1 |
pcg |
1.1 |
/* |
2 |
|
|
util.C -- process management and other utility functions |
3 |
|
|
|
4 |
pcg |
1.3 |
Some of these are taken from tinc, see the AUTHORS file. |
5 |
pcg |
1.1 |
|
6 |
|
|
This program is free software; you can redistribute it and/or modify |
7 |
|
|
it under the terms of the GNU General Public License as published by |
8 |
|
|
the Free Software Foundation; either version 2 of the License, or |
9 |
|
|
(at your option) any later version. |
10 |
|
|
|
11 |
|
|
This program is distributed in the hope that it will be useful, |
12 |
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 |
|
|
GNU General Public License for more details. |
15 |
|
|
|
16 |
|
|
You should have received a copy of the GNU General Public License |
17 |
|
|
along with this program; if not, write to the Free Software |
18 |
|
|
Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 |
|
|
*/ |
20 |
|
|
|
21 |
|
|
#include "config.h" |
22 |
|
|
|
23 |
|
|
#include <cstdio> |
24 |
|
|
#include <cstring> |
25 |
|
|
|
26 |
|
|
#include <errno.h> |
27 |
|
|
#include <signal.h> |
28 |
|
|
#include <sys/types.h> |
29 |
|
|
#include <unistd.h> |
30 |
|
|
#include <time.h> |
31 |
|
|
#include <sys/socket.h> |
32 |
|
|
#include <netinet/in.h> |
33 |
|
|
#include <arpa/inet.h> |
34 |
|
|
|
35 |
|
|
#include <sys/mman.h> |
36 |
|
|
|
37 |
|
|
#include <openssl/rand.h> |
38 |
|
|
#include <openssl/rsa.h> |
39 |
|
|
#include <openssl/pem.h> |
40 |
|
|
#include <openssl/evp.h> |
41 |
|
|
|
42 |
|
|
#include "gettext.h" |
43 |
|
|
#include "pidfile.h" |
44 |
|
|
#include "dropin.h" |
45 |
|
|
|
46 |
|
|
#include "global.h" |
47 |
|
|
#include "conf.h" |
48 |
|
|
#include "slog.h" |
49 |
|
|
#include "protocol.h" |
50 |
|
|
|
51 |
|
|
int |
52 |
|
|
write_pidfile (void) |
53 |
|
|
{ |
54 |
|
|
int pid; |
55 |
|
|
|
56 |
|
|
pid = check_pid (pidfilename); |
57 |
|
|
|
58 |
|
|
if (pid) |
59 |
|
|
{ |
60 |
|
|
fprintf (stderr, _("A vped is already running with pid %d.\n"), pid); |
61 |
|
|
return 1; |
62 |
|
|
} |
63 |
|
|
|
64 |
|
|
/* if it's locked, write-protected, or whatever */ |
65 |
|
|
if (!write_pid (pidfilename)) |
66 |
|
|
return 1; |
67 |
|
|
|
68 |
|
|
return 0; |
69 |
|
|
} |
70 |
|
|
|
71 |
|
|
int |
72 |
|
|
kill_other (int signal) |
73 |
|
|
{ |
74 |
|
|
int pid; |
75 |
|
|
|
76 |
|
|
pid = read_pid (pidfilename); |
77 |
|
|
|
78 |
|
|
if (!pid) |
79 |
|
|
{ |
80 |
|
|
fprintf (stderr, _("No other vped is running.\n")); |
81 |
|
|
return 1; |
82 |
|
|
} |
83 |
|
|
|
84 |
|
|
errno = 0; /* No error, sometimes errno is only changed on error */ |
85 |
|
|
|
86 |
|
|
/* ESRCH is returned when no process with that pid is found */ |
87 |
|
|
if (kill (pid, signal) && errno == ESRCH) |
88 |
|
|
{ |
89 |
|
|
fprintf (stderr, _("The vped is no longer running. ")); |
90 |
|
|
|
91 |
|
|
fprintf (stderr, _("Removing stale lock file.\n")); |
92 |
|
|
remove_pid (pidfilename); |
93 |
|
|
} |
94 |
|
|
|
95 |
|
|
return 0; |
96 |
|
|
} |
97 |
|
|
|
98 |
|
|
int |
99 |
|
|
detach (int do_detach) |
100 |
|
|
{ |
101 |
|
|
/* First check if we can open a fresh new pidfile */ |
102 |
|
|
|
103 |
|
|
if (write_pidfile ()) |
104 |
|
|
return -1; |
105 |
|
|
|
106 |
|
|
/* If we succeeded in doing that, detach */ |
107 |
|
|
|
108 |
|
|
log_to (0); |
109 |
|
|
|
110 |
|
|
if (do_detach) |
111 |
|
|
{ |
112 |
|
|
if (daemon (0, 0) < 0) |
113 |
|
|
{ |
114 |
|
|
log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
115 |
|
|
|
116 |
|
|
slog (L_ERR, _("couldn't detach from terminal: %s"), strerror (errno)); |
117 |
|
|
return -1; |
118 |
|
|
} |
119 |
|
|
|
120 |
|
|
/* Now UPDATE the pid in the pidfile, because we changed it... */ |
121 |
|
|
|
122 |
|
|
if (!write_pid (pidfilename)) |
123 |
|
|
return -1; |
124 |
|
|
|
125 |
|
|
log_to (LOGTO_SYSLOG); |
126 |
|
|
} |
127 |
|
|
else |
128 |
|
|
log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
129 |
|
|
|
130 |
|
|
slog (L_INFO, _("vped %s (%s %s) starting"), VERSION, __DATE__, __TIME__); |
131 |
|
|
|
132 |
|
|
return 0; |
133 |
|
|
} |
134 |
|
|
|
135 |
|
|
void |
136 |
|
|
make_names (void) |
137 |
|
|
{ |
138 |
|
|
if (!pidfilename) |
139 |
|
|
pidfilename = LOCALSTATEDIR "/run/vped.pid"; |
140 |
|
|
|
141 |
|
|
if (!confbase) |
142 |
|
|
asprintf (&confbase, "%s/vpe", CONFDIR); |
143 |
|
|
} |
144 |
|
|
|