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

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