201 lines
3.8 KiB
C
Executable file
201 lines
3.8 KiB
C
Executable file
#include "sysincludes.h"
|
|
#include "mtools.h"
|
|
|
|
static FILE *tty=NULL;
|
|
static int notty=0;
|
|
static int ttyfd=-1;
|
|
#ifdef USE_RAWTERM
|
|
int mtools_raw_tty = 1;
|
|
#else
|
|
int mtools_raw_tty = 0;
|
|
#endif
|
|
|
|
#ifdef USE_RAWTERM
|
|
# if defined TCSANOW && defined HAVE_TCSETATTR
|
|
/* we have tcsetattr & tcgetattr. Good */
|
|
typedef struct termios Terminal;
|
|
# define stty(a,b) (void)tcsetattr(a,TCSANOW,b)
|
|
# define gtty(a,b) (void)tcgetattr(a,b)
|
|
# define USE_TCIFLUSH
|
|
|
|
# elif defined TCSETS && defined TCGETS
|
|
typedef struct termios Terminal;
|
|
# define stty(a,b) (void)ioctl(a,TCSETS,(char *)b)
|
|
# define gtty(a,b) (void)ioctl(a,TCGETS,(char *)b)
|
|
# define USE_TCIFLUSH
|
|
|
|
# elif defined TCSETA && defined TCGETA
|
|
typedef struct termio Terminal;
|
|
# define stty(a,b) (void)ioctl(a,TCSETA,(char *)b)
|
|
# define gtty(a,b) (void)ioctl(a,TCGETA,(char *)b)
|
|
# define USE_TCIFLUSH
|
|
|
|
# elif defined(HAVE_SGTTY_H) && defined(TIOCSETP) && defined(TIOCGETP)
|
|
typedef struct sgttyb Terminal;
|
|
# define stty(a,b) (void)ioctl(a,TIOCSETP,(char *)b)
|
|
# define gtty(a,b) (void)ioctl(a,TIOCGETP,(char *)b)
|
|
# define USE_SGTTY
|
|
# define discard_input(a) /**/
|
|
|
|
# else
|
|
/* no way to use raw terminal */
|
|
/*
|
|
# warning Cannot use raw terminal code (disabled)
|
|
*/
|
|
# undef USE_RAWTERM
|
|
# endif
|
|
|
|
#endif
|
|
|
|
#ifdef USE_TCIFLUSH
|
|
# if defined TCIFLUSH && defined HAVE_TCFLUSH
|
|
# define discard_input(a) tcflush(a,TCIFLUSH)
|
|
# else
|
|
# define discard_input(a) /**/
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef USE_RAWTERM
|
|
|
|
static int tty_mode = -1; /* 1 for raw, 0 for cooked, -1 for initial */
|
|
static int need_tty_reset = 0;
|
|
static int handlerIsSet = 0;
|
|
|
|
#define restore_tty(a) stty(STDIN,a)
|
|
|
|
|
|
#define STDIN ttyfd
|
|
#define FAIL (-1)
|
|
#define DONE 0
|
|
static Terminal in_orig;
|
|
|
|
/*--------------- Signal Handler routines -------------*/
|
|
|
|
static void tty_time_out(void)
|
|
{
|
|
int exit_code;
|
|
signal(SIGALRM, SIG_IGN);
|
|
if(tty && need_tty_reset)
|
|
restore_tty (&in_orig);
|
|
#if future
|
|
if (fail_on_timeout)
|
|
exit_code=SHFAIL;
|
|
else {
|
|
if (default_choice && mode_defined) {
|
|
if (yes_no) {
|
|
if ('Y' == default_choice)
|
|
exit_code=0;
|
|
else
|
|
exit_code=1;
|
|
} else
|
|
exit_code=default_choice-minc+1;
|
|
} else
|
|
exit_code=DONE;
|
|
}
|
|
#else
|
|
exit_code = DONE;
|
|
#endif
|
|
exit(exit_code);
|
|
}
|
|
|
|
static void cleanup_tty(void)
|
|
{
|
|
if(tty && need_tty_reset) {
|
|
restore_tty (&in_orig);
|
|
setup_signal();
|
|
}
|
|
}
|
|
|
|
static void set_raw_tty(int mode)
|
|
{
|
|
Terminal in_raw;
|
|
|
|
if(mode != tty_mode && mode != -1) {
|
|
if(!handlerIsSet) {
|
|
/* Determine existing TTY settings */
|
|
gtty (STDIN, &in_orig);
|
|
need_tty_reset = 1;
|
|
|
|
/* Restore original TTY settings on exit */
|
|
atexit(cleanup_tty);
|
|
handlerIsSet = 1;
|
|
}
|
|
|
|
|
|
setup_signal();
|
|
signal (SIGALRM, (SIG_CAST) tty_time_out);
|
|
|
|
/* Change STDIN settings to raw */
|
|
|
|
gtty (STDIN, &in_raw);
|
|
if(mode) {
|
|
#ifdef USE_SGTTY
|
|
in_raw.sg_flags |= CBREAK;
|
|
#else
|
|
in_raw.c_lflag &= ~ICANON;
|
|
in_raw.c_cc[VMIN]=1;
|
|
in_raw.c_cc[VTIME]=0;
|
|
#endif
|
|
stty (STDIN, &in_raw);
|
|
} else {
|
|
#ifdef USE_SGTTY
|
|
in_raw.sg_flags &= ~CBREAK;
|
|
#else
|
|
in_raw.c_lflag |= ICANON;
|
|
#endif
|
|
stty (STDIN, &in_raw);
|
|
}
|
|
tty_mode = mode;
|
|
discard_input(STDIN);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
FILE *opentty(int mode)
|
|
{
|
|
if(notty)
|
|
return NULL;
|
|
if (tty == NULL) {
|
|
ttyfd = open("/dev/tty", O_RDONLY);
|
|
if(ttyfd >= 0) {
|
|
tty = fdopen(ttyfd, "r");
|
|
}
|
|
}
|
|
if (tty == NULL){
|
|
if ( !isatty(0) ){
|
|
notty = 1;
|
|
return NULL;
|
|
}
|
|
ttyfd = 0;
|
|
tty = stdin;
|
|
}
|
|
#ifdef USE_RAWTERM
|
|
if(mtools_raw_tty)
|
|
set_raw_tty(mode);
|
|
#endif
|
|
return tty;
|
|
}
|
|
|
|
int ask_confirmation(const char *format, const char *p1, const char *p2)
|
|
{
|
|
char ans[10];
|
|
|
|
if(!opentty(-1))
|
|
return 0;
|
|
|
|
while (1) {
|
|
fprintf(stderr, format, p1, p2);
|
|
fflush(stderr);
|
|
fflush(opentty(-1));
|
|
if (mtools_raw_tty) {
|
|
ans[0] = fgetc(opentty(1));
|
|
fputs("\n", stderr);
|
|
} else {
|
|
fgets(ans,9, opentty(0));
|
|
}
|
|
if (ans[0] == 'y' || ans[0] == 'Y')
|
|
return 0;
|
|
if (ans[0] == 'n' || ans[0] == 'N')
|
|
return -1;
|
|
}
|
|
}
|