90 lines
1.9 KiB
C
90 lines
1.9 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 2018 Denys Vlasenko
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//config:config FLOAT_DURATION
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//config: bool "Enable fractional duration arguments"
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//config: default y
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//config: help
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//config: Allow sleep N.NNN, top -d N.NNN etc.
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//kbuild:lib-$(CONFIG_SLEEP) += duration.o
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//kbuild:lib-$(CONFIG_TOP) += duration.o
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//kbuild:lib-$(CONFIG_TIMEOUT) += duration.o
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//kbuild:lib-$(CONFIG_PING) += duration.o
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//kbuild:lib-$(CONFIG_PING6) += duration.o
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//kbuild:lib-$(CONFIG_WATCH) += duration.o
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#include "libbb.h"
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static const struct suffix_mult duration_suffixes[] ALIGN_SUFFIX = {
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{ "s", 1 },
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{ "m", 60 },
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{ "h", 60*60 },
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{ "d", 24*60*60 },
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{ "", 0 }
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};
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#if ENABLE_FLOAT_DURATION
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duration_t FAST_FUNC parse_duration_str(char *str)
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{
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duration_t duration;
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if (strchr(str, '.')) {
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double d;
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char *pp;
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int len;
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char sv;
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# if ENABLE_LOCALE_SUPPORT
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/* Undo busybox.c: on input, we want to use dot
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* as fractional separator in strtod(),
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* regardless of current locale
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*/
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setlocale(LC_NUMERIC, "C");
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# endif
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len = strspn(str, "0123456789.");
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sv = str[len];
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str[len] = '\0';
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errno = 0;
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d = strtod(str, &pp);
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if (errno || *pp)
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bb_show_usage();
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str += len;
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*str-- = sv;
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sv = *str;
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*str = '1';
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duration = d * xatoul_sfx(str, duration_suffixes);
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*str = sv;
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} else {
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duration = xatoul_sfx(str, duration_suffixes);
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}
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return duration;
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}
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void FAST_FUNC sleep_for_duration(duration_t duration)
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{
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struct timespec ts;
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ts.tv_sec = MAXINT(typeof(ts.tv_sec));
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ts.tv_nsec = 0;
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if (duration >= 0 && duration < ts.tv_sec) {
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ts.tv_sec = duration;
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ts.tv_nsec = (duration - ts.tv_sec) * 1000000000;
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}
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do {
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errno = 0;
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nanosleep(&ts, &ts);
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} while (errno == EINTR);
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}
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#else
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duration_t FAST_FUNC parse_duration_str(char *str)
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{
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return xatou_range_sfx(str, 0, UINT_MAX, duration_suffixes);
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}
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#endif
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