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Fix two problems with 'unset -f' behavior (#22)

Browse source 
src/cmd/ksh93/sh/name.c:
 - Correct the check for when a function is currently running
   to fix a segmentation fault that occurred when a POSIX
   function tries to unset itself while it is running.
   This bug fix was backported from ksh93v-.

src/cmd/ksh93/sh/xec.c:
 - If a function tries to unset itself, unset the function
   with '_nv_unset(np, NV_RDONLY)' to fix a silent failure.
   This fix was also backported from ksh93v-.

src/cmd/ksh93/tests/functions.sh:
 - Add four regression tests for when a function unsets itself.

Resolves #21
This commit is contained in:
Johnothan King 2020-06-17 10:26:43 -07:00 • committed by GitHub
parent 746ce73671
commit b7932e87b6
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5 changed files with 25 additions and 2 deletions
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2
src/cmd/ksh93/sh/name.c
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@ -2509,7 +2509,7 @@ void _nv_unset(register Namval_t *np,int flags)
if(is_afunction(np) && np->nvalue.ip)
{
register struct slnod *slp = (struct slnod*)(np->nvenv);
if(shp->st.real_fun == np->nvalue.rp)
if(np->nvalue.rp->running)
{
np->nvalue.rp->running |= 1;
return;