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// Copyright 2018 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 <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#ifdef WASMFS
#include "../wasmfs/get_backend.h"
#include <emscripten/wasmfs.h>
#endif
int main() {
const char *filename = "test.dat";
const char *dirname = "test";
#ifdef WASMFS
if (wasmfs_create_directory("root", 0777, get_backend()) != 0) {
return 1;
}
if (chdir("root") != 0) {
return 1;
}
#endif
// Create a file
int fd = open(filename, O_RDWR | O_CREAT, 0777);
if (fd == -1) {
return 1;
}
// Check it exists
if (access(filename, F_OK) != 0) {
return 1;
}
// Delete the file
if (unlinkat(AT_FDCWD, filename, 0)) {
return 1;
}
// Check that it doesn't exist
if (access(filename, F_OK) != -1) {
return 1;
}
// Check that we can still write to it
if (write(fd, "hello", 5) != 5) {
return 1;
}
// And seek in it.
if (lseek(fd, 0, SEEK_SET) != 0) {
return 1;
}
// And read from it.
char buf[6] = {0};
auto r = read(fd, buf, 5);
if (r != 5) {
return 1;
}
if (strcmp("hello", buf) != 0) {
return 1;
}
if (close(fd)) {
return 1;
}
// Create a directory
if (mkdir(dirname, 0700) != 0) {
return 1;
}
// Open the directory
DIR* d = opendir(dirname);
if (d == NULL) {
return 1;
}
// Delete the directory
if (unlinkat(AT_FDCWD, dirname, AT_REMOVEDIR)) {
return 1;
}
// Check that it doesn't exist
if (access(dirname, F_OK) != -1) {
return 1;
}
// The rest of this test does not yet pass with the node backend!
#ifndef WASMFS_NODE_BACKEND
// Check that we can still read the directory, but that it is empty.
errno = 0;
if (readdir(d) != NULL || errno != 0) {
return 1;
}
// Check that we *cannot* create a child.
if (openat(dirfd(d), filename, O_CREAT | O_WRONLY, S_IRWXU) != -1) {
return 1;
}
printf("%s\n", strerror(errno));
#ifdef __EMSCRIPTEN__
// Linux allows "." and ".." to be accessed on unlinked directories, but this
// is inconsistent with the result of getdents and would unnecessarily
// complicate the file system implementation.
// TODO: Consider supporting "." on unlinked files, if not ".."
// Check that we cannot still access "."
if (openat(dirfd(d), ".", O_DIRECTORY | O_RDONLY) != -1) {
return 1;
}
#ifdef WASMFS
// Check that we cannot still access ".." on WasmFS.
if (openat(dirfd(d), "..", O_DIRECTORY | O_RDONLY) != -1) {
return 1;
}
#endif
#else
// Check that we can still access "." on Linux.
int self = openat(dirfd(d), ".", O_DIRECTORY | O_RDONLY);
if (self == -1) {
return 1;
}
close(self);
// Check that we can still access ".." on Linux.
int parent = openat(dirfd(d), "..", O_DIRECTORY | O_RDONLY);
if (parent == -1) {
return 1;
}
close(parent);
#endif
#endif // WASMFS_NODE_BACKEND
closedir(d);
printf("ok\n");
return 0;
}
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