POSIX::_exit	POSIX	terminate a process
POSIX::abort	POSIX	generate a fault
POSIX::abs	POSIX	integer absolute value
POSIX::access	POSIX	determine accessibility of file
POSIX::acos	POSIX	trigonometric functions
POSIX::alarm	POSIX	schedule signal after specified time
POSIX::asctime	POSIX	convert date and time
POSIX::asin	POSIX	trigonometric functions
POSIX::assert	POSIX	program verification
POSIX::atan2	POSIX	trigonometric functions
POSIX::atan	POSIX	trigonometric functions
POSIX::atof	POSIX	convert string to double-precision number
POSIX::atoi	POSIX	convert string to integer
POSIX::atol	POSIX	convert string to integer
POSIX::bsearch	POSIX	binary search a sorted table
POSIX::calloc	POSIX	memory allocator
POSIX::ceil	POSIX	round to integral value in floating-point or integer format
POSIX::chdir	POSIX	change current working directory
POSIX::chmod	POSIX	change mode of file
POSIX::chown	POSIX	change owner and group of a file
POSIX::clearerr	POSIX	stream status inquiries
POSIX::clock	POSIX	report CPU time used
POSIX::close	POSIX	delete a descriptor
POSIX::closedir	POSIX	directory operations
POSIX::cos	POSIX	trigonometric functions
POSIX::cosh	POSIX	hyperbolic functions
POSIX::creat	POSIX	create a new file
POSIX::ctermid	POSIX	generate filename for terminal
POSIX::ctime	POSIX	convert date and time
POSIX::cuserid	POSIX	get character login name of the user
POSIX::dup2	POSIX	duplicate a descriptor
POSIX::dup	POSIX	duplicate a descriptor
POSIX::errno	POSIX	system error messages
POSIX::execl	POSIX	execute a file
POSIX::execle	POSIX	execute a file
POSIX::execlp	POSIX	execute a file
POSIX::execv	POSIX	execute a file
POSIX::execve	POSIX	execute a file
POSIX::execvp	POSIX	execute a file
POSIX::exit	POSIX	terminate a process after performing cleanup
POSIX::exp	POSIX	exponential, logarithm, power
POSIX::fabs	POSIX	appendix and related miscellaneous functions for IEEE arithmetic
POSIX::fclose	POSIX	close or flush a stream
POSIX::fcntl	POSIX	file control
POSIX::fdopen	POSIX	open a stream
POSIX::feof	POSIX	stream status inquiries
POSIX::ferror	POSIX	stream status inquiries
POSIX::fflush	POSIX	close or flush a stream
POSIX::fgetc	POSIX	get character or integer from stream
POSIX::fgets	POSIX	get a string from a stream
POSIX::fileno	POSIX	stream status inquiries
POSIX::floor	POSIX	round to integral value in floating-point or integer format
POSIX::fmod	POSIX	appendix and related miscellaneous functions for IEEE arithmetic
POSIX::fopen	POSIX	open a stream
POSIX::fork	POSIX	create a new process
POSIX::fpathconf	POSIX	query file system related limits and options
POSIX::fprintf	POSIX	formatted output conversion
POSIX::fputc	POSIX	put character or word on a stream
POSIX::fputs	POSIX	put a string on a stream
POSIX::fread	POSIX	buffered binary input/output
POSIX::free	POSIX	memory allocator
POSIX::freopen	POSIX	open a stream
POSIX::frexp	POSIX	traditional UNIX functions
POSIX::fscanf	POSIX	formatted input conversion
POSIX::fseek	POSIX	reposition a stream
POSIX::fstat	POSIX	get file status
POSIX::ftell	POSIX	reposition a stream
POSIX::fwrite	POSIX	buffered binary input/output
POSIX::getc	POSIX	get character or integer from stream
POSIX::getchar	POSIX	get character or integer from stream
POSIX::getcwd	POSIX	get pathname of current working directory
POSIX::getegid	POSIX	get group identity
POSIX::getenv	POSIX	return value for environment name
POSIX::geteuid	POSIX	get user identity
POSIX::getgid	POSIX	get group identity
POSIX::getgrgid	POSIX	get group file entry
POSIX::getgrnam	POSIX	get group file entry
POSIX::getgroups	POSIX	get or set supplementary group IDs
POSIX::getlogin	POSIX	get login name
POSIX::getpgrp	POSIX	return or set the process group of a process
POSIX::getpid	POSIX	get process identification
POSIX::getppid	POSIX	get process identification
POSIX::getpwnam	POSIX	get password file entry
POSIX::getpwuid	POSIX	get password file entry
POSIX::gets	POSIX	get a string from a stream
POSIX::getuid	POSIX	get user identity
POSIX::gmtime	POSIX	convert date and time
POSIX::isalnum	POSIX	character classification and conversion macros and functions
POSIX::isalpha	POSIX	character classification and conversion macros and functions
POSIX::isatty	POSIX	find name of a terminal
POSIX::iscntrl	POSIX	character classification and conversion macros and functions
POSIX::isdigit	POSIX	character classification and conversion macros and functions
POSIX::isgraph	POSIX	character classification and conversion macros and functions
POSIX::islower	POSIX	character classification and conversion macros and functions
POSIX::isprint	POSIX	character classification and conversion macros and functions
POSIX::ispunct	POSIX	character classification and conversion macros and functions
POSIX::isspace	POSIX	character classification and conversion macros and functions
POSIX::isupper	POSIX	character classification and conversion macros and functions
POSIX::isxdigit	POSIX	character classification and conversion macros and functions
POSIX::kill	POSIX	send a signal to a process or a group of processes
POSIX::ldexp	POSIX	traditional UNIX functions
POSIX::link	POSIX	make a hard link to a file
POSIX::localeconv	POSIX	get numeric and monetary formatting conventions
POSIX::localtime	POSIX	convert date and time
POSIX::log10	POSIX	exponential, logarithm, power
POSIX::log	POSIX	exponential, logarithm, power
POSIX::longjmp	POSIX	non-local goto
POSIX::lseek	POSIX	move read/write pointer
POSIX::malloc	POSIX	memory allocator
POSIX::mblen	POSIX	multibyte character handling
POSIX::mbstowcs	POSIX	multibyte character handling
POSIX::mbtowc	POSIX	multibyte character handling
POSIX::memchr	POSIX	memory operations
POSIX::memcmp	POSIX	memory operations
POSIX::memcpy	POSIX	memory operations
POSIX::memset	POSIX	memory operations
POSIX::mkdir	POSIX	make a directory file
POSIX::mkfifo	POSIX	make a special file
POSIX::modf	POSIX	traditional UNIX functions
POSIX::nice	POSIX	change nice value of a process
POSIX::open	POSIX	open or create a file for reading or writing
POSIX::opendir	POSIX	directory operations
POSIX::pathconf	POSIX	query file system related limits and options
POSIX::pause	POSIX	stop until signal
POSIX::perror	POSIX	system error messages
POSIX::pipe	POSIX	create an interprocess communication channel
POSIX::pow	POSIX	exponential, logarithm, power
POSIX::pow	POSIX	multiple precision integer arithmetic
POSIX::printf	POSIX	formatted output conversion
POSIX::putc	POSIX	put character or word on a stream
POSIX::putchar	POSIX	put character or word on a stream
POSIX::puts	POSIX	put a string on a stream
POSIX::qsort	POSIX	quicker sort
POSIX::rand	POSIX	simple random number generator
POSIX::read	POSIX	read input
POSIX::readdir	POSIX	directory operations
POSIX::realloc	POSIX	memory allocator
POSIX::rename	POSIX	change the name of a file
POSIX::rewind	POSIX	reposition a stream
POSIX::rewinddir	POSIX	directory operations
POSIX::rmdir	POSIX	remove a directory file
POSIX::scanf	POSIX	formatted input conversion
POSIX::setbuf	POSIX	assign buffering to a stream
POSIX::setgid	POSIX	set user and group ID
POSIX::setjmp	POSIX	non-local goto
POSIX::setlocale	POSIX	set international environment
POSIX::setpgid	POSIX	set process group ID for job control
POSIX::setsid	POSIX	create session and set process group ID
POSIX::setuid	POSIX	set user and group ID
POSIX::setvbuf	POSIX	assign buffering to a stream
POSIX::sigaction	POSIX	examine and change signal action 
POSIX::siglongjmp	POSIX	non-local goto
POSIX::sigpending	POSIX	examine pending signals
POSIX::sigprocmask	POSIX	examine and change blocked signals
POSIX::sigsetjmp	POSIX	non-local goto
POSIX::sigsuspend	POSIX	automatically release blocked signals and wait for interrupt
POSIX::sin	POSIX	trigonometric functions
POSIX::sinh	POSIX	hyperbolic functions
POSIX::sleep	POSIX	suspend execution for interval
POSIX::sprintf	POSIX	formatted output conversion
POSIX::sqrt	POSIX	cube root, square root
POSIX::srand	POSIX	simple random number generator
POSIX::sscanf	POSIX	formatted input conversion
POSIX::stat	POSIX	get file status
POSIX::strcat	POSIX	string operations
POSIX::strchr	POSIX	string operations
POSIX::strcmp	POSIX	string operations
POSIX::strcoll	POSIX	compare or transform strings using collating information
POSIX::strcpy	POSIX	string operations
POSIX::strcspn	POSIX	string operations
POSIX::strftime	POSIX	convert date and time
POSIX::strlen	POSIX	string operations
POSIX::strncat	POSIX	string operations
POSIX::strncmp	POSIX	string operations
POSIX::strncpy	POSIX	string operations
POSIX::strpbrk	POSIX	string operations
POSIX::strrchr	POSIX	string operations
POSIX::strspn	POSIX	string operations
POSIX::strstr	POSIX	string operations
POSIX::strtod	POSIX	convert string to double-precision number
POSIX::strtok	POSIX	string operations
POSIX::strtol	POSIX	convert string to integer
POSIX::strxfrm	POSIX	compare or transform strings using collating information
POSIX::sysconf	POSIX	query system related limits, values, options
POSIX::system	POSIX	issue a shell command
POSIX::tan	POSIX	trigonometric functions
POSIX::tanh	POSIX	hyperbolic functions
POSIX::tcdrain	POSIX	get and set terminal attributes, line control, get and set baud rate, get and set terminal foreground process group ID
POSIX::tcflow	POSIX	get and set terminal attributes, line control, get and set baud rate, get and set terminal foreground process group ID
POSIX::tcflush	POSIX	get and set terminal attributes, line control, get and set baud rate, get and set terminal foreground process group ID
POSIX::tcgetpgrp	POSIX	get, set foreground process group ID
POSIX::tcsendbreak	POSIX	get and set terminal attributes, line control, get and set baud rate, get and set terminal foreground process group ID
POSIX::tcsetpgrp	POSIX	get, set foreground process group ID
POSIX::tell	POSIX	move read/write pointer
POSIX::time	POSIX	get date and time
POSIX::times	POSIX	get process times
POSIX::tmpfile	POSIX	create a temporary file
POSIX::tmpnam	POSIX	create a name for a temporary file
POSIX::tolower	POSIX	character classification and conversion macros and functions
POSIX::toupper	POSIX	character classification and conversion macros and functions
POSIX::ttyname	POSIX	find name of a terminal
POSIX::tzset	POSIX	convert date and time
POSIX::umask	POSIX	set file creation mode mask
POSIX::uname	POSIX	get information about current system
POSIX::ungetc	POSIX	push character back into input stream
POSIX::unlink	POSIX	remove directory entry
POSIX::utime	POSIX	set file times
POSIX::vfprintf	POSIX	print formatted output of a varargs argument list
POSIX::vprintf	POSIX	print formatted output of a varargs argument list
POSIX::vsprintf	POSIX	print formatted output of a varargs argument list
POSIX::wait	POSIX	wait for process to terminate or stop, examine returned status
POSIX::waitpid	POSIX	wait for process to terminate or stop, examine returned status
POSIX::wcstombs	POSIX	multibyte character handling
POSIX::wctomb	POSIX	multibyte character handling
POSIX::write	POSIX	write output