mike@bucasb.bu.edu (Michael Cohen) (07/11/88)
Does anybody know an easy way to popen a stream which can be passed
to Fortran and associated with a fortran Unit,. This is for a version
of BSD4.3 F77. What was already tried was a fortran open followed
by a dup2 using the fortran unit as a file descriptor as passed to C.
This doesn't seem to work. If anybody knows how to do this or
has the location of a routine which works this would be of interest.
karish@denali.stanford.edu (Chuck Karish) (07/11/88)
In article <584632927.3487@bucasb.bu.edu> mike@bucasb.bu.edu (Michael Cohen) writes: >Does anybody know an easy way to popen a stream which can be passed >to Fortran and associated with a fortran Unit,. This is for a version >of BSD4.3 F77. What was already tried was a fortran open followed >by a dup2 using the fortran unit as a file descriptor as passed to C. There's no really portable way to do this, even among different ports of 4.x. A colleague of mine wrote some code to do this under 4.2. It uses low-level calls within the stdio library, and depends on knowledge of exactly how a file descriptor and a FORTRAN logical unit are implemented. When I ported the code to Convex Unix (on a binary-only system), I had to guess about the changes in the internal interface. I got lucky, and it worked for a while. There's nothing to keep Convex from streamlining their stdio library and replacing or changing the name of one crucial interface, at which point my code dies. Chuck Karish ARPA: karish@denali.stanford.edu BITNET: karish%denali@forsythe.stanford.edu UUCP: {decvax,hplabs!hpda}!mindcrf!karish USPS: 1825 California St. #5 Mountain View, CA 94041