1 files changed, 241 insertions, 0 deletions
diff --git a/release/src/router/busybox/date.c b/release/src/router/busybox/date.c
new file mode 100644
index 00000000..91ad11bd
--- /dev/null
+++ b/release/src/router/busybox/date.c
@@ -0,0 +1,241 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini date implementation for busybox
+ *
+ * by Matthew Grant <grantma@anathoth.gen.nz>
+ *
+ * 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
+ *
+*/
+
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <time.h>
+#include <stdio.h>
+#include <string.h>
+#include <getopt.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
+   an RFC 822 complient date output for shell scripting
+   mail commands */
+
+/* Input parsing code is always bulky - used heavy duty libc stuff as
+   much as possible, missed out a lot of bounds checking */
+
+/* Default input handling to save suprising some people */
+
+static struct tm *date_conv_time(struct tm *tm_time, const char *t_string)
+{
+	int nr;
+
+	nr = sscanf(t_string, "%2d%2d%2d%2d%d",
+				&(tm_time->tm_mon),
+				&(tm_time->tm_mday),
+				&(tm_time->tm_hour),
+				&(tm_time->tm_min), &(tm_time->tm_year));
+
+	if (nr < 4 || nr > 5) {
+		error_msg_and_die(invalid_date, t_string); 
+	}
+
+	/* 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;
+
+	return (tm_time);
+
+}
+
+
+/* The new stuff for LRP */
+
+static struct tm *date_conv_ftime(struct tm *tm_time, const char *t_string)
+{
+	struct tm t;
+
+	/* Parse input and assign appropriately to tm_time */
+
+	if (t=*tm_time,sscanf(t_string, "%d:%d:%d",
+			   &t.tm_hour, &t.tm_min, &t.tm_sec) == 3) {
+					/* no adjustments needed */
+
+	} else if (t=*tm_time,sscanf(t_string, "%d:%d",
+					  &t.tm_hour, &t.tm_min) == 2) {
+					/* no adjustments needed */
+
+
+	} else if (t=*tm_time,sscanf(t_string, "%d.%d-%d:%d:%d",
+					  &t.tm_mon,
+					  &t.tm_mday,
+					  &t.tm_hour,
+					  &t.tm_min, &t.tm_sec) == 5) {
+
+		t.tm_mon -= 1;	/* Adjust dates from 1-12 to 0-11 */
+
+	} else if (t=*tm_time,sscanf(t_string, "%d.%d-%d:%d",
+					  &t.tm_mon,
+					  &t.tm_mday,
+					  &t.tm_hour, &t.tm_min) == 4) {
+
+		t.tm_mon -= 1;	/* Adjust dates from 1-12 to 0-11 */
+
+	} else if (t=*tm_time,sscanf(t_string, "%d.%d.%d-%d:%d:%d",
+					  &t.tm_year,
+					  &t.tm_mon,
+					  &t.tm_mday,
+					  &t.tm_hour,
+					  &t.tm_min, &t.tm_sec) == 6) {
+
+		t.tm_year -= 1900;	/* Adjust years */
+		t.tm_mon -= 1;	/* Adjust dates from 1-12 to 0-11 */
+
+	} else if (t=*tm_time,sscanf(t_string, "%d.%d.%d-%d:%d",
+					  &t.tm_year,
+					  &t.tm_mon,
+					  &t.tm_mday,
+					  &t.tm_hour, &t.tm_min) == 5) {
+		t.tm_year -= 1900;	/* Adjust years */
+		t.tm_mon -= 1;	/* Adjust dates from 1-12 to 0-11 */
+
+	} else {
+		error_msg_and_die(invalid_date, t_string); 
+	}
+	*tm_time = t;
+	return (tm_time);
+}
+
+
+int date_main(int argc, char **argv)
+{
+	char *date_str = NULL;
+	char *date_fmt = NULL;
+	char *t_buff;
+	int c;
+	int set_time = 0;
+	int rfc822 = 0;
+	int utc = 0;
+	int use_arg = 0;
+	time_t tm;
+	struct tm tm_time;
+
+	/* Interpret command line args */
+	while ((c = getopt(argc, argv, "Rs:ud:")) != EOF) {
+		switch (c) {
+			case 'R':
+				rfc822 = 1;
+				break;
+			case 's':
+				set_time = 1;
+				if ((date_str != NULL) || ((date_str = optarg) == NULL)) {
+					show_usage();
+				}
+				break;
+			case 'u':
+				utc = 1;
+				if (putenv("TZ=UTC0") != 0)
+					error_msg_and_die(memory_exhausted);
+				break;
+			case 'd':
+				use_arg = 1;
+				if ((date_str != NULL) || ((date_str = optarg) == NULL))
+					show_usage();
+				break;
+			default:
+				show_usage();
+		}
+	}
+
+	if ((date_fmt == NULL) && (optind < argc) && (argv[optind][0] == '+'))
+		date_fmt = &argv[optind][1];   /* Skip over the '+' */
+	else if (date_str == NULL) {
+		set_time = 1;
+		date_str = argv[optind];
+	} 
+
+	/* Now we have parsed all the information except the date format
+	   which depends on whether the clock is being set or read */
+
+	time(&tm);
+	memcpy(&tm_time, localtime(&tm), sizeof(tm_time));
+	/* Zero out fields - take her back to midnight! */
+	if (date_str != NULL) {
+		tm_time.tm_sec = 0;
+		tm_time.tm_min = 0;
+		tm_time.tm_hour = 0;
+	}
+
+	/* Process any date input to UNIX time since 1 Jan 1970 */
+	if (date_str != NULL) {
+
+		if (strchr(date_str, ':') != NULL) {
+			date_conv_ftime(&tm_time, date_str);
+		} else {
+			date_conv_time(&tm_time, date_str);
+		}
+
+		/* Correct any day of week and day of year etc. fields */
+		tm = mktime(&tm_time);
+		if (tm < 0)
+			error_msg_and_die(invalid_date, date_str); 
+		if ( utc ) {
+			if (putenv("TZ=UTC0") != 0)
+				error_msg_and_die(memory_exhausted);
+		}
+
+		/* if setting time, set it */
+		if (set_time) {
+			if (stime(&tm) < 0) {
+				perror_msg("cannot set date");
+			}
+		}
+	}
+
+	/* Display output */
+
+	/* Deal with format string */
+	if (date_fmt == NULL) {
+		date_fmt = (rfc822
+					? (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");
+
+	} else if (*date_fmt == '\0') {
+		/* Imitate what GNU 'date' does with NO format string! */
+		printf("\n");
+		return EXIT_SUCCESS;
+	}
+
+	/* Handle special conversions */
+
+	if (strncmp(date_fmt, "%f", 2) == 0) {
+		date_fmt = "%Y.%m.%d-%H:%M:%S";
+	}
+
+	/* Print OUTPUT (after ALL that!) */
+	t_buff = xmalloc(201);
+	strftime(t_buff, 200, date_fmt, &tm_time);
+	puts(t_buff);
+
+	return EXIT_SUCCESS;
+}