[debbugs-tracker] bug#36820: closed (grep "[[:cntrl:]]" /proc/1/cmdline works on 2.20 but not 3.3)

[GNU bug Tracking System]

Your message dated Sat, 27 Jul 2019 10:16:00 -0700
with message-id <address@hidden>
and subject line Re: bug#36820: grep "[[:cntrl:]]" /proc/1/cmdline works on 
2.20 but not 3.3
has caused the debbugs.gnu.org bug report #36820,
regarding grep "[[:cntrl:]]" /proc/1/cmdline works on 2.20 but not 3.3
to be marked as done.

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-- 
36820: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=36820
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--- Begin Message --- Subject: grep "[[:cntrl:]]" /proc/1/cmdline works on 2.20 but not 3.3 Date: Sat, 27 Jul 2019 07:52:37 +0800

# using grep 2.20 ...

# grep "[[:cntrl:]]" /proc/1/cmdline

Binary file /proc/1/cmdline matches

# using grep 3.3 or above 2.20 ...

# grep "[[:cntrl:]]" /proc/1/cmdline

... nothing returned

My best.,

Jeff

--- End Message ---

> --- Begin Message ---
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> Subject: 
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> Re: bug#36820: grep "[[:cntrl:]]" /proc/1/cmdline works on 2.20 but not 3.3
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>
>
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> Date: 
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> Sat, 27 Jul 2019 10:16:00 -0700
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> User-agent: 
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> Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0
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>
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> This is documented behavior; the grep manual says that when grep is reading a 
> binary file it "may treat non-text bytes as line terminators".
>
> You can use grep's -a (--text) option to if you want to match null bytes.
>
>
> --- End Message ---