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 |
|
---|
11 | void 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 |
|
---|
163 | time_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 */
|
---|
183 | static 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 | }
|
---|
188 | unsigned 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 | }
|
---|
194 | unsigned 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 | }
|
---|
200 | unsigned 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 | }
|
---|
206 | unsigned FAST_FUNC monotonic_sec(void)
|
---|
207 | {
|
---|
208 | struct timespec ts;
|
---|
209 | get_mono(&ts);
|
---|
210 | return ts.tv_sec;
|
---|
211 | }
|
---|
212 |
|
---|
213 | #else
|
---|
214 |
|
---|
215 | unsigned 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 | }
|
---|
221 | unsigned 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 | }
|
---|
227 | unsigned 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 | }
|
---|
233 | unsigned FAST_FUNC monotonic_sec(void)
|
---|
234 | {
|
---|
235 | return time(NULL);
|
---|
236 | }
|
---|
237 |
|
---|
238 | #endif
|
---|