2 * Copyright (c) 1997 Shigio Yamaguchi. All rights reserved.
3 * Copyright (c) 1999 Tama Communications Corporation. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include "pathconv.h" /* prototypes */
33 * rel2abs: convert an relative path name into absolute.
35 * i) path relative path
36 * i) base base directory (must be absolute path)
37 * o) result result buffer
38 * i) size size of result buffer
39 * r) != NULL: absolute path
43 rel2abs(const char *path, const char *base, char *result, const size_t size)
47 * endp points the last position which is safe in the result buffer.
49 const char *endp = result + size - 1;
54 if (strlen(path) >= size)
58 } else if (*base != '/' || !size) {
64 length = strlen(base);
66 if (!strcmp(path, ".") || !strcmp(path, "./")) {
71 * rp points the last char.
73 rp = result + length - 1;
75 * remove the last '/'.
82 /* rp point NULL char */
85 * Append '/' to the tail of path name.
100 for (pp = path; *pp && *pp == '.'; ) {
101 if (!strncmp(pp, "../", 3)) {
103 while (bp > base && *--bp != '/')
105 } else if (!strncmp(pp, "./", 2)) {
107 } else if (!strncmp(pp, "..\0", 3)) {
109 while (bp > base && *--bp != '/')
120 strncpy(result, base, length);
121 rp = result + length;
122 if (*pp || *(pp - 1) == '/' || length == 0)
124 if (rp + strlen(pp) > endp)