1#include <unistd.h>
2#include <errno.h>
3#include <fcntl.h>
4
5#ifdef __linux__
6#include <linux/limits.h>
7#endif
8
9#include "cron.h"
10
11int close_all(int start)
12{
13#ifdef F_CLOSEM
14	return fcntl(start, F_CLOSEM);
15#else
16	int fd, max;
17
18	max = sysconf(_SC_OPEN_MAX);
19	if (max <= 0)
20		return -1;
21
22#ifdef __linux__
23	if (max < NR_OPEN)
24		max = NR_OPEN;
25#endif
26
27	for (fd = start; fd < max; fd++) {
28		if (close(fd) && errno != EBADF)
29			return -1;
30	}
31
32	return 0;
33#endif
34}
35