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uucore/mode: handle mode 0

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Trimming all '0' characters results in an invalid string if the string
contained only '0's.
This commit is contained in:
Michael Debertol 2021-08-16 00:30:25 +02:00
parent 74958794c6
commit 9697c89d17
1 changed files with 14 additions and 12 deletions
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16
src/uucore/src/lib/features/mode.rs
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@ -11,20 +11,22 @@ use libc::{mode_t, S_IRGRP, S_IROTH, S_IRUSR, S_IWGRP, S_IWOTH, S_IWUSR};
pub fn parse_numeric(fperm: u32, mut mode: &str) -> Result<u32, String> {
let (op, pos) = parse_op(mode, Some('='))?;
mode = mode[pos..].trim().trim_start_matches('0');
if mode.len() > 4 {
Err(format!("mode is too large ({} > 7777)", mode))
} else {
mode = mode[pos..].trim();
match u32::from_str_radix(mode, 8) {
Ok(change) => Ok(match op {
Ok(change) => {
if change > 0o7777 {
Err(format!("mode is too large ({} > 7777", mode))
} else {
Ok(match op {
'+' => fperm | change,
'-' => fperm & !change,
'=' => change,
_ => unreachable!(),
}),
Err(err) => Err(err.to_string()),
})
}
}
Err(err) => Err(err.to_string()),
}
}
pub fn parse_symbolic(