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#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.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() {
create_file("file", "abcdef", 0777);
mkdir("dir", 0777);
create_file("dir/file", "abcdef", 0777);
mkdir("dir/subdir", 0777);
mkdir("dir-readonly", 0555);
mkdir("dir-nonempty", 0777);
create_file("dir-nonempty/file", "abcdef", 0777);
}
void cleanup() {
// we're hulk-smashing and removing original + renamed files to
// make sure we get it all regardless of anything failing
unlink("file");
unlink("dir/file");
unlink("dir/file1");
unlink("dir/file2");
rmdir("dir/subdir");
rmdir("dir/subdir1");
rmdir("dir/subdir2");
rmdir("dir");
rmdir("dir-readonly");
unlink("dir-nonempty/file");
rmdir("dir-nonempty");
}
void test() {
int err;
// can't rename something that doesn't exist
err = rename("noexist", "dir");
assert(err == -1);
assert(errno == ENOENT);
// can't overwrite a folder with a file
err = rename("file", "dir");
assert(err == -1);
assert(errno == EISDIR);
// can't overwrite a file with a folder
err = rename("dir", "file");
assert(err == -1);
assert(errno == ENOTDIR);
// can't overwrite a non-empty folder
err = rename("dir", "dir-nonempty");
assert(err == -1);
assert(errno == ENOTEMPTY);
// can't create anything in a read-only directory
err = rename("dir", "dir-readonly/dir");
assert(err == -1);
assert(errno == EACCES);
// source should not be ancestor of target
err = rename("dir", "dir/somename");
assert(err == -1);
assert(errno == EINVAL);
// target should not be an ancestor of source
err = rename("dir/subdir", "dir");
assert(err == -1);
assert(errno == ENOTEMPTY);
// do some valid renaming
err = rename("dir/file", "dir/file1");
assert(!err);
err = rename("dir/file1", "dir/file2");
assert(!err);
err = access("dir/file2", F_OK);
assert(!err);
err = rename("dir/subdir", "dir/subdir1");
assert(!err);
err = rename("dir/subdir1", "dir/subdir2");
assert(!err);
err = access("dir/subdir2", F_OK);
assert(!err);
puts("success");
}
int main() {
atexit(cleanup);
signal(SIGABRT, cleanup);
setup();
test();
return EXIT_SUCCESS;
}
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