HP-UX Reference (11i v3 07/02) - 2 System Calls (vol 5)

s
sigqueue(2) sigqueue(2)
[EINVAL] The value of the signo argument is an invalid or unsupported signal number.
[EPERM] The process does not have the appropriate privilege to send the signal to the receiving
process.
[ESRCH] The process pid does not exist.
SEE ALSO
kill(2), sysconf(2), privileges(5), signal(5).
440 Hewlett-Packard Company − 2 − HP-UX 11i Version 3: February 2007