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PhoenixStarEclipse
n00b
Joined: 11 May 2017
Posts: 71
Location: Jiangsu/China
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 Posted: Sun Aug 19, 2018 5:09 pm Post subject: [Solved] Where is default $TERM set? |
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In recent linux systems, xterm has 256color support, so xterm-256color doesn't have to appear. However, my $TERM happens to be xterm-256color. I've checked .bashrc and /etc/bashrc, but found nothing about $TERM. I'm just curious where it was initially set.
I don't tend to change /etc/bash/bashrc, since it should only affect interactive shells, while I'd like it to affect everything.
Thanks for your time  .
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Last edited by PhoenixStarEclipse on Wed Aug 22, 2018 8:27 am; edited 1 time in total |
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khayyam
Watchman
Joined: 07 Jun 2012
Posts: 6227
Location: Room 101
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| Posted: Mon Aug 20, 2018 8:52 am Post subject: Re: Where is default $TERM set? |
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| PhoenixStarEclipse wrote: | | In recent linux systems, xterm has 256color support, so xterm-256color doesn't have to appear. However, my $TERM happens to be xterm-256color. I've checked .bashrc and /etc/bashrc, but found nothing about $TERM. I'm just curious where it was initially set. |
PhoenixStarEclipse ... it's set/reported by the terminal, or in the case of console by inittab/agetty. So, if you run screen, or tmux, within your xterm it'll detect the term supports 256 colours and set/report 'screen-256color'. For this reason you shouldn't set TERM in .bashrc or what-have-you.
HTH & best ... khay |
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PhoenixStarEclipse
n00b
Joined: 11 May 2017
Posts: 71
Location: Jiangsu/China
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| Posted: Mon Aug 20, 2018 9:11 am Post subject: Re: Where is default $TERM set? |
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| khayyam wrote: | | PhoenixStarEclipse wrote: | | In recent linux systems, xterm has 256color support, so xterm-256color doesn't have to appear. However, my $TERM happens to be xterm-256color. I've checked .bashrc and /etc/bashrc, but found nothing about $TERM. I'm just curious where it was initially set. |
PhoenixStarEclipse ... it's set/reported by the terminal, or in the case of console by inittab/agetty. So, if you run screen, or tmux, within your xterm it'll detect the term supports 256 colours and set/report 'screen-256color'. For this reason you shouldn't set TERM in .bashrc or what-have-you.
HTH & best ... khay |
So why did inittab set TERM to xterm-256color, something that doesn't even exist?
And why does simply running "xterm" gives me 256color support?
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mike155
Advocate
Joined: 17 Sep 2010
Posts: 4438
Location: Frankfurt, Germany
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| Posted: Mon Aug 20, 2018 10:32 am Post subject: |
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| Quote: | | xterm-256color, something that doesn't even exist? |
What do you mean by 'it doesn't exist'?
| Code: | # ls -la /etc/terminfo/x/xterm-256color
-rw-r--r-- 1 root root 3713 Mar 26 20:26 /etc/terminfo/x/xterm-256color
# qfile /etc/terminfo/x/xterm-256color
sys-libs/ncurses (/etc/terminfo/x/xterm-256color)
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Last edited by mike155 on Fri Feb 14, 2020 12:13 am; edited 1 time in total |
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khayyam
Watchman
Joined: 07 Jun 2012
Posts: 6227
Location: Room 101
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| Posted: Mon Aug 20, 2018 1:37 pm Post subject: Re: Where is default $TERM set? |
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| PhoenixStarEclipse wrote: | | In recent linux systems, xterm has 256color support, so xterm-256color doesn't have to appear. However, my $TERM happens to be xterm-256color. I've checked .bashrc and /etc/bashrc, but found nothing about $TERM. I'm just curious where it was initially set. |
| khayyam wrote: | | [...] it's set/reported by the terminal, or in the case of console by inittab/agetty. So, if you run screen, or tmux, within your xterm it'll detect the term supports 256 colours and set/report 'screen-256color'. For this reason you shouldn't set TERM in .bashrc or what-have-you. |
| PhoenixStarEclipse wrote: | | So why did inittab set TERM to xterm-256color, something that doesn't even exist? |
PhoenixStarEclipse ... read carefully, the statement about "inittab" was prefaced with "in the case of console", and as I said, for xterm, urxvt, st, etc, TERM would be set by the terminal itself.
| PhoenixStarEclipse wrote: | | And why does simply running "xterm" gives me 256color support? |
Because x11-terms/xterm supports 256 colours and so is distinct (terminfo wise) from the original xterm.
best ... khay |
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reavertm
Developer
Joined: 05 Feb 2004
Posts: 265
Location: Wrocław
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| Posted: Fri Feb 14, 2020 12:02 am Post subject: |
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Bummer then since at least mc built with ncurses doesn't seem to play nice with mouse in X11 terminal, when TERM is set to xterm-*color.
See https://midnight-commander.org/ticket/3954
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Tony0945
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Joined: 25 Jul 2006
Posts: 5127
Location: Illinois, USA
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| Posted: Fri Feb 14, 2020 1:57 pm Post subject: |
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| So just change inittab if you are running OpenRC |
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