libite 2.6.1
fexist.c
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1/* Check if file exists
2 *
3 * Copyright (c) 2008 Claudio Matsuoka <http://helllabs.org/finit/>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21 * THE SOFTWARE.
22 */
23
30
31#include <errno.h>
32#include <stdio.h>
33#include <stdarg.h>
34#include <stdlib.h>
35#include <unistd.h>
36
37#include "lite.h"
38
45int fexist(const char *file)
46{
47 if (!file) {
48 errno = EINVAL;
49 return 0; /* Doesn't exist ... */
50 }
51
52 if (-1 == access(file, F_OK))
53 return 0;
54
55 return 1;
56}
57
68int fexistf(const char *fmt, ...)
69{
70 va_list ap;
71 char *file;
72 int len;
73
74 va_start(ap, fmt);
75 len = vsnprintf(NULL, 0, fmt, ap);
76 va_end(ap);
77
78 file = alloca(len + 1);
79 if (!file) {
80 errno = ENOMEM;
81 return -1;
82 }
83
84 va_start(ap, fmt);
85 vsnprintf(file, len + 1, fmt, ap);
86 va_end(ap);
87
88 return fexist(file);
89}
90
int fexistf(const char *fmt,...)
Definition fexist.c:68
int fexist(const char *file)
Definition fexist.c:45