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Make error checking less zealous to handle devices like /dev/null
which don't provide a non-blocking interface. This is a short term "fix" which changes a half-lose to a half-win. The thread that accesses a device that does not provide a non-blocking interface will block for its time slice. A medium term solution would be to use rfork. A long-term solution would be some sort of kernel thread/SMP implementation.
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=24519
@ -29,6 +29,8 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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*
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*/
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#include <errno.h>
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#include <fcntl.h>
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@ -102,8 +104,14 @@ _thread_fd_table_init(int fd)
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/* Make the file descriptor non-blocking: */
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if (_thread_sys_fcntl(fd, F_SETFL,
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_thread_fd_table[fd]->flags | O_NONBLOCK) == -1)
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ret = errno;
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_thread_fd_table[fd]->flags | O_NONBLOCK) == -1) {
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/*
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* Some devices don't support
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* non-blocking calls (sigh):
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*/
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if (errno != ENODEV)
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ret = errno;
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}
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}
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/* Check if one of the fcntl calls failed: */
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