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Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
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libc/calls/fileexists.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ 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; version 2 of the License. │
│ │
│ 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, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/struct/stat.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/nt/files.h"
#include "libc/str/str.h"
#include "libc/sysv/errfuns.h"
/**
* Returns true if file exists at path.
*
* Please note that things which aren't strictly files, e.g. directories
* or sockets, could be considered files for the purposes of this
* function. The stat() function may be used to differentiate them.
*/
bool fileexists(const char *path) {
/* TODO(jart): Use fast path on NT? */
struct stat st;
int olderr = errno;
int rc = stat(path, &st);
if (rc == -1 && (errno == ENOENT || errno == ENOTDIR)) {
errno = olderr;
}
return rc != -1;
}