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
|
/* $Id$
* $URL$
*
* plugin that forks and exec's once a key is pressed. the difference to the exec plugin is: this can also only be done once!
*
* Copyright (C) 2008, Wolfgang Henerbichler <wogri@wogri.com>
*
* This file is part of LCD4Linux.
*
* LCD4Linux is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* LCD4Linux 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 General Public License for more details.
*
* 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.
*
*/
/*
* exported functions:
*
* int plugin_init_button_exec(void)
* adds various functions
*
*/
/* define the include files you need */
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
/* these should always be included */
#include "debug.h"
#include "plugin.h"
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif
/* sample function 'button_exec' */
/* takes as many arguments as you want, first arguemnt is the command that will be called via exec, all the following are parameters you want to add to your command - you won't know what has happened after forking - no return codes available */
/* Note: all local functions should be declared 'static' */
static void my_button_exec(RESULT * result, int argc, RESULT * argv[])
{
int pid;
int i;
int errsv;
char *args[argc + 1];
char *arg;
char *prog;
char *env[1];
signal(SIGCHLD, SIG_IGN);
prog = R2S(argv[0]);
info(prog);
for (i = 1; i < argc; i++) {
arg = R2S(argv[i]);
args[i] = arg;
info(arg);
}
args[i] = (char *) 0;
env[0] = (char *) 0;
pid = fork();
if (pid == 0) { /* child-process */
/* char *args[] = {"-r", "-t", "-l", (char *) 0 }; */
info("executing program");
execve(prog, args, env);
errsv = errno;
info("executing program failed");
info(strerror(errsv));
exit(0);
} else if (pid == -1) {
info("weird error has occured. couldn't fork.");
} else {
SetResult(&result, R_STRING, "0");
}
}
/* plugin initialization */
/* MUST NOT be declared 'static'! */
int plugin_init_button_exec(void)
{
/* register all our cool functions */
/* the second parameter is the number of arguments */
/* -1 stands for variable argument list */
AddFunction("button_exec", -1, my_button_exec);
return 0;
}
void plugin_exit_button_exec(void)
{
/* free any allocated memory */
/* close filedescriptors */
}
|
