fix(client): detach when terminal geometry is unavailable (#3531)

refs #3519

1 files changed, 17 insertions, 0 deletions

diff --git a/src/platform/mod.rs b/src/platform/mod.rs
index fc80bc64..b831e120 100644
--- a/src/platform/mod.rs
+++ b/src/platform/mod.rs
@@ -69,6 +69,23 @@ pub(crate) const fn capabilities() -> PlatformCapabilities {
     }
 }
 
+pub(crate) fn terminal_grid_size() -> std::io::Result<(u16, u16)> {
+    #[cfg(unix)]
+    let (cols, rows) = unix_common::read_terminal_grid_size()?;
+    #[cfg(windows)]
+    let (cols, rows) = windows::read_terminal_grid_size()?;
+    #[cfg(not(any(unix, windows)))]
+    let (cols, rows) = fallback::read_terminal_grid_size()?;
+
+    if cols == 0 || rows == 0 {
+        return Err(std::io::Error::new(
+            std::io::ErrorKind::InvalidData,
+            "terminal reported a zero-sized grid",
+        ));
+    }
+    Ok((cols, rows))
+}
+
 #[cfg(not(windows))]
 pub fn launch_server_daemon_command(command: &mut std::process::Command) -> std::io::Result<u32> {
     command.spawn().map(|child| child.id())