pacemaker  2.0.2-debe490
Scalable High-Availability cluster resource manager
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compat.c
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1 /*
2  * Copyright (C) 2015 Andrew Beekhof <andrew@beekhof.net>
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #ifndef _GNU_SOURCE
20 # define _GNU_SOURCE
21 #endif
22 
23 #include <crm_internal.h>
24 #include <stdio.h>
25 #include <unistd.h>
26 #include <limits.h>
27 #include <stdlib.h>
28 #include <errno.h>
29 
39 char *
40 crm_compat_realpath(const char *path)
41 {
42 #if _POSIX_VERSION >= 200809L
43  /* Recent C libraries can dynamically allocate memory as needed */
44  return realpath(path, NULL);
45 
46 #elif defined(PATH_MAX)
47  /* Older implementations require pre-allocated memory */
48  /* (this is less desirable because PATH_MAX may be huge or not defined) */
49  char *canonicalized = malloc(PATH_MAX);
50  if ((canonicalized == NULL) || (realpath(path, canonicalized) == NULL)) {
51  return NULL;
52  }
53  return canonicalized;
54 #else
55  errno = ENOTSUP;
56  return NULL;
57 #endif
58 }
char * crm_compat_realpath(const char *path)
Definition: compat.c:40