This fix is from the community, details in the following location.
http://lists.research.att.com/pipermail/ast-developers/2014q1/003846.html
---
--- a/src/cmd/ksh93/bltins/alarm.c_org Tue Mar 25 13:42:56 2014
+++ b/src/cmd/ksh93/bltins/alarm.c Tue Mar 25 13:43:07 2014
@@ -122,7 +122,7 @@
tp->timeout = 0;
tp->flags |= L_FLAG;
tp->sh->sigflag[SIGALRM] |= SH_SIGALRM;
- if(sh_isstate(SH_TTYWAIT))
+ if(sh_isstate(SH_TTYWAIT) && !tp->sh->bltinfun)
sh_timetraps(tp->sh);
}
--- a/src/cmd/ksh93/sh/xec.c_org Tue Mar 25 13:46:48 2014
+++ b/src/cmd/ksh93/sh/xec.c Tue Mar 25 13:48:18 2014
@@ -2720,6 +2720,11 @@
break;
}
}
+ if(shp->trapnote&SH_SIGALRM)
+ {
+ shp->trapnote &= ~SH_SIGALRM;
+ sh_timetraps(shp);
+ }
if(shp->trapnote || (shp->exitval && sh_isstate(SH_ERREXIT)) &&
t && echeck)
sh_chktrap(shp);