fix: corner cases when printing large content through term interface

[lunaix-os.git] / lunaix-os / usr / testp.c

diff --git a/lunaix-os/usr/testp.c b/lunaix-os/usr/testp.c
new file mode 100644 (file)
index 0000000..8011c30
--- /dev/null
+++ b/lunaix-os/usr/testp.c
@@ -0,0 +1,50 @@
+#include <errno.h>
+#include <fcntl.h>
+#include <lunaix/lunaix.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+void
+test_serial()
+{
+    int fd = open("/dev/ttyS0", FO_WRONLY);
+    if (fd < 0) {
+        printf("ttyS0 not accessable (%d)\n", errno);
+        return;
+    }
+
+    char buf[32];
+    int sz = 0;
+
+    printf("ttyS0 input: ");
+
+    if ((sz = read(fd, buf, 31)) < 0) {
+        printf("write to ttyS0 failed (%d)\n", errno);
+    }
+
+    buf[sz] = 0;
+
+    printf("%s", buf);
+
+    close(fd);
+}
+
+int
+main(int argc, char* argv[])
+{
+    if (argc <= 1) {
+        return 1;
+    }
+
+    char* target = argv[1];
+
+    if (!strcmp(target, "serial")) {
+        test_serial();
+    } else {
+        printf("unknown test: %s\n", target);
+        return 1;
+    }
+
+    return 0;
+}
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