Signals

ChorusOS 5.0 provides the POSIX signal APIs, enabling applications to post and catch signals. Signals may be either synchronous or asynchronous. Signals may also be posted between applications or by the system to applications.

There are, however, limitations on the ChorusOS signal API. The ChorusOS operating system does not support the complete range of signals, as defined by POSIX.

There are also limitations in APIs such as sigaction() with respect to the POSIX specification. For example, SA_ONSTACK is not supported as a part of the sigaction() API. Refer to the following man pages for more information:

• sigaction(2POSIX)
• sigpending(2POSIX)
• sigprocmask(2POSIX)
• sigqueue(2POSIX)
• sigsuspend(2POSIX)
• sigtimedwait(2POSIX)
• sigwaitinfo(2POSIX)