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sched_yield(2) -- yield the processor
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A process can relinquish the processor voluntarily without blocking by calling sched_yield. The process will then be moved to the end of the queue for its static priority and a new process gets to run... |
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select(2) -- synchronous I/O multiplexing
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The functions select and pselect wait for a number of file descriptors to change status. Their function is identical, with three differences: (i) The select function uses a timeout that is a struct ti... |
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semctl(2) -- semaphore control operations
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The function performs the control operation specified by cmd on the semaphore set (or on the semnum-th semaphore of the set) identified by semid. The first semaphore of the set is indicated by a value... |
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semget(2) -- get a semaphore set identifier
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The function returns the semaphore set identifier associated to the value of the argument key. A new set of nsems semaphores is created if key has value IPC_PRIVATE or key isn't IPC_PRIVATE, no exist... |
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semop(2) -- semaphore operations
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The function performs operations on selected members of the semaphore set indicated by semid. Each of the nsops elements in the array pointed to by sops specify an operation to be performed on a semap... |
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send(2) -- send a message from a socket
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Send, sendto, and sendmsg are used to transmit a message to another socket. Send may be used only when the socket is in a connected state, while sendto and sendmsg may be used at any time. The address... |
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sendfile(2) -- transfer data between file descriptors
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This call copies data between one file descriptor and another. Either or both of these file descriptors may refer to a socket (but see below). in_fd should be a file descriptor opened for reading and ... |
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seteuid(2) -- set effective user or group ID
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seteuid sets the effective user ID of the current process. Unprivileged user processes may only set the effective user ID to the real user ID, the effective user ID or the saved user ID. Precisely the... |
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setfsgid(2) -- set group identity used for file system checks
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setfsgid sets the group ID that the Linux kernel uses to check for all accesses to the file system. Normally, the value of fsgid will shadow the value of the effective group ID. In fact, whenever the ... |
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setfsuid(2) -- set user identity used for file system checks
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setfsuid sets the user ID that the Linux kernel uses to check for all accesses to the file system. Normally, the value of fsuid will shadow the value of the effective user ID. In fact, whenever the ef... |
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setgid(2) -- set group identity
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setgid sets the effective group ID of the current process. If the caller is the superuser, the real and saved group ID's are also set. Under Linux, setgid is implemented like the POSIX version with t... |
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setpgid(2) -- set/get process group
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setpgid sets the process group ID of the process specified by pid to pgid. If pid is zero, the process ID of the current process is used. If pgid is zero, the process ID of the process specified by pi... |
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setresuid(2) -- set real, effective and saved user or group ID
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setresuid (introduced in Linux 2.1.44) sets the real user ID, the effective user ID, and the saved set-user-ID of the current process. Unprivileged user processes (i.e., processes with each of real, e... |
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setreuid(2) -- set real and/or effective user or group ID
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setreuid sets real and effective user IDs of the current process. Unprivileged users may only set the real user ID to the real user ID or the effective user ID, and may only set the effective user ID ... |
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setsid(2) -- creates a session and sets the process group ID
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setsid() creates a new session if the calling process is not a process group leader. The calling process is the leader of the new session, the process group leader of the new process group, and has no... |
