Visit Our UNIX and Linux User Community


use of regex on grep


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers use of regex on grep
# 1  
Old 09-30-2004
use of regex on grep

having a look on the regex site I saw that characters can be search using hex values
http://www.regular-expressions.info/characters.html

So I try to use it whith grep to find a on a string (octal Decimal Hexa : 350 232 E8) but it doesn't work

E.g.
/usr/bin/echo '\0350' | egrep '\xE8'

I tried with grep and egrep, POSIX one's and Solaris one's --> no luck
Any idea?
Thx
 

Previous Thread | Next Thread
Test Your Knowledge in Computers #918
Difficulty: Medium
Unix time is a single signed number which increments every millisecond.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Grep regex

Hi everyone, I'm looking for a grep command to match the following pattern from a file: <EGS>10234567<EGS> I used this following command to do this: grep -E '^<EGS>{8}<EGS>' test.txt In output I got: <EGS>10234567<EGS> Till now it work, but if I add something at the end of the line... (2 Replies)
Discussion started by: Arnaudh78
2 Replies

2. UNIX for Beginners Questions & Answers

Grep in regex

Hello guys, Here i am writing a script in bash to check for a valid URL from a file using regex This is my input file http://www.yahoo.commmmmm http://www.google.com https://www.gooogle.co www.test6.co.in www.gmail.com www.google.co htt://www.money.com http://eeeess.google.com... (2 Replies)
Discussion started by: Meeran Rizvi
2 Replies

3. Shell Programming and Scripting

Grep with regex containing one string but not the other

Hi to you all, I'm just struggling with a regex problem and I'm pretty sure that I'm missing sth obvious... :confused: I need a regex to feed my grep in order to find lines that contain one string but not the other. Here's the data example: 2015-04-08 19:04:55,926|xxxxxxxxxx| ... (11 Replies)
Discussion started by: stresing
11 Replies

4. Shell Programming and Scripting

grep -v and regex

How to match lines that don't contain a patern in regex it self, without using the -v option of grep? (15 Replies)
Discussion started by: vistastar
15 Replies

5. UNIX for Dummies Questions & Answers

| help | unix | grep (GNU grep) 2.5.1 | advanced regex syntax

Hello, I'm working on unix with grep (GNU grep) 2.5.1. I'm going through some of the newer regex syntax using Regular Expression Reference - Advanced Syntax a guide. ls -aLl /bin | grep "\(x\)" Which works, just highlights 'x' where ever, when ever. I'm trying to to get (?:) to work but... (4 Replies)
Discussion started by: MykC
4 Replies

6. Shell Programming and Scripting

regex and grep

I want it to find lines that contain any number of capital letters before P this is what I have tried echo "AAAAAP" | grep 'P' echo "AAAAAP" | grep '\{1\}P' echo "AAAAAP" | grep '^*P' But none of them seem to work, any help is much appreciated thanks Calypso (4 Replies)
Discussion started by: Calypso
4 Replies

7. Shell Programming and Scripting

grep and regex question

basically i have a csv i parse through. a user will supply me with a san switch he/she wants more info about... say the name is "pnj-sansw124" now i can grep out every connection to that switch w/o issue because this sans switch pnj-sansw124 has multiple slots 1-10. and it looks like this in the... (5 Replies)
Discussion started by: pupp
5 Replies

8. UNIX for Dummies Questions & Answers

Help with grep and regex

Hi all, I'm a beginner with linux, regex, grep, etc I am trying to get data out of a file that has about 13,000 lines in this format name - location I want to grep all the names out to one file and the locations to another so I can put them into a spreadsheet. Some have hyphenated... (14 Replies)
Discussion started by: raichlea
14 Replies

9. UNIX for Dummies Questions & Answers

grep with Regex help!

Hello everybody, I'd like to know how is it I should write a regex in unix to match a string not followed by another string (anywhere in the line). To be more specific, I want to find lines where "drop table" is found, but not followed anywhere in the line by the character "&". For... (3 Replies)
Discussion started by: mvalonso
3 Replies

10. Shell Programming and Scripting

grep regex problem

Hi, I am trying to do something with grep, but for some reason I just can't get it to to work. I am looking for find a match in the second field, the length must be 10 characters and end with 'abc'. The file is in this format: <int><tab><field2> I've tried a few patterns, some work,... (2 Replies)
Discussion started by: iceman
2 Replies
regex(1F)							   FMLI Commands							 regex(1F)

NAME
regex - match patterns against a string SYNOPSIS
regex [-e] [ -v "string"] [ pattern template] ... pattern [template] DESCRIPTION
The regex command takes a string from the standard input, and a list of pattern / template pairs, and runs regex() to compare the string against each pattern until there is a match. When a match occurs, regex writes the corresponding template to the standard output and returns TRUE. The last (or only) pattern does not need a template. If that is the pattern that matches the string, the function simply returns TRUE. If no match is found, regex returns FALSE. The argument pattern is a regular expression of the form described in regex(). In most cases, pattern should be enclosed in single quotes to turn off special meanings of characters. Note that only the final pattern in the list may lack a template. The argument template may contain the strings $m0 through $m9, which will be expanded to the part of pattern enclosed in ( ... )$0 through ( ... )$9 constructs (see examples below). Note that if you use this feature, you must be sure to enclose template in single quotes so that FMLI does not expand $m0 through $m9 at parse time. This feature gives regex much of the power of cut(1), paste(1), and grep(1), and some of the capabilities of sed(1). If there is no template, the default is $m0$m1$m2$m3$m4$m5$m6$m7$m8$m9. OPTIONS
The following options are supported: -e Evaluates the corresponding template and writes the result to the standard output. -v "string" Uses string instead of the standard input to match against patterns. EXAMPLES
Example 1: Cutting letters out of a string To cut the 4th through 8th letters out of a string (this example will output strin and return TRUE): `regex -v "my string is nice" '^.{3}(.{5})$0' '$m0'` Example 2: Validating input in a form In a form, to validate input to field 5 as an integer: valid=`regex -v "$F5" '^[0-9]+$'` Example 3: Translating an environment variable in a form In a form, to translate an environment variable which contains one of the numbers 1, 2, 3, 4, 5 to the letters a, b, c, d, e: value=`regex -v "$VAR1" 1 a 2 b 3 c 4 d 5 e '.*' 'Error'` Note the use of the pattern '.*' to mean "anything else". Example 4: Using backquoted expressions In the example below, all three lines constitute a single backquoted expression. This expression, by itself, could be put in a menu defini- tion file. Since backquoted expressions are expanded as they are parsed, and output from a backquoted expression (the cat command, in this example) becomes part of the definition file being parsed, this expression would read /etc/passwd and make a dynamic menu of all the login ids on the system. `cat /etc/passwd | regex '^([^:]*)$0.*$' ' name=$m0 action=`message "$m0 is a user"`'` DIAGNOSTICS
If none of the patterns match, regex returns FALSE, otherwise TRUE. NOTES
Patterns and templates must often be enclosed in single quotes to turn off the special meanings of characters. Especially if you use the $m0 through $m9 variables in the template, since FMLI will expand the variables (usually to "") before regex even sees them. Single characters in character classes (inside []) must be listed before character ranges, otherwise they will not be recognized. For exam- ple, [a-zA-Z_/] will not find underscores (_) or slashes (/), but [_/a-zA-Z] will. The regular expressions accepted by regcmp differ slightly from other utilities (that is, sed, grep, awk, ed, and so forth). regex with the -e option forces subsequent commands to be ignored. In other words, if a backquoted statement appears as follows: `regex -e ...; command1; command2` command1 and command2 would never be executed. However, dividing the expression into two: `regex -e ...``command1; command2` would yield the desired result. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
awk(1), cut(1), grep(1), paste(1), sed(1), regcmp(3C), attributes(5) SunOS 5.10 12 Jul 1999 regex(1F)

Featured Tech Videos