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Full Discussion: awk to change value in field according to another
Top Forums Shell Programming and Scripting awk to change value in field according to another Post 303027230 by bakunin on Tuesday 11th of December 2018 09:41:34 PM
Old 12-11-2018
Quote:
Originally Posted by cmccabe
Code:
#!/bin/sh
awk -v d=$# '   # does this define d as non-zero

$# is the number of arguments a script actually got when it was invoked. Thry this script:

Code:
#! /bin/bash
echo number of arguments is: $#
exit 0

and try the following invocations, note their results:

Code:
./script.sh
./script.sh one
./script.sh one two
./script.sh one "two two" three
./script.sh ""

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
cmccabe
 

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LEARN ABOUT SUNOS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a	Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.10							    30 Jan 2004 							 script(1)
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