Man Pages in HTML Format: man3

__setfpucw - set fpu control word on i386 architecture (obsolete)

a64l - convert between long and base-64

abort - cause abnormal program termination

abs - compute the absolute value of an integer.

acos - arc cosine function

acosh - inverse hyperbolic cosine function

alloca - memory allocator

argz_add - functions to handle an argz list

asin - arc sine function

asinh - inverse hyperbolic sine function

asprintf - print to allocated string

assert - abort the program if assertion is false

assert_perror - test errnum and abort

atan - arc tangent function

atan2 - arc tangent function of two variables

atanh - inverse hyperbolic tangent function

atexit - register a function to be called at normal program termination.

atof - convert a string to a double.

atoi - convert a string to an integer.

basename - Parse pathname components

bcmp - compare byte sequences

bcopy - copy byte sequence

bindresvport - bind a socket to a privileged IP port

bsearch - binary search of a sorted array.

bstring - byte string operations

btowc - convert single byte to wide character

btree - btree database access method

byteorder - convert values between host and networkbyte order

bzero - write zero bytes

catgets - get message from a message catalog

catopen - open/close a message catalog

cbrt - cube root function

ceil - ceiling function: smallest integral value not less than argument

clearenv - clear the environment

clock - Determine processor time

closedir - close a directory

cmsg - Access ancillary data.

confstr - get configuration dependent string variables

copysign - copy sign of a number

cos - cosine function

cosh - hyperbolic cosine function

crypt - password and data encryption

ctermid - get controlling terminal name

ctime - transform date and timeto broken-down time or ASCII

daemon - run in the background

dbopen - database access methods

difftime - calculate time difference

dirfd - get directory stream file descriptor

div - computes the quotient and remainder of integer division

dlopen - Programming interface to dynamic linking loader.

dprintf - print to a file descriptor

drand48 - generate uniformly distributed pseudo-random numbers

drem - floating-point remainder function

dysize - get number of days for a given year

ecvt - convert a floating-point number to a string.

ecvt_r - convert a floating-point number to a string

encrypt - Encrypt 64 bits messages

envz_add - environment string support

erf - error function and complementary error function

err - formatted error messages

errno - number of last error

ether_aton - Ethernet address manipulation routines

exec - execute a file

exit - cause normal program termination

exp - exponential, logarithmic and power functions

expm1 - exponential minus 1, logarithm of 1 plus argument

fabs - absolute value of floating-point number

fclose - close a stream

fcloseall - close all open streams

fenv - C99 floating point rounding and exception handling

ferror - check and reset stream status

fflush - flush a stream

ffs - find first bit set in a word

fgetgrent - get group file entry

fgetpwent - get password file entry

fgetwc - read a wide character from a FILE stream

fgetws - read a wide character string from a FILE stream

flockfile - lock FILE for stdio

floor - largest integral value not greater than argument

fmod - floating-point remainder function

fnmatch - match filename or pathname

fopen - stream open functions

fpathconf - get configuration values for files

fpurge - purge a stream

fputwc - write a wide character to a FILE stream

fputws - write a wide character string to a FILE stream

fread - binary stream input/output

frexp - convert floating-point number to fractional and integralcomponents

fseek - reposition a stream

fseeko - seek to or report file position

ftime - return date and time

ftok - convert a pathname and a project identifier to a System V IPC key

fts - traverse a file hierarchy

ftw - file tree walk

fwide - set and determine the orientation of a FILE stream

gamma - logarithm of the gamma function

gcvt - convert a floating-point number to a string.

getaddrinfo - network address and service translation

getcwd - Get current working directory

getdate - convert a string to struct tm

getdirentries - get directory entries in a filesystem independent format

getenv - get an environment variable

getfsent - handle fstab entries

getgrent - get group file entry

getgrnam - get group file entry

gethostbyname - getnetwork host entry

getipnodebyname - get network host names and addresses

getline - delimited string input

getloadavg - get system load averages

getlogin - get user name

getmntent - get file systemdescriptor file entry

getnameinfo - address-to-name translation in protocol-independent manner

getopt - Parse command line options

getpass - get a password

getprotoent - get protocol entry

getpt - open the pseudo-terminal master (PTM).

getpw - Re-construct password line entry

getpwent - get password file entry

getpwnam - get password file entry

getrpcent - get RPC entry

getrpcport - get RPC port number

gets - input of characters and strings

getttyent - get ttys file entry

getumask - get file creation mask

getusershell - get legal user shells

getutent - access utmp file entries

getw - input and output of words (ints)

getwchar - read a wide character from standard input

glob - find pathnames matching a pattern, free memory from glob()

grantpt - grant access to the slave pseudotty

gsignal - software signal facility

hash - hash database access method

hsearch - hash table management

hypot - Euclidean distance function

iconv - perform character set conversion

iconv_close - deallocate descriptor for character set conversion

iconv_open - allocate descriptor for character set conversion

inet - Internet address manipulation routines

inet_ntop - Parse network address structures

inet_pton - Create a network address structure

infnan - deal with infinite or not-a-number (NaN) result

initgroups - initialize the supplementary group access list

insque - insert/remove an item from a queue

intro - Introduction to library functions

isalpha - character classification routines

isatty - does this descriptor refer to a terminal

isinf - test for infinity or not-a-number (NaN)

iswalnum - test for alphanumeric wide character

iswalpha - test for alphabetic wide character

iswblank - test for whitespace wide character

iswcntrl - test for control wide character

iswctype - wide character classification

iswdigit - test for decimal digit wide character

iswgraph - test for graphic wide character

iswlower - test for lowercase wide character

iswprint - test for printing wide character

iswpunct - test for punctuation or symbolic wide character

iswspace - test for whitespace wide character

iswupper - test for uppercase wide character

iswxdigit - test for hexadecimal digit wide character

j0 - Bessel functions

key_setsecret - interfaces to rpc keyserver daemon

killpg - send signal to all members of a process group.

ldexp - multiply floating-point number by integral power of 2

ldiv - computes the quotient and remainder of long integer division.

lgamma - log gamma function

localeconv - get numeric formatting information

lockf - apply, test or remove a POSIX lock on an open file

longjmp - non-local jump to a saved stack context

lrint - round to nearest integer

lround - round to nearest integer, away from zero

lsearch - linear search of an array.

makecontext - manipulate user context

malloc - Allocate and free dynamic memory

malloc_hook - malloc debugging variables

MB_CUR_MAX - maximum length of a multibyte character in the current locale

MB_LEN_MAX - maximum multibyte length of a character across all locales

mblen - determine number of bytes in next multibyte character

mbrlen - determine number of bytes in next multibyte character

mbrtowc - convert a multibyte sequence to a wide character

mbsinit - test for initial shift state

mbsnrtowcs - convert a multibyte string to a wide character string

mbsrtowcs - convert a multibyte string to a wide character string

mbstowcs - convert a multibyte string to a wide character string

mbtowc - convert a multibyte sequence to a wide character

memccpy - copy memory area

memchr - scan memory for a character

memcmp - compare memory areas

memcpy - copy memory area

memfrob - frobnicate (encrypt) a memory area

memmem - locate a substring

memmove - copy memory area

memset - fill memory with a constant byte

mkdtemp - create a unique temporary directory

mkfifo - make a FIFO special file (a named pipe)

mkstemp - create a unique temporary file

mktemp - make a unique temporary file name

modf - extract signed integral and fractional values from floating-pointnumber

mpool - shared memory buffer pool

mtrace - malloc debugging

nan - return 'Not a Number'

netlink - Netlink macros

nextafter - floating point number manipulation

nl_langinfo - query language and locale information

on_exit - register a function to be called at normal program termination.

opendir - open a directory

openpty - tty utility functions

perror - print a system error message

popen - process I/O

posix_memalign - Allocate aligned memory

printf - formatted output conversion

profil - execution time profile

psignal - print signal message

ptsname - get the name of the slave pseudotty

putenv - change or add an environment variable

putpwent - write a password file entry

puts - output of characters and strings

putwchar - write a wide character to standard output

qecvt - convert a floating-point number to a string.

qsort - sorts an array

queue - implementations of lists, tail queues, and circular queues

raise - send a signal to the current process

rand - random number generator.

random - random number generator.

rcmd - routines for returning a stream to a remote command

re_comp - BSD regex functions

readdir - read a directory

realpath - return the canonicalized absolute pathname

recno - record number database access method

regex - POSIX regex functions

remove - delete a name and possibly the file it refers to

resolver - resolver routines

rewinddir - reset directory stream

rint - round to nearest integer

round - round to nearest integer, away from zero

rpc - library routines for remote procedure calls

rtnetlink - Macros to manipuate rtnetlink messages

scandir - scan a directory for matching entries

scanf - input format conversion

seekdir - set the position of the next readdir() call in the directorystream.

setbuf - stream buffering operations

setenv - change or add an environment variable

setjmp - save stack context for non-local goto

setlocale - set the current locale.

setlogmask - set log priority mask

shm_open - Create/open or unlink POSIX shared memory objects

siginterrupt - allow signals to interrupt system calls

signbit - test sign of a real floating point number

sigsetops - POSIXsignal set operations.

sin - sine function

sinh - hyperbolic sine function

sleep - Sleep for the specified number of seconds

sqrt - square root function

stdarg - variable argument lists

stdin - standard I/O streams

stdio - standard input/output library functions

stdio_ext - interfaces to stdio FILE structure

stpcpy - copy a string returning a pointer to its end

stpncpy - copy a fixed-size string, returning a pointer to its end

strcasecmp - compare two strings ignoring case

strcat - concatenate two strings

strchr - locate character in string

strcmp - compare two strings

strcoll - compare two strings using the current locale

strcpy - copy a string

strdup - duplicate a string

strerror - return string describing error code

strfmon - convert monetary value to a string

strfry - randomize a string

strftime - format date and time

strlen - calculate the length of a string

strnlen - determine the length of a fixed-size string

strpbrk - search a string for any of a set of characters

strptime - convert a string representation of time to a time tm structure

strsep - extract token from string

strsignal - return string describing signal

strspn - search a string for a set of characters

strstr - locate a substring

strtod - convert ASCII string to floating point number

strtok - extract tokens from strings

strtol - convert a string to a long integer.

strtoul - convert a string to an unsigned long integer

strverscmp - compare two version strings

strxfrm - string transformation

swab - swap adjacent bytes

sysconf - Get configuration information at runtime

syslog - send messages to the system logger

system - execute a shell command

tan - tangent function

tanh - hyperbolic tangent function

tcgetpgrp - get and set terminal foreground process group

tcgetsid - get session ID

telldir - return current location in directory stream.

tempnam - create a name for a temporary file

termios - get and setterminal attributes, line control, get and set baud rate

tgamma - true gamma function

timegm - inverses for gmtime and localtime

tmpfile - create a temporary file

tmpnam - create a name for a temporary file

toascii - convert character to ASCII

toupper - convert letter to upper or lower case

towctrans - wide-character transliteration

towlower - convert a wide character to lowercase

towupper - convert a wide character to uppercase

trunc - round to interger, towards zero

tsearch - manage a binary tree

ttyname - return name of a terminal

ttyslot - find the slot of the current user's terminal in some file

tzset - initialize time conversion information

ulimit - get and set user limits

undocumented - undocumented library functions

ungetwc - push back a wide character onto a FILE stream

unlocked_stdio - non-locking stdio functions

unlockpt - unlock a pseudotty master/slave pair

updwtmp - append an entry to the wtmp file

usleep - suspend execution for microsecond intervals

wcpcpy - copy a wide character string, returning a pointer to its end

wcpncpy - copy a fixed-size string of wide characters, returning a pointer to its end

wcrtomb - convert a wide character to a multibyte sequence

wcscasecmp - compare two wide-character strings, ignoring case

wcscat - concatenate two wide-character strings

wcschr - search a wide character in a wide-character string

wcscmp - compare two wide-character strings

wcscpy - copy a wide character string

wcscspn - search a wide-character string for any of a set of wide characters

wcsdup - duplicate a wide-character string

wcslen - determine the length of a wide-character string

wcsncasecmp - compare two fixed-size wide-character strings, ignoring case

wcsncat - concatenate two wide-character strings

wcsncmp - compare two fixed-size wide-character strings

wcsncpy - copy a fixed-size string of wide characters

wcsnlen - determine the length of a fixed-size wide-character string

wcsnrtombs - convert a wide character string to a multibyte string

wcspbrk - search a wide-character string for any of a set of wide characters

wcsrchr - search a wide character in a wide-character string

wcsrtombs - convert a wide character string to a multibyte string

wcsspn - advance in a wide-character string, skipping any of a set of wide characters

wcsstr - locate a substring in a wide-character string

wcstok - split wide-character string into tokens

wcstombs - convert a wide character string to a multibyte string

wcswidth - determine columns needed for a fixed-size wide character string

wctob - try to represent a wide character as a single byte

wctomb - convert a wide character to a multibyte sequence

wctrans - wide character translation mapping

wctype - wide character classification

wcwidth - determine columns needed for a wide character

wmemchr - search a wide character in a wide-character array

wmemcmp - compare two arrays of wide-characters

wmemcpy - copy an array of wide-characters

wmemmove - copy an array of wide-characters

wmemset - fill an array of wide-characters with a constant wide character

wprintf - formatted wide character output conversion

xdr - library routines for external data representation