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/* Check if file exists
*
* Copyright (c) 2008 Claudio Matsuoka <http://helllabs.org/finit/>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <errno.h>
#include <unistd.h>
/**
* fexist - Check if a file exists in the file system.
* @file: File to look for, with full path.
*
* Returns:
* %TRUE(1) if the file exists, otherwise %FALSE(0).
*/
int fexist(char *file)
{
if (!file) {
errno = EINVAL;
return 0; /* Doesn't exist ... */
}
if (-1 == access(file, F_OK))
return 0;
return 1;
}
#ifdef UNITTEST
#include "lite.h"
int main(void)
{
int i = 0;
struct { char *file; int exist; } arr[] = {
{ "/etc/passwd", 1 },
{ "/etc/kalle", 0 },
{ "/sbin/init", 1 },
{ "/dev/null", 1 },
{ NULL, 0 },
};
FILE *src, *dst;
for (i = 0; i < NELEMS(arr); i++) {
if (fexist(arr[i].file) != arr[i].exist)
err(1, "Failed fexist(%s)", arr[i].file ?: "NULL");
else
printf("File %-11s %-14s => OK!\n", arr[i].file ?: "NULL",
arr[i].exist ? "does exist" : "does not exist");
}
return 0;
}
#endif /* UNITTEST */
/**
* Local Variables:
* compile-command: "make V=1 -f fexist.mk"
* version-control: t
* indent-tabs-mode: t
* c-file-style: "linux"
* End:
*/
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