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Bug 651038 - sys-apps/man-1.6g-r1 - man-1.6g-echo-escape.patch corrupts output in pager
Summary: sys-apps/man-1.6g-r1 - man-1.6g-echo-escape.patch corrupts output in pager
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal with 1 vote (vote)
Assignee: Gentoo's Team for Core System packages
Depends on:
Blocks: 648824
  Show dependency tree
Reported: 2018-03-20 21:41 UTC by Nick Bowler
Modified: 2020-03-07 21:59 UTC (History)
0 users

See Also:
Package list:
Runtime testing required: ---

fix nonportable echo properly (nonportable-echo.patch,607 bytes, patch)
2018-03-20 21:52 UTC, Nick Bowler
Details | Diff

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Description Nick Bowler 2018-03-20 21:41:46 UTC
The recently stabilised sys-apps/man-1.6g-r1 corrupts the output when running
in a pager (i.e., whenever standard output is connected to a terminal).

Open any manpage, then scroll to the bottom.  A small portion of the
document is missing, replaced with the text '(nlu+10'.

For example:

  % MANPAGER=cat man man
         apropos(1), whatis(1), less(1), groff(1), man.conf(5).  (nlu+10

Expected results, as seen in sys-apps/man-1.6g:

  % MANPAGER=cat man man
       apropos(1), whatis(1), less(1), groff(1), man.conf(5).

                              September 19, 2005                        man(1)

(Note that the bottom few lines are missing).

The problem is in the (Gentoo-specific) man-1.6g-echo-escape.patch, which
is rather misguided.  The key thing to note is that the \n wasn't intended
as a newline: it is part of a roff directive that got mangled by this patch.

(The intended directive is \n(nl to obtain the value of the nl register)

Since it is difficult to portably print the sequence '\n' using echo a
solution is to use printf.  Changing the patch to something like this
should work OK:

   strcat(buft, "; printf '%s\\n' \".\\\\\\\"\" \".pl \\n(nlu+10\"")

Which produces the intended roff directives:

  .pl \n(nlu+10

and the display is correct again, yay.

Portage 2.3.24 (python 3.5.4-final-0, default/linux/amd64/17.0, gcc-6.4.0, glibc-2.25-r10, 4.15.11 x86_64)
System uname: Linux-4.15.11-x86_64-Intel-R-_Core-TM-2_Quad_CPU_Q8300_@_2.50GHz-with-gentoo-2.4.1
KiB Mem:     4038996 total,    149332 free
KiB Swap:    1993724 total,   1989628 free
Timestamp of repository gentoo: Mon, 19 Mar 2018 00:55:01 +0000
Head commit of repository palemoon: bb6da539e7cc3814006cf3be9a1433e4bccd64aa

sh bash 4.4_p12
ld GNU ld (Gentoo 2.29.1 p3) 2.29.1
distcc 3.2rc1 x86_64-pc-linux-gnu [disabled]
ccache version 3.2.4 [enabled]
app-shells/bash:          4.4_p12::gentoo
dev-java/java-config:     2.2.0-r3::gentoo
dev-lang/perl:            5.24.3::gentoo
dev-lang/python:          2.7.14-r1::gentoo, 3.5.4-r1::gentoo, 3.6.3-r1::gentoo
dev-util/ccache:          3.2.4::gentoo
dev-util/cmake:           3.9.6::gentoo
sys-apps/baselayout:      2.4.1-r2::gentoo
sys-apps/openrc:          0.34.11::gentoo
sys-apps/sandbox:         2.12::gentoo
sys-devel/autoconf:       2.13::gentoo, 2.69-r4::gentoo
sys-devel/automake:       1.11.6-r2::gentoo, 1.15.1-r2::gentoo
sys-devel/binutils:       2.29.1-r1::gentoo
sys-devel/gcc:            3.4.6-r2::gentoo, 4.1.2::gentoo, 4.2.4-r1::gentoo, 4.8.5-r1::gentoo, 4.9.4::gentoo, 5.4.0-r4::gentoo, 6.4.0-r1::gentoo, 7.3.0::gentoo
sys-devel/gcc-config:     1.9.0-r1::gentoo
sys-devel/libtool:        2.4.6-r3::gentoo
sys-devel/make:           4.2.1::gentoo
sys-kernel/linux-headers: 4.13::gentoo (virtual/os-headers)
sys-libs/glibc:           2.25-r10::gentoo

    location: /srv/repos/gentoo
    sync-type: webrsync
    sync-uri: rsync://
    sync-user: portage
    priority: -1000

    location: /srv/repos/gentoo-draconx
    masters: gentoo

    location: /srv/repos/gentoo-fixes
    masters: gentoo

    location: /srv/repos/palemoon
    sync-type: git
    masters: gentoo

CFLAGS="-O2 -march=core2 -pipe"
CONFIG_PROTECT="/etc /etc/stunnel/stunnel.conf /usr/share/config /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/ssl/certs/ca-certificates.crt /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-O2 -march=core2 -pipe"
EMERGE_DEFAULT_OPTS="--keep-going --quiet-build --autounmask-write=n --dynamic-deps=n --unordered-display --verbose-conflicts --with-bdeps-auto=n"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs binpkg-multi-instance ccache config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync multilib-strict news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync webrsync-gpg xattr"
FFLAGS="-O2 -pipe"
INSTALL_MASK="/usr/share/cursors/xorg-x11/default 	/usr/share/alsa/alsa.conf.d/51-pulseaudio-probe.conf 	/etc/portage/*postsync.d 	/etc/profile.d/ 	/etc/portage/bin/post_sync"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
LINGUAS="en_CA en ja"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
USE="X acl alsa amd64 berkdb bzip2 cairo cjk cli crypt cups curl cvs cxx doc dri enca exif fbcon fdt ffmpeg flac fontconfig fontforge fortran gdbm gnutls gpm graphviz gtk iconv icu idn imagemagick ipv6 jadetex jpeg jpeg2k kerberos kpathsea latex lcms libass lto mad modules mp3 mp4 multilib ncurses nls nptl ogg opengl openmp otr pam pcre perl png python readline sdl seccomp smp ssl svg tcpd tex4ht theora threads tiff truetype unicode vim-syntax vorbis xattr xcb xft xinerama xulrunner xv zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext sse sse2 sse3 sse4_1 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" KERNEL="linux" L10N="en-CA en ja ko" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6 php7-0" POSTGRES_TARGETS="postgres9_5" PYTHON_SINGLE_TARGET="python3_5" PYTHON_TARGETS="python2_7 python3_5" QEMU_SOFTMMU_TARGETS="arm i386 x86_64" QEMU_USER_TARGETS="arm mips mipsel ppc ppc64" RUBY_TARGETS="ruby22 ruby23" USERLAND="GNU" VIDEO_CARDS="intel radeon" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Comment 1 Nick Bowler 2018-03-20 21:52:57 UTC
Created attachment 524624 [details, diff]
fix nonportable echo properly

Suggested replacement for man-1.6g-echo-escape.patch
Comment 2 Matt Whitlock 2018-12-29 11:12:48 UTC
(In reply to Nick Bowler from comment #1)
> Created attachment 524624 [details, diff] [details, diff]
> fix nonportable echo properly
> Suggested replacement for man-1.6g-echo-escape.patch

I confirm that the replacement patch does correct the "(nlu+10" problem.

If sys-apps/man is no longer going to be maintained, shouldn't it be removed from the tree? I personally am not looking forward to switching to sys-apps/man-db, as it looks to be over-engineered from my perspective, but I also don't want to use a man implementation that is going to slowly rot.
Comment 3 Larry the Git Cow gentoo-dev 2020-03-07 21:59:25 UTC
The bug has been closed via the following commit(s):

commit ce370f012e25ad2eb756cbcaf768bf053161d067
Author:     Mike Gilbert <>
AuthorDate: 2020-03-07 21:54:44 +0000
Commit:     Mike Gilbert <>
CommitDate: 2020-03-07 21:59:07 +0000

    sys-apps/man: remove package
    Signed-off-by: Mike Gilbert <>

 profiles/package.mask                              |   6 -
 sys-apps/man/Manifest                              |   1 -
 sys-apps/man/files/makewhatis.cron                 |   5 -
 sys-apps/man/files/man-1.5m2-apropos.patch         |  16 ---
 sys-apps/man/files/man-1.6-cross-compile.patch     |  61 ----------
 .../files/man-1.6c-cut-duplicate-manpaths.patch    |  83 -------------
 sys-apps/man/files/man-1.6e-headers.patch          |  13 --
 .../man-1.6f-makewhatis-compression-cleanup.patch  |  69 -----------
 .../files/man-1.6f-man2html-compression-2.patch    |  61 ----------
 sys-apps/man/files/man-1.6f-parallel-build.patch   |  78 ------------
 sys-apps/man/files/man-1.6f-so-search-2.patch      |  34 ------
 sys-apps/man/files/man-1.6f-unicode.patch          |  28 -----
 sys-apps/man/files/man-1.6g-compress.patch         |  17 ---
 sys-apps/man/files/man-1.6g-echo-escape.patch      |  15 ---
 sys-apps/man/files/man-1.6g-fbsd.patch             |  15 ---
 sys-apps/man/files/man-1.6g-xz.patch               |  53 ---------
 sys-apps/man/man-1.6g-r1.ebuild                    | 131 ---------------------
 sys-apps/man/metadata.xml                          |   8 --
 18 files changed, 694 deletions(-)