+/*
+** $Id: loslib.c,v 1.40 2012/10/19 15:54:02 roberto Exp $
+** Standard Operating System library
+** See Copyright Notice in lua.h
+*/
+
+
+#include <errno.h>
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#define loslib_c
+#define LUA_LIB
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+/*
+** list of valid conversion specifiers for the 'strftime' function
+*/
+#if !defined(LUA_STRFTIMEOPTIONS)
+
+#if !defined(LUA_USE_POSIX)
+#define LUA_STRFTIMEOPTIONS { "aAbBcdHIjmMpSUwWxXyYz%", "" }
+#else
+#define LUA_STRFTIMEOPTIONS \
+ { "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "" \
+ "", "E", "cCxXyY", \
+ "O", "deHImMSuUVwWy" }
+#endif
+
+#endif
+
+
+
+/*
+** By default, Lua uses tmpnam except when POSIX is available, where it
+** uses mkstemp.
+*/
+#if defined(LUA_USE_MKSTEMP)
+#include <unistd.h>
+#define LUA_TMPNAMBUFSIZE 32
+#define lua_tmpnam(b,e) { \
+ strcpy(b, "/tmp/lua_XXXXXX"); \
+ e = mkstemp(b); \
+ if (e != -1) close(e); \
+ e = (e == -1); }
+
+#elif !defined(lua_tmpnam)
+
+#define LUA_TMPNAMBUFSIZE L_tmpnam
+#define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); }
+
+#endif
+
+
+/*
+** By default, Lua uses gmtime/localtime, except when POSIX is available,
+** where it uses gmtime_r/localtime_r
+*/
+#if defined(LUA_USE_GMTIME_R)
+
+#define l_gmtime(t,r) gmtime_r(t,r)
+#define l_localtime(t,r) localtime_r(t,r)
+
+#elif !defined(l_gmtime)
+
+#define l_gmtime(t,r) ((void)r, gmtime(t))
+#define l_localtime(t,r) ((void)r, localtime(t))
+
+#endif
+
+
+
+static int os_execute (lua_State *L) {
+ const char *cmd = luaL_optstring(L, 1, NULL);
+ int stat = system(cmd);
+ if (cmd != NULL)
+ return luaL_execresult(L, stat);
+ else {
+ lua_pushboolean(L, stat); /* true if there is a shell */
+ return 1;
+ }
+}
+
+
+static int os_remove (lua_State *L) {
+ const char *filename = luaL_checkstring(L, 1);
+ return luaL_fileresult(L, remove(filename) == 0, filename);
+}
+
+
+static int os_rename (lua_State *L) {
+ const char *fromname = luaL_checkstring(L, 1);
+ const char *toname = luaL_checkstring(L, 2);
+ return luaL_fileresult(L, rename(fromname, toname) == 0, NULL);
+}
+
+
+static int os_tmpname (lua_State *L) {
+ char buff[LUA_TMPNAMBUFSIZE];
+ int err;
+ lua_tmpnam(buff, err);
+ if (err)
+ return luaL_error(L, "unable to generate a unique filename");
+ lua_pushstring(L, buff);
+ return 1;
+}
+
+
+static int os_getenv (lua_State *L) {
+ lua_pushstring(L, getenv(luaL_checkstring(L, 1))); /* if NULL push nil */
+ return 1;
+}
+
+
+static int os_clock (lua_State *L) {
+ lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);
+ return 1;
+}
+
+
+/*
+** {======================================================
+** Time/Date operations
+** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,
+** wday=%w+1, yday=%j, isdst=? }
+** =======================================================
+*/
+
+static void setfield (lua_State *L, const char *key, int value) {
+ lua_pushinteger(L, value);
+ lua_setfield(L, -2, key);
+}
+
+static void setboolfield (lua_State *L, const char *key, int value) {
+ if (value < 0) /* undefined? */
+ return; /* does not set field */
+ lua_pushboolean(L, value);
+ lua_setfield(L, -2, key);
+}
+
+static int getboolfield (lua_State *L, const char *key) {
+ int res;
+ lua_getfield(L, -1, key);
+ res = lua_isnil(L, -1) ? -1 : lua_toboolean(L, -1);
+ lua_pop(L, 1);
+ return res;
+}
+
+
+static int getfield (lua_State *L, const char *key, int d) {
+ int res, isnum;
+ lua_getfield(L, -1, key);
+ res = (int)lua_tointegerx(L, -1, &isnum);
+ if (!isnum) {
+ if (d < 0)
+ return luaL_error(L, "field " LUA_QS " missing in date table", key);
+ res = d;
+ }
+ lua_pop(L, 1);
+ return res;
+}
+
+
+static const char *checkoption (lua_State *L, const char *conv, char *buff) {
+ static const char *const options[] = LUA_STRFTIMEOPTIONS;
+ unsigned int i;
+ for (i = 0; i < sizeof(options)/sizeof(options[0]); i += 2) {
+ if (*conv != '\0' && strchr(options[i], *conv) != NULL) {
+ buff[1] = *conv;
+ if (*options[i + 1] == '\0') { /* one-char conversion specifier? */
+ buff[2] = '\0'; /* end buffer */
+ return conv + 1;
+ }
+ else if (*(conv + 1) != '\0' &&
+ strchr(options[i + 1], *(conv + 1)) != NULL) {
+ buff[2] = *(conv + 1); /* valid two-char conversion specifier */
+ buff[3] = '\0'; /* end buffer */
+ return conv + 2;
+ }
+ }
+ }
+ luaL_argerror(L, 1,
+ lua_pushfstring(L, "invalid conversion specifier '%%%s'", conv));
+ return conv; /* to avoid warnings */
+}
+
+
+static int os_date (lua_State *L) {
+ const char *s = luaL_optstring(L, 1, "%c");
+ time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));
+ struct tm tmr, *stm;
+ if (*s == '!') { /* UTC? */
+ stm = l_gmtime(&t, &tmr);
+ s++; /* skip `!' */
+ }
+ else
+ stm = l_localtime(&t, &tmr);
+ if (stm == NULL) /* invalid date? */
+ lua_pushnil(L);
+ else if (strcmp(s, "*t") == 0) {
+ lua_createtable(L, 0, 9); /* 9 = number of fields */
+ setfield(L, "sec", stm->tm_sec);
+ setfield(L, "min", stm->tm_min);
+ setfield(L, "hour", stm->tm_hour);
+ setfield(L, "day", stm->tm_mday);
+ setfield(L, "month", stm->tm_mon+1);
+ setfield(L, "year", stm->tm_year+1900);
+ setfield(L, "wday", stm->tm_wday+1);
+ setfield(L, "yday", stm->tm_yday+1);
+ setboolfield(L, "isdst", stm->tm_isdst);
+ }
+ else {
+ char cc[4];
+ luaL_Buffer b;
+ cc[0] = '%';
+ luaL_buffinit(L, &b);
+ while (*s) {
+ if (*s != '%') /* no conversion specifier? */
+ luaL_addchar(&b, *s++);
+ else {
+ size_t reslen;
+ char buff[200]; /* should be big enough for any conversion result */
+ s = checkoption(L, s + 1, cc);
+ reslen = strftime(buff, sizeof(buff), cc, stm);
+ luaL_addlstring(&b, buff, reslen);
+ }
+ }
+ luaL_pushresult(&b);
+ }
+ return 1;
+}
+
+
+static int os_time (lua_State *L) {
+ time_t t;
+ if (lua_isnoneornil(L, 1)) /* called without args? */
+ t = time(NULL); /* get current time */
+ else {
+ struct tm ts;
+ luaL_checktype(L, 1, LUA_TTABLE);
+ lua_settop(L, 1); /* make sure table is at the top */
+ ts.tm_sec = getfield(L, "sec", 0);
+ ts.tm_min = getfield(L, "min", 0);
+ ts.tm_hour = getfield(L, "hour", 12);
+ ts.tm_mday = getfield(L, "day", -1);
+ ts.tm_mon = getfield(L, "month", -1) - 1;
+ ts.tm_year = getfield(L, "year", -1) - 1900;
+ ts.tm_isdst = getboolfield(L, "isdst");
+ t = mktime(&ts);
+ }
+ if (t == (time_t)(-1))
+ lua_pushnil(L);
+ else
+ lua_pushnumber(L, (lua_Number)t);
+ return 1;
+}
+
+
+static int os_difftime (lua_State *L) {
+ lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
+ (time_t)(luaL_optnumber(L, 2, 0))));
+ return 1;
+}
+
+/* }====================================================== */
+
+
+static int os_setlocale (lua_State *L) {
+ static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,
+ LC_NUMERIC, LC_TIME};
+ static const char *const catnames[] = {"all", "collate", "ctype", "monetary",
+ "numeric", "time", NULL};
+ const char *l = luaL_optstring(L, 1, NULL);
+ int op = luaL_checkoption(L, 2, "all", catnames);
+ lua_pushstring(L, setlocale(cat[op], l));
+ return 1;
+}
+
+
+static int os_exit (lua_State *L) {
+ int status;
+ if (lua_isboolean(L, 1))
+ status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE);
+ else
+ status = luaL_optint(L, 1, EXIT_SUCCESS);
+ if (lua_toboolean(L, 2))
+ lua_close(L);
+ if (L) exit(status); /* 'if' to avoid warnings for unreachable 'return' */
+ return 0;
+}
+
+
+static const luaL_Reg syslib[] = {
+ {"clock", os_clock},
+ {"date", os_date},
+ {"difftime", os_difftime},
+ {"execute", os_execute},
+ {"exit", os_exit},
+ {"getenv", os_getenv},
+ {"remove", os_remove},
+ {"rename", os_rename},
+ {"setlocale", os_setlocale},
+ {"time", os_time},
+ {"tmpname", os_tmpname},
+ {NULL, NULL}
+};
+
+/* }====================================================== */
+
+
+
+LUAMOD_API int luaopen_os (lua_State *L) {
+ luaL_newlib(L, syslib);
+ return 1;
+}
+
projects / proxmark3-svn / blobdiff