fn get_mounts()

in xar/clean_xar_mounts/src/main.rs [130:168]

• 31 lines of code
• 5 McCabe index (conditional complexity)

fn get_mounts(
    nsinfo: &MountNamespaceInfo,
    logger: &slog::Logger,
) -> Result<Vec<MountedFilesystem>> {
    // Read the process' mounts from our own process and mount
    // namespace.
    let proc_mounts_path = PathBuf::from(format!("/proc/{}/mounts", nsinfo.pid));

    let file = BufReader::new(File::open(proc_mounts_path)?);
    let mut mounts = Vec::new();
    for line in file.lines() {
        if let Ok(line) = line {
            let mut fields = line.split(' ').skip(1).take(2).map(str::to_string);
            // mtab can be escaped; fix it up before calling umount.
            // Details:
            // https://gnu.org/software/libc/manual/html_node/mtab.html
            // Note backslashes are just '\134' and not '\0134' - special
            // case.
            let mut mountpoint = fields
                .next()
                .expect("missing mountpoint field")
                .replace("\\134", "\\");
            for ch in "\t\r\n ".chars() {
                let replacement = ch.to_string();
                let needle = format!("\\{:o}", ch as u8);
                mountpoint = mountpoint.replace(&needle, &replacement);
            }
            let fstype = fields.next().unwrap();
            mounts.push(MountedFilesystem {
                mountpoint,
                chroot: nsinfo.chroot_path.clone(),
                fstype,
            })
        } else if let Err(ref e) = line {
            info!(logger, "Skipping invalid line: {:?} ({})", line, e);
        }
    }
    return Ok(mounts);
}