->tm_sec = atoi(&dbuf[cpos+6]);
-
-		do {
-			strcpy(&dbuf[cpos],&dbuf[cpos+1]);
-			} while ((dbuf[cpos]!=32)&&(dbuf[cpos]!=0));
-		}
+void strip_trailing_nonprint(char *buf) {
+        while ( (!IsEmptyStr(buf)) && (!isprint(buf[strlen(buf) - 1])) ) {
+                buf[strlen(buf) - 1] = 0;
+	}
+}
 
-	/* next try to extract a month */
-	
-	tval = (-1);
-	for (a=0; a<strlen(dbuf); ++a)
-		for (b=0; b<12; ++b)
-			if (!strncmp(&dbuf[a],monthdesc[b],3)) {
-				tval = b;
-				cpos = a;
-				}
-	if (tval >= 0) {
-		tmbuf->tm_mon = tval;
-		strcpy(&dbuf[cpos],&dbuf[cpos+3]);
-		}
 
-	/* now the year */
+void timeout(int signum) {
+	exit(signum);
+}
 
-	for (a=0; a<strlen(dbuf); ++a)
-		if ((atoi(&dbuf[a])>=1900) && (dbuf[a]!=32)) {
-			tmbuf->tm_year = atoi(&dbuf[a]) - 1900;
-			strcpy(&dbuf[a],&dbuf[a+4]);
-			}
 
-	/* whatever's left is the mday (hopefully) */
+int uds_connectsock(char *sockpath) {
+	int s;
+	struct sockaddr_un addr;
 
-	for (a=0; a<strlen(dbuf); ++a)
-		if ((dbuf[a]!=32)&&(atoi(&dbuf[a])>=1)&&(atoi(&dbuf[a])<=31)
-		   && ( (a==0)||(dbuf[a-1]==' ') ) ) {
-			tmbuf->tm_mday = atoi(&dbuf[a]);
-			strcpy(&dbuf[a],&dbuf[a+2]);
-			}
+	memset(&addr, 0, sizeof(addr));
+	addr.sun_family = AF_UNIX;
+	strcpy(addr.sun_path, sockpath);
 
-	return((long)mktime(tmbuf));
+	s = socket(AF_UNIX, SOCK_STREAM, 0);
+	if (s < 0) {
+		fprintf(stderr, "citmail: Can't create socket: %s\n",
+			strerror(errno));
+		exit(3);
 	}
 
-
-#ifdef NO_STRERROR
-/*
- * replacement strerror() for systems that don't have it
- */
-char *strerror(e)
-int e; {
-	static char buf[32];
-
-	sprintf(buf,"errno = %d",e);
-	return(buf);
-	}
-#endif
-
-int haschar(st,ch)
-char st[];
-int ch; {
-	int a,b;
-	b=0;
-	for (a=0; a<strlen(st); ++a) if (st[a]==ch) ++b;
-	return(b);
+	if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+		fprintf(stderr, "citmail: can't connect: %s\n",
+			strerror(errno));
+		close(s);
+		exit(3);
 	}
 
-void strip_trailing_whitespace(buf)
-char buf[]; {
-	while(isspace(buf[strlen(buf)-1]))
-		buf[strlen(buf)-1]=0;
-	}
-
-int islocalok(char recp[]) {
-
-	struct usersupp ust;
-	long lookfor;
-	char a_recp[128];
-	int found_closest_match = 0;
-	int a,us;
-	strcpy(a_recp,recp);
-	for (a=0; a<strlen(a_recp); ++a)
-		if (a_recp[a]=='_') a_recp[a]=32;
-	lookfor = (-1L); if (!struncmp(recp,"cit",3)) lookfor=atol(&recp[3]);
-	us=open("/appl/citadel/usersupp",O_RDONLY);
-	if (us>=0) {
-		while(read(us,&ust,sizeof(struct usersupp))>0) {
-			if (lookfor == ust.usernum) {
-				strcpy(recp,ust.fullname);
-				close(us);
-				return(2);
-				}
-			if (!strucmp(ust.fullname,a_recp)) {
-				strcpy(recp,ust.fullname);
-				close(us);
-				return(3);
-				}
-			if (!struncmp(ust.fullname,a_recp,strlen(a_recp))) {
-				strcpy(recp,ust.fullname);
-				found_closest_match = 1;
-				}
-			}
-		close(us);
-		}
-	if (getpwnam(recp)!=NULL) return(1);
-	if (found_closest_match) return(3);
-	return(0);
-	}
-
-/* strip leading and trailing spaces */
-void striplt(buf)
-char buf[]; {
-	while ( (strlen(buf)>0) && (buf[0]==32) ) strcpy(buf,&buf[1]);
-	while (buf[strlen(buf)-1] == 32) buf[strlen(buf)-1] = 0;
-	}
+	return s;
+}
 
 
 /*
- * Check to see if a given FQDN really maps to a Citadel network node
+ * input binary data from socket
  */
-void host_alias(char host[]) {
-
-	int a;
-
-	/* What name is the local host known by? */
-	/* if (!strucmp(host, config.c_fqdn)) { */
-	if (IsHostLocal(host)) {
-		strcpy(host, config.c_nodename);
-		return;
-		}
-
-	/* Other hosts in the gateway domain? */
-	for (a=0; a<strlen(host); ++a) {
-		if ((host[a]=='.') && (!strucmp(&host[a+1], GW_DOMAIN))) {
-			host[a] = 0;
-			for (a=0; a<strlen(host); ++a) {
-				if (host[a]=='.') host[a] = 0;
-				}
+void serv_read(char *buf, int bytes)
+{
+	int len, rlen;
+
+	len = 0;
+	while (len < bytes) {
+		rlen = read(serv_sock, &buf[len], bytes - len);
+		if (rlen < 1) {
 			return;
-			}
 		}
-
-	/* Otherwise, do nothing... */
+		len = len + rlen;
 	}
-
+}
 
 
 /*
- * Split an RFC822-style address into userid, host, and full name
+ * send binary to server
  */
-void process_rfc822_addr(rfc822,user,node,name)
-char rfc822[];
-char user[];
-char node[];
-char name[];  {
-	int a;
-
-	/* extract full name - first, it's From minus <userid> */
-	strcpy(name,rfc822);
-	for (a=0; a<strlen(name); ++a) if (name[a]=='<') {
-		do {
-			strcpy(&name[a],&name[a+1]);
-			} while ( (strlen(name) > 0) && (name[a]!='>') );
-		strcpy(&name[a],&name[a+1]);
-		}
-
-	/* strip anything to the left of a bang */
-	while ( (strlen(name)>0) && (haschar(name,'!')>0) ) 
-		strcpy(name,&name[1]);
-
-	/* and anything to the right of a @ or % */
-	for (a=0; a<strlen(name); ++a) {
-		if (name[a]=='@') name[a]=0;
-		if (name[a]=='%') name[a]=0;
-		}
-
-	/* but if there are parentheses, that changes the rules... */
-	if ( (haschar(rfc822,'(') == 1) && (haschar(rfc822,')') == 1) ) {
-		strcpy(name,rfc822);
-		while ( (strlen(name) > 0) && (name[0]!='(') ) {
-			strcpy(&name[0],&name[1]);
-			}
-		strcpy(&name[0],&name[1]);
-		for (a=0; a<strlen(name); ++a)
-			 if (name[a]==')') name[a]=0;
-		}
-
-	/* but if there are a set of quotes, that supersedes everything */
-	if (haschar(rfc822,34)==2) {
-		strcpy(name,rfc822);
-		while ( (strlen(name) > 0) && (name[0]!=34) ) {
-			strcpy(&name[0],&name[1]);
-			}
-		strcpy(&name[0],&name[1]);
-		for (a=0; a<strlen(name); ++a)
-			if (name[a]==34) name[a]=0;
-		}
-
-	/* extract user id */
-	strcpy(user,rfc822);
-
-	/* first get rid of anything in parens */
-	for (a=0; a<strlen(user); ++a) if (user[a]=='(') {
-		do {
-			strcpy(&user[a],&user[a+1]);
-			} while ( (strlen(user) > 0) && (user[a]!=')') );
-		strcpy(&user[a],&user[a+1]);
-		}
-
-	/* if there's a set of angle brackets, strip it down to that */
-	if ( (haschar(user,'<') == 1) && (haschar(user,'>') == 1) ) {
-		while ( (strlen(user) > 0) && (user[0]!='<') ) {
-			strcpy(&user[0],&user[1]);
-			}
-		strcpy(&user[0],&user[1]);
-		for (a=0; a<strlen(user); ++a)
-			 if (user[a]=='>') user[a]=0;
-		}
-
-	/* strip anything to the left of a bang */
-	while ( (strlen(user)>0) && (haschar(user,'!')>0) ) 
-		strcpy(user,&user[1]);
-
-	/* and anything to the right of a @ or % */
-	for (a=0; a<strlen(user); ++a) {
-		if (user[a]=='@') user[a]=0;
-		if (user[a]=='%') user[a]=0;
-		}
-
-
-	
-	/* extract node name */
-	strcpy(node, rfc822);
-
-	/* first get rid of anything in parens */
-	for (a=0; a<strlen(node); ++a) if (node[a]=='(') {
-		do {
-			strcpy(&node[a],&node[a+1]);
-			} while ( (strlen(node) > 0) && (node[a]!=')') );
-		strcpy(&node[a],&node[a+1]);
-		}
-
-	/* if there's a set of angle brackets, strip it down to that */
-	if ( (haschar(node,'<') == 1) && (haschar(node,'>') == 1) ) {
-		while ( (strlen(node) > 0) && (node[0]!='<') ) {
-			strcpy(&node[0],&node[1]);
-			}
-		strcpy(&node[0],&node[1]);
-		for (a=0; a<strlen(node); ++a)
-			 if (node[a]=='>') node[a]=0;
+void serv_write(char *buf, int nbytes)
+{
+	int bytes_written = 0;
+	int retval;
+	while (bytes_written < nbytes) {
+		retval = write(serv_sock, &buf[bytes_written],
+			       nbytes - bytes_written);
+		if (retval < 1) {
+			return;
 		}
-
-	/* strip anything to the left of a @ */
-	while ( (strlen(node)>0) && (haschar(node,'@')>0) ) 
-		strcpy(node,&node[1]);
-
-	/* strip anything to the left of a % */
-	while ( (strlen(node)>0) && (haschar(node,'%')>0) ) 
-		strcpy(node,&node[1]);
-
-	/* reduce multiple system bang paths to node!user */
-	while ( (strlen(node)>0) && (haschar(node,'!')>1) ) 
-		strcpy(node,&node[1]);
-
-	/* now get rid of the user portion of a node!user string */
-	for (a=0; a<strlen(node); ++a) if (node[a]=='!') node[a]=0;
-
+		bytes_written = bytes_written + retval;
+	}
+}
 
 
-	/* strip leading and trailing spaces in all strings */
-	striplt(user);
-	striplt(node);
-	striplt(name);
-	}
 
 /*
- * Copy line by line, ending at EOF or a "." 
+ * input string from socket - implemented in terms of serv_read()
  */
-void loopcopy(FILE *to, FILE *from) {
-	char buf[1024];
-	char *r;
-	
-	while (1) {
-		r = fgets(buf, sizeof(buf), from);
-		if (r == NULL) return;
-		strip_trailing_whitespace(buf);
-		if (!strcmp(buf, ".")) return;
-		fprintf(to, "%s\n", buf);
-		}
+void serv_gets(char *buf)
+{
+	int i;
+
+	/* Read one character at a time.
+	 */
+	for (i = 0;; i++) {
+		serv_read(&buf[i], 1);
+		if (buf[i] == '\n' || i == (SIZ-1))
+			break;
 	}
 
+	/* If we got a long line, discard characters until the newline.
+	 */
+	if (i == (SIZ-1))
+		while (buf[i] != '\n')
+			serv_read(&buf[i], 1);
 
-/*
- * pipe message through netproc
- */
-void do_citmail(char recp[], int dtype) {
-
-	long now;
-	FILE *temp;
-	int a;
-	char buf[128];
-	char from[512];
-	char userbuf[256];
-	char frombuf[256];
-	char nodebuf[256];
-	char destsys[256];
-	char subject[256];
-
-
-	if (dtype==REMOTE) {
-
-		/* get the Citadel node name out of the path */
-		strncpy(destsys, recp, sizeof(destsys) );
-		for (a=0; a<strlen(destsys); ++a) {
-			if ((destsys[a]=='!')||(destsys[a]=='.')) {
-				destsys[a]=0;
-				}
-			}
+	/* Strip all trailing nonprintables (crlf)
+	 */
+	buf[i] = 0;
+	strip_trailing_nonprint(buf);
+	if (debug) fprintf(stderr, "> %s\n", buf);
+}
 
-		/* chop the system name out, so we're left with a user */
-		while (haschar(recp,'!')) strcpy(recp,&recp[1]);
 
-		/* now convert underscores to spaces */
-		for (a=0; a<strlen(recp); ++a) if (recp[a]=='_') recp[a]=' ';
+/*
+ * send line to server - implemented in terms of serv_write()
+ */
+void serv_puts(char *buf)
+{
+	if (debug) fprintf(stderr, "< %s\n", buf);
+	serv_write(buf, strlen(buf));
+	serv_write("\n", 1);
+}
 
-		}
 
-	time(&now);
-	sprintf(from, "postmaster@%s", config.c_nodename);
 
-	sprintf(buf, "./network/spoolin/citmail.%d", getpid());
-	temp = fopen(buf,"w");
+void cleanup(int exitcode) {
+	char buf[1024];
 
-	putc(255,temp); putc(MES_NORMAL,temp); putc(1,temp);
-	strcpy(subject,"");
-	strcpy(nodebuf, config.c_nodename);
-	do {
-		if (fgets(buf,128,stdin) == NULL) strcpy(buf, ".");
-		strip_trailing_whitespace(buf);
-
-		if (!strncmp(buf,"Subject: ",9)) strcpy(subject,&buf[9]);
-		if (!strncmp(buf,"Date: ",6)) now = conv_date(&buf[6]);
-		if (!strncmp(buf,"From: ",6)) strcpy(from, &buf[6]);
-		} while ( (strcmp(buf, ".")) && (strcmp(buf, "")) );
-
-	process_rfc822_addr(from, userbuf, nodebuf, frombuf);
-
-	/* now convert it to Citadel format */
-	fprintf(temp,"P%s@%s%c", userbuf, nodebuf, 0);
-	fprintf(temp,"E%s%c", userbuf, 0);
-	fprintf(temp,"T%ld%c", now, 0);
-	fprintf(temp,"A%s%c", frombuf, 0);
-	fprintf(temp,"OMail%c", 0);
-	fprintf(temp,"N%s%c", nodebuf, 0);
-	if (dtype==REMOTE) {
-		fprintf(temp,"D%s%c", destsys, 0);
-		}
-	fprintf(temp,"R%s%c", recp, 0);
-	if (strlen(subject)>0) {
-		fprintf(temp,"U%s%c", subject, 0);
-		}
-	putc('M',temp);
-	if (strcmp(buf, ".")) loopcopy(temp, stdin);
-	putc(0,temp);
-	fclose(temp);
+	if (exitcode != 0) {
+		fprintf(stderr, "citmail: error #%d occurred while sending mail.\n", exitcode);
+		fprintf(stderr, "Please check your Citadel configuration.\n");
 	}
-
-void do_roommail(recp)  /* pipe public message through netproc */
-char recp[]; {
-	long now;
-	FILE *temp;
-	int a;
-	char buf[128],userbuf[128],frombuf[128],nodebuf[128];
-	char subject[128], from[256];
-
-	strcpy(subject,"");
-	sprintf(from, "postmaster@%s", config.c_nodename);
-	strcpy(recp,&recp[5]);
-	for (a=0; a<strlen(recp); ++a) if (recp[a]=='_') recp[a]=32;
-	time(&now);
+	serv_puts("QUIT");
+	serv_gets(buf);
+	exit(exitcode);
+}
 
 
-	sprintf(buf,"./network/spoolin/citmail.%d",getpid());
-	temp = fopen(buf,"w");
 
-	putc(255,temp); putc(MES_NORMAL,temp); putc(1,temp);
-	strcpy(frombuf,"Internet Mail Gateway");
-	strcpy(nodebuf, config.c_nodename);
-	do {
-		if (fgets(buf,128,stdin) == NULL) strcpy(buf, ".");
-		strip_trailing_whitespace(buf);
-
-		if (!strncmp(buf,"Subject: ",9)) strcpy(subject,&buf[9]);
-		if (!strncmp(buf,"Date: ",6)) now = conv_date(&buf[6]);
-		if (!strncmp(buf,"From: ",6)) strcpy(from, &buf[6]);
-		} while ( (strcmp(buf, ".")) && (strcmp(buf, "")) );
-
-	process_rfc822_addr(from, userbuf, nodebuf, frombuf);
-
-	fprintf(temp,"P%s@%s",userbuf,nodebuf);	putc(0,temp);
-	fprintf(temp,"T%ld",now); putc(0,temp);
-	fprintf(temp,"A%s",frombuf); putc(0,temp);
-	fprintf(temp,"O%s",recp); putc(0,temp);
-	fprintf(temp,"N%s",nodebuf); putc(0,temp);
-	if (strlen(subject)>0) {
-		fprintf(temp,"U%s",subject); putc(0,temp);
-		}
-	putc('M',temp);
-	if (strcmp(buf, ".")) loopcopy(temp, stdin);
-	putc(0,temp);
-	fclose(temp);
-	}
-
-void do_uudecode(target)
-char *target;  {
-	static char buf[1024];
+int main(int argc, char **argv) {
+	char buf[1024];
+	char fromline[1024];
 	FILE *fp;
-	
-	sprintf(buf,"cd %s; uudecode",target);
-
-	fp=popen(buf,"w");
-	if (fp==NULL) return;
-	while (fgets(buf,1024,stdin)!=NULL) {
-		fprintf(fp,"%s",buf);
+	int i;
+	struct passwd *pw;
+	int from_header = 0;
+	int in_body = 0;
+	char ctdldir[PATH_MAX]=CTDLDIR;
+	char *sp, *ep;
+	char hostname[256];
+	char **recipients = NULL;
+	int num_recipients = 0;
+	int to_or_cc = 0;
+	int read_recipients_from_headers = 0;
+	char *add_these_recipients = NULL;
+
+	for (i=1; i<argc; ++i) {
+		if (!strcmp(argv[i], "-d")) {
+			debug = 1;
+		}
+		else if (!strcmp(argv[i], "-t")) {
+			read_recipients_from_headers = 1;
+		}
+		else if (!strncmp(argv[i], "-h", 2)) {
+			safestrncpy(ctdldir, &argv[i][2], sizeof ctdldir);
+		}
+		else if (argv[i][0] != '-') {
+			++num_recipients;
+			recipients = realloc(recipients, (num_recipients * sizeof (char *)));
+			recipients[num_recipients - 1] = strdup(argv[i]);
 		}
-	pclose(fp);
-
 	}
 
-void do_fallback(recp)
-char recp[]; {
-	static char buf[1024];
-	FILE *fp;
-	
-	sprintf(buf, FALLBACK, recp);
-	fp=popen(buf,"w");
-	if (fp==NULL) fp = popen("cat >/dev/null", "w");
-	loopcopy(fp, stdin);
-	pclose(fp);
+	if (chdir(ctdldir) != 0) {
+		fprintf(stderr, "sendcommand: %s: %s\n", ctdldir, strerror(errno));
+		exit(errno);
 	}
-
-int alias(name)
-char *name; {
-	FILE *fp;
-	int a;
-	char abuf[256];
-	
-	fp=fopen(ALIASES,"r");
-	if (fp==NULL) {
-		syslog(LOG_ERR,"cannot open %s: %s",ALIASES,strerror(errno));
-		return(2);
-		}
-
-	while (fgets(abuf,256,fp)!=NULL) {
-		strip_trailing_whitespace(abuf);
-		for (a=0; a<strlen(abuf); ++a) {
-			if (abuf[a]==',') {
-				abuf[a]=0;
-				if (!strucmp(name,abuf)) {
-					strcpy(name,&abuf[a+1]);
-					}
-				}
-			}
-		}
-	fclose(fp);
-	return(0);
+	       
+	pw = getpwuid(getuid());
+
+	fp = tmpfile();
+	if (fp == NULL) return(errno);
+	serv_sock = uds_connectsock(file_lmtp_socket);
+	serv_gets(buf);
+	if (buf[0] != '2') {
+		fprintf(stderr, "%s\n", &buf[4]);
+		if (debug) fprintf(stderr, "citmail: could not connect to LMTP socket.\n");
+		cleanup(1);
 	}
 
-
-void deliver(char recp[], int is_test, int deliver_to_ignet) {
-
-	int b;
-	b=islocalok(recp);
-
-	/* various ways we can deliver mail... */
-
-	if (deliver_to_ignet) {
-		syslog(LOG_NOTICE,"to Citadel network user %s",recp);
-		if (is_test == 0) do_citmail(recp, REMOTE);
-		}
-
-	else if (!strcmp(recp,"uudecode")) {
-		syslog(LOG_NOTICE,"uudecoding to bit bucket directory");
-		if (is_test == 0) do_uudecode(config.c_bucket_dir);
-		}
-
-	else if (!strcmp(recp,"cit86net")) {
-		syslog(LOG_NOTICE,"uudecoding to Cit86net spool");
-		if (is_test == 0) {
-			do_uudecode(CIT86NET);
-			system("exec ./BatchTranslate86");
-			}
-		}
-
-	else if (!strcmp(recp,"null")) {
-		syslog(LOG_NOTICE,"zapping nulled message");
-		}
-
-	else if (!struncmp(recp,"room_",5)) {
-		syslog(LOG_NOTICE,"to room %s",recp);
-		if (is_test == 0) do_roommail(recp);
-		}
-
-	else if (b==1) {
-		syslog(LOG_NOTICE,"fallback mailer to user %s",recp);
-		if (is_test == 0) do_fallback(recp);
-		}
-
-	else {
-		/* Otherwise, the user is local (or an unknown name was specified, in
-		 * which case we let netproc handle the bounce)
-		 */
-		syslog(LOG_NOTICE,"to Citadel user %s",recp);
-		if (is_test == 0) do_citmail(recp, LOCAL);
-		}
-
+	sp = strchr (buf, ' ');
+	if (sp == NULL) {
+		if (debug) fprintf(stderr, "citmail: could not calculate hostname.\n");
+		cleanup(2);
 	}
+	sp ++;
+	ep = strchr (sp, ' ');
+	if (ep == NULL) {
+		if (debug) fprintf(stderr, "citmail: error parsing hostname\n");
+		cleanup(3);
+	}
+	else
+		*ep = '\0';
 
+	strncpy(hostname, sp, sizeof hostname);
 
-
-void main(argc,argv)
-int argc;
-char *argv[]; {
-	int is_test = 0;
-	int deliver_to_ignet = 0;
-	int smtp = 0;
-	static char recp[1024], buf[1024];
-	static char user[1024], node[1024], name[1024];
-	int a;
-
-	openlog("citmail", LOG_PID, LOG_USER);
-	get_config();
-	LoadInternetConfig();
-
-	if (!strcmp(argv[1],"-t")) {
-		is_test = 1;
-		syslog(LOG_NOTICE,"test mode - will not deliver");
-		}
-	if (!strcmp(argv[1], "-i")) {
-		smtp = 1;
-		syslog(LOG_NOTICE,"started as an SMTP daemon");
-		}
-
-
-	if (smtp) {
-		strcpy(recp, "");
-		}
-	else if (is_test == 0) {
-		strcpy(recp,argv[1]);
+	snprintf(fromline, sizeof fromline, "From: %s@%s", pw->pw_name, hostname);
+	while (fgets(buf, 1024, stdin) != NULL) {
+		if ( ( (buf[0] == 13) || (buf[0] == 10)) && (in_body == 0) ) {
+			in_body = 1;
+			if (from_header == 0) {
+				fprintf(fp, "%s%s", fromline, buf);
+			}
 		}
-	else {
-		strcpy(recp,argv[2]);
+		if (in_body == 0 && !strncasecmp(buf, "From:", 5)) {
+			strcpy(fromline, buf);
+			from_header = 1;
 		}
 
-
-	if (smtp) {
-		/*** SMTP delivery mode ***/
-
-		printf("200 Citadel/UX SMTP gateway ready.\n");
-	
-		do {
-			fflush(stdout);
-			fflush(stderr);
-			fgets(buf, 1024, stdin);
-			while ( (strlen(buf)>0) && (buf[strlen(buf)-1]>0) && (buf[strlen(buf)-1]<32) ) {
-				buf[strlen(buf)-1] = 0;
-				}
-
-			/* null-pad to allow some lazy compares */
-			buf[strlen(buf)+1] = 0;
-			buf[strlen(buf)+2] = 0;
-			buf[strlen(buf)+3] = 0;
-	
-			if (!struncmp(buf, "QUIT", 4)) {
-				printf("221 Later, dude.\n");
-				}
-			else if (!struncmp(buf, "HELP", 4)) {
-				printf("214 You think _you_ need help?\n");
+		if (read_recipients_from_headers) {
+			add_these_recipients = NULL;
+			if ((isspace(buf[0])) && (to_or_cc)) {
+				add_these_recipients = buf;
+			}
+			else {
+				if ((!strncasecmp(buf, "To:", 3)) || (!strncasecmp(buf, "Cc:", 3))) {
+					to_or_cc = 1;
 				}
-			else if (!struncmp(buf, "HELO", 4)) {
-				printf("250 Howdy ho, Mr. Hankey!\n");
+				else {
+					to_or_cc = 0;
 				}
-			else if (!struncmp(buf, "MAIL", 4)) {
-				printf("250 Sure, whatever...\n");
+				if (to_or_cc) {
+					add_these_recipients = &buf[3];
 				}
+			}
 
-
-			else if (!struncmp(buf, "RCPT To: ", 9)) {
-				if (strlen(recp) > 0) {
-					printf("571 Multiple recipients not supported.\n");
-					}
-				else {
-					strcpy(recp, &buf[9]);
-					if (haschar(recp, ',')) {
-						printf("571 Multiple recipients not supported.\n");
-						strcpy(recp, "");
-						}
-					else {
-						syslog(LOG_NOTICE,"recp: %s",recp);
-						for (a=0; a<2; ++a) {
-							alias(recp);
-							}
-
-						/* did we alias it back to a remote address? */
-						if (	(haschar(recp,'%'))
-	   					||	(haschar(recp,'@'))
-	   					||	(haschar(recp,'!')) ) {
-	
-							process_rfc822_addr(recp, user, node, name);
-							host_alias(node);
-		
-							/* If there are dots, it's an Internet host, so feed it
-		 				 	* back to an external mail transport agent such as sendmail.
-		 				 	*/
-							if (haschar(node, '.')) {
-								printf("571 Away with thee, spammer!\n");
-								strcpy(recp, "");
-								}
-		
-							/* Otherwise, we're dealing with Citadel mail. */
-							else {
-								sprintf(recp, "%s!%s", node, user);
-								deliver_to_ignet = 1;
-								printf("250 IGnet recipient.\n");
-								}
-							}
-						else {
-							printf("250 Local recipient.\n");
-							}
-	
-						}
-	
+			if (add_these_recipients) {
+				int num_recp_on_this_line;
+				char this_recp[256];
+
+				num_recp_on_this_line = num_tokens(add_these_recipients, ',');
+				for (i=0; i<num_recp_on_this_line; ++i) {
+					extract_token(this_recp, add_these_recipients,
+						i, ',', sizeof this_recp);
+					striplt(this_recp);
+					if (!IsEmptyStr(this_recp)) {
+						++num_recipients;
+						recipients = realloc(recipients,
+							(num_recipients * sizeof (char *)));
+						recipients[num_recipients - 1] = strdup(this_recp);
 					}
 				}
+			}
+		}
 
+		fprintf(fp, "%s", buf);
+	}
+	strip_trailing_nonprint(fromline);
 
+	sprintf(buf, "LHLO %s", hostname);
+	serv_puts(buf);
+	do {
+		serv_gets(buf);
+		strcat(buf, "    ");
+	} while (buf[3] == '-');
+	if (buf[0] != '2') {
+		if (debug) fprintf(stderr, "citmail: LHLO command failed\n");
+		cleanup(4);
+	}
 
-			else if (!struncmp(buf, "RCPT", 4)) {
-				printf("501 Only 'To:' commands are supported.\n");
-				}
-			else if (!struncmp(buf, "DATA", 4)) {
-				if (strlen(recp) > 0) {
-					printf("354 Sock it to me, baby...\n");
-					fflush(stdout);
-					deliver(recp, is_test, deliver_to_ignet);
-					printf("250 Cool beans!\n");
-					}
-				else {
-					printf("503 No recipient has been specified.\n");
-					}
-				}
-			else {
-				printf("500 Huh?\n");
-				}
-	
-			} while (struncmp(buf,"QUIT",4));
-		}
+	snprintf(buf, sizeof buf, "MAIL %s", fromline);
+	serv_puts(buf);
+	serv_gets(buf);
+	if (buf[0] != '2') {
+		if (debug) fprintf(stderr, "citmail: MAIL command failed\n");
+		cleanup(5);
+	}
 
+	for (i=0; i<num_recipients; ++i) {
+		snprintf(buf, sizeof buf, "RCPT To: %s", recipients[i]);
+		serv_puts(buf);
+		serv_gets(buf);
+		free(recipients[i]);
+	}
+	free(recipients);
+
+	serv_puts("DATA");
+	serv_gets(buf);
+	if (buf[0]!='3') {
+		if (debug) fprintf(stderr, "citmail: DATA command failed\n");
+		cleanup(6);
+	}
+
+	rewind(fp);
+	while (fgets(buf, sizeof buf, fp) != NULL) {
+		strip_trailing_nonprint(buf);
+		serv_puts(buf);
+	}
+	serv_puts(".");
+	serv_gets(buf);
+	if (buf[0] != '2') {
+		fprintf(stderr, "%s\n", &buf[4]);
+		cleanup(7);
+	}
 	else {
-		/*** Non-SMTP delivery mode ***/
-		syslog(LOG_NOTICE,"recp: %s",recp);
-		for (a=0; a<2; ++a) {
-			alias(recp);
-			}
-	
-		/* did we alias it back to a remote address? */
-		if (	(haschar(recp,'%'))
-	   	||	(haschar(recp,'@'))
-	   	||	(haschar(recp,'!')) ) {
-	
-			process_rfc822_addr(recp, user, node, name);
-			host_alias(node);
-		
-			/* If there are dots, it's an Internet host, so feed it
-		 	* back to an external mail transport agent such as sendmail.
-		 	*/
-			if (haschar(node, '.')) {
-				sprintf(buf, SENDMAIL, recp);
-				system(buf);
-				exit(0);
-				}
-	
-			/* Otherwise, we're dealing with Citadel mail. */
-			else {
-				sprintf(recp, "%s!%s", node, user);
-				deliver_to_ignet = 1;
-				}
-	
-			}
-	
-		deliver(recp, is_test, deliver_to_ignet);
-		}
-	
-	closelog();
-	if (RUN_NETPROC) execlp("./netproc","netproc",NULL);
-	exit(0);
+		cleanup(0);
 	}
 
+	/* We won't actually reach this statement but the compiler will
+	 * display a spurious warning about an invalid return type if
+	 * we don't return an int.
+	 */
+	return(0);
+}