Hi Eric, > >> I think we'll need to fall back to a #if based on platforms. > > > > If I'm reading the POSIX bug correctly, HPUX is the only system where > > fds are left open on EINTR.
Early Solaris is definitely in this camp as well. > > Seems like a reasonable enough #if when > > coupled with good comments pointing back to the POSIX discussion. > > One other possible alternative: instead of calling close(fd) on a random > unknown fd, and worrying about the non-portability of EINTR behavior > when that fd is something that takes a long time to close, you could use > dup2()'s semantics to replace the original fd with something known to be > safe to close (for example, closing an fd open on /dev/null doesn't have > the risk of EINTR like you would have with closing an fd open on a pty > or tape device). This is an interesting, creative idea. However, because few people use this 'dup2 as a kind of atomic close' workaround, I fear that it might lead us into the proximity of OS bugs. Hardly anyone has tested how dup2 works in the presence of signals and ttys, in the past. Bruno
