v0.1.5 (#40)

Reviewed-on: wrenn/wrenn#40

envd-rs/src/permissions/user.rs

@@ -0,0 +1,32 @@
+use nix::unistd::{Gid, Group, Uid, User};
+
+pub fn lookup_user(username: &str) -> Result<User, String> {
+    User::from_name(username)
+        .map_err(|e| format!("error looking up user '{username}': {e}"))?
+        .ok_or_else(|| format!("user '{username}' not found"))
+}
+
+pub fn get_uid_gid(user: &User) -> (Uid, Gid) {
+    (user.uid, user.gid)
+}
+
+pub fn get_user_groups(user: &User) -> Vec<Gid> {
+    let c_name = std::ffi::CString::new(user.name.as_str()).unwrap();
+    nix::unistd::getgrouplist(&c_name, user.gid).unwrap_or_default()
+}
+
+pub fn lookup_username_by_uid(uid: Uid) -> String {
+    User::from_uid(uid)
+        .ok()
+        .flatten()
+        .map(|u| u.name)
+        .unwrap_or_else(|| uid.to_string())
+}
+
+pub fn lookup_groupname_by_gid(gid: Gid) -> String {
+    Group::from_gid(gid)
+        .ok()
+        .flatten()
+        .map(|g| g.name)
+        .unwrap_or_else(|| gid.to_string())
+}