Returns a string name (either a resolved name or IPv4/IPv6 name in a
string if unresolvable. The caller is responsible for freeing the
string.
Signed-off-by: Jeff Squyres <jsquyres@cisco.com>
Regular files are always write-ready, so non-blocking I/O does not
give any benefits for them.
More than that - if libevent is using "epoll" to track fd events,
epoll_ctl will refuse attempt to add an fd pointing to a regular
file descriptor with EPERM.
This fix checks the object referenced by fd and avoids event_add
using event_active instead.
In the original configuration that uncovered this issue "epoll"
was used in libevent, it was triggering the following warning
message:
"[warn] Epoll ADD(1) on fd 0 failed. Old events were 0; read
change was 1 (add); write change was 0 (none): Operation not
permitted"
And the side effect was accumulation of all output in mpirun
memory and actually writing it only at mpirun exit.
Signed-off-by: Artem Polyakov <artpol84@gmail.com>
code.
This commit fixes minor errors in the incorrectly-committed r31513
(new fd close-on-exec convenience function).
Refs trac:4550
This commit was SVN r31514.
The following SVN revision numbers were found above:
r31513 --> open-mpi/ompi@e1655ae68d
The following Trac tickets were found above:
Ticket 4550 --> https://svn.open-mpi.org/trac/ompi/ticket/4550
Paul Hargrove pointed out that Stevens tells us that we should
FD_GETFL before FD_SETFL. And so we shall.
Make a new convenience function to do this (opal_fd_set_cloexec()),
just so that we don't have to litter this 2-step process throughout
the code.
Refs trac:4550
This commit was SVN r31513.
The following Trac tickets were found above:
Ticket 4550 --> https://svn.open-mpi.org/trac/ompi/ticket/4550
file descriptor (i.e., read and write complete messages, transparently
handling partial reads/writes, EAGAIN, and EINTR).
This code effectively already exists in a few places in the code base;
this is mainly a consolidation.
This commit was SVN r23450.
