$- parameter ...


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers $- parameter ...
# 1  
Question $- parameter ...

I have an excert from the Rute Tutorial and Expo by paul sheer... about parameters.. so far I have understood most of them .. except this one:
"$-
Expands to the current option flags as specified upon invocation, by the set builtin command, or those set by the shell itself (such as the -i option)." (by paul sheer Author of Rute Tutorial and Expo).....
when I excute this command on the command line I get this;
echo $-
himBH
if any could clarify this it would greatly be appreciated.. .
moxxx68

Last edited by moxxx68; 02-10-2005 at 07:19 PM..
# 2  
$- is used to show current shell options (in Bash, Korn and others)... These can be options passed during the shells invocation (i.e. when the shell is first started), or set whilst the shell is running with the "set" command. For example....

$ echo $-
himBH
$ set -x
$ echo $-
himxBH
$ set +x
$ echo $-
himBH
$ bash -r # start another shell with -r set
$ echo $-
himrBH
$ exit
$ echo $-
himBH

Read the manual page for the shell you're using and take a look at the "set" section and also the invocation options section.

I check the value of $- in my .kshrc file to make sure that it is executed for interactive shells only.

Cheers
ZB
# 3  
thanx moxxx68.....
cheers.
 

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #869
Difficulty: Medium
Fortran introduced the concept of automatic garbage collection.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Use parameter expansion over a parameter expansion in bash.

Hello All, Could you please do help me here as I would like to perform parameter expansion in shell over a parameter expansion. Let's say I have following variable. path="/var/talend/nat/cdc" Now to get only nat I could do following. path1="${path%/*}" path1="${path1##*/}" Here... (8 Replies)
Discussion started by: RavinderSingh13
8 Replies

2. Shell Programming and Scripting

Call Script with Parameter (that has another parameter)

Hi. How do I achieve this sh /EDWH-DMT02/script/MISC/exec_sql.sh "@/EDWH-DMT02/script/others/CSM_CKC/Complete_List.sql ${file_name}" Complete_List.txt The /EDWH-DMT02/script/MISC/exec_sql.sh has two parameters and it's working fine with this sh /EDWH-DMT02/script/MISC/exec_sql.sh... (7 Replies)
Discussion started by: aimy
7 Replies

3. Shell Programming and Scripting

Resolving a parameter which is passed as parameter

Hi, I have the following files. ->cat scr.sh export TMP_DIR=/home/user/folder1 export TMP_DIR_2=/home/user/folder2 while read line do cat "$line" done<file_list.dat ------------------------ -> cat file_list.dat $TMP_DIR/file1.txt $TMP_DIR_2/file2.txt --------------------------- -> cat... (6 Replies)
Discussion started by: barath
6 Replies

4. Shell Programming and Scripting

How to get the parameter value from the parameter file in perl?

hi all, i have a parameter file of following format, i want a method which can get the value of specific parameter. parameter file format: <Parameter Name="FileLocationWindows"> <Description> The directory location of the logger file. ... (1 Reply)
Discussion started by: laxmikant.hcl
1 Replies

5. Shell Programming and Scripting

Passing parameter to script, and split the parameter

i am passing input parameter 'one_two' to the script , the script output should display the result as below one_1two one_2two one_3two if then echo " Usage : <$0> <DATABASE> " exit 0 else for DB in 1 2 3 do DBname=`$DATABASE | awk -F "_" '{print $1_${DB}_$2}` done fi (5 Replies)
Discussion started by: only4satish
5 Replies

6. Shell Programming and Scripting

Command that takes one parameter and then searches for the passed in parameter

Hi I am looking for a unix command or a small shell script which can takes one parameter and then searches for the passed in the parameter in any or all files under say /home/dev/ Can anyone please help me on this? (3 Replies)
Discussion started by: pankaj80
3 Replies

7. UNIX for Dummies Questions & Answers

how to get $1 parameter in ~/.bashrc

Hi, i am trying to convert windows path to linux and do some action on equivalent mounted one for the same in linux. echo '\\server1\source\path\needed_files' | sed -e 's!\\!/!g' | sed -e 's!^//!/!' | sed -e 's!\(/server1/source/path\)\(.*\)!/home/$USER/mount/server1\2!'output: ... (5 Replies)
Discussion started by: greet_sed
5 Replies

8. Shell Programming and Scripting

use $1 parameter

Hi, I have a script and I'm passing in a parmeter $1, and I only what to pass this $1 parmeter into another script. Please see below for details for help : virtual_gateway="$1" YYYYMMDD="`date +%Y%m%d`" ... (7 Replies)
Discussion started by: venhart
7 Replies

9. Shell Programming and Scripting

how do I make dynamic parameter names? Or get the value of a parameter evaluated twi

Say I write something like the following: var1=1 var2=2 for int in 1 2 do echo "\$var$int" done I want the output to be: 1 2 Instead I get something like: $var1 $var2 (2 Replies)
Discussion started by: Awanka
2 Replies

10. Shell Programming and Scripting

parameter

I need to pass a filename parameter in shell script and then need to validate same name in the folder, Can any one help what would be piece of code to do so. Lets folder is a and file with a is test.dat and i want to pass this parameter against the file name file_name and then want to compare... (5 Replies)
Discussion started by: u263066
5 Replies

Featured Tech Videos