[Bug 194016] New: xzgrep doesn't process the entire file

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194016

            Bug ID: 194016
           Summary: xzgrep doesn't process the entire file
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Many People
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: feld at FreeBSD.org

As reported on the mailing lists in 2012, and resurfaced recently:

http://lists.freebsd.org/pipermail/freebsd-current/2012-February/031896.html
http://lists.freebsd.org/pipermail/freebsd-stable/2014-September/080172.html


Original message below
----

This is -CURRENT of r231204, 9 Feb.

xzgrep seems to give up at first read().

$ yes a|head|xz|xzgrep -c a
10
$ yes a|head -100|xz|xzgrep -c a
100
$ yes a|head -10000|xz|xzgrep -c a
10000
$ yes a|head -100000|xz|xzgrep -c a
16384

bzgrep, zgrep and grep works as expected.

$ yes a|head|bzip2|bzgrep -c a
10
$ yes a|head -100|bzip2|bzgrep -c a
100
$ yes a|head -1000|bzip2|bzgrep -c a
1000
$ yes a|head -10000|bzip2|bzgrep -c a
10000
$ yes a|head -100000|bzip2|bzgrep -c a
100000
$ yes a|head -1000000|bzip2|bzgrep -c a
1000000
$ yes a|head -10000000|bzip2|bzgrep -c a
10000000

$ yes a|head|gzip|zgrep -c a
10
$ yes a|head -100|gzip|zgrep -c a
100
$ yes a|head -1000|gzip|zgrep -c a
1000
$ yes a|head -10000|gzip|zgrep -c a
10000
$ yes a|head -100000|gzip|zgrep -c a
100000
$ yes a|head -1000000|gzip|zgrep -c a
1000000
$ yes a|head -10000000|gzip|zgrep -c a
10000000

$ yes a|head|grep -c a
10
$ yes a|head -100|grep -c a
100
$ yes a|head -1000|grep -c a
1000
$ yes a|head -10000|grep -c a
10000
$ yes a|head -100000|grep -c a
100000
$ yes a|head -1000000|grep -c a
1000000
$ yes a|head -10000000|grep -c a
10000000

they are single binary (linked statically)

$ for f in xzgrep bzgrep zgrep grep; do ls -l $(which $f); done
-r-xr-xr-x  15 root  wheel  578352 Feb  2 00:39 /usr/bin/xzgrep*
-r-xr-xr-x  15 root  wheel  578352 Feb  2 00:39 /usr/bin/bzgrep*
-r-xr-xr-x  15 root  wheel  578352 Feb  2 00:39 /usr/bin/zgrep*
-r-xr-xr-x  15 root  wheel  578352 Feb  2 00:39 /usr/bin/grep*

-- 
kuro

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