|
@@ -1694,6 +1694,39 @@ get_parent_directory(char *fname)
|
|
|
return -1;
|
|
|
}
|
|
|
|
|
|
+#ifndef _WIN32
|
|
|
+/** Return a newly allocated string containing the output of getcwd(). Return
|
|
|
+ * NULL on failure. (We can't just use getcwd() into a PATH_MAX buffer, since
|
|
|
+ * Hurd hasn't got a PATH_MAX.)
|
|
|
+ */
|
|
|
+static char *
|
|
|
+alloc_getcwd(void)
|
|
|
+{
|
|
|
+ int saved_errno = errno;
|
|
|
+/* We use this as a starting path length. Not too large seems sane. */
|
|
|
+#define START_PATH_LENGTH 128
|
|
|
+/* Nobody has a maxpath longer than this, as far as I know. And if they
|
|
|
+ * do, they shouldn't. */
|
|
|
+#define MAX_SANE_PATH_LENGTH 4096
|
|
|
+ size_t path_length = START_PATH_LENGTH;
|
|
|
+ char *path = tor_malloc(path_length);
|
|
|
+
|
|
|
+ errno = 0;
|
|
|
+ while (getcwd(path, path_length) == NULL) {
|
|
|
+ if (errno == ERANGE && path_length < MAX_SANE_PATH_LENGTH) {
|
|
|
+ path_length*=2;
|
|
|
+ path = tor_realloc(path, path_length);
|
|
|
+ } else {
|
|
|
+ tor_free(path);
|
|
|
+ path = NULL;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ errno = saved_errno;
|
|
|
+ return path;
|
|
|
+}
|
|
|
+#endif
|
|
|
+
|
|
|
/** Expand possibly relative path <b>fname</b> to an absolute path.
|
|
|
* Return a newly allocated string, possibly equal to <b>fname</b>. */
|
|
|
char *
|
|
@@ -1709,23 +1742,25 @@ make_path_absolute(char *fname)
|
|
|
|
|
|
return absfname;
|
|
|
#else
|
|
|
- char path[PATH_MAX+1];
|
|
|
- char *absfname = NULL;
|
|
|
+ char *absfname = NULL, *path = NULL;
|
|
|
|
|
|
tor_assert(fname);
|
|
|
|
|
|
if (fname[0] == '/') {
|
|
|
absfname = tor_strdup(fname);
|
|
|
} else {
|
|
|
- if (getcwd(path, PATH_MAX) != NULL) {
|
|
|
+ path = alloc_getcwd();
|
|
|
+ if (path) {
|
|
|
tor_asprintf(&absfname, "%s/%s", path, fname);
|
|
|
+ tor_free(path);
|
|
|
} else {
|
|
|
/* If getcwd failed, the best we can do here is keep using the
|
|
|
* relative path. (Perhaps / isn't readable by this UID/GID.) */
|
|
|
+ log_warn(LD_GENERAL, "Unable to find current working directory: %s",
|
|
|
+ strerror(errno));
|
|
|
absfname = tor_strdup(fname);
|
|
|
}
|
|
|
}
|
|
|
-
|
|
|
return absfname;
|
|
|
#endif
|
|
|
}
|