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) 2003-2008 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 it |
7 | it under the terms of the GNU General Public License as published by |
10 | under the terms of the GNU General Public License as published by the |
8 | the Free Software Foundation; either version 2 of the License, or |
11 | Free Software Foundation; either version 3 of the License, or (at your |
9 | (at your option) any later version. |
12 | 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, but |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | 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 GNU General |
14 | GNU General Public License for more details. |
17 | 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 along |
17 | along with this program; if not, write to the Free Software |
20 | with this program; if not, see <http://www.gnu.org/licenses/>. |
18 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
21 | |
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22 | Additional permission under GNU GPL version 3 section 7 |
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23 | |
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24 | If you modify this Program, or any covered work, by linking or |
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25 | combining it with the OpenSSL project's OpenSSL library (or a modified |
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26 | version of that library), containing parts covered by the terms of the |
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27 | OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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28 | additional permission to convey the resulting work. Corresponding |
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29 | Source for a non-source form of such a combination shall include the |
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30 | source code for the parts of OpenSSL used as well as that of the |
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31 | covered work. |
19 | */ |
32 | */ |
20 | |
33 | |
21 | #include "config.h" |
34 | #include "config.h" |
22 | |
35 | |
23 | #include <cstdio> |
36 | #include <cstdio> |
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37 | #include <cstdlib> |
24 | #include <cstring> |
38 | #include <cstring> |
25 | |
39 | |
26 | #include <errno.h> |
40 | #include <errno.h> |
27 | #include <signal.h> |
41 | #include <signal.h> |
28 | #include <sys/types.h> |
42 | #include <sys/types.h> |
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44 | int |
58 | int |
45 | write_pidfile (void) |
59 | write_pidfile (void) |
46 | { |
60 | { |
47 | int pid; |
61 | int pid; |
48 | |
62 | |
49 | pid = check_pid (pidfilename); |
63 | pid = check_pid (conf.pidfilename); |
50 | |
64 | |
51 | if (pid) |
65 | if (pid) |
52 | { |
66 | { |
53 | fprintf (stderr, _("A vped is already running with pid %d.\n"), pid); |
67 | fprintf (stderr, _("A gvpe daemon is already running with pid %d.\n"), pid); |
54 | return 1; |
68 | return 1; |
55 | } |
69 | } |
56 | |
70 | |
57 | /* if it's locked, write-protected, or whatever */ |
71 | /* if it's locked, write-protected, or whatever */ |
58 | if (!write_pid (pidfilename)) |
72 | if (!write_pid (conf.pidfilename)) |
59 | return 1; |
73 | return 1; |
60 | |
74 | |
61 | return 0; |
75 | return 0; |
62 | } |
76 | } |
63 | |
77 | |
64 | int |
78 | int |
65 | kill_other (int signal) |
79 | kill_other (int signal) |
66 | { |
80 | { |
67 | int pid; |
81 | int pid; |
68 | |
82 | |
69 | pid = read_pid (pidfilename); |
83 | pid = read_pid (conf.pidfilename); |
70 | |
84 | |
71 | if (!pid) |
85 | if (!pid) |
72 | { |
86 | { |
73 | fprintf (stderr, _("No other vped is running.\n")); |
87 | fprintf (stderr, _("No other gvpe daemon is running.\n")); |
74 | return 1; |
88 | return 1; |
75 | } |
89 | } |
76 | |
90 | |
77 | errno = 0; /* No error, sometimes errno is only changed on error */ |
91 | errno = 0; /* No error, sometimes errno is only changed on error */ |
78 | |
92 | |
79 | /* ESRCH is returned when no process with that pid is found */ |
93 | /* ESRCH is returned when no process with that pid is found */ |
80 | if (kill (pid, signal) && errno == ESRCH) |
94 | if (kill (pid, signal) && errno == ESRCH) |
81 | { |
95 | { |
82 | fprintf (stderr, _("The vped is no longer running. ")); |
96 | fprintf (stderr, _("The gvpe daemon is no longer running. ")); |
83 | |
97 | |
84 | fprintf (stderr, _("Removing stale lock file.\n")); |
98 | fprintf (stderr, _("Removing stale lock file.\n")); |
85 | remove_pid (pidfilename); |
99 | remove_pid (conf.pidfilename); |
86 | } |
100 | } |
87 | |
101 | |
88 | return 0; |
102 | return 0; |
89 | } |
103 | } |
90 | |
104 | |
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110 | return -1; |
124 | return -1; |
111 | } |
125 | } |
112 | |
126 | |
113 | /* Now UPDATE the pid in the pidfile, because we changed it... */ |
127 | /* Now UPDATE the pid in the pidfile, because we changed it... */ |
114 | |
128 | |
115 | if (!write_pid (pidfilename)) |
129 | if (!write_pid (conf.pidfilename)) |
116 | return -1; |
130 | return -1; |
117 | |
131 | |
118 | log_to (LOGTO_SYSLOG); |
132 | log_to (LOGTO_SYSLOG); |
119 | } |
133 | } |
120 | else |
134 | else |
121 | log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
135 | log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
122 | |
136 | |
123 | slog (L_INFO, _("vped %s (%s %s) starting"), VERSION, __DATE__, __TIME__); |
137 | slog (L_INFO, _("gvpe daemon %s (%s %s) starting"), VERSION, __DATE__, __TIME__); |
124 | |
138 | |
125 | return 0; |
139 | return 0; |
126 | } |
140 | } |
127 | |
141 | |
128 | void |
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129 | make_names (void) |
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130 | { |
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131 | if (!pidfilename) |
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132 | pidfilename = LOCALSTATEDIR "/run/vped.pid"; |
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133 | |
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134 | if (!confbase) |
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135 | asprintf (&confbase, "%s/vpe", CONFDIR); |
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136 | } |
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137 | |
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138 | void run_script (const run_script_cb &cb, bool wait) |
142 | bool run_script (const run_script_cb &cb, bool wait) |
139 | { |
143 | { |
140 | int pid; |
144 | if (wait) |
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145 | signal (SIGCHLD, SIG_DFL); // this is extremely ugly, but I did not feel like implementing a complete wait() event logic. It's easier to write this long comment to make your editor happy. |
141 | |
146 | |
142 | if ((pid = fork ()) == 0) |
147 | int pid = fork (); |
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148 | |
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149 | if (pid == 0) |
143 | { |
150 | { |
144 | char *filename; |
151 | execl ("/bin/sh", "/bin/sh", "-c", cb (), (char *) 0); |
145 | asprintf (&filename, "%s/%s", confbase, cb()); |
152 | exit (EXIT_FAILURE); |
146 | execl (filename, filename, (char *) 0); |
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147 | exit (255); |
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148 | } |
153 | } |
149 | else if (pid > 0) |
154 | else if (pid > 0) |
150 | { |
155 | { |
151 | if (wait) |
156 | if (wait) |
152 | { |
157 | { |
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158 | int status; |
153 | waitpid (pid, 0, 0); |
159 | int res = waitpid (pid, &status, 0); |
154 | /* TODO: check status */ |
160 | |
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161 | signal (SIGCHLD, SIG_IGN); |
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162 | |
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163 | if (res < 0) |
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164 | { |
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165 | slog (L_WARN, _("waiting for an external command failed: %s."), |
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166 | strerror (errno)); |
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167 | return false; |
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168 | } |
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169 | else if (!WIFEXITED (status) || WEXITSTATUS (status) != EXIT_SUCCESS) |
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170 | { |
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171 | slog (L_WARN, _("external command returned with exit status %d (%04x)."), |
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172 | WEXITSTATUS (status), status); |
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173 | return false; |
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174 | } |
155 | } |
175 | } |
156 | } |
176 | } |
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177 | else |
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178 | { |
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179 | slog (L_ERR, _("unable to fork, exiting: %s"), strerror (errno)); |
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180 | exit (EXIT_FAILURE); |
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181 | } |
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182 | |
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183 | return true; |
157 | } |
184 | } |
158 | |
185 | |
159 | #if ENABLE_HTTP_PROXY |
186 | #if ENABLE_HTTP_PROXY |
160 | // works like strdup |
187 | // works like strdup |
161 | u8 * |
188 | u8 * |