macOS — System Calls

• 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
• 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