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comparison toys/posix/date.c @ 694:786841fdb1e0

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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style. The actual code should be the same afterward, this is just cosmetic refactoring.
author Rob Landley <rob@landley.net>
date Tue, 13 Nov 2012 17:14:08 -0600
parents 7e846e281e38
children 22f02dfb33ab
comparison
equal deleted inserted replaced
693:4a5a250e0633 694:786841fdb1e0
1 /* vi: set sw=4 ts=4: 1 /* date.c - set/get the date
2 *
3 * date.c - set/get the date
4 * 2 *
5 * Copyright 2012 Andre Renaud <andre@bluewatersys.com> 3 * Copyright 2012 Andre Renaud <andre@bluewatersys.com>
6 * 4 *
7 * See http://opengroup.org/onlinepubs/9699919799/utilities/date.html 5 * See http://opengroup.org/onlinepubs/9699919799/utilities/date.html
8 6
9 USE_DATE(NEWTOY(date, "r:u", TOYFLAG_BIN)) 7 USE_DATE(NEWTOY(date, "r:u", TOYFLAG_BIN))
10 8
11 config DATE 9 config DATE
12 bool "date" 10 bool "date"
13 default y 11 default y
14 help 12 help
15 usage: date [-u] [-r file] [+format] | mmddhhmm[[cc]yy] 13 usage: date [-u] [-r file] [+format] | mmddhhmm[[cc]yy]
16 14
17 Set/get the current date/time 15 Set/get the current date/time
18 */ 16 */
19 17
20 #define FOR_date 18 #define FOR_date
21 #include "toys.h" 19 #include "toys.h"
22 20
23 GLOBALS( 21 GLOBALS(
24 char *file; 22 char *file;
25 ) 23 )
26 24
27 void date_main(void) 25 void date_main(void)
28 { 26 {
29 const char *format_string = "%a %b %e %H:%M:%S %Z %Y"; 27 const char *format_string = "%a %b %e %H:%M:%S %Z %Y";
30 time_t now = time(NULL); 28 time_t now = time(NULL);
31 struct tm tm; 29 struct tm tm;
32 30
33 if (TT.file) { 31 if (TT.file) {
34 struct stat st; 32 struct stat st;
35 33
36 xstat(TT.file, &st); 34 xstat(TT.file, &st);
37 now = st.st_mtim.tv_sec; 35 now = st.st_mtim.tv_sec;
36 }
37 ((toys.optflags & FLAG_u) ? gmtime_r : localtime_r)(&now, &tm);
38
39 // Display the date?
40 if (!toys.optargs[0] || toys.optargs[0][0] == '+') {
41 if (toys.optargs[0]) format_string = toys.optargs[0]+1;
42 if (!strftime(toybuf, sizeof(toybuf), format_string, &tm))
43 perror_msg("bad format `%s'", format_string);
44
45 puts(toybuf);
46
47 // Set the date
48 } else {
49 struct timeval tv;
50 char *s = *toys.optargs;
51 int len = strlen(s);
52
53 if (len < 8 || len > 12 || (len & 1)) error_msg("bad date `%s'", s);
54
55 // Date format: mmddhhmm[[cc]yy]
56 memset(&tm, 0, sizeof(tm));
57 len = sscanf(s, "%2u%2u%2u%2u", &tm.tm_mon, &tm.tm_mday, &tm.tm_hour,
58 &tm.tm_min);
59 tm.tm_mon--;
60
61 // If year specified, overwrite one we fetched earlier
62 if (len > 8) {
63 sscanf(s, "%u", &tm.tm_year);
64 if (len == 12) tm.tm_year -= 1900;
65 /* 69-99 = 1969-1999, 0 - 68 = 2000-2068 */
66 else if (tm.tm_year < 69) tm.tm_year += 100;
38 } 67 }
39 ((toys.optflags & FLAG_u) ? gmtime_r : localtime_r)(&now, &tm);
40 68
41 // Display the date? 69 if (toys.optflags & FLAG_u) {
42 if (!toys.optargs[0] || toys.optargs[0][0] == '+') { 70 // Get the UTC version of a struct tm
43 if (toys.optargs[0]) format_string = toys.optargs[0]+1; 71 char *tz = CFG_TOYBOX_FREE ? getenv("TZ") : 0;
44 if (!strftime(toybuf, sizeof(toybuf), format_string, &tm)) 72 setenv("TZ", "UTC", 1);
45 perror_msg("bad format `%s'", format_string); 73 tzset();
74 tv.tv_sec = mktime(&tm);
75 if (CFG_TOYBOX_FREE) {
76 if (tz) setenv("TZ", tz, 1);
77 else unsetenv("TZ");
78 tzset();
79 }
80 } else tv.tv_sec = mktime(&tm);
46 81
47 puts(toybuf); 82 if (tv.tv_sec == (time_t)-1) error_msg("bad `%s'", toys.optargs[0]);
48 83 tv.tv_usec = 0;
49 // Set the date 84 if (!strftime(toybuf, sizeof(toybuf), format_string, &tm))
50 } else { 85 perror_msg("bad format `%s'", format_string);
51 struct timeval tv; 86 puts(toybuf);
52 char *s = *toys.optargs; 87 if (settimeofday(&tv, NULL) < 0) perror_msg("cannot set date");
53 int len = strlen(s); 88 }
54
55 if (len < 8 || len > 12 || (len & 1)) error_msg("bad date `%s'", s);
56
57 // Date format: mmddhhmm[[cc]yy]
58 memset(&tm, 0, sizeof(tm));
59 len = sscanf(s, "%2u%2u%2u%2u", &tm.tm_mon, &tm.tm_mday, &tm.tm_hour,
60 &tm.tm_min);
61 tm.tm_mon--;
62
63 // If year specified, overwrite one we fetched earlier
64 if (len > 8) {
65 sscanf(s, "%u", &tm.tm_year);
66 if (len == 12) tm.tm_year -= 1900;
67 /* 69-99 = 1969-1999, 0 - 68 = 2000-2068 */
68 else if (tm.tm_year < 69) tm.tm_year += 100;
69 }
70
71 if (toys.optflags & FLAG_u) {
72 // Get the UTC version of a struct tm
73 char *tz = CFG_TOYBOX_FREE ? getenv("TZ") : 0;
74 setenv("TZ", "UTC", 1);
75 tzset();
76 tv.tv_sec = mktime(&tm);
77 if (CFG_TOYBOX_FREE) {
78 if (tz) setenv("TZ", tz, 1);
79 else unsetenv("TZ");
80 tzset();
81 }
82 } else tv.tv_sec = mktime(&tm);
83
84 if (tv.tv_sec == (time_t)-1) error_msg("bad `%s'", toys.optargs[0]);
85 tv.tv_usec = 0;
86 if (!strftime(toybuf, sizeof(toybuf), format_string, &tm))
87 perror_msg("bad format `%s'", format_string);
88 puts(toybuf);
89 if (settimeofday(&tv, NULL) < 0) perror_msg("cannot set date");
90 }
91 } 89 }