"if" is obvious.
"[" means the same as the command "test" as in here:-
And "-d" is to denote that a directory/drawer/folder is the thing to look for.
"$drawer" could be any absolute or relative path.
The braces "{}" in my first reply are not doing anything in my original case but can
be used for special expansion conditions. (Added for fullness.)
And also I forgot, "]" ends that particular test proceedure...
I will let you research on the curly braces... ;o)
Last edited by wisecracker; 02-08-2014 at 11:55 AM..
Reason: Added the "forgot" bit...
This User Gave Thanks to wisecracker For This Post:
Hi all,
I am a newbe to aix 5.2. I want to specify the characters used by users while creating user in aix like specifying the length of the password
should i use some sript for that if it is then please let me know how to do this
if yes give me the link for the scripts.
Thanks in advance
... (2 Replies)
hi all,
I'm trying to resolve a scenario where we prompt the user to enter 1 or more disk names.
From there we would run a command on each disk which would give its location.
This would allow us to create a list of disks at location A, a list of disks at location B,....etc...
Any help... (1 Reply)
I have list of files named file_username_051208_025233.log. Here 051208 is the date and 025233 is the time.I have to run thousands of files daily.I want to put all the files depending on the date of running into a date directory.Suppose if we run files today they should put into 05:Dec:08... (3 Replies)
So I have a loop that stated if a directory exists or not. If it does it prints the number of files within that directory. I use this code...
result=`(ls -l . | egrep -c '^-')`
However, no matter which directory I input, it outputs the number "2"
What is wrong here? (4 Replies)
I need to make a shell script that accepts a directory input by the user. The program searches for the directory and finds if it exists or not. Then if it does exist, it outputs the number of files within that directory. Here's what I have so far.
result=
echo "Please input a directory:... (5 Replies)
Hi,
echo "Enter file name of input file list along with absolute path : "
read inputFileList
if
then
for string in `cat inputFileList`
do
echo $string
done
else
echo " file does not exist"
fi
From the above code, if the user enters a invalid file... (1 Reply)
i have a script which takes input from user, if user gives either Y/y then it should continue, else it should quit by displaying user cancelled.
#!/bin/sh
echo " Enter your choice to continue y/Y OR n/N to quit "
read A
if
then
echo " user requested to continue "
##some commands... (7 Replies)
Hi I'm trying to create a basic script that pauses for user input to verify a file name before generating the output.
I have numerous SSL certificate files which I am trying to determine the expiry date so what I'm trying to do is write a script so that is pauses to request the name of the .pem... (9 Replies)
I am trying to allow a user to enter in text and then store that text in a variable $gene to run in an awk command in which those values are used to run some calculations. I am getting syntax errors however, when I try. Thank you :).
The awk runs great if it is a pre-defined file that is used,... (7 Replies)
Hi Experts,
Need your support
Redhat 6.5
I want to create a user with all(read, write, execute) privileges except that user should not be able to create any new user from his login
to perform any task. (10 Replies)
Discussion started by: as7951
10 Replies
LEARN ABOUT OSX
while
while(n) Tcl Built-In Commands while(n)
__________________________________________________________________________________________________________________________________________________NAME
while - Execute script repeatedly as long as a condition is met
SYNOPSIS
while test body
_________________________________________________________________DESCRIPTION
The while command evaluates test as an expression (in the same way that expr evaluates its argument). The value of the expression must a
proper boolean value; if it is a true value then body is executed by passing it to the Tcl interpreter. Once body has been executed then
test is evaluated again, and the process repeats until eventually test evaluates to a false boolean value. Continue commands may be exe-
cuted inside body to terminate the current iteration of the loop, and break commands may be executed inside body to cause immediate termi-
nation of the while command. The while command always returns an empty string.
Note: test should almost always be enclosed in braces. If not, variable substitutions will be made before the while command starts execut-
ing, which means that variable changes made by the loop body will not be considered in the expression. This is likely to result in an
infinite loop. If test is enclosed in braces, variable substitutions are delayed until the expression is evaluated (before each loop iter-
ation), so changes in the variables will be visible. For an example, try the following script with and without the braces around $x<10:
set x 0
while {$x<10} {
puts "x is $x"
incr x
}
EXAMPLE
Read lines from a channel until we get to the end of the stream, and print them out with a line-number prepended:
set lineCount 0
while {[gets $chan line] >= 0} {
puts "[incr lineCount]: $line"
}
SEE ALSO
break(n), continue(n), for(n), foreach(n)
KEYWORDS
boolean value, loop, test, while
Tcl while(n)