I see some annoying behavior for GNU "less" on my machine:
If I type
in the shell the expected behavior would be similar to "cat" behavior i.e. if the file has less lines than the screen height allows, then less just displays the contents of the file and then exits. Instead, what happens is that less doesn't display anything!
When the file is larger than the screen height, then less -F behaves correctly i.e. it displays the file in a pager session.
The interesting thing is that less -F behaves perfectly well inside of a GNU screen session. I tried setting the TERM environment variable to "screen" while on a normal login shell, but that didn't help.
Any clues what might be leading to this behavior?
Here is a command line example of the aforementioned problem (normal shell session):
Inside of a screen session:
less is intended as an interactive program that uses advanced terminal features. It does its best to avoid modifying the contents of the terminal altogether; what you see happening is not nothing, but it in fact clearing the terminal, displaying the lines, instantly quitting, and restoring the contents of the terminal as most any curses-based program will do. It does seem a pretty useless commandline switch. I wonder if it predates less' use of curses.
I would guess screen's terminal emulation doesn't support any sort of content-restore feature, so less simply can't. To avoid it screwing with the terminal so much, try the --no-init aka -X option.
I don't know if you guys get this problem sometimes at Terminal but I had been having this problem since yesterday :( Maybe I overdid the Terminal. Even the codes that used to work doesn't work anymore.
Here is what 's happening:
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