commit da3eabaf8f3b95eb0545a7564e0b1141cadc3f51
Author: Arne Keller <arne.keller@posteo.de>
Date:   Fri Mar 26 11:24:43 2021 +0100

    Initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..0bcd358
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,69 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ascii_table"
+version = "3.0.2"
+source = "git+https://gitlab.com/arnekeller/ascii-table.git?rev=7fffb5d93b8c63283fc1359ee3c6dbfcf12ed90b#7fffb5d93b8c63283fc1359ee3c6dbfcf12ed90b"
+
+[[package]]
+name = "byteorder"
+version = "1.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
+
+[[package]]
+name = "df"
+version = "0.1.0"
+dependencies = [
+ "ascii_table",
+ "libc",
+ "procinfo",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.91"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8916b1f6ca17130ec6568feccee27c156ad12037880833a3b842a823236502e7"
+
+[[package]]
+name = "nom"
+version = "2.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf51a729ecf40266a2368ad335a5fdde43471f545a967109cd62146ecf8b66ff"
+
+[[package]]
+name = "procinfo"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ab1427f3d2635891f842892dda177883dca0639e05fe66796a62c9d2f23b49c"
+dependencies = [
+ "byteorder",
+ "libc",
+ "nom",
+ "rustc_version",
+]
+
+[[package]]
+name = "rustc_version"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
+dependencies = [
+ "semver",
+]
+
+[[package]]
+name = "semver"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
+dependencies = [
+ "semver-parser",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..a073de5
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "df"
+version = "0.1.0"
+authors = ["Arne Keller <arne.keller@posteo.de>"]
+license = "GPL-3.0-or-later"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+ascii_table = { git = "https://gitlab.com/arnekeller/ascii-table.git", rev = "7fffb5d93b8c63283fc1359ee3c6dbfcf12ed90b" }
+libc = "0.2.91"
+procinfo = "0.4.2"
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..5c45697
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,91 @@
+use libc::{c_char, statvfs64, strerror_r};
+use procinfo::pid::mountinfo_self;
+use ascii_table::{Align, AsciiTable, Column};
+
+use std::{array::IntoIter, ffi::CString, fs, mem::MaybeUninit};
+use std::os::unix::ffi::OsStrExt;
+
+const IGNORED_FS: &'static [&'static str] = &["proc", "sysfs", "securityfs", "bpf", "cgroup", "cgroup2", "fusectl", "efivarfs", "debugfs"];
+const IGNORED_FS2: &'static [(&'static str, &'static str)] = &[];//("fuse", "portal")];
+
+fn main() {
+	let mut rows = Vec::new();
+	let mut devices = Vec::new();
+	for mount in mountinfo_self().unwrap() {
+		if IGNORED_FS.contains(&&*mount.fs_type.0) {
+			continue;
+		}
+		if let Some(second) = mount.fs_type.1.as_ref() {
+			if IGNORED_FS2.contains(&(&mount.fs_type.0, second)) {
+				continue;
+			}
+		}
+		// skip multiple FS on the same partition
+		let device = (mount.major, mount.minor);
+		if devices.contains(&device) {
+			continue;
+		}
+		devices.push(device);
+		let mut data = MaybeUninit::<statvfs64>::uninit();
+		let path = CString::new(mount.mount_point.as_os_str().as_bytes()).unwrap();
+		let mut res = unsafe { statvfs64(path.as_ptr(), data.as_mut_ptr()) };
+		if res != 0 {
+			if res < 0 {
+				res = unsafe { *libc::__errno_location() };
+			}
+			let mut error_buffer = vec![0 as c_char; 256];
+			let error: String = unsafe {
+				let result = strerror_r(res, error_buffer.as_mut_ptr(), error_buffer.len());
+				if result != 0 {
+					eprintln!("fail {}", result);
+					res.to_string().into()
+				} else {
+					error_buffer.into_iter().take_while(|&x| x != 0).map(|x| x as u8 as char).collect()
+				}
+			};
+			eprintln!("df: {}: {}", mount.mount_point.display(), error);
+			continue;
+		}
+		let data = unsafe { data.assume_init() };
+		if data.f_blocks == 0 {
+			continue; // metadata is useless
+		}
+
+		let typ = match mount.mount_src.as_deref() {
+			Some(path) if path.starts_with('/') => {
+				fs::canonicalize(path).unwrap().display().to_string()
+			},
+			_ => mount.fs_type.0
+		};
+		rows.push((typ, data.f_blocks, data.f_bfree, mount.mount_point));
+	}
+	let mut ascii_table = AsciiTable::default();
+	ascii_table.draw_lines = false;
+
+	for (i, &(header, align)) in [
+		("Filesystem", Align::Left),
+		("Blocks", Align::Right),
+		("Used", Align::Right),
+		("Free", Align::Right),
+		("Use%", Align::Right),
+		("Mounted on", Align::Left)
+	].iter().enumerate() {
+		let mut column = Column::default();
+		column.header = header.to_owned();
+		column.align = align;
+		ascii_table.columns.insert(i, column);
+	}
+
+	ascii_table.print(rows.into_iter().map(
+		|(typ, blocks, free, path)| IntoIter::new(
+			[
+				typ,
+				blocks.to_string(),
+				(blocks-free).to_string(),
+				free.to_string(),
+				format!("{:.0}%", ((blocks-free) as f64 * 100.0 / blocks as f64).ceil()),
+				path.display().to_string()
+			]
+		)
+	));
+}