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/*
* Copyright 2021 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 <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/stat.h>
void create_file(const char *path, const char *buffer, int mode) {
int fd = open(path, O_WRONLY | O_CREAT | O_EXCL, mode);
assert(fd >= 0);
int err = write(fd, buffer, sizeof(char) * strlen(buffer));
assert(err == (sizeof(char) * strlen(buffer)));
close(fd);
}
void setup() {
mkdir("folder", 0777);
create_file("folder/file", "abcdef", 0777);
symlink("file", "folder/file-link");
}
void test() {
int err;
struct stat s;
int fd = open(".", O_RDONLY);
assert(fd >= 0);
// missing file
err = fstatat(fd, "does_not_exist", &s, 0);
assert(err == -1);
printf("errno: %d\n", errno);
assert(errno == ENOENT);
// stat a folder
memset(&s, 0, sizeof(s));
err = fstatat(fd, "folder", &s, 0);
assert(!err);
assert(s.st_dev);
assert(s.st_ino);
assert(S_ISDIR(s.st_mode));
assert(s.st_nlink);
assert(s.st_rdev == 0);
assert(s.st_size);
assert(s.st_ctime);
#ifdef __EMSCRIPTEN__
assert(s.st_blksize == 4096);
// WasmFS correctly counts 512B blocks, but MEMFS counts 4kb blocks.
#ifdef WASMFS
assert(s.st_blocks == 8);
#else
assert(s.st_blocks == 1);
#endif
#endif
// stat a file
memset(&s, 0, sizeof(s));
err = fstatat(fd, "folder/file", &s, 0);
assert(!err);
assert(s.st_dev);
assert(s.st_ino);
assert(S_ISREG(s.st_mode));
assert(s.st_nlink);
assert(s.st_rdev == 0);
assert(s.st_size == 6);
assert(s.st_ctime);
#ifdef __EMSCRIPTEN__
assert(s.st_blksize == 4096);
assert(s.st_blocks == 1);
#endif
close(fd);
fd = open("folder", O_RDONLY);
assert(fd >= 0);
// missing file
err = fstatat(fd, "does_not_exist", &s, 0);
assert(err == -1);
assert(errno == ENOENT);
// stat a file
memset(&s, 0, sizeof(s));
err = fstatat(fd, "file", &s, 0);
assert(!err);
// empty path - not allowed
err = fstatat(fd, "", &s, 0);
assert(err == -1);
assert(errno == ENOENT);
// empty path - with AT_EMPTY_PATH (stat's the fd itself, a directory in this case)
memset(&s, 0, sizeof(s));
err = fstatat(fd, "", &s, AT_EMPTY_PATH);
assert(!err);
assert(s.st_dev);
assert(s.st_ino);
assert(S_ISDIR(s.st_mode));
assert(s.st_nlink);
assert(s.st_rdev == 0);
assert(s.st_size);
assert(s.st_ctime);
#ifdef __EMSCRIPTEN__
assert(s.st_blksize == 4096);
#ifdef WASMFS
assert(s.st_blocks == 8);
#else
assert(s.st_blocks == 1);
#endif
#endif
close(fd);
fd = open("folder/file", O_RDONLY);
assert(fd >= 0);
// empty path - with AT_EMPTY_PATH (stat's the fd itself, a file)
memset(&s, 0, sizeof(s));
err = fstatat(fd, "", &s, AT_EMPTY_PATH);
assert(!err);
assert(s.st_dev);
assert(s.st_ino);
assert(S_ISREG(s.st_mode));
assert(s.st_nlink);
assert(s.st_rdev == 0);
assert(s.st_size == 6);
assert(s.st_ctime);
#ifdef __EMSCRIPTEN__
assert(s.st_blksize == 4096);
assert(s.st_blocks == 1);
#endif
close(fd);
// lstat a link - with AT_FDCWD and AT_SYMLINK_NOFOLLOW.
// Also test that AT_NO_AUTOMOUNT is ignored.
memset(&s, 0, sizeof(s));
err = fstatat(AT_FDCWD, "folder/file-link", &s, AT_SYMLINK_NOFOLLOW|AT_NO_AUTOMOUNT);
assert(!err);
assert(s.st_dev);
assert(s.st_ino);
assert(S_ISLNK(s.st_mode));
assert(s.st_nlink);
assert(s.st_rdev == 0);
assert(s.st_size == 4);
assert(s.st_ctime);
#ifdef __EMSCRIPTEN__
assert(s.st_blksize == 4096);
assert(s.st_blocks == 1);
#endif
puts("success");
}
int main() {
setup();
test();
return 0;
}
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