mirror of
https://github.com/RGBCube/uutils-coreutils
synced 2025-07-29 03:57:44 +00:00
uucore/fsext: refactor MountInfo construction
This commit is contained in:
Terts Diepraam
parent
de5c66adae
commit
d4a9d63ea2
1 changed files with 108 additions and 104 deletions
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@ -10,8 +10,6 @@
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use time::macros::format_description;
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use time::UtcOffset;
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pub use crate::*; // import macros from `../../macros.rs`
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#[cfg(any(target_os = "linux", target_os = "android"))]
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const LINUX_MTAB: &str = "/etc/mtab";
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#[cfg(any(target_os = "linux", target_os = "android"))]
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@ -61,7 +59,7 @@ use libc::{
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mode_t, strerror, S_IFBLK, S_IFCHR, S_IFDIR, S_IFIFO, S_IFLNK, S_IFMT, S_IFREG, S_IFSOCK,
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};
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use std::borrow::Cow;
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use std::convert::{AsRef, From};
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use std::convert::From;
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#[cfg(any(
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target_vendor = "apple",
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target_os = "freebsd",
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@ -145,63 +143,27 @@ impl BirthTime for Metadata {
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#[derive(Debug, Clone)]
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pub struct MountInfo {
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// it stores `volume_name` in windows platform and `dev_id` in unix platform
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/// Stores `volume_name` in windows platform and `dev_id` in unix platform
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pub dev_id: String,
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pub dev_name: String,
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pub fs_type: String,
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pub mount_dir: String,
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pub mount_option: String, // we only care "bind" option
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pub mount_root: String,
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pub mount_dir: String,
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/// We only care whether this field contains "bind"
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pub mount_option: String,
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pub remote: bool,
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pub dummy: bool,
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}
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impl MountInfo {
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fn set_missing_fields(&mut self) {
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#[cfg(unix)]
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{
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use std::os::unix::fs::MetadataExt;
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// We want to keep the dev_id on Windows
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// but set dev_id
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if let Ok(stat) = std::fs::metadata(&self.mount_dir) {
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// Why do we cast this to i32?
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self.dev_id = (stat.dev() as i32).to_string();
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} else {
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self.dev_id = String::new();
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}
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}
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// set MountInfo::dummy
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// spell-checker:disable
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match self.fs_type.as_ref() {
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"autofs" | "proc" | "subfs"
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/* for Linux 2.6/3.x */
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| "debugfs" | "devpts" | "fusectl" | "mqueue" | "rpc_pipefs" | "sysfs"
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/* FreeBSD, Linux 2.4 */
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| "devfs"
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/* for NetBSD 3.0 */
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| "kernfs"
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/* for Irix 6.5 */
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| "ignore" => self.dummy = true,
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_ => self.dummy = self.fs_type == "none"
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&& !self.mount_option.contains(MOUNT_OPT_BIND)
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}
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// spell-checker:enable
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// set MountInfo::remote
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#[cfg(windows)]
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{
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self.remote = DRIVE_REMOTE == unsafe { GetDriveTypeW(String2LPWSTR!(self.mount_root)) };
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}
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#[cfg(unix)]
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{
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self.remote = self.dev_name.find(':').is_some()
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|| (self.dev_name.starts_with("//") && self.fs_type == "smbfs"
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|| self.fs_type == "cifs")
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|| self.dev_name == "-hosts";
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}
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}
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#[cfg(any(target_os = "linux", target_os = "android"))]
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fn new(file_name: &str, raw: &[&str]) -> Option<Self> {
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let dev_name;
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let fs_type;
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let mount_root;
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let mount_dir;
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let mount_option;
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match file_name {
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// spell-checker:ignore (word) noatime
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// Format: 36 35 98:0 /mnt1 /mnt2 rw,noatime master:1 - ext3 /dev/root rw,errors=continue
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@ -211,36 +173,38 @@ impl MountInfo {
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let after_fields = raw[FIELDS_OFFSET..].iter().position(|c| *c == "-").unwrap()
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+ FIELDS_OFFSET
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+ 1;
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let mut m = Self {
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dev_id: String::new(),
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dev_name: raw[after_fields + 1].to_string(),
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fs_type: raw[after_fields].to_string(),
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mount_root: raw[3].to_string(),
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mount_dir: raw[4].to_string(),
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mount_option: raw[5].to_string(),
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remote: false,
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dummy: false,
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};
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m.set_missing_fields();
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Some(m)
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dev_name = raw[after_fields + 1].to_string();
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fs_type = raw[after_fields].to_string();
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mount_root = raw[3].to_string();
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mount_dir = raw[4].to_string();
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mount_option = raw[5].to_string();
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}
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LINUX_MTAB => {
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let mut m = Self {
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dev_id: String::new(),
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dev_name: raw[0].to_string(),
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fs_type: raw[2].to_string(),
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mount_root: String::new(),
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mount_dir: raw[1].to_string(),
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mount_option: raw[3].to_string(),
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remote: false,
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dummy: false,
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};
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m.set_missing_fields();
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Some(m)
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dev_name = raw[0].to_string();
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fs_type = raw[2].to_string();
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mount_root = String::new();
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mount_dir = raw[1].to_string();
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mount_option = raw[3].to_string();
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}
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_ => None,
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}
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_ => return None,
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};
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let dev_id = mount_dev_id(&mount_dir);
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let dummy = is_dummy_filesystem(&fs_type, &mount_option);
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let remote = is_remote_filesystem(&dev_name, &fs_type);
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Some(Self {
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dev_id,
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dev_name,
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fs_type,
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mount_dir,
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mount_option,
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mount_root,
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remote,
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dummy,
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})
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}
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#[cfg(windows)]
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fn new(mut volume_name: String) -> Option<Self> {
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let mut dev_name_buf = [0u16; MAX_PATH];
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@ -293,18 +257,17 @@ impl MountInfo {
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} else {
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Some(LPWSTR2String(&fs_type_buf))
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};
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let mut mn_info = Self {
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let remote = DRIVE_REMOTE == unsafe { GetDriveTypeW(String2LPWSTR!(self.mount_root)) };
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Some(Self {
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dev_id: volume_name,
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dev_name,
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fs_type: fs_type.unwrap_or_default(),
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mount_root,
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mount_dir: String::new(),
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mount_option: String::new(),
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remote: false,
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remote,
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dummy: false,
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};
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mn_info.set_missing_fields();
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Some(mn_info)
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})
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}
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}
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@ -316,33 +279,74 @@ impl MountInfo {
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))]
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impl From<StatFs> for MountInfo {
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fn from(statfs: StatFs) -> Self {
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let mut info = Self {
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let dev_name = unsafe {
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// spell-checker:disable-next-line
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CStr::from_ptr(&statfs.f_mntfromname[0])
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.to_string_lossy()
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.into_owned()
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};
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let fs_type = unsafe {
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// spell-checker:disable-next-line
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CStr::from_ptr(&statfs.f_fstypename[0])
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.to_string_lossy()
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.into_owned()
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};
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let mount_dir = unsafe {
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// spell-checker:disable-next-line
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CStr::from_ptr(&statfs.f_mntonname[0])
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.to_string_lossy()
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.into_owned()
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};
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let dummy = is_dummy_filesystem(&fs_type, &mount_option);
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let remote = is_remote_filesystem(&dev_name, &fs_type);
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Self {
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dev_id: String::new(),
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dev_name: unsafe {
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// spell-checker:disable-next-line
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CStr::from_ptr(&statfs.f_mntfromname[0])
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.to_string_lossy()
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.into_owned()
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},
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fs_type: unsafe {
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// spell-checker:disable-next-line
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CStr::from_ptr(&statfs.f_fstypename[0])
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.to_string_lossy()
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.into_owned()
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},
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mount_dir: unsafe {
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// spell-checker:disable-next-line
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CStr::from_ptr(&statfs.f_mntonname[0])
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.to_string_lossy()
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.into_owned()
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},
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dev_name,
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fs_type,
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mount_dir,
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mount_root: String::new(),
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mount_option: String::new(),
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remote: false,
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dummy: false,
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};
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info.set_missing_fields();
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info
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remote,
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dummy,
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}
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}
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}
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#[cfg(unix)]
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fn is_dummy_filesystem(fs_type: &str, mount_option: &str) -> bool {
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match fs_type {
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"autofs" | "proc" | "subfs"
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// for Linux 2.6/3.x
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| "debugfs" | "devpts" | "fusectl" | "mqueue" | "rpc_pipefs" | "sysfs"
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// FreeBSD, Linux 2.4
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| "devfs"
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// for NetBSD 3.0
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| "kernfs"
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// for Irix 6.5
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| "ignore" => true,
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_ => fs_type == "none"
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&& !mount_option.contains(MOUNT_OPT_BIND)
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}
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}
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#[cfg(unix)]
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fn is_remote_filesystem(dev_name: &str, fs_type: &str) -> bool {
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dev_name.find(':').is_some()
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|| (dev_name.starts_with("//") && fs_type == "smbfs" || fs_type == "cifs")
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|| dev_name == "-hosts"
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}
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#[cfg(unix)]
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fn mount_dev_id(mount_dir: &str) -> String {
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use std::os::unix::fs::MetadataExt;
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if let Ok(stat) = std::fs::metadata(&mount_dir) {
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// Why do we cast this to i32?
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(stat.dev() as i32).to_string()
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} else {
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String::new()
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}
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}
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