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Table of Contents - intro(2) - introduction to system calls
- a
- accept(2) - accept a connection on a socket
- access(2) - determine accessibility of a file
- acct(2) - enable or disable process accounting
- adjtime(2) - correct the time to synchronize the system clock
- aio_cancel(2) - cancel an asynchronous I/O operation
- aio_error(2) - return error status of an asynchronous I/O operation
- aio_fsync(2) - force outstanding asynchronous operations on a file to the synchronized state
- aio_read(2) - start an asynchronous read operation
- aio_return(2) - return status of an asynchronous I/O operation
- aio_suspend(2) - wait for an asynchronous I/O operation to complete
- aio_write(2) - start asynchronous write operation
- alarm(2) - set a process's alarm clock
- audctl(2) - start or halt the auditing system and set or get audit files
- audswitch(2) - suspend or resume auditing on the current process
- audwrite(2) - write an audit record for a self-auditing process
- b
- bind(2) - bind an address to a socket
- brk(2) - change data segment space allocation
- c
- chdir(2) - change working directory
- chmod(2) - change file mode access permissions
- chown(2) - change owner and group of a file
- chroot(2) - change root directory
- clocks(2) - clock operations
- close(2) - close a file descriptor
- connect(2) - initiate a connection on a socket
- crashconf(2) - configure system crash dumps
- creat(2) - create a new file or rewrite an existing one
- creat64(2) - non-POSIX standard API interfaces to support large files.
- d
- dup(2) - duplicate an open file descriptor
- dup2(2) - duplicate an open file descriptor to a specific slot
- e
- errno(2) - error indicator for function calls
- exec(2) - execute a file
- exit(2) - terminate process
- f
- fcntl(2) - file control
- fork(2) - create a new process
- fsctl(2) - file system control
- fstat(2) - get file status
- fsync(2) - synchronize a file's in-core and on-disk states
- ftime(2) - get date and time more precisely
- g
- getaccess(2) - get a user's effective access rights to a file
- getacl(2) - get access control list (ACL) information (HFS File Systems only)
- getaudid(2) - get the audit ID (aid) for the current process
- getaudproc(2) - get the audit process flag for the calling process
- getcontext(2) - get and set current user context
- getdirentries(2) - get entries from a directory in a file-system-independent format
- getdomainname(2) - get/set name of current Network Information Service domain
- getevent(2) - get events and system calls that are currently being audited
- getfh(2) - return file handle for file on remote node
- getgroups(2) - get group access list
- gethostid(2) - get an identifier for the current host
- gethostname(2) - get name of current host
- getitimer(2) - get/set value of interval timer
- getksym(2) - get information for a global kernel symbol
- getmsg(2) - receive next message from a STREAMS file
- getpagesize(2) - get the current page size
- getpeername(2) - get address of connected peer
- getpid(2) - get process, process group and parent process ID.
- getpriority(2) - get or set process priority
- getprivgrp(2) - get and set special attributes for group
- getrlimit(2) - control maximum resource consumption
- getrusage(2) - get information about resource utilization
- getsid(2) - get session ID
- getsockname(2) - get socket address
- getsockopt(2) - get and set options on sockets
- gettimeofday(2) - get the date and time
- getuid(2) - get real user, effective user, real group, and effective group IDs
- i
- ioctl(2) - control device
- iscomsec(2) - check if the system has been converted to a trusted system.
- k
- kill(2) - send a signal to a process or a group of processes
- killpg(2) - 4.2 BSD-compatible process control facilities
- l
- link(2) - link to a file
- lio_listio(2) - start a list of asynchronous I/O operations
- listen(2) - listen for connections on a socket
- lockf(2) - provide semaphores and record locking on files
- lseek(2) - move read/write file pointer; seek
- lstat(2) - get symbolic link status
- m
- madvise(2) - advise the system of a process's expected paging behavior
- makecontext(2) - manipulate user contexts
- mkdir(2) - make a directory file
- mknod(2) - make directory, special, or ordinary file
- mlock(2) - lock a segment of the process virtual address space in memory
- mlockall(2) - lock a process virtual address space in memory
- mmap(2) - map pages of memory
- modload(2) - load kernel modules on demand
- modpath(2) - change global search path for dynamically loadable kernel modules
- modstat(2) - get information for a dynamically loaded kernel module
- moduload(2) - unload a kernel module on demand
- mount(2) - mount a file system
- mpctl(2) - multiprocessor control
- mprotect(2) - set protection of memory mapping
- mq_close(2) - close a message queue descriptor
- mq_getattr(2) - get status information and attributes associated with a message queue
- mq_notify(2) - register/cancel a notification request with a message queue
- mq_open(2) - create/open a message queue
- mq_receive(2) - receive a message from a message queue
- mq_send(2) - send a message to a message queue
- mq_setattr(2) - set the blocking status of a message queue associated with a descriptor
- mq_unlink(2) - unlink a message queue
- msem_init(2) - initialize a semaphore in a mapped file or anonymous memory region
- msem_lock(2) - lock a semaphore
- msem_remove(2) - remove a semaphore in mapped file or anonymous region
- msem_unlock(2) - unlock a semaphore
- msgctl(2) - message control operations
- msgget(2) - get message queue
- msgop(2) - message operations
- msync(2) - synchronize memory with physical storage
- munlock(2) - unlock a segment of the process virtual address space
- munlockall(2) - unlock the entire virtual address space of a process
- munmap(2) - unmap pages of memory
- n
- nanosleep(2) - high resolution sleep
- nice(2) - change priority of a process
- o
- open(2) - open file for reading or writing
- p
- pathconf(2) - get configurable path name variables
- pause(2) - suspend process until signal
- pipe(2) - create an interprocess channel
- plock(2) - lock process, text, data, stack, or shared library in memory
- poll(2) - monitor I/O conditions on multiple file descriptors
- prealloc(2) - preallocate fast disk storage
- profil(2) - execution time profile
- pstat(2) - get system information
- ptrace(2) - process trace
- putmsg(2) - send a message on a stream
- q
- quotactl(2) - manipulate disk quotas
- r
- read(2) - read from file
- readlink(2) - read the contents of a symbolic link
- reboot(2) - boot the system
- recv(2) - receive a message from a socket
- rename(2) - change the name of a file
- rmdir(2) - remove a directory file
- rtprio(2) - change or read real-time priority
- rtsched(2) - real-time scheduling operations
- s
- select(2) - synchronous I/O multiplexing
- sem_close(2) - close a named POSIX semaphore
- sem_destroy(2) - destroy an unnamed POSIX semaphore
- sem_getvalue(2) - get the value of a POSIX semaphore
- sem_init(2) - initialize an unnamed POSIX semaphore
- sem_open(2) - create/open a named POSIX semaphore
- sem_post(2) - unlock a POSIX semaphore
- sem_unlink(2) - unlink a named POSIX semaphore
- sem_wait(2) - lock a POSIX semaphore
- semctl(2) - semaphore control operations
- semget(2) - get set of semaphores
- semop(2) - semaphore operations
- send(2) - send a message from a socket
- sendfile(2) - send the contents of a file through a socket
- serialize(2) - force target process to run serially with other processes
- setacl(2) - set access control list (ACL) information
- setaudid(2) - set the audit ID (aid) for the current process
- setaudproc(2) - controls process level auditing for the current process and its decendents
- setevent(2) - set current events and system calls which are to be audited
- setgroups(2) - set group access list
- sethostname(2) - set name of host cpu
- setpgid(2) - set process group ID for job control
- setpgrp(2) - set process group ID
- setresuid(2) - set real, effective, and saved user and group IDs
- setreuid(2) - set real and effective user IDs
- setsid(2) - create session and set process group ID
- setuid(2) - set user and group IDs
- shm_open(2) - create/open a shared memory object
- shm_unlink(2) - unlink a shared memory object
- shmctl(2) - shared memory control operations
- shmget(2) - get shared memory segment
- shmop(2) - shared memory operations
- shutdown(2) - shut down a socket
- sigaction(2) - examine and change signal action
- sigaltstack(2) - set and/or get signal alternate stack context.
- sigblock(2) - block signals
- sighold(2V) - signal management
- siginterrupt(2) - allow signals to interrupt functions
- signal(2) - signal management
- sigpending(2) - examine pending signals
- sigprocmask(2) - examine and change blocked signals
- sigqueue(2) - queue a signal to a process
- sigsend(2) - send a signal to a process or a group of processes
- sigsetmask(2) - set current signal mask
- sigspace(2) - assure sufficient signal stack space
- sigstack(2) - set and/or get signal stack context
- sigsuspend(2) - wait for a signal
- sigvector(2) - software signal facilities
- sigwait(2) - synchronously accept a signal
- socket(2) - create an endpoint for communication
- socketpair(2) - create a pair of connected sockets
- stat(2) - get file status
- statfs(2) - get file system statistics
- statvfs(2) - get file system information
- stime(2) - set time and date
- stream(2) - STREAMS enhancements to standard system calls
- stty(2) - control terminal device (Bell Version 6 compatibility)
- swapon(2) - add swap space for interleaved paging/swapping
- symlink(2) - make symbolic link to a file
- sync(2) - update disk
- sysconf(2) - get configurable system variables
- sysfs(2) - get file system type information
- t
- time(2) - get time
- timers(2) - timer operations
- times(2) - get process and child process times
- truncate(2) - truncate a file to a specified length
- ttrace(2) - tracing facility for multithreaded processes
- ttrace_wait(2) - wait for ttrace event
- u
- ualarm(2) - set the interval timer
- ulimit(2) - get and set user limits
- umask(2) - set and get file creation mask
- umount(2) - unmount a file system
- uname(2) - get information about computer system; set node name (system name)
- unlink(2) - remove directory entry; delete file
- usleep(2) - suspend execution for an interval
- ustat(2) - get mounted file system statistics
- utime(2) - set file access and modification times
- utimes(2) - set file access and modification times
- v
- vfork(2) - spawn new process; share virtual memory
- vfsmount(2) - mount a file system
- w
- wait(2) - wait for child process to stop or terminate
- wait3(2) - wait for child process to change state
- waitid(2) - wait for child process to change state
- write(2) - write on a file
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