OSC 46 Change Log File
Tell xterm which file to log its session to, in a build that can log.
OSC 46 ; Pt ST
xterm can copy everything it receives to a log file, and OSC 46 ; Pt ST names that file. Logging is turned on with the private mode CSI ? 46 h or from xterm’s menu.
Both are compiled out of a default xterm: logging needs --enable-logging (configure.in), and without it OSC 46 is not one of the numbers xterm acts on. Even a build with logging does not let a program choose the file unless it was also built with ALLOWLOGFILECHANGES, since that would let anything written to the terminal overwrite any file its user can; otherwise it rings the bell twice (do_osc).
libghostty-vt has no OSC 46, and ignores it as a default xterm does, so the case passes.
Validation
OSC46-1: Ignored
A
\e]46;/tmp/session.log\a
B
|AB____|
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