MobileRead Forums - View Single Post - Shell script to wait for user input from K3g keyboard

knc1 · 03-28-2012, 05:11 PM

Yup, looks like it gets stripped:

Code:

core2quad $ sh
$ ST="_ _" ; L=' ' ; ST="$ST$L" ; echo ${#ST}
4
$ ST="_ _" ; L=' ' ; ST="$(echo $ST$L)" ; echo ${#ST}
3

The same behavior will be seen where you try to return a string with a trailing IFS character at the end of the function, unless you escape the string.

Use the %q format to printf rather than echo to return a string that might have a trailing IFS character.

03-28-2012, 05:11 PM	#26
knc1 Going Viral Posts: 17,212 Karma: 18210809 Join Date: Feb 2012 Location: Central Texas Device: No K1, PW2, KV, KOA	Yup, looks like it gets stripped: Code: core2quad $ sh $ ST="_ _" ; L=' ' ; ST="$ST$L" ; echo ${#ST} 4 $ ST="_ _" ; L=' ' ; ST="$(echo $ST$L)" ; echo ${#ST} 3 The same behavior will be seen where you try to return a string with a trailing IFS character at the end of the function, unless you escape the string. Use the %q format to printf rather than echo to return a string that might have a trailing IFS character.