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limits of grep

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limits of grep UNIX Help forum discussing the Unix Operating System and all variants including Irix, Solarix, and AIX. Unix was designed as a true multi-user operating system.

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  #1  
Old March 8th, 2005, 12:03 PM
guggach guggach is offline
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limits of grep
hi all,
i tried to grep the string '/**/'
no ways w/ every possible conbinations,
nota: i well know regexp.
no probls w/ sed or perl, but grep
any ideas
thanks
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Old March 9th, 2005, 07:00 PM
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Popular versions of grep have the -E option to allow the use of extended regular expressions. Alternatively if you're just trying to search for the literal string '/**/' - escape the shell chars out as needed:
Code:
grep '\/\*\*\/' files
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Old March 10th, 2005, 02:09 AM
guggach guggach is offline
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no ways w/ every possible conbinations,
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Old March 10th, 2005, 06:24 AM
zlutovsky zlutovsky is offline
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Quote:
Originally Posted by guggach
no ways w/ every possible conbinations,



Hello guggach,

perhaps I do not quite understand your problem, but the following runs correctly on HP-UX:

grep "/**/" <<!
asdf sdfg ghf
asdf dfgh wert /**/ asf
asdf sdfg ghf
asdf sdfg ghf
asdf wert /**/ asf
!

Regards
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Old March 10th, 2005, 07:13 AM
guggach guggach is offline
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ok, my grep is buggy yours is better !
whitch grep are you using ? xpg4, gnu, own ?
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Old March 10th, 2005, 09:11 AM
Paul Weaver Paul Weaver is offline
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Solaris 8
/usr/bin/grep (10032 bytes)
$ /usr/bin/grep
Usage: grep -hblcnsviw pattern file . . .

zlutovsky's example works.

/usr/xpg4/bin/grep - 13900 bytes
$ /usr/xpg4/bin/grep
Usage: grep [-E|-F] [-c|-l|-q] [-bhinsvwx] [file ...]
grep [-E|-F] [-c|-l|-q] [-bhinsvwx] -e pattern... [-f pattern_file]...[file...]
grep [-E|-F] [-c|-l|-q] [-bhinsvwx] [-e pattern]... -f pattern_file [file...]

zlutovsky's example also works.

GNU grep 2.5.1 works (on my debian box) too
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Old March 15th, 2005, 07:44 AM
zlutovsky zlutovsky is offline
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Quote:
Originally Posted by Paul Weaver
Solaris 8
/usr/bin/grep (10032 bytes)
$ /usr/bin/grep
Usage: grep -hblcnsviw pattern file . . .

zlutovsky's example works.

/usr/xpg4/bin/grep - 13900 bytes
$ /usr/xpg4/bin/grep
Usage: grep [-E|-F] [-c|-l|-q] [-bhinsvwx] [file ...]
grep [-E|-F] [-c|-l|-q] [-bhinsvwx] -e pattern... [-f pattern_file]...[file...]
grep [-E|-F] [-c|-l|-q] [-bhinsvwx] [-e pattern]... -f pattern_file [file...]

zlutovsky's example also works.

GNU grep 2.5.1 works (on my debian box) too



Hello guggach,

sorry for my late answer, I have not been here for a long time. I have used no spetial grep, it was grep probably on Linux, I do not remember.

Today I have rerun the script on HP-UX B.11.23, AIX 3 5, Linux 2.40.20-8 and on all these systems it works well.

Regards
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