author | Matthew Wild <mwild1@gmail.com> |
Sun, 15 Feb 2009 15:56:04 +0000 | |
changeset 804 | 9bc1544c99b7 |
parent 796 | 63f56696c66c |
child 859 | 43f7e342135d |
permissions | -rw-r--r-- |
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/* Prosody IM v0.3 |
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-- Copyright (C) 2008-2009 Matthew Wild |
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-- Copyright (C) 2008-2009 Waqas Hussain |
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-- |
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-- This project is MIT/X11 licensed. Please see the |
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-- COPYING file in the source package for more information. |
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-- |
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*/ |
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/* |
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* pposix.c |
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* POSIX support functions for Lua |
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*/ |
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#define MODULE_VERSION "0.3.0" |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <libgen.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#include <syslog.h> |
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#include <pwd.h> |
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#include <string.h> |
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#include <errno.h> |
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#include "lua.h" |
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#include "lauxlib.h" |
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/* Daemonization support */ |
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static int lc_daemonize(lua_State *L) |
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{ |
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pid_t pid; |
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if ( getppid() == 1 ) |
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{ |
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lua_pushboolean(L, 0); |
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lua_pushstring(L, "already-daemonized"); |
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return 2; |
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} |
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/* Attempt initial fork */ |
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if((pid = fork()) < 0) |
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{ |
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/* Forking failed */ |
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lua_pushboolean(L, 0); |
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lua_pushstring(L, "fork-failed"); |
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return 2; |
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} |
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else if(pid != 0) |
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{ |
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/* We are the parent process */ |
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lua_pushboolean(L, 1); |
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lua_pushnumber(L, pid); |
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return 2; |
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} |
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/* and we are the child process */ |
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if(setsid() == -1) |
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{ |
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/* We failed to become session leader */ |
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/* (we probably already were) */ |
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lua_pushboolean(L, 0); |
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lua_pushstring(L, "setsid-failed"); |
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return 2; |
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} |
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/* Close stdin, stdout, stderr */ |
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/* close(0); |
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close(1); |
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close(2); |
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*/ |
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/* Final fork, use it wisely */ |
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if(fork()) |
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exit(0); |
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/* Show's over, let's continue */ |
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lua_pushboolean(L, 1); |
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lua_pushnil(L); |
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return 2; |
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} |
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/* Syslog support */ |
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const char * const facility_strings[] = { |
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"auth", |
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"authpriv", |
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"cron", |
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"daemon", |
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"ftp", |
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"kern", |
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"local0", |
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"local1", |
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"local2", |
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"local3", |
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"local4", |
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"local5", |
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"local6", |
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"local7", |
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"lpr", |
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"mail", |
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"syslog", |
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"user", |
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"uucp", |
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NULL |
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}; |
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int facility_constants[] = { |
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LOG_AUTH, |
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LOG_AUTHPRIV, |
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LOG_CRON, |
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LOG_DAEMON, |
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LOG_FTP, |
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LOG_KERN, |
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LOG_LOCAL0, |
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119 |
LOG_LOCAL1, |
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120 |
LOG_LOCAL2, |
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121 |
LOG_LOCAL3, |
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122 |
LOG_LOCAL4, |
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123 |
LOG_LOCAL5, |
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124 |
LOG_LOCAL6, |
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125 |
LOG_LOCAL7, |
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126 |
LOG_LPR, |
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127 |
LOG_MAIL, |
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128 |
LOG_NEWS, |
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129 |
LOG_SYSLOG, |
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130 |
LOG_USER, |
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131 |
LOG_UUCP, |
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132 |
-1 |
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133 |
}; |
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|
134 |
|
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|
135 |
/* " |
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136 |
The parameter ident in the call of openlog() is probably stored as-is. |
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|
137 |
Thus, if the string it points to is changed, syslog() may start |
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|
138 |
prepending the changed string, and if the string it points to ceases to |
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139 |
exist, the results are undefined. Most portable is to use a string |
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140 |
constant. |
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|
141 |
" -- syslog manpage |
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142 |
*/ |
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|
143 |
char* syslog_ident = NULL; |
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144 |
|
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|
145 |
int lc_syslog_open(lua_State* L) |
722
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146 |
{ |
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147 |
int facility = luaL_checkoption(L, 2, "daemon", facility_strings); |
722
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148 |
facility = facility_constants[facility]; |
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|
149 |
|
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150 |
luaL_checkstring(L, 1); |
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|
151 |
|
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152 |
if(syslog_ident) |
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153 |
free(syslog_ident); |
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|
154 |
|
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|
155 |
syslog_ident = strdup(lua_tostring(L, 1)); |
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|
156 |
|
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|
157 |
openlog(syslog_ident, LOG_PID, facility); |
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|
158 |
return 0; |
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|
159 |
} |
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|
160 |
|
796
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|
161 |
const char * const level_strings[] = { |
722
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|
162 |
"debug", |
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|
163 |
"info", |
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|
164 |
"notice", |
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|
165 |
"warn", |
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|
166 |
"error", |
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|
167 |
NULL |
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|
168 |
}; |
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|
169 |
int level_constants[] = { |
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170 |
LOG_DEBUG, |
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|
171 |
LOG_INFO, |
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|
172 |
LOG_NOTICE, |
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|
173 |
LOG_WARNING, |
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|
174 |
LOG_EMERG, |
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|
175 |
-1 |
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|
176 |
}; |
723
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mod_posix/pposix: Fix reporting of incorrect PID on daemonization. Log correct PID, and support writing a pidfile (pidfile = '/path/to/prosody.pid' in config). Added getpid() to pposix and improved function names.
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diff
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|
177 |
int lc_syslog_log(lua_State* L) |
722
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178 |
{ |
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63f56696c66c
util.pposix: Fix incompatible pointer type compiler warnings
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|
179 |
int level = luaL_checkoption(L, 1, "notice", level_strings); |
722
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|
180 |
level = level_constants[level]; |
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|
181 |
|
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|
182 |
luaL_checkstring(L, 2); |
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|
183 |
|
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|
184 |
syslog(level, "%s", lua_tostring(L, 2)); |
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|
185 |
return 0; |
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|
186 |
} |
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|
187 |
|
723
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mod_posix/pposix: Fix reporting of incorrect PID on daemonization. Log correct PID, and support writing a pidfile (pidfile = '/path/to/prosody.pid' in config). Added getpid() to pposix and improved function names.
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|
188 |
int lc_syslog_close(lua_State* L) |
722
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189 |
{ |
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|
190 |
closelog(); |
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|
191 |
if(syslog_ident) |
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192 |
{ |
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193 |
free(syslog_ident); |
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|
194 |
syslog_ident = NULL; |
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195 |
} |
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|
196 |
return 0; |
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|
197 |
} |
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|
198 |
|
729
f62ef65d5c01
pposix: Add syslog_setmask (use config: minimum_log_level = 'warn' etc.)
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|
199 |
int lc_syslog_setmask(lua_State* L) |
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|
200 |
{ |
796
63f56696c66c
util.pposix: Fix incompatible pointer type compiler warnings
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parents:
766
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|
201 |
int level_idx = luaL_checkoption(L, 1, "notice", level_strings); |
729
f62ef65d5c01
pposix: Add syslog_setmask (use config: minimum_log_level = 'warn' etc.)
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diff
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|
202 |
int mask = 0; |
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|
203 |
do |
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|
204 |
{ |
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|
205 |
mask |= LOG_MASK(level_constants[level_idx]); |
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|
206 |
} while (++level_idx<=4); |
f62ef65d5c01
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diff
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|
207 |
|
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|
208 |
setlogmask(mask); |
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|
209 |
return 0; |
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|
210 |
} |
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diff
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|
211 |
|
723
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|
212 |
/* getpid */ |
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parents:
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diff
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|
213 |
|
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|
214 |
int lc_getpid(lua_State* L) |
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|
215 |
{ |
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|
216 |
lua_pushinteger(L, getpid()); |
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|
217 |
return 1; |
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|
218 |
} |
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|
219 |
|
804
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
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diff
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|
220 |
/* UID/GID functions */ |
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util.pposix: Add getuid/setuid (we don't use them yet)
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|
221 |
|
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222 |
int lc_getuid(lua_State* L) |
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223 |
{ |
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224 |
lua_pushinteger(L, getuid()); |
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225 |
return 1; |
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226 |
} |
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|
227 |
|
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|
228 |
int lc_getgid(lua_State* L) |
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229 |
{ |
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230 |
lua_pushinteger(L, getgid()); |
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|
231 |
return 1; |
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|
232 |
} |
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|
233 |
|
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|
234 |
int lc_setuid(lua_State* L) |
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235 |
{ |
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|
236 |
int uid = -1; |
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|
237 |
if(lua_gettop(L) < 1) |
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|
238 |
return 0; |
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|
239 |
if(!lua_isnumber(L, 1) && lua_tostring(L, 1)) |
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240 |
{ |
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|
241 |
/* Passed UID is actually a string, so look up the UID */ |
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|
242 |
struct passwd *p; |
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243 |
p = getpwnam(lua_tostring(L, 1)); |
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244 |
if(!p) |
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245 |
{ |
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|
246 |
lua_pushboolean(L, 0); |
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|
247 |
lua_pushstring(L, "no-such-user"); |
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|
248 |
return 2; |
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|
249 |
} |
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|
250 |
uid = p->pw_uid; |
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|
251 |
} |
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|
252 |
else |
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|
253 |
{ |
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|
254 |
uid = lua_tonumber(L, 1); |
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|
255 |
} |
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changeset
|
256 |
|
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|
257 |
if(uid>-1) |
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|
258 |
{ |
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|
259 |
/* Ok, attempt setuid */ |
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|
260 |
errno = 0; |
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|
261 |
if(setuid(uid)) |
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|
262 |
{ |
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|
263 |
/* Fail */ |
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|
264 |
lua_pushboolean(L, 0); |
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|
265 |
switch(errno) |
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|
266 |
{ |
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|
267 |
case EINVAL: |
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|
268 |
lua_pushstring(L, "invalid-uid"); |
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|
269 |
break; |
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|
270 |
case EPERM: |
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|
271 |
lua_pushstring(L, "permission-denied"); |
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changeset
|
272 |
break; |
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|
273 |
default: |
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|
274 |
lua_pushstring(L, "unknown-error"); |
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|
275 |
} |
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changeset
|
276 |
return 2; |
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changeset
|
277 |
} |
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changeset
|
278 |
else |
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diff
changeset
|
279 |
{ |
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diff
changeset
|
280 |
/* Success! */ |
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changeset
|
281 |
lua_pushboolean(L, 1); |
9bc1544c99b7
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diff
changeset
|
282 |
return 1; |
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
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diff
changeset
|
283 |
} |
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
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diff
changeset
|
284 |
} |
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
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diff
changeset
|
285 |
|
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
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diff
changeset
|
286 |
/* Seems we couldn't find a valid UID to switch to */ |
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diff
changeset
|
287 |
lua_pushboolean(L, 0); |
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
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diff
changeset
|
288 |
lua_pushstring(L, "invalid-uid"); |
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
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diff
changeset
|
289 |
return 2; |
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
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diff
changeset
|
290 |
} |
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
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diff
changeset
|
291 |
|
723
c1e7d280c174
mod_posix/pposix: Fix reporting of incorrect PID on daemonization. Log correct PID, and support writing a pidfile (pidfile = '/path/to/prosody.pid' in config). Added getpid() to pposix and improved function names.
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diff
changeset
|
292 |
/* Register functions */ |
c1e7d280c174
mod_posix/pposix: Fix reporting of incorrect PID on daemonization. Log correct PID, and support writing a pidfile (pidfile = '/path/to/prosody.pid' in config). Added getpid() to pposix and improved function names.
Matthew Wild <mwild1@gmail.com>
parents:
722
diff
changeset
|
293 |
|
586
b828d7d47973
Add posix support library, and adjust makefiles for it
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
|
294 |
int luaopen_util_pposix(lua_State *L) |
b828d7d47973
Add posix support library, and adjust makefiles for it
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diff
changeset
|
295 |
{ |
b828d7d47973
Add posix support library, and adjust makefiles for it
Matthew Wild <mwild1@gmail.com>
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diff
changeset
|
296 |
lua_newtable(L); |
722
63456c9d0522
mod_posix: Support for logging to syslog (log = 'syslog' in config)
Matthew Wild <mwild1@gmail.com>
parents:
588
diff
changeset
|
297 |
|
723
c1e7d280c174
mod_posix/pposix: Fix reporting of incorrect PID on daemonization. Log correct PID, and support writing a pidfile (pidfile = '/path/to/prosody.pid' in config). Added getpid() to pposix and improved function names.
Matthew Wild <mwild1@gmail.com>
parents:
722
diff
changeset
|
298 |
lua_pushcfunction(L, lc_daemonize); |
586
b828d7d47973
Add posix support library, and adjust makefiles for it
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
|
299 |
lua_setfield(L, -2, "daemonize"); |
722
63456c9d0522
mod_posix: Support for logging to syslog (log = 'syslog' in config)
Matthew Wild <mwild1@gmail.com>
parents:
588
diff
changeset
|
300 |
|
723
c1e7d280c174
mod_posix/pposix: Fix reporting of incorrect PID on daemonization. Log correct PID, and support writing a pidfile (pidfile = '/path/to/prosody.pid' in config). Added getpid() to pposix and improved function names.
Matthew Wild <mwild1@gmail.com>
parents:
722
diff
changeset
|
301 |
lua_pushcfunction(L, lc_syslog_open); |
722
63456c9d0522
mod_posix: Support for logging to syslog (log = 'syslog' in config)
Matthew Wild <mwild1@gmail.com>
parents:
588
diff
changeset
|
302 |
lua_setfield(L, -2, "syslog_open"); |
63456c9d0522
mod_posix: Support for logging to syslog (log = 'syslog' in config)
Matthew Wild <mwild1@gmail.com>
parents:
588
diff
changeset
|
303 |
|
723
c1e7d280c174
mod_posix/pposix: Fix reporting of incorrect PID on daemonization. Log correct PID, and support writing a pidfile (pidfile = '/path/to/prosody.pid' in config). Added getpid() to pposix and improved function names.
Matthew Wild <mwild1@gmail.com>
parents:
722
diff
changeset
|
304 |
lua_pushcfunction(L, lc_syslog_close); |
722
63456c9d0522
mod_posix: Support for logging to syslog (log = 'syslog' in config)
Matthew Wild <mwild1@gmail.com>
parents:
588
diff
changeset
|
305 |
lua_setfield(L, -2, "syslog_close"); |
63456c9d0522
mod_posix: Support for logging to syslog (log = 'syslog' in config)
Matthew Wild <mwild1@gmail.com>
parents:
588
diff
changeset
|
306 |
|
723
c1e7d280c174
mod_posix/pposix: Fix reporting of incorrect PID on daemonization. Log correct PID, and support writing a pidfile (pidfile = '/path/to/prosody.pid' in config). Added getpid() to pposix and improved function names.
Matthew Wild <mwild1@gmail.com>
parents:
722
diff
changeset
|
307 |
lua_pushcfunction(L, lc_syslog_log); |
722
63456c9d0522
mod_posix: Support for logging to syslog (log = 'syslog' in config)
Matthew Wild <mwild1@gmail.com>
parents:
588
diff
changeset
|
308 |
lua_setfield(L, -2, "syslog_log"); |
63456c9d0522
mod_posix: Support for logging to syslog (log = 'syslog' in config)
Matthew Wild <mwild1@gmail.com>
parents:
588
diff
changeset
|
309 |
|
729
f62ef65d5c01
pposix: Add syslog_setmask (use config: minimum_log_level = 'warn' etc.)
Matthew Wild <mwild1@gmail.com>
parents:
727
diff
changeset
|
310 |
lua_pushcfunction(L, lc_syslog_setmask); |
f62ef65d5c01
pposix: Add syslog_setmask (use config: minimum_log_level = 'warn' etc.)
Matthew Wild <mwild1@gmail.com>
parents:
727
diff
changeset
|
311 |
lua_setfield(L, -2, "syslog_setminlevel"); |
f62ef65d5c01
pposix: Add syslog_setmask (use config: minimum_log_level = 'warn' etc.)
Matthew Wild <mwild1@gmail.com>
parents:
727
diff
changeset
|
312 |
|
723
c1e7d280c174
mod_posix/pposix: Fix reporting of incorrect PID on daemonization. Log correct PID, and support writing a pidfile (pidfile = '/path/to/prosody.pid' in config). Added getpid() to pposix and improved function names.
Matthew Wild <mwild1@gmail.com>
parents:
722
diff
changeset
|
313 |
lua_pushcfunction(L, lc_getpid); |
c1e7d280c174
mod_posix/pposix: Fix reporting of incorrect PID on daemonization. Log correct PID, and support writing a pidfile (pidfile = '/path/to/prosody.pid' in config). Added getpid() to pposix and improved function names.
Matthew Wild <mwild1@gmail.com>
parents:
722
diff
changeset
|
314 |
lua_setfield(L, -2, "getpid"); |
c1e7d280c174
mod_posix/pposix: Fix reporting of incorrect PID on daemonization. Log correct PID, and support writing a pidfile (pidfile = '/path/to/prosody.pid' in config). Added getpid() to pposix and improved function names.
Matthew Wild <mwild1@gmail.com>
parents:
722
diff
changeset
|
315 |
|
804
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
Matthew Wild <mwild1@gmail.com>
parents:
796
diff
changeset
|
316 |
lua_pushcfunction(L, lc_getuid); |
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
Matthew Wild <mwild1@gmail.com>
parents:
796
diff
changeset
|
317 |
lua_setfield(L, -2, "getuid"); |
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
Matthew Wild <mwild1@gmail.com>
parents:
796
diff
changeset
|
318 |
|
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
Matthew Wild <mwild1@gmail.com>
parents:
796
diff
changeset
|
319 |
lua_pushcfunction(L, lc_setuid); |
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
Matthew Wild <mwild1@gmail.com>
parents:
796
diff
changeset
|
320 |
lua_setfield(L, -2, "setuid"); |
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
Matthew Wild <mwild1@gmail.com>
parents:
796
diff
changeset
|
321 |
|
727
78c9542de94e
pposix: Add _NAME and _VERSION
Matthew Wild <mwild1@gmail.com>
parents:
723
diff
changeset
|
322 |
lua_pushliteral(L, "pposix"); |
78c9542de94e
pposix: Add _NAME and _VERSION
Matthew Wild <mwild1@gmail.com>
parents:
723
diff
changeset
|
323 |
lua_setfield(L, -2, "_NAME"); |
78c9542de94e
pposix: Add _NAME and _VERSION
Matthew Wild <mwild1@gmail.com>
parents:
723
diff
changeset
|
324 |
|
78c9542de94e
pposix: Add _NAME and _VERSION
Matthew Wild <mwild1@gmail.com>
parents:
723
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325 |
lua_pushliteral(L, MODULE_VERSION); |
78c9542de94e
pposix: Add _NAME and _VERSION
Matthew Wild <mwild1@gmail.com>
parents:
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326 |
lua_setfield(L, -2, "_VERSION"); |
78c9542de94e
pposix: Add _NAME and _VERSION
Matthew Wild <mwild1@gmail.com>
parents:
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changeset
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327 |
|
586
b828d7d47973
Add posix support library, and adjust makefiles for it
Matthew Wild <mwild1@gmail.com>
parents:
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changeset
|
328 |
return 1; |
b828d7d47973
Add posix support library, and adjust makefiles for it
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
|
329 |
}; |