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Remove false dependency between getgrent and setpwent
[perl5.git] / reentr.c
1 /*
2  *    reentr.c
3  *
4  *    Copyright (c) 1997-2002, Larry Wall
5  *
6  *    You may distribute under the terms of either the GNU General Public
7  *    License or the Artistic License, as specified in the README file.
8  *
9  *  !!!!!!!   DO NOT EDIT THIS FILE   !!!!!!!
10  *  This file is built by reentrl.pl from data in reentr.pl.
11  *
12  * "Saruman," I said, standing away from him, "only one hand at a time can
13  *  wield the One, and you know that well, so do not trouble to say we!"
14  *
15  */
16
17 #include "EXTERN.h"
18 #define PERL_IN_REENTR_C
19 #include "perl.h"
20 #include "reentr.h"
21
22 void
23 Perl_reentrant_size(pTHX) {
24 #ifdef USE_REENTRANT_API
25 #define REENTRANTSMALLSIZE       256    /* Make something up. */
26 #define REENTRANTUSUALSIZE      4096    /* Make something up. */
27 #ifdef HAS_ASCTIME_R
28         PL_reentrant_buffer->_asctime_size = REENTRANTSMALLSIZE;
29 #endif /* HAS_ASCTIME_R */
30 #ifdef HAS_CRYPT_R
31 #endif /* HAS_CRYPT_R */
32 #ifdef HAS_CTIME_R
33         PL_reentrant_buffer->_ctime_size = REENTRANTSMALLSIZE;
34 #endif /* HAS_CTIME_R */
35 #ifdef HAS_DRAND48_R
36 #endif /* HAS_DRAND48_R */
37 #ifdef HAS_GETGRNAM_R
38 #   if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__)
39         PL_reentrant_buffer->_grent_size = sysconf(_SC_GETPW_R_SIZE_MAX);
40         if (PL_reentrant_buffer->_pwent_size == -1)
41                 PL_reentrant_buffer->_pwent_size = REENTRANTUSUALSIZE;
42 #   else
43 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
44         PL_reentrant_buffer->_grent_size = SIABUFSIZ;
45 #       else
46 #           ifdef __sgi
47         PL_reentrant_buffer->_grent_size = BUFSIZ;
48 #           else
49         PL_reentrant_buffer->_grent_size = REENTRANTUSUALSIZE;
50 #           endif
51 #       endif
52 #   endif 
53 #endif /* HAS_GETGRNAM_R */
54 #ifdef HAS_GETHOSTBYNAME_R
55 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
56         PL_reentrant_buffer->_hostent_size = REENTRANTUSUALSIZE;
57 #endif
58 #endif /* HAS_GETHOSTBYNAME_R */
59 #ifdef HAS_GETLOGIN_R
60         PL_reentrant_buffer->_getlogin_size = REENTRANTSMALLSIZE;
61 #endif /* HAS_GETLOGIN_R */
62 #ifdef HAS_GETNETBYNAME_R
63 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
64         PL_reentrant_buffer->_netent_size = REENTRANTUSUALSIZE;
65 #endif
66 #endif /* HAS_GETNETBYNAME_R */
67 #ifdef HAS_GETPROTOBYNAME_R
68 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
69         PL_reentrant_buffer->_protoent_size = REENTRANTUSUALSIZE;
70 #endif
71 #endif /* HAS_GETPROTOBYNAME_R */
72 #ifdef HAS_GETPWNAM_R
73 #   if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__)
74         PL_reentrant_buffer->_pwent_size = sysconf(_SC_GETPW_R_SIZE_MAX);
75         if (PL_reentrant_buffer->_pwent_size == -1)
76                 PL_reentrant_buffer->_pwent_size = REENTRANTUSUALSIZE;
77 #   else
78 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
79         PL_reentrant_buffer->_pwent_size = SIABUFSIZ;
80 #       else
81 #           ifdef __sgi
82         PL_reentrant_buffer->_pwent_size = BUFSIZ;
83 #           else
84         PL_reentrant_buffer->_pwent_size = REENTRANTUSUALSIZE;
85 #           endif
86 #       endif
87 #   endif 
88 #endif /* HAS_GETPWNAM_R */
89 #ifdef HAS_GETSERVBYNAME_R
90 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
91         PL_reentrant_buffer->_servent_size = REENTRANTUSUALSIZE;
92 #endif
93 #endif /* HAS_GETSERVBYNAME_R */
94 #ifdef HAS_GETSPNAM_R
95 #   if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__)
96         PL_reentrant_buffer->_spent_size = sysconf(_SC_GETPW_R_SIZE_MAX);
97         if (PL_reentrant_buffer->_pwent_size == -1)
98                 PL_reentrant_buffer->_pwent_size = REENTRANTUSUALSIZE;
99 #   else
100 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
101         PL_reentrant_buffer->_spent_size = SIABUFSIZ;
102 #       else
103 #           ifdef __sgi
104         PL_reentrant_buffer->_spent_size = BUFSIZ;
105 #           else
106         PL_reentrant_buffer->_spent_size = REENTRANTUSUALSIZE;
107 #           endif
108 #       endif
109 #   endif 
110 #endif /* HAS_GETSPNAM_R */
111 #ifdef HAS_GMTIME_R
112 #endif /* HAS_GMTIME_R */
113 #ifdef HAS_LOCALTIME_R
114 #endif /* HAS_LOCALTIME_R */
115 #ifdef HAS_RANDOM_R
116 #endif /* HAS_RANDOM_R */
117 #ifdef HAS_READDIR_R
118         /* This is the size Solaris recommends.
119          * (though we go static, should use pathconf() instead) */
120         PL_reentrant_buffer->_readdir_size = sizeof(struct dirent) + MAXPATHLEN + 1;
121 #endif /* HAS_READDIR_R */
122 #ifdef HAS_READDIR64_R
123         /* This is the size Solaris recommends.
124          * (though we go static, should use pathconf() instead) */
125         PL_reentrant_buffer->_readdir64_size = sizeof(struct dirent64) + MAXPATHLEN + 1;
126 #endif /* HAS_READDIR64_R */
127 #ifdef HAS_SETLOCALE_R
128         PL_reentrant_buffer->_setlocale_size = REENTRANTSMALLSIZE;
129 #endif /* HAS_SETLOCALE_R */
130 #ifdef HAS_STRERROR_R
131         PL_reentrant_buffer->_strerror_size = REENTRANTSMALLSIZE;
132 #endif /* HAS_STRERROR_R */
133 #ifdef HAS_TTYNAME_R
134         PL_reentrant_buffer->_ttyname_size = REENTRANTSMALLSIZE;
135 #endif /* HAS_TTYNAME_R */
136
137 #endif /* USE_REENTRANT_API */
138 }
139
140 void
141 Perl_reentrant_init(pTHX) {
142 #ifdef USE_REENTRANT_API
143         New(31337, PL_reentrant_buffer, 1, REENTR);
144         Perl_reentrant_size(aTHX);
145 #ifdef HAS_ASCTIME_R
146         New(31338, PL_reentrant_buffer->_asctime_buffer, PL_reentrant_buffer->_asctime_size, char);
147 #endif /* HAS_ASCTIME_R */
148 #ifdef HAS_CRYPT_R
149 #ifdef __GLIBC__
150         PL_reentrant_buffer->_crypt_struct.initialized = 0;
151 #endif
152 #endif /* HAS_CRYPT_R */
153 #ifdef HAS_CTIME_R
154         New(31338, PL_reentrant_buffer->_ctime_buffer, PL_reentrant_buffer->_ctime_size, char);
155 #endif /* HAS_CTIME_R */
156 #ifdef HAS_DRAND48_R
157 #endif /* HAS_DRAND48_R */
158 #ifdef HAS_GETGRNAM_R
159 #   ifdef USE_GRENT_FPTR
160         PL_reentrant_buffer->_grent_fptr = NULL;
161 #   endif
162         New(31338, PL_reentrant_buffer->_grent_buffer, PL_reentrant_buffer->_grent_size, char);
163 #endif /* HAS_GETGRNAM_R */
164 #ifdef HAS_GETHOSTBYNAME_R
165 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
166         New(31338, PL_reentrant_buffer->_hostent_buffer, PL_reentrant_buffer->_hostent_size, char);
167 #endif
168 #endif /* HAS_GETHOSTBYNAME_R */
169 #ifdef HAS_GETLOGIN_R
170         New(31338, PL_reentrant_buffer->_getlogin_buffer, PL_reentrant_buffer->_getlogin_size, char);
171 #endif /* HAS_GETLOGIN_R */
172 #ifdef HAS_GETNETBYNAME_R
173 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
174         New(31338, PL_reentrant_buffer->_netent_buffer, PL_reentrant_buffer->_netent_size, char);
175 #endif
176 #endif /* HAS_GETNETBYNAME_R */
177 #ifdef HAS_GETPROTOBYNAME_R
178 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
179         New(31338, PL_reentrant_buffer->_protoent_buffer, PL_reentrant_buffer->_protoent_size, char);
180 #endif
181 #endif /* HAS_GETPROTOBYNAME_R */
182 #ifdef HAS_GETPWNAM_R
183 #   ifdef USE_PWENT_FPTR
184         PL_reentrant_buffer->_pwent_fptr = NULL;
185 #   endif
186         New(31338, PL_reentrant_buffer->_pwent_buffer, PL_reentrant_buffer->_pwent_size, char);
187 #endif /* HAS_GETPWNAM_R */
188 #ifdef HAS_GETSERVBYNAME_R
189 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
190         New(31338, PL_reentrant_buffer->_servent_buffer, PL_reentrant_buffer->_servent_size, char);
191 #endif
192 #endif /* HAS_GETSERVBYNAME_R */
193 #ifdef HAS_GETSPNAM_R
194 #   ifdef USE_SPENT_FPTR
195         PL_reentrant_buffer->_spent_fptr = NULL;
196 #   endif
197         New(31338, PL_reentrant_buffer->_spent_buffer, PL_reentrant_buffer->_spent_size, char);
198 #endif /* HAS_GETSPNAM_R */
199 #ifdef HAS_GMTIME_R
200 #endif /* HAS_GMTIME_R */
201 #ifdef HAS_LOCALTIME_R
202 #endif /* HAS_LOCALTIME_R */
203 #ifdef HAS_RANDOM_R
204 #endif /* HAS_RANDOM_R */
205 #ifdef HAS_READDIR_R
206         PL_reentrant_buffer->_readdir_struct = (struct dirent*)safemalloc(PL_reentrant_buffer->_readdir_size);
207 #endif /* HAS_READDIR_R */
208 #ifdef HAS_READDIR64_R
209         PL_reentrant_buffer->_readdir64_struct = (struct dirent64*)safemalloc(PL_reentrant_buffer->_readdir64_size);
210 #endif /* HAS_READDIR64_R */
211 #ifdef HAS_SETLOCALE_R
212         New(31338, PL_reentrant_buffer->_setlocale_buffer, PL_reentrant_buffer->_setlocale_size, char);
213 #endif /* HAS_SETLOCALE_R */
214 #ifdef HAS_STRERROR_R
215         New(31338, PL_reentrant_buffer->_strerror_buffer, PL_reentrant_buffer->_strerror_size, char);
216 #endif /* HAS_STRERROR_R */
217 #ifdef HAS_TTYNAME_R
218         New(31338, PL_reentrant_buffer->_ttyname_buffer, PL_reentrant_buffer->_ttyname_size, char);
219 #endif /* HAS_TTYNAME_R */
220
221 #endif /* USE_REENTRANT_API */
222 }
223
224 void
225 Perl_reentrant_free(pTHX) {
226 #ifdef USE_REENTRANT_API
227 #ifdef HAS_ASCTIME_R
228         Safefree(PL_reentrant_buffer->_asctime_buffer);
229 #endif /* HAS_ASCTIME_R */
230 #ifdef HAS_CRYPT_R
231 #endif /* HAS_CRYPT_R */
232 #ifdef HAS_CTIME_R
233         Safefree(PL_reentrant_buffer->_ctime_buffer);
234 #endif /* HAS_CTIME_R */
235 #ifdef HAS_DRAND48_R
236 #endif /* HAS_DRAND48_R */
237 #ifdef HAS_GETGRNAM_R
238         Safefree(PL_reentrant_buffer->_grent_buffer);
239 #endif /* HAS_GETGRNAM_R */
240 #ifdef HAS_GETHOSTBYNAME_R
241 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
242         Safefree(PL_reentrant_buffer->_hostent_buffer);
243 #endif
244 #endif /* HAS_GETHOSTBYNAME_R */
245 #ifdef HAS_GETLOGIN_R
246         Safefree(PL_reentrant_buffer->_getlogin_buffer);
247 #endif /* HAS_GETLOGIN_R */
248 #ifdef HAS_GETNETBYNAME_R
249 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
250         Safefree(PL_reentrant_buffer->_netent_buffer);
251 #endif
252 #endif /* HAS_GETNETBYNAME_R */
253 #ifdef HAS_GETPROTOBYNAME_R
254 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
255         Safefree(PL_reentrant_buffer->_protoent_buffer);
256 #endif
257 #endif /* HAS_GETPROTOBYNAME_R */
258 #ifdef HAS_GETPWNAM_R
259         Safefree(PL_reentrant_buffer->_pwent_buffer);
260 #endif /* HAS_GETPWNAM_R */
261 #ifdef HAS_GETSERVBYNAME_R
262 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
263         Safefree(PL_reentrant_buffer->_servent_buffer);
264 #endif
265 #endif /* HAS_GETSERVBYNAME_R */
266 #ifdef HAS_GETSPNAM_R
267         Safefree(PL_reentrant_buffer->_spent_buffer);
268 #endif /* HAS_GETSPNAM_R */
269 #ifdef HAS_GMTIME_R
270 #endif /* HAS_GMTIME_R */
271 #ifdef HAS_LOCALTIME_R
272 #endif /* HAS_LOCALTIME_R */
273 #ifdef HAS_RANDOM_R
274 #endif /* HAS_RANDOM_R */
275 #ifdef HAS_READDIR_R
276         Safefree(PL_reentrant_buffer->_readdir_struct);
277 #endif /* HAS_READDIR_R */
278 #ifdef HAS_READDIR64_R
279         Safefree(PL_reentrant_buffer->_readdir64_struct);
280 #endif /* HAS_READDIR64_R */
281 #ifdef HAS_SETLOCALE_R
282         Safefree(PL_reentrant_buffer->_setlocale_buffer);
283 #endif /* HAS_SETLOCALE_R */
284 #ifdef HAS_STRERROR_R
285         Safefree(PL_reentrant_buffer->_strerror_buffer);
286 #endif /* HAS_STRERROR_R */
287 #ifdef HAS_TTYNAME_R
288         Safefree(PL_reentrant_buffer->_ttyname_buffer);
289 #endif /* HAS_TTYNAME_R */
290
291         Safefree(PL_reentrant_buffer);
292 #endif /* USE_REENTRANT_API */
293 }
294
295 void*
296 Perl_reentrant_retry(const char *f, ...)
297 {
298     dTHX;
299     void *retptr = NULL;
300 #ifdef USE_REENTRANT_API
301 #  if defined(USE_HOSTENT_BUFFER) || defined(USE_GRENT_BUFFER) || defined(USE_NETENT_BUFFER) || defined(USE_PWENT_BUFFER) || defined(USE_PROTOENT_BUFFER) || defined(USE_SRVENT_BUFFER)
302     void *p0;
303 #  endif
304 #  if defined(USE_SERVENT_BUFFER)
305     void *p1;
306 #  endif
307 #  if defined(USE_HOSTENT_BUFFER)
308     size_t asize;
309 #  endif
310 #  if defined(USE_HOSTENT_BUFFER) || defined(USE_NETENT_BUFFER) || defined(USE_PROTOENT_BUFFER) || defined(USE_SERVENT_BUFFER)
311     int anint;
312 #  endif
313     va_list ap;
314
315     va_start(ap, f);
316
317 #define REENTRANTHALFMAXSIZE 32768 /* The maximum may end up twice this. */
318
319     switch (PL_op->op_type) {
320 #ifdef USE_HOSTENT_BUFFER
321     case OP_GHBYADDR:
322     case OP_GHBYNAME:
323     case OP_GHOSTENT:
324         {
325             if (PL_reentrant_buffer->_hostent_size <= REENTRANTHALFMAXSIZE) {
326                 PL_reentrant_buffer->_hostent_size *= 2;
327                 Renew(PL_reentrant_buffer->_hostent_buffer,
328                       PL_reentrant_buffer->_hostent_size, char);
329                 switch (PL_op->op_type) {
330                 case OP_GHBYADDR:
331                     p0    = va_arg(ap, void *);
332                     asize = va_arg(ap, size_t);
333                     anint  = va_arg(ap, int);
334                     retptr = gethostbyaddr(p0, asize, anint); break;
335                 case OP_GHBYNAME:
336                     p0 = va_arg(ap, void *);
337                     retptr = gethostbyname(p0); break;
338                 case OP_GHOSTENT:
339                     retptr = gethostent(); break;
340                 default:
341                     break;
342                 }
343             }
344         }
345         break;
346 #endif
347 #ifdef USE_GRENT_BUFFER
348     case OP_GGRNAM:
349     case OP_GGRGID:
350     case OP_GGRENT:
351         {
352             if (PL_reentrant_buffer->_grent_size <= REENTRANTHALFMAXSIZE) {
353                 Gid_t gid;
354                 PL_reentrant_buffer->_grent_size *= 2;
355                 Renew(PL_reentrant_buffer->_grent_buffer,
356                       PL_reentrant_buffer->_grent_size, char);
357                 switch (PL_op->op_type) {
358                 case OP_GGRNAM:
359                     p0 = va_arg(ap, void *);
360                     retptr = getgrnam(p0); break;
361                 case OP_GGRGID:
362                     gid = va_arg(ap, Gid_t);
363                     retptr = getgrgid(gid); break;
364                 case OP_GGRENT:
365                     retptr = getgrent(); break;
366                 default:
367                     break;
368                 }
369             }
370         }
371         break;
372 #endif
373 #ifdef USE_NETENT_BUFFER
374     case OP_GNBYADDR:
375     case OP_GNBYNAME:
376     case OP_GNETENT:
377         {
378             if (PL_reentrant_buffer->_netent_size <= REENTRANTHALFMAXSIZE) {
379                 Netdb_net_t net;
380                 PL_reentrant_buffer->_netent_size *= 2;
381                 Renew(PL_reentrant_buffer->_netent_buffer,
382                       PL_reentrant_buffer->_netent_size, char);
383                 switch (PL_op->op_type) {
384                 case OP_GNBYADDR:
385                     net = va_arg(ap, Netdb_net_t);
386                     anint = va_arg(ap, int);
387                     retptr = getnetbyaddr(net, anint); break;
388                 case OP_GNBYNAME:
389                     p0 = va_arg(ap, void *);
390                     retptr = getnetbyname(p0); break;
391                 case OP_GNETENT:
392                     retptr = getnetent(); break;
393                 default:
394                     break;
395                 }
396             }
397         }
398         break;
399 #endif
400 #ifdef USE_PWENT_BUFFER
401     case OP_GPWNAM:
402     case OP_GPWUID:
403     case OP_GPWENT:
404         {
405             if (PL_reentrant_buffer->_pwent_size <= REENTRANTHALFMAXSIZE) {
406                 Uid_t uid;
407                 PL_reentrant_buffer->_pwent_size *= 2;
408                 Renew(PL_reentrant_buffer->_pwent_buffer,
409                       PL_reentrant_buffer->_pwent_size, char);
410                 switch (PL_op->op_type) {
411                 case OP_GPWNAM:
412                     p0 = va_arg(ap, void *);
413                     retptr = getpwnam(p0); break;
414                 case OP_GPWUID:
415                     uid = va_arg(ap, Uid_t);
416                     retptr = getpwuid(uid); break;
417                 case OP_GPWENT:
418                     retptr = getpwent(); break;
419                 default:
420                     break;
421                 }
422             }
423         }
424         break;
425 #endif
426 #ifdef USE_PROTOENT_BUFFER
427     case OP_GPBYNAME:
428     case OP_GPBYNUMBER:
429     case OP_GPROTOENT:
430         {
431             if (PL_reentrant_buffer->_protoent_size <= REENTRANTHALFMAXSIZE) {
432                 PL_reentrant_buffer->_protoent_size *= 2;
433                 Renew(PL_reentrant_buffer->_protoent_buffer,
434                       PL_reentrant_buffer->_protoent_size, char);
435                 switch (PL_op->op_type) {
436                 case OP_GPBYNAME:
437                     p0 = va_arg(ap, void *);
438                     retptr = getprotobyname(p0); break;
439                 case OP_GPBYNUMBER:
440                     anint = va_arg(ap, int);
441                     retptr = getprotobynumber(anint); break;
442                 case OP_GPROTOENT:
443                     retptr = getprotoent(); break;
444                 default:
445                     break;
446                 }
447             }
448         }
449         break;
450 #endif
451 #ifdef USE_SERVENT_BUFFER
452     case OP_GSBYNAME:
453     case OP_GSBYPORT:
454     case OP_GSERVENT:
455         {
456             if (PL_reentrant_buffer->_servent_size <= REENTRANTHALFMAXSIZE) {
457                 PL_reentrant_buffer->_servent_size *= 2;
458                 Renew(PL_reentrant_buffer->_servent_buffer,
459                       PL_reentrant_buffer->_servent_size, char);
460                 switch (PL_op->op_type) {
461                 case OP_GSBYNAME:
462                     p0 = va_arg(ap, void *);
463                     p1 = va_arg(ap, void *);
464                     retptr = getservbyname(p0, p1); break;
465                 case OP_GSBYPORT:
466                     anint = va_arg(ap, int);
467                     p0 = va_arg(ap, void *);
468                     retptr = getservbyport(anint, p0); break;
469                 case OP_GSERVENT:
470                     retptr = getservent(); break;
471                 default:
472                     break;
473                 }
474             }
475         }
476         break;
477 #endif
478     default:
479         /* Not known how to retry, so just fail. */
480         break;
481     }
482
483     va_end(ap);
484 #endif
485     return retptr;
486 }
487