HP-UX Reference (11i v2 03/08) - 2 System Calls (vol 5)

semop(2) semop(2)

[EAGAIN] The operation would result in suspension of the calling process but (sem_ﬂg &

IPC_NOWAIT) is ‘‘true’’.

[ENOSPC] The limit on the number of individual processes requesting an

SEM_UNDO would

be exceeded.

[EINVAL] The number of individual semaphores for which the calling process requests a

SEM_UNDO would exceed the limit.

[ERANGE] An operation would cause a semval to overﬂow the system-imposed limit.

[ERANGE] An operation would cause a semadj value to overﬂow the system-imposed limit.

[EFAULT] sops points to an illegal address. The reliable detection of this error will be imple-

mentation dependent.

semtimedop() fails if one or more of the following is true:

[EFAULT] The timeout argument points to an illegal address.

[EINVAL] The timeout argument has one or more invalid ﬁelds. For example, tv_sec or

tv_nsec is less than 0 or tv_nsec is greater than or equal to one billion.

[EAGAIN] The timeout expired before the semaphore operations could be completed.

Upon successful completion, the value of sempid for each semaphore speciﬁed in the array pointed to by

sops is set equal to the process ID of the calling process. The value of

sem_otime in the data structure

associated with the semaphore identiﬁer will be set to the current time.

WARNINGS

Check all references to signal (5) for appropriateness on systems that support sigvector (2). sigvector (2)

can affect the behavior described on this page.