rlm@1: /*
rlm@1: ** $Id: loslib.c,v 1.19.1.3 2008/01/18 16:38:18 roberto Exp $
rlm@1: ** Standard Operating System library
rlm@1: ** See Copyright Notice in lua.h
rlm@1: */
rlm@1: 
rlm@1: 
rlm@1: #include <errno.h>
rlm@1: #include <locale.h>
rlm@1: #include <stdlib.h>
rlm@1: #include <string.h>
rlm@1: #include <time.h>
rlm@1: 
rlm@1: #define loslib_c
rlm@1: #define LUA_LIB
rlm@1: 
rlm@1: #include "lua.h"
rlm@1: 
rlm@1: #include "lauxlib.h"
rlm@1: #include "lualib.h"
rlm@1: 
rlm@1: 
rlm@1: static int os_pushresult (lua_State *L, int i, const char *filename) {
rlm@1:   int en = errno;  /* calls to Lua API may change this value */
rlm@1:   if (i) {
rlm@1:     lua_pushboolean(L, 1);
rlm@1:     return 1;
rlm@1:   }
rlm@1:   else {
rlm@1:     lua_pushnil(L);
rlm@1:     lua_pushfstring(L, "%s: %s", filename, strerror(en));
rlm@1:     lua_pushinteger(L, en);
rlm@1:     return 3;
rlm@1:   }
rlm@1: }
rlm@1: 
rlm@1: 
rlm@1: static int os_execute (lua_State *L) {
rlm@1:   lua_pushinteger(L, system(luaL_optstring(L, 1, NULL)));
rlm@1:   return 1;
rlm@1: }
rlm@1: 
rlm@1: 
rlm@1: static int os_remove (lua_State *L) {
rlm@1:   const char *filename = luaL_checkstring(L, 1);
rlm@1:   return os_pushresult(L, remove(filename) == 0, filename);
rlm@1: }
rlm@1: 
rlm@1: 
rlm@1: static int os_rename (lua_State *L) {
rlm@1:   const char *fromname = luaL_checkstring(L, 1);
rlm@1:   const char *toname = luaL_checkstring(L, 2);
rlm@1:   return os_pushresult(L, rename(fromname, toname) == 0, fromname);
rlm@1: }
rlm@1: 
rlm@1: 
rlm@1: static int os_tmpname (lua_State *L) {
rlm@1:   char buff[LUA_TMPNAMBUFSIZE];
rlm@1:   int err;
rlm@1:   lua_tmpnam(buff, err);
rlm@1:   if (err)
rlm@1:     return luaL_error(L, "unable to generate a unique filename");
rlm@1:   lua_pushstring(L, buff);
rlm@1:   return 1;
rlm@1: }
rlm@1: 
rlm@1: 
rlm@1: static int os_getenv (lua_State *L) {
rlm@1:   lua_pushstring(L, getenv(luaL_checkstring(L, 1)));  /* if NULL push nil */
rlm@1:   return 1;
rlm@1: }
rlm@1: 
rlm@1: 
rlm@1: static int os_clock (lua_State *L) {
rlm@1:   lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);
rlm@1:   return 1;
rlm@1: }
rlm@1: 
rlm@1: 
rlm@1: /*
rlm@1: ** {======================================================
rlm@1: ** Time/Date operations
rlm@1: ** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,
rlm@1: **   wday=%w+1, yday=%j, isdst=? }
rlm@1: ** =======================================================
rlm@1: */
rlm@1: 
rlm@1: static void setfield (lua_State *L, const char *key, int value) {
rlm@1:   lua_pushinteger(L, value);
rlm@1:   lua_setfield(L, -2, key);
rlm@1: }
rlm@1: 
rlm@1: static void setboolfield (lua_State *L, const char *key, int value) {
rlm@1:   if (value < 0)  /* undefined? */
rlm@1:     return;  /* does not set field */
rlm@1:   lua_pushboolean(L, value);
rlm@1:   lua_setfield(L, -2, key);
rlm@1: }
rlm@1: 
rlm@1: static int getboolfield (lua_State *L, const char *key) {
rlm@1:   int res;
rlm@1:   lua_getfield(L, -1, key);
rlm@1:   res = lua_isnil(L, -1) ? -1 : lua_toboolean(L, -1);
rlm@1:   lua_pop(L, 1);
rlm@1:   return res;
rlm@1: }
rlm@1: 
rlm@1: 
rlm@1: static int getfield (lua_State *L, const char *key, int d) {
rlm@1:   int res;
rlm@1:   lua_getfield(L, -1, key);
rlm@1:   if (lua_isnumber(L, -1))
rlm@1:     res = (int)lua_tointeger(L, -1);
rlm@1:   else {
rlm@1:     if (d < 0)
rlm@1:       return luaL_error(L, "field " LUA_QS " missing in date table", key);
rlm@1:     res = d;
rlm@1:   }
rlm@1:   lua_pop(L, 1);
rlm@1:   return res;
rlm@1: }
rlm@1: 
rlm@1: 
rlm@1: static int os_date (lua_State *L) {
rlm@1:   const char *s = luaL_optstring(L, 1, "%c");
rlm@1:   time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));
rlm@1:   struct tm *stm;
rlm@1:   if (*s == '!') {  /* UTC? */
rlm@1:     stm = gmtime(&t);
rlm@1:     s++;  /* skip `!' */
rlm@1:   }
rlm@1:   else
rlm@1:     stm = localtime(&t);
rlm@1:   if (stm == NULL)  /* invalid date? */
rlm@1:     lua_pushnil(L);
rlm@1:   else if (strcmp(s, "*t") == 0) {
rlm@1:     lua_createtable(L, 0, 9);  /* 9 = number of fields */
rlm@1:     setfield(L, "sec", stm->tm_sec);
rlm@1:     setfield(L, "min", stm->tm_min);
rlm@1:     setfield(L, "hour", stm->tm_hour);
rlm@1:     setfield(L, "day", stm->tm_mday);
rlm@1:     setfield(L, "month", stm->tm_mon+1);
rlm@1:     setfield(L, "year", stm->tm_year+1900);
rlm@1:     setfield(L, "wday", stm->tm_wday+1);
rlm@1:     setfield(L, "yday", stm->tm_yday+1);
rlm@1:     setboolfield(L, "isdst", stm->tm_isdst);
rlm@1:   }
rlm@1:   else {
rlm@1:     char cc[3];
rlm@1:     luaL_Buffer b;
rlm@1:     cc[0] = '%'; cc[2] = '\0';
rlm@1:     luaL_buffinit(L, &b);
rlm@1:     for (; *s; s++) {
rlm@1:       if (*s != '%' || *(s + 1) == '\0')  /* no conversion specifier? */
rlm@1:         luaL_addchar(&b, *s);
rlm@1:       else {
rlm@1:         size_t reslen;
rlm@1:         char buff[200];  /* should be big enough for any conversion result */
rlm@1:         cc[1] = *(++s);
rlm@1:         reslen = strftime(buff, sizeof(buff), cc, stm);
rlm@1:         luaL_addlstring(&b, buff, reslen);
rlm@1:       }
rlm@1:     }
rlm@1:     luaL_pushresult(&b);
rlm@1:   }
rlm@1:   return 1;
rlm@1: }
rlm@1: 
rlm@1: 
rlm@1: static int os_time (lua_State *L) {
rlm@1:   time_t t;
rlm@1:   if (lua_isnoneornil(L, 1))  /* called without args? */
rlm@1:     t = time(NULL);  /* get current time */
rlm@1:   else {
rlm@1:     struct tm ts;
rlm@1:     luaL_checktype(L, 1, LUA_TTABLE);
rlm@1:     lua_settop(L, 1);  /* make sure table is at the top */
rlm@1:     ts.tm_sec = getfield(L, "sec", 0);
rlm@1:     ts.tm_min = getfield(L, "min", 0);
rlm@1:     ts.tm_hour = getfield(L, "hour", 12);
rlm@1:     ts.tm_mday = getfield(L, "day", -1);
rlm@1:     ts.tm_mon = getfield(L, "month", -1) - 1;
rlm@1:     ts.tm_year = getfield(L, "year", -1) - 1900;
rlm@1:     ts.tm_isdst = getboolfield(L, "isdst");
rlm@1:     t = mktime(&ts);
rlm@1:   }
rlm@1:   if (t == (time_t)(-1))
rlm@1:     lua_pushnil(L);
rlm@1:   else
rlm@1:     lua_pushnumber(L, (lua_Number)t);
rlm@1:   return 1;
rlm@1: }
rlm@1: 
rlm@1: 
rlm@1: static int os_difftime (lua_State *L) {
rlm@1:   lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
rlm@1:                              (time_t)(luaL_optnumber(L, 2, 0))));
rlm@1:   return 1;
rlm@1: }
rlm@1: 
rlm@1: /* }====================================================== */
rlm@1: 
rlm@1: 
rlm@1: static int os_setlocale (lua_State *L) {
rlm@1:   static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,
rlm@1:                       LC_NUMERIC, LC_TIME};
rlm@1:   static const char *const catnames[] = {"all", "collate", "ctype", "monetary",
rlm@1:      "numeric", "time", NULL};
rlm@1:   const char *l = luaL_optstring(L, 1, NULL);
rlm@1:   int op = luaL_checkoption(L, 2, "all", catnames);
rlm@1:   lua_pushstring(L, setlocale(cat[op], l));
rlm@1:   return 1;
rlm@1: }
rlm@1: 
rlm@1: 
rlm@1: static int os_exit (lua_State *L) {
rlm@1:   exit(luaL_optint(L, 1, EXIT_SUCCESS));
rlm@1: }
rlm@1: 
rlm@1: static const luaL_Reg syslib[] = {
rlm@1:   {"clock",     os_clock},
rlm@1:   {"date",      os_date},
rlm@1:   {"difftime",  os_difftime},
rlm@1:   {"execute",   os_execute},
rlm@1:   {"exit",      os_exit},
rlm@1:   {"getenv",    os_getenv},
rlm@1:   {"remove",    os_remove},
rlm@1:   {"rename",    os_rename},
rlm@1:   {"setlocale", os_setlocale},
rlm@1:   {"time",      os_time},
rlm@1:   {"tmpname",   os_tmpname},
rlm@1:   {NULL, NULL}
rlm@1: };
rlm@1: 
rlm@1: /* }====================================================== */
rlm@1: 
rlm@1: 
rlm@1: 
rlm@1: LUALIB_API int luaopen_os (lua_State *L) {
rlm@1:   luaL_register(L, LUA_OSLIBNAME, syslib);
rlm@1:   return 1;
rlm@1: }
rlm@1: