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#include <assert.h>
#include <emscripten/console.h>
#include <emscripten/emscripten.h>
#include <emscripten/wasmfs.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int main() {
wasmfs_create_directory("/opfs", 0777, wasmfs_create_opfs_backend());
EM_ASM({ run_test(); });
emscripten_exit_with_live_runtime();
}
const char* file = "/opfs/data";
// Each of these functions returns:
// 0: failure with EACCES (or other expected error code)
// 1: success
// 2: other error
static int try_open(int flags) {
int fd = open(file, flags);
if (fd >= 0) {
int err = close(fd);
assert(err == 0);
return 1;
}
if (errno == EACCES) {
return 0;
}
emscripten_console_error(strerror(errno));
return 2;
}
EMSCRIPTEN_KEEPALIVE
int try_open_wronly(void) {
return try_open(O_WRONLY);
}
EMSCRIPTEN_KEEPALIVE
int try_open_rdwr(void) {
return try_open(O_RDWR);
}
EMSCRIPTEN_KEEPALIVE
int try_open_rdonly(void) {
return try_open(O_RDONLY);
}
EMSCRIPTEN_KEEPALIVE
int try_truncate(void) {
int err = truncate(file, 42);
if (err == 0) {
return 1;
}
if (errno == EIO) {
return 0;
}
emscripten_console_error(strerror(errno));
return 2;
}
EMSCRIPTEN_KEEPALIVE
int try_unlink(void) {
int err = unlink(file);
if (err == 0) {
return 1;
}
if (errno == EIO) {
return 0;
}
emscripten_console_error(strerror(errno));
return 2;
}
EMSCRIPTEN_KEEPALIVE
int try_oob_read(void) {
int fd = open(file, O_RDWR);
if (fd < 0) {
emscripten_outf("fd %d", fd);
return 2;
}
char buf;
int nread = pread(fd, &buf, 1, (off_t)-1ll);
if (nread > 0) {
close(fd);
return 1;
}
if (errno == EINVAL) {
close(fd);
return 0;
}
emscripten_outf("errno %d", errno);
close(fd);
return 2;
}
EMSCRIPTEN_KEEPALIVE
int try_oob_write(void) {
int fd = open(file, O_RDWR);
if (fd < 0) {
emscripten_console_error(strerror(errno));
return 2;
}
char buf = 0;
int nread = pwrite(fd, &buf, 1, (off_t)-1ll);
if (nread > 0) {
close(fd);
return 1;
}
if (errno == EINVAL) {
close(fd);
return 0;
}
emscripten_console_error(strerror(errno));
close(fd);
return 2;
}
EMSCRIPTEN_KEEPALIVE
int try_rename_dir(void) {
int err = mkdir("/opfs/dir1", 0666);
if (err != 0) {
return 2;
}
err = rename("/opfs/dir1", "/opfs/dir2");
if (err == 0) {
return 1;
}
if (errno == EBUSY) {
rmdir("/opfs/dir1");
return 0;
}
emscripten_console_error(strerror(errno));
rmdir("/opfs/dir1");
return 2;
}
EMSCRIPTEN_KEEPALIVE
void report_result(int result) {
EM_ASM({ out(new Error().stack); });
#ifdef REPORT_RESULT
REPORT_RESULT(result);
#else
if (result != 0) {
abort();
}
#endif
}
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