The condition Iam trying to achieve is similar to the below.
Your code won't work. You are providing a regular expression, but the == operator expects a glob pattern. You could either use the regexp operator (=~) or write your pattern as a glob-pattern:
Hi all,
i have a command named "vmchange" and i must use it for thousands of data which must be changed.
For example,
vmchange -m N0001
vmchange -m N0002
vmchange -m N0003
...
...
vmchange -m N0100
How can i do that in awk or bash script?
Any help would be greatly appreciated..
... (5 Replies)
Hi guys, I am working on a server where there are many users. The user names end in a 1 or a 2. I want to write a bash script that will say which users are in which group and was wondering if I could get some help. The only part I am unsure of is how to check if it ends in the number.
Here's... (2 Replies)
How do I check that a string $AA22CC3 starts with the "$" symbol ?
I have tried :
checksum='$AAB3E45'
echo $checksum
case $checksum in
$* ) echo success ;
esac
Thanks ... (4 Replies)
Hello,
Trying to iterate over set of file in current directory and check if the file name in that folder matches certain string. This is what I have so far. Here I am checking if the file name starts with nexus, if so echo file name to log file.
Getting weird syntax errors. Any help is... (7 Replies)
example:
comment Now_TB.table column errac is for error messages
1 - first
2 - second
3 -third ;
in this example I need to be able to grab the comment as first word and ; as the last word and it might span a few lines. I need it to be put all in one line without line breaks so I can... (4 Replies)
I have this below string in a variable
cutString=21222222222222222122222222222222
this string is nothing but hex values depicted as below
21:22:22:22:22:22:22:22:21:22:22:22:22:22:22:22
so what i want to achieve is swap the lower order with higher order values in the... (3 Replies)
data file contains
failed=24
error=23
error=163
failed=36
error=903
i need to get a total count of each value above. i'm looking for the most efficient method to do this as the datafile i provided is just a sample. the actual data can be several hundred thousands of lines.
so from... (3 Replies)
This is on a CentOS box, I have two scripts that need to run in order.
I want to write a shell script that calls the first script, lets it run and then terminates it after a certain number of hours (that I specify of course), and then calls the second script (they can't run simultaneously) which... (3 Replies)
Hi,
I have a process that generates strings.
I would like to check each string and search for substring which contains the letter 'E' surrounded by numbers (both sides of the letter 'E').
few examples:
AA4E7012A2 - contains E surrounded by numbers
FE18274012 - does not contain E... (3 Replies)
Discussion started by: yanive
3 Replies
LEARN ABOUT REDHAT
switch
switch(n) Tcl Built-In Commands switch(n)
__________________________________________________________________________________________________________________________________________________NAME
switch - Evaluate one of several scripts, depending on a given value
SYNOPSIS
switch ?options? string pattern body ?pattern body ...?
switch ?options? string {pattern body ?pattern body ...?}
_________________________________________________________________DESCRIPTION
The switch command matches its string argument against each of the pattern arguments in order. As soon as it finds a pattern that matches
string it evaluates the following body argument by passing it recursively to the Tcl interpreter and returns the result of that evaluation.
If the last pattern argument is default then it matches anything. If no pattern argument matches string and no default is given, then the
switch command returns an empty string.
If the initial arguments to switch start with - then they are treated as options. The following options are currently supported:
-exact Use exact matching when comparing string to a pattern. This is the default.
-glob When matching string to the patterns, use glob-style matching (i.e. the same as implemented by the string match command).
-regexp When matching string to the patterns, use regular expression matching (as described in the re_syntax reference page).
-- Marks the end of options. The argument following this one will be treated as string even if it starts with a -.
Two syntaxes are provided for the pattern and body arguments. The first uses a separate argument for each of the patterns and commands;
this form is convenient if substitutions are desired on some of the patterns or commands. The second form places all of the patterns and
commands together into a single argument; the argument must have proper list structure, with the elements of the list being the patterns
and commands. The second form makes it easy to construct multi-line switch commands, since the braces around the whole list make it unnec-
essary to include a backslash at the end of each line. Since the pattern arguments are in braces in the second form, no command or vari-
able substitutions are performed on them; this makes the behavior of the second form different than the first form in some cases.
If a body is specified as ``-'' it means that the body for the next pattern should also be used as the body for this pattern (if the next
pattern also has a body of ``-'' then the body after that is used, and so on). This feature makes it possible to share a single body among
several patterns.
Beware of how you place comments in switch commands. Comments should only be placed inside the execution body of one of the patterns, and
not intermingled with the patterns.
Below are some examples of switch commands:
switch abc a - b {format 1} abc {format 2} default {format 3}
will return 2,
switch -regexp aaab {
^a.*b$ -
b {format 1}
a* {format 2}
default {format 3}
}
will return 1, and
switch xyz {
a
-
b
{
# Correct Comment Placement
format 1
}
a*
{format 2}
default
{format 3}
}
will return 3.
SEE ALSO
for(n), if(n), regexp(n)
KEYWORDS
switch, match, regular expression
Tcl 7.0 switch(n)