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Make auto-cd check for permissions (#12342)
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This commit is contained in:
pwygab
GitHub
@ -90,114 +90,6 @@ pub fn is_older(src: &Path, dst: &Path) -> Option<bool> {
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}
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}
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#[cfg(unix)]
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pub mod users {
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use nix::unistd::{Gid, Group, Uid, User};
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pub fn get_user_by_uid(uid: Uid) -> Option<User> {
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User::from_uid(uid).ok().flatten()
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}
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pub fn get_group_by_gid(gid: Gid) -> Option<Group> {
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Group::from_gid(gid).ok().flatten()
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}
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pub fn get_current_uid() -> Uid {
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Uid::current()
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}
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pub fn get_current_gid() -> Gid {
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Gid::current()
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}
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#[cfg(not(any(target_os = "linux", target_os = "freebsd", target_os = "android")))]
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pub fn get_current_username() -> Option<String> {
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get_user_by_uid(get_current_uid()).map(|user| user.name)
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}
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#[cfg(any(target_os = "linux", target_os = "freebsd", target_os = "android"))]
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pub fn current_user_groups() -> Option<Vec<Gid>> {
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if let Ok(mut groups) = nix::unistd::getgroups() {
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groups.sort_unstable_by_key(|id| id.as_raw());
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groups.dedup();
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Some(groups)
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} else {
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None
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}
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}
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/// Returns groups for a provided user name and primary group id.
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///
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/// # libc functions used
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///
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/// - [`getgrouplist`](https://docs.rs/libc/*/libc/fn.getgrouplist.html)
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///
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/// # Examples
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///
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/// ```ignore
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/// use users::get_user_groups;
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///
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/// for group in get_user_groups("stevedore", 1001).expect("Error looking up groups") {
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/// println!("User is a member of group #{group}");
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/// }
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/// ```
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#[cfg(not(any(target_os = "linux", target_os = "freebsd", target_os = "android")))]
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pub fn get_user_groups(username: &str, gid: Gid) -> Option<Vec<Gid>> {
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use nix::libc::{c_int, gid_t};
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use std::ffi::CString;
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// MacOS uses i32 instead of gid_t in getgrouplist for unknown reasons
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#[cfg(target_os = "macos")]
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let mut buff: Vec<i32> = vec![0; 1024];
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#[cfg(not(target_os = "macos"))]
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let mut buff: Vec<gid_t> = vec![0; 1024];
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let name = CString::new(username).ok()?;
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let mut count = buff.len() as c_int;
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// MacOS uses i32 instead of gid_t in getgrouplist for unknown reasons
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// SAFETY:
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// int getgrouplist(const char *user, gid_t group, gid_t *groups, int *ngroups);
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//
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// `name` is valid CStr to be `const char*` for `user`
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// every valid value will be accepted for `group`
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// The capacity for `*groups` is passed in as `*ngroups` which is the buffer max length/capacity (as we initialize with 0)
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// Following reads from `*groups`/`buff` will only happen after `buff.truncate(*ngroups)`
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#[cfg(target_os = "macos")]
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let res = unsafe {
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nix::libc::getgrouplist(
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name.as_ptr(),
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gid.as_raw() as i32,
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buff.as_mut_ptr(),
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&mut count,
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)
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};
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#[cfg(not(target_os = "macos"))]
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let res = unsafe {
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nix::libc::getgrouplist(name.as_ptr(), gid.as_raw(), buff.as_mut_ptr(), &mut count)
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};
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if res < 0 {
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None
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} else {
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buff.truncate(count as usize);
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buff.sort_unstable();
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buff.dedup();
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// allow trivial cast: on macos i is i32, on linux it's already gid_t
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#[allow(trivial_numeric_casts)]
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Some(
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buff.into_iter()
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.map(|id| Gid::from_raw(id as gid_t))
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.filter_map(get_group_by_gid)
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.map(|group| group.gid)
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.collect(),
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)
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}
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}
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}
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/// Get rest arguments from given `call`, starts with `starting_pos`.
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///
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/// It's similar to `call.rest`, except that it always returns NuGlob. And if input argument has
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