#4361: more command don't work as expected -----------------------------------------------+--------------------------- Reporter: phoudoin | Owner: axeld Type: bug | Status: new Priority: normal | Milestone: R1 Component: Applications/Command Line Tools | Version: R1/pre-alpha1 Resolution: | Keywords: Blocked By: | Blocking: Has a Patch: 0 | Platform: x86 -----------------------------------------------+--------------------------- Comment (by siarzhuk): Replying to [comment:7 korli]: > It seems also reproducible with "less -F". > When commenting the following lines in init() and deinit() in screen.c, the problem disappears. > > tputs(sc_init, sc_height, putchr); > > tputs(sc_deinit, sc_height, putchr); Those are {{{ enter_ca_mode smcup ti string to start programs using cup [...] exit_ca_mode rmcup te strings to end programs using cup }}} and defined in XTERM to set/unset DEC private mode 1049 {{{ CSI ? 1049h → Save cursor as in DECSC and use Alternate Screen Buffer, clearing it first. [...] CSI ? 1049l → Use Normal Screen Buffer and restore cursor as in DECRC. }}} This explains observed behaviour of the 'more' program - all output just goes to alternate screen buffer and is not visible on normal buffer after the program finishes. The 'less' has the chance to show its output to user because it waits until the key pressed at the EOF. In both cases the output is not visible in the Terminal history after the programs finish. Replying to [comment:11 jessicah]: > From what I've seen on Linux, `more` doesn't clear what it's printed, whereas `less` does. However, I did notice that `less -E` results in no output despite a file containing less than a screenful of text. So it seems the `less_is_more` mode on Haiku might need to also change the terminal emulation behaviour as well. Could you compare the less source code on your Linux with Haiku's one, check current values of ti/te (in case termcap used) or smcup/rmcup (in case terminfo) and LESS/MORE environment variables? Are there any ways to preset the less options? -- Ticket URL: <http://dev.haiku-os.org/ticket/4361#comment:13> Haiku <http://dev.haiku-os.org> Haiku - the operating system.