42 lines
826 B
C
42 lines
826 B
C
#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
|
|
}
|