| 1 |
/* |
| 2 |
util.C -- process management and other utility functions |
| 3 |
|
| 4 |
Some of these are taken from tinc, see the AUTHORS file. |
| 5 |
|
| 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 <sys/wait.h> |
| 30 |
#include <unistd.h> |
| 31 |
#include <time.h> |
| 32 |
|
| 33 |
#include <sys/mman.h> |
| 34 |
|
| 35 |
#include "netcompat.h" |
| 36 |
|
| 37 |
#include "gettext.h" |
| 38 |
#include "pidfile.h" |
| 39 |
#include "dropin.h" |
| 40 |
|
| 41 |
#include "global.h" |
| 42 |
#include "conf.h" |
| 43 |
#include "util.h" |
| 44 |
#include "slog.h" |
| 45 |
|
| 46 |
int |
| 47 |
write_pidfile (void) |
| 48 |
{ |
| 49 |
int pid; |
| 50 |
|
| 51 |
pid = check_pid (pidfilename); |
| 52 |
|
| 53 |
if (pid) |
| 54 |
{ |
| 55 |
fprintf (stderr, _("A vped is already running with pid %d.\n"), pid); |
| 56 |
return 1; |
| 57 |
} |
| 58 |
|
| 59 |
/* if it's locked, write-protected, or whatever */ |
| 60 |
if (!write_pid (pidfilename)) |
| 61 |
return 1; |
| 62 |
|
| 63 |
return 0; |
| 64 |
} |
| 65 |
|
| 66 |
int |
| 67 |
kill_other (int signal) |
| 68 |
{ |
| 69 |
int pid; |
| 70 |
|
| 71 |
pid = read_pid (pidfilename); |
| 72 |
|
| 73 |
if (!pid) |
| 74 |
{ |
| 75 |
fprintf (stderr, _("No other vped is running.\n")); |
| 76 |
return 1; |
| 77 |
} |
| 78 |
|
| 79 |
errno = 0; /* No error, sometimes errno is only changed on error */ |
| 80 |
|
| 81 |
/* ESRCH is returned when no process with that pid is found */ |
| 82 |
if (kill (pid, signal) && errno == ESRCH) |
| 83 |
{ |
| 84 |
fprintf (stderr, _("The vped is no longer running. ")); |
| 85 |
|
| 86 |
fprintf (stderr, _("Removing stale lock file.\n")); |
| 87 |
remove_pid (pidfilename); |
| 88 |
} |
| 89 |
|
| 90 |
return 0; |
| 91 |
} |
| 92 |
|
| 93 |
int |
| 94 |
detach (int do_detach) |
| 95 |
{ |
| 96 |
/* First check if we can open a fresh new pidfile */ |
| 97 |
|
| 98 |
if (write_pidfile ()) |
| 99 |
return -1; |
| 100 |
|
| 101 |
/* If we succeeded in doing that, detach */ |
| 102 |
|
| 103 |
log_to (0); |
| 104 |
|
| 105 |
if (do_detach) |
| 106 |
{ |
| 107 |
if (daemon (0, 0) < 0) |
| 108 |
{ |
| 109 |
log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
| 110 |
|
| 111 |
slog (L_ERR, _("couldn't detach from terminal: %s"), strerror (errno)); |
| 112 |
return -1; |
| 113 |
} |
| 114 |
|
| 115 |
/* Now UPDATE the pid in the pidfile, because we changed it... */ |
| 116 |
|
| 117 |
if (!write_pid (pidfilename)) |
| 118 |
return -1; |
| 119 |
|
| 120 |
log_to (LOGTO_SYSLOG); |
| 121 |
} |
| 122 |
else |
| 123 |
log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
| 124 |
|
| 125 |
slog (L_INFO, _("vped %s (%s %s) starting"), VERSION, __DATE__, __TIME__); |
| 126 |
|
| 127 |
return 0; |
| 128 |
} |
| 129 |
|
| 130 |
void |
| 131 |
make_names (void) |
| 132 |
{ |
| 133 |
if (!pidfilename) |
| 134 |
pidfilename = LOCALSTATEDIR "/run/vped.pid"; |
| 135 |
|
| 136 |
if (!confbase) |
| 137 |
asprintf (&confbase, "%s/vpe", CONFDIR); |
| 138 |
} |
| 139 |
|
| 140 |
void run_script (const run_script_cb &cb, bool wait) |
| 141 |
{ |
| 142 |
int pid; |
| 143 |
|
| 144 |
if ((pid = fork ()) == 0) |
| 145 |
{ |
| 146 |
char *filename; |
| 147 |
asprintf (&filename, "%s/%s", confbase, cb()); |
| 148 |
execl (filename, filename, (char *) 0); |
| 149 |
exit (255); |
| 150 |
} |
| 151 |
else if (pid > 0) |
| 152 |
{ |
| 153 |
if (wait) |
| 154 |
{ |
| 155 |
waitpid (pid, 0, 0); |
| 156 |
/* TODO: check status */ |
| 157 |
} |
| 158 |
} |
| 159 |
} |
| 160 |
|
| 161 |
#if ENABLE_HTTP_PROXY |
| 162 |
// works like strdup |
| 163 |
u8 * |
| 164 |
base64_encode (const u8 *data, unsigned int len) |
| 165 |
{ |
| 166 |
const static char base64[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
| 167 |
|
| 168 |
unsigned int t, i; |
| 169 |
const u8 *end = data + len; |
| 170 |
u8 *res = new u8 [4 * ((len + 2) / 3) + 1]; |
| 171 |
u8 *out = res; |
| 172 |
|
| 173 |
while (data <= end - 3) |
| 174 |
{ |
| 175 |
t = (((data[0] << 8) | data[1]) << 8) | data[2]; |
| 176 |
data += 3; |
| 177 |
|
| 178 |
*out++ = base64[(t >> 18) & 0x3f]; |
| 179 |
*out++ = base64[(t >> 12) & 0x3f]; |
| 180 |
*out++ = base64[(t >> 6) & 0x3f]; |
| 181 |
*out++ = base64[(t ) & 0x3f]; |
| 182 |
} |
| 183 |
|
| 184 |
for (t = 0, i = 0; data < end; i++) |
| 185 |
t = (t << 8) | *data++; |
| 186 |
|
| 187 |
switch (i) |
| 188 |
{ |
| 189 |
case 2: |
| 190 |
*out++ = base64[(t >> 10) & 0x3f]; |
| 191 |
*out++ = base64[(t >> 4) & 0x3f]; |
| 192 |
*out++ = base64[(t << 2) & 0x3f]; |
| 193 |
*out++ = '='; |
| 194 |
break; |
| 195 |
case 1: |
| 196 |
*out++ = base64[(t >> 2) & 0x3f]; |
| 197 |
*out++ = base64[(t << 4) & 0x3f]; |
| 198 |
*out++ = '='; |
| 199 |
*out++ = '='; |
| 200 |
break; |
| 201 |
} |
| 202 |
|
| 203 |
*out++ = 0; |
| 204 |
|
| 205 |
return res; |
| 206 |
} |
| 207 |
#endif |
| 208 |
|
