mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-16 12:31:52 -04:00
5cba06c71c
Add a new keysym type KT_CSI that generates CSI tilde sequences with automatic modifier encoding. The keysym value encodes the CSI parameter number, producing sequences like ESC [ <value> ~ or ESC [ <value> ; <mod> ~ when Shift, Alt, or Ctrl modifiers are held. This allows navigation keys (Home, End, Insert, Delete, PgUp, PgDn) and function keys to generate modifier-aware escape sequences without consuming string table entries for each modifier combination. Define key symbols for navigation keys (K_CSI_HOME, K_CSI_END, etc.) and function keys (K_CSI_F1 through K_CSI_F20) using standard xterm CSI parameter values. The modifier encoding follows the xterm convention: mod = 1 + (shift ? 1 : 0) + (alt ? 2 : 0) + (ctrl ? 4 : 0) Allowed CSI parameter values range from 0 to 99. Note: The Linux console historically uses a non-standard double-bracket format for F1-F5 (ESC [ [ A through ESC [ [ E) rather than the xterm tilde format (ESC [ 11 ~ through ESC [ 15 ~). The K_CSI_F1 through K_CSI_F5 definitions use the xterm format. Converting F1-F5 to KT_CSI would require updating the "linux" terminfo entry to match. Navigation keys and F6-F20 already use the tilde format and are fully compatible. Signed-off-by: Nicolas Pitre <npitre@baylibre.com> Link: https://patch.msgid.link/20260203045457.1049793-3-nico@fluxnic.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>