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P

• pack - compress files (LEGACY)
• pair_content, PAIR_NUMBER - get information on a colour pair
• paste - merge corresponding or subsequent lines of files
• patch - apply changes to files
• pathchk - check pathnames
• pathconf - get configurable pathname variables
• pause - suspend the thread until signal is received
• pax - portable archive interchange
• pcat - expand and concatenate files (LEGACY)
• pclose - close a pipe stream to or from a process
• pechochar, pecho_wchar - write a character and rendition and immediately
• perror - write error messages to standard error
• pg - file perusal filter for soft-copy terminals (LEGACY)
• pipe - create an interprocess channel
• pnoutrefresh, prefresh - refresh pads
• poll - input/output multiplexing
• poll.h - definitions for the poll() function
• popen - initiate pipe streams to or from a process
• pow - power function
• pr - print files
• pread - read from a file
• printf - print formatted output
• printf - write formatted output (XCU)
• printw - print formatted output in the current window
• prs - print an SCCS file (DEVELOPMENT)
• ps - report process status
• pthread.h - threads
• pthread_atfork - register fork handlers
• pthread_attr_getguardsize, pthread_attr_setguardsize -
• pthread_attr_init, pthread_attr_destroy
• pthread_attr_setdetachstate, pthread_attr_getdetachstate
• pthread_attr_setinheritsched, pthread_attr_getinheritsched
• pthread_attr_setschedparam, pthread_attr_getschedparam
• pthread_attr_setschedpolicy, pthread_attr_getschedpolicy
• pthread_attr_setscope, pthread_attr_getscope
• pthread_attr_setstackaddr, pthread_attr_getstackaddr
• pthread_attr_setstacksize, pthread_attr_getstacksize
• pthread_cancel - cancel execution of a thread
• pthread_cleanup_push, pthread_cleanup_pop - establish cancellation handlers
• pthread_cond_init, pthread_cond_destroy - initialise and destroy
• pthread_cond_signal, pthread_cond_broadcast - signal or broadcast a
• pthread_cond_wait, pthread_cond_timedwait - wait on a condition
• pthread_condattr_getpshared, pthread_condattr_setpshared
• pthread_condattr_init, pthread_condattr_destroy
• pthread_create - thread creation
• pthread_detach - detach a thread
• pthread_equal - compare thread IDs
• pthread_exit - thread termination
• pthread_getconcurrency, pthread_setconcurrency -
• pthread_getschedparam, pthread_setschedparam
• 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_mutex_init, pthread_mutex_destroy - initialise or destroy a mutex
• pthread_mutex_lock, pthread_mutex_trylock, pthread_mutex_unlock
• pthread_mutex_setprioceiling, pthread_mutex_getprioceiling
• pthread_mutexattr_getpshared, pthread_mutexattr_setpshared
• pthread_mutexattr_gettype, pthread_mutexattr_settype
• pthread_mutexattr_init, pthread_mutexattr_destroy
• pthread_mutexattr_setprioceiling, pthread_mutexattr_getprioceiling
• pthread_mutexattr_setprotocol, pthread_mutexattr_getprotocol
• pthread_once - dynamic package initialisation
• pthread_rwlock_init, pthread_rwlock_destroy
• pthread_rwlock_rdlock, pthread_rwlock_tryrdlock
• pthread_rwlock_unlock - unlock a read-write lock object
• pthread_rwlock_wrlock, pthread_rwlock_trywrlock
• pthread_rwlockattr_getpshared, pthread_rwlockattr_setpshared
• pthread_rwlockattr_init, pthread_rwlockattr_destroy
• pthread_self - get calling thread's ID
• pthread_setcancelstate, pthread_setcanceltype, pthread_testcancel
• pthread_setconcurrency - get or set level of concurrency
• pthread_setspecific, pthread_getspecific - thread-specific data management
• pthread_sigmask - examine and change blocked signals
• ptsname - get name of the slave pseudo-terminal device
• putc - put byte on a stream
• putc_unlocked - stdio with explicit client locking
• putchar - put byte on stdout stream
• putchar_unlocked - stdio with explicit client locking
• putenv - change or add a value to environment
• putmsg, putpmsg - send a message on a STREAM
• putp, tputs - output commands to the terminal
• puts - put a string on standard output
• pututxline - put an entry into user accounting database
• putw - put a word on a stream
• putwc - put a wide-character on a stream
• putwchar - put a wide-character on stdout stream
• putwin - dump window to a file
• pwd - return working directory name
• pwd.h - password structure
• pwrite - write on a file

• page
• page size
• parameter
• parent directory
• parent process
• parent process ID
• pathname
• pathname component
• pathname resolution
• path prefix
• pattern
• period
• permissions
• persistence
• pipe
• positional parameter
• POSIX Locale
• Portable Character Set
• portable filename character set
• preallocation
• preempted process (or thread)
• printable character
• printable file
• priority
• priority band
• priority-based scheduling
• privilege
• process
• process group
• process group ID
• process group leader
• process group lifetime
• process ID
• process lifetime
• process list
• process virtual time
• program
• pseudo-terminal