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P

• paste — merge corresponding or subsequent lines of files
• patch — apply changes to files
• pathchk — check pathnames
• pathconf(), fpathconf — get configurable pathname variables
• pause() — suspend the thread until a signal is received
• pax — portable archive interchange
• pclose() — close a pipe stream to or from a process
• perror() — write error messages to standard error
• pipe(), pipe2 — create an interprocess channel
• pipe2(), pipe — create an interprocess channel
• poll(), ppoll — input/output multiplexing
• poll.h — definitions for the poll() function
• popen() — initiate pipe streams to or from a process
• posix_close(), close — close a file descriptor
• posix_devctl() — device control
• posix_fadvise() — file advisory information (ADVANCED REALTIME)
• posix_fallocate() — file space control (ADVANCED REALTIME)
• posix_getdents() — read directory entries
• posix_madvise() — memory advisory information and alignment control (ADVANCED REALTIME)
• posix_memalign() — aligned memory allocation (ADVANCED REALTIME)
• posix_mem_offset() — find offset and length of a mapped typed memory block (ADVANCED REALTIME)
• posix_openpt() — open a pseudo-terminal device
• posix_spawn(), posix_spawnp — spawn a process (ADVANCED REALTIME)
• posix_spawnattr_destroy(), posix_spawnattr_init — destroy and initialize spawn attributes object (ADVANCED REALTIME)
• posix_spawnattr_getflags(), posix_spawnattr_setflags — get and set the spawn-flags attribute of a spawn attributes object (ADVANCED REALTIME)
• posix_spawnattr_getpgroup(), posix_spawnattr_setpgroup — get and set the spawn-pgroup attribute of a spawn attributes object (ADVANCED REALTIME)
• posix_spawnattr_getschedparam(), posix_spawnattr_setschedparam — get and set the spawn-schedparam attribute of a spawn attributes object (ADVANCED REALTIME)
• posix_spawnattr_getschedpolicy(), posix_spawnattr_setschedpolicy — get and set the spawn-schedpolicy attribute of a spawn attributes object (ADVANCED REALTIME)
• posix_spawnattr_getsigdefault(), posix_spawnattr_setsigdefault — get and set the spawn-sigdefault attribute of a spawn attributes object (ADVANCED REALTIME)
• posix_spawnattr_getsigmask(), posix_spawnattr_setsigmask — get and set the spawn-sigmask attribute of a spawn attributes object (ADVANCED REALTIME)
• posix_spawnattr_init(), posix_spawnattr_destroy — destroy and initialize spawn attributes object (ADVANCED REALTIME)
• posix_spawnattr_setflags(), posix_spawnattr_getflags — get and set the spawn-flags attribute of a spawn attributes object (ADVANCED REALTIME)
• posix_spawnattr_setpgroup(), posix_spawnattr_getpgroup — get and set the spawn-pgroup attribute of a spawn attributes object (ADVANCED REALTIME)
• posix_spawnattr_setschedparam(), posix_spawnattr_getschedparam — get and set the spawn-schedparam attribute of a spawn attributes object (ADVANCED REALTIME)
• posix_spawnattr_setschedpolicy(), posix_spawnattr_getschedpolicy — get and set the spawn-schedpolicy attribute of a spawn attributes object (ADVANCED REALTIME)
• posix_spawnattr_setsigdefault(), posix_spawnattr_getsigdefault — get and set the spawn-sigdefault attribute of a spawn attributes object (ADVANCED REALTIME)
• posix_spawnattr_setsigmask(), posix_spawnattr_getsigmask — get and set the spawn-sigmask attribute of a spawn attributes object (ADVANCED REALTIME)
• posix_spawnp(), posix_spawn — spawn a process (ADVANCED REALTIME)
• posix_spawn_file_actions_addchdir(), posix_spawn_file_actions_addfchdir — add chdir or fchdir action to spawn file actions object (ADVANCED REALTIME)
• posix_spawn_file_actions_addclose(), posix_spawn_file_actions_addopen — add close or open action to spawn file actions object (ADVANCED REALTIME)
• posix_spawn_file_actions_adddup2() — add dup2 action to spawn file actions object (ADVANCED REALTIME)
• posix_spawn_file_actions_addfchdir(), posix_spawn_file_actions_addchdir — add chdir or fchdir action to spawn file actions object (ADVANCED REALTIME)
• posix_spawn_file_actions_addopen(), posix_spawn_file_actions_addclose — add close or open action to spawn file actions object (ADVANCED REALTIME)
• posix_spawn_file_actions_destroy(), posix_spawn_file_actions_init — destroy and initialize spawn file actions object (ADVANCED REALTIME)
• posix_spawn_file_actions_init(), posix_spawn_file_actions_destroy — destroy and initialize spawn file actions object (ADVANCED REALTIME)
• posix_typed_mem_get_info() — query typed memory information (ADVANCED REALTIME)
• posix_typed_mem_open() — open a typed memory object (ADVANCED REALTIME)
• pow(), powf, powl — power function
• powf(), pow, powl — power function
• powl(), pow, powf — power function
• ppoll(), poll — input/output multiplexing
• pr — print files
• pread(), read — read from a file
• printf — write formatted output
• printf(), asprintf, dprintf, fprintf, snprintf, sprintf — print formatted output
• prs — print an SCCS file (DEVELOPMENT)
• ps — report process status
• pselect(), select — synchronous I/O multiplexing
• psiginfo(), psignal — write signal information to standard error
• psignal(), psiginfo — write signal information to standard error
• pthread.h — threads
• pthread_atfork() — register fork handlers
• pthread_attr_destroy(), pthread_attr_init — destroy and initialize the thread attributes object
• pthread_attr_getdetachstate(), pthread_attr_setdetachstate — get and set the detachstate attribute
• pthread_attr_getguardsize(), pthread_attr_setguardsize — get and set the thread guardsize attribute
• pthread_attr_getinheritsched(), pthread_attr_setinheritsched — get and set the inheritsched attribute (REALTIME THREADS)
• pthread_attr_getschedparam(), pthread_attr_setschedparam — get and set the schedparam attribute
• pthread_attr_getschedpolicy(), pthread_attr_setschedpolicy — get and set the schedpolicy attribute (REALTIME THREADS)
• pthread_attr_getscope(), pthread_attr_setscope — get and set the contentionscope attribute (REALTIME THREADS)
• pthread_attr_getstack(), pthread_attr_setstack — get and set stack attributes
• pthread_attr_getstacksize(), pthread_attr_setstacksize — get and set the stacksize attribute
• pthread_attr_init(), pthread_attr_destroy — destroy and initialize the thread attributes object
• pthread_attr_setdetachstate(), pthread_attr_getdetachstate — get and set the detachstate attribute
• pthread_attr_setguardsize(), pthread_attr_getguardsize — get and set the thread guardsize attribute
• pthread_attr_setinheritsched(), pthread_attr_getinheritsched — get and set the inheritsched attribute (REALTIME THREADS)
• pthread_attr_setschedparam(), pthread_attr_getschedparam — get and set the schedparam attribute
• pthread_attr_setschedpolicy(), pthread_attr_getschedpolicy — get and set the schedpolicy attribute (REALTIME THREADS)
• pthread_attr_setscope(), pthread_attr_getscope — get and set the contentionscope attribute (REALTIME THREADS)
• pthread_attr_setstack(), pthread_attr_getstack — get and set stack attributes
• pthread_attr_setstacksize(), pthread_attr_getstacksize — get and set the stacksize attribute
• pthread_barrierattr_destroy(), pthread_barrierattr_init — destroy and initialize the barrier attributes object
• pthread_barrierattr_getpshared(), pthread_barrierattr_setpshared — get and set the process-shared attribute of the barrier attributes object
• pthread_barrierattr_init(), pthread_barrierattr_destroy — destroy and initialize the barrier attributes object
• pthread_barrierattr_setpshared(), pthread_barrierattr_getpshared — get and set the process-shared attribute of the barrier attributes object
• pthread_barrier_destroy(), pthread_barrier_init — destroy and initialize a barrier object
• pthread_barrier_init(), pthread_barrier_destroy — destroy and initialize a barrier object
• pthread_barrier_wait() — synchronize at a barrier
• pthread_cancel() — cancel execution of a thread
• pthread_cleanup_pop(), pthread_cleanup_push — establish cancellation handlers
• pthread_cleanup_push(), pthread_cleanup_pop — establish cancellation handlers
• pthread_condattr_destroy(), pthread_condattr_init — destroy and initialize the condition variable attributes object
• pthread_condattr_getclock(), pthread_condattr_setclock — get and set the clock selection condition variable attribute
• pthread_condattr_getpshared(), pthread_condattr_setpshared — get and set the process-shared condition variable attributes
• pthread_condattr_init(), pthread_condattr_destroy — destroy and initialize the condition variable attributes object
• pthread_condattr_setclock(), pthread_condattr_getclock — get and set the clock selection condition variable attribute
• pthread_condattr_setpshared(), pthread_condattr_getpshared — get and set the process-shared condition variable attributes
• pthread_cond_broadcast(), pthread_cond_signal — broadcast or signal a condition
• pthread_cond_clockwait(), pthread_cond_timedwait, pthread_cond_wait — wait on a condition
• pthread_cond_destroy(), pthread_cond_init — destroy and initialize condition variables
• pthread_cond_init(), pthread_cond_destroy — destroy and initialize condition variables
• pthread_cond_signal(), pthread_cond_broadcast — broadcast or signal a condition
• pthread_cond_timedwait(), pthread_cond_clockwait, pthread_cond_wait — wait on a condition
• pthread_cond_wait(), pthread_cond_clockwait, pthread_cond_timedwait — wait on a condition
• pthread_create() — thread creation
• pthread_detach() — detach a thread
• pthread_equal() — compare thread IDs
• pthread_exit() — thread termination
• pthread_getcpuclockid() — access a thread CPU-time clock (ADVANCED REALTIME THREADS)
• pthread_getschedparam(), pthread_setschedparam — dynamic thread scheduling parameters access (REALTIME THREADS)
• pthread_getspecific(), pthread_setspecific — thread-specific data management
• pthread_join() — wait for thread termination
• pthread_key_create() — thread-specific data key creation
• pthread_key_delete() — thread-specific data key deletion
• pthread_kill() — send a signal to a thread
• pthread_mutexattr_destroy(), pthread_mutexattr_init — destroy and initialize the mutex attributes object
• pthread_mutexattr_getprioceiling(), pthread_mutexattr_setprioceiling — get and set the prioceiling attribute of the mutex attributes object (REALTIME THREADS)
• pthread_mutexattr_getprotocol(), pthread_mutexattr_setprotocol — get and set the protocol attribute of the mutex attributes object (REALTIME THREADS)
• pthread_mutexattr_getpshared(), pthread_mutexattr_setpshared — get and set the process-shared attribute
• pthread_mutexattr_getrobust(), pthread_mutexattr_setrobust — get and set the mutex robust attribute
• pthread_mutexattr_gettype(), pthread_mutexattr_settype — get and set the mutex type attribute
• pthread_mutexattr_init(), pthread_mutexattr_destroy — destroy and initialize the mutex attributes object
• pthread_mutexattr_setprioceiling(), pthread_mutexattr_getprioceiling — get and set the prioceiling attribute of the mutex attributes object (REALTIME THREADS)
• pthread_mutexattr_setprotocol(), pthread_mutexattr_getprotocol — get and set the protocol attribute of the mutex attributes object (REALTIME THREADS)
• pthread_mutexattr_setpshared(), pthread_mutexattr_getpshared — get and set the process-shared attribute
• pthread_mutexattr_setrobust(), pthread_mutexattr_getrobust — get and set the mutex robust attribute
• pthread_mutexattr_settype(), pthread_mutexattr_gettype — get and set the mutex type attribute
• pthread_mutex_clocklock(), pthread_mutex_timedlock — lock a mutex
• pthread_mutex_consistent() — mark state protected by robust mutex as consistent
• pthread_mutex_destroy(), pthread_mutex_init — destroy and initialize a mutex
• pthread_mutex_getprioceiling(), pthread_mutex_setprioceiling — get and set the priority ceiling of a mutex (REALTIME THREADS)
• pthread_mutex_init(), pthread_mutex_destroy — destroy and initialize a mutex
• pthread_mutex_lock(), pthread_mutex_trylock, pthread_mutex_unlock — lock and unlock a mutex
• pthread_mutex_setprioceiling(), pthread_mutex_getprioceiling — get and set the priority ceiling of a mutex (REALTIME THREADS)
• pthread_mutex_timedlock(), pthread_mutex_clocklock — lock a mutex
• pthread_mutex_trylock(), pthread_mutex_lock, pthread_mutex_unlock — lock and unlock a mutex
• pthread_mutex_unlock(), pthread_mutex_lock, pthread_mutex_trylock — lock and unlock a mutex
• pthread_once() — dynamic package initialization
• pthread_rwlockattr_destroy(), pthread_rwlockattr_init — destroy and initialize the read-write lock attributes object
• pthread_rwlockattr_getpshared(), pthread_rwlockattr_setpshared — get and set the process-shared attribute of the read-write lock attributes object
• pthread_rwlockattr_init(), pthread_rwlockattr_destroy — destroy and initialize the read-write lock attributes object
• pthread_rwlockattr_setpshared(), pthread_rwlockattr_getpshared — get and set the process-shared attribute of the read-write lock attributes object
• pthread_rwlock_clockrdlock(), pthread_rwlock_timedrdlock — lock a read-write lock for reading
• pthread_rwlock_clockwrlock(), pthread_rwlock_timedwrlock — lock a read-write lock for writing
• pthread_rwlock_destroy(), pthread_rwlock_init — destroy and initialize a read-write lock object
• pthread_rwlock_init(), pthread_rwlock_destroy — destroy and initialize a read-write lock object
• pthread_rwlock_rdlock(), pthread_rwlock_tryrdlock — lock a read-write lock object for reading
• pthread_rwlock_timedrdlock(), pthread_rwlock_clockrdlock — lock a read-write lock for reading
• pthread_rwlock_timedwrlock(), pthread_rwlock_clockwrlock — lock a read-write lock for writing
• pthread_rwlock_tryrdlock(), pthread_rwlock_rdlock — lock a read-write lock object for reading
• pthread_rwlock_trywrlock(), pthread_rwlock_wrlock — lock a read-write lock object for writing
• pthread_rwlock_unlock() — unlock a read-write lock object
• pthread_rwlock_wrlock(), pthread_rwlock_trywrlock — lock a read-write lock object for writing
• pthread_self() — get the calling thread ID
• pthread_setcancelstate(), pthread_setcanceltype, pthread_testcancel — set cancelability state
• pthread_setcanceltype(), pthread_setcancelstate, pthread_testcancel — set cancelability state
• pthread_setschedparam(), pthread_getschedparam — dynamic thread scheduling parameters access (REALTIME THREADS)
• pthread_setschedprio() — dynamic thread scheduling parameters access (REALTIME THREADS)
• pthread_setspecific(), pthread_getspecific — thread-specific data management
• pthread_sigmask(), sigprocmask — examine and change blocked signals
• pthread_spin_destroy(), pthread_spin_init — destroy or initialize a spin lock object
• pthread_spin_init(), pthread_spin_destroy — destroy or initialize a spin lock object
• pthread_spin_lock(), pthread_spin_trylock — lock a spin lock object
• pthread_spin_trylock(), pthread_spin_lock — lock a spin lock object
• pthread_spin_unlock() — unlock a spin lock object
• pthread_testcancel(), pthread_setcancelstate, pthread_setcanceltype — set cancelability state
• ptsname(), ptsname_r — get name of the subsidiary pseudo-terminal device
• ptsname_r(), ptsname — get name of the subsidiary pseudo-terminal device
• putc() — put a byte on a stream
• putchar() — put a byte on a stdout stream
• putchar_unlocked(), getc_unlocked, getchar_unlocked, putc_unlocked — stdio with explicit client locking
• putc_unlocked(), getc_unlocked, getchar_unlocked, putchar_unlocked — stdio with explicit client locking
• putenv() — change or add a value to an environment
• puts() — put a string on standard output
• pututxline(), endutxent, getutxent, getutxid, getutxline, setutxent — user accounting database functions
• putwc() — put a wide character on a stream
• putwchar() — put a wide character on a stdout stream
• pwd — return working directory name
• pwd.h — password structure
• pwrite(), write — write on a file

• 3.248 Page
• 3.249 Page Size
• 3.250 Parameter
• 3.251 Parent Directory
• 3.252 Parent Process
• 3.253 Parent Process ID
• 3.254 Pathname
• 3.255 Pathname Component
• 3.256 Path Prefix
• 3.257 Pattern
• 3.258 Period Character (<period>)
• 3.259 Permissions
• 3.260 Persistence
• 3.261 Pipe
• 3.262 Polling
• 3.263 Portable Character Set
• 3.264 Portable Filename
• 3.265 Portable Filename Character Set
• 3.266 Portable Messages Object Source File (or Dot-Po File)
• 3.267 Positional Parameter
• 3.268 Positive
• 3.269 Preallocation
• 3.270 Preempted Process (or Thread)
• 3.271 Previous Job
• 3.272 Printable Character
• 3.273 Printable File
• 3.274 Priority
• 3.275 Priority Inversion
• 3.276 Priority Scheduling
• 3.277 Priority-Based Scheduling
• 3.278 Privilege
• 3.279 Process
• 3.280 Process Group
• 3.281 Process Group ID
• 3.282 Process Group Leader
• 3.283 Process Group Lifetime
• 3.284 Process ID
• 3.285 Process Lifetime
• 3.286 Process Memory Locking
• 3.287 Process Termination
• 3.288 Process Virtual Time
• 3.289 Process-Owned File Lock
• 3.290 Process-To-Process Communication
• 3.291 Program
• 3.292 Protocol
• 3.293 Pseudo-Terminal
• 4.16 Pathname Resolution
• 4.17 Process ID Reuse
• 6.1 Portable Character Set
• 7.2 POSIX Locale
• 11.2 Parameters that Can be Set