Commit | Line | Data |
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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" | |
212b6f5d | 8 | #include "strerr.h" |
2117e02e MW |
9 | #include "substdio.h" |
10 | #include "subfd.h" | |
11 | #include "readwrite.h" | |
12 | #include "exit.h" | |
13 | ||
212b6f5d MW |
14 | #define FATAL "predate: fatal: " |
15 | ||
2117e02e MW |
16 | static char *montab[12] = { |
17 | "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec" | |
18 | }; | |
19 | ||
20 | char num[FMT_ULONG]; | |
21 | char outbuf[1024]; | |
22 | ||
23 | void main(argc,argv) | |
24 | int argc; | |
25 | char **argv; | |
26 | { | |
27 | time_t now; | |
28 | struct tm *tm; | |
29 | struct datetime dt; | |
30 | datetime_sec utc; | |
31 | datetime_sec local; | |
32 | int minutes; | |
33 | int pi[2]; | |
34 | substdio ss; | |
35 | int wstat; | |
36 | int pid; | |
37 | ||
38 | sig_pipeignore(); | |
39 | ||
212b6f5d MW |
40 | if (!argv[1]) |
41 | strerr_die1x(100,"predate: usage: predate child"); | |
2117e02e | 42 | |
212b6f5d MW |
43 | if (pipe(pi) == -1) |
44 | strerr_die2sys(111,FATAL,"unable to create pipe: "); | |
2117e02e MW |
45 | |
46 | switch(pid = fork()) { | |
47 | case -1: | |
212b6f5d | 48 | strerr_die2sys(111,FATAL,"unable to fork: "); |
2117e02e MW |
49 | case 0: |
50 | close(pi[1]); | |
212b6f5d MW |
51 | if (fd_move(0,pi[0]) == -1) |
52 | strerr_die2sys(111,FATAL,"unable to set up fds: "); | |
2117e02e MW |
53 | sig_pipedefault(); |
54 | execvp(argv[1],argv + 1); | |
212b6f5d | 55 | strerr_die4sys(111,FATAL,"unable to run ",argv[1],": "); |
2117e02e MW |
56 | } |
57 | close(pi[0]); | |
58 | substdio_fdbuf(&ss,write,pi[1],outbuf,sizeof(outbuf)); | |
59 | ||
60 | time(&now); | |
61 | ||
62 | tm = gmtime(&now); | |
63 | dt.year = tm->tm_year; | |
64 | dt.mon = tm->tm_mon; | |
65 | dt.mday = tm->tm_mday; | |
66 | dt.hour = tm->tm_hour; | |
67 | dt.min = tm->tm_min; | |
68 | dt.sec = tm->tm_sec; | |
69 | utc = datetime_untai(&dt); /* utc == now, if gmtime ignores leap seconds */ | |
70 | ||
71 | tm = localtime(&now); | |
72 | dt.year = tm->tm_year; | |
73 | dt.mon = tm->tm_mon; | |
74 | dt.mday = tm->tm_mday; | |
75 | dt.hour = tm->tm_hour; | |
76 | dt.min = tm->tm_min; | |
77 | dt.sec = tm->tm_sec; | |
78 | local = datetime_untai(&dt); | |
79 | ||
80 | substdio_puts(&ss,"Date: "); | |
81 | substdio_put(&ss,num,fmt_uint(num,dt.mday)); | |
82 | substdio_puts(&ss," "); | |
83 | substdio_puts(&ss,montab[dt.mon]); | |
84 | substdio_puts(&ss," "); | |
85 | substdio_put(&ss,num,fmt_uint(num,dt.year + 1900)); | |
86 | substdio_puts(&ss," "); | |
87 | substdio_put(&ss,num,fmt_uint0(num,dt.hour,2)); | |
88 | substdio_puts(&ss,":"); | |
89 | substdio_put(&ss,num,fmt_uint0(num,dt.min,2)); | |
90 | substdio_puts(&ss,":"); | |
91 | substdio_put(&ss,num,fmt_uint0(num,dt.sec,2)); | |
92 | ||
93 | if (local < utc) { | |
94 | minutes = (utc - local + 30) / 60; | |
95 | substdio_puts(&ss," -"); | |
96 | substdio_put(&ss,num,fmt_uint0(num,minutes / 60,2)); | |
97 | substdio_put(&ss,num,fmt_uint0(num,minutes % 60,2)); | |
98 | } | |
99 | else { | |
100 | minutes = (local - utc + 30) / 60; | |
101 | substdio_puts(&ss," +"); | |
102 | substdio_put(&ss,num,fmt_uint0(num,minutes / 60,2)); | |
103 | substdio_put(&ss,num,fmt_uint0(num,minutes % 60,2)); | |
104 | } | |
105 | ||
106 | substdio_puts(&ss,"\n"); | |
107 | substdio_copy(&ss,subfdin); | |
108 | substdio_flush(&ss); | |
109 | close(pi[1]); | |
110 | ||
212b6f5d MW |
111 | if (wait_pid(&wstat,pid) == -1) |
112 | strerr_die2sys(111,FATAL,"wait failed: "); | |
113 | if (wait_crashed(wstat)) | |
114 | strerr_die2x(111,FATAL,"child crashed"); | |
2117e02e MW |
115 | _exit(wait_exitcode(wstat)); |
116 | } |