diff options
Diffstat (limited to 'third_party/rust/dirs-sys/src/lib.rs')
| -rw-r--r-- | third_party/rust/dirs-sys/src/lib.rs | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/third_party/rust/dirs-sys/src/lib.rs b/third_party/rust/dirs-sys/src/lib.rs new file mode 100644 index 0000000000..4f9d67e760 --- /dev/null +++ b/third_party/rust/dirs-sys/src/lib.rs @@ -0,0 +1,216 @@ +use std::ffi::OsString; +use std::path::PathBuf; + +// we don't need to explicitly handle empty strings in the code above, +// because an empty string is not considered to be a absolute path here. +pub fn is_absolute_path(path: OsString) -> Option<PathBuf> { + let path = PathBuf::from(path); + if path.is_absolute() { + Some(path) + } else { + None + } +} + +#[cfg(all(unix, not(target_os = "redox")))] +extern crate libc; + +#[cfg(all(unix, not(target_os = "redox")))] +mod target_unix_not_redox { + +use std::env; +use std::ffi::{CStr, OsString}; +use std::mem; +use std::os::unix::ffi::OsStringExt; +use std::path::PathBuf; +use std::ptr; + +use super::libc; + +// https://github.com/rust-lang/rust/blob/master/src/libstd/sys/unix/os.rs#L498 +pub fn home_dir() -> Option<PathBuf> { + return env::var_os("HOME") + .and_then(|h| if h.is_empty() { None } else { Some(h) }) + .or_else(|| unsafe { fallback() }) + .map(PathBuf::from); + + #[cfg(any(target_os = "android", target_os = "ios", target_os = "emscripten"))] + unsafe fn fallback() -> Option<OsString> { + None + } + #[cfg(not(any(target_os = "android", target_os = "ios", target_os = "emscripten")))] + unsafe fn fallback() -> Option<OsString> { + let amt = match libc::sysconf(libc::_SC_GETPW_R_SIZE_MAX) { + n if n < 0 => 512 as usize, + n => n as usize, + }; + let mut buf = Vec::with_capacity(amt); + let mut passwd: libc::passwd = mem::zeroed(); + let mut result = ptr::null_mut(); + match libc::getpwuid_r( + libc::getuid(), + &mut passwd, + buf.as_mut_ptr(), + buf.capacity(), + &mut result, + ) { + 0 if !result.is_null() => { + let ptr = passwd.pw_dir as *const _; + let bytes = CStr::from_ptr(ptr).to_bytes(); + if bytes.is_empty() { + None + } else { + Some(OsStringExt::from_vec(bytes.to_vec())) + } + } + _ => None, + } + } +} + +} + +#[cfg(all(unix, not(target_os = "redox")))] +pub use self::target_unix_not_redox::home_dir; + +#[cfg(target_os = "redox")] +extern crate redox_users; + +#[cfg(target_os = "redox")] +mod target_redox { + +use std::path::PathBuf; + +use super::redox_users::{All, AllUsers, Config}; + +pub fn home_dir() -> Option<PathBuf> { + let current_uid = redox_users::get_uid().ok()?; + let users = AllUsers::basic(Config::default()).ok()?; + let user = users.get_by_id(current_uid)?; + + Some(PathBuf::from(user.home.clone())) +} + +} + +#[cfg(target_os = "redox")] +pub use self::target_redox::home_dir; + +#[cfg(all(unix, not(any(target_os = "macos", target_os = "ios"))))] +mod xdg_user_dirs; + +#[cfg(all(unix, not(any(target_os = "macos", target_os = "ios"))))] +mod target_unix_not_mac { + +use std::collections::HashMap; +use std::env; +use std::path::{Path, PathBuf}; + +use super::{home_dir, is_absolute_path}; +use super::xdg_user_dirs; + +fn user_dir_file(home_dir: &Path) -> PathBuf { + env::var_os("XDG_CONFIG_HOME").and_then(is_absolute_path).unwrap_or_else(|| home_dir.join(".config")).join("user-dirs.dirs") +} + +// this could be optimized further to not create a map and instead retrieve the requested path only +pub fn user_dir(user_dir_name: &str) -> Option<PathBuf> { + if let Some(home_dir) = home_dir() { + xdg_user_dirs::single(&home_dir, &user_dir_file(&home_dir), user_dir_name).remove(user_dir_name) + } else { + None + } +} + +pub fn user_dirs(home_dir_path: &Path) -> HashMap<String, PathBuf> { + xdg_user_dirs::all(home_dir_path, &user_dir_file(home_dir_path)) +} + +} + +#[cfg(all(unix, not(any(target_os = "macos", target_os = "ios"))))] +pub use self::target_unix_not_mac::{user_dir, user_dirs}; + +#[cfg(target_os = "windows")] +extern crate winapi; + +#[cfg(target_os = "windows")] +mod target_windows { + +use std::ffi::OsString; +use std::os::windows::ffi::OsStringExt; +use std::path::PathBuf; +use std::ptr; +use std::slice; + +use super::winapi; +use super::winapi::shared::winerror; +use super::winapi::um::{combaseapi, knownfolders, shlobj, shtypes, winbase, winnt}; + +pub fn known_folder(folder_id: shtypes::REFKNOWNFOLDERID) -> Option<PathBuf> { + unsafe { + let mut path_ptr: winnt::PWSTR = ptr::null_mut(); + let result = shlobj::SHGetKnownFolderPath(folder_id, 0, ptr::null_mut(), &mut path_ptr); + if result == winerror::S_OK { + let len = winbase::lstrlenW(path_ptr) as usize; + let path = slice::from_raw_parts(path_ptr, len); + let ostr: OsString = OsStringExt::from_wide(path); + combaseapi::CoTaskMemFree(path_ptr as *mut winapi::ctypes::c_void); + Some(PathBuf::from(ostr)) + } else { + combaseapi::CoTaskMemFree(path_ptr as *mut winapi::ctypes::c_void); + None + } + } +} + +pub fn known_folder_profile() -> Option<PathBuf> { + known_folder(&knownfolders::FOLDERID_Profile) +} + +pub fn known_folder_roaming_app_data() -> Option<PathBuf> { + known_folder(&knownfolders::FOLDERID_RoamingAppData) +} + +pub fn known_folder_local_app_data() -> Option<PathBuf> { + known_folder(&knownfolders::FOLDERID_LocalAppData) +} + +pub fn known_folder_music() -> Option<PathBuf> { + known_folder(&knownfolders::FOLDERID_Music) +} + +pub fn known_folder_desktop() -> Option<PathBuf> { + known_folder(&knownfolders::FOLDERID_Desktop) +} + +pub fn known_folder_documents() -> Option<PathBuf> { + known_folder(&knownfolders::FOLDERID_Documents) +} + +pub fn known_folder_downloads() -> Option<PathBuf> { + known_folder(&knownfolders::FOLDERID_Downloads) +} + +pub fn known_folder_pictures() -> Option<PathBuf> { + known_folder(&knownfolders::FOLDERID_Pictures) +} + +pub fn known_folder_public() -> Option<PathBuf> { + known_folder(&knownfolders::FOLDERID_Public) +} +pub fn known_folder_templates() -> Option<PathBuf> { + known_folder(&knownfolders::FOLDERID_Templates) +} +pub fn known_folder_videos() -> Option<PathBuf> { + known_folder(&knownfolders::FOLDERID_Videos) +} + +} + +#[cfg(target_os = "windows")] +pub use self::target_windows::{ + known_folder, known_folder_profile, known_folder_roaming_app_data, known_folder_local_app_data, + known_folder_music, known_folder_desktop, known_folder_documents, known_folder_downloads, + known_folder_pictures, known_folder_public, known_folder_templates, known_folder_videos +}; 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