1#include <stdio.h>
2#include <stdlib.h>
3#include <unistd.h>
4#include <fcntl.h>
5#include <string.h>
6#include <errno.h>
7#include <time.h>
8#include <linux/android_alarm.h>
9#include <sys/ioctl.h>
10
11static void settime(char *s) {
12    struct tm tm;
13    int day = atoi(s);
14    int hour;
15    time_t t;
16    int fd;
17    struct timespec ts;
18
19    while (*s && *s != '.')
20        s++;
21
22    if (*s)
23        s++;
24
25    hour = atoi(s);
26
27    tm.tm_year = day / 10000 - 1900;
28    tm.tm_mon = (day % 10000) / 100 - 1;
29    tm.tm_mday = (day % 100);
30    tm.tm_hour = hour / 10000;
31    tm.tm_min = (hour % 10000) / 100;
32    tm.tm_sec = (hour % 100);
33    tm.tm_isdst = -1;
34
35    t = mktime(&tm);
36
37    fd = open("/dev/alarm", O_RDWR);
38    ts.tv_sec = t;
39    ts.tv_nsec = 0;
40    ioctl(fd, ANDROID_ALARM_SET_RTC, &ts);
41}
42
43int date_main(int argc, char *argv[])
44{
45	int c;
46    int res;
47	struct tm tm;
48	time_t t;
49	struct timeval tv;
50    struct timespec ts;
51	char strbuf[260];
52    int fd;
53
54    int useutc = 0;
55
56    tzset();
57
58    do {
59        c = getopt(argc, argv, "us:");
60        if (c == EOF)
61            break;
62        switch (c) {
63        case 'u':
64            useutc = 1;
65            break;
66        case 's':
67            settime(optarg);
68            break;
69        case '?':
70            fprintf(stderr, "%s: invalid option -%c\n",
71                argv[0], optopt);
72            exit(1);
73        }
74    } while (1);
75    if(optind + 2 < argc) {
76        fprintf(stderr,"%s [-u] [date]\n", argv[0]);
77        return 1;
78    }
79
80    int hasfmt = argc == optind + 1 && argv[optind][0] == '+';
81    if(optind == argc || hasfmt) {
82        char buf[2000];
83        time(&t);
84        if (useutc) {
85            gmtime_r(&t, &tm);
86            strftime(strbuf, sizeof(strbuf),
87                     (hasfmt ? argv[optind] + 1 : "%a %b %e %H:%M:%S GMT %Y"),
88                     &tm);
89        } else {
90            localtime_r(&t, &tm);
91            strftime(strbuf, sizeof(strbuf),
92                     (hasfmt ? argv[optind] + 1 : "%a %b %e %H:%M:%S %Z %Y"),
93                     &tm);
94        }
95        printf("%s\n", strbuf);
96    }
97    else if(optind + 1 == argc) {
98#if 0
99        struct tm *tmptr;
100        tmptr = getdate(argv[optind]);
101        if(tmptr == NULL) {
102            fprintf(stderr,"getdate_r failed\n");
103            return 1;
104        }
105        tm = *tmptr;
106#if 0
107        if(getdate_r(argv[optind], &tm) < 0) {
108            fprintf(stderr,"getdate_r failed %s\n", strerror(errno));
109            return 1;
110        }
111#endif
112#endif
113        //strptime(argv[optind], NULL, &tm);
114        //tv.tv_sec = mktime(&tm);
115        //tv.tv_usec = 0;
116        strtotimeval(argv[optind], &tv);
117        printf("time %s -> %d.%d\n", argv[optind], tv.tv_sec, tv.tv_usec);
118        fd = open("/dev/alarm", O_RDWR);
119        ts.tv_sec = tv.tv_sec;
120        ts.tv_nsec = tv.tv_usec * 1000;
121        res = ioctl(fd, ANDROID_ALARM_SET_RTC, &ts);
122        //res = settimeofday(&tv, NULL);
123        if(res < 0) {
124            fprintf(stderr,"settimeofday failed %s\n", strerror(errno));
125            return 1;
126        }
127    }
128    else {
129        fprintf(stderr,"%s [-s 20070325.123456] [-u] [date]\n", argv[0]);
130        return 1;
131    }
132
133    return 0;
134}
135