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diff --git a/toys/posix/chmod.c b/toys/posix/chmod.c
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+/* vi: set sw=4 ts=4:
+ *
+ * chmod.c - Change file mode bits
+ *
+ * Copyright 2012 Rob Landley <rob@landley.net>
+ *
+ * See http://pubs.opengroup.org/onlinepubs/009695399/utilities/chmod.html
+ *
+
+USE_CHMOD(NEWTOY(chmod, "<2?vR", TOYFLAG_BIN))
+
+config CHMOD
+    bool "chmod"
+    default y
+    help
+        usage: chmod [-R] MODE FILE...
+
+        Change mode of listed file[s] (recursively with -R).
+
+        MODE can be (comma-separated) stanzas: [ugoa][+-=][rwxstXugo]
+
+        Stanzas are applied in order: For each category (u = user,
+        g = group, o = other, a = all three, if none specified default is a),
+        set (+), clear (-), or copy (=), r = read, w = write, x = execute.
+        s = u+s = suid, g+s = sgid, o+s = sticky. (+t is an alias for o+s).
+        suid/sgid: execute as the user/group who owns the file.
+        sticky: can't delete files you don't own out of this directory
+        X = x for directories or if any category already has x set.
+
+        Or MODE can be an octal value up to 7777	ug uuugggooo	top +
+        bit 1 = o+x, bit 1<<8 = u+w, 1<<11 = g+1	sstrwxrwxrwx	bottom
+
+        Examples:
+        chmod u+w file - allow owner of "file" to write to it.
+        chmod 744 file - user can read/write/execute, everyone else read only
+*/
+
+#include "toys.h"
+
+DEFINE_GLOBALS(
+    char *mode;
+)
+
+#define TT this.chmod
+
+#define FLAG_R 1
+#define FLAG_v 2
+
+int do_chmod(struct dirtree *try)
+{
+    mode_t mode;
+
+    if (!dirtree_notdotdot(try)) return 0;
+
+    mode = string_to_mode(TT.mode, try->st.st_mode);
+    if (toys.optflags & FLAG_v) {
+        char *s = dirtree_path(try, 0);
+        printf("chmod '%s' to %04o\n", s, mode);
+        free(s);
+    }
+    wfchmodat(dirtree_parentfd(try), try->name, mode);
+
+    return (toys.optflags & FLAG_R) ? DIRTREE_RECURSE : 0;
+}
+
+void chmod_main(void)
+{
+    TT.mode = *toys.optargs;
+    char **file;
+
+    for (file = toys.optargs+1; *file; file++) dirtree_read(*file, do_chmod);
+}