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// Copyright (C) 2010-2014 David Sugar, Tycho Softworks.
// Copyright (C) 2015-2020 Cherokees of Idaho.
//
// This file is part of GNU uCommon C++.
//
// GNU uCommon C++ is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU uCommon C++ is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with GNU uCommon C++. If not, see <http://www.gnu.org/licenses/>.
#include <ucommon/secure.h>
#ifdef _MSWINDOWS_
#include <conio.h>
#else
#include <unistd.h>
#include <termios.h>
#endif
using namespace ucommon;
static shell::flagopt helpflag('h',"--help", _TEXT("display this list"));
static shell::flagopt althelp('?', NULL, NULL);
static shell::numericopt timeout('t', "--timeout", _TEXT("optional keyboard input timeout"), "seconds", 0);
#ifdef _MSWINDOWS_
HANDLE input;
DWORD mode;
#else
static struct termios orig, current;
static void cleanup(void)
{
tcsetattr(0, TCSANOW, &orig);
}
#endif
static void keyflush(void)
{
#ifdef _MSWINDOWS_
TCHAR ch;
DWORD count;
while(WaitForSingleObject(input, 20) == WAIT_OBJECT_0) {
ReadConsole(input, &ch, 1, &count, NULL);
}
#else
fd_set inp;
struct timeval tv;
char ch;
FD_ZERO(&inp);
FD_SET(0, &inp);
for(;;) {
tv.tv_usec = 20000;
tv.tv_sec = 0;
if(select(1, &inp, NULL, NULL, &tv) <= 0)
break;
if(::read(0, &ch, 1) < 1)
break;
}
#endif
}
int main(int argc, char **argv)
{
shell::bind("keywait");
shell args(argc, argv);
bool nl = false;
unsigned count = 0;
int excode = 2;
if(is(helpflag) || is(althelp)) {
printf("%s\n", _TEXT("Usage: keywait [options] [text]"));
printf("%s\n\n", _TEXT("Wait for keyboard input"));
printf("%s\n", _TEXT("Options:"));
shell::help();
printf("\n%s\n", _TEXT("Report bugs to dyfet@gnutelephony.org"));
return 0;
}
while(count < args()) {
shell::printf("%s ", args[count++]);
nl = true;
}
#ifdef _MSWINDOWS_
input = GetStdHandle(STD_INPUT_HANDLE);
GetConsoleMode(input, &mode);
SetConsoleMode(input, 0);
keyflush();
DWORD timer = INFINITE;
if(is(timeout))
timer = *timeout;
if(WaitForSingleObject(input, timer) == WAIT_OBJECT_0) {
keyflush();
excode = 0;
}
else
excode = 1;
SetConsoleMode(input, mode);
#else
tcgetattr(0, &orig);
shell::exiting(&cleanup);
tcgetattr(0, ¤t);
#ifdef __sun
current.c_iflag &= ~(IMAXBEL|IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
current.c_oflag &= ~OPOST;
current.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
current.c_cflag &= ~(CSIZE|PARENB);
current.c_cflag |= CS8;
#else
cfmakeraw(¤t);
#endif
tcsetattr(0, TCSANOW, ¤t);
fd_set inp;
struct timeval tv = {0, 0};
struct timeval *tvp = NULL;
FD_ZERO(&inp);
FD_SET(0, &inp);
if(*timeout) {
tv.tv_sec = *timeout;
tvp = &tv;
}
int rtn = select(1, &inp, NULL, NULL, tvp);
if(rtn > 0) {
keyflush();
excode = 0;
}
else {
if(rtn == 0)
excode = 1;
}
cleanup();
#endif
if(nl)
shell::printf("\n");
return excode;
}
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