If OACT is not NULL, put the old action for SIG in *OACT. */
/* psm: couldn't use __sigaction, if building w/ disabled hidden,
* it will conflict w/ the one in libpthread */
If OACT is not NULL, put the old action for SIG in *OACT. */
/* psm: couldn't use __sigaction, if building w/ disabled hidden,
* it will conflict w/ the one in libpthread */