#include <net-snmp/net-snmp-config.h>

#include <stdio.h>

#if HAVE_DIRENT_H

#include <dirent.h>

#endif

#if HAVE_UNISTD_H

#include <unistd.h>

#endif

#include <net-snmp/agent/netsnmp_close_fds.h>

/**

 * Close all file descriptors larger than @fd.

 */

void netsnmp_close_fds(int fd)

{

#if defined(HAVE_FORK)

    DIR            *dir;

    struct dirent  *ent;

    int             i, largest_fd = -1;

    if (fd < -1)

        fd = -1;

    if ((dir = opendir("/proc/self/fd"))) {

        while ((ent = readdir(dir))) {

            if (sscanf(ent->d_name, "%d", &i) == 1) {

                if (i > largest_fd)

                    largest_fd = i;

            }

        }

        closedir(dir);

    } else {

        largest_fd = getdtablesize() - 1;

    }

    for (i = largest_fd; i > fd && i >= 0; i--)

        close(i);

#endif

}