usr: Add 'dmidump' program for DMI infomation

Add dmidump utility that reports information from DMI (aka system
management BIOS).

Signed-off-by: Ian Moffett <ian@osmora.org>

3 files changed, 85 insertions, 0 deletions

diff --git a/usr.bin/Makefile b/usr.bin/Makefile
index 7fdf603..d8bf421 100644
--- a/usr.bin/Makefile
+++ b/usr.bin/Makefile
@@ -25,3 +25,4 @@ all:
 	make -C whoami/ $(ARGS)
 	make -C oasm/ $(ARGS)
 	make -C oemu/ $(ARGS)
+	make -C dmidump/ $(ARGS)
diff --git a/usr.bin/dmidump/Makefile b/usr.bin/dmidump/Makefile
new file mode 100644
index 0000000..e9cd625
--- /dev/null
+++ b/usr.bin/dmidump/Makefile
@@ -0,0 +1,6 @@
+include user.mk
+
+CFILES = $(shell find . -name "*.c")
+
+$(ROOT)/base/usr/bin/dmidump:
+	gcc $(CFILES) -o $@ $(INTERNAL_CFLAGS)
diff --git a/usr.bin/dmidump/dmidump.c b/usr.bin/dmidump/dmidump.c
new file mode 100644
index 0000000..96d97bc
--- /dev/null
+++ b/usr.bin/dmidump/dmidump.c
@@ -0,0 +1,78 @@
+/*
+ * 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/dmi.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+
+/*
+ * The kernel fills DMI structures to zero,
+ * if any of the fields are unset then p[0]
+ * will have a null terminator which tells
+ * us we should ignore it.
+ */
+static void
+dmi_printfield(const char *name, const char *p)
+{
+    if (p[0] == '\0') {
+        return;
+    }
+
+    printf("%s: %s\n", name, p);
+}
+
+static void
+dmi_dump_board(void)
+{
+    struct dmi_board board;
+    int fd;
+
+    fd = open("/ctl/dmi/board", O_RDONLY);
+    if (fd < 0) {
+        printf("failed to open board control\n");
+        return;
+    }
+
+    read(fd, &board, sizeof(board));
+    printf("** BOARD INFO **\n");
+    dmi_printfield("CPU version", board.cpu_version);
+    dmi_printfield("CPU OEM", board.cpu_manuf);
+    dmi_printfield("product", board.product);
+    dmi_printfield("vendor", board.vendor);
+    dmi_printfield("version", board.version);
+    close(fd);
+}
+
+int
+main(int argc, char **argv)
+{
+    dmi_dump_board();
+    return 0;
+}