Read variable inputs Post: 302789903

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Cannot read in variable using read on first try

Hi, My problem is : echo Division read vDivision variable1=`cut -c **something****' echo Do you want to proceed ? read ans I cant seem to read in ans on the first try and have to repeatedly enter the return key. If i remove the ` ` statement its ok but i need that line for...

2. UNIX for Dummies Questions & Answers

Cant read in variable on first try

3. Shell Programming and Scripting

read n number of inputs

Hello, I think its a sinple query but somehow i m stucked up here... I am trying to enter n number of inputs from the user and write them in an input file ie row wise... I tried standard commands like $echo "enter the inputs for the file" $read var1 var2 var3 var4 test1 test2...

4. Programming

Handling variable inputs

Hi, Is there any way to handle variable inputs. If an application handles more than one input how to print the input values. Example : ./a.out 1 "hi" 3 ./a.out 1 ./a.out 1 3 4 "hello" output should be: 1 hi 3 1

5. Shell Programming and Scripting

read several inputs and if none input set to 9999

need a script that goes something like this #!/usr/bin/bash echo "input up to TEN values, separated by spaces" read vari1 vari2 vari3 vari4 vari5 vari6 vari7 vari8 vari9 vari10 #set null variables to 9999 (somehow?) #now echo all variables echo $vari1 $vari2 $vari3 $vari4 $vari5 $vari6...

6. Shell Programming and Scripting

How to read inputs from a file

Hello; Please I need to read inputs from a file change 1 or 2 things the output to another file.

7. Programming

Using ioctl to read mice inputs

I was wondering if its possible to read mouse inputs using ioctl functions somehow ? If it is not too much of trouble can anyone write or even direct me to sample code of ioctl reading someother HID.

8. Shell Programming and Scripting

Can I use read to read content of a variable

Can I use the read command to read the contents of a variable? I'm trying by using the following code and getting nothing back. I'm in a Linux environment. #!/bin/ksh IFS=~ VAR1=1~2~3~4 echo $VAR1 | read a b c d print "$a $b $c $d"

9. Shell Programming and Scripting

how to read a variable?

i want to ask how can i read a variable? like for i in 1 2 3 do cat file${1} | while read something do if echo " file name: file${i}" >>temp else echo ", file${i}" >>temp done done it is not working, can i do something like that? actually i want the output below file name:...

10. Shell Programming and Scripting

Output read variable

Hi all, how read varaible and ouput in colum, e.g. $ echo $VAR1 opc op odi games gopher vcsa abrt I like $ echo $VAR1 opc op odi games gopher vcsa abrt

LEARN ABOUT PHP

col

COL(1)							    BSD General Commands Manual 						    COL(1)

NAME

     col -- filter reverse line feeds from input

SYNOPSIS

     col [-bfhpx] [-l num]

DESCRIPTION

     The col utility filters out reverse (and half reverse) line feeds so that the output is in the correct order with only forward and half for-
     ward line feeds, and replaces white-space characters with tabs where possible.  This can be useful in processing the output of nroff(1) and
     tbl(1).

     The col utility reads from the standard input and writes to the standard output.

     The options are as follows:

     -b      Do not output any backspaces, printing only the last character written to each column position.

     -f      Forward half line feeds are permitted (``fine'' mode).  Normally characters printed on a half line boundary are printed on the fol-
	     lowing line.

     -h      Do not output multiple spaces instead of tabs (default).

     -l num  Buffer at least num lines in memory.  By default, 128 lines are buffered.

     -p      Force unknown control sequences to be passed through unchanged.  Normally, col will filter out any control sequences from the input
	     other than those recognized and interpreted by itself, which are listed below.

     -x      Output multiple spaces instead of tabs.

     In the input stream, col understands both the escape sequences of the form escape-digit mandated by Version 2 of the Single UNIX
     Specification (``SUSv2'') and the traditional BSD format escape-control-character.  The control sequences for carriage motion and their ASCII
     values are as follows:

     ESC-BELL	      reverse line feed (escape then bell).
     ESC-7	      reverse line feed (escape then 7).
     ESC-BACKSPACE    half reverse line feed (escape then backspace).
     ESC-8	      half reverse line feed (escape then 8).
     ESC-TAB	      half forward line feed (escape than tab).
     ESC-9	      half forward line feed (escape then 9).  In -f mode, this sequence may also occur in the output stream.
     backspace	      moves back one column (8); ignored in the first column
     carriage return  (13)
     newline	      forward line feed (10); also does carriage return
     shift in	      shift to normal character set (15)
     shift out	      shift to alternate character set (14)
     space	      moves forward one column (32)
     tab	      moves forward to next tab stop (9)
     vertical tab     reverse line feed (11)

     All unrecognized control characters and escape sequences are discarded.

     The col utility keeps track of the character set as characters are read and makes sure the character set is correct when they are output.

     If the input attempts to back up to the last flushed line, col will display a warning message.

ENVIRONMENT

     The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of col as described in environ(7).

EXIT STATUS

     The col utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     colcrt(1), expand(1), nroff(1), tbl(1)

STANDARDS

     The col utility conforms to Version 2 of the Single UNIX Specification (``SUSv2'').

HISTORY

     A col command appeared in Version 6 AT&T UNIX.

BSD
								   May 10, 2015 							       BSD