Follow-up Comment #2, bug #33134 (project make):
My original one-line patch had two mistakes, which may be a record! In the
course of work for enhancement #33138 I made a macro:
#define STREAM_OK(strm) ((fcntl(fileno((strm)), F_GETFD) != -1) || (errno !=
EBADF))
whose logic would be much better than the original ftell(). Turns out that on
many platforms ftell cannot be used on a non-seekable descriptor at all. My
development is on Solaris where ftell works as a go/no-go indicator, but that
isn't portable. And the EBADF test is required for reasons which are obvious
and also discussed in the email thread.
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