all: split reusable components into workspace crates

src/utils/pid_info.rs

@@ -1,59 +0,0 @@
-use {
-    crate::utils::{errorfmt::ErrorFmt, oserror::OsErrorExt},
-    bstr::ByteSlice,
-    std::os::unix::ffi::OsStrExt,
-    uapi::{OwnedFd, c},
-};
-
-pub struct PidInfo {
-    pub uid: c::uid_t,
-    pub pid: c::pid_t,
-    pub comm: String,
-    pub exe: String,
-}
-
-pub fn get_pid_info(uid: c::uid_t, pid: c::pid_t) -> PidInfo {
-    let comm = match std::fs::read(format!("/proc/{}/comm", pid)) {
-        Ok(name) => name.trim_ascii_end().as_bstr().to_string(),
-        Err(e) => {
-            log::warn!("Could not read `comm` of pid {}: {}", pid, ErrorFmt(e));
-            "Unknown".to_string()
-        }
-    };
-    let exe = match std::fs::read_link(format!("/proc/{}/exe", pid)) {
-        Ok(name) => name
-            .as_os_str()
-            .as_bytes()
-            .trim_ascii_end()
-            .as_bstr()
-            .to_string(),
-        Err(e) => {
-            log::warn!("Could not read `exe` of pid {}: {}", pid, ErrorFmt(e));
-            "Unknown".to_string()
-        }
-    };
-    PidInfo {
-        uid,
-        pid,
-        comm,
-        exe,
-    }
-}
-
-pub fn get_socket_creds(socket: &OwnedFd) -> Option<(c::uid_t, c::pid_t)> {
-    let mut cred = c::ucred {
-        pid: 0,
-        uid: 0,
-        gid: 0,
-    };
-    match uapi::getsockopt(socket.raw(), c::SOL_SOCKET, c::SO_PEERCRED, &mut cred).to_os_error() {
-        Ok(_) => Some((cred.uid, cred.pid)),
-        Err(e) => {
-            log::error!(
-                "Cannot determine peer credentials of new connection: {}",
-                ErrorFmt(e),
-            );
-            None
-        }
-    }
-}