source: MondoRescue/branches/3.0/mindi-busybox/libbb/time.c@ 2899

Last change on this file since 2899 was 2725, checked in by Bruno Cornec, 13 years ago
  • Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3
  • Property svn:eol-style set to native
File size: 5.9 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Utility routines.
4 *
5 * Copyright (C) 2007 Denys Vlasenko
6 *
7 * Licensed under GPLv2, see file LICENSE in this source tree.
8 */
9#include "libbb.h"
10
11void FAST_FUNC parse_datestr(const char *date_str, struct tm *ptm)
12{
13 char end = '\0';
14 const char *last_colon = strrchr(date_str, ':');
15
16 if (last_colon != NULL) {
17 /* Parse input and assign appropriately to ptm */
18#if ENABLE_DESKTOP
19 const char *endp;
20#endif
21
22 /* HH:MM */
23 if (sscanf(date_str, "%u:%u%c",
24 &ptm->tm_hour,
25 &ptm->tm_min,
26 &end) >= 2) {
27 /* no adjustments needed */
28 } else
29 /* mm.dd-HH:MM */
30 if (sscanf(date_str, "%u.%u-%u:%u%c",
31 &ptm->tm_mon, &ptm->tm_mday,
32 &ptm->tm_hour, &ptm->tm_min,
33 &end) >= 4) {
34 /* Adjust month from 1-12 to 0-11 */
35 ptm->tm_mon -= 1;
36 } else
37 /* yyyy.mm.dd-HH:MM */
38 if (sscanf(date_str, "%u.%u.%u-%u:%u%c", &ptm->tm_year,
39 &ptm->tm_mon, &ptm->tm_mday,
40 &ptm->tm_hour, &ptm->tm_min,
41 &end) >= 5) {
42 ptm->tm_year -= 1900; /* Adjust years */
43 ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
44 } else
45 /* yyyy-mm-dd HH:MM */
46 if (sscanf(date_str, "%u-%u-%u %u:%u%c", &ptm->tm_year,
47 &ptm->tm_mon, &ptm->tm_mday,
48 &ptm->tm_hour, &ptm->tm_min,
49 &end) >= 5) {
50 ptm->tm_year -= 1900; /* Adjust years */
51 ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
52 } else
53#if ENABLE_DESKTOP /* strptime is BIG: ~1k in uclibc, ~10k in glibc */
54 /* month_name d HH:MM:SS YYYY. Supported by GNU date */
55 if ((endp = strptime(date_str, "%b %d %T %Y", ptm)) != NULL
56 && *endp == '\0'
57 ) {
58 return; /* don't fall through to end == ":" check */
59 } else
60#endif
61//TODO: coreutils 6.9 also accepts "yyyy-mm-dd HH" (no minutes)
62 {
63 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
64 }
65 if (end == ':') {
66 /* xxx:SS */
67 if (sscanf(last_colon + 1, "%u%c", &ptm->tm_sec, &end) == 1)
68 end = '\0';
69 /* else end != NUL and we error out */
70 }
71 } else if (date_str[0] == '@') {
72 time_t t = bb_strtol(date_str + 1, NULL, 10);
73 if (!errno) {
74 struct tm *lt = localtime(&t);
75 if (lt) {
76 *ptm = *lt;
77 return;
78 }
79 }
80 end = '1';
81 } else {
82 /* Googled the following on an old date manpage:
83 *
84 * The canonical representation for setting the date/time is:
85 * cc Century (either 19 or 20)
86 * yy Year in abbreviated form (e.g. 89, 06)
87 * mm Numeric month, a number from 1 to 12
88 * dd Day, a number from 1 to 31
89 * HH Hour, a number from 0 to 23
90 * MM Minutes, a number from 0 to 59
91 * .SS Seconds, a number from 0 to 61 (with leap seconds)
92 * Everything but the minutes is optional
93 *
94 * This coincides with the format of "touch -t TIME"
95 */
96 int len = strchrnul(date_str, '.') - date_str;
97
98 /* MM[.SS] */
99 if (len == 2 && sscanf(date_str, "%2u%2u%2u%2u""%2u%c" + 12,
100 &ptm->tm_min,
101 &end) >= 1) {
102 } else
103 /* HHMM[.SS] */
104 if (len == 4 && sscanf(date_str, "%2u%2u%2u""%2u%2u%c" + 9,
105 &ptm->tm_hour,
106 &ptm->tm_min,
107 &end) >= 2) {
108 } else
109 /* ddHHMM[.SS] */
110 if (len == 6 && sscanf(date_str, "%2u%2u""%2u%2u%2u%c" + 6,
111 &ptm->tm_mday,
112 &ptm->tm_hour,
113 &ptm->tm_min,
114 &end) >= 3) {
115 } else
116 /* mmddHHMM[.SS] */
117 if (len == 8 && sscanf(date_str, "%2u""%2u%2u%2u%2u%c" + 3,
118 &ptm->tm_mon,
119 &ptm->tm_mday,
120 &ptm->tm_hour,
121 &ptm->tm_min,
122 &end) >= 4) {
123 /* Adjust month from 1-12 to 0-11 */
124 ptm->tm_mon -= 1;
125 } else
126 /* yymmddHHMM[.SS] */
127 if (len == 10 && sscanf(date_str, "%2u%2u%2u%2u%2u%c",
128 &ptm->tm_year,
129 &ptm->tm_mon,
130 &ptm->tm_mday,
131 &ptm->tm_hour,
132 &ptm->tm_min,
133 &end) >= 5) {
134 /* Adjust month from 1-12 to 0-11 */
135 ptm->tm_mon -= 1;
136 } else
137 /* ccyymmddHHMM[.SS] */
138 if (len == 12 && sscanf(date_str, "%4u%2u%2u%2u%2u%c",
139 &ptm->tm_year,
140 &ptm->tm_mon,
141 &ptm->tm_mday,
142 &ptm->tm_hour,
143 &ptm->tm_min,
144 &end) >= 5) {
145 ptm->tm_year -= 1900; /* Adjust years */
146 ptm->tm_mon -= 1; /* Adjust month from 1-12 to 0-11 */
147 } else {
148 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
149 }
150 if (end == '.') {
151 /* xxx.SS */
152 if (sscanf(strchr(date_str, '.') + 1, "%u%c",
153 &ptm->tm_sec, &end) == 1)
154 end = '\0';
155 /* else end != NUL and we error out */
156 }
157 }
158 if (end != '\0') {
159 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
160 }
161}
162
163time_t FAST_FUNC validate_tm_time(const char *date_str, struct tm *ptm)
164{
165 time_t t = mktime(ptm);
166 if (t == (time_t) -1L) {
167 bb_error_msg_and_die(bb_msg_invalid_date, date_str);
168 }
169 return t;
170}
171
172#if ENABLE_MONOTONIC_SYSCALL
173
174#include <sys/syscall.h>
175/* Old glibc (< 2.3.4) does not provide this constant. We use syscall
176 * directly so this definition is safe. */
177#ifndef CLOCK_MONOTONIC
178#define CLOCK_MONOTONIC 1
179#endif
180
181/* libc has incredibly messy way of doing this,
182 * typically requiring -lrt. We just skip all this mess */
183static void get_mono(struct timespec *ts)
184{
185 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts))
186 bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
187}
188unsigned long long FAST_FUNC monotonic_ns(void)
189{
190 struct timespec ts;
191 get_mono(&ts);
192 return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
193}
194unsigned long long FAST_FUNC monotonic_us(void)
195{
196 struct timespec ts;
197 get_mono(&ts);
198 return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
199}
200unsigned long long FAST_FUNC monotonic_ms(void)
201{
202 struct timespec ts;
203 get_mono(&ts);
204 return ts.tv_sec * 1000ULL + ts.tv_nsec/1000000;
205}
206unsigned FAST_FUNC monotonic_sec(void)
207{
208 struct timespec ts;
209 get_mono(&ts);
210 return ts.tv_sec;
211}
212
213#else
214
215unsigned long long FAST_FUNC monotonic_ns(void)
216{
217 struct timeval tv;
218 gettimeofday(&tv, NULL);
219 return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
220}
221unsigned long long FAST_FUNC monotonic_us(void)
222{
223 struct timeval tv;
224 gettimeofday(&tv, NULL);
225 return tv.tv_sec * 1000000ULL + tv.tv_usec;
226}
227unsigned long long FAST_FUNC monotonic_ms(void)
228{
229 struct timeval tv;
230 gettimeofday(&tv, NULL);
231 return tv.tv_sec * 1000ULL + tv.tv_usec / 1000;
232}
233unsigned FAST_FUNC monotonic_sec(void)
234{
235 return time(NULL);
236}
237
238#endif
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