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
|
/*
* FILE: process.c
* PROGRAM: RAT - controller
* AUTHOR: Colin Perkins / Orion Hodson
*
* Copyright (c) 1999-2001 University College London
* All rights reserved.
*/
#ifndef HIDE_SOURCE_STRINGS
static const char cvsid[] = "$Id";
#endif /* HIDE_SOURCE_STRINGS */
#include "config_unix.h"
#include "config_win32.h"
#include "debug.h"
#include "mbus.h"
#include "process.h"
void fork_process(char *proc_name, char *ctrl_addr, pid_t *pid, int num_tokens, char *token[2])
{
#ifdef WIN32
char args[1024];
LPSTARTUPINFO startup_info;
LPPROCESS_INFORMATION proc_info;
startup_info = (LPSTARTUPINFO) xmalloc(sizeof(STARTUPINFO));
startup_info->cb = sizeof(STARTUPINFO);
startup_info->lpReserved = 0;
startup_info->lpDesktop = 0;
startup_info->lpTitle = 0;
startup_info->dwX = 0;
startup_info->dwY = 0;
startup_info->dwXSize = 0;
startup_info->dwYSize = 0;
startup_info->dwXCountChars = 0;
startup_info->dwYCountChars = 0;
startup_info->dwFillAttribute = 0;
startup_info->dwFlags = 0;
startup_info->wShowWindow = 0;
startup_info->cbReserved2 = 0;
startup_info->lpReserved2 = 0;
startup_info->hStdInput = 0;
startup_info->hStdOutput = 0;
startup_info->hStdError = 0;
proc_info = (LPPROCESS_INFORMATION) xmalloc(sizeof(PROCESS_INFORMATION));
if (num_tokens == 1) {
sprintf(args, "%s -ctrl \"%s\" -token %s", proc_name, ctrl_addr, token[0]);
} else {
sprintf(args, "%s -T -ctrl \"%s\" -token %s -token %s", proc_name, ctrl_addr, token[0], token[1]);
}
if (!CreateProcess(NULL, args, NULL, NULL, TRUE, 0, NULL, NULL, startup_info, proc_info)) {
perror("Couldn't create process");
abort();
}
*pid = (pid_t) proc_info->hProcess; /* Sigh, hope a HANDLE fits into 32 bits... */
debug_msg("Forked %s\n", proc_name);
#else /* ...we're on unix */
char *path, *path_env;
#ifdef DEBUG_FORK
if (num_tokens == 1) {
debug_msg("%s -ctrl '%s' -token %s\n", proc_name, ctrl_addr, token[0]);
} else {
debug_msg("%s -T -ctrl '%s' -token %s -token %s\n", proc_name, ctrl_addr, token[0], token[1]);
}
UNUSED(pid);
#else
if ((getuid() != 0) && (geteuid() != 0)) {
/* Ensure that the current directory is in the PATH. This is a security */
/* problem, but reduces the number of support calls we get... */
path = getenv("PATH");
if (path == NULL) {
path_env = (char *) xmalloc(8);
sprintf(path_env, "PATH=.");
} else {
path_env = (char *) xmalloc(strlen(path) + 8);
sprintf(path_env, "PATH=%s:.", path);
}
debug_msg("%s\n", path_env);
putenv(path_env);
/* NOTE: we MUST NOT free the memory allocated to path_env. In some */
/* cases the string passed to putenv() becomes part of the environment */
/* and hence freeing the memory removes PATH from the environment. */
} else {
debug_msg("Running as root? PATH unmodified\n");
}
/* Fork off the sub-process... */
*pid = fork();
if (*pid == -1) {
perror("Cannot fork");
abort();
} else if (*pid == 0) {
if (num_tokens == 1) {
execlp(proc_name, proc_name, "-ctrl", ctrl_addr, "-token", token[0], NULL);
} else {
execlp(proc_name, proc_name, "-T", "-ctrl", ctrl_addr, "-token", token[0], "-token", token[1], NULL);
}
perror("Cannot execute subprocess");
/* Note: this MUST NOT be exit() or abort(), since they affect the standard */
/* IO channels in the parent process (fork duplicates file descriptors, but */
/* they still point to the same underlying file). */
_exit(1);
}
#endif
#endif
}
void kill_process(pid_t proc)
{
if (proc == 0) {
debug_msg("Process already dead\n", proc);
return;
}
debug_msg("Killing process %d\n", proc);
#ifdef WIN32
/* This doesn't close down DLLs or free resources, so we have to */
/* hope it doesn't get called. With any luck everything is closed */
/* down by sending it an mbus.exit() message, anyway... */
TerminateProcess((HANDLE) proc, 0);
#else
kill(proc, SIGINT);
#endif
}
|