Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: awk variable into shell command "date -d": possible...?
Top Forums Shell Programming and Scripting awk variable into shell command "date -d": possible...? Post 303018654 by Scrutinizer on Tuesday 12th of June 2018 04:02:35 PM
Old 06-12-2018
Or, to show how it can be done within awk itself:
Code:
awk 'BEGIN{v=2; cmd="date -d \"now + " v " weeks\""; cmd | getline newdate; close(cmd); print newdate}'

The way of quoting is different than in shell..

Or if you put it in a file file.awk:
Code:
BEGIN {
  v=2
  cmd="date -d 'now + " v " weeks'"
  cmd | getline newdate
  close(cmd)
  print newdate
}

Code:
awk -f file.awk

Last edited by Scrutinizer; 06-12-2018 at 05:10 PM..
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Explain the line "mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`"

Hi Friends, Can any of you explain me about the below line of code? mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'` Im not able to understand, what exactly it is doing :confused: Any help would be useful for me. Lokesha (4 Replies)
Discussion started by: Lokesha
4 Replies

2. Shell Programming and Scripting

cat $como_file | awk /^~/'{print $1","$2","$3","$4}' | sed -e 's/~//g'

hi All, cat file_name | awk /^~/'{print $1","$2","$3","$4}' | sed -e 's/~//g' Can this be done by using sed or awk alone (4 Replies)
Discussion started by: harshakusam
4 Replies

3. UNIX for Dummies Questions & Answers

Command Character size limit in the "sh" and "bourne" shell

Hi!!.. I would like to know what is maximum character size for a command in the "sh" or "bourne" shell? Thanks in advance.. Roshan. (1 Reply)
Discussion started by: Roshan1286
1 Replies

4. UNIX for Advanced & Expert Users

Command Character size limit in the "sh" and "bourne" shell

Hi!!.. I would like to know what is maximum character size for a command in the "sh" or "bourne" shell? Thanks in advance.. Roshan. (1 Reply)
Discussion started by: Roshan1286
1 Replies

5. Shell Programming and Scripting

Command Character size limit in the "sh" and "bourne" shell

Hi!!.. I would like to know what is maximum character size for a command in the "sh" or "bourne" shell? Thanks in advance.. Roshan. (1 Reply)
Discussion started by: Roshan1286
1 Replies

6. Shell Programming and Scripting

awk command to replace ";" with "|" and ""|" at diferent places in line of file

Hi, I have line in input file as below: 3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL My expected output for line in the file must be : "1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL" Can someone... (7 Replies)
Discussion started by: shis100
7 Replies

7. Shell Programming and Scripting

Using external "date" command from awk

For some dumb reason, I'm having the strangest hard time getting awk to convert epoch time to UTC human time. I'm using CentOS 5.5 and gawk 3.1.5. There are 2 approaches that I know. First, the strftime call: Tandy400 $ echo 1308607169 | awk '{print strftime("%c",$1)}' Mon 20 Jun 2011... (3 Replies)
Discussion started by: treesloth
3 Replies

8. Shell Programming and Scripting

Variable interpolation in "print" of awk command

Hi, I have a snippet like below. Based on variable i, i wish to print 1,2,3,4,5th columns to Sample files. For each loop, one column from contetn and results will be pused to sample files. But i have a problem here i=1 while ; do `awk -F"\t" '{print $($i)}' $content > Sample_${i}_original`;... (4 Replies)
Discussion started by: forums123456
4 Replies

9. UNIX for Dummies Questions & Answers

Using "mailx" command to read "to" and "cc" email addreses from input file

How to use "mailx" command to do e-mail reading the input file containing email address, where column 1 has name and column 2 containing “To” e-mail address and column 3 contains “cc” e-mail address to include with same email. Sample input file, email.txt Below is an sample code where... (2 Replies)
Discussion started by: asjaiswal
2 Replies

10. Shell Programming and Scripting

awk "date" and "system" command

Hello experts! I need your help please I have a file.txt of which I want to extract 3rd and 4th columns with date with the form e.g.: 2016-11-25 03:14:50and pass them to "date" command, but also append the 9th column in a file as well. So I want to execute date -d '2016-11-25 03:14:50' ... (2 Replies)
Discussion started by: phaethon
2 Replies

LEARN ABOUT LINUX

shtool-path

SHTOOL-PATH.TMP(1)					      GNU Portable Shell Tool						SHTOOL-PATH.TMP(1)

NAME

       shtool-path - GNU shtool command dealing with shell path variables

SYNOPSIS

       shtool path [-s|--suppress] [-r|--reverse] [-d|--dirname] [-b|--basename] [-m|--magic] [-p|--path path] str [str ...]

DESCRIPTION

       This command deals with shell $PATH variables. It can find a program through one or more filenames given by one or more str arguments.  It
       prints the absolute filesystem path to the program displayed on "stdout" plus an exit code of 0 if it was really found.

OPTIONS

       The following command line options are available.

       -s, --suppress
	   Supress output. Useful to only test whether a program exists with the help of the return code.

       -r, --reverse
	   Transform a forward path to a subdirectory into a reverse path.

       -d, --dirname
	   Output the directory name of str.

       -b, --basename
	   Output the base name of str.

       -m, --magic
	   Enable advanced magic search for ""perl"" and ""cpp"".

       -p, --path path
	   Search in path. Default is to search in $PATH.

EXAMPLE

	#   shell script
	awk=`shtool path -p "${PATH}:." gawk nawk awk`
	perl=`shtool path -m perl`
	cpp=`shtool path -m cpp`
	revpath=`shtool path -r path/to/subdir`

HISTORY

       The GNU shtool path command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 1998 for Apache. It was later taken
       over into GNU shtool.

SEE ALSO

       shtool(1), which(1).

18-Jul-2008							   shtool 2.0.8 						SHTOOL-PATH.TMP(1)
All times are GMT -4. The time now is 12:55 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy