/*
* Utility routines.
*
- * Copyright (C) 2007 Denis Vlasenko
+ * Copyright (C) 2007 Denys Vlasenko
*
- * Licensed under GPL version 2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
-
#include "libbb.h"
+void FAST_FUNC parse_datestr(const char *date_str, struct tm *ptm)
+{
+ char end = '\0';
+ const char *last_colon = strrchr(date_str, ':');
+
+ if (last_colon != NULL) {
+ /* Parse input and assign appropriately to ptm */
+#if ENABLE_DESKTOP
+ const char *endp;
+#endif
+
+ /* HH:MM */
+ if (sscanf(date_str, "%u:%u%c",
+ &ptm->tm_hour,
+ &ptm->tm_min,
+ &end) >= 2
+ ) {
+ /* no adjustments needed */
+ } else
+ /* mm.dd-HH:MM */
+ if (sscanf(date_str, "%u.%u-%u:%u%c",
+ &ptm->tm_mon, &ptm->tm_mday,
+ &ptm->tm_hour, &ptm->tm_min,
+ &end) >= 4
+ ) {
+ /* Adjust month from 1-12 to 0-11 */
+ ptm->tm_mon -= 1;
+ } else
+ /* yyyy.mm.dd-HH:MM */
+ if (sscanf(date_str, "%u.%u.%u-%u:%u%c", &ptm->tm_year,
+ &ptm->tm_mon, &ptm->tm_mday,
+ &ptm->tm_hour, &ptm->tm_min,
+ &end) >= 5
+ /* yyyy-mm-dd HH:MM */
+ || sscanf(date_str, "%u-%u-%u %u:%u%c", &ptm->tm_year,
+ &ptm->tm_mon, &ptm->tm_mday,
+ &ptm->tm_hour, &ptm->tm_min,
+ &end) >= 5
+ ) {
+ ptm->tm_year -= 1900; /* Adjust years */
+ ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
+ } else
+#if ENABLE_DESKTOP /* strptime is BIG: ~1k in uclibc, ~10k in glibc */
+ /* month_name d HH:MM:SS YYYY. Supported by GNU date */
+ if ((endp = strptime(date_str, "%b %d %T %Y", ptm)) != NULL
+ && *endp == '\0'
+ ) {
+ return; /* don't fall through to end == ":" check */
+ } else
+#endif
+ {
+ bb_error_msg_and_die(bb_msg_invalid_date, date_str);
+ }
+ if (end == ':') {
+ /* xxx:SS */
+ if (sscanf(last_colon + 1, "%u%c", &ptm->tm_sec, &end) == 1)
+ end = '\0';
+ /* else end != NUL and we error out */
+ }
+ } else
+ if (strchr(date_str, '-')
+ /* Why strchr('-') check?
+ * sscanf below will trash ptm->tm_year, this breaks
+ * if parse_str is "10101010" (iow, "MMddhhmm" form)
+ * because we destroy year. Do these sscanf
+ * only if we saw a dash in parse_str.
+ */
+ /* yyyy-mm-dd HH */
+ && (sscanf(date_str, "%u-%u-%u %u%c", &ptm->tm_year,
+ &ptm->tm_mon, &ptm->tm_mday,
+ &ptm->tm_hour,
+ &end) >= 4
+ /* yyyy-mm-dd */
+ || sscanf(date_str, "%u-%u-%u%c", &ptm->tm_year,
+ &ptm->tm_mon, &ptm->tm_mday,
+ &end) >= 3
+ )
+ ) {
+ ptm->tm_year -= 1900; /* Adjust years */
+ ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
+ } else
+ if (date_str[0] == '@') {
+ time_t t = bb_strtol(date_str + 1, NULL, 10);
+ if (!errno) {
+ struct tm *lt = localtime(&t);
+ if (lt) {
+ *ptm = *lt;
+ return;
+ }
+ }
+ end = '1';
+ } 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
+ *
+ * "touch -t DATETIME" format: [[[[[YY]YY]MM]DD]hh]mm[.ss]
+ * Some, but not all, Unix "date DATETIME" commands
+ * move [[YY]YY] past minutes mm field (!).
+ * Coreutils date does it, and SUS mandates it.
+ * (date -s DATETIME does not support this format. lovely!)
+ * In bbox, this format is special-cased in date applet
+ * (IOW: this function assumes "touch -t" format).
+ */
+ unsigned cur_year = ptm->tm_year;
+ int len = strchrnul(date_str, '.') - date_str;
+
+ /* MM[.SS] */
+ if (len == 2 && sscanf(date_str, "%2u%2u%2u%2u""%2u%c" + 12,
+ &ptm->tm_min,
+ &end) >= 1) {
+ } else
+ /* HHMM[.SS] */
+ if (len == 4 && sscanf(date_str, "%2u%2u%2u""%2u%2u%c" + 9,
+ &ptm->tm_hour,
+ &ptm->tm_min,
+ &end) >= 2) {
+ } else
+ /* ddHHMM[.SS] */
+ if (len == 6 && sscanf(date_str, "%2u%2u""%2u%2u%2u%c" + 6,
+ &ptm->tm_mday,
+ &ptm->tm_hour,
+ &ptm->tm_min,
+ &end) >= 3) {
+ } else
+ /* mmddHHMM[.SS] */
+ if (len == 8 && sscanf(date_str, "%2u""%2u%2u%2u%2u%c" + 3,
+ &ptm->tm_mon,
+ &ptm->tm_mday,
+ &ptm->tm_hour,
+ &ptm->tm_min,
+ &end) >= 4) {
+ /* Adjust month from 1-12 to 0-11 */
+ ptm->tm_mon -= 1;
+ } else
+ /* yymmddHHMM[.SS] */
+ if (len == 10 && sscanf(date_str, "%2u%2u%2u%2u%2u%c",
+ &ptm->tm_year,
+ &ptm->tm_mon,
+ &ptm->tm_mday,
+ &ptm->tm_hour,
+ &ptm->tm_min,
+ &end) >= 5) {
+ /* Adjust month from 1-12 to 0-11 */
+ ptm->tm_mon -= 1;
+ if ((int)cur_year >= 50) { /* >= 1950 */
+ /* Adjust year: */
+ /* 1. Put it in the current century */
+ ptm->tm_year += (cur_year / 100) * 100;
+ /* 2. If too far in the past, +100 years */
+ if (ptm->tm_year < cur_year - 50)
+ ptm->tm_year += 100;
+ /* 3. If too far in the future, -100 years */
+ if (ptm->tm_year > cur_year + 50)
+ ptm->tm_year -= 100;
+ }
+ } else
+ /* ccyymmddHHMM[.SS] */
+ if (len == 12 && sscanf(date_str, "%4u%2u%2u%2u%2u%c",
+ &ptm->tm_year,
+ &ptm->tm_mon,
+ &ptm->tm_mday,
+ &ptm->tm_hour,
+ &ptm->tm_min,
+ &end) >= 5) {
+ ptm->tm_year -= 1900; /* Adjust years */
+ ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
+ } else {
+ err:
+ bb_error_msg_and_die(bb_msg_invalid_date, date_str);
+ }
+ ptm->tm_sec = 0; /* assume zero if [.SS] is not given */
+ if (end == '.') {
+ /* xxx.SS */
+ if (sscanf(strchr(date_str, '.') + 1, "%u%c",
+ &ptm->tm_sec, &end) == 1)
+ end = '\0';
+ /* else end != NUL and we error out */
+ }
+ /* Users were confused by "date -s 20180923"
+ * working (not in the way they were expecting).
+ * It was interpreted as MMDDhhmm, and not bothered by
+ * "month #20" in the least. Prevent such cases:
+ */
+ if (ptm->tm_sec > 60 /* allow "23:60" leap second */
+ || ptm->tm_min > 59
+ || ptm->tm_hour > 23
+ || ptm->tm_mday > 31
+ || ptm->tm_mon > 11 /* month# is 0..11, not 1..12 */
+ ) {
+ goto err;
+ }
+ }
+ 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 *ptm)
+{
+ time_t t = mktime(ptm);
+ if (t == (time_t) -1L) {
+ bb_error_msg_and_die(bb_msg_invalid_date, date_str);
+ }
+ return t;
+}
+
+static char* strftime_fmt(char *buf, unsigned len, time_t *tp, const char *fmt)
+{
+ time_t t;
+ if (!tp) {
+ tp = &t;
+ time(tp);
+ }
+ /* Returns pointer to NUL */
+ return buf + strftime(buf, len, fmt, localtime(tp));
+}
+
+char* FAST_FUNC strftime_HHMMSS(char *buf, unsigned len, time_t *tp)
+{
+ return strftime_fmt(buf, len, tp, "%H:%M:%S");
+}
+
+char* FAST_FUNC strftime_YYYYMMDDHHMMSS(char *buf, unsigned len, time_t *tp)
+{
+ return strftime_fmt(buf, len, tp, "%Y-%m-%d %H:%M:%S");
+}
+
#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 */
-unsigned long long monotonic_us(void)
+static void get_mono(struct timespec *ts)
+{
+ if (clock_gettime(CLOCK_MONOTONIC, ts))
+ bb_simple_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;
- if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts))
- bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
+ get_mono(&ts);
return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
}
+unsigned long long FAST_FUNC monotonic_ms(void)
+{
+ struct timespec ts;
+ get_mono(&ts);
+ return ts.tv_sec * 1000ULL + ts.tv_nsec/1000000;
+}
+unsigned FAST_FUNC monotonic_sec(void)
+{
+ struct timespec ts;
+ get_mono(&ts);
+ return ts.tv_sec;
+}
+
#else
-unsigned long long monotonic_us(void)
+
+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;
- if (gettimeofday(&tv, NULL))
- bb_error_msg_and_die("gettimeofday failed");
- return tv.tv_sec * 1000000ULL + tv_usec;
+ gettimeofday(&tv, NULL);
+ return tv.tv_sec * 1000000ULL + tv.tv_usec;
}
+unsigned long long FAST_FUNC monotonic_ms(void)
+{
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ return tv.tv_sec * 1000ULL + tv.tv_usec / 1000;
+}
+unsigned FAST_FUNC monotonic_sec(void)
+{
+ return time(NULL);
+}
+
#endif
projects / oweals / busybox.git / blobdiff