date: factor out date parsing (in preparation for touch -d)
function old new delta
parse_datestr - 391 +391
sha512_process_block128 1283 1310 +27
buffer_fill_and_print 179 196 +17
nexpr 826 840 +14
unzip_main 1931 1939 +8
popstring 134 140 +6
qrealloc 33 36 +3
builtin_umask 121 123 +2
evalvar 1365 1363 -2
changepath 194 192 -2
do_compress 1698 1688 -10
hwclock_main 340 329 -11
cmdputs 414 402 -12
identify 4343 4329 -14
date_main 1186 687 -499
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 7/7 up/down: 468/-550) Total: -82 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/coreutils/date.c b/coreutils/date.c
index 3a536db..7f2a5b3 100644
--- a/coreutils/date.c
+++ b/coreutils/date.c
@@ -10,8 +10,6 @@
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include "libbb.h"
-
/* This 'date' command supports only 2 time setting formats,
all the GNU strftime stuff (its in libc, lets use it),
setting time using UTC and displaying it, as well as
@@ -23,18 +21,51 @@
/* Default input handling to save surprising some people */
+/* GNU coreutils 6.9 man page:
+ * date [OPTION]... [+FORMAT]
+ * date [-u|--utc|--universal] [MMDDhhmm[[CC]YY][.ss]]
+ * -d, --date=STRING
+ * display time described by STRING, not `now'
+ * -f, --file=DATEFILE
+ * like --date once for each line of DATEFILE
+ * -r, --reference=FILE
+ * display the last modification time of FILE
+ * -R, --rfc-2822
+ * output date and time in RFC 2822 format.
+ * Example: Mon, 07 Aug 2006 12:34:56 -0600
+ * --rfc-3339=TIMESPEC
+ * output date and time in RFC 3339 format.
+ * TIMESPEC='date', 'seconds', or 'ns'
+ * Date and time components are separated by a single space:
+ * 2006-08-07 12:34:56-06:00
+ * -s, --set=STRING
+ * set time described by STRING
+ * -u, --utc, --universal
+ * print or set Coordinated Universal Time
+ *
+ * Busybox:
+ * long options are not supported
+ * -f is not supported
+ * -I seems to roughly match --rfc-3339, but -I has _optional_ param
+ * (thus "-I seconds" doesn't work, only "-Iseconds"),
+ * and does not support -Ins
+ * -D FMT is a bbox extension for _input_ conversion of -d DATE
+ */
+#include "libbb.h"
-#define DATE_OPT_RFC2822 0x01
-#define DATE_OPT_SET 0x02
-#define DATE_OPT_UTC 0x04
-#define DATE_OPT_DATE 0x08
-#define DATE_OPT_REFERENCE 0x10
-#define DATE_OPT_TIMESPEC 0x20
-#define DATE_OPT_HINT 0x40
+enum {
+ OPT_RFC2822 = (1 << 0), /* R */
+ OPT_SET = (1 << 1), /* s */
+ OPT_UTC = (1 << 2), /* u */
+ OPT_DATE = (1 << 3), /* d */
+ OPT_REFERENCE = (1 << 4), /* r */
+ OPT_TIMESPEC = (1 << 5) * ENABLE_FEATURE_DATE_ISOFMT, /* I */
+ OPT_HINT = (1 << 6) * ENABLE_FEATURE_DATE_ISOFMT, /* D */
+};
static void maybe_set_utc(int opt)
{
- if (opt & DATE_OPT_UTC)
+ if (opt & OPT_UTC)
putenv((char*)"TZ=UTC0");
}
@@ -60,7 +91,7 @@
argv += optind;
maybe_set_utc(opt);
- if (ENABLE_FEATURE_DATE_ISOFMT && (opt & DATE_OPT_TIMESPEC)) {
+ if (ENABLE_FEATURE_DATE_ISOFMT && (opt & OPT_TIMESPEC)) {
ifmt = 0; /* default is date */
if (isofmt_arg) {
static const char isoformats[] ALIGN1 =
@@ -76,8 +107,8 @@
fmt_dt2str = &argv[0][1]; /* Skip over the '+' */
argv++;
}
- if (!(opt & (DATE_OPT_SET | DATE_OPT_DATE))) {
- opt |= DATE_OPT_SET;
+ if (!(opt & (OPT_SET | OPT_DATE))) {
+ opt |= OPT_SET;
date_str = argv[0]; /* can be NULL */
if (date_str)
argv++;
@@ -88,13 +119,14 @@
/* Now we have parsed all the information except the date format
which depends on whether the clock is being set or read */
- if (opt & DATE_OPT_REFERENCE) {
+ if (opt & OPT_REFERENCE) {
struct stat statbuf;
xstat(filename, &statbuf);
tm = statbuf.st_mtime;
- } else
+ } else {
time(&tm);
- memcpy(&tm_time, localtime(&tm), sizeof(tm_time));
+ }
+ localtime_r(&tm, &tm_time);
/* If date string is given, update tm_time, and maybe set date */
if (date_str != NULL) {
@@ -104,72 +136,14 @@
tm_time.tm_hour = 0;
/* Process any date input to UNIX time since 1 Jan 1970 */
- if (ENABLE_FEATURE_DATE_ISOFMT && (opt & DATE_OPT_HINT)) {
+ if (ENABLE_FEATURE_DATE_ISOFMT && (opt & OPT_HINT)) {
if (strptime(date_str, fmt_str2dt, &tm_time) == NULL)
bb_error_msg_and_die(bb_msg_invalid_date, date_str);
} else {
- char end = '\0';
- const char *last_colon = strrchr(date_str, ':');
-
- if (last_colon != NULL) {
- /* Parse input and assign appropriately to tm_time */
-
- if (sscanf(date_str, "%u:%u%c",
- &tm_time.tm_hour,
- &tm_time.tm_min,
- &end) >= 2) {
- /* no adjustments needed */
- } else if (sscanf(date_str, "%u.%u-%u:%u%c",
- &tm_time.tm_mon, &tm_time.tm_mday,
- &tm_time.tm_hour, &tm_time.tm_min,
- &end) >= 4) {
- /* Adjust dates from 1-12 to 0-11 */
- tm_time.tm_mon -= 1;
- } else if (sscanf(date_str, "%u.%u.%u-%u:%u%c", &tm_time.tm_year,
- &tm_time.tm_mon, &tm_time.tm_mday,
- &tm_time.tm_hour, &tm_time.tm_min,
- &end) >= 5) {
- tm_time.tm_year -= 1900; /* Adjust years */
- tm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
- } else if (sscanf(date_str, "%u-%u-%u %u:%u%c", &tm_time.tm_year,
- &tm_time.tm_mon, &tm_time.tm_mday,
- &tm_time.tm_hour, &tm_time.tm_min,
- &end) >= 5) {
- tm_time.tm_year -= 1900; /* Adjust years */
- tm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
-//TODO: coreutils 6.9 also accepts "YYYY-MM-DD HH" (no minutes)
- } else {
- bb_error_msg_and_die(bb_msg_invalid_date, date_str);
- }
- if (end == ':') {
- if (sscanf(last_colon + 1, "%u%c", &tm_time.tm_sec, &end) == 1)
- end = '\0';
- /* else end != NUL and we error out */
- }
- } else {
- if (sscanf(date_str, "%2u%2u%2u%2u%u%c", &tm_time.tm_mon,
- &tm_time.tm_mday, &tm_time.tm_hour, &tm_time.tm_min,
- &tm_time.tm_year, &end) < 4)
- bb_error_msg_and_die(bb_msg_invalid_date, date_str);
- /* correct for century - minor Y2K problem here? */
- if (tm_time.tm_year >= 1900) {
- tm_time.tm_year -= 1900;
- }
- /* adjust date */
- tm_time.tm_mon -= 1;
- if (end == '.') {
- if (sscanf(strchr(date_str, '.') + 1, "%u%c",
- &tm_time.tm_sec, &end) == 1)
- end = '\0';
- /* else end != NUL and we error out */
- }
- }
- if (end != '\0') {
- bb_error_msg_and_die(bb_msg_invalid_date, date_str);
- }
+ parse_datestr(date_str, &tm_time);
}
/* Correct any day of week and day of year etc. fields */
- tm_time.tm_isdst = -1; /* Be sure to recheck dst. */
+ tm_time.tm_isdst = -1; /* Be sure to recheck dst */
tm = mktime(&tm_time);
if (tm < 0) {
bb_error_msg_and_die(bb_msg_invalid_date, date_str);
@@ -177,7 +151,7 @@
maybe_set_utc(opt);
/* if setting time, set it */
- if ((opt & DATE_OPT_SET) && stime(&tm) < 0) {
+ if ((opt & OPT_SET) && stime(&tm) < 0) {
bb_perror_msg("cannot set date");
}
}
@@ -207,9 +181,9 @@
}
format_utc:
fmt_dt2str[i++] = '%';
- fmt_dt2str[i] = (opt & DATE_OPT_UTC) ? 'Z' : 'z';
+ fmt_dt2str[i] = (opt & OPT_UTC) ? 'Z' : 'z';
}
- } else if (opt & DATE_OPT_RFC2822) {
+ } else if (opt & OPT_RFC2822) {
/* Undo busybox.c for date -R */
if (ENABLE_LOCALE_SUPPORT)
setlocale(LC_TIME, "C");