1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
#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);
signal (SIGHUP, SIG_IGN);
signal (SIGINT, SIG_IGN);
signal (SIGTERM, SIG_IGN);
signal (SIGALRM, SIG_IGN);
}
}
static void fail(void)
{
exit(1);
}
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;
atexit(cleanup_tty);
handlerIsSet = 1;
}
/*------ Restore original TTY settings on exit --------*/
signal (SIGHUP, (SIG_CAST) fail);
signal (SIGINT, (SIG_CAST) fail);
signal (SIGTERM, (SIG_CAST) fail);
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;
}
}
|
