raise - send a signal to the executing process
int raise(int sig);
[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to the ISO C standard.
The raise() function shall send the signal sig to the executing [CX] thread or process. If a signal handler is called, the raise() function shall not return until after the signal handler does.
[THR] If the implementation supports the Threads option, the effect of the raise() function shall be equivalent to calling:pthread_kill(pthread_self(), sig);
[CX] Otherwise, the effect of the raise() function shall be equivalent to calling:kill(getpid(), sig);
Upon successful completion, 0 shall be returned. Otherwise, a non-zero value shall be returned [CX] and errno shall be set to indicate the error.
The raise() function shall fail if:
- [CX] The value of the sig argument is an invalid signal number.
The term "thread" is an extension to the ISO C standard.
kill(), sigaction(), the Base Definitions volume of IEEE Std 1003.1-2001, <signal.h>, <sys/types.h>
First released in Issue 4. Derived from the ANSI C standard.
The DESCRIPTION is updated for alignment with the POSIX Threads Extension.
Extensions beyond the ISO C standard are marked.
The following new requirements on POSIX implementations derive from alignment with the Single UNIX Specification:
In the RETURN VALUE section, the requirement to set errno on error is added.
The [EINVAL] error condition is added.