gpgme 0.4.2 setting errno to EOPNOTSUPP
Tue Aug 12 22:21:02 2003
(if this mail occurs twice: shame on me, the first went straight to the
list-admin, because I posted with a nonsubcribed sender address)
after porting gpgme 0.3.15 to MinGW to produce a DLL for an internal
project some time ago, I started porting 0.4.2 to actual MinGW versions.
After fiddling with autogen.sh there were only minor changes necessary
to compile a static lib. I will post a patch in the next few days to
this list, after verifying that everything works as aspected.
One problem still exists. gpgme_data_[read|write|seek] in data.c tries
to set errno to EOPNOTSUPP. This, however is not supported by MingW,
it just does not define this code.
To let the package compile I defined EOPNOTSUPP to be an otherwise
unused errno value, but this can only be an hack. So, I see two options:
change MinGW to include EOPNOTSUPP officialy or to change gpgme to
return an other code.
To illustrate, lets include a code snippet, taken from data.c:
gpgme_data_write (GpgmeData dh, const void *buffer, size_t size)
errno = EINVAL;
errno = EOPNOTSUPP;
return (*dh->cbs->write) (dh, buffer, size);
As long as I unterstand errno values, this *could* be changed to use
"more standard values" (meaning: other values, which are supported even
by MinGW;) in one of these ways:
- if dh is NULL, set errno to EBADF, if !dh->cbs->write, set it to
- just set errno to ENOSYS instead of EOPNOTSUPP
- set errno to a Windows-specific error code, like WSAEOPNOTSUPP or
ERROR_NOT_SUPPORTED, but these may or do conflict with errno values.
I'm hoping for some advice how to handle this.