Data update

Task/Call-a-function-in-a-shared-library/COBOL/call-a-function-in-a-shared-library.cob

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+       identification division.
+       program-id. callsym.
+
+       data division.
+       working-storage section.
+       01 handle usage pointer.
+       01 addr   usage program-pointer.
+
+       procedure division.
+       call "dlopen" using
+           by reference null
+           by value 1
+           returning handle
+           on exception
+               display function exception-statement upon syserr
+               goback
+       end-call
+       if handle equal null then
+           display function module-id ": error getting dlopen handle"
+             upon syserr
+           goback
+       end-if
+
+       call "dlsym" using
+           by value handle
+           by content z"perror"
+           returning addr
+       end-call
+       if addr equal null then
+           display function module-id ": error getting perror symbol"
+              upon syserr
+       else
+           call addr returning omitted
+       end-if
+
+       goback.
+       end program callsym.