Got it, thanks for the info.
Thanks, Fan -----Original Message----- From: Chet Ramey [mailto:chet.ra...@case.edu] Sent: Wednesday, October 24, 2018 4:48 AM To: Chen, Farrah <farrah.c...@intel.com>; bug-bash@gnu.org Cc: chet.ra...@case.edu Subject: 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 c...@case.edu http://tiswww.cwru.edu/~chet/
