Walter Harms added -D to date, and I did a code cleanup while I was in the

area.  Probably broke something...

2 files changed, 48 insertions, 89 deletions

diff --git a/coreutils/date.c b/coreutils/date.c
index 2d411ab..c111b61 100644
--- a/coreutils/date.c
+++ b/coreutils/date.c
@@ -6,20 +6,7 @@
  *
  * iso-format handling added by Robert Griebl <griebl@gmx.de>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */
 
 #include <stdlib.h>
@@ -31,7 +18,6 @@
 #include <string.h>
 #include "busybox.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 int, as well as
@@ -123,9 +109,8 @@ static struct tm *date_conv_ftime(struct tm *tm_time, const char *t_string)
 #define DATE_OPT_UTC		0x04
 #define DATE_OPT_DATE		0x08
 #define DATE_OPT_REFERENCE	0x10
-#ifdef CONFIG_FEATURE_DATE_ISOFMT
-# define DATE_OPT_TIMESPEC	0x20
-#endif
+#define DATE_OPT_TIMESPEC	0x20
+#define DATE_OPT_HINT		0x40
 
 int date_main(int argc, char **argv)
 {
@@ -133,63 +118,39 @@ int date_main(int argc, char **argv)
 	char *date_fmt = NULL;
 	int set_time;
 	int utc;
-#if 0
-	int use_arg = 0;
-#endif
 	time_t tm;
 	unsigned long opt;
 	struct tm tm_time;
 	char *filename = NULL;
 
-#ifdef CONFIG_FEATURE_DATE_ISOFMT
 	int ifmt = 0;
 	char *isofmt_arg;
+	char *hintfmt_arg;
 
-# define GETOPT_ISOFMT  "I::"
-#else
-# define GETOPT_ISOFMT
-#endif
 	bb_opt_complementally = "?:d--s:s--d";
-	opt = bb_getopt_ulflags(argc, argv, "Rs:ud:r:" GETOPT_ISOFMT,
+	opt = bb_getopt_ulflags(argc, argv, "Rs:ud:r:"
+		  		 	USE_FEATURE_DATE_ISOFMT("I::D:"),
 					&date_str, &date_str, &filename
-#ifdef CONFIG_FEATURE_DATE_ISOFMT
-					, &isofmt_arg
-#endif
-					);
+					USE_FEATURE_DATE_ISOFMT(, &isofmt_arg, &hintfmt_arg));
 	set_time = opt & DATE_OPT_SET;
 	utc = opt & DATE_OPT_UTC;
 	if (utc && putenv("TZ=UTC0") != 0) {
 		bb_error_msg_and_die(bb_msg_memory_exhausted);
 	}
-#if 0
-	use_arg = opt & DATE_OPT_DATE;
-#endif
-#ifdef CONFIG_FEATURE_DATE_ISOFMT
-	if(opt & DATE_OPT_TIMESPEC) {
+
+	if(ENABLE_FEATURE_DATE_ISOFMT && (opt & DATE_OPT_TIMESPEC)) {
 		if (!isofmt_arg) {
 			ifmt = 1;
 		} else {
-			int ifmt_len = bb_strlen(isofmt_arg);
-
-			if (ifmt_len <= 4
-				&& strncmp(isofmt_arg, "date", ifmt_len) == 0) {
-				ifmt = 1;
-			} else if (ifmt_len <= 5
-				   && strncmp(isofmt_arg, "hours", ifmt_len) == 0) {
-				ifmt = 2;
-			} else if (ifmt_len <= 7
-				   && strncmp(isofmt_arg, "minutes", ifmt_len) == 0) {
-				ifmt = 3;
-			} else if (ifmt_len <= 7
-				   && strncmp(isofmt_arg, "seconds", ifmt_len) == 0) {
-				ifmt = 4;
-			}
+			char *isoformats[]={"date","hours","minutes","seconds"};
+			for(ifmt = 4; ifmt;)
+				if(!strcmp(isofmt_arg,isoformats[--ifmt]))
+					break;
 		}
 		if (!ifmt) {
 			bb_show_usage();
 		}
 	}
-#endif
 
 	/* XXX, date_fmt == NULL from this always */
 	if ((date_fmt == NULL) && (optind < argc) && (argv[optind][0] == '+')) {
@@ -216,7 +177,9 @@ int date_main(int argc, char **argv)
 		tm_time.tm_hour = 0;
 
 		/* Process any date input to UNIX time since 1 Jan 1970 */
-		if (strchr(date_str, ':') != NULL) {
+		if (ENABLE_FEATURE_DATE_ISOFMT && (opt & DATE_OPT_HINT)) {
+			strptime(date_str, hintfmt_arg, &tm_time);
+		} else if (strchr(date_str, ':') != NULL) {
 			date_conv_ftime(&tm_time, date_str);
 		} else {
 			date_conv_time(&tm_time, date_str);
@@ -242,49 +205,42 @@ int date_main(int argc, char **argv)
 
 	/* Deal with format string */
 	if (date_fmt == NULL) {
-#ifdef CONFIG_FEATURE_DATE_ISOFMT
-		switch (ifmt) {
-		case 4:
-			date_fmt = utc ? "%Y-%m-%dT%H:%M:%SZ" : "%Y-%m-%dT%H:%M:%S%z";
-			break;
-		case 3:
-			date_fmt = utc ? "%Y-%m-%dT%H:%MZ" : "%Y-%m-%dT%H:%M%z";
-			break;
-		case 2:
-			date_fmt = utc ? "%Y-%m-%dT%HZ" : "%Y-%m-%dT%H%z";
-			break;
-		case 1:
-			date_fmt = "%Y-%m-%d";
-			break;
-		case 0:
-		default:
-#endif
-			date_fmt = (opt & DATE_OPT_RFC2822 ?
+		/* Start with the default case */
+		
+		date_fmt = (opt & DATE_OPT_RFC2822 ?
 					(utc ? "%a, %d %b %Y %H:%M:%S GMT" :
 					"%a, %d %b %Y %H:%M:%S %z") :
 					"%a %b %e %H:%M:%S %Z %Y");
 
-#ifdef CONFIG_FEATURE_DATE_ISOFMT
-			break;
+		if (ENABLE_FEATURE_DATE_ISOFMT) {
+			if (ifmt == 4)
+				date_fmt = utc ? "%Y-%m-%dT%H:%M:%SZ" : "%Y-%m-%dT%H:%M:%S%z";
+			else if (ifmt == 3)
+				date_fmt = utc ? "%Y-%m-%dT%H:%MZ" : "%Y-%m-%dT%H:%M%z";
+			else if (ifmt == 2) 
+				date_fmt = utc ? "%Y-%m-%dT%HZ" : "%Y-%m-%dT%H%z";
+			else if (ifmt == 1)
+				date_fmt = "%Y-%m-%d";
 		}
-#endif
-	} else if (*date_fmt == '\0') {
-		/* Imitate what GNU 'date' does with NO format string! */
-		printf("\n");
-		return EXIT_SUCCESS;
 	}
+	
+	if (*date_fmt == '\0') {
 
-	/* Handle special conversions */
+		/* With no format string, just print a blank line */
+		
+		*bb_common_bufsiz1=0;
+	} else {
 
-	if (strncmp(date_fmt, "%f", 2) == 0) {
-		date_fmt = "%Y.%m.%d-%H:%M:%S";
-	}
+		/* Handle special conversions */
+
+		if (strncmp(date_fmt, "%f", 2) == 0) {
+			date_fmt = "%Y.%m.%d-%H:%M:%S";
+		}
 
-	{
-		/* Print OUTPUT (after ALL that!) */
+		/* Generate output string */
 		strftime(bb_common_bufsiz1, 200, date_fmt, &tm_time);
-		puts(bb_common_bufsiz1);
 	}
+	puts(bb_common_bufsiz1);
 
 	return EXIT_SUCCESS;
 }
diff --git a/include/usage.h b/include/usage.h
index 3272e91..3432d17 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -332,10 +332,13 @@
 	"\nOptions:\n" \
 	"\t-R\t\tOutputs RFC-822 compliant date string\n" \
 	"\t-d STRING\tDisplays time described by STRING, not `now'\n" \
-	USAGE_DATE_ISOFMT("\t-I[TIMESPEC]\tOutputs an ISO-8601 compliant date/time string\n" \
-	"\t\t\tTIMESPEC=`date' (or missing) for date only,\n" \
-	"\t\t\t`hours', `minutes', or `seconds' for date and,\n" \
-	"\t\t\ttime to the indicated precision\n") \
+	USAGE_DATE_ISOFMT( \
+		"\t-I[TIMESPEC]\tOutputs an ISO-8601 compliant date/time string\n" \
+		"\t\t\tTIMESPEC=`date' (or missing) for date only,\n" \
+		"\t\t\t`hours', `minutes', or `seconds' for date and,\n" \
+		"\t\t\ttime to the indicated precision\n" \
+		"\t-D hint\t\tUse 'hint' as date format, via strptime()\n" \
+	) \
 	"\t-s\t\tSets time described by STRING\n" \
 	"\t-r FILE\t\tDisplays the last modification time of FILE\n" \
 	"\t-u\t\tPrints or sets Coordinated Universal Time"