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abort(3)
cause abnormal program termination
abs(3)
integer absolute value function
acl_canonicalize_principal(3), acl_check(3), acl_exact_match(3), acl_add(3), acl_delete(3), acl_initialize(3)
access control list routines
acos(3)
arc cosine function
acosh(3)
inverse hyperbolic cosine function
alarm(3)
set signal timer alarm
alloca(3)
memory allocator
asctime(3), ctime(3), difftime(3), gmtime(3), localtime(3), mktime(3)
transform binary date and time value to ASCII
asin(3)
arc sine function
asinh(3)
inverse hyperbolic sine function
assert(3)
expression verification macro
atan(3)
arc tangent function of one variable
atan2(3)
arc tangent function of two variables
atanh(3)
inverse hyperbolic tangent function
atexit(3)
register a function to be called on exit
atof(3)
convert ASCII string to double
atoi(3)
convert ASCII string to integer
atol(3)
convert ASCII string to long integer
bcmp(3)
compare byte string
bcmp(3), bcopy(3), bzero(3), memccpy(3), memchr(3), memcmp(3), memcpy(3), memmove(3), memset(3)
byte string operations
bcopy(3)
copy byte string
bitstring(3), bit_alloc(3)
bit_clear, bit_decl, bit_ffs, bit_nclear, bit_nset, bit_set, bitstr_size, bit_test bit-string manipulation macros
bsearch(3)
binary search of a sorted table
btree(3)
btree database access method
byteorder(3), htonl(3), htons(3), ntohl(3), ntohs(3)
convert values between host and network byte order
bzero(3)
write zeroes to a byte string
calloc(3)
allocate clean memory (zero initialized space)
cbrt(3), sqrt(3)
cube root and square root functions
ceil(3)
smallest integral value not greater than x
cfgetispeed(3), cfsetispeed(3), cfgetospeed(3), cfsetospeed(3), cfsetspeed(3), cfmakeraw(3), tcgetattr(3), tcsetattr(3)
manipulating the termios structure
clearerr(3), feof(3), ferror(3), fileno(3)
check and reset stream status
clientlib(3)
NNTP clientlib part of InterNetNews library
clock(3)
determine processor time used
confstr(3)
get string-valued configurable variables
cos(3)
cosine function
cosh(3)
hyperbolic cosine function
crypt(3), setkey(3), encrypt(3), des_setkey(3), des_cipher(3)
DES encryption
ctermid(3)
generate terminal pathname
curses(3)
screen functions with ``optimal'' cursor motion
daemon(3)
run in the background
dbopen(3)
database access methods
des_crypt(3), ecb_crypt(3), cbc_crypt(3), des_setparity(3)
fast DES encryption
devname(3)
get device name
diff3(1)
3-way differential file comparison
directory(3), opendir(3), readdir(3), telldir(3), seekdir(3), rewinddir(3), closedir(3), dirfd(3)
directory operations
div(3)
return quotient and remainder from division
en(4)
Xerox 3 Mb/s Ethernet interface
end(3), etext(3), edata(3)
end boundaries of image segments
erf(3), erfc(3)
error function operators
err(3), verr(3), errx(3), verrx(3), warn(3), vwarn(3), warnx(3), vwarnx(3)
formatted error messages
exec(3), execl(3), execlp(3), execle(3), exect(3), execv(3), execvp(3)
execute a file
exit(3)
perform normal program termination
exp(3), expm1(3), log(3), log10(3), log1p(3), pow(3)
exponential, logarithm, power functions
fabs(3)
floating-point absolute value function
fclose(3)
close a stream
fflush(3), fpurge(3)
flush a stream
ffs(3)
find first bit set in a bit string
fgetc(3), getc(3), getchar(3), getw(3)
get next character or word from input stream
fgetln(3)
get a line from a stream
fgetpos(3), fseek(3), fsetpos(3), ftell(3), rewind(3)
reposition a stream
fgets(3), gets(3)
get a line from a stream
floor(3)
largest integral value not greater than x
fmod(3)
floating-point remainder function
fnmatch(3)
match filename or pathname
fopen(3), fdopen(3), freopen(3)
stream open functions
fputc(3), putc(3), putchar(3), putw(3)
output a character or word to a stream
fputs(3), puts(3)
output a line to a stream
fread(3), fwrite(3)
binary stream input/output
free(3)
free up memory allocated with malloc, calloc or realloc
frexp(3)
convert floating-point number to fractional and integral components
ftime(3)
get date and time
fts(3)
traverse a file hierarchy
funopen(3), fropen(3), fwopen(3)
open a stream
getbsize(3)
get user block size
getcap(3), cgetent(3), cgetset(3), cgetmatch(3), cgetcap(3), cgetnum(3), cgetstr(3), cgetustr(3), cgetfirst(3), cgetnext(3), cgetclose(3)
capability database access routines
getcwd(3)
get working directory pathname
getdiskbyname(3)
get generic disk description by its name
getenv(3), putenv(3), setenv(3), unsetenv(3)
environment variable functions
getfsent(3), getfsspec(3), getfsfile(3), setfsent(3), endfsent(3)
get file system descriptor file entry
getgrent(3), getgrnam(3), getgrgid(3), setgroupent(3)
setgrent, endgrent group database operations
getgrouplist(3)
calculate group access list
gethostbyname(3), gethostbyaddr(3), gethostent(3), sethostent(3), endhostent(3), herror(3)
get network host entry
gethostid(3), sethostid(3)
get/set unique identifier of current host
gethostname(3), sethostname(3)
get/set name of current host
getloadavg(3)
get system load averages
getmntinfo(3)
get information about mounted file systems
getmntopts(3)
scan mount options
getmode(3), setmode(3)
modify mode bits
getnetent(3), getnetbyaddr(3), getnetbyname(3), setnetent(3), endnetent(3)
get network entry
getnetgrent(3), innetgr(3), setnetgrent(3), endnetgrent(3)
netgroup database operations
getopt(3)
get option character from command line argument list
getpagesize(3)
get system page size
getpass(3)
get a password
getprotoent(3), getprotobynumber(3), getprotobyname(3), setprotoent(3), endprotoent(3)
get protocol entry
getpw(3)
get name from uid
getpwent(3), getpwnam(3), getpwuid(3), setpassent(3), setpwent(3), endpwent(3)
password database operations
getservent(3), getservbyport(3), getservbyname(3), setservent(3), endservent(3)
get service entry
getsubopt(3)
get sub options from an argument
getttyent(3), getttynam(3), setttyent(3), endttyent(3)
get ttys file entry
getusershell(3), setusershell(3), endusershell(3)
get legal user shells
getvfsbyname(3)
get information about a filesystem
glob(3), globfree(3)
generate pathnames matching a pattern
hash(3)
hash database access method
hypot(3), cabs(3)
euclidean distance and complex absolute value functions
ieee(3), copysign(3), drem(3), finite(3), logb(3), scalb(3)
IEEE 754 floating point support
index(3)
locate character in string
inet(3), inet_aton(3), inet_addr(3), inet_network(3), inet_ntoa(3), inet_makeaddr(3), inet_lnaof(3), inet_netof(3)
Internet address manipulation routines
infnan(3)
signals invalid floating-point operations on a VAX (temporary)
initgroups(3)
initialize group access list
inndcomm(3)
INND communication part of InterNetNews library
insque(3), remque(3)
insert/remove element from a queue
intro(3)
introduction to the C libraries
isalnum(3)
alphanumeric character test
isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3), isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3), toascii tolower(3), toupper(3)
character classification macros
isalpha(3)
alphabetic character test
isascii(3)
test for ASCII character
isblank(3)
space or tab character test
iscntrl(3)
control character test
isdigit(3)
decimal-digit character test
isgraph(3)
printing character test (space character exclusive)
isinf(3)
isnan test for infinity or not-a-number
islower(3)
lower-case character test
iso_addr(3), iso_ntoa(3)
elementary network address conversion routines for Open System Interconnection
isprint(3)
printing character test (space character inclusive)
ispunct(3)
punctuation character test
isspace(3)
white-space character test
isupper(3)
upper-case character test
isxdigit(3)
hexadecimal-digit character test
j0(3), j1(3), jn(3), y0(3), y1(3), yn(3)
bessel functions of first and second kind
krb(3), krb_mk_req(3), krb_rd_req(3), krb_kntoln(3), krb_set_key(3), krb_get_cred(3), krb_mk_priv(3), krb_rd_priv(3), krb_mk_safe(3), krb_rd_safe(3), krb_mk_err(3), krb_rd_err(3), krb_ck_repl(3)
Kerberos authentication library
krb_realmofhost(3), krb_get_phost(3), krb_get_krbhst(3), krb_get_admhst(3), krb_get_lrealm(3)
additional Kerberos utility routines
krb_sendauth(3), krb_recvauth(3), krb_net_write(3), krb_net_read(3)
Kerberos routines for sending authentication via network stream sockets
krb_set_tkt_string(3)
set Kerberos ticket cache file name
kuserok(3)
Kerberos version of ruserok
kvm(3)
kernel memory interface
kvm_geterr(3)
get error message on kvm descriptor
kvm_getfiles(3)
survey open files
kvm_getloadavg(3)
get error message on kvm descriptor
kvm_getprocs(3), kvm_getargv(3), kvm_getenvv(3)
access user process state
kvm_nlist(3)
retrieve symbol table names from a kernel image
kvm_open(3), kvm_openfiles(3), kvm_close(3)
initialize kernel virtual memory access
kvm_read(3), kvm_write(3)
read or write kernel virtual memory
labs(3)
return the absolute value of a long integer
ldexp(3)
multiply floating-point number by integral power of 2
ldiv(3)
return quotient and remainder from division
lgamma(3), lgamma gamma(3)
log gamma function, gamma function
libinn(3)
InterNetNews library routines
linkaddr(3), link_addr(3), link_ntoa(3)
elementary address specification routines for link level access
lsearch(3), lfind(3)
linear searching routines
malloc(3)
general memory allocation function
malloc(3), free(3), realloc(3), calloc(3), alloca(3)
general memory allocation operations
math(3)
introduction to mathematical library functions
mbrune(3), mbrrune(3), mbmb(3)
multibyte rune support for C
memccpy(3)
copy string until character found
memchr(3)
locate byte in byte string
memcmp(3)
compare byte string
memcpy(3)
copy byte string
memmove(3)
copy byte string
memset(3)
write a byte to byte string
mktemp(3)
make temporary file name (unique)
modf(3)
extract signed integral and fractional values from floating-point number
moncontrol(3), monstartup(3)
control execution profile
mpool(3)
shared memory buffer pool
multibyte(3), mblen(3), mbstowcs(3), mbtowc(3), wcstombs(3), wctomb(3)
multibyte character support for C
nice(3)
set program scheduling priority
nlist(3)
retrieve symbol table name list from an executable file
ns(3), ns_addr(3), ns_ntoa(3)
Xerox NS Ns (tm) address conversion routines
parsedate(3)
convert time and date string to number
pause(3)
stop until signal
perror(3), strerror(3), sys_errlist(3), sys_nerr(3)
system error messages
popen(3), pclose(3)
process I/O
printf(3), fprintf(3), sprintf(3), snprintf(3), vprintf(3), vfprintf(3), vsprintf(3), vsnprintf(3)
formatted output conversion
psignal(3), sys_siglist(3), sys_signame(3)
system signal messages
pwcache(3)
cache password and group entries
qio(3)
quick I/O part of InterNetNews library
qsort(3), heapsort(3), mergesort(3)
sort functions
queue(3), LIST_ENTRY(3), LIST_HEAD(3), LIST_INIT(3), LIST_INSERT_AFTER(3), LIST_INSERT_BEFORE(3), LIST_INSERT_HEAD(3), LIST_REMOVE(3), TAILQ_ENTRY(3), TAILQ_HEAD(3), TAILQ_INIT(3), TAILQ_INSERT_AFTER(3), TAILQ_INSERT_BEFORE(3), TAILQ_INSERT_HEAD(3), TAILQ_INSERT_TAIL(3), TAILQ_REMOVE(3), CIRCLEQ_ENTRY(3), CIRCLEQ_HEAD(3), CIRCLEQ_INIT(3), CIRCLEQ_INSERT_AFTER(3), CIRCLEQ_INSERT_BEFORE(3), CIRCLEQ_INSERT_HEAD(3), CIRCLEQ_INSERT_TAIL(3), CIRCLEQ_REMOVE(3)
implementations of lists, tail queues, and circular queues
radixsort(3)
radix sort
raise(3)
send a signal to the current process
rand(3), srand(3)
bad random number generator
random(3), srandom(3), initstate(3), setstate(3)
better random number generator; routines for changing generators
rcmd(3), rresvport(3), ruserok(3)
routines for returning a stream to a remote command
re_comp(3), re_exec(3)
regular expression handler
realloc(3)
reallocation of memory function
realpath(3)
returns the canonicalized absolute pathname
recno(3)
record number database access method
regex(3), regcomp(3), regexec(3), regerror(3), regfree(3)
regular-expression library
regexp(3), regcomp(3), regexec(3), regsub(3), regerror(3)
regular expression handlers
remove(3)
remove directory entry
resolver(3), res_query(3), res_search(3), res_mkquery(3), res_send(3), res_init(3), dn_comp(3), dn_expand(3)
resolver routines
rexec(3)
return stream to a remote command
rindex(3)
locate character in string
rint(3)
round-to-closest integer functions
rune(3), setrunelocale(3), setinvalidrune(3), sgetrune(3), sputrune(3)
rune support for C
scandir(3), alphasort(3)
scan a directory
scanf(3), fscanf(3), sscanf(3), vscanf(3), vsscanf(3), vfscanf(3)
input format conversion
setbuf(3), setbuffer(3), setlinebuf(3), setvbuf(3)
stream buffering operations
setjmp(3), sigsetjmp(3)
siglongjmp, setjmp, longjmp, _setjmp, _longjmp longjmperror non-local jumps
setlocale(3), localeconv(3)
natural language formatting for C
setruid(3), setrgid(3)
set user and group ID
siginterrupt(3)
allow signals to interrupt system calls
signal(3)
simplified software signal facilities
sigsetops(3), sigemptyset(3), sigfillset(3), sigaddset(3), sigdelset(3), sigismember(3)
manipulate signal sets
sin(3)
sine function
sinh(3)
hyperbolic sine function
sleep(3)
suspend process execution for interval of seconds
stdarg(3)
variable argument lists
stdio(3)
standard input/output library functions
strcasecmp(3)
compare strings, ignoring case
strcat(3)
concatenate strings
strcat(3), strncat(3), strchr(3), strrchr(3), strcmp(3), strncmp(3), strcasecmp(3), strncasecmp(3), strcpy(3), strncpy(3), strerror(3), strlen(3), strpbrk(3), strsep(3), strspn(3), strcspn(3), strstr(3), strtok(3), index(3), rindex(3)
string specific functions
strchr(3)
locate character in string
strcmp(3)
compare strings
strcoll(3)
compare strings according to current collation
strcpy(3)
copy strings
strcspn(3)
span the complement of a string
strdup(3)
save a copy of a string
strftime(3)
format date and time
strlen(3)
find length of string
strmode(3)
convert inode status information into a symbolic string
strpbrk(3)
locate multiple characters in string
strrchr(3)
locate character in string
strsep(3)
separate strings
strspn(3)
span a string
strstr(3)
locate a substring in a string
strtod(3)
convert ASCII string to double
strtok(3)
string tokens
strtol(3), strtoq(3)
convert string value to a long or quad_t integer
strtoul(3), strtouq(3)
convert a string to an unsigned long or uquad_t integer
strxfrm(3)
transform a string under locale
stty(3), gtty(3)
set and get terminal state (defunct)
swab(3)
swap adjacent bytes
sysconf(3)
get configurable system variables
sysctl(3)
get or set system information
syslog(3), vsyslog(3), openlog(3), closelog(3), setlogmask(3)
control system log
system(3)
pass a command to the shell
tan(3)
tangent function
tanh(3)
hyperbolic tangent function
tcgetpgrp(3)
get foreground process group ID
tcsendbreak(3), tcdrain(3), tcflush(3), tcflow(3)
line control functions
tcsetpgrp(3)
set foreground process group ID
tempnam(3), tmpfile(3), tmpnam(3)
temporary file routines
termcap(3), tgetent(3), tgetnum(3), tgetflag(3), tgetstr(3), tgoto(3), tputs(3)
terminal independent operation routines
tf_util(3), tf_init(3), tf_get_pname(3), tf_get_pinst(3), tf_get_cred(3), tf_close(3)
routines for manipulating a Kerberos ticket file
time(3)
get time of day
times(3)
process times
timezone(3)
return the timezone abbreviation
toascii(3)
convert a byte to 7-bit ASCII
tolower(3)
upper case to lower case letter conversion
toupper(3)
lower case to upper case letter conversion
ttyname(3), isatty(3), ttyslot(3)
get name of associated terminal (tty) from file descriptor
tzset(3), tzsetwall(3)
initialize time conversion information
ualarm(3)
schedule signal after specified time
uname(3)
get system identification
ungetc(3)
un-get character from input stream
unvis(3), strunvis(3)
decode a visual representation of characters
usleep(3)
suspend execution for interval of microseconds
utime(3)
set file times
valloc(3)
aligned memory allocation function
vis(3)
visually encode characters
vlimit(3)
control maximum system resource consumption
vtimes(3)
get information about resource utilization
wildmat(3)
perform shell-style wildcard matching
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