UNIX® System Interface Table

Updated 2006-12-24, by Martin Borgman

These web pages contain tables of interfaces defined in the Single UNIX Specification Version 3, complete with an indication of their availability in other related standards, such as UNIX 98, UNIX 95, the ISO POSIX-1 standard, the ISO POSIX-2 standard, the ISO C standard, SVID3, 4.3BSD, the Linux Standard Base Specification version 1.3 and OpenVMS 7.3-2.

These tables are intended for porters of UNIX® applications to the OpenVMS 7.3-2 platform. It lists all the OpenVMS 7.3-2 interfaces either in the CRTL or other libraries, such as as POSIX Threads. If an interface is only available on the Alpfa® platform they are listed with the "α" sign.

In the near future all the interfaces that show non standard behavior will be marked.

The UNIX® System Interfaces are split into several tables and organized alphabetically:

UNIX® System Interfaces F
Interface	XSI	POSIX Base	U98	U95	P96 P92	C99	C89	SVID3	BSD	LSB 1.3	OpenVMS 7.3-2
fabs()	m	m	m	m	m	m	m	m	m	libm	m
fabsf()	m	m	.	.	.	m	.	.	.	libm	α
fabsl()	m	m	.	.	.	m	.	.	.	libm	α
fattach()	o	xsr	m	m	.	.	.	m	.	.	.
fchdir()	m	xsi	m	m	.	.	.	m	.	libc	.
fchmod()	m	m	m	m	.	.	.	m	m	libc	.
fchown()	m	m	m	m	.	.	.	m	m	libc	m
fclose()	m	m	m	m	m	m	m	m	m	libc	m
fcntl()	m	m	m	m	m	.	.	m	m	libc	m
fcvt()	l	xsi	m	m	.	.	.	.	m	libc	m
fdatasync()	o	sio	o	.	r	.	.	.	.	libc	.
FD_CLR()	m	m	m	m	.	.	.	.	.	.	m
fdetach()	o	xsr	m	m	.	.	.	m	.	.	.
fdim()	m	m	.	.	.	m	.	.	.	libm	α
fdimf()	m	m	.	.	.	m	.	.	.	libm	α
fdiml()	m	m	.	.	.	m	.	.	.	libm	α
FD_ISSET()	m	m	m	m	.	.	.	.	.	.	m
fdopen()	m	m	m	m	m	.	.	m	m	libc	m
FD_SET()	m	m	m	m	.	.	.	.	.	.	m
FD_ZERO()	m	m	m	m	.	.	.	.	.	.	m
feclearexcept()	m	m	.	.	.	m	.	.	.	libm	.
fegetenv()	m	m	.	.	.	m	.	.	.	libm	.
fegetexceptflag()	m	m	.	.	.	m	.	.	.	libm	.
fegetround()	m	m	.	.	.	m	.	.	.	libm	.
feholdexcept()	m	m	.	.	.	m	.	.	.	libm	.
feof()	m	m	m	m	m	m	m	m	m	libc	m
feraiseexcept()	m	m	.	.	.	m	.	.	.	libm	.
ferror()	m	m	m	m	m	m	m	m	m	libc	m
fesetenv()	m	m	.	.	.	m	.	.	.	libm	.
fesetexceptflag()	m	m	.	.	.	m	.	.	.	libm	.
fesetround()	m	m	.	.	.	m	.	.	.	libm	.
fetestexcept()	m	m	.	.	.	m	.	.	.	libm	.
feupdateenv()	m	m	.	.	.	m	.	.	.	libm	.
fflush()	m	m	m	m	m	m	m	m	m	libc	m
fflush_unlocked()	.	.	.	.	.	.	.	.	.	libc	.
ffs()	m	xsi	m	m	.	.	.	.	m	libc	m
fgetc()	m	m	m	m	m	m	m	m	m	libc	m
fgetpos()	m	m	m	m	.	m	m	m	.	libc	m
fgetpos64()	.	.	.	.	.	.	.	.	.	libc	.
fgets()	m	m	m	m	m	m	m	m	m	libc	m
fgetwc()	m	m	m	m	.	m	1	.	.	libc	m
fgetwc_unlocked()	.	.	.	.	.	.	.	.	.	libc	.
fgetws()	m	m	m	m	.	m	1	.	.	libc	m
fileno()	m	m	m	m	m	.	.	m	m	libc	m
finite()	.	.	.	.	.	.	.	.	.	libm	α
finitef()	.	.	.	.	.	.	.	.	.	libm	α
finitel()	.	.	.	.	.	.	.	.	.	libm	α
flock()	.	.	.	.	.	.	.	.	.	libc	.
flockfile()	m	tsf	m	.	t	.	.	.	.	libc	.
floor()	m	m	m	m	m	m	m	m	m	libm	m
floorf()	m	m	.	.	.	m	.	.	.	libm	α
floorl()	m	m	.	.	.	m	.	.	.	libm	α
fma()	m	m	.	.	.	m	.	.	.	libm	α
fmaf()	m	m	.	.	.	m	.	.	.	libm	α
fmal()	m	m	.	.	.	m	.	.	.	libm	α
fmax()	m	m	.	.	.	m	.	.	.	libm	α
fmaxf()	m	m	.	.	.	m	.	.	.	libm	α
fmaxl()	m	m	.	.	.	m	.	.	.	libm	α
fmin()	m	m	.	.	.	m	.	.	.	libm	α
fminf()	m	m	.	.	.	m	.	.	.	libm	α
fminl()	m	m	.	.	.	m	.	.	.	libm	α
fmod()	m	m	m	m	m	m	m	m	.	libm	m
fmodf()	m	m	.	.	.	m	.	.	.	libm	α
fmodl()	m	m	.	.	.	m	.	.	.	libm	α
fmtmsg()	m	xsi	m	m	.	.	.	m	.	libc	.
fnmatch()	m	m	m	m	m	.	.	.	.	libc	.
fopen()	m	m	m	m	m	m	m	m	m	libc	m
fopen64()	.	.	.	.	.	.	.	.	.	libc	.
fork()	m	m	m	m	m	.	.	m	m	libc	.
fpathconf()	m	m	m	m	m	.	.	m	.	libc	m
fpclassify()	m	m	.	.	.	m	.	.	.	.	.
__fpending()	.	.	.	.	.	.	.	.	.	libc	.
fprintf()	m	m	m	m	m	m	m	m	m	libc	m
fputc()	m	m	m	m	m	m	m	m	m	libc	m
fputs()	m	m	m	m	m	m	m	m	m	libc	m
fputwc()	m	m	m	m	.	m	1	.	.	libc	m
fputws()	m	m	m	m	.	m	1	.	.	libc	m
fread()	m	m	m	m	m	m	m	m	m	libc	m
free()	m	m	m	m	m	m	m	m	m	libc	m
freeaddrinfo()	m	m	.	.	.	.	.	.	.	libc	m
freopen()	m	m	m	m	m	m	m	m	m	libc	m
freopen64()	.	.	.	.	.	.	.	.	.	libc	.
frexp()	m	m	m	m	m	m	m	m	m	libm	m
frexpf()	m	m	.	.	.	m	.	.	.	libm	α
frexpl()	m	m	.	.	.	m	.	.	.	libm	α
fscanf()	m	m	m	m	m	m	m	m	m	libc	m
fseek()	m	m	m	m	m	m	m	m	m	libc	m
fseeko()	m	m	m	.	.	.	.	.	.	libc	m
fseeko64()	.	.	.	.	.	.	.	.	.	libc	.
fsetpos()	m	m	m	m	.	m	m	m	.	libc	m
fsetpos64()	.	.	.	.	.	.	.	.	.	libc	.
fstat()	m	m	m	m	m	.	.	m	m	.	m
fstatfs()	.	.	.	.	.	.	.	.	.	libc(ob)	.
fstatfs64()	.	.	.	.	.	.	.	.	.	libc(ob)	.
fstatvfs()	m	xsi	m	m	.	.	.	m	.	libc	m
fstatvfs64()	.	.	.	.	.	.	.	.	.	libc	.
fsync()	m	fsc	m	m	.	.	.	m	m	libc	m
ftell()	m	m	m	m	m	m	m	m	m	libc	m
ftello()	m	m	m	.	.	.	.	.	.	libc	m
ftello64()	.	.	.	.	.	.	.	.	.	libc	.
ftime()	l	xsi	m	m	.	.	.	.	m	libc	m
ftok()	m	xsi	m	m	.	.	.	.	.	libc	.
ftruncate()	m	m	m	m	.	.	.	.	.	libc	m
ftruncate64()	.	.	.	.	.	.	.