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-rw-r--r--util/post/.gitignore1
-rw-r--r--util/post/Makefile4
-rw-r--r--util/post/README1
-rw-r--r--util/post/post.c91
4 files changed, 97 insertions, 0 deletions
diff --git a/util/post/.gitignore b/util/post/.gitignore
new file mode 100644
index 0000000000..8b1e502f81
--- /dev/null
+++ b/util/post/.gitignore
@@ -0,0 +1 @@
+post
diff --git a/util/post/Makefile b/util/post/Makefile
new file mode 100644
index 0000000000..d0a3eb99e4
--- /dev/null
+++ b/util/post/Makefile
@@ -0,0 +1,4 @@
+all:
+ $(CC) post.c -o post
+clean:
+ rm -f post
diff --git a/util/post/README b/util/post/README
new file mode 100644
index 0000000000..95b33a9faf
--- /dev/null
+++ b/util/post/README
@@ -0,0 +1 @@
+This is a very simple userspace utility that can be used to test POST cards.
diff --git a/util/post/post.c b/util/post/post.c
new file mode 100644
index 0000000000..6d67909f35
--- /dev/null
+++ b/util/post/post.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2016 Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
+ *
+ * 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.
+ */
+
+#include <errno.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/io.h>
+
+#define POST_DEFAULT_IO_PORT 0x80
+
+void usage(char *progname, const char *error, ...)
+{
+ printf("Usage: %s <VALUE> [PORT]\n", progname);
+ printf("The VALUE argument is an integer between 0x00 and 0xff\n");
+ printf("The PORT argument is an integer between 0x00 and 0xffff\n");
+
+ if (error) {
+ va_list args;
+
+ va_start(args, error);
+ vprintf(error, args);
+ va_end(args);
+ };
+}
+
+void check_int(long val, int min, int max, int err, char *string, char *endptr,
+ char *progname)
+{
+ if (val < min || val > max) {
+ usage(progname,
+ "\nError: The value has to be between 0x%x and 0x%x\n",
+ min, max);
+ exit(EXIT_FAILURE);
+ }
+
+ if (endptr == string || *endptr != '\0') {
+ usage(progname, "\nError: An integer is required\n");
+ exit(EXIT_FAILURE);
+ }
+
+ if ((err) && (!val)) {
+ perror("strtol");
+ exit(EXIT_FAILURE);
+ }
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned long val;
+ unsigned long port = POST_DEFAULT_IO_PORT;
+ char *endptr;
+ int err;
+
+ if (argc != 2 && argc != 3) {
+ usage(argv[0], NULL);
+ exit(EXIT_FAILURE);
+ }
+
+ val = strtol(argv[1], &endptr, 0);
+ err = errno;
+ check_int(val, 0x00, 0xff, err, argv[1], endptr, argv[0]);
+
+ if (argc > 2) {
+ port = strtol(argv[2], &endptr, 0);
+ err = errno;
+ check_int(port, 0x0000, 0xffff, err, argv[2], endptr, argv[0]);
+ }
+
+ err = iopl(3);
+ if (err == -1) {
+ perror("Not root");
+ exit(EXIT_FAILURE);
+ }
+
+ outb(val, port);
+
+ return 0;
+}