Import sources from 2011-03-30 iso image

sys/src/cmd/unmount.c

@@ -0,0 +1,32 @@
+#include <u.h>
+#include <libc.h>
+
+void
+main(int argc, char *argv[])
+{
+	int r;
+	char *mnted, *mtpt;
+
+	argv0 = argv[0];
+	switch (argc) {
+	case 2:
+		mnted = nil;
+		mtpt = argv[1];
+		break;
+	case 3:
+		mnted = argv[1];
+		mtpt = argv[2];
+		break;
+	default:
+		SET(mnted, mtpt);
+		fprint(2, "usage: unmount mountpoint\n");
+		fprint(2, "       unmount mounted mountpoint\n");
+		exits("usage");
+	}
+
+	/* unmount takes arguments in the same order as mount */
+	r = unmount(mnted, mtpt);
+	if(r < 0)
+		sysfatal("%s: %r", mtpt);
+	exits(0);
+}