This repository was archived by the owner on Jun 16, 2025. It is now read-only.
This repository was archived by the owner on Jun 16, 2025. It is now read-only.
ksh inherits readonly exported variables from the parent, breaking scripts #1505
Description
$ ksh --version
version sh (AT&T Research) 93u+m/1.0.0-beta.2 2021-12-17
I know, not the latest version so I'm terribly sorry if I report already fixed issue.
$ cat aaa
#!/usr/bin/ksh
VAR=yes
typeset -p VAR
$ chmod +x aaa
$ ksh -c 'readonly VAR=foo ; export VAR; ./aaa'
./aaa: line 1: VAR: is read only
# similarly integer variables
$ ksh -c 'typeset -i VAR=123; export VAR; ./aaa'
typeset -x -i VAR=0
I would expect the new process inherit the exported variable, but not the type of variable. The script can protect himself against integer variables by running typeset VAR=yes which is not reasonable (to me) to do for any and all variables used. I don't know if there is a way to un-readonly a variable at all.