.Fa "stack_t *restrict oss"
.Fc
.Sh DESCRIPTION
-.Fn Sigaltstack
+.Fn sigaltstack
allows users to define an alternate stack on which signals
are to be processed.
If
duration of the signal handler's execution.
.Pp
If
-.Dv SA_DISABLE
+.Dv SS_DISABLE
is set in
.Fa ss_flags ,
.Fa ss_sp
field will contain the value
.Dv SA_ONSTACK
if the process is currently on a signal stack and
-.Dv SA_DISABLE
+.Dv SS_DISABLE
if the signal stack is currently disabled.
.Sh NOTES
The value
.Va errno
is set to indicate the error.
.Sh ERRORS
-.Fn Sigaltstack
+.Fn sigaltstack
will fail and the signal stack context will remain unchanged
if one of the following occurs.
.Bl -tag -width [ENOMEM]