Signal handling is straightforward in a traditional, nonthreaded UNIX environment that uses pre-12.0 or version 12.0 and later nonthreaded Sybase libraries. Each process has a single thread of control. You register a handler for a given signal with Open Client/Server library calls. Use ct_callback in Client-Library and srv_signal in Server-Library.
When a signal occurs, the Sybase library traps the signal and calls the designated signal handler. To mask a signal, blocking it from delivery to a process, use the sigprocmask UNIX system call.
