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Full Discussion: perl: printf indentation problem
Top Forums Shell Programming and Scripting perl: printf indentation problem Post 302179151 by wolwy_pete on Thursday 27th of March 2008 05:26:02 AM
Old 03-27-2008
Data perl: printf indentation problem
hi all,
im having a problem with using perl printf. my requirement is to print a string (like [OK]) at the right most end of the screen.
i tried this perl script, but it fails with an error;
Code:
#!/usr/bin/perl 

use strict;
use warnings;

my $scrW = 0;

my $str = `stty size`;   # get the screen character width 
$str =~ m/(\d+)\s*$/;    # extract the char width
$scrW = eval($1);           # put the char width in a varable $scrW

$scrW -=10;                     # reduce the char width by 10
printf "%($scrW)s\n", "abcde";

tried to use printf with a variable as indentation length, but fails.
this type of method works in bash.
does anyone have an idea ?

thankx.
 

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LEARN ABOUT SUNOS

eucscol

euclen(3C)						   Standard C Library Functions 						euclen(3C)

NAME

       euclen, euccol, eucscol - get byte length and display width of EUC characters

SYNOPSIS

       #include <euc.h>

       int euclen(const unsigned char *s);

       int euccol(const unsigned char *s);

       int eucscol(const unsigned char *str);

DESCRIPTION

       The euclen() function returns the length in bytes of the Extended Unix Code (EUC) character pointed to by s, including single-shift charac-
       ters, if present.

       The euccol() function returns the screen column width of the EUC character pointed to by s.

       The eucscol() function returns the screen column width of the EUC string pointed to by str.

       For the euclen() and euccol(), functions, s points to the first byte of the character. This byte is examined to determine its codeset.  The
       character type table for the current locale is used for codeset byte length and display width information.

USAGE

       These functions will work only with EUC locales.

       These functions can be used safely in multithreaded applications, as long as setlocale(3C) is not called to change the locale.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       |MT-Level		     |MT-Safe with exceptions	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       getwidth(3C), setlocale(3C), attributes(5)

SunOS 5.10							    20 Dec 1996 							euclen(3C)
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