Add basic test for statvfs

tests/sys_statvfs/statvfs.c

@@ -0,0 +1,48 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/statvfs.h>
+
+void test_statvfs(const char *path) {
+    struct statvfs buf;
+
+    printf("Testing statvfs on: %s\n", path);
+
+    if (statvfs(path, &buf) != 0) {
+        perror("statvfs failed");
+        exit(EXIT_FAILURE);
+    }
+
+    printf("  Filesystem block size: %lu\n", buf.f_bsize);
+    printf("  Fragment size:         %lu\n", buf.f_frsize);
+    printf("  Total blocks:          %lu\n", buf.f_blocks);
+    printf("  Free blocks:           %lu\n", buf.f_bfree);
+    printf("  Available blocks:      %lu\n", buf.f_bavail);
+    printf("  Total inodes:          %lu\n", buf.f_files);
+    printf("  Free inodes:           %lu\n", buf.f_ffree);
+
+    if (buf.f_bsize == 0 || buf.f_frsize == 0) {
+        fprintf(stderr, "ERROR: Block size or fragment size is zero.\n");
+        exit(EXIT_FAILURE);
+    }
+
+    if (buf.f_blocks == 0) {
+        fprintf(stderr, "ERROR: Total number of blocks is zero.\n");
+        exit(EXIT_FAILURE);
+    }
+
+    printf("Test passed: statvfs returned valid values.\n");
+}
+
+int main(int argc, char *argv[]) {
+    const char *test_path = "/";
+
+    if (argc > 1) {
+        test_path = argv[1];
+    }
+
+    test_statvfs(test_path);
+
+    return 0;
+}