NAME

intro − introduction to FORTRAN library functions

DESCRIPTION

This section describes the functions in the FORTRAN run time library.  These functions provide an interface from f77 programs to the system in the same manner as the C library does for C programs.  They are automatically loaded as needed by the Fortran compiler f77(1).

Most of these functions are in libU77.a.  Some are in libF77.a or libI77.a.  A few intrinsic functions are described for the sake of completeness. 

This release supports the 4.2/RT version of f77(1) and the run time library. It does not support the 4.3BSD level of the compiler. The following sections contain lists of the supported run time functions and of the 4.3BSD run time functions that are not supported.

For efficiency, the SCCS ID strings are not normally included in the a.out file. To include them, simply declare

 external f77lid
 

in any f77 module. 

LIST OF SUPPORTED FUNCTIONS

NameAppears on PageDescription
abortabort.3fterminate abruptly with memory image
accessaccess.3fdetermine accessibility of a file
alarmalarm.3fexecute a subroutine after a specified time
andbit.3fbitwise and
besselbessel.3fof two kinds for integer orders
chdirchdir.3fchange default directory
chmodchmod.3fchange mode of a file
ctimetime.3freturn system time
dffracflmin.3freturn extreme values
dflmaxflmin.3freturn extreme values
dflminflmin.3freturn extreme values
drandrand.3freturn random values
dtimeetime.3freturn elapsed execution time
etimeetime.3freturn elapsed execution time
exitexit.3fterminate process with status
fdatefdate.3freturn date and time in an ASCII string
ffracflmin.3freturn extreme values
fgetcgetc.3fget a character from a logical unit
flmaxflmin.3freturn extreme values
flminflmin.3freturn extreme values
flushflush.3fflush output to a logical unit
forkfork.3fcreate a copy of this process
fpecnttrpfpe.3ftrap and repair floating point faults
fputcputc.3fwrite a character to a fortran logical unit
fseekfseek.3freposition a file on a logical unit
fstatstat.3fget file status
ftellfseek.3freposition a file on a logical unit
gerrorperror.3fget system error messages
getarggetarg.3freturn command line arguments
getcgetc.3fget a character from a logical unit
getcwdgetcwd.3fget pathname of current working directory
getenvgetenv.3fget value of environment variables
getgidgetuid.3fget user or group ID of the caller
getloggetlog.3fget user’s login name
getpidgetpid.3fget process id
getuidgetuid.3fget user or group ID of the caller
gmtimetime.3freturn system time
hostnmhostnm.3fget name of current host
iargcgetarg.3freturn command line arguments
idateidate.3freturn date or time in numerical form
ierrnoperror.3fget system error messages
indexindex.3ftell about character objects
inmaxflmin.3freturn extreme values
introintro.3fintroduction to FORTRAN library functions
ioinitioinit.3fchange f77 I/O initialization
irandrand.3freturn random values
isattyttynam.3ffind name of a terminal port
itimeidate.3freturn date or time in numerical form
killkill.3fsend a signal to a process
lenindex.3ftell about character objects
linklink.3fmake a link to an existing file
lnblnkindex.3ftell about character objects
locloc.3freturn the address of an object
longlong.3finteger object conversion
lshiftbit.3fleft shift
lstatstat.3fget file status
ltimetime.3freturn system time
notbit.3fbitwise complement
orbit.3fbitwise or
perrorperror.3fget system error messages
putcputc.3fwrite a character to a fortran logical unit
qsortqsort.3fquick sort
randrand.3freturn random values
renamerename.3frename a file
rindexindex.3ftell about character objects
rshiftbit.3fright shift
shortlong.3finteger object conversion
signalsignal.3fchange the action for a signal
sleepsleep.3fsuspend execution for an interval
statstat.3fget file status
systemsystem.3fexecute a UNIX command
tclosetopen.3ff77 tape I/O
timetime.3freturn system time
topentopen.3ff77 tape I/O
trapertraper.3ftrap arithmetic errors
trapovtrapov.3ftrap and repair floating point overflow
treadtopen.3ff77 tape I/O
trewintopen.3ff77 tape I/O
trpfpetrpfpe.3ftrap and repair floating point faults
tskipftopen.3ff77 tape I/O
tstatetopen.3ff77 tape I/O
ttynamttynam.3ffind name of a terminal port
twritetopen.3ff77 tape I/O
unlinkunlink.3fremove a directory entry
waitwait.3fwait for a process to terminate
xorbit.3fbitwise exclusive or

LIST OF UNSUPPORTED 4.3BSD FUNCTIONS

NameAppears on PageDescription
arcplot.3ff77 interface to plot(3x)
boxplot.3ff77 interface to plot(3x)
circleplot.3ff77 interface to plot(3x)
closplplot.3ff77 interface to plot(3x)
contplot.3ff77 interface to plot(3x)
drandmrandom.3fbetter random number generator
eraseplot.3ff77 interface to plot(3x)
fallocmalloc.3fmemory allocator
freemalloc.3fmemory allocator
irandmrandom.3fbetter random number generator
labelplot.3ff77 interface to plot(3x)
lineplot.3ff77 interface to plot(3x)
linemdplot.3ff77 interface to plot(3x)
mallocmalloc.3fmemory allocator
moveplot.3ff77 interface to plot(3x)
openplplot.3ff77 interface to plot(3x)
pointplot.3ff77 interface to plot(3x)
randomrandom.3fbetter random number generator
spaceplot.3ff77 interface to plot(3x)
symlnksymlnk.3fmake a symbolic link

PRPQs 5799-WZQ/5799-PFF: IBM/4.3  —  July 1987