| /* Create a file. |
| Copyright (C) 2007-2020 Free Software Foundation, Inc. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| /* If the user's config.h happens to include <fcntl.h>, let it include only |
| the system's <fcntl.h> here, so that orig_creat doesn't recurse to |
| rpl_creat. */ |
| #define __need_system_fcntl_h |
| #include <config.h> |
| |
| /* Get the original definition of creat. It might be defined as a macro. */ |
| #include <fcntl.h> |
| #include <sys/types.h> |
| #undef __need_system_fcntl_h |
| |
| static int |
| orig_creat (const char *filename, mode_t mode) |
| { |
| return creat (filename, mode); |
| } |
| |
| /* Specification. */ |
| /* Write "fcntl.h" here, not <fcntl.h>, otherwise OSF/1 5.1 DTK cc eliminates |
| this include because of the preliminary #include <fcntl.h> above. */ |
| #include "fcntl.h" |
| |
| #include <errno.h> |
| #include <string.h> |
| #include <sys/types.h> |
| |
| int |
| creat (const char *filename, mode_t mode) |
| { |
| #if OPEN_TRAILING_SLASH_BUG |
| /* Fail if the filename ends in a slash, |
| as POSIX says such a filename must name a directory |
| <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13>: |
| "A pathname that contains at least one non-<slash> character and that |
| ends with one or more trailing <slash> characters shall not be resolved |
| successfully unless the last pathname component before the trailing |
| <slash> characters names an existing directory" |
| creat() is defined as being equivalent to open() with flags |
| O_CREAT | O_TRUNC | O_WRONLY. Therefore: |
| If the named file already exists as a directory, then creat() must fail |
| with errno = EISDIR. |
| If the named file does not exist or does not name a directory, then |
| creat() must fail since creat() cannot create directories. */ |
| { |
| size_t len = strlen (filename); |
| if (len > 0 && filename[len - 1] == '/') |
| { |
| errno = EISDIR; |
| return -1; |
| } |
| } |
| #endif |
| |
| #if defined _WIN32 && !defined __CYGWIN__ |
| /* Remap the 'x' bits to the 'r' bits. */ |
| mode = (mode & ~0111) | ((mode & 0111) << 2); |
| #endif |
| |
| return orig_creat (filename, mode); |
| } |