adb: create unix_isatty() function. (c5b8ad88) · Commits · e / os / android_system_core

adb/adb_trace.cpp

+1 −1

Original line number	Diff line number	Diff line
		@@ -157,7 +157,7 @@ void adb_trace_init(char** argv) {
		// Don't open log file if no tracing, since this will block
		// the crypto unmount of /data
		if (!get_trace_setting().empty()) {
		if (isatty(STDOUT_FILENO) == 0) {
		if (unix_isatty(STDOUT_FILENO) == 0) {
		start_device_log();
		}
		}

adb/commandline.cpp

+2 −2

Original line number	Diff line number	Diff line
		@@ -1388,12 +1388,12 @@ int adb_commandline(int argc, const char **argv) {
		// things like `adb shell < my_script.sh` work as expected.
		// Otherwise leave \|shell_type_arg\| blank which uses PTY for
		// interactive shells and raw for non-interactive.
		if (!isatty(STDIN_FILENO)) {
		if (!unix_isatty(STDIN_FILENO)) {
		shell_type_arg = kShellServiceArgRaw;
		}
		} else if (t_arg_count == 1) {
		// A single -t arg isn't enough to override implicit -T.
		if (!isatty(STDIN_FILENO)) {
		if (!unix_isatty(STDIN_FILENO)) {
		fprintf(stderr,
		"Remote PTY will not be allocated because stdin is not a terminal.\n"
		"Use multiple -t options to force remote PTY allocation.\n");

adb/line_printer.cpp

+1 −1

Original line number	Diff line number	Diff line
		@@ -46,7 +46,7 @@ string ElideMiddle(const string& str, size_t width) {
		LinePrinter::LinePrinter() : have_blank_line_(true), console_locked_(false) {
		#ifndef _WIN32
		const char* term = getenv("TERM");
		smart_terminal_ = isatty(1) && term && string(term) != "dumb";
		smart_terminal_ = unix_isatty(1) && term && string(term) != "dumb";
		#else
		// Disable output buffer. It'd be nice to use line buffering but
		// MSDN says: "For some systems, [_IOLBF] provides line

adb/sysdeps.h

+16 −0

Original line number	Diff line number	Diff line
		@@ -181,6 +181,17 @@ static __inline__ int adb_open_mode(const char* path, int options, int mode)
		extern int unix_open(const char* path, int options, ...);
		#define open ___xxx_unix_open

		// Checks if \|fd\| corresponds to a console.
		// Standard Windows isatty() returns 1 for both console FDs and character
		// devices like NUL. unix_isatty() performs some extra checking to only match
		// console FDs.
		// \|fd\| must be a real file descriptor, meaning STDxx_FILENO or unix_open() FDs
		// will work but adb_open() FDs will not. Additionally the OS handle associated
		// with \|fd\| must have GENERIC_READ access (which console FDs have by default).
		// Returns 1 if \|fd\| is a console FD, 0 otherwise. The value of errno after
		// calling this function is unreliable and should not be used.
		int unix_isatty(int fd);
		#define isatty ___xxx_isatty

		/* normally provided by <cutils/misc.h> */
		extern void* load_file(const char* pathname, unsigned* psize);
		@@ -551,6 +562,11 @@ static __inline__ int adb_creat(const char* path, int mode)
		#undef creat
		#define creat ___xxx_creat

		static __inline__ int unix_isatty(int fd) {
		return isatty(fd);
		}
		#define isatty ___xxx_isatty

		// Helper for network_* functions.
		inline int _fd_set_error_str(int fd, std::string* error) {
		if (fd == -1) {

adb/sysdeps_win32.cpp

+45 −53

Original line number	Diff line number	Diff line
		@@ -2499,10 +2499,52 @@ adb_sysdeps_init( void )
		//
		// Code organization:
		//
		// * _get_console_handle() and unix_isatty() provide console information.
		// * stdin_raw_init() and stdin_raw_restore() reconfigure the console.
		// * unix_read() detects console windows (as opposed to pipes, files, etc.).
		// * _console_read() is the main code of the emulation.

		// Returns a console HANDLE if \|fd\| is a console, otherwise returns nullptr.
		// If a valid HANDLE is returned and \|mode\| is not null, \|mode\| is also filled
		// with the console mode. Requires GENERIC_READ access to the underlying HANDLE.
		static HANDLE _get_console_handle(int fd, DWORD* mode=nullptr) {
		// First check isatty(); this is very fast and eliminates most non-console
		// FDs, but returns 1 for both consoles and character devices like NUL.
		#pragma push_macro("isatty")
		#undef isatty
		if (!isatty(fd)) {
		return nullptr;
		}
		#pragma pop_macro("isatty")

		// To differentiate between character devices and consoles we need to get
		// the underlying HANDLE and use GetConsoleMode(), which is what requires
		// GENERIC_READ permissions.
		const intptr_t intptr_handle = _get_osfhandle(fd);
		if (intptr_handle == -1) {
		return nullptr;
		}
		const HANDLE handle = reinterpret_cast<const HANDLE>(intptr_handle);
		DWORD temp_mode = 0;
		if (!GetConsoleMode(handle, mode ? mode : &temp_mode)) {
		return nullptr;
		}

		return handle;
		}

		// Returns a console handle if \|stream\| is a console, otherwise returns nullptr.
		static HANDLE _get_console_handle(FILE* const stream) {
		const int fd = fileno(stream);
		if (fd < 0) {
		return nullptr;
		}
		return _get_console_handle(fd);
		}

		int unix_isatty(int fd) {
		return _get_console_handle(fd) ? 1 : 0;
		}

		// Read an input record from the console; one that should be processed.
		static bool _get_interesting_input_record_uncached(const HANDLE console,
		@@ -3302,20 +3344,7 @@ static HANDLE _console_handle; // when set, console mode should be restored

		void stdin_raw_init(const int fd) {
		if (STDIN_FILENO == fd) {
		const HANDLE in = GetStdHandle(STD_INPUT_HANDLE);
		if ((in == INVALID_HANDLE_VALUE) \|\| (in == NULL)) {
		return;
		}

		if (GetFileType(in) != FILE_TYPE_CHAR) {
		// stdin might be a file or pipe.
		return;
		}

		if (!GetConsoleMode(in, &_old_console_mode)) {
		// If GetConsoleMode() fails, stdin is probably is not a console.
		return;
		}
		const HANDLE in = _get_console_handle(fd, &_old_console_mode);

		// Disable ENABLE_PROCESSED_INPUT so that Ctrl-C is read instead of
		// calling the process Ctrl-C routine (configured by
		@@ -3366,11 +3395,8 @@ int unix_read(int fd, void* buf, size_t len) {
		} else {
		// On older versions of Windows (definitely 7, definitely not 10),
		// ReadConsole() with a size >= 31367 fails, so if \|fd\| is a console
		// we need to limit the read size. This may also catch devices like NUL,
		// but that is OK as we just want to avoid capping pipes and files which
		// don't need size limiting. This isatty() test is very simple and quick
		// and doesn't call the OS.
		if (isatty(fd) && len > 4096) {
		// we need to limit the read size.
		if (len > 4096 && unix_isatty(fd)) {
		len = 4096;
		}
		// Just call into C Runtime which can read from pipes/files and which
		@@ -3725,40 +3751,6 @@ int adb_chmod(const char* path, int mode) {
		return _wchmod(widen(path).c_str(), mode);
		}

		// Internal function to get a Win32 console HANDLE from a C Runtime FILE*.
		static HANDLE _get_console_handle(FILE* const stream) {
		// Get a C Runtime file descriptor number from the FILE* structure.
		const int fd = fileno(stream);
		if (fd < 0) {
		return NULL;
		}

		// If it is not a "character device", it is probably a file and not a
		// console. Do this check early because it is probably cheap. Still do more
		// checks after this since there are devices that pass this test, but are
		// not a console, such as NUL, the Windows /dev/null equivalent (I think).
		if (!isatty(fd)) {
		return NULL;
		}

		// Given a C Runtime file descriptor number, get the underlying OS
		// file handle.
		const intptr_t osfh = _get_osfhandle(fd);
		if (osfh == -1) {
		return NULL;
		}

		const HANDLE h = reinterpret_cast<const HANDLE>(osfh);

		DWORD old_mode = 0;
		if (!GetConsoleMode(h, &old_mode)) {
		return NULL;
		}

		// If GetConsoleMode() was successful, assume this is a console.
		return h;
		}

		// Internal helper function to write UTF-8 bytes to a console. Returns -1
		// on error.
		static int _console_write_utf8(const char* buf, size_t size, FILE* stream,