|PTHREAD_KILL(3)||Linux Programmer's Manual||PTHREAD_KILL(3)|
int pthread_kill(pthread_t thread, int sig);
Compile and link with -pthread.
_POSIX_C_SOURCE >= 199506L || _XOPEN_SOURCE >= 500
If sig is 0, then no signal is sent, but error checking is still performed.
- An invalid signal was specified.
|pthread_kill ()||Thread safety||MT-Safe|
The glibc implementation of pthread_kill() gives an error (EINVAL) on attempts to send either of the real-time signals used internally by the NPTL threading implementation. See nptl(7) for details.
POSIX.1-2008 recommends that if an implementation detects the use of a thread ID after the end of its lifetime, pthread_kill() should return the error ESRCH. The glibc implementation returns this error in the cases where an invalid thread ID can be detected. But note also that POSIX says that an attempt to use a thread ID whose lifetime has ended produces undefined behavior, and an attempt to use an invalid thread ID in a call to pthread_kill() can, for example, cause a segmentation fault.