b9c1b51e45
*** to conform to clang-format’s LLVM style. This kind of mass change has
*** two obvious implications:
Firstly, merging this particular commit into a downstream fork may be a huge
effort. Alternatively, it may be worth merging all changes up to this commit,
performing the same reformatting operation locally, and then discarding the
merge for this particular commit. The commands used to accomplish this
reformatting were as follows (with current working directory as the root of
the repository):
find . \( -iname "*.c" -or -iname "*.cpp" -or -iname "*.h" -or -iname "*.mm" \) -exec clang-format -i {} +
find . -iname "*.py" -exec autopep8 --in-place --aggressive --aggressive {} + ;
The version of clang-format used was 3.9.0, and autopep8 was 1.2.4.
Secondly, “blame” style tools will generally point to this commit instead of
a meaningful prior commit. There are alternatives available that will attempt
to look through this change and find the appropriate prior commit. YMMV.
llvm-svn: 280751
95 lines
2.5 KiB
C++
95 lines
2.5 KiB
C++
//===-- TTYState.cpp --------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Created by Greg Clayton on 3/26/07.
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//
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//===----------------------------------------------------------------------===//
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#include "TTYState.h"
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#include <fcntl.h>
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#include <sys/signal.h>
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#include <unistd.h>
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TTYState::TTYState()
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: m_fd(-1), m_tflags(-1), m_ttystateErr(-1), m_processGroup(-1) {}
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TTYState::~TTYState() {}
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bool TTYState::GetTTYState(int fd, bool saveProcessGroup) {
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if (fd >= 0 && ::isatty(fd)) {
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m_fd = fd;
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m_tflags = fcntl(fd, F_GETFL, 0);
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m_ttystateErr = tcgetattr(fd, &m_ttystate);
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if (saveProcessGroup)
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m_processGroup = tcgetpgrp(0);
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else
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m_processGroup = -1;
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} else {
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m_fd = -1;
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m_tflags = -1;
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m_ttystateErr = -1;
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m_processGroup = -1;
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}
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return m_ttystateErr == 0;
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}
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bool TTYState::SetTTYState() const {
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int result = 0;
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if (IsValid()) {
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if (TFlagsValid())
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result = fcntl(m_fd, F_SETFL, m_tflags);
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if (TTYStateValid())
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result = tcsetattr(m_fd, TCSANOW, &m_ttystate);
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if (ProcessGroupValid()) {
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// Save the original signal handler.
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void (*saved_sigttou_callback)(int) = NULL;
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saved_sigttou_callback = (void (*)(int))signal(SIGTTOU, SIG_IGN);
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// Set the process group
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result = tcsetpgrp(m_fd, m_processGroup);
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// Restore the original signal handler.
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signal(SIGTTOU, saved_sigttou_callback);
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}
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return true;
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}
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return false;
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}
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TTYStateSwitcher::TTYStateSwitcher() : m_currentState(~0) {}
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TTYStateSwitcher::~TTYStateSwitcher() {}
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bool TTYStateSwitcher::GetState(uint32_t idx, int fd, bool saveProcessGroup) {
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if (ValidStateIndex(idx))
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return m_ttystates[idx].GetTTYState(fd, saveProcessGroup);
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return false;
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}
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bool TTYStateSwitcher::SetState(uint32_t idx) const {
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if (!ValidStateIndex(idx))
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return false;
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// See if we already are in this state?
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if (ValidStateIndex(m_currentState) && (idx == m_currentState) &&
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m_ttystates[idx].IsValid())
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return true;
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// Set the state to match the index passed in and only update the
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// current state if there are no errors.
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if (m_ttystates[idx].SetTTYState()) {
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m_currentState = idx;
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return true;
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}
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// We failed to set the state. The tty state was invalid or not
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// initialized.
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return false;
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}
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