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