Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

A way to use test for "$x" = [a-z] (regex)

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting A way to use test for "$x" = [a-z] (regex)
# 1  
Old 12-15-2007
A way to use test for "$x" = [a-z] (regex)
In bourne, I was hoping to do:

if test "$x" = [a-z]

but even when x equals "q" (not with quotes) test returns 1.

Is there a way to do this?
# 2  
Old 12-15-2007
For regular expressions I normally use case....

Code:
case "$x" in
[a-z] )
        echo lowercase
        ;;
* )
        echo not lowercase
        ;;
esac

# 3  
Old 12-15-2007
Thanks. I'll try that
# 4  
Old 12-15-2007
Hmm, how do I create a regular expression for NOT [a-z]? In Bourne, [^a-z] gave me an error message:

expr: unmatched [ or [^

The ultimate goal is to test that $x is one character, no more no less, and is [a-z]
# 5  
Old 12-15-2007
Really easy:

Code:
case "$x" in
  [a-z]) echo "I don't want this because it's lowercase";;
  * ) echo "Yippee! It's not lowercase";;
esac

Smilie
# 6  
Old 12-15-2007
Quote:
create a regular expression for ...
You're using globbing, not regular expressions Smilie
# 7  
Old 12-15-2007
Quote:
Originally Posted by radoulov
You're using globbing, not regular expressions Smilie
Isn't globbing to do with filenames?
Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. AIX

Apache 2.4 directory cannot display "Last modified" "Size" "Description"

Hi 2 all, i have had AIX 7.2 :/# /usr/IBMAHS/bin/apachectl -v Server version: Apache/2.4.12 (Unix) Server built: May 25 2015 04:58:27 :/#:/# /usr/IBMAHS/bin/apachectl -M Loaded Modules: core_module (static) so_module (static) http_module (static) mpm_worker_module (static) ... (3 Replies)
Discussion started by: penchev
3 Replies

2. Shell Programming and Scripting

Bash script - Print an ascii file using specific font "Latin Modern Mono 12" "regular" "9"

Hello. System : opensuse leap 42.3 I have a bash script that build a text file. I would like the last command doing : print_cmd -o page-left=43 -o page-right=22 -o page-top=28 -o page-bottom=43 -o font=LatinModernMono12:regular:9 some_file.txt where : print_cmd ::= some printing... (1 Reply)
Discussion started by: jcdole
1 Replies

3. UNIX for Dummies Questions & Answers

Using "mailx" command to read "to" and "cc" email addreses from input file

How to use "mailx" command to do e-mail reading the input file containing email address, where column 1 has name and column 2 containing “To” e-mail address and column 3 contains “cc” e-mail address to include with same email. Sample input file, email.txt Below is an sample code where... (2 Replies)
Discussion started by: asjaiswal
2 Replies

4. Shell Programming and Scripting

Shc : trying to test functionality "test" compiling but can not execute

I am testing shc to see if it would help with my need. Im at a point where Im trying to compile and test the "test.ksh" file that comes in the tar ball : shc-3.8.9> shc -v -r -f test.ksh shc shll=ksh shc =-c shc =exec '%s' "$@" shc = shc opts= shc: cc test.ksh.x.c -o test.ksh.x... (7 Replies)
Discussion started by: popeye
7 Replies

5. UNIX for Dummies Questions & Answers

What is the significance of sh -s in ssh -qtt ${user}@${host} "sh -s "${version}"" < test.sh?

Please can you help me understand the significance of providing arguments under sh -s in > ssh -qtt ${user}@${host} "sh -s "${version}"" < test.sh (4 Replies)
Discussion started by: Sree10
4 Replies

6. Shell Programming and Scripting

grep regex, match exact string which includes "/" anywhere on line.

I have a file that contains the 2 following lines (from /proc/mounts) /dev/sdc1 /mnt/backup2 xfs rw,relatime,attr2,noquota 0 0 /dev/sdb1 /mnt/backup xfs rw,relatime,attr2,noquota 0 0 I need to match the string in the second column exactly so that only one result is returned, e.g. > grep... (2 Replies)
Discussion started by: jelloir
2 Replies

7. Shell Programming and Scripting

Test command with "-z" and "-n"

Hello all, Please let me know, why the value of $? is diff for -z and -n. And explain what are the operends we can use with "test" and their purpose.. $ test -z "" $ echo $? 0 $ test -n "" $ echo $? 1 Thanx in advance.. (2 Replies)
Discussion started by: divya bandipotu
2 Replies

8. Shell Programming and Scripting

awk command to replace ";" with "|" and ""|" at diferent places in line of file

Hi, I have line in input file as below: 3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL My expected output for line in the file must be : "1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL" Can someone... (7 Replies)
Discussion started by: shis100
7 Replies

9. UNIX for Dummies Questions & Answers

Explain the line "mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`"

Hi Friends, Can any of you explain me about the below line of code? mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'` Im not able to understand, what exactly it is doing :confused: Any help would be useful for me. Lokesha (4 Replies)
Discussion started by: Lokesha
4 Replies
Login or Register to Ask a Question