source: branches/samba-3.2.x/examples/libsmbclient/smbwrapper/wrapper.c

Last change on this file was 133, checked in by Paul Smedley, 17 years ago

Update trunk to 3.2.0pre3
File size: 44.9 KB
Line 
1/*
2 Unix SMB/Netbios implementation.
3 Version 2.0
4 SMB wrapper functions
5 Copyright (C) Andrew Tridgell 1998
6 Copyright (C) Derrell Lipman 2002-2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20*/
21
22/*
23 * This is a rewrite of the original wrapped.c file, using libdl to obtain
24 * pointers into the C library rather than attempting to find undocumented
25 * functions in the C library to call for native file access. The problem
26 * with the original implementation's paradigm is that samba manipulates
27 * defines such that it gets the sizes of structures that it wants
28 * (e.g. mapping 32-bit functions to 64-bit functions with their associated
29 * 64-bit structure fields), but programs run under smbsh or using
30 * smbwrapper.so were not necessarily compiled with the same flags. As an
31 * example of the problem, a program calling stat() passes a pointer to a
32 * "struct stat" but the fields in that structure are different in samba than
33 * they are in the calling program if the calling program was not compiled to
34 * force stat() to be mapped to stat64().
35 *
36 * In this version, we provide an interface to each of the native functions,
37 * not just the ones that samba is compiled to map to. We obtain the function
38 * pointers from the C library using dlsym(), and for native file operations,
39 * directly call the same function that the calling application was
40 * requesting. Since the size of the calling application's structures vary
41 * depending on what function was called, we use our own internal structures
42 * for passing information to/from the SMB equivalent functions, and map them
43 * back to the native structures before returning the result to the caller.
44 *
45 * This implementation was completed 25 December 2002.
46 * Derrell Lipman
47 */
48
49/* We do not want auto munging of 32->64 bit names in this file (only) */
50#undef _FILE_OFFSET_BITS
51#undef _GNU_SOURCE
52
53#include <sys/types.h>
54#include <sys/stat.h>
55#include <sys/time.h>
56#include <stdlib.h>
57#include <fcntl.h>
58#include <unistd.h>
59#include <utime.h>
60#include <stdio.h>
61#include <dirent.h>
62#include <signal.h>
63#include <stdarg.h>
64#include <string.h>
65#ifdef __USE_GNU
66# define SMBW_USE_GNU
67#endif
68#define __USE_GNU /* need this to have RTLD_NEXT defined */
69#include <dlfcn.h>
70#ifndef SMBW_USE_GNU
71# undef __USE_GNU
72#endif
73#include <errno.h>
74#include "libsmbclient.h"
75#include "bsd-strlfunc.h"
76#include "wrapper.h"
77
78/*
79 * Debug bits:
80 * 0x0 = none
81 * 0x1 = display symbol definitions not found in C library
82 * 0x2 = show wrapper functions being called
83 * 0x4 = log to file SMBW_DEBUG_FILE instead of stderr
84 */
85#define SMBW_DEBUG 0x0
86#define SMBW_DEBUG_FILE "/tmp/smbw.log"
87
88int smbw_debug = 0;
89
90#if SMBW_DEBUG & 0x2
91static int debugFd = 2;
92#endif
93
94#ifndef ENOTSUP
95#define ENOTSUP EOPNOTSUPP
96#endif
97
98/*
99 * None of the methods of having the initialization function called
100 * automatically upon shared library startup are effective in all situations.
101 * We provide the "-init" parameter to the linker which is effective most of
102 * the time, but fails for applications that provide their own shared
103 * libraries with _init() functions (e.g. ps). We can't use "-z initfirst"
104 * because the environment isn't yet set up at that point, so we can't find
105 * our shared memory identifier (see shared.c). We therefore must resort to
106 * this tried-and-true method of keeping an "initialized" flag. We check it
107 * prior to calling the initialize() function to save a function call (a slow
108 * operation on x86).
109 */
110#if SMBW_DEBUG & 0x2
111# define check_init(buf) \
112 do { \
113 int saved_errno = errno; \
114 if (! initialized) initialize(); \
115 (* smbw_libc.write)(debugFd, "["buf"]", sizeof(buf)+1); \
116 errno = saved_errno; \
117 } while (0)
118#else
119# define check_init(buf) \
120 do { \
121 if (! initialized) smbw_initialize(); \
122 } while (0)
123#endif
124
125static void initialize(void);
126
127static int initialized = 0;
128
129SMBW_libc_pointers smbw_libc;
130
131/*
132 * A public entry point used by the "-init" option to the linker.
133 */
134void smbw_initialize(void)
135{
136 initialize();
137}
138
139static void initialize(void)
140{
141 int saved_errno;
142#if SMBW_DEBUG & 0x1
143 char *error;
144#endif
145
146 saved_errno = errno;
147
148 if (initialized) {
149 return;
150 }
151 initialized = 1;
152
153#if SMBW_DEBUG & 0x1
154# define GETSYM(symname, symstring) \
155 if ((smbw_libc.symname = dlsym(RTLD_NEXT, symstring)) == NULL) { \
156 if (smbw_libc.write != NULL && \
157 (error = dlerror()) != NULL) { \
158 (* smbw_libc.write)(1, error, strlen(error)); \
159 (* smbw_libc.write)(1, "\n", 1); \
160 } \
161 }
162#else
163# define GETSYM(symname, symstring) \
164 smbw_libc.symname = dlsym(RTLD_NEXT, symstring);
165#endif
166
167 /*
168 * Get pointers to each of the symbols we'll need, from the C library
169 *
170 * Some of these symbols may not be found in the C library. That's
171 * fine. We declare all of them here, and if the C library supports
172 * them, they may be called so we have the wrappers for them. If the
173 * C library doesn't support them, then the wrapper function will
174 * never be called, and the null pointer will never be dereferenced.
175 */
176 GETSYM(write, "write"); /* first, to allow debugging */
177 GETSYM(open, "open");
178 GETSYM(_open, "_open");
179 GETSYM(__open, "__open");
180 GETSYM(open64, "open64");
181 GETSYM(_open64, "_open64");
182 GETSYM(__open64, "__open64");
183 GETSYM(pread, "pread");
184 GETSYM(pread64, "pread64");
185 GETSYM(pwrite, "pwrite");
186 GETSYM(pwrite64, "pwrite64");
187 GETSYM(close, "close");
188 GETSYM(__close, "__close");
189 GETSYM(_close, "_close");
190 GETSYM(fcntl, "fcntl");
191 GETSYM(__fcntl, "__fcntl");
192 GETSYM(_fcntl, "_fcntl");
193 GETSYM(getdents, "getdents");
194 GETSYM(__getdents, "__getdents");
195 GETSYM(_getdents, "_getdents");
196 GETSYM(getdents64, "getdents64");
197 GETSYM(lseek, "lseek");
198 GETSYM(__lseek, "__lseek");
199 GETSYM(_lseek, "_lseek");
200 GETSYM(lseek64, "lseek64");
201 GETSYM(__lseek64, "__lseek64");
202 GETSYM(_lseek64, "_lseek64");
203 GETSYM(read, "read");
204 GETSYM(__read, "__read");
205 GETSYM(_read, "_read");
206 GETSYM(__write, "__write");
207 GETSYM(_write, "_write");
208 GETSYM(access, "access");
209 GETSYM(chmod, "chmod");
210 GETSYM(fchmod, "fchmod");
211 GETSYM(chown, "chown");
212 GETSYM(fchown, "fchown");
213 GETSYM(__xstat, "__xstat");
214 GETSYM(getcwd, "getcwd");
215 GETSYM(mkdir, "mkdir");
216 GETSYM(__fxstat, "__fxstat");
217 GETSYM(__lxstat, "__lxstat");
218 GETSYM(stat, "stat");
219 GETSYM(lstat, "lstat");
220 GETSYM(fstat, "fstat");
221 GETSYM(unlink, "unlink");
222 GETSYM(utime, "utime");
223 GETSYM(utimes, "utimes");
224 GETSYM(readlink, "readlink");
225 GETSYM(rename, "rename");
226 GETSYM(rmdir, "rmdir");
227 GETSYM(symlink, "symlink");
228 GETSYM(dup, "dup");
229 GETSYM(dup2, "dup2");
230 GETSYM(opendir, "opendir");
231 GETSYM(readdir, "readdir");
232 GETSYM(closedir, "closedir");
233 GETSYM(telldir, "telldir");
234 GETSYM(seekdir, "seekdir");
235 GETSYM(creat, "creat");
236 GETSYM(creat64, "creat64");
237 GETSYM(__xstat64, "__xstat64");
238 GETSYM(stat64, "stat64");
239 GETSYM(__fxstat64, "__fxstat64");
240 GETSYM(fstat64, "fstat64");
241 GETSYM(__lxstat64, "__lxstat64");
242 GETSYM(lstat64, "lstat64");
243 GETSYM(_llseek, "_llseek");
244 GETSYM(readdir64, "readdir64");
245 GETSYM(readdir_r, "readdir_r");
246 GETSYM(readdir64_r, "readdir64_r");
247 GETSYM(setxattr, "setxattr");
248 GETSYM(lsetxattr, "lsetxattr");
249 GETSYM(fsetxattr, "fsetxattr");
250 GETSYM(getxattr, "getxattr");
251 GETSYM(lgetxattr, "lgetxattr");
252 GETSYM(fgetxattr, "fgetxattr");
253 GETSYM(removexattr, "removexattr");
254 GETSYM(lremovexattr, "lremovexattr");
255 GETSYM(fremovexattr, "fremovexattr");
256 GETSYM(listxattr, "listxattr");
257 GETSYM(llistxattr, "llistxattr");
258 GETSYM(flistxattr, "flistxattr");
259 GETSYM(chdir, "chdir");
260 GETSYM(fchdir, "fchdir");
261 GETSYM(fork, "fork");
262 GETSYM(select, "select");
263 GETSYM(_select, "_select");
264 GETSYM(__select, "__select");
265
266#if SMBW_DEBUG & 4
267 {
268 if ((debugFd =
269 open(SMBW_DEBUG_FILE, O_WRONLY | O_CREAT | O_APPEND)) < 0)
270 {
271# define SMBW_MESSAGE "Could not create " SMBW_DEBUG_FILE "\n"
272 (* smbw_libc.write)(1, SMBW_MESSAGE, sizeof(SMBW_MESSAGE));
273# undef SMBW_MESSAGE
274 exit(1);
275 }
276 }
277#endif
278
279 errno = saved_errno;
280}
281
282/**
283 ** Static Functions
284 **/
285
286static void stat_convert(struct SMBW_stat *src, struct stat *dest)
287{
288 memset(dest, '\0', sizeof(*dest));
289 dest->st_size = src->s_size;
290 dest->st_mode = src->s_mode;
291 dest->st_ino = src->s_ino;
292 dest->st_dev = src->s_dev;
293 dest->st_rdev = src->s_rdev;
294 dest->st_nlink = src->s_nlink;
295 dest->st_uid = src->s_uid;
296 dest->st_gid = src->s_gid;
297 dest->st_atime = src->s_atime;
298 dest->st_mtime = src->s_mtime;
299 dest->st_ctime = src->s_ctime;
300 dest->st_blksize = src->s_blksize;
301 dest->st_blocks = src->s_blocks;
302}
303
304static void stat64_convert(struct SMBW_stat *src, struct stat64 *dest)
305{
306 memset(dest, '\0', sizeof(*dest));
307 dest->st_size = src->s_size;
308 dest->st_mode = src->s_mode;
309 dest->st_ino = src->s_ino;
310 dest->st_dev = src->s_dev;
311 dest->st_rdev = src->s_rdev;
312 dest->st_nlink = src->s_nlink;
313 dest->st_uid = src->s_uid;
314 dest->st_gid = src->s_gid;
315 dest->st_atime = src->s_atime;
316 dest->st_mtime = src->s_mtime;
317 dest->st_ctime = src->s_ctime;
318 dest->st_blksize = src->s_blksize;
319 dest->st_blocks = src->s_blocks;
320}
321
322static void dirent_convert(struct SMBW_dirent *src, struct dirent *dest)
323{
324 char *p;
325
326 memset(dest, '\0', sizeof(*dest));
327 dest->d_ino = src->d_ino;
328 dest->d_off = src->d_off;
329
330 switch(src->d_type)
331 {
332 case SMBC_WORKGROUP:
333 case SMBC_SERVER:
334 case SMBC_FILE_SHARE:
335 case SMBC_DIR:
336 dest->d_type = DT_DIR;
337 break;
338
339 case SMBC_FILE:
340 dest->d_type = DT_REG;
341 break;
342
343 case SMBC_PRINTER_SHARE:
344 dest->d_type = DT_CHR;
345 break;
346
347 case SMBC_COMMS_SHARE:
348 dest->d_type = DT_SOCK;
349 break;
350
351 case SMBC_IPC_SHARE:
352 dest->d_type = DT_FIFO;
353 break;
354
355 case SMBC_LINK:
356 dest->d_type = DT_LNK;
357 break;
358 }
359
360 dest->d_reclen = src->d_reclen;
361 smbw_strlcpy(dest->d_name, src->d_name, sizeof(dest->d_name));
362 p = dest->d_name + strlen(dest->d_name) + 1;
363 smbw_strlcpy(p,
364 src->d_comment,
365 sizeof(dest->d_name) - (p - dest->d_name));
366}
367
368static void dirent64_convert(struct SMBW_dirent *src, struct dirent64 *dest)
369{
370 char *p;
371
372 memset(dest, '\0', sizeof(*dest));
373 dest->d_ino = src->d_ino;
374 dest->d_off = src->d_off;
375
376 switch(src->d_type)
377 {
378 case SMBC_WORKGROUP:
379 case SMBC_SERVER:
380 case SMBC_FILE_SHARE:
381 case SMBC_DIR:
382 dest->d_type = DT_DIR;
383 break;
384
385 case SMBC_FILE:
386 dest->d_type = DT_REG;
387 break;
388
389 case SMBC_PRINTER_SHARE:
390 dest->d_type = DT_CHR;
391 break;
392
393 case SMBC_COMMS_SHARE:
394 dest->d_type = DT_SOCK;
395 break;
396
397 case SMBC_IPC_SHARE:
398 dest->d_type = DT_FIFO;
399 break;
400
401 case SMBC_LINK:
402 dest->d_type = DT_LNK;
403 break;
404 }
405
406 dest->d_reclen = src->d_reclen;
407 smbw_strlcpy(dest->d_name, src->d_name, sizeof(dest->d_name));
408 p = dest->d_name + strlen(dest->d_name) + 1;
409 smbw_strlcpy(p,
410 src->d_comment,
411 sizeof(dest->d_name) - (p - dest->d_name));
412}
413
414static int openx(char *name, int flags, mode_t mode, int (* f)(char *, int, mode_t))
415{
416 if (smbw_path(name)) {
417 return smbw_open(name, flags, mode);
418 }
419
420 return (* f)(name, flags, mode);
421}
422
423static int closex(int fd, int (* f)(int fd))
424{
425 if (smbw_fd(fd)) {
426 return smbw_close(fd);
427 }
428
429 return (* f)(fd);
430}
431
432static int fcntlx(int fd, int cmd, long arg, int (* f)(int, int, long))
433{
434 if (smbw_fd(fd)) {
435 return smbw_fcntl(fd, cmd, arg);
436 }
437
438 return (* f)(fd, cmd, arg);
439}
440
441static int getdentsx(int fd, struct dirent *external, unsigned int count, int (* f)(int, struct dirent *, unsigned int))
442{
443 if (smbw_fd(fd)) {
444 int i;
445 int internal_count;
446 struct SMBW_dirent *internal;
447 int ret;
448 int n;
449
450 /*
451 * LIMITATION: If they pass a count which is not a multiple of
452 * the size of struct dirent, they will not get a partial
453 * structure; we ignore the excess count.
454 */
455 n = (count / sizeof(struct dirent));
456
457 internal_count = sizeof(struct SMBW_dirent) * n;
458 internal = malloc(internal_count);
459 if (internal == NULL) {
460 errno = ENOMEM;
461 return -1;
462 }
463 ret = smbw_getdents(fd, internal, internal_count);
464 if (ret <= 0)
465 return ret;
466
467 ret = sizeof(struct dirent) * n;
468
469 for (i = 0; i < n; i++)
470 dirent_convert(&internal[i], &external[i]);
471
472 return ret;
473 }
474
475 return (* f)(fd, external, count);
476}
477
478static off_t lseekx(int fd,
479 off_t offset,
480 int whence,
481 off_t (* f)(int, off_t, int))
482{
483 off_t ret;
484
485 /*
486 * We have left the definitions of the smbw_ functions undefined,
487 * because types such as off_t can differ in meaning betweent his
488 * function and smbw.c et al. Functions that return other than an
489 * integer value, however, MUST have their return value defined.
490 */
491 off64_t smbw_lseek();
492
493 if (smbw_fd(fd)) {
494 return (off_t) smbw_lseek(fd, offset, whence);
495 }
496
497 ret = (* f)(fd, offset, whence);
498 if (smbw_debug)
499 {
500 printf("lseekx(%d, 0x%llx) returned 0x%llx\n",
501 fd,
502 (unsigned long long) offset,
503 (unsigned long long) ret);
504 }
505 return ret;
506}
507
508static off64_t lseek64x(int fd,
509 off64_t offset,
510 int whence,
511 off64_t (* f)(int, off64_t, int))
512{
513 off64_t ret;
514
515 /*
516 * We have left the definitions of the smbw_ functions undefined,
517 * because types such as off_t can differ in meaning betweent his
518 * function and smbw.c et al. Functions that return other than an
519 * integer value, however, MUST have their return value defined.
520 */
521 off64_t smbw_lseek();
522
523 if (smbw_fd(fd))
524 ret = smbw_lseek(fd, offset, whence);
525 else
526 ret = (* f)(fd, offset, whence);
527 if (smbw_debug)
528 {
529 printf("lseek64x(%d, 0x%llx) returned 0x%llx\n",
530 fd,
531 (unsigned long long) offset,
532 (unsigned long long) ret);
533 }
534 return ret;
535}
536
537static ssize_t readx(int fd, void *buf, size_t count, ssize_t (* f)(int, void *, size_t))
538{
539 if (smbw_fd(fd)) {
540 return smbw_read(fd, buf, count);
541 }
542
543 return (* f)(fd, buf, count);
544}
545
546static ssize_t writex(int fd, void *buf, size_t count, ssize_t (* f)(int, void *, size_t))
547{
548 if (smbw_fd(fd)) {
549 return smbw_write(fd, buf, count);
550 }
551
552 return (* f)(fd, buf, count);
553}
554
555
556/**
557 ** Wrapper Functions
558 **/
559
560int open(__const char *name, int flags, ...)
561{
562 va_list ap;
563 mode_t mode;
564
565 va_start(ap, flags);
566 mode = va_arg(ap, mode_t);
567 va_end(ap);
568
569 check_init("open");
570
571 return openx((char *) name, flags, mode, smbw_libc.open);
572}
573
574int _open(char *name, int flags, mode_t mode)
575{
576 check_init("open");
577
578 return openx(name, flags, mode, smbw_libc._open);
579}
580
581int __open(char *name, int flags, mode_t mode)
582{
583 check_init("open");
584
585 return openx(name, flags, mode, smbw_libc.__open);
586}
587
588int open64 (__const char *name, int flags, ...)
589{
590 va_list ap;
591 mode_t mode;
592
593 va_start(ap, flags);
594 mode = va_arg(ap, mode_t);
595 va_end(ap);
596
597 check_init("open64");
598 return openx((char *) name, flags, mode, smbw_libc.open64);
599}
600
601int _open64(char *name, int flags, mode_t mode)
602{
603 check_init("_open64");
604 return openx(name, flags, mode, smbw_libc._open64);
605}
606
607int __open64(char *name, int flags, mode_t mode)
608{
609 check_init("__open64");
610 return openx(name, flags, mode, smbw_libc.__open64);
611}
612
613ssize_t pread(int fd, void *buf, size_t size, off_t ofs)
614{
615 check_init("pread");
616
617 if (smbw_fd(fd)) {
618 return smbw_pread(fd, buf, size, ofs);
619 }
620
621 return (* smbw_libc.pread)(fd, buf, size, ofs);
622}
623
624ssize_t pread64(int fd, void *buf, size_t size, off64_t ofs)
625{
626 check_init("pread64");
627
628 if (smbw_fd(fd)) {
629 return smbw_pread(fd, buf, size, (off_t) ofs);
630 }
631
632 return (* smbw_libc.pread64)(fd, buf, size, ofs);
633}
634
635ssize_t pwrite(int fd, const void *buf, size_t size, off_t ofs)
636{
637 check_init("pwrite");
638
639 if (smbw_fd(fd)) {
640 return smbw_pwrite(fd, (void *) buf, size, ofs);
641 }
642
643 return (* smbw_libc.pwrite)(fd, (void *) buf, size, ofs);
644}
645
646ssize_t pwrite64(int fd, const void *buf, size_t size, off64_t ofs)
647{
648 check_init("pwrite64");
649
650 if (smbw_fd(fd)) {
651 return smbw_pwrite(fd, (void *) buf, size, (off_t) ofs);
652 }
653
654 return (* smbw_libc.pwrite64)(fd, (void *) buf, size, ofs);
655}
656
657int chdir(const char *name)
658{
659 check_init("chdir");
660 return smbw_chdir((char *) name);;
661}
662
663int __chdir(char *name)
664{
665 check_init("__chdir");
666 return smbw_chdir(name);
667}
668
669int _chdir(char *name)
670{
671 check_init("_chdir");
672 return smbw_chdir(name);
673}
674
675int close(int fd)
676{
677 check_init("close");
678 return closex(fd, smbw_libc.close);
679}
680
681int __close(int fd)
682{
683 check_init("__close");
684 return closex(fd, smbw_libc.__close);
685}
686
687int _close(int fd)
688{
689 check_init("_close");
690 return closex(fd, smbw_libc._close);
691}
692
693int fchdir(int fd)
694{
695 check_init("fchdir");
696 return smbw_fchdir(fd);
697}
698
699int __fchdir(int fd)
700{
701 check_init("__fchdir");
702 return fchdir(fd);
703}
704
705int _fchdir(int fd)
706{
707 check_init("_fchdir");
708 return fchdir(fd);
709}
710
711int fcntl (int fd, int cmd, ...)
712{
713 va_list ap;
714 long arg;
715
716 va_start(ap, cmd);
717 arg = va_arg(ap, long);
718 va_end(ap);
719
720 check_init("fcntl");
721 return fcntlx(fd, cmd, arg, smbw_libc.fcntl);
722}
723
724int __fcntl(int fd, int cmd, ...)
725{
726 va_list ap;
727 long arg;
728
729 va_start(ap, cmd);
730 arg = va_arg(ap, long);
731 va_end(ap);
732
733 check_init("__fcntl");
734 return fcntlx(fd, cmd, arg, smbw_libc.__fcntl);
735}
736
737int _fcntl(int fd, int cmd, ...)
738{
739 va_list ap;
740 long arg;
741
742 va_start(ap, cmd);
743 arg = va_arg(ap, long);
744 va_end(ap);
745
746 check_init("_fcntl");
747 return fcntlx(fd, cmd, arg, smbw_libc._fcntl);
748}
749
750int getdents(int fd, struct dirent *dirp, unsigned int count)
751{
752 check_init("getdents");
753 return getdentsx(fd, dirp, count, smbw_libc.getdents);
754}
755
756int __getdents(int fd, struct dirent *dirp, unsigned int count)
757{
758 check_init("__getdents");
759 return getdentsx(fd, dirp, count, smbw_libc.__getdents);
760}
761
762int _getdents(int fd, struct dirent *dirp, unsigned int count)
763{
764 check_init("_getdents");
765 return getdentsx(fd, dirp, count, smbw_libc._getdents);
766}
767
768int getdents64(int fd, struct dirent64 *external, unsigned int count)
769{
770 check_init("getdents64");
771 if (smbw_fd(fd)) {
772 int i;
773 struct SMBW_dirent *internal;
774 int ret;
775 int n;
776
777 /*
778 * LIMITATION: If they pass a count which is not a multiple of
779 * the size of struct dirent, they will not get a partial
780 * structure; we ignore the excess count.
781 */
782 n = (count / sizeof(struct dirent64));
783
784 internal = malloc(sizeof(struct SMBW_dirent) * n);
785 if (internal == NULL) {
786 errno = ENOMEM;
787 return -1;
788 }
789 ret = smbw_getdents(fd, internal, count);
790 if (ret <= 0)
791 return ret;
792
793 ret = sizeof(struct dirent) * count;
794
795 for (i = 0; count; i++, count--)
796 dirent64_convert(&internal[i], &external[i]);
797
798 return ret;
799 }
800
801 return (* smbw_libc.getdents64)(fd, external, count);
802}
803
804off_t lseek(int fd, off_t offset, int whence)
805{
806 off_t ret;
807 check_init("lseek");
808 ret = lseekx(fd, offset, whence, smbw_libc.lseek);
809 if (smbw_debug)
810 {
811 printf("lseek(%d, 0x%llx) returned 0x%llx\n",
812 fd,
813 (unsigned long long) offset,
814 (unsigned long long) ret);
815 }
816 return ret;
817}
818
819off_t __lseek(int fd, off_t offset, int whence)
820{
821 off_t ret;
822 check_init("__lseek");
823 ret = lseekx(fd, offset, whence, smbw_libc.__lseek);
824 if (smbw_debug)
825 {
826 printf("__lseek(%d, 0x%llx) returned 0x%llx\n",
827 fd,
828 (unsigned long long) offset,
829 (unsigned long long) ret);
830 }
831 return ret;
832}
833
834off_t _lseek(int fd, off_t offset, int whence)
835{
836 off_t ret;
837 check_init("_lseek");
838 ret = lseekx(fd, offset, whence, smbw_libc._lseek);
839 if (smbw_debug)
840 {
841 printf("_lseek(%d, 0x%llx) returned 0x%llx\n",
842 fd,
843 (unsigned long long) offset,
844 (unsigned long long) ret);
845 }
846 return ret;
847}
848
849off64_t lseek64(int fd, off64_t offset, int whence)
850{
851 off64_t ret;
852 check_init("lseek64");
853 ret = lseek64x(fd, offset, whence, smbw_libc.lseek64);
854 if (smbw_debug)
855 {
856 printf("lseek64(%d, 0x%llx) returned 0x%llx\n",
857 fd,
858 (unsigned long long) offset,
859 (unsigned long long) ret);
860 }
861 return ret;
862}
863
864off64_t __lseek64(int fd, off64_t offset, int whence)
865{
866 check_init("__lseek64");
867 return lseek64x(fd, offset, whence, smbw_libc.__lseek64);
868}
869
870off64_t _lseek64(int fd, off64_t offset, int whence)
871{
872 off64_t ret;
873 check_init("_lseek64");
874 ret = lseek64x(fd, offset, whence, smbw_libc._lseek64);
875 if (smbw_debug)
876 {
877 printf("_lseek64(%d, 0x%llx) returned 0x%llx\n",
878 fd,
879 (unsigned long long) offset,
880 (unsigned long long) ret);
881 }
882 return ret;
883}
884
885ssize_t read(int fd, void *buf, size_t count)
886{
887 check_init("read");
888 return readx(fd, buf, count, smbw_libc.read);
889}
890
891ssize_t __read(int fd, void *buf, size_t count)
892{
893 check_init("__read");
894 return readx(fd, buf, count, smbw_libc.__read);
895}
896
897ssize_t _read(int fd, void *buf, size_t count)
898{
899 check_init("_read");
900 return readx(fd, buf, count, smbw_libc._read);
901}
902
903ssize_t write(int fd, const void *buf, size_t count)
904{
905 check_init("write");
906 return writex(fd, (void *) buf, count, smbw_libc.write);
907}
908
909ssize_t __write(int fd, const void *buf, size_t count)
910{
911 check_init("__write");
912 return writex(fd, (void *) buf, count, smbw_libc.__write);
913}
914
915ssize_t _write(int fd, const void *buf, size_t count)
916{
917 check_init("_write");
918 return writex(fd, (void *) buf, count, smbw_libc._write);
919}
920
921int access(const char *name, int mode)
922{
923 check_init("access");
924
925 if (smbw_path((char *) name)) {
926 return smbw_access((char *) name, mode);
927 }
928
929 return (* smbw_libc.access)((char *) name, mode);
930}
931
932int chmod(const char *name, mode_t mode)
933{
934 check_init("chmod");
935
936 if (smbw_path((char *) name)) {
937 return smbw_chmod((char *) name, mode);
938 }
939
940 return (* smbw_libc.chmod)((char *) name, mode);
941}
942
943int fchmod(int fd, mode_t mode)
944{
945 check_init("fchmod");
946
947 if (smbw_fd(fd)) {
948 /* Not yet implemented in libsmbclient */
949 return ENOTSUP;
950 }
951
952 return (* smbw_libc.fchmod)(fd, mode);
953}
954
955int chown(const char *name, uid_t owner, gid_t group)
956{
957 check_init("chown");
958
959 if (smbw_path((char *) name)) {
960 return smbw_chown((char *) name, owner, group);
961 }
962
963 return (* smbw_libc.chown)((char *) name, owner, group);
964}
965
966int fchown(int fd, uid_t owner, gid_t group)
967{
968 check_init("fchown");
969
970 if (smbw_fd(fd)) {
971 /* Not yet implemented in libsmbclient */
972 return ENOTSUP;
973 }
974
975 return (* smbw_libc.fchown)(fd, owner, group);
976}
977
978char *getcwd(char *buf, size_t size)
979{
980 check_init("getcwd");
981 return (char *)smbw_getcwd(buf, size);
982}
983
984int mkdir(const char *name, mode_t mode)
985{
986 check_init("mkdir");
987
988 if (smbw_path((char *) name)) {
989 return smbw_mkdir((char *) name, mode);
990 }
991
992 return (* smbw_libc.mkdir)((char *) name, mode);
993}
994
995int __fxstat(int vers, int fd, struct stat *st)
996{
997 check_init("__fxstat");
998
999 if (smbw_fd(fd)) {
1000 struct SMBW_stat statbuf;
1001 int ret = smbw_fstat(fd, &statbuf);
1002 stat_convert(&statbuf, st);
1003 return ret;
1004 }
1005
1006 return (* smbw_libc.__fxstat)(vers, fd, st);
1007}
1008
1009int __xstat(int vers, const char *name, struct stat *st)
1010{
1011 check_init("__xstat");
1012
1013 if (smbw_path((char *) name)) {
1014 struct SMBW_stat statbuf;
1015 int ret = smbw_stat((char *) name, &statbuf);
1016 stat_convert(&statbuf, st);
1017 return ret;
1018 }
1019
1020 return (* smbw_libc.__xstat)(vers, (char *) name, st);
1021}
1022
1023int __lxstat(int vers, const char *name, struct stat *st)
1024{
1025 check_init("__lxstat");
1026
1027 if (smbw_path((char *) name)) {
1028 struct SMBW_stat statbuf;
1029 int ret = smbw_stat((char *) name, &statbuf);
1030 stat_convert(&statbuf, st);
1031 return ret;
1032 }
1033
1034 return (* smbw_libc.__lxstat)(vers, (char *) name, st);
1035}
1036
1037int stat(const char *name, struct stat *st)
1038{
1039 check_init("stat");
1040
1041 if (smbw_path((char *) name)) {
1042 struct SMBW_stat statbuf;
1043 int ret = smbw_stat((char *) name, &statbuf);
1044 stat_convert(&statbuf, st);
1045 return ret;
1046 }
1047
1048 return (* smbw_libc.stat)((char *) name, st);
1049}
1050
1051int lstat(const char *name, struct stat *st)
1052{
1053 check_init("lstat");
1054
1055 if (smbw_path((char *) name)) {
1056 struct SMBW_stat statbuf;
1057 int ret = smbw_stat((char *) name, &statbuf);
1058 stat_convert(&statbuf, st);
1059 return ret;
1060 }
1061
1062 return (* smbw_libc.lstat)((char *) name, st);
1063}
1064
1065int fstat(int fd, struct stat *st)
1066{
1067 check_init("fstat");
1068
1069 if (smbw_fd(fd)) {
1070 struct SMBW_stat statbuf;
1071 int ret = smbw_fstat(fd, &statbuf);
1072 stat_convert(&statbuf, st);
1073 return ret;
1074 }
1075
1076 return (* smbw_libc.fstat)(fd, st);
1077}
1078
1079int unlink(const char *name)
1080{
1081 check_init("unlink");
1082
1083 if (smbw_path((char *) name)) {
1084 return smbw_unlink((char *) name);
1085 }
1086
1087 return (* smbw_libc.unlink)((char *) name);
1088}
1089
1090int utime(const char *name, const struct utimbuf *tvp)
1091{
1092 check_init("utime");
1093
1094 if (smbw_path(name)) {
1095 return smbw_utime(name, (struct utimbuf *) tvp);
1096 }
1097
1098 return (* smbw_libc.utime)((char *) name, (struct utimbuf *) tvp);
1099}
1100
1101int utimes(const char *name, const struct timeval *tvp)
1102{
1103 check_init("utimes");
1104
1105 if (smbw_path(name)) {
1106 return smbw_utimes(name, (struct timeval *) tvp);
1107 }
1108
1109 return (* smbw_libc.utimes)((char *) name, (struct timeval *) tvp);
1110}
1111
1112int readlink(const char *path, char *buf, size_t bufsize)
1113{
1114 check_init("readlink");
1115
1116 if (smbw_path((char *) path)) {
1117 return smbw_readlink(path, (char *) buf, bufsize);
1118 }
1119
1120 return (* smbw_libc.readlink)((char *) path, buf, bufsize);
1121}
1122
1123int rename(const char *oldname, const char *newname)
1124{
1125 int p1, p2;
1126
1127 check_init("rename");
1128
1129 p1 = smbw_path((char *) oldname);
1130 p2 = smbw_path((char *) newname);
1131 if (p1 ^ p2) {
1132 /* can't cross filesystem boundaries */
1133 errno = EXDEV;
1134 return -1;
1135 }
1136 if (p1 && p2) {
1137 return smbw_rename((char *) oldname, (char *) newname);
1138 }
1139
1140 return (* smbw_libc.rename)((char *) oldname, (char *) newname);
1141}
1142
1143int rmdir(const char *name)
1144{
1145 check_init("rmdir");
1146
1147 if (smbw_path((char *) name)) {
1148 return smbw_rmdir((char *) name);
1149 }
1150
1151 return (* smbw_libc.rmdir)((char *) name);
1152}
1153
1154int symlink(const char *topath, const char *frompath)
1155{
1156 int p1, p2;
1157
1158 check_init("symlink");
1159
1160 p1 = smbw_path((char *) topath);
1161 p2 = smbw_path((char *) frompath);
1162 if (p1 || p2) {
1163 /* can't handle symlinks */
1164 errno = EPERM;
1165 return -1;
1166 }
1167
1168 return (* smbw_libc.symlink)((char *) topath, (char *) frompath);
1169}
1170
1171int dup(int fd)
1172{
1173 check_init("dup");
1174
1175 if (smbw_fd(fd)) {
1176 return smbw_dup(fd);
1177 }
1178
1179 return (* smbw_libc.dup)(fd);
1180}
1181
1182int dup2(int oldfd, int newfd)
1183{
1184 check_init("dup2");
1185
1186 if (smbw_fd(newfd)) {
1187 (* smbw_libc.close)(newfd);
1188 }
1189
1190 if (smbw_fd(oldfd)) {
1191 return smbw_dup2(oldfd, newfd);
1192 }
1193
1194 return (* smbw_libc.dup2)(oldfd, newfd);
1195}
1196
1197
1198DIR *opendir(const char *name)
1199{
1200 check_init("opendir");
1201
1202 if (smbw_path((char *) name)) {
1203 return (void *)smbw_opendir((char *) name);
1204 }
1205
1206 return (* smbw_libc.opendir)((char *) name);
1207}
1208
1209struct dirent *readdir(DIR *dir)
1210{
1211 check_init("readdir");
1212
1213 if (smbw_dirp(dir)) {
1214 static struct dirent external;
1215 struct SMBW_dirent * internal = (void *)smbw_readdir(dir);
1216 if (internal != NULL) {
1217 dirent_convert(internal, &external);
1218 return &external;
1219 }
1220 return NULL;
1221 }
1222 return (* smbw_libc.readdir)(dir);
1223}
1224
1225int closedir(DIR *dir)
1226{
1227 check_init("closedir");
1228
1229 if (smbw_dirp(dir)) {
1230 return smbw_closedir(dir);
1231 }
1232
1233 return (* smbw_libc.closedir)(dir);
1234}
1235
1236long telldir(DIR *dir)
1237{
1238 check_init("telldir");
1239
1240 if (smbw_dirp(dir)) {
1241 return (long) smbw_telldir(dir);
1242 }
1243
1244 return (* smbw_libc.telldir)(dir);
1245}
1246
1247void seekdir(DIR *dir, long offset)
1248{
1249 check_init("seekdir");
1250
1251 if (smbw_dirp(dir)) {
1252 smbw_seekdir(dir, (long long) offset);
1253 return;
1254 }
1255
1256 (* smbw_libc.seekdir)(dir, offset);
1257}
1258
1259int creat(const char *path, mode_t mode)
1260{
1261 extern int creat_bits;
1262
1263 check_init("creat");
1264 return openx((char *) path, creat_bits, mode, smbw_libc.open);
1265}
1266
1267int creat64(const char *path, mode_t mode)
1268{
1269 extern int creat_bits;
1270
1271 check_init("creat64");
1272 return openx((char *) path, creat_bits, mode, smbw_libc.open64);
1273}
1274
1275int __xstat64 (int ver, const char *name, struct stat64 *st64)
1276{
1277 check_init("__xstat64");
1278
1279 if (smbw_path((char *) name)) {
1280 struct SMBW_stat statbuf;
1281 int ret = smbw_stat((char *) name, &statbuf);
1282 stat64_convert(&statbuf, st64);
1283 return ret;
1284 }
1285
1286 return (* smbw_libc.__xstat64)(ver, (char *) name, st64);
1287}
1288
1289int stat64(const char *name, struct stat64 *st64)
1290{
1291 check_init("stat64");
1292
1293 if (smbw_path((char *) name)) {
1294 struct SMBW_stat statbuf;
1295 int ret = smbw_stat((char *) name, &statbuf);
1296 stat64_convert(&statbuf, st64);
1297 return ret;
1298 }
1299
1300 return (* smbw_libc.stat64)((char *) name, st64);
1301}
1302
1303int __fxstat64(int ver, int fd, struct stat64 *st64)
1304{
1305 check_init("__fxstat64");
1306
1307 if (smbw_fd(fd)) {
1308 struct SMBW_stat statbuf;
1309 int ret = smbw_fstat(fd, &statbuf);
1310 stat64_convert(&statbuf, st64);
1311 return ret;
1312 }
1313
1314 return (* smbw_libc.__fxstat64)(ver, fd, st64);
1315}
1316
1317int fstat64(int fd, struct stat64 *st64)
1318{
1319 check_init("fstat64");
1320
1321 if (smbw_fd(fd)) {
1322 struct SMBW_stat statbuf;
1323 int ret = smbw_fstat(fd, &statbuf);
1324 stat64_convert(&statbuf, st64);
1325 return ret;
1326 }
1327
1328 return (* smbw_libc.fstat64)(fd, st64);
1329}
1330
1331int __lxstat64(int ver, const char *name, struct stat64 *st64)
1332{
1333 check_init("__lxstat64");
1334
1335 if (smbw_path((char *) name)) {
1336 struct SMBW_stat statbuf;
1337 int ret = smbw_stat(name, &statbuf);
1338 stat64_convert(&statbuf, st64);
1339 return ret;
1340 }
1341
1342 return (* smbw_libc.__lxstat64)(ver, (char *) name, st64);
1343}
1344
1345int lstat64(const char *name, struct stat64 *st64)
1346{
1347 check_init("lstat64");
1348
1349 if (smbw_path((char *) name)) {
1350 struct SMBW_stat statbuf;
1351 int ret = smbw_stat((char *) name, &statbuf);
1352 stat64_convert(&statbuf, st64);
1353 return ret;
1354 }
1355
1356 return (* smbw_libc.lstat64)((char *) name, st64);
1357}
1358
1359int _llseek(unsigned int fd, unsigned long offset_high, unsigned long offset_low, loff_t *result, unsigned int whence)
1360{
1361 check_init("_llseek");
1362
1363 if (smbw_fd(fd)) {
1364 *result = lseek(fd, offset_low, whence);
1365 return (*result < 0 ? -1 : 0);
1366 }
1367
1368 return (* smbw_libc._llseek)(fd, offset_high, offset_low, result, whence);
1369}
1370
1371struct dirent64 *readdir64(DIR *dir)
1372{
1373 check_init("readdir64");
1374
1375 if (smbw_dirp(dir)) {
1376 static struct dirent64 external;
1377 struct SMBW_dirent * internal = (void *)smbw_readdir(dir);
1378 if (internal != NULL) {
1379 dirent64_convert(internal, &external);
1380 return &external;
1381 }
1382 return NULL;
1383 }
1384
1385 return (* smbw_libc.readdir64)(dir);
1386}
1387
1388int readdir_r(DIR *dir, struct dirent *external, struct dirent **result)
1389{
1390 check_init("readdir_r");
1391
1392 if (smbw_dirp(dir)) {
1393 struct SMBW_dirent internal;
1394 int ret = smbw_readdir_r(dir, &internal, NULL);
1395 if (ret == 0) {
1396 dirent_convert(&internal, external);
1397 *result = external;
1398 }
1399 return ret;
1400 }
1401
1402 return (* smbw_libc.readdir_r)(dir, external, result);
1403}
1404
1405int readdir64_r(DIR *dir, struct dirent64 *external, struct dirent64 **result)
1406{
1407 check_init("readdir64_r");
1408
1409 if (smbw_dirp(dir)) {
1410 struct SMBW_dirent internal;
1411 int ret = smbw_readdir_r(dir, &internal, NULL);
1412 if (ret == 0) {
1413 dirent64_convert(&internal, external);
1414 *result = external;
1415 }
1416 return ret;
1417 }
1418
1419 return (* smbw_libc.readdir64_r)(dir, external, result);
1420}
1421
1422int fork(void)
1423{
1424 check_init("fork");
1425 return smbw_fork();
1426}
1427
1428int setxattr(const char *fname,
1429 const char *name,
1430 const void *value,
1431 size_t size,
1432 int flags)
1433{
1434 if (smbw_path(fname)) {
1435 return smbw_setxattr(fname, name, value, size, flags);
1436 }
1437
1438 return (* smbw_libc.setxattr)(fname, name, value, size, flags);
1439}
1440
1441int lsetxattr(const char *fname,
1442 const char *name,
1443 const void *value,
1444 size_t size,
1445 int flags)
1446{
1447 if (smbw_path(fname)) {
1448 return smbw_lsetxattr(fname, name, value, size, flags);
1449 }
1450
1451 return (* smbw_libc.lsetxattr)(fname, name, value, size, flags);
1452}
1453
1454int fsetxattr(int fd,
1455 const char *name,
1456 const void *value,
1457 size_t size,
1458 int flags)
1459{
1460 if (smbw_fd(fd)) {
1461 return smbw_fsetxattr(fd, name, value, size, flags);
1462 }
1463
1464 return (* smbw_libc.fsetxattr)(fd, name, value, size, flags);
1465}
1466
1467int getxattr(const char *fname,
1468 const char *name,
1469 const void *value,
1470 size_t size)
1471{
1472 if (smbw_path(fname)) {
1473 return smbw_getxattr(fname, name, value, size);
1474 }
1475
1476 return (* smbw_libc.getxattr)(fname, name, value, size);
1477}
1478
1479int lgetxattr(const char *fname,
1480 const char *name,
1481 const void *value,
1482 size_t size)
1483{
1484 if (smbw_path(fname)) {
1485 return smbw_lgetxattr(fname, name, value, size);
1486 }
1487
1488 return (* smbw_libc.lgetxattr)(fname, name, value, size);
1489}
1490
1491int fgetxattr(int fd,
1492 const char *name,
1493 const void *value,
1494 size_t size)
1495{
1496 if (smbw_fd(fd)) {
1497 return smbw_fgetxattr(fd, name, value, size);
1498 }
1499
1500 return (* smbw_libc.fgetxattr)(fd, name, value, size);
1501}
1502
1503int removexattr(const char *fname,
1504 const char *name)
1505{
1506 if (smbw_path(fname)) {
1507 return smbw_removexattr(fname, name);
1508 }
1509
1510 return (* smbw_libc.removexattr)(fname, name);
1511}
1512
1513int lremovexattr(const char *fname,
1514 const char *name)
1515{
1516 if (smbw_path(fname)) {
1517 return smbw_lremovexattr(fname, name);
1518 }
1519
1520 return (* smbw_libc.lremovexattr)(fname, name);
1521}
1522
1523int fremovexattr(int fd,
1524 const char *name)
1525{
1526 if (smbw_fd(fd)) {
1527 return smbw_fremovexattr(fd, name);
1528 }
1529
1530 return (* smbw_libc.fremovexattr)(fd, name);
1531}
1532
1533int listxattr(const char *fname,
1534 char *list,
1535 size_t size)
1536{
1537 if (smbw_path(fname)) {
1538 return smbw_listxattr(fname, list, size);
1539 }
1540
1541 return (* smbw_libc.listxattr)(fname, list, size);
1542}
1543
1544int llistxattr(const char *fname,
1545 char *list,
1546 size_t size)
1547{
1548 if (smbw_path(fname)) {
1549 return smbw_llistxattr(fname, list, size);
1550 }
1551
1552 return (* smbw_libc.llistxattr)(fname, list, size);
1553}
1554
1555int flistxattr(int fd,
1556 char *list,
1557 size_t size)
1558{
1559 if (smbw_fd(fd)) {
1560 return smbw_flistxattr(fd, list, size);
1561 }
1562
1563 return (* smbw_libc.flistxattr)(fd, list, size);
1564}
1565
1566
1567/*
1568 * We're ending up with a different implementation of malloc() with smbwrapper
1569 * than without it. The one with it does not support returning a non-NULL
1570 * pointer from a call to malloc(0), and many apps depend on getting a valid
1571 * pointer when requesting zero length (e.g. df, emacs).
1572 *
1573 * Unfortunately, initializing the smbw_libc[] array via the dynamic link
1574 * library (libdl) requires malloc so we can't just do the same type of
1575 * mapping to the C library as we do with everything else. We need to
1576 * implement a different way of allocating memory that ensures that the C
1577 * library version of malloc() gets used. This is the only place where we
1578 * kludge the code to use an undocumented interface to the C library.
1579 *
1580 * If anyone can come up with a way to dynamically link to the C library
1581 * rather than using this undocumented interface, I'd sure love to hear about
1582 * it. Better yet, if you can figure out where the alternate malloc()
1583 * functions are coming from and arrange for them not to be called, that would
1584 * be even better. We should try to avoid wrapping functions that don't
1585 * really require it.
1586 */
1587
1588void *malloc(size_t size)
1589{
1590 void *__libc_malloc(size_t size);
1591 return __libc_malloc(size);
1592}
1593
1594void *calloc(size_t nmemb, size_t size)
1595{
1596 void *__libc_calloc(size_t nmemb, size_t size);
1597 return __libc_calloc(nmemb, size);
1598}
1599
1600void *realloc(void *ptr, size_t size)
1601{
1602 void *__libc_realloc(void *ptr, size_t size);
1603 return __libc_realloc(ptr, size);
1604}
1605
1606void free(void *ptr)
1607{
1608 static int in_progress = 0;
1609 void __libc_free(void *ptr);
1610
1611 if (in_progress) return;
1612 in_progress = 1;
1613 __libc_free(ptr);
1614 in_progress = 0;
1615}
1616
1617
1618#if 0 /* SELECT */
1619
1620static struct sigaction user_action[_NSIG];
1621
1622static void
1623smbw_sigaction_handler(int signum,
1624 siginfo_t *info,
1625 void *context)
1626{
1627 /* Our entire purpose for trapping signals is to call this! */
1628 sys_select_signal();
1629
1630 /* Call the user's handler */
1631 if (user_action[signum].sa_handler != SIG_IGN &&
1632 user_action[signum].sa_handler != SIG_DFL &&
1633 user_action[signum].sa_handler != SIG_ERR) {
1634 (* user_action[signum].sa_sigaction)(signum, info, context);
1635 }
1636}
1637
1638
1639/*
1640 * Every Samba signal handler must call sys_select_signal() to avoid a race
1641 * condition, so we'll take whatever signal handler is currently assigned,
1642 * call call sys_select_signal() in addition to their call.
1643 */
1644static int
1645do_select(int n,
1646 fd_set *readfds,
1647 fd_set *writefds,
1648 fd_set *exceptfds,
1649 struct timeval *timeout,
1650 int (* select_fn)(int n,
1651 fd_set *readfds,
1652 fd_set *writefds,
1653 fd_set *exceptfds,
1654 struct timeval *timeout))
1655{
1656 int i;
1657 int ret;
1658 int saved_errno;
1659 sigset_t sigset;
1660 struct sigaction new_action;
1661
1662 saved_errno = errno;
1663 for (i=1; i<_NSIG; i++) {
1664 sigemptyset(&sigset);
1665 new_action.sa_mask = sigset;
1666 new_action.sa_flags = SA_SIGINFO;
1667 new_action.sa_sigaction = smbw_sigaction_handler;
1668
1669 if (sigaction(i, &new_action, &user_action[i]) < 0) {
1670 if (errno != EINVAL) {
1671 return -1;
1672 }
1673 }
1674 }
1675 errno = saved_errno;
1676
1677 ret = (* select_fn)(n, readfds, writefds, exceptfds, timeout);
1678 saved_errno = errno;
1679
1680 for (i=0; i<_NSIG; i++) {
1681 (void) sigaction(i, &user_action[i], NULL);
1682 }
1683
1684 errno = saved_errno;
1685 return ret;
1686}
1687
1688int
1689select(int n,
1690 fd_set *readfds,
1691 fd_set *writefds,
1692 fd_set *exceptfds,
1693 struct timeval *timeout)
1694{
1695 check_init("select");
1696
1697 return do_select(n, readfds, writefds, exceptfds,
1698 timeout, smbw_libc.select);
1699}
1700
1701int
1702_select(int n,
1703 fd_set *readfds,
1704 fd_set *writefds,
1705 fd_set *exceptfds,
1706 struct timeval *timeout)
1707{
1708 check_init("_select");
1709
1710 return do_select(n, readfds, writefds, exceptfds,
1711 timeout, smbw_libc._select);
1712}
1713
1714int
1715__select(int n,
1716 fd_set *readfds,
1717 fd_set *writefds,
1718 fd_set *exceptfds,
1719 struct timeval *timeout)
1720{
1721 check_init("__select");
1722
1723 return do_select(n, readfds, writefds, exceptfds,
1724 timeout, smbw_libc.__select);
1725}
1726
1727#endif
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