Contents of /trunk/mkinitrd-magellan/busybox/libbb/simplify_path.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 1002 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * bb_simplify_path implementation for busybox |
4 | * |
5 | * Copyright (C) 2001 Manuel Novoa III <mjn3@codepoet.org> |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
8 | */ |
9 | |
10 | #include "libbb.h" |
11 | |
12 | char *bb_simplify_path(const char *path) |
13 | { |
14 | char *s, *start, *p; |
15 | |
16 | if (path[0] == '/') |
17 | start = xstrdup(path); |
18 | else { |
19 | s = xgetcwd(NULL); |
20 | start = concat_path_file(s, path); |
21 | free(s); |
22 | } |
23 | p = s = start; |
24 | |
25 | do { |
26 | if (*p == '/') { |
27 | if (*s == '/') { /* skip duplicate (or initial) slash */ |
28 | continue; |
29 | } else if (*s == '.') { |
30 | if (s[1] == '/' || s[1] == 0) { /* remove extra '.' */ |
31 | continue; |
32 | } else if ((s[1] == '.') && (s[2] == '/' || s[2] == 0)) { |
33 | ++s; |
34 | if (p > start) { |
35 | while (*--p != '/'); /* omit previous dir */ |
36 | } |
37 | continue; |
38 | } |
39 | } |
40 | } |
41 | *++p = *s; |
42 | } while (*++s); |
43 | |
44 | if ((p == start) || (*p != '/')) { /* not a trailing slash */ |
45 | ++p; /* so keep last character */ |
46 | } |
47 | *p = 0; |
48 | |
49 | return start; |
50 | } |