diff --git a/Makefile b/Makefile
index 6e92fd9..98e2c9f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-# Copyright (c) 2023–2024 Emma Tebibyte <emma@tebibyte.media>
+# Copyright (c) 2023–2025 Emma Tebibyte <emma@tebibyte.media>
 # Copyright (c) 2023–2024 DTB <trinity@trinity.moe>
 # Copyright (c) 2023 Sasha Koshka <sashakoshka@tebibyte.media>
 # Copyright (c) 2024 Aaditya Aryal <aryalaadi123@gmail.com>
@@ -42,7 +42,7 @@ BIN = build/bin
 default: all test
 
 .PHONY: all
-all: dj false fop hru intcmp mm npc peek rpn scrut str strcmp swab true
+all: dj false fileis fop hru intcmp mm npc peek rpn str strcmp swab true
 
 # keep build/include until bindgen(1) has stdin support
 # https://github.com/rust-lang/rust-bindgen/issues/2703
@@ -112,6 +112,11 @@ false: build/bin/false
 build/bin/false: src/false.c build
 	$(CC) $(CFLAGS) -o $@ src/false.c
 
+.PHONY: fileis
+fileis: build/bin/fileis
+build/bin/fileis: src/fileis.rs build
+	$(RUSTC) $(RUSTFLAGS) $(RUSTLIBS) -o $@ src/fileis.rs
+
 .PHONY: fop
 fop: build/bin/fop
 build/bin/fop: src/fop.rs build rustlibs
@@ -147,11 +152,6 @@ rpn: build/bin/rpn
 build/bin/rpn: src/rpn.rs build rustlibs
 	$(RUSTC) $(RUSTFLAGS) -o $@ src/rpn.rs
 
-.PHONY: scrut
-scrut: build/bin/scrut
-build/bin/scrut: src/scrut.c build
-	$(CC) $(CFLAGS) -o $@ src/scrut.c
-
 .PHONY: str
 str: build/bin/str
 build/bin/str: src/str.c build
diff --git a/docs/scrut.1 b/docs/fileis.1
similarity index 92%
rename from docs/scrut.1
rename to docs/fileis.1
index 2b95bee..9650f73 100644
--- a/docs/scrut.1
+++ b/docs/fileis.1
@@ -1,15 +1,15 @@
 .\" Copyright (c) 2024 DTB <trinity@trinity.moe>
-.\" Copyright (c) 2024 Emma Tebibyte <emma@tebibyte.media>
+.\" Copyright (c) 2024–2025 Emma Tebibyte <emma@tebibyte.media>
 .\"
 .\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
 .\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
 .\"
-.TH SCRUT 1 2024-06-06 "Harakit X.X.X"
+.TH FILEIS 1 2025-02-24 "Harakit X.X.X"
 .SH NAME
-scrut \(en scrutinize file properties
+fileis \(en scrutinize file properties
 .SH SYNOPSIS
 
-scrut
+fileis
 .RB [ -LSbcdefgkprsuwx ]
 .B file...
 .\"
@@ -82,5 +82,6 @@ Copyright \(co 2024 DTB. License AGPLv3+: GNU AGPL version 3 or later
 .\"
 .SH SEE ALSO
 .BR access (3p),
+.BR chown (1p),
 .BR lstat (3p),
 .BR test (1p)
diff --git a/src/fileis.rs b/src/fileis.rs
new file mode 100644
index 0000000..b81b624
--- /dev/null
+++ b/src/fileis.rs
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2024 DTB <trinity@trinity.moe>
+ * Copyright (c) 2024 Emma Tebibyte <emma@tebibyte.media>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Affero General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option) any
+ * later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see https://www.gnu.org/licenses/.
+ */
+
+use std::{
+	env::args,
+	fs::metadata,
+	os::unix::fs::{ FileTypeExt, MetadataExt },
+	process::ExitCode,
+};
+
+extern crate getopt;
+extern crate strerror;
+extern crate sysexits;
+
+use getopt::GetOpt;
+use strerror::StrError;
+use sysexits::EX_USAGE;
+
+const OPTS: &str = "bcdefgkprsuwxLS";
+
+fn usage(argv0: &str) -> ExitCode {
+	eprintln!("Usage: {} [-{}] file...", argv0, OPTS);
+	ExitCode::from(EX_USAGE)
+}
+
+fn main() -> ExitCode {
+	let argv = args().collect::<Vec<_>>();
+
+	let mut sel = String::with_capacity(OPTS.len()); // selected options
+	let mut optind: usize = 1; // argv[0]
+
+	while let Some(opt) = argv.getopt(OPTS) {
+		if let Ok(optchr) = opt.opt() { sel.push_str(optchr); }
+		else { return usage(&argv[0]); }
+
+		optind = opt.ind();
+	}
+
+	if optind == argv.len() { return usage(&argv[0]); }
+
+	for arg in argv.iter().skip(optind) {
+		let fmeta = match metadata(arg) {
+			Ok(m) => m,
+			Err(e) => { // no perms or nonexistent
+				eprintln!("{}: {}: {}", argv[0], arg, e.strerror());
+				return ExitCode::FAILURE;
+			},
+		};
+
+		let fmode = fmeta.mode();
+		let ftype = fmeta.file_type();
+
+		for selection in sel.chars() { // run all selected tests
+			match selection {
+				'b' if ftype.is_block_device() => (),
+				'c' if ftype.is_char_device() => (),
+				'e' => (), // exists or metadata would have errored
+				'd' if fmeta.is_dir() => (),
+				'f' if fmeta.is_file() => (),
+				'g' if fmode & 0o2000 /* S_ISGID */ != 0 => (), // setgid
+				'k' if fmode & 0o1000 /* S_ISVTX */ != 0 => (), // setvtx
+				'p' if ftype.is_fifo() => (),
+				'r' if fmode & 0o0400 /* S_IRUSR */ != 0 => (), // read access
+				'u' if fmode & 0o4000 /* S_ISUID */ != 0 => (), // setuid
+				'w' if fmode & 0o0200 /* S_IWUSR */ != 0 => (), // write access
+				'x' if fmode & 0o0100 /* S_IXUSR */ != 0 => (), // exec access
+				'L' if fmeta.is_symlink() => (),
+				'S' if ftype.is_socket() => (),
+				_ => { return ExitCode::FAILURE; }
+			}
+		}
+	}
+
+	ExitCode::SUCCESS
+}