diff options
| -rw-r--r-- | Doc/Zsh/params.yo | 12 | ||||
| -rw-r--r-- | Src/params.c | 6 | ||||
| -rw-r--r-- | Test/D04parameter.ztst | 20 |
3 files changed, 37 insertions, 1 deletions
diff --git a/Doc/Zsh/params.yo b/Doc/Zsh/params.yo index 1ed1e2a0f..86f9c7d29 100644 --- a/Doc/Zsh/params.yo +++ b/Doc/Zsh/params.yo @@ -632,7 +632,17 @@ The version number of this zsh. enditem() texinode(Parameters Used By The Shell)()(Parameters Set By The Shell)(Parameters) sect(Parameters Used By The Shell) -The following parameters are used by the shell: +The following parameters are used by the shell. + +In cases where there are two parameters with an upper- and lowercase +form of the same name, such as tt(path) and tt(PATH), the lowercase form +is an array and the uppercase form is a scalar with the elements of the +array joined together by colons. These are similar to tied parameters +created via `tt(typeset -T)'. The normal use for the colon-separated +form is for exporting to the environment, while the array form is easier +to manipulate within the shell. Note that unsetting either of the pair +will unset the other; they retain their special properties when +recreated, and recreating one of the pair will recreate the other. startitem() vindex(ARGV0) diff --git a/Src/params.c b/Src/params.c index 28a8f1e85..63e1dc75c 100644 --- a/Src/params.c +++ b/Src/params.c @@ -669,6 +669,12 @@ createparam(char *name, int flags) if (oldpm && (oldpm->level == locallevel || !(flags & PM_LOCAL))) { if (!(oldpm->flags & PM_UNSET) || (oldpm->flags & PM_SPECIAL)) { oldpm->flags &= ~PM_UNSET; + if ((oldpm->flags & PM_SPECIAL) && oldpm->ename) { + Param altpm = + (Param) paramtab->getnode(paramtab, oldpm->ename); + if (altpm) + altpm->flags &= ~PM_UNSET; + } return NULL; } if ((oldpm->flags & PM_RESTRICTED) && isset(RESTRICTED)) { diff --git a/Test/D04parameter.ztst b/Test/D04parameter.ztst index 7304f31d7..3bb143a33 100644 --- a/Test/D04parameter.ztst +++ b/Test/D04parameter.ztst @@ -526,3 +526,23 @@ >fixed >the >shell + + unset SHLVL + (( SHLVL++ )) + print $SHLVL +0:Unsetting and recreation of numerical special parameters +>1 + + unset manpath + print $+MANPATH + manpath=(/here /there) + print $MANPATH + unset MANPATH + print $+manpath + MANPATH=/elsewhere:/somewhere + print $manpath +0:Unsetting and recreation of tied special parameters +>0 +>/here:/there +>0 +>/elsewhere /somewhere |