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Annotation of embedaddon/pimd/libite/fexist.c, revision 1.1.1.1

1.1       misho       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: 
                     24: #include <errno.h>
                     25: #include <unistd.h>
                     26: 
                     27: /**
                     28:  * fexist - Check if a file exists in the file system.
                     29:  * @file: File to look for, with full path.
                     30:  *
                     31:  * Returns:
                     32:  * %TRUE(1) if the file exists, otherwise %FALSE(0).
                     33:  */
                     34: int fexist(char *file)
                     35: {
                     36:        if (!file) {
                     37:                errno = EINVAL;
                     38:                return 0;       /* Doesn't exist ... */
                     39:        }
                     40: 
                     41:        if (-1 == access(file, F_OK))
                     42:                return 0;
                     43: 
                     44:        return 1;
                     45: }
                     46: 
                     47: #ifdef UNITTEST
                     48: #include "lite.h"
                     49: 
                     50: int main(void)
                     51: {
                     52:        int i = 0;
                     53:        struct { char *file; int exist; } arr[] = {
                     54:                { "/etc/passwd", 1 },
                     55:                { "/etc/kalle",  0 },
                     56:                { "/sbin/init",  1 },
                     57:                { "/dev/null",   1 },
                     58:                { NULL,  0 },
                     59:        };
                     60:        FILE *src, *dst;
                     61: 
                     62:        for (i = 0; i < NELEMS(arr); i++) {
                     63:                if (fexist(arr[i].file) != arr[i].exist)
                     64:                        err(1, "Failed fexist(%s)", arr[i].file ?: "NULL");
                     65:                else
                     66:                        printf("File %-11s %-14s => OK!\n", arr[i].file ?: "NULL",
                     67:                               arr[i].exist ? "does exist" : "does not exist");
                     68:        }
                     69: 
                     70:        return 0;
                     71: }
                     72: #endif /* UNITTEST */
                     73: 
                     74: /**
                     75:  * Local Variables:
                     76:  *  compile-command: "make V=1 -f fexist.mk"
                     77:  *  version-control: t
                     78:  *  indent-tabs-mode: t
                     79:  *  c-file-style: "linux"
                     80:  * End:
                     81:  */