System Calls

NameSummary
FD_CLR(2), FD_COPY(2), FD_ISSET(2), FD_SET(2), FD_ZERO(2), select(2)synchronous I/O multiplexing
_exit(2) terminate the calling process
accept(2) accept a connection on a socket
access(2), faccessat(2) check accessibility of a file
acct(2) enable or disable process accounting
adjtime(2) correct the time to allow synchronization of the system clock
aio_cancel(2) cancel an outstanding asynchronous I/O operation (REALTIME)
aio_error(2) retrieve error status of asynchronous I/O operation (REALTIME)
aio_read(2) asynchronous read from a file (REALTIME)
aio_return(2) retrieve return status of asynchronous I/O operation (REALTIME)
aio_suspend(2) suspend until asynchronous I/O operations or timeout complete (REALTIME)
aio_write(2) asynchronous write to a file (REALTIME)
audit(2) commit BSM audit record to audit log
auditctl(2) configure system audit parameters
auditon(2) configure system audit parameters
bind(2) bind a name to a socket
brk(2), sbrk(2) change data segment size
chdir(2), fchdir(2) change current working directory
chflags(2), fchflags(2) set file flags
chmod(2), fchmod(2), fchmodat(2)change mode of file
chown(2), fchown(2), lchown(2), fchownat(2)change owner and group of a file
chroot(2) change root directory
clonefile(2) create copy on write clones of files
close(2) delete a descriptor
connect(2) initiate a connection on a socket
connectx(2) initiate a connection on a socket
creat(2) create a new file
disconnectx(2) disconnects a connection on a socket
dup(2), dup2(2) duplicate an existing file descriptor
exchangedata(2) atomically exchange data between two files
execve(2) execute a file
fcntl(2) file control
fhopen(2) open a file by file handle
fileport_makeport(2), fileport_makefd(2)manipulate fileports
flock(2) apply or remove an advisory lock on an open file
fork(2) create a new process
fpathconf(2), pathconf(2)get configurable pathname variables
fs_snapshot_create(2) create read only snapshot of a mounted filesystem
fsgetpath(2) get the path associated with filesystem node identifier (inode number/link id/object id)
fstat(2), fstat64(2), lstat(2), lstat64(2), stat(2), stat64(2), fstatat(2)get file status
fsync(2) synchronize a file's in-core state with that on disk
ftruncate(2), truncate(2)truncate or extend a file to a specified length
futimens(2), utimensat(2)set file access and modification times
futimes(2), utimes(2) set file access and modification times
getattrlist(2), fgetattrlist(2), getattrlistat(2)get file system attributes
getattrlistbulk(2) get file system attributes for multiple directory entries
getaudit_addr(2), getaudit(NOW DEPRECATED)(2)retrieve audit session state
getauid(2) retrieve audit user ID
getdirentries(2) get directory entries in a filesystem independent format
getdirentriesattr(2), getdirentriesattr(NOW DEPRECATED)(2)get file system attributes for multiple directory entries
getdtablesize(2) get descriptor table size
getegid(2), getgid(2) get group process identification
getentropy(2) get entropy
geteuid(2), getuid(2) get user identification
getfh(2) get file handle
getfsstat(2) get list of all mounted file systems
getgroups(2) get group access list
gethostuuid(2) return a unique identifier for the current machine
getitimer(2), setitimer(2)get/set value of interval timer
getlogin(2), setlogin(2)get/set login name
getpeername(2) get address of connected peer
getpgid(2), getpgrp(2) get process group
getpid(2), getppid(2) get parent or calling process identification
getpriority(2), setpriority(2)get/set program scheduling priority
getrlimit(2), setrlimit(2)control maximum system resource consumption
getrusage(2) get information about resource utilization
getsid(2) get process session
getsockname(2) get socket name
getsockopt(2), setsockopt(2)get and set options on sockets
gettimeofday(2), settimeofday(2)get/set date and time
getxattr(2), fgetxattr(2)get an extended attribute value
i386_get_ldt(2), i386_set_ldt(2)manage i386 per-process Local Descriptor Table entries
intro(2) introduction to system calls and error numbers
ioctl(2) control device
issetugid(2) is current process tainted by uid or gid changes
kill(2) send signal to a process
killpg(2) send signal to a process group
kqueue(2), kevent(2), kevent64(2)and kevent_qos kernel event notification mechanism
link(2), linkat(2) make a hard file link
listen(2) listen for connections on a socket
listxattr(2), flistxattr(2)list extended attribute names
lseek(2) reposition read/write file offset
madvise(2), posix_madvise(2)give advice about use of memory
mincore(2) determine residency of memory pages
minherit(2) control the inheritance of pages
mkdir(2), mkdirat(2) make a directory file
mkfifo(2), mkfifoat(2) make a fifo file
mknod(2), mknodat(2) make a special file node
mlock(2), munlock(2) lock (unlock) physical pages in memory
mmap(2) allocate memory, or map files or devices into memory
mount(2), fmount(2), unmount(2)mount or dismount a filesystem
mprotect(2) control the protection of pages
msync(2) synchronize a mapped region
munmap(2) remove a mapping
nanosleep(2) suspend thread execution for an interval measured in nanoseconds
nfsclnt(2) NFS client services
nfssvc(2) NFS services
open(2), openat(2) open or create a file for reading or writing
pipe(2) create descriptor pair for interprocess communication
poll(2) synchronous I/O multiplexing
posix_spawn(2), posix_spawn posix_spawnp(2)spawn a process
pread(2), read(2), preadv(2), readv(2)read input
pselect(2) synchronous I/O multiplexing a la POSIX.1g
pthread_kill(2) send a signal to a specified thread
pthread_setugid_np(2) Set the per-thread userid and single groupid
pthread_sigmask(2) examine and/or change a thread's signal mask
ptrace(2) process tracing and debugging
pwrite(2), write(2), pwritev(2), writev(2)write output
quotactl(2) manipulate filesystem quotas
readlink(2), readlinkat(2), freadlink(2)read value of a symbolic link
reboot(2) reboot system or halt processor
recv(2), recvfrom(2), recvmsg(2)receive a message from a socket
removexattr(2), fremovexattr(2)remove an extended attribute value
rename(2), renameat(2), renamex_np(2), renameatx_np(2)change the name of a file
revoke(2) revoke file access
rmdir(2) remove a directory file
searchfs(2) search a volume quickly
sem_close(2) close a named semaphore
sem_open(2) initialize and open a named semaphore
sem_post(2) unlock a semaphore
sem_trywait(2), sem_wait(2)lock a semaphore
sem_unlink(2) remove a named semaphore
semctl(2) control operations on a semaphore set
semget(2) obtain a semaphore id
semop(2) atomic array of operations on a semaphore set
send(2), sendmsg(2), sendto(2)send a message from a socket
sendfile(2) send a file to a socket
setattrlist(2), fsetattrlist(2), setattrlistat(2)set file system attributes
setaudit_addr(2), setaudit(NOW DEPRECATED)(2)set audit session state
setauid(2) set audit indentifier
setegid(2), seteuid(2), setgid(2), setuid(2)set user and group ID
setgroups(2) set group access list
setpgid(2), setpgrp(2) set process group
setregid(2) set real and effective group ID
setreuid(2) set real and effective user IDs
setsid(2) create session and set process group ID
setxattr(2), fsetxattr(2)set an extended attribute value
shm_open(2) open a shared memory object
shm_unlink(2) remove shared memory object
shmat(2), shmdt(2) map/unmap shared memory
shmctl(2) shared memory control operations
shmget(2) get shared memory area identifier
shutdown(2) shut down part of a full-duplex connection
sigaction(2) software signal facilities
sigaltstack(2) set and/or get signal stack context
sigblock(2) block signals
sigpause(2) atomically release blocked signals and wait for interrupt
sigpending(2) get pending signals
sigprocmask(2) manipulate current signal mask
sigsetmask(2) set current signal mask
sigstack(2) set and/or get signal stack context
sigsuspend(2) atomically release blocked signals and wait for interrupt
sigvec(2) software signal facilities
sigwait(2) select a set of signals
socket(2) create an endpoint for communication
socketpair(2) create a pair of connected sockets
statfs(2), statfs64(2), fstatfs(2), fstatfs64(2)get file system statistics
symlink(2), symlinkat(2)make symbolic link to a file
sync(2) synchronize disk block in-core status with that on disk
umask(2) set file creation mode mask
undelete(2) attempt to recover a deleted file
unlink(2), unlinkat(2) remove directory entry
vfork(2) deprecated system call to create a new process
wait(2), wait3(2), wait4(2), waitpid(2)wait for process termination