P

The functions, macros, and data structures in the C library are described here in alphabetical order.

A ¦ B ¦ C ¦ D ¦ E ¦ F ¦ G ¦ H ¦ I ¦ J ¦ K ¦ L ¦ M ¦ N ¦ O ¦ P ¦ Q ¦ R ¦ S ¦ T ¦ U ¦ V ¦ W ¦ X ¦ Y ¦ Z

The following are described elsewhere:

For information about:	See:
pci_*()	PCI Server User's Guide
ppsparse()	Persistent Publish/Subscribe Developer's Guide
PTHREAD_BARRIER_INITIALIZER()	pthread_barrier_init()
pselect()	select()

This chapter describes the API components whose names begin with “P”.

pathconf()
Return the value of a configurable limit
pathfind(), pathfind_r()
Search for a file in a list of directories
pathmgr_link()
Create a node in the path space that represents the mountpoint of a device or filesystem
pathmgr_symlink()
Create a symlink
pathmgr_unlink()
Remove a link
pause()
Suspend the calling thread until it runs a signal handler
pci_*()
Connect to the PCI server
pclose()
Close a pipe
perror()
Print an error message associated with errno
pipe()
Create a pipe
poll()
Multiplex input/output over a set of file descriptors
popen()
Execute a command, creating a pipe to it
posix_fadvise(), posix_fadvise64()
Provide advisory information about the expected use of a file
posix_fallocate(), posix_fallocate64()
Allocate space for a file on the filesystem
posix_madvise()
Provide advisory information about the expected use of memory
posix_mem_offset(), posix_mem_offset64()
Get the offset and length of a mapped memory block
posix_memalign()
Allocate aligned memory
posix_openpt()
Open a pseudo-terminal device
posix_spawn(), posix_spawnp()
Spawn a process
posix_spawn_file_actions_addclose()
Add a “close a file descriptor” action to a spawn file actions object
posix_spawn_file_actions_adddup2()
Add a “duplicate a file descriptor” action to a spawn file actions object
posix_spawn_file_actions_addopen()
Add an “open a file” action to a spawn file action object
posix_spawn_file_actions_destroy()
Destroy a spawn file actions object
posix_spawn_file_actions_init()
Initialize a spawn file actions object
posix_spawnattr_destroy()
Destroy a spawn attributes object
posix_spawnattr_getcred()
Get the user and group ID attributes from a spawn attributes object
posix_spawnattr_getflags()
Get the POSIX flags from a spawn attributes object
posix_spawnattr_getnode()
Get the remote node attribute from a spawn attributes object
posix_spawnattr_getpgroup()
Get the process group attribute of a spawn attributes object
posix_spawnattr_getrunmask()
Get the runmask attribute from a spawn attributes object
posix_spawnattr_getschedparam()
Get the scheduling parameters attribute of a spawn attributes object
posix_spawnattr_getschedpolicy()
Get the scheduling policy attribute of a spawn attributes object
posix_spawnattr_getsigdefault()
Get the “default signals” attribute of a spawn attributes object
posix_spawnattr_getsigignore()
Get the “ignored signals” attribute from a spawn attributes object
posix_spawnattr_getsigmask()
Get the signal mask attribute of a spawn attributes object
posix_spawnattr_getstackmax()
Get the maximum stack size attribute from a spawn attributes object
posix_spawnattr_gettypeid()
Get the type identifier of a spawn attributes object
posix_spawnattr_getxflags()
Get the POSIX flags and the QNX Neutrino extended flags from a spawn attributes object
posix_spawnattr_init()
Initialize a spawn attributes object
posix_spawnattr_setasid()
Set the address space ID attribute in a spawn attributes object
posix_spawnattr_setcred()
Set the user and group ID attributes in a spawn attributes object
posix_spawnattr_setflags()
Set the POSIX flags in a spawn attributes object
posix_spawnattr_setnode()
Set the remote node attribute in a spawn attributes object
posix_spawnattr_setpgroup()
Set the process group attribute in a spawn attributes object
posix_spawnattr_setrunmask()
Set the runmask attribute in a spawn attributes object
posix_spawnattr_setschedparam()
Set the scheduling parameters attribute of a spawn attributes object
posix_spawnattr_setschedpolicy()
Set the scheduling policy attribute of a spawn attributes object
posix_spawnattr_setsigdefault()
Set the “default signals” attribute of a spawn attributes object
posix_spawnattr_setsigignore()
Set the “ignored signals” attribute of a spawn attributes object
posix_spawnattr_setsigmask()
Set the signal mask attribute of a spawn attributes object
posix_spawnattr_setstackmax()
Set the maximum stack size attribute in a spawn attributes object
posix_spawnattr_settypeid()
Set the type identifier of a spawn attributes object
posix_spawnattr_setxflags()
Set the POSIX flags and the QNX Neutrino extended flags in a spawn attributes object
posix_typed_mem_get_info()
Get information about a typed memory object
posix_typed_mem_open()
Open a typed memory object
pow(), powf(), powl()
Raise a number to a given power
pread(), pread64()
Read from a file without moving the file pointer
printf()
Write formatted output to stdout
procmgr_ability()
Control a process's ability to perform certain operations
procmgr_ability_create()
Create a process-manager ability
procmgr_ability_lookup()
Look up a process-manager ability
procmgr_daemon()
Run a process in the background
procmgr_event_notify()
Ask to be notified of system-wide events
procmgr_event_notify_add()
Add a request to be notified of system-wide events
procmgr_event_notify_delete()
Delete a request to be notified of system-wide events
procmgr_event_trigger(), procmgr_event_trigger_updateable()
Trigger a system-wide event
procmgr_guardian()
Let a process take over as a parent
procmgr_session(), procmgr_session_ext()
Provide process manager session support
procmgr_set_type_id()
Allows a function to change its own type identifier
procmgr_timer_tolerance()
Get or set the default timer tolerance for a process
procmgr_value_current()
Get the current value of an item being monitored
procmgr_value_notify_add()
Add an event to be triggered when a monitored value crosses a trigger point
__progname
The basename of the program being executed
protoent
Structure for information from the protocol database
pthread_abort()
Unconditionally terminate the target thread
pthread_atfork()
Register fork handlers
pthread_attr_destroy()
Destroy a thread-attribute object
pthread_attr_getdetachstate()
Get the thread detach state attribute
pthread_attr_getguardsize()
Get the size of the thread's guard area
pthread_attr_getinheritsched()
Get a thread's inherit-scheduling attribute
pthread_attr_getschedparam()
Get the thread scheduling parameters attribute
pthread_attr_getschedpolicy()
Get the thread scheduling policy attribute
pthread_attr_getscope()
Get the thread contention scope attribute
pthread_attr_getstack()
Get the thread-creation stack attributes
pthread_attr_getstackaddr()
Get the thread stack address attribute
pthread_attr_getstacklazy()
Get the thread lazy-stack attribute
pthread_attr_getstackprealloc()
Get the amount of memory to preallocate for a thread's MAP_LAZY stack
pthread_attr_getstacksize()
Get the thread stack-size attribute
pthread_attr_getsuspendstate_np()
Get the thread suspend state attribute
pthread_attr_init()
Initialize a thread-attribute object
pthread_attr_setdetachstate()
Set the thread detach state attribute
pthread_attr_setguardsize()
Set the size of the thread's guard area
pthread_attr_setinheritsched()
Set the thread's inherit-scheduling attribute
pthread_attr_setschedparam()
Set a thread's scheduling parameters attribute
pthread_attr_setschedpolicy()
Set the thread scheduling policy attribute
pthread_attr_setscope()
Set the thread contention scope attribute
pthread_attr_setstack()
Set the thread-creation stack attributes
pthread_attr_setstackaddr()
Set the thread stack address attribute
pthread_attr_setstacklazy()
Set the thread lazy-stack attribute
pthread_attr_setstackprealloc()
Set the amount of memory to preallocate for a thread's MAP_LAZY stack
pthread_attr_setstacksize()
Set the thread stack-size attribute
pthread_attr_setsuspendstate_np()
Set the thread suspend state attribute
pthread_barrier_destroy()
Destroy a barrier object
pthread_barrier_init()
Initialize a barrier object
pthread_barrier_wait()
Synchronize participating threads at the barrier
pthread_barrierattr_destroy()
Destroy a barrier-attributes object
pthread_barrierattr_getpshared()
Get the value of a barrier's process-shared attribute
pthread_barrierattr_init()
Initialize a barrier attributes object
pthread_barrierattr_setpshared()
Set the value of a barrier's process-shared attribute
pthread_cancel()
Cancel a thread
pthread_cleanup_pop()
Pop a function off of a thread's cancellation-cleanup stack
pthread_cleanup_push()
Push a function onto a thread's cancellation-cleanup stack
pthread_cond_broadcast()
Unblock threads waiting on a condition
pthread_cond_destroy()
Destroy a condition variable
pthread_cond_init()
Initialize a condition variable
pthread_cond_signal()
Unblock a thread that's waiting on a condition variable
pthread_cond_timedwait()
Wait on a condition variable, with a time limit
pthread_cond_wait()
Wait on a condition variable
pthread_condattr_destroy()
Destroy a condition-variable attribute object
pthread_condattr_getclock()
Get the clock attribute from a condition-variable attribute object
pthread_condattr_getpshared()
Get the process-shared attribute from a condition variable attribute object
pthread_condattr_init()
Initialize the attribute object for creating condition variables
pthread_condattr_setclock()
Set the clock attribute of a condition-variable attribute object
pthread_condattr_setpshared()
Set the process-shared attribute in a condition variable attribute object
pthread_create()
Create a thread
pthread_detach()
Detach a thread from a process
pthread_equal()
Compare two thread IDs
pthread_exit()
Terminate a thread
pthread_getconcurrency()
Get the level of thread concurrency
pthread_getcpuclockid()
Return the clock ID of the CPU-time clock from a specified thread
pthread_getname_np()
Retrieve the name of a thread
pthread_getschedparam()
Get a thread's scheduling parameters
pthread_getspecific()
Get a thread-specific data value
pthread_join()
Join thread
pthread_key_create()
Create a thread-specific data key
pthread_key_delete()
Delete a thread-specific data key
pthread_kill()
Send a signal to a thread
pthread_mutex_consistent()
Mark as consistent the state that's protected by a mutex
pthread_mutex_destroy()
Destroy a mutex
pthread_mutex_getprioceiling()
Get a mutex's priority ceiling
pthread_mutex_init()
Initialize a mutex
pthread_mutex_lock()
Lock a mutex
pthread_mutex_setprioceiling()
Set a mutex's priority ceiling
pthread_mutex_timedlock(), pthread_mutex_timedlock_monotonic()
Lock a mutex, with a time limit
pthread_mutex_trylock()
Attempt to lock a mutex
pthread_mutex_unlock()
Unlock a mutex
pthread_mutex_wakeup_np()
Unblock any threads that are waiting on a mutex
pthread_mutexattr_destroy()
Destroy mutex attribute object
pthread_mutexattr_getprioceiling()
Get the priority ceiling of a mutex attribute object
pthread_mutexattr_getprotocol()
Get a mutex's scheduling protocol
pthread_mutexattr_getpshared()
Get the process-shared attribute from a mutex attribute object
pthread_mutexattr_getrecursive()
Get the recursive attribute from a mutex attribute object
pthread_mutexattr_getrobust()
Get the robust attribute from a mutex attribute object
pthread_mutexattr_gettype()
Get a mutex type
pthread_mutexattr_getwakeup_np()
Get the wake-up attribute of a mutex
pthread_mutexattr_init()
Initialize a mutex attribute object
pthread_mutexattr_setprioceiling()
Set the priority ceiling of a mutex attribute object
pthread_mutexattr_setprotocol()
Set a mutex's scheduling protocol
pthread_mutexattr_setpshared()
Set the process-shared attribute in mutex attribute object
pthread_mutexattr_setrecursive()
Set the recursive attribute in mutex attribute object
pthread_mutexattr_setrobust()
Set the robust attribute in a mutex attribute object
pthread_mutexattr_settype()
Set a mutex type
pthread_mutexattr_setwakeup_np()
Set the wake-up attribute of a mutex
pthread_once()
Dynamic package initialization
pthread_rwlock_destroy()
Destroy a read-write lock
pthread_rwlock_init()
Initialize a read-write lock
pthread_rwlock_rdlock()
Acquire a shared read lock on a read-write lock
pthread_rwlock_timedrdlock()
Lock a read-write lock for reading
pthread_rwlock_timedwrlock()
Lock a read-write lock for writing
pthread_rwlock_tryrdlock()
Attempt to acquire a shared lock on a read-write lock
pthread_rwlock_trywrlock()
Attempt to acquire an exclusive lock on a read-write lock
pthread_rwlock_unlock()
Unlock a read-write lock
pthread_rwlock_wrlock()
Acquire an exclusive write lock on a read-write lock
pthread_rwlockattr_destroy()
Destroy a read-write lock attribute object
pthread_rwlockattr_getclock()
Get the clock attribute from a read-write lock attribute object
pthread_rwlockattr_getpshared()
Get the process-shared attribute of a read-write lock attribute object
pthread_rwlockattr_init()
Create a read-write lock attribute object
pthread_rwlockattr_setclock()
Set the clock attribute of a read-write lock attribute object
pthread_rwlockattr_setpshared()
Set the process-shared attribute of a read-write lock attribute object
pthread_self()
Get the calling thread's ID
pthread_setcancelstate()
Set a thread's cancellation state
pthread_setcanceltype()
Set a thread's cancellation type
pthread_setconcurrency()
Set the concurrency level for a thread
pthread_setname_np()
Name a thread
pthread_setschedparam()
Set thread scheduling parameters
pthread_setschedprio()
Set a thread's priority
pthread_setspecific()
Set a thread-specific data value
pthread_sigmask()
Modify or examine a thread's signal-blocked mask
pthread_sleepon_broadcast()
Unblock waiting threads
pthread_sleepon_lock()
Lock the pthread_sleepon* functions
pthread_sleepon_signal()
Signal a sleeping thread
pthread_sleepon_timedwait()
Make a thread sleep while waiting
pthread_sleepon_unlock()
Unlock the pthread_sleepon*() functions
pthread_sleepon_wait()
Make a thread sleep while waiting
pthread_spin_destroy()
Destroy a thread spinlock
pthread_spin_init()
Initialize a thread spinlock
pthread_spin_lock()
Lock a thread spinlock
pthread_spin_trylock()
Try to lock a thread spinlock
pthread_spin_unlock()
Unlock a thread spinlock
pthread_testcancel()
Test thread cancellation
pthread_timedjoin(), pthread_timedjoin_monotonic()
Join a thread, with a time limit
ptsname()
Get the name of a slave pseudo-terminal device
ptsname_r()
Get the name of a slave pseudo-terminal device
_pulse
Structure that describes a pulse
pulse_attach()
Attach a handler function to a pulse code
pulse_detach()
Detach a handler function from a pulse code
putc()
Write a character to a stream
putc_unlocked()
Write a character to an output stream
putchar()
Write a character to standard output
putchar_unlocked()
Write a character to stdout
putenv()
Add, change or delete an environment variable
puts()
Write a string to stdout
putspent()
Put an entry into the shadow password database
pututline()
Write an entry in the user-information file
putw()
Put a word on a stream
putwc()
Write a wide character to a stream
putwchar()
Write a wide character to a stdout
pwrite(), pwrite64()
Write into a file without changing the file pointer