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abort(3)
cause abnormal program termination
abs(3)
return the absolute value of an integer
alarm(3)
schedule signal after specified time
asctime(3), ctime(3), difftime(3), gmtime(3), localtime(3), mktime(3), tzset(3), tzsetwall(3)
convert date and time to ASCII
asinh(3), acosh(3), atanh(3)
inverse hyperbolic functions
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(3), bit_decl(3), bit_ffs(3), bit_nclear(3), bit_nset(3), bit_set(3), bitstr_size(3), bit_test(3)
bit-string manipulation macros
bsearch(3)
binary search of a sorted table
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
cbrt(3), sqrt(3)
cube root, square root
clock(3)
determine processor time used
ctype(3), isalpha(3), isupper(3), islower(3), isdigit(3), isxdigit(3), isalnum(3), isspace(3), ispunct(3), isprint(3), isgraph(3), iscntrl(3), isascii(3), toupper(3), tolower(3), toascii(3)
character classification macros
curses(3)
screen functions with ``optimal'' cursor motion
dbm(3), dbminit(3), fetch(3), store(3), delete(3), firstkey(3), nextkey(3)
data base subroutines
des3(3), desinit(3), setkey(3), endes(3), dedes(3), desdone(3)
DES encryption
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
ecvt(3), fcvt(3), gcvt(3)
output conversion
en(4)
Xerox 3 Mb/s Ethernet interface
erf(3), erfc(3)
error functions
execl(3), execv(3), execle(3), execlp(3), execvp(3), exec(3), execve(3), exect(3), environ(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
fabs(3), floor(3), ceil(3), rint(3)
absolute value, floor, ceiling, and round-to-nearest functions
fclose(3), fflush(3)
close or flush a stream
ferror(3), feof(3), clearerr(3), fileno(3)
stream status inquiries
ffs(3)
find first bit set in a bit string
fgets(3)
get a line from a stream
fnmatch(3)
match filename or pathname
fopen(3), freopen(3), fdopen(3)
open a stream
fprintf(3), printf(3), sprintf(3), vprintf(3), vfprintf(3), vsprintf(3)
formatted output conversion
fread(3), fwrite(3)
buffered binary input/output
frexp(3), ldexp(3), modf(3)
split into mantissa and exponent
fseek(3), ftell(3), rewind(3)
reposition a stream
fts(3)
traverse a file hierarchy
getc(3), getchar(3), fgetc(3), getw(3)
get character or word from stream
getdiskbyname(3)
get generic disk description by its name
getenv(3), putenv(3), setenv(3), unsetenv(3)
manipulate environmental variables
getfsent(3), getfsspec(3), getfsfile(3), setfsent(3), endfsent(3)
get file system descriptor file entry
getgrent(3), getgrnam(3), getgrgid(3), setgroupent(3), setgrfile(3), setgrent(3), endgrent(3)
get group file entry
gethostbyname(3), gethostbyaddr(3), gethostent(3), sethostent(3), endhostent(3), herror(3)
get network host entry
getloadavg(3)
get system load averages
getmntinfo(3)
get information about mounted file systems
getmode(3), setmode(3)
modify mode bits
getnetent(3), getnetbyaddr(3), getnetbyname(3), setnetent(3), endnetent(3)
get network entry
getopt(3)
get option letter from argv
getpass(3)
read a password
getprotoent(3), getprotobynumber(3), getprotobyname(3), setprotoent(3), endprotoent(3)
get protocol entry
getpwent(3), getpwnam(3), getpwuid(3), setpassent(3), setpwfile(3), setpwent(3), endpwent(3)
get password file entries
gets(3)
get a line from stdin
getservent(3), getservbyport(3), getservbyname(3), setservent(3), endservent(3)
get service entry
getttyent(3), getttynam(3), setttyent(3), endttyent(3)
get ttys file entry
getusershell(3), setusershell(3), endusershell(3)
get legal user shells
getwd(3)
get current working directory pathname
glob(3), globfree(3)
generate pathnames matching a pattern
hypot(3), cabs(3)
Euclidean distance, complex absolute value
ieee(3), copysign(3), drem(3), finite(3), logb(3), scalb(3)
copysign, remainder, exponent manipulations
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
insque(3), remque(3)
insert/remove element from a queue
j0(3), j1(3), jn(3), y0(3), y1(3), yn(3)
bessel functions
labs(3)
return the absolute value of a long integer
ldiv(3)
return quotient and remainder from division
lgamma(3)
log gamma function
lsearch(3), lfind(3)
linear searching routines
malloc(3), free(3), realloc(3), calloc(3), alloca(3)
memory allocator
math(3)
introduction to mathematical library functions
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)
create a unique file name
ndbm(3), dbm_open(3), dbm_close(3), dbm_fetch(3), dbm_store(3), dbm_delete(3), dbm_firstkey(3), dbm_nextkey(3), dbm_error(3), dbm_clearerr(3)
data base subroutines
nice(3)
set program priority
nlist(3)
get entries from name list
ns(3), ns_addr(3), ns_ntoa(3)
Xerox NS(tm) address conversion routines
pause(3)
stop until signal
perror(3), strerror(3), sys_errlist(3), sys_nerr(3)
system error messages
popen(3), pclose(3)
initiate I/O to/from a process
psignal(3), sys_siglist(3)
system signal messages
putc(3), putchar(3), fputc(3), putw(3)
put character or word on a stream
puts(3), fputs(3)
put a string on a stream
pwcache(3)
cache password and group entries
qsort(3)
quicker sort
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
regex(3), re_comp(3), re_exec(3)
regular expression handler
regexp(3), regcomp(3), regexec(3), regsub(3), regerror(3)
regular expression handler
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
scandir(3), alphasort(3)
scan a directory
scanf(3), fscanf(3), sscanf(3)
formatted input conversion
setbuf(3), setbuffer(3), setlinebuf(3)
assign buffering to a stream
setuid(3), seteuid(3), setruid(3), setgid(3), setegid(3), setrgid(3)
set user and group ID
siginterrupt(3)
allow signals to interrupt system calls
signal(3)
simplified software signal facilities
sigsetjmp(3), siglongjmp(3), setjmp(3), longjmp(3), _setjmp(3), _longjmp longjmperror(3)
non-local jumps
sigsetops(3), sigemptyset(3), sigfillset(3), sigaddset(3), sigdelset(3), sigismember(3)
manipulate signal masks
sin(3), cos(3), tan(3), asin(3), acos(3), atan(3), atan2(3)
trigonometric functions and their inverses
sinh(3), cosh(3), tanh(3)
hyperbolic functions
sleep(3)
suspend execution for interval
stdio(3)
standard buffered input/output package
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 operations
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), strsep(3)
string token operations
strtol(3)
convert a string to a long integer
strtoul(3)
convert a string to an unsigned long integer
swab(3)
swap bytes
syslog(3), openlog(3), closelog(3), setlogmask(3), vsyslog(3)
control system log
system(3)
issue a shell command
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
time(3)
get time of day
ttyname(3), isatty(3), ttyslot(3)
find name of a terminal
ualarm(3)
schedule signal after specified time
ungetc(3)
push character back into input stream
unvis(3), strunvis(3)
decode a visual representation of characters
usleep(3)
suspend execution for interval
valloc(3)
aligned memory allocator
varargs(3)
variable argument lists
vis(3)
visually encode characters
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