--- /dev/null
+/*\r
+** $Id: loslib.c,v 1.40.1.1 2013/04/12 18:48:47 roberto Exp $\r
+** Standard Operating System library\r
+** See Copyright Notice in lua.h\r
+*/\r
+\r
+\r
+#include <errno.h>\r
+#include <locale.h>\r
+#include <stdlib.h>\r
+#include <string.h>\r
+#include <time.h>\r
+\r
+#define loslib_c\r
+#define LUA_LIB\r
+\r
+#include "lua.h"\r
+\r
+#include "lauxlib.h"\r
+#include "lualib.h"\r
+\r
+\r
+/*\r
+** list of valid conversion specifiers for the 'strftime' function\r
+*/\r
+#if !defined(LUA_STRFTIMEOPTIONS)\r
+\r
+#if !defined(LUA_USE_POSIX)\r
+#define LUA_STRFTIMEOPTIONS { "aAbBcdHIjmMpSUwWxXyYz%", "" }\r
+#else\r
+#define LUA_STRFTIMEOPTIONS \\r
+ { "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "" \\r
+ "", "E", "cCxXyY", \\r
+ "O", "deHImMSuUVwWy" }\r
+#endif\r
+\r
+#endif\r
+\r
+\r
+\r
+/*\r
+** By default, Lua uses tmpnam except when POSIX is available, where it\r
+** uses mkstemp.\r
+*/\r
+#if defined(LUA_USE_MKSTEMP)\r
+#include <unistd.h>\r
+#define LUA_TMPNAMBUFSIZE 32\r
+#define lua_tmpnam(b,e) { \\r
+ strcpy(b, "/tmp/lua_XXXXXX"); \\r
+ e = mkstemp(b); \\r
+ if (e != -1) close(e); \\r
+ e = (e == -1); }\r
+\r
+#elif !defined(lua_tmpnam)\r
+\r
+#define LUA_TMPNAMBUFSIZE L_tmpnam\r
+#define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); }\r
+\r
+#endif\r
+\r
+\r
+/*\r
+** By default, Lua uses gmtime/localtime, except when POSIX is available,\r
+** where it uses gmtime_r/localtime_r\r
+*/\r
+#if defined(LUA_USE_GMTIME_R)\r
+\r
+#define l_gmtime(t,r) gmtime_r(t,r)\r
+#define l_localtime(t,r) localtime_r(t,r)\r
+\r
+#elif !defined(l_gmtime)\r
+\r
+#define l_gmtime(t,r) ((void)r, gmtime(t))\r
+#define l_localtime(t,r) ((void)r, localtime(t))\r
+\r
+#endif\r
+\r
+\r
+\r
+static int os_execute (lua_State *L) {\r
+ const char *cmd = luaL_optstring(L, 1, NULL);\r
+ int stat = system(cmd);\r
+ if (cmd != NULL)\r
+ return luaL_execresult(L, stat);\r
+ else {\r
+ lua_pushboolean(L, stat); /* true if there is a shell */\r
+ return 1;\r
+ }\r
+}\r
+\r
+\r
+static int os_remove (lua_State *L) {\r
+ const char *filename = luaL_checkstring(L, 1);\r
+ return luaL_fileresult(L, remove(filename) == 0, filename);\r
+}\r
+\r
+\r
+static int os_rename (lua_State *L) {\r
+ const char *fromname = luaL_checkstring(L, 1);\r
+ const char *toname = luaL_checkstring(L, 2);\r
+ return luaL_fileresult(L, rename(fromname, toname) == 0, NULL);\r
+}\r
+\r
+\r
+static int os_tmpname (lua_State *L) {\r
+ char buff[LUA_TMPNAMBUFSIZE];\r
+ int err;\r
+ lua_tmpnam(buff, err);\r
+ if (err)\r
+ return luaL_error(L, "unable to generate a unique filename");\r
+ lua_pushstring(L, buff);\r
+ return 1;\r
+}\r
+\r
+\r
+static int os_getenv (lua_State *L) {\r
+ lua_pushstring(L, getenv(luaL_checkstring(L, 1))); /* if NULL push nil */\r
+ return 1;\r
+}\r
+\r
+\r
+static int os_clock (lua_State *L) {\r
+ lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);\r
+ return 1;\r
+}\r
+\r
+\r
+/*\r
+** {======================================================\r
+** Time/Date operations\r
+** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,\r
+** wday=%w+1, yday=%j, isdst=? }\r
+** =======================================================\r
+*/\r
+\r
+static void setfield (lua_State *L, const char *key, int value) {\r
+ lua_pushinteger(L, value);\r
+ lua_setfield(L, -2, key);\r
+}\r
+\r
+static void setboolfield (lua_State *L, const char *key, int value) {\r
+ if (value < 0) /* undefined? */\r
+ return; /* does not set field */\r
+ lua_pushboolean(L, value);\r
+ lua_setfield(L, -2, key);\r
+}\r
+\r
+static int getboolfield (lua_State *L, const char *key) {\r
+ int res;\r
+ lua_getfield(L, -1, key);\r
+ res = lua_isnil(L, -1) ? -1 : lua_toboolean(L, -1);\r
+ lua_pop(L, 1);\r
+ return res;\r
+}\r
+\r
+\r
+static int getfield (lua_State *L, const char *key, int d) {\r
+ int res, isnum;\r
+ lua_getfield(L, -1, key);\r
+ res = (int)lua_tointegerx(L, -1, &isnum);\r
+ if (!isnum) {\r
+ if (d < 0)\r
+ return luaL_error(L, "field " LUA_QS " missing in date table", key);\r
+ res = d;\r
+ }\r
+ lua_pop(L, 1);\r
+ return res;\r
+}\r
+\r
+\r
+static const char *checkoption (lua_State *L, const char *conv, char *buff) {\r
+ static const char *const options[] = LUA_STRFTIMEOPTIONS;\r
+ unsigned int i;\r
+ for (i = 0; i < sizeof(options)/sizeof(options[0]); i += 2) {\r
+ if (*conv != '\0' && strchr(options[i], *conv) != NULL) {\r
+ buff[1] = *conv;\r
+ if (*options[i + 1] == '\0') { /* one-char conversion specifier? */\r
+ buff[2] = '\0'; /* end buffer */\r
+ return conv + 1;\r
+ }\r
+ else if (*(conv + 1) != '\0' &&\r
+ strchr(options[i + 1], *(conv + 1)) != NULL) {\r
+ buff[2] = *(conv + 1); /* valid two-char conversion specifier */\r
+ buff[3] = '\0'; /* end buffer */\r
+ return conv + 2;\r
+ }\r
+ }\r
+ }\r
+ luaL_argerror(L, 1,\r
+ lua_pushfstring(L, "invalid conversion specifier '%%%s'", conv));\r
+ return conv; /* to avoid warnings */\r
+}\r
+\r
+\r
+static int os_date (lua_State *L) {\r
+ const char *s = luaL_optstring(L, 1, "%c");\r
+ time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));\r
+ struct tm tmr, *stm;\r
+ if (*s == '!') { /* UTC? */\r
+ stm = l_gmtime(&t, &tmr);\r
+ s++; /* skip `!' */\r
+ }\r
+ else\r
+ stm = l_localtime(&t, &tmr);\r
+ if (stm == NULL) /* invalid date? */\r
+ lua_pushnil(L);\r
+ else if (strcmp(s, "*t") == 0) {\r
+ lua_createtable(L, 0, 9); /* 9 = number of fields */\r
+ setfield(L, "sec", stm->tm_sec);\r
+ setfield(L, "min", stm->tm_min);\r
+ setfield(L, "hour", stm->tm_hour);\r
+ setfield(L, "day", stm->tm_mday);\r
+ setfield(L, "month", stm->tm_mon+1);\r
+ setfield(L, "year", stm->tm_year+1900);\r
+ setfield(L, "wday", stm->tm_wday+1);\r
+ setfield(L, "yday", stm->tm_yday+1);\r
+ setboolfield(L, "isdst", stm->tm_isdst);\r
+ }\r
+ else {\r
+ char cc[4];\r
+ luaL_Buffer b;\r
+ cc[0] = '%';\r
+ luaL_buffinit(L, &b);\r
+ while (*s) {\r
+ if (*s != '%') /* no conversion specifier? */\r
+ luaL_addchar(&b, *s++);\r
+ else {\r
+ size_t reslen;\r
+ char buff[200]; /* should be big enough for any conversion result */\r
+ s = checkoption(L, s + 1, cc);\r
+ reslen = strftime(buff, sizeof(buff), cc, stm);\r
+ luaL_addlstring(&b, buff, reslen);\r
+ }\r
+ }\r
+ luaL_pushresult(&b);\r
+ }\r
+ return 1;\r
+}\r
+\r
+\r
+static int os_time (lua_State *L) {\r
+ time_t t;\r
+ if (lua_isnoneornil(L, 1)) /* called without args? */\r
+ t = time(NULL); /* get current time */\r
+ else {\r
+ struct tm ts;\r
+ luaL_checktype(L, 1, LUA_TTABLE);\r
+ lua_settop(L, 1); /* make sure table is at the top */\r
+ ts.tm_sec = getfield(L, "sec", 0);\r
+ ts.tm_min = getfield(L, "min", 0);\r
+ ts.tm_hour = getfield(L, "hour", 12);\r
+ ts.tm_mday = getfield(L, "day", -1);\r
+ ts.tm_mon = getfield(L, "month", -1) - 1;\r
+ ts.tm_year = getfield(L, "year", -1) - 1900;\r
+ ts.tm_isdst = getboolfield(L, "isdst");\r
+ t = mktime(&ts);\r
+ }\r
+ if (t == (time_t)(-1))\r
+ lua_pushnil(L);\r
+ else\r
+ lua_pushnumber(L, (lua_Number)t);\r
+ return 1;\r
+}\r
+\r
+\r
+static int os_difftime (lua_State *L) {\r
+ lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),\r
+ (time_t)(luaL_optnumber(L, 2, 0))));\r
+ return 1;\r
+}\r
+\r
+/* }====================================================== */\r
+\r
+\r
+static int os_setlocale (lua_State *L) {\r
+ static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,\r
+ LC_NUMERIC, LC_TIME};\r
+ static const char *const catnames[] = {"all", "collate", "ctype", "monetary",\r
+ "numeric", "time", NULL};\r
+ const char *l = luaL_optstring(L, 1, NULL);\r
+ int op = luaL_checkoption(L, 2, "all", catnames);\r
+ lua_pushstring(L, setlocale(cat[op], l));\r
+ return 1;\r
+}\r
+\r
+\r
+static int os_exit (lua_State *L) {\r
+ int status;\r
+ if (lua_isboolean(L, 1))\r
+ status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE);\r
+ else\r
+ status = luaL_optint(L, 1, EXIT_SUCCESS);\r
+ if (lua_toboolean(L, 2))\r
+ lua_close(L);\r
+ if (L) exit(status); /* 'if' to avoid warnings for unreachable 'return' */\r
+ return 0;\r
+}\r
+\r
+\r
+static const luaL_Reg syslib[] = {\r
+ {"clock", os_clock},\r
+ {"date", os_date},\r
+ {"difftime", os_difftime},\r
+ {"execute", os_execute},\r
+ {"exit", os_exit},\r
+ {"getenv", os_getenv},\r
+ {"remove", os_remove},\r
+ {"rename", os_rename},\r
+ {"setlocale", os_setlocale},\r
+ {"time", os_time},\r
+ {"tmpname", os_tmpname},\r
+ {NULL, NULL}\r
+};\r
+\r
+/* }====================================================== */\r
+\r
+\r
+\r
+LUAMOD_API int luaopen_os (lua_State *L) {\r
+ luaL_newlib(L, syslib);\r
+ return 1;\r
+}\r
+\r
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