mirror of
https://github.com/tstack/lnav
synced 2024-11-17 15:29:40 +00:00
1033 lines
35 KiB
C++
1033 lines
35 KiB
C++
/**
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* Copyright (c) 2007-2012, Timothy Stack
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Timothy Stack nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/time.h>
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#include <sys/ioctl.h>
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#include <termios.h>
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#include <signal.h>
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#if defined HAVE_NCURSESW_CURSES_H
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# include <ncursesw/curses.h>
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#elif defined HAVE_NCURSESW_H
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# include <ncursesw.h>
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#elif defined HAVE_NCURSES_CURSES_H
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# include <ncurses/curses.h>
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#elif defined HAVE_NCURSES_H
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# include <ncurses.h>
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#elif defined HAVE_CURSES_H
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# include <curses.h>
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#else
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# error "SysV or X/Open-compatible Curses header file required"
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#endif
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#ifdef HAVE_PTY_H
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#include <pty.h>
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#endif
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#ifdef HAVE_UTIL_H
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#include <util.h>
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#endif
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#ifdef HAVE_LIBUTIL_H
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#include <libutil.h>
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#endif
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#include <map>
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#include <queue>
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#include <string>
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#include <sstream>
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#include <algorithm>
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#include <utility>
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#include "ww898/cp_utf8.hpp"
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#include "fmt/format.h"
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#include "ghc/filesystem.hpp"
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#include "auto_fd.hh"
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#include "auto_mem.hh"
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#include "termios_guard.hh"
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#include "styling.hh"
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using namespace std;
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std::string repeat(const std::string& input, size_t num)
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{
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std::ostringstream os;
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std::fill_n(std::ostream_iterator<std::string>(os), num, input);
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return os.str();
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}
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/**
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* An RAII class for opening a PTY and forking a child process.
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*/
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class child_term {
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public:
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class error : public std::exception {
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public:
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error(int err) : e_err(err)
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{};
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int e_err;
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};
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explicit child_term(bool passin)
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{
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struct winsize ws;
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auto_fd slave;
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memset(&ws, 0, sizeof(ws));
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if (isatty(STDIN_FILENO) &&
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tcgetattr(STDIN_FILENO, &this->ct_termios) == -1) {
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throw error(errno);
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}
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if (isatty(STDOUT_FILENO) &&
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ioctl(STDOUT_FILENO, TIOCGWINSZ, &this->ct_winsize) == -1) {
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throw error(errno);
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}
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ws.ws_col = 80;
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ws.ws_row = 24;
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if (openpty(this->ct_master.out(),
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slave.out(),
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nullptr,
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nullptr,
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&ws) < 0) {
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throw error(errno);
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}
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if ((this->ct_child = fork()) == -1)
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throw error(errno);
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if (this->ct_child == 0) {
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this->ct_master.reset();
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if (!passin) {
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dup2(slave, STDIN_FILENO);
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}
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dup2(slave, STDOUT_FILENO);
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setenv("TERM", "xterm-color", 1);
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} else {
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slave.reset();
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}
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};
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virtual ~child_term()
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{
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(void) this->wait_for_child();
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if (isatty(STDIN_FILENO) &&
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tcsetattr(STDIN_FILENO, TCSANOW, &this->ct_termios) == -1) {
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perror("tcsetattr");
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}
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if (isatty(STDOUT_FILENO) &&
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ioctl(STDOUT_FILENO, TIOCSWINSZ, &this->ct_winsize) == -1) {
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perror("ioctl");
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}
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};
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int wait_for_child()
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{
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int retval = -1;
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if (this->ct_child > 0) {
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kill(this->ct_child, SIGTERM);
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this->ct_child = -1;
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while (wait(&retval) < 0 && (errno == EINTR));
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}
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return retval;
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};
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bool is_child() const
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{ return this->ct_child == 0; };
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pid_t get_child_pid() const
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{ return this->ct_child; };
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int get_fd() const
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{ return this->ct_master; };
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protected:
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pid_t ct_child;
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auto_fd ct_master;
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struct termios ct_termios;
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struct winsize ct_winsize;
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};
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/**
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* @param fd The file descriptor to switch to raw mode.
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* @return Zero on success, -1 on error.
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*/
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static int tty_raw(int fd)
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{
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struct termios attr[1];
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assert(fd >= 0);
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if (tcgetattr(fd, attr) == -1)
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return -1;
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attr->c_lflag &= ~(ECHO | ICANON | IEXTEN);
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attr->c_iflag &= ~(ICRNL | INPCK | ISTRIP | IXON);
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attr->c_cflag &= ~(CSIZE | PARENB);
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attr->c_cflag |= (CS8);
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attr->c_oflag &= ~(OPOST);
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attr->c_cc[VMIN] = 1;
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attr->c_cc[VTIME] = 0;
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return tcsetattr(fd, TCSANOW, attr);
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}
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static void dump_memory(FILE *dst, const char *src, int len)
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{
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int lpc;
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for (lpc = 0; lpc < len; lpc++) {
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fprintf(dst, "%02x", src[lpc] & 0xff);
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}
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}
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static std::vector<char> hex2bits(const char *src)
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{
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std::vector<char> retval;
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for (size_t lpc = 0; src[lpc] && isdigit(src[lpc]); lpc += 2) {
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int val;
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sscanf(&src[lpc], "%2x", &val);
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retval.push_back((char) val);
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}
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return retval;
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}
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typedef enum {
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CT_WRITE,
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} command_type_t;
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struct command {
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command_type_t c_type;
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vector<char> c_arg;
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};
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static struct {
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const char *sd_program_name{nullptr};
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sig_atomic_t sd_looping{true};
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pid_t sd_child_pid{-1};
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ghc::filesystem::path sd_actual_name;
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auto_mem<FILE> sd_from_child{fclose};
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ghc::filesystem::path sd_expected_name;
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deque<struct command> sd_replay;
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} scripty_data;
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static const std::map<std::string, std::string> CSI_TO_DESC = {
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{")0", "Use alt charset"},
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{"[?1000l", "Don't Send Mouse X & Y"},
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{"[?1002l", "Don’t Use Cell Motion Mouse Tracking"},
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{"[?1006l", "Don't ..."},
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{"[?1h", "Application cursor keys"},
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{"[?1l", "Normal cursor keys"},
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{"[?47h", "Use alternate screen buffer"},
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{"[?47l", "Use normal screen buffer"},
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{"[4l", "Replace mode"},
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{"[2J", "Erase all"},
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};
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struct term_machine {
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enum class state {
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NORMAL,
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ESCAPE_START,
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ESCAPE_FIXED_LENGTH,
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ESCAPE_VARIABLE_LENGTH,
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ESCAPE_OSC,
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};
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struct term_attr {
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term_attr(size_t pos, const std::string& desc)
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: ta_pos(pos), ta_end(pos), ta_desc({desc}) {
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}
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term_attr(size_t pos, size_t end, const std::string& desc)
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: ta_pos(pos), ta_end(end), ta_desc({desc}) {
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}
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size_t ta_pos;
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size_t ta_end;
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std::vector<std::string> ta_desc;
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};
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term_machine(child_term& ct) : tm_child_term(ct) {
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this->clear();
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}
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~term_machine() {
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this->flush_line();
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}
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void clear() {
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std::fill(begin(this->tm_line), end(this->tm_line), ' ');
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this->tm_line_attrs.clear();
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this->tm_new_data = false;
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}
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void add_line_attr(const std::string& desc) {
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if (!this->tm_line_attrs.empty() &&
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this->tm_line_attrs.back().ta_pos == this->tm_cursor_x) {
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this->tm_line_attrs.back().ta_desc.emplace_back(desc);
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} else {
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this->tm_line_attrs.emplace_back(this->tm_cursor_x, desc);
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}
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}
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void write_char(char ch) {
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if (isprint(ch)) {
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require(ch);
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this->tm_new_data = true;
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this->tm_line[this->tm_cursor_x++] = (unsigned char) ch;
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} else {
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switch (ch) {
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case '\a':
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this->flush_line();
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fprintf(scripty_data.sd_from_child, "CTRL bell\n");
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break;
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case '\x08':
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this->add_line_attr("backspace");
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if (this->tm_cursor_x > 0) {
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this->tm_cursor_x -= 1;
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}
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break;
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case '\r':
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this->add_line_attr("carriage-return");
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this->tm_cursor_x = 0;
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break;
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case '\n':
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this->flush_line();
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if (this->tm_cursor_y >= 0) {
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this->tm_cursor_y += 1;
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}
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this->tm_cursor_x = 0;
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break;
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case '\x0e':
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this->tm_shift_start = this->tm_cursor_x;
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break;
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case '\x0f':
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if (this->tm_shift_start != this->tm_cursor_x) {
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this->tm_line_attrs.emplace_back(this->tm_shift_start,
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this->tm_cursor_x,
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"alt");
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}
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break;
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default:
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require(ch);
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this->tm_new_data = true;
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this->tm_line[this->tm_cursor_x++] = (unsigned char) ch;
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break;
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}
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}
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}
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void flush_line() {
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if (std::exchange(this->tm_waiting_on_input, false) &&
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!this->tm_user_input.empty()) {
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fprintf(stderr, "flush keys\n");
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fprintf(scripty_data.sd_from_child, "K ");
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dump_memory(scripty_data.sd_from_child,
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this->tm_user_input.data(),
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this->tm_user_input.size());
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fprintf(scripty_data.sd_from_child, "\n");
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this->tm_user_input.clear();
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}
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if (this->tm_new_data || !this->tm_line_attrs.empty()) {
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// fprintf(scripty_data.sd_from_child, "flush %d\n", this->tm_flush_count);
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fprintf(stderr, "flush %d\n", this->tm_flush_count++);
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fprintf(scripty_data.sd_from_child,
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"S % 3d \u250B",
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this->tm_cursor_y);
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for (auto uch : this->tm_line) {
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ww898::utf::utf8::write(uch, [](auto ch) {
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fputc(ch, scripty_data.sd_from_child);
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});
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}
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fprintf(scripty_data.sd_from_child, "\u250B\n");
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for (size_t lpc = 0; lpc < this->tm_line_attrs.size(); lpc++) {
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const auto& ta = this->tm_line_attrs[lpc];
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auto full_desc = fmt::format("{}", fmt::join(ta.ta_desc.begin(),
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ta.ta_desc.end(),
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", "));
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int line_len;
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if (ta.ta_pos == ta.ta_end) {
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line_len = fprintf(scripty_data.sd_from_child,
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"A %s%s %s",
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repeat("\u00B7", ta.ta_pos).c_str(),
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((lpc + 1 <
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this->tm_line_attrs.size()) &&
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(ta.ta_pos ==
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this->tm_line_attrs[lpc + 1].ta_pos)) ?
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"\u251C" :
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"\u2514",
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full_desc.c_str());
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line_len -= 2 + ta.ta_pos;
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} else {
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line_len = fprintf(scripty_data.sd_from_child,
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"A %s%s%s\u251b %s",
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std::string(ta.ta_pos, ' ').c_str(),
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((lpc + 1 <
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this->tm_line_attrs.size()) &&
|
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(ta.ta_pos ==
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this->tm_line_attrs[lpc + 1].ta_pos)) ?
|
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"\u2518" :
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"\u2514",
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std::string(ta.ta_end - ta.ta_pos - 1, '-').c_str(),
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full_desc.c_str());
|
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line_len -= 4;
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}
|
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for (size_t lpc2 = lpc + 1; lpc2 < this->tm_line_attrs.size(); lpc2++) {
|
||
auto bar_pos = 7 + this->tm_line_attrs[lpc2].ta_pos;
|
||
|
||
if (bar_pos < line_len) {
|
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continue;
|
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}
|
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line_len += fprintf(scripty_data.sd_from_child, "%s\u2502",
|
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std::string(bar_pos - line_len, ' ').c_str());
|
||
line_len -= 2;
|
||
}
|
||
fprintf(scripty_data.sd_from_child, "\n");
|
||
}
|
||
this->clear();
|
||
}
|
||
fflush(scripty_data.sd_from_child);
|
||
}
|
||
|
||
std::vector<int> get_m_params() {
|
||
std::vector<int> retval;
|
||
size_t index = 1;
|
||
|
||
while (index < this->tm_escape_buffer.size()) {
|
||
int val, last;
|
||
|
||
if (sscanf(&this->tm_escape_buffer[index], "%d%n", &val, &last) == 1) {
|
||
retval.push_back(val);
|
||
index += last;
|
||
if (this->tm_escape_buffer[index] != ';') {
|
||
break;
|
||
}
|
||
index += 1;
|
||
} else {
|
||
break;
|
||
}
|
||
}
|
||
|
||
return retval;
|
||
}
|
||
|
||
void new_user_input(char ch) {
|
||
this->tm_user_input.push_back(ch);
|
||
}
|
||
|
||
void new_input(char ch) {
|
||
if (this->tm_unicode_remaining > 0) {
|
||
this->tm_unicode_buffer.push_back(ch);
|
||
this->tm_unicode_remaining -= 1;
|
||
if (this->tm_unicode_remaining == 0) {
|
||
this->tm_new_data = true;
|
||
this->tm_line[this->tm_cursor_x++] = ww898::utf::utf8::read(
|
||
[this]() {
|
||
auto retval = this->tm_unicode_buffer.front();
|
||
|
||
this->tm_unicode_buffer.pop_front();
|
||
return retval;
|
||
});
|
||
}
|
||
return;
|
||
} else {
|
||
auto utfsize = ww898::utf::utf8::char_size([ch]() {
|
||
return std::make_pair(ch, 16);
|
||
});
|
||
|
||
|
||
if (utfsize.unwrap() > 1) {
|
||
this->tm_unicode_remaining = utfsize.unwrap() - 1;
|
||
this->tm_unicode_buffer.push_back(ch);
|
||
return;
|
||
}
|
||
}
|
||
|
||
switch (this->tm_state) {
|
||
case state::NORMAL: {
|
||
switch (ch) {
|
||
case '\x1b': {
|
||
this->tm_escape_buffer.clear();
|
||
this->tm_state = state::ESCAPE_START;
|
||
break;
|
||
}
|
||
default: {
|
||
this->write_char(ch);
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
case state::ESCAPE_START: {
|
||
switch (ch) {
|
||
case '[': {
|
||
this->tm_escape_buffer.push_back(ch);
|
||
this->tm_state = state::ESCAPE_VARIABLE_LENGTH;
|
||
break;
|
||
}
|
||
case ']': {
|
||
this->tm_escape_buffer.push_back(ch);
|
||
this->tm_state = state::ESCAPE_OSC;
|
||
break;
|
||
}
|
||
case '(':
|
||
case ')':
|
||
case '*':
|
||
case '+': {
|
||
this->tm_state = state::ESCAPE_FIXED_LENGTH;
|
||
this->tm_escape_buffer.push_back(ch);
|
||
this->tm_escape_expected_size = 2;
|
||
break;
|
||
}
|
||
default: {
|
||
this->flush_line();
|
||
switch (ch) {
|
||
case '7':
|
||
fprintf(scripty_data.sd_from_child,
|
||
"CTRL save cursor\n");
|
||
break;
|
||
case '8':
|
||
fprintf(scripty_data.sd_from_child,
|
||
"CTRL restore cursor\n");
|
||
break;
|
||
case '>':
|
||
fprintf(scripty_data.sd_from_child,
|
||
"CTRL Normal keypad\n");
|
||
break;
|
||
default: {
|
||
fprintf(scripty_data.sd_from_child,
|
||
"CTRL %c\n",
|
||
ch);
|
||
break;
|
||
}
|
||
}
|
||
this->tm_state = state::NORMAL;
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
case state::ESCAPE_FIXED_LENGTH: {
|
||
this->tm_escape_buffer.push_back(ch);
|
||
if (this->tm_escape_buffer.size() == this->tm_escape_expected_size) {
|
||
auto iter = CSI_TO_DESC.find(
|
||
std::string(this->tm_escape_buffer.data(),
|
||
this->tm_escape_buffer.size()));
|
||
this->flush_line();
|
||
if (iter == CSI_TO_DESC.end()) {
|
||
fprintf(scripty_data.sd_from_child,
|
||
"CTRL %.*s\n",
|
||
(int) this->tm_escape_buffer.size(),
|
||
this->tm_escape_buffer.data());
|
||
} else {
|
||
fprintf(scripty_data.sd_from_child,
|
||
"CTRL %s\n",
|
||
iter->second.c_str());
|
||
}
|
||
this->tm_state = state::NORMAL;
|
||
}
|
||
break;
|
||
}
|
||
case state::ESCAPE_VARIABLE_LENGTH: {
|
||
this->tm_escape_buffer.push_back(ch);
|
||
if (isalpha(ch)) {
|
||
auto iter = CSI_TO_DESC.find(
|
||
std::string(this->tm_escape_buffer.data(),
|
||
this->tm_escape_buffer.size()));
|
||
if (iter == CSI_TO_DESC.end()) {
|
||
this->tm_escape_buffer.push_back('\0');
|
||
switch (ch) {
|
||
case 'C': {
|
||
auto amount = this->get_m_params();
|
||
|
||
this->tm_cursor_x += amount[0];
|
||
break;
|
||
}
|
||
case 'J': {
|
||
auto param = this->get_m_params();
|
||
|
||
this->flush_line();
|
||
|
||
auto region = param.empty() ? 0 : param[0];
|
||
switch (region) {
|
||
case 0:
|
||
fprintf(scripty_data.sd_from_child,
|
||
"CSI Erase Below\n");
|
||
break;
|
||
case 1:
|
||
fprintf(scripty_data.sd_from_child,
|
||
"CSI Erase Above\n");
|
||
break;
|
||
case 2:
|
||
fprintf(scripty_data.sd_from_child,
|
||
"CSI Erase All\n");
|
||
break;
|
||
case 3:
|
||
fprintf(scripty_data.sd_from_child,
|
||
"CSI Erase Saved Lines\n");
|
||
break;
|
||
}
|
||
break;
|
||
}
|
||
case 'H': {
|
||
auto coords = this->get_m_params();
|
||
|
||
if (coords.empty()) {
|
||
coords = {1, 1};
|
||
}
|
||
this->flush_line();
|
||
this->tm_cursor_y = coords[0];
|
||
this->tm_cursor_x = coords[1] - 1;
|
||
break;
|
||
}
|
||
case 'r': {
|
||
auto region = this->get_m_params();
|
||
|
||
this->flush_line();
|
||
fprintf(scripty_data.sd_from_child,
|
||
"CSI set scrolling region %d-%d\n",
|
||
region[0],
|
||
region[1]);
|
||
break;
|
||
}
|
||
case 'm': {
|
||
auto attrs = this->get_m_params();
|
||
|
||
if (attrs.empty()) {
|
||
this->add_line_attr("normal");
|
||
} else if ((30 <= attrs[0]) && (attrs[0] <= 37)) {
|
||
auto xt = xterm_colors();
|
||
|
||
this->add_line_attr(fmt::format(
|
||
"fg({})",
|
||
xt->tc_palette[attrs[0] - 30].xc_hex));
|
||
} else if (attrs[0] == 38) {
|
||
auto xt = xterm_colors();
|
||
|
||
require(attrs[1] == 5);
|
||
this->add_line_attr(fmt::format(
|
||
"fg({})",
|
||
xt->tc_palette[attrs[2]].xc_hex));
|
||
} else if ((40 <= attrs[0]) && (attrs[0] <= 47)) {
|
||
auto xt = xterm_colors();
|
||
|
||
this->add_line_attr(fmt::format(
|
||
"bg({})", xt->tc_palette[attrs[0] - 40].xc_hex));
|
||
} else if (attrs[0] == 48) {
|
||
auto xt = xterm_colors();
|
||
|
||
require(attrs[1] == 5);
|
||
this->add_line_attr(fmt::format(
|
||
"bg({})",
|
||
xt->tc_palette[attrs[2]].xc_hex));
|
||
} else {
|
||
switch (attrs[0]) {
|
||
case 1:
|
||
this->add_line_attr("bold");
|
||
break;
|
||
case 4:
|
||
this->add_line_attr("underline");
|
||
break;
|
||
case 5:
|
||
this->add_line_attr("blink");
|
||
break;
|
||
case 7:
|
||
this->add_line_attr("inverse");
|
||
break;
|
||
default:
|
||
this->add_line_attr(this->tm_escape_buffer.data());
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
default:
|
||
fprintf(stderr, "missed %c\n", ch);
|
||
this->add_line_attr(this->tm_escape_buffer.data());
|
||
break;
|
||
}
|
||
} else {
|
||
this->flush_line();
|
||
fprintf(scripty_data.sd_from_child,
|
||
"CSI %s\n",
|
||
iter->second.c_str());
|
||
}
|
||
this->tm_state = state::NORMAL;
|
||
} else {
|
||
|
||
}
|
||
break;
|
||
}
|
||
case state::ESCAPE_OSC: {
|
||
if (ch == '\a') {
|
||
this->tm_escape_buffer.push_back('\0');
|
||
|
||
auto num = this->get_m_params();
|
||
auto semi_index = strchr(
|
||
this->tm_escape_buffer.data(), ';');
|
||
|
||
switch (num[0]) {
|
||
case 0: {
|
||
this->flush_line();
|
||
fprintf(scripty_data.sd_from_child,
|
||
"OSC Set window title: %s\n",
|
||
semi_index + 1);
|
||
break;
|
||
}
|
||
case 999: {
|
||
this->flush_line();
|
||
this->tm_waiting_on_input = true;
|
||
if (!scripty_data.sd_replay.empty()) {
|
||
const auto &cmd = scripty_data.sd_replay.front();
|
||
|
||
this->tm_user_input = cmd.c_arg;
|
||
write(this->tm_child_term.get_fd(),
|
||
this->tm_user_input.data(),
|
||
this->tm_user_input.size());
|
||
|
||
scripty_data.sd_replay.pop_front();
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
this->tm_state = state::NORMAL;
|
||
} else {
|
||
this->tm_escape_buffer.push_back(ch);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
child_term& tm_child_term;
|
||
bool tm_waiting_on_input{false};
|
||
state tm_state{state::NORMAL};
|
||
std::vector<char> tm_escape_buffer;
|
||
std::deque<uint8_t> tm_unicode_buffer;
|
||
size_t tm_unicode_remaining{0};
|
||
size_t tm_escape_expected_size{0};
|
||
uint32_t tm_line[80];
|
||
bool tm_new_data{false};
|
||
size_t tm_cursor_x{0};
|
||
int tm_cursor_y{-1};
|
||
size_t tm_shift_start{0};
|
||
std::vector<term_attr> tm_line_attrs;
|
||
|
||
std::vector<char> tm_user_input;
|
||
|
||
size_t tm_flush_count{0};
|
||
};
|
||
|
||
static void sigchld(int sig)
|
||
{
|
||
}
|
||
|
||
static void sigpass(int sig)
|
||
{
|
||
kill(scripty_data.sd_child_pid, sig);
|
||
}
|
||
|
||
static void usage()
|
||
{
|
||
const char *usage_msg =
|
||
"usage: %s [-h] [-t to_child] [-f from_child] -- <cmd>\n"
|
||
"\n"
|
||
"Recorder for TTY I/O from a child process."
|
||
"\n"
|
||
"Options:\n"
|
||
" -h Print this message, then exit.\n"
|
||
" -n Do not pass the output to the console.\n"
|
||
" -i Pass stdin to the child process instead of connecting\n"
|
||
" the child to the tty.\n"
|
||
" -a <file> The file where the actual I/O from/to the child process\n"
|
||
" should be stored.\n"
|
||
" -e <file> The file containing the expected I/O from/to the child\n"
|
||
" process.\n"
|
||
"\n"
|
||
"Examples:\n"
|
||
" To record a session for playback later:\n"
|
||
" $ scripty -f output.0 -- myCursesApp\n"
|
||
"\n"
|
||
" To replay the recorded session:\n"
|
||
" $ scripty -e input.0 -- myCursesApp\n";
|
||
|
||
fprintf(stderr, usage_msg, scripty_data.sd_program_name);
|
||
}
|
||
|
||
int main(int argc, char *argv[])
|
||
{
|
||
int c, fd, retval = EXIT_SUCCESS;
|
||
bool passout = true, passin = false, prompt = false;
|
||
auto_mem<FILE> file(fclose);
|
||
|
||
scripty_data.sd_program_name = argv[0];
|
||
scripty_data.sd_looping = true;
|
||
|
||
while ((c = getopt(argc, argv, "ha:e:nip")) != -1) {
|
||
switch (c) {
|
||
case 'h':
|
||
usage();
|
||
exit(retval);
|
||
break;
|
||
case 'a':
|
||
scripty_data.sd_actual_name = optarg;
|
||
break;
|
||
case 'e':
|
||
scripty_data.sd_expected_name = optarg;
|
||
if ((file = fopen(optarg, "r")) == nullptr) {
|
||
fprintf(stderr, "error: cannot open %s\n", optarg);
|
||
retval = EXIT_FAILURE;
|
||
} else {
|
||
char line[32 * 1024];
|
||
|
||
while (fgets(line, sizeof(line), file)) {
|
||
if (line[0] == 'K') {
|
||
struct command cmd;
|
||
|
||
cmd.c_type = CT_WRITE;
|
||
cmd.c_arg = hex2bits(&line[2]);
|
||
scripty_data.sd_replay.push_back(cmd);
|
||
}
|
||
}
|
||
}
|
||
break;
|
||
case 'n':
|
||
passout = false;
|
||
break;
|
||
case 'i':
|
||
passin = true;
|
||
break;
|
||
case 'p':
|
||
prompt = true;
|
||
break;
|
||
default:
|
||
fprintf(stderr, "error: unknown flag -- %c\n", c);
|
||
retval = EXIT_FAILURE;
|
||
break;
|
||
}
|
||
}
|
||
|
||
argc -= optind;
|
||
argv += optind;
|
||
|
||
if (!scripty_data.sd_expected_name.empty() &&
|
||
scripty_data.sd_actual_name.empty()) {
|
||
scripty_data.sd_actual_name =
|
||
scripty_data.sd_expected_name.filename();
|
||
scripty_data.sd_actual_name += ".tmp";
|
||
}
|
||
|
||
if (!scripty_data.sd_actual_name.empty()) {
|
||
if ((scripty_data.sd_from_child = fopen(
|
||
scripty_data.sd_actual_name.c_str(), "w")) == nullptr) {
|
||
fprintf(stderr,
|
||
"error: unable to open %s -- %s\n",
|
||
scripty_data.sd_actual_name.c_str(),
|
||
strerror(errno));
|
||
retval = EXIT_FAILURE;
|
||
}
|
||
}
|
||
|
||
if (scripty_data.sd_from_child != nullptr) {
|
||
fcntl(fileno(scripty_data.sd_from_child), F_SETFD, 1);
|
||
}
|
||
|
||
if (retval != EXIT_FAILURE) {
|
||
guard_termios gt(STDOUT_FILENO);
|
||
fd = open("/tmp/scripty.err", O_WRONLY | O_CREAT | O_APPEND, 0666);
|
||
dup2(fd, STDERR_FILENO);
|
||
close(fd);
|
||
fprintf(stderr, "startup\n");
|
||
|
||
child_term ct(passin);
|
||
|
||
if (ct.is_child()) {
|
||
execvp(argv[0], argv);
|
||
perror("execvp");
|
||
exit(-1);
|
||
} else {
|
||
int maxfd;
|
||
struct timeval last, now;
|
||
fd_set read_fds;
|
||
term_machine tm(ct);
|
||
|
||
scripty_data.sd_child_pid = ct.get_child_pid();
|
||
signal(SIGINT, sigpass);
|
||
signal(SIGTERM, sigpass);
|
||
|
||
signal(SIGCHLD, sigchld);
|
||
|
||
gettimeofday(&now, nullptr);
|
||
last = now;
|
||
|
||
FD_ZERO(&read_fds);
|
||
FD_SET(STDIN_FILENO, &read_fds);
|
||
FD_SET(ct.get_fd(), &read_fds);
|
||
|
||
fprintf(stderr, "goin in the loop\n");
|
||
|
||
tty_raw(STDIN_FILENO);
|
||
|
||
maxfd = max(STDIN_FILENO, ct.get_fd());
|
||
while (scripty_data.sd_looping) {
|
||
fd_set ready_rfds = read_fds;
|
||
struct timeval diff, to;
|
||
int rc;
|
||
|
||
to.tv_sec = 0;
|
||
to.tv_usec = 10000;
|
||
rc = select(maxfd + 1, &ready_rfds, nullptr, nullptr, &to);
|
||
if (rc == 0) {
|
||
} else if (rc < 0) {
|
||
switch (errno) {
|
||
case EINTR:
|
||
break;
|
||
default:
|
||
fprintf(stderr, "select %s\n", strerror(errno));
|
||
scripty_data.sd_looping = false;
|
||
break;
|
||
}
|
||
} else {
|
||
char buffer[1024];
|
||
|
||
fprintf(stderr, "fds ready %d\n", rc);
|
||
gettimeofday(&now, nullptr);
|
||
timersub(&now, &last, &diff);
|
||
if (FD_ISSET(STDIN_FILENO, &ready_rfds)) {
|
||
rc = read(STDIN_FILENO, buffer, sizeof(buffer));
|
||
if (rc < 0) {
|
||
scripty_data.sd_looping = false;
|
||
} else if (rc == 0) {
|
||
FD_CLR(STDIN_FILENO, &read_fds);
|
||
} else {
|
||
log_perror(write(ct.get_fd(), buffer, rc));
|
||
|
||
for (ssize_t lpc = 0; lpc < rc; lpc++) {
|
||
tm.new_user_input(buffer[lpc]);
|
||
}
|
||
}
|
||
}
|
||
if (FD_ISSET(ct.get_fd(), &ready_rfds)) {
|
||
rc = read(ct.get_fd(), buffer, sizeof(buffer));
|
||
fprintf(stderr, "read rc %d\n", rc);
|
||
if (rc <= 0) {
|
||
scripty_data.sd_looping = false;
|
||
} else {
|
||
if (passout)
|
||
log_perror(write(STDOUT_FILENO, buffer, rc));
|
||
if (scripty_data.sd_from_child != nullptr) {
|
||
for (size_t lpc = 0; lpc < rc; lpc++) {
|
||
fprintf(stderr, "ch %02x\n",
|
||
buffer[lpc] & 0xff);
|
||
tm.new_input(buffer[lpc]);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
last = now;
|
||
}
|
||
}
|
||
|
||
retval = ct.wait_for_child() || retval;
|
||
}
|
||
|
||
if (retval == EXIT_SUCCESS && !scripty_data.sd_expected_name.empty()) {
|
||
auto cmd = fmt::format("diff -ua {} {}",
|
||
scripty_data.sd_expected_name.string(),
|
||
scripty_data.sd_actual_name.string());
|
||
auto rc = system(cmd.c_str());
|
||
if (rc != 0) {
|
||
if (prompt) {
|
||
char resp[4];
|
||
|
||
printf("Would you like to update the original file? (y/N) ");
|
||
fflush(stdout);
|
||
log_perror(scanf("%3s", resp));
|
||
if (strcasecmp(resp, "y") == 0) {
|
||
printf("Updating: %s -> %s\n",
|
||
scripty_data.sd_actual_name.c_str(),
|
||
scripty_data.sd_expected_name.c_str());
|
||
|
||
auto options =
|
||
ghc::filesystem::copy_options::overwrite_existing;
|
||
ghc::filesystem::copy_file(
|
||
scripty_data.sd_actual_name,
|
||
scripty_data.sd_expected_name,
|
||
options);
|
||
}
|
||
else{
|
||
retval = EXIT_FAILURE;
|
||
}
|
||
}
|
||
else {
|
||
fprintf(stderr, "error: mismatch\n");
|
||
retval = EXIT_FAILURE;
|
||
}
|
||
}
|
||
}
|
||
|
||
return retval;
|
||
}
|