FS#43421 - [gnome-terminal] "grep --color" eats character at terminal boundary.
Attached to Project:
Arch Linux
Opened by Chunwei Chen (tuxoko) - Monday, 12 January 2015, 15:22 GMT
Last edited by Jan de Groot (JGC) - Sunday, 05 April 2015, 10:47 GMT
Opened by Chunwei Chen (tuxoko) - Monday, 12 January 2015, 15:22 GMT
Last edited by Jan de Groot (JGC) - Sunday, 05 April 2015, 10:47 GMT
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Details
Description:
"grep --color" eats character at terminal boundary. Additional info: grep 2.21-1 gnome-terminal 3.14.2-1 Steps to reproduce: For example, doing "ps aux | grep system" In nocolor.png, you can see that there are several lines wrap at "system". In color.png, adding --color causes the last character 'm' to disappear. In other two pngs, you can see that grepping "syste" or "systemd" are fine. Another example, I shrink the terminal width by two, so those lines wrap at "syst" Now in emd.png, "ps aux | grep emd" also causes the last character 't' to disappear. So basically, "grep --color" will eat character if your keyword happens to be just before or just after the line wrap. 
nocolor.png
(150.3 KiB)
color.png
(161 KiB)
syste.png
(160.2 KiB)
systemd.png
(145.4 KiB)
emd.png
(136.4 KiB)
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This task depends upon
Doing "ps aux | grep --color=always system > output.txt"
And the output file seems fine.
https://bugzilla.gnome.org/show_bug.cgi?id=740789
https://bugzilla.redhat.com/show_bug.cgi?id=1168182
http://savannah.gnu.org/bugs/?36831
Future gnome-terminal-3.16 (actually vte-0.40) will intentionally deviate from xterm so that this doesn't happen.
Until then a workaround is: export GREP_COLORS=ne
The vte fix is here: https://git.gnome.org/browse/vte/commit/?id=916964e
And I confirmed that the issue has been fixed.
Thanks.