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Full Discussion: Avoid single line output from function
Top Forums Shell Programming and Scripting Avoid single line output from function Post 302905892 by Don Cragun on Sunday 15th of June 2014 10:34:13 PM
Old 06-15-2014
The behavior of echo when given any options and when given any operands that contain any backslash characters varies from shell to shell, OS to OS, and on some operating systems with some shells depending on environment variables in place when the script is run. For portability and consistent behavior across shells and operating systems, use printf instead of echo in these cases.
Code:
#!/bin/sh
inc() {
local value=4
echo "value is $value within the function"
printf '$1 is %s within the function\n' "$1"
}
value=5
echo value is $value before the function
printf '$1 is %s before the function\n' "$1"
printf '\n%s\n\n' "$(inc $value)"
echo value is $value after the function
printf '$1 is %s after the function\n' "$1"

The meaning of local inside a function definition also varies from shell to shell, but since that doesn't seem to be a problem for you, I've left it as is.

If you were expecting -e to allow escape sequences in echo and you weren't expecting escape sequences to work without -e; what were you expecting:
Code:
echo "\\b\$1"

to do?
Last edited by Don Cragun; 06-15-2014 at 11:35 PM.. Reason: Add missing ".
 

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LEARN ABOUT LINUX

ncursesw5-config

ncursesw5-config(1)					      General Commands Manual					       ncursesw5-config(1)

NAME

       ncursesw5-config - helper script for ncurses libraries

SYNOPSIS

       ncursesw5-config [options]

DESCRIPTION

       This is a shell script which simplifies configuring applications against a particular set of ncurses libraries.

OPTIONS

       --prefix
	      echos the package-prefix of ncurses

       --exec-prefix
	      echos the executable-prefix of ncurses

       --cflags
	      echos the C compiler flags needed to compile with ncurses

       --libs echos the libraries needed to link with ncurses

       --version
	      echos the release+patchdate version of ncurses

       --abi-version
	      echos the ABI version of ncurses

       --mouse-version
	      echos the mouse-interface version of ncurses

       --bindir
	      echos the directory containing ncurses programs

       --datadir
	      echos the directory containing ncurses data

       --includedir
	      echos the directory containing ncurses header files

       --libdir
	      echos the directory containing ncurses libraries

       --mandir
	      echos the directory containing ncurses manpages

       --terminfo
	      echos the $TERMINFO terminfo database path, e.g.,
	      /usr/share/terminfo

       --terminfo-dirs
	      echos the $TERMINFO_DIRS directory list, e.g.,
	      /etc/terminfo:/lib/terminfo:/usr/share/terminfo

       --termpath
	      echos the $TERMPATH termcap list, if support for termcap is configured.

       --help prints this message

SEE ALSO

       curses(3X)

       This describes ncurses version 5.9 (patch 20110404).

															       ncursesw5-config(1)
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