📝 Added sandbox (code sketchbook)

sandbox/open.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+
+int main(int argc, char const *argv[]) {
+    (void)argc;
+    (void)argv;
+
+    int fd;
+    char buff[1000];
+
+    printf("Enter a file you wish to open: \n");
+    scanf("%s", buff);
+
+    if ((fd = open(buff, O_RDONLY)) == -1) {
+        printf("file opening failed\n");
+        exit(0);
+    } else {
+        printf("file opening successful\n");
+        printf("file descriptor: %d\n", fd);
+    }
+
+    if (read(fd, buff, sizeof(buff)) == -1) {
+        printf("Error while reading file\n");
+        exit(0);
+    } else {
+        printf("wrote %lu bytes to the file\n", strlen(buff));
+        printf("File contents: %s\n", buff);
+    }
+}