1 | /* |
1 | /* |
2 | util.C -- process management and other utility functions |
2 | util.C -- process management and other utility functions |
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3 | Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
3 | |
4 | |
4 | Some of these are taken from tinc, see the AUTHORS file. |
5 | Some of these are taken from tinc, see the AUTHORS file. |
5 | |
6 | |
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7 | This file is part of GVPE. |
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8 | |
6 | This program is free software; you can redistribute it and/or modify |
9 | GVPE is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by |
10 | 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 |
11 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. |
12 | (at your option) any later version. |
10 | |
13 | |
11 | This program is distributed in the hope that it will be useful, |
14 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | GNU General Public License for more details. |
17 | GNU General Public License for more details. |
15 | |
18 | |
16 | You should have received a copy of the GNU General Public License |
19 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software |
20 | along with gvpe; if not, write to the Free Software |
18 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
21 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ |
22 | */ |
20 | |
23 | |
21 | #include "config.h" |
24 | #include "config.h" |
22 | |
25 | |
23 | #include <cstdio> |
26 | #include <cstdio> |
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27 | #include <cstdlib> |
24 | #include <cstring> |
28 | #include <cstring> |
25 | |
29 | |
26 | #include <errno.h> |
30 | #include <errno.h> |
27 | #include <signal.h> |
31 | #include <signal.h> |
28 | #include <sys/types.h> |
32 | #include <sys/types.h> |
29 | #include <sys/wait.h> |
33 | #include <sys/wait.h> |
30 | #include <unistd.h> |
34 | #include <unistd.h> |
31 | #include <time.h> |
35 | #include <time.h> |
32 | #include <sys/socket.h> |
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33 | #include <netinet/in.h> |
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34 | #include <arpa/inet.h> |
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35 | |
36 | |
36 | |
37 | #include "netcompat.h" |
37 | #include <sys/mman.h> |
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38 | |
38 | |
39 | #include "gettext.h" |
39 | #include "gettext.h" |
40 | #include "pidfile.h" |
40 | #include "pidfile.h" |
41 | #include "dropin.h" |
41 | #include "dropin.h" |
42 | |
42 | |
… | |
… | |
48 | int |
48 | int |
49 | write_pidfile (void) |
49 | write_pidfile (void) |
50 | { |
50 | { |
51 | int pid; |
51 | int pid; |
52 | |
52 | |
53 | pid = check_pid (pidfilename); |
53 | pid = check_pid (conf.pidfilename); |
54 | |
54 | |
55 | if (pid) |
55 | if (pid) |
56 | { |
56 | { |
57 | fprintf (stderr, _("A vped is already running with pid %d.\n"), pid); |
57 | fprintf (stderr, _("A gvpe daemon is already running with pid %d.\n"), pid); |
58 | return 1; |
58 | return 1; |
59 | } |
59 | } |
60 | |
60 | |
61 | /* if it's locked, write-protected, or whatever */ |
61 | /* if it's locked, write-protected, or whatever */ |
62 | if (!write_pid (pidfilename)) |
62 | if (!write_pid (conf.pidfilename)) |
63 | return 1; |
63 | return 1; |
64 | |
64 | |
65 | return 0; |
65 | return 0; |
66 | } |
66 | } |
67 | |
67 | |
68 | int |
68 | int |
69 | kill_other (int signal) |
69 | kill_other (int signal) |
70 | { |
70 | { |
71 | int pid; |
71 | int pid; |
72 | |
72 | |
73 | pid = read_pid (pidfilename); |
73 | pid = read_pid (conf.pidfilename); |
74 | |
74 | |
75 | if (!pid) |
75 | if (!pid) |
76 | { |
76 | { |
77 | fprintf (stderr, _("No other vped is running.\n")); |
77 | fprintf (stderr, _("No other gvpe daemon is running.\n")); |
78 | return 1; |
78 | return 1; |
79 | } |
79 | } |
80 | |
80 | |
81 | errno = 0; /* No error, sometimes errno is only changed on error */ |
81 | errno = 0; /* No error, sometimes errno is only changed on error */ |
82 | |
82 | |
83 | /* ESRCH is returned when no process with that pid is found */ |
83 | /* ESRCH is returned when no process with that pid is found */ |
84 | if (kill (pid, signal) && errno == ESRCH) |
84 | if (kill (pid, signal) && errno == ESRCH) |
85 | { |
85 | { |
86 | fprintf (stderr, _("The vped is no longer running. ")); |
86 | fprintf (stderr, _("The gvpe daemon is no longer running. ")); |
87 | |
87 | |
88 | fprintf (stderr, _("Removing stale lock file.\n")); |
88 | fprintf (stderr, _("Removing stale lock file.\n")); |
89 | remove_pid (pidfilename); |
89 | remove_pid (conf.pidfilename); |
90 | } |
90 | } |
91 | |
91 | |
92 | return 0; |
92 | return 0; |
93 | } |
93 | } |
94 | |
94 | |
… | |
… | |
114 | return -1; |
114 | return -1; |
115 | } |
115 | } |
116 | |
116 | |
117 | /* Now UPDATE the pid in the pidfile, because we changed it... */ |
117 | /* Now UPDATE the pid in the pidfile, because we changed it... */ |
118 | |
118 | |
119 | if (!write_pid (pidfilename)) |
119 | if (!write_pid (conf.pidfilename)) |
120 | return -1; |
120 | return -1; |
121 | |
121 | |
122 | log_to (LOGTO_SYSLOG); |
122 | log_to (LOGTO_SYSLOG); |
123 | } |
123 | } |
124 | else |
124 | else |
125 | log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
125 | log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
126 | |
126 | |
127 | slog (L_INFO, _("vped %s (%s %s) starting"), VERSION, __DATE__, __TIME__); |
127 | slog (L_INFO, _("gvpe daemon %s (%s %s) starting"), VERSION, __DATE__, __TIME__); |
128 | |
128 | |
129 | return 0; |
129 | return 0; |
130 | } |
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131 | |
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132 | void |
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133 | make_names (void) |
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134 | { |
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135 | if (!pidfilename) |
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136 | pidfilename = LOCALSTATEDIR "/run/vped.pid"; |
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137 | |
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138 | if (!confbase) |
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139 | asprintf (&confbase, "%s/vpe", CONFDIR); |
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140 | } |
130 | } |
141 | |
131 | |
142 | void run_script (const run_script_cb &cb, bool wait) |
132 | void run_script (const run_script_cb &cb, bool wait) |
143 | { |
133 | { |
144 | int pid; |
134 | int pid; |
… | |
… | |
146 | if ((pid = fork ()) == 0) |
136 | if ((pid = fork ()) == 0) |
147 | { |
137 | { |
148 | char *filename; |
138 | char *filename; |
149 | asprintf (&filename, "%s/%s", confbase, cb()); |
139 | asprintf (&filename, "%s/%s", confbase, cb()); |
150 | execl (filename, filename, (char *) 0); |
140 | execl (filename, filename, (char *) 0); |
151 | exit (255); |
141 | exit (126); |
152 | } |
142 | } |
153 | else if (pid > 0) |
143 | else if (pid > 0) |
154 | { |
144 | { |
155 | if (wait) |
145 | if (wait) |
156 | { |
146 | { |
… | |
… | |
206 | |
196 | |
207 | return res; |
197 | return res; |
208 | } |
198 | } |
209 | #endif |
199 | #endif |
210 | |
200 | |
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201 | void |
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202 | id2mac (unsigned int id, void *m) |
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203 | { |
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204 | mac &p = *(mac *)m; |
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205 | |
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206 | if (id) |
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207 | { |
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208 | p[0] = 0xfe; |
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209 | p[1] = 0xfd; |
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210 | p[2] = 0x80; |
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211 | p[3] = 0x00; |
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212 | p[4] = id >> 8; |
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213 | p[5] = id; |
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214 | } |
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215 | else |
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216 | { |
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217 | p[0] = 0xff; |
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218 | p[1] = 0xff; |
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219 | p[2] = 0xff; |
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220 | p[3] = 0xff; |
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221 | p[4] = 0xff; |
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222 | p[5] = 0xff; |
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223 | } |
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224 | } |
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225 | |