re: close all open file descriptors portably
well, if one is on a POSIX system, _SC_OPEN_MAX gives the max integer.
Then just close them all.
Here's my usual recipe for this:
# close all open file descriptors
my $max_fd = POSIX::sysconf(&POSIX::_SC_OPEN_MAX);
$max_fd = ((! defined $max_fd) || $max_fd < 0) ? 64 : $max_fd;
while (--$max_fd >= 0) {
next if ($max_fd == fileno($pid_fh));
POSIX::close($max_fd);
}
# now reopen std{in,out,err} on /dev/null
open(STDIN, "+>/dev/null");
open(STDOUT, "+>&STDIN");
open(STDERR, "+>&STDIN");
Proc::Daemon does the same thing...
HTH,
-- jeff
On 2/20/10 1:10 PM, "Torsten Förtsch" <[email protected]> wrote:
> - is there a portable way to get all open file descriptors of the current
> process? Under Linux one can readdir(/proc/self/fd). On Darwin I once simply
