0,0 → 1,322 |
/* |
** $Id: loslib.c,v 1.38 2011/11/30 12:35:05 roberto Exp $ |
** Standard Operating System library |
** See Copyright Notice in lua.h |
*/ |
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#include <errno.h> |
#include <locale.h> |
#include <stdlib.h> |
#include <string.h> |
#include <time.h> |
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#define loslib_c |
#define LUA_LIB |
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#include "lua.h" |
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#include "lauxlib.h" |
#include "lualib.h" |
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/* |
** list of valid conversion specifiers for the 'strftime' function |
*/ |
#if !defined(LUA_STRFTIMEOPTIONS) |
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#if !defined(LUA_USE_POSIX) |
#define LUA_STRFTIMEOPTIONS { "aAbBcdHIjmMpSUwWxXyYz%", "" } |
#else |
#define LUA_STRFTIMEOPTIONS { "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "", \ |
"E", "cCxXyY", \ |
"O", "deHImMSuUVwWy" } |
#endif |
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#endif |
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/* |
** 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); } |
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#elif !defined(lua_tmpnam) |
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#define LUA_TMPNAMBUFSIZE L_tmpnam |
#define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); } |
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#endif |
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/* |
** By default, Lua uses gmtime/localtime, except when POSIX is available, |
** where it uses gmtime_r/localtime_r |
*/ |
#if defined(LUA_USE_GMTIME_R) |
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#define l_gmtime(t,r) gmtime_r(t,r) |
#define l_localtime(t,r) localtime_r(t,r) |
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#elif !defined(l_gmtime) |
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#define l_gmtime(t,r) ((void)r, gmtime(t)) |
#define l_localtime(t,r) ((void)r, localtime(t)) |
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#endif |
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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; |
} |
} |
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static int os_remove (lua_State *L) { |
const char *filename = luaL_checkstring(L, 1); |
return luaL_fileresult(L, remove(filename) == 0, filename); |
} |
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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, fromname); |
} |
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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; |
} |
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static int os_getenv (lua_State *L) { |
lua_pushstring(L, getenv(luaL_checkstring(L, 1))); /* if NULL push nil */ |
return 1; |
} |
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static int os_clock (lua_State *L) { |
lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC); |
return 1; |
} |
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/* |
** {====================================================== |
** Time/Date operations |
** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S, |
** wday=%w+1, yday=%j, isdst=? } |
** ======================================================= |
*/ |
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static void setfield (lua_State *L, const char *key, int value) { |
lua_pushinteger(L, value); |
lua_setfield(L, -2, key); |
} |
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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); |
} |
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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; |
} |
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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; |
} |
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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 */ |
} |
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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; |
} |
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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; |
} |
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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; |
} |
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/* }====================================================== */ |
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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; |
} |
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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; |
} |
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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} |
}; |
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/* }====================================================== */ |
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LUAMOD_API int luaopen_os (lua_State *L) { |
luaL_newlib(L, syslib); |
return 1; |
} |
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