https://bugzilla.redhat.com/show_bug.cgi?id=1329059 Petr Pisar <ppisar(a)redhat.com&gt; changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |CLOSED Resolution|--- |WORKSFORME Last Closed| |2016-04-21 02:28:49 --- Comment #1 from Petr Pisar <ppisar(a)redhat.com&gt; --- I cannot reproduce it on Fedora 23: TERM=xterm LESSOPEN=|/usr/bin/lesspipe.sh %s ncurses-5.9-21.20150214.fc23.x86_64 ncurses-libs-5.9-21.20150214.fc23.x86_64 xterm-318-2.fc23.x86_64 less-481-1.fc23.x86_64 perl-Pod-Perldoc-3.25-347.fc23.noarch Though I admit some people sometimes complained about the same issue. I would welcome reliable reproducer. To the question: Yes, perldoc has "-t" argument that disables ANSI sequences on the output. I think "perldoc --help" is not so hard way to discover it. I can fairly reproduce it with "perldoc -T perlreref | less". The capital -T prints the output to stdout instead of sending it to a pager. But the perldoc (that I have, the behavior changes with various perldoc versions) feeds the pager from a temporary file. strace shows: [pid 3367] execve("/usr/bin/less", ["less"], ["XDG_VTNR=1", "XDG_SESSION_ID=1", "SSH_AGENT_PID=2103", "HOSTNAME=dhcp-0-146.brq.redhat.c"..., "SHELL=/bin/bash", "TERM=xterm", "HISTSIZE=1000", "TERMPATH=/home/petr/.termcap:/et"..., "WINDOWID=65011747", "QTDIR=/usr/lib64/qt-3.3", "QTINC=/usr/lib64/qt-3.3/include", "XORG_RUN_AS_USER_OK=1", "USER=petr", "XTERM_SHELL=/bin/bash", "LS_COLORS=rs=0:di=01;34:ln=01;36"..., "SSH_AUTH_SOCK=/tmp/ssh-QUjk3MkTh"..., "PAGER=less", "PATH=/home/petr/bin:/usr/lib64/q"..., "MAIL=/var/spool/mail/petr", "_=/usr/bin/less", "QT_IM_MODULE=xim", "PWD=/home/petr", "XMODIFIERS=@im=SCIM", "EDITOR=/usr/bin/vim", "LANG=cs_CZ.UTF-8", "MODULEPATH=/etc/scl/modulefiles:"..., "LOADEDMODULES=", "HISTCONTROL=ignoredups", "XTERM_VERSION=XTerm(318)", "XTERM_LOCALE=cs_CZ.UTF-8", "HOME=/home/petr", "XDG_SEAT=seat0", "SHLVL=5", "LESS=-R", "LOGNAME=petr", "CVS_RSH=ssh", "QTLIB=/usr/lib64/qt-3.3/lib", "MODULESHOME=/usr/share/Modules", "LESSOPEN=|/usr/bin/lesspipe.sh %"..., "WINDOWPATH=1", "XDG_RUNTIME_DIR=/run/user/500", "DISPLAY=:0.0", "GTK_IM_MODULE=scim", "XAUTHORITY=/home/petr/.Xauthorit"..., "CCACHE_HASHDIR=", "BASH_FUNC_module()=() { eval `/"..., "BASH_FUNC_scl()=() { local CMD="...]) = 0 I suspect perldoc sets LESS=-R. I dont' have the variable in my environment: $ set |grep LESS LESSOPEN='|/usr/bin/lesspipe.sh %s' "perldoc -T perlreref | LESS=-R less" works for me. From my point of view, perldoc is fine in Fedora. This is issue in RHEL-7's perldoc. -- You are receiving this mail because: You are on the CC list for the bug.

https://bugzilla.redhat.com/show_bug.cgi?id=1329059 --- Comment #3 from Pavel Raiskup <praiskup(a)redhat.com&gt; --- (In reply to Petr Pisar from comment #1) I feel I'm facing some magic, because I'm not able to reproduce this on F23 neither, *now*. The question is whether it would be possible to not print terminal sequences *by default*; not how it can be done. But yes -- as it obviously works on F23, there is no need to change anything. That's right. Correct. (In reply to Petr Pisar from comment #2) In RHEL7, I'm able to reproduce it. Perldoc does not set the LESS variable, can be debugged by: $ cat lesswrap #! /bin/sh env | grep -i less less "$@" $ PAGER=./lesswrap perldoc perlreref Petr, can you confirm? -- You are receiving this mail because: You are on the CC list for the bug.

https://bugzilla.redhat.com/show_bug.cgi?id=1329059 --- Comment #5 from Petr Pisar <ppisar(a)redhat.com&gt; --- Yes, in RHEL-7 if the PAGER is defined, then the ANSI sequences are not interpreted. -- You are receiving this mail because: You are on the CC list for the bug.