42 lines
826 B
C
42 lines
826 B
C
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#include <net-snmp/net-snmp-config.h>
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#include <stdio.h>
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#if HAVE_DIRENT_H
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#include <dirent.h>
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#endif
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <net-snmp/agent/netsnmp_close_fds.h>
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/**
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* Close all file descriptors larger than @fd.
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*/
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void netsnmp_close_fds(int fd)
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{
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#if defined(HAVE_FORK)
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DIR *dir;
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struct dirent *ent;
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int i, largest_fd = -1;
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if (fd < -1)
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fd = -1;
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if ((dir = opendir("/proc/self/fd"))) {
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while ((ent = readdir(dir))) {
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if (sscanf(ent->d_name, "%d", &i) == 1) {
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if (i > largest_fd)
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largest_fd = i;
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}
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}
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closedir(dir);
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} else {
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largest_fd = getdtablesize() - 1;
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}
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for (i = largest_fd; i > fd && i >= 0; i--)
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close(i);
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#endif
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}
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