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Top Forums Shell Programming and Scripting Use positional parameters in loop / while syntax in whiptail Post 303021915 by annacreek on Monday 20th of August 2018 01:12:24 PM
Old 08-20-2018
Here is partial solution for b item.

I need to take a very hard look at the whiptail - "choice" is the key.
The attached code "loops" thru all checked sections in checklist - they are all even positioning

parameters and there is no need to recheck that.



Code:
echo "START read all positionining parameters" 
pause
 while read choice
 do
 echo $choice
 echo "@line $LINENO"
 pause 
 echo "process command $LINENO" 
 $choice
 pause      # wiil not wait for keyboard 
 done < results
 echo "END read all positionining parameters" 
pause

 

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pause(3)						     Library Functions Manual							  pause(3)

NAME
pause - Suspends a process until it receives a signal LIBRARY
Standard C Library (libc.so, libc.a) SYNOPSIS
#include <unistd.h> int pause( void ); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: pause(): POSIX.1, XPG4, XPG4-UNIX Refer to the standards(5) reference page for more information about industry standards and associated tags. DESCRIPTION
The pause() function suspends the calling process until it receives a signal whose action is either to execute a signal-catching function or terminate the process. The signal must be one that is acknowledged by the calling process. The pause() function does not affect the action taken when a signal is received. The pause() function suspends the calling process by suspending the calling thread. Other threads in the process, if any, are not sus- pended. RETURN VALUES
When the received signal causes the calling process to terminate, the pause() function does not return. When the signal is caught by the calling process and control is returned from the signal-catching function, the calling thread resumes exe- cution from the point of suspension. At that point, the pause() function returns a value of -1 and sets errno to indicate the error. ERRORS
The pause() function sets errno to the specified values for the following conditions: The signal has been caught by the calling process and control has been returned from the signal-catching function. RELATED INFORMATION
Functions: kill(2), sigaction(2), sigvec(2), wait(2) Routines: alarm(3) Standards: standards(5) delim off pause(3)
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