Commit | Line | Data |
---|---|---|
2117e02e MW |
1 | #include <sys/types.h> |
2 | #include <time.h> | |
3 | #include "datetime.h" | |
4 | #include "fork.h" | |
5 | #include "wait.h" | |
6 | #include "fd.h" | |
7 | #include "fmt.h" | |
8 | #include "substdio.h" | |
9 | #include "subfd.h" | |
10 | #include "readwrite.h" | |
11 | #include "exit.h" | |
12 | ||
13 | static char *montab[12] = { | |
14 | "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec" | |
15 | }; | |
16 | ||
17 | char num[FMT_ULONG]; | |
18 | char outbuf[1024]; | |
19 | ||
20 | void main(argc,argv) | |
21 | int argc; | |
22 | char **argv; | |
23 | { | |
24 | time_t now; | |
25 | struct tm *tm; | |
26 | struct datetime dt; | |
27 | datetime_sec utc; | |
28 | datetime_sec local; | |
29 | int minutes; | |
30 | int pi[2]; | |
31 | substdio ss; | |
32 | int wstat; | |
33 | int pid; | |
34 | ||
35 | sig_pipeignore(); | |
36 | ||
37 | if (!argv[1]) { | |
38 | substdio_putsflush(subfderr,"predate: usage: predate child\n"); | |
39 | _exit(100); | |
40 | } | |
41 | ||
42 | if (pipe(pi) == -1) { | |
43 | substdio_putsflush(subfderr,"predate: fatal: unable to create pipe\n"); | |
44 | _exit(111); | |
45 | } | |
46 | ||
47 | switch(pid = fork()) { | |
48 | case -1: | |
49 | substdio_putsflush(subfderr,"predate: fatal: unable to fork\n"); | |
50 | _exit(111); | |
51 | case 0: | |
52 | close(pi[1]); | |
53 | if (fd_move(0,pi[0]) == -1) { | |
54 | substdio_putsflush(subfderr,"predate: fatal: unable to set up fds\n"); | |
55 | _exit(111); | |
56 | } | |
57 | sig_pipedefault(); | |
58 | execvp(argv[1],argv + 1); | |
59 | substdio_putsflush(subfderr,"predate: fatal: unable to exec\n"); | |
60 | _exit(111); | |
61 | } | |
62 | close(pi[0]); | |
63 | substdio_fdbuf(&ss,write,pi[1],outbuf,sizeof(outbuf)); | |
64 | ||
65 | time(&now); | |
66 | ||
67 | tm = gmtime(&now); | |
68 | dt.year = tm->tm_year; | |
69 | dt.mon = tm->tm_mon; | |
70 | dt.mday = tm->tm_mday; | |
71 | dt.hour = tm->tm_hour; | |
72 | dt.min = tm->tm_min; | |
73 | dt.sec = tm->tm_sec; | |
74 | utc = datetime_untai(&dt); /* utc == now, if gmtime ignores leap seconds */ | |
75 | ||
76 | tm = localtime(&now); | |
77 | dt.year = tm->tm_year; | |
78 | dt.mon = tm->tm_mon; | |
79 | dt.mday = tm->tm_mday; | |
80 | dt.hour = tm->tm_hour; | |
81 | dt.min = tm->tm_min; | |
82 | dt.sec = tm->tm_sec; | |
83 | local = datetime_untai(&dt); | |
84 | ||
85 | substdio_puts(&ss,"Date: "); | |
86 | substdio_put(&ss,num,fmt_uint(num,dt.mday)); | |
87 | substdio_puts(&ss," "); | |
88 | substdio_puts(&ss,montab[dt.mon]); | |
89 | substdio_puts(&ss," "); | |
90 | substdio_put(&ss,num,fmt_uint(num,dt.year + 1900)); | |
91 | substdio_puts(&ss," "); | |
92 | substdio_put(&ss,num,fmt_uint0(num,dt.hour,2)); | |
93 | substdio_puts(&ss,":"); | |
94 | substdio_put(&ss,num,fmt_uint0(num,dt.min,2)); | |
95 | substdio_puts(&ss,":"); | |
96 | substdio_put(&ss,num,fmt_uint0(num,dt.sec,2)); | |
97 | ||
98 | if (local < utc) { | |
99 | minutes = (utc - local + 30) / 60; | |
100 | substdio_puts(&ss," -"); | |
101 | substdio_put(&ss,num,fmt_uint0(num,minutes / 60,2)); | |
102 | substdio_put(&ss,num,fmt_uint0(num,minutes % 60,2)); | |
103 | } | |
104 | else { | |
105 | minutes = (local - utc + 30) / 60; | |
106 | substdio_puts(&ss," +"); | |
107 | substdio_put(&ss,num,fmt_uint0(num,minutes / 60,2)); | |
108 | substdio_put(&ss,num,fmt_uint0(num,minutes % 60,2)); | |
109 | } | |
110 | ||
111 | substdio_puts(&ss,"\n"); | |
112 | substdio_copy(&ss,subfdin); | |
113 | substdio_flush(&ss); | |
114 | close(pi[1]); | |
115 | ||
116 | if (wait_pid(&wstat,pid) == -1) { | |
117 | substdio_putsflush(subfderr,"predate: fatal: wait failed\n"); | |
118 | _exit(111); | |
119 | } | |
120 | if (wait_crashed(wstat)) { | |
121 | substdio_putsflush(subfderr,"predate: fatal: child crashed\n"); | |
122 | _exit(111); | |
123 | } | |
124 | _exit(wait_exitcode(wstat)); | |
125 | } |