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settimeofday(2) -- get/set date and time
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Note: time zone information is no longer provided by this interface. See localtime(3) for information on how to retrieve it. The system's notion of the current UTC time is obtained with the gettimeof... |
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setuid(2) -- set user and group ID
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The setuid() function sets the real and effective user IDs and the saved set-user-ID of the current process to the specified value. The setuid() function is permitted if the specified ID is equal to t... |
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shmat(2) -- map/unmap shared memory
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shmat() maps the shared memory segment associated with the shared memory identifier shmid into the address space of the calling process. The address at which the segment is mapped is determined by the... |
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shmctl(2) -- shared memory control operations
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The shmctl() system call performs control operations on the shared memory segment specified by shmid. Each shared memory segment has a shmid_ds structure associated with it which contains the followin... |
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shmdt(2) -- map/unmap shared memory
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shmat() maps the shared memory segment associated with the shared memory identifier shmid into the address space of the calling process. The address at which the segment is mapped is determined by the... |
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shmget(2) -- get shared memory segment
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shmget() returns the shared memory identifier associated with the key key. The shmflg should be a combination of the following flags: IPC_CREAT create if segment does not exist IPC_EXCL fail if segmen... |
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shutdown(2) -- shut down part of a full-duplex connection
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The shutdown() call causes all or part of a full-duplex connection on the socket associated with s to be shut down. The how argument specifies which part of the connection will be shut down. Permissib... |
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sigaction(2) -- software signal facilities
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The system defines a set of signals that may be delivered to a process. Signal delivery resembles the occurrence of a hardware interrupt: the signal is blocked from further occurrence, the current pro... |
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sigaltstack(2) -- set and/or get signal stack context
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sigaltstack() allows users to define an alternative stack on which signals are to be processed. If ss is non-zero, it specifies a pointer to and the size of a signal stack on which to deliver signals,... |
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sigpending(2) -- get pending signals
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The sigpending function returns a mask of the signals pending for delivery to the calling process in the location indicated by set. Signals may be pending because they are currently masked, or they ar... |
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sigprocmask(2) -- manipulate current signal mask
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The sigprocmask() function examines and/or changes the current signal mask (those signals that are blocked from delivery). Signals are blocked if they are members of the current signal mask set. If se... |
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sigreturn(2) -- return from signal
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sigreturn() allows users to atomically unmask, switch stacks, and return from a signal context. The processes signal mask and stack status are restored from the context. The system call does not retur... |
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sigstack(2) -- set and/or get signal stack context
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The sigstack() function has been deprecated in favor of the interface described in sigaltstack(2). |
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sigsuspend(2) -- atomically release blocked signals and wait for interrupt
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sigsuspend() temporarily changes the blocked signal mask to the set to which sigmask points, and then waits for a signal to arrive; on return the previous set of masked signals is restored. The signal... |
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socket(2) -- create an endpoint for communication
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socket() creates an endpoint for communication and returns a descriptor. The domain parameter specifies a communications domain within which communication will take place; this selects the protocol fa... |
