From: Daira Hopwood Date: Tue, 28 Oct 2014 01:39:25 +0000 (+0000) Subject: WIP. X-Git-Url: https://git.rkrishnan.org/pf/content/quickstart.html?a=commitdiff_plain;h=adc53ab3b62b4cd6f7f5074e07453fe34f952131;p=tahoe-lafs%2Ftahoe-lafs.git WIP. Signed-off-by: Daira Hopwood --- diff --git a/misc/build_helpers/windows/installer/installer/installer.cpp b/misc/build_helpers/windows/installer/installer/installer.cpp index 8cd9c10a..98d0bd47 100644 --- a/misc/build_helpers/windows/installer/installer/installer.cpp +++ b/misc/build_helpers/windows/installer/installer/installer.cpp @@ -5,6 +5,8 @@ #include #include #include +#include +#include // Turn off the warnings nagging you to use the more complicated *_s // "secure" functions that are actually more difficult to use securely. @@ -25,10 +27,11 @@ size_t read_uint32_le(unsigned char *b); void unzip(wchar_t *zip_path, wchar_t *destination_dir); bool have_acceptable_python(); void install_python(wchar_t *python_installer_dir); -void execute(wchar_t *command, wchar_t *arguments, wchar_t *stdout_buf, size_t stdout_size); +bool spawn_with_redirected_stdout(unsigned char *stdout_buf, size_t stdout_size, const wchar_t *argv[]); #define fail_unless(x, s) if (!(x)) { fail(s); } void fail(char *s); +void warn(char *s); #define MINIMUM_PYTHON_VERSION L"2.7.0" #define INSTALL_PYTHON_VERSION L"2.7.8" @@ -53,12 +56,9 @@ int wmain(int argc, wchar_t *argv[]) { initialize_com(); self_extract(destination_dir); - //unzip(L"C:\\tahoe\\allmydata-tahoe-1.10.0c1.zip", destination_dir); - if (!have_acceptable_python()) { - install_python(destination_dir); - } - //unlink(python_installer); + install_python(destination_dir); + return 0; } @@ -68,13 +68,6 @@ wchar_t * get_default_destination_dir() { } void initialize_com() { - // CoInitializeEx: - HRESULT res = CoInitializeEx(NULL, 0); - fail_unless(res == S_OK || res == S_FALSE, "Could not initialize COM."); - - // Despite what the documentation says, we don't need to call CoUninitialize because - // any resources will be cleaned up on process exit, and there will be no pending COM - // messages at that point. } void self_extract(wchar_t *destination_dir) { @@ -141,6 +134,7 @@ void unzip_from_executable(wchar_t *executable_path, wchar_t *destination_dir) { __int64 zip_length = (__int64) cd_offset + cd_length + sizeof_eocd; fail_unless(zip_length <= 0x7FFFFFFFi64, "Cannot copy a zip file >= 2 GiB."); + fseek(f, -(off_t) zip_length, SEEK_END); fail_unless(errno == 0 && ferror(f) == 0, "Could not seek to start of embedded zip file."); @@ -156,12 +150,13 @@ void unzip_from_executable(wchar_t *executable_path, wchar_t *destination_dir) { // to be deleted even if we exit suddenly. In order to reliably flush writes but also // ensure that the temporary file isn't deleted too soon, we duplicate the file handle // while the file is being unzipped. + errno = 0; FILE *tmp_file = _wfopen(tmp_path, L"wbTD"); fail_unless(tmp_file != NULL && errno == 0 && ferror(f) == 0, "Could not open temporary zip file."); int tmp_file_keepopen = _dup(_fileno(tmp_file)); - fail_unless(errno == 0, "Could not duplicate file handle for temporary zip file."); + fail_unless(errno == 0, "Could not duplicate file descriptor for temporary zip file."); unsigned char buf[16384]; size_t remaining_length = (size_t) zip_length; @@ -195,6 +190,10 @@ void unzip(wchar_t *zip_path, wchar_t *destination_dir) { // Based loosely on // . + // CoInitializeEx: + HRESULT res = CoInitializeEx(NULL, 0); + fail_unless(res == S_OK || res == S_FALSE, "Could not initialize COM."); + // SysAllocString: // BSTR: @@ -210,7 +209,7 @@ void unzip(wchar_t *zip_path, wchar_t *destination_dir) { // CoCreateInstance: IShellDispatch *shell; - HRESULT res = CoCreateInstance(CLSID_Shell, NULL, CLSCTX_INPROC_SERVER, IID_IShellDispatch, (void **) &shell); + res = CoCreateInstance(CLSID_Shell, NULL, CLSCTX_INPROC_SERVER, IID_IShellDispatch, (void **) &shell); fail_unless(res == S_OK, "Could not create Shell instance."); // Folder.NameSpace: @@ -255,19 +254,26 @@ void unzip(wchar_t *zip_path, wchar_t *destination_dir) { destination_folder->Release(); zip_folder->Release(); shell->Release(); + + // CoUninitialize: + CoUninitialize(); } -bool have_acceptable_python() { +void install_python() { printf("Checking for Python 2.7..."); - // SearchPathW: - +/* wchar_t python_exe_path[MAX_PATH]; DWORD res = SearchPathW(NULL, L"python.exe", NULL, MAX_PATH, python_exe_path, NULL); if (res == 0 || res >= MAX_PATH) { return false; } - //execute(python_exe_path, L"--version"); - //execute(python_exe_path, L"setup.py scriptsetup --allusers"); + errno = 0; + + + HANDLE hProcess = (HANDLE) _wspawnlp(P_NOWAIT, L"python", L"-V"); + if (exitcode != 0 || errno != 0) return false; + _cwait(...) + HKEY environment_key; if (RegOpenKeyExW(HKEY_CURRENT_USER, L"Environment", @@ -280,10 +286,95 @@ bool have_acceptable_python() { } return false; +*/ } -void execute(wchar_t *command, wchar_t *arguments, wchar_t *stdout_buf, size_t stdout_size) { - CreateProcessW(command, arguments, NULL, NULL, FALSE, 0, NULL, NULL, NULL, NULL); +void scriptsetup() { + unsigned char stdout_buf[1024]; + const wchar_t *argv[] = { L"python", L"setup.py", L"scriptsetup", L"--allusers", NULL }; + spawn_with_redirected_stdout(stdout_buf, sizeof(stdout_buf), &argv[0]); + //if (exitcode != 0 || errno != 0) return false; +} + +bool spawn_with_redirected_stdout(unsigned char *stdout_buf, size_t stdout_size, const wchar_t *argv[]) { + bool result = false; + fail_unless(stdout_size > 0, "Invalid stdout_size."); + stdout_buf[0] = 0; + + // Redirecting stdout is annoyingly complicated. + int output_pipe[2]; + errno = 0; + int res = _pipe(output_pipe, 512, _O_BINARY | _O_NOINHERIT); + if (res != 0) { + warn("Could not create pipe."); + return false; + } + int output_read_fd = output_pipe[0], output_write_fd = output_pipe[1]; + + // Duplicate stdout file descriptor (the call to _dup2 will close the original). + int original_stdout_fd = _dup(_fileno(stdout)); + if (errno != 0) { + warn("Could not duplicate original stdout file descriptor."); + return false; + } + + // Duplicate write end of pipe to stdout file descriptor. + res = _dup2(output_write_fd, _fileno(stdout)); + if (res != 0 || errno != 0) { + warn("Could not redirect stdout."); + return false; + } + + // Close original file descriptor for write end of pipe. + _close(output_write_fd); // ignore errors + + HANDLE process_handle = (HANDLE) _wspawnvp(P_NOWAIT, argv[0], argv); + if (process_handle == (HANDLE) -1) { + warn("Could not execute subprocess."); + } + + // Duplicate copy of original stdout back into stdout. + errno = 0; + res = _dup2(original_stdout_fd, _fileno(stdout)); + fail_unless(res == 0 && errno == 0, "Could not restore stdout."); + + // Close duplicate copy of original stdout. + _close(original_stdout_fd); // ignore errors + + if (process_handle == (HANDLE) -1) { + return false; + } + + DWORD exit_code = 0; + errno = 0; + unsigned char *p = stdout_buf; + size_t remaining_size = stdout_size; + int bytes_read; + do { + if (remaining_size == 0) { + bytes_read = 0; + Sleep(100); + } else { + bytes_read = _read(output_read_fd, p, remaining_size-1); + if (errno != 0 || bytes_read < 0) { + warn("Could not read from subprocess stdout."); + return false; + } + fail_unless((size_t) bytes_read < stdout_size, "Unexpectedly long read."); + p += bytes_read; + remaining_size -= bytes_read; + *p = 0; + } + + // GetExitCodeProcess: + BOOL res = GetExitCodeProcess(process_handle, &exit_code); + if (!res) { + warn("Could not get subprocess exit code."); + return false; + } + } while (bytes_read > 0 && exit_code == STILL_ACTIVE); + + return (exit_code == 0); } void install_python(wchar_t *python_installer_dir) { @@ -313,6 +404,10 @@ void install_python(wchar_t *python_installer_dir) { void fail(char *s) { // TODO: show dialog box - puts(s); + fputs(s, stderr); exit(1); } + +void warn(char *s) { + fputs(s, stderr); +} \ No newline at end of file