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Re: Environment variable "PS4" can not be passed to bash script from version 4.2.46(2)

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  Re: Environment variable "PS4" can not be passed to bash script from version 4.2.46(2) Chet Ramey <chet.ramey@case.edu> - 2018-10-23 16:47 -0400

#14734 — Re: Environment variable "PS4" can not be passed to bash script from version 4.2.46(2)

On 10/23/18 12:06 PM, Greg Wooledge wrote:
> On Tue, Oct 23, 2018 at 03:20:12PM +0000, Chen, Farrah wrote:
>> But in Bash script, it cannot work, it keeps its original value:
>> [root@fchen ~]# cat test.sh
>> #!/usr/bin/bash
>> echo $PS4
>> echo $FAN
> 
> This is because you're doing it as root.  Bash strips PS4 from the
> environment when started as root, as a security precaution.

That change came in in bash-4.3 (patch 48). His vendor probably patched
their version of bash-4.2 to do the same thing.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
		 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/

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