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
|
/*
* Copyright (c) 1999-2003 Red Hat, Inc. All rights reserved.
*
* This software may be freely redistributed under the terms of the GNU
* public license.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* getkey
*
* A very simple keygrabber.
*
*/
#include <ctype.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <sys/poll.h>
#include "popt.h"
struct termios tp;
void reset_term(int x) {
tcsetattr(0,TCSANOW,&tp);
exit(x);
}
int main(int argc, char **argv) {
char foo[2];
char list[100]; /* should be enough */
char *waitmessage = NULL;
char *waitprint, *waitsprint;
const char *fooptr;
int waitseconds=0;
int alarmlen=0;
int ignore_control=0;
int tp_if,tp_of,tp_lf;
int x, r;
struct pollfd ufds; /* only one, no need for an array... */
poptContext context;
struct poptOption options[] = {
{ "wait", 'c', POPT_ARG_INT, &waitseconds, 0, "Number of seconds to wait for keypress", NULL },
/* { "message", 'm', POPT_ARG_STRING, &waitmessage, 0, "Message to print out while waiting for string", "NOTE: argument must have a \"%d\" in it so the number of seconds\nleft until getkey times out can be printed" },*/
{ "message", 'm', POPT_ARG_STRING, &waitmessage, 0, "Message to print out while waiting for string\nNOTE: message must have a \"%d\" in it, to hold the number of seconds left to wait", NULL },
{ "ignore-control-chars", 'i', POPT_ARG_NONE, &ignore_control, 0, "Ignore Control-C and Control-D", NULL },
POPT_AUTOHELP
POPT_TABLEEND
};
strcpy(list, "");
context = poptGetContext("getkey", argc, argv, options,
POPT_CONTEXT_POSIXMEHARDER);
poptSetOtherOptionHelp(context, "[keys]");
r = poptGetNextOpt(context);
if (r < -1) {
fprintf(stderr, "%s: %s\n",
poptBadOption(context, POPT_BADOPTION_NOALIAS),
poptStrerror(r));
return -1;
}
fooptr = poptGetArg(context);
if (fooptr != NULL) {
strncpy(list, fooptr, sizeof(list) - 1);
list[99] = '\0';
for (x=0;list[x];x++) list[x]=toupper(list[x]);
}
if (waitseconds) {
alarmlen = waitseconds;
}
foo[0]=foo[1]='\0';
signal(SIGTERM,reset_term);
alarm(alarmlen);
signal(SIGALRM,reset_term);
tcgetattr(0,&tp);
tp_if=tp.c_iflag;
tp_of=tp.c_oflag;
tp_lf=tp.c_lflag;
tp.c_iflag=0;
tp.c_oflag &= ~OPOST;
tp.c_lflag &= ~(ISIG | ICANON);
tcsetattr(0,TCSANOW,&tp);
tp.c_iflag=tp_if;
tp.c_oflag=tp_of;
tp.c_lflag=tp_lf;
ufds.events = POLLIN;
ufds.fd = 0;
if (waitseconds && waitmessage) {
waitprint = alloca (strlen(waitmessage)+15); /* long enough */
waitprint[0] = '\r';
waitsprint = waitprint + 1;
}
while (1) {
if (waitseconds && waitmessage) {
sprintf (waitsprint, waitmessage, waitseconds);
write (1, waitprint, strlen(waitprint));
}
r = poll(&ufds, 1, alarmlen ? 1000 : -1);
if (r == 0) {
/* we have waited a whole second with no keystroke... */
waitseconds--;
}
if (r > 0) {
read(0,foo,1);
foo[0]=toupper(foo[0]);
/* Die if we get a control-c or control-d */
if (ignore_control == 0) {
if (foo[0]==3 || foo[0]==4) reset_term(1);
}
/* Don't let a null character be interpreted as a match
by strstr */
if (foo[0] != 0) {
if (strcmp(list, "") == 0 || strstr(list,foo)) {
reset_term(0);
}
}
}
}
}
|
