diff options
Diffstat (limited to 'src/test/test-copy.c')
| -rw-r--r-- | src/test/test-copy.c | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/src/test/test-copy.c b/src/test/test-copy.c new file mode 100644 index 0000000..ffa9297 --- /dev/null +++ b/src/test/test-copy.c @@ -0,0 +1,323 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <sys/xattr.h> +#include <unistd.h> + +#include "alloc-util.h" +#include "copy.h" +#include "fd-util.h" +#include "fileio.h" +#include "fs-util.h" +#include "hexdecoct.h" +#include "log.h" +#include "macro.h" +#include "mkdir.h" +#include "path-util.h" +#include "rm-rf.h" +#include "string-util.h" +#include "strv.h" +#include "tests.h" +#include "tmpfile-util.h" +#include "user-util.h" +#include "util.h" +#include "xattr-util.h" + +static void test_copy_file(void) { + _cleanup_free_ char *buf = NULL; + char fn[] = "/tmp/test-copy_file.XXXXXX"; + char fn_copy[] = "/tmp/test-copy_file.XXXXXX"; + size_t sz = 0; + int fd; + + log_info("%s", __func__); + + fd = mkostemp_safe(fn); + assert_se(fd >= 0); + close(fd); + + fd = mkostemp_safe(fn_copy); + assert_se(fd >= 0); + close(fd); + + assert_se(write_string_file(fn, "foo bar bar bar foo", WRITE_STRING_FILE_CREATE) == 0); + + assert_se(copy_file(fn, fn_copy, 0, 0644, 0, 0, COPY_REFLINK) == 0); + + assert_se(read_full_file(fn_copy, &buf, &sz) == 0); + assert_se(streq(buf, "foo bar bar bar foo\n")); + assert_se(sz == 20); + + unlink(fn); + unlink(fn_copy); +} + +static void test_copy_file_fd(void) { + char in_fn[] = "/tmp/test-copy-file-fd-XXXXXX"; + char out_fn[] = "/tmp/test-copy-file-fd-XXXXXX"; + _cleanup_close_ int in_fd = -1, out_fd = -1; + const char *text = "boohoo\nfoo\n\tbar\n"; + char buf[64] = {}; + + log_info("%s", __func__); + + in_fd = mkostemp_safe(in_fn); + assert_se(in_fd >= 0); + out_fd = mkostemp_safe(out_fn); + assert_se(out_fd >= 0); + + assert_se(write_string_file(in_fn, text, WRITE_STRING_FILE_CREATE) == 0); + assert_se(copy_file_fd("/a/file/which/does/not/exist/i/guess", out_fd, COPY_REFLINK) < 0); + assert_se(copy_file_fd(in_fn, out_fd, COPY_REFLINK) >= 0); + assert_se(lseek(out_fd, SEEK_SET, 0) == 0); + + assert_se(read(out_fd, buf, sizeof buf) == (ssize_t) strlen(text)); + assert_se(streq(buf, text)); + + unlink(in_fn); + unlink(out_fn); +} + +static void test_copy_tree(void) { + char original_dir[] = "/tmp/test-copy_tree/"; + char copy_dir[] = "/tmp/test-copy_tree-copy/"; + char **files = STRV_MAKE("file", "dir1/file", "dir1/dir2/file", "dir1/dir2/dir3/dir4/dir5/file"); + char **symlinks = STRV_MAKE("link", "file", + "link2", "dir1/file"); + char **hardlinks = STRV_MAKE("hlink", "file", + "hlink2", "dir1/file"); + const char *unixsockp; + char **p, **ll; + struct stat st; + int xattr_worked = -1; /* xattr support is optional in temporary directories, hence use it if we can, + * but don't fail if we can't */ + + log_info("%s", __func__); + + (void) rm_rf(copy_dir, REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf(original_dir, REMOVE_ROOT|REMOVE_PHYSICAL); + + STRV_FOREACH(p, files) { + _cleanup_free_ char *f, *c; + int k; + + assert_se(f = path_join(original_dir, *p)); + + assert_se(mkdir_parents(f, 0755) >= 0); + assert_se(write_string_file(f, "file", WRITE_STRING_FILE_CREATE) == 0); + + assert_se(base64mem(*p, strlen(*p), &c) >= 0); + + k = setxattr(f, "user.testxattr", c, strlen(c), 0); + assert_se(xattr_worked < 0 || ((k >= 0) == !!xattr_worked)); + xattr_worked = k >= 0; + } + + STRV_FOREACH_PAIR(ll, p, symlinks) { + _cleanup_free_ char *f, *l; + + assert_se(f = path_join(original_dir, *p)); + assert_se(l = path_join(original_dir, *ll)); + + assert_se(mkdir_parents(l, 0755) >= 0); + assert_se(symlink(f, l) == 0); + } + + STRV_FOREACH_PAIR(ll, p, hardlinks) { + _cleanup_free_ char *f, *l; + + assert_se(f = path_join(original_dir, *p)); + assert_se(l = path_join(original_dir, *ll)); + + assert_se(mkdir_parents(l, 0755) >= 0); + assert_se(link(f, l) == 0); + } + + unixsockp = strjoina(original_dir, "unixsock"); + assert_se(mknod(unixsockp, S_IFSOCK|0644, 0) >= 0); + + assert_se(copy_tree(original_dir, copy_dir, UID_INVALID, GID_INVALID, COPY_REFLINK|COPY_MERGE|COPY_HARDLINKS) == 0); + + STRV_FOREACH(p, files) { + _cleanup_free_ char *buf, *f, *c = NULL; + size_t sz; + int k; + + assert_se(f = path_join(copy_dir, *p)); + + assert_se(access(f, F_OK) == 0); + assert_se(read_full_file(f, &buf, &sz) == 0); + assert_se(streq(buf, "file\n")); + + k = getxattr_malloc(f, "user.testxattr", &c, false); + assert_se(xattr_worked < 0 || ((k >= 0) == !!xattr_worked)); + + if (k >= 0) { + _cleanup_free_ char *d = NULL; + + assert_se(base64mem(*p, strlen(*p), &d) >= 0); + assert_se(streq(d, c)); + } + } + + STRV_FOREACH_PAIR(ll, p, symlinks) { + _cleanup_free_ char *target, *f, *l; + + assert_se(f = strjoin(original_dir, *p)); + assert_se(l = strjoin(copy_dir, *ll)); + + assert_se(chase_symlinks(l, NULL, 0, &target, NULL) == 1); + assert_se(path_equal(f, target)); + } + + STRV_FOREACH_PAIR(ll, p, hardlinks) { + _cleanup_free_ char *f, *l; + struct stat a, b; + + assert_se(f = strjoin(copy_dir, *p)); + assert_se(l = strjoin(copy_dir, *ll)); + + assert_se(lstat(f, &a) >= 0); + assert_se(lstat(l, &b) >= 0); + + assert_se(a.st_ino == b.st_ino); + assert_se(a.st_dev == b.st_dev); + } + + unixsockp = strjoina(copy_dir, "unixsock"); + assert_se(stat(unixsockp, &st) >= 0); + assert_se(S_ISSOCK(st.st_mode)); + + assert_se(copy_tree(original_dir, copy_dir, UID_INVALID, GID_INVALID, COPY_REFLINK) < 0); + assert_se(copy_tree("/tmp/inexistent/foo/bar/fsdoi", copy_dir, UID_INVALID, GID_INVALID, COPY_REFLINK) < 0); + + (void) rm_rf(copy_dir, REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf(original_dir, REMOVE_ROOT|REMOVE_PHYSICAL); +} + +static void test_copy_bytes(void) { + _cleanup_close_pair_ int pipefd[2] = {-1, -1}; + _cleanup_close_ int infd = -1; + int r, r2; + char buf[1024], buf2[1024]; + + infd = open("/usr/lib/os-release", O_RDONLY|O_CLOEXEC); + if (infd < 0) + infd = open("/etc/os-release", O_RDONLY|O_CLOEXEC); + assert_se(infd >= 0); + + assert_se(pipe2(pipefd, O_CLOEXEC) == 0); + + r = copy_bytes(infd, pipefd[1], (uint64_t) -1, 0); + assert_se(r == 0); + + r = read(pipefd[0], buf, sizeof(buf)); + assert_se(r >= 0); + + assert_se(lseek(infd, 0, SEEK_SET) == 0); + r2 = read(infd, buf2, sizeof(buf2)); + assert_se(r == r2); + + assert_se(strneq(buf, buf2, r)); + + /* test copy_bytes with invalid descriptors */ + r = copy_bytes(pipefd[0], pipefd[0], 1, 0); + assert_se(r == -EBADF); + + r = copy_bytes(pipefd[1], pipefd[1], 1, 0); + assert_se(r == -EBADF); + + r = copy_bytes(pipefd[1], infd, 1, 0); + assert_se(r == -EBADF); +} + +static void test_copy_bytes_regular_file(const char *src, bool try_reflink, uint64_t max_bytes) { + char fn2[] = "/tmp/test-copy-file-XXXXXX"; + char fn3[] = "/tmp/test-copy-file-XXXXXX"; + _cleanup_close_ int fd = -1, fd2 = -1, fd3 = -1; + int r; + struct stat buf, buf2, buf3; + + log_info("%s try_reflink=%s max_bytes=%" PRIu64, __func__, yes_no(try_reflink), max_bytes); + + fd = open(src, O_RDONLY | O_CLOEXEC | O_NOCTTY); + assert_se(fd >= 0); + + fd2 = mkostemp_safe(fn2); + assert_se(fd2 >= 0); + + fd3 = mkostemp_safe(fn3); + assert_se(fd3 >= 0); + + r = copy_bytes(fd, fd2, max_bytes, try_reflink ? COPY_REFLINK : 0); + if (max_bytes == (uint64_t) -1) + assert_se(r == 0); + else + assert_se(IN_SET(r, 0, 1)); + + assert_se(fstat(fd, &buf) == 0); + assert_se(fstat(fd2, &buf2) == 0); + assert_se((uint64_t) buf2.st_size == MIN((uint64_t) buf.st_size, max_bytes)); + + if (max_bytes < (uint64_t) -1) + /* Make sure the file is now higher than max_bytes */ + assert_se(ftruncate(fd2, max_bytes + 1) == 0); + + assert_se(lseek(fd2, 0, SEEK_SET) == 0); + + r = copy_bytes(fd2, fd3, max_bytes, try_reflink ? COPY_REFLINK : 0); + if (max_bytes == (uint64_t) -1) + assert_se(r == 0); + else + /* We cannot distinguish between the input being exactly max_bytes + * or longer than max_bytes (without trying to read one more byte, + * or calling stat, or FION_READ, etc, and we don't want to do any + * of that). So we expect "truncation" since we know that file we + * are copying is exactly max_bytes bytes. */ + assert_se(r == 1); + + assert_se(fstat(fd3, &buf3) == 0); + + if (max_bytes == (uint64_t) -1) + assert_se(buf3.st_size == buf2.st_size); + else + assert_se((uint64_t) buf3.st_size == max_bytes); + + unlink(fn2); + unlink(fn3); +} + +static void test_copy_atomic(void) { + _cleanup_(rm_rf_physical_and_freep) char *p = NULL; + const char *q; + int r; + + assert_se(mkdtemp_malloc(NULL, &p) >= 0); + + q = strjoina(p, "/fstab"); + + r = copy_file_atomic("/etc/fstab", q, 0644, 0, 0, COPY_REFLINK); + if (r == -ENOENT || ERRNO_IS_PRIVILEGE(r)) + return; + + assert_se(copy_file_atomic("/etc/fstab", q, 0644, 0, 0, COPY_REFLINK) == -EEXIST); + + assert_se(copy_file_atomic("/etc/fstab", q, 0644, 0, 0, COPY_REPLACE) >= 0); +} + +int main(int argc, char *argv[]) { + test_setup_logging(LOG_DEBUG); + + test_copy_file(); + test_copy_file_fd(); + test_copy_tree(); + test_copy_bytes(); + test_copy_bytes_regular_file(argv[0], false, (uint64_t) -1); + test_copy_bytes_regular_file(argv[0], true, (uint64_t) -1); + test_copy_bytes_regular_file(argv[0], false, 1000); /* smaller than copy buffer size */ + test_copy_bytes_regular_file(argv[0], true, 1000); + test_copy_bytes_regular_file(argv[0], false, 32000); /* larger than copy buffer size */ + test_copy_bytes_regular_file(argv[0], true, 32000); + test_copy_atomic(); + + return 0; +} |