Since the systemd update v254 from July 28, 2023, the capability
'CAP_WAKE_ALARM' is passed by default to some user process (especially
desktop managers). Since 'CAP_WAKE_ALARM' is very narrow in focus, it
is preferable that zsh does not consider it as a 'privileged'
capability.
1) Document the behavior of "typeset -n existing_var" (via Jun T. comment)
2) Prohibit "typeset -nm pattern" because, well, it's insane. Add test.
3) Improve doc for ${(!)ref} including ${{t!)ref} (Jun T.)
4) Fix doc for how-to unset of a named ref (Jun T.)
5) Allow "typeset +r -n ref" and "typeset +r +n ref" (Jun T.)
6) Fix "typeset -r -n ref=param" to create readonly references
7) Avoid accidental removal of PM_UNSET flag (Jun T.) and update test
8) Fix "typeset -gn ref=value" and add a test for it
9) Add tests for read-only reference behavior
10) Fix infinite recursion when resolving scope of an unset local
named reference, add test.
If full RELRO (relocation read-only, one of the security enhancement
methods for ELF-based systems) is used when building zsh (as in binary
packages of most Linuxes), loading a module (e.g. zsh/zftp) fails unless
all the modules it depends on are already loaded. With this patch the
necessary modules are automatically loaded.
This is a special case where TRAPEXIT is unset within a TRAPEXIT
as it should never run in a nested context, so just save the
function structure temporarily on the heap.
The full pathname is obatined by a reliable method on macOS and systems
that support procfs. But on other systems (FreeBSD, OpenBSD, ...) it is
guessed from argv[0], PWD and PATH.
The "-m pattern" option is supposed to enable printing namespaces, but
that didn't work when combined with -p.
The -p option could also cause an unset parameter to become set if a
named reference pointed at it.
Coverity noticed that this first branch of the if statement has "meta"
added to all the variable names except this zlecs at the end, so change
it to match.
A bug with zmodload when unloading/reloading a static module caused the
state of the shell options to change during K01 test. Worked around it.
Also changed warnnestedvar messages to look more like other such.
* Add "unset -n"
* Allow and enforce "typeset -n -r" for read-only references
* "can't change type via subscript reference" error
* Better checking for self-referential declarations/assignments
* Ksh-style "foo=bar; typeset -n foo" creates foo=bar reference
* Support "typeset -n ref; for ref in ..."
* Subscripted references use NO_EXEC for safety
* References assigned in called scopes reset scope at end
* Allow named references to $! $? $$ $- $0 $_
