prosody
5bd8b3bdbfbc
util-src/pposix.c

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util-src/pposix.c @ 1578:5bd8b3bdbfbc

pposix: Add setgid() function
author Matthew Wild <mwild1@gmail.com>
date Thu, 23 Jul 2009 03:40:01 +0100
parent 1565:f1eeb049a0a5
child 1579:95698f021c5d
comparison
equal deleted inserted replaced
1577:c0e6d11e35ce 1578:5bd8b3bdbfbc
23 #include <sys/stat.h> 23 #include <sys/stat.h>
24 #include <fcntl.h> 24 #include <fcntl.h>
25 25
26 #include <syslog.h> 26 #include <syslog.h>
27 #include <pwd.h> 27 #include <pwd.h>
28 #include <grp.h>
28 29
29 #include <string.h> 30 #include <string.h>
30 #include <errno.h> 31 #include <errno.h>
31 #include "lua.h" 32 #include "lua.h"
32 #include "lauxlib.h" 33 #include "lauxlib.h"
289 lua_pushboolean(L, 0); 290 lua_pushboolean(L, 0);
290 lua_pushstring(L, "invalid-uid"); 291 lua_pushstring(L, "invalid-uid");
291 return 2; 292 return 2;
292 } 293 }
293 294
295 int lc_setgid(lua_State* L)
296 {
297 int gid = -1;
298 if(lua_gettop(L) < 1)
299 return 0;
300 if(!lua_isnumber(L, 1) && lua_tostring(L, 1))
301 {
302 /* Passed GID is actually a string, so look up the GID */
303 struct group *g;
304 g = getgrnam(lua_tostring(L, 1));
305 if(!g)
306 {
307 lua_pushboolean(L, 0);
308 lua_pushstring(L, "no-such-group");
309 return 2;
310 }
311 gid = g->gr_gid;
312 }
313 else
314 {
315 gid = lua_tonumber(L, 1);
316 }
317
318 if(gid>-1)
319 {
320 /* Ok, attempt setgid */
321 errno = 0;
322 if(setgid(gid))
323 {
324 /* Fail */
325 lua_pushboolean(L, 0);
326 switch(errno)
327 {
328 case EINVAL:
329 lua_pushstring(L, "invalid-gid");
330 break;
331 case EPERM:
332 lua_pushstring(L, "permission-denied");
333 break;
334 default:
335 lua_pushstring(L, "unknown-error");
336 }
337 return 2;
338 }
339 else
340 {
341 /* Success! */
342 lua_pushboolean(L, 1);
343 return 1;
344 }
345 }
346
347 /* Seems we couldn't find a valid GID to switch to */
348 lua_pushboolean(L, 0);
349 lua_pushstring(L, "invalid-gid");
350 return 2;
351 }
352
294 /* Like POSIX's setrlimit()/getrlimit() API functions. 353 /* Like POSIX's setrlimit()/getrlimit() API functions.
295 * 354 *
296 * Syntax: 355 * Syntax:
297 * pposix.setrlimit( resource, soft limit, hard limit) 356 * pposix.setrlimit( resource, soft limit, hard limit)
298 * 357 *
418 lua_pushcfunction(L, lc_getpid); 477 lua_pushcfunction(L, lc_getpid);
419 lua_setfield(L, -2, "getpid"); 478 lua_setfield(L, -2, "getpid");
420 479
421 lua_pushcfunction(L, lc_getuid); 480 lua_pushcfunction(L, lc_getuid);
422 lua_setfield(L, -2, "getuid"); 481 lua_setfield(L, -2, "getuid");
482 lua_pushcfunction(L, lc_getgid);
483 lua_setfield(L, -2, "getgid");
423 484
424 lua_pushcfunction(L, lc_setuid); 485 lua_pushcfunction(L, lc_setuid);
425 lua_setfield(L, -2, "setuid"); 486 lua_setfield(L, -2, "setuid");
487 lua_pushcfunction(L, lc_setgid);
488 lua_setfield(L, -2, "setgid");
426 489
427 lua_pushcfunction(L, lc_setrlimit); 490 lua_pushcfunction(L, lc_setrlimit);
428 lua_setfield(L, -2, "setrlimit"); 491 lua_setfield(L, -2, "setrlimit");
429 492
430 lua_pushcfunction(L, lc_getrlimit); 493 lua_pushcfunction(L, lc_getrlimit);