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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 302926341 by derekludwig on Sunday 23rd of November 2014 01:34:37 PM
Old 11-23-2014
Wizard,

Just to confirm, using RS="" was to read in stanzas - groups of lines separated by blank lines. Or are you trying to read in the entire file at once? The latter is what you are trying to do with:
Code:
cat test.txt | xargs |sed -e 's/ //g' > test2.txt

which really should be:
Code:
tr -d '\n' < test.txt > test2.txt

This is because xargs will join the lines of text until the maximum number of arguments or maximum command line length is reached.
Perl's file slurping may be useful here:
Code:
perl -e '$/ = undef; $\ = "\n"; $, = " "; $_ = <>; s{\s+}{}g; push @X, pos while m{jkl}gi; print @X;'

which generates:
Code:
11 20 23 30 38 69 80 92 99 107 121 132

for the followig input file:
Code:
AAAAAGHI
JKLAjKMEFJK
LjklABCDJkLEFGHIJKL

ZZAjdskljfdAAAAGHI
ldjkflfsdkJKLAjKMEFJK
jklfsdkjfsdLjklABCDJkLEFGHIJKL

dAAAAGHI
ldkJKLAjKMEFJK
jklfklAB

---------- Post updated at 01:34 PM ---------- Previous update was at 01:31 PM ----------

Or if you don't mind each indice being on a separate line, this is slightly simpler:
Code:
perl -e '$/ = undef; $\ = "\n"; $_ = <>; s{\s+}{}g; print pos while m{jkl}gi;'

 

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LEARN ABOUT REDHAT

unix2dos

unix2dos(1)						      General Commands Manual						       unix2dos(1)

NAME

       unix2dos - UNIX to DOS text file format converter

SYNOPSYS

       unix2dos [options] [-c convmode] [-o file ...] [-n infile outfile ...]

       Options:

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

DESCRIPTION

       This manual page documents unix2dos, the program that converts text files in UNIX format to DOS 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 unix2dos 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.

	      unix2dos

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

	      unix2dos a.txt b.txt

	      unix2dos -o a.txt b.txt

       Convert and replace a.txt in ASCII conversion mode.  Convert and replace b.txt in ISO conversion mode.

	      unix2dos a.txt -c iso b.txt

	      unix2dos -c ascii a.txt -c iso b.txt

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

	      unix2dos -k a.txt

	      unix2dos -k -o a.txt

       Convert a.txt and write to e.txt.

	      unix2dos -n a.txt e.txt

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

	      unix2dos -k -n a.txt e.txt

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

	      unix2dos a.txt -n b.txt e.txt

	      unix2dos -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.

	      unix2dos -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.

AUTHOR

       Benjamin Lin - ( blin@socs.uts.edu.au )

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

       dos2unix(1)

1995.03.31							   unix2dos v2.2						       unix2dos(1)
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