Contents of /trunk/mkinitrd-magellan/busybox/libbb/time.c
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Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
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Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
File MIME type: text/plain
File size: 6080 byte(s)
-updated to busybox-1.17.1
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Utility routines. |
4 | * |
5 | * Copyright (C) 2007 Denys Vlasenko |
6 | * |
7 | * Licensed under GPL version 2, see file LICENSE in this tarball for details. |
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 |