Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Replace hex values using sed command
Top Forums UNIX for Advanced & Expert Users Replace hex values using sed command Post 303011179 by drysdalk on Sunday 14th of January 2018 07:07:50 PM
Old 01-14-2018
Hi,

Hmm, unusual. Can you check one more thing please ? What's the current value of the LANG (and possibly also LC_ALL) environment variable ? if your current locale isn't actually set to a UTF-8 locale, that might explain some of these problems. Either that, or the utilities on the system you're on just can't handle UTF-8 properly at all. I'm having no issues with this at all on my Linux box, so it could always be something Solaris-specific also. If I get the chance I'll try to test it on a SunOS-style box this evening if I can.

---------- Post updated 15-01-18 at 12:07 AM ---------- Previous update was 14-01-18 at 09:42 PM ----------

Hi,

OK, think I might have a SunOS-based solution for you here. Caveat: this was tested on Tribblix, an open-source Illumos based version of Solaris, so it's SunOS-like, but not official "proper" (or paid-for, more to the point) Oracle Solaris. But it should be compatible enough for almost any purpose.

So, the answer I found was to use octal rather than hex. Try this:

Code:
root@tribblix:~/test# cat test.txt
Á
root@tribblix:~/test# file test.txt
test.txt:       data
root@tribblix:~/test# cat test.txt | sed 's/\301/A/g' > test2.txt
root@tribblix:~/test# cat test2.txt
A
root@tribblix:~/test# file test2.txt
test2.txt:      ascii text
root@tribblix:~/test#

It's possible there's a little-endian-versus-big-endian byte order issue with the hex substitution, so rather than try to get my head around that I thought to try to octal, and that seems to do the job. Let us know how you get on.
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Modifying binary file by editing Hex values ?

Hi , i'm using special binary file (lotus notes) and modifying an hexadecimal address range with windows hex editor and it works fine ! The file is an AIX one and i'm forced to transfert (ftp) it before modifying it and re-transfert ! NOW i would do this directly under AIX ! I can... (4 Replies)
Discussion started by: Nicol
4 Replies

2. Shell Programming and Scripting

How do i use sed to replace string with values from a dictionary file

I have file 1 with one million rows. one of the fields is "FIRSTNAME" (the string) I have a second file with about 20 first names. JUDE DAVID HOMER CANE ABEL MARTY CARL SONNY STEVE BERT OSCAR MICKY JAMES JOHN GLENN DOUG (3 Replies)
Discussion started by: yoyolandre
3 Replies

3. Shell Programming and Scripting

Loop with sed command to replace line with sed command in it

Okay, title is kind of confusion, but basically, I have a lot of scripts on a server that I need to replace a ps command, however, the new ps command I'm trying to replace the current one with pipes to sed at one point. So now I am attempting to create another script that replaces that line. ... (1 Reply)
Discussion started by: cbo0485
1 Replies

4. UNIX for Dummies Questions & Answers

using sed to replace values...

I have a file: $somevar=somevalue $anothervar= $someothervar=45 I'd like to be able to replace the values in the file. I just don't know how exactly to use sed. I was thinking along the lines of: cat file | sed "s/$somevar=/anotherval/g" I was hoping this would make the... (2 Replies)
Discussion started by: mrwatkin
2 Replies

5. Shell Programming and Scripting

Replace blank values for string using sed

Hi everyone, I was wondering how could from a file where each row is separated by tabulations, the row values where are in blank replace them by a string or value. My file has this form: 26/01/09 13:45:00 0 0 26/01/09 14:00:00 1495.601318 0 26/01/09 14:15:00 1495.601318 0 ... (4 Replies)
Discussion started by: tonet
4 Replies

6. Programming

searching files for hex or oct values

I have a set of files without extensions. How can I programatically tell if a file is in gzip format? The gzip file format spec RFC 1952 GZIP File Format Specification version 4.3 states that gzip files have certain hex/oct values at the beginning of the file. 1st byte = 0x1f in hex,... (2 Replies)
Discussion started by: daflore
2 Replies

7. Shell Programming and Scripting

Convert hex values to displayable characters

Hi, I am a bit stuck with displaying characters. I am having values like below in the proper displayable characters. which I would want to print the actual value on the right hand side. I dont want to create an array because I would have to create 255 different values. isnt there another way of... (17 Replies)
Discussion started by: ahmedwaseem2000
17 Replies

8. Shell Programming and Scripting

sed replace values of column with ordered numbering

Hello, I am trying to write a shell script that will create a gnuplot file. My main problem is that I have a data file with two columns: 1.05929120E+09 5.0000701214792 1.05930096E+09 5.00006386985764 1.05930584E+09 5.00019465404908 1.05931072E+09 5.00031960589719 ... (2 Replies)
Discussion started by: pau
2 Replies

9. Shell Programming and Scripting

Help search and replace hex values only in specific files

perl -pi -e 's/\x00/\x0d\x0a/g' `grep -l $'GS' filelist` This isn't working :confused:, it's not pulling the files that contain the regex. Please help me rewrite this :wall:. Ideally for this to work on 9K of 20K files in the directory, I've tried this but I don't know enough about awk... (7 Replies)
Discussion started by: verge
7 Replies

10. Shell Programming and Scripting

How to replace with "sed" some hex values by other hex values?

Assume I have a file \usr\home\\somedir\myfile123.txt and I want to replace all occurencies of the two (concatenated) hex values x'AD' x'A0' bytwo other (concatenated) hex values x'20' x'6E' How can I achieve this with the gnu sed tool? Additional question: Is there a way to let sed show... (1 Reply)
Discussion started by: pstein
1 Replies

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)
All times are GMT -4. The time now is 11:18 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy