1 files changed, 86 insertions, 0 deletions
diff --git a/usr.bin/date/date.c b/usr.bin/date/date.c
new file mode 100644
index 0000000..a47e3eb
--- /dev/null
+++ b/usr.bin/date/date.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/time.h>
+#include <sys/cdefs.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#define MONTHS_PER_YEAR 12
+#define DAYS_PER_WEEK 7
+
+/* Months of the year */
+static const char *montab[] = {
+    "Jan", "Feb", "Mar",
+    "Apr", "May", "Jun",
+    "Jul", "Aug", "Sep",
+    "Oct", "Nov", "Dec"
+};
+
+/* Days of the week */
+static const char *daytab[] = {
+    "Sat", "Sun", "Mon",
+    "Tue", "Wed", "Thu",
+    "Fri"
+};
+
+int
+main(void)
+{
+    const char *day, *month;
+    char date_str[32];
+    struct date d;
+    int rtc_fd;
+
+    if ((rtc_fd = open("/dev/rtc", O_RDONLY)) < 0) {
+        return rtc_fd;
+    }
+
+    read(rtc_fd, &d, sizeof(d));
+    close(rtc_fd);
+
+    /* This should not happen */
+    if (__unlikely(d.month > MONTHS_PER_YEAR)) {
+        printf("got bad month %d from RTC\n", d.month);
+        return -1;
+    }
+    if (__unlikely(d.month == 0 || d.day == 0)) {
+        printf("got zero month/day from RTC\n");
+        return -1;
+    }
+
+    day = daytab[d.day % DAYS_PER_WEEK];
+    month = montab[d.month - 1];
+
+    snprintf(date_str, sizeof(date_str), "%s %s %d %02d:%02d:%02d\n",
+        day, month, d.day, d.hour, d.min, d.sec);
+    fputs(date_str, stdout);
+    return 0;
+}