On 01/25/2011 10:02 PM, Eric Blake wrote: > test-dup2 and test-fcntl are failing on Haiku when using both the dup2 > and cloexec modules in tandem. I tested on Haiku alpha 2 (the latest > formal release per haiku-os.org) rather than a nightly build, so this > may have already been fixed by upstream development. But it seems like > I should be able to come up with workarounds.
Also:
$ cat foo.c
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
int main() {
int fd1;
int fd2;
int i;
fd1 = fcntl(0, F_DUPFD);
fcntl(fd1, F_SETFD, FD_CLOEXEC);
i = fcntl(fd1, F_GETFD);
printf("before %d\n", i);
fd2 = fcntl(fd1, F_DUPFD, fd2);
i = fcntl(fd1, F_GETFD);
printf("middle %d", i);
i = fcntl(fd2, F_GETFD);
printf(" %d\n", i);
fcntl(fd1, F_SETFD, FD_CLOEXEC);
i = fcntl(fd1, F_GETFD);
printf("after %d", i);
i = fcntl(fd2, F_GETFD);
printf(" %d\n", i);
return 0;
}
$ ./foo
before 1
middle 0 0
after 1 0
Oops - the mere act of duplicating an fd loses the FD_CLOEXEC bit on the
original; but at least it can be restored right after duplication.
--
Eric Blake ebl...@redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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