osx - When change $IFS in bash on Mac OS X -


i met problem when change value of $ifs in bash on mac os x. example, have main directory /xxx/xxx/xxx, , 2 sub-directories subdir1 , subdir2. if run shell script

maindir=/xxx/xxx/xxx; subdirs=$(find $maindir -type d -maxdepth 1); echo $subdirs

normally results this

/xxx/xxx/xxx/subdir1 /xxx/xxx/xxx/subdir2

these 2 subdirectories separated blankspace. problem is, when change once $ifs value this:

oldifs=$ifs;  ifs=$'\n'; ifs=oldifs;

after that, if check again value of $subdirs

echo $subdirs

the results become

/xxx/xxx/xxx/subdir1 /xxx/xxx/xxx/subdir2

it seems bash automatically changes blankspace \n. bothers me. there solution change \n blankspace? system mac os x version 10.7.5.

you didn't reset ifs (or set oldifs in first place):

oldifs="$ifs" ifs=$'\n' ... ifs="$oldifs"

(this fails restore ifs unset state if unset prior saving "value", that's not worth going here.)


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