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Full Discussion: Create Dynamic if condition
Top Forums Shell Programming and Scripting Create Dynamic if condition Post 302943641 by wahi80 on Monday 11th of May 2015 11:45:45 AM
Old 05-11-2015
Create Dynamic if condition
Create Dynamic If condition

Hi,
I have a file color.txt which has data as shown below
Code:
Red
Blue
Green
Yellow
White
Pink
Black

Based on a variable I execute a tail command as shown below
Code:
tail -${LEFT_OVR} color.txt

LEFT_OVR can be any number less than count of number of lines in a file

so if LEFT_OVR=2, then output would be
Code:
Pink
Black

Based on output of tail command I need to build a dynamic If condition, which will look something like this

Code:
if [ "$color" = "Pink" ] || [ "$color" = "Black" ]

I'm planning to do something like this
Code:
tail -${LEFT_OVR} color.txt > tail_out
one_line=`awk 'BEGIN { ORS = " " } { print }' tail_out`

COND=""
for c in $one_line
do
COND="[ color = $c ] $COND"
done

Next I would check for occurrence of ] [ and replace with ] || [

Any ideas if there is something easier to achieve similar result?
Last edited by rbatte1; 05-11-2015 at 12:55 PM.. Reason: CODE tags for output
 

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LEARN ABOUT OSF1

tis_cond_destroy

tis_cond_destroy(3)					     Library Functions Manual					       tis_cond_destroy(3)

NAME

       tis_cond_destroy - Destroys the specified condition variable.

LIBRARY

       Standard C Library (libc.so, libc.a)

SYNOPSIS

       #include <tis.h>

       int tis_cond_destroy(
			  pthread_cond_t  *cond);

STANDARDS

       None

PARAMETERS

       Address of the condition variable (passed by reference) to be destroyed.

DESCRIPTION

       This routine destroys the condition variable specified by cond.	After this routine is called, DECthreads may reclaim internal storage used
       by the condition variable object. Call this routine when a condition variable will no longer be referenced.

       The results of this routine are unpredictable if the condition variable specified in cond does not exist or is not initialized.

       For more information about actions when threads are present, refer to the pthread_cond_destroy(3) description.

RETURN VALUES

       If an error condition occurs, this routine returns an integer value indicating the type of error.  Possible return values are  as  follows:
       Successful  completion.	 The  object  being  referenced  by  cond  is  being  referenced  by  another  thread  that is currently executing
       tis_cond_wait(3) on the condition variable specified in cond.  (This error can only occur when threads are present.)  The  value  specified
       by cond is not a valid condition variable.

ERRORS

       None

RELATED INFORMATION

       Functions: tis_cond_broadcast(3), tis_cond_init(3), tis_cond_signal(3), tis_cond_wait(3)

       Manuals: Guide to DECthreads and Programmer's Guide

       delim off

															       tis_cond_destroy(3)
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