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| From | Chet Ramey <chet.ramey@case.edu> |
| Newsgroups | gnu.bash.bug |
| Subject | Re: Environment variable "PS4" can not be passed to bash script from version 4.2.46(2) |
| Date | Tue, 23 Oct 2018 16:47:48 -0400 |
| Lines | 19 |
| Approved | bug-bash@gnu.org |
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| References | <1B925CC0CD9F3341B32D442251E7E1DC392DBFC8@shsmsx102.ccr.corp.intel.com> <20181023160606.wmiv3sneb5vhp6hr@eeg.ccf.org> |
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| To | "Chen, Farrah" <farrah.chen@intel.com>, "bug-bash@gnu.org" <bug-bash@gnu.org> |
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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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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
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