Martijn Dekker e1c41bb2de Fix subshell leak for 3 special variables (re: 417883df, bd3e2a80) ... Using a process of elimination I've identified ${.sh.level} (SH_LEVELNOD) as the cause of the crash. This node apparently cannot be copied or moved without destabilising the shell. It contains the current depth of function calls and it cannot be changed by assignment, so this is not actually a problem. Meanwhile, this commit re-fixes it for the other three. src/cmd/ksh93/sh/subshell.c: - Simplify sh_assignok() by removing special-casing for L_ARGNOD, SH_SUBSCRNOD and SH_NAMENOD. 'add' now has 3 modes (0, 1, 2). - The test for a ${ subshare; } was actually wrong. sp->subshare is a saved backup value. We must test shp->subshare. (re: a9de50bf) src/cmd/ksh93/bltins/typeset.c: - setall(): Update the mode 3 sh_assignok() call. src/cmd/ksh93/tests/variables.sh: - Regress-test subshell leaks for all special variables except ${.sh.level}.		2020-09-05 20:47:03 +02:00
..
builtin	Fix some errors in the documentation and other minor issues (#42)	2020-06-25 19:31:51 +02:00
INIT	bin/package: do not use previously compiled shell	2020-08-26 22:15:50 +01:00
ksh93	Fix subshell leak for 3 special variables (re: 417883df, bd3e2a80)	2020-09-05 20:47:03 +02:00
Makefile	Version: 2012-08-01-master	2016-01-11 15:54:23 -05:00
Mamfile	Version: 2012-08-01-master	2016-01-11 15:54:23 -05:00