1/*
2** OS library.
3** Copyright (C) 2005-2021 Mike Pall. See Copyright Notice in luajit.h
4**
5** Major portions taken verbatim or adapted from the Lua interpreter.
6** Copyright (C) 1994-2008 Lua.org, PUC-Rio. See Copyright Notice in lua.h
7*/
8
9#include <errno.h>
10#include <time.h>
11
12#define lib_os_c
13#define LUA_LIB
14
15#include "lua.h"
16#include "lauxlib.h"
17#include "lualib.h"
18
19#include "lj_obj.h"
20#include "lj_gc.h"
21#include "lj_err.h"
22#include "lj_buf.h"
23#include "lj_str.h"
24#include "lj_lib.h"
25
26#if LJ_TARGET_POSIX
27#include <unistd.h>
28#else
29#include <stdio.h>
30#endif
31
32#if !LJ_TARGET_PSVITA
33#include <locale.h>
34#endif
35
36/* ------------------------------------------------------------------------ */
37
38#define LJLIB_MODULE_os
39
40LJLIB_CF(os_execute)
41{
42#if LJ_NO_SYSTEM
43#if LJ_52
44 errno = ENOSYS;
45 return luaL_fileresult(L, 0, NULL);
46#else
47 lua_pushinteger(L, -1);
48 return 1;
49#endif
50#else
51 const char *cmd = luaL_optstring(L, 1, NULL);
52 int stat = system(cmd);
53#if LJ_52
54 if (cmd)
55 return luaL_execresult(L, stat);
56 setboolV(L->top++, 1);
57#else
58 setintV(L->top++, stat);
59#endif
60 return 1;
61#endif
62}
63
64LJLIB_CF(os_remove)
65{
66 const char *filename = luaL_checkstring(L, 1);
67 return luaL_fileresult(L, remove(filename) == 0, filename);
68}
69
70LJLIB_CF(os_rename)
71{
72 const char *fromname = luaL_checkstring(L, 1);
73 const char *toname = luaL_checkstring(L, 2);
74 return luaL_fileresult(L, rename(fromname, toname) == 0, fromname);
75}
76
77LJLIB_CF(os_tmpname)
78{
79#if LJ_TARGET_PS3 || LJ_TARGET_PS4 || LJ_TARGET_PSVITA
80 lj_err_caller(L, LJ_ERR_OSUNIQF);
81 return 0;
82#else
83#if LJ_TARGET_POSIX
84 char buf[15+1];
85 int fp;
86 strcpy(buf, "/tmp/lua_XXXXXX");
87 fp = mkstemp(buf);
88 if (fp != -1)
89 close(fp);
90 else
91 lj_err_caller(L, LJ_ERR_OSUNIQF);
92#else
93 char buf[L_tmpnam];
94 if (tmpnam(buf) == NULL)
95 lj_err_caller(L, LJ_ERR_OSUNIQF);
96#endif
97 lua_pushstring(L, buf);
98 return 1;
99#endif
100}
101
102LJLIB_CF(os_getenv)
103{
104#if LJ_TARGET_CONSOLE
105 lua_pushnil(L);
106#else
107 lua_pushstring(L, getenv(luaL_checkstring(L, 1))); /* if NULL push nil */
108#endif
109 return 1;
110}
111
112LJLIB_CF(os_exit)
113{
114 int status;
115 if (L->base < L->top && tvisbool(L->base))
116 status = boolV(L->base) ? EXIT_SUCCESS : EXIT_FAILURE;
117 else
118 status = lj_lib_optint(L, 1, EXIT_SUCCESS);
119 if (L->base+1 < L->top && tvistruecond(L->base+1))
120 lua_close(L);
121 exit(status);
122 return 0; /* Unreachable. */
123}
124
125LJLIB_CF(os_clock)
126{
127 setnumV(L->top++, ((lua_Number)clock())*(1.0/(lua_Number)CLOCKS_PER_SEC));
128 return 1;
129}
130
131/* ------------------------------------------------------------------------ */
132
133static void setfield(lua_State *L, const char *key, int value)
134{
135 lua_pushinteger(L, value);
136 lua_setfield(L, -2, key);
137}
138
139static void setboolfield(lua_State *L, const char *key, int value)
140{
141 if (value < 0) /* undefined? */
142 return; /* does not set field */
143 lua_pushboolean(L, value);
144 lua_setfield(L, -2, key);
145}
146
147static int getboolfield(lua_State *L, const char *key)
148{
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
156static int getfield(lua_State *L, const char *key, int d)
157{
158 int res;
159 lua_getfield(L, -1, key);
160 if (lua_isnumber(L, -1)) {
161 res = (int)lua_tointeger(L, -1);
162 } else {
163 if (d < 0)
164 lj_err_callerv(L, LJ_ERR_OSDATEF, key);
165 res = d;
166 }
167 lua_pop(L, 1);
168 return res;
169}
170
171LJLIB_CF(os_date)
172{
173 const char *s = luaL_optstring(L, 1, "%c");
174 time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));
175 struct tm *stm;
176#if LJ_TARGET_POSIX
177 struct tm rtm;
178#endif
179 if (*s == '!') { /* UTC? */
180 s++; /* Skip '!' */
181#if LJ_TARGET_POSIX
182 stm = gmtime_r(&t, &rtm);
183#else
184 stm = gmtime(&t);
185#endif
186 } else {
187#if LJ_TARGET_POSIX
188 stm = localtime_r(&t, &rtm);
189#else
190 stm = localtime(&t);
191#endif
192 }
193 if (stm == NULL) { /* Invalid date? */
194 setnilV(L->top++);
195 } else if (strcmp(s, "*t") == 0) {
196 lua_createtable(L, 0, 9); /* 9 = number of fields */
197 setfield(L, "sec", stm->tm_sec);
198 setfield(L, "min", stm->tm_min);
199 setfield(L, "hour", stm->tm_hour);
200 setfield(L, "day", stm->tm_mday);
201 setfield(L, "month", stm->tm_mon+1);
202 setfield(L, "year", stm->tm_year+1900);
203 setfield(L, "wday", stm->tm_wday+1);
204 setfield(L, "yday", stm->tm_yday+1);
205 setboolfield(L, "isdst", stm->tm_isdst);
206 } else if (*s) {
207 SBuf *sb = &G(L)->tmpbuf;
208 MSize sz = 0, retry = 4;
209 const char *q;
210 for (q = s; *q; q++)
211 sz += (*q == '%') ? 30 : 1; /* Overflow doesn't matter. */
212 setsbufL(sb, L);
213 while (retry--) { /* Limit growth for invalid format or empty result. */
214 char *buf = lj_buf_need(sb, sz);
215 size_t len = strftime(buf, sbufsz(sb), s, stm);
216 if (len) {
217 setstrV(L, L->top++, lj_str_new(L, buf, len));
218 lj_gc_check(L);
219 break;
220 }
221 sz += (sz|1);
222 }
223 } else {
224 setstrV(L, L->top++, &G(L)->strempty);
225 }
226 return 1;
227}
228
229LJLIB_CF(os_time)
230{
231 time_t t;
232 if (lua_isnoneornil(L, 1)) { /* called without args? */
233 t = time(NULL); /* get current time */
234 } else {
235 struct tm ts;
236 luaL_checktype(L, 1, LUA_TTABLE);
237 lua_settop(L, 1); /* make sure table is at the top */
238 ts.tm_sec = getfield(L, "sec", 0);
239 ts.tm_min = getfield(L, "min", 0);
240 ts.tm_hour = getfield(L, "hour", 12);
241 ts.tm_mday = getfield(L, "day", -1);
242 ts.tm_mon = getfield(L, "month", -1) - 1;
243 ts.tm_year = getfield(L, "year", -1) - 1900;
244 ts.tm_isdst = getboolfield(L, "isdst");
245 t = mktime(&ts);
246 }
247 if (t == (time_t)(-1))
248 lua_pushnil(L);
249 else
250 lua_pushnumber(L, (lua_Number)t);
251 return 1;
252}
253
254LJLIB_CF(os_difftime)
255{
256 lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
257 (time_t)(luaL_optnumber(L, 2, (lua_Number)0))));
258 return 1;
259}
260
261/* ------------------------------------------------------------------------ */
262
263LJLIB_CF(os_setlocale)
264{
265#if LJ_TARGET_PSVITA
266 lua_pushliteral(L, "C");
267#else
268 GCstr *s = lj_lib_optstr(L, 1);
269 const char *str = s ? strdata(s) : NULL;
270 int opt = lj_lib_checkopt(L, 2, 6,
271 "\5ctype\7numeric\4time\7collate\10monetary\1\377\3all");
272 if (opt == 0) opt = LC_CTYPE;
273 else if (opt == 1) opt = LC_NUMERIC;
274 else if (opt == 2) opt = LC_TIME;
275 else if (opt == 3) opt = LC_COLLATE;
276 else if (opt == 4) opt = LC_MONETARY;
277 else if (opt == 6) opt = LC_ALL;
278 lua_pushstring(L, setlocale(opt, str));
279#endif
280 return 1;
281}
282
283/* ------------------------------------------------------------------------ */
284
285#include "lj_libdef.h"
286
287LUALIB_API int luaopen_os(lua_State *L)
288{
289 LJ_LIB_REG(L, LUA_OSLIBNAME, os);
290 return 1;
291}
292
293