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// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "platform/globals.h"
#if defined(DART_HOST_OS_LINUX) || defined(DART_HOST_OS_ANDROID)
#include "bin/stdio.h"
#include <errno.h> // NOLINT
#include <sys/ioctl.h> // NOLINT
#include <termios.h> // NOLINT
#include "bin/fdutils.h"
#include "platform/signal_blocker.h"
namespace dart {
namespace bin {
bool Stdin::ReadByte(intptr_t fd, int* byte) {
unsigned char b;
ssize_t s = TEMP_FAILURE_RETRY(read(fd, &b, 1));
if (s < 0) {
return false;
}
*byte = (s == 0) ? -1 : b;
return true;
}
bool Stdin::GetEchoMode(intptr_t fd, bool* enabled) {
struct termios term;
int status = NO_RETRY_EXPECTED(tcgetattr(fd, &term));
if (status != 0) {
return false;
}
*enabled = ((term.c_lflag & ECHO) != 0);
return true;
}
bool Stdin::SetEchoMode(intptr_t fd, bool enabled) {
struct termios term;
int status = NO_RETRY_EXPECTED(tcgetattr(fd, &term));
if (status != 0) {
return false;
}
if (enabled) {
term.c_lflag |= ECHO;
} else {
term.c_lflag &= ~(ECHO);
}
status = NO_RETRY_EXPECTED(tcsetattr(fd, TCSANOW, &term));
return (status == 0);
}
bool Stdin::GetEchoNewlineMode(intptr_t fd, bool* enabled) {
struct termios term;
int status = NO_RETRY_EXPECTED(tcgetattr(fd, &term));
if (status != 0) {
return false;
}
*enabled = ((term.c_lflag & ECHONL) != 0);
return true;
}
bool Stdin::SetEchoNewlineMode(intptr_t fd, bool enabled) {
struct termios term;
int status = NO_RETRY_EXPECTED(tcgetattr(fd, &term));
if (status != 0) {
return false;
}
if (enabled) {
term.c_lflag |= ECHONL;
} else {
term.c_lflag &= ~(ECHONL);
}
status = NO_RETRY_EXPECTED(tcsetattr(fd, TCSANOW, &term));
return (status == 0);
}
bool Stdin::GetLineMode(intptr_t fd, bool* enabled) {
struct termios term;
int status = NO_RETRY_EXPECTED(tcgetattr(fd, &term));
if (status != 0) {
return false;
}
*enabled = ((term.c_lflag & ICANON) != 0);
return true;
}
bool Stdin::SetLineMode(intptr_t fd, bool enabled) {
struct termios term;
int status = NO_RETRY_EXPECTED(tcgetattr(fd, &term));
if (status != 0) {
return false;
}
if (enabled) {
term.c_lflag |= ICANON;
} else {
term.c_lflag &= ~(ICANON);
}
status = NO_RETRY_EXPECTED(tcsetattr(fd, TCSANOW, &term));
return (status == 0);
}
static bool TermIsKnownToSupportAnsi() {
const char* term = getenv("TERM");
if (term == nullptr) {
return false;
}
return strstr(term, "xterm") != nullptr ||
strstr(term, "screen") != nullptr || strstr(term, "rxvt") != nullptr;
}
bool Stdin::AnsiSupported(intptr_t fd, bool* supported) {
*supported = (isatty(fd) != 0) && TermIsKnownToSupportAnsi();
return true;
}
bool Stdout::GetTerminalSize(intptr_t fd, int size[2]) {
struct winsize w;
int status = NO_RETRY_EXPECTED(ioctl(fd, TIOCGWINSZ, &w));
if ((status == 0) && ((w.ws_col != 0) || (w.ws_row != 0))) {
size[0] = w.ws_col;
size[1] = w.ws_row;
return true;
}
return false;
}
bool Stdout::AnsiSupported(intptr_t fd, bool* supported) {
*supported = (isatty(fd) != 0) && TermIsKnownToSupportAnsi();
return true;
}
} // namespace bin
} // namespace dart
#endif // defined(DART_HOST_OS_LINUX) || defined(DART_HOST_OS_ANDROID)