1 /*
2 * Copyright (c) 1989, 1991, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: src/lib/libc/gen/getcwd.c,v 1.18 1999/09/28 13:24:13 marcel Exp $
30 *
31 * @(#)getcwd.c 8.5 (Berkeley) 2/7/95
32 */
33
34 #include <sys/param.h>
35 #include <errno.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <unistd.h>
39
40 int __getcwd(char *pt, size_t size);
41
42 char *
getcwd(char * pt,size_t size)43 getcwd(char *pt, size_t size)
44 {
45 int allocated = 0, ret;
46
47 /*
48 * If no buffer specified by the user, allocate one as necessary.
49 */
50 if (pt == NULL) {
51 size = MAXPATHLEN;
52 if ((pt = malloc(MAXPATHLEN)) == NULL)
53 return(NULL);
54 allocated = 1;
55 }
56 ret = __getcwd(pt, size);
57 if (ret == 0)
58 return (pt);
59 if (allocated)
60 free(pt);
61 return (NULL);
62 }
63
64 char *
getwd(char * buf)65 getwd(char *buf)
66 {
67 char *p;
68
69 if ((p = getcwd(buf, MAXPATHLEN)) != NULL)
70 return(p);
71 strcpy(buf, strerror(errno));
72 return(NULL);
73 }
74