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Full Discussion: Find a string across line break (because of "segmentation fault core dumped")
Top Forums UNIX for Dummies Questions & Answers Find a string across line break (because of "segmentation fault core dumped") Post 302926332 by thewizarde6 on Sunday 23rd of November 2014 12:29:33 PM
Old 11-23-2014
Hammer & Screwdriver Find a string across line break (because of "segmentation fault core dumped")
Hi,
thanks to a precedent post, and thanks to the reply of derekludwig of the forum, I have convert my first awk command as :

test.txt is : AAAAAGHIJKLAjKMEFJKLjklABCDJkLEFGHIJKL

Code:
awk -f findstring.awk test.txt > textreturn.txt

findstring.awk is :

Code:
BEGIN{ SLENGTH = 3 }
{
    
    skipped = 0
    starts = ""
 line   = tolower($0)
    while ( SSTART = index(line,string )) {
        starts = starts (starts?" ":"") (skipped + SSTART)
        line = substr(line,SSTART + SLENGTH)
        skipped += (SSTART + SLENGTH - 1)
    }
}
starts { print starts }

to find all "JKL" regular expression anyway the type of case. It returns 9 18 21 28 36.

Now, I would like to know if it is possible to find this string across different lines and obtain the first result, for example with test.txt like this :

AAAAAGHI
JKLAjKMEFJK
LjklABCDJkLEFGHIJKL

I have tried to transform input file as a unique line with this command :

Code:
awk -vRS="" ' {gsub("\n","",$0) ; print ""$0""} test.txt > test2.txt

But my file is so heavy that I receive this error :
Code:
segmentation fault (core dumped)

I have also tried this one :
Code:
cat test.txt | xargs |sed -e 's/ //g' > test2.txt

and it seems to be works (no messages).

But, by exploring the result file for one heavy file, not all lines are in one line; there is just less number of lines.

Thanks for your help,
Bye.
 

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LEARN ABOUT REDHAT

dos2unix

dos2unix(1)						      General Commands Manual						       dos2unix(1)

NAME

       dos2unix - DOS/MAC to UNIX text file format converter

SYNOPSYS

       dos2unix [options] [-c convmode] [-o file ...] [-n infile outfile ...]

       Options:

       [-hkqV] [--help] [--keepdate] [--quiet] [--version]

DESCRIPTION

       This manual page documents dos2unix, the program that converts plain text files in DOS/MAC format to UNIX format.

OPTIONS

       The following options are available:

       -h --help
	      Print online help.

       -k --keepdate
	      Keep the date stamp of output file same as input file.

       -q --quiet
	      Quiet mode. Suppress all warning and messages.

       -V --version
	      Prints version information.

       -c --convmode convmode
	      Sets conversion mode. Simulates dos2unix under SunOS.

       -o --oldfile file ...
	      Old file mode. Convert the file and write output to it. The program default to run in this mode. Wildcard names may be used.

       -n --newfile infile outfile ...
	      New  file  mode.	Convert the infile and write output to outfile. File names must be given in pairs and wildcard names should NOT be
	      used or you WILL lost your files.

EXAMPLES

       Get input from stdin and write output to stdout.

	      dos2unix

       Convert and replace a.txt. Convert and replace b.txt.

	      dos2unix a.txt b.txt

	      dos2unix -o a.txt b.txt

       Convert and replace a.txt in ASCII conversion mode.  Convert and replace b.txt in ISO conversion mode.  Convert	c.txt  from  Mac  to  Unix
       ascii format.

	      dos2unix a.txt -c iso b.txt

	      dos2unix -c ascii a.txt -c iso b.txt

	      dos2unix -c mac a.txt b.txt

       Convert and replace a.txt while keeping original date stamp.

	      dos2unix -k a.txt

	      dos2unix -k -o a.txt

       Convert a.txt and write to e.txt.

	      dos2unix -n a.txt e.txt

       Convert a.txt and write to e.txt, keep date stamp of e.txt same as a.txt.

	      dos2unix -k -n a.txt e.txt

       Convert and replace a.txt. Convert b.txt and write to e.txt.

	      dos2unix a.txt -n b.txt e.txt

	      dos2unix -o a.txt -n b.txt e.txt

       Convert c.txt and write to e.txt. Convert and replace a.txt.  Convert and replace b.txt. Convert d.txt and write to f.txt.

	      dos2unix -n c.txt e.txt -o a.txt b.txt -n d.txt f.txt

DIAGNOSTICS

BUGS

       The program does not work properly under MSDOS in stdio processing mode.  If you know why is that so, please tell me.

AUTHORS

       Benjamin Lin - <blin@socs.uts.edu.au>

       Bernd Johannes Wuebben (mac2unix mode) <wuebben@kde.org>

MISCELLANY

       Tested environment:

	      Linux 1.2.0 with GNU C 2.5.8

	      SunOS 4.1.3 with GNU C 2.6.3

	      MS-DOS 6.20 with Borland C++ 4.02

       Suggestions and bug reports are welcome.

SEE ALSO

       unix2dos(1) mac2unix(1)

1995.03.31							   dos2unix v3.0						       dos2unix(1)
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