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Full Discussion: sed add space X times
Top Forums Shell Programming and Scripting sed add space X times Post 302932815 by Don Cragun on Saturday 24th of January 2015 11:55:36 PM
Old 01-25-2015
The whole concept of adding a random number of spaces to the end of a string doesn't make any sense to me.

I can see wanting to pad a field with trailing spaces to create a fields that contains exactly X characters:
printf '%-*.*s\n' $X $X "$field_contents"

I can see wanting to pad a field with leading spaces to create a field that contains exactly X characters:
printf '%*.*s\n' $X $X "$field_contents"

I can see wanting to pad a field with trailing spaces to create a field that is at least X characters (but not truncate the field if it is longer):
printf '%-*s\n' $X "$field_contents"

I can see wanting to pdd a field with leading spaces to create a field that is at least X characters (but not truncate the field if it is longer):
printf '%*s\n' $X "$field_contents"

Why do you want to add a random number of space???
 

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FORMS(3)						   BSD Library Functions Manual 						  FORMS(3)

NAME
field_back, field_fore, field_pad, set_field_back, set_field_fore, set_field_pad -- form library LIBRARY
Curses Form Library (libform, -lform) SYNOPSIS
#include <form.h> chtype field_back(FIELD *field); chtype field_fore(FIELD *field); int field_pad(FIELD *field); int set_field_back(FIELD *field, chtype attribute); int set_field_fore(FIELD *field, chtype attribute); int set_field_pad(FIELD *field, int pad); DESCRIPTION
Calling the function field_back() will return the character attributes that will be applied to a field that is not the current field, these attributes can be set by the set_field_back() function. The field_fore() function returns the character attributes that will be used to indicate that a field is the currently active one on the form, this attribute may be set by using the set_field_fore() function. The pad character for a field is the character that will be printed in all field locations not occupied with actual field contents. The pad charac- ter can be retrieved by calling the field_pad() function, the pad character is set by using the set_field_pad() function. RETURN VALUES
Functions returning pointers will return NULL if an error is detected. The functions that return an int will return one of the following error values: E_OK The function was successful. SEE ALSO
curses(3), forms(3) NOTES
The header <form.h> automatically includes both <curses.h> and <eti.h>. BSD
January 1, 2001 BSD
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