-/* Prosody IM v0.4
--- Copyright (C) 2008-2009 Matthew Wild
--- Copyright (C) 2008-2009 Waqas Hussain
+/* Prosody IM
+-- Copyright (C) 2008-2010 Matthew Wild
+-- Copyright (C) 2008-2010 Waqas Hussain
-- Copyright (C) 2009 Tobias Markmann
--
-- This project is MIT/X11 licensed. Please see the
* POSIX support functions for Lua
*/
-#define MODULE_VERSION "0.3.1"
+#define MODULE_VERSION "0.3.5"
#include <stdlib.h>
+#include <math.h>
#include <unistd.h>
#include <libgen.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/utsname.h>
#include <fcntl.h>
#include <syslog.h>
#include <string.h>
#include <errno.h>
#include "lua.h"
+#include "lualib.h"
#include "lauxlib.h"
+#include <fcntl.h>
+#if defined(_GNU_SOURCE)
+#include <linux/falloc.h>
+#endif
+
+#if (defined(_SVID_SOURCE) && !defined(WITHOUT_MALLINFO))
+ #include <malloc.h>
+ #define WITH_MALLINFO
+#endif
+
/* Daemonization support */
static int lc_daemonize(lua_State *L)
close(0);
close(1);
close(2);
+ /* Make sure accidental use of FDs 0, 1, 2 don't cause weirdness */
+ open("/dev/null", O_RDONLY);
+ open("/dev/null", O_WRONLY);
+ open("/dev/null", O_WRONLY);
/* Final fork, use it wisely */
if(fork())
};
int lc_syslog_log(lua_State* L)
{
- int level = luaL_checkoption(L, 1, "notice", level_strings);
- level = level_constants[level];
+ int level = level_constants[luaL_checkoption(L, 1, "notice", level_strings)];
- luaL_checkstring(L, 2);
+ if(lua_gettop(L) == 3)
+ syslog(level, "%s: %s", luaL_checkstring(L, 2), luaL_checkstring(L, 3));
+ else
+ syslog(level, "%s", lua_tostring(L, 2));
- syslog(level, "%s", lua_tostring(L, 2));
return 0;
}
return 2;
}
+int lc_initgroups(lua_State* L)
+{
+ int ret;
+ gid_t gid;
+ struct passwd *p;
+
+ if(!lua_isstring(L, 1))
+ {
+ lua_pushnil(L);
+ lua_pushstring(L, "invalid-username");
+ return 2;
+ }
+ p = getpwnam(lua_tostring(L, 1));
+ if(!p)
+ {
+ lua_pushnil(L);
+ lua_pushstring(L, "no-such-user");
+ return 2;
+ }
+ if(lua_gettop(L) < 2)
+ lua_pushnil(L);
+ switch(lua_type(L, 2))
+ {
+ case LUA_TNIL:
+ gid = p->pw_gid;
+ break;
+ case LUA_TNUMBER:
+ gid = lua_tointeger(L, 2);
+ break;
+ default:
+ lua_pushnil(L);
+ lua_pushstring(L, "invalid-gid");
+ return 2;
+ }
+ ret = initgroups(lua_tostring(L, 1), gid);
+ if(ret)
+ {
+ switch(errno)
+ {
+ case ENOMEM:
+ lua_pushnil(L);
+ lua_pushstring(L, "no-memory");
+ break;
+ case EPERM:
+ lua_pushnil(L);
+ lua_pushstring(L, "permission-denied");
+ break;
+ default:
+ lua_pushnil(L);
+ lua_pushstring(L, "unknown-error");
+ }
+ }
+ else
+ {
+ lua_pushboolean(L, 1);
+ lua_pushnil(L);
+ }
+ return 2;
+}
+
+int lc_umask(lua_State* L)
+{
+ char old_mode_string[7];
+ mode_t old_mode = umask(strtoul(luaL_checkstring(L, 1), NULL, 8));
+
+ snprintf(old_mode_string, sizeof(old_mode_string), "%03o", old_mode);
+ old_mode_string[sizeof(old_mode_string)-1] = 0;
+ lua_pushstring(L, old_mode_string);
+
+ return 1;
+}
+
+int lc_mkdir(lua_State* L)
+{
+ int ret = mkdir(luaL_checkstring(L, 1), S_IRUSR | S_IWUSR | S_IXUSR
+ | S_IRGRP | S_IWGRP | S_IXGRP
+ | S_IROTH | S_IXOTH); /* mode 775 */
+
+ lua_pushboolean(L, ret==0);
+ if(ret)
+ {
+ lua_pushstring(L, strerror(errno));
+ return 2;
+ }
+ return 1;
+}
+
/* Like POSIX's setrlimit()/getrlimit() API functions.
*
* Syntax:
if (!strcmp(s, "MEMLOCK")) return RLIMIT_MEMLOCK;
if (!strcmp(s, "NPROC")) return RLIMIT_NPROC;
if (!strcmp(s, "RSS")) return RLIMIT_RSS;
+#endif
+#ifdef RLIMIT_NICE
+ if (!strcmp(s, "NICE")) return RLIMIT_NICE;
#endif
return -1;
}
return 3;
}
-void lc_abort(lua_State* L)
+int lc_abort(lua_State* L)
{
abort();
+ return 0;
}
+int lc_uname(lua_State* L)
+{
+ struct utsname uname_info;
+ if(uname(&uname_info) != 0)
+ {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ return 2;
+ }
+ lua_newtable(L);
+ lua_pushstring(L, uname_info.sysname);
+ lua_setfield(L, -2, "sysname");
+ lua_pushstring(L, uname_info.nodename);
+ lua_setfield(L, -2, "nodename");
+ lua_pushstring(L, uname_info.release);
+ lua_setfield(L, -2, "release");
+ lua_pushstring(L, uname_info.version);
+ lua_setfield(L, -2, "version");
+ lua_pushstring(L, uname_info.machine);
+ lua_setfield(L, -2, "machine");
+ return 1;
+}
+
+int lc_setenv(lua_State* L)
+{
+ const char *var = luaL_checkstring(L, 1);
+ const char *value;
+
+ /* If the second argument is nil or nothing, unset the var */
+ if(lua_isnoneornil(L, 2))
+ {
+ if(unsetenv(var) != 0)
+ {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ return 2;
+ }
+ lua_pushboolean(L, 1);
+ return 1;
+ }
+
+ value = luaL_checkstring(L, 2);
+
+ if(setenv(var, value, 1) != 0)
+ {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ return 2;
+ }
+
+ lua_pushboolean(L, 1);
+ return 1;
+}
+
+#ifdef WITH_MALLINFO
+int lc_meminfo(lua_State* L)
+{
+ struct mallinfo info = mallinfo();
+ lua_newtable(L);
+ /* This is the total size of memory allocated with sbrk by malloc, in bytes. */
+ lua_pushinteger(L, info.arena);
+ lua_setfield(L, -2, "allocated");
+ /* This is the total size of memory allocated with mmap, in bytes. */
+ lua_pushinteger(L, info.hblkhd);
+ lua_setfield(L, -2, "allocated_mmap");
+ /* This is the total size of memory occupied by chunks handed out by malloc. */
+ lua_pushinteger(L, info.uordblks);
+ lua_setfield(L, -2, "used");
+ /* This is the total size of memory occupied by free (not in use) chunks. */
+ lua_pushinteger(L, info.fordblks);
+ lua_setfield(L, -2, "unused");
+ /* This is the size of the top-most releasable chunk that normally borders the
+ end of the heap (i.e., the high end of the virtual address space's data segment). */
+ lua_pushinteger(L, info.keepcost);
+ lua_setfield(L, -2, "returnable");
+ return 1;
+}
+#endif
+
+/* File handle extraction blatantly stolen from
+ * https://github.com/rrthomas/luaposix/blob/master/lposix.c#L631
+ * */
+
+#if _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L || defined(_GNU_SOURCE)
+int lc_fallocate(lua_State* L)
+{
+ off_t offset, len;
+ FILE *f = *(FILE**) luaL_checkudata(L, 1, LUA_FILEHANDLE);
+
+ offset = luaL_checkinteger(L, 2);
+ len = luaL_checkinteger(L, 3);
+
+#if defined(_GNU_SOURCE)
+ if(fallocate(fileno(f), FALLOC_FL_KEEP_SIZE, offset, len) == 0)
+ {
+ lua_pushboolean(L, 1);
+ return 1;
+ }
+
+ if(errno != ENOSYS && errno != EOPNOTSUPP)
+ {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ return 2;
+ }
+#else
+#warning Only using posix_fallocate() fallback.
+#warning Linux fallocate() is strongly recommended if available: recompile with -D_GNU_SOURCE
+#warning Note that posix_fallocate() will still be used on filesystems that dont support fallocate()
+#endif
+
+ if(posix_fallocate(fileno(f), offset, len) == 0)
+ {
+ lua_pushboolean(L, 1);
+ return 1;
+ }
+ else
+ {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ /* posix_fallocate() can leave a bunch of NULs at the end, so we cut that
+ * this assumes that offset == length of the file */
+ ftruncate(fileno(f), offset);
+ return 2;
+ }
+}
+#endif
+
/* Register functions */
int luaopen_util_pposix(lua_State *L)
{
- lua_newtable(L);
+ luaL_Reg exports[] = {
+ { "abort", lc_abort },
+
+ { "daemonize", lc_daemonize },
+
+ { "syslog_open", lc_syslog_open },
+ { "syslog_close", lc_syslog_close },
+ { "syslog_log", lc_syslog_log },
+ { "syslog_setminlevel", lc_syslog_setmask },
- lua_pushcfunction(L, lc_abort);
- lua_setfield(L, -2, "abort");
+ { "getpid", lc_getpid },
+ { "getuid", lc_getuid },
+ { "getgid", lc_getgid },
- lua_pushcfunction(L, lc_daemonize);
- lua_setfield(L, -2, "daemonize");
+ { "setuid", lc_setuid },
+ { "setgid", lc_setgid },
+ { "initgroups", lc_initgroups },
- lua_pushcfunction(L, lc_syslog_open);
- lua_setfield(L, -2, "syslog_open");
+ { "umask", lc_umask },
- lua_pushcfunction(L, lc_syslog_close);
- lua_setfield(L, -2, "syslog_close");
+ { "mkdir", lc_mkdir },
- lua_pushcfunction(L, lc_syslog_log);
- lua_setfield(L, -2, "syslog_log");
+ { "setrlimit", lc_setrlimit },
+ { "getrlimit", lc_getrlimit },
- lua_pushcfunction(L, lc_syslog_setmask);
- lua_setfield(L, -2, "syslog_setminlevel");
+ { "uname", lc_uname },
- lua_pushcfunction(L, lc_getpid);
- lua_setfield(L, -2, "getpid");
+ { "setenv", lc_setenv },
- lua_pushcfunction(L, lc_getuid);
- lua_setfield(L, -2, "getuid");
- lua_pushcfunction(L, lc_getgid);
- lua_setfield(L, -2, "getgid");
+#ifdef WITH_MALLINFO
+ { "meminfo", lc_meminfo },
+#endif
- lua_pushcfunction(L, lc_setuid);
- lua_setfield(L, -2, "setuid");
- lua_pushcfunction(L, lc_setgid);
- lua_setfield(L, -2, "setgid");
+#if _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L || defined(_GNU_SOURCE)
+ { "fallocate", lc_fallocate },
+#endif
- lua_pushcfunction(L, lc_setrlimit);
- lua_setfield(L, -2, "setrlimit");
+ { NULL, NULL }
+ };
- lua_pushcfunction(L, lc_getrlimit);
- lua_setfield(L, -2, "getrlimit");
+ luaL_register(L, "pposix", exports);
lua_pushliteral(L, "pposix");
lua_setfield(L, -2, "_NAME");
lua_setfield(L, -2, "_VERSION");
return 1;
-};
+}