X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/baca54322c66983205edecd2ebb00d997878be50..270869139db617e29a35bb9ded41087bb702f9ac:/lunaix-os/usr/file_test.c

diff --git a/lunaix-os/usr/file_test.c b/lunaix-os/usr/file_test.c
new file mode 100644
index 0000000..dfd960d
--- /dev/null
+++ b/lunaix-os/usr/file_test.c
@@ -0,0 +1,48 @@
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#define BUFSIZE 4096
+
+static char buffer[BUFSIZE];
+
+#define _open(f, o)                                                 \
+    ({                                                              \
+        int __fd = open(f, o);                                      \
+        if (__fd < 0) {                                             \
+            printf("open failed: %s (error: %d)", f, errno);   \
+            _exit(__fd);                                            \
+        }                                                           \
+        __fd;                                                       \
+    })
+
+int
+main(int argc, const char* argv[])
+{
+    int fd = 0, fdrand = 0;
+    int size = 0, sz2 = 0;
+
+    fd = _open(argv[1], O_RDWR | O_CREAT);
+    fdrand = _open("/dev/rand", O_RDONLY);
+    
+    for (int i = 0; i < 100; i++)
+    {
+        printf("write to file: (round) {%d}/100\n", i + 1);
+        
+        size = read(fdrand, buffer, BUFSIZE);
+        printf(">>> read random chars: %d\n", size);
+        for (int i = 0; i < size; i++)
+        {
+            buffer[i] = (char)((unsigned char)(buffer[i] % 94U) + 33U);
+        }
+        
+        sz2 += write(fd, buffer, size);
+        sz2 += write(fd, "\n\n", 2);
+    }
+
+    close(fd);
+    close(fdrand);
+
+    return 0;
+}
\ No newline at end of file