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/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) 2007 Denys Vlasenko
*
* Licensed under GPL version 2, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
void FAST_FUNC parse_datestr(const char *date_str, struct tm *tm_time)
{
char end = '\0';
const char *last_colon = strrchr(date_str, ':');
if (last_colon != NULL) {
/* Parse input and assign appropriately to tm_time */
/* HH:MM */
if (sscanf(date_str, "%u:%u%c",
&tm_time->tm_hour,
&tm_time->tm_min,
&end) >= 2) {
/* no adjustments needed */
} else
/* mm.dd-HH:MM */
if (sscanf(date_str, "%u.%u-%u:%u%c",
&tm_time->tm_mon, &tm_time->tm_mday,
&tm_time->tm_hour, &tm_time->tm_min,
&end) >= 4) {
/* Adjust month from 1-12 to 0-11 */
tm_time->tm_mon -= 1;
} else
/* yyyy.mm.dd-HH:MM */
if (sscanf(date_str, "%u.%u.%u-%u:%u%c", &tm_time->tm_year,
&tm_time->tm_mon, &tm_time->tm_mday,
&tm_time->tm_hour, &tm_time->tm_min,
&end) >= 5) {
tm_time->tm_year -= 1900; /* Adjust years */
tm_time->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
} else
/* yyyy-mm-dd HH:MM */
if (sscanf(date_str, "%u-%u-%u %u:%u%c", &tm_time->tm_year,
&tm_time->tm_mon, &tm_time->tm_mday,
&tm_time->tm_hour, &tm_time->tm_min,
&end) >= 5) {
tm_time->tm_year -= 1900; /* Adjust years */
tm_time->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
//TODO: coreutils 6.9 also accepts "yyyy-mm-dd HH" (no minutes)
} else {
bb_error_msg_and_die(bb_msg_invalid_date, date_str);
}
if (end == ':') {
/* xxx:SS */
if (sscanf(last_colon + 1, "%u%c", &tm_time->tm_sec, &end) == 1)
end = '\0';
/* else end != NUL and we error out */
}
} else {
/* Googled the following on an old date manpage:
*
* The canonical representation for setting the date/time is:
* cc Century (either 19 or 20)
* yy Year in abbreviated form (e.g. 89, 06)
* mm Numeric month, a number from 1 to 12
* dd Day, a number from 1 to 31
* HH Hour, a number from 0 to 23
* MM Minutes, a number from 0 to 59
* .SS Seconds, a number from 0 to 61 (with leap seconds)
* Everything but the minutes is optional
*
* This coincides with the format of "touch -t TIME"
*/
int len = strchrnul(date_str, '.') - date_str;
/* MM[.SS] */
if (len == 2 && sscanf(date_str, "%2u%2u%2u%2u%2u%c" + 12,
&tm_time->tm_min,
&end) >= 1) {
} else
/* HHMM[.SS] */
if (len == 4 && sscanf(date_str, "%2u%2u%2u%2u%2u%c" + 9,
&tm_time->tm_hour,
&tm_time->tm_min,
&end) >= 2) {
} else
/* ddHHMM[.SS] */
if (len == 6 && sscanf(date_str, "%2u%2u%2u%2u%2u%c" + 6,
&tm_time->tm_mday,
&tm_time->tm_hour,
&tm_time->tm_min,
&end) >= 3) {
} else
/* mmddHHMM[.SS] */
if (len == 8 && sscanf(date_str, "%2u%2u%2u%2u%2u%c" + 3,
&tm_time->tm_mon,
&tm_time->tm_mday,
&tm_time->tm_hour,
&tm_time->tm_min,
&end) >= 4) {
/* Adjust month from 1-12 to 0-11 */
tm_time->tm_mon -= 1;
} else
/* yymmddHHMM[.SS] */
if (len == 10 && sscanf(date_str, "%2u%2u%2u%2u%2u%c",
&tm_time->tm_year,
&tm_time->tm_mon,
&tm_time->tm_mday,
&tm_time->tm_hour,
&tm_time->tm_min,
&end) >= 5) {
/* Adjust month from 1-12 to 0-11 */
tm_time->tm_mon -= 1;
} else
/* ccyymmddHHMM[.SS] */
if (len == 12 && sscanf(date_str, "%4u%2u%2u%2u%2u%c",
&tm_time->tm_year,
&tm_time->tm_mon,
&tm_time->tm_mday,
&tm_time->tm_hour,
&tm_time->tm_min,
&end) >= 5) {
tm_time->tm_year -= 1900; /* Adjust years */
tm_time->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
} else {
bb_error_msg_and_die(bb_msg_invalid_date, date_str);
}
if (end == '.') {
/* xxx.SS */
if (sscanf(strchr(date_str, '.') + 1, "%u%c",
&tm_time->tm_sec, &end) == 1)
end = '\0';
/* else end != NUL and we error out */
}
}
if (end != '\0') {
bb_error_msg_and_die(bb_msg_invalid_date, date_str);
}
}
time_t FAST_FUNC validate_tm_time(const char *date_str, struct tm *tm_time)
{
time_t t = mktime(tm_time);
if (t == (time_t) -1L) {
bb_error_msg_and_die(bb_msg_invalid_date, date_str);
}
return t;
}
#if ENABLE_MONOTONIC_SYSCALL
#include <sys/syscall.h>
/* Old glibc (< 2.3.4) does not provide this constant. We use syscall
* directly so this definition is safe. */
#ifndef CLOCK_MONOTONIC
#define CLOCK_MONOTONIC 1
#endif
/* libc has incredibly messy way of doing this,
* typically requiring -lrt. We just skip all this mess */
static void get_mono(struct timespec *ts)
{
if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts))
bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
}
unsigned long long FAST_FUNC monotonic_ns(void)
{
struct timespec ts;
get_mono(&ts);
return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
}
unsigned long long FAST_FUNC monotonic_us(void)
{
struct timespec ts;
get_mono(&ts);
return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
}
unsigned FAST_FUNC monotonic_sec(void)
{
struct timespec ts;
get_mono(&ts);
return ts.tv_sec;
}
#else
unsigned long long FAST_FUNC monotonic_ns(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
}
unsigned long long FAST_FUNC monotonic_us(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec * 1000000ULL + tv.tv_usec;
}
unsigned FAST_FUNC monotonic_sec(void)
{
return time(NULL);
}
#endif
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