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xzless: Use --show-preproc-errors with "less" 632 and newer. 

This makes "less" show a warning if a decompression error occurred.

(cherry picked from commit fd0692b052)
This commit is contained in:
Lasse Collin 2024-02-09 23:00:05 +02:00
parent c692bd42be
commit 5e7a8c0869
1 changed files with 9 additions and 2 deletions
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11
src/scripts/xzless.in
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@ -47,13 +47,20 @@ if test "${LESSMETACHARS+set}" != set; then
LESSMETACHARS="$space$tab$nl'"';*?"()<>[|&^`#\$%=~' LESSMETACHARS="$space$tab$nl'"';*?"()<>[|&^`#\$%=~'
fi fi
if test "$(less -V | { read _ ver _ && echo ${ver%%.*}; })" -ge 429; then VER=$(less -V | { read _ ver _ && echo ${ver%%.*}; })
if test "$VER" -ge 429; then
# less 429 or later: LESSOPEN pipe will be used on # less 429 or later: LESSOPEN pipe will be used on
# standard input if $LESSOPEN begins with |-. # standard input if $LESSOPEN begins with |-.
LESSOPEN="|-$xz -cdfqQ -- %s" LESSOPEN="|-$xz -cdfqQ -- %s"
else else
LESSOPEN="|$xz -cdfqQ -- %s" LESSOPEN="|$xz -cdfqQ -- %s"
fi fi
SHOW_PREPROC_ERRORS=
if test "$VER" -ge 632; then
SHOW_PREPROC_ERRORS=--show-preproc-errors
fi
export LESSMETACHARS LESSOPEN export LESSMETACHARS LESSOPEN
exec less "$@" exec less $SHOW_PREPROC_ERRORS "$@"