08-09-2011
try using \\r instead of \r
Otherwise it will be interpreted as carriage control
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IOINIT(3F) IOINIT(3F)
NAME
ioinit - change f77 I/O initialization
SYNOPSIS
logical function ioinit (cctl, bzro, apnd, prefix, vrbose)
logical cctl, bzro, apnd, vrbose
character*(*) prefix
DESCRIPTION
This routine will initialize several global parameters in the f77 I/O system, and attach externally defined files to logical units at run
time. The effect of the flag arguments applies to logical units opened after ioinit is called. The exception is the preassigned units, 5
and 6, to which cctl and bzro will apply at any time. Ioinit is written in Fortran-77.
By default, carriage control is not recognized on any logical unit. If cctl is .true. then carriage control will be recognized on format-
ted output to all logical units except unit 0, the diagnostic channel. Otherwise the default will be restored.
By default, trailing and embedded blanks in input data fields are ignored. If bzro is .true. then such blanks will be treated as zeros.
Otherwise the default will be restored.
By default, all files opened for sequential access are positioned at their beginning. It is sometimes necessary or convenient to open at
the END-OF-FILE so that a write will append to the existing data. If apnd is .true. then files opened subsequently on any logical unit
will be positioned at their end upon opening. A value of .false. will restore the default behavior.
Ioinit may be used to associate file names with Fortran logical unit numbers through environment variables (see "Introduction to the f77
I/O Library" for a more general way of doing this). If the argument prefix is a non-blank string, then names of the form prefixNN will be
sought in the program environment. The value associated with each such name found will be used to open logical unit NN for formatted
sequential access. For example, if f77 program myprogram included the call
call ioinit (.true., .false., .false., 'FORT', .false.)
then when the following sequence
% setenv FORT01 mydata
% setenv FORT12 myresults
% myprogram
would result in logical unit 1 opened to file mydata and logical unit 12 opened to file myresults. Both files would be positioned at their
beginning. Any formatted output would have column 1 removed and interpreted as carriage control. Embedded and trailing blanks would be
ignored on input.
If the argument vrbose is .true. then ioinit will report on its activity.
The effect of
call ioinit (.true., .true., .false., '', .false.)
can be achieved without the actual call by including ``-lI66'' on the f77 command line. This gives carriage control on all logical units
except 0, causes files to be opened at their beginning, and causes blanks to be interpreted as zero's.
The internal flags are stored in a labeled common block with the following definition:
integer*2 ieof, ictl, ibzr
common /ioiflg/ ieof, ictl, ibzr
FILES
/usr/lib/libI77.a f77 I/O library
/usr/lib/libI66.a sets older fortran I/O modes
SEE ALSO
getarg(3F), getenv(3F), ``Introduction to the f77 I/O Library''
BUGS
Prefix can be no longer than 30 characters. A pathname associated with an environment name can be no longer than 255 characters.
The ``+'' carriage control does not work.
4.2 Berkeley Distribution May 27, 1986 IOINIT(3F)