Manual section 3C

_longjmp - non-local goto
_setjmp - non-local goto
_tolower - convert lower case characters to upper case
_toupper - convert upper case characters to lower case
a64l, l64a, l64a_r - convert between long integer and base-64 ASCII string
abort - generate an abnormal termination signal
abs, labs - return integer absolute value
aclsort - sort an Access Control List
addsev - define additional severities
addseverity - build a list of severity levels for an application for use with fmtmsg
altzone - date and time constant
asctime - convert date and time to string
asctime_r - convert date and time to string
atexit - add program termination routine
atof - convert string to double-precision number
atoi - convert ASCII to integer in base 10
atol - convert ASCII to long integer in base 10
atoll - convert ASCII to long long integer in base 10
bcmp - bit and byte string operations
bcopy - bit and byte string operations
bsd_signal - simplified signal facilities
bsearch - binary search a sorted table
bstring: bcopy, bcmp, bzero - bit and byte string operations
bzero - bit and byte string operations
calloc - checking memory allocator
catclose - close a message catalogue
catgets - read a program message
catopen, catclose - open/close a message catalog
cfgetispeed - general terminal interface
cfgetospeed - general terminal interface
cfsetispeed - general terminal interface
cfsetospeed - general terminal interface
clock - report CPU time used
closedir - close named directory stream
confstr - obtain configurable string values
conv: toupper, tolower, _toupper, _tolower, toascii - translate characters
ctime - convert date and time to string
ctime, ctime_r, localtime, localtime_r, gmtime, gmtime_r, asctime, asctime_r, tzset, timezone, altzone, daylight, tzname - convert date and time to string
ctime_r - convert date and time to string
ctype - character handling
daylight - date and time constant
dbm_clearerr - clear the error condition of a database
dbm_close - close a database
dbm_delete - delete a record and its key from a database
dbm_error - return the error condition of a database
dbm_fetch - write a record to a database
dbm_firstkey - return the first key in a database
dbm_nextkey - return the next key in a database
dbm_open - open a database
dbm_store - add a record to a database
difftime - compute the difference between two calendar times
directory: opendir, readdir, readdir64, readdir_r, readdir64_r, telldir, seekdir, rewinddir, closedir - directory operations
div, ldiv, lldiv - compute the quotient and remainder
dladdr - translate address to symbolic information
dlclose - close a shared object
dlerror - get diagnostic information
dlopen - open a shared object
dlsym - get the address of a symbol in shared object
drand48, erand48, lrand48, nrand48, mrand48, jrand48, srand48, seed48, lcong48 - generate uniformly distributed pseudo-random numbers
dup2 - duplicate an open file descriptor
ecvt - convert floating-point number to string
ecvt, ecvtl, fcvt, fcvtl, gcvt, gcvtl - convert floating-point number to string
ecvtl - convert floating-point number to string
edata - first address above initialized data region
end, etext, edata - last locations in program
endgrent - close the group file
endpwent - close password file
endspent - close the shadow password file
erand48 - generate uniformly distributed pseudo-random numbers
etext - first address above program text
fattach - attach STREAMS-based file descriptor to file system object
fcvt - convert floating-point number to string
fcvtl - convert floating-point number to string
FD_CLR - remove from descriptor set
FD_ISSET - query descriptor set
FD_SET - add to descriptor set
FD_ZERO - initialize a null descriptor set
fdetach - detach a name from a STREAMS-based file descriptor
ffs - find first set bit
fgetgrent - return pointer to next group structure in stream
fgetgrent_r - fill in group structure from next in stream
fgetpos - stores current value of file position indicator for a stream
fgetpos64 - stores current value of file position indicator for a stream (supports large files)
fgetpwent - return pointer to next password structure in stream
fgetpwent_r - fill in password structure from next in stream
fgetspent - return pointer to shadow password entry from next in stream
fgetspent_r - fill in shadow password entry from next in stream
fgetws - get a wchar_t string from a stream
fmtmsg - display a message on stderr or system console
fnmatch, _fnmcomp, _fnmexec, _fnmfree - match filename against pattern
fpgetround, fpsetround, fpgetmask, fpsetmask, fpgetsticky, fpsetsticky - IEEE floating-point environment control
free - checking memory allocator
frexp - manipulate floating-point numbers
frexp, frexpf, frexpl, ilogb, ilogbf, ilogbl, ldexp, ldexpf, ldexpl, logb, logbf, logbl, modf, modff, modfl, nextafter, nextafterf, nextafterl, scalb, scalbf, scalbl - manipulate parts of floating-point numbers
frexpf - manipulate floating-point numbers
frexpl - manipulate floating-point numbers
fsetpos - set position of next input/output operation on a stream
fsetpos, fsetpos64, fgetpos, fgetpos64 - reposition a file pointer in a stream
fsetpos64 - set position of next input/output operation on a stream (supports large files)
ftime - get date and time
ftok - standard interprocess communication package
ftw - walk a file tree
ftw, ftw64, nftw, nftw64 - walk a file tree
ftw64 - walk a file tree (supports large files)
gcvt - convert floating-point number to string
gcvtl - convert floating-point number to string
getcwd - get pathname of current working directory
getdate - convert user format date and time
getdtablesize - get file descriptor table size
getenv - return value for environment name
getgrent - return pointer to group entry
getgrent, getgrent_r, getgrgid, getgrgid_r, getgrnam, getgrnam_r, setgrent, endgrent, fgetgrent, fgetgrent_r - manipulate group file entry
getgrent_r - fill in group structure from next entry
getgrgid - return pointer to group entry matching gid
getgrgid_r - fill in group entry matching gid
getgrnam - return pointer to group entry matching name
getgrnam_r - fill in group entry matching name
gethostid - get an identifier for the current host
gethostname - get name of current host
gethostname, sethostname - get or set name of current host
getitimer - get value of interval timer
getlogin, getlogin_r - get login name
getopt: getopt, optarg, optind, opterr, optopt - get option letter from argument vector
getpagesize - get system page size
getpass - read a password
getpass_r - read a password
getpriority - get program scheduling priority
getpriority, setpriority - get or set program scheduling priority
getpwent - return pointer to password entry
getpwent, getpwent_r, getpwuid, getpwuid_r, getpwnam, getpwnam_r, setpwent, endpwent, fgetpwent, fgetpwent_r - manipulate password file
getpwent_r - fill in password structure from next entry
getpwnam - return pointer to password entry matching login name
getpwnam_r - fill in password entry matching login name
getpwuid - return pointer to password entry matching uid
getpwuid_r - fill in password entry matching uid
getrusage - get information about resource utilization
getspent - return pointer to next shadow password entry
getspent, getspent_r, getspnam, getspnam_r, setspent, endspent, fgetspent, fgetspent_r - manipulate shadow password file
getspent_r - fill in spwd structure from next shadow password entry
getspnam - return pointer to shadow password file entry matching name
getspnam_r - fill in shadow password file entry matching name
getsubopt - parse suboptions from a string
gettxt - retrieve a text string
getwd - get current working directory pathname
getwidth - get information on supplementary code sets
glob, globfree - generate pathnames matching a pattern
gmtime - convert date and time to string
gmtime_r - convert date and time to string
grantpt - grant access to the slave pseudo-terminal device
hcreate - manage hash search tables
hdestroy - manage hash search tables
hsearch, hcreate, hdestroy - manage hash search tables
iconv - codeset conversion function
iconv_close - code conversion deallocation function
iconv_open - code conversion allocation function.
ilogb - manipulate floating-point numbers
ilogbf - manipulate floating-point numbers
ilogbl - manipulate floating-point numbers
index - string operations
initgroups - initialize the supplementary group access list
initstate - initialize a state array
insque, remque - insert/remove element from a queue
Intro - introduction to libc library
isalnum - test for alphanumeric character
isalpha - test for alphabetic character
isascii - test for ASCII character
isastream - test a file descriptor
isatty - determine if a file descriptor is a terminal device
isblank - test for blank character
iscntrl - test for control character
isdigit - test for digit character
isgraph - test for printable character except space
islower - test for lowercase character
isnan, isnand, isnanf, finite, fpclass, unordered - determine type of floating-point number
isprint - test for printable character
ispunct - test for punctuation character
isspace - test for space character
isupper - test for uppercase character
iswalnum - test wide characters for alpha or digit class
iswalpha - test wide characters for alpha class
iswcntrl - test wide characters for cntrl class
iswctype, wctype - test wide characters for a particular class.
iswdigit - test wide characters for digit class
iswgraph - test wide characters for graph class
iswlower - test wide characters for lower class
iswprint - test wide characters for print class
iswpunct - test wide characters for punct class
iswspace - test wide characters for space class
iswupper - test wide characters for upper class
iswxdigit - test wide characters for xdigit class
isxdigit - test for hexadecimal digit character
jrand48 - generate uniformly distributed pseudo-random numbers
killpg - send signal to a process group
l3tol, ltol3 - convert between 3-byte integers and long integers
l64a - convert between long integer and base-64 ASCII string
l64a_r - convert between long integer and base-64 ASCII string
labs - return integer absolute value
lckpwdf - lock password file
lcong48 - generate uniformly distributed pseudo-random numbers
ldexp - manipulate floating-point numbers
ldexpf - manipulate floating-point numbers
ldexpl - manipulate floating-point numbers
ldiv - compute the quotient and remainder
lfind - linear search and update
lfmt, vlfmt - display error message in standard format and pass to logging and monitoring services
llabs - return integer absolute value
lldiv - compute the quotient and remainder
localeconv - get numeric formatting information
localtime - convert date and time to string
localtime_r - convert date and time to string
lockf - record locking on files
lockf, lockf64 - record locking on files
lockf64 - record locking on files (supports large files)
logb - manipulate floating-point numbers
logbf - manipulate floating-point numbers
logbl - manipulate floating-point numbers
longjmp - non-local goto
lrand48 - generate uniformly distributed pseudo-random numbers
lsearch, lfind - linear search and update
makecontext - modify user context
makedev, major, minor - manage a device number
mallinfo - checking memory allocator
malloc, calloc, free, realloc, memalign, valloc, mallinfo - checking memory allocator
mbchar: mbtowc, wctomb, mblen, mbrtowc, wcrtomb, mbrlen - multibyte character handling
mblen - multibyte character handling
mbrlen - multibyte character handling
mbrtowc - multibyte character handling
mbsinit - test for initial multibyte conversion state
mbsrtowcs - multibyte string functions
mbstowcs - multibyte string functions
mbstring: mbstowcs, wcstombs, mbsrtowcs, wcsrtombs - multibyte string functions
mbtowc - multibyte character handling
memalign - checking memory allocator
memccpy - memory operations
memchr - memory operations
memcmp - memory operations
memcpy - memory operations
memmove - memory operations
memory: memccpy, memchr, memcmp, memcpy, memmove, memset - memory operations
memset - memory operations
mkfifo - create a new FIFO
mkstemp - make a unique file name
mktemp - make a unique file name
mktime - converts a tm structure to a calendar time
mlock - lock pages in memory
mlockall - lock address space
modf - manipulate floating-point numbers
modff - manipulate floating-point numbers
modfl - manipulate floating-point numbers
monitor - prepare execution profile
mrand48 - generate uniformly distributed pseudo-random numbers
msync - synchronize memory with physical storage
munlock - unlock pages in memory
munlockall - unlock address space
nap - suspend execution for a short interval
ndbm: dbm_clearerr, dbm_close, dbm_delete, dbm_error, dbm_fetch, dbm_firstkey, dbm_nextkey, dbm_open, dbm_store - database subroutines
nextafter - manipulate floating-point numbers
nextafterf - manipulate floating-point numbers
nextafterl - manipulate floating-point numbers
nftw - walk a file tree, takes defining flags
nftw64 - walk a file tree, takes defining flags (supports large files)
nl_langinfo - language information
nrand48 - generate uniformly distributed pseudo-random numbers
nsdispatch - nsdispatch
offsetof - offset of structure member
opendir - open a directory
optarg - pointer to start of option argument
opterr - disable getopt error message
optind - index of the next option argument
optopt - value of character that caused getopt error
perror - print system error messages
pfmt, vpfmt - display error message in standard format
procprivl - add, remove, count, or put privileges associated with the calling process
ptsname - get name of the slave pseudo-terminal device
putenv - change or add value to environment
putpwent - write password file entry
putspent - write shadow password file entry
putws - put a wchar_t string on a stream
qsort - quicker sort
raise - send signal to program
rand - simple random-number generator
rand, rand_r, srand - simple random-number generator
rand_r - simple random-number generator
random - return psuedo-random number
random: initstate, random, setstate, srandom - pseudorandom number functions
rbt_delete - balanced binary tree operations
rbt_find - balanced binary tree operations
rbt_free - balanced binary tree operations
rbt_init - balanced binary tree operations
rbt_insert - balanced binary tree operations
rbt_walk - balanced binary tree operations
rbtree: rbt_delete, rbt_find, rbt_free, rbt_init, rbt_insert, rbt_walk - manage balanced binary tree
re_comp - compile regular expression
re_comp, re_exec - regular expression handler
re_exec - compare regular expressions
readdir - return pointer to next open directory
readdir64 - return pointer to next open directory (supports large files)
readdir64_r - return pointer to next open directory (supports large files)
readdir_r - return pointer to next open directory
realloc - checking memory allocator
realpath - returns the real file name
regcmp - compile regular expression
regcmp, regex - regular expression handler
regcomp, regexec, regerror, regfree - regular expression matching
regex - compare regular expressions
remove - remove file
remque - remove element from a queue
rewinddir - reset position of named directory stream
rindex - string operations
scalb - manipulate floating-point numbers
scalbf - manipulate floating-point numbers
scalbl - manipulate floating-point numbers
seed48 - generate uniformly distributed pseudo-random numbers
seekdir - set position of next read on directory stream
select, FD_CLR, FD_ISSET, FD_SET, FD_ZERO - synchronous I/O multiplexing
setcat - define default catalog
setgrent - rewind the group file
sethostname - set name of current host
setitimer - set value of interval timer
setjmp - non-local goto
setlabel - define the label for pfmt
setlocale - modify and query a program's locale
setpriority - set program scheduling priority
setpwent - rewind password file for further searches
setregid - set real and effective group IDs
setreuid - set real and effective user IDs
setspent - rewind shadow password file for repeated searches
setstate - switch between state arrays
sigaddset - add to signal set
sigdelset - delete from signal set
sigemptyset - initialize empty signal set
sigfillset - initialize signal set to all signals
siginterrupt - allow signals to interrupt system calls
sigismember - query signal set
siglongjmp - a non-local goto with signal state
sigsetjmp - a non-local goto with signal state
sigsetops: sigemptyset, sigfillset, sigaddset, sigdelset, sigismember - manipulate sets of signals
sleep - suspend execution for interval
srand - simple random-number generator
srand48 - generate uniformly distributed pseudo-random numbers
srandom - initialize the current state array
stdipc: ftok - standard interprocess communication package
strcasecmp - string operations
strcasecmp, strncasecmp - case-insensitive string comparisons
strcat - append copy of one string to another
strchr - return pointer to first (last) occurrence of c
strcmp - compare one string to another
strcoll - string collation
strcpy - copy one string to another
strcspn - return length of initial segment of string1 of characters from (not from) string2
strdup - return pointer to new duplicate string
strerror - get error message string
strfmon - convert monetary value to string
strftime, cftime, ascftime - convert date and time to string
string - string operations
strlen - return number of characters in string
strncasecmp - string operations
strncat - append n characters of one string to another
strncmp - compare n characters of one string to another
strncpy - copy n characters of one string to another
strpbrk - return pointer to first occurrence in string1 of any character in string2
strptime - date and time conversion
strrchr - return pointer to first (last) occurrence of c
strspn - return length of initial segment of string1 of characters from (not from) string2
strstr - locate first occurrence in string1 of sequence from string2
strtod, strtold, atof - convert string to double-precision number
strtok - return pointer of string token
strtok_r - return pointer of string token
strtol, strtoll, strtoul, strtoull, atol, atoll, atoi - convert string to integer
strtold - convert string to double-precision number
strtoll - convert string to long long integer
strtoul - convert string to unsigned long integer
strtoull - convert string to unsigned long long integer
strxfrm - string transformation
swab - swap bytes
swapcontext - saves and resets current context
sysconf - get configurable system variables
tcdrain - general terminal interface
tcflow - general terminal interface
tcflush - general terminal interface
tcgetattr - general terminal interface
tcgetpgrp - general terminal interface
tcgetsid - general terminal interface
tcgetspeed, tcsetspeed - get and set baud rate
tcsendbreak - general terminal interface
tcsetattr - general terminal interface
tcsetpgrp - set terminal foreground process group ID
tcsetspeed - get and set baud rate
tdelete - manage binary search trees
telldir - return current location of named directory stream
termios: tcgetattr, tcsetattr, tcsendbreak, tcdrain, tcflush, tcflow, cfgetospeed, cfgetispeed, cfsetispeed, cfsetospeed, tcgetpgrp, tcsetpgrp, tcgetsid - general terminal interface
tfind - manage binary search trees
timezone - date and time constant
toascii - convert characters to 7-bit ASCII
tolower - convert lower case characters to upper case
toupper - convert upper case characters to lower case
towlower - translate characters
towupper - translate characters
tsearch, tfind, tdelete, twalk - manage binary search trees
ttyname - find name of a terminal
ttyname, ttyname_r, isatty - find name of a terminal
ttyname_r - find name of a terminal
ttyslot - find the slot in the utmp file of the current user
twalk - manage binary search trees
tzname - date and time constant
tzset - convert date and time to string
ualarm - set the interval timer
ulckpwdf - unlock password file
unlockpt - unlock a pseudo-terminal master/slave pair
usleep - suspend process for interval in microseconds
utimes - set file access and modification times
valloc - checking memory allocator
wait3 - wait for child process to change state
wconv: towupper, towlower - translate characters
wcrtomb - multibyte character handling
wcscat - concatenate two wide character strings
wcschr - scan a wide character string
wcscmp - compare two wide character strings
wcscoll - wide character string comparison using collating information
wcscpy - copy a wide character string
wcscspn - get length of complementary wide substring
wcsftime - convert date and time to wide character string
wcslen - obtain wide character string length
wcsncat - concatenate two wide character strings with bound
wcsncmp - compare two wide character strings with bound
wcsncpy - copy a wide character string with bound
wcspbrk - scan a wide character string for wide characters
wcsrchr - reverse wide character string scan
wcsrtombs - multibyte string functions
wcsspn - obtain the length of a wide substring
wcsstr, wcswcs - find wide substring
wcstod, wcstof, wcstold - convert wide string to floating point value
wcstok - split a wide character string into tokens
wcstol - convert a wide character string to a long integer
wcstoll - convert a wide character string to a long long integer
wcstombs - multibyte string functions
wcstoul - convert a wide character string to an unsigned long integer
wcstoull - convert a wide character string to an unsigned long long integer
wcswcs - find wide substring
wcswidth - determine the number of column positions for a wide character string
wcsxfrm - wide character string transformation
wctob - wide character to byte conversion
wctomb - multibyte character handling
wctype: iswalpha, iswupper, iswlower, iswdigit, iswxdigit, iswalnum, iswgraph, iswspace, iswpunct, iswprint, iswcntrl - test wide characters for a specified class
wcwidth - determine the number of column positions for a wide character
wordexp, wordfree - perform word expansions