[proxmark3-svn] / liblua / loslib.c

/*
** $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;
}
Commit	Line	Data
ba8b5c17	1	/*
	2	** $Id: loslib.c,v 1.40 2012/10/19 15:54:02 roberto Exp $
	3	** Standard Operating System library
	4	** See Copyright Notice in lua.h
	5	*/
	6
	7
	8	#include <errno.h>
	9	#include <locale.h>
	10	#include <stdlib.h>
	11	#include <string.h>
	12	#include <time.h>
	13
	14	#define loslib_c
	15	#define LUA_LIB
	16
	17	#include "lua.h"
	18
	19	#include "lauxlib.h"
	20	#include "lualib.h"
	21
	22
	23	/*
	24	** list of valid conversion specifiers for the 'strftime' function
	25	*/
	26	#if !defined(LUA_STRFTIMEOPTIONS)
	27
	28	#if !defined(LUA_USE_POSIX)
	29	#define LUA_STRFTIMEOPTIONS { "aAbBcdHIjmMpSUwWxXyYz%", "" }
	30	#else
	31	#define LUA_STRFTIMEOPTIONS \
	32	{ "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "" \
	33	"", "E", "cCxXyY", \
	34	"O", "deHImMSuUVwWy" }
	35	#endif
	36
	37	#endif
	38
	39
	40
	41	/*
	42	** By default, Lua uses tmpnam except when POSIX is available, where it
	43	** uses mkstemp.
	44	*/
	45	#if defined(LUA_USE_MKSTEMP)
	46	#include <unistd.h>
	47	#define LUA_TMPNAMBUFSIZE 32
	48	#define lua_tmpnam(b,e) { \
	49	strcpy(b, "/tmp/lua_XXXXXX"); \
	50	e = mkstemp(b); \
	51	if (e != -1) close(e); \
	52	e = (e == -1); }
	53
	54	#elif !defined(lua_tmpnam)
	55
	56	#define LUA_TMPNAMBUFSIZE L_tmpnam
	57	#define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); }
	58
	59	#endif
	60
	61
	62	/*
	63	** By default, Lua uses gmtime/localtime, except when POSIX is available,
	64	** where it uses gmtime_r/localtime_r
65	*/
66	#if defined(LUA_USE_GMTIME_R)
67
68	#define l_gmtime(t,r) gmtime_r(t,r)
69	#define l_localtime(t,r) localtime_r(t,r)
70
71	#elif !defined(l_gmtime)
72
73	#define l_gmtime(t,r) ((void)r, gmtime(t))
74	#define l_localtime(t,r) ((void)r, localtime(t))
75
76	#endif
77
78
79
80	static int os_execute (lua_State *L) {
81	const char *cmd = luaL_optstring(L, 1, NULL);
82	int stat = system(cmd);
83	if (cmd != NULL)
84	return luaL_execresult(L, stat);
85	else {
86	lua_pushboolean(L, stat); /* true if there is a shell */
87	return 1;
88	}
89	}
90
91
92	static int os_remove (lua_State *L) {
93	const char *filename = luaL_checkstring(L, 1);
94	return luaL_fileresult(L, remove(filename) == 0, filename);
95	}
96
97
98	static int os_rename (lua_State *L) {
99	const char *fromname = luaL_checkstring(L, 1);
100	const char *toname = luaL_checkstring(L, 2);
101	return luaL_fileresult(L, rename(fromname, toname) == 0, NULL);
102	}
103
104
105	static int os_tmpname (lua_State *L) {
106	char buff[LUA_TMPNAMBUFSIZE];
107	int err;
108	lua_tmpnam(buff, err);
109	if (err)
110	return luaL_error(L, "unable to generate a unique filename");
111	lua_pushstring(L, buff);
112	return 1;
113	}
114
115
116	static int os_getenv (lua_State *L) {
117	lua_pushstring(L, getenv(luaL_checkstring(L, 1))); /* if NULL push nil */
118	return 1;
119	}
120
121
122	static int os_clock (lua_State *L) {
123	lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);
124	return 1;
125	}
126
127
128	/*
129	** {======================================================
130	** Time/Date operations
131	** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,
132	** wday=%w+1, yday=%j, isdst=? }
133	** =======================================================
134	*/
135
136	static void setfield (lua_State L, const char key, int value) {
137	lua_pushinteger(L, value);
138	lua_setfield(L, -2, key);
139	}
140
141	static void setboolfield (lua_State L, const char key, int value) {
142	if (value < 0) /* undefined? */
143	return; /* does not set field */
144	lua_pushboolean(L, value);
145	lua_setfield(L, -2, key);
146	}
147
148	static int getboolfield (lua_State L, const char key) {
149	int res;
150	lua_getfield(L, -1, key);
151	res = lua_isnil(L, -1) ? -1 : lua_toboolean(L, -1);
152	lua_pop(L, 1);
153	return res;
154	}
155
156
157	static int getfield (lua_State L, const char key, int d) {
158	int res, isnum;
159	lua_getfield(L, -1, key);
160	res = (int)lua_tointegerx(L, -1, &isnum);
161	if (!isnum) {
162	if (d < 0)
163	return luaL_error(L, "field " LUA_QS " missing in date table", key);
164	res = d;
165	}
166	lua_pop(L, 1);
167	return res;
168	}
169
170
171	static const char checkoption (lua_State L, const char conv, char buff) {
172	static const char *const options[] = LUA_STRFTIMEOPTIONS;
173	unsigned int i;
174	for (i = 0; i < sizeof(options)/sizeof(options[0]); i += 2) {
175	if (conv != '\0' && strchr(options[i], conv) != NULL) {
176	buff[1] = *conv;
177	if (options[i + 1] == '\0') { / one-char conversion specifier? */
178	buff[2] = '\0'; /* end buffer */
179	return conv + 1;
180	}
181	else if (*(conv + 1) != '\0' &&
182	strchr(options[i + 1], *(conv + 1)) != NULL) {
183	buff[2] = (conv + 1); / valid two-char conversion specifier */
184	buff[3] = '\0'; /* end buffer */
185	return conv + 2;
186	}
187	}
188	}
189	luaL_argerror(L, 1,
190	lua_pushfstring(L, "invalid conversion specifier '%%%s'", conv));
191	return conv; /* to avoid warnings */
192	}
193
194
195	static int os_date (lua_State *L) {
196	const char *s = luaL_optstring(L, 1, "%c");
197	time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));
198	struct tm tmr, *stm;
199	if (s == '!') { / UTC? */
200	stm = l_gmtime(&t, &tmr);
201	s++; /* skip `!' */
202	}
203	else
204	stm = l_localtime(&t, &tmr);
205	if (stm == NULL) /* invalid date? */
206	lua_pushnil(L);
207	else if (strcmp(s, "*t") == 0) {
208	lua_createtable(L, 0, 9); /* 9 = number of fields */
209	setfield(L, "sec", stm->tm_sec);
210	setfield(L, "min", stm->tm_min);
211	setfield(L, "hour", stm->tm_hour);
212	setfield(L, "day", stm->tm_mday);
213	setfield(L, "month", stm->tm_mon+1);
214	setfield(L, "year", stm->tm_year+1900);
215	setfield(L, "wday", stm->tm_wday+1);
216	setfield(L, "yday", stm->tm_yday+1);
217	setboolfield(L, "isdst", stm->tm_isdst);
218	}
219	else {
220	char cc[4];
221	luaL_Buffer b;
222	cc[0] = '%';
223	luaL_buffinit(L, &b);
224	while (*s) {
225	if (s != '%') / no conversion specifier? */
226	luaL_addchar(&b, *s++);
227	else {
228	size_t reslen;
229	char buff[200]; /* should be big enough for any conversion result */
230	s = checkoption(L, s + 1, cc);
231	reslen = strftime(buff, sizeof(buff), cc, stm);
232	luaL_addlstring(&b, buff, reslen);
233	}
234	}
235	luaL_pushresult(&b);
236	}
237	return 1;
238	}
239
240
241	static int os_time (lua_State *L) {
242	time_t t;
243	if (lua_isnoneornil(L, 1)) /* called without args? */
244	t = time(NULL); /* get current time */
245	else {
246	struct tm ts;
247	luaL_checktype(L, 1, LUA_TTABLE);
248	lua_settop(L, 1); /* make sure table is at the top */
249	ts.tm_sec = getfield(L, "sec", 0);
250	ts.tm_min = getfield(L, "min", 0);
251	ts.tm_hour = getfield(L, "hour", 12);
252	ts.tm_mday = getfield(L, "day", -1);
253	ts.tm_mon = getfield(L, "month", -1) - 1;
254	ts.tm_year = getfield(L, "year", -1) - 1900;
255	ts.tm_isdst = getboolfield(L, "isdst");
256	t = mktime(&ts);
257	}
258	if (t == (time_t)(-1))
259	lua_pushnil(L);
260	else
261	lua_pushnumber(L, (lua_Number)t);
262	return 1;
263	}
264
265
266	static int os_difftime (lua_State *L) {
267	lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
268	(time_t)(luaL_optnumber(L, 2, 0))));
269	return 1;
270	}
271
272	/* }====================================================== */
273
274
275	static int os_setlocale (lua_State *L) {
276	static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,
277	LC_NUMERIC, LC_TIME};
278	static const char *const catnames[] = {"all", "collate", "ctype", "monetary",
279	"numeric", "time", NULL};
280	const char *l = luaL_optstring(L, 1, NULL);
281	int op = luaL_checkoption(L, 2, "all", catnames);
282	lua_pushstring(L, setlocale(cat[op], l));
283	return 1;
284	}
285
286
287	static int os_exit (lua_State *L) {
288	int status;
289	if (lua_isboolean(L, 1))
290	status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE);
291	else
292	status = luaL_optint(L, 1, EXIT_SUCCESS);
293	if (lua_toboolean(L, 2))
294	lua_close(L);
295	if (L) exit(status); /* 'if' to avoid warnings for unreachable 'return' */
296	return 0;
297	}
298
299
300	static const luaL_Reg syslib[] = {
301	{"clock", os_clock},
302	{"date", os_date},
303	{"difftime", os_difftime},
304	{"execute", os_execute},
305	{"exit", os_exit},
306	{"getenv", os_getenv},
307	{"remove", os_remove},
308	{"rename", os_rename},
309	{"setlocale", os_setlocale},
310	{"time", os_time},
311	{"tmpname", os_tmpname},
312	{NULL, NULL}
313	};
314
315	/* }====================================================== */
316
317
318
319	LUAMOD_API int luaopen_os (lua_State *L) {
320	luaL_newlib(L, syslib);
321	return 1;
322	}
323