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Top Forums Shell Programming and Scripting Return variable value from a script running in background Post 302748583 by Scrutinizer on Wednesday 26th of December 2012 08:47:30 AM
Old 12-26-2012
A child script cannot pass variables to a parent script. There are ways to read the output of the child script in the parent script. For example:

Code:
$ cat back.sh
echo 4 5

$ cat fore.sh
TESTFIFO=./testfifo
mkfifo "$TESTFIFO"
./back.sh > "$TESTFIFO" &
echo hello
read a b < "$TESTFIFO"
echo "a=$a"
echo "b=$b"
echo "d=$((a+b))"
rm "$TESTFIFO"

$ ./fore.sh
hello
a=4
b=5
d=9

Alternatively, ksh93 and bash 4 can use coprocesses

Last edited by Scrutinizer; 12-26-2012 at 10:18 AM..
 

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LOCALE_GET_DISPLAY_SCRIPT(3)						 1					      LOCALE_GET_DISPLAY_SCRIPT(3)

Locale::getDisplayScript - Returns an appropriately localized display name for script of the input locale

	Object oriented style

SYNOPSIS
publicstatic string Locale::getDisplayScript (string $locale, [string $in_locale]) DESCRIPTION
Procedural style string locale_get_display_script (string $locale, [string $in_locale]) Returns an appropriately localized display name for script of the input locale. If is NULL then the default locale is used. PARAMETERS
o $locale - The locale to return a display script for o $in_locale - Optional format locale to use to display the script name RETURN VALUES
Display name of the script for the $locale in the format appropriate for $in_locale. EXAMPLES
Example #1 locale_get_display_script(3) example <?php echo locale_get_display_script('sl-Latn-IT-nedis', 'en'); echo "; "; echo locale_get_display_script('sl-Latn-IT-nedis', 'fr'); echo "; "; echo locale_get_display_script('sl-Latn-IT-nedis', 'de'); ?> Example #2 OO example <?php echo Locale::getDisplayScript('sl-Latn-IT-nedis', 'en'); echo "; "; echo Locale::getDisplayScript('sl-Latn-IT-nedis', 'fr'); echo "; "; echo Locale::getDisplayScript('sl-Latn-IT-nedis', 'de'); ?> The above example will output: Latin; latin; Lateinisch SEE ALSO
locale_get_display_name(3), locale_get_display_language(3), locale_get_display_region(3), locale_get_display_variant(3). PHP Documentation Group LOCALE_GET_DISPLAY_SCRIPT(3)
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