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https://github.com/troglobit/libite.git
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97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/* Check if file exists
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*
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* Copyright (c) 2008 Claudio Matsuoka <http://helllabs.org/finit/>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/**
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* @file fexist.c
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* @author Claudio Matsuoka
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* @date 2008
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* @copyright MIT License
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "lite.h"
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/**
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* Check if a file exists in the file system.
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* @param file File to look for, with full path.
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*
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* @returns @c TRUE(1) if the @a file exists, otherwise @c FALSE(0).
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*/
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int fexist(const char *file)
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{
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if (!file) {
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errno = EINVAL;
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return 0; /* Doesn't exist ... */
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}
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if (-1 == access(file, F_OK))
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return 0;
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return 1;
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}
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/**
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* Like fexist() but with formatted string support
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* @param fmt Formatted string to be composed into the file to look for.
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*
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* This is a wrapper for the fexist() function in lite.h, lessening the
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* burden of having to compose the filename from parts in a seprate
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* buffer.
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*
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* @returns @c TRUE(1) if the @a file exists, otherwise @c FALSE(0).
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*/
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int fexistf(const char *fmt, ...)
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{
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va_list ap;
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char *file;
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int len;
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va_start(ap, fmt);
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len = vsnprintf(NULL, 0, fmt, ap);
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va_end(ap);
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file = alloca(len + 1);
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if (!file) {
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errno = ENOMEM;
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return -1;
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}
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va_start(ap, fmt);
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vsnprintf(file, len + 1, fmt, ap);
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va_end(ap);
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return fexist(file);
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}
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/**
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* Local Variables:
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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