1 files changed, 37 insertions, 11 deletions

diff --git a/appl/cmd/sh/sh.y b/appl/cmd/sh/sh.y
index 083357c1..44984a1b 100644
--- a/appl/cmd/sh/sh.y
+++ b/appl/cmd/sh/sh.y
@@ -319,7 +319,7 @@ runscript(ctxt: ref Context, path: string, args: list of ref Listnode, reporterr
 			runfile(ctxt, fd, path, args);
 		else if (reporterr)
 			ctxt.fail("bad script path", sys->sprint("sh: cannot open %s: %r", path));
-	} exception e {
+	} exception {
 	"fail:*" =>
 		if(!reporterr)
 			return;
@@ -375,7 +375,7 @@ runfile(ctxt: ref Context, fd: ref Sys->FD, path: string, args: list of ref List
 			raise "fail:" + laststatus;
 		ctxt.pop();
 	}
-	exception e {
+	exception {
 	"fail:*" =>
 		ctxt.pop();
 		raise;
@@ -569,6 +569,28 @@ listjoin(left, right: list of ref Listnode): list of ref Listnode
 	return right;
 }
 
+pipecmd(ctxt: ref Context, cmd: list of ref Listnode, redir: ref Redir): ref Sys->FD
+{
+	if(redir.fd2 != -1 || (redir.rtype & OAPPEND))
+		ctxt.fail("bad redir", "sh: bad redirection");
+	r := *redir;
+	case redir.rtype {
+	Sys->OREAD =>
+		r.rtype = Sys->OWRITE;
+	Sys->OWRITE =>
+		r.rtype = Sys->OREAD;
+	}
+			
+	p := array[2] of ref Sys->FD;
+	if(sys->pipe(p) == -1)
+		ctxt.fail("no pipe", sys->sprint("sh: cannot make pipe: %r"));
+	startchan := chan of (int, ref Expropagate);
+	spawn runasync(ctxt, 1, cmd, ref Redirlist((p[1], nil, r) :: nil), startchan);
+	p[1] = nil;
+	<-startchan;
+	return p[0];
+}
+
 glomoperation(ctxt: ref Context, n: ref Node, redirs: ref Redirlist): list of ref Listnode
 {
 	if (n == nil)
@@ -580,11 +602,15 @@ glomoperation(ctxt: ref Context, n: ref Node, redirs: ref Redirlist): list of re
 		nlist = ref Listnode(nil, n.word) :: nil;
 	n_REDIR =>
 		wlist := glob(glom(ctxt, n.left, ref Redirlist(nil), nil));
-		if (len wlist != 1 || (hd wlist).word == nil)
+		if (len wlist != 1)
 			ctxt.fail("bad redir", "sh: single redirection operand required");
-
-		# add to redir list
-		redirs.r = Redirword(nil, (hd wlist).word, *n.redir) :: redirs.r;
+		if((hd wlist).cmd != nil){
+			fd := pipecmd(ctxt, wlist, n.redir);
+			redirs.r = Redirword(fd, nil, (n.redir.rtype, fd.fd, -1)) :: redirs.r;
+			nlist = ref Listnode(nil, "/fd/"+string fd.fd) :: nil;
+		}else{
+			redirs.r = Redirword(nil, (hd wlist).word, *n.redir) :: redirs.r;
+		}
 	n_DUP =>
 		redirs.r = Redirword(nil, "", *n.redir) :: redirs.r;
 	n_LIST =>
@@ -938,7 +964,7 @@ runblock(ctxt: ref Context, args: list of ref Listnode, last: int): string
 		status := walk(ctxt, cmd, last);
 		ctxt.pop();
 		return status;
-	} exception e{
+	} exception {
 	"fail:*" =>
 		ctxt.pop();
 		raise;
@@ -950,7 +976,7 @@ runblock(ctxt: ref Context, args: list of ref Listnode, last: int): string
 trybuiltin(ctxt: ref Context, args: list of ref Listnode, lseq: int)
 		: (int, string)
 {
-	(n, bmods) := findbuiltin(ctxt.env.builtins, (hd args).word);
+	(nil, bmods) := findbuiltin(ctxt.env.builtins, (hd args).word);
 	if (bmods == nil)
 		return (0, nil);
 	return (1, (hd bmods)->runbuiltin(ctxt, myself, args, lseq));
@@ -976,7 +1002,7 @@ externalexec(mod: Command,
 	{
 		mod->init(drawcontext, argv);
 	}
-	exception e{
+	exception {
 	EPIPE =>
 		raise "fail:" + EPIPE;
 	}
@@ -1626,6 +1652,8 @@ patquote(word: string): string
 			i++;
 			if (i >= len word)
 				return outword;
+			if(word[i] == '[' && i < len word - 1 && word[i+1] == '~')
+				word[i+1] = '^';
 		}
 		outword[len outword] = word[i];
 	}
@@ -1987,10 +2015,8 @@ builtin_load(ctxt: ref Context, args: list of ref Listnode, nil: int): string
 	if (tl args == nil || (hd tl args).word == nil)
 		builtinusage(ctxt, "load path...");
 	args = tl args;
-	path := (hd args).word;
 	if (args == nil)
 		builtinusage(ctxt, "load path...");
-	status := "";
 	for (; args != nil; args = tl args) {
 		s := loadmodule(ctxt, (hd args).word);
 		if (s != nil)