Process Management

The posix_spawn() call has been added to the ChorusOS operating system. The implementation of this call differs to some extent from the POSIX standard. See the posix_spawn(2POSIX) man page for a complete description of the ChorusOS implementation.

The implementation of the setsid() call differs from the POSIX standard. Refer to the setsid(2POSIX) man page for a complete description of the ChorusOS implementation.

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)