Diff of /trunk/mkinitrd-magellan/busybox/coreutils/date.c

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	revision 1122 by niro, Sun May 30 11:32:42 2010 UTC	revision 1123 by niro, Wed Aug 18 21:56:57 2010 UTC
#	Line 51	Line 51
51	*    and does not support -Ins	*    and does not support -Ins
52	* -D FMT is a bbox extension for _input_ conversion of -d DATE	* -D FMT is a bbox extension for _input_ conversion of -d DATE
53	*/	*/
54
55		//kbuild:lib-$(CONFIG_DATE) += date.o
56
57		//config:config DATE
58		//config: bool "date"
59		//config: default y
60		//config: help
61		//config:  date is used to set the system date or display the
62		//config:  current time in the given format.
63		//config:
64		//config:config FEATURE_DATE_ISOFMT
65		//config: bool "Enable ISO date format output (-I)"
66		//config: default y
67		//config: depends on DATE
68		//config: help
69		//config:  Enable option (-I) to output an ISO-8601 compliant
70		//config:  date/time string.
71		//config:
72		//config:config FEATURE_DATE_NANO
73		//config: bool "Support %[num]N nanosecond format specifier"
74		//config: default n
75		//config: depends on DATE
76		//config: help
77		//config:  Support %[num]N format specifier. Adds ~250 bytes of code.
78		//config:
79		//config:config FEATURE_DATE_COMPAT
80		//config: bool "Support weird 'date MMDDhhmm[[YY]YY][.ss]' format"
81		//config: default y
82		//config: depends on DATE
83		//config: help
84		//config:  System time can be set by 'date -s DATE' and simply 'date DATE',
85		//config:  but formats of DATE string are different. 'date DATE' accepts
86		//config:  a rather weird MMDDhhmm[[YY]YY][.ss] format with completely
87		//config:  unnatural placement of year between minutes and seconds.
88		//config:  date -s (and other commands like touch -d) use more sensible
89		//config:  formats (for one, ISO format YYYY-MM-DD hh:mm:ss.ssssss).
90		//config:
91		//config:  With this option off, 'date DATE' is 'date -s DATE' support
92		//config:  the same format. With it on, 'date DATE' additionally supports
93		//config:  MMDDhhmm[[YY]YY][.ss] format.
94
95	#include "libbb.h"	#include "libbb.h"
96		#if ENABLE_FEATURE_DATE_NANO
97		# include <sys/syscall.h>
98		#endif
99
100	enum {	enum {
101	OPT_RFC2822   = (1 << 0), /* R */	OPT_RFC2822   = (1 << 0), /* R */
#	Line 84  static const char date_longopts[] ALIGN1	Line 128  static const char date_longopts[] ALIGN1
128	int date_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;	int date_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
129	int date_main(int argc UNUSED_PARAM, char **argv)	int date_main(int argc UNUSED_PARAM, char **argv)
130	{	{
131		struct timespec ts;
132	struct tm tm_time;	struct tm tm_time;
133	char buf_fmt_dt2str[64];	char buf_fmt_dt2str[64];
	time_t tm;
134	unsigned opt;	unsigned opt;
135	int ifmt = -1;	int ifmt = -1;
136	char *date_str;	char *date_str;
#	Line 161  int date_main(int argc UNUSED_PARAM, cha	Line 205  int date_main(int argc UNUSED_PARAM, cha
205	if (opt & OPT_REFERENCE) {	if (opt & OPT_REFERENCE) {
206	struct stat statbuf;	struct stat statbuf;
207	xstat(filename, &statbuf);	xstat(filename, &statbuf);
208	tm = statbuf.st_mtime;	ts.tv_sec = statbuf.st_mtime;
209		#if ENABLE_FEATURE_DATE_NANO
210		ts.tv_nsec = statbuf.st_mtim.tv_nsec;
211		#endif
212	} else {	} else {
213	time(&tm);	#if ENABLE_FEATURE_DATE_NANO
214		/* libc has incredibly messy way of doing this,
215		* typically requiring -lrt. We just skip all this mess */
216		syscall(__NR_clock_gettime, CLOCK_REALTIME, &ts);
217		#else
218		time(&ts.tv_sec);
219		#endif
220	}	}
221	localtime_r(&tm, &tm_time);	localtime_r(&ts.tv_sec, &tm_time);
222
223	/* If date string is given, update tm_time, and maybe set date */	/* If date string is given, update tm_time, and maybe set date */
224	if (date_str != NULL) {	if (date_str != NULL) {
#	Line 184  int date_main(int argc UNUSED_PARAM, cha	Line 237  int date_main(int argc UNUSED_PARAM, cha
237
238	/* Correct any day of week and day of year etc. fields */	/* Correct any day of week and day of year etc. fields */
239	tm_time.tm_isdst = -1; /* Be sure to recheck dst */	tm_time.tm_isdst = -1; /* Be sure to recheck dst */
240	tm = validate_tm_time(date_str, &tm_time);	ts.tv_sec = validate_tm_time(date_str, &tm_time);
241
242	maybe_set_utc(opt);	maybe_set_utc(opt);
243
244	/* if setting time, set it */	/* if setting time, set it */
245	if ((opt & OPT_SET) && stime(&tm) < 0) {	if ((opt & OPT_SET) && stime(&ts.tv_sec) < 0) {
246	bb_perror_msg("can't set date");	bb_perror_msg("can't set date");
247	}	}
248	}	}
#	Line 222  int date_main(int argc UNUSED_PARAM, cha	Line 275  int date_main(int argc UNUSED_PARAM, cha
275	fmt_dt2str = (char*)"%a %b %e %H:%M:%S %Z %Y";	fmt_dt2str = (char*)"%a %b %e %H:%M:%S %Z %Y";
276	}	}
277	}	}
278		#if ENABLE_FEATURE_DATE_NANO
279		else {
280		/* User-specified fmt_dt2str */
281		/* Search for and process "%N" */
282		char *p = fmt_dt2str;
283		while ((p = strchr(p, '%')) != NULL) {
284		int n, m;
285		unsigned pres, scale;
286
287		p++;
288		if (*p == '%') {
289		p++;
290		continue;
291		}
292		n = strspn(p, "0123456789");
293		if (p[n] != 'N') {
294		p += n;
295		continue;
296		}
297		/* We have "%[nnn]N" */
298		p[-1] = '\0';
299		p[n] = '\0';
300		scale = 1;
301		pres = 9;
302		if (n) {
303		pres = xatoi_u(p);
304		if (pres == 0)
305		pres = 9;
306		m = 9 - pres;
307		while (--m >= 0)
308		scale *= 10;
309		}
310
311		m = p - fmt_dt2str;
312		p += n + 1;
313		fmt_dt2str = xasprintf("%s%0*u%s", fmt_dt2str, pres, (unsigned)ts.tv_nsec / scale, p);
314		p = fmt_dt2str + m;
315		}
316		}
317		#endif
318
319	#define date_buf bb_common_bufsiz1	#define date_buf bb_common_bufsiz1
320	if (*fmt_dt2str == '\0') {	if (*fmt_dt2str == '\0') {

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Legend: Removed from v.1122   changed lines   Added in v.1123