1 files changed, 82 insertions, 0 deletions
diff --git a/appl/alphabet/fs/path.b b/appl/alphabet/fs/path.b
new file mode 100644
index 00000000..1ed48378
--- /dev/null
+++ b/appl/alphabet/fs/path.b
@@ -0,0 +1,82 @@
+implement Path, Fsmodule;
+include "sys.m";
+	sys: Sys;
+include "draw.m";
+include "sh.m";
+include "alphabet/reports.m";
+	Report: import Reports;
+include "alphabet/fs.m";
+	fs: Fs;
+	Value: import fs;
+	Fschan, Fsdata, Entrychan, Entry,
+	Gatechan, Gatequery, Nilentry, Option,
+	Next, Down, Skip, Quit: import Fs;
+
+Path: module {};
+
+types(): string
+{
+	return "pss*-x";
+}
+
+badmod(p: string)
+{
+	sys->fprint(sys->fildes(2), "fs: size: cannot load %s: %r\n", p);
+	raise "fail:bad module";
+}
+
+init()
+{
+	sys = load Sys Sys->PATH;
+	fs = load Fs Fs->PATH;
+	if(fs == nil)
+		badmod(Fs->PATH);
+	fs->init();
+}
+
+run(nil: ref Draw->Context, nil: ref Report,
+			opts: list of Option, args: list of ref Value): ref Value
+{
+	# XXX cleanname all paths?
+	c := chan of Gatequery;
+	p: list of string;
+	for(; args != nil; args = tl args)
+		p = (hd args).s().i :: p;
+	spawn pathgate(c, opts != nil, p);
+	return ref Value.Vp(c);
+}
+
+pathgate(c: Gatechan, xflag: int, paths: list of string)
+{
+	if(xflag){
+		while((((d, path, nil), reply) := <-c).t0.t0 != nil){
+			for(q := paths; q != nil; q = tl q){
+				r := 1;
+				p := hd q;
+				if(len path > len p)
+					r = path[len p] != '/' || path[0:len p] != p;
+				else if(len path == len p)
+					r = path != p;
+				if(r == 0)
+					break;
+			}
+			reply <-= q == nil;
+		}
+	}else{
+		while((((d, path, nil), reply) := <-c).t0.t0 != nil){
+			for(q := paths; q != nil; q = tl q){
+				r := 0;
+				p := hd q;
+				if(len path > len p)
+					r = path[len p] == '/' && path[0:len p] == p;
+				else if(len path == len p)
+					r = path == p;
+				else
+					r = p[len path] == '/' && p[0:len path] == path;
+				if(r)
+					break;
+			}
+			reply <-= q != nil;
+		}
+	}
+}