1 /* fstat() replacement. 2 Copyright (C) 2011-2012 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 16 17 /* If the user's config.h happens to include <sys/stat.h>, let it include only 18 the system's <sys/stat.h> here, so that orig_fstat doesn't recurse to 19 rpl_fstat. */ 20 #define __need_system_sys_stat_h 21 #include <config.h> 22 23 /* Get the original definition of fstat. It might be defined as a macro. */ 24 #include <sys/types.h> 25 #include <sys/stat.h> 26 #if _GL_WINDOWS_64_BIT_ST_SIZE 27 # undef stat /* avoid warning on mingw64 with _FILE_OFFSET_BITS=64 */ 28 # define stat _stati64 29 # undef fstat /* avoid warning on mingw64 with _FILE_OFFSET_BITS=64 */ 30 # define fstat _fstati64 31 #endif 32 #undef __need_system_sys_stat_h 33 34 static int 35 orig_fstat (int fd, struct stat *buf) 36 { 37 return fstat (fd, buf); 38 } 39 40 /* Specification. */ 41 /* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc 42 eliminates this include because of the preliminary #include <sys/stat.h> 43 above. */ 44 #include "sys/stat.h" 45 46 #include <errno.h> 47 #include <unistd.h> 48 49 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER 50 # include "msvc-inval.h" 51 #endif 52 53 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER 54 static int 55 fstat_nothrow (int fd, struct stat *buf) 56 { 57 int result; 58 59 TRY_MSVC_INVAL 60 { 61 result = orig_fstat (fd, buf); 62 } 63 CATCH_MSVC_INVAL 64 { 65 result = -1; 66 errno = EBADF; 67 } 68 DONE_MSVC_INVAL; 69 70 return result; 71 } 72 #else 73 # define fstat_nothrow orig_fstat 74 #endif 75 76 int 77 rpl_fstat (int fd, struct stat *buf) 78 { 79 #if REPLACE_FCHDIR && REPLACE_OPEN_DIRECTORY 80 /* Handle the case when rpl_open() used a dummy file descriptor to work 81 around an open() that can't normally visit directories. */ 82 const char *name = _gl_directory_name (fd); 83 if (name != NULL) 84 return stat (name, buf); 85 #endif 86 87 return fstat_nothrow (fd, buf); 88 } 89
