author | Tobias Markmann <tm@ayena.de> |
Sun, 22 Feb 2009 20:35:41 +0100 | |
changeset 859 | 43f7e342135d |
parent 804 | 9bc1544c99b7 |
child 860 | 048aaec22b57 |
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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-- Copyright 2009 Tobias Markmann |
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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/resource.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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121 |
LOG_LOCAL1, |
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122 |
LOG_LOCAL2, |
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123 |
LOG_LOCAL3, |
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124 |
LOG_LOCAL4, |
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125 |
LOG_LOCAL5, |
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126 |
LOG_LOCAL6, |
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127 |
LOG_LOCAL7, |
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128 |
LOG_LPR, |
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129 |
LOG_MAIL, |
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130 |
LOG_NEWS, |
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131 |
LOG_SYSLOG, |
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132 |
LOG_USER, |
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133 |
LOG_UUCP, |
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134 |
-1 |
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135 |
}; |
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|
136 |
|
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|
137 |
/* " |
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138 |
The parameter ident in the call of openlog() is probably stored as-is. |
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139 |
Thus, if the string it points to is changed, syslog() may start |
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140 |
prepending the changed string, and if the string it points to ceases to |
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141 |
exist, the results are undefined. Most portable is to use a string |
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142 |
constant. |
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143 |
" -- syslog manpage |
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144 |
*/ |
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|
145 |
char* syslog_ident = NULL; |
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146 |
|
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|
147 |
int lc_syslog_open(lua_State* L) |
722
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148 |
{ |
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149 |
int facility = luaL_checkoption(L, 2, "daemon", facility_strings); |
722
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150 |
facility = facility_constants[facility]; |
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151 |
|
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152 |
luaL_checkstring(L, 1); |
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|
153 |
|
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154 |
if(syslog_ident) |
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155 |
free(syslog_ident); |
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|
156 |
|
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|
157 |
syslog_ident = strdup(lua_tostring(L, 1)); |
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|
158 |
|
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|
159 |
openlog(syslog_ident, LOG_PID, facility); |
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160 |
return 0; |
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|
161 |
} |
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|
162 |
|
796
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|
163 |
const char * const level_strings[] = { |
722
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|
164 |
"debug", |
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|
165 |
"info", |
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|
166 |
"notice", |
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|
167 |
"warn", |
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|
168 |
"error", |
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|
169 |
NULL |
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|
170 |
}; |
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|
171 |
int level_constants[] = { |
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172 |
LOG_DEBUG, |
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|
173 |
LOG_INFO, |
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|
174 |
LOG_NOTICE, |
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|
175 |
LOG_WARNING, |
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|
176 |
LOG_EMERG, |
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|
177 |
-1 |
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|
178 |
}; |
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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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|
179 |
int lc_syslog_log(lua_State* L) |
722
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180 |
{ |
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63f56696c66c
util.pposix: Fix incompatible pointer type compiler warnings
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|
181 |
int level = luaL_checkoption(L, 1, "notice", level_strings); |
722
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|
182 |
level = level_constants[level]; |
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|
183 |
|
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|
184 |
luaL_checkstring(L, 2); |
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|
185 |
|
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|
186 |
syslog(level, "%s", lua_tostring(L, 2)); |
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|
187 |
return 0; |
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|
188 |
} |
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|
189 |
|
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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|
190 |
int lc_syslog_close(lua_State* L) |
722
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191 |
{ |
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|
192 |
closelog(); |
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|
193 |
if(syslog_ident) |
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194 |
{ |
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195 |
free(syslog_ident); |
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196 |
syslog_ident = NULL; |
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197 |
} |
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|
198 |
return 0; |
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|
199 |
} |
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|
200 |
|
729
f62ef65d5c01
pposix: Add syslog_setmask (use config: minimum_log_level = 'warn' etc.)
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|
201 |
int lc_syslog_setmask(lua_State* L) |
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|
202 |
{ |
796
63f56696c66c
util.pposix: Fix incompatible pointer type compiler warnings
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parents:
766
diff
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|
203 |
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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|
204 |
int mask = 0; |
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|
205 |
do |
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|
206 |
{ |
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|
207 |
mask |= LOG_MASK(level_constants[level_idx]); |
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|
208 |
} while (++level_idx<=4); |
f62ef65d5c01
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diff
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|
209 |
|
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|
210 |
setlogmask(mask); |
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|
211 |
return 0; |
f62ef65d5c01
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|
212 |
} |
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diff
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|
213 |
|
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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|
214 |
/* getpid */ |
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|
215 |
|
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diff
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|
216 |
int lc_getpid(lua_State* L) |
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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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217 |
{ |
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|
218 |
lua_pushinteger(L, getpid()); |
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|
219 |
return 1; |
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|
220 |
} |
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|
221 |
|
804
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
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diff
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|
222 |
/* UID/GID functions */ |
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223 |
|
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224 |
int lc_getuid(lua_State* L) |
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225 |
{ |
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226 |
lua_pushinteger(L, getuid()); |
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227 |
return 1; |
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228 |
} |
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229 |
|
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230 |
int lc_getgid(lua_State* L) |
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231 |
{ |
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232 |
lua_pushinteger(L, getgid()); |
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233 |
return 1; |
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234 |
} |
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|
235 |
|
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236 |
int lc_setuid(lua_State* L) |
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237 |
{ |
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|
238 |
int uid = -1; |
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|
239 |
if(lua_gettop(L) < 1) |
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240 |
return 0; |
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|
241 |
if(!lua_isnumber(L, 1) && lua_tostring(L, 1)) |
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242 |
{ |
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|
243 |
/* Passed UID is actually a string, so look up the UID */ |
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244 |
struct passwd *p; |
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245 |
p = getpwnam(lua_tostring(L, 1)); |
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246 |
if(!p) |
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247 |
{ |
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248 |
lua_pushboolean(L, 0); |
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249 |
lua_pushstring(L, "no-such-user"); |
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250 |
return 2; |
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251 |
} |
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252 |
uid = p->pw_uid; |
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253 |
} |
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|
254 |
else |
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255 |
{ |
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256 |
uid = lua_tonumber(L, 1); |
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257 |
} |
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|
258 |
|
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259 |
if(uid>-1) |
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260 |
{ |
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|
261 |
/* Ok, attempt setuid */ |
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262 |
errno = 0; |
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|
263 |
if(setuid(uid)) |
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264 |
{ |
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|
265 |
/* Fail */ |
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266 |
lua_pushboolean(L, 0); |
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|
267 |
switch(errno) |
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268 |
{ |
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|
269 |
case EINVAL: |
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270 |
lua_pushstring(L, "invalid-uid"); |
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271 |
break; |
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272 |
case EPERM: |
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273 |
lua_pushstring(L, "permission-denied"); |
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274 |
break; |
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275 |
default: |
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276 |
lua_pushstring(L, "unknown-error"); |
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277 |
} |
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|
278 |
return 2; |
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279 |
} |
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|
280 |
else |
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|
281 |
{ |
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|
282 |
/* Success! */ |
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|
283 |
lua_pushboolean(L, 1); |
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|
284 |
return 1; |
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|
285 |
} |
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|
286 |
} |
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changeset
|
287 |
|
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|
288 |
/* Seems we couldn't find a valid UID to switch to */ |
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|
289 |
lua_pushboolean(L, 0); |
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|
290 |
lua_pushstring(L, "invalid-uid"); |
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|
291 |
return 2; |
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|
292 |
} |
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|
293 |
|
859 | 294 |
/* Like POSIX's setrlimit()/getrlimit() API functions. |
295 |
* |
|
296 |
* Syntax: |
|
297 |
* pposix.setrlimit( resource, soft limit, hard limit) |
|
298 |
* |
|
299 |
* Any negative limit will be replace with the current limit by an additional call of getrlimit(). |
|
300 |
* |
|
301 |
* Example usage: |
|
302 |
* pposix.setrlimit("NOFILE", 1000, 2000) |
|
303 |
*/ |
|
304 |
int string2resource(const char *s) { |
|
305 |
if (!strcmp(resource, "CORE")) return RLIMIT_CORE; |
|
306 |
if (!strcmp(resource, "CPU")) return RLIMIT_CPU; |
|
307 |
if (!strcmp(resource, "DATA")) return RLIMIT_DATA; |
|
308 |
if (!strcmp(resource, "FSIZE")) return RLIMIT_FSIZE; |
|
309 |
if (!strcmp(resource, "MEMLOCK")) return RLIMIT_MEMLOCK; |
|
310 |
if (!strcmp(resource, "NOFILE")) return RLIMIT_NOFILE; |
|
311 |
if (!strcmp(resource, "NPROC")) return RLIMIT_NPROC; |
|
312 |
if (!strcmp(resource, "RSS")) return RLIMIT_RSS; |
|
313 |
if (!strcmp(resource, "STACK")) return RLIMIT_STACK; |
|
314 |
return -1; |
|
315 |
} |
|
316 |
||
317 |
int lc_setrlimit(lua_State *L) { |
|
318 |
int arguments = lua_gettop(L); |
|
319 |
int softlimit = -1; |
|
320 |
int hardlimit = -1; |
|
321 |
const char *resource = NULL; |
|
322 |
int rid = -1; |
|
323 |
if(arguments < 1 || arguments > 3) { |
|
324 |
lua_pushboolean(L, 0); |
|
325 |
lua_pushstring(L, "Wrong number of arguments"); |
|
326 |
} |
|
327 |
||
328 |
resource = luaL_checkstring(L, 1); |
|
329 |
softlimit = luaL_checkinteger(L, 2); |
|
330 |
hardlimit = luaL_checkinteger(L, 3); |
|
331 |
||
332 |
rid = string2resource(resource); |
|
333 |
if (rid != -1) { |
|
334 |
rlimit lim; |
|
335 |
rlimit lim_current; |
|
336 |
||
337 |
if (softlimit < 0 || hardlimit < 0) { |
|
338 |
if (getrlimit(rid, &lim_current)) { |
|
339 |
lua_pushboolean(L, 0); |
|
340 |
lua_pushstring(L, "getrlimit() failed."); |
|
341 |
return 2; |
|
342 |
} |
|
343 |
} |
|
344 |
||
345 |
if (softimit < 0) lim.rlim_cur = lim_current.rlim_cur; |
|
346 |
else lim.rlim_cur = softlimit; |
|
347 |
if (hardlimit < 0) lim.rlim_max = lim_current.rlim_max; |
|
348 |
else lim.rlim_max = hardlimit; |
|
349 |
||
350 |
if (setrlimit(rid, &lim)) { |
|
351 |
lua_pushboolean(L, 0); |
|
352 |
lua_pushstring(L, "setrlimit() failed."); |
|
353 |
return 2; |
|
354 |
} |
|
355 |
} else { |
|
356 |
lua_pushboolean(L, 0); |
|
357 |
lua_pushstring(L, "Unsupported resoucrce. Sorry I'm pretty limited by POSIX standard."); |
|
358 |
return 2; |
|
359 |
} |
|
360 |
lua_pushboolean(L, 1); |
|
361 |
return 1; |
|
362 |
} |
|
363 |
||
364 |
int lc_getrlimit(lua_State *L) { |
|
365 |
return 0; |
|
366 |
} |
|
367 |
||
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
|
368 |
/* 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
|
369 |
|
586
b828d7d47973
Add posix support library, and adjust makefiles for it
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
|
370 |
int luaopen_util_pposix(lua_State *L) |
b828d7d47973
Add posix support library, and adjust makefiles for it
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
|
371 |
{ |
b828d7d47973
Add posix support library, and adjust makefiles for it
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
|
372 |
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
|
373 |
|
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
|
374 |
lua_pushcfunction(L, lc_daemonize); |
586
b828d7d47973
Add posix support library, and adjust makefiles for it
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
|
375 |
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
|
376 |
|
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
|
377 |
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
|
378 |
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
|
379 |
|
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
|
380 |
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
|
381 |
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
|
382 |
|
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
|
383 |
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
|
384 |
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
|
385 |
|
729
f62ef65d5c01
pposix: Add syslog_setmask (use config: minimum_log_level = 'warn' etc.)
Matthew Wild <mwild1@gmail.com>
parents:
727
diff
changeset
|
386 |
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
|
387 |
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
|
388 |
|
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
|
389 |
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
|
390 |
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
|
391 |
|
804
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
Matthew Wild <mwild1@gmail.com>
parents:
796
diff
changeset
|
392 |
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
|
393 |
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
|
394 |
|
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
Matthew Wild <mwild1@gmail.com>
parents:
796
diff
changeset
|
395 |
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
|
396 |
lua_setfield(L, -2, "setuid"); |
859 | 397 |
|
398 |
lua_pushcfunction(L, lc_setrlimit); |
|
399 |
lua_setfield(L, -2, "setrlimit"); |
|
400 |
||
401 |
lua_pushcfunction(L, lc_getrlimit); |
|
402 |
lua_setfield(L, -2, "getrlimit"); |
|
804
9bc1544c99b7
util.pposix: Add getuid/setuid (we don't use them yet)
Matthew Wild <mwild1@gmail.com>
parents:
796
diff
changeset
|
403 |
|
727
78c9542de94e
pposix: Add _NAME and _VERSION
Matthew Wild <mwild1@gmail.com>
parents:
723
diff
changeset
|
404 |
lua_pushliteral(L, "pposix"); |
78c9542de94e
pposix: Add _NAME and _VERSION
Matthew Wild <mwild1@gmail.com>
parents:
723
diff
changeset
|
405 |
lua_setfield(L, -2, "_NAME"); |
78c9542de94e
pposix: Add _NAME and _VERSION
Matthew Wild <mwild1@gmail.com>
parents:
723
diff
changeset
|
406 |
|
78c9542de94e
pposix: Add _NAME and _VERSION
Matthew Wild <mwild1@gmail.com>
parents:
723
diff
changeset
|
407 |
lua_pushliteral(L, MODULE_VERSION); |
78c9542de94e
pposix: Add _NAME and _VERSION
Matthew Wild <mwild1@gmail.com>
parents:
723
diff
changeset
|
408 |
lua_setfield(L, -2, "_VERSION"); |
78c9542de94e
pposix: Add _NAME and _VERSION
Matthew Wild <mwild1@gmail.com>
parents:
723
diff
changeset
|
409 |
|
586
b828d7d47973
Add posix support library, and adjust makefiles for it
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
|
410 |
return 1; |
b828d7d47973
Add posix support library, and adjust makefiles for it
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
|
411 |
}; |