Help with A script Post: 302595020

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Homework and Emergencies Homework & Coursework Questions Help with A script Post 302595020 by balajesuri on Wednesday 1st of February 2012 11:56:29 PM

02-02-2012

Registered User

Quote:

Originally Posted by Aldaron47

Code:

if ( test $# -eq 4)
echo "Enter 4 files"
read $1 $2 $3 $4
then
touch $2
touch $3
otuch $4
cp $1 $2
cp $1 $3
cp $1 $4
else echo " Need exactly four parameters, sorry. "
fi

1. The lines which I've coloured red are contradictory. $1, $2, $3.... are positional parameters. You can't read values into them that way.
2. Your requirement was to create directories, not files, right? touch is used to change a file's access and modification time. If file doesn't exist, it creates them.
3. Try the below script. Let us know if you have any questions.
4. Please use code tags.

Code:

$ cat test.sh
#! /bin/bash

echo "Enter 4 dir names (1st is source. Next 3 are target dirs): "
read a b c d

for x in $b $c $d
do
    if [ ! -d $x ]
    then
        mkdir $x
        cp -r ./$a/* ./$x/
    else
        cp -r ./$a/* ./$x/
    fi
done
$
$ ./test.sh
Enter 4 dir names (1st is source. Next 3 are target dirs):
test test1 test2 test3
$
$ ls -l
drw-r--r-- 3 root root   4096 Jan 24 06:27 test
drwxr-xr-x 3 root root   4096 Feb  2 04:55 test1
drwxr-xr-x 3 root root   4096 Feb  2 04:55 test2
drwxr-xr-x 3 root root   4096 Feb  2 04:55 test3

'test' was an already existing dir. test1, test2, test3 are newly created dirs, which contains all of the data contained in 'test'

balajesuri

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execute

EXECUTE(7)						  PostgreSQL 9.2.7 Documentation						EXECUTE(7)

NAME

       EXECUTE - execute a prepared statement

SYNOPSIS

       EXECUTE name [ ( parameter [, ...] ) ]

DESCRIPTION

       EXECUTE is used to execute a previously prepared statement. Since prepared statements only exist for the duration of a session, the
       prepared statement must have been created by a PREPARE statement executed earlier in the current session.

       If the PREPARE statement that created the statement specified some parameters, a compatible set of parameters must be passed to the EXECUTE
       statement, or else an error is raised. Note that (unlike functions) prepared statements are not overloaded based on the type or number of
       their parameters; the name of a prepared statement must be unique within a database session.

       For more information on the creation and usage of prepared statements, see PREPARE(7).

PARAMETERS

       name
	   The name of the prepared statement to execute.

       parameter
	   The actual value of a parameter to the prepared statement. This must be an expression yielding a value that is compatible with the data
	   type of this parameter, as was determined when the prepared statement was created.

OUTPUTS

       The command tag returned by EXECUTE is that of the prepared statement, and not EXECUTE.

EXAMPLES

       Examples are given in the EXAMPLES section of the PREPARE(7) documentation.

COMPATIBILITY

       The SQL standard includes an EXECUTE statement, but it is only for use in embedded SQL. This version of the EXECUTE statement also uses a
       somewhat different syntax.

SEE ALSO

       DEALLOCATE(7), PREPARE(7)

PostgreSQL 9.2.7						    2014-02-17								EXECUTE(7)