Why fopen returns NULL?

[yushulx]

I tried to use fopen to read an image:

#include <stdio.h>

int main()
{
    FILE *f = fopen("1.png", "rb");
    printf("file %p\n", f);
    fclose(f);
}

Build:

$ clang --target=wasm32-wasi --sysroot=/opt/wasi-sdk/share/wasi-sysroot/ test.c -o test.wasm
$ wasmtime test.wasm
$ file 0

But it returned NULL. How can I fix it?

[yushulx]

Fixed:

wasmtime --dir=.  test.wasm