.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
.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]