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Full Discussion: Looping on variable having new line \n fails
Top Forums Shell Programming and Scripting Looping on variable having new line \n fails Post 303038283 by Corona688 on Thursday 29th of August 2019 01:43:29 PM
Old 08-29-2019
You can simplify your loops by controlling the special IFS variable. The shell itself can be told to split on newlines and only newlines, or on commas, or quotes, or whatever.

Code:
OLDIFS="$IFS"
# Yes, looks funny, but its a single newline in double-quotes
IFS="
"
STR="string
containing lots of
newlines and
stuff"

for X in $STR
do
        echo "X is $X"
done

# Restore normal splitting behavior
IFS="$OLDIFS"

Also, some of those echoes look redundant.

Code:
filelistonly="${filelistonly}${fileresult%:*}\n"

...and most of those \n's in your code aren't real newlines:

Code:
$ echo "\n"

\n

$

So I suspect a lot of your code isn't doing what you think it is.
Last edited by Corona688; 08-29-2019 at 02:49 PM..
 

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LEARN ABOUT SUNOS

nl

nl(3XCURSES)						  X/Open Curses Library Functions					      nl(3XCURSES)

NAME

       nl, nonl - enable/disable newline control

SYNOPSIS

       cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib 
       -R /usr/xpg4/lib -lcurses [ library... ]

       c89 [ flag... ] file... -lcurses [ library... ]

       #include <curses.h>

       int nl(void);

       int nonl(void);

DESCRIPTION

       The  nl()  function enables the handling of newlines.  The nl() function converts newline into carriage return and line feed  on output and
       converts carriage return into newline on input.	nonl() disables the handling of newlines.

       The handling of newlines is initially enabled.  Disabling the handling of newlines results in faster cursor motion since  X/Open Curses can
       use the line-feed capability more efficiently.

RETURN VALUES

       On success, these functions return OK. Otherwise, they return ERR.

ERRORS

       None.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       libcurses(3XCURSES), attributes(5), standards(5)

SunOS 5.10							    5 Jun 2002							      nl(3XCURSES)
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