posix_kill Send a signal to a process &reftitle.description; boolposix_kill intpid intsig Send the signal sig to the process with the process identifier pid. &reftitle.parameters; pid The process identifier. sig One of the PCNTL signals constants. &reftitle.returnvalues; &return.success; &reftitle.seealso; The kill(2) manual page of the POSIX system, which contains additional information about negative process identifiers, the special pid 0, the special pid -1, and the signal number 0.