Re: find and searching for specific expression in files
On Sat, May 30, 2009 at 11:25:12AM +0200, Zbigniew Szalbot wrote: > Hello, > > Can you please give me a hint how to use find to search for a specific > text within files? If you just want the filenames which contain the string you are searching for, use the "-l" argument to tell grep to print out the filenames. For example: grep -rl "string" . will print out all the filenames containning "string". > > > -- > Zbigniew Szalbot > > ___ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org" 郑天宇 2009年05月31日 -- zheng.org pgpN3TtCeoBit.pgp Description: PGP signature
Re: find and searching for specific expression in files
>> On Sat, 30 May 2009 11:25:12 +0200, >> "Zbigniew Szalbot" said: Z> Can you please give me a hint how to use find to search for a specific Z> text within files? People have mentioned using xargs in combination with find, but if you're dealing with Windows files on a server, be prepared for every kind of crap character in the filename you can imagine. Use nulls to delimit the filenames, i.e.: find . -mtime +7 -print0 | xargs -0 grep -i foo The GNU versions of find and xargs support the "0" options as well. -- Karl Vogel I don't speak for the USAF or my company iPod changed my life. Earbuds made me look so cool! Now I am stone deaf. --geek haiku ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: find and searching for specific expression in files
| while read x; do "$x"; done which should get around the list length limitations and provides for doing "extras" between the "do" and the "done". Specifically: find /path/to/files/ -mtime -2 -print | \ while read x; do grep "expression" "$x"; done same as -exec works but forks a process for each single file - slow -exec and + or xargs do the job ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: find and searching for specific expression in files
At 6:44 PM +0200 5/30/09, Wojciech Puchar wrote: >> the famous back-tics. >> >> % grep "expression" `find /path/to/files/ -mtime -2 -print` >> >> Of course, there are surely easier, faster and better means, >> but from this one, I know it just works. :-) Furthermore, I > >unless filelist exceed max lenght of arguments and unfortunately it >happens often I use bash as my default shell and have become rather enamored with the construct | while read x; do "$x"; done which should get around the list length limitations and provides for doing "extras" between the "do" and the "done". Specifically: find /path/to/files/ -mtime -2 -print | \ while read x; do grep "expression" "$x"; done -- Walter M. Pawley Wump Research & Company 676 River Bend Road, Roseburg, OR 97471 541-672-8975 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: find and searching for specific expression in files
the famous back-tics. % grep "expression" `find /path/to/files/ -mtime -2 -print` Of course, there are surely easier, faster and better means, but from this one, I know it just works. :-) Furthermore, I unless filelist exceed max lenght of arguments and unfortunately it happens often ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: find and searching for specific expression in files
On Sat, 30 May 2009 11:25:12 +0200, "Zbigniew Szalbot" wrote: > Hello, > > Can you please give me a hint how to use find to search for a specific > text within files? One valid solution is to combine find (to find the files) and grep (to search in them). For the combination, you can use the famous back-tics. % grep "expression" `find /path/to/files/ -mtime -2 -print` Of course, there are surely easier, faster and better means, but from this one, I know it just works. :-) Furthermore, I think -print is optional here. If you want to use the Midnight Commander, use Meta-? for a combined dialog: +- Find File --+ | | | Start at: ___[^] | | | | Filename: ___[^] | | | | Content: ___[^] | | | | [ ] case Sensitive | | | | [< OK >] [ Tree ][ Cancel ] | +--+ That's what I mostly use. -- Polytropon >From Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ... ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: find and searching for specific expression in files
On Saturday 30 May 2009 18:14:49 RW wrote: > On Sat, 30 May 2009 14:12:50 +0200 > > Mel Flynn wrote: > > On Saturday 30 May 2009 13:56:22 Valentin Bud wrote: > > > 2009/5/30 Zbigniew Szalbot > > > > > > You can use egrep -r * (grep -e) to search for specific text > > > pattern while you are in a directory with many sub directories. The > > > output is nice because it tells you the file in which the text > > > pattern was found :). > > > > Discouraged because: > > - it's possible to hit maxarglen if the root directory has many > > subdirectories. > > - Will not search hidden directories in the root directory because of > > the shell glob > > You can replace "egrep -r *" with "egrep -r ." > i.e. recurse from the current directory, rather than search or recurse > on everything that matches *. That avoids the first two problems, and > most of the time the third doesn't matter OP (and myself) have a different concept of 'most of the time'. But this may be cause I'm already so used to this concept that my fingers have it store locally and I could've used grep -r or the overall win is minimal (I often use -name '*.h', and arguably in small trees it wouldn't matter). > > > - cannot be combined with other search criteria such as the file's > > timestamp. -- Mel ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: find and searching for specific expression in files
Cut off the message a bit later and you will see that using a '+' to terminate the exec primitive emulates xargs behavior: thanks. i didn't know that On Saturday 30 May 2009 14:12:50 Mel Flynn wrote: I use + rather then ; so that one invocation for grep is done whenever maxarglen is hit (like if you used xargs(1)), rather then one grep per file. -- Mel ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: find and searching for specific expression in files
On Sat, 30 May 2009 14:12:50 +0200 Mel Flynn wrote: > On Saturday 30 May 2009 13:56:22 Valentin Bud wrote: > > 2009/5/30 Zbigniew Szalbot > > You can use egrep -r * (grep -e) to search for specific text > > pattern while you are in a directory with many sub directories. The > > output is nice because it tells you the file in which the text > > pattern was found :). > > Discouraged because: > - it's possible to hit maxarglen if the root directory has many > subdirectories. > - Will not search hidden directories in the root directory because of > the shell glob You can replace "egrep -r *" with "egrep -r ." i.e. recurse from the current directory, rather than search or recurse on everything that matches *. That avoids the first two problems, and most of the time the third doesn't matter > - cannot be combined with other search criteria such as the file's > timestamp. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: find and searching for specific expression in files
On Saturday 30 May 2009 17:57:14 Wojciech Puchar wrote: > >> because it tells you the file in which the text pattern was found :). > > > > Discouraged because: > > - it's possible to hit maxarglen if the root directory has many > > subdirectories. > > xargs is usefull too. i would it as forking for each > file will make processing really slow. xargs can cut input data into given > chunks with -n option, so grep will be called for say 100 files at once. Cut off the message a bit later and you will see that using a '+' to terminate the exec primitive emulates xargs behavior: On Saturday 30 May 2009 14:12:50 Mel Flynn wrote: > I use + rather then ; so that one >invocation for grep is done whenever maxarglen is hit (like if you used >xargs(1)), rather then one grep per file. -- Mel ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: find and searching for specific expression in files
because it tells you the file in which the text pattern was found :). Discouraged because: - it's possible to hit maxarglen if the root directory has many subdirectories. xargs is usefull too. i would it as forking for each file will make processing really slow. xargs can cut input data into given chunks with -n option, so grep will be called for say 100 files at once. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: find and searching for specific expression in files
I am using find in the following manner: find /path/to/files/ -mtime -2 -ls |less to find files which have been recently modified. But I would like to extend the search to find specific expression within files. -name is used to specify file name. How can I search for strings within text? no matter how you generate the list of files to search, use grep then on that list ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: find and searching for specific expression in files
On Sat, May 30, 2009 at 3:12 PM, Mel Flynn <
mel.flynn+fbsd.questi...@mailing.thruhere.net
> wrote:
> On Saturday 30 May 2009 13:56:22 Valentin Bud wrote:
> > 2009/5/30 Zbigniew Szalbot
> >
> > > >> Can you please give me a hint how to use find to search for a
> specific
> > > >> text within files?
> > > >
> > > > Generally, you don't - find(1) does not examine the contents of files
> > > > by itself, just their directory information. You normally use
> grep(1)
> > > > to search within a file.
> > >
> > > Ahhh - I use grep on daily basis. Now why didn't I think of it? I got
> so
> > > fixed on the idea of using find that I completely forgot about grep
> > >
> > > Sorry for the noise and thank you very much for your help!
> > >
> > > --
> > > Zbigniew Szalbot
> > >
> > > ___
> > > freebsd-questions@freebsd.org mailing list
> > > http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> > > To unsubscribe, send any mail to "
> > > freebsd-questions-unsubscr...@freebsd.org"
> >
> > Hello Mr. Zbigniew Szalbot,
> >
> > You can use egrep -r * (grep -e) to search for specific text pattern
> while
> > you are in a directory with many sub directories. The output is nice
> > because it tells you the file in which the text pattern was found :).
>
> Discouraged because:
> - it's possible to hit maxarglen if the root directory has many
> subdirectories.
Never occured so i didn't have a clue about it :|.
>
> - Will not search hidden directories in the root directory because of the
> shell glob
> - cannot be combined with other search criteria such as the file's
> timestamp.
>
> find . -type f -mtime 2 -exec grep '^Subject: \[SPAM\]' {} +
>
> will find all messages in a maildir modified within the last 2 minutes
> where
> the subject has been flagged as spam. I use + rather then ; so that one
> invocation for grep is done whenever maxarglen is hit (like if you used
> xargs(1)), rather then one grep per file.
> --
> Mel
This list is amazing because everyday you learn something new. Thanks.
a great day,
v
--
network warrior since 2005
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Re: find and searching for specific expression in files
On Saturday 30 May 2009 13:56:22 Valentin Bud wrote:
> 2009/5/30 Zbigniew Szalbot
>
> > >> Can you please give me a hint how to use find to search for a specific
> > >> text within files?
> > >
> > > Generally, you don't - find(1) does not examine the contents of files
> > > by itself, just their directory information. You normally use grep(1)
> > > to search within a file.
> >
> > Ahhh - I use grep on daily basis. Now why didn't I think of it? I got so
> > fixed on the idea of using find that I completely forgot about grep
> >
> > Sorry for the noise and thank you very much for your help!
> >
> > --
> > Zbigniew Szalbot
> >
> > ___
> > freebsd-questions@freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> > To unsubscribe, send any mail to "
> > freebsd-questions-unsubscr...@freebsd.org"
>
> Hello Mr. Zbigniew Szalbot,
>
> You can use egrep -r * (grep -e) to search for specific text pattern while
> you are in a directory with many sub directories. The output is nice
> because it tells you the file in which the text pattern was found :).
Discouraged because:
- it's possible to hit maxarglen if the root directory has many
subdirectories.
- Will not search hidden directories in the root directory because of the
shell glob
- cannot be combined with other search criteria such as the file's timestamp.
find . -type f -mtime 2 -exec grep '^Subject: \[SPAM\]' {} +
will find all messages in a maildir modified within the last 2 minutes where
the subject has been flagged as spam. I use + rather then ; so that one
invocation for grep is done whenever maxarglen is hit (like if you used
xargs(1)), rather then one grep per file.
--
Mel
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Re: find and searching for specific expression in files
2009/5/30 Zbigniew Szalbot > >> Can you please give me a hint how to use find to search for a specific > >> text within files? > > > > Generally, you don't - find(1) does not examine the contents of files by > > itself, just their directory information. You normally use grep(1) to > > search within a file. > > Ahhh - I use grep on daily basis. Now why didn't I think of it? I got so > fixed on the idea of using find that I completely forgot about grep > > Sorry for the noise and thank you very much for your help! > > -- > Zbigniew Szalbot > > ___ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscr...@freebsd.org" > Hello Mr. Zbigniew Szalbot, You can use egrep -r * (grep -e) to search for specific text pattern while you are in a directory with many sub directories. The output is nice because it tells you the file in which the text pattern was found :). a great day, v -- network warrior since 2005 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: find and searching for specific expression in files
>> Can you please give me a hint how to use find to search for a specific >> text within files? > > Generally, you don't - find(1) does not examine the contents of files by > itself, just their directory information. You normally use grep(1) to > search within a file. Ahhh - I use grep on daily basis. Now why didn't I think of it? I got so fixed on the idea of using find that I completely forgot about grep Sorry for the noise and thank you very much for your help! -- Zbigniew Szalbot ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: find and searching for specific expression in files
On Sat, May 30, 2009 at 11:25:12AM +0200, Zbigniew Szalbot wrote: > Hello, > > Can you please give me a hint how to use find to search for a specific > text within files? Generally, you don't - find(1) does not examine the contents of files by itself, just their directory information. You normally use grep(1) to search within a file. > > I am using find in the following manner: > > find /path/to/files/ -mtime -2 -ls |less > to find files which have been recently modified. But I would like to > extend the search to find specific expression within files. -name is used > to specify file name. How can I search for strings within text? > > It is probably in the man but I somehow overlook it. :( > > Thank you very much in advance! I guess you could use the '-exec' expression in find(1) to execute grep(1) to search for a string in the files examined. Or you could use the output of find(1) as a list of files that are given as arguments to grep(1). -- Erik Trulsson ertr1...@student.uu.se ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
