Merge #9347 from justinmk/tui-bsd

TUI: detect BSD vt console

1 files changed, 19 insertions, 0 deletions

diff --git a/src/nvim/tui/terminfo.c b/src/nvim/tui/terminfo.c
index ad86dd928b..ad57f0af7f 100644
--- a/src/nvim/tui/terminfo.c
+++ b/src/nvim/tui/terminfo.c
@@ -13,6 +13,7 @@
 #include "nvim/memory.h"
 #include "nvim/message.h"
 #include "nvim/option.h"
+#include "nvim/os/os.h"
 #include "nvim/tui/terminfo.h"
 #include "nvim/tui/terminfo_defs.h"
 
@@ -33,6 +34,24 @@ bool terminfo_is_term_family(const char *term, const char *family)
     && ('\0' == term[flen] || '-' == term[flen]);
 }
 
+bool terminfo_is_bsd_console(const char *term)
+{
+#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) \
+  || defined(__DragonFly__)
+  if (strequal(term, "vt220")         // OpenBSD
+      || strequal(term, "vt100")) {   // NetBSD
+    return true;
+  }
+# if defined(__FreeBSD__)
+  // FreeBSD console sets TERM=xterm, but it does not support xterm features
+  // like cursor-shaping. Assume that TERM=xterm is degraded. #8644
+  return strequal(term, "xterm") && !!os_getenv("XTERM_VERSION");
+# endif
+#else
+  return false;
+#endif
+}
+
 /// Loads a built-in terminfo db when we (unibilium) failed to load a terminfo
 /// record from the environment (termcap systems, unrecognized $TERM, …).
 /// We do not attempt to detect xterm pretenders here.