Please describe the problem:
g_io_unix_close (..) in giounix.c does not correctly handle the condition where close(..) returns <0 with errno set to EINTR. The function should retry closing the channel's associated resource when this occurs, but instead returns a G_IO_STATUS_ERROR to the caller.

EINTR is correctly handled in g_io_unix_read (..) and g_io_unix_write (..), so should be handled in g_io_unix_close for consistent behavior.


Steps to reproduce:
1. Send SIGINT to application at the same time close (..) is called inside g_io_unix_close (..)
2. 
3. 


Actual results:
g_io_unix_close (..) returns G_IO_STATUS_ERROR.

Expected results:
g_io_unix_close (..) should retry closing its associated resource until it succeeds or another type of error occurs.

Does this happen every time?
Yes

Other information:
The bug was originally noticed in glib-2.16.5 and is still present in svn head.