diff --git a/src/cmd/acmeevent.c b/src/cmd/acmeevent.c
new file mode 100644
index 0000000..96e8617
--- /dev/null
+++ b/src/cmd/acmeevent.c
@@ -0,0 +1,93 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+
+
+int
+getn(Biobuf *b)
+{
+	int c, n;
+
+	n = 0;
+	while((c = Bgetc(b)) != -1 && '0'<=c && c<='9')
+		n = n*10+c-'0';
+	if(c != ' ')
+		sysfatal("bad number syntax");
+	return n;
+}
+
+char*
+getrune(Biobuf *b, char *p)
+{
+	int c;
+	char *q;
+
+	c = Bgetc(b);
+	if(c == -1)
+		sysfatal("eof");
+	q = p;
+	*q++ = c;
+	if(c >= Runeself){
+		while(!fullrune(p, q-p)){
+			c = Bgetc(b);
+			if(c == -1)
+				sysfatal("eof");
+			*q++ = c;
+		}
+	}
+	return q;
+}
+
+void
+getevent(Biobuf *b, int *c1, int *c2, int *q0, int *q1, int *flag, int *nr, char *buf)
+{
+	int i;
+	char *p;
+
+	*c1 = Bgetc(b);
+	if(*c1 == -1)
+		exits(0);
+	*c2 = Bgetc(b);
+	*q0 = getn(b);
+	*q1 = getn(b);
+	*flag = getn(b);
+	*nr = getn(b);
+	if(*nr >= 256)
+		sysfatal("event string too long");
+	p = buf;
+	for(i=0; i<*nr; i++)
+		p = getrune(b, p);
+	*p = 0;
+	if(Bgetc(b) != '\n')
+		sysfatal("expected newline");
+}
+
+void
+main(void)
+{
+	int c1, c2, q0, q1, eq0, eq1, flag, nr, x;
+	Biobuf b;
+	char buf[2000], buf2[2000], buf3[2000];
+
+	doquote = needsrcquote;
+	quotefmtinstall();
+	Binit(&b, 0, OREAD);
+	for(;;){
+		getevent(&b, &c1, &c2, &q0, &q1, &flag, &nr, buf);
+		eq0 = q0;
+		eq1 = q1;
+		buf2[0] = 0;
+		buf3[0] = 0;
+		if(flag & 2){
+			/* null string with non-null expansion */
+			getevent(&b, &x, &x, &eq0, &eq1, &x, &nr, buf);
+		}
+		if(flag & 8){
+			/* chorded argument */
+			getevent(&b, &x, &x, &x, &x, &x, &x, buf2);
+			getevent(&b, &x, &x, &x, &x, &x, &x, buf3);
+		}
+		print("event %c %c %d %d %d %d %d %d %q %q %q\n",
+			c1, c2, q0, q1, eq0, eq1, flag, nr, buf, buf2, buf3);
+	}
+}
diff --git a/src/cmd/aescbc.c b/src/cmd/aescbc.c
deleted file mode 100644
index 9f4bfff..0000000
--- a/src/cmd/aescbc.c
+++ /dev/null
@@ -1,144 +0,0 @@
-/* encrypt file by writing
-	v2hdr,
-	16byte initialization vector,
-	AES-CBC(key, random | file),
-    HMAC_SHA1(md5(key), AES-CBC(random | file))
-
-With CBC, if the first plaintext block is 0, the first ciphertext block is
-E(IV).  Using the overflow technique adopted for compatibility with cryptolib
-makes the last cipertext block decryptable.  Hence the random prefix to file.
-*/
-#include <u.h>
-#include <libc.h>
-#include <bio.h>
-#include <mp.h>
-#include <libsec.h>
-
-enum{ CHK = 16, BUF = 4096 };
-
-uchar v2hdr[AESbsize+1] = "AES CBC SHA1  2\n";
-Biobuf bin;
-Biobuf bout;
-
-void
-safewrite(uchar *buf, int n)
-{
-	int i = Bwrite(&bout, buf, n);
-
-	if(i == n)
-		return;
-	fprint(2, "write error\n");
-	exits("write error");
-}
-
-void
-saferead(uchar *buf, int n)
-{
-	int i = Bread(&bin, buf, n);
-
-	if(i == n)
-		return;
-	fprint(2, "read error\n");
-	exits("read error");
-}
-
-int
-main(int argc, char **argv)
-{
-	int encrypt = 0;  /* 0=decrypt, 1=encrypt */
-	int n, nkey;
-	char *hex, *msg = nil;
-	uchar key[AESmaxkey], key2[MD5dlen];
-	uchar buf[BUF+SHA1dlen];    /* assumption: CHK <= SHA1dlen */
-	AESstate aes;
-	DigestState *dstate;
-
-	if(argc!=2 || argv[1][0]!='-'){
-		fprint(2,"usage: HEX=key %s -d < cipher.aes > clear.txt\n", argv[0]);
-		fprint(2,"   or: HEX=key %s -e < clear.txt > cipher.aes\n", argv[0]);
-		exits("usage");
-	}
-	if(argv[1][1] == 'e')
-		encrypt = 1;
-	Binit(&bin, 0, OREAD);
-	Binit(&bout, 1, OWRITE);
-
-	if((hex = getenv("HEX")) == nil)
-		hex = getpass("enter key: ");
-	nkey = 0;
-	if(hex != nil)
-		nkey = strlen(hex);
-	if(nkey == 0 || (nkey&1) || nkey>2*AESmaxkey){
-		fprint(2,"key should be 32 hex digits\n");
-		exits("key");
-	}
-	nkey = dec16(key, sizeof key, hex, nkey);
-	md5(key, nkey, key2, 0);  /* so even if HMAC_SHA1 is broken, encryption key is protected */
-
-	if(encrypt){
-		safewrite(v2hdr, AESbsize);
-		genrandom(buf,2*AESbsize); /* CBC is semantically secure if IV is unpredictable. */
-		setupAESstate(&aes, key, nkey, buf);  /* use first AESbsize bytes as IV */
-		aesCBCencrypt(buf+AESbsize, AESbsize, &aes);  /* use second AESbsize bytes as initial plaintext */
-		safewrite(buf, 2*AESbsize);
-		dstate = hmac_sha1(buf+AESbsize, AESbsize, key2, MD5dlen, 0, 0);
-		while(1){
-			n = Bread(&bin, buf, BUF);
-			if(n < 0){
-				msg = "read error";
-				goto Exit;
-			}
-			aesCBCencrypt(buf, n, &aes);
-			safewrite(buf, n);
-			dstate = hmac_sha1(buf, n, key2, MD5dlen, 0, dstate);
-			if(n < BUF)
-				break; /* EOF */
-		}
-		hmac_sha1(0, 0, key2, MD5dlen, buf, dstate);
-		safewrite(buf, SHA1dlen);
-	}else{ /* decrypt */
-		Bread(&bin, buf, AESbsize);
-		if(memcmp(buf, v2hdr, AESbsize) == 0){
-			saferead(buf, 2*AESbsize);  /* read IV and random initial plaintext */
-			setupAESstate(&aes, key, nkey, buf);
-			dstate = hmac_sha1(buf+AESbsize, AESbsize, key2, MD5dlen, 0, 0);
-			aesCBCdecrypt(buf+AESbsize, AESbsize, &aes);
-			saferead(buf, SHA1dlen);
-			while((n = Bread(&bin, buf+SHA1dlen, BUF)) > 0){
-				dstate = hmac_sha1(buf, n, key2, MD5dlen, 0, dstate);
-				aesCBCdecrypt(buf, n, &aes);
-				safewrite(buf, n);
-				memmove(buf, buf+n, SHA1dlen);  /* these bytes are not yet decrypted */
-			}
-			hmac_sha1(0, 0, key2, MD5dlen, buf+SHA1dlen, dstate);
-			if(memcmp(buf, buf+SHA1dlen, SHA1dlen) != 0){
-				msg = "decrypted file failed to authenticate!";
-				goto Exit;
-			}
-		}else{ /* compatibility with past mistake */
-			// if file was encrypted with bad aescbc use this:
-			//         memset(key, 0, AESmaxkey);
-			//    else assume we're decrypting secstore files
-			setupAESstate(&aes, key, 0, buf);
-			saferead(buf, CHK);
-			aesCBCdecrypt(buf, CHK, &aes);
-			while((n = Bread(&bin, buf+CHK, BUF)) > 0){
-				aesCBCdecrypt(buf+CHK, n, &aes);
-				safewrite(buf, n);
-				memmove(buf, buf+n, CHK);
-			}
-			if(memcmp(buf, "XXXXXXXXXXXXXXXX", CHK) != 0){
-				msg = "decrypted file failed to authenticate";
-				goto Exit;
-			}
-		}
-	}
- Exit:
-	memset(key, 0, sizeof(key));
-	memset(key2, 0, sizeof(key2));
-	memset(buf, 0, sizeof(buf));
-	if(msg != nil)
-		fprint(2, "%s\n", msg);
-	exits(msg);
-	return 1;	/* gcc */
-}
diff --git a/src/cmd/delatex.lx b/src/cmd/delatex.lx
new file mode 100644
index 0000000..063aa7d
--- /dev/null
+++ b/src/cmd/delatex.lx
@@ -0,0 +1,64 @@
+/* Make this with:  lex delatex.lex;  cc lex.yy.c -ll -o delatex */
+L [A-Za-z]
+%Start Display Math Normal Tag
+%%
+<Normal>\'	{yyleng--; yymore(); /* ignore apostrophes */}
+<Normal>{L}+\\- {yyleng-=2; yymore(); /* ignore hyphens */}
+<Normal>[a-z]/[^A-Za-z] ; /* ignore single letter "words" */
+<Normal>[A-Z]+	; /* ignore words all in uppercase */
+<Normal>{L}+('{L}*)*{L}	{printf("%s\n",yytext); /* any other letter seq is a word */} 
+<Normal>"%".*	; /* ignore comments */
+<Normal>\\{L}+	; /* ignore other control sequences */
+<Normal>"\\begin{"	BEGIN Tag; /* ignore this and up to next "}" */
+<Normal>"\\bibitem{"	BEGIN Tag;
+<Normal>"\\bibliography{"	BEGIN Tag;
+<Normal>"\\bibstyle{"	BEGIN Tag;
+<Normal>"\\cite{"	BEGIN Tag;
+<Normal>"\\end{"		BEGIN Tag;
+<Normal>"\\include{"	BEGIN Tag;
+<Normal>"\\includeonly{"	BEGIN Tag;
+<Normal>"\\input{"	BEGIN Tag;
+<Normal>"\\label{"	BEGIN Tag;
+<Normal>"\\pageref{"	BEGIN Tag;
+<Normal>"\\ref{"		BEGIN Tag;
+<Tag>[^}]		; /* ignore things up to next "}" */
+<Tag>"}"		BEGIN Normal;
+<Normal>[0-9]+	; /* ignore numbers */
+<Normal>"\\("		BEGIN Math; /* begin latex math mode */
+<Math>"\\)"		BEGIN Normal; /* end latex math mode */
+<Math>.|\\[^)]|\n	; /* ignore anything else in latex math mode */
+<Normal>"\\["		BEGIN Display; /* now in Latex display mode */
+<Display>[^$]|\\[^\]]	; /* ignore most things in display math mode */
+<Display>"\\]"	BEGIN Normal; /* get out of Display math mode */
+<Normal>\\.	; /* ignore other single character control sequences */
+<Normal>\\\n	; /* more of the same */
+<Normal>\n|.	; /* ignore anything else, a character at a time */
+%%
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+main(int argc, char **argv)
+{
+	int i;
+	
+	BEGIN Normal; /* Starts yylex off in the right state */
+	if (argc==1) {
+	    yyin = stdin;
+	    yylex();
+	    }
+	else for (i=1; i<argc; i++) {
+	    yyin = fopen(argv[i],"r");
+	    if (yyin==NULL) {
+		fprintf(stderr,"can't open %s\n",argv[i]);
+		exit(1);
+		}
+	    yylex();
+	    }
+	exit(0);
+}
+int
+yywrap(void)
+{
+	return 1;
+}
diff --git a/src/cmd/dial.c b/src/cmd/dial.c
new file mode 100644
index 0000000..c2b18f5
--- /dev/null
+++ b/src/cmd/dial.c
@@ -0,0 +1,62 @@
+#include <u.h>
+#include <libc.h>
+
+void
+usage(void)
+{
+	fprint(2, "usage: dial [-e] addr\n");
+	exits("usage");
+}
+
+void
+killer(void *x, char *msg)
+{
+	USED(x);
+	if(strcmp(msg, "kill") == 0)
+		exits(0);
+	noted(NDFLT);
+}
+
+void
+main(int argc, char **argv)
+{
+	int fd, pid;
+	char buf[8192];
+	int n, waitforeof;
+
+	notify(killer);
+	waitforeof = 0;
+	ARGBEGIN{
+	case 'e':
+		waitforeof = 1;
+		break;
+	default:
+		usage();
+	}ARGEND
+
+	if(argc != 1)
+		usage();
+
+	if((fd = dial(argv[0], nil, nil, nil)) < 0)
+		sysfatal("dial: %r");
+
+	switch(pid = fork()){
+	case -1:
+		sysfatal("fork: %r");
+	case 0:
+		while((n = read(0, buf, sizeof buf)) > 0)
+			if(write(0, buf, n) < 0)
+				break;
+		if(!waitforeof)
+			postnote(PNPROC, getppid(), "kill");
+		exits(nil);
+	}
+
+	while((n = read(fd, buf, sizeof buf)) > 0)
+		if(write(1, buf, n) < 0)
+			break;
+
+	postnote(PNPROC, pid, "kill");
+	waitpid();
+	exits(0);
+}
diff --git a/src/cmd/read.c b/src/cmd/read.c
new file mode 100644
index 0000000..56d8013
--- /dev/null
+++ b/src/cmd/read.c
@@ -0,0 +1,91 @@
+#include <u.h>
+#include <libc.h>
+
+int	multi;
+int	nlines;
+char	*status = nil;
+
+int
+line(int fd, char *file)
+{
+	char c;
+	int m, n, nalloc;
+	char *buf;
+
+	nalloc = 0;
+	buf = nil;
+	for(m=0; ; ){
+		n = read(fd, &c, 1);
+		if(n < 0){
+			fprint(2, "read: error reading %s: %r\n", file);
+			exits("read error");
+		}
+		if(n == 0){
+			if(m == 0)
+				status = "eof";
+			break;
+		}
+		if(m == nalloc){
+			nalloc += 1024;
+			buf = realloc(buf, nalloc);
+			if(buf == nil){
+				fprint(2, "read: malloc error: %r\n");
+				exits("malloc");
+			}
+		}
+		buf[m++] = c;
+		if(c == '\n')
+			break;
+	}
+	if(m > 0)
+		write(1, buf, m);
+	free(buf);
+	return m;
+}
+
+void
+lines(int fd, char *file)
+{
+	do{
+		if(line(fd, file) == 0)
+			break;
+	}while(multi || --nlines>0);
+}
+
+void
+main(int argc, char *argv[])
+{
+	int i, fd;
+	char *s;
+
+	ARGBEGIN{
+	case 'm':
+		multi = 1;
+		break;
+	case 'n':
+		s = ARGF();
+		if(s){
+			nlines = atoi(s);
+			break;
+		}
+		/* fall through */
+	default:
+		fprint(2, "usage: read [-m] [-n nlines] [files...]\n");
+		exits("usage");
+	}ARGEND
+
+	if(argc == 0)
+		lines(0, "<stdin>");
+	else
+		for(i=0; i<argc; i++){
+			fd = open(argv[i], OREAD);
+			if(fd < 0){
+				fprint(2, "read: can't open %s: %r\n", argv[i]);
+				exits("open");
+			}
+			lines(fd, argv[i]);
+			close(fd);
+		}
+
+	exits(status);
+}