On Sat, 2 Sep 2017 21:24:35 +0000, scott Ford wrote:
>
>How can a LE enable application, using COBOL, C , etc. call UNIX services,
>perform a function a UNIX function
>And retrieving output back to COBOL..hence I would have to , have COBOL
>call C issue 'popen' build pipe, send commands
>Etc.., is this correct ?
>
First, I'm COBOL-ignorant,
I believe (I'm not doing a lot of research) popen() is not a system call but a
CRTL function.
You'd probably need a C bridge.
popen() returns a stream pointer (FILE *), not likely to be useful in COBOL.
The command is an argument to popen() It may be a compound.
I might imagin in C:
int filedes[ 2 ]
pipe( filedes )
popen( "cmd1; cmd2; ...; } >filedes[ 1 ] 2>&1", "r" ); /* omitting needed
sprintf(); */
(Would it be easier to use spawn() rather than popen()?)
In COBOL (or C):
call BPXWDYN( alloc dd(DDNAME) path( /dev/fd/filedes[ 0 ] ) filedata(TEXT)
... " )
(or however you do a DYNALLOC in COBOL.)
Then OPEN and READ command output from DDNAME.
I suspect John M. (or Charles M.) might know far more, if you choose to
impose on them.
-- gil
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