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
|
/* ... */
//-----------------------------------------------------------------------------
//
// Copyright(C) 2009 Simon Howard
//
// This program 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
// of the License, or (at your option) any later version.
//
// This program 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., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
//-----------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#define RESPONSE_FILE "/tmp/launcher.rsp"
static char *executable_path;
// Called on startup to save the location of the launcher program
// (within a package, other executables should be in the same directory)
void SetProgramLocation(const char *path)
{
char *p;
executable_path = strdup(path);
p = strrchr(executable_path, '/');
*p = '\0';
}
// Write out the response file containing command line arguments.
static void WriteResponseFile(const char *iwad, const char *args)
{
FILE *fstream;
fstream = fopen(RESPONSE_FILE, "w");
if (iwad != NULL)
{
fprintf(fstream, "-iwad \"%s\"", iwad);
}
if (args != NULL)
{
fprintf(fstream, "%s", args);
}
fclose(fstream);
}
static void DoExec(const char *executable, const char *iwad, const char *args)
{
char *argv[3];
argv[0] = malloc(strlen(executable_path) + strlen(executable) + 3);
sprintf(argv[0], "%s/%s", executable_path, executable);
if (iwad != NULL || args != NULL)
{
WriteResponseFile(iwad, args);
argv[1] = "@" RESPONSE_FILE;
argv[2] = NULL;
}
else
{
argv[1] = NULL;
}
execv(argv[0], argv);
exit(-1);
}
// Execute the specified executable contained in the same directory
// as the launcher, with the specified arguments.
void ExecuteProgram(const char *executable, const char *iwad, const char *args)
{
pid_t childpid;
childpid = fork();
if (childpid == 0)
{
signal(SIGCHLD, SIG_DFL);
DoExec(executable, iwad, args);
}
else
{
signal(SIGCHLD, SIG_IGN);
}
}
|
