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### Summary of Changes Fixes **#53** (*Fish shell integration panics with `inappropriate ioctl for device`*). #### 1. Fixed Non-TTY Stdin (`panic: inappropriate ioctl for device`) — Fixes #53 - **Root Cause**: When executing `iris init fish | source` (or sourcing shell configs), `os.Stdin` (FD 0) is connected to a pipe instead of a TTY. Calling `term.MakeRaw()` on a pipe returns `ENOTTY`. - **Fix**: Guarded `term.MakeRaw()` with `term.IsTerminal()` checks across `root/wrapper.go` and `root/root.go`. Added fallback to open and use `/dev/tty` when `os.Stdin` is not a terminal device. - **Fish IPC Hooks**: Added `fish_preexec` and `fish_postexec` event handlers to `iris init fish` to send `IRIS_CMD_START` / `IRIS_CMD_STOP` IPC signals over `$IRIS_FD`. #### 2. Fixed Shell Setup Order (Duplicate `fastfetch` / startup executions) — Fixes #53 - **Root Cause**: `iris setup` appended the init script to the bottom of shell configs (`config.fish`, `.zshrc`, `.bashrc`), causing pre-existing interactive startup commands to run twice. - **Fix**: Updated `setupCmd` in `root/init.go` to **prepend** `# Iris Autocomplete` to the top of shell configuration files. #### 3. Fixed Terminal Exit Loop Handling — Relates to #50 - **Root Cause**: When typing `exit` in the wrapped shell, Linux PTY returns `syscall.EIO` (`Input/output error`) on `ptmx.Read()` rather than `io.EOF`. `runWrapper()` was ignoring non-EOF errors and looping indefinitely without restoring the terminal or calling `os.Exit(0)`. - **Fix**: Updated the `ptmx.Read` error handler in `root/wrapper.go` to handle `syscall.EIO` and exit cleanly. --- ### Issues Addressed - Closes #53 - Relates to #50, #55 --- ### Verification Tested - [x] Verified `iris setup fish` / `iris init fish | source` initializes without `ioctl` panic. - [x] Verified typing `exit` in Fish, Zsh, and Bash terminates IRIS cleanly and restores standard terminal state. - [x] Ran `go test ./...` — all tests pass. --------- Co-authored-by: verse91 <versedev.store@proton.me> Co-authored-by: VERSE <sunnyone0901@gmail.com>