Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Checking for certain characters
Top Forums UNIX for Advanced & Expert Users Checking for certain characters Post 302215788 by Diabolist on Thursday 17th of July 2008 07:25:00 AM
Old 07-17-2008
The input file:

Code:
$ cat ttt
ID .... VALUE
-------------
A001 .... 100
C003 .... 800
B002 .... 200
corrupt
data
A004 .... 300
C003 .... 800
foo .... bar

The script:
Code:
#!/bin/ksh

INPUT=ttt

{ while read LINE
do
  echo $LINE |egrep "^A|^B" > /dev/null 2>&1
  if [ $? -eq 0 ]
  then
    echo "Processing $LINE"
  else
    echo "Skipping $LINE"
  fi
done } < $INPUT

The output:
Code:
$ ./ttt.ksh
Skipping ID .... VALUE
Skipping -------------
Processing A001 .... 100
Skipping C003 .... 800
Processing B002 .... 200
Skipping corrupt
Skipping data
Processing A004 .... 300
Skipping C003 .... 800
Skipping foo .... bar

You could do a single string of commands using awk for the pattern matching, but I'm not sure how you want to process the line once you verify it's good... so this may offer the most flexibility.

Let us know if you need anything in the script explained.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Ksh Checking if string has 2 characters and does not contain digits?

How could I check if a string variable contains at least (or only) 2 characters, and check and make sure that the string does not contain any numeric digits?...I need to know how to do this as simple as possible. and I am using the Ksh shell. Thanks. (1 Reply)
Discussion started by: developncode
1 Replies

2. Shell Programming and Scripting

How to replace characters with random characters

I've got a file (numbers.txt) filled with numbers and I want to replace each one of those numbers with a new random number between 0 and 9. This is my script so far: #!/bin/bash rand=$(($RANDOM % 9)) sed -i s//$rand/g numbers.txtThe problem that I have is that it replaces each number with just... (2 Replies)
Discussion started by: hellocatfood
2 Replies

3. Shell Programming and Scripting

Help with checking that 2 variables contain matching characters

hi i am writing a hangman script and am having trouble checking the correct letters against the word i need the script to compare the word against the letters guessed that are correct so once all the letters within the word have been guessed it will alow me to create a wining senario eg ... (3 Replies)
Discussion started by: lsecer
3 Replies

4. Shell Programming and Scripting

Replace special characters with Escape characters?

i need to replace the any special characters with escape characters like below. test!=123-> test\!\=123 !@#$%^&*()-= to be replaced by \!\@\#\$\%\^\&\*\(\)\-\= (8 Replies)
Discussion started by: laknar
8 Replies

5. Shell Programming and Scripting

sed replacing specific characters and control characters by escaping

sed -e "s// /g" old.txt > new.txt While I do know some control characters need to be escaped, can normal characters also be escaped and still work the same way? Basically I do not know all control characters that have a special meaning, for example, ?, ., % have a meaning and have to be escaped... (11 Replies)
Discussion started by: ijustneeda
11 Replies

6. SCO

Stop boot system at "Checking protected password and checking subsystem databases"

Hi, (i'm sorry for my english) I'm a problem on boot sco unix 5.0.5 open server. this stop at "Checking protected password and checking subsystem databases" (See this image ) I'm try this: 1) http://www.digipedia.pl/usenet/thread/50/37093/#post37094 2) SCO: SCO Unix - Server hangs... (9 Replies)
Discussion started by: buji
9 Replies

7. Shell Programming and Scripting

Checking a pattern in file and the count of characters

I am having a zipped file which has the following URL contents - 98.70.217.222 - - "GET /liveupdate-aka.symantec.com/1340071490jtun_nav2k8enn09m25.m25?h=abcdefgh HTTP/1.1" 200 159229484 "-" "hBU1OhDsPXknMepDBJNScBj4BQcmUz5TwAAAAA" "-" In this line here is we only need to consider the... (4 Replies)
Discussion started by: Naks_Sh10
4 Replies

8. Shell Programming and Scripting

awk - checking last three characters

Hello, I am working with some very large files (upwards of 1M records). I have written code to parse out a lot of the data and am using awk rather than a built-in "while read LINE" for performance (I have tested both ways). That said, I now need to read each of these incoming lines, check the ninth... (2 Replies)
Discussion started by: dagamier
2 Replies

9. Shell Programming and Scripting

Checking the user input in perl for characters and length

My question is basically as the title says. How can I check a user inputted string is only certain characters long (for example, 3 characters long) and how do I check a user inputted string only contains certain characters (for example, it should only contain the characters 'u', 'a', 'g', and 'c')... (4 Replies)
Discussion started by: Eric1
4 Replies

10. Shell Programming and Scripting

Outputting characters after a given string and reporting the characters in the row below --sed

I have this fastq file: @M04961:22:000000000-B5VGJ:1:1101:9280:7106 1:N:0:86 GGGGGGGGGGGGCATGAAAACATACAAACCGTCTTTCCAGAAATTGTTCCAAGTATCGGCAACAGCTTTATCAATACCATGAAAAATATCAACCACACCA +test-1 GGGGGGGGGGGGGGGGGCCGGGGGFF,EDFFGEDFG,@DGGCGGEGGG7DCGGGF68CGFFFGGGG@CGDGFFDFEFEFF:30CGAFFDFEFF8CAF;;8... (10 Replies)
Discussion started by: Xterra
10 Replies

LEARN ABOUT HPUX

pdp11

machid(1)						      General Commands Manual							 machid(1)

NAME

       machid: hp9000s200, hp9000s300, hp9000s400, hp9000s500, hp9000s700, hp9000s800, hp-mc680x0, hp-pa, pdp11, u370, u3b, u3b10, u3b2, u3b5, vax
       - provide truth value about processor type

SYNOPSIS

DESCRIPTION

       The following commands return a true value (exit code 0) if the a processor type matches the command name.  Otherwise a false  value  (exit
       code  nonzero)  is returned.  These commands are commonly used within makefiles and shell procedures to improve portability of applications
       (see make(1)).

				       +-----------+-------------------------++--------+--------------------------+
				       |Command    | True for		     ||Command | True for		  |
				       +-----------+-------------------------++--------+--------------------------+
				       |hp9000s200 | Series 200 	     ||pdp11   | PDP-11/45 or PDP-11/70   |
				       |hp9000s300 | Series 300 	     ||u3b     | 3B20 computer		  |
				       |hp9000s400 | Series 400 	     ||u3b2    | 3B2 computer		  |
				       |hp9000s500 | Series 500 	     ||u3b5    | 3B5 computer		  |
				       |hp9000s700 | Series 700 	     ||u3b10   | 3B10 computer		  |
				       |hp9000s800 | Series 800 or 700	     ||u370    | IBM System/370 computer  |
				       |hp-mc680x0 | Series 200, 300, or 400 ||vax     | VAX-11/750 or VAX-11/780 |
				       |hp-pa	   | Series 700 or 800	     ||        |			  |
				       +-----------+-------------------------++--------+--------------------------+
EXAMPLES

       Given a shell script that must behave differently when run on an HP 9000 Series 700 or 800 system, select the correct code  segment  to	be
       executed:

WARNINGS

       always  returns	true on both Series 800 and Series 700 systems.  Therefore, when using this command in scripts to determine hardware type,
       always use both and in the appropriate sequence to ensure correct results (see

       machid(1) will no longer provide support for future machines beyond the Series 800 and Series 700 systems.  Decisions should  be  based	on
       the hardware and software configuration information returned by getconf(1).

SEE ALSO

       getconf(1), make(1), sh(1), test(1), true(1).

																	 machid(1)
All times are GMT -4. The time now is 03:17 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy