blob: 8c1caef5cd73e7d367d1af261a6137b98d59b4e7
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) |
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. */ |
27 | unsigned FAST_FUNC bb_clk_tck(void) |
28 | { |
29 | return sysconf(_SC_CLK_TCK); |
30 | } |
31 |