Re: How can a process easily get a list of all it's open fd?

[Mike Touloumtzis <miket@bluemug.com>]

On Tue, Aug 27, 2002 at 06:08:42PM +0200, Alex Riesen wrote:
> tricky. You can use /proc/<getpid>/fd, and close all
> handles listed here, but this has some caveats:
> it's _very_ slow if you have many open files.
> it's not portable.
> it's not safe if you have a thread/signal handler running.
> 
> i never heard of a right way to do this.
> 
> -alex
> 
> int close_all_fd()
> {
>     char fdpath[PATH_MAX];
>     DIR * dp;
>     struct dirent * de;
>     int fd;
> 
>     sprintf(fdpath, "/proc/%d/fd", getpid());
>     dp = opendir(fdpath);

This can just be:

	dp = opendir("/proc/self/fd/");

then you don't need fdpath.

You can use sigprocmask() if you're worried about signals coming
in during this operation.

miket