Section 2

Section 2 of the manual describes the Linux system calls. A system call is an entry point into the Linux kernel. Usually, system calls are not invoked directly: instead, most system calls have corresponding C library wrapper functions which perform the steps required (e.g., trapping to kernel mode) in order to invoke the system call. Thus, making a system call looks the same as invoking a normal library function.

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s390_sthyi: emulate STHYI instruction
sbrk: brk, sbrk - change data segment size
sbrk: brk , sbrk — change data segment size
sched_get_priority_max: sched_get_priority_max, sched_get_priority_min - get static priority range
sched_get_priority_max: sched_get_priority_max , sched_get_priority_min , sched_rr_get_interval — get scheduling parameter limits
sched_get_priority_min: sched_get_priority_max, sched_get_priority_min - get static priority range
sched_get_priority_min: sched_get_priority_max , sched_get_priority_min , sched_rr_get_interval — get scheduling parameter limits
sched_getaffinity: sched_setaffinity, sched_getaffinity - set and get a thread's CPU affinity mask
sched_getattr: sched_setattr, sched_getattr - set and get scheduling policy and attributes
sched_getparam: sched_setparam, sched_getparam - set and get scheduling parameters
sched_getparam: sched_setparam , sched_getparam — set/get scheduling parameters
sched_getscheduler: sched_setscheduler, sched_getscheduler - set and get scheduling policy/parameters
sched_getscheduler: sched_setscheduler , sched_getscheduler — set/get scheduling policy and scheduler parameters
sched_rr_get_interval: get the SCHED_RR interval for the named process
sched_rr_get_interval: sched_get_priority_max , sched_get_priority_min , sched_rr_get_interval — get scheduling parameter limits
sched_setaffinity: sched_setaffinity, sched_getaffinity - set and get a thread's CPU affinity mask
sched_setattr: sched_setattr, sched_getattr - set and get scheduling policy and attributes
sched_setparam: sched_setparam, sched_getparam - set and get scheduling parameters
sched_setparam: sched_setparam , sched_getparam — set/get scheduling parameters
sched_setscheduler: sched_setscheduler, sched_getscheduler - set and get scheduling policy/parameters
sched_setscheduler: sched_setscheduler , sched_getscheduler — set/get scheduling policy and scheduler parameters
sched_yield: yield the processor
sched_yield: yield processor
sctp_generic_recvmsg: receive data from a peer
sctp_generic_sendmsg: sctp_generic_sendmsg
sctp_peeloff: detach an association from a one-to-many socket to its own fd
seccomp: operate on Secure Computing state of the process
seccomp_unotify: Seccomp user-space notification mechanism
security: afs_syscall, break, fattach, fdetach, ftime, getmsg, getpmsg, gtty, isastream, lock, madvise1, mpx, prof, profil, putmsg, putpmsg, security, stty, tuxcall, ulimit, vserver - unimplemented system calls
select: select, pselect, FD_CLR, FD_ISSET, FD_SET, FD_ZERO, fd_set - synchronous I/O multiplexing
select: synchronous I/O multiplexing
select_tut: select, pselect - synchronous I/O multiplexing
semctl: System V semaphore control operations
semctl: control operations on a semaphore set
semget: get a System V semaphore set identifier
semget: obtain a semaphore id
semop: semop, semtimedop - System V semaphore operations
semop: atomic array of operations on a semaphore set
semtimedop: semop, semtimedop - System V semaphore operations
send: send, sendto, sendmsg - send a message on a socket
send: send , sendto , sendmsg , sendmmsg — send message(s) from a socket
sendfile: transfer data between file descriptors
sendfile: send a file to a socket
sendfile64: sendfile - transfer data between file descriptors
sendmmsg: send multiple messages on a socket
sendmmsg: send , sendto , sendmsg , sendmmsg — send message(s) from a socket
sendmsg: send, sendto, sendmsg - send a message on a socket
sendmsg: send , sendto , sendmsg , sendmmsg — send message(s) from a socket
sendto: send, sendto, sendmsg - send a message on a socket
sendto: send , sendto , sendmsg , sendmmsg — send message(s) from a socket
set_mempolicy: set default NUMA memory policy for a thread and its children
set_robust_list: get_robust_list, set_robust_list - get/set list of robust futexes
set_thread_area: get_thread_area, set_thread_area - manipulate thread-local storage information
set_tid_address: set pointer to thread ID
setaudit: setaudit , setaudit_addr — set audit session state
setaudit_addr: setaudit , setaudit_addr — set audit session state
setauid: set audit session ID
setdomainname: getdomainname, setdomainname - get/set NIS domain name
setegid: seteuid, setegid - set effective user or group ID
setegid: setuid , seteuid , setgid , setegid — set user and group ID
seteuid: seteuid, setegid - set effective user or group ID
seteuid: setuid , seteuid , setgid , setegid — set user and group ID
setfib: set the default FIB (routing table) for the calling process
setfsgid: set group identity used for filesystem checks
setfsgid32: setfsgid - set group identity used for filesystem checks
setfsuid: set user identity used for filesystem checks
setfsuid32: setfsuid - set user identity used for filesystem checks
setgid: set group identity
setgid: setuid , seteuid , setgid , setegid — set user and group ID
setgid32: setgid - set group identity
setgroups: getgroups, setgroups - get/set list of supplementary group IDs
setgroups: set group access list
setgroups32: getgroups, setgroups - get/set list of supplementary group IDs
sethostname: gethostname, sethostname - get/set hostname
setitimer: getitimer, setitimer - get or set value of an interval timer
setitimer: getitimer , setitimer — get/set value of interval timer
setlogin: getlogin , getlogin_r , setlogin — get/set login name
setloginclass: getloginclass , setloginclass — get/set login class
setns: reassociate thread with a namespace
setpgid: setpgid, getpgid, setpgrp, getpgrp - set/get process group
setpgid: setpgid , setpgrp — set process group
setpgrp: setpgid, getpgid, setpgrp, getpgrp - set/get process group
setpgrp: setpgid , setpgrp — set process group
setpriority: getpriority, setpriority - get/set program scheduling priority
setpriority: getpriority , setpriority — get/set program scheduling priority
setregid: setreuid, setregid - set real and/or effective user or group ID
setregid: set real and effective group ID
setregid32: setreuid, setregid - set real and/or effective user or group ID
setresgid: setresuid, setresgid - set real, effective, and saved user or group ID
setresgid: getresgid , getresuid , setresgid , setresuid — get or set real, effective and saved user or group ID
setresgid32: setresuid, setresgid - set real, effective, and saved user or group ID
setresuid: setresuid, setresgid - set real, effective, and saved user or group ID
setresuid: getresgid , getresuid , setresgid , setresuid — get or set real, effective and saved user or group ID
setresuid32: setresuid, setresgid - set real, effective, and saved user or group ID
setreuid: setreuid, setregid - set real and/or effective user or group ID
setreuid: set real and effective user ID's
setreuid32: setreuid, setregid - set real and/or effective user or group ID
setrlimit: getrlimit, setrlimit, prlimit - get/set resource limits
setrlimit: getrlimit , setrlimit — control maximum system resource consumption
setsid: creates a session and sets the process group ID