is possible to pass shell (bash) variable to sed like it is in awk?
example:
awk script is storred in awk.awk file and I am passing variable called var to this file.
so it works when i issue
Is possible to do similar thing to sed ?
$res should be number of line which sed will be applied to
$name should be some replace string
so i will run it like
Thank you
---------- Post updated at 09:42 AM ---------- Previous update was at 09:41 AM ----------
If is not this possible what is your favorite way to pass bash variables to sed ?
I wanted to try this way because sed program could be stored in separate file (so it would not be need to use " and so avoiding escaping and white space interpretation)
Thank you
Hi there. If variables are named inside of a ksh script, how is it possible to pass these to sed?
The affected portion of my script goes something like this:
A=`cut -d. -f1 $FILE`
B=`cut -d. -f2 $FILE`
C=`cut -d. -f3 $FILE`
sed 's/1111/$A/g;s/2222/$B/g;s/3333/$C/g' file > anotherfile
... (2 Replies)
i would like to pass a variable to awk wherein the variable comes from external loop.
i tried this...
let x=0
until test $x -eq 32
do
cat file | awk '{ print $1 , "Number" , $($x) }' >> output
done
thanks, (4 Replies)
I am trying to pass 2 shell variable's ("START" and "END") define earlier in the script to this awk statement, but i can't seem to pass it on. PLs help.
set START = xxxx
set END = yyyy
set selected_file = `awk '/$START/,/$END/' filename` (24 Replies)
I have an awk statement where I Need to pass an environment variable but I cannot get it to work:
My evironment varible examples below:
$FILE1=/dev/fs/file.new
$FILE2=/dev/fs/file.old
Code below:
awk -F"|" '
BEGIN {
while( getline < "$FILE1" )
{ arr=1 }
}
arr != 1 { print }
'... (12 Replies)
Hi, Thanks for looking,,,,
(kornshell)
tmp3 is a list of line numbers
I want to print the lines from my list
code:
while read j
do
echo $j #works fine
echo $filename #works fine
#sed "'$jp'" "$filename" ... (7 Replies)
Hello,
I'd like to pass a variable to a sed command in a perl script. The script is like this :
#!/usr/bin/perl -w
$newline="new";
system q(sed '/insert/ i\ '$newline <sed1.txt >sed2.txt);
But the interpretor wouldn't recognize $newline, it inserts a "\n" instead.
I've also... (4 Replies)
I'm trying to store the response from a nawk command inside of a ksh script. The command is:
text=$(nawk -F: '$1 ~ /${imgArray}/ {print $2}' ${etcDir}/captions.txt)
From what I can tell, the imgArray variable is not being expanding when it is inside the single quote ('). Is there something I... (4 Replies)
Does anyone know of a way to do something similar to this with awk and kill? I want to create the variable in awk and pass that variable to kill.
ps -ef | grep -i chromium | awk '{$2=x}' | kill -9 $x 2>/dev/null (9 Replies)
Hi all,
Hereby wish to have your advise for below:
Main concept is
I intend to get current directory of my script file.
This script file will be copied to /etc/init.d.
A string in this copy will be replaced with current directory value.
Below is original script file:
... (6 Replies)
num=10
sed -n '$num p' test.txt
sed -n '10 p' test.txt works
however i am putting the sed command in a loop and the line number is not static
Can someone please help me how to achive this. (1 Reply)
Discussion started by: figure20012
1 Replies
LEARN ABOUT MINIX
regex
regex(1F) FMLI Commands regex(1F)NAME
regex - match patterns against a string
SYNOPSIS
regex [-e] [ -v "string"] [ pattern template] ... pattern [template]
DESCRIPTION
The regex command takes a string from the standard input, and a list of pattern / template pairs, and runs regex() to compare the string
against each pattern until there is a match. When a match occurs, regex writes the corresponding template to the standard output and
returns TRUE. The last (or only) pattern does not need a template. If that is the pattern that matches the string, the function simply
returns TRUE. If no match is found, regex returns FALSE.
The argument pattern is a regular expression of the form described in regex(). In most cases, pattern should be enclosed in single quotes
to turn off special meanings of characters. Note that only the final pattern in the list may lack a template.
The argument template may contain the strings $m0 through $m9, which will be expanded to the part of pattern enclosed in ( ... )$0 through
( ... )$9 constructs (see examples below). Note that if you use this feature, you must be sure to enclose template in single quotes so
that FMLI does not expand $m0 through $m9 at parse time. This feature gives regex much of the power of cut(1), paste(1), and grep(1), and
some of the capabilities of sed(1). If there is no template, the default is $m0$m1$m2$m3$m4$m5$m6$m7$m8$m9.
OPTIONS
The following options are supported:
-e Evaluates the corresponding template and writes the result to the standard output.
-v "string" Uses string instead of the standard input to match against patterns.
EXAMPLES
Example 1: Cutting letters out of a string
To cut the 4th through 8th letters out of a string (this example will output strin and return TRUE):
`regex -v "my string is nice" '^.{3}(.{5})$0' '$m0'`
Example 2: Validating input in a form
In a form, to validate input to field 5 as an integer:
valid=`regex -v "$F5" '^[0-9]+$'`
Example 3: Translating an environment variable in a form
In a form, to translate an environment variable which contains one of the numbers 1, 2, 3, 4, 5 to the letters a, b, c, d, e:
value=`regex -v "$VAR1" 1 a 2 b 3 c 4 d 5 e '.*' 'Error'`
Note the use of the pattern '.*' to mean "anything else".
Example 4: Using backquoted expressions
In the example below, all three lines constitute a single backquoted expression. This expression, by itself, could be put in a menu defini-
tion file. Since backquoted expressions are expanded as they are parsed, and output from a backquoted expression (the cat command, in this
example) becomes part of the definition file being parsed, this expression would read /etc/passwd and make a dynamic menu of all the login
ids on the system.
`cat /etc/passwd | regex '^([^:]*)$0.*$' '
name=$m0
action=`message "$m0 is a user"`'`
DIAGNOSTICS
If none of the patterns match, regex returns FALSE, otherwise TRUE.
NOTES
Patterns and templates must often be enclosed in single quotes to turn off the special meanings of characters. Especially if you use the
$m0 through $m9 variables in the template, since FMLI will expand the variables (usually to "") before regex even sees them.
Single characters in character classes (inside []) must be listed before character ranges, otherwise they will not be recognized. For exam-
ple, [a-zA-Z_/] will not find underscores (_) or slashes (/), but [_/a-zA-Z] will.
The regular expressions accepted by regcmp differ slightly from other utilities (that is, sed, grep, awk, ed, and so forth).
regex with the -e option forces subsequent commands to be ignored. In other words, if a backquoted statement appears as follows:
`regex -e ...; command1; command2`
command1 and command2 would never be executed. However, dividing the expression into two:
`regex -e ...``command1; command2`
would yield the desired result.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO awk(1), cut(1), grep(1), paste(1), sed(1), regcmp(3C), attributes(5)SunOS 5.10 12 Jul 1999 regex(1F)