Cross platform get_info

Signed-off-by: junxiang Mu <1948535941@qq.com>
2026-08-20 19:42:17 +00:00 · 2024-10-22 14:31:28 +08:00
parent 9ff243a7a9
commit 49593dd77d
12 changed files with 281 additions and 10 deletions
@@ -0,0 +1,77 @@
+use crate::disk::Info;
+use nix::sys::{statfs::statfs, stat::stat};
+use std::io::{Error, ErrorKind};
+use std::path::Path;
+
+/// returns total and free bytes available in a directory, e.g. `/`.
+pub fn get_info(p: impl AsRef<Path>) -> std::io::Result<Info> {
+    let stat = statfs(p.as_ref())?;
+
+    let bsize = stat.block_size() as u64;
+    let bfree = stat.blocks_free() as u64;
+    let bavail = stat.blocks_available() as u64;
+    let blocks = stat.blocks() as u64;
+
+    let reserved = match bfree.checked_sub(bavail) {
+        Some(reserved) => reserved,
+        None => {
+            return Err(Error::new(
+                ErrorKind::Other,
+                format!(
+                    "detected f_bavail space ({}) > f_bfree space ({}), fs corruption at ({}). please run 'fsck'",
+                    bavail,
+                    bfree,
+                    p.as_ref().display()
+                ),
+            ))
+        }
+    };
+
+    let total = match blocks.checked_sub(reserved) {
+        Some(total) => total * bsize,
+        None => {
+            return Err(Error::new(
+                ErrorKind::Other,
+                format!(
+                    "detected reserved space ({}) > blocks space ({}), fs corruption at ({}). please run 'fsck'",
+                    reserved,
+                    blocks,
+                    p.as_ref().display()
+                ),
+            ))
+        }
+    };
+
+    let free = bavail * bsize;
+    let used = match total.checked_sub(free) {
+        Some(used) => used,
+        None => {
+            return Err(Error::new(
+                ErrorKind::Other,
+                format!(
+                    "detected free space ({}) > total drive space ({}), fs corruption at ({}). please run 'fsck'",
+                    free,
+                    total,
+                    p.as_ref().display()
+                ),
+            ))
+        }
+    };
+
+    Ok(Info {
+        total,
+        free,
+        used,
+        files: stat.files(),
+        ffree: stat.files_free(),
+        fstype: stat.filesystem_type_name().to_string(),
+        ..Default::default()
+    })
+}
+
+pub fn same_disk(disk1: &str, disk2: &str) -> Result<bool> {
+    let stat1 = stat(disk1)?;
+    let stat2 = stat(disk2)?;
+
+    Ok(stat1.st_dev == stat2.st_dev)
+}