2 * mono-path.c: Routines for handling path names.
5 * Gonzalo Paniagua Javier (gonzalo@novell.com)
6 * Miguel de Icaza (miguel@novell.com)
8 * (C) 2006 Novell, Inc. http://www.novell.com
19 /* This is only needed for the mono_path_canonicalize code, MAXSYMLINKS, could be moved */
20 #ifdef HAVE_SYS_PARAM_H
21 #include <sys/param.h>
24 #include "mono-path.h"
26 /* Embedded systems lack MAXSYMLINKS */
31 /* Resolves '..' and '.' references in a path. If the path provided is relative,
32 * it will be relative to the current directory */
34 /* For Native Client, the above is not true. Since there is no getcwd we fill */
35 /* in the file being passed in relative to '.' and don't resolve it */
37 /* There are a couple of tests for this method in mono/test/mono-path.cs */
39 mono_path_canonicalize (const char *path)
41 gchar *abspath, *pos, *lastpos, *dest;
44 if (g_path_is_absolute (path)) {
45 abspath = g_strdup (path);
47 #ifdef __native_client__
49 abspath = g_build_filename (tmpdir, path, NULL);
51 gchar *tmpdir = g_get_current_dir ();
52 abspath = g_build_filename (tmpdir, path, NULL);
58 g_strdelimit (abspath, "/", '\\');
60 abspath = g_strreverse (abspath);
63 dest = lastpos = abspath;
64 pos = strchr (lastpos, G_DIR_SEPARATOR);
67 int len = pos - lastpos;
68 if (len == 1 && lastpos [0] == '.') {
70 } else if (len == 2 && lastpos [0] == '.' && lastpos [1] == '.') {
77 /* The two strings can overlap */
78 memmove (dest, lastpos, len + 1);
83 pos = strchr (lastpos, G_DIR_SEPARATOR);
87 /* Avoid removing the first '\' for UNC paths. We must make sure that it's indeed an UNC path
88 by checking if the \\ pair happens exactly at the end of the string.
90 if (*(lastpos-1) == G_DIR_SEPARATOR && *(lastpos-2) == G_DIR_SEPARATOR && *lastpos == 0)
94 if (dest != lastpos) strcpy (dest, lastpos);
96 g_strreverse (abspath);
98 /* We strip away all trailing dir separators. This is not correct for the root directory,
99 * since we'll return an empty string, so re-append a dir separator if there is none in the
101 if (strchr (abspath, G_DIR_SEPARATOR) == NULL) {
102 int len = strlen (abspath);
103 abspath = g_realloc (abspath, len + 2);
104 abspath [len] = G_DIR_SEPARATOR;
112 * This ensures that the path that we store points to the final file
113 * not a path to a symlink.
115 #if !defined(PLATFORM_NO_SYMLINKS)
117 resolve_symlink (const char *path)
119 char *p, *concat, *dir;
120 char buffer [PATH_MAX+1];
121 int n, iterations = 0;
126 n = readlink (p, buffer, sizeof (buffer)-1);
129 p = mono_path_canonicalize (copy);
135 if (!g_path_is_absolute (buffer)) {
136 dir = g_path_get_dirname (p);
137 concat = g_build_filename (dir, buffer, NULL);
140 concat = g_strdup (buffer);
143 p = mono_path_canonicalize (concat);
145 } while (iterations < MAXSYMLINKS);
152 mono_path_resolve_symlinks (const char *path)
154 #if defined(PLATFORM_NO_SYMLINKS)
155 return mono_path_canonicalize (path);
157 gchar **split = g_strsplit (path, G_DIR_SEPARATOR_S, -1);
158 gchar *p = g_strdup ("");
161 for (i = 0; split [i] != NULL; i++) {
164 // resolve_symlink of "" goes into canonicalize which resolves to cwd
165 if (strcmp (split [i], "") != 0) {
166 tmp = g_strdup_printf ("%s%s", p, split [i]);
168 p = resolve_symlink (tmp);
172 if (split [i+1] != NULL) {
173 tmp = g_strdup_printf ("%s%s", p, G_DIR_SEPARATOR_S);