Sponsored Content
Full Discussion: Pipe to awk to variable
Top Forums Shell Programming and Scripting Pipe to awk to variable Post 302551759 by Corona688 on Wednesday 31st of August 2011 01:42:06 PM
Old 08-31-2011
Quote:
Originally Posted by al0x
But I need awk to cut the string (since cut can only handle 1 char)
Smilie I didn't even mention cut.

What makes you think you need awk to cut the string? There's powerful shell builtins to handle things like that -- like read, which I illustrated. Running awk, cut, sed, grep etc. in backticks all the time to do one line is probably a mistake.

Perhaps you should post your entire script? I suspect there's lots that can be optimized. Please also explain what your system is and what shell you use.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Is it better to grep and pipe to awk, or to seach with awk itself

This may just be a lack of experience talking, but I always assumed that when possible it was better to use a commands built in abilities rather than to pipe to a bunch of commands. I wrote a (very simple) script a while back that was meant to pull out a certain error code, and report back what... (4 Replies)
Discussion started by: DeCoTwc
4 Replies

2. Shell Programming and Scripting

Assign command (with pipe) output to a variable

Hi , I would like to assign command (with pipe) output to a variable. The code is as follows. The goal of the code is to get the last folder folder with a particular name pattern. myDate=`ls | grep 2009 | tail -1` echo "myDate=" $myDate However, in the presence of the pipe, the code... (3 Replies)
Discussion started by: jeff_cen
3 Replies

3. Shell Programming and Scripting

Trying to embed a pipe with a variable IN a variable

Hey all, I've tried this for quite some time now and haven't figured it out... I was hoping one of you shell scripters could help a newbie out :) I am trying to take the 1st parameter of my script and use it as the search pattern for my for loop #!/usr/bin/sh set -vx REGEX=$1 ... (3 Replies)
Discussion started by: Keepcase
3 Replies

4. Shell Programming and Scripting

a pipe within a variable

Hi, I am trying to run this command: ED_CMD="$Access_OPS $ED_Logs_Dir/access | $lgrep -v $Access_Err" $lgrep $ED_CMD However, i am getting an error "Failed to open |: Broken pipe at " My question is how to put a pipe within a variable. Thanks. John. (4 Replies)
Discussion started by: john_prince
4 Replies

5. Shell Programming and Scripting

using awk for setting variable but change the output of this variable within awk

Hi all, Hope someone can help me out here. I have this BASH script (see below) My problem lies with the variable path. The output of the command find will give me several fields. The 9th field is the path. I want to captured that and the I want to filter this to a specific level. The... (6 Replies)
Discussion started by: Cowardly
6 Replies

6. Shell Programming and Scripting

help with sed or awk with less pipe

<tr><th align=right valign=top>Faulty_Part</th><td align=left valign=top>readhat version 6.0</td></tr> <tr><th align=right valign=top>Submit_Date</th><td align=left valign=top>2011-04-28 02:08:02</td></tr> .......(a long string) I want to get all the field between "left valign=top>" and "... (2 Replies)
Discussion started by: yanglei_fage
2 Replies

7. Shell Programming and Scripting

awk print pipe

Hey fellas, I wrote an script which its output is like this: a 1 T a 1 T a 2 A b 5 G b 5 G b 5 G I wanna print $1 $2 and the total number of $2 value as the third column and after that $3. Sth like this: a 1 2 T a 2 1 A b 5 3 G I know how to do it with a given input... (4 Replies)
Discussion started by: @man
4 Replies

8. Shell Programming and Scripting

BOTH pipe and file(s) into awk

Hello all, quick question: is it possible to pass input into AWK BOTH with a pipe AND a file at the same time, something like this: command .......|awk '.................' FILEIN > fileout All I read says either one or the other, not both, is it at all possible? And how would the... (2 Replies)
Discussion started by: gio001
2 Replies

9. Shell Programming and Scripting

awk pipe to sort

In the below awk to add a sort by smallest to largest should it be added after the END? Thank you :). BEGIN { FS="*" } # Read search terms from file1 into 's' FNR==NR { s next } { # Check if $5 matches one of the search terms for(i in s) { if($5 ~ i) { ... (4 Replies)
Discussion started by: cmccabe
4 Replies

10. UNIX for Beginners Questions & Answers

Help on passing an input variable to the voronota program (after third pipe)

Dear UNIX forum members, I am using macbook pro 13 (2015 edition) with MAC OS Mojave and am trying to write the shell script where when it is run through terminal it asks for an input (in the code below an input variable is domains) and then that input becomes capital letter or letters which... (3 Replies)
Discussion started by: Aurimas
3 Replies
cut(1)								   User Commands							    cut(1)

NAME
cut - cut out selected fields of each line of a file SYNOPSIS
cut -b list [-n] [file]... cut -c list [file]... cut -f list [-d delim] [-s] [file]... DESCRIPTION
Use the cut utility to cut out columns from a table or fields from each line of a file; in data base parlance, it implements the projection of a relation. The fields as specified by list can be fixed length, that is, character positions as on a punched card (-c option) or the length can vary from line to line and be marked with a field delimiter character like TAB (-f option). cut can be used as a filter. Either the -b, -c, or -f option must be specified. Use grep(1) to make horizontal ``cuts'' (by context) through a file, or paste(1) to put files together column-wise (that is, horizontally). To reorder columns in a table, use cut and paste. OPTIONS
The following options are supported: list A comma-separated or blank-character-separated list of integer field numbers (in increasing order), with optional - to indi- cate ranges (for instance, 1,4,7; 1-3,8; -5,10 (short for 1-5,10); or 3- (short for third through last field)). -b list The list following -b specifies byte positions (for instance, -b1-72 would pass the first 72 bytes of each line). When -b and -n are used together, list is adjusted so that no multi-byte character is split. -c list The list following -c specifies character positions (for instance, -c1-72 would pass the first 72 characters of each line). -d delim The character following -d is the field delimiter (-f option only). Default is tab. Space or other characters with special meaning to the shell must be quoted. delim can be a multi-byte character. -f list The list following -f is a list of fields assumed to be separated in the file by a delimiter character (see -d ); for instance, -f1,7 copies the first and seventh field only. Lines with no field delimiters will be passed through intact (useful for table subheadings), unless -s is specified. -n Do not split characters. When -b list and -n are used together, list is adjusted so that no multi-byte character is split. -s Suppresses lines with no delimiter characters in case of -f option. Unless specified, lines with no delimiters will be passed through untouched. OPERANDS
The following operands are supported: file A path name of an input file. If no file operands are specified, or if a file operand is -, the standard input will be used. USAGE
See largefile(5) for the description of the behavior of cut when encountering files greater than or equal to 2 Gbyte (2^31 bytes). EXAMPLES
Example 1 Mapping user IDs A mapping of user IDs to names follows: example% cut -d: -f1,5 /etc/passwd Example 2 Setting current login name To set name to current login name: example$ name=`who am i | cut -f1 -d' '` ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of cut: LANG, LC_ALL, LC_CTYPE, LC_MES- SAGES, and NLSPATH. EXIT STATUS
The following exit values are returned: 0 All input files were output successfully. >0 An error occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |CSI |Enabled | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
grep(1), paste(1), attributes(5), environ(5), largefile(5), standards(5) DIAGNOSTICS
cut: -n may only be used with -b cut: -d may only be used with -f cut: -s may only be used with -f cut: cannot open <file> Either file cannot be read or does not exist. If multiple files are present, processing continues. cut: no delimiter specified Missing delim on -d option. cut: invalid delimiter cut: no list specified Missing list on -b, -c, or -f option. cut: invalid range specifier cut: too many ranges specified cut: range must be increasing cut: invalid character in range cut: internal error processing input cut: invalid multibyte character cut: unable to allocate enough memory SunOS 5.11 29 Apr 1999 cut(1)
All times are GMT -4. The time now is 08:17 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy