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21678: Unsetting tied parameters caused various crashes

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This commit is contained in:
Peter Stephenson 2005-08-22 11:43:58 +00:00
parent 50826130a4
commit 2fb1a9f13c
3 changed files with 55 additions and 3 deletions
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5
ChangeLog
View file

@ -1,3 +1,8 @@
2005-08-22 Peter Stephenson <pws@csr.com>
* 21678: Src/params.c, Test/D04parameter.ztst: unsetting
tied parameters was fraught with crashes.
2005-08-09 Peter Stephenson <pws@csr.com>
* 21577: Dan Bullok: Src/Zle/zle_main.c, Src/init.c,

19
Src/params.c
View file

@ -2329,6 +2329,7 @@ mod_export int
unsetparam_pm(Param pm, int altflag, int exp)
{
Param oldpm, altpm;
char *altremove;
if ((pm->flags & PM_READONLY) && pm->level <= locallevel) {
zerr("read-only variable: %s", pm->nam, 0);
@ -2338,13 +2339,20 @@ unsetparam_pm(Param pm, int altflag, int exp)
zerr("%s: restricted", pm->nam, 0);
return 1;
}
pm->gsu.s->unsetfn(pm, exp);
if (pm->ename && !altflag)
altremove = ztrdup(pm->ename);
else
altremove = NULL;
if (!(pm->flags & PM_UNSET))
pm->gsu.s->unsetfn(pm, exp);
if (pm->env)
delenv(pm);
/* remove it under its alternate name if necessary */
if (pm->ename && !altflag) {
altpm = (Param) paramtab->getnode(paramtab, pm->ename);
if (altremove) {
altpm = (Param) paramtab->getnode(paramtab, altremove);
/* tied parameters are at the same local level as each other */
oldpm = NULL;
while (altpm && altpm->level > pm->level) {
@ -2360,6 +2368,8 @@ unsetparam_pm(Param pm, int altflag, int exp)
}
unsetparam_pm(altpm, 1, exp);
}
zsfree(altremove);
}
/*
@ -2425,6 +2435,8 @@ stdunsetfn(Param pm, UNUSED(int exp))
pm->u.str = NULL;
break;
}
if (!(pm->flags & PM_SPECIAL))
pm->flags &= ~PM_TIED;
pm->flags |= PM_UNSET;
}
@ -2802,6 +2814,7 @@ tiedarrunsetfn(Param pm, UNUSED(int exp))
zsfree(pm->ename);
pm->ename = NULL;
pm->flags &= ~PM_TIED;
pm->flags |= PM_UNSET;
}
/**/

34
Test/D04parameter.ztst
View file

@ -568,6 +568,40 @@
>0
>/elsewhere /somewhere
local STRING=a:b
typeset -T STRING string
print $STRING $string
unset STRING
set -A string x y z
print $STRING $string
STRING=a:b
typeset -T STRING string
print $STRING $string
unset STRING
set -A string x y z
print $STRING $string
STRING=a:b
typeset -T STRING string
print $STRING $string
unset string
STRING=x:y:z
print $STRING $string
STRING=a:b
typeset -T STRING string
print $STRING $string
unset string
STRING=x:y:z
print $STRING $string
0:Unsetting and recreation of tied normal parameters
>a:b a b
>x y z
>a:b a b
>x y z
>a:b a b
>x:y:z
>a:b a b
>x:y:z
string='look for a match in here'
if [[ ${string%%(#b)(match)*} = "look for a " ]]; then
print $match[1] $mbegin[1] $mend[1] $string[$mbegin[1],$mend[1]]