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/*
* Copyright 2014 The Emscripten Authors. All rights reserved.
* Emscripten is available under two separate licenses, the MIT license and the
* University of Illinois/NCSA Open Source License. Both these licenses can be
* found in the LICENSE file.
*/
#include <assert.h>
#include <stdio.h>
#include <emscripten.h>
int main() {
EM_ASM(
var ex;
var contents;
// write a file that should be unaffected by this process
FS.writeFile('/safe.txt', 'abc');
// mount it the first time
FS.mkdir('/working');
FS.mount(MEMFS, {}, '/working');
FS.writeFile('/working/waka.txt', 'az');
// check the waka file
contents = FS.readFile('/working/waka.txt', { encoding: 'utf8' });
assert(contents === 'az');
#if !defined(WASMFS)
// the legacy API requires a mount directory to exist, while WasmFS will create the directory.
try {
FS.mount(MEMFS, {}, '/missing');
} catch (e) {
ex = e;
}
assert(ex.name === 'ErrnoError' && ex.errno === 44); // ENOENT
ex = null;
#endif
#if WASMFS
// WasmFS will throw an error if a directory to mount to is not empty, while the legacy API will not.
try {
FS.mkdir("/test");
FS.writeFile("/test/hi.txt", "abc");
FS.mount(MEMFS, {}, '/test');
} catch (e) {
ex = e;
}
assert(ex.name === 'ErrnoError' && ex.errno === 55); // ENOTEMPTY
ex = null;
#endif
// mount to an existing mountpoint
try {
FS.mount(MEMFS, {}, '/working');
} catch (e) {
ex = e;
}
#if WASMFS
// WasmFS returns ENOTEMPTY instead of EBUSY in exchange for a simpler implementation.
assert(ex.name === 'ErrnoError' && ex.errno === 55); // ENOTEMPTY
#else
assert(ex.name === 'ErrnoError' && ex.errno === 10); // EBUSY
#endif
ex = null;
// attempt to unmount a non-mountpoint directory inside a mountpoint
FS.mkdir('/working/unmountable');
try {
FS.unmount('/working/unmountable');
} catch (e) {
ex = e;
}
assert(ex.name === 'ErrnoError' && ex.errno === 28); // EINVAL
ex = null;
// unmount
FS.unmount('/working');
// unmount something that's not mounted
try {
FS.unmount('/working');
} catch (e) {
ex = e;
}
#if WASMFS
// WasmFS will remove a directory on unmount, regardless of if a directory existed before.
assert(ex.name === 'ErrnoError' && ex.errno === 44); // ENOENT
#else
assert(ex.name === 'ErrnoError' && ex.errno === 28); // EINVAL
#endif
ex = null;
// mount and unmount again
FS.mount(MEMFS, {}, '/working');
FS.unmount('/working');
ex = null;
// try to read the file from the old mount
try {
FS.readFile('/working/waka.txt', { encoding: 'utf8' });
} catch (e) {
ex = e;
}
#if !defined(WASMFS)
// WasmFS readFile aborts on failure, instead throwing an ErrnoError.
assert(ex.name === 'ErrnoError' && ex.errno === 44); // ENOENT
#else
assert(ex);
#endif
ex = null;
// check the safe file
contents = FS.readFile('/safe.txt', { encoding: 'utf8' });
assert(contents === 'abc');
#if WASMFS
// test JS_FILE backend
FS.mount(JSFILEFS, {}, "/jsfile");
FS.writeFile("/jsfile/jsfile.txt", "a=1");
assert(FS.readFile("/jsfile/jsfile.txt", { encoding: 'utf8' }) === 'a=1');
FS.unmount("/jsfile");
// test ICASE backend
FS.mount(ICASEFS, { backend: MEMFS }, "/icase");
FS.writeFile("/icase/IGNORE.txt", "a=1");
assert(FS.readFile("/icase/Ignore.txt", { encoding: 'utf8' }) === 'a=1');
assert(FS.readFile("/icase/ignore.TXT", { encoding: 'utf8' }) === 'a=1');
FS.unmount("/icase");
#endif
);
puts("success");
return 0;
}
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