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/* Create a file.
Copyright (C) 2007-2023 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser 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)
{
#if defined _WIN32 && !defined __CYGWIN__
return _creat (filename, mode);
#else
return creat (filename, mode);
#endif
}
/* 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);
}
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