/* WARNING: This file was generated by dkct. Changes you make here will be lost if dkct is run again! You should modify the original source and run dkct on it. Original source: dk4fopc8.ctr */ /* Copyright (C) 2015-2017, Dirk Krause Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above opyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the author nor the names of contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @file dk4fopc8.c The dk4fopc8 module. */ #line 111 "dk4fopc8.ctr" #include "dk4conf.h" #if DK4_ON_WINDOWS #ifndef WINDOWS_H_INCLUDED #include #define WINDOWS_H_INCLUDED 1 #endif #endif #include "dk4fopc8.h" #ifndef DK4STAT8_H_INCLUDED #include "dk4stat8.h" #endif #ifndef DK4STAT_H_INCLUDED #include "dk4stat.h" #endif #ifndef DK4MPL_H_INCLUDED #include "dk4mpl.h" #endif #ifndef DK4STR8_H_INCLUDED #include "dk4str8.h" #endif #if DK4_HAVE_SYS_TYPES_H #ifndef SYS_TYPES_H_INCLUDED #include #define SYS_TYPES_H_INCLUDED 1 #endif #endif #if DK4_HAVE_UNISTD_H #ifndef UNISTD_H_INCLUDED #include #define UNISTD_H_INCLUDED 1 #endif #endif #if DK4_HAVE_ERRNO_H #ifndef ERRNO_H_INCLUDED #include #define ERRNO_H_INCLUDED 1 #endif #endif #line 163 "dk4fopc8.ctr" #if !DK4_ON_WINDOWS #if DK4_HAVE_BACKSLASH_AS_SEP /** Path component separator. */ static const unsigned char sep = '\\'; #else /** Path component separator. */ static const unsigned char sep = '/'; #endif /** Check whether one of the components in the path is a symbolic link. @param name Path name to check. @return 1 if there is no symlink in the path, 0 otherwise. */ static int dk4fopen_check_no_symlink_in_path(const char *name) { char buf[DK4_MAX_PATH]; dk4_stat_t lstb; char *p1; int back = 0; if (sizeof(buf) > dk4str8_len(name)) { back = 1; dk4str8_cpy_s(buf, sizeof(buf), name, NULL); p1 = dk4str8_chr(buf, sep); while ((NULL != p1) && (1 == back)) { *p1 = '\0'; if (0 < dk4str8_len(buf)) { if (0 != dk4stat_l_c8(&lstb, buf, NULL)) { if (0 != dk4stat_is_symlink(&lstb, NULL)) { back = 0; } } } *(p1++) = sep; p1 = dk4str8_chr(p1, sep); } } return back; } #endif int dk4fopen_check_c8(const char *name, int ww, int tests, dk4_er_t *erp) { #if DK4_ON_WINDOWS WIN32_FIND_DATAA ffdata; HANDLE ha; DWORD dwattr; int back = 1; #line 219 "dk4fopc8.ctr" /* Check name */ if (NULL == name) { #line 222 "dk4fopc8.ctr" dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS); back = 0; goto finished; } /* Retrieve attributes. */ dwattr = GetFileAttributesA(name); if (INVALID_FILE_ATTRIBUTES == dwattr) { ha = FindFirstFileA(name, &ffdata); if (INVALID_HANDLE_VALUE != ha) { dwattr = ffdata.dwFileAttributes; FindClose(ha); } } if (INVALID_FILE_ATTRIBUTES == dwattr) { #line 237 "dk4fopc8.ctr" goto finished; } /* Check directory */ if ((DWORD)0UL != (FILE_ATTRIBUTE_DIRECTORY & dwattr)) { #line 242 "dk4fopc8.ctr" back = 0; dk4error_set_simple_error_code(erp, DK4_E_SYNTAX); goto finished; } /* Check device */ if ((DWORD)0UL != (FILE_ATTRIBUTE_DEVICE & dwattr)) { #line 249 "dk4fopc8.ctr" back = 0; dk4error_set_idetails(erp, DK4_E_SEC_CHECK, DK4_FOPEN_SC_IS_REGULAR); } finished: #line 254 "dk4fopc8.ctr" return back; #else dk4_stat_t stb; dk4_stat_t lstb; int back = 1; #line 260 "dk4fopc8.ctr" /* Check name argument. */ if (NULL == name) { dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS); back = 0; goto finished; } /* Check existing path. */ if (0 == dk4stat_c8(&stb, name, NULL)) { #line 272 "dk4fopc8.ctr" goto finished; } /* Check directory. */ if (0 != dk4stat_is_directory(&stb, NULL)) { #line 278 "dk4fopc8.ctr" dk4error_set_simple_error_code(erp, DK4_E_SYNTAX); back = 0; goto finished; } /* Write regular files only. */ if ((0 != ww) && (0 != (tests & DK4_FOPEN_SC_IS_REGULAR))) { if (0 == dk4stat_is_regular(&stb, NULL)) { #line 287 "dk4fopc8.ctr" dk4error_set_idetails(erp, DK4_E_SEC_CHECK, DK4_FOPEN_SC_IS_REGULAR); back = 0; goto finished; } } /* Do not write if any path element is a symbolic link. */ if ((0 != ww) && (0 != (tests & DK4_FOPEN_SC_WR_SYMLINK_IN_PATH))) { if (0 == dk4fopen_check_no_symlink_in_path(name)) { #line 297 "dk4fopc8.ctr" dk4error_set_idetails(erp, DK4_E_SEC_CHECK, DK4_FOPEN_SC_WR_SYMLINK_IN_PATH); back = 0; goto finished; } } /* Obtain symbolic link information. */ if (0 == dk4stat_l_c8(&lstb, name, NULL)) { #line 306 "dk4fopc8.ctr" goto finished; } /* Do not write to file via link. */ if ((0 != ww) && (0 != (tests & DK4_FOPEN_SC_WR_PATH_IS_SYMLINK))) { if (0 != dk4stat_is_symlink(&lstb, NULL)) { #line 313 "dk4fopc8.ctr" dk4error_set_idetails(erp, DK4_E_SEC_CHECK, DK4_FOPEN_SC_WR_PATH_IS_SYMLINK); back = 0; goto finished; } } /* Do not write file via link if file owner differs from link owner. */ #if DK4_HAVE_FILE_UIDGID if ((0 != ww) && (0 != (tests & DK4_FOPEN_SC_WR_SYMLINK_OWNER))) { if (lstb.st_uid != stb.st_uid) { #line 324 "dk4fopc8.ctr" dk4error_set_idetails(erp, DK4_E_SEC_CHECK, DK4_FOPEN_SC_WR_SYMLINK_OWNER); back = 0; goto finished; } } #endif finished: #line 332 "dk4fopc8.ctr" return back; #endif } FILE * dk4fopen_c8(const char *name, const char *mode, int tests, dk4_er_t *erp) { FILE *back = NULL; /* Result */ const char *cptr; /* Traverse mode */ int ww = 0; /* Flag: Want to write */ #if DK4_HAVE_FOPEN_S errno_t errn; #endif if ((NULL != name) && (NULL != mode)) { cptr = mode; while (*cptr) { switch (*cptr) { case 'w': case 'a': case '+': { ww = 1; } break; } cptr++; } if (0 != dk4fopen_check_c8(name, ww, tests, erp)) { #if DK4_HAVE_FOPEN_S errn = fopen_s(&back, name, mode); if (0 != errn) { back = NULL; dk4error_set_idetails( erp, ((ww) ? DK4_E_OPEN_WRITE_FAILED : DK4_E_OPEN_READ_FAILED), errn ); } #else #if DK4_HAVE_FOPEN64 errno = 0; back = fopen64(name, mode); if (NULL == back) { dk4error_set_idetails( erp, ((ww) ? DK4_E_OPEN_WRITE_FAILED : DK4_E_OPEN_READ_FAILED), errno ); } #else errno = 0; back = fopen(name, mode); if (NULL == back) { dk4error_set_idetails( erp, ((ww) ? DK4_E_OPEN_WRITE_FAILED : DK4_E_OPEN_READ_FAILED), errno ); } #endif #endif } } else { dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS); } return back; }