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Fix overflow error on WSL. Default to 0 when the values are non-sense.

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This commit is contained in:
Howard Su 2023-10-09 09:38:06 +08:00
parent 91c8724fd5
commit d2cacdfce2
1 changed files with 35 additions and 2 deletions
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37
src/uu/df/src/table.rs
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@ -152,8 +152,10 @@ impl From<Filesystem> for Row {
ffree,
..
} = fs.usage;
let bused = blocks - bfree;
let fused = files - ffree;
// On Windows WSL, files can be less than ffree. Protect such cases via saturating_sub.
let bused = blocks.saturating_sub(bfree);
let fused = files.saturating_sub(ffree);
Self {
file: fs.file,
fs_device: dev_name,
@ -815,4 +817,35 @@ mod tests {
assert_eq!(get_formatted_values(1000, 1000, 0), vec!("1", "1", "0"));
assert_eq!(get_formatted_values(1001, 1000, 1), vec!("2", "1", "1"));
}
#[test]
fn test_row_converter_with_invalid_numbers() {
// copy from wsl linux
let d = crate::Filesystem {
file: None,
mount_info: crate::MountInfo {
dev_id: "28".to_string(),
dev_name: "none".to_string(),
fs_type: "9p".to_string(),
mount_dir: "/usr/lib/wsl/drivers".to_string(),
mount_option: "ro,nosuid,nodev,noatime".to_string(),
mount_root: "/".to_string(),
remote: false,
dummy: false,
},
usage: crate::table::FsUsage {
blocksize: 4096,
blocks: 244029695,
bfree: 125085030,
bavail: 125085030,
bavail_top_bit_set: false,
files: 999,
ffree: 1000000,
},
};
let row = Row::from(d);
assert_eq!(row.inodes_used, 0);
}
}