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Diffstat (limited to '')
| -rw-r--r-- | tests/util/link.c | 630 |
1 files changed, 630 insertions, 0 deletions
diff --git a/tests/util/link.c b/tests/util/link.c new file mode 100644 index 0000000..5909e26 --- /dev/null +++ b/tests/util/link.c @@ -0,0 +1,630 @@ +#include "clar_libgit2.h" +#include "posix.h" + +#ifdef GIT_WIN32 +# include "win32/reparse.h" +#endif + +void test_link__cleanup(void) +{ +#ifdef GIT_WIN32 + RemoveDirectory("lstat_junction"); + RemoveDirectory("lstat_dangling"); + RemoveDirectory("lstat_dangling_dir"); + RemoveDirectory("lstat_dangling_junction"); + + RemoveDirectory("stat_junction"); + RemoveDirectory("stat_dangling"); + RemoveDirectory("stat_dangling_dir"); + RemoveDirectory("stat_dangling_junction"); +#endif +} + +#ifdef GIT_WIN32 +static bool should_run(void) +{ + static SID_IDENTIFIER_AUTHORITY authority = { SECURITY_NT_AUTHORITY }; + PSID admin_sid; + BOOL is_admin; + + cl_win32_pass(AllocateAndInitializeSid(&authority, 2, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS, 0, 0, 0, 0, 0, 0, &admin_sid)); + cl_win32_pass(CheckTokenMembership(NULL, admin_sid, &is_admin)); + FreeSid(admin_sid); + + return is_admin ? true : false; +} +#else +static bool should_run(void) +{ + return true; +} +#endif + +static void do_symlink(const char *old, const char *new, int is_dir) +{ +#ifndef GIT_WIN32 + GIT_UNUSED(is_dir); + + cl_must_pass(symlink(old, new)); +#else + typedef DWORD (WINAPI *create_symlink_func)(LPCTSTR, LPCTSTR, DWORD); + HMODULE module; + create_symlink_func pCreateSymbolicLink; + + cl_assert(module = GetModuleHandle("kernel32")); + cl_assert(pCreateSymbolicLink = (create_symlink_func)(void *)GetProcAddress(module, "CreateSymbolicLinkA")); + + cl_win32_pass(pCreateSymbolicLink(new, old, is_dir)); +#endif +} + +static void do_hardlink(const char *old, const char *new) +{ +#ifndef GIT_WIN32 + cl_must_pass(link(old, new)); +#else + typedef DWORD (WINAPI *create_hardlink_func)(LPCTSTR, LPCTSTR, LPSECURITY_ATTRIBUTES); + HMODULE module; + create_hardlink_func pCreateHardLink; + + cl_assert(module = GetModuleHandle("kernel32")); + cl_assert(pCreateHardLink = (create_hardlink_func)(void *)GetProcAddress(module, "CreateHardLinkA")); + + cl_win32_pass(pCreateHardLink(new, old, 0)); +#endif +} + +#ifdef GIT_WIN32 + +static void do_junction(const char *old, const char *new) +{ + GIT_REPARSE_DATA_BUFFER *reparse_buf; + HANDLE handle; + git_str unparsed_buf = GIT_STR_INIT; + wchar_t *subst_utf16, *print_utf16; + DWORD ioctl_ret; + int subst_utf16_len, subst_byte_len, print_utf16_len, print_byte_len, ret; + USHORT reparse_buflen; + size_t i; + + /* Junction targets must be the unparsed name, starting with \??\, using + * backslashes instead of forward, and end in a trailing backslash. + * eg: \??\C:\Foo\ + */ + git_str_puts(&unparsed_buf, "\\??\\"); + + for (i = 0; i < strlen(old); i++) + git_str_putc(&unparsed_buf, old[i] == '/' ? '\\' : old[i]); + + git_str_putc(&unparsed_buf, '\\'); + + subst_utf16_len = git_utf8_to_16(NULL, 0, git_str_cstr(&unparsed_buf)); + subst_byte_len = subst_utf16_len * sizeof(WCHAR); + + print_utf16_len = subst_utf16_len - 4; + print_byte_len = subst_byte_len - (4 * sizeof(WCHAR)); + + /* The junction must be an empty directory before the junction attribute + * can be added. + */ + cl_win32_pass(CreateDirectoryA(new, NULL)); + + handle = CreateFileA(new, GENERIC_WRITE, 0, NULL, OPEN_EXISTING, + FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS, NULL); + cl_win32_pass(handle != INVALID_HANDLE_VALUE); + + reparse_buflen = (USHORT)(REPARSE_DATA_HEADER_SIZE + + REPARSE_DATA_MOUNTPOINT_HEADER_SIZE + + subst_byte_len + sizeof(WCHAR) + + print_byte_len + sizeof(WCHAR)); + + reparse_buf = LocalAlloc(LMEM_FIXED|LMEM_ZEROINIT, reparse_buflen); + cl_assert(reparse_buf); + + subst_utf16 = reparse_buf->ReparseBuffer.MountPoint.PathBuffer; + print_utf16 = subst_utf16 + subst_utf16_len + 1; + + ret = git_utf8_to_16(subst_utf16, subst_utf16_len + 1, + git_str_cstr(&unparsed_buf)); + cl_assert_equal_i(subst_utf16_len, ret); + + ret = git_utf8_to_16(print_utf16, + print_utf16_len + 1, git_str_cstr(&unparsed_buf) + 4); + cl_assert_equal_i(print_utf16_len, ret); + + reparse_buf->ReparseTag = IO_REPARSE_TAG_MOUNT_POINT; + reparse_buf->ReparseBuffer.MountPoint.SubstituteNameOffset = 0; + reparse_buf->ReparseBuffer.MountPoint.SubstituteNameLength = subst_byte_len; + reparse_buf->ReparseBuffer.MountPoint.PrintNameOffset = (USHORT)(subst_byte_len + sizeof(WCHAR)); + reparse_buf->ReparseBuffer.MountPoint.PrintNameLength = print_byte_len; + reparse_buf->ReparseDataLength = reparse_buflen - REPARSE_DATA_HEADER_SIZE; + + cl_win32_pass(DeviceIoControl(handle, FSCTL_SET_REPARSE_POINT, + reparse_buf, reparse_buflen, NULL, 0, &ioctl_ret, NULL)); + + CloseHandle(handle); + LocalFree(reparse_buf); + + git_str_dispose(&unparsed_buf); +} + +static void do_custom_reparse(const char *path) +{ + REPARSE_GUID_DATA_BUFFER *reparse_buf; + HANDLE handle; + DWORD ioctl_ret; + + const char *reparse_data = "Reparse points are silly."; + size_t reparse_buflen = REPARSE_GUID_DATA_BUFFER_HEADER_SIZE + + strlen(reparse_data) + 1; + + reparse_buf = LocalAlloc(LMEM_FIXED|LMEM_ZEROINIT, reparse_buflen); + cl_assert(reparse_buf); + + reparse_buf->ReparseTag = 42; + reparse_buf->ReparseDataLength = (WORD)(strlen(reparse_data) + 1); + + reparse_buf->ReparseGuid.Data1 = 0xdeadbeef; + reparse_buf->ReparseGuid.Data2 = 0xdead; + reparse_buf->ReparseGuid.Data3 = 0xbeef; + reparse_buf->ReparseGuid.Data4[0] = 42; + reparse_buf->ReparseGuid.Data4[1] = 42; + reparse_buf->ReparseGuid.Data4[2] = 42; + reparse_buf->ReparseGuid.Data4[3] = 42; + reparse_buf->ReparseGuid.Data4[4] = 42; + reparse_buf->ReparseGuid.Data4[5] = 42; + reparse_buf->ReparseGuid.Data4[6] = 42; + reparse_buf->ReparseGuid.Data4[7] = 42; + reparse_buf->ReparseGuid.Data4[8] = 42; + + memcpy(reparse_buf->GenericReparseBuffer.DataBuffer, + reparse_data, strlen(reparse_data) + 1); + + handle = CreateFileA(path, GENERIC_WRITE, 0, NULL, OPEN_EXISTING, + FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS, NULL); + cl_win32_pass(handle != INVALID_HANDLE_VALUE); + + cl_win32_pass(DeviceIoControl(handle, FSCTL_SET_REPARSE_POINT, + reparse_buf, + reparse_buf->ReparseDataLength + REPARSE_GUID_DATA_BUFFER_HEADER_SIZE, + NULL, 0, &ioctl_ret, NULL)); + + CloseHandle(handle); + LocalFree(reparse_buf); +} + +#endif + +void test_link__stat_regular_file(void) +{ + struct stat st; + + cl_git_rewritefile("stat_regfile", "This is a regular file!\n"); + + cl_must_pass(p_stat("stat_regfile", &st)); + cl_assert(S_ISREG(st.st_mode)); + cl_assert_equal_i(24, st.st_size); +} + +void test_link__lstat_regular_file(void) +{ + struct stat st; + + cl_git_rewritefile("lstat_regfile", "This is a regular file!\n"); + + cl_must_pass(p_stat("lstat_regfile", &st)); + cl_assert(S_ISREG(st.st_mode)); + cl_assert_equal_i(24, st.st_size); +} + +void test_link__stat_symlink(void) +{ + struct stat st; + + if (!should_run()) + clar__skip(); + + cl_git_rewritefile("stat_target", "This is the target of a symbolic link.\n"); + do_symlink("stat_target", "stat_symlink", 0); + + cl_must_pass(p_stat("stat_target", &st)); + cl_assert(S_ISREG(st.st_mode)); + cl_assert_equal_i(39, st.st_size); + + cl_must_pass(p_stat("stat_symlink", &st)); + cl_assert(S_ISREG(st.st_mode)); + cl_assert_equal_i(39, st.st_size); +} + +void test_link__stat_symlink_directory(void) +{ + struct stat st; + + if (!should_run()) + clar__skip(); + + p_mkdir("stat_dirtarget", 0777); + do_symlink("stat_dirtarget", "stat_dirlink", 1); + + cl_must_pass(p_stat("stat_dirtarget", &st)); + cl_assert(S_ISDIR(st.st_mode)); + + cl_must_pass(p_stat("stat_dirlink", &st)); + cl_assert(S_ISDIR(st.st_mode)); +} + +void test_link__stat_symlink_chain(void) +{ + struct stat st; + + if (!should_run()) + clar__skip(); + + cl_git_rewritefile("stat_final_target", "Final target of some symbolic links...\n"); + do_symlink("stat_final_target", "stat_chain_3", 0); + do_symlink("stat_chain_3", "stat_chain_2", 0); + do_symlink("stat_chain_2", "stat_chain_1", 0); + + cl_must_pass(p_stat("stat_chain_1", &st)); + cl_assert(S_ISREG(st.st_mode)); + cl_assert_equal_i(39, st.st_size); +} + +void test_link__stat_dangling_symlink(void) +{ + struct stat st; + + if (!should_run()) + clar__skip(); + + do_symlink("stat_nonexistent", "stat_dangling", 0); + + cl_must_fail(p_stat("stat_nonexistent", &st)); + cl_must_fail(p_stat("stat_dangling", &st)); +} + +void test_link__stat_dangling_symlink_directory(void) +{ + struct stat st; + + if (!should_run()) + clar__skip(); + + do_symlink("stat_nonexistent", "stat_dangling_dir", 1); + + cl_must_fail(p_stat("stat_nonexistent_dir", &st)); + cl_must_fail(p_stat("stat_dangling", &st)); +} + +void test_link__lstat_symlink(void) +{ + git_str target_path = GIT_STR_INIT; + struct stat st; + + if (!should_run()) + clar__skip(); + + /* Windows always writes the canonical path as the link target, so + * write the full path on all platforms. + */ + git_str_join(&target_path, '/', clar_sandbox_path(), "lstat_target"); + + cl_git_rewritefile("lstat_target", "This is the target of a symbolic link.\n"); + do_symlink(git_str_cstr(&target_path), "lstat_symlink", 0); + + cl_must_pass(p_lstat("lstat_target", &st)); + cl_assert(S_ISREG(st.st_mode)); + cl_assert_equal_i(39, st.st_size); + + cl_must_pass(p_lstat("lstat_symlink", &st)); + cl_assert(S_ISLNK(st.st_mode)); + cl_assert_equal_i(git_str_len(&target_path), st.st_size); + + git_str_dispose(&target_path); +} + +void test_link__lstat_symlink_directory(void) +{ + git_str target_path = GIT_STR_INIT; + struct stat st; + + if (!should_run()) + clar__skip(); + + git_str_join(&target_path, '/', clar_sandbox_path(), "lstat_dirtarget"); + + p_mkdir("lstat_dirtarget", 0777); + do_symlink(git_str_cstr(&target_path), "lstat_dirlink", 1); + + cl_must_pass(p_lstat("lstat_dirtarget", &st)); + cl_assert(S_ISDIR(st.st_mode)); + + cl_must_pass(p_lstat("lstat_dirlink", &st)); + cl_assert(S_ISLNK(st.st_mode)); + cl_assert_equal_i(git_str_len(&target_path), st.st_size); + + git_str_dispose(&target_path); +} + +void test_link__lstat_dangling_symlink(void) +{ + struct stat st; + + if (!should_run()) + clar__skip(); + + do_symlink("lstat_nonexistent", "lstat_dangling", 0); + + cl_must_fail(p_lstat("lstat_nonexistent", &st)); + + cl_must_pass(p_lstat("lstat_dangling", &st)); + cl_assert(S_ISLNK(st.st_mode)); + cl_assert_equal_i(strlen("lstat_nonexistent"), st.st_size); +} + +void test_link__lstat_dangling_symlink_directory(void) +{ + struct stat st; + + if (!should_run()) + clar__skip(); + + do_symlink("lstat_nonexistent", "lstat_dangling_dir", 1); + + cl_must_fail(p_lstat("lstat_nonexistent", &st)); + + cl_must_pass(p_lstat("lstat_dangling_dir", &st)); + cl_assert(S_ISLNK(st.st_mode)); + cl_assert_equal_i(strlen("lstat_nonexistent"), st.st_size); +} + +void test_link__stat_junction(void) +{ +#ifdef GIT_WIN32 + git_str target_path = GIT_STR_INIT; + struct stat st; + + git_str_join(&target_path, '/', clar_sandbox_path(), "stat_junctarget"); + + p_mkdir("stat_junctarget", 0777); + do_junction(git_str_cstr(&target_path), "stat_junction"); + + cl_must_pass(p_stat("stat_junctarget", &st)); + cl_assert(S_ISDIR(st.st_mode)); + + cl_must_pass(p_stat("stat_junction", &st)); + cl_assert(S_ISDIR(st.st_mode)); + + git_str_dispose(&target_path); +#endif +} + +void test_link__stat_dangling_junction(void) +{ +#ifdef GIT_WIN32 + git_str target_path = GIT_STR_INIT; + struct stat st; + + git_str_join(&target_path, '/', clar_sandbox_path(), "stat_nonexistent_junctarget"); + + p_mkdir("stat_nonexistent_junctarget", 0777); + do_junction(git_str_cstr(&target_path), "stat_dangling_junction"); + + RemoveDirectory("stat_nonexistent_junctarget"); + + cl_must_fail(p_stat("stat_nonexistent_junctarget", &st)); + cl_must_fail(p_stat("stat_dangling_junction", &st)); + + git_str_dispose(&target_path); +#endif +} + +void test_link__lstat_junction(void) +{ +#ifdef GIT_WIN32 + git_str target_path = GIT_STR_INIT; + struct stat st; + + git_str_join(&target_path, '/', clar_sandbox_path(), "lstat_junctarget"); + + p_mkdir("lstat_junctarget", 0777); + do_junction(git_str_cstr(&target_path), "lstat_junction"); + + cl_must_pass(p_lstat("lstat_junctarget", &st)); + cl_assert(S_ISDIR(st.st_mode)); + + cl_must_pass(p_lstat("lstat_junction", &st)); + cl_assert(S_ISLNK(st.st_mode)); + + git_str_dispose(&target_path); +#endif +} + +void test_link__lstat_dangling_junction(void) +{ +#ifdef GIT_WIN32 + git_str target_path = GIT_STR_INIT; + struct stat st; + + git_str_join(&target_path, '/', clar_sandbox_path(), "lstat_nonexistent_junctarget"); + + p_mkdir("lstat_nonexistent_junctarget", 0777); + do_junction(git_str_cstr(&target_path), "lstat_dangling_junction"); + + RemoveDirectory("lstat_nonexistent_junctarget"); + + cl_must_fail(p_lstat("lstat_nonexistent_junctarget", &st)); + + cl_must_pass(p_lstat("lstat_dangling_junction", &st)); + cl_assert(S_ISLNK(st.st_mode)); + cl_assert_equal_i(git_str_len(&target_path), st.st_size); + + git_str_dispose(&target_path); +#endif +} + +void test_link__stat_hardlink(void) +{ + struct stat st; + + if (!should_run()) + clar__skip(); + + cl_git_rewritefile("stat_hardlink1", "This file has many names!\n"); + do_hardlink("stat_hardlink1", "stat_hardlink2"); + + cl_must_pass(p_stat("stat_hardlink1", &st)); + cl_assert(S_ISREG(st.st_mode)); + cl_assert_equal_i(26, st.st_size); + + cl_must_pass(p_stat("stat_hardlink2", &st)); + cl_assert(S_ISREG(st.st_mode)); + cl_assert_equal_i(26, st.st_size); +} + +void test_link__lstat_hardlink(void) +{ + struct stat st; + + if (!should_run()) + clar__skip(); + + cl_git_rewritefile("lstat_hardlink1", "This file has many names!\n"); + do_hardlink("lstat_hardlink1", "lstat_hardlink2"); + + cl_must_pass(p_lstat("lstat_hardlink1", &st)); + cl_assert(S_ISREG(st.st_mode)); + cl_assert_equal_i(26, st.st_size); + + cl_must_pass(p_lstat("lstat_hardlink2", &st)); + cl_assert(S_ISREG(st.st_mode)); + cl_assert_equal_i(26, st.st_size); +} + +void test_link__stat_reparse_point(void) +{ +#ifdef GIT_WIN32 + struct stat st; + + /* Generic reparse points should be treated as regular files, only + * symlinks and junctions should be treated as links. + */ + + cl_git_rewritefile("stat_reparse", "This is a reparse point!\n"); + do_custom_reparse("stat_reparse"); + + cl_must_pass(p_lstat("stat_reparse", &st)); + cl_assert(S_ISREG(st.st_mode)); + cl_assert_equal_i(25, st.st_size); +#endif +} + +void test_link__lstat_reparse_point(void) +{ +#ifdef GIT_WIN32 + struct stat st; + + cl_git_rewritefile("lstat_reparse", "This is a reparse point!\n"); + do_custom_reparse("lstat_reparse"); + + cl_must_pass(p_lstat("lstat_reparse", &st)); + cl_assert(S_ISREG(st.st_mode)); + cl_assert_equal_i(25, st.st_size); +#endif +} + +void test_link__readlink_nonexistent_file(void) +{ + char buf[2048]; + + cl_must_fail(p_readlink("readlink_nonexistent", buf, 2048)); + cl_assert_equal_i(ENOENT, errno); +} + +void test_link__readlink_normal_file(void) +{ + char buf[2048]; + + cl_git_rewritefile("readlink_regfile", "This is a regular file!\n"); + cl_must_fail(p_readlink("readlink_regfile", buf, 2048)); + cl_assert_equal_i(EINVAL, errno); +} + +void test_link__readlink_symlink(void) +{ + git_str target_path = GIT_STR_INIT; + int len; + char buf[2048]; + + if (!should_run()) + clar__skip(); + + git_str_join(&target_path, '/', clar_sandbox_path(), "readlink_target"); + + cl_git_rewritefile("readlink_target", "This is the target of a symlink\n"); + do_symlink(git_str_cstr(&target_path), "readlink_link", 0); + + len = p_readlink("readlink_link", buf, 2048); + cl_must_pass(len); + + buf[len] = 0; + + cl_assert_equal_s(git_str_cstr(&target_path), buf); + + git_str_dispose(&target_path); +} + +void test_link__readlink_dangling(void) +{ + git_str target_path = GIT_STR_INIT; + int len; + char buf[2048]; + + if (!should_run()) + clar__skip(); + + git_str_join(&target_path, '/', clar_sandbox_path(), "readlink_nonexistent"); + + do_symlink(git_str_cstr(&target_path), "readlink_dangling", 0); + + len = p_readlink("readlink_dangling", buf, 2048); + cl_must_pass(len); + + buf[len] = 0; + + cl_assert_equal_s(git_str_cstr(&target_path), buf); + + git_str_dispose(&target_path); +} + +void test_link__readlink_multiple(void) +{ + git_str target_path = GIT_STR_INIT, + path3 = GIT_STR_INIT, path2 = GIT_STR_INIT, path1 = GIT_STR_INIT; + int len; + char buf[2048]; + + if (!should_run()) + clar__skip(); + + git_str_join(&target_path, '/', clar_sandbox_path(), "readlink_final"); + git_str_join(&path3, '/', clar_sandbox_path(), "readlink_3"); + git_str_join(&path2, '/', clar_sandbox_path(), "readlink_2"); + git_str_join(&path1, '/', clar_sandbox_path(), "readlink_1"); + + do_symlink(git_str_cstr(&target_path), git_str_cstr(&path3), 0); + do_symlink(git_str_cstr(&path3), git_str_cstr(&path2), 0); + do_symlink(git_str_cstr(&path2), git_str_cstr(&path1), 0); + + len = p_readlink("readlink_1", buf, 2048); + cl_must_pass(len); + + buf[len] = 0; + + cl_assert_equal_s(git_str_cstr(&path2), buf); + + git_str_dispose(&path1); + git_str_dispose(&path2); + git_str_dispose(&path3); + git_str_dispose(&target_path); +} |