1 /* vi: set sw=4 ts=4: */
2 /*
3 * Various system configuration helpers.
4 *
5 * Copyright (C) 2014 Bartosz Golaszewski <bartekgola@gmail.com>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
8 */
9 #include "libbb.h"
10
11 #if !defined(bb_arg_max)
bb_arg_max(void)12 unsigned FAST_FUNC bb_arg_max(void)
13 {
14 long r = sysconf(_SC_ARG_MAX);
15
16 /* I've seen a version of uclibc which returned -1.
17 * Guard about it, and also avoid insanely large values
18 */
19 if ((unsigned long)r > 64*1024*1024)
20 r = 64*1024*1024;
21
22 return r;
23 }
24 #endif
25
26 /* Return the number of clock ticks per second. */
bb_clk_tck(void)27 unsigned FAST_FUNC bb_clk_tck(void)
28 {
29 return sysconf(_SC_CLK_TCK);
30 }
31