fd

tests/c/fd.c

@@ -0,0 +1,29 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <assert.h>
+
+int main(int argc, char *argv[])
+{
+    int alphabet = open("data/alphabet.txt", O_RDONLY);
+    assert(alphabet != -1 && "failed to open file");
+
+    off_t off;
+
+    off = lseek(alphabet, 10, SEEK_SET);
+    assert(off != -1 && "failed to seek file");
+
+    char buf[1];
+    ssize_t amount;
+
+    amount = read(alphabet, buf, 1);
+    assert(amount == 1 && "failed to read from alphabet");
+    assert(buf[0] == 'k' && "character at offest 10 is not k");
+
+
+    off = lseek(alphabet, 1, SEEK_CUR);
+    assert(off != -1 && "failed to seek file");
+
+    amount = read(alphabet, buf, 1);
+    assert(amount == 1 && "failed to read from alphabet");
+    assert(buf[0] == 'm' && "character at offest 12 is not m");
+}