06-11-2015
Quote:
Originally Posted by
Peasant
Check out man test
Hope that helps
Regards
Peasant.
The test man page says absolutely nothing about how the
[[ expr ]] compound command behaves in various shells. In some shells,
[[ is an unknown command; in others it is a keyword in the syntax for that shell. There is a huge difference between the way a shell handles an unquoted
$* when arguments are part of the shell's syntax versus when arguments are being parsed as arguments for a utility to be invoked (even if it is a built-in utility as in the case of
test and
[).
10 More Discussions You Might Find Interesting
1. Programming
Hi,
Please clear the 2 questions,
2 Questions,
1) Why the new as a operator? Is there any special reason why it can't be a function like malloc?
2) How are we considering sizeof(),new are as a opearartors? I know + - * / -> , . etc.. are operators, which criteria satisfied by sizeof()... (4 Replies)
Discussion started by: Nagapandi
4 Replies
2. UNIX for Dummies Questions & Answers
hi
i am using the below code
grep -v '^$' file1.lst >file1.lst
but it gives file1.lst already exists.
And i want to over rite on the same file
Whats the work around? (5 Replies)
Discussion started by: jathin12
5 Replies
3. Shell Programming and Scripting
Hi,
I'm new to UNIX, at least shell programming and am having trouble figuring out a problem i'm having. In one section in my nested if statement, i want the program to test if the file does not exist, based on an argument supplied at the command line by the user. What i have is
elif ; then... (3 Replies)
Discussion started by: rowlf
3 Replies
4. Shell Programming and Scripting
I'm almost pulling out my hair trying to figure out what's wrong with this... there's no reason I can see that it shouldn't be working. It seems that the code acts as though the conditional statement is true no matter what - I've even tried removing the negation operator, but it always goes into... (5 Replies)
Discussion started by: wildbluefaerie
5 Replies
5. Shell Programming and Scripting
I have a string of commands I am piping some data through and I want to allow command line switches to select which commands are used. I want to do something like this: OPTION="| command3"
command1 -a -b c.txt | command2 -d -e $OPTION >result.txt
I want to do it that way because OPTION may be... (1 Reply)
Discussion started by: KenJackson
1 Replies
6. UNIX for Dummies Questions & Answers
All,
THe below is my script , when i use this i am getting nothing . could any one help me to know what is the use of the << operator below
su - $8 << supo
echo "exportsph $2 $1 $3 $4"
exportsph $2 $1 $3 $4
supo
i also tried as individual command su - userid << supo , when i do... (3 Replies)
Discussion started by: arunkumar_mca
3 Replies
7. UNIX for Dummies Questions & Answers
im new to bash scripting and im just using online tutorials and trial and error. i wanted to write a script to read numbers from a file and find their sum:
#!/bin/bash
theSum=0
for line in $(cat numbers.txt)
do
let "theSum = theSum + $line"
echo "$line"
done
echo "The sum is... (3 Replies)
Discussion started by: astrolux444
3 Replies
8. Shell Programming and Scripting
Hi,
I would like to ask if someone know how to test a files if exist the file is a nfs mount ufsdump archive file..
i used the test operator -f -a h almost all test operator but i failed
file1=ufs_root_image.dump
|| echo "files doesn't exist && exit 1
the false file1 is working but... (0 Replies)
Discussion started by: jao_madn
0 Replies
9. Shell Programming and Scripting
Please show me how to make substitution over the contents of a file in a perl script.
In a perl script, the core part of substitution operation is
s/FINDPATTERN/REPLACEPATTERN/g;
However, I cannot figure out how to make the substitution occur over the contents of a file. The following... (3 Replies)
Discussion started by: LessNux
3 Replies
10. Shell Programming and Scripting
Hello all, I have two files which are cmd and disk.
`$cat cmd
lsdev | grep -iw`
`$cat disk
hdisk2`
Now I want to use the contents of both the files in a way such that `lsdev | grep -iw` command works for hdisk2 when I write the following script:
`!#/bin/sh
cmd1="$( sed -n... (4 Replies)
Discussion started by: ravi.trivedi
4 Replies
LEARN ABOUT SUSE
alter_operator
ALTER
OPERATOR(7) SQL Commands ALTER OPERATOR(7)
NAME
ALTER OPERATOR - change the definition of an operator
SYNOPSIS
ALTER OPERATOR name ( { lefttype | NONE } , { righttype | NONE } ) OWNER TO newowner
DESCRIPTION
ALTER OPERATOR changes the definition of an operator. The only currently available functionality is to change the owner of the operator.
You must own the operator to use ALTER OPERATOR. To alter the owner, you must also be a direct or indirect member of the new owning role,
and that role must have CREATE privilege on the operator's schema. (These restrictions enforce that altering the owner doesn't do anything
you couldn't do by dropping and recreating the operator. However, a superuser can alter ownership of any operator anyway.)
PARAMETERS
name The name (optionally schema-qualified) of an existing operator.
lefttype
The data type of the operator's left operand; write NONE if the operator has no left operand.
righttype
The data type of the operator's right operand; write NONE if the operator has no right operand.
newowner
The new owner of the operator.
EXAMPLES
Change the owner of a custom operator a @@ b for type text:
ALTER OPERATOR @@ (text, text) OWNER TO joe;
COMPATIBILITY
There is no ALTER OPERATOR statement in the SQL standard.
SEE ALSO
CREATE OPERATOR [create_operator(7)], DROP OPERATOR [drop_operator(7)]
SQL - Language Statements 2010-05-14 ALTER OPERATOR(7)