This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
Overview
The sigfillset() function shall initialize the signal set pointed to by set, such that all signals defined in this volume of POSIX.1‐2017 are included.
Return value
Upon successful completion, sigfillset() shall return 0; otherwise, it shall return -1 and set errno to indicate the error.