1 files changed, 96 insertions, 0 deletions
diff --git a/sys/kern/kern_syslog.c b/sys/kern/kern_syslog.c
new file mode 100644
index 0000000..cd7f8f0
--- /dev/null
+++ b/sys/kern/kern_syslog.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2023 Ian Marco Moffett and the VegaOS 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 VegaOS 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.
+ */
+
+/* $Id$ */
+
+#include <sys/syslog.h>
+#include <sys/tty.h>
+#include <string.h>
+
+static struct tty syslog_tty;
+
+static void
+syslog_handle_fmt(va_list *ap, char fmt_spec)
+{
+    char tmp_ch;
+    int64_t tmp_int;
+    const char *tmp_str;
+    char tmp_buf[256] = { 0 };
+
+    switch (fmt_spec) {
+    case 'c':
+        tmp_ch = va_arg(*ap, int);
+        tty_write(&syslog_tty, &tmp_ch, 1);
+        break;
+    case 's':
+        tmp_str = va_arg(*ap, const char *);
+        tty_write(&syslog_tty, tmp_str, strlen(tmp_str));
+        break;
+    case 'd':
+        tmp_int = va_arg(*ap, int64_t);
+        itoa(tmp_int, tmp_buf, 10);
+        tty_write(&syslog_tty, tmp_buf, strlen(tmp_buf));
+        break;
+    case 'x':
+        tmp_int = va_arg(*ap, uint64_t);
+        itoa(tmp_int, tmp_buf, 16);
+        tty_write(&syslog_tty, tmp_buf + 2, strlen(tmp_buf) - 2);
+        break;
+    }
+}
+
+void
+vkprintf(const char *fmt, va_list *ap)
+{
+    while (*fmt) {
+        if (*fmt == '%') {
+            ++fmt;
+            syslog_handle_fmt(ap, *fmt++);
+        } else {
+            tty_write(&syslog_tty, fmt++, 1);
+        }
+    }
+}
+
+void
+kprintf(const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    vkprintf(fmt, &ap);
+    va_end(ap);
+}
+
+void
+syslog_init(void)
+{
+    tty_set_defaults(&syslog_tty);
+    tty_attach(&syslog_tty);
+}