sigsend.2 (2010 09)

sigsend(2) sigsend(2)

RETURN VALUE

Upon successful completion, sigsend() returns a value of

0. Otherwise, it returns a value of −1 and

sets

errno to indicate the error.

ERRORS

sigsend() fails, it sets errno (see errno (2)) to one of the following values:

[EINVAL] sig is neither a valid signal number nor zero.

[EINVAL] idtype is not a valid value.

[EINVAL] sig is

SIGKILL, idtype is P_PID, and id is 1.

[ESRCH] No process can be found corresponding to that speciﬁed by id and idtype .

[EPERM] The user ID of the sending process is not 0, and its real or effective user ID does not

match the real or effective user ID of the receiving process, and the calling process

is not sending

SIGCONT to a process that shares the same session ID.